Rolling bearing friction torque testing device

Abstract

The utility model relates to a rolling bearing friction torque testing device which comprises a driving unit, a diaphragm coupling, a supporting shaft system, a heating ring, a high-low temperature box heat preservation sleeve, a high-low temperature box, a test bearing friction torque testing assembly and a rack. The test bearing friction torque test assembly comprises a test bearing outer bush, a test bearing, a test connecting shaft, a test bearing inner ring gland, a test bearing outer ring gland, a guide rod, a miniature force sensor, a force sensor fixing frame and a high and low temperature box base. The friction torque testing device is ingenious in design, simple in structure, convenient and practical, can simulate testing of starting friction torque and operation friction torque of the rolling bearing in high and low temperature environments, fills the blank of friction torque measurement of the rolling bearing in the high and low temperature environments in the bearing industry, enhances testing technical means and methods of the rolling bearing in high and low temperature aspects, and improves testing efficiency. Compared with the prior art, the device has good market prospect and development space.

Description

Technical Field

[0001] The utility model relates to the technical field of parameter testing of rolling bearings in high and low temperature environments, in particular to a rolling bearing friction torque testing device. Background Art

[0002] Currently, the starting and running friction torque tests of rolling bearings are primarily conducted at room temperature, according to the test method in "GB / T 32562-2016 Rolling Bearing Friction Torque Test Method." However, testing of rolling bearing friction torque in high or low temperature environments is rarely performed.

[0003] How to design a rolling bearing friction torque test device with ingenious design, simple structure, convenience and practicality, which can simulate the starting friction torque and operating friction torque test of rolling bearings in high and low temperature environments, fill the gap in the bearing industry's friction torque measurement of rolling bearings in high and low temperature environments, and enhance the testing technical means and methods of rolling bearings in high and low temperature environments is a problem that needs to be solved at present. Utility Model Content

[0004] In order to solve the technical gaps in the existing measurement of friction torque of rolling bearings in high and low temperature environments, the lack of testing technical means and methods, and the inability to accurately record the specific parameters of the starting friction torque and operating friction torque of rolling bearings in high and low temperature environments, the utility model provides a rolling bearing friction torque testing device, which has a clever design, simple structure, convenience and practicality, can simulate the test of the starting friction torque and operating friction torque of rolling bearings in high and low temperature environments, fill the gap in the bearing industry for the measurement of friction torque of rolling bearings in high and low temperature environments, and enhance the purpose of testing technical means and methods for rolling bearings in high and low temperature aspects.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a rolling bearing friction torque test device, including a drive unit, a diaphragm coupling, a supporting shaft system, a heating ring, a high and low temperature box insulation sleeve, a high and low temperature box, a test bearing friction torque test assembly and a frame, the test bearing friction torque test assembly includes a test bearing outer sleeve, a test bearing, a test connecting shaft, a test bearing inner ring pressure cover, a test bearing outer ring pressure cover, a guide rod, a miniature force sensor, a force sensor fixing frame and a high and low temperature box base, the inner ring of the test bearing and the test connecting shaft are installed through clearance fit, and the test bearing inner ring pressure cover is screwed. The nails press the inner ring of the test bearing to ensure that there is no relative rotation between the inner ring and the test connecting shaft; the outer ring of the test bearing is installed with the test bearing outer sleeve through clearance fit, and the test bearing outer ring cover presses and fixes the outer ring of the test bearing with screws to ensure that there is no relative rotation between the outer ring and the test bearing outer sleeve; one end of the guide rod is fixed to the test bearing outer sleeve through threads, and the other end droops naturally; the miniature force sensor is fixed on the force sensor fixing frame, and the contact point of the miniature force sensor is in contact with the drooping end of the guide rod; the force sensor fixing frame is fixed to the base of the high and low temperature box through screws to ensure that there is no displacement change in the force sensor fixing frame.

[0006] As a further optimization scheme of the above-mentioned rolling bearing friction torque testing device, the drive unit includes a servo motor and an absolute encoder. The servo motor can control the driving speed from 0.5rpm to 3000rpm through the absolute encoder. The drive unit provides driving force for the test bearing, and the driving force is transmitted through the diaphragm coupling and drives the supporting shaft system to rotate.

[0007] As a further optimization scheme of the above-mentioned rolling bearing friction torque testing device, a support shaft system is provided on the right side of the test bearing friction torque testing assembly, and the test connecting shaft of the test bearing friction torque testing assembly is connected to the support shaft system through a thread and is used to measure the starting friction torque and operating friction torque of the rolling bearing.

