A bearing axial play measuring device and method

Abstract

The application provides a bearing axial clearance measuring device, which comprises an outer ring supporting unit, an inner ring supporting unit, a synchronous lifting unit and sliding mechanisms; the outer ring supporting unit comprises a plurality of outer ring supporting tables for supporting the outer ring of a bearing, and the inner ring supporting unit comprises a plurality of inner ring supporting tables for supporting the inner ring of the bearing; the synchronous lifting unit is arranged on the inner ring supporting unit, and the plurality of sliding mechanisms are movably connected with the outer ring supporting tables and the inner ring supporting tables respectively. The application also provides a bearing axial clearance measuring method, which comprises the following steps: horizontally placing the bearing on the outer ring supporting tables of the outer ring supporting unit, so that the inner ring of the bearing is hung downward, adjusting the synchronous lifting unit, and completing the bearing axial clearance measurement. The application can uniformly support the bearing with large size and large weight during the bearing axial clearance measurement, can conveniently realize the measurement of the bearing axial clearance, and can be suitable for the clearance measurement of main bearings with different diameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of component detection, in particular to a bearing axial clearance measuring device and method. BACKGROUND

[0002] The main bearing of a heading machine is a core component of the heading machine under the harsh working condition of breaking rock, and has high bearing capacity requirements. The currently developed main bearing of the heading machine has a maximum outer diameter of Φ10m, and has the characteristics of large diameter, heavy weight, and high precision requirements. Before the main bearing is assembled to the heading machine, a large number of use characteristic tests need to be carried out to ensure the reliability and stability of the working.

[0003] The internal clearance of a rolling bearing is an important use characteristic, and has a great influence on the fatigue life, rigidity, vibration, noise, temperature rise and mechanical normal running accuracy of the bearing.

[0004] For commonly used small size bearings, mature measuring devices have been formed in the prior art, but for the clearance measurement of the main bearing of the heading machine, due to the large size and heavy weight of the bearing itself, and the very small axial clearance of the bearing (usually 1mm-2mm), convenient and effective measurement cannot be achieved. Moreover, different types of heading machines have different specifications of main bearings, and each specification of main bearing needs to produce corresponding clearance measuring devices, which has a very high manufacturing cost.

[0005] In view of the above, there is an urgent need for a bearing axial clearance measuring device and method to solve the problems existing in the prior art. SUMMARY

[0006] The present application aims to provide a bearing axial clearance measuring device and method to solve the problem of inconvenient axial clearance measurement of the main bearing of the heading machine.

[0007] To achieve the above-mentioned purpose, the present application provides a bearing axial clearance measuring device, comprising an outer ring support unit, an inner ring support unit, a synchronous lifting unit and a sliding mechanism; the outer ring support unit comprises a plurality of outer ring support tables for supporting the outer ring of the bearing, and the inner ring support unit comprises a plurality of inner ring support tables for supporting the inner ring of the bearing; the synchronous lifting unit is arranged on the inner ring support unit and is used to realize the relative movement of the inner ring and the outer ring of the bearing in the axial direction; a plurality of sliding mechanisms are movably connected with the outer ring support tables and the inner ring support tables respectively, and are used to realize the sliding of the outer ring support tables and the inner ring support tables along the radial direction of the bearing.

[0008] Preferably, the synchronous lifting unit comprises a driving motor and a plurality of lifting mechanisms, and the plurality of lifting mechanisms are arranged in parallel on the input end and the output end of the driving motor.

[0009] A plurality of lifting mechanisms are arranged one by one on a plurality of inner ring support tables.

[0010] Preferably, the bearing axial clearance measuring device further comprises a pressure sensor and a control module; the lifting mechanism is a self-locking hydraulic cylinder, and each lifting mechanism is provided with a pressure sensor at the top; the pressure sensor and the driving motor are connected with the control module.

[0011] Preferably, each lifting mechanism is correspondingly provided with a hydraulic valve and a hydraulic oil pump, and the hydraulic valve and the hydraulic oil pump are connected with the control module.

[0012] Preferably, the bearing axial clearance measuring device further comprises a detection element connected with the control module, and the detection element comprises a displacement sensor for detecting the bearing axial clearance.

[0013] The detection element further comprises a level.

[0014] Preferably, the bearing axial clearance measuring device further comprises a display module connected with the control module.

