A quick plug-in device for carbon brush holder of generator

Abstract

The invention discloses a quick plug-in device for a carbon brush holder of a generator, comprising a base, a quick plug-in brush holder, a carbon brush, a carbon brush connector and a brush holder locking device; the base is movably connected to the quick plug-in brush holder; a positioning groove is provided at one end of the base, and the locking device fixes the quick plug-in brush holder and the base through the positioning groove; the quick plug-in brush holder is fixed with a carbon brush fixing frame, and the carbon brush is arranged in the carbon brush fixing frame; the base and the quick plug-in brush holder are provided with through holes, and the carbon brush connector passes through the through holes; one end of the carbon brush connector is connected to the carbon brush braid, and the other end is connected to the carbon brush holder. The invention can directly dismantle the carbon brush and the brush holder as a whole, which greatly facilitates the replacement of the carbon brush; it can more thoroughly clean the carbon deposits on the brush holder and the brush holder; it greatly shortens the time and risk of replacing the carbon brush, and has the characteristics of being more convenient and safe.

Description

Technical Field

[0001] The invention relates to the technical field of generator carbon brush holders, and in particular to a quick plug-in and pull-out device for a generator carbon brush holder. Background Art

[0002] The slip ring of a hydro-turbine generator set is generally installed on the main shaft of the turbine. It rotates with the rotation of the main shaft and is the rotating part of the hydro-turbine generator set. The carbon brush is mainly used to connect the rotating part and the stationary part of the generator and provide the output of the rectifier cabinet to the generator rotor. The carbon brush is an important part of the generator excitation system. Due to long-term contact with the high-speed rotating slip ring, it is easy to cause abnormal operating conditions such as sparking, poor contact, and severe wear. Therefore, it needs to be replaced regularly and the carbon deposits need to be cleaned.

[0003] The general steps for replacing carbon brushes are: first remove the spring clip of the carbon brush that needs to be replaced, and use a special wrench to loosen the brush braid fastening screws. When loosening the fastening screws, do not loosen them too much to prevent the screws from falling off; remove the brush braid, then remove the carbon brush, and the reinstallation process is the opposite. In this process, due to insufficient space and installation position, common tools such as wrenches are usually inconvenient to operate. Small parts such as screws, carbon brushes, and gaskets that are removed can easily fall into the unit, especially when the unit is running. There are also many dangers such as electric shock and grounding. Therefore, it is necessary to design a new carbon brush device that can quickly plug and unplug carbon brushes under power. Summary of the invention

[0004] The purpose of the present invention is to provide a quick-plugging device for a generator carbon brush holder in order to solve the above-mentioned problems, comprising a base, a quick-plugging brush holder, a carbon brush, a carbon brush connector and a brush holder locking device; the base is movably connected to the quick-plugging brush holder; one end of the base and one end of the quick-plugging brush holder are both provided with positioning grooves, and the locking device fixes the quick-plugging brush holder and the base through the positioning grooves; the quick-plugging brush holder is fixed with a carbon brush fixing frame, and the carbon brush is arranged in the carbon brush fixing frame; the base and the quick-plugging brush holder are provided with through holes, and the carbon brush connector passes through the through holes; one end of the carbon brush connector is connected to the carbon brush braid, and the other end is connected to the carbon brush holder.

[0005] Preferably, linear grooves are provided on both sides of the quick-plug brush holder; positioning rails parallel to the linear grooves are provided on both sides of the base; the positioning rails are connected to the linear grooves for limited sliding of the quick-plug brush holder.

[0006] Preferably, the carbon brush connector includes an electrical screw, a flat copper braid, a compression spring and a contact; one end of the flat braid is connected to the electrical screw, and the other end is connected to the contact; the electrical screw is used to connect the carbon brush braid; the contact is used to connect the carbon brush holder; one end of the compression spring is connected to the electrical screw, and the other end is connected to the contact, for contact between the contact and the brush holder.

[0007] Preferably, the brush holder locking device comprises a locking spring and locking components arranged at both ends of the locking spring; a locking hook is arranged at one end of the locking component away from the locking spring for cooperating with the positioning groove.

[0008] Preferably, a spring clip is further provided at one end of the carbon brush fixing frame for limiting the position of the carbon brush.

[0009] The beneficial effects of the present invention are as follows: the present invention can directly remove the carbon brush and the brush holder as a whole by operating the brush holder locking device, without removing any screws at the installation position, which greatly facilitates the replacement of the carbon brush; after the brush holder is removed, the carbon deposits on the brush holder and the brush holder can be cleaned more thoroughly without the risk of parts falling into the unit; the device uses a standardized interface, and a spare brush holder with installed carbon brushes can be prepared before replacement, and a new carbon brush assembly can be installed after the old carbon brush assembly is removed; the time and risk of replacing the carbon brushes is greatly shortened, especially for medium and small generator sets that are limited by replacement space, or where it is inconvenient to replace them under power due to high risks, and the device is more convenient and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention;

[0011] Figure 2 It is a schematic diagram of the structure of the base;

[0012] Figure 3 It is a structural diagram of the quick-plug brush holder and the carbon brush fixing frame;

[0013] Figure 4 It is a structural diagram of the carbon brush connector;

[0014] Figure 5 It is a schematic diagram of the mechanism of the brush holder locking device.

