CN208091698U - It is a kind of based on the radially alternating load charger of the bearing tester of crank connecting link - Google Patents

Abstract

The utility model relates to a radial alternating load loading device for a bearing testing machine based on a crank connecting rod. The bearing testing machine includes a rotating shaft (1), and a tested bearing (2) is installed on the rotating shaft (1). ), the loading device includes a clamp (3), and an axially symmetrical and radially symmetrical rotary motor-crank linkage mechanism-spring assembly arranged around the clamp (3), wherein the axially symmetrical rotary motor-crank The connecting rod mechanism-spring assembly exerts an axial alternating load on the tested bearing (2) in the fixture (3), and the radially symmetrical rotating motor-crank linkage-spring assembly exerts an axial alternating load on the tested bearing (2) in the fixture (3). The bearing (2) applies a radial alternating load. Compared with the prior art, the utility model has the advantages of being able to realize the real working condition load of the internal combustion engine and the like.

Description

A radial alternating load loading device for bearing testing machine based on crank connecting rod

technical field

The utility model relates to a loading device of a bearing testing machine, in particular to a radial alternating load loading device for a bearing testing machine based on a crank connecting rod.

Background technique

Internal combustion engines are widely used in automobiles, ships, airplanes, tanks, railway locomotives, agricultural machinery, construction machinery, generator sets and other industries. As power equipment, they occupy a very important position in the national economy. The internal combustion engine includes several important friction pairs such as piston-cylinder liner, piston ring-cylinder liner, crankshaft-bearing and cam-tappet. Among them, the crankshaft bearing, including the main bearing and the 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.

The performance and reliability of the bearing are the most important performance indicators of the bearing, but because there are too many factors affecting the performance of the bearing, it is an effective way to conduct a bearing test. Bearing test is an important verification process that is indispensable in the bearing design and manufacturing process. The load of the test bearing is an important parameter in the test of the bearing testing machine, and its accuracy directly affects the test results of the bearing. At present, the loading characteristics of the traditional bearing test device are single, and the loading of variable loads cannot be realized. In the real internal combustion engine, the dynamic load bearing is often under alternating load, so it is difficult for the traditional bearing test loading device to realize the alternating load of the dynamic load bearing of the engine. load.

Contents of the invention

The purpose of this utility model is to provide a radial alternating load loading device for a bearing testing machine based on a crank connecting rod that can realize the loading of the real working condition load of the internal combustion engine 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 radial alternating load loading device for a bearing testing machine based on a crank connecting rod. The bearing testing machine includes a rotating shaft, and the tested bearing is installed on the rotating shaft. On the shaft, it is characterized in that the loading device includes a clamp, and an axially symmetrical and radially symmetrical rotating motor-crank connecting rod mechanism-spring assembly arranged around the clamp, wherein the axially symmetrical rotating motor-crank connecting rod The mechanism-spring assembly applies an axial alternating load to the tested bearing in the fixture, and the radially symmetrical rotating motor-crank linkage mechanism-spring assembly applies a radial alternating load to the tested bearing in the fixture.

The rotating motor-crank linkage-spring assembly includes assembly A, assembly B, assembly C and assembly D, wherein assembly A and assembly D are axially symmetrically arranged on the upper and lower sides of the clamp, and assembly B and assembly C are radially symmetrical Set on the left and right sides of the fixture.

The assembly A includes: a rotating motor A, a crank linkage mechanism A, a spring A and a connection device A, the motor A is connected to one end of the spring A through the crank linkage mechanism A, and the other end of the spring A is connected to the clamp through the connection device A ;

Component B includes: a rotating motor B, a crank linkage mechanism B, a spring B and a connecting device B. The rotating motor B is connected to one end of the spring B through the crank connecting rod mechanism B, and the other end of the spring B is connected to the clamp through the connecting device B;

The component C includes: a rotating motor C, a crank linkage C, a spring C and a connecting device C, the rotating motor C is connected to one end of the spring C through the crank connecting rod C, and the other end of the spring C is connected to the clamp through the connecting device C;

The assembly D includes: a rotating motor D, a crank-link mechanism D, a spring D and a connecting device D. The rotating motor D is connected to one end of the spring D through the crank-link mechanism D, and the other end of the spring D is connected to the clamp through the connecting device D.

