CN102156096A - Test stand for detecting friction performance of self-lubricating oscillating bearing liner - Google Patents

Abstract

The invention relates to a self-lubricating joint bearing liner friction performance detection test bench, including a test bench, a radial loading mechanism and an axial loading mechanism are arranged on the testing bench, and the gap between the radial loading mechanism and the axial loading mechanism is A friction pair is provided, and the friction pair includes a friction ring or a friction tile whose outer peripheral surface is a circular arc surface for reciprocating rotation under the action of a reciprocating rotation driving force, and is used for transmitting the load along the radial direction of the friction ring The friction ring seat of the force, the friction ring seat has a concave arc surface corresponding to the arc surface of the outer circumference of the friction ring or the friction tile, and the concave arc surface of the friction ring seat is in contact with the friction ring. There is a gap between the circular arc surfaces of the ring or the outer circumference of the friction tile for the assembly of the liner to be tested. The axial loading mechanism is connected to the main shaft in transmission, and the radial loading mechanism is connected to the friction ring seat in transmission. The invention solves the situation that the existing joint bearing bench test cannot directly evaluate the pad performance of the joint bearing.

Description

A self-lubricating joint bearing liner friction performance test bench

technical field

The invention relates to performance testing equipment for bearing pads, in particular to a test bed for testing the friction performance of self-lubricating joint bearing pads.

Background technique

At present, aviation aircraft are developing in the direction of high speed, large load, long range and good maneuverability, which requires related bearings to have higher performance and reliability, and self-lubricating joint bearings are a key component in the aviation industry. The advantages and disadvantages of the aircraft have an important impact on the performance and safety of the aircraft. The quality and tribological properties of the liner material in the self-lubricating spherical plain bearing directly determine the performance and life of the self-lubricating spherical plain bearing.

Our country started late in the research of high-speed light-load self-lubricating joint bearings, and there is still a certain gap in the level of related research and application compared with foreign countries. It is even difficult to buy, such as some high-speed and light-load joint bearings. For this reason, my country is currently vigorously developing the research and production of high-speed light-load self-lubricating joint bearings. The liner is a problem that must be solved first in the research and development of self-lubricating spherical plain bearings. After the liner is produced, how to evaluate its tribological performance has become an urgent problem to be solved.

At present, the domestic evaluation method for gasket performance is often through the joint bearing bench test. According to a "high-speed radial reciprocating swing test machine" disclosed in Chinese patent 200820058975.X, the test machine includes a test bench, and the tested joint bearing Embedded in the clamping mechanism arranged on the test bench, the radial direction of the clamping mechanism is provided with a radial loading mechanism for radially loading the spherical plain bearing, and the axial direction of the spherical plain bearing is provided with a reciprocating rotation driving force for the spherical plain bearing The axial loading mechanism of the joint bearing bench test is to directly assess the performance of the joint bearing. Although the use of the liner is simulated, it cannot directly evaluate the performance of the liner. The performance of the joint bearing not only depends on the performance of the liner, It is also closely related to bearing materials, processing and assembly, so it is easy to cause disputes after problems occur, which is not conducive to the progress of research.

Contents of the invention

The purpose of the present invention is to provide a self-lubricating joint bearing liner tribological performance testing test bench, which has solved the situation that the existing joint bearing bench test cannot directly evaluate the performance of the joint bearing liner.

In order to solve the above problems, the technical solution of the present invention is:

A self-lubricating joint bearing liner friction performance detection test bench, including a test bench, a radial loading mechanism and an axial loading mechanism are arranged on the testing bench, and a friction friction is arranged between the radial loading mechanism and the axial loading mechanism pair, the friction pair includes a friction ring or a friction shoe whose outer peripheral surface is an arc surface for reciprocating rotation under the action of a reciprocating rotation driving force, and a friction ring for transmitting a radial loading force along the friction ring. Ring seat, the friction ring seat has a concave arc surface corresponding to the arc surface of the outer circumference of the friction ring or friction tile, the concave arc surface of the friction ring seat and the friction ring or friction There is a gap for assembling the liner to be tested between the circular arc surfaces of the outer circumference of the tiles, the axial loading mechanism is connected to the main shaft by transmission, and the radial loading mechanism is connected to the friction ring seat by transmission.

