High-temperature bearing testing device
By designing a high-temperature bearing test device, the problem of insufficient development of bearing testing machines in ultra-high temperature environments was solved, and the performance and life testing of bearings in a high-temperature inert gas environment within the range of 400℃ to 800℃ was realized, providing a test basis and hardware support.
Patent Information
- Application Number
- CN202422632678.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the existing technology, there are few bearing testing machines developed in ultra-high temperature environments, and there is a lack of testing methods, making it difficult to perform performance and life tests of bearings in ultra-high temperature environments.
A high-temperature bearing test device was designed, which included a drive unit, a diaphragm coupling, a torque sensor, a flexible coupling, an L-shaped fixed seat, a clamping end cover, a test bearing outer mounting sleeve, a radial loading assembly, a test shaft system, a temperature sensor, an air inlet, a ceramic heating furnace, a radial loading fixture and a support platform. The device can simulate a high-temperature inert gas environment of 400°C to 800°C. The driving force is provided by a servo motor and a frequency converter, and performance and life tests are carried out in combination with the radial loading assembly and the temperature sensor.
The performance and life test of bearings in a high-temperature inert gas environment within the range of 400℃ to 800℃ has been realized, filling the gap in ultra-high temperature bearing testing technology and providing a testing basis and hardware support for the development and matching of bearing products.
Smart Images
Figure CN223426262U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-temperature bearing testing, in particular to a high-temperature bearing testing device. Background Art
[0002] Currently, there are few domestically developed bearing testing machines suitable for use in ultra-high temperature environments. However, bearings used in other environments, such as aircraft engine main shaft bearings and gas turbine bearings, mostly operate below 300°C. Testing of these bearings using test fixtures made of Cr4Mo4V material can meet these requirements. For bearings operating in high-temperature environments above 400°C, higher requirements are placed on material linear expansion, oxidation resistance, sensor selection, and test environment simulation. Therefore, simulating bearing testing conditions in ultra-high temperature environments is a technical challenge that those skilled in the art need to address.
[0003] How to design a high-temperature bearing test device with ingenious design, simple structure, convenience and practicality, which can simulate the test environment of ultra-high temperature bearings, improve the test means, and provide a test basis and hardware support for the development and matching of bearing products is a problem that needs to be solved at present. Utility Model Content
[0004] In order to solve the problems of the lack of existing bearing testing machines for use in ultra-high temperature environments, the lack of testing means, and the difficulty in implementing performance and life tests of bearings in ultra-high temperature environments, the utility model provides a high-temperature bearing testing device with ingenious design, simple structure, convenience and practicality, which can simulate the test environment of ultra-high temperature bearings, improve the testing means, and provide a test basis and hardware support for the development and matching of bearing products.
[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a high-temperature bearing test device, including a drive unit, a diaphragm coupling, a torque sensor, a flexible coupling, an L-shaped fixing seat, a clamping end cover, a test bearing outer mounting sleeve, a radial loading assembly, a test shaft system, a temperature sensor, an air inlet, a ceramic heating furnace, a radial loading fixing frame and a support platform. The drive unit provides a driving force for the test bearing, and the driving force is transmitted through the diaphragm coupling and drives the torque sensor to rotate. The torque sensor is connected to the test shaft system fixed on the upper end of the L-shaped fixing seat through a flexible coupling, driving the test shaft system to rotate; a radial loading assembly is arranged above the test shaft system, and the radial loading assembly provides radial loading for the test bearing; the ceramic heating furnace is arranged on the periphery of the test bearing outer mounting sleeve and provides a heat source for the test bearing.
