WO2016155088A1

WO2016155088A1 - Vertical cylinder sleeve piston ring friction-wear test device

Info

Publication number: WO2016155088A1
Application number: PCT/CN2015/078840
Authority: WO
Inventors: 胡宁宁
Original assignee: 江苏师范大学
Priority date: 2015-04-01
Filing date: 2015-05-13
Publication date: 2016-10-06
Also published as: CN104777001A; CN104777001B; ZA201605861B

Abstract

A vertical cylinder sleeve piston ring friction-wear test device comprises a motor (1) and an oil supply pipe (2), and further comprises a friction force test device (3), a raised holding jaw (5), a piston assembly (6), a positive pressure test device (7), a chuck base (8), an oil storage tank (9) and a heating device (10). A cylinder sleeve to be tested is cut into three test pieces (4) respectively mounted on the holding jaws (5) of a centered electrically powered three-jaw chuck, the raised holding jaws (5) clamping to apply a radial load. A load change between cylinder sleeve piston rings is simulated to test friction and lubricity performance thereof, so as to guide the pairing and selection of a cylinder sleeve piston ring friction pair model.

Description

Vertical cylinder liner piston ring friction and wear test device

Technical field

The invention relates to an engine performance testing device, in particular to a vertical cylinder liner piston ring friction and wear testing device.

Background technique

Cylinder liner piston ring friction pair is the most critical friction pair in the engine. Its friction lubrication performance directly affects the performance of the engine. Therefore, it is of great significance to test the friction pair and lubrication characteristics of the cylinder liner piston ring.

At present, the test methods for the friction and wear performance test of the cylinder liner piston ring mainly include the sample test method, the component simulation test method, the engine bench test method, and the installation test method. The test method of the sample is to test the cylinder liner and the piston ring into a standard sample shape size on a test machine, and the method has a simple structure. The test parameters are easy to control, the repeatability and stability are good, and the test cost is low. However, the test test and the engine operating conditions are too different, and the experimental results are not convincing. The engine bench test method is to assemble the cylinder liner piston ring into the engine gantry, and use the simulated load to perform the ignition test. The advantage is that it is similar to the actual working condition, and the condition is controllable, but the test preparation is complicated, the cycle is long, and the cost is high. The installation test uses the experimental method to test the cylinder liner piston ring machine for actual work. The advantage is that it can be exactly the same as the actual working condition, but the test cycle and cost are greatly increased.

Summary of the invention

OBJECT OF THE INVENTION In order to overcome the deficiencies in the prior art, the present invention provides a friction and wear test device for a piston ring of a vertical cylinder liner, which is tested by a piston to test the movement of the test piece to be tested, test pressure and friction, and can be used for various materials. At the same time, the load change between the piston rings of the cylinder liner is tested to test the friction and lubrication performance, thereby guiding the pairing and selection of the piston ring friction pairs of the cylinder liner, and solving the deficiencies of the prior art.

Technical Solution: In order to achieve the above object, the technical solution adopted by the present invention is:

A vertical cylinder liner piston ring friction and wear test device, comprising a motor and an oil supply pipe; characterized by comprising a friction test device, a heightening jaw, a piston assembly, a positive pressure test device, a chuck base, an oil groove and heating Device

The heightening claw is fixed on the chuck base in an adjustable manner, and the cylinder sleeve test piece to be tested is floating on the heightening claw, and the chuck base corresponding to the position of the fixed cylinder sleeve test piece is penetrated An oil leakage passage, an end of the oil leakage passage is provided with an oil groove; the heating device is wrapped on the heightening claw;

The piston assembly is coupled to the motor, and the cylinder liner test member clamps the piston assembly; the piston assembly includes a piston ring that is inserted into the groove of the outer wall of the piston;

The friction testing device includes a tensioning pressure sensor, a tensioning rod and a connecting member; one end of the connecting rod is connected to the upper end of the cylinder sleeve test piece, and the other end is connected to the tensioning rod; the tensioning rod is connected to the tensioning pressure sensor;

The bottom of the heightening claw is provided with a positive pressure measuring device, wherein the positive pressure measuring device comprises a pressure sensor, a pressing rod and a guiding track; the pressing rod penetrates the heightening claw in the direction of the guiding rail to expose the heightening claw A pressure sensor is provided on one section.

The linear motor drives the piston assembly to move up and down, and drives the test piece of the cylinder sleeve to be tested placed on the claw to generate motion, generating friction. At the same time, due to the up and down movement of the cylinder test piece, a positive pressure is generated on the pressure bar at the bottom of the claw. The heating unit can be heated to test for friction and pressure in different environments.

Further, the heightening jaw is a three-jaw chuck; the three-jaw chuck includes three jaws evenly arranged along the circumference. With the three-jaw chuck, the friction and wear performance test of the three materials can be carried out at the same time, which greatly saves the experimental cycle.

Further, a temperature control system is included; the temperature control system includes the heating device, a temperature sensor, and a temperature control device; the temperature sensor is located on a side of the cylinder liner test piece that contacts the claw; and the temperature control device is coupled to the heating device;

Further, the heating device is an electric resistance furnace.

