CN108254185A - Apply the rolling bearing performance experimental rig of radially alternating load based on crank connecting link - Google Patents

Abstract

The invention relates to a rolling bearing performance test device based on a radial alternating load applied by a crank connecting rod. The device includes a worktable, a rotating shaft support mechanism, a rotating shaft, a driving motor and a radial alternating load loading unit. The unit includes a loading unit bracket, a clamp block assembly, and a pair of crank connecting rod radial loading mechanisms arranged perpendicular to each other on the loading unit bracket. The crank connecting rod radial loading mechanism includes a first rotating motor, a second rotating motor, a first crank A connecting rod assembly, a first spring loaded assembly, a second crank connecting rod assembly, and a second spring loaded assembly. Compared with the prior art, in the present invention, the first rotating electrical machine and the second rotating electrical machine can apply radial alternating loads to the rolling bearings in the clip block assembly through the first spring loading assembly and the second spring loading assembly respectively, so as to simulate the internal combustion engine The real working conditions of rolling bearings with medium dynamic load ensure the accuracy and reliability of the performance test results of rolling bearings.

Description

Rolling bearing performance test device based on radial alternating load applied by crank connecting rod

technical field

The invention belongs to the technical field of internal combustion engines, and relates to a rolling bearing performance test device based on radial alternating load applied by a crank connecting rod.

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, engineering 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.

Contents of the invention

The object of the present invention is to provide a rolling bearing performance test device based on the radial alternating load applied by the crank connecting rod in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

The rolling bearing performance test device is based on the radial alternating load applied by the crank connecting rod. 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 radial alternating load loading unit arranged on the workbench and adapted to the rotating shaft, the radial alternating load loading unit includes a set on the workbench The loading unit bracket on the upper side, the clamp block assembly set on the loading unit bracket and sleeved outside the rotating shaft, and a pair of crank connecting rod radial loading mechanisms arranged perpendicular to each other on the loading unit bracket and compatible with the clamp block assembly , the crank connecting rod radial loading mechanism includes a first rotating motor and a second rotating motor which are arranged on the loading unit bracket and respectively located on both sides of the clamping block assembly, and a first crank connecting rod connected to the first rotating motor for transmission assembly, a first spring-loaded assembly disposed between the first crank-connecting rod assembly and the clamp block assembly, a second crank-connecting rod assembly that is drive-connected to the second rotating electrical machine, and a second crank-connecting rod assembly disposed between the second crank-connecting rod assembly and the clamp block assembly The second spring loading assembly between them; the first crank connecting rod assembly includes a first crank with one end sleeved on the output shaft of the first rotating electrical machine, a first connecting rod set at the other end of the first crank, and a set The first piston at one end of the first connecting rod and the first guide cylinder arranged on the support of the loading unit and matched with the first piston; The second crank on the output shaft, the second connecting rod arranged at the other end of the second crank, the second piston arranged at one end of the second connecting rod, and the second piston arranged on the loading unit bracket and adapted to the second piston guide cylinder. In the crank connecting rod radial loading mechanism, 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 The crank rotates, and then drives the second connecting rod to move, and under the guidance of the second guide cylinder, the second piston reciprocates. The rolling bearing to be tested is placed between the clamping block assemblies, and is sleeved on the rotating shaft; the driving motor drives the rotating shaft to rotate, and the first rotating motor and the second rotating motor in the radial loading mechanism of the two crank connecting rods pass through the second rotating motor respectively. The first piston and the second piston drive the first spring loading assembly and the second spring loading assembly to exert force on the clamp block assembly from four directions, thereby realizing the application of radial alternating loads to 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.

As a preferred technical solution, the end face of the clamp block assembly is square, and the two first spring loading assemblies and the two second spring loading assemblies are respectively located around the clamp block assembly.

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

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 with 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.