[0015] Preferably, the sliding mechanism comprises a centering sliding rail, and the centering sliding rails of the plurality of sliding mechanisms are uniformly arranged in a diverging manner along the circumference of the bearing, and each centering sliding rail is slidably provided with an outer ring support table and an inner ring support table.

[0016] The application further provides a bearing axial clearance measuring method, which adopts the bearing axial clearance measuring device.

[0017] Step A: adjusting the positions of the outer ring support table and the inner ring support table on the sliding mechanism, so that the outer ring support table and the inner ring support table are uniformly arranged along the circumference of the bearing; placing the outer ring of the bearing to be measured on the outer ring support table of the outer ring support unit, so that the inner ring of the bearing is suspended downward;

[0018] Step B: adjusting the initial position of the lifting mechanism in the synchronous lifting unit, so that the top of the lifting mechanism is in contact with the lower surface of the inner ring of the bearing; when it is detected that the value of the pressure sensor at the top of the lifting mechanism changes from zero, stopping the action of the lifting mechanism;

[0019] Step C: zeroing the pressure sensor and the displacement sensor; starting the synchronous lifting unit, and the lifting mechanism lifts the inner ring of the bearing; when the pressure value detected by the pressure sensor is above the set threshold, the lifting mechanism stops lifting, and the bearing axial clearance measured by the displacement sensor is obtained.

[0020] Preferably, the step A further comprises: before placing the bearing, detecting whether the top surfaces of all the outer ring support tables are on the same horizontal plane by using the level; and detecting whether the top surfaces of the lifting mechanisms on all the inner ring support tables are on the same horizontal plane by using the level.

[0021] After placing the bearing, the outer ring and the inner ring of the bearing are detected by the level meter to determine whether they are in a horizontal state.

[0022] Preferably, in step C, the inner ring of the bearing is uniformly raised by the lifting mechanism, and the threshold value X is determined by expression 1):

[0023] X = M / n 1);

[0024] Wherein, M is the total mass of the bearing, and n is the total number of the lifting mechanism.

[0025] The technical scheme of the application has the following beneficial effects:

[0026] (1) In the present application, by setting the outer ring support unit and the inner ring support unit, uniform support of large-size and heavy bearings can be achieved during bearing axial clearance measurement. The lifting of the inner ring is realized by the synchronous lifting unit, which can conveniently push the inner ring of the bearing from one limit position to another limit position, and the measurement of the bearing axial clearance can be conveniently realized. By connecting the inner ring support table, the outer ring support table and the sliding mechanism, the outer ring support table and the inner ring support table can slide along the radial direction of the bearing, the distance between the outer ring support table and the inner ring support table can be adjusted, so that the clearance measurement of the main bearing of different diameter specifications can be realized, and the universality of the bearing axial clearance measurement equipment is improved.

[0027] (2) In the present application, the centering sliding rails of the plurality of sliding mechanisms are uniformly arranged in a divergent manner along the circumference of the bearing, and the outer ring support table and the inner ring support table are slidably arranged on each centering sliding rail, which can realize uniform support of the bearing.

[0028] (3) In the present application, the plurality of lifting mechanisms are connected in parallel at the input end and the output end of the driving motor, which facilitates the driving motor to send synchronous control signals to the plurality of lifting mechanisms, and realizes the synchronous lifting of the plurality of lifting mechanisms during measurement.

[0029] (4) In the present application, by embedding the lifting mechanism in the inner ring support table, the space occupancy rate of the lifting mechanism can be reduced.

[0030] (5) In the application, the lifting mechanism is a self-locking hydraulic cylinder, and the top of each lifting mechanism is provided with a pressure sensor for detecting the support force provided by the single lifting mechanism to the inner ring. The pressure sensor and the driving motor are connected with the control module. When the inner ring is lifted to the limit position upward, the inner ring will be subjected to the force of other parts due to the connection between the inner ring and other parts, thereby exerting greater pressure on the lifting mechanism. At this time, the pressure value collected by the pressure sensor will change suddenly, and the control module will control the driving motor to stop the lifting mechanism from continuing to lift and realize self-locking, so that intelligent measurement can be realized, errors caused by observing whether the inner ring has been lifted to the limit position by the human eye can be avoided, and automatic, convenient and accurate measurement of the axial clearance can be realized.