[0008] As a further optimization solution of the above-mentioned rolling bearing friction torque test device, the test bearing friction torque test assembly is entirely arranged in a high and low temperature box, which provides and controls the temperature required for the test for the test bearing.

[0009] As a further optimization solution for the above-mentioned rolling bearing friction torque testing device, the temperature control range in the high and low temperature box is -50°C to 150°C.

[0010] As a further optimization scheme of the above-mentioned rolling bearing friction torque test device, a cylindrical high and low temperature box insulation sleeve is opened on the right side of the high and low temperature box, the connection part of the test connecting shaft and the support shaft system is arranged in the high and low temperature box insulation sleeve, and a heating ring is arranged in the outer bushing of the bearing on the left side of the support shaft system. The heating ring heats the support bearing bushing to ensure that the support bearing on the left side close to the high and low temperature box operates normally during the low temperature test.

[0011] As a further optimization solution of the above-mentioned rolling bearing friction torque test device, the device also includes a computer acquisition system for monitoring the rotational speed, starting friction torque, operating friction torque and environmental chamber temperature of the rolling bearing during the test.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model includes a drive unit, a diaphragm coupling, a support shaft system, a heating ring, a high and low temperature box insulation cover, a high and low temperature box, a test bearing friction torque test assembly and a frame. The present invention provides a rolling bearing friction torque test device with a simple structure, which can simulate the starting friction torque and operating friction torque test of the rolling bearing in high and low temperature environments.

[0014] 2. The main innovation of the present invention is that the test bearing friction torque test assembly includes a test bearing outer sleeve, a test bearing, a test connecting shaft, a test bearing inner ring pressure cover, a test bearing outer ring pressure cover, a guide rod, a miniature force sensor, a force sensor fixing frame and a high and low temperature box base. The test bearing friction torque test assembly is connected to the 3-support shaft system through a thread and is used to measure the starting friction torque and operating friction torque of the rolling bearing.

[0015] 3. The main innovation of the present invention is that the parameters such as the rotational speed, starting friction torque, operating friction torque, and environmental chamber temperature of the rolling bearing in the test are recorded through a computer acquisition system, saved and reported, and the specific parameters of the starting friction torque and operating friction torque of the rolling bearing in high and low temperature environments are accurately recorded, thereby enhancing the testing technical means and methods of rolling bearings in high and low temperature aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic cross-sectional view of a rolling bearing friction torque testing device of the present invention;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the test bearing friction torque test assembly;

[0018] Figure 3 This is a schematic diagram of the left side structure of the test bearing friction torque test assembly;

[0019] Markings in the figure: 1 is the drive unit; 2 is the diaphragm coupling; 3 is the supporting shaft system; 4 is the heating ring; 5 is the high and low temperature chamber insulation cover; 6 is the high and low temperature chamber; 7 is the test bearing friction torque test assembly; 7-1 is the test bearing outer bushing; 7-2 is the test bearing; 7-3 is the test connecting shaft; 7-4 is the test bearing inner ring pressure cover; 7-5 is the test bearing outer ring pressure cover; 7-6 is the guide rod; 7-7 is the miniature force sensor; 7-8 is the force sensor fixing bracket; 7-9 is the high and low temperature chamber base. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, Figure 1 This is a schematic diagram of the cross-sectional structure of a rolling bearing friction torque test device of the present invention; a rolling bearing friction torque test device includes a drive unit 1, a diaphragm coupling 2, a support shaft system 3, a heating ring 4, a high and low temperature box insulation cover 5, a high and low temperature box 6, a test bearing friction torque test assembly 7 and a frame 8.

[0022] like Figure 2 、 3 As shown, Figure 2 It is a schematic diagram of the cross-sectional structure of the test bearing friction torque test assembly; Figure 3 It is a side view structural diagram of a test bearing friction torque test assembly; the test bearing friction torque test assembly 7 includes a test bearing outer sleeve 7-1, a test bearing 7-2, a test connecting shaft 7-3, a test bearing inner ring pressure cover 7-4, a test bearing outer ring pressure cover 7-5, a guide rod 7-6, a micro force sensor 7-7, a force sensor fixing frame 7-8 and a high and low temperature box base 7-9, the inner ring of the test bearing 7-2 and the test connecting shaft 7-3 are installed through clearance fit, and the test bearing inner ring pressure cover 7-4 presses the inner ring of the test bearing 7-2 with screws to ensure that there is no relative rotation between the inner ring and the test connecting shaft 7-3; the test The outer ring of the bearing 7-2 and the outer sleeve of the test bearing 7-1 are installed with clearance fit, and the outer ring of the test bearing 7-2 is pressed and fixed by the test bearing outer ring cover 7-5 with screws to ensure that the outer ring and the outer sleeve of the test bearing 7-1 have no relative rotation; one end of the guide rod 7-6 is fixed to the outer sleeve of the test bearing 7-1 by a thread, and the other end is naturally drooped; the micro force sensor 7-7 is fixed to the force sensor fixing frame 7-8, and the contact point of the micro force sensor is in contact with the drooping end of the guide rod 7-6; the force sensor fixing frame 7-8 is fixed to the high and low temperature box base 7-9 by screws to ensure that the force sensor fixing frame 7-8 has no displacement change.

