CN216681619U

CN216681619U - Carbon brush grinding tool

Info

Publication number: CN216681619U
Application number: CN202122102884.XU
Authority: CN
Inventors: 郭利; 刘仁龙; 周星; 周斌; 刘浩林; 郭强; 胡晓明
Original assignee: Huaneng Daqing Thermal Power Co Ltd
Current assignee: Huaneng Daqing Thermal Power Co Ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-06-07
Anticipated expiration: 2031-09-01

Abstract

The utility model provides a carbon brush grinding tool which comprises a dummy shaft and a brush holding ring, wherein the size of the dummy shaft is the same as that of a collector ring of a generator, the brush holding ring is sleeved on the dummy shaft and is rotationally connected with the dummy shaft, a plurality of mounting holes for mounting brush holders are formed in the brush holding ring, the dummy shaft comprises a fixing part and a rotating part, the fixing part is a hollow cylinder, an axial through hole is formed in the center of the end face of the fixing part, the rotating part is a solid cylinder, an axial connecting shaft is arranged in the center of the end face of the rotating part and is matched with the through hole, and the fixing part is rotationally connected with the rotating part. According to the utility model, the dummy shaft is used for simulating the working environment of the carbon brush to grind the carbon brush, so that the contact sectional area of the ground carbon brush and the outer surface of the collecting ring is increased, the current is ensured to be uniform, the pressure on the outer surface of the metal collecting ring is reduced, the friction damage of the carbon brush to the surface of the collecting ring is reduced, and the friction heating is greatly reduced.

Description

Carbon brush grinding tool

Technical Field

The utility model relates to the technical field of generator matching tools, in particular to a carbon brush grinding tool.

Background

The Brush (Brush) is an important component of the electric machine, and is also called a carbon Brush because it is made of graphite. The carbon brushes of the generator are mounted on the collector rings, and the working surfaces of the carbon brushes need to be ground smooth because the carbon brushes are responsible for conducting current between the rotating and stationary parts.

The existing scheme is that plane abrasive paper is used for grinding, the angle can not be adjusted, the matching degree with a circular collecting ring is not high, the contact sectional area between the collector ring and the outer surface of the collecting ring is small due to incomplete contact after installation, the pressure of the collector ring to the outer surface of a metal collecting ring is increased, the friction damage to the surface of the collecting ring is increased, and the problems of friction heating, non-uniform flow and the like can be caused during work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a carbon brush grinding tool, which can increase the contact sectional area of a ground carbon brush and the outer surface of a collecting ring, ensure uniform current and reduce the pressure on the outer surface of a metal collecting ring;

the utility model provides a carbon brush grinding tool which comprises a dummy shaft and a brush holding ring, wherein the size of the dummy shaft is the same as that of a collector ring of a generator, the brush holding ring is sleeved on the dummy shaft and is rotationally connected with the dummy shaft, a plurality of mounting holes for mounting brush holders are formed in the brush holding ring, the dummy shaft comprises a fixing part and a rotating part, the fixing part is a hollow cylinder, an axial through hole is formed in the center of the end face of the fixing part, the rotating part is a solid cylinder, an axial connecting shaft is arranged in the center of the end face of the rotating part and is matched with the through hole, and the fixing part is rotationally connected with the rotating part.

Further, a bearing is arranged inside the fixing portion, the bearing outer ring is fixedly connected with the fixing portion, and the bearing inner ring is fixedly connected with the connecting shaft.

Furthermore, a handle is arranged on the end face of the connecting shaft.

Furthermore, the rotating part is sleeved with gauze.

Furthermore, the outer surface of the rotating part is provided with a frosting layer.

Furthermore, the inner wall of the brush holding ring is provided with a limiting check ring.

According to the technical scheme, the dummy shaft simulates the working environment of the carbon brush to grind the carbon brush, so that the contact sectional area of the ground carbon brush and the outer surface of the collecting ring is increased, the current is ensured to be uniform, the pressure on the outer surface of the metal collecting ring is reduced, the friction damage of the carbon brush to the surface of the collecting ring is reduced, and the friction heating is greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is a schematic view of a brush ring according to the present invention;

FIG. 4 is a schematic view showing a construction of a dummy shaft according to the present invention;

FIG. 5 is a schematic view showing a structure of a rotating portion of the dummy shaft according to the present invention;

FIG. 6 is a schematic view of a fixing portion of a dummy shaft according to the present invention;

description of reference numerals:

1-false shaft, 101-rotating part, 102-connecting shaft, 103-handle, 104-fixing part, 2-brush holding ring, 201-limit retainer ring, 202-mounting hole and 3-bearing;

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-6

A carbon brush grinding tool includes a dummy shaft 1 and a brush holder ring 2.

