CN106706317B - Radial loading device for bearing tester - Google Patents

Abstract

The invention relates to a radial loading device for a bearing tester, which comprises a case, wherein the case comprises a case cover and a case seat which are connected up and down, a test main shaft is also arranged in the case, a radial loading bearing is fixedly sleeved on the test main shaft, a bearing seat is fixedly sleeved on the outer ring of the radial loading bearing, the radial loading device comprises an inverted V-shaped bracket, an oil cylinder is fixedly arranged on the upper part of the bracket, an oil cylinder plunger extends out of a through hole arranged on the bracket and is fixedly connected with a sensor mounting plate, the sensor mounting plate is fixedly connected with a load sensor, the load sensor moves up and down along with the oil cylinder plunger and applies the radial load output by the oil cylinder on the bearing seat. The radial loading device and the cover are designed in a separated mode, so that the cover can be tested and debugged without being installed under the conditions of low test rotating speed and low temperature, the test process is simplified, and the test efficiency is improved.

Description

A radial loading device for a bearing testing machine

technical field

The invention relates to the technical field of bearing testing machines, in particular to a radial loading device for bearing testing machines.

Background technique

Bearing is an important and key basic component in equipment manufacturing, which directly determines the performance, reliability and life of the equipment. Due to the harsh working environment of the bearing and the complex load conditions, it must be long enough or even the entire life cycle of the equipment. Maintenance, etc. During the design, development and manufacturing process, the bearings must be verified on the testing machine for corresponding simulated working conditions to provide reliable test data for research, design, manufacture and use, and provide a basis for the design, manufacture and use of bearings . The research and development, design, manufacture and test technology of high-temperature, high-speed precision inter-axial bearings are mainly monopolized by a few foreign countries. The research and development of this type of testing machine in my country began in the 1970s and 1980s. Due to the limitations of design and manufacturing at that time, the test The inner and outer diameters of the bearings are also limited to medium and small sizes, and the limit speed is also low, which cannot meet the current test requirements for inter-shaft bearings with an inner diameter greater than 110mm and an outer diameter greater than 140mm at high temperature and high speed.

The radial loading device of the existing testing machine is installed on the machine cover. When the testing machine is working, the vibration of the machine cover affects the accurate application of radial loading and the measurement error is large.

Contents of the invention

In order to solve the above problems, the scheme adopted in the present invention is:

A radial loading device for a bearing testing machine, the bearing testing machine includes a case, the case includes a case cover and a case base connected up and down, a test main shaft is also arranged in the case, and a radial shaft is fixedly sleeved on the test main shaft. For radial loading bearings, the outer ring of the radial loading bearing is provided with a bearing seat. The radial loading device includes an inverted "V"-shaped bracket, and an oil cylinder is fixedly installed on the upper part of the bracket, and the plunger of the oil cylinder extends out of the bracket. After the through hole set on the top, it is fixedly connected with the sensor mounting plate, and the sensor mounting plate is fixedly connected with the load sensor. The load sensor moves up and down with the plunger of the oil cylinder, and applies the radial load output by the oil cylinder to the bearing seat.

Further optimization, the upper part of the box cover is provided with a through hole for the oil cylinder to pass through, and a sealing plate matching the through hole is fixed on the periphery of the oil cylinder, and the edge of the sealing plate is fixedly connected with the box cover by bolts.

Further optimization, the upper part of the bracket is provided with a groove, the lower part of the oil cylinder is provided with a raised part matching the groove on the bracket, and the raised part of the oil cylinder is clamped in the groove of the bracket.

Further optimization, the upper part of the bearing seat is provided with a buffer pad, the load sensor applies a load to the bearing seat through the buffer pad, and the load sensor and the buffer pad are in point contact.

Further optimization, the sensor mounting plate and the cylinder plunger are fixedly connected by bolts.

Further optimization, two symmetrical grooves are arranged on the side wall of the bearing seat, and a convex block matching with the groove is fixedly arranged on the box seat, and the convex block and the groove cooperate to make the axial direction of the bearing seat limit.

The beneficial effects of the present invention are:

1. The radial loading device is installed on the box base, and a through hole is provided on the box cover for the radial loading device to pass through, so as to avoid the influence of the vibration of the box cover on the radial loading device;

2. The separate design of the radial loading device and the machine cover, in the case of low test speed and temperature, the test and debugging can be carried out without installing the machine cover, which simplifies the test process and improves the test efficiency;

3. Easy to assemble and disassemble.

Description of drawings

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

Fig. 2 is a schematic diagram of a stent structure of the present invention;

Fig. 3 is a schematic diagram of the structure of the convex block fixed bearing seat of the present invention;

Marks in the figure: 1. Box cover, 2. Box seat, 3. Bracket, 4. Oil cylinder, 5. Sensor mounting plate, 6. Load sensor, 7. Sealing plate, 8. Cushion pad, 9. Bearing seat, 10, Radial loading bearing, 11, test main shaft, 12, convex block.

Detailed ways

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

As shown in Figure 1, a radial loading device for a bearing testing machine, the bearing testing machine includes a casing, the casing includes a case cover 1 and a case seat 2 connected up and down, and a test spindle 11 is also arranged in the casing, On the test main shaft 11, the fixed sleeve is provided with a radially loaded bearing 10, and the outer ring of the radially loaded bearing 10 is provided with a bearing seat 9, and one side of the bearing seat 9 is fixedly installed with an oil distribution device for providing lubricating oil and gas to the radially loaded bearing 10. The oil distribution plate makes the outer ring of the radially loaded bearing 10 axially limited, and the inner ring of the radially loaded bearing 10 is axially limited by the shoulder structure and the stepped sleeve provided on the test main shaft.

