CN207866493U - The rolling bearing performance experimental rig for loading alternating load based on crank connecting link - Google Patents

Abstract

The utility model relates to a rolling bearing performance test device that can be loaded with alternating loads based on a crank connecting rod. The device includes a worktable, a rotating shaft support mechanism, a rotating shaft, a driving motor and an alternating load loading unit. A block assembly, a first rotating motor and a second rotating motor, a first crank connecting rod transmission loading mechanism is provided between the first rotating motor and the clamping block assembly, a second crank connecting rod is provided between the second rotating motor and the clamping block assembly Rod transmission loading mechanism. Compared with the prior art, in the utility model, the first rotating motor and the second rotating motor can alternately load the rolling bearings in the clamping block assembly through the first crank-connecting rod transmission loading mechanism and the second crank-connecting rod transmission loading mechanism respectively. load, to simulate the real working conditions of dynamic rolling bearings in internal combustion engines, to ensure the accuracy and reliability of rolling bearing performance test results.

Description

Rolling bearing performance test device based on crank connecting rod that can be loaded with alternating loads

technical field

The utility model belongs to the technical field of internal combustion engines and relates to a rolling bearing performance test device based on a crank connecting rod that can be loaded with alternating loads.

Background technique

As power equipment, internal combustion engines have been widely used in many industries such as automobiles, ships, aircraft, tanks, railway locomotives, agricultural machinery, construction machinery, generator sets, etc., and occupy a very important position in the national economy. The internal combustion engine includes several pairs of important friction pairs such as piston-cylinder liner, piston ring-cylinder liner, crankshaft-bearing and cam-tappet. Among them, the crankshaft-bearing includes main bearing and connecting rod bearing (due to the working load of this type of bearing The size and direction of the internal combustion engine change with time, so it is usually called a dynamic load bearing), which is one of the most critical friction pairs of the internal combustion engine. It not only affects the reliability and durability of the internal combustion engine, but also affects the potential for further strengthening of the internal combustion engine.

At present, the main bearings, camshaft bearings and connecting rod big end bearings of automobile engines mainly use sliding bearings, while the camshaft bearings of a few engines use rolling bearings. According to the theory of tribology, the energy loss of rolling friction is about an order of magnitude smaller than that of sliding friction. Under the same working conditions, the friction loss of rolling bearings is much smaller than that of sliding bearings. Therefore, bearing rolling has become an important factor for reducing friction and consumption of engines. try.

The performance and reliability of rolling bearings are the most important performance indicators of rolling bearings, but because there are too many factors affecting the performance of bearings, it is an effective way to conduct rolling bearing performance tests. Bearing test is an important verification process that is indispensable in the bearing design and manufacturing process. Among them, the loading load of the test bearing is an important parameter for the test of the bearing testing machine, and its accuracy directly affects the results of the bearing test. At present, the traditional rolling bearing test device has a single loading characteristic and cannot be loaded with variable loads. In real internal combustion engines, dynamically loaded rolling bearings often work under alternating loads. Therefore, traditional rolling bearing performance test devices cannot perform internal combustion engine loaded rolling bearing tests.

