CN112782024B - A friction and wear test device for self-adaptive contact of bearing pads - Google Patents

Abstract

The invention discloses a friction and wear test device with self-adaptive contact of bearing bushes, which relates to the field of test equipment for friction and wear tests of bearing bushes and mainly comprises a motor, a coupler, a torque sensor, a slip ring, a transmission shaft, a turntable, a linear bearing, a slide bar, a ball rod joint bearing, an expansion sleeve, a radial joint bearing, a bearing bush clamp, a triangular block, a force transmission plate, a cylinder and the like. The ring sample and the bearing bush sample in the device belong to sliding friction. The ring sample and the bearing bush sample are in full-time stable contact by adding the self-adaptive contact device, the eccentric wear phenomenon is overcome, and the accuracy of the friction and wear test result is improved; the spring is additionally arranged at the triangular block of the bearing bush lifting clamp, so that the stability of the device during loading and unloading is improved; the oil outlets are formed in different height positions of the bearing bush clamp, so that the adaptability of a friction wear test under various amounts of lubricating oil is improved; the easy assembly and green economy of the test apparatus are improved by simplifying the apparatus and reducing the volume.

Description

A friction and wear test device for self-adaptive contact of bearing pads

technical field

The invention relates to the field of test equipment for friction and wear of bearing pads, in particular to a friction and wear test device for adaptive contact of bearing pads.

Background technique

As the key component of the sliding bearing, the bearing bush rotates with the journal surface during the working process. Form a lubricating film between the friction pairs by means of oil lubrication, etc., so as to achieve the purpose of drag reduction and wear resistance, and are widely used in power equipment such as diesel engines.

In order to meet the needs of social development, bearing bushes are facing increasingly severe working conditions such as high temperature, high speed and high pressure. Especially in the start-up stage of the equipment, many problems arise immediately, such as insufficient lubricant supply and excessive impurities, which may lead to failure phenomena such as gluing and other direct contact between the journal and the bearing bush. Therefore, based on simulating actual working conditions, it is particularly important to accurately detect the friction and wear performance of the bearing surface.

At present, there are many types of friction and wear testing machines, but there are still few testing machines that can perform friction tests on the surface of bearing pads, especially the testing machines that can overcome the eccentric wear of bearing pad samples during the test process are even more scarce. The invention patent with the patent number of 200810021099.8 provides a journal bearing pad tribological performance testing machine that uses weights and levers to load. Although it can simulate the actual working conditions, it may be due to the manufacturing error of the sample and the assembly of the device during the test. The error leads to eccentric wear on the surface of the bearing bush, which seriously affects the accuracy of the experimental data. The invention patent with the patent number of 201811374603.2 provides a bearing pad abrasive wear test machine, which can quickly detect the embedding of the bearing pad in different abrasive particles and different concentrations, but the eccentric wear of the bearing pad during the test will seriously affect its detection. accuracy. Similarly, the invention patent with the patent number of 201610848827.7 provides a device for quickly detecting the friction coefficient of the bearing pad and the journal under various working conditions, and then investigates the embedded performance, but it does not solve the eccentric wear during the test of the bearing pad sample question.

Contents of the invention

The technical problem to be solved by the present invention is to provide a friction and wear test device with self-adaptive contact of the bearing pad, which can solve the problems of eccentric wear of the bearing pad sample during the friction and wear test in the prior art.

The present invention is realized through the following technical solutions:

A friction and wear test device for self-adaptive contact of bearing pads, wherein the output shaft of the motor is connected to a left coupling, the torque sensor is arranged between the left coupling and the right coupling, and the right coupling is connected to the left end of the main shaft, The middle part of the main shaft is fixed on the support plate through the bearing seat and the motor seat. The turntable is set on the right side of the bearing seat and is fixedly connected with the main shaft. The right end of the main shaft is connected with a radial joint bearing, and the outer side of the radial joint bearing is There is an expansion sleeve, and the outer side of the expansion sleeve is connected with a ring sample; a linear bearing is fixed on the turntable, and a sliding rod is slidably arranged in the linear bearing, and the right end of the sliding rod is connected with a ball joint bearing. The right end of the ball joint bearing is connected to the expansion sleeve; the bearing pad sample is fixed by the bearing pad clamp, and the bearing pad sample and the ring sample form a friction pair, and the cylinder drives the bearing pad clamp to move to adjust the gap between the bearing pad sample and the ring sample. radial pressure.

