JP6479521B2 - Exhaust turbine supercharger, main engine, ship - Google Patents

Description

  The present invention relates to an exhaust turbine supercharger including a motor generator, a main engine including an exhaust turbine supercharger, and a ship including the main engine.

For example, an internal combustion engine as a main engine mounted on a ship is equipped with a supercharger in order to improve fuel consumption and reduce CO ₂ in exhaust gas. This supercharger drives the turbine and the compressor using exhaust gas discharged from the internal combustion engine, and compresses and supplies intake air to the internal combustion engine to improve the output of the internal combustion engine. In addition, the motor generator is directly connected to the rotor shaft of the turbocharger, and the rotor shaft is driven and rotated by the motor generator, so that the compressor and the turbine are rotated, while the surplus energy that has driven the compressor is used for the generator. There is an exhaust turbine supercharger that generates electricity.

  Examples of such an exhaust turbine supercharger include those described in Patent Document 1 and Non-Patent Document 1 below.

JP2013-224672A

Mitsubishi Heavy Industries Technical Report Vol. 49 No. 1 (2012) Special issue on new products and new technologies "Practical application of large-scale marine hybrid turbocharger that generates power with exhaust gas"

  Such an exhaust turbine supercharger is generally arranged in an engine room together with an internal combustion engine. Since the ship navigates to regions with different environmental conditions, the temperature of the engine room changes depending on the region. At this time, for example, when moving from a high temperature and humidity region to a low temperature region, condensation tends to occur in the motor generator. Therefore, it is considered that current is passed through the stator winding in the motor generator to heat the winding with electric resistance to prevent the occurrence of condensation. However, when the internal combustion engine is started, the motor generator is used to rotate the compressor and the turbine. At this time, if current is passed through the stator windings to heat the motor generator, overcurrent flows through the motor generator. There is a problem that the fuse of the circuit is blown.

  The present invention solves the above-described problems, and an object thereof is to provide an exhaust turbine supercharger, a main engine, and a ship that suppress the occurrence of dew condensation in the motor generator and that can appropriately operate the motor generator. And

  In order to achieve the above object, an exhaust turbine supercharger according to the present invention includes a compressor and a turbine that are coaxially connected, a motor generator that is connected to a shaft end of the compressor, and a stator of the motor generator. A heater device for supplying current to the windings to heat, a rotation speed detection estimation device for detecting or estimating the rotation speed of the motor generator, and the rotation of the motor generator detected or estimated by the rotation speed detection estimation device And a control device that stops the heater device when the number exceeds a preset number of rotations set in advance.

  Therefore, by providing a heater device that supplies and heats the windings in the stator of the motor generator, it is possible to suppress the occurrence of condensation in the motor generator, and the motor generator connected to the compressor and the turbine. When the number of rotations exceeds the specified number of rotations, the heater device is stopped to stop the supply of current to the windings, so that no overcurrent flows through the motor generator, preventing the fuse from being blown. Therefore, the motor generator can be operated properly.

  In the exhaust turbine supercharger according to the present invention, the control device stops the heater device when a working gas command signal for supplying a working gas to the main engine is input.

  Therefore, by stopping the heater device by the working gas command signal, the heater device is stopped before the main machine, the compressor and the turbine are driven and rotated, so that no overcurrent flows to the motor generator and the fuse is blown. This can prevent the motor generator from operating properly.

  In the exhaust turbine supercharger of the present invention, when the working gas command signal is input, the control device stops the heater device, and then passes the predetermined first waiting time set in advance to the main engine. The supply of the working gas is started.

  Accordingly, the supply of the working gas to the main machine is started after the heater device is completely stopped by starting the supply of the working gas to the main machine after the first waiting time has elapsed since the input of the working gas command signal. Thus, even if an electrical delay occurs in the signal, the heater device can be properly stopped before the main engine, the compressor, and the turbine are driven to rotate.

  In the exhaust turbine supercharger according to the present invention, the control device stops the heater device when a fuel supply command signal for supplying fuel to the main engine is input.

  Therefore, by stopping the heater device in response to the fuel supply command signal, the heater device is stopped before the main engine, the compressor and the turbine are driven and rotated, so that no overcurrent flows to the motor generator and the fuse is blown. This can prevent the motor generator from operating properly.

  In the exhaust turbine supercharger of the present invention, when the fuel supply command signal is input, the control device stops the heater device, and then passes the predetermined first waiting time set in advance to the main engine. The supply of the working gas is started, and then the fuel is supplied to the main engine.

  Therefore, supply of working gas to the main engine is started after the first waiting time has elapsed since the fuel supply command signal was input, and then the fuel is supplied to the main engine. Even if an electrical delay occurs in the signal, the heater device can be properly stopped before the main engine, the compressor, and the turbine are driven to rotate.

  In the exhaust turbine supercharger of the present invention, an auxiliary blower for supplying combustion gas to the main engine is provided, and the control device stops the heater device when the auxiliary blower is activated.

  Therefore, by stopping the heater device when the auxiliary blower is started, the heater device is stopped before the main machine, the compressor and the turbine are driven to rotate, so that no overcurrent flows to the motor generator, and the fuse The motor generator can be operated properly by preventing the disconnection.

  In the exhaust turbine supercharger according to the present invention, the control device is configured to set a predetermined preset number when the rotational speed of the motor generator detected or estimated by the rotational speed detection estimation device is equal to or lower than a preset specified rotational speed. The heater device is operated after the elapse of the second waiting time.

  Accordingly, by operating the heater device after the second waiting time has elapsed after the motor generator has reached the specified speed or less, the drive shaft rotates for a predetermined time due to inertial force after the motor generator has stopped. However, the heater device is completely stopped during the second waiting time, the heater device can be operated after the motor generator is completely stopped, and the reliability can be improved.