Utility model content

The purpose of this utility model is to provide a rolling bearing performance test device based on a crank connecting rod that can be loaded with alternating loads in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A rolling bearing performance test device based on a crank connecting rod that can be loaded with alternating loads. The rolling bearing includes a bearing inner ring, a bearing outer ring sleeved outside the bearing inner ring, a cage arranged between the bearing outer ring and the bearing inner ring, and multiple bearings. A rolling element evenly arranged on the cage along the circumference of the inner ring of the bearing, the device includes a worktable, a rotating shaft supporting mechanism arranged on the working table, a rotating shaft passing through the rotating shaft supporting mechanism in the horizontal direction, and a set The driving motor on the workbench and connected to one end of the rotating shaft and the alternating load loading unit arranged on the workbench and adapted to the rotating shaft, the alternating load loading unit includes a clamp sleeved on the outside of the rotating shaft The block assembly and the first rotating motor and the second rotating motor which are arranged on the workbench and respectively located on both sides of the clamping block assembly; a first crank connecting rod transmission loading mechanism is arranged between the first rotating motor and the clamping block assembly , the first crank connecting rod transmission loading mechanism includes a first crank connecting rod assembly connected to the first rotating electrical machine and a first spring loading assembly arranged between the first crank connecting rod assembly and the clamp block assembly, said The first crank connecting rod assembly includes a first crank with one end sheathed on the output shaft of the first rotating electrical machine, a first connecting rod arranged at the other end of the first crank, a first piston arranged at one end of the first connecting rod, and a The first guide cylinder on the workbench and matched with the first piston; the second crank connecting rod transmission loading mechanism is provided between the second rotating motor and the clamp block assembly, and the second crank connecting rod transmission loading The mechanism includes a second crank-connecting rod assembly connected to the second rotating electrical machine and a second spring-loaded assembly disposed between the second crank-connecting rod assembly and the clamp block assembly, the second crank-connecting rod assembly includes an end sleeve The second crank that is arranged on the output shaft of the second rotating electric machine, the second connecting rod that is arranged on the other end of the second crank, the second piston that is arranged on one end of the second connecting rod, and the second piston that is arranged on the worktable and Matching second guide cylinder. The first rotating motor drives the first crank to rotate, and then drives the first connecting rod to move. Under the guidance of the first guide cylinder, the first piston reciprocates; the second rotating motor drives the second crank to rotate, and then drives the second connecting rod Movement, under the guidance of the second guide cylinder, the second piston reciprocates. Place the rolling bearing to be tested between the clamping block assemblies and set it on the rotating shaft; the driving motor drives the rotating shaft to rotate, and the first rotating motor and the second rotating motor drive the first spring through the first piston and the second piston respectively. The loading assembly and the second spring loading assembly exert force on the clamping block assembly, thereby implementing alternating load loading on the rolling bearing.

In rolling bearings, the rolling elements are evenly distributed between the bearing inner ring and the bearing outer ring along the circumference of the bearing inner ring through the cage.

Further, the rotating shaft supporting mechanism includes a first supporting assembly and a second supporting assembly arranged side by side on the workbench, and the rotating shaft passes through the first supporting assembly and the second supporting assembly in a horizontal direction. The first support assembly and the second support assembly can support the rotation shaft.

Further, the first support assembly includes a first bearing seat arranged on the workbench and a first auxiliary bearing arranged on the first bearing seat and sleeved on the outside of the rotating shaft, and the second support assembly includes The second bearing seat arranged on the workbench and the second auxiliary bearing arranged on the second bearing seat and sleeved on the outside of the rotating shaft. The first auxiliary bearing and the second auxiliary bearing are arranged side by side on the rotating shaft to support the rotating shaft.

Further, the first auxiliary bearing and the second auxiliary bearing are both rolling bearings.

Further, the clamping block assembly includes a first clamping block and a second clamping block oppositely arranged, and a rolling bearing installation cavity is provided between the first clamping block and the second clamping block. During the test, the rolling bearing to be tested is placed between the first clamping block and the second clamping block.

Further, a temperature sensor is arranged inside the first clamping block.

Further, the first spring loading assembly includes a first spring arranged between the first piston and the first clip block, a first piston connection block arranged between one end of the first spring and the first piston, and a set The first clamp block connection block between the other end of the first spring and the first clamp block; the second spring loading assembly includes a second spring arranged between the second piston and the second clamp block, arranged at The second piston connecting block between one end of the second spring and the second piston and the second clamping block connecting block arranged between the other end of the second spring and the second clamping block. The first rotating motor drives the first piston to reciprocate, thereby causing the first spring to undergo tension or compression deformation, and applies a loading force to the rolling bearing to be tested through the first clamp; the second rotating motor drives the second piston to reciprocate, thereby causing the The second spring undergoes tension or compression deformation, and applies a loading force to the rolling bearing to be tested through the second clamp block.

Further, a coupling is provided between the drive motor and the rotating shaft, and is connected to one end of the rotating shaft through the coupling. The driving motor is connected with the rotating shaft through a coupling, and drives the rotating shaft to rotate.

Furthermore, the said workbench is provided with a torque meter adapted to the rotating shaft.

Further, the device further includes a computer. The computer is respectively electrically connected with the drive motor, the first rotating motor and the second rotating motor to control the corresponding components. The computer controls the rotation of the drive motor so that the rolling bearing to be tested can work at a predetermined speed. In addition, the torque meter and the temperature sensor are also electrically connected to the computer, which can collect signals during the operation of the rolling bearing and monitor the operation status of the rolling bearing.