Preferably, it also includes a slip ring and a stopper, a slip ring is arranged on the main shaft between the right coupling and the bearing seat, the lower end of the stopper is connected to the backing plate of the bearing seat, and the upper end of the stopper is connected to the slip ring Used to limit the rotation of the slip ring, the bearing seat backing plate is fixed on the support plate.

Preferably, the bearing pad fixture includes a retaining pin, an oil inlet, an oil outlet, a locking fixture, an axial positioning groove, a circumferential positioning groove, a left sealing plate and a right sealing plate, the bearing pad clamp is cylindrical, and An annular axial positioning groove is arranged on the outer peripheral surface, an oil inlet is arranged on the upper part of the axial positioning groove, an oil outlet is arranged on the lower part of the cylinder, and a circumferential positioning groove is arranged on the outer surface of the lower part of the cylinder, which is aligned with the circumferential direction. A locking fixture and a stop pin are arranged on the opposite inner wall of the positioning groove, and the bearing bush sample is fixed between the locking fixture and the stop pin. The two ends of the bearing bush fixture are respectively fixed with a left sealing plate and a right sealing plate.

Preferably, three oil outlets are provided at different heights in the circumferential direction of the bearing pad fixture for adjusting the amount of lubricating oil in the bearing pad clamp.

Preferably, it also includes a triangular block, a force transmission plate, a spring and a positioning block, the positioning block is arranged in the middle of the force transmission plate, and it is used to cooperate with the circumferential positioning groove to limit the circumferential movement of the bearing pad clamp; The two sides of the positioning block on the force plate are respectively provided with two grooves, and two triangular blocks are respectively slidingly arranged in the two grooves, and a spring is arranged between the triangular block and the force transmission plate, and the spring is that the triangular block moves in the groove The action force is provided, and the triangular block cooperates with the axial positioning groove to limit the axial movement of the bearing pad clamp.

Preferably, the lower end of the force transmission plate is connected to two guide posts, and the guide posts pass through the guide sleeve connected to the support plate; one end of the cylinder is connected to the force transmission plate, and the other end of the cylinder is fixed on the bottom plate.

Preferably, screw buttons are respectively provided on the left and right sides of the force transmission plate, and the screw buttons are threadedly connected with the force transmission plate, and one end thereof is fixed to the spring for adjusting the tightness of the spring.

The beneficial effects of the present invention are:

1. An adaptive contact device is added during the bearing pad friction and wear test, which can make the bearing pad sample and the ring sample realize stable full-time self-adaptive contact. It effectively overcomes the eccentric wear phenomenon of the bearing pad sample during the test process caused by the manufacturing and assembly errors of the bearing pad sample and the ring sample, and improves the accuracy of the test results;

2. The bearing fixture is supported by the triangular block and the spring assembly. The triangular block moves up and down with the platform to adjust the distance, so that the support for the fixture can be maintained during loading and unloading.

3. The bearing pad fixture is equipped with multiple oil outlets at different heights, which improves the universality of the testing machine for different lubricating oil quantities. In addition, the multi-location design of the bearing pad fixture is conducive to improving the stability of the test process; the ease of assembly of the test device is improved by simplifying the device and reducing the volume.

Description of drawings

Fig. 1 is the structural diagram that device of the present invention does not contain sealing plate;

Fig. 2 is a structural diagram of the self-adaptive contact device for bearing pad samples of the present invention;

Fig. 3 is a structural diagram of the bearing pad clamp of the present invention;

Fig. 4 is a structural diagram of the force transmission plate of the present invention;

Fig. 5 is a structural diagram of the device of the present invention including a sealing plate.

