Bearing start-up friction torque measurement system and measurement method thereof

Abstract

The application discloses a bearing starting friction torque measuring system and a measuring method thereof. The system comprises a machine table and a bearing tool. The machine table is provided with a pre-load device and a friction torque measuring device. The bearing tool can be connected to the pre-load device. The friction torque measuring device comprises a bearing driving turntable and a torque measuring device. The bearing driving turntable is provided with a tool mounting mechanism. The bearing tool after pre-load can be clamped on the tool mounting mechanism. The torque measuring device can be connected to the tool mounting mechanism. The application clamps and positions the bearing product to be measured by the bearing tool. The pre-load loading operation of the bearing can be completed on the pre-load device. The working condition of the bearing is simulated. The bearing tool after pre-load can be mounted and fixed on the tool mounting mechanism. The relative movement of the inner and outer rings of the bearing is formed to realize the measurement of the friction torque. The application has the advantages of simple operation and convenient detection and can meet the requirement of accurately measuring the bearing starting friction torque data in the laboratory.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing quality inspection equipment, in particular to a bearing starting friction torque measuring system and a measuring method thereof. BACKGROUND

[0002] The bearing is an important part of supporting the mechanical structure for rotary motion, and is widely used in modern mechanical equipment. The main function of the bearing is to reduce the friction coefficient of the mechanical structure in rotary motion and to ensure the rotary precision.

[0003] The bearing friction torque is a main performance index of the bearing, which represents the size of the bearing friction resistance. The quality of the bearing friction directly affects the service life of the bearing. The friction resistance of some bearings used in high-tech equipment (such as gyro bearing, satellite despinning antenna bearing, flight platform bearing, etc.) is an important factor affecting the reliability and accuracy of the main machine control system. Therefore, it is very important to detect the friction resistance of bearing products in the laboratory. When the bearing rotates, the friction torque value at the start is the largest. Therefore, the starting friction torque of the bearing is generally detected in the laboratory. How to quickly, conveniently and accurately detect the starting friction torque of the bearing product has become an urgent need of enterprises, and the present application is thus born. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a bearing starting friction torque measuring system and a measuring method thereof.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A bearing starting friction torque measuring system comprises a machine table, a bearing tooling, a pre-load device and a friction torque measuring device installed on the machine table, and the bearing tooling can clamp a bearing product to be measured. The bearing tooling can be connected to the pre-load device to complete the load preset operation. The friction torque measuring device comprises a bearing driving turntable and a torque measuring device. The bearing driving turntable is rotatably installed on the machine table, and the bearing driving turntable is provided with a tooling mounting mechanism. The bearing tooling after the preset load can be clamped on the tooling mounting mechanism. The torque measuring device can be connected with the tooling mounting mechanism to complete the measurement of the starting friction torque data during the rotation of the bearing.

[0007] The bearing tooling includes a first bearing chuck, a second bearing chuck, a load sensor and a loading screw, the bearing product to be measured is clamped between the first bearing chuck and the second bearing chuck, the second bearing chuck is stacked with a loading pressure seat, the load sensor is installed on the loading pressure seat, the load sensor is pressed on a sensor pressure disc, and the loading screw is threadedly connected to the sensor pressure disc after penetrating through the first bearing chuck, the second bearing chuck and the loading pressure seat.

[0008] The first bearing chuck and the second bearing chuck only press the bearing inner ring of the bearing product to be measured, and the rotational movement of the bearing outer ring of the bearing product to be measured is not limited.

[0009] The preloading device includes a tooling installation base and a load measuring instrument, the bearing tooling can be integrally fixed and installed on the tooling installation base, the bearing tooling is installed and placed in a form with the loading screw rod head upward, and the load sensor on the bearing tooling can be connected with the load measuring instrument circuit.

[0010] The tooling installation mechanism includes a tooling support assembly and a bearing outer ring pressing assembly, the bearing tooling can be placed on the tooling support assembly, and the bearing outer ring pressing assembly cooperates to complete the positioning installation of the bearing tooling.

[0011] The tooling support assembly includes a plurality of evenly distributed movable support seats, a plurality of guide rails are evenly connected to the bearing driving turntable, the movable support seats and the guide rails are one-to-one correspondingly arranged, the movable support seats are supported at the bottom end surface position of the bearing outer ring of the bearing product to be measured, a clamping limiting baffle is connected to the movable support seat, and the inner side end surface of the clamping limiting baffle can be in contact with the outer peripheral wall of the bearing outer ring of the bearing product to be measured.