Beneficial effects:

1) The actual parts of the cylinder liner piston ring are tested by the whole piston piston ring test method, which increases the reliability of the test than the sample test method. The vertical installation of the cylinder liner piston ring friction pair is compared with the horizontal type. The influence of the gravity factor on the test results more realistically simulates the working conditions of the actual cylinder liner piston.

2) The linear motor is used to replace the traditional crank slider mechanism, which eliminates the complicated transmission mechanism, reduces the system failure rate, and improves the stability of the system. The linear motor can simulate the actual engine speed, the stroke length is adjustable, the operation is stable, and it is easy to install and save space.

3) The loading device is an electric three-jaw chuck. The positive pressure control is convenient and stable, and the three-jaw chuck is loaded with positive pressure in three directions.

4) The temperature control system of the testing machine can simulate the friction ring of the cylinder liner piston ring which realizes various complicated working conditions. Increased the diversity of trials.

5) The oil supply pipe of the testing machine is matched with the oil tank and other lubrication methods to enable the test machine to achieve dry and wet friction, and provide samples for oil testing.

6) The measuring machine measures the friction and positive pressure away from the heating center, which eliminates the influence of the resistance furnace heating on the sensor measurement results.

7) The cylinder liner test pieces with different materials on the three jaws can simultaneously test the friction and wear performance of the three materials. Significant savings in the cycle of the experiment.

DRAWINGS

Figure 1 shows the structure and working principle of the device

Figure 2 is a top view of the three-jaw chuck

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the present invention provides a vertical cylinder liner piston ring friction and wear test device, and the specific numbers are as follows: linear motor 1, lubricating oil supply pipe 2, friction force measuring device 3 (including tensile force) Sensor 3.1, tension rod 3.2, connecting piece 3.3), cylinder test piece 4, heightening claw 5, piston assembly 6 (including piston 6.1, piston ring 6.2), positive pressure measuring device 7 (including pressure sensor 7.1, pressure) Rod 7.2, guide rail 7.3), chuck base 8, oil sump 9, and heating device 10.

A vertical cylinder liner piston ring friction and wear test device, comprising a motor and an oil supply pipe; characterized in that it comprises a friction test device 3, a heightening claw 5, a piston assembly 6, a positive pressure testing device 7, a chuck base 8. Oil tank 9 and heating device 10;

The heightening claw 5 is fixed on the chuck base 8 in an adjustable manner, and the cylinder liner test piece 4 to be tested is floated on the heightening claw 5, corresponding to the card position of the fixed cylinder sleeve test piece 4. An oil leakage passage is formed in the disk base 8 , and an oil groove 9 is disposed at an end of the oil leakage passage; the heating device 10 is wrapped on the heightening claw 5;

The piston assembly 6 is connected to a motor, where the linear motor uses a voice coil motor. The cylinder liner test piece 4 holds the piston assembly 6; the piston assembly 6 includes a piston ring 6.2 that is inserted into the groove of the outer wall of the piston;

The friction testing device 3 includes a tensioning pressure sensor 3.1, a tensioning rod 3.2 and a connecting member 3.3; one end of the connecting rod 3.3 is connected to the upper end of the cylinder liner test piece 4, and the other end is connected to the tensioning rod 3.2; Pressure Sensor;

The bottom of the heightening claw 5 is provided with a positive pressure measuring device 7, which comprises a pressure sensor 7.1, a pressing rod 7.2 and a guiding rail 7.3; the pressing rod 7.2 runs through the heightening card along the guiding rail 7.3 A pressure sensor 7.1 is disposed on a portion of the claw 5 that exposes the elevation claw 5.

Further, the heightening claw 5 is a three-jaw chuck; the three-jaw chuck includes three claws evenly arranged along the circumference.

Further, a temperature control system is included; the temperature control system includes the heating device 10, a temperature sensor, and a temperature control device; the temperature sensor is located on a side of the cylinder liner test piece 4 that is in contact with the claw; and the temperature control device is connected to the heating Device 10; heating device 10 is a resistance furnace.

Embodiment: According to the type of work, the present invention can be divided into the following parts:

Power and transmission system: Linear motor simulation is used to achieve continuous adjustment of engine speed within a certain range. By This achieves a reciprocating linear motion of the piston piston ring after the cylinder liner is loaded.

Loading system: The loading of the device is performed by the clamping action of the electric three-jaw chuck to the cylinder piston test piece to the piston piston ring assembly. The three-jaw chuck can make the loading force in the three directions the same uniform, simulating the loading of the actual working conditions.

Experimental support system: electric three-jaw chuck, voice coil motor, temperature control device, temperature sensor, heating device, tension pressure sensor, etc. are placed on the bracket, and the bracket system supports the whole device.

Temperature control system: including a resistance furnace as a heating device, the resistance furnace heats the friction ring of the cylinder liner piston ring, the temperature sensor is placed on the outer wall of the cylinder test piece, and the temperature is controlled by the temperature controller.

Lubricating oil supply system: circulating with oil pump, supplying oil to the piston ring friction pair of the cylinder liner through the oil supply pipe 2, lubricating the piston, and excess oil is discharged along the oil leakage pipe sitting at the bottom of the chuck to enter the oil sludge 9, continue to cycle.

