JP3309270B2 - Multiple shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a multiple shield machine, and more particularly to synchronous control of a plurality of cutter heads.

[0002]

2. Description of the Related Art As an example of a conventional multiple shield machine, a case of two shield machines will be described with reference to FIG. This shield machine has an A-axis cutter head 21A and a B-axis cutter head 21B, and the A-axis cutter head 21A has a plurality (three as an example) of motors 22A-1, 22A-2,
22A-3, the B-axis cutter head 21B includes a plurality (three as an example) of motors 22B-1, 22B-2, and 22B.
-3, respectively. Of the three motors on each axis, the motors 22A-1 and 22B-1 are drive-controlled by inverter units 23A-1 and 23B-1 for speed control, respectively, and the remaining motors 22A-2 and 22A are controlled.
-3, 22B-2 and 22B-3 are inverter units 22A-2, 22A-3 and 22B for torque control.
-2 and 22B-3, respectively. An AC power supply is connected to each inverter unit via AC reactors 24A and 24B, rectifier circuits 25A and 25B, and the like.

Here, the speed command value is given from the speed command device 26 to the inverter unit 23A-1 based on the A-axis cutter head 21A. Each of the inverter units 23A-1 and 23B-1 can be provided with an inching speed setting value for an inching operation from the inching speed setting units 27A and 27B. An angle deviation (position deviation) between the two cutter heads is detected by a position detector 28 provided on the B-axis cutter head 21B and a deviation detector 29 provided on the A-axis cutter head 21A. It is added as a correction value to the speed command value given to inverter unit 23B-1.

The description of the components other than the above and the internal configuration and operation of each inverter unit is omitted.

[0005] The speed command value is determined by the inverter unit 23A-
It is commonly provided to both 1, 23B-1 so as to have the same speed. Here, since the A-axis cutter head 21A is the reference, the A-axis cutter head 21A immediately has the given speed setting. On the other hand, the B-axis cutter head 21
The speed command value for B is a value obtained by adding a speed command value of the A-axis cutter head 21A to a correction value based on the amount of angular deviation from the deviation detector 29.

As a result, the B-axis cutter head 21B
When it is behind the shaft cutter head 21A, the B-axis cutter head 21B becomes faster and the B-axis cutter head 2
When 1B is too advanced, it is controlled to be late,
Synchronization is maintained.

[0007]

As described above, in the multiple shield machine, it is necessary to perform synchronous control to prevent collision between adjacent spokes in a plurality of cutter heads. Are each provided with a complicated inverter unit. For this reason, the installation space for the inverter unit is increased, and maintenance is troublesome.

An object of the present invention is to provide a multiple shield machine capable of simplifying the configuration by omitting an inverter unit for at least one of a plurality of cutter heads.

[0009]

According to the present invention, one cutter head in a multiple shield machine is supplied with a power supply as it is.
Or a general-purpose motor constant rotation supplied, and configured to drive the motor according to the possible sensorless vector in <br/> inverter control of the rotational speed control and the remaining cutter head, wherein
With respect to the cutter head on the general-purpose motor side,
The cutter head on the vector inverter side
In order to maintain the speed , the general-purpose motor side speed detection signal is given to the sensorless vector inverter side as a speed command value, and the angle deviation between the general-purpose motor side cutter head and the sensorless vector inverter side cutter head is detected. Means, and adding this angle deviation to the speed command value as a speed command correction value,
The cutter head on the sensorless vector inverter side
Thus, a multiple shield machine characterized in that only the shift control is performed is obtained. In addition, the one cutter head
Is driven by a plurality of the general-purpose motors, and the remaining cutters
-The heads are each the sensorless vector inverter
Driven by multiple motors under control, in this case one
From the speed detector provided on the output side of the general-purpose motor
Using a speed detection signal as the speed command value,
It is given to each of the sale vector inverters.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention focuses on the following points. That is, the inverter unit combined with the motor in the cutter head is for changing the output rotation of the motor. However, the multiple shield machine does not shift the cutter head during excavation. Therefore, if the purpose of the inverter unit is to perform synchronous control, in the case of a double cutter head, one of the cutter heads is driven by a general-purpose motor having a constant speed, and the other cutter head is driven. What is necessary is just to drive with the motor controlled by an inverter unit.
That is, the other cutter head may be controlled by a motor combined with an inverter unit so as to synchronize with the cutter head driven by the general-purpose motor.

A preferred embodiment of the present invention will be described with reference to FIG. Here, a double shield machine including the A-axis cutter head 11A and the B-axis cutter head 11B will be described. A-axis cutter head 11
The A and B axis cutter heads 11B are each driven by three motors, but the A axis cutter head 11A is a general-purpose induction type motor 12A having no control unit.
-1, 12A-2, and 12A-3.
Only the shaft cutter head 11B is a sensorless vector inverter unit (hereinafter referred to as an inverter unit) 1
The motors are driven by induction type motors 12B-1, 12B-2, and 12B-3 controlled by 3-1, 13-2, and 13-3. From this, the motors 12B-1, 12B
-2, 12B-3 may be called an inverter motor.