  In the exhaust turbine supercharger according to the present invention, when the operating gas supply stop command signal is input, the control device operates the heater device after a predetermined third waiting time elapses. Yes.

  Accordingly, by operating the heater device after the elapse of the third waiting time after the working gas supply stop command signal is input, the drive shaft rotates for a predetermined time due to the inertial force after the compressor and the turbine are stopped. It will stop completely during 3 waiting time, a heater apparatus can be operated after a motor generator stops completely, and reliability can be improved.

  In the exhaust turbine supercharger according to the present invention, when the fuel supply stop command signal is input, the control device operates the heater device after a predetermined fourth waiting time elapses. .

  Therefore, by operating the heater device after the elapse of the third waiting time after the fuel supply stop command signal is input, the drive shaft is rotated for a predetermined time by the inertial force after the compressor and the turbine are stopped. The drive shaft is completely stopped during the waiting time, the heater device can be operated after the motor generator is completely stopped, and the reliability can be improved.

  In the exhaust turbine supercharger of the present invention, the control device operates the heater device after a predetermined fifth waiting time elapses after the driving of the auxiliary blower stops.

  Therefore, by operating the heater device after the elapse of the fifth waiting time after the driving of the auxiliary blower stops, the drive shaft rotates for a predetermined time due to inertial force after the compressor and turbine stop, but the fourth waiting time The drive shaft is completely stopped during the time, the heater device can be operated after the motor generator is completely stopped, and the reliability can be improved.

  Moreover, the main machine of this invention is provided with the main machine main body and the said exhaust turbine supercharger, It is characterized by the above-mentioned.

  Therefore, in the exhaust turbine supercharger, by providing a heater device that supplies and heats the windings in the stator of the motor generator, the occurrence of condensation in the motor generator can be suppressed, and the compressor and When the rotation speed of the motor generator connected to the turbine exceeds the specified rotation speed, the heater device is stopped and the supply of current to the winding is stopped. Therefore, the motor generator can be operated properly by preventing the fuse from being cut.

  Moreover, the ship of this invention is equipped with the said main engine, It is characterized by the above-mentioned.

  Therefore, the occurrence of condensation in the motor generator can be suppressed, the fuse can be prevented from being blown and the motor generator can be operated properly, and the stability during navigation can be improved.

  According to the exhaust turbine supercharger, the main engine, and the ship of the present invention, it is possible to suppress the occurrence of condensation in the motor generator, and it is possible to properly operate the motor generator by preventing the fuse from being cut.

FIG. 1 is a schematic configuration diagram illustrating a main engine including the exhaust turbine supercharger according to the first embodiment. FIG. 2 is a schematic diagram showing a current circuit of the motor generator. FIG. 3 is a flowchart showing air run mode control in a diesel engine. FIG. 4 is a time chart showing the control of the air run mode in the diesel engine. FIG. 5 is a flowchart showing control of the fuel operation mode in the diesel engine equipped with the exhaust turbine supercharger of the second embodiment. FIG. 6 is a time chart showing the control of the fuel operation mode in the diesel engine.

  Exemplary embodiments of an exhaust turbine supercharger, a main engine, and a ship according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, and when there are two or more embodiments, what comprises combining each embodiment is also included.

[First Embodiment]
FIG. 1 is a schematic configuration diagram illustrating a main engine including the exhaust turbine supercharger according to the first embodiment.

  In the first embodiment, as shown in FIG. 1, a marine diesel engine (internal combustion engine) 1 as a main engine includes a diesel engine body 2, an exhaust turbine supercharger 3, an auxiliary blower 4, and a control device 5. And. The diesel engine main body 2 is provided with a plurality of cylinder parts 13, and each cylinder part 13 is supported by a piston so as to be able to reciprocate inside each cylinder part 13. It is connected to the crankshaft via the head.

  The cylinder portion 13 is connected to a scavenging trunk 15 via an intake port 14 and to an exhaust manifold 17 via an exhaust port 16. The scavenging trunk 15 is connected to the compressor 21 of the exhaust turbine supercharger 3 via the intake pipe L1. Further, the exhaust manifold 17 is connected to the turbine 22 of the exhaust turbine supercharger 3 through an exhaust pipe L2. The cylinder portion 13 is provided with an injector (fuel supply device) 18 for injecting fuel (for example, heavy oil, natural gas, etc.). Each injector 18 is connected to a fuel pump (not shown).

  The exhaust turbine supercharger 3 is configured such that a compressor 21 and a turbine 22 are coaxially connected via a rotating shaft 23, and the compressor 21 and the turbine 22 can rotate integrally with the rotating shaft 23. The compressor 21 is connected to an intake pipe L3 that intakes air from the outside, and is connected to an intake pipe L1 that reaches the scavenging trunk 15. The turbine 22 is connected to an exhaust pipe L2 that reaches the exhaust manifold 17 and an exhaust pipe L4 that exhausts to the outside.

  Therefore, the turbine 22 is driven by the exhaust gas (combustion gas) guided from the exhaust manifold 17 through the exhaust pipe L2, and after driving the compressor 21, the exhaust gas is discharged from the exhaust pipe L4 to the outside. On the other hand, the compressor 21 is driven by the turbine 22 and compresses a gas such as air sucked from the intake pipe L3, and then pumps the compressed gas such as air from the intake pipe L1 to the scavenging trunk 15 as a combustion gas.

  Further, the diesel engine main body 2 is provided with a working gas supply device 24 that supplies working gas such as air to the cylinder portion 13 and raises the engine speed by operating a piston (not shown) of the cylinder portion 13. The working gas supply device 24 includes a working gas supply source 25 (for example, an accumulator or a pump), an on-off valve 26, and a working gas supply pipe L5. The working gas supply pipe L5 has a proximal end portion to which a working gas supply source 25 is connected, a distal end portion is connected to each cylinder portion 13, and a plurality of on-off valves 26 corresponding to each cylinder portion 13 are provided. Yes. When the marine diesel engine 1 is started, the working gas supply device 24 controls the opening and closing of each on-off valve 26 to supply and stop supplying the working gas from the working gas supply source 25 to the cylinder unit 13 from the working gas supply pipe L5. repeat. Thereby, without injecting fuel into the cylinder part 13, the piston (not shown) provided in the cylinder part 13 can be operated and the crankshaft can be rotated via the crosshead.