[0006] As a further optimization scheme of the high-temperature bearing test device, the radial loading assembly comprises a piston rod, a copper sleeve, a loading rod, a force sensor, a force sensor fixing seat, a threaded seat, a threaded rod, a rotating handle and a loading positioning sleeve, the edge of the loading positioning sleeve is fixed on the radial loading fixing frame by bolts, the loading positioning sleeve is a hollow cavity structure, the piston rod, the copper sleeve, the loading rod, the force sensor and the force sensor fixing seat are sequentially arranged in the cavity from bottom to top, the copper sleeve is arranged at the lower end of the inner cavity of the loading positioning sleeve, the piston rod is arranged in the inner hole of the copper sleeve, the lower end of the piston rod is connected with the two sets of bearing outer bushings at the center of the test shaft system through threads to load the test shaft system, a loading rod is arranged above the piston rod, the top end of the loading rod is a platform structure, the lower end of the force sensor is provided with a boss in contact with the top end of the loading rod, and the upper end of the force sensor is fixed in the cylindrical cavity through the force sensor fixing seat; the threaded seat is fixed on the top of the loading positioning sleeve by bolts, the threaded rod is connected with the threaded seat through the threaded hole in the center of the threaded seat, the top end of the threaded rod is provided with a horizontally rotating rotating handle, rotating the rotating handle drives the threaded rod and the piston rod to move downward to apply radial load to the test shaft system, and the applied force is displayed through the force sensor.
[0007] As a further optimization scheme of the high-temperature bearing test device, the flexible coupling comprises two flange plates, a through hole is formed in each flange plate, and a flexible rope is arranged in the through hole to connect the two flange plates together.
[0008] As a further optimization scheme of the high-temperature bearing test device, the compression end cover is a T-shaped structure, the upper end of the compression end cover is vertically fixed on the test bearing outer mounting sleeve by a plurality of bolts, and the side end is tightly attached to the bearing outer bushing on the right side of the test shaft system to axially pre-compress and heat-seal the test shaft system.
[0009] As a further optimization scheme of the high-temperature bearing test device, a temperature sensor and an air inlet are arranged on the left side of the test bearing outer mounting sleeve.
[0010] As a further optimization scheme of the high-temperature bearing test device, the temperature sensor extends into the bearing outer bushing on the left side of the test shaft system to measure the ambient temperature in the test cavity.
[0011] As a further optimization scheme of the high-temperature bearing test device, the air inlet is connected with an inert gas outside to provide a test environment for the test shaft system in the test cavity.
[0012] As a further optimization scheme of the high-temperature bearing test device, the driving unit comprises a servo motor and a frequency converter, and the driving unit provides driving force for the test bearing.
[0013] As a further optimization solution of the above-mentioned high-temperature bearing test device, the driving unit, torque sensor, L-shaped fixing seat, and the bottom of the radial loading fixing frame are all fixed to the supporting platform by bolts.
[0014] As a further optimization solution of the above-mentioned high-temperature bearing test device, the device also includes a computer monitoring system for monitoring the speed, torque, heating temperature and gas flow parameters of the bearing during the test.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. The present invention includes a drive unit, a diaphragm coupling, a torque sensor, a flexible coupling, an L-shaped mounting base, a clamping end cap, a test bearing outer mounting sleeve, a radial loading assembly, a test shafting system, a temperature sensor, an air inlet, a ceramic heating furnace, a radial loading mounting bracket, and a support platform. The drive unit provides driving force for the test bearing, which is transmitted through the diaphragm coupling and drives the torque sensor to rotate. The torque sensor is connected to the test shafting system fixed to the upper end of the L-shaped mounting base via a flexible coupling, driving the test shafting system to rotate. A radial loading assembly is disposed above the test shafting system to provide radial loading for the test bearing. The ceramic heating furnace is disposed outside the test bearing outer mounting sleeve and provides a heat source for the test bearing.
[0017] Second, the main innovation of this utility model is that it can test ultra-high-temperature bearings with an inner diameter ≥9mm, an outer diameter ≤35mm, and a width ≤16mm. This not only enhances the design and manufacturing experience of ultra-high-temperature equipment, but also expands the testing technology for ultra-high-temperature bearings and enriches the functionality of the test equipment. This application is highly sought after in the ultra-high-temperature bearing research field.