In the actual application of the present invention, 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 Control the rotation angles of the first rotating motor and the second rotating motor in the radial loading mechanism of the two crank connecting rods, and then control the stretching/compression of the two first springs and the two second springs, because the first spring and the second spring According to the change of the tension/compression amount, the first spring and the second spring apply forces of different sizes and directions on the surface of the clamp block assembly, thereby realizing the application of radial alternating loads 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 present invention has the following characteristics:

1) The first rotating electrical machine and the second rotating electrical machine can apply radial alternating loads to the rolling bearings in the clamp block assembly through the first spring loading assembly and the second spring loading assembly respectively, so as to simulate the real working conditions of the dynamically loaded rolling bearings in the internal combustion engine Conditions ensure the accuracy and reliability of 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 radial alternating load of the rolling bearing.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the structural schematic diagram of radial alternating load loading unit in the present invention;

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—radial alternating load loading unit, 8—first clamping block, 9—second bearing seat, 10—rotating shaft, 11—second auxiliary bearing, 12—rolling bearing, 13—second clamping block, 14—first auxiliary bearing, 15—worktable, 16—temperature sensor, 17—the first A rotating 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 rotating 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 present invention 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 present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

Example:

As shown in Figure 1, the rolling bearing performance test device based on the radial alternating load applied by the crank connecting rod, 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 radial alternating load loading unit 7 arranged on the workbench 15 and adapted to the rotating shaft 10, As shown in Figure 2, the radial alternating load loading unit 7 includes a loading unit bracket arranged on the workbench 15, a clamp block assembly arranged on the loading unit bracket and sleeved outside the rotating shaft 10, and a pair of mutually perpendicular A crank connecting rod radial loading mechanism arranged on the loading unit bracket and adapted to the clamp block assembly. The crank connecting rod radial loading mechanism includes first rotating motors arranged on the loading unit bracket and respectively located on both sides of the clamp block assembly 17 and the second rotating electrical machine 24, the first crank connecting rod assembly connected with the first rotating electrical machine 17, the first spring loading assembly arranged between the first crank connecting rod assembly and the clamp block assembly, and the second rotating electrical machine 24 the second crank connecting rod assembly connected by transmission and the second spring loading assembly arranged between the second crank connecting rod assembly and the clamp block assembly; The first crank 25 on the shaft, 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 loading unit bracket and corresponding to the first piston 27 The adapted first guide cylinder 28; the second crank and connecting rod assembly includes a second crank 29 with one end sleeved on the output shaft of the second rotating electrical machine 24, a 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 guide cylinder 32 arranged on the loading unit bracket 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 includes the first spring 19 arranged between the first piston 27 and the clamp block assembly, 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 arranged at the second The other end of a spring 19 and the first clamping block connection block 20 between the clamping block assembly; the second spring loading assembly includes the second spring 22 arranged between the second piston 31 and the clamping block assembly, and the second spring The second piston connecting block 23 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 clamping block assembly.

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 speed operation; control the rotation angles of the first rotating motor 17 and the second rotating motor 24 in the radial loading mechanism of the two crank connecting rods through the computer 1, and then control the stretching of the two first springs 19 and the two second springs 22 /compression amount, due to the change of the tension/compression amount of the first spring 19 and the second spring 22, the first spring 19 and the second spring 22 exert different sizes and variable directions on the surface of the clamp block assembly, thereby realizing The rolling bearing 12 is applied with radial alternating load. 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 descriptions of the embodiments are for those of ordinary skill in the art to understand and use the invention. 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 effort. Therefore, the present invention is not limited to the above-mentioned embodiments. Improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.

Claims (10)

1. applying the rolling bearing performance experimental rig of radially alternating load based on crank connecting link, rolling bearing (12) is including bearing Inner ring, the bearing outer ring being set in outside bearing inner race, the retainer being arranged between bearing outer ring and bearing inner race and more The uniformly distributed rolling element on retainer of a circumferential direction along bearing inner race, which is characterized in that the device includes workbench (15), rotary shaft supporting mechanism on workbench (15), the rotary shaft for running through rotary shaft supporting mechanism in the horizontal direction are arranged on (10), the driving motor (2) that is arranged on workbench (15) and is sequentially connected with one end of rotary shaft (10) and it is arranged on work Make the radially alternating load loading unit (7) being adapted on platform (15) and with rotary shaft (10), the radially alternating load loading is single First (7) including be arranged on workbench (15) loading unit stent, be arranged on loading unit stent and be set in rotary shaft (10) external fixture block component and a pair of song for being arranged in a mutually vertical manner on loading unit stent and being adapted with fixture block component Handle connecting rod radial loaded mechanism, the crank connecting link radial loaded mechanism includes being arranged on loading unit stent and difference position The first electric rotating machine (17) and the second electric rotating machine (24) and the first electric rotating machine (17) in fixture block component both sides are sequentially connected The first crank rod assembly, be arranged between the first crank rod assembly and fixture block component the first spring loads component, with The second crank rod assembly and be arranged on the second crank rod assembly and fixture block group that second electric rotating machine (24) is sequentially connected Second spring charging assembly between part；