As a preferred technical solution, the device further includes an oil supply system. The oil supply system is electrically connected with the computer, and the computer controls the oil supply system to realize the oil supply of the rolling bearing.

As a preferred technical solution, the oil supply system includes an oil tank, a quantitative pump, a filter, a pressure sensor and a flow meter. The oil supply port of the oil tank is connected to the quantitative pump and the filter in turn through the oil supply pipeline. The pressure sensor and the flow meter are arranged on the oil supply pipeline, and the oil tank supplies oil to the rolling bearing through the oil supply pipeline.

When the utility model is used in practice, the rolling bearing to be tested is placed between the first clamping block and the second clamping block, and is sleeved on the rotating shaft; the computer controls the driving motor to rotate, so that the rolling bearing runs at a predetermined speed; through The computer controls the rotation angles of the first rotating motor and the second rotating motor, and then controls the tension/compression of the first spring and the second spring. Due to the change of the tension/compression of the first spring and the second spring, the first The spring and the second spring apply forces of different magnitudes and variable directions on the surfaces of the first clamping block and the second clamping block respectively, thereby realizing the alternating load loading of the rolling bearing. At the same time, the computer controls the oil supply during the operation of the rolling bearing through the oil supply system, and the torque meter and temperature sensor can detect the performance of the rolling bearing during operation.

Wherein, a plurality of rolling bearings can be placed between the first clamping block and the second clamping block at the same time, so as to realize the simultaneous testing of multiple rolling bearings.

Compared with the prior art, the utility model has the following characteristics:

1) The first rotating electrical machine and the second rotating electrical machine can apply alternating loads to the rolling bearings in the clamp block assembly through the first crank-connecting rod transmission loading mechanism and the second crank-connecting rod transmission loading mechanism respectively, so as to simulate the dynamic load rolling bearings in the internal combustion engine The real working conditions ensure the accuracy and reliability of the rolling bearing performance test results;

2) Control the rotation angle and time variation of the first rotating motor and the second rotating motor through the computer, convert the rotating motion of the first rotating motor and the second rotating motor into the linear motion of the first piston and the second piston, so as to change The tension or compression of the first spring and the second spring can further control the elastic force of the first spring and the second spring, so as to realize the alternating load loading of the rolling bearing.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the structural representation of alternating load loading unit in the utility model;

Instructions for marks in the figure:

1—computer, 2—drive motor, 3—coupling, 4—torque meter, 5—first bearing housing, 6—oil supply system, 7—alternating load loading unit, 8—first clamping block, 9— Second bearing seat, 10—rotating shaft, 11—second auxiliary bearing, 12—rolling bearing, 13—second clamp block, 14—first auxiliary bearing, 15—worktable, 16—temperature sensor, 17—first rotation Motor, 18—the first piston connecting block, 19—the first spring, 20—the first clamping block connecting block, 21—the second clamping block connecting block, 22—the second spring, 23—the second piston connecting block, 24— The second rotary motor, 25—the first crank, 26—the first connecting rod, 27—the first piston, 28—the first guide cylinder, 29—the second crank, 30—the second connecting rod, 31—the second piston, 32—the second guide cylinder.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the utility model, and the detailed implementation and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

Example:

As shown in Figure 1, the rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads, the rolling bearing 12 includes a bearing inner ring, a bearing outer ring sleeved outside the bearing inner ring, a bearing outer ring and a bearing inner ring The cage between them and a plurality of rolling elements evenly arranged on the cage along the circumference of the inner ring of the bearing, the device includes a worktable 15, a rotating shaft supporting mechanism arranged on the working table 15, and a rotating shaft supporting mechanism along the horizontal direction. The rotating shaft 10 of the mechanism, the driving motor 2 arranged on the workbench 15 and connected to one end of the rotating shaft 10, and the alternating load loading unit 7 arranged on the workbench 15 and adapted to the rotating shaft 10, as shown in the figure As shown in 2, the alternating load loading unit 7 includes a clamping block assembly sleeved outside the rotating shaft 10, and a first rotating motor 17 and a second rotating motor 24 arranged on the workbench 15 and located on both sides of the clamping block assembly; A first crank-link transmission loading mechanism is provided between the first rotating electrical machine 17 and the clamping block assembly, and the first crank-connecting rod transmission loading mechanism includes a first crank-connecting rod assembly that is transmission-connected with the first rotating electrical machine 17 and is arranged on The first spring loaded assembly between the first crank connecting rod assembly and the clip block assembly, the first crank connecting rod assembly includes a first crank 25 with one end sleeved on the output shaft of the first rotating electrical machine 17, and a first crank 25 arranged on the first crank 25 the first connecting rod 26 at the other end, the first piston 27 arranged at one end of the first connecting rod 26, and the first guide cylinder 28 arranged on the workbench 15 and matched with the first piston 27; the second rotating motor 24 and the clamping block assembly are provided with a second crank-link transmission loading mechanism, the second crank-link transmission loading mechanism includes a second crank-link assembly connected to the second rotating electrical machine 24 and a second crank-link assembly The second spring loaded assembly between the rod assembly and the clamp block assembly, the second crank connecting rod assembly includes a second crank 29 with one end sleeved on the output shaft of the second rotating electrical machine 24, and a second crank 29 arranged at the other end of the second crank 29. The second connecting rod 30 , the second piston 31 arranged at one end of the second connecting rod 30 , and the second guide cylinder 32 arranged on the worktable 15 and adapted to the second piston 31 .