The friction pair includes a friction ring whose outer peripheral surface is an arc surface for reciprocating rotation under the action of a reciprocating rotation driving force. The friction ring has a tapered hole along its axial direction. The friction pair also includes a For the reciprocating main shaft under the reciprocating driving force, the main shaft is provided with a tapered working section along its axial direction for the anti-rotation fit of the tapered hole of the friction ring.

The friction ring is composed of upper and lower dual rings with tapered grooves connected by flanges.

The axial loading mechanism is an oscillating oil cylinder horizontally arranged on the test bench, the oscillating oil cylinder includes a power output end, and the power output end of the oscillating oil cylinder is connected to the main shaft of the friction pair through a transmission shaft arranged therebetween. The radial loading mechanism is a loading cylinder vertically arranged below the friction sleeve base, and the test bench also includes a hydraulic system for providing hydraulic power to the swing cylinder and the loading cylinder.

The test bench also includes a computer control system for controlling the reciprocating swing of the main shaft around the axis of the main shaft, and the computer control system is connected with the swing oil cylinder through a hydraulic system.

The conical working section of the main shaft is provided with main shaft support seats for the main shaft to rotate and assemble along its axial two sides.

The loading oil cylinder includes a loading oil cylinder piston, and the loading oil cylinder is divided into an upper working area and a lower working area by the loading oil cylinder piston, and the upper working area and the lower working area are respectively provided with an upper oil inlet for hydraulic oil to enter. port and lower oil inlet.

The test bench also includes a temperature control box for adjusting the test temperature. The temperature control box is a rectangular box composed of inner and outer two-layer stainless steel shells, and the inner and outer two-layer stainless steel shells are filled with useful Based on the heat-preserving alumina fiber cotton, a vertical wall of the temperature control box is provided with an air duct that runs through the entire box body, and the air duct is provided with a refrigeration evaporator, a heater and a blower fan. The air fan is arranged on the side relatively outside of the refrigeration evaporator and the heater, and a temperature sensor of the temperature control box is arranged on the top of the temperature control box.

The test bench also includes sensors for detecting working conditions, and the sensors include an angle sensor for detecting the rotation angle of the transmission shaft, a liner temperature sensor for detecting the temperature of the liner and a sensor for detecting the load of the loading cylinder. The pressure sensor, the angle sensor, the pad temperature sensor and the pressure sensor are connected to the computer control system through signal lines.

The beneficial effects produced by the present invention are: when testing, the liner to be tested is placed in the gap between the friction ring and the friction ring seat, and the friction ring can simulate various angles and various frequency reciprocating swing, the friction ring base can simulate a variety of different load conditions under the action of radial loading force. During the test, multiple sets of liners are used for the test under the same working condition. The whole test process does not require the participation of joint bearings. , can avoid errors caused by bearing material, processing and assembly relationship to directly obtain the friction performance of the pad.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is the enlarged view of part I in Fig. 1;

Fig. 3 is a structural schematic diagram of the friction pair in Fig. 1;

Fig. 4 is the left view of Fig. 3;

Fig. 5 is the top view of Fig. 3;

Fig. 6 is a schematic diagram of the assembly of the main shaft and the friction ring in Fig. 1;

Figure 7 is a schematic diagram of the gasket assembly.