  In the present embodiment, the diesel engine main body 2 includes at least an air run mode (trial operation mode) and a fuel operation mode. The air run mode is an operation mode in which the crankshaft is rotated only by the working gas supply device 24, and is performed, for example, during maintenance of the diesel engine body 2. The fuel operation mode is an operation mode in which the crankshaft is started to rotate by the working gas supply device 24, and after the crankshaft reaches a predetermined rotational speed or more, fuel injection to the cylinder portion is started and the crankshaft is rotated.

  The exhaust turbine supercharger 3 is a hybrid supercharger, and a motor generator 32 is connected via a rotary shaft 31 coaxial with the rotary shaft 23 of the compressor 21 and the turbine 22. Although not shown, the motor generator 32 includes a rotor fixed to the rotary shaft 31 and a stator fixed to the casing and disposed around the rotor. The motor generator 32 has a power generation function for generating power by being driven by exhaust gas, and also has an electric function for driving and rotating the compressor 21 and the turbine 22.

  The exhaust turbine supercharger 3 includes a power conversion device 33. The power conversion device 33 includes a first power conversion unit 34, a power storage unit 35, and a second power conversion unit 36. The first power conversion unit 34 is connected to the motor generator 32, and converts AC power generated by the motor generator 32 into DC power and outputs it during the regenerative operation of the motor generator 32. The second power conversion unit 36 is connected to the inboard power system 37, and converts the DC power from the first power conversion unit 34 into three-phase AC power suitable for the inboard power system 37 during the regenerative operation of the motor generator 32. To the inboard power system 37. The power storage unit 35 is connected between the first power conversion unit 34 and the second power conversion unit 36 and stores the DC power from the first power conversion unit 34 by a predetermined amount. The power storage unit 35 is provided to smooth the power output to the second power conversion unit 36, and outputs the power stored at the start of the regenerative operation of the motor generator 32 to the second power conversion unit 36. The power output to the second power conversion unit 36 after the start of the regenerative operation is output from the motor generator 32 via the first power conversion unit 34.

  Further, the second power conversion unit 36 converts the three-phase AC power from the inboard power system 37 into DC power and outputs the DC power to the first power conversion unit 34 during the power running operation of the motor generator 32. The first power conversion unit 34 converts the DC power from the second power conversion unit 36 into AC power and outputs the AC power to the motor generator 32 during the power running operation of the motor generator 32. The power storage unit 35 stores the DC power from the second power conversion unit 36 by a predetermined amount. The power storage unit 35 is provided to smooth the power output to the first power conversion unit 34, and outputs the power stored at the start of the power running operation of the motor generator 32 to the first power conversion unit 34. The power output to the first power conversion unit 34 after the power running operation is started is output from the inboard power system 37 via the second power conversion unit 36.

  Here, although the configuration of the power conversion device 33 is not described in detail, for example, the first power conversion unit 34 is a converter, the power storage unit 35 is a capacitor, and the second power conversion unit 36 is an inverter.

  Further, the exhaust turbine supercharger 3 is provided with a space heater (heater device) 60 that supplies current to the windings in the stator of the motor generator 32 to heat it. As shown in FIG. 2, the motor generator 32 is configured by arranging a stator 62 on the outer peripheral side of the rotor 61, and the rotor 61 is configured such that a magnet 64 is fixed to a rotating shaft 63. A winding (coil) 66 is wound around the iron core 65. The space heater 60 supplies current to the winding 66 of the stator 62 to heat it.

  In the motor generator 32, the winding (coil) 66 of the stator 62 is connected to a first power supply 68 via a first switch 67 and a second power supply 71 via a fuse 69 and a second switch 70. Is connected. The winding 66 of the stator 62 represents the space between the three-phase star connections, and connection cables 72 and 73 are provided. The connection cables 72 and 73 are connected to the first branch cables 74 and 75, and the first branch cables 74 and 75 are connected to the first power supply 68 via the first switch 67. The connection cables 72 and 73 are connected to the second branch cables 76 and 77, and the second branch cables 76 and 77 are connected to the second power supply 71 via the fuse 69 and the first switch 70. Here, the first power supply 68 generates torque by supplying power to the motor generator 32, and is a power conversion device using a semiconductor. The second power supply 71 is heated by supplying power to the space heater 60. The first switch 67 and the second switch 70 can be selectively connected, and are controlled so as not to be turned on (conducted) at the same time.

  The space heater 60 supplies current to the winding 66 of the stator 62 and heats it, thereby heating the winding 66 by electric resistance and preventing the condensation in the stator 62. However, when a current is supplied from the second power source 71 to the stator 62 and the motor generator 32 rotates and a voltage is generated, an overcurrent flows through the second branch cables 76 and 77 and the fuse 69 is blown. End up.

  Therefore, in the present embodiment, as shown in FIG. 1, the exhaust turbine supercharger 3 is provided with a rotational speed sensor (rotational speed detection estimating device) 54 for the rotational speed of the motor generator 32, and the control device 5 The second switch 70 of the space heater 60 is shut off when the rotation speed of the motor generator 32 detected by the rotation speed sensor 54 exceeds a preset specified rotation speed.

  On the other hand, the rotation speed sensor 54 does not ensure sufficient detection accuracy. That is, the rotation speed sensor 54 is not capable of sufficiently detecting all the rotation ranges in the motor generator 32, and is capable of sufficiently detecting all the rotation ranges in the motor generator 32. It is very expensive and the cost of parts is greatly increased. Therefore, in the present embodiment, signals from various devices are used in combination as a rotation speed detection estimation device that estimates the rotation speed of the motor generator 32.