The crank-link mechanism A includes a flywheel, a connecting rod and a connecting block, the connecting rod is connected with the flywheel and the rotating motor A, and the connecting block is connected with the connecting rod and the spring A respectively.

The structure of the crank linkage mechanism B, crank linkage mechanism C, and crank linkage mechanism D is the same as that of the crank linkage mechanism A.

The fixture is composed of a mirror-symmetrical upper fixture and a lower fixture. The upper fixture and the lower fixture are block-shaped, and a semicircular notch is provided on the side where the upper fixture and the lower fixture are fitted, and the combined circular notch Matched with the tested bearing.

The upper surface of the upper fixture is flat, connected with the connecting device A, and the lower surface is provided with a semicircular groove, which matches the bearing under test; the lower surface of the lower fixture is flat, connected with the connecting device D, and the upper surface Equipped with a semi-circular groove to match the tested bearing;

After the upper and lower clamps are closed, the left side is connected with connection device B, and the right side is connected with connection device C.

The bearing testing machine also includes a control system, which is connected to the rotary motor A, rotary motor B, rotary motor C, and rotary motor D, and controls the rotation angle of the rotary motor through a computer, thereby changing the tension/compression amount of the spring , controlling the elastic force of the spring can realize the loading of the alternating load of the bearing, combined with the real working conditions of the internal combustion engine, through the computer control of the rotation angle of the rotating motor and the variation of time, the loading of the real working condition load of the internal combustion engine can be realized. Using the bearing radial alternating load loading device is helpful to carry out engine dynamic bearing test.

The control system of the bearing testing machine controls the rotation of the rotating shaft, which can realize the operation of the bearing at a given speed. The change of the rotation angle of the rotating motor is controlled by the control system of the bearing testing machine, and the change of the rotation angle of the rotating motor can affect the stretching/compression of the spring. Due to the change in the tension/compression of the spring, the spring will be able to exert different magnitudes and variable directions of force on the clamp surface. The loading of bearings with radial alternating loads can be achieved by adding multiple rotating motor-crank linkage-spring units in different areas of the fixture.

The tested bearing surface is also provided with a temperature sensor, which is connected to the control system. Collect the signal during the operation of the bearing and monitor the operation status of the bearing.

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

1. The rotation angle of the rotating motor is controlled by the computer, and then the tension/compression of the spring is changed, and the elastic force of the spring is controlled, so that the alternating load of the bearing can be loaded.

2. Combined with the real working condition of the internal combustion engine, the load of the real working condition of the internal combustion engine can be realized by controlling the rotation angle of the rotating electrical machine and the variation of time through the computer. Using the bearing radial alternating load loading device is helpful to carry out engine dynamic bearing test.

Description of drawings

Fig. 1 is the schematic diagram of radial alternating load loading device of the present utility model;

Fig. 2 is a structural schematic diagram of the crank linkage mechanism.

In the figure: 1 is the rotating shaft, 2 is the tested bearing, 3 is the fixture, 4 is the rotating motor A, 5 is the crank linkage mechanism A, 51 is the flywheel, 52 is the connecting rod, 53 is the connecting block, 6 is the spring A , 7 is connecting device A, 8 is rotating motor B, 9 is crank connecting rod mechanism B, 10 is spring B, 11 is connecting device B, 12 is connecting device C, 13 is spring C, 14 is crank connecting rod mechanism C , 15 is a rotary motor C, 16 is a connecting device D, 17 is a spring D, 18 is a crank linkage D, 19 is a rotary motor D, and 20 is a temperature sensor.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

As shown in Figure 1, a radial alternating load loading device based on a crank connecting rod bearing testing machine, the bearing testing machine includes a rotating shaft 1, and the tested bearing 2 is installed on the rotating shaft 1, the The loading device includes a clamp 3, and an axially symmetrical and radially symmetrical rotary motor-crank linkage-spring assembly arranged around the clamp 3, wherein the axially symmetrical rotary motor-crank linkage-spring assembly is opposite to the clamp. The tested bearing 2 in the fixture 3 applies an axial alternating load, and the radially symmetrical rotating motor-crank linkage-spring assembly applies a radial alternating load to the tested bearing 2 in the fixture 3.