Data acquisition system: The tension and friction sensors are used to measure the friction and positive pressure between the piston rings of the cylinder liner. The industrial data acquisition, processing, display and recording are completed by the industrial computer.

The piston ring friction pair of the cylinder liner is placed vertically in the testing machine, and the three-cylinder sleeve test piece is vertically floated on the three claws of the three-jaw chuck, and the pressure sensor is connected with the claw, and the vertical direction three-valve cylinder The test piece is fixed to the tensile pressure sensor. The piston assembly is mounted on the output shaft of the voice coil motor, and the piston piston ring is circumferentially surrounded by a three-cylinder liner test piece mounted on the three-jaw chuck.

Specifically, as shown in FIG. 1, the cylinder liner test piece 4 is vertically floatingly mounted on the heightening claw 5, and the linear motor 1 is connected to the piston assembly 6 through a bolt guide; the cylinder sleeve test piece 4 holds the piston movable component 6 , the piston ring friction pair of the cylinder liner of the test machine.

The cylinder liner test piece 4 is tightened by the heightening claw 5 to the piston assembly 6, here a three-jaw chuck is used. Test pieces of different materials can be mounted on different jaws.

The push lever 7.2 transmits the pressure to the pressure sensor 7.1 through the guide rail 7.3, which records the positive pressure between the liner test piece 4 and the piston ring 6.2.

The linear motor 1 drives the piston movable assembly 6 to reciprocate linearly up and down. Under the action of the friction force, the cylinder liner test piece 4 has a tendency to move up and down. The upper end of the cylinder sleeve test piece is connected with the connecting member 3.3, and the friction force is transmitted to the connecting rod 3.3. On the pull pressure sensor 3.1, the pull pressure sensor 3.1 records the frictional force, and the ratio of the frictional force to the positive pressure is the friction coefficient.

The experimental device of the invention can complete the friction and wear test of the piston ring friction pair of the cylinder liner at any temperature within 300 degrees Celsius, and realize the control of the temperature of the friction pair through the resistance furnace 10 and the temperature control system. The electric resistance furnace 10 is placed outside the heightening claw 5. The test machine measures the friction device 3 and the measuring positive pressure device 7 through the pull (pressure) rods 3.2, 7.2 to the pull (pressure) force sensors 3.1, 7.1, which isolates the sensor and the resistance furnace, and eliminates the resistance of the resistance furnace to the sensor measurement results. Have an impact.

The oil supply system of the testing machine comprises a lubricating oil supply pipe 2, an oil tank 9 and an oil pump. The oil pump pumps the lubricating oil set in the oil tank to the lubricating oil supply pipe 2, and the lubricating oil supply pipe supplies lubricating oil to the friction ring of the cylinder liner piston ring.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

A vertical cylinder liner piston ring friction and wear test device, comprising a motor and an oil supply pipeline; characterized in that it comprises a friction test device (3), a heightening jaw (5), a piston assembly (6), a positive pressure test Device (7), chuck base (8), oil groove (9) and heating device (10);

The heightening claw (5) is fixedly fixed above the chuck base (8), and the cylinder test piece (4) to be tested is floated on the heightening claw (5), correspondingly fixed An oil leakage passage is formed in the chuck base (8) at the position of the cylinder test piece (4), and an oil groove (9) is disposed at an end of the oil leakage passage; the heating device (10) is wrapped in the heightening claw (5) )on;

The piston assembly (6) is connected to a motor, and the cylinder test piece (4) clamps a piston assembly (6); the piston assembly (6) includes a piston ring (6.1) embedded in a groove of an outer wall of the piston (6.2) );

The friction testing device (3) comprises a tensile pressure sensor (3.1), a tensioning rod (3.2) and a connecting member (3.3); one end of the connecting rod (3.3) is connected to the upper end of the cylinder sleeve test piece (4), and the other end is connected and pulled. a pressure bar (3.2); the tension bar (3.2) is connected to the tension pressure sensor;

The bottom of the heightening jaw (5) is provided with a positive pressure measuring device (7), the positive pressure measuring device (7) comprising a pressure sensor (7.1), a pressing rod (7.2) and a guiding track (7.3); The pressing rod (7.2) penetrates the raising claw (5) in the direction of the guiding rail (7.3), and a pressure sensor (7.1) is disposed on a section exposing the heightening claw (5).
A vertical cylinder liner piston ring friction and wear test apparatus according to claim 1, wherein said heightening claw (5) is a three-jaw chuck; and the three-jaw chuck comprises three uniform circumferences Arranged jaws.
A vertical cylinder liner piston ring friction and wear test apparatus according to claim 2, comprising a temperature control system; said temperature control system comprising said heating device (10), a temperature sensor, and a temperature control device The temperature sensor is located on a side of the cylinder liner test piece (4) that is in contact with the claw; the temperature control device is connected to the heating device (10);
A vertical cylinder liner piston ring friction and wear test apparatus according to claim 3, wherein said heating means (10) is an electric resistance furnace.