CN210774701U - Angular contact ball bearing pretension controlling means - Google Patents
Angular contact ball bearing pretension controlling means Download PDFInfo
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- CN210774701U CN210774701U CN201921797481.8U CN201921797481U CN210774701U CN 210774701 U CN210774701 U CN 210774701U CN 201921797481 U CN201921797481 U CN 201921797481U CN 210774701 U CN210774701 U CN 210774701U
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- sleeve
- ball bearing
- angular contact
- contact ball
- piezoelectric ceramic
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Abstract
The utility model belongs to the technical field of angular contact ball bearing pretightning force adjusting equipment. In order to solve the pretightning force that sets up when angular contact ball bearing installs, can't satisfy the problem of its operation in-process actual required pretightning force, the utility model discloses an angular contact ball bearing pretightning force controlling means. The device comprises an outer sleeve, an inner sleeve and a piezoelectric ceramic sleeve; the outer sleeve is attached to the tight sleeve and is arranged on the outer surface of the piezoelectric ceramic sleeve, the inner sleeve is attached to the inner surface of the piezoelectric ceramic sleeve in a penetrating mode, the end portion of the piezoelectric ceramic sleeve is in axial insulation contact with the outer ring of the angular contact ball bearing to be adjusted, and the outer sleeve and the inner sleeve are made of conductive materials and are respectively connected with the positive pole and the negative pole of the same power supply. Adopt the utility model discloses a device can change according to angular contact ball bearing's operating mode, carries out real-time initiative regulation and control to angular contact ball bearing's pretightning force, guarantees angular contact ball bearing and continuously operates at the optimum, improves its performance and life-span.
Description
Technical Field
The utility model belongs to the technical field of angular contact ball bearing pretightning force adjusting equipment, concretely relates to angular contact ball bearing pretightning force controlling means.
Background
Angular ball bearings are one of the most important support systems for high-speed rotary machines, and are widely used in the fields of high-speed machine tools, aircraft engines, motors, automobiles, high-speed centrifuges, and the like. The angular contact ball bearing generally needs to be pre-tightened during installation, and the proper pre-tightening force can eliminate bearing play and control the autorotation slip of the rolling body, so that the rigidity and the rotation precision of the main shaft are improved.
However, in the operation process of the angular contact ball bearing, along with the change of working conditions such as temperature and rotating speed, the pre-tightening force set during installation can not meet the change requirement of the real-time operation working condition of the bearing actually, so that the angular contact ball bearing is in a non-optimal pre-tightening state to operate, the temperature rise of the angular contact ball bearing is further aggravated, and the service life of the angular contact ball bearing is reduced. Therefore, in the running process of the angular contact ball bearing, the pre-tightening force is dynamically controlled according to the changes of working conditions such as bearing temperature rise, rotating speed and the like, and the method has important significance for improving the performance and prolonging the service life of the angular contact ball bearing.
SUMMERY OF THE UTILITY MODEL
In order to solve the pretightning force that sets up when angular contact ball bearing installs, can't satisfy the problem of the actual required pretightning force in its operation process, the utility model provides an angular contact ball bearing pretightning force controlling means can carry out the real-time adjustment of pretightning force to angular contact ball bearing in the operation to satisfy the requirement of angular contact ball bearing to the pretightning force in the different work condition. The device comprises an outer sleeve, an inner sleeve and a piezoelectric ceramic sleeve; the outer sleeve is tightly sleeved on the outer surface of the piezoelectric ceramic sleeve, the inner sleeve is tightly sleeved on the inner surface of the piezoelectric ceramic sleeve, the end part of the piezoelectric ceramic sleeve is in axial insulation contact with the outer ring of the angular contact ball bearing to be regulated, and the outer sleeve and the inner sleeve are made of conductive materials and are respectively connected with the positive electrode and the negative electrode of the same power supply.
Preferably, the outer sleeve and the piezoelectric ceramic sleeve are circumferentially positioned, and the piezoelectric ceramic sleeve and the inner sleeve are circumferentially positioned.
Further preferably, the inner surface of the outer sleeve is provided with first bosses distributed along the axial direction, and the outer surface of the piezoelectric ceramic sleeve is provided with first grooves matched with the first bosses in an inserted manner; the inner surface of the piezoelectric ceramic sleeve is provided with a second boss, and the outer surface of the inner sleeve is provided with a second groove which is matched with the second boss in an inserted mode.