In the figure: 1-base plate; 2-support plate; 3-motor seat; 4-motor; 5-left coupling; 6-torque sensor; 7-right coupling; 8-slip ring; 9-limiter ;10-bearing backing plate; 11-bearing seat; 12-main shaft; 13-turntable; 14-linear bearing; 15-slider; 16-ball joint bearing; 20-bearing sample; 21-positioning block; 22-bearing fixture; 22-1-axial positioning groove; 22-2-oil inlet; 22-3-oil outlet; 22-4- Locking fixture; 22-5-circumferential positioning groove; 22-6-stop pin; 23-triangular block; 24-spring; 25-force transmission plate; 26-cylinder; 27-supporting plate; -Guide sleeve; 30-left sealing plate; 31-right sealing plate.

detailed description

As shown in Figure 1 and Figure 2, a friction and wear test device for self-adaptive contact of bearing pads is mainly composed of a motor 4, a left coupling 5, a right coupling 7, a torque sensor 6, a slip ring 8, and a limiter 9 , bearing seat 11, bearing backing plate 10, transmission shaft, turntable 13, linear bearing 14, slide rod 15, ball joint bearing 16, expansion sleeve 18, radial joint bearing 19, bearing bush fixture 22, triangular block 23, force transmission Plate 25, cylinder 26 and supporting plate 27 constitute. The motor 4 is connected with the support plate 2 through the motor base 3, and the support plate 2 is fixed on the base plate 1; the left end of the left coupling 5 is connected to the output shaft of the motor 4 through a key, and the right end of the left coupling 5 passes through Screwed to the left end of the torque sensor 6; the left end of the right shaft coupling 7 is threaded to the right end of the torque sensor 6, and the right end of the right shaft coupling 7 is connected to the left end of the main shaft 12, in order to realize the output of the measurement signal, in the right coupling A slip ring 8 is arranged on the main shaft 12 between the shaft device 7 and the bearing housing 11 . The lower end of the limiter 9 is connected to the bearing base plate 10, and the upper end of the limiter 9 is connected to the slip ring 8 to limit the rotation of the slip ring 8; It is connected to the radial joint bearing 19; the radial joint bearing 19 is externally connected with an expansion sleeve 18, and the expansion sleeve 18 is externally connected with a ring sample 17; the linear bearing 14 is fixed on the turntable 13, and the linear bearing 14 The transmission direction is parallel to the axial direction of the main shaft 12, the left end of the slide bar 15 is matched with the linear bearing 14, and the right end of the slide bar 15 is connected to the left end of the ball joint bearing 16 through threads; the right end of the ball joint bearing 16 is threaded Connected to the expansion sleeve 18; the main shaft 12, the turntable 13, the linear bearing 14, the slide rod 15, the ball joint bearing 16, the expansion sleeve 18, and the radial joint bearing 19 constitute a set of space between the bearing bush sample and the ring sample. A self-adaptive contact device; the self-adaptation of the bearing pad is to overcome the eccentric wear phenomenon of the bearing pad sample during the test process caused by errors in the processing of the test sample and the assembly of the testing machine.

As shown in Figure 3, the bearing bush fixture 22 is composed of a stop pin 22-6, an oil inlet 22-2, an oil outlet 22-3, a locking fixture 22-4, an axial positioning groove 22-1, and a circumferential positioning The groove 22-5, the left sealing plate 30 and the right sealing plate 31 are formed. The bearing pad fixture 22 is cylindrical, and an annular axial positioning groove 22-1 is arranged on its outer peripheral surface. The axial positioning groove 22-1 The upper part of the cylinder is provided with an oil inlet 22-2, and the lower part of the cylinder is provided with three oil outlets 22-3 with different heights for adjusting the amount of lubricating oil in the bearing fixture 22, and the outer surface of the lower part of the cylinder is provided with circumferential positioning Groove 22-5, a locking fixture 22-4 and a stop pin 22-6 are arranged on the inner wall surface opposite to the circumferential positioning groove 22-5, and the bearing bush sample 20 is fixed on the locking fixture 22-4 and the stop pin 22-6. 6, the two ends of the bearing pad clamp 22 are respectively fixed with a left sealing plate 30 and a right sealing plate 31, and oil retaining is also an important function of the bearing pad clamp.