[0023] The driving unit 1 includes a servo motor and an absolute encoder. The servo motor can control the driving speed to be 0.5rpm to 3000rpm through the absolute encoder. The driving unit 1 provides driving force for the test bearing 7-2. The driving force is transmitted through the diaphragm coupling 2 and drives the support shaft system 3 to rotate.

[0024] The support shaft system 3 is supported by grease-lubricated bearings, lubricated with high-temperature grease, which ensures the bearings can operate at high temperatures. The heating ring 4 can heat the support bearing bushing to ensure that the support bearing on the left side near the high and low temperature box 6 can still operate normally during low-temperature testing.

[0025] A support shaft system 3 is provided on the right side of the test bearing friction torque test assembly 7. The test connecting shaft 7-3 of the test bearing friction torque test assembly 7 is connected to the support shaft system 3 through a thread and is used to measure the starting friction torque and operating friction torque of the rolling bearing.

[0026] The test bearing friction torque test assembly 7 is entirely disposed within a high-temperature and low-temperature chamber 6, which provides and controls the temperature required for the test bearing. The temperature control range within the high-temperature and low-temperature chamber 6 is -50°C to 150°C. The high-temperature and low-temperature chamber insulation sleeve 5 is used to isolate the exchange of internal and external gases to maintain a stable temperature within the environmental chamber. The connection between the test connecting shaft 7-3 and the support shaft system 3 is disposed within the high-temperature and low-temperature chamber insulation sleeve 5. A heating ring 4 is disposed within the outer bushing of the left bearing of the support shaft system 3. The heating ring 4 heats the support bearing bushing to ensure that the support bearing on the left side, close to the high-temperature and low-temperature chamber 6, operates normally during the low-temperature test.

[0027] The device also includes a computer acquisition system for monitoring the rotational speed, starting friction torque, operating friction torque, and environmental chamber temperature of the rolling bearing during the test. The computer acquisition system records the parameters such as the rotational speed, starting friction torque, operating friction torque, and environmental chamber temperature of the rolling bearing during the test, saves them, and generates a report.

[0028] Working Principle: Install the inner ring of the test bearing 7-2 with a clearance fit on the test connecting shaft 7-3. Use screws to tighten the inner ring of the test bearing using the inner ring cover 7-4, ensuring that the inner ring and the test connecting shaft 7-3 do not rotate relative to each other. Install the outer ring of the test bearing with a clearance fit on the outer bushing 7-1. Use screws to tighten the outer ring of the test bearing using the outer ring cover 7-5, ensuring that the outer ring and the outer bushing 7-1 do not rotate relative to each other. Thread one end of the guide rod 7-6 onto the outer bushing 7-1, while allowing the other end to hang down. Secure the micro force sensor 7-7 to the force sensor mounting bracket 7-8, with its contact point in contact with the lowered end of the guide rod 7-6. The force sensor mounting bracket 7-8 features various locations for securing the force sensor interface, facilitating the vertical movement of the micro force sensor 7-7 to test the friction torque of different bearing models. Fix the force sensor fixing frame 7-8 to the high and low temperature chamber base 7-9 with screws to ensure that the fixing frame does not move.

[0029] After all the test fixtures are installed in place, start the high and low temperature box 6 first, set the ambient temperature of the test bearing 7-2, and when the test ambient temperature is reached, start the servo motor and run it at a speed of 0.5rpm-10rpm. The guide rod connected to the outer ring bushing of the bearing is subjected to the friction force and rotates to press the maximum force value F measured by the force sensor. 启动 The starting friction torque M of the bearing can be obtained by the distance L from the core shaft to the center of the force sensor. 启动 When the servo motor rotates at the normal speed of the bearing, the guide rod is driven to rotate through the outer bushing, and the stable force value F is pressed on the force sensor. 运转 The product of the distance L from the core shaft to the center of the force sensor is the operating friction torque M of the bearing. 运转 .