Preferably, the device further comprises a gasket; the gasket is made of an insulating material, is positioned at the end part of the piezoelectric ceramic sleeve and is in direct contact with an outer ring of the angular contact ball bearing to be adjusted.
Further preferably, the axial dimension of the piezoceramic sleeve is smaller than the axial dimensions of the outer sleeve and the inner sleeve, the cross section of the gasket is of a convex structure, and a protruding part extends to a position between the outer sleeve and the inner sleeve and is in contact with the axial end face of the piezoceramic sleeve.
Further preferably, the gasket is provided with a line hole; the wire hole penetrates through the inner surface and the outer surface of the gasket and is used for penetrating a wire connected with the inner sleeve.
Preferably, the gasket is made of hard ceramic material.
Preferably, the outer surface of the outer sleeve and the inner surface of the inner sleeve are both provided with an insulating coating.
Preferably, the outer sleeve and the inner sleeve are made of hard conductive materials.
Further preferably, the outer sleeve and the inner sleeve are made of stainless steel.
Adopt the utility model discloses an angular contact ball bearing pretightning force controlling means is used for angular contact ball bearing's pretightning force to set up, has following beneficial technological effect:
the utility model discloses in, based on piezoceramics's inverse piezoelectric effect, through set up a piezoceramics sleeve between outer sleeve and the inner skleeve of being connected with same positive negative pole respectively, utilize the electric field intensity change that forms between control outer sleeve and the inner skleeve, produce along axial controllable meeting an emergency to piezoceramics sleeve. Therefore, the device can be used for adjusting the pretightening force of the angular contact ball bearing in the operation process, namely the electric field intensity between the outer sleeve and the inner sleeve is adjusted in real time according to the temperature change and the rotating speed change of the angular contact ball bearing in the operation process, so that the piezoelectric ceramic sleeve is adjusted along the axial strain, the pretightening force of the angular contact ball bearing is actively adjusted and controlled, the real-time adjustment of the pretightening force of the angular contact ball bearing according to the working condition change is met, the continuous operation of the angular contact ball bearing in the optimal state is ensured, and the service performance.
Drawings
FIG. 1 is a schematic structural diagram of a preload control device for an angular contact ball bearing according to the present embodiment;
fig. 2 is a schematic structural diagram illustrating the pre-tightening force control device of the angular contact ball bearing of the present embodiment installed between two angular contact ball bearings arranged in a back-to-back manner;
fig. 3 is a schematic structural diagram illustrating the angular contact ball bearing pretightening force control device of the present embodiment installed between the angular contact ball bearings arranged in a face-to-face manner and the positioning structure;
fig. 4 is a schematic cross-sectional view at a-a in fig. 1.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, the angular ball bearing preload control apparatus 1 of the present embodiment includes an outer sleeve 11, an inner sleeve 12, and a piezoelectric ceramic sleeve 13. The outer sleeve 11 is closely sleeved on the outer surface of the piezoelectric ceramic sleeve 13, the inner sleeve 12 is closely arranged on the inner surface of the piezoelectric ceramic sleeve 13, and a structural form that the outer sleeve 11 and the inner sleeve 12 clamp the piezoelectric ceramic sleeve 13 in the middle is formed. Meanwhile, the outer sleeve and the inner sleeve are made of conductive materials and are respectively connected with the positive electrode and the negative electrode of the same power supply, and the end part of the piezoelectric ceramic sleeve is in insulated contact with the outer ring of the angular contact ball bearing to be adjusted.
At the moment, based on the inverse piezoelectric effect of the piezoelectric ceramic, the outer sleeve and the inner sleeve are respectively connected with the positive electrode and the negative electrode of the same power supply, and an electric field is generated and applied to the piezoelectric ceramic sleeve, so that the piezoelectric ceramic sleeve generates controllable strain. Wherein the strain follows the basic inverse piezoelectric equation:
ΔLj＝dijEi
Δ L is strain, d is a voltage constant, E is the electric field strength, and i and j are the electric field and strain directions, respectively.
