CN117526647A

CN117526647A - Static electricity leading-out mechanism for bearing rotor system

Info

Publication number: CN117526647A
Application number: CN202311472801.3A
Authority: CN
Inventors: 张全生; 田福真
Original assignee: Beijing Zhongchuang Zhiyuan Technology Co ltd
Current assignee: Beijing Zhongchuang Zhiyuan Technology Co ltd
Priority date: 2023-11-07
Filing date: 2023-11-07
Publication date: 2024-02-06

Abstract

The invention provides an electrostatic guiding mechanism for a bearing rotor system, relates to the technical field of bearing rotor systems, and aims to solve the problem of bearing electric erosion in the related art. The bearing rotor system comprises a shell, a rotor and a bearing, wherein the rotor is fixed on the shell through the bearing; the rotor has a first end and a second end, the first end is configured to be connected with a driving device and rotate around a rotating shaft of the rotor under the driving of the driving device, and the second end is provided with an accommodating groove; the static electricity leading-out mechanism comprises a conductive transition piece and a conductive contact piece: the conductive transition piece comprises a first transition portion and a second transition portion which are connected with each other, the first transition portion is located in the accommodating groove and is in contact with the inner wall of the accommodating groove, the second transition portion is in contact with the conductive contact piece, and the conductive contact piece is fixed on the shell.

Description

Static electricity leading-out mechanism for bearing rotor system

Technical Field

The invention relates to the technical field of bearing rotor systems, in particular to an electrostatic guiding mechanism for a bearing rotor system.

Background

Bearing galvanic corrosion is a common phenomenon occurring in various bearing rotor systems and has a certain degree of harm to various rotary mechanical equipment.

The mechanism of bearing electric corrosion is explained as follows: when the rotors of various rotary machines run, the rotors are charged with working media in a friction mode or a cutting magnetic field in a charging mode, charges are accumulated in long-term running, and voltage is generated. When the rotor adopts a ceramic bearing, a layer of metal film can be generated on the surface of the bearing ball in long-term friction operation. When the bearing runs, the inner ring and the outer ring are in poor contact, and the resistance is high; when the bearing is static, the inner ring and the outer ring are in good contact, and the resistance is small. For other bearings such as air bearing and oil film sliding bearing, the mechanism is different, but the resistance change characteristics are similar.

In the case of a rotating machine, when the machine is stopped, the charge of the rotor is released instantaneously at a part of the bearing, and hot melt ablation is generated on the surface of the bearing, so that the surface of the bearing becomes uneven. In addition, when the rotary mechanical equipment runs for a long time, the surfaces of the bearing balls and the inner ring and the outer ring are seriously damaged, and the center of the bearing is deviated, so that the stable running of the whole mechanical equipment is affected.

Disclosure of Invention

The invention aims to provide an electrostatic discharge mechanism for a bearing rotor system, which is used for improving the problem of bearing electric erosion in the related art.

In order to achieve the above object, the present invention provides the following technical solutions:

providing an electrostatic derivation mechanism for a bearing rotor system, the bearing rotor system comprising a housing, a rotor and a bearing, the rotor being secured to the housing by the bearing; the rotor has a first end and a second end, the first end is configured to be connected with a driving device and rotate around a rotating shaft of the rotor under the driving of the driving device, and the second end is provided with an accommodating groove; the static electricity leading-out mechanism comprises a conductive transition piece and a conductive contact piece: the conductive transition piece comprises a first transition portion and a second transition portion which are connected with each other, the first transition portion is located in the accommodating groove and is in contact with the inner wall of the accommodating groove, the second transition portion is in contact with the conductive contact piece, and the conductive contact piece is fixed on the shell.

In some embodiments, the first transition is a hemisphere.

In some embodiments, the second transition is hemispherical.

In some embodiments, the first transition and the second transition are connected to form a sphere.

In some embodiments, the sphere center of the sphere is located on the axis of rotation of the rotor.

In some embodiments, the first transition portion and the second transition portion are integrally formed.

In some embodiments, the conductive transition piece further comprises a connecting portion connected between the first transition portion and the second transition portion, the connecting portion is arranged in a column shape, the conductive transition piece is symmetrically arranged about a first plane, and an axis of the connecting portion is located on the first plane.

In some embodiments, the contact end of the second transition portion with the conductive contact is located outside the receiving recess.

In some embodiments, the conductive transition piece is a magnetic conductive transition piece.

In some embodiments, the conductive contact is a metal spring foil.

In some embodiments, the receiving groove is any one of the following three: conical grooves, hemispherical grooves, and columnar grooves.