[0031] (6) In the application, the displacement sensor can be arranged on the outer ring, the inner ring or the lifting mechanism, and is used for detecting the bearing axial clearance, so that high-precision measurement of the bearing axial clearance can be realized.

[0032] (7) In the application, the level meter can be used for measuring the straightness and flatness of the outer ring support table, the inner ring support table and the inner surface of the bearing, and can be used for measuring the correctness of the installation position of the equipment and a small inclination angle, so that the horizontal position adjustment of the measuring equipment before measurement and the horizontal state display during measurement can be ensured.

[0033] (8) In the application, the control module is internally provided with a PLC or MCU, which can be used for collecting information of the synchronous lifting unit, the pressure sensor and the displacement sensor and the like, and sending corresponding control signals, so that closed-loop control of the measurement system can be realized. The control module displays the driving motor action information, the pressure information and the displacement information on the display module, and the tester can directly obtain the current measurement state and the final bearing axial clearance value through the display module.

[0034] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application, and are incorporated herein for purposes of explanation, and are not intended to limit the application. In the drawings:

[0036] Figure 1 is a schematic view of a bearing axial clearance measuring device in an embodiment of the present application;

[0037] Figure 2 is a schematic view of a bearing axial clearance measuring device in an embodiment of the present application;

[0038] Figure 3 is a schematic view of a bearing axial clearance measuring device in an embodiment of the present application;Figure 2 C-C cross-sectional view (no section line shown) in FIG. 1;

[0039] Figure 4 is a schematic diagram of the principle of a bearing axial clearance measurement method in the embodiment of the application;

[0040] Wherein, 1, outer ring support unit, 1.1, outer ring support table, 1.2, adjustment handle, 2, inner ring support unit, 2.1, inner ring support table, 3, synchronous lifting unit, 3.1, drive motor, 3.2, lifting mechanism, 4, sliding mechanism, 4.1, centering slide rail, 5, pressure sensor, 6, control module, 7, detection element, 7.1, displacement sensor, 7.2, level, 8, display module, 9, bearing, 9.1, outer ring, 9.2, inner ring. DETAILED DESCRIPTION

[0041] The embodiments of the application are described in detail below with reference to the accompanying drawings, but the application can be implemented in various different ways within the scope defined and covered by the claims.

[0042] Embodiment:

[0043] Referring to Figures 1 to 4 , a bearing axial clearance measurement device and method, the embodiment is applied to the axial clearance measurement of the main bearing of a heading machine.

[0044] A bearing axial clearance measurement device, comprising an outer ring support unit 1, an inner ring support unit 2, a synchronous lifting unit 3 and a sliding mechanism 4, as shown in Figure 1 ; the outer ring support unit 1 comprises a plurality of outer ring support tables 1.1 for supporting the outer ring 9.1 of the bearing 9, and the inner ring support unit 2 comprises a plurality of inner ring support tables 2.1 for supporting the inner ring 9.2 of the bearing 9, as shown in Figure 2 ; the synchronous lifting unit 3 is arranged on the inner ring support unit 2 and is used to realize the relative movement of the inner ring 9.2 and the outer ring 9.1 of the bearing 9 in the axial direction, so as to realize the measurement of the bearing axial clearance AB, as shown in Figure 3 ; a plurality of sliding mechanisms 4 are respectively connected with the outer ring support tables 1.1 and the inner ring support tables 2.1, and are used to realize the sliding of the outer ring support tables 1.1 and the inner ring support tables 2.1 along the radial direction of the bearing, so as to realize the adjustment of the distance between the outer ring support tables 1.1 and the inner ring support tables 2.1, thereby being applicable to the clearance measurement of main bearings of different diameter specifications. The bearing axial clearance measurement device in the application can be used for the axial clearance measurement of large-diameter heading machine main bearings with an outer diameter less than Φ10m.