As shown in Figure 4, it also includes a positioning block 21, a triangular block 23, a spring 24 and a force transmission plate 25, the positioning block 21 is arranged in the middle of the force transmission plate 25, and it is used to cooperate with the circumferential positioning groove 22-5 To limit the circumferential movement of the bearing pad fixture 22; the two sides of the positioning block 21 on the force transmission plate 25 are respectively provided with two grooves, and two triangular blocks 23 are respectively slidingly arranged in the two grooves, and the triangular blocks 23 and A spring 24 is arranged between the force transmission plates 25 to provide force for the movement of the triangular block 23 in the groove, and the triangular block 23 cooperates with the axial positioning groove 22 - 1 to limit the axial movement of the bearing pad clamp 22 . The lower end of the force transmission plate 24 is connected to two guide posts 28, and the guide posts 28 pass through the guide sleeve 29 connected to the supporting plate 27; one end of the cylinder 26 is connected to the force transmission plate 24, and the other end of the cylinder 26 is fixed on the bottom plate 1 On, when the cylinder 26 was not working, the force transmission plate 25 fell on the supporting plate 27.

Before the test, the oil outlet pipe of the oil pump is connected to the oil inlet 22-2, and the appropriate amount of lubricating oil is selected according to the test plan, and then oil outlets 22-2 with different heights are selected. Then, the ring sample 17 is installed by adjusting the expansion sleeve 18, and the bearing bush sample 20 is installed by using the positioning function of the stop pin 22-6 and the locking function of the locking fixture 22-4. Then the left sealing plate 30 and the right sealing plate 31 are connected to the left and right ends of the bearing bush fixture 22 to carry out the oil retaining seal. Before the test starts, the bearing pad fixture 22 is stably supported by the triangular block 23 . After the air cylinder is ventilated, the force transmission plate 25 is loaded upwards, and the two triangular blocks 23 are automatically opened outwards. The positioning block 21 is in contact with the circumferential positioning groove 22-5 of the bearing pad fixture 22, thereby loading the bearing pad sample 20. The motor 4 sequentially transmits the torque to the main shaft through the left coupling 5, the torque sensor 6 and the right coupling 7, the main shaft 12 transmits the torque to the turntable 13 through the key, and the turntable 13 sequentially transmits the torque through the linear bearing 14, the slide bar 15, The ball joint bearing 16 and the expansion sleeve 18 are transferred to the ring sample 17 . During the test, the bearing pad sample will be tilted to a certain extent. At this time, the ring sample will automatically adjust its position to keep it in stable contact with the bearing pad sample, so as to overcome the eccentric wear phenomenon.

After the end of the test, the force transmission plate 25 descends, and at the same time, the two triangular blocks 23 automatically shrink inward to ensure the working stability of the bearing pad fixture 22.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technology of the present invention Any equivalent replacement or change of the scheme and its inventive concepts shall fall within the protection scope of the present invention.

Claims (7)