The beneficial effects are that:

with the static electricity leading-out mechanism provided by the disclosure, as the conductive transition piece is respectively contacted with the rotor and the conductive contact piece, the charges in the rotor can be led out through the conductive transition piece and the conductive contact piece in sequence, so that negative influence of accumulation of the charges in the rotor or the bearing on the running stability of the rotor system of the bearing is avoided. In addition, when the conductive transition piece is driven by the rotor to rotate, the conductive transition piece is always in point contact or linear contact with the rotor, so that friction generated between the conductive transition piece and the rotor can be effectively reduced, and abrasion between the rotor and the conductive transition piece is avoided. Meanwhile, point contact or linear contact is always generated between the conductive transition piece and the conductive contact piece, so that abrasion between the conductive transition piece and the conductive contact piece can be effectively avoided. The electrostatic guiding mechanism is simple in overall arrangement, and can be installed only by arranging corresponding accommodating grooves on the rotor, so that the electrostatic guiding mechanism is very convenient to use; the use cost is low, and the operation is very reliable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the disclosure and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

FIG. 1 is a schematic diagram of a mounting structure for a bearing rotor system and an electrostatic derivation mechanism provided by some embodiments of the present disclosure;

FIG. 2 is an enlarged schematic view of the structure at position A in FIG. 1;

FIG. 3 is a schematic structural view of a conductive transition piece provided by some embodiments of the present disclosure;

reference numerals:

11-housing, 12-rotor, 13-bearing, 21-conductive transition piece, 22-conductive contact piece, 120-receiving recess, 121-first end, 122-second end, 211-first transition, 212-second transition, 213-connection.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. The components of the embodiments of the present disclosure, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the disclosure, as claimed, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Throughout the specification and claims, the term "comprising" is to be interpreted as an open, inclusive meaning, i.e. "comprising, but not limited to, unless the context requires otherwise. In the description of the present specification, the terms "some embodiments," "some examples," or "exemplary" and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the invention. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present disclosure, it should be understood that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc., are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship conventionally put in use of the application product, or the azimuth or positional relationship conventionally understood by those skilled in the art, are merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present disclosure.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. The term "a and/or B" includes the following combinations: only a, only B, or a and B. In the description of this disclosure, relative rotation of C and D may refer to C being stationary and D being rotating, or C being rotating and D being stationary.

In the description of the present disclosure, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly and, for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. In addition, "fixed" may be directly connected or indirectly fixed through an intermediate medium. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

In the related art, for a rotary machine, when the rotary machine stops running, charges of a rotor are released at a local part of a bearing instantaneously, and hot melting ablation is generated on the surface of the bearing, so that the surface of the rotary machine becomes uneven. In addition, when the rotary mechanical equipment runs for a long time, the surfaces of the bearing balls and the inner ring and the outer ring are seriously damaged, and the center of the bearing is deviated, so that the stable running of the whole mechanical equipment is affected. Therefore, it is necessary for the rotary machine to conduct out and release the electric charge in the rotor.

Based on this, some embodiments of the present disclosure provide an electrostatic discharge guiding mechanism for a bearing rotor system, as shown in fig. 1, which includes a housing 11, a rotor 12, and a bearing 13, the rotor 12 being fixed to the housing 11 by the bearing 13.

The rotor 12 has oppositely disposed first and second ends 121, 122. Illustratively, the rotor 12 is disposed linearly, and the two ends of the rotor 12 along its length are a first end 121 and a second end 122.

Wherein the first end 121 is configured to be coupled to and rotated by a drive device. Thus, the drive means may drive the rotor 12 about its axis of rotation.

As shown in fig. 1-2, the second end 122 has a receiving recess 120. The accommodating groove 120 is formed on the surface of the second end 122 and is recessed along the direction of the second end 122 toward the first end 121, thereby forming a recessed groove body.

As shown in fig. 2-3, the static electricity lead-out mechanism includes a conductive transition piece 21 and a conductive contact piece 22, the conductive transition piece 21 including a first transition portion 211 and a second transition portion 212 connected to each other.

The first transition portion 211 is located in the accommodating recess 120 and contacts the inner wall of the accommodating recess 120, so that the first transition portion 211 can introduce charges on the rotor 12 to itself and then transition to the second transition portion 212.

The second transition 212 is disposed in contact with the conductive contact 22, and the conductive contact 22 is fixed to the housing 11 such that an electrical charge on the second transition 212 can be introduced into the housing 11 through the conductive contact 22.

With the static electricity leading-out mechanism, since the conductive transition piece 21 is respectively contacted with the rotor 12 and the conductive contact piece 22, and the conductive contact piece 22 is fixed on the shell 11, the charges in the rotor 12 can be led out to the shell 11 through the conductive transition piece 21 and the conductive contact piece 22 in sequence, thereby avoiding negative influence on the operation stability of the bearing rotor system caused by the accumulation of the charges in the rotor 12 or the bearing 13.

