JPH0833102B2 - Cylinder liner and piston ring wear detector - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wear detection device applied to a piston ring and a cylinder liner of a diesel engine.

[Conventional technology]

In a diesel engine, particularly a large marine diesel engine, detection of wear during operation of a piston ring (hereinafter referred to as a ring) and a cylinder liner (hereinafter referred to as a liner) has become an important issue as a means for achieving long-term non-opening of a piston. .

FIG. 8 and FIG. 9 show the structure of a conventional oil collecting device for detecting wear of rings and liners.

In the figure, 1 is a liner, 2 is a piston, 3 is a ring,
Reference numeral 4 is a scavenging port of the liner, 5 is an oil receiver attached to the lower end of the liner 1, 6 is an oil conduit connecting the oil receiver 5 and the oil collecting container 7, and 7 is an oil collecting container.

Further, 8 is a hole for collecting oil, 9 is a hole 8 and a collecting container 7.
It is an oil conduit that connects to.

The abrasion powder generated on the sliding surface between the ring 3 and the liner 1 enters the lubricating oil and is collected by the oil receiver 5 provided at the lower end of the liner 1 as shown in FIG. Or liner 1
The oil is collected from an oil hole 8 provided slightly above the scavenging port 4 and stored in an oil collecting container 7.

The oil collected as described above can be analyzed by spectroscopic analysis, etc. to determine the amount of wear and the cause of wear of iron and the acidity and pH.
The value is measured. The current situation is to grasp the change over time in wear by repeating such measurement. Such a method has hitherto been widely used as one of methods for evaluating wear without pulling out the piston 2.

[Problems to be solved by the invention]

However, the conventional method has the following problems.

(1) Since oil is collected from relatively well lubricated parts such as the lower end of the liner 1 and the vicinity of the scavenging port 4, information on the most worn parts of the liner (wear amount and acidity, pH)
Value, etc.) is difficult to obtain, and variation in wear is large.

(2) Since oil is collected every time, it is necessary to obtain this by manual analysis such as spectroscopic analysis, which requires labor and time.

The present invention solves the above problems and has the following two objects.

(1) Accurately grasp the wear of the liner and ring and reduce the variation in wear detection.

(2) To save labor and labor by automatically collecting oil from the liner and detecting the amount of wear.

[Means and actions for solving problems]

The present invention is characterized by having the following configuration in order to solve the above problems.

(1) To accurately grasp the wear of the liner and ring,
The oil was collected from above the liner, where the wear of the liner and the ring is relatively high, so that the variation in wear was reduced.

(2) Automatic collection of oil adhering to the surface of the liner, detection of the amount of wear debris, detection of the amount and acidity of wear debris, pH value, cleaning of system pipelines, etc. can be performed automatically online. In addition to having a function, it was equipped with a system that can simultaneously detect the amount of wear debris and the cause, and the acidity and pH value at the same time.

(3) In (1) above, a part of the collected oil is recorded synchronously so that it can be branched and measured for detecting acidity and pH, and the remaining oil for detecting the amount of abrasion powder. Improving the accuracy of each measurement.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram of a ring and liner wear detector of the present invention, FIG. 2 is a schematic sectional view of an automatic oil sampling device, and FIG. 3 is a basic block diagram of wear detection ferrography. The figures respectively show the basic configuration of the wear detecting X-ray apparatus.

In FIG. 1, 1 is a liner, 2 is a piston, 3 is a ring, 8 is a hole for collecting oil, 9 is an oil conduit, 11 is an oil reservoir, 30 is an automatic sampling valve device, 17 is an oil supply pipe, 18
Is an oil and gas separator, 19 is a gas escape hole, 20 is an oil feed pipe that connects the separator 18 and the oil sump 11, 12 is an escape pipe, 13 is an oil stirring device, 14 is a suction pipe, and 15 is a fixed amount feed pipe. Oil pump,
16 is an oil pump, 40 is a wear detector, 48 is a relief pipe,
47 is a lead wire, 49 is an automatic recorder, 21 is a heater, 22 is an oil solvent tank, 23 is a pipe, 24 is a solenoid valve, 25 is a solvent supply pipe, 26 is a solvent supply solenoid valve, 28 is a discharge pipe, 27 is a It is a discharge solenoid valve.

In FIG. 2, 30 is an automatic sampling valve device,
36 is a valve body, 31 is a needle valve, 35 is an electromagnetic coil, 32 is a stopper, 33 is a lead wire, and 34 is a synchronous opening / closing control circuit.

FIG. 3 shows a conceptual diagram of ferrography as the wear detection device 40. In the figure, 41 is a ferrography body, 44 is a magnet, 42 is a light source, 43 and 45 are optical fibers, 46 is a photodetector, and 48 is a photodetector. It is an escape pipe.

FIG. 4 shows an X-ray device as the wear detection device 40,
In the figure, 51 is a sample cell, 52 is an X-ray generator, 53 is an X-ray counter, and 54 is an X-ray. The sample cell 51 is installed between the oil feed pump 16 and the escape pipe 48 in FIG.