1. A friction and wear test device for self-adaptive contact of bearing pads, characterized in that the output shaft of the motor (4) is connected with a left coupling (5), and the torque sensor (6) is arranged between the left coupling (5) and Between the right coupling (7), the right coupling (7) is connected to the left end of the main shaft (12), and the middle part of the main shaft (12) is fixed on the support plate (2) through the bearing seat (11) and the motor seat (3). ), the turntable (13) is set on the right side of the bearing seat (11), which is fixedly connected with the main shaft (12), and the right end of the main shaft (12) is connected with a radial joint bearing (19), and the radial joint bearing ( The outer side of 19) is connected with an expansion sleeve (18), and the outer side of the expansion sleeve (18) is connected with a ring sample (17); the linear bearing (14) is fixed on the turntable (13), and the linear bearing (14) ) is slidably provided with a slide bar (15), the right end of the slide bar (15) is connected to a ball joint bearing (16), and the right end of the ball joint bearing (16) is connected to the expansion sleeve (18); The bearing pad sample (20) is fixed by the bearing pad clamp (22), the bearing pad sample (20) and the ring sample (17) form a friction pair, and the cylinder (26) drives the bearing pad clamp (22) to move to adjust the bearing pad sample (20) and the radial pressure between the ring sample (17). 2. A friction and wear test device for bearing bush adaptive contact according to claim 1, characterized in that it also includes a slip ring (8) and a stopper (9), and the right coupling (7) and the bearing A slip ring (8) is provided on the main shaft (12) between the seats (11), the lower end of the limiter (9) is connected to the bearing base plate (10), and the upper end of the limiter (9) is connected to the slip ring ( 8) It is used to limit the rotation of the slip ring (8), and the bearing base plate (10) is fixed on the support plate (2). 3. The friction and wear test device for self-adaptive contact of bearing pads according to claim 1, characterized in that, the bearing pad fixture (22) includes a stop pin (22-6), an oil inlet (22-2), Oil outlet (22-3), locking fixture (22-4), axial positioning groove (22-1), circumferential positioning groove (22-5), left sealing plate (30) and right sealing plate (31 ), the bearing pad fixture (22) is cylindrical, and an annular axial positioning groove (22-1) is provided on its outer peripheral surface, and an oil inlet ( 22-2), the oil outlet (22-3) is set at the lower part of the cylinder, the outer surface of the lower part of the cylinder is provided with a circumferential positioning groove (22-5), and the inner wall surface opposite to the circumferential positioning groove (22-5) A locking jig (22-4) and a stop pin (22-6) are arranged on the top, the bearing bush sample (20) is fixed between the locking jig (22-4) and the stop pin (22-6), and the bearing bush jig ( 22) are respectively fixed with a left sealing plate (30) and a right sealing plate (31). 4. The friction and wear test device for self-adaptive contact of bearing pads according to claim 3, characterized in that, the oil outlet (22-3) is provided with three , used to adjust the amount of lubricating oil in the bearing fixture (22). 5. A friction and wear test device for self-adaptive contact of bearing pads according to claim 3, characterized in that it also includes a triangular block (23), a force transmission plate (25), a spring (24) and a positioning block (21) , the positioning block (21) is arranged in the middle of the force transmission plate (25), which is used to cooperate with the circumferential positioning groove (22-5) to limit the circumferential movement of the bearing pad clamp (22); the force transmission plate (25) There are two grooves on both sides of the positioning block (21) mentioned above, and two triangular blocks (23) are respectively slid in the two grooves, and the connection between the triangular block (23) and the force transmission plate (25) A spring (24) is arranged between them, and the spring (24) provides force for the movement of the triangular block (23) in the groove, and the triangular block (23) cooperates with the axial positioning groove (22-1) to limit the bearing shell The movement of the clamp (22) in the axial direction. 6. A friction and wear test device for self-adaptive contact of bearing pads according to claim 5, characterized in that, the lower end of the force transmission plate (25) is connected to two guide posts (28), and the guide posts (28) pass through Be connected to the guide sleeve (29) on the supporting plate (27); one end of the cylinder (26) is connected with the force transmission plate (25), and the other end of the cylinder (26) is fixed on the base plate (1). 7. A friction and wear test device for self-adaptive contact of bearing pads according to claim 5, characterized in that, the left and right sides of the force transmission plate (25) are respectively provided with screw buttons, and the screw buttons are connected with the force transmission plate The plate (25) is threadedly connected, and one end thereof is fixed with the spring (24) for adjusting the tightness of the spring (24).

Images