In some embodiments, as shown in fig. 2-3, the first transition portion 211 is a hemisphere, so that when the conductive transition piece 21 is driven to rotate by the rotor 12, the conductive transition piece 21 is always in point contact or linear contact with the rotor 12, and friction generated between the conductive transition piece and the rotor 12 can be effectively reduced, and abrasion between the conductive transition piece 21 and the rotor 12 is avoided.

In some embodiments, as shown in fig. 2-3, the second transition 212 is a hemisphere, such that point contact or linear contact between the conductive transition 21 and the conductive contact 22 also always occurs, so that wear between the conductive transition 21 and the conductive contact 22 can be effectively avoided.

For the static electricity leading-out mechanism, the whole arrangement is simple, and the static electricity leading-out mechanism can be installed only by arranging corresponding accommodating grooves on the rotor 12, so that the static electricity leading-out mechanism is very convenient to use; the use cost is low, and the operation is very reliable.

In some embodiments, as shown in fig. 2, the first transition 211 and the second transition 212 are connected to form a sphere. That is, the conductive transition piece 21 has a spherical shape. By this arrangement, the conductive transition piece 21 is very simple to manufacture, and the cost can be effectively reduced. In addition, when the ball rotates by friction with the inner wall of the receiving groove 120, it rotates smoothly in any direction, so that stable operation of the conductive transition piece 21 can be ensured.

In some embodiments, the first transition portion 211 and the second transition portion 212 are integrally formed, which is beneficial to guaranteeing the stability of the conductive transition piece 21 and avoiding the problems of breaking and damaging the connection portion during use.

In some embodiments, as shown in FIG. 2, the center of sphere of the conductive transition piece 21 is located on the axis of rotation of the rotor 12. So configured, the conductive transition piece 21 has a relatively low linear velocity during rotation with the rotor 12. In the case where the rotation speed is small, friction between the conductive transition piece 21 and the rotor 12 or the conductive contact piece 22 is reduced, and abrasion to which the conductive transition piece 21 is subjected can be effectively reduced.

In some examples, the receiving groove 120 is formed in a central position of the rotor 12 at the second end 122 such that an axis of the receiving groove 120 is aligned with a rotational axis of the rotor 12. And after the conductive transition piece 21 is put into the accommodation groove 120, the center of sphere of the conductive transition piece 21 is naturally located on the rotation axis of the rotor 12.

In some embodiments, as shown in fig. 3, the conductive transition piece 21 further includes a connection portion 213 connected between the first transition portion 211 and the second transition portion 212, the connection portion 213 is disposed in a column shape, and the conductive transition piece 21 is disposed symmetrically about a first plane through which an axis of the connection portion 213 passes. The conductive transition piece 21 is quite regular, and the first transition portion 211 and the second transition portion 212 located at two ends of the connecting portion 213 are respectively in contact with the accommodating groove 120 and the conductive contact piece 22, so that the connecting portion 213 has a longer length under the condition that the accommodating groove 120 is smaller, and better contact between the second transition portion 212 and the conductive contact piece 22 is ensured.

In some embodiments, as shown in fig. 2, the contact end of the second transition portion 212 with the conductive contact 22 is located outside the accommodation groove 120. The receiving recess 120 includes a semi-enclosed region that does not extend beyond the plane of the second end of the rotor 12. In this way, the conductive contact 22 does not need to be partially disposed in the accommodating recess 120, so that the conductive contact 22 contacts the second transition portion 212, and thus, interference of the conductive contact 22 with rotation of the rotor 12 is avoided. In addition, with the above arrangement, after the conductive transition piece 21 is mounted in the accommodating groove 120, the second transition portion 212 of the conductive transition piece 21 can partially protrude from the accommodating groove 120, which also facilitates the conductive contact piece 22 to form an abutment against the conductive transition piece 21.

In some embodiments, the material of the conductive transition piece 21 is a magnetic conductor. By this arrangement, the conductive transition piece 21 can be adsorbed on the rotor 12 when not rotating while ensuring good conductivity, thereby avoiding the loss of the conductive transition piece due to falling off when the rotor is detached.

In some embodiments, the conductive contact 22 is a metal spring foil. The conductive contact 22 has a certain elasticity, which is beneficial to the installation of the conductive transition piece 21, and simultaneously can ensure that the conductive transition piece 21 and the conductive contact 22 can be kept in close contact for a long time, thereby improving the static electricity leading-out effect.

In some examples, the conductive contact 22 is detachably connected to the housing 11. Illustratively, the conductive contact 22 may be threadably connected to the housing 11. Also by way of example, the conductive contact 22 and the housing 11 may be connected by means of bolts and nuts. Also exemplary, the conductive contact 22 may be connected to the housing 11 by an interference fit. The above examples are illustrative only, as long as the fixing of the conductive contact 22 to the housing 11 and the contact between the conductive contact 22 and the conductive transition 21 can be achieved.