[0045] The sliding mechanism 4 comprises a centering sliding rail 4.1, and the centering sliding rails 4.1 of a plurality of sliding mechanisms 4 are uniformly arranged in a diverging manner along the bearing circumference, and the outer ring support table 1.1 and the inner ring support table 2.1 are slidably arranged on each centering sliding rail 4.1, so as to uniformly support the bearing 9; in the embodiment, three sliding mechanisms 4 are arranged, and the three outer ring support tables 1.1 and the three inner ring support tables 2.1 are arranged in one-to-one correspondence on the three sliding mechanisms 4, so as to uniformly support the outer ring 9.1 and the inner ring 9.2 of the bearing 9; the length of the centering sliding rail 4.1 can be determined by the adjustment range required to be met, and in the embodiment, the length of the centering sliding rail 4.1 is 6 m. The manual adjustment device can be arranged on the inner ring support table 2.1 and the outer ring support table 1.1 to realize the movement of the inner ring support table 2.1 or the outer ring support table 1.1 on the centering sliding rail 4.1, as shown in Figure 1 The outer ring support table 1.1 is provided with an adjustment handle 1.2, and the movement of the outer ring support table 1.1 on the centering sliding rail 4.1 can be realized by rotating the adjustment handle 1.2.

[0046] The synchronous lifting unit 3 comprises a driving motor 3.1 and a plurality of lifting mechanisms 3.2, and the plurality of lifting mechanisms 3.2 are arranged in parallel at the input end and the output end of the driving motor 3.1, so as to facilitate the driving motor 3.1 to send a synchronous control signal to the plurality of lifting mechanisms 3.2, and realize the synchronous lifting of the plurality of lifting mechanisms 3.2 in the measurement process; in the embodiment, three lifting mechanisms 3.2 (i.e., a lifting mechanism one, a lifting mechanism two and a lifting mechanism three) are arranged, and the three lifting mechanisms 3.2 are arranged in parallel, as shown in Figure 4 .

[0047] The plurality of lifting mechanisms 3.2 are arranged in one-to-one correspondence on the plurality of inner ring support tables 2.1, and are used to realize the jacking action on the inner ring 9.2, so as to realize the movement of the inner ring 9.2 from one limit position to another limit position in the axial direction, and realize the measurement of the axial clearance. In the embodiment, the lifting mechanism 3.2 is embedded in the inner ring support table 2.1, which can reduce the space occupancy rate of the lifting mechanism 3.2 (especially in the vertical direction, which provides more jacking space for the lifting mechanism 3.2).

[0048] The bearing axial play measuring device further comprises a pressure sensor 5 and a control module 6; the lifting mechanism 3.2 is a self-locking hydraulic cylinder, and each lifting mechanism 3.2 is provided with a pressure sensor 5 at the top, which is used to detect the support force provided by the single lifting mechanism 3.2 to the inner ring 9.2, and the pressure sensor 5 and the driving motor 3.1 are connected with the control module 6; when the inner ring 9.2 is lifted to the limit position upward, the pressure sensor 5 will collect a sudden change in the pressure value due to the greater pressure applied to the lifting mechanism 3.2 by the connection with other parts, and the control module 6 will control the driving motor 3.1 to stop the lifting mechanism 3.2 from continuing to lift and realize self-locking, so as to realize intelligent measurement and avoid errors caused by observing whether the inner ring 9.2 has been lifted to the limit position by the human eye.

[0049] Each lifting mechanism 3.2 is provided with a hydraulic valve and a hydraulic oil pump corresponding to the lifting mechanism 3.2, and the hydraulic valve and the hydraulic oil pump are connected with the control module 6, so as to realize the on-off control of the hydraulic oil circuit of the lifting mechanism 3.2, thereby realizing the action control of the lifting mechanism 3.2.

[0050] The bearing axial play measuring device further comprises a detection element 7 connected with the control module 6, and the detection element 7 comprises a displacement sensor 7.1, which can be arranged on the outer ring 9.1, the inner ring 9.2 or the lifting mechanism 3.2, and is used to detect the bearing axial play; in the embodiment, the displacement sensor 7.1 is a slider displacement sensor, the main body of the sensor is arranged on the inner ring support table 2.1, and the slider of the sensor is arranged on the upper surface of the lifting mechanism 3.2, so as to realize high-precision measurement of the bearing axial play by measuring the displacement of the lifting mechanism 3.2 during the measurement process.

[0051] The detection element 7 further comprises a level 7.2, which can be used to measure the straightness and flatness of the outer ring support table 1.1, the inner ring support table 2.1 and the inner surface of the bearing 9, and is used for measuring the correctness of the installation position of the device and the smaller inclination. In the embodiment, the level is an optical combined level, which can ensure the horizontal position adjustment of the measuring device before measurement and the display of the horizontal state during the measurement process.