The dummy shaft 1 comprises a fixing portion 104 and a rotating portion 101, the fixing portion 104 is a hollow cylinder, an axial through hole is formed in the center of the end face of the fixing portion 104, a bearing 3 is arranged inside the fixing portion 104, the size of an outer ring of the bearing 3 is the same as that of the inner wall of the fixing portion 104, the size of an inner ring of the bearing 3 is the same as that of the through hole of the fixing portion 104, the outer ring of the bearing 3 is fixedly connected with the inner wall of the fixing portion 104, the rotating portion 101 is a solid cylinder, an axial connecting shaft 102 is arranged in the center of the end face of the rotating portion 101, the connecting shaft 102 is matched with the through hole, and the inner ring of the bearing is fixedly connected with the connecting shaft. The fixing portion 104 is rotatably connected to the connecting shaft 102 via a bearing 3.

The brush holding ring 2 is a metal circular ring, the brush holding ring 2 is sleeved on the fixing part 104 of the false shaft 1, the brush holding ring 2 and the rotating part 101 of the false shaft rotate relatively, and a plurality of mounting holes 202 for mounting the brush holder are arranged on the brush holding ring 2. The brush holder is a mechanical guide groove which is used for containing and maintaining the position of the carbon brush in the brush motor, and the mounting hole 202 can enable the brush holder to be rotatably connected with the brush holder ring 2, so that the angle between the brush holder and the brush holder ring 2 can be adjusted, and the angle is adjusted to be the same as the angle of each brush holder of the generator. In order to avoid axial deviation between the brush holding ring 2 and the dummy shaft 1, a limit retainer ring 201 is arranged on the inner wall of the brush holding ring 2.

In order to simulate the actual use environment of the carbon brush, the size of the dummy shaft 1 is the same as that of a collector ring of the generator. The rotating part 101 is directly contacted with the carbon brush installed in the brush holder, and the purpose of grinding the working surface of the carbon brush is achieved through relative rotation between the rotating part and the carbon brush. For more efficient grinding, a handle 103 is provided on the end face of the connecting shaft 102. The user can rotate the rotation portion 101 rotation that handle 103 drove the false axle, will increase the roughness of rotation portion 101 working face promptly the axial plane in order to guarantee the quality of grinding, so the cover has the gauze on rotation portion 101, except that the surface that uses gauze rotation portion 101 can also be equipped with the dull polish layer, grinds the carbon brush through the dull polish layer.

When the device is used, the brush holder on the generator is required to be installed in the installation hole 202 on the brush holder ring 2, and the angle between the brush holder and the brush holder ring 2 is adjusted to be the same as the angle of each brush holder of the generator. Then the carbon brush to be ground is installed in the brush holder, the operating handle 103 drives the rotating part 101 to grind the brush holder, the contact area between the qualified carbon brush ground by the device and the outer surface of the collecting ring is larger than that between the qualified carbon brush ground by the original process and the outer surface of the collecting ring, so that the pressure of the qualified carbon brush ground by the device on the outer surface of the metal collecting ring is reduced, the friction damage to the surface of the collecting ring is reduced due to the reduction of the pressure, and the friction heating value is effectively reduced. The service life of the collecting ring is prolonged, and the waviness of the outer surface of the collecting ring is slowed down, so that the abrasion speed of the carbon brush is reduced, and the cost is reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a carbon brush grinding tool, its characterized in that, includes false axle and brush holder ring, the size of false axle is the same with the size of the collecting ring of generator, the brush holder ring overlaps and is in on the false axle, the brush holder ring with the false axle rotates to be connected, be equipped with a plurality of mounting holes that are used for installing the brush holder on the brush holder ring, the false axle includes fixed part and rotation portion, the fixed part is a hollow cylinder, the terminal surface center of fixed part is equipped with axial through-hole, rotation portion is a solid cylinder, the terminal surface center of rotation portion is equipped with the axial connecting axle, the connecting axle with the through-hole cooperatees, the fixed part with rotation portion rotates to be connected.

2. The carbon brush grinding tool according to claim 1, wherein a bearing is provided inside the fixing portion, the bearing outer ring is fixedly connected to the fixing portion, and the bearing inner ring is fixedly connected to the connecting shaft.

3. The carbon brush grinding tool according to claim 1, wherein a handle is provided on an end surface of the connecting shaft.

4. The carbon brush grinding tool as claimed in claim 1, wherein the rotating portion is covered with gauze.

5. The carbon brush grinding tool according to claim 1, wherein an outer surface of the rotating portion is provided with a frosted layer.

6. The carbon brush grinding tool of claim 1, wherein a limit stop is provided on an inner wall of the brush grip ring.