[0018] 3. The main innovation of this utility model is that it can test the performance and life of bearings in a high-temperature inert gas environment within 400℃ to 800℃, filling the gap in the bearing industry's ultra-high temperature bearing testing technology, providing new testing technology for ultra-high temperature testing of bearings, improving testing methods, and providing a testing basis and hardware support for the development and supporting of bearing products. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic cross-sectional view of a high-temperature bearing test device of the present invention;
[0020] Figure 2 This is a schematic cross-sectional view of the radial loading assembly of the utility model;
[0021] Markings in the figure: 1 is the drive unit; 2 is the diaphragm coupling; 3 is the torque sensor; 4 is the flexible coupling; 5 is the L-shaped fixing seat; 6 is the clamping end cover; 7 is the test bearing outer mounting sleeve; 8 is the radial loading assembly; 8-1 is the piston rod; 8-2 is the copper sleeve; 8-3 is the loading rod; 8-4 is the force sensor; 8-5 is the force sensor fixing seat; 8-6 is the threaded seat; 8-7 is the threaded rod; 8-8 is the rotating handle; 8-9 is the loading positioning sleeve; 9 is the test shaft system; 10 is the temperature sensor; 11 is the air inlet; 12 is the ceramic heating furnace; 13 is the radial loading fixing frame; 14 is the supporting platform. DETAILED DESCRIPTION
[0022] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.
[0023] like Figure 1 As shown, Figure 1 This is a schematic diagram of the cross-sectional structure of a high-temperature bearing test device of the present invention; a high-temperature bearing test device, including a drive unit 1, a diaphragm coupling 2, a torque sensor 3, a flexible coupling 4, an L-shaped fixing seat 5, a clamping end cover 6, a test bearing outer mounting sleeve 7, a radial loading assembly 8, a test shaft system 9, a temperature sensor 10, an air inlet 11, a ceramic heating furnace 12, a radial loading fixing frame 13 and a support platform 14.
[0024] like Figure 2 As shown, Figure 2The utility model discloses a radial loading assembly sectional structure schematic diagram, the radial loading assembly 8 includes piston rod 8-1, copper bush 8-2, loading rod 8-3, force sensor 8-4, force sensor fixed seat 8-5, threaded seat 8-6, threaded rod 8-7, rotating handle 8-8 and loading positioning sleeve 8-9, the edge portion of loading positioning sleeve 8-9 is fixed on radial loading fixed frame 13 through bolt piece, and loading positioning sleeve 8-9 is hollow cavity structure, and piston rod 8-1, copper bush 8-2, loading rod 8-3, force sensor 8-4, force sensor fixed seat 8-5 are sequentially arranged in cavity from below, wherein copper bush 8-2 is arranged in the lower end of the inner chamber of loading positioning sleeve 8-9, and piston rod 8-1 is arranged in the inner hole of copper bush 8-2, and the lower end of piston rod 8-1 is connected with the two sets of bearing outer bushings of test shaft system 9 center through thread, so as to load test shaft system 9, and the upper of piston rod 8-1 is provided with loading rod 8-3, and the top of loading rod 8-3 is platform structure, and the lower end of force sensor 8-4 is provided with the boss in contact with the top of loading rod 8-3, and the upper end of force sensor 8-4 is fixed in cylindrical cavity through force sensor fixed seat 8-5;Threaded seat 8-6 is fixed on the top of loading positioning sleeve 8-9 through bolt piece, and threaded rod 8-7 is connected together through the threaded hole of threaded seat 8-6 center and threaded seat 8-6, and the top of threaded rod 8-7 is provided with rotating handle 8-8 that rotates horizontally, and rotating handle 8-8 rotates, drives threaded rod 8-7, piston rod 8-1 to move downwards, applies radial load to test shaft system 9, and shows the exerted force through force sensor 8-4.
