CN209247353U - Angular stiffness measurement test bench for angular contact ball bearings - Google Patents

Abstract

The utility model relates to an angular stiffness measurement test bench for angular contact ball bearings, which comprises a frame, on which a main shaft is horizontally erected, and one end sleeve of the main shaft is provided with a supporting angular contact ball bearing, and the supporting The angular contact ball bearing is arranged on the first bearing seat, and the other end sleeve of the main shaft is provided with the angular contact ball bearing to be measured, and the angular contact ball bearing to be measured is arranged on the second bearing seat, and the A loading assembly is arranged above the middle part, a first eddy current displacement sensor is arranged on one side of the angular contact ball bearing to be tested, and a second eddy current displacement sensor is arranged on the other side of the angular contact ball bearing to be tested. The utility model not only has a simple and reasonable structural design, but also can measure the angular stiffness, and is easy to operate, convenient and fast.

Description

Angular stiffness measurement test bench for angular contact ball bearings

technical field

The utility model relates to an experimental platform for measuring angular stiffness of angular contact ball bearings.

Background technique

Stiffness is one of the important indicators to measure the dynamic characteristics of bearings. Bearing stiffness generally includes axial stiffness, radial stiffness and angular stiffness. At present, most of the bearing test benches widely used are aimed at axial and radial stiffness, and lack the measurement of diagonal stiffness. If the bearing is subjected to a moment perpendicular to the axis, the inner and outer rings of the bearing will have a relative inclination angle, and the angular stiffness value can truly reflect the ability of the bearing to resist inclination deformation.

Utility model content

In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a test bench for measuring the angular stiffness of angular contact ball bearings, which not only has a reasonable structural design, but also can measure the angular stiffness.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: an angular stiffness measurement test bench for angular contact ball bearings, including a frame, on which a main shaft is horizontally erected, and one end of the main shaft is sleeved There is a supporting angular contact ball bearing, the supporting angular contact ball bearing is arranged on the first bearing seat, and the other end sleeve of the main shaft is provided with an angular contact ball bearing to be measured, and the angular contact ball bearing to be measured is arranged on On the second bearing seat, a loading assembly is arranged above the middle part of the main shaft, a first eddy current displacement sensor is arranged on one side of the angular contact ball bearing to be measured, and a first eddy current displacement sensor is arranged on the other side of the angular contact ball bearing to be measured. There is a second eddy current displacement sensor.

Further, the installation direction of the probe of the first eddy current displacement sensor and the installation direction of the probe of the second eddy current displacement sensor are both parallel to the radial direction of the main shaft.

Further, the loading assembly includes a mounting plate, a loading screw, a guide plate, a connecting plate, a force sensor, and a loading head arranged sequentially from top to bottom, and the mounting plate is provided with a threaded hole for the loading screw to pass through, so The upper part of the loading screw is screwed together with the mounting plate through the threaded hole.

Further, the lower end of the loading screw and the guide plate are locked together with a nut, the guide plate and the connecting plate are locked together with a screw, and the connecting plate, force sensor and loading head are locked together with a screw.

Further, the installation direction of the loading assembly is parallel to the radial direction of the main shaft.

Further, the first eddy current displacement sensor is arranged on the first bracket, and the second eddy current displacement sensor is arranged on the second bracket.

Further, the supporting angular contact ball bearing includes a first inner ring and a first outer ring, the first inner ring is sleeved on the main shaft, and the main shaft is provided with a first shoulder for positioning the first inner ring, The first outer ring is installed in the first bearing hole of the first bearing seat, and the first bearing seat is connected with the first bearing end cover through screws.

Further, the angular contact ball bearing to be tested includes a second inner ring and a second outer ring, the second inner ring is sleeved on the main shaft, and the main shaft is provided with a second shoulder for positioning the second inner ring , the second outer ring is installed in the second bearing hole of the second bearing seat, and the second bearing seat is connected with the second bearing end cover through screws.

Compared with the prior art, the utility model has the following beneficial effects: the utility model not only has a simple and reasonable structural design, but also can measure the angular stiffness, and is easy to operate, convenient and quick.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of an embodiment of the utility model.

Fig. 2 is a partial structural schematic diagram of an embodiment of the utility model.

Fig. 3 is a schematic diagram of a method for measuring angular stiffness in an embodiment of the present invention.