The stepped sleeve is provided with an oil injection hole, and the installation and disassembly of the stepped sleeve depends on the injection of pressure oil to expand the sleeve, and due to the existence of pressure oil, the friction state of the mating surface during the assembly and disassembly process is improved, and the friction with the test is reduced. The abrasion of the mating surface of the main shaft 11 is stress concentrated in this way. In order to balance the oil injection hole, a balance hole symmetrical to the axis of the stepped sleeve with the oil injection hole is also provided on the stepped sleeve.

As shown in FIG. 2 , the radial loading device includes an inverted "V"-shaped bracket 3, which not only allows the bracket 3 to be stressed evenly, but also has better stability.

The bottom end of the support 3 of the present invention is fixedly connected with the box base 2 by bolts, the upper part of the support 3 is fixedly equipped with an oil cylinder 4, and the oil cylinder plunger stretches out from the through hole provided on the support 3, and is fixedly connected with the sensor mounting plate 5, The sensor mounting plate 5 is fixedly connected with the load sensor 6. When the oil cylinder 4 is in operation, the oil cylinder plunger drives the sensor mounting plate 5, and the sensor mounting plate 5 drives the load sensor 6. The load sensor 6 moves up and down following the oil cylinder plunger, and outputs the Radial loads are applied to the bearing housing 9 .

The upper part of the case cover 1 of the present invention is provided with a through hole for the oil cylinder 4 to pass through, and a sealing plate 7 matching the through hole is fixed on the periphery of the oil cylinder 4, and the edge of the sealing plate 7 is fixedly connected with the case cover 1 by bolts. During operation, the set sealing plate 7 keeps the test environment closed. When the testing machine is running at a low speed, the sealing plate 7 and the box cover 1 can be removed to directly detect and debug the testing machine.

The design in which the contact part of the oil cylinder 4 and the support 3 is stuck at the through hole has higher compactness and stability. When the testing machine vibrates, the design fixes the radial loading device to prevent radial Damage to the loading device.

The upper part of the bracket 3 of the present invention is provided with a groove, and the lower part of the oil cylinder 4 is provided with a raised part matching the groove of the bracket 3, and the raised part of the oil cylinder 4 is clamped in the groove of the bracket 3. Better, and the support can bear the gravity of oil cylinder 4 evenly.

The upper part of the bearing seat 9 of the present invention is provided with a non-slip and shock-absorbing buffer pad 8, and the load sensor 6 applies a load to the bearing seat 9 through the buffer pad 8, and the load sensor 6 and the buffer pad 8 are in point contact.

As shown in Figure 3, two symmetrical grooves are arranged on the side wall of the bearing seat 9 of the present invention, and a convex block 12 matching with the groove is fixedly arranged on the box seat 2, and the convex block 12 is connected with the groove. The grooves cooperate to limit the axial position of the bearing seat 9. When the testing machine is running, only the force exerted by the radial loading device may cause the bearing seat 9 to vibrate radially and affect the test results. This method limits the position of the bearing seat 9. Thereby making the test results more accurate.

The technical solutions and implementation methods listed in the present invention are not limiting, and solutions that are equivalent to or have the same effect as the technical solutions and implementation methods listed in the present invention are within the protection scope of the present invention.

Claims (6)

1. The utility model provides a radial loading device that bearing test machine was used, bearing test machine include quick-witted case, case lid (1) and case seat (2) that the case includes upper and lower connection still are provided with experimental main shaft (11) at quick-witted incasement, fixed cover is equipped with radial loading bearing (10) on experimental main shaft (11), the fixed cover in radial loading bearing (10) outer lane is equipped with bearing frame (9), its characterized in that: radial loading device including support (3) that are "V" type, support (3) upper portion fixed mounting have hydro-cylinder (4), after the hydro-cylinder plunger stretched out the through-hole that sets up on support (3) to with sensor mounting panel (5) fixed connection, sensor mounting panel (5) and load sensor (6) fixed connection, load sensor (6) reciprocate along with the hydro-cylinder plunger, and exert the radial load of hydro-cylinder (4) output on bearing frame (9).

2. The radial loading device for the bearing tester as claimed in claim 1, wherein: the oil tank is characterized in that a through hole for the oil cylinder (4) to pass through is formed in the upper portion of the tank cover (1), a sealing plate (7) matched with the through hole is fixed on the periphery of the oil cylinder (4), and the edge of the sealing plate (7) is fixedly connected with the tank cover (1) through a bolt.

3. The radial loading device for the bearing tester as claimed in claim 1, wherein: the upper part of the bracket (3) is provided with a groove, the lower part of the oil cylinder (4) is provided with a convex part matched with the groove on the bracket (3), and the convex part of the oil cylinder (4) is clamped in the groove of the bracket (3).

4. The radial loading device for the bearing tester as claimed in claim 1, wherein: the load sensor is characterized in that a buffer pad (8) is arranged on the upper portion of the bearing seat (9), the load sensor (6) applies load to the bearing seat (9) through the buffer pad (8), and the load sensor (6) is in point contact with the buffer pad (8).

5. The radial loading device for the bearing tester as claimed in claim 1, wherein: the sensor mounting plate (5) is fixedly connected with the oil cylinder plunger through a bolt.

6. The radial loading device for the bearing tester as claimed in claim 1, wherein: the side wall of the bearing seat (9) is provided with two symmetrical grooves, the box seat (2) is fixedly provided with a convex block (12) matched with the grooves, and the convex block (12) is matched with the grooves to enable the bearing seat (9) to be axially limited.

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