  The auxiliary blower 4 includes a blower impeller 41 and a blower motor (motor) 42. The auxiliary blower 4 is driven when the marine diesel engine 1 is started to compress a gas such as air taken in from the intake pipe L3 via the compressor 21, and then the compressed air or the like is used as a combustion gas. Pressure is fed from the intake pipe L6 to the scavenging trunk 15 via the intake pipe L1. Although the intake pipe L6 is provided in parallel with the intake pipe L1, and the auxiliary blower 4 (blower impeller 41) is provided in the intake pipe L6, the intake pipe L1 and the intake pipe L6 do not need to be provided in parallel. Without providing the pipe L6, only the intake pipe L1 may be provided, and the auxiliary blower 4 may be provided in the intake pipe L1.

  The control device 5 includes a first control device 51 that controls the motor generator 32 and a second control device 52 that controls the diesel engine main body 2 and the auxiliary blower 4.

  The first control device 51 can control the motor generator 32 by controlling the first power converter 34 and the second power converter 36. That is, the first control device 51 controls the functions of the first power conversion unit 34 and the second power conversion unit 36 according to the driving state (regenerative operation state or powering operation state) of the motor generator 32.

  The second control device 52 can drive and control the injector 18 and the working gas supply device 24 in the diesel engine main body 2. The second control device 52 controls the fuel injection timing and the fuel injection amount by driving the injectors 18. Further, the second control device 52 controls opening / closing of the on-off valve 26 constituting the working gas supply device 24 to control the working gas supply timing and the working gas supply amount to the cylinder portion 13. Further, the second control device 52 can control the scavenging pressure (intake pressure) by driving the auxiliary blower 4 to supply combustion gas such as compressed air to the diesel engine body 2.

  The second control device 52 is connected to a control device 53 that outputs various command signals when navigating the ship. The control device 53 can select at least an air run mode and a fuel operation mode. The start / stop command signal for the auxiliary blower 4 is sent to the second control device 52, and the air run command signal (working gas) is sent to the diesel engine body 2. Command signal, working gas supply stop command signal), and a fuel operation command signal (fuel supply command signal, fuel supply stop command signal) can be output to the diesel engine body 2.

  When the engine start preparation signal is input, the control device 5 starts driving the auxiliary blower 4 to pump the compressed gas or the like as a combustion gas to the scavenging trunk 15 of the marine diesel engine 1 for sweeping. Increase atmospheric pressure (intake pressure). When the engine rotation start signal is input, the control device 5 starts driving the working gas supply device 24, thereby increasing the engine speed and setting the engine speed to a preset fuel supply start speed. When reaching, each injector 18 is driven to supply fuel to the diesel engine body 2. Then, the marine diesel engine 1 starts operation by combustion.

  In addition, when the engine start preparation signal is input, the control device 5 controls the second power conversion unit 36 to convert the three-phase AC power from the inboard power system 37 into DC power to the power storage unit 35. The power is stored, and the voltage of the power storage unit 35 is made to reach a preset standby voltage. When the voltage of the power storage unit 35 reaches the standby voltage, the control device 5 controls the first power conversion unit 34 to convert the DC power of the power storage unit 35 into AC power and drive the motor generator 32. On the other hand, the driving of the auxiliary blower 4 is stopped and the exhaust turbine supercharger 3 is set to the power supply mode. Thereafter, the control device 5 sets the normal operation mode in which the exhaust turbine supercharger 3 is driven only by the exhaust gas. When the load further increases and surplus exhaust gas is generated more than the energy required for driving the exhaust turbine supercharger 3, the surplus exhaust gas energy is recovered as electric energy and driven by the motor generator 32. The generated electric power is output to the inboard power system 37, and the exhaust turbine supercharger 3 is set to the power generation mode.

  In the first embodiment, the control device 5 stops the space heater 60 when the rotational speed of the motor generator 32 detected by the rotational speed sensor 54 exceeds a preset predetermined rotational speed in the air run mode. . That is, the control device 5 stops the space heater 60 when an air run command signal (operating gas command signal) for supplying a working gas such as air to the cylinder portion 13 of the diesel engine body 2 is input. At this time, when the air run command signal is input, the control device 5 stops the space heater 60 and then starts air run after the elapse of a predetermined first waiting time T1 preset after the air run command signal is input. To do.

  On the other hand, when the rotational speed of the motor generator 32 detected by the rotational speed sensor 54 is equal to or lower than a preset specified rotational speed in the air run mode, the control device 5 has a predetermined second waiting time T2 set in advance. After the elapse of time, the space heater 60 is activated. That is, the control device 5 operates the space heater 60 after elapse of a predetermined third waiting time T3 when the air run command signal is not input (the working gas supply stop command signal is input).

  Here, the control method of the exhaust turbine supercharger of the first embodiment will be described in detail using a flowchart and a time chart. FIG. 3 is a flowchart showing the control of the air run mode in the diesel engine, and FIG. 4 is a time chart showing the control of the air run mode in the diesel engine.

  In the exhaust turbine supercharger control method of the first embodiment, in the air run mode of the marine diesel engine 1, as shown in FIG. 3, the control device 5 is in step S <b> 1, and the control device 5 is from the control device 53. It is determined whether an air run command signal is input (ON). Here, if it is determined that the air run command signal is not input (No), the process waits as it is. If it is determined that the air run command signal is input (Yes), the process proceeds to step S2. In step S2, the space heater 60 that has been operating is stopped.

  In step S3, control device 5 determines whether or not a predetermined first waiting time T1 has elapsed since the air run command signal was input. Here, if it is determined (No) that the first waiting time T1 has not elapsed since the input of the air run command signal, the process waits as it is, and the first waiting time T1 has elapsed since the input of the air run command signal. If it determines (Yes), an air run will be started in Step S4.