[0015] In the figure: 1-base; 2-quick plug-in brush holder; 3-carbon brush; 4-carbon brush connector; 5-brush holder locking device; 6-carbon brush fixing frame; 7-carbon brush braid; 8-positioning groove; 9-positioning guide rail; 10-through hole; 11-1, 11-2-positioning groove; 12-straight groove; 13-electrical screw; 14-flat copper braid; 15-compression spring; 16-contact; 17-locking component; 18-locking hook; 19-locking spring. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings:

[0017] As attached Figure 1As shown, the present invention provides a quick plug-in device for a carbon brush holder of a generator, comprising a base, a quick plug-in brush holder, a carbon brush, a carbon brush connector and a brush holder locking device; the base is movably connected to the quick plug-in brush holder; one end of the base and one end of the quick plug-in brush holder are both provided with positioning grooves, and the locking device fixes the quick plug-in brush holder and the base through the positioning grooves; the quick plug-in brush holder is fixed with a carbon brush fixing frame, and the carbon brush is arranged in the carbon brush fixing frame; the base and the quick plug-in brush holder are provided with through holes, and the carbon brush connector passes through the through holes; one end of the carbon brush connector is connected to the carbon brush braid, and the other end is connected to the carbon brush holder.

[0018] Preferably, linear grooves are provided on both sides of the quick-plug brush holder; positioning rails parallel to the linear grooves are provided on both sides of the base; the positioning rails are connected to the linear grooves for limited sliding of the quick-plug brush holder.

[0019] Preferably, the carbon brush connector includes an electrical screw, a flat copper braid, a compression spring and a contact; one end of the flat braid is connected to the electrical screw, and the other end is connected to the contact; the electrical screw is used to connect the carbon brush braid; the contact is used to connect the carbon brush holder; one end of the compression spring is connected to the electrical screw, and the other end is connected to the contact, for contact between the contact and the brush holder.

[0020] Preferably, the brush holder locking device comprises a locking spring and locking components arranged at both ends of the locking spring; a locking hook is arranged at one end of the locking component away from the locking spring for cooperating with the positioning groove.

[0021] Preferably, a spring clip is further provided at one end of the carbon brush fixing frame for limiting the position of the carbon brush.

[0022] The device comprises a base, a quick-plug brush holder, a carbon brush, a carbon brush connector and a brush holder locking device.

[0023] Linear grooves are arranged on both sides of the quick-plug brush holder; positioning guide rails parallel to the linear grooves are arranged on both sides of the base; the positioning guide rails cooperate with the linear grooves, and the quick-plug brush holder can slide on the base.

[0024] The base and the quick-plug brush holder are both provided with through holes, and the carbon brush connector is connected to the brush holder through the through holes. One end of the carbon brush connector is fixed to the brush holder, and the power screw at the other end is connected to the carbon brush through the brush braid. The carbon brush connector includes a power screw, a flat copper braid, a compression spring and a contact; one end of the flat copper braid is connected to the power screw, and the other end is connected to the contact; the contact is used to connect the carbon brush holder; the power screw is locked with a nut. One end of the compression spring is connected to the power screw, and the other end is connected to the contact, to ensure that the contact is tightly connected to the brush holder to avoid heat caused by virtual connection of the contact.

[0025] The through hole on the base is a long hole, which is conducive to adjusting the distance between the quick plug-in brush holder and the positioning guide rail. The structure is simple and the base basically does not require maintenance after installation.

[0026] The carbon brush is installed in the fixed frame and fixed by spring clips. The quick plug-in and pull-out brush holder drives the carbon brush to move.

[0027] The working principle of the present invention is as follows: the quick-plug brush holder is placed opposite the positioning guide rail of the base, so that the linear grooves at both ends of the quick-plug brush holder are docked with the positioning guide rail, so that the positioning guide rail is stuck in the linear groove, and the quick-plug brush holder is pushed into the base along the positioning guide rail, until the brush holder locking device reaches the positioning grooves on both sides of one end of the base; hold the brush holder locking device and press the locking spring sheet inward to bring the two locking hooks close to each other and install them into the positioning grooves on both sides of one end of the base, release the locking spring sheet, and the brush holder locking device is quickly fixed to the base, and the quick-plug brush holder is locked with the base at the same time; hold the brush holder locking device and press the locking spring sheet inward, after the locking hooks leave the positioning grooves on both sides of the base, take out the brush holder locking device, and take out the quick-plug brush holder and the carbon brush.

[0028] When the carbon brush and the quick-plug brush holder are installed or removed as a whole, you only need to operate the locking device to easily unlock the quick-plug brush holder and the