Detailed ways

The embodiment is shown in Figures 1-6: the test bench includes a test bench 9, and the test bench 9 includes an axial loading mechanism for providing a reciprocating rotation driving force to the main shaft 5 and an axial loading mechanism for providing a friction ring seat 18. The radial loading mechanism of the loading force, the friction pair is arranged between the axial loading mechanism and the radial loading mechanism, and the friction pair includes a circular outer peripheral surface for reciprocating rotation under the action of the reciprocating rotation driving force Friction ring 13 with arc surface, and friction ring seat 18 for transmitting the loading force along the radial direction of the friction ring. The friction ring seat 18 has a corresponding rotation fit with the arc surface of the outer periphery of the friction ring. The inner concave arc surface, the inner concave arc surface of the friction ring seat 18 and the outer peripheral arc surface of the friction ring 13 are provided with a gap for the assembly of the liner 20 to be tested, and the friction ring has a gap along its axial direction. Tapered hole 17, the friction pair also includes a main shaft 5 for reciprocating rotation under the reciprocating driving force, and the main shaft 5 is provided with a cone for anti-rotation fit with the tapered hole 17 of the friction ring 13 along its axial direction shaped working section 15, the friction ring 13 is composed of upper and lower dual rings with tapered grooves connected by flanges, in other embodiments of the present invention, the friction ring 13 can also be that the upper end is not closed and The friction tile whose outer peripheral surface is an arc surface is used for reciprocating rotation under the action of the reciprocating rotation driving force, and the friction ring seat 18 has an inner concave circle corresponding to the arc surface of the outer periphery of the friction tile. On the arc surface, the friction ring 13 can also be directly replaced by the optical axis, and the friction ring 13 and the main shaft can also be locked by keying. The left main shaft support seat 4 and the right main shaft support seat 6, the main left main shaft support seat 4 and the right main shaft support seat 6 are arranged on the test bench 9 through a support seat 12, in this example, the axial load The mechanism is a swing oil cylinder 3 arranged horizontally on the test bench 9. The swing oil cylinder 3 includes a power output end, and the power output end is connected to the main shaft 5 through the transmission shaft 11 provided therebetween. The radial loading mechanism is The loading cylinder 8 is vertically arranged below the friction sleeve base 18 and is in transmission connection with the friction sleeve base 18. The loading cylinder 8 includes a loading cylinder piston, and the loading cylinder 8 is divided into an upper working area by the loading cylinder piston. and the lower working area, the upper working area and the lower working area are respectively provided with an upper oil inlet and a lower oil inlet for hydraulic oil to enter, and a piston rod is arranged above the piston of the loading cylinder, and the hydraulic pressure acts on one end of the piston. Push the piston rod to move until it contacts the friction ring seat 18 to generate a force. The test bench also includes a hydraulic system 2 for providing hydraulic power to the swing cylinder 3 and the loading cylinder 8. The pressure oil provided by the hydraulic system 2 After passing through the servo valve, the two oil outlets of the servo valve are respectively connected to the upper and lower working areas of the loading cylinder, and different test forces can be obtained according to the pressure difference between the two working areas. The test bench also includes a Temperature control box 7, the temperature control box 7 is a rectangular box composed of inner and outer two-layer stainless steel shells, filled with insulation for heat preservation between the inner and outer two-layer stainless steel shells Alumina fiber cotton, a vertical wall of the temperature control box is provided with an air duct that runs through the entire box, and the described air duct is provided with a refrigeration evaporator, a heater and a blower fan, and the described blower fan is set On the outer side of the refrigeration evaporator and the heater, the heater is composed of resistance wires and ceramic tubes, etc. During the test, the heater is heated, and the fan is driven by the blower installed on the temperature control box 7 to rotate, and the fan rotates to force the temperature The air flow in the control box 7 makes the temperature in the box uniform. The refrigeration evaporator is a cascading compressor refrigeration system. The temperature control box is equipped with a temperature sensor on the top of the temperature control box, and the temperature control box 7 can move freely. , and there is a gap at the corresponding position of the transmission shaft 11 and the loading cylinder 8, no need to add an environmental chamber when testing at room temperature, it can be placed aside, and when high and low temperature tests are required, push the environmental chamber to the transmission shaft 11 on the conical working section 5, so that the surrounding of the conical working section 5 reaches a test environment with uniform temperature. The test bench also includes sensors for detecting working conditions. 11 The angle sensor for the rotation angle, the liner temperature sensor for detecting the temperature of the liner 20 and the pressure sensor for detecting the load of the loading cylinder, the angle sensor, the liner temperature sensor and the pressure sensor are connected to the computer control via signal lines On system 1, the computer control system 1 adopts VB executable program control, and the component 21 in the figure is a water cooling system for cooling the hydraulic system 2. During the test, the liner 20 is first pasted on the arc surface of the friction ring base 18, After compacting and drying, test with the friction ring 13. Several pads 20 samples can be taken to test under different loads and other test conditions are the same; The vibration frequency is different and the other test conditions are the same. It is also possible to take several pads 20 samples to test at different ambient temperatures and the other test conditions are the same.