  In step S5, the control device 5 determines whether or not the input of the air run command signal has been stopped (OFF). Here, if it is determined that the air run command signal is input (No), it waits as it is, and if it is determined that the air run command signal is not input (Yes), the air run is terminated in step S6.

  In step S <b> 7, the control device 5 determines that the predetermined second waiting time T <b> 2 has elapsed after the rotational speed of the motor generator 32 detected by the rotational speed sensor 54 becomes equal to or lower than a predetermined rotational speed (for example, 10 rpm). Determine if it has passed. Here, if it is determined (No) that the second waiting time T2 has not elapsed after the rotational speed of the motor generator 32 becomes equal to or less than the specified rotational speed, the process waits as it is, and the rotational speed of the motor generator 32 is specified. If it is determined (Yes) that the second waiting time T2 has elapsed since the rotation speed became lower than the rotation speed, the process proceeds to step S8.

  In step S8, the control device 5 determines whether or not a predetermined third waiting time T3 has elapsed since the input of the air run command signal has been stopped (OFF). Here, if it is determined (No) that the third waiting time T3 has not elapsed since the input of the air run command signal is lost, the process waits as it is, and the third waiting time T3 has elapsed after the input of the air run command signal is lost. If it determines with having carried out (Yes), the space heater 60 will be actuated in step S9.

  Moreover, the operation stop timing of the space heater in the exhaust turbine supercharger of the first embodiment will be described. As shown in FIG. 4, when an air run command signal is input at time t1, the space heater 60 is stopped. The air run is started at time t2 when the first waiting time T1 has elapsed since the air run command signal was input. Then, the crankshaft is rotated by supplying the working gas to the cylinder portion 13 of the diesel engine main body 2, and the compressor 21 and the turbine 22 are rotated by discharging the working gas from the cylinder portion 13. The rotation speed increases.

  When no air run command signal is input at time t3, the air run is terminated. Then, the supply of the working gas to the cylinder portion 13 of the diesel engine main body 2 is stopped, the rotation of the crankshaft is stopped, and the discharged working gas is reduced, whereby the compressor 21 and the turbine 22 are stopped. The rotation speed of the feeder is reduced. Then, the time t5 when the second waiting time T2 has elapsed from the time t4 when the rotation speed of the motor generator 32 has become equal to or less than the specified rotation speed, and the time t3 when the third waiting time T3 has elapsed from the time t3 when the input of the air run command signal has ceased. Then, the stopped space heater 60 is operated. The reason why the second and third waiting times T2 and T3 are set is that the motor generator 32, the compressor 21 and the turbine 22 cannot be stopped immediately even if a drive stop signal is output, and the inertial force is applied only for a predetermined time. This is because the space heater 60 is operated after the motor generator 32 is completely stopped.

  The second and third waiting times T2 and T3 have been described as having elapsed at time t5. However, the second and third waiting times T2 and T3 are different because they have different set times. It may elapse over time. In this case, the space heater 60 is operated at the time when all the elapsed times T2 and T3 have elapsed.

  Here, in the present embodiment, the space heater 60 is configured to operate in accordance with the rotational speed of the motor generator 32 and the air run command signal, but the present invention is not limited to this configuration.

  Thus, in the exhaust turbine supercharger of the first embodiment, the compressor 21 and the turbine 22 that are coaxially connected, the motor generator 32 that is connected to the shaft end of the compressor 21, and the motor generator 32 are connected. A space heater 60 for supplying current to the winding 66 of the stator 62 for heating, a rotation speed sensor 54 for detecting the rotation speed of the motor generator 32, and the rotation speed of the motor generator 32 detected by the rotation speed sensor 54. Is provided with a control device 5 that stops the space heater 60 when a predetermined rotational speed exceeds a preset value.

  Therefore, by providing the space heater 60 that supplies and heats the winding 66 in the stator 62 of the motor generator 32, the occurrence of condensation in the motor generator 32 can be suppressed. In addition, when the rotational speed of the motor generator 32 connected to the compressor 21 and the turbine 22 exceeds the specified rotational speed, the current supply to the winding 66 is stopped by stopping the space heater 60, so that the electric motor An overcurrent does not flow through the generator 32, and the motor generator 32 can be operated properly by preventing the fuse 69 from being cut.

  In the exhaust turbine supercharger of the first embodiment, the control device 5 stops the space heater 60 when an operating gas command signal for supplying air to the diesel engine body 2 is input. Therefore, the space heater 60 is stopped before the diesel engine main body 2, the compressor 21 and the turbine 22 are driven to rotate, so that no overcurrent flows through the motor generator 32 and the fuse 69 is prevented from being cut. The generator 32 can be operated appropriately.

  In the exhaust turbine supercharger of the first embodiment, when the working gas command signal is input, the control device 5 stops the space heater 60 and then starts an air run after the first waiting time T1 has elapsed. Accordingly, the air run is started after the space heater 60 is completely stopped, and even if an electrical delay of the signal occurs, the diesel engine main body 2, the compressor 21, and the turbine 22 are properly driven before the rotation. The space heater 60 can be stopped.

  In the exhaust turbine supercharger of the first embodiment, when the rotational speed of the motor generator 32 detected by the rotational speed sensor 54 becomes equal to or lower than the specified rotational speed, the control device 5 causes the space heater 60 to pass after the second waiting time T2 has elapsed. Actuate. Accordingly, after the motor generator 32 is stopped, the rotor 61 is rotated for a predetermined time due to the inertial force. However, the rotor 61 is completely stopped during the second waiting time T2, and the motor generator 32 is completely stopped. The space heater 60 can be operated, and the reliability can be improved.