The rotating motor-crank linkage-spring assembly includes assembly A, assembly B, assembly C, and assembly D, wherein assembly A and assembly D are axially symmetrically arranged on the upper and lower sides of the fixture 3, and assembly B and assembly C are arranged radially symmetrically arranged on the left and right sides of the fixture 3 .

Wherein, the assembly A includes: a rotating motor A4, a crank linkage mechanism A5, a spring A6 and a connection device A7, the motor A4 is connected to one end of the spring A6 through the crank linkage mechanism A5, and the other end of the spring A6 is connected to the spring A6 through the connection device A7 Connection fixture 3; component B includes: rotating motor B8, crank linkage mechanism B9, spring B10 and connecting device B11, described rotating motor B8 connects one end of spring B10 through crank connecting rod mechanism B9, and the other end of spring B10 passes through connecting device B11 Connect the fixture 3; the component C includes: a rotating motor C15, a crank linkage mechanism C14, a spring C13 and a connecting device C12, the rotating motor C15 is connected to one end of the spring C13 through the crank linkage mechanism C14, and the other end of the spring C13 is connected to the connecting device C12 Connect the fixture 3; the component D includes: a rotating motor D19, a crank-link mechanism D18, a spring D17 and a connecting device D16, the rotating motor D19 connects one end of the spring D17 through the crank-link mechanism D18, and the other end of the spring D17 passes through the connecting device D16 Connect the fixture 3.

The crank-link mechanism A5 includes a flywheel 51, a connecting rod 52 and a connecting block 53, the connecting rod 52 is connected to the flywheel 51 and connected to the rotating motor A4, and the connecting block 53 is respectively connected to the connecting rod 52 and the spring A6 . The structures of the crank linkage mechanism B9, the crank linkage mechanism C14, and the crank linkage mechanism D18 are the same as those of the crank linkage mechanism A5. as shown in picture 2.

The clamp 3 is composed of a mirror-symmetrical upper clamp and a lower clamp. The upper clamp and the lower clamp are all block-shaped, and a semicircular notch is respectively provided on the side where the upper clamp and the lower clamp fit together. The notch matches the tested bearing 2. The upper surface of the upper fixture is flat and connected to the connecting device A7, and the lower surface is provided with a semicircular groove to match the tested bearing 2; the lower surface of the lower fixture is flat and connected to the connecting device D16. There is a semi-circular groove on the surface to match the tested bearing 2; after the upper and lower clamps are closed, the left side is connected to the connecting device B11, and the right side is connected to the connecting device C12.

The tested bearing 2 is installed on the rotating shaft 1 , and at the same time, the tested bearing 2 is placed inside the fixture 3 . Rotary axis 1 is driven by a bearing testing machine. In addition, the rotary motor A4 converts the rotary motion into a linear motion through the crank linkage A5, thereby controlling the tension/compression deformation of the spring A6, and the spring A6 is connected with the clamp 3 through the connecting device A7, and exerts a bearing loading force . Similarly, the rotary motor B 8 converts the rotary motion into a linear motion through the crank linkage B 9, thereby controlling the tension/compression deformation of the spring B10, and the spring B 10 is connected with the clamp 3 through the connecting device B 11 to apply bearing loading force The rotary motor C 15 converts the rotary motion into a linear motion through the crank linkage C 14, and then controls the spring C 13 to be stretched/compressed and deformed, and the spring C 13 is connected to the clamp 3 through the connecting device C 12 to apply a bearing loading force; The rotary motor D19 converts the rotary motion into a linear motion through the crank linkage D18, and then controls the tension/compression deformation of the spring D17, and the spring D17 is connected with the fixture 3 through the connecting device D16 to apply bearing loading force.