[0052] The bearing axial play measuring device further comprises a display module 8 connected with the control module 6, which is used to display the information in the measurement process. Referring to Figure 4The control module 6 can be internally provided with a PLC (programmable logic controller) to realize the collection and processing of the information of various sensors, or can be internally provided with an MCU (micro control unit) to realize the collection and processing of the information of various sensors. In the embodiment, three MCUs are internally provided in the control module 6, wherein the first MCU is a driving motor controller for collecting and sending the action signal of the synchronous lifting unit 3; the second MCU is a pressure signal controller for collecting and processing the pressure value signal of the pressure sensor 5; and the third MCU is a displacement signal controller for collecting the displacement information of the displacement sensor 7.1 and processing the same through the control module 6. The control module 6 displays the corresponding driving motor action information, pressure information and displacement information on the display module 8, so that the tester can directly obtain the current measurement state and the final bearing axial clearance value through the display module 8.

[0053] A bearing axial clearance measurement method using the bearing axial clearance measurement device described above, comprising the following steps:

[0054] Step A: Before placing the bearing 9, the positions of the outer ring support tables 1.1 and the inner ring support tables 2.1 on the sliding mechanism 4 are adjusted so that the outer ring support tables 1.1 and the inner ring support tables 2.1 are evenly arranged along the circumference of the bearing 9; whether the top surfaces of all the outer ring support tables 1.1 are on the same horizontal plane is detected by the level 7.2; whether the top surfaces of the lifting mechanisms 3.2 on all the inner ring support tables 2.1 are on the same horizontal plane is detected by the level 7.2.

[0055] Specifically, after all the outer ring support tables 1.1 are adjusted to the position, a flat steel plate detected by flatness is placed on the top of the outer ring support tables 1.1, the level 7.2 is placed on the steel plate, and whether the top surfaces of all the outer ring support tables 1.1 are on the same horizontal plane is confirmed. If not, shims are arranged on the outer ring support tables 1.1 until the top surfaces of all the outer ring support tables 1.1 are on the same horizontal plane. The adjustment method of the top surface of the lifting mechanism 3.2 is similar, which is not described herein again.

[0056] The outer ring 9.1 of the bearing 9 to be measured is horizontally placed on the outer ring support tables 1.1 of the outer ring support unit 1, so that the inner ring 9.2 of the bearing is suspended downward (i.e. the inner ring 9.2 is in the first axial limit position); after placing the bearing, the level 7.2 is placed on the upper surface of the outer ring 9.1 and the upper surface of the inner ring 9.2 respectively, and whether the outer ring 9.1 and the inner ring 9.2 of the bearing 9 are in a horizontal state is detected by the level 7.2.

[0057] Step B: adjust the initial position of the lifting mechanism 3.2 in the synchronous lifting unit 3, so that the top of the lifting mechanism 3.2 is in contact with the lower surface of the inner ring 9.2 of the bearing 9, when the value of the pressure sensor 5 at the top of the lifting mechanism 3.2 changes from zero, stop the action of the lifting mechanism 3.2 by controlling the driving motor 3.1 through the control module 6;

[0058] Step C: zero the pressure sensor 5 and the displacement sensor 7.1; turn on the synchronous lifting unit 3, and the lifting mechanism 3.2 uniformly lifts the inner ring 9.2 of the bearing 9, when the pressure value detected by the pressure sensor 5 is above the set threshold, the lifting mechanism 3.2 stops lifting, the axial clearance of the bearing is obtained by the displacement sensor 7.1, and is displayed on the display module 8.

[0059] The set threshold X is determined by expression 1):

[0060] X=M / n 1);

[0061] Wherein, M is the total mass of the bearing 9 (including the mass of the outer ring 9.1, the inner ring 9.2 and other parts of the bearing 9), and n is the total number of the lifting mechanism 3.2, in this embodiment, n=3.