  In the exhaust turbine supercharger of the first embodiment, when the working gas supply stop command signal is input, the control device 5 operates the space heater 60 after elapse of the third waiting time T3. Therefore, after the compressor 21 and the turbine 22 are stopped, the rotary shaft 23 is rotated for a predetermined time due to the inertial force, but is completely stopped during the third waiting time T3, and the motor generator 32 is completely stopped. Then, the space heater 60 can be operated, and the reliability can be improved.

  Moreover, in the main machine of 1st Embodiment, the diesel engine main body 2 and the exhaust turbine supercharger 3 are provided. Therefore, in the exhaust turbine supercharger 3, by providing the space heater 60 that supplies and heats the winding 66 in the stator 62 of the motor generator 32, the generation of condensation in the motor generator 32 is suppressed. be able to. In addition, when the rotational speed of the motor generator 32 connected to the compressor 21 and the turbine 22 exceeds the specified rotational speed, the current supply to the winding 66 is stopped by stopping the space heater 60, so that the electric motor An overcurrent does not flow through the generator 32, and the motor generator 32 can be operated properly by preventing the fuse 69 from being cut.

  Moreover, in the ship of 1st Embodiment, the marine diesel engine 1 is provided. Therefore, the generation of condensation in the motor generator 32 can be suppressed, the fuse 69 can be prevented from being cut and the motor generator 32 can be operated properly, and the stability during navigation can be improved. .

[Second Embodiment]
FIG. 5 is a flowchart showing the control of the fuel operation mode in the diesel engine provided with the exhaust turbine supercharger of the second embodiment, and FIG. 6 is a time chart showing the control of the fuel operation mode in the diesel engine. Note that the basic configuration of the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIG. 1, and members having the same functions as those of the first embodiment are the same. Detailed description will be omitted.

  In the second embodiment, as shown in FIG. 1, the second control device 52 is connected to a control device 53 that outputs various command signals when navigating the ship. The control device 53 can select at least an air run mode and a fuel operation mode. The start / stop command signal for the auxiliary blower 4 is sent to the second control device 52, and the air run command signal (working gas) is sent to the diesel engine body 2. Command signal, working gas supply stop command signal), and a fuel operation command signal (fuel supply command signal, fuel supply stop command signal) can be output to the diesel engine body 2.

  In the fuel operation mode, the control device 5 stops the space heater 60 when the rotation speed of the motor generator 32 detected by the rotation speed sensor 54 exceeds a preset specified rotation speed. That is, the control device 5 stops the space heater 60 when a fuel operation command signal (fuel supply command signal) for supplying working gas such as air and fuel is input to the cylinder portion 13 of the diesel engine body 2. At this time, when the fuel operation command signal is input, the control device 5 stops the space heater 60, and after a predetermined first waiting time T11 preset after the fuel operation command signal is input, Supply of the working gas from the working gas supply device 24 to the cylinder unit 13 is started. The rotation of the crankshaft is started by the working gas, and the supply of fuel is started after the crankshaft reaches a certain rotational speed N1 or more. When the fuel operation starts, the rotation speed of the crankshaft further increases and becomes equal to or higher than a certain rotation speed N2 (N2> N1), and then the supply of working gas is stopped.

  Further, the control device 5 stops the space heater 60 when the auxiliary blower 4 is activated.

  On the other hand, in the fuel operation mode, when the rotational speed of the motor generator 32 detected by the rotational speed sensor 54 becomes equal to or less than a predetermined specified rotational speed, the control device 5 sets a predetermined second waiting time T12. After the elapse of time, the space heater 60 is operated. That is, when the fuel operation command signal is no longer input (the fuel supply stop command signal is input), the control device 5 operates the space heater 60 after a predetermined fourth waiting time T14 has elapsed. Further, the control device 5 operates the space heater 60 after elapse of a predetermined fifth waiting time T15 set in advance after the driving of the auxiliary blower 4 is stopped.

  Here, the control method of the exhaust turbine supercharger of the second embodiment will be described in detail using a flowchart and a time chart.

  In the control method of the exhaust turbine supercharger of the second embodiment, in the fuel operation mode of the marine diesel engine 1, as shown in FIG. 5, the control device 5 sends an engine start preparation signal from the control device 53 in step S21. Is input, the auxiliary blower 4 is actuated to pump the combustion gas to the cylinder portion 13 via the scavenging trunk 15 and raise the scavenging pressure (intake pressure). In step S22, the space heater 60 that has been operating is stopped. In step S23, the control device 5 determines whether or not a fuel operation command signal is input from the control device 53 (ON). Here, if it is determined that the fuel operation command signal is not input (No), the process stands by, and if it is determined that the fuel operation command signal is input (Yes), the process proceeds to step S24.

  In step S24, the control device 5 determines whether or not a predetermined first waiting time T11 has elapsed since the fuel operation command signal was input. Here, if it is determined (No) that the first waiting time T11 has not elapsed since the fuel operation command signal was input, the process waits as it is, and the first waiting time T11 has elapsed since the fuel operation command signal was input. If it determines with having carried out (Yes), an air run will be started in step S25. In step S26, control device 5 determines whether the air run has ended. Here, if it is determined that the air run has not ended (No), the process waits as it is, and if it is determined that the air run has ended (Yes), the air run is ended in step S27. And in step S28, the control apparatus 5 starts this diesel engine main body 2 by starting fuel supply with respect to the diesel engine main body 2. FIG.

  When the engine rotation start signal is input, the control device 5 controls the opening / closing of the on-off valve 26 to supply the working gas to the diesel engine main body 2, thereby executing an air run to increase the engine speed. . When the engine speed reaches the fuel supply start speed, the control device 5 drives the injector 18 and injects fuel into the cylinder portion 13 of the diesel engine body 2. Then, the marine diesel engine 1 starts combustion by igniting the fuel in the cylinder portion 13 and starting combustion.

