CN106706317B

CN106706317B - Radial loading device for bearing tester

Info

Publication number: CN106706317B
Application number: CN201611217711.XA
Authority: CN
Inventors: 司东宏; 马喜强; 李济顺; 薛玉君; 于伟涛
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2016-12-26
Filing date: 2016-12-26
Publication date: 2023-04-07
Anticipated expiration: 2036-12-26
Also published as: CN106706317A

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

Radial loading device for bearing tester

Technical Field

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

Background

The bearing is an important and key basic part in equipment manufacturing, directly determines the performance, reliability and service life of the equipment, and because the working environment of the bearing is severe, the load working condition born by the bearing is complex, the bearing needs to be long enough, even the whole service life cycle of the equipment is maintenance-free, and the like, the bearing needs to be verified on a testing machine in the design, development, production and manufacturing processes, so that reliable test data is provided for research, design, manufacture and use, and a basis is provided for the design, manufacture and use of the bearing. The research and development, design, manufacture and test technology of the high-temperature and high-speed precision inter-shaft bearing are mainly monopolized by a few foreign countries, the research and development of the testing machine in China starts in the 7 and 80 years, the inner diameter and the outer diameter of the tested bearing are limited to be middle and small in size due to the limitation of the design, manufacture and the like at the time, the limit rotating speed is low, and the test requirements of the existing high-temperature and high-rotating-speed inter-shaft bearing with the inner diameter larger than 110mm and the outer diameter larger than 140mm cannot be met.

The existing radial loading device of the testing machine is arranged on a machine cover, and when the testing machine works, the machine cover vibrates to influence the accurate application of radial loading and the measurement error is large.

Disclosure of Invention

In order to solve the problems, the invention adopts the following scheme:

the utility model provides a radial loading device that bearing test machine used, bearing test machine include quick-witted case, case lid and the case seat of connecting about the machine case includes, still is provided with experimental main shaft at quick-witted incasement, fixed cover is equipped with radial loading bearing on experimental main shaft, the fixed cover of radial loading bearing outer lane is equipped with the bearing frame, radial loading device including the support that is "V" type, support upper portion fixed mounting have the hydro-cylinder, after the hydro-cylinder plunger stretches out the through-hole that sets up on the support to with sensor mounting panel fixed connection, sensor mounting panel and load sensor fixed connection, load sensor follow the hydro-cylinder plunger and reciprocate to apply the radial load of hydro-cylinder output on the bearing frame.

Preferably, the upper part of the box cover is provided with a through hole for the oil cylinder to pass through, a sealing plate matched with 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 through a bolt.

Preferably, the upper part of the bracket is provided with a groove, the lower part of the oil cylinder is provided with a convex part matched with the groove on the bracket, and the convex part of the oil cylinder is clamped in the groove of the bracket.

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

Further optimizing, the sensor mounting plate is fixedly connected with the oil cylinder plunger through a bolt.

Further optimization, two symmetrical grooves are formed in the side wall of the bearing seat, a convex block matched with the grooves is fixedly arranged on the box seat, and the convex block and the grooves are matched to enable the bearing seat to be axially limited.

The invention has the beneficial effects that:

1. the radial loading device is arranged on the box seat, and the box cover is provided with a through hole for the radial loading device to pass through, so that the radial loading device is prevented from being influenced by vibration of the box cover;

2. the radial loading device and the cover are designed in a separated mode, so that the test debugging can be carried out without installing the cover under the conditions of lower test rotating speed and lower temperature, the test flow is simplified, and the test efficiency is improved;

3. the disassembly and the assembly are convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a stent structure according to the present invention;

FIG. 3 is a schematic structural view of a convex block fixed bearing seat according to the present invention;

the labels in the figure are: 1. the test device comprises a box cover, 2, a box base, 3, a support, 4, an oil cylinder, 5, a sensor mounting plate, 6, a load sensor, 7, a sealing plate, 8, a cushion pad, 9, a bearing base, 10, a radial loading bearing, 11, a test main shaft, 12 and a convex block.

Detailed Description

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

As shown in fig. 1, a radial loading device that bearing test machine used, the bearing test machine include quick-witted case, the case includes case lid 1 and the case seat 2 of connecting from top to bottom, still be 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, bearing frame 9 one side fixed mounting has the food distribution dish that provides lubricated oil gas for radial loading bearing 10 to it is spacing that the food distribution dish makes radial loading bearing 10's outer lane axial, radial loading bearing 10 inner circle is spacing through shaft shoulder structure and the ladder cover axial that sets up on the experimental main shaft.

The step sleeve is provided with an oil filling hole, the step sleeve is assembled and disassembled by expanding the sleeve through injecting pressure oil, the friction state of a matching surface in the assembling and disassembling process is improved due to the existence of the pressure oil, the scratch of the matching surface with the test main shaft 11 is reduced, the stress concentration is realized by adopting the mode, and in order to balance the oil filling hole, the step sleeve is also provided with a balance hole which is symmetrical to the oil filling hole about the axis of the step sleeve.

As shown in FIG. 2, the radial loading device comprises the bracket 3 in an inverted V shape, and by adopting the structure, the stress on the bracket 3 is uniform, and the bracket has better stability.

The bottom end of a support 3 is fixedly connected with a box base 2 through a bolt, an oil cylinder 4 is fixedly arranged on the upper portion of the support 3, an oil cylinder plunger extends out of a through hole formed in the support 3 and is fixedly connected with a sensor mounting plate 5, the sensor mounting plate 5 is fixedly connected with a load sensor 6, when the oil cylinder 4 operates, the oil cylinder plunger drives the sensor mounting plate 5, the sensor mounting plate 5 drives the load sensor 6, the load sensor 6 moves up and down along with the oil cylinder plunger, and radial load output by the oil cylinder 4 is applied to a bearing block 9.

The upper part of the box cover 1 of the invention is provided with a through hole for the oil cylinder 4 to pass through, a sealing plate 7 matched with the through hole is fixed at the periphery of the oil cylinder 4, the edge of the sealing plate 7 is fixedly connected with the box cover 1 through a bolt, when a testing machine runs at high speed, the arranged sealing plate 7 keeps the sealing of a testing environment, and when the testing machine runs at low speed, the sealing plate 7 and the box cover 1 can be detached to directly detect and debug the testing machine.

The design that the contact part of the oil cylinder 4 and the bracket 3 is clamped at the through hole has higher compactness and stability, and when the testing machine vibrates in operation, the radial loading device is fixed by the design, so that the radial loading device is prevented from being damaged.

According to the invention, the groove is formed in the upper part of the bracket 3, the convex part matched with the groove of the bracket 3 is arranged at the lower part of the oil cylinder 4, and the convex part of the oil cylinder 4 is clamped in the groove of the bracket 3, so that the clamping manner has good tightness, and the bracket can uniformly bear the gravity of the oil cylinder 4.

The invention is characterized in that a buffer pad 8 for preventing skid and shock is arranged on the upper part of a 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.

As shown in fig. 3, two symmetrical grooves are formed in the side wall of the bearing seat 9, the box base 2 is fixedly provided with a convex block 12 matched with the grooves, the convex block 12 is matched with the grooves to axially limit the bearing seat 9, when the testing machine operates, the radial vibration of the bearing seat 9 can be caused only by applying force by a radial loading device, so that the testing result is influenced, and the position of the bearing seat 9 is limited in such a way, so that the testing result is more accurate.

The technical solutions and embodiments described in the present invention are not intended to be limiting, and the equivalent solutions or the equivalent effects to those of the technical solutions and embodiments described in the present invention are within the scope of the present invention.

Claims

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.