Therefore, in the running process of the angular contact ball bearing, according to the real-time change of the temperature and the rotating speed of the bearing, the intensity change of an electric field formed between the outer sleeve and the inner sleeve is controlled, so that the piezoelectric ceramic sleeve can generate corresponding controllable strain, the active adjustment and control of the pre-tightening force of the angular contact ball bearing are realized, the real-time adjustment of the pre-tightening force of the angular contact ball bearing according to the change of working conditions is met, the continuous running of the angular contact ball bearing in the optimal state is ensured, and the service performance and the service.
With reference to fig. 2 and 3, the angular ball bearing preload control device 1 of the present embodiment may be installed between two angular ball bearings 2 arranged in a back-to-back manner, or may be installed between two angular ball bearings 2 arranged in a face-to-face manner and a positioning structure 3.
Preferably, as shown in fig. 4, the inner surface of the outer sleeve 11 is provided with first bosses 111 distributed along the axial direction, the outer surface of the piezoelectric ceramic sleeve 13 is provided with first grooves 131 inserted and matched with the first bosses 111, the inner surface of the piezoelectric ceramic sleeve 13 is provided with second bosses 132, and the outer surface of the inner sleeve 12 is provided with second grooves 121 inserted and matched with the second bosses 132.
At the moment, by means of the axial insertion fit between the first boss and the first groove and the axial insertion fit between the second boss and the second groove, the positioning along the circumferential direction among the outer sleeve, the inner sleeve and the piezoelectric ceramic sleeve can be realized, the piezoelectric ceramic sleeve is prevented from generating offset at the radial position due to the torque, the controllability of strain generated by the piezoelectric ceramic sleeve under an electric field is ensured, and the accurate adjustment of the pretightening force of the angular contact ball bearing is improved.
Further, the bosses and the grooves are designed to be of a completely penetrating structure, namely the first bosses are distributed on the whole axial dimension of the outer sleeve, the first grooves and the second bosses are distributed on the whole axial dimension of the piezoelectric ceramic sleeve, and the second grooves are distributed on the whole axial dimension of the inner sleeve. Therefore, the outer sleeve, the inner sleeve and the piezoelectric ceramic sleeve are conveniently connected in a plug-in mounting mode, the piezoelectric ceramic sleeve can simultaneously strain along two axial directions, the stability and the accuracy of pretightening force adjustment of the angular contact ball bearing are improved, especially when the pretightening force adjustment device is used for arranging the angular contact ball bearing in a back-to-back mode, the pretightening force of the two angular contact ball bearings can be synchronously adjusted, and synchronous operation of the two angular contact ball bearings is guaranteed.
Similarly, in other embodiments, the outer sleeve, the inner sleeve and the piezoceramic sleeve may be circumferentially positioned in other manners, such as by providing a positioning pin in the diameter direction.
As shown in fig. 1, in the angular ball bearing preload control apparatus 1 of the present embodiment, two washers 14 are further provided. The gaskets 14 are made of insulating materials and are respectively located at two ends of the piezoelectric ceramic sleeve 13 and used for being in direct contact with an outer ring of the angular contact ball bearing to be adjusted, so that the problem of electric conduction which may occur when the piezoelectric ceramic sleeve is in direct contact with the angular contact ball bearing to be adjusted is avoided.
In this embodiment, the gasket is made of hard ceramic. Therefore, the insulation effect between the angular contact ball bearing and the piezoelectric ceramic sleeve can be realized, and meanwhile, the accuracy of acting force applied to the angular contact ball bearing by the piezoelectric ceramic sleeve in transmission is ensured by utilizing the enough hardness of the piezoelectric ceramic sleeve, so that the accuracy of adjusting the pretightening force of the angular contact ball bearing is further ensured. Similarly, in other embodiments, two ends of the piezoelectric ceramic sleeve can also be directly extended out of the outer sleeve and the inner sleeve, and an insulating effect is achieved by coating an insulating layer, so that the piezoelectric ceramic sleeve is directly contacted with the outer ring of the angular contact ball bearing.