The oil collecting hole 8 is formed near the upper side of the liner 1 where the liner 1 and the ring 3 are relatively easily worn. This is because when oil is collected from below the liner 1, abrasion powder above the liner 1 is dispersed in the circumferential direction below the liner 1 as the piston 2 descends, and therefore variations in wear amount measurement easily occur. This is to prevent this.

The oil stirring device 13 is provided with a propeller 13a for stirring and stirs the oil accumulated in the oil sump 11.

In the wear detection system having the above-described structure, the oil containing the wear particles passes through the oil collecting hole 8 above the liner 1 and the oil conduit 9 and enters the automatic sampling valve device 30. In the device 30, as shown in FIG. 2, an electromagnetic coil 35, a valve 31, and a valve body connected by a control circuit 34 and a lead wire 33 that output a valve opening / closing signal in synchronization with the crank angle of the engine. 36, the valve 31 is opened when the piston 2 rises, and oil is sent to the oil feed pump 17. Since the oil collected contains compressed air and gas,
The oil and gas are separated by a separator 18 and the gas is discharged to the outside through a gas escape hole 19. Oil pump 17 is a pipe
It communicates with the solvent tank 22 via 23, the solvent is mixed in the oil at an appropriate timing, and the diluted oil is the oil feed pump.
It is sent to the oil sump 11 by 20.

The solvent is sent to the oil sump 11 from a pipe 25 separately provided from an oil solvent tank 22 by opening and closing an electromagnetic valve 26 at an appropriate timing. In the oil sump 11, a mixture of oil and solvent (which also includes sludge) is stirred by a stirring device 13 having a propeller 13a. oil,
If a mixture of sludge wear powder, etc.
And a fixed amount oil feed pump 15, a fixed amount of oil feed pump 16
Is sent to the wear detection device 40 via.

Incidentally, the oil feed pump 20, the oil sump 11, the suction pipe 14,
The oil pump 16 has an electric heater 21 around each
Is wound, and by raising the temperature of the oil to a certain extent, its fluidity and the separability between sludge and wear particles are improved.

The wear detector 40 comprises a commercially available ferrography device as shown in FIG. 3 or a transmission X-ray device as shown in FIG. 4 (this may be an excitation X-ray device).

The pherography shown in FIG.
When the oil containing the abrasion powder passes through the magnetic field of the magnet 44 provided in 41, the principle of arranging the particles in the order of the size of the abrasion powder is used. Is transmitted to the photodetector 46 through the optical fiber 45, and is displayed and recorded as a wear risk index determined by the size and amount of wear powder.

The X-ray apparatus shown in FIG. 4 emits X-rays 54 from an X-ray generator 52 while passing oil containing abrasion powder through a sample cell 51, a part of which is composed of a transparent wall, and an X-ray counter tube 53. The amount of element that is abrasion powder is quantitatively detected.

The data obtained from the wear detecting device 40 as described above is sent to the automatic recorder 49 via the lead wire 47 and recorded therein. The oil whose wear has been detected is discharged to the outside through the escape pipe 48.

As described above, the oil sampled from above the liner 1 is automatically measured for the amount of wear and recorded. When this is repeated, if abrasion powder remaining in the oil collected last time remains, it will affect the next data and reduce the measurement accuracy. To prevent this, the pipe of each part
20, 14, 16 and oil sump 11 etc. are soaked automatically by oil solvent tank 22, pipes 23, 25, and solenoid valves that are electrically controlled.
It has 24, 26, 27 etc.

 FIG. 5 shows a second embodiment of the present invention.

In the figure, 61 is an electrode 64 inserted in the oil sump 11, a recorder, 62 is a lead wire connecting the electrode 61 and the recorder 64,
Reference numeral 63 is a lead wire that connects the recorder 64 and the wear detection device 40.

In the case of this embodiment, an electrode 61 for measuring the acidity or pH value of oil is provided in the oil sump 11, and the acidity and pH value are recorded by a recorder 64 via a lead wire 62.

That is, in the case of this embodiment, the oil collected from above the liner 1 is automatically recorded with its acidity or pH value and the amount of wear. The other structure is similar to that of the first embodiment, and the same members are designated by the same reference numerals.

 FIG. 6 shows a third embodiment of the present invention.

In the figure, 70 is a suction pipe, 71 is a pump, 72, 74, 78 are solenoid valves, 73 is an oil reservoir for oil analysis, 75 is an electrode provided in the oil reservoir 73, 76 is a lead wire, and 79 is automatic recording. It is total. In this embodiment, the oil remaining in the separator 18 is sent to separate pipe systems, partly for detecting acidity or pH value, and the remaining oil for measuring the amount of wear. To be First, the former is sent to the oil sump 73 for oil analysis by the suction pipe 70 and the pump 71. The oil sump 73 is provided with an electrode 75 for measuring the acidity or pH value of oil, and the electrically measured pH value is recorded via a lead wire 76 by an acidity or pH value recorder 77. .