[0062] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bearing axial play measuring apparatus, characterized by, The application relates to a bearing axial clearance testing device, which comprises an outer ring supporting unit (1), an inner ring supporting unit (2), a synchronous lifting unit (3) and a sliding mechanism (4); the outer ring supporting unit (1) comprises a plurality of outer ring supporting tables (1.1) for supporting bearing outer rings; the inner ring supporting unit (2) comprises a plurality of inner ring supporting tables (2.1) for supporting bearing inner rings; the synchronous lifting unit (3) is arranged on the inner ring supporting unit (2) and is used for realizing the relative movement of the inner ring and the outer ring of the bearing in the axial direction; a plurality of sliding mechanisms (4) are respectively connected with the outer ring supporting tables (1.1) and the inner ring supporting tables (2.1) and are used for realizing the sliding of the outer ring supporting tables (1.1) and the inner ring supporting tables (2.1) along the radial direction of the bearing. The synchronous lifting unit (3) comprises a driving motor (3.1) and a plurality of lifting mechanisms (3.2), and the plurality of lifting mechanisms (3.2) are arranged in parallel at the input end and the output end of the driving motor (3.1). The plurality of lifting mechanisms (3.2) are arranged one by one on the plurality of inner ring supporting tables (2.1). The application further comprises a detection element (7) connected with a control module (6), wherein the detection element (7) comprises a displacement sensor (7.1) used for detecting the axial clearance of the bearing. The detection element (7) further comprises a level (7.2).

2. A bearing axial play measuring apparatus according to claim 1, characterized in that The application further comprises a pressure sensor (5) and a control module (6); the lifting mechanism (3.2) is a self-locking hydraulic cylinder, each lifting mechanism (3.2) is provided with a pressure sensor (5) at the top, and the pressure sensor (5) and the driving motor (3.1) are connected with the control module (6).

3. A bearing axial play measuring apparatus according to claim 2, characterised in that, Each lifting mechanism (3.2) is correspondingly provided with a hydraulic valve and a hydraulic oil pump, and the hydraulic valve and the hydraulic oil pump are connected with the control module (6).

4. A bearing axial play measuring apparatus according to claim 3, characterised in that The application further comprises a display module (8) connected with the control module (6).

5. A bearing axial play measuring apparatus according to claim 4, characterised in that, The sliding mechanism (4) comprises a centering sliding rail (4.1), and the centering sliding rails (4.1) of the plurality of sliding mechanisms (4) are uniformly arranged in a diverging manner along the circumferential direction of the bearing; each centering sliding rail (4.1) is slidably provided with an outer ring supporting table (1.1) and an inner ring supporting table (2.1).

6. A method of measuring the axial play of a bearing, using a device for measuring the axial play of a bearing according to claim 4 or 5, characterized in that, The application comprises the following steps: Step A: adjusting the positions of the outer ring supporting tables (1.1) and the inner ring supporting tables (2.1) on the sliding mechanisms (4) so that the outer ring supporting tables (1.1) and the inner ring supporting tables (2.1) are uniformly arranged along the circumferential direction of the bearing; placing the outer ring of a bearing to be tested on the outer ring supporting tables (1.1) of the outer ring supporting unit (1) so that the inner ring of the bearing is hung downward; Step B: adjusting the initial positions of the lifting mechanisms (3.2) in the synchronous lifting unit (3) so that the top of the lifting mechanism (3.2) is in contact with the lower surface of the inner ring of the bearing; when the value of the pressure sensor (5) at the top of the lifting mechanism (3.2) is detected to change from zero, the action of the lifting mechanism (3.2) is stopped. Step C: zeroing operation for pressure sensor (5) and displacement sensor (7.1); starting the synchronous lifting unit (3), the lifting mechanism (3.2) jacks up the inner ring of the bearing, when the pressure value detected by the pressure sensor (5) is above the set threshold, the lifting mechanism (3.2) stops jacking up, and the axial clearance of the bearing measured by the displacement sensor (7.1) is obtained.

7. A method of measuring axial play of a bearing according to claim 6, characterized in that The step A further comprises: before placing the bearing, detecting whether the top surfaces of all outer ring support tables (1.1) are in the same horizontal plane by the level (7.2); detecting whether the top surfaces of the lifting mechanisms (3.2) on all inner ring support tables (2.1) are in the same horizontal plane by the level (7.2); After placing the bearing, detecting whether the outer ring and the inner ring of the bearing are in a horizontal state by the level (7.2).

8. A method of measuring axial play of a bearing according to claim 7, characterized in that In the step C, the inner ring of the bearing is pushed up at a constant speed by the lifting mechanism (3.2), and the threshold value X is determined by expression 1): X = M / n 1); Wherein, M is the total mass of the bearing, and n is the total number of the lifting mechanism (3.2).

Images