Heavy-load large-torque bearing testing machine

Abstract

The utility model provides a heavy-load large-torque bearing testing machine, and relates to the technical field of bearing testing machines, the heavy-load large-torque bearing testing machine comprises a rack and a pump station, the pump station is arranged at the bottom end of the rack, the top surface of the rack is provided with a rotary motion mechanism, and the rotary motion mechanism comprises a motor seat and a main shaft seat installed on the surface of the rack. A direct-drive servo motor is arranged on the surface of the motor base, a spindle is arranged on the surface of the spindle base, a torque sensor is arranged on the top face of the rack, elastic couplings are arranged on the two sides of the torque sensor, and a loading supporting mechanism is arranged at the end, away from the direct-drive servo motor, of the top face of the rack. The loading supporting mechanism comprises a dovetail guide rail, a movable supporting seat is arranged in the dovetail guide rail, a hand wheel is arranged on the side face of the dovetail guide rail, a loading point offset assembly is arranged, offset of a loading point is achieved by adjusting a motor and a displacement actuator to move left and right, and data of a test piece during offset can be measured.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing testing machines, in particular to a heavy-duty large-torque bearing testing machine. Background Technique

[0002] Bearing testing is an essential and indispensable verification process in the bearing design and manufacturing process. On the bearing testing machine, according to the actual installation conditions and actual operating states of the bearing, that is, the rotational speed, axial load, radial load of the bearing, as well as the ambient temperature, lubrication state, etc., it is run according to the actual working conditions. It reaches the predetermined life or until the bearing fails. And the bearing testing machine is an important device for testing and analyzing the performance of bearings, including tests on aspects such as fatigue life, reliability, and tribological characteristics. These testing machines simulate the actual working conditions to conduct comprehensive performance tests on bearings to ensure their stability and reliability in various application scenarios;

[0003] Chinese Patent Publication No. CN206593858U discloses a bearing testing machine, which includes a load shaft for installing a test bearing. The load shaft is radially provided with a first installation hole on the installation section corresponding to the test bearing. A first vibration sensor and a first elastic member that always forces the first vibration sensor to have a tendency to move out of the first installation hole are arranged in the first installation hole;

[0004] In this existing design, although the temperature and vibration of the inner ring of the test bearing can be measured by directly installing and embedding the first vibration sensor and the temperature sensor in the first installation hole and the second installation hole radially opened on the load shaft, while facilitating installation, due to reducing the energy transfer in the middle of the test bearing, the detection accuracy is improved. The low-frequency analysis spectrum band of the test bearing is indirectly obtained by detecting the vibration of the load shaft through the second vibration sensor, and the high-frequency analysis spectrum band obtained by the first vibration sensor is used for comparative analysis to further improve the detection accuracy. The driving motor drives the driving bushing to rotate and directly acts on the test bearing to improve the energy transfer efficiency of the driving bushing, thereby improving the test accuracy. However, traditional bearing testing machines mostly have radial loading, that is, a force acts on the bearing in a direction perpendicular to the axis of the center. The function is relatively single. When it is necessary to measure the offset bearing capacity of the bearing, other equipment is required, which is not convenient for synchronous measurement;

[0005] Therefore, a heavy-duty large-torque bearing testing machine is designed to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the technical problems put forward in the above background technique.

[0007] The present utility model adopts the following technical solutions: A heavy-duty large-torque bearing testing machine, comprising a frame and a pumping station, the pumping station is arranged at the bottom end of the frame, a rotational motion mechanism is arranged on the top surface of the frame, the rotational motion mechanism includes a motor base and a main shaft base installed on the surface of the frame, a direct-drive servo motor is arranged on the surface of the motor base, a main shaft is arranged on the surface of the main shaft base, a torque sensor is arranged on the top surface of the frame, and elastic couplings are arranged on both sides of the torque sensor;

[0008] At one end of the top surface of the frame away from the direct-drive servo motor, a loading and supporting mechanism is arranged, the loading and supporting mechanism includes a dovetail guide rail, a moving support seat is arranged inside the dovetail guide rail, and a handwheel is arranged on the side surface of the dovetail guide rail.

[0009] As an optimization of the heavy-duty large-torque bearing testing machine of the present utility model, the torque sensor, the elastic couplings and the direct-drive servo motor are all connected in series.

[0010] As an optimization of the heavy-duty large-torque bearing testing machine of the present utility model, one end of the main shaft is provided with a friction pair assembly, and the other end of the friction pair assembly is connected to the rotating shaft section of the moving support seat.

[0011] As an optimization of the heavy-duty large-torque bearing testing machine of the present utility model, a clamping assembly and a secondary clamping assembly are arranged inside the friction pair assembly, and both the clamping assembly and the secondary clamping assembly are installed on the surface of the friction pair assembly.