Wherein, the rotating shaft supporting mechanism includes a first supporting assembly and a second supporting assembly arranged side by side on the workbench 15 , and the rotating shaft 10 runs through the first supporting assembly and the second supporting assembly along the horizontal direction. The first support assembly includes the first bearing seat 5 arranged on the workbench 15 and the first auxiliary bearing 14 arranged on the first bearing seat 5 and sleeved outside the rotating shaft 10. The second support assembly includes the first auxiliary bearing 14 arranged on the workbench 15 on the second bearing seat 9 and the second auxiliary bearing 11 arranged on the second bearing seat 9 and sleeved on the outside of the rotating shaft 10 . Both the first auxiliary bearing 14 and the second auxiliary bearing 11 are rolling bearings.

The clamping block assembly includes a first clamping block 8 and a second clamping block 13 oppositely arranged, and a rolling bearing installation cavity is provided between the first clamping block 8 and the second clamping block 13 . A temperature sensor 16 is disposed inside the first clamping block 8 .

The first spring loading assembly comprises the first spring 19 arranged between the first piston 27 and the first clamping block 8, the first piston connection block 18 arranged between one end of the first spring 19 and the first piston 27, and a set The first clamp block connection block 20 between the other end of the first spring 19 and the first clamp block 8; the second spring loaded assembly includes a second spring 22 disposed between the second piston 31 and the second clamp block 13 , the second piston connecting block 23 arranged between one end of the second spring 22 and the second piston 31 , and the second clamping block connecting block 21 arranged between the other end of the second spring 22 and the second clamping block 13 .

A coupling 3 is provided between the driving motor 2 and the rotating shaft 10 , and is connected to one end of the rotating shaft 10 through the coupling 3 . A torque meter 4 adapted to the rotating shaft 10 is provided on the workbench 15 .

The device also includes a computer 1 and an oil supply system 6 .

In actual application, two rolling bearings 12 to be tested are placed between the first clamping block 8 and the second clamping block 13, and are sleeved on the rotating shaft 10; the computer 1 controls the driving motor 2 to rotate, so that the rolling bearings 12 are Predetermined rotating speed operation; Control the rotation angle of the first rotating electrical machine 17 and the second rotating electrical machine 24 by computer 1, and then control the extension/compression amount of the first spring 19 and the second spring 22, because the first spring 19 and the second The tension/compression of the spring 22 changes, the first spring 19 and the second spring 22 respectively apply forces of different sizes and directions on the surfaces of the first clamping block 8 and the second clamping block 13, and then realize the rolling bearing 12. Variable load loading. At the same time, the computer 1 controls the oil supply of the rolling bearing 12 during operation through the oil supply system 6 , and the torque meter 4 and the temperature sensor 16 can detect the performance of the rolling bearing 12 during operation.

The above description of the embodiments is for those of ordinary skill in the technical field to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the utility model is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the utility model without departing from the category of the utility model should be within the protection scope of the utility model.