[0012] The bearing outer ring pressing assembly includes an outer ring pressing disc and a pressing rod positioning mechanism, the outer ring pressing disc is a ring-shaped disc, the outer ring pressing disc can be press-fitted on the top end surface of the bearing outer ring of the bearing product to be measured, a plurality of pressing rod positioning mechanisms are evenly installed on the bearing driving turntable, and the pressing rod positioning mechanisms can form a pressing force on the outer ring pressing disc.

[0013] A lifting head is installed on the torque measuring equipment, a detection rotating rod is rotatably installed on the lifting head, a torque sensor is installed on the detection rotating rod, the friction torque measuring device further includes a data receiving analyzer, the torque sensor is connected to the data receiving analyzer in a circuit, a detection transmission disc is connected to the bottom of the detection rotating rod, a column slot is formed in the detection transmission disc, a detection driving column is vertically connected to the sensor pressure disc of the bearing tooling, the detection driving column is eccentrically installed, the bearing tooling is installed on the tooling installation mechanism in a form with the detection driving column upward, and after the detection transmission disc is lowered, the detection driving column can be inserted into the column slot.

[0014] A bearing starting friction torque determination method, adopts bearing starting friction torque determination system to carry out determination experiment, its method steps are as follows:

[0015] (a), split bearing tooling, clamps the bearing to be measured in bearing tooling;

[0016] (b), first bearing load preset operation is carried out, bearing tooling is fixedly installed to tooling installation base, load sensor wiring is connected to load determination instrument, loading screw is screwed, and the first bearing chuck and the second bearing chuck are further clamped to the bearing to be measured, and the reading change on the load determination instrument is observed until the required load value is adjusted;

[0017] (c), bearing tooling is disassembled to tooling installation mechanism and installed, the lifting head of torque determination equipment is started downward, and the detection drive column on the bearing tooling can be inserted and connected to the detection transmission disc of the lifting head;

[0018] (d), the bearing drive turntable is started to rotate, the rotating speed of the bearing drive turntable is -r / min, and continuous test is -min;

[0019] (e), data collection is completed, and the bearing tooling is disassembled, and new bearing is replaced.

[0020] The beneficial effects of the present application are: the present application clamps and positions the bearing product to be measured through bearing tooling, the bearing tooling can be installed on the preload device to complete the preload loading operation of the bearing, the working condition of the bearing is simulated, and the bearing tooling after preloading can also be fixedly installed on the tooling installation mechanism, the relative movement of the inner and outer rings of the bearing is formed to realize the determination of the friction torque, the present application has the advantages of simple operation and convenient detection, and can meet the needs of precise determination of bearing starting friction torque data in the laboratory. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the front view of the present application;

[0022] Figure 2 It is the installation layout top view of each component on the bearing drive turntable of the present application

[0023] Figure 3 It is the structural schematic view of the bearing tooling of the present application;

[0024] Figure 4 It is the structural schematic view of the bearing tooling of the present application when being fixedly installed.

[0025] In the figure: machine table 1, pre-load device 2, tool mounting base 21, load measuring instrument 22, friction torque measuring device 3, bearing driving turntable 31, guide rail 311, tool mounting mechanism 32, tool support assembly 321, moving support base 3211, clamping limiting baffle 3212, bearing outer ring pressing assembly 322, outer ring pressing disc 3221, pressing rod positioning mechanism 3222, torque measuring equipment 33, elevator head 331, detection rotating rod 332, torque sensor 3321, detection transmission disc 333, column slot 3331, data receiving analyzer 34, bearing tool 4, first bearing chuck 41, second bearing chuck 42, loading pressing seat 43, load sensor 44, sensor pressing disc 45, detection driving column 451, loading screw 46. DETAILED DESCRIPTION

[0026] The application will be further described below in conjunction with the drawings and specific embodiments. In the application, "left", "right" and the like are described with reference to the following directions: Figure 1