In the figure: 1-frame, 2-spindle, 3-support angular contact ball bearing, 301-first inner ring, 302-first outer ring, 4-first bearing seat, 5-angular contact ball bearing to be tested, 501-Second inner ring, 502-Second outer ring, 6-Second bearing seat, 7-Loading assembly, 701-Installation plate, 702-Loading screw, 703-Guide plate, 704-Connection plate, 705-Force sensor , 706-loading head, 8-first eddy current displacement sensor, 9-second eddy current displacement sensor, 10-data acquisition instrument, 11-computer, 12-nut, 13-screw, 14-first bracket, 15- The second bracket, 16-the first shaft shoulder, 17-the first bearing end cover, 18-the second shaft shoulder, 19-the second bearing end cover.

Detailed ways

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific examples are given together with the accompanying drawings and described in detail as follows.

As shown in Figures 1 to 3, an angular stiffness measurement test bench for angular contact ball bearings includes a frame 1 on which a main shaft 2 is horizontally erected, and one end of the main shaft 2 is provided with a support Angular contact ball bearing 3, the supporting angular contact ball bearing 3 is arranged on the first bearing seat 4, the other side of the main shaft 2 is provided with an angular contact ball bearing 5 to be measured, the angular contact ball to be measured The bearing 5 is arranged on the second bearing housing 6, a loading assembly 7 is arranged above the middle part of the main shaft 2, and a first eddy current displacement sensor 8 is arranged on one side of the angular contact ball bearing 5 to be tested. The other side of the angular contact ball bearing 5 is provided with a second eddy current displacement sensor 9 .

In this utility model embodiment, the probe setting direction of the first eddy current displacement sensor 8 and the probe setting direction of the second eddy current displacement sensor 9 are all parallel to the radial direction of the main shaft 2; the first eddy current displacement sensor Sensor 8 and the second eddy current displacement sensor 9 all adopt existing eddy current displacement sensor, and described first eddy current displacement sensor 8 and the second eddy current displacement sensor 9 are connected with computer 11 by data acquisition instrument 10, detect all Describe the change of the radial displacement of the main shaft 2.

In the embodiment of the present utility model, the loading assembly 7 includes a mounting plate 701, a loading screw 702, a guide plate 703, a connecting plate 704, a force sensor 705 and a loading head 706 arranged sequentially from top to bottom. The mounting plate 701 There is a threaded hole for the loading screw 702 to pass through, and the upper part of the loading screw 702 is threadedly connected with the mounting plate 701 through the threaded hole; the forward rotation of the loading screw 702, the screw is connected with the guide plate 703, The plate 704, the force sensor 705 and the loading head 706 move downward, so as to radially load the main shaft 2, reversely rotate the loading screw 702, and the screw together with the guide plate 703, the connecting plate 704, the force sensor 705 and The loading head 706 moves upwards to reduce the load applied on the main shaft 2 until the loading head 706 is away from the main shaft 2; the force sensor 705 adopts the existing force sensor 705, and the force sensor 705 detects the magnitude of the loading force .

In the embodiment of the present utility model, the lower end of the loading screw 702 and the guide plate 703 are locked together by the nut 12, the guide plate 703 and the connecting plate 704 are locked together by the screw 13, the connecting plate 704, The force sensor 705 and the loading head 706 are locked together via the screw 13 .

In the embodiment of the present utility model, the installation direction of the loading assembly 7 is parallel to the radial direction of the main shaft 2 .

In the embodiment of the present utility model, the first eddy current displacement sensor 8 is arranged on the first bracket 14 , and the second eddy current displacement sensor 9 is arranged on the second bracket 15 .

In the embodiment of the utility model, the supporting angular contact ball bearing 3 includes a first inner ring 301 and a first outer ring 302, and the first inner ring 301 is sleeved on the main shaft 2, and the main shaft 2 is provided with a useful To locate the first shoulder 16 of the first inner ring 301, the first outer ring 302 is installed in the first bearing hole of the first bearing seat 4, and the first bearing seat 4 is connected with the first bearing via the screw 13 The end cover 17 is connected; preferably, the first inner ring 301 is an interference fit with the main shaft 2, and the first outer ring 302 is an interference fit with the first bearing hole.

In the embodiment of the utility model, the angular contact ball bearing 5 to be tested includes a second inner ring 501 and a second outer ring 502, the second inner ring 501 is sleeved on the main shaft 2, and the main shaft 2 is set There is a second shoulder 18 for positioning the second inner ring 501, the second outer ring 502 is installed in the second bearing hole of the second bearing seat 6, and the second bearing seat 6 is connected with the second The bearing end cover 19 is connected; preferably, the second inner ring 501 is an interference fit with the main shaft 2, and the second outer ring 502 is an interference fit with the second bearing hole.