It should be noted that, in fig. 1, the housing 11 to which the conductive contact 22 is connected and the housing 11 to which the bearing 13 is mounted indicate different portions of the housing 11, and thus, different filling patterns are used for filling, which does not mean that one of them is not fixed to the housing 11. However, the specific form of the housing 11 and the actual sub-components it contains, and those skilled in the art can flexibly arrange according to actual needs, and the present disclosure is not limited thereto.

In some embodiments, as shown in fig. 2, the receiving recess 120 is a tapered recess, which facilitates rapid tooling of the second end 122 to form the receiving recess 120 to enable installation of the conductive transition piece 21.

In the case where the conductive transition piece 21 is a sphere, the side surface of the first transition portion 211 may form a line contact with the inner wall of the accommodating groove 120, the line of contact surrounding the first transition portion 211 one turn. Illustratively, the tapered recess is circular at the second end surface, with the center of the circle being concentric with the center of the sphere of the conductive transition piece 21. Thus, the coordination of the conductive transition piece 21 along with the movement of the rotor can be well ensured; meanwhile, the side surface of the first transition portion 211 forms a line contact with the inner wall of the receiving groove 120, which is advantageous in reducing a contact area therebetween, thereby reducing wear of the conductive transition piece 21.

In other embodiments, the receiving recess 120 is a hemispherical recess, so that the receiving recess 120 can well receive the conductive transition piece 21, thereby achieving contact between the conductive transition piece 21 and the conductive contact 22 and the rotor 12.

In the case where the conductive transition piece 21 is a sphere, the side surface of the first transition portion 211 may form a line contact with the inner wall of the accommodating groove 120, the line of contact surrounding the first transition portion 211 one turn. Illustratively, the hemispherical recess is circular at the second end surface, with the center of the circle being concentric with the center of the sphere of the conductive transition piece 21. Thus, the coordination of the conductive transition piece 21 along with the movement of the rotor can be well ensured; meanwhile, the side surface of the first transition portion 211 forms a line contact with the inner wall of the receiving groove 120, which is advantageous in reducing a contact area therebetween, thereby reducing wear of the conductive transition piece 21.

In still other embodiments, the receiving recess 120 is a cylindrical recess configured to facilitate rapid tooling of the second end 122 to form the receiving recess 120, and further, the receiving recess 120 is configured to receive the conductive transition piece 21 to facilitate contact between the conductive transition piece 21 and the conductive contact 22 and the rotor 12.

The foregoing is merely illustrative of the embodiments of the present invention, and the present invention is not limited thereto, and any person skilled in the art will recognize that changes and substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An electrostatic derivation mechanism for a bearing rotor system, wherein the bearing rotor system comprises a housing, a rotor, and a bearing, the rotor being secured to the housing by the bearing; the rotor has a first end configured to be connected to a driving device and rotated by the driving device, and a second end having a receiving groove; the static electricity leading-out mechanism comprises a conductive transition piece and a conductive contact piece: the conductive transition piece comprises a first transition portion and a second transition portion which are connected with each other, the first transition portion is located in the accommodating groove and is in contact with the inner wall of the accommodating groove, the second transition portion is in contact with the conductive contact piece, and the conductive contact piece is fixed on the shell.

2. The electrostatic delivery mechanism of claim 1, wherein the first transition is a hemisphere; and/or

The second transition part is a hemispherical body.

3. The electrostatic delivery mechanism of claim 2, wherein the first transition and the second transition are connected to form a sphere.

4. A static electricity discharge mechanism according to claim 3, wherein the centre of sphere is located on the axis of rotation of said rotor.

5. The static electricity discharge mechanism according to claim 3, wherein the first transition portion and the second transition portion are integrally formed.

6. The static electricity discharge mechanism according to claim 1, wherein the conductive transition piece further comprises a connecting portion connected between the first transition portion and the second transition portion, the connecting portion is arranged in a column shape, the conductive transition piece is symmetrically arranged about a first plane, and an axis of the connecting portion is located on the first plane.

7. The electrostatic discharge mechanism of claim 1, wherein a contact end of the second transition portion with the conductive contact is located outside the receiving recess.

8. The static electricity discharge mechanism of claim 1, wherein the conductive transition piece is a magnetic conductive transition piece.

9. The electrostatic discharge mechanism of any one of claims 1-8, wherein the conductive contact is a metal spring foil.

10. The electrostatic discharge mechanism according to any one of claims 1 to 8, wherein the accommodation groove is any one of: conical grooves, hemispherical grooves, and columnar grooves.