  In step S29, the control device 5 determines whether or not the fuel operation command signal has been input (OFF). Here, if it is determined that the fuel operation command signal is input (No), the process waits as it is, and if it is determined that the fuel operation command signal is not input (Yes), the diesel engine main body is determined in Step S30. 2 stops fuel supply. In step S31, the control device 5 stops the operation of the auxiliary blower 4.

  In step S <b> 32, the control device 5 determines that the predetermined second waiting time T <b> 12 has elapsed after the rotational speed of the motor generator 32 detected by the rotational speed sensor 54 becomes equal to or less than a predetermined rotational speed (for example, 10 rpm). Determine if it has passed. Here, if it is determined (No) that the second waiting time T12 has not elapsed since the rotation speed of the motor generator 32 becomes equal to or less than the specified rotation speed, the process waits as it is, and the rotation speed of the motor generator 32 is specified. If it is determined (Yes) that the second waiting time T12 has elapsed since the rotation speed became lower than the rotation speed, the process proceeds to step S33.

  In step S <b> 33, the control device 5 determines whether or not a predetermined fourth waiting time T <b> 14 has elapsed after the fuel operation command signal is no longer input (OFF). Here, if it is determined (No) that the fourth waiting time T14 has not elapsed after the fuel operation command signal is no longer input, the process waits as it is, and the fourth waiting time T14 after the fuel operation command signal is no longer input. When it is determined that Yes has passed (Yes), the process proceeds to step S34.

  In step S34, the control device 5 determines whether or not a predetermined fifth waiting time T15 has elapsed since the driving of the auxiliary blower 4 was stopped. Here, if it is determined (No) that the fifth waiting time T15 has not elapsed since the driving of the auxiliary blower 4 is stopped, the process waits as it is, and the fifth waiting time T15 after the driving of the auxiliary blower 4 is stopped. When it is determined that the time elapses (Yes), the space heater 60 is operated in step S35.

  Moreover, the operation stop timing of the space heater in the exhaust turbine supercharger of the first embodiment will be described. As shown in FIG. 6, at time t11, the auxiliary blower 4 is activated and the space heater 60 is stopped. At time t12, a fuel operation command signal is input, and at time t13 when the first waiting time T11 has elapsed since the fuel operation command signal was input, an air run is started. Then, when the air is supplied to the diesel engine main body 2, the crankshaft rotates, and when this air is discharged, the compressor 21 and the turbine 22 rotate, and the turbocharger speed increases. In addition, at the time t14, the air run is terminated and the fuel supply is started, thereby starting the diesel engine main body 2.

  Thereafter, when the fuel operation command signal is no longer input at time t15, the fuel supply is terminated and the driving of the diesel engine body 2 is stopped. Then, the rotation of the crankshaft is stopped by stopping the diesel engine main body 2, the rotation of the compressor 21 and the turbine 22 is stopped by reducing the exhaust gas, and the turbocharger rotational speed is lowered. Then, the second waiting time T12 elapses from time t16 when the rotation speed of the motor generator 32 becomes equal to or less than the specified rotation speed, and the fourth waiting time T14 elapses from time t15 when the fuel operation command signal is not input. The stopped space heater 60 is operated at a time t18 when the fifth waiting time T15 has elapsed from a time t17 when the driving of the auxiliary blower 4 is stopped.

  The second, fourth, and fifth waiting times T12, T14, and T15 have been described as having elapsed at time t18. However, the second, fourth, and fifth waiting times T12, T14, and T15 are set times. May be different at different times. In this case, the space heater 60 is operated at the time when all the elapsed times T12, T14, T15 have elapsed.

  Here, in the present embodiment, the space heater 60 is configured to operate in accordance with the rotational speed of the motor generator 32, the fuel operation command signal, and the drive stop signal of the auxiliary blower 4. However, the present invention is limited to this configuration. It is not something. As described above, the exhaust turbine supercharger 3 can rotate the compressor 21 and the turbine 22 when the diesel engine main body 2 is started by supplying power to the motor generator 32, so that the auxiliary blower 4 can be eliminated. it can.

  When there is no auxiliary blower 4, as shown by a two-dot chain line in FIG. 6, at time t <b> 12, the space heater 60 is stopped when the air run command signal is input. The air run is started at time t13 when the first waiting time T11 has elapsed since the signal was input. The reason for setting the first waiting time T11 is to start the air run after the space heater 60 is completely stopped in response to the input of the air run command signal. Then, the second waiting time T12 has elapsed from the time t16 when the rotational speed of the motor generator 32 has become equal to or less than the specified rotational speed, and the fourth waiting time T14 has elapsed from the time t15 when the fuel operation command signal is not input. At t18, the stopped space heater 60 is operated.

  Thus, in the exhaust turbine supercharger of the second embodiment, the control device 5 stops the space heater 60 when the fuel supply command signal for supplying air and fuel to the diesel engine body 2 is input. . Therefore, the space heater 60 is stopped before the diesel engine main body 2, the compressor 21 and the turbine 22 are driven to rotate, so that no overcurrent flows through the motor generator 32 and the fuse 69 is prevented from being cut. The generator 32 can be operated appropriately.

  In the exhaust turbine supercharger of the second embodiment, when the fuel supply command signal is input, the control device 5 stops the space heater 60 and then starts an air run after the first waiting time T11 has elapsed. Supply fuel after completion. Accordingly, the air run is started after the space heater 60 is completely stopped, and even if an electrical delay of the signal occurs, the diesel engine main body 2, the compressor 21, and the turbine 22 are properly driven before the rotation. The space heater 60 can be stopped.

  In the exhaust turbine supercharger of the second embodiment, the control device 5 stops the space heater 60 when the auxiliary blower 4 is activated. Therefore, the space heater 60 is stopped before the diesel engine main body 2, the compressor 21 and the turbine 22 are driven to rotate, so that no overcurrent flows through the motor generator 32 and the fuse 69 is prevented from being cut. The generator 32 can be operated appropriately.