[0027] As shown in Figures 1-4 , a bearing starting friction torque measuring system includes a machine table 1 and a bearing tool 4. The machine table 1 is provided with a pre-load device 2 and a friction torque measuring device 3. The bearing tool 4 can clamp a bearing product to be measured. The bearing product cannot be directly taken for measurement experiment. Therefore, the application designs a tool to cooperate with the experiment. Since the bearing is used under load, it is necessary to pre-load before measurement experiment. In this way, the actual working condition can be simulated as much as possible, and the accuracy of the measurement data is improved. In the application, the bearing tool 4 can be connected to the pre-load device 2 to complete the load pre-setting operation. The bearing after pre-setting load is taken for friction torque measurement. The friction torque measuring device 3 includes a bearing driving turntable 31 and a torque measuring equipment 33. The bearing driving turntable 31 is rotatably installed on the machine table 1. The bearing driving turntable 31 is provided with a tool mounting mechanism 32. The bearing tool 4 after pre-setting load can be clamped on the tool mounting mechanism 32. The torque measuring equipment 33 can be connected with the tool mounting mechanism 32, so as to complete the measurement of the starting friction torque data during the rotation of the bearing. The application has the advantages of simple operation and convenient detection. The use condition of the bearing can be simulated through pre-setting load, which can meet the demand of accurately measuring the starting friction torque data of the bearing in the laboratory.

[0028] As shown in Figure 3 ​As shown, the bearing tooling 4 includes a first bearing chuck 41, a second bearing chuck 42, a load sensor 44 and a loading screw 46, the bearing product to be tested is clamped between the first bearing chuck 41 and the second bearing chuck 42, the loading pressure seat 43 is stacked on the second bearing chuck 42, the load sensor 44 is installed on the loading pressure seat 43, the sensor pressure plate 45 is pressed on the load sensor 44, and the loading screw 46 is screwed on the sensor pressure plate 45 after penetrating through the first bearing chuck 41, the second bearing chuck 42 and the loading pressure seat 43. When the loading screw 46 is loosened and removed, the bearing tooling 4 can be disassembled, so that the bearing product to be tested can be smoothly loaded into the bearing tooling 4. When the loading screw 46 is tightened, the first bearing chuck 41, the second bearing chuck 42 and the bearing product to be tested can be clamped and fixed by driving the load sensor 44, the loading pressure seat 43 and the second bearing chuck 42 through the sensor pressure plate 45. The tighter the loading screw 46 is tightened, the greater the clamping force on the bearing product to be tested (also representing the greater preset load). Since the load sensor 44 is clamped between the sensor pressure plate 45 and the loading pressure seat 43, the clamping force data can be measured by the load sensor 44.

[0029] As shown in Figure 2 , the first bearing chuck 41 and the second bearing chuck 42 only press the bearing inner ring of the bearing product to be tested, that is, the bearing tooling 4 is clamped, and the bearing tooling 4 and the bearing inner ring are integrated (can move synchronously). Since the bearing outer ring of the bearing product to be tested is not pressed, the rotational movement of the bearing outer ring is not limited, and the bearing outer ring can be rotated. The above design is to facilitate the subsequent friction torque measurement experiment, which will be introduced in the subsequent content.

[0030] As shown in Figure 1 , the preloading device 2 includes a tooling installation base 21 and a load measuring instrument 22. The bearing tooling 4 can be integrally fixed and installed on the tooling installation base 21. The bearing tooling 4 is installed and placed with the loading screw 46 rod head facing upwards, so that the tool can be used to tighten the loading screw 46. The load sensor 44 on the bearing tooling 4 can be connected to the load measuring instrument 22 in line, so that the experimenter can observe the value of the preset load in real time. When the preloading device 2 is operated, the experimenter tightens the loading screw 46 with the tool (tightening can form a larger clamping force on the bearing inner ring, which increases the load of the bearing. This operation is to simulate the actual use condition, so that the subsequent friction torque detection structure is more accurate), and observes the data of the load measuring instrument 22 at the same time. Until the data meets the predetermined standard requirement.

[0031] As shown in Figure 1 and Figure 2As shown, the tool mounting mechanism 32 comprises a tool support assembly 321 and a bearing outer ring pressing assembly 322, the bearing tool 4 can be placed on the tool support assembly 321, and the bearing outer ring pressing assembly 322 cooperates to complete the positioning installation of the bearing tool 4. Before the bearing is measured, the position of the bearing needs to be positioned first. The above-mentioned requirement is realized by positioning and installing the bearing tool 4.