Claims (10)

1. A rolling bearing performance test device that can be loaded with alternating loads based on a crank connecting rod. The rolling bearing (12) includes a bearing inner ring, a bearing outer ring sleeved outside the bearing inner ring, and a bearing outer ring arranged between the bearing outer ring and the bearing inner ring. The cage and a plurality of rolling elements uniformly arranged on the cage along the circumference of the inner ring of the bearing are characterized in that the device includes a workbench (15), a rotating shaft support Mechanism, the rotating shaft (10) that runs through the rotating shaft support mechanism in the horizontal direction, the drive motor (2) that is arranged on the workbench (15) and is connected with one end of the rotating shaft (10), and the drive motor (2) that is arranged on the workbench (15) and an alternating load loading unit (7) adapted to the rotating shaft (10), the alternating loading unit (7) includes a clamp block assembly set outside the rotating shaft (10) and arranged on 15) The first rotating electrical machine (17) and the second rotating electrical machine (24) located on both sides of the clamping block assembly; A first crank connecting rod transmission loading mechanism is provided between the first rotating electrical machine (17) and the clamping block assembly, and the first crank connecting rod transmission loading mechanism includes a first connecting rod transmission connection with the first rotating electrical machine (17). The crank connecting rod assembly and the first spring loaded assembly arranged between the first crank connecting rod assembly and the clamp block assembly, the first crank connecting rod assembly includes an output shaft sleeved on the first rotating electrical machine (17) at one end The first crank (25) on the top, the first connecting rod (26) arranged at the other end of the first crank (25), the first piston (27) arranged at one end of the first connecting rod (26), and the first piston (27) arranged on the workbench (15) the first guide cylinder (28) that is compatible with the first piston (27); A second crank-connecting rod transmission loading mechanism is provided between the second rotating electrical machine (24) and the clamping block assembly, and the second crank-connecting rod transmission loading mechanism includes a second rotating electrical machine (24) transmission-connected. A crank connecting rod assembly and a second spring loaded assembly arranged between the second crank connecting rod assembly and the clamp block assembly, the second crank connecting rod assembly includes an output shaft sleeved on the second rotating electrical machine (24) at one end The second crank (29) on the top, the second connecting rod (30) arranged at the other end of the second crank (29), the second piston (31) arranged at one end of the second connecting rod (30) and the second piston (31) arranged on the workbench (15) and the second guide cylinder (32) that is compatible with the second piston (31). 2. The rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads according to claim 1, wherein the rotating shaft support mechanism includes a first support that is arranged in parallel on the workbench (15) component and the second support component, the rotation shaft (10) runs through the first support component and the second support component along the horizontal direction. 3. The rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads according to claim 2, characterized in that, the first support assembly includes a first bearing seat arranged on the workbench (15) (5) and the first auxiliary bearing (14) arranged on the first bearing seat (5) and sleeved on the outside of the rotating shaft (10), the second support assembly includes the The second bearing seat (9) and the second auxiliary bearing (11) arranged on the second bearing seat (9) and sleeved on the outside of the rotating shaft (10). 4. The rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads according to claim 3, characterized in that, the first auxiliary bearing (14) and the second auxiliary bearing (11) are both rolling bearings . 5. The rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads according to claim 1, wherein the clamp block assembly includes a first clamp block (8) and a second clamp block that are oppositely arranged block (13), a rolling bearing installation cavity is provided between the first clamp block (8) and the second clamp block (13). 6 . The rolling bearing performance testing device based on crank connecting rods capable of loading alternating loads according to claim 5 , wherein a temperature sensor ( 16 ) is provided inside the first clamping block ( 8 ). 7 . 7. The rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads according to claim 5, wherein the first spring loading assembly includes a first piston (27) and a first clamp The first spring (19) between the blocks (8), the first piston connection block (18) arranged between one end of the first spring (19) and the first piston (27), and the first piston connection block (18) arranged on the first spring (19) ) between the other end of the first clamping block (8) and the first clamping block connection block (20); The second spring loading assembly includes a second spring (22) arranged between the second piston (31) and the second clamp block (13), an end arranged at the second spring (22) and the second piston ( 31) between the second piston connecting block (23) and the second clamping block connecting block (21) arranged between the other end of the second spring (22) and the second clamping block (13). 8. The rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads according to claim 1, characterized in that, a coupling is provided between the drive motor (2) and the rotating shaft (10) (3), and is connected with one end of the rotating shaft (10) through a shaft coupling (3). 9. The rolling bearing performance test device based on the crank connecting rod that can be loaded with alternating loads according to claim 1, characterized in that, the workbench (15) is provided with a Torque meter (4). 10. The rolling bearing performance testing device based on the crank connecting rod that can be loaded with alternating loads according to claim 1, characterized in that the device further comprises a computer (1).