  In the exhaust turbine supercharger of the second embodiment, when the rotational speed of the motor generator 32 detected by the rotational speed sensor 54 becomes equal to or less than the specified rotational speed, the control device 5 causes the space heater 60 to pass after the second waiting time T12 has elapsed. Actuate. Therefore, after the motor generator 32 is stopped, the rotor 61 is rotated for a predetermined time due to the inertial force. However, the rotor 61 is completely stopped during the second waiting time T12, and the motor generator 32 is completely stopped. The space heater 60 can be operated, and the reliability can be improved.

  In the exhaust turbine supercharger of the second embodiment, when the fuel supply stop command signal is input, the control device 5 operates the space heater 60 after the fourth waiting time T14 has elapsed. Therefore, after the compressor 21 and the turbine 22 are stopped, the rotary shaft 23 is rotated for a predetermined time due to the inertial force, but is completely stopped during the fourth waiting time T14, and the motor generator 32 is completely stopped. Then, the space heater 60 can be operated, and the reliability can be improved.

  In the exhaust turbine supercharger of the second embodiment, the control device 5 operates the space heater 60 after the fifth waiting time T15 has elapsed since the driving of the auxiliary blower 4 was stopped. Therefore, after the compressor 21 and the turbine 22 are stopped, the rotary shaft 23 is rotated for a predetermined time due to the inertial force, but is completely stopped during the fifth waiting time T15, and the motor generator 32 is completely stopped. Then, the space heater 60 can be operated, and the reliability can be improved.

  In the above-described embodiment, the stop of the space heater 60 is controlled according to the air run command signal, the fuel operation command signal, and the stop signal of the auxiliary blower 4, and the rotation speed of the motor generator 32, the air run command signal, the fuel operation command The operation of the space heater 60 is controlled according to the signal and the drive stop signal of the auxiliary blower 4, but is not limited to this combination. The operation of the space heater 60 may be controlled only by the number of rotations of the motor generator 32, or the number of rotations of the motor generator 32 may be eliminated, and the operation of the space heater 60 may be performed only by other signals or combinations of signals. You may make it control.

1 Marine diesel engine (main engine)
2 Diesel engine body 3 Exhaust turbine supercharger (supercharger)
DESCRIPTION OF SYMBOLS 4 Auxiliary blower 5 Control apparatus 13 Cylinder part 18 Injector 21 Compressor 22 Turbine 24 Working gas supply apparatus 25 Working gas supply source 26 On-off valve 32 Motor generator 33 Power converter 34 1st power converter 35 Power storage part 36 2nd power conversion Unit 37 Inboard Power System 51 First Control Device 52 Second Control Device 53 Control Device 54 Rotational Speed Sensor (Rotational Speed Detection Estimation Device)
60 Space heater (heater device)
61 Rotor 62 Stator 66 Winding (coil)
67 First switch 68 First power source 69 Fuse 70 Second switch 71 Second power source L1, L3 Intake pipe L2, L4 Exhaust pipe L5 Working gas supply pipe

Claims (11)

A compressor and a turbine coupled on the same axis;
A motor generator coupled to a shaft end of the compressor;
A heater device for supplying current to the windings in the stator of the motor generator for heating;
A control device for stopping the heater device before the compressor and the turbine are driven;
Bei to give a,
When the operating gas command signal for supplying the operating gas to the main machine is input, the control device stops the heater device.
An exhaust turbine supercharger characterized by that. When the working gas command signal is input, the control device stops supplying the working gas to the main engine after a predetermined first waiting time has elapsed after stopping the heater device. The exhaust turbine supercharger according to claim 1 , wherein Wherein the controller, when operating gas supply stop command signal is input, according to claim 1 or claim 2, characterized in that to operate the heating device after a lapse of a preset predetermined third waiting time Exhaust turbine turbocharger. A compressor and a turbine coupled on the same axis;
A motor generator coupled to a shaft end of the compressor;
A heater device for supplying current to the windings in the stator of the motor generator for heating;
A control device for stopping the heater device before the compressor and the turbine are driven;
Bei to give a,
The control device stops the heater device when a fuel supply command signal for supplying fuel to the main engine is input.
An exhaust turbine supercharger characterized by   When the fuel supply command signal is input, the control device starts supplying the working gas to the main engine after elapse of a predetermined first waiting time after stopping the heater device, and thereafter The exhaust turbine supercharger according to claim 4, wherein fuel is supplied to the main engine.   6. The control device according to claim 4, wherein, when a fuel supply stop command signal is input, the control device operates the heater device after a predetermined fourth waiting time has elapsed. Exhaust turbine supercharger. A compressor and a turbine coupled on the same axis;
A motor generator coupled to a shaft end of the compressor;
A heater device for supplying current to the windings in the stator of the motor generator for heating;
A control device for stopping the heater device before the compressor and the turbine are driven;
Bei to give a,
An auxiliary blower for supplying combustion gas to the main machine is provided, and the control device stops the heater device when the auxiliary blower is activated.
An exhaust turbine supercharger characterized by that. The exhaust gas turbocharger according to claim 7 , wherein the control device operates the heater device after a predetermined fifth waiting time elapses after the driving of the auxiliary blower is stopped. . A rotation speed detection and estimation device for detecting or estimating the rotation speed of the motor generator is provided, and the control device is a rule in which the rotation speed of the motor generator detected or estimated by the rotation speed detection and estimation device is preset. The exhaust turbine supercharger according to any one of claims 1 to 8 , wherein the heater device is operated after elapse of a predetermined second waiting time set in advance when the rotational speed is equal to or lower than a rotational speed. . The main unit,
An exhaust turbine supercharger according to any one of claims 1 to 9 ,
The main machine characterized by comprising. A ship comprising the main machine according to claim 10 .

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