On the other hand, the latter is sent to the oil sump 11 by the solenoid valve 78 and the oil sending pump 20. To the oil sump 11, a solvent is sent from an oil solvent tank 22 through a solenoid valve 26, and a mixture of oil and solvent (which also includes sludge) is mixed by a stirring device 13 with a propeller. , Stirred.

A mixed amount of oil, sludge, abrasion powder, etc. is sent to the wear detecting device 40 via the oil feed pump 16 by the suction pipe 21 and the constant oil feed pump 15.

The measurement result obtained by the wear detector 40 is sent to the automatic recorder 79 via the lead wire 47. The value measured by the recorder 77 is also recorded in the recorder 79 at the same time.

That is, the automatic recorder 79 simultaneously records the acidity or pH value and the index value indicating the magnitude of wear. FIG. 7 shows pH values, wear index values, abnormal wear zones I and II, and normal wear zones. In the figure, the zone I has a low pH value and a large amount of wear, and it can be seen that this is caused by so-called corrosive wear, and it is necessary to reduce the increase in alkali value and the production of sulfuric acid. In zone II, when the pH value is high and there is a lot of wear, it can be seen that so-called mechanical wear is the cause, and it is necessary to increase the amount of oiling. In short, in the above embodiment, the magnitude of the wear amount and its cause can be grasped simultaneously or independently from the automatically recorded value.

The other structures of the third embodiment are the same as those of the first embodiment, and the same members as those of the first embodiment are designated by the same reference numerals.

[Advantages of the Invention] As described above, according to the present invention, oil is automatically collected from a place where wear of a liner and a ring is relatively likely to occur, and abrasion powder in oil is automatically measured. Since it has a device and also functions as a device that can be automatically cleaned during the repeated measurement, it is possible to measure the wear state of the ring and liner more accurately than the conventional device. Therefore, there is an advantage that the wear situation can be measured without requiring labor.

[Brief description of drawings]

FIG. 1 is an explanatory configuration diagram of a ring and liner wear detection device according to the present invention, FIG. 2 is a schematic sectional view of an automatic oil sampling device, FIG. 3 is a basic configuration diagram of wear detection, and FIG. It is a basic block diagram of a wear detection X-ray apparatus. FIG. 5 and FIG. 6 are corresponding drawings of FIG. 1 showing another embodiment of the present invention, and FIG. 7 is an explanatory view of the wear action. FIG. 8 and FIG. 9 show the structure of a conventional oil collecting device for detecting wear of rings and liners. 1 …… Cylinder liner, 3 …… Piston ring, 8 ……
Sampling hole, 11 …… oil sump, 13 …… oil agitator, 30 ……
Automatic sampling valve device, 40 …… wear detector, 61 ……
Electrodes, 49, 64, 79 ... Recorder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeharu Ono 1-1, Atsunoura-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Laboratory (56) Reference JP-A-61-207809 (JP, A) JP 57-146996 (JP, A)

Claims (4)

[Claims] Claim: What is claimed is: 1. A sampling oil sampled from the inner surface of a cylinder liner is introduced, and an automatic sampling valve device equipped with an on-off valve that opens and closes a sampling oil passage in synchronization with the rotation of an engine; An oil reservoir for accumulating the oil, means for agitating the oil in the oil reservoir, and a wear detection device for quantitatively measuring wear powder in the oil sent from the oil reservoir. Cylinder liner and piston ring wear detector. 2. An automatic sampling valve device provided with an on-off valve for introducing sampling oil sampled from the inner surface of a cylinder liner and opening and closing a sampling oil passage in synchronization with the rotation of an engine, and fed from the sampling valve device. Oil, a means for agitating the oil in the oil sump, a wear detector for quantitatively measuring wear powder in the oil sent from the oil sump, acidity and pH value of the oil A wear detecting device for a cylinder liner and a piston ring, comprising: an electrode for measuring the pressure and a recording device for recording the acidity and the pH value measured by the electrode. 3. An automatic sampling valve device provided with an on-off valve for introducing sampling oil collected from the inner surface of a cylinder liner and opening and closing a sampling oil passage in synchronism with the rotation of an engine, and fed from the sampling valve device. Oil sump for accumulating oil, means for stirring the oil in the oil sump, a wear detector for quantitatively measuring wear powder in the oil sent from the oil sump, and the automatic sampling valve device A cylinder liner and piston wear detection device, comprising: a container in which a part of the oil is branched and stored; and means for detecting the acidity and pH value of the oil in the container. 4. A sampling oil sampled from the inner surface of a cylinder liner is introduced, and an automatic sampling valve device equipped with an on-off valve that opens and closes a sampling oil passage in synchronization with rotation of an engine, and is fed from the sampling valve device. An oil reservoir for accumulating the oil, means for agitating the oil in the oil reservoir, a wear detector for quantitatively measuring wear powder in the oil sent from the oil reservoir, the automatic sampling valve device, A wear detector for a cylinder liner and a piston ring, comprising an automatic cleaning device for cleaning an oil passage member such as an oil sump.