Claims (9)

1. a self-lubricating knuckle bearing liner frictional behaviour detects testing table, comprise test board, test board is provided with radial loaded mechanism and axial load maintainer, it is characterized in that: be provided with friction pair between described radial loaded mechanism and the axial load maintainer, described friction pair comprises that the outer peripheral face that is used for back and forth rotating under reciprocal rotary driving force effect is the friction ring or the friction tile of arc surface, and be used to transmit friction ring seat along described friction ring loading force radially, described friction ring seat has the interior concaved circular cambered surface that cooperates with the arc surface corresponding rotation of periphery of described friction ring or friction tile, be provided with the gap that is used for liner assembling to be measured between the arc surface of the periphery of the interior concaved circular cambered surface of friction ring seat and friction ring or friction tile, described axial load maintainer is connected with spindle drive, and described radial loaded mechanism and friction ring seat are in transmission connection.

2. self-lubricating knuckle bearing liner frictional behaviour according to claim 1 detects testing table, it is characterized in that: described friction pair comprises that the outer peripheral face that is used for back and forth rotating is the friction ring of arc surface under reciprocal rotary driving force effect, described friction ring axially has taper hole along it, described friction pair also comprises and is used under reciprocal rotary driving force effect the back and forth main shaft of rotation, and described main shaft only revolves the taper work section of cooperation along its taper hole that is axially arranged with the ring that is used to rub.

3. self-lubricating knuckle bearing liner frictional behaviour according to claim 1 detects testing table, it is characterized in that: described friction ring by up and down two have the antithesis ring of boring groove and connect to form by flange.

4. self-lubricating knuckle bearing liner frictional behaviour according to claim 1 detects testing table, it is characterized in that: described axial load maintainer is a horizontally disposed oscillating oil cylinder on the testing table, described oscillating oil cylinder comprises clutch end, the clutch end of described oscillating oil cylinder and the main shaft of friction pair are in transmission connection by the transmission shaft that is provided with therebetween, described radial loaded mechanism is for vertically being arranged at the load cylinder of the below of friction sleeve base, and described testing table also comprises the hydraulic system that is used for providing to oscillating oil cylinder and load cylinder hydraulic power.

5. self-lubricating knuckle bearing liner frictional behaviour according to claim 1 detects testing table, it is characterized in that: described testing table comprises also and is used to control the computer control system of main shaft around the axis reciprocally swinging of main shaft that described computer control system is by hydraulic system and oscillating oil cylinder control linkage.

6. self-lubricating knuckle bearing liner frictional behaviour according to claim 1 detects testing table, it is characterized in that: the taper work section of described main shaft is provided with along its axial both sides and is used for the main shaft support seat that main shaft rotates assembling.

7. self-lubricating knuckle bearing liner frictional behaviour according to claim 4 detects testing table, it is characterized in that: described load cylinder comprises the load cylinder piston, described load cylinder is divided into workspace and following workspace by the load cylinder piston, and the described workspace of going up is used for last oil-in and the following oil-in that hydraulic oil enters with corresponding respectively being provided with in following workspace.

8. self-lubricating knuckle bearing liner frictional behaviour according to claim 1 detects testing table, it is characterized in that: described testing table also comprises the temperature control box that is used to regulate test temperature, the rectangular box that described temperature control box is made up of inside and outside two-layer Stainless Steel Shell, be filled with the alumina fibre cotton that is used to be incubated between the described inside and outside two-layer Stainless Steel Shell, a wall of described temperature control box is provided with the air channel of running through whole box body, be provided with refrigerating evaporator in the described air channel, well heater and blower fan, described blower fan is arranged at the relative outer side with well heater of refrigerating evaporator, and described temperature control box top is provided with the temperature control box temperature sensor.

9. self-lubricating knuckle bearing liner frictional behaviour according to claim 1 detects testing table, it is characterized in that: described testing table also comprises the sensor that is used for the testing situation, described sensor comprises the angular transducer that is used to detect the transmission shaft rotational angle, the liner temperature sensor that is used for the detection pad temperature and the pressure transducer that is used to detect the load cylinder load, and described angular transducer, liner temperature sensor and pressure transducer are connected on the computer control system by signal wire.

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