With the above configuration, the motor 12
AC power is supplied to A-1, 12A-2, and 12A-3 as they are, and inverter units 13-1 to 13-1 are supplied.
An AC power supply is connected to 3-3 via an AC reactor 14 and a rectifier circuit 15. It should be noted that the motors 12A-1, 1
The clutches 26-1, 26-2, and 2 are provided between the output shafts 2A-2 and 12A-3 and the gears rotationally driven thereby.
6-3. The rotation speed on the output side of the clutch 26-3 is detected by the speed detector TG, and is provided to the inverter units 13-1 to 13-3 as a speed command value. The inverter units 13-1 to 13-3 also have
An inching speed setting value can be given from the inching speed setting device 27. Also, the B-axis cutter head 11B
Detector 18 and A-axis cutter head 11 provided in
An angular deviation (positional deviation) between both cutter heads is detected by a deviation detector 19 provided at A, and this detection signal is added to the speed command value as a correction value. The description of the other components and the internal configuration and operation of each inverter unit will be omitted.

In this shield machine, since the A-axis cutter head 11A is driven by a general-purpose motor, it cannot change gears, and rotates at a constant speed when it starts and completes acceleration. on the other hand,
Inverter unit 13- of the B-axis cutter head 11B
The speed commands for 1 to 13-3 are values obtained by adding the detection value of the speed detector TG on the side of the A-axis cutter head 11A and the correction value based on the deviation between the angles of both cutter heads.

As a result, for example, the B-axis cutter head 11
When B is behind the A-axis cutter head 11A, the B-axis cutter head 11B is controlled by the inverter units 13-1 to 13-3 so as to catch up with the A-axis cutter head 11A, and the B-axis cutter head 11B advances too much. , The B-axis cutter head 11B is controlled to be slow. In this way, even if the inverter unit is provided in only one of the cutter heads, the synchronized state of both cutter heads can be maintained.

Although the above description is directed to a case where two shield machines are used, even when three or more shield machines are used, one cutter head is driven by a general-purpose motor, and the rest is driven by a motor controlled by an inverter unit. Good.

[0016]

According to the present invention, one of a plurality of cutter heads in a multiple shield machine can be driven by a general-purpose motor having no inverter unit, so that a drive control device can be provided without deteriorating the performance as a shield machine. Can be simple. For this reason, the installation space for the control device can be significantly reduced, which is very effective in a shield machine in which the installation space is a problem.

In addition, since the shield machine is used in a place where the environment is poor, the number of inverter units is small, the failure occurrence rate is reduced, and the reliability is improved.

Further, since the general-purpose motor side is almost unnecessary for maintenance, the operation is simplified accordingly.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a multiple shield machine according to the present invention.

FIG. 2 is a diagram showing a configuration of a conventional multiple shield machine.

[Explanation of symbols]

11A, 21A A-axis cutter head 11B, 21B B-axis cutter head 12A-1 to 12A-3, 12B-1 to 12B-3
Motor 14 AC reactor 15 Rectifier circuit 26-1 to 26-3 Clutch

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobutaka Ninomiya 111-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima-Hari Maju Industry Co., Ltd. 1. Sumitomo Heavy Industries, Ltd. Chiba Works (56) References JP-A-4-238996 (JP, A) JP-A-3-125794 (JP, A) JP-B-6-100067 (JP, B2) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) E21D 9/08 E21D 9/06 301

Claims (2)

(57) [Claims] 1. A constant-speed general-purpose motor in which power is directly supplied to one cutter head in a multiple shield machine, and the remaining cutter heads are capable of controlling the rotation speed.
And a cutter head on the general-purpose motor side.
On the other hand, the cutter on the sensorless vector inverter side
In order to keep the head in a synchronized state, the general-purpose motor side speed detection signal is given to the sensorless vector inverter side as a speed command value, and the general-purpose motor side cutter head and the sensorless vector inverter side cutter head are connected. By providing means for detecting an angle deviation and adding the angle deviation to the speed command value as a speed command correction value, only the cutter head on the sensorless vector inverter side is controlled to shift control. Features a multiple shield machine. 2. The multiple shield machine according to claim 1.
A plurality of the general-purpose motors
And each of the remaining cutter heads is
Sensorless vector inverter control with multiple motors
Drive and the speed provided on the output side of one of the general-purpose motors
A speed detection signal from a degree detector as the speed command value,
Each of the plurality of sensorless vector inverters
A multiple shield machine characterized by giving.