The control system of the bearing testing machine is connected with the rotary motor A4, the rotary motor B8, the rotary motor C15 and the rotary motor D19. The control system of the bearing testing machine controls the rotation of the rotating shaft 1 to realize the operation of the bearing at a given speed. At the same time, the operations of the rotating electrical machine A 4 , the electrical machine B 8 , the electrical machine C 15 and the electrical machine D 19 are also controlled by the control system of the bearing testing machine. A temperature sensor 20 is also provided on the surface of the tested bearing 2, and the temperature sensor 20 is connected to the control system to collect signals during the operation of the bearing and monitor the operation status of the bearing.

Claims (9)

1. a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, the bearing tester includes Rotary shaft (1), subject bearing (2) are mounted in the rotary shaft (1), which is characterized in that and the loading device includes fixture (3), And electric rotating machine-toggle-spring assembly of the axially symmetric and radial symmetric setting of fixture (3) surrounding setting, Electric rotating machine-toggle-the spring assembly being wherein axially and symmetrically arranged applies the subject bearing (2) in fixture (3) Axial alternating load, electric rotating machine-toggle-spring assembly of radial symmetric setting is to the subject axis in fixture (3) It holds (2) and applies radially alternating load.

2. it is according to claim 1 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, electric rotating machine-toggle-the spring assembly includes component A, component B, component C and component D, Axially and symmetrically in fixture (3), both sides, component B and component C radial symmetrics are arranged in fixture wherein component A and component D up and down for setting (3) left and right sides.

3. it is according to claim 2 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, the component A includes：Electric rotating machine A (4), toggle A (5), spring A (6) and attachment device A (7), the motor A (4) passes through connection by toggle A (5) connecting spring A (6) one end, spring A (6) other end Device A (7) jockey (3)；

Component B includes：Electric rotating machine B (8), toggle B (9), spring B (10) and attachment device B (11), the rotation Rotating motor B (8) passes through attachment device B by toggle B (9) connecting spring B (10) one end, spring B (10) other end (11) jockey (3)；

Component C includes：Electric rotating machine C (15), toggle C (14), spring C (13) and attachment device C (12), it is described Electric rotating machine C (15) is filled by toggle C (14) connecting spring C (13) one end, spring C (13) other ends by connecting Set C (12) jockey (3)；

Component D includes：Electric rotating machine D (19), toggle D (18), spring D (17) and attachment device D (16), it is described Electric rotating machine D (19) is filled by toggle D (18) connecting spring D (17) one end, spring D (17) other ends by connecting Set D (16) jockey (3).

4. it is according to claim 3 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, the toggle A (5) includes flywheel (51), connecting rod (52) and link block (53), the connecting rod (52) electric rotating machine A (4) is connect and connected with flywheel (51), and the link block (53) is separately connected connecting rod (52) and spring A (6)。

5. it is according to claim 4 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, the structure of the toggle B (9), toggle C (14), toggle D (18) with The structure of toggle A (5) is identical.

6. it is according to claim 2 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, the fixture (3) is made of the upper fixture and lower fixture of mirror symmetry, upper fixture and lower fixture are blocking Shape, and the one side to fit in upper fixture and lower fixture respectively sets a semicircular indentations, the circumferential notch being combined into and subject bearing (2) match.

7. it is according to claim 6 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, the upper fixture upper surface is plane, it is connect with attachment device A (7), it is semicircle recessed that one is equipped in lower surface Slot matches with subject bearing (2)；The lower surface of lower fixture is plane, is connect with attachment device D (16), and upper surface is equipped with one Semi-circular recesses match with subject bearing (2)；

After upper fixture and lower fixture are closed, left side is connect with attachment device B (11), and right side is connect with attachment device C (12).

8. it is according to claim 2 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, the bearing tester further includes control system, the control system and electric rotating machine A (4), electric rotating machine B (8), electric rotating machine C (15), electric rotating machine D (19) are connected, meanwhile, the rotary speed of control rotary shaft (1).

9. it is according to claim 2 a kind of based on the radially alternating load charger of the bearing tester of crank connecting link, It is characterized in that, described subject bearing (2) surface is additionally provided with a temperature sensor (20), the temperature sensor (20) connection control System processed.