[0030] The utility model has an ingenious design, a simple structure, and is convenient and practical. It can simulate the test of the starting friction torque and the operating friction torque of rolling bearings in high and low temperature environments, fills the gap in the bearing industry for the measurement of the friction torque of rolling bearings in high and low temperature environments, enhances the testing technical means and methods of rolling bearings in high and low temperature aspects, and solves the technical gaps in the existing measurement of the friction torque of rolling bearings in high and low temperature environments, the lack of testing technical means and methods, and the inability to accurately record the specific parameters of the starting friction torque and the operating friction torque of rolling bearings in high and low temperature environments. Compared with the existing technology, it has good market prospects and development space.

[0031] 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 rolling bearing friction torque test device, characterized by: The invention comprises a drive unit (1), a diaphragm coupling (2), a supporting shaft system (3), a heating ring (4), a high and low temperature box insulation sleeve (5), a high and low temperature box (6), a test bearing friction torque test assembly (7) and a frame (8), wherein the test bearing friction torque test assembly (7) comprises a test bearing outer sleeve (7-1), a test bearing (7-2), a test connecting shaft (7-3), a test bearing inner ring pressure cover (7-4), a test bearing outer ring pressure cover (7-5), a guide rod (7-6), a micro force sensor (7-7), a force sensor fixing frame (7-8) and a high and low temperature box base (7-9), wherein the inner ring of the test bearing (7-2) is installed with the test connecting shaft (7-3) through clearance fit, and the test bearing inner ring pressure cover (7-4) is screwed to the inner ring of the test bearing (7-2). The ring is pressed to ensure that there is no relative rotation between the inner ring and the test connecting shaft (7-3); the outer ring of the test bearing (7-2) and the test bearing outer sleeve (7-1) are installed through clearance fit, and the test bearing outer ring cover (7-5) presses and fixes the outer ring of the test bearing (7-2) through screws to ensure that there is no relative rotation between the outer ring and the test bearing outer sleeve (7-1); one end of the guide rod (7-6) is fixed to the test bearing outer sleeve (7-1) through threads, and the other end is naturally drooped; the micro force sensor (7-7) is fixed to the force sensor fixing frame (7-8), and the contact point of the micro force sensor is in contact with the drooping end of the guide rod (7-6); the force sensor fixing frame (7-8) is fixed to the high and low temperature box base (7-9) through screws to ensure that there is no displacement change of the force sensor fixing frame (7-8).

2. A rolling bearing friction torque testing device according to claim 1, characterized in that: The drive unit (1) includes a servo motor and an absolute encoder. The servo motor can control the driving speed to be 0.5 rpm to 3000 rpm through the absolute encoder. The drive unit (1) provides a driving force for the test bearing (7-2). The driving force is transmitted through the diaphragm coupling (2) and drives the support shaft system (3) to rotate.

3. The rolling bearing friction torque testing device according to claim 1, characterized in that: A supporting shaft system (3) is provided on the right side of the test bearing friction torque test assembly (7); a test connecting shaft (7-3) of the test bearing friction torque test assembly (7) is connected to the supporting shaft system (3) via a thread and is used to measure the starting friction torque and the operating friction torque of the rolling bearing.

4. The rolling bearing friction torque testing device according to claim 1, characterized in that: The test bearing friction torque test assembly (7) is entirely arranged in a high and low temperature box (6), and the high and low temperature box (6) provides and controls the temperature required for the test bearing.

5. A rolling bearing friction torque testing device according to claim 4, characterized in that: The temperature control range in the high and low temperature box (6) is -50°C to 150°C.

6. A rolling bearing friction torque testing device according to claim 4, characterized in that: A cylindrical high and low temperature box insulation sleeve (5) is provided on the right side of the high and low temperature box (6), and the connection portion between the test connecting shaft (7-3) and the support shaft system (3) is provided in the high and low temperature box insulation sleeve (5). A heating ring (4) is provided in the outer bushing of the left bearing of the support shaft system (3), and the heating ring (4) heats the support bearing bushing to ensure that the support bearing on the left side close to the high and low temperature box (6) operates normally during the low temperature test.

7. A rolling bearing friction torque testing device according to any one of claims 1 to 6, characterized in that: The device also includes a computer acquisition system for monitoring the rotational speed, starting friction torque, operating friction torque and environmental chamber temperature of the rolling bearing during the test.

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