As shown in fig. 1, in the present embodiment, the axial dimension of the piezoelectric ceramic sleeve 13 is smaller than the axial dimension of the outer sleeve 11 and the axial dimension of the inner sleeve 12, while the cross section of the washer 14 has a convex structure, and the protruding portion extends to contact with the axial end face of the piezoelectric ceramic sleeve 13 between the outer sleeve 11 and the inner sleeve 12. At the moment, the whole piezoelectric ceramic sleeve can be positioned in the gap between the outer sleeve and the inner sleeve, so that the protection of the piezoelectric ceramic sleeve is improved, and the piezoelectric ceramic sleeve can be always positioned in an electric field between the outer sleeve and the inner sleeve in the whole strain process, so that the control precision of strain generated on the piezoelectric ceramic sleeve is ensured.
Further, as shown in connection with fig. 1, a wire hole 141 is provided at the washer 14, and the wire hole 141 penetrates the inner and outer surfaces of the washer 14 for passing the wire 15 connected to the inner sleeve 12.
In this embodiment, the outer sleeve and the inner sleeve are both made of stainless steel, and an insulating layer is provided on the outer surface of the outer sleeve and the inner surface of the inner sleeve. Therefore, under the condition that the outer sleeve and the inner sleeve have certain structural strength and electric conductivity, the external insulation is realized, and the safety and reliability of the device in the using process are ensured. Similarly, in other embodiments, the outer sleeve and the inner sleeve may be made of other hard conductive materials to meet the requirements of conductivity and hardness.
Claims (10)
1. The pre-tightening force control device of the angular contact ball bearing is characterized by comprising an outer sleeve, an inner sleeve and a piezoelectric ceramic sleeve; the outer sleeve is tightly sleeved on the outer surface of the piezoelectric ceramic sleeve, the inner sleeve is tightly sleeved on the inner surface of the piezoelectric ceramic sleeve, the end part of the piezoelectric ceramic sleeve is in axial insulation contact with the outer ring of the angular contact ball bearing to be regulated, and the outer sleeve and the inner sleeve are made of conductive materials and are respectively connected with the positive electrode and the negative electrode of the same power supply.
2. The device of claim 1, wherein circumferential positioning is provided between the outer sleeve and the piezo ceramic sleeve, and circumferential positioning is provided between the piezo ceramic sleeve and the inner sleeve.
3. The device as claimed in claim 2, wherein the inner surface of the outer sleeve is provided with first bosses distributed along the axial direction, and the outer surface of the piezoceramic sleeve is provided with first grooves which are inserted and matched with the first bosses; the inner surface of the piezoelectric ceramic sleeve is provided with a second boss, and the outer surface of the inner sleeve is provided with a second groove which is matched with the second boss in an inserted mode.
4. The device of claim 1, further comprising a gasket; the gasket is made of an insulating material, is positioned at the end part of the piezoelectric ceramic sleeve and is in direct contact with an outer ring of the angular contact ball bearing to be adjusted.
5. The apparatus of claim 4, wherein the piezoceramic sleeve has an axial dimension that is less than an axial dimension of the outer sleeve and an axial dimension of the inner sleeve, the washer having a convex configuration in cross-section and a protrusion extending between the outer sleeve and the inner sleeve in contact with an axial end face of the piezoceramic sleeve.
6. The device of claim 4, wherein the washer is provided with a wire hole; the wire hole penetrates through the inner surface and the outer surface of the gasket and is used for penetrating a wire connected with the inner sleeve.
7. The apparatus of claim 4, wherein the gasket is made of a hard ceramic material.
8. The device of any one of claims 1-7, wherein both the outer surface of the outer sleeve and the inner surface of the inner sleeve are provided with an insulating coating.
9. The device of any one of claims 1-7, wherein the outer sleeve and the inner sleeve are made of a hard, electrically conductive material.
10. The device of claim 9, wherein the outer sleeve and the inner sleeve are stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921797481.8U CN210774701U (en) | 2019-10-24 | 2019-10-24 | Angular contact ball bearing pretension controlling means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921797481.8U CN210774701U (en) | 2019-10-24 | 2019-10-24 | Angular contact ball bearing pretension controlling means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210774701U true CN210774701U (en) | 2020-06-16 |
Family
ID=71040014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921797481.8U Expired - Fee Related CN210774701U (en) | 2019-10-24 | 2019-10-24 | Angular contact ball bearing pretension controlling means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210774701U (en) |
-
2019
- 2019-10-24 CN CN201921797481.8U patent/CN210774701U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 Termination date: 20211024 |