[0025] When the testing device works, the driving unit 1 provides driving force, which is provided to the test bearing by the servo motor through the frequency converter. The driving force is transmitted to the torque sensor 3 through the diaphragm coupling 2, driving the torque sensor 3 to rotate. The torque sensor 3 is connected to the test shaft system 9 fixed on the L-shaped fixed seat 5 through the flexible coupling 4 (the flexible coupling 4 is a self-made component, the through hole is drilled on the flange plate, and the two flanges are connected through the nylon rope passing through the hole), driving the test shaft system 9 to rotate. The compression end cover 6 presses the right bearing outer bushing of the test shaft system 9, playing the role of axial pre-tightening and heat-sealing. The test bearing outer mounting sleeve 7 plays the role of supporting and fixing the test shaft system 9 and heat conduction. The radial loading assembly 8 provides radial loading for the test bearing. The temperature sensor 10 extends into the left bearing outer bushing of the test shaft system 9, used to measure the ambient temperature in the test cavity. The air inlet 11 is used to introduce inert gas to provide the required gas environment for the test bearing. The ceramic heating furnace 12 is installed on the test bearing outer mounting sleeve 7 to provide heat source for the test bearing. The radial loading fixed frame 13 is used to support the radial loading assembly 8. The support platform 14 is used to support the testing device.
[0026] In order to avoid the influence of high temperature on the test loading device, the radial loading assembly 8 of this patent is used for loading. Loading principle: the piston rod 8-1 is connected to the test shaft system 9 through a thread, and the upper end is positioned with the inner hole of the copper sleeve 8-2. The loading rod 8-3 is used to transmit the force value of the force sensor 8-4 to the piston rod 8-1. The other end of the piston rod 8-1 is connected to the two sets of bearing outer sleeves in the middle of the test shaft system 9 through a thread to load the test shaft system 9. The force sensor fixing seat 8-5 is used to fix the force sensor 8-4. The threaded seat 8-6 cooperates with the threaded rod 8-7. By turning the handle 8-8 and rotating the thread, the threaded rod 8-7 moves downward, applying a radial load to the test shaft system 9, and the applied force is displayed by the force sensor 8-4. The loading positioning sleeve 8-9 is fixed on the radial loading fixing frame 13 to position and fix the loading assembly.
[0027] The device also includes a computer monitoring system, which monitors the speed, torque, heating temperature, gas flow and other parameters of the bearing during the test. If an abnormality is encountered, an alarm can be issued to shut down the device to ensure safe operation of the test.
[0028] In practical application, this device can test four sets of bearings at a time and simulate the testing environment for ultra-high-temperature bearings. This technology enables performance and life testing of bearings in high-temperature inert gas environments within the 400°C to 800°C range, filling a gap in the bearing industry's ultra-high-temperature bearing testing technology. With the expansion of this technology, ultra-high-temperature bearings with an inner diameter ≥9mm, an outer diameter ≤35mm, and a width ≤16mm can be tested. This not only enhances experience in ultra-high-temperature equipment design and manufacturing, but also expands bearing testing technology in this area and enriches the test device's functionality. This field of ultra-high-temperature bearing research is in high demand.
[0029] The utility model has an ingenious design, a simple structure, is convenient and practical, can simulate the test environment of ultra-high temperature bearings, improve the test means, provide a test basis and hardware support for the development and matching of bearing products, and solve the problems of the existing bearing testing machines used in ultra-high temperature environments being less developed, lacking test means, and difficulty in achieving performance and life tests of bearings in ultra-high temperature environments. Compared with the existing technology, it has good market prospects and development space.
[0030] The preferred specific implementation methods and embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation methods and embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the concept of the present invention.
Claims
1. A high-temperature bearing test device, characterized in that: The invention comprises a driving unit (1), a diaphragm coupling (2), a torque sensor (3), a flexible coupling (4), an L-shaped fixed seat (5), a clamping end cover (6), a test bearing outer mounting sleeve (7), a radial loading assembly (8), a test shaft system (9), a temperature sensor (10), an air inlet (11), a ceramic heating furnace (12), a radial loading fixed frame (13) and a supporting platform (14), wherein the driving unit (1) provides a driving force for the test bearing, the driving force is transmitted through the diaphragm coupling (2) and drives the torque sensor (3) to rotate, the torque sensor (3) is connected to the test shaft system (9) fixed to the upper end of the L-shaped fixed seat (5) through the flexible coupling (4), and drives the test shaft system (9) to rotate; a radial loading assembly (8) is arranged above the test shaft system (9), and the radial loading assembly (8) provides radial loading for the test bearing; the ceramic heating furnace (12) is arranged on the periphery of the test bearing outer mounting sleeve (7) and provides a heat source for the test bearing.