[0032] As shown in Figure 2 and Figure 4 , the tool support assembly 321 comprises a plurality of evenly distributed moving support seats 3211 (at least three, three points determine a stable plane, which can ensure stable support), and a plurality of guide rails 311 are evenly connected on the bearing driving turntable 31. The moving support seat 3211 and the guide rail 311 are arranged one by one, the moving support seat 3211 is slidably installed on the guide rail 311, the moving support seat 3211 is supported at the bottom end surface position of the bearing outer ring of the bearing product to be measured, and the clamping limiting baffle 3212 is connected on the moving support seat 3211. The inner side end surface of the clamping limiting baffle 3212 can be in contact with the outer peripheral wall of the bearing outer ring of the bearing product to be measured, and the upper end surface of the moving support seat 3211 is only used to support the outer ring of the bearing. The clamping limiting baffle 3212 is used to limit the bearing outer ring, and the inner side end surface of the clamping limiting baffle 3212 is matched with the size of the outer peripheral wall of the bearing outer ring. After the three clamping limiting baffles 3212 are synchronously close to contact, the effect of clamping and limiting the bearing outer ring is formed.

[0033] As shown in Figure 2 and Figure 4 , the bearing outer ring pressing assembly 322 comprises an outer ring pressing disc 3221 and a pressing rod positioning mechanism 3222, the outer ring pressing disc 3221 is a ring-shaped disc, and the outer ring pressing disc 3221 can be press-fitted on the top end surface of the bearing outer ring of the bearing product to be measured. A plurality of pressing rod positioning mechanisms 3222 are evenly installed on the bearing driving turntable 31, the pressing rod positioning mechanism 3222 can form a pressing force on the outer ring pressing disc 3221, the pressing rod positioning mechanism 3222 can manually press the outer ring pressing disc 3221, and the pressing rod positioning mechanism 3222 has many styles on the market, which will not be introduced here. The outer ring pressing disc 3221 can form at least downward pressing effect (also for the bearing outer ring). Through the cooperation of the tool support assembly 321 and the bearing outer ring pressing assembly 322, the bearing outer ring can be firmly positioned and fixed by the tool mounting mechanism 32. Since only the bearing outer ring is fixed, the bearing inner ring and the bearing tool 4 can remain rotatable.

[0034] As shown in Figure 1 and Figure 4As shown, the torque measuring device 33 is provided with a lifter head 331, the lifter head 331 is rotatably provided with a detection rotating rod 332, the detection rotating rod 332 is provided with a torque sensor 3321, the friction torque measuring device 3 further comprises a data receiving analyzer 34, the torque sensor 3321 is connected to the data receiving analyzer 34, and the detected data can be transmitted to the data receiving analyzer 34 for analysis and display, the bottom of the detection rotating rod 332 is connected with a detection transmission disc 333, the detection transmission disc 333 is provided with a column slot 3331, the sensor pressing disc 45 of the bearing tooling 4 is vertically connected with a detection driving column 451, the detection driving column 451 is eccentrically installed, the bearing tooling 4 is installed on the tooling mounting mechanism 32 in the form that the detection driving column 451 faces upward, after the detection transmission disc 333 is lowered, the detection driving column 451 can be inserted into the column slot 3331, and the bearing tooling 4 is connected with the torque measuring device 33, when the detection experiment is carried out by using the application, the bearing driving disc 31 rotates at a low speed, since the tooling mounting mechanism 32 is connected with the bearing driving disc 31, the tooling mounting mechanism 32 can rotate with the bearing driving disc 31, since the bearing outer ring is positioned and fixed by the tooling mounting mechanism 32, the bearing outer ring can be driven to rotate, under the condition that the bearing outer ring rotates, the bearing inner ring also has a tendency to rotate together, since the detection driving column 451 of the bearing tooling 4 is inserted into the detection transmission disc 333, the rotation of the bearing inner ring has a relative resistance (the bearing inner ring and the bearing tooling 4 need to move integrally), under the action of the resistance, the bearing inner ring does not rotate (or only slightly rotates), in this process, the rotation tendency of the bearing inner ring is reflected on the detection rotating rod 332 connected with the detection transmission disc 333, and finally the friction torque data is output by the torque sensor 3321, since the experiment starts to detect from the moment that the bearing outer ring starts to rotate, the test experimental data is the starting friction torque data of the bearing, the starting friction torque is larger than the running friction torque, and the starting friction torque can more accurately reflect the friction resistance of the bearing.