First crank rod assembly includes the first crank that one end is set on the output shaft of the first electric rotating machine (17) (25), it is arranged on the first connecting rod (26) of the first crank (25) other end, is arranged on the first piston of first connecting rod (26) one end (27) and the first guide cylinder (28) for being arranged on loading unit stent and being adapted with first piston (27)；

Second crank rod assembly includes the second crank that one end is set on the output shaft of the second electric rotating machine (24) (29), it is arranged on the second connecting rod (30) of the second crank (29) other end, is arranged on the second piston of second connecting rod (30) one end (31) and the second guide cylinder (32) for being arranged on loading unit stent and being adapted with second piston (31).

2. the rolling bearing performance experimental rig according to claim 1 for applying radially alternating load based on crank connecting link, It is characterized in that, the rotary shaft supporting mechanism includes the first support component being disposed in parallel on workbench (15), second Support component, the rotary shaft (10) run through the first support component and the second support component in the horizontal direction.

3. the rolling bearing performance experimental rig according to claim 2 for applying radially alternating load based on crank connecting link, It is characterized in that, first support component includes the first bearing seat (5) being arranged on workbench (15) and is arranged on In first bearing seat (5) and it is set in external the first auxiliary bearing (14) of rotary shaft (10), the second support component packet It includes the second bearing seat (9) being arranged on workbench (15) and is arranged in second bearing seat (9) and is set in rotary shaft (10) external the second auxiliary bearing (11).

4. the rolling bearing performance experimental rig according to claim 3 for applying radially alternating load based on crank connecting link, It is characterized in that, first auxiliary bearing (14) and the second auxiliary bearing (11) is rolling bearing.

5. the rolling bearing performance experimental rig according to claim 1 for applying radially alternating load based on crank connecting link, It is characterized in that, the fixture block component includes the first fixture block (8) being oppositely arranged and the second fixture block (13), the described first folder Rolling bearing installation cavity is equipped between block (8) and the second fixture block (13).

6. the rolling bearing performance experimental rig according to claim 5 for applying radially alternating load based on crank connecting link, It is characterized in that, temperature sensor (16) is equipped in first fixture block (8).

7. the rolling bearing performance experimental rig according to claim 1 for applying radially alternating load based on crank connecting link, It is characterized in that, the first spring loads component includes the first bullet being arranged between first piston (27) and fixture block component First piston link block (18) and setting between spring (19), the one end for being arranged on the first spring (19) and first piston (27) The first fixture block link block (20) between the other end of the first spring (19) and fixture block component；

The second spring charging assembly include being arranged on second spring (22) between second piston (31) and fixture block component, The second piston link block (23) that is arranged between one end of second spring (22) and second piston (31) and it is arranged on second The second fixture block link block (21) between the other end of spring (22) and fixture block component.

8. the rolling bearing performance experimental rig according to claim 1 for applying radially alternating load based on crank connecting link, It is characterized in that, being equipped with shaft coupling (3) between the driving motor (2) and rotary shaft (10), and pass through shaft coupling (3) and rotation One end of shaft (10) is sequentially connected.

9. the rolling bearing performance experimental rig according to claim 1 for applying radially alternating load based on crank connecting link, It is characterized in that, the workbench (15) is equipped with the torquemeter (4) being adapted with rotary shaft (10).

10. the rolling bearing performance experimental rig according to claim 1 for applying radially alternating load based on crank connecting link, It is characterized in that, the device further includes computer (1).