The specific working process of the utility model is as follows: rotate the loading screw 702 to move downward, apply a radial load F to the main shaft 2 through the loading head 706, and monitor the readings of the force sensor 705; after applying the radial load, it will A torque is generated at the angular contact ball bearing 5 to be measured, so that the main shaft 2 rotates with the second inner ring 501 at a certain angle to generate a relative inclination angle θ. At this time, the first eddy current displacement sensor 8 and the second The readings of the two eddy current displacement sensors 9 will change; the readings of the force sensor 705, the first eddy current displacement sensor 8 and the second eddy current displacement sensor 9 are read into the computer 11 by the data acquisition instrument 10, and used as bearings Calculation of angular stiffness.

The calculation method is as follows, assuming that the load measured by the force sensor 705 is F, the distance between the point of action and the angular contact ball bearing 5 to be measured is L, the readings of the first eddy current displacement sensor 8 and the second eddy current displacement sensor 9 are δ1 and δ2 respectively, and the distances from the bearing to be tested are L1 and L2 respectively.

According to the moment M calculation formula: M=FgL, obtain the moment M at the angular contact ball bearing 5 to be measured, where θ is the relative inclination, and K is the angular stiffness;

The relative inclination angle θ can be calculated according to formula 1, and then M and θ can be brought into formula 2 to obtain the angular stiffness K of the angular contact ball bearing.

Unless otherwise stated, the terms used in any of the technical solutions disclosed in the present utility model to indicate positional relationship or shape include states or shapes that are similar, similar or close to them.

Any component provided by the utility model can be assembled from a plurality of individual components, and can also be a single component manufactured by an integral forming process.

The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still can be specific to the utility model Modification of the implementation mode or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the utility model, all of them shall be included in the scope of the technical solution claimed by the utility model.

Claims (8)

1. a kind of angular rigidity measurement experiment platform of angular contact ball bearing, it is characterised in that: including rack, transverse strands in the rack Equipped with main shaft, the side end cap of the main shaft is equipped with support angular contact ball bearing, and the support angular contact ball bearing is arranged the On one bearing block, the other side end cap of the main shaft is equipped with angular contact ball bearing to be measured, the angular contact ball bearing setting to be measured In second bearing seat, it is provided with charging assembly above the middle part of the main shaft, the side of the angular contact ball bearing to be measured is set It is equipped with the first eddy current displacement sensor, the other side of the angular contact ball bearing to be measured is provided with the second current vortex displacement sensing Device.

2. the angular rigidity measurement experiment platform of angular contact ball bearing according to claim 1, it is characterised in that: first electricity The probe setting direction of eddy displacement sensor and the probe setting direction of the second eddy current displacement sensor with the diameter of main shaft To parallel.

3. the angular rigidity measurement experiment platform of angular contact ball bearing according to claim 1, it is characterised in that: the load group Part includes to be sequentially set with mounting plate, load screw rod, guide plate, connecting plate, force snesor and loading head from top to bottom, described The threaded hole passed through to load screw rod is offered on mounting plate, the top of the load screw rod is through threaded hole and mounting plate screw thread It links together.

4. the angular rigidity measurement experiment platform of angular contact ball bearing according to claim 3, it is characterised in that: the load spiral shell The lower end of bar and guide plate through nut check together with, the guide plate and connecting plate through screw locking together with, the connection Plate, force snesor and loading head through screw locking together.

5. the angular rigidity measurement experiment platform of angular contact ball bearing according to claim 1, it is characterised in that: the load group The setting direction of part and the radial direction of main shaft are parallel.

6. the angular rigidity measurement experiment platform of angular contact ball bearing according to claim 1, it is characterised in that: first electricity Eddy displacement sensor is arranged in first support, and the second eddy current displacement sensor setting is on the secondary support bracket.

7. the angular rigidity measurement experiment platform of angular contact ball bearing according to claim 1, it is characterised in that: the strut angle Contact ball bearing includes the first inner ring and the first outer ring, and first inner ring is set on main shaft, is arranged on the main shaft useful To position first shaft shoulder of the first inner ring, first outer ring is mounted in the first axle bearing bore of first bearing seat, and described first It is connected through screw with first bearing end cap on bearing block.

8. the angular rigidity measurement experiment platform of angular contact ball bearing according to claim 1, it is characterised in that: the angle measurement Contact ball bearing includes the second inner ring and the second outer ring, and second inner ring is set on main shaft, is arranged on the main shaft useful To position second shaft shoulder of the second inner ring, second outer ring is mounted in the second bearing hole of second bearing seat, and described second It is connected through screw with second bearing end cap on bearing block.