[0035] A bearing starting friction torque measuring method, which adopts the bearing starting friction torque measuring system to carry out the measuring experiment, and the method steps are as follows:

[0036] (a), the loading screw 46 on the bearing tooling 4 is taken out, the bearing tooling 4 is disassembled, the bearing to be detected is clamped in the bearing tooling 4, and then is locked and fixed, the bearing tooling 4 only clamps the bearing inner ring, after the bearing is installed, the bearing outer ring is pushed slightly to ensure that the bearing outer ring is not pressed and covers, and can rotate freely;

[0037] (b) first, the load preset operation of the bearing is carried out, the bearing tool 4 is fixed and installed on the tool mounting base 21 in the form that the rod head of the loading screw 46 is upward, the load sensor 44 is connected to the load measuring instrument 22, the rod head of the loading screw 46 is screwed by a tool, the first bearing chuck 41 and the second bearing chuck 42 further clamp the bearing to be measured, and the change of the reading on the load measuring instrument 22 is observed until the required load value is adjusted, the application of the load can simulate the actual use condition of the bearing, and accurate experimental data can be obtained;

[0038] (c) the bearing tool 4 after preloading is disassembled and mounted on the tool mounting mechanism 32, the tool mounting mechanism 32 only positions the bearing outer ring, after the mounting is completed, the bearing tool 4 needs to be pushed slightly to ensure that only the bearing outer ring is fixed, and the bearing inner ring and the bearing tool 4 can rotate freely, then the elevator head 331 of the torque measuring device 33 is started downward, the detection driving column 451 on the bearing tool 4 can be inserted and connected to the detection transmission disc 333 of the elevator head 331, and the transmission butt joint of the bearing tool 4 and the torque measuring device 33 is completed;

[0039] (d) the bearing driving turntable 31 power mechanism is installed in the machine table 1, after the above step is completed, the bearing driving turntable 31 can be started to rotate, the rotating speed of the bearing driving turntable 31 is 3-5 revolutions per minute, and the continuous test is carried out for 2-3 minutes, the bearing driving turntable 31 can drive the rotation of the bearing outer ring through the tool mounting mechanism 32, the rotation of the bearing outer ring can bring the rotation trend of the bearing inner ring under the action of the friction force, since the bearing inner ring (the bearing tool 4) is in transmission connection with the torque measuring device 33, the starting friction resistance of the bearing can be measured at this time;

[0040] (e) after the data collection is completed, the bearing tool 4 is disassembled, and a new bearing is replaced.

[0041] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bearing start-up friction torque measurement system, comprising a machine table (1), a bearing tooling (4), characterized in that: The machine table (1) is provided with a pre-load device (2) and a friction torque measuring device (3), the bearing tooling (4) is provided with a bearing product to be measured, the bearing tooling (4) is connected to the pre-load device (2) to complete the load preset operation, the friction torque measuring device (3) comprises a bearing driving turntable (31) and a torque measuring device (33), the bearing driving turntable (31) is rotatably installed on the machine table (1), the bearing driving turntable (31) is provided with a tooling mounting mechanism (32), the bearing tooling (4) after the preset load is clamped on the tooling mounting mechanism (32), the torque measuring device (33) is connected with the tooling mounting mechanism (32) to complete the measurement of the starting friction torque data during the rotation of the bearing, the bearing tooling (4) comprises a first bearing chuck (41), a second bearing chuck (42), a load sensor (44), a sensor pressure plate (45), a detection driving column (451) and a loading screw rod (46), the bearing product to be measured is clamped between the first bearing chuck (41) and the second bearing chuck (42), the second bearing chuck (42) is provided with a loading pressure seat (43), the load sensor (44) is installed on the loading pressure seat (43), the load sensor (44) is provided with the sensor pressure plate (45), the loading screw rod (46) penetrates through the first bearing chuck (41), the second bearing chuck (42) and the loading pressure seat (43) and is threadedly connected with the sensor pressure plate (45), the first bearing chuck (41) and the second bearing chuck (42) only press the bearing inner ring of the bearing product to be measured, and the rotation of the bearing outer ring of the bearing product to be measured is not limited, the pre-load device (2) comprises a tooling mounting base (21) and a load measuring instrument (22), and the torque measuring device (33) comprises a lifting head (331) and a detection transmission disc (333).