2. A high-temperature bearing testing device according to claim 1, characterized in that: The radial loading assembly (8) comprises a piston rod (8-1), a copper sleeve (8-2), a loading rod (8-3), a force sensor (8-4), a force sensor fixing seat (8-5), a threaded seat (8-6), a threaded rod (8-7), a rotating handle (8-8) and a loading positioning sleeve (8-9), wherein the edge of the loading positioning sleeve (8-9) is fixed to the radial loading fixing frame (13) by a bolt, and the loading positioning sleeve (8-9) is a hollow cavity structure, wherein the piston rod (8-1), the copper sleeve (8-2), the loading rod (8-3), the force sensor (8-4) and the force sensor fixing seat (8-5) are sequentially arranged in the cavity from bottom to top, wherein the copper sleeve (8-2) is arranged at the lower end of the inner cavity of the loading positioning sleeve (8-9), the piston rod (8-1) is arranged in the inner hole of the copper sleeve (8-2), and the lower end of the piston rod (8-1) is connected to the two sets of the center of the test shaft system (9) through a thread. The bearing outer bushing is connected to load the test shaft system (9). A loading rod (8-3) is provided above the piston rod (8-1). The top of the loading rod (8-3) is a platform structure. The lower end of the force sensor (8-4) is provided with a boss that contacts the top of the loading rod (8-3). The upper end of the force sensor (8-4) is fixed in the cylindrical cavity through the force sensor fixing seat (8-5); the threaded seat (8-6) is fixed to the top of the loading positioning sleeve (8-9) through a bolt member, and the threaded rod (8-7) is connected to the threaded seat (8-6) through the threaded hole in the center of the threaded seat (8-6). The top of the threaded rod (8-7) is provided with a horizontally rotating handle (8-8). The rotating handle (8-8) drives the threaded rod (8-7) and the piston rod (8-1) to move downward, thereby applying a radial load to the test shaft system (9), and the applied force is displayed by the force sensor (8-4).
3. A high temperature bearing test device according to claim 1, characterized in that: The flexible coupling (4) comprises two flanges, each flange having a through hole, a flexible rope passing through the through hole, and the two flanges are connected together by the flexible rope.
4. A high temperature bearing test device according to claim 1, characterized in that: The clamping end cover (6) is a T-shaped structure. The upper end of the clamping end cover (6) is vertically fixed to the test bearing outer mounting sleeve (7) by a plurality of bolts, and the side end is in close contact with the outer bushing of the bearing on the right side of the test shaft system (9) to perform axial pre-compression and heat insulation sealing on the test shaft system (9).
5. The high-temperature bearing testing device according to claim 1, characterized in that: A temperature sensor (10) and an air inlet (11) are provided on the left side of the test bearing outer mounting sleeve (7).
6. A high temperature bearing test device according to claim 5, characterized in that: The temperature sensor (10) extends into the outer bushing of the left bearing of the test shaft system (9) to measure the ambient temperature in the test cavity.
7. A high temperature bearing testing device according to claim 5, characterized in that: The air inlet (11) is externally connected to an inert gas to provide a test environment for the test shaft system (9) in the test cavity.
8. The high-temperature bearing testing device according to claim 1, characterized in that: The drive unit (1) comprises a servo motor and a frequency converter, and the drive unit (1) provides driving force for the test bearing.
9. The high-temperature bearing testing device according to claim 1, characterized in that: The bottoms of the drive unit (1), torque sensor (3), L-shaped fixing seat (5), and radial loading fixing frame (13) are all fixed to the supporting platform (14) via bolts.
10. A high temperature bearing testing device according to any one of claims 1 to 9, characterized in that: The device also includes a computer monitoring system for monitoring the rotational speed, torque, heating temperature and gas flow parameters of the bearing during the test.