[0012] As an optimization of the heavy-duty large-torque bearing testing machine of the present utility model, the secondary clamping assembly includes a sliding bearing and end covers installed on both sides of the sliding bearing, a cavity is formed between the sliding bearing and the end covers, and a water inlet and a water outlet are arranged on the surface of the end cover.

[0013] As an optimization of the heavy-duty large-torque bearing testing machine of the present utility model, a loading point offset mechanism is arranged on the bottom surface of the frame, the loading point offset mechanism includes a displacement actuator and an adjustment motor, the output end of the adjustment motor is connected to the surface of the displacement actuator, a load actuator is arranged on the surface of the displacement actuator, and an oil pressure sensor is arranged at the bottom end of the load actuator.

[0014] As an optimization of the heavy-duty large-torque bearing testing machine of the present utility model, the loading point offset mechanism is connected to the bottom end of the secondary clamping assembly.

[0015] Compared with the prior art, the advantages and positive effects of the present utility model are that,

[0016] 1. In the present utility model, the testing machine equipment adopts a horizontal frame and a simply supported beam structure, which is convenient for installation and improves work efficiency. A loading point offset component is provided. By adjusting the left and right movement of the motor and the displacement actuator, the offset of the loading point can be achieved, and the data when the test piece is offset can be measured. The movable support seat is set to be adjusted by a handwheel, which is convenient for adjusting the left and right movement of the movable support seat, meeting both the needs of the support structure and facilitating the positioning, clamping and disassembly of the friction pair component between the two support ends. The auxiliary clamping component is set as a whole and can be pre-installed as a whole, that is, the inner ring of the test piece is installed with the shaft, the outer ring of the bearing is installed with the inner sleeve, the inner sleeve and the bearing shaft are installed with the outer sleeve for positioning, and a cavity is formed by connecting with the left and right end covers, and water circulation is carried out through the water inlet and the water outlet, and water lubrication and dry friction tests can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of a heavy-duty large-torque bearing testing machine proposed by the present utility model.

[0018] LEGEND DESCRIPTION:

[0019] 1. Frame; 2. Pumping station;

[0020] 3. Rotary motion mechanism; 301. Motor seat; 302. Spindle seat; 303. Direct drive servo motor; 304. Spindle;

[0021] 4. Torque sensor; 5. Elastic coupling;

[0022] 6. Loading support mechanism; 601. Dovetail guide rail; 602. Movable support seat; 603. Handwheel;

[0023] 7. Friction pair component; 8. Clamping component;

[0024] 9. Auxiliary clamping component; 901. Sliding bearing; 902. End cover; 903. Water inlet; 904. Water outlet;

[0025] 10. Loading point offset mechanism; 1001. Displacement actuator; 1002. Adjusting motor; 1003. Load actuator; 1004. Oil pressure sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0028] Embodiment

[0029] Please refer to Figure 1 , the present utility model provides a technical solution: a heavy-duty large-torque bearing testing machine, including a frame 1 and a pumping station 2. The pumping station 2 is arranged at the bottom end of the frame 1. A rotary motion mechanism 3 is arranged on the top surface of the frame 1. The rotary motion mechanism 3 includes a motor base 301 and a main shaft base 302 installed on the surface of the frame 1. A direct-drive servo motor 303 is arranged on the surface of the motor base 301. A main shaft 304 is arranged on the surface of the main shaft base 302. One end of the main shaft 304 is provided with a friction pair assembly 7. Inside the friction pair assembly 7, a clamping assembly 8 and a secondary clamping assembly 9 are arranged. The left and right ends of the secondary clamping assembly 9 are rigidly connected to the main shaft 304 and the moving support base 602 respectively. The inner ring of the bearing rotates with the main shaft 304, and is hydraulically loaded to the required test force. The position of the loading point is adjusted by a loading point offset mechanism 10. The inner and outer rings of the bearing rotate relative to each other, and the frictional force is accurately measured by a torque sensor 4. This test force loading system adopts a hydraulic loading method, with a maximum of 450 KN, and can measure the test data of the test piece under a large bearing capacity. The secondary clamping assembly 9 includes a sliding bearing 901 and end covers 902 installed on both sides of the sliding bearing 901. A cavity is formed between the sliding bearing 901 and the end covers 902. Water inlets 903 and water outlets 904 are arranged on the surface of the end covers 902;

[0030] Both the clamping assembly 8 and the secondary clamping assembly 9 are installed on the surface of the friction pair assembly 7. The other end of the friction pair assembly 7 is connected to the rotating shaft section of the moving support base 602. A torque sensor 4 is arranged on the top surface of the frame 1. Elastic couplings 5 are arranged on both sides of the torque sensor 4. The torque sensor 4, the elastic couplings 5 and the direct-drive servo motor 303 are all connected in series. The detailed data of the test piece can be quickly obtained from the bearing capacity measured by the torque sensor 4, improving the working efficiency. A loading support mechanism 6 is arranged at one end of the top surface of the frame 1 away from the direct-drive servo motor 303. The loading support mechanism 6 includes a dovetail guide rail 601. A moving support base 602 is arranged inside the dovetail guide rail 601. A handwheel 603 is arranged on the side of the dovetail guide rail 601. A loading point offset mechanism 10 is arranged at the bottom surface of the frame 1. The loading point offset mechanism 10 is connected to the bottom end of the secondary clamping assembly 9. The loading point offset mechanism 10 includes a displacement actuator 1001 and an adjustment motor 1002. The output end of the adjustment motor 1002 is connected to the surface of the displacement actuator 1001. A load actuator 1003 is arranged on the surface of the displacement actuator 1001. An oil pressure sensor 1004 is arranged at the bottom end of the load actuator 1003.

[0031] Working principle: During use, place the test piece on the surface of the clamping mechanism and rotate the handwheel 603. The handwheel 603 drives the moving support base 602 to move within the dovetail guide rail 601 until the moving support base 602 clamps the test piece. Then, start the direct drive servo motor 303. The direct drive servo motor 303 drives the test piece to perform a rotational motion. During this process, the dynamic torque sensor 4 and the elastic coupling 5 are connected in series. The data of the test piece can be measured through the torque sensor 4. When installing the auxiliary clamping component 9, first install the inner ring of the test piece on the shaft, install the outer ring of the bearing on the installation inner sleeve, and then install and position the inner sleeve and the bearing on the outer sleeve. Install the end caps 902 at its left and right ends to form a cavity. Then, water circulation can be carried out through the water inlet 903 and the water outlet 904 for water lubrication. After discharging the liquid from the water outlet 904, a dry friction test can be carried out. By enabling the adjustment motor 1002, the adjustment motor 1002 drives the displacement actuator 1001 to move, thereby driving the load actuator 1003 to move. The load actuator 1003 drives the oil pressure sensor 1004 at its bottom end to move. The displacement actuator 1001 can drive the clamping component 8 to deflect. Then, the data is transmitted from the oil pressure sensor 1004 to the torque sensor 4, and thus the data of the test piece in the deflected state can be obtained.

[0032] The above is only the preferred embodiment of the present invention, and it is not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A heavy-load high-torque bearing testing machine, comprising a frame (1) and a pump station (2), characterized in that: The pump station (2) is arranged at the bottom end of the frame (1); a rotating motion mechanism (3) is arranged on the top surface of the frame (1); the rotating motion mechanism (3) comprises a motor seat (301) and a spindle seat (302) mounted on the surface of the frame (1); a direct-drive servo motor (303) is arranged on the surface of the motor seat (301); a spindle (304) is arranged on the surface of the spindle seat (302); a torque sensor (4) is arranged on the top surface of the frame (1); elastic couplings (5) are arranged on both sides of the torque sensor (4); A loading support mechanism (6) is arranged at one end of the top surface of the frame (1) away from the direct-drive servo motor (303), and the loading support mechanism (6) comprises a dovetail guide rail (601), a movable support seat (602) is arranged inside the dovetail guide rail (601), and a hand wheel (603) is arranged on the side of the dovetail guide rail (601).

2. The heavy-load and high-torque bearing testing machine according to claim 1, characterized in that: The torque sensor (4), the elastic coupling (5) and the direct-drive servo motor (303) are all connected in series.

3. The heavy-load high-torque bearing testing machine according to claim 2, characterized in that: A friction pair component (7) is disposed at one end of the main shaft (304), and the other end of the friction pair component (7) is connected to the rotating shaft section of the movable support seat (602).

4. The heavy-load high-torque bearing testing machine according to claim 3 is characterized in that: A clamping assembly (8) and a secondary clamping assembly (9) are arranged inside the friction pair assembly (7), and the clamping assembly (8) and the secondary clamping assembly (9) are both installed on the surface of the friction pair assembly (7).

5. The heavy-load and high-torque bearing testing machine according to claim 4, characterized in that: The auxiliary clamping assembly (9) comprises a sliding bearing (901) and end covers (902) installed on both sides of the sliding bearing (901), a cavity is formed between the sliding bearing (901) and the end covers (902), and a water inlet (903) and a water outlet (904) are provided on the surface of the end covers (902).

6. The heavy-load and high-torque bearing testing machine according to claim 5, characterized in that: The bottom surface of the frame (1) is provided with a loading point offset mechanism (10), the loading point offset mechanism (10) comprises a displacement actuator (1001) and an adjustment motor (1002), the output end of the adjustment motor (1002) is connected to the surface of the displacement actuator (1001), the surface of the displacement actuator (1001) is provided with a load actuator (1003), and the bottom end of the load actuator (1003) is provided with an oil pressure sensor (1004).

7. The heavy-load and high-torque bearing testing machine according to claim 6, characterized in that: The loading point offset mechanism (10) is connected to the bottom end of the auxiliary clamping assembly (9).

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