2. A bearing start-up friction torque measurement system as claimed in claim 1, characterized in that: The bearing tooling (4) is integrally fixedly installed on the tooling mounting base (21), the bearing tooling (4) is installed and placed in a mode that the rod head of the loading screw rod (46) faces upward, and the load sensor (44) on the bearing tooling (4) is connected with the load measuring instrument (22) in a line.

3. A bearing start-up friction torque measurement system as in claim 1, wherein: The tooling mounting mechanism (32) comprises a tooling supporting assembly (321) and a bearing outer ring pressing assembly (322), the bearing tooling (4) is placed on the tooling supporting assembly (321), and the bearing outer ring pressing assembly (322) cooperates to complete the positioning and installation of the bearing tooling (4).

4. A bearing start-up friction torque measurement system as claimed in claim 3, characterized in that: The tool support assembly (321) comprises a plurality of evenly arranged movable support seats (3211), a plurality of guide rails (311) are evenly connected on the bearing driving turntable (31), the movable support seats (3211) are arranged one by one with the guide rails (311), the movable support seats (3211) are supported on the bottom end surface position of the bearing outer ring of the bearing product to be measured, the movable support seats (3211) are connected with clamping limiting baffle plates (3212), and the inner side end surface of the clamping limiting baffle plate (3212) is in contact with the outer peripheral wall of the bearing outer ring of the bearing product to be measured.

5. A bearing start-up friction torque measurement system as in claim 3, wherein: The bearing outer ring pressing assembly (322) comprises an outer ring pressing disc (3221) and a pressing rod positioning mechanism (3222), the outer ring pressing disc (3221) is a ring-shaped disc, the outer ring pressing disc (3221) is press-fitted on the top end surface of the bearing outer ring of the bearing product to be measured, a plurality of pressing rod positioning mechanisms (3222) are evenly arranged on the bearing driving turntable (31), and the pressing rod positioning mechanisms (3222) form the pressing force of the outer ring pressing disc (3221).

6. A bearing start-up friction torque measurement system as in claim 1, wherein: The torque measuring device (33) is provided with a lifting head (331), the lifting head (331) is rotatably provided with a detection rotating rod (332), the detection rotating rod (332) is provided with a torque sensor (3321), the friction torque measuring device (3) further comprises a data receiving analyzer (34), the torque sensor (3321) is connected to the data receiving analyzer (34) through a line, the bottom of the detection rotating rod (332) is connected with a detection transmission disc (333), the detection transmission disc (333) is provided with a stand inserting groove (3331), the sensor pressing disc (45) of the bearing tooling (4) is vertically connected with a detection driving stand (451), the detection driving stand (451) is eccentrically arranged, the bearing tooling (4) is arranged on the tooling mounting mechanism (32) in a state that the detection driving stand (451) faces upwards, and after the detection transmission disc (333) is lowered, the detection driving stand (451) is inserted into the stand inserting groove (3331).

7. A method of determining a bearing start-up friction torque, characterized by: The bearing starting friction torque measuring system is used for measuring experiments, and the method steps are as follows: (a) disassemble the bearing tooling (4), and clamp the bearing to be measured in the bearing tooling (4); (b) first, the load presetting operation of the bearing is performed, the bearing tooling (4) is fixedly arranged on the tooling mounting base (21), the load sensor (44) is connected to the load measuring instrument (22) through a line, the loading screw rod (46) is screwed, the first bearing chuck (41) and the second bearing chuck (42) are clamped to the bearing to be measured, the reading change on the load measuring instrument (22) is observed, and the required load value is adjusted. (c), bearing tooling (4) is disassembled to tooling installation mechanism (32) installation, starting torque measuring equipment (33) elevator head (331) downward, make the detection drive column (451) on bearing tooling (4) plug-in connection to the detection transmission disc (333) of elevator head (331); (d), starting bearing drive turntable (31) rotation, the rotational speed of bearing drive turntable (31) is 3-5 revolutions per minute, continuous test 2-3 minutes; (e), complete data collection, dismount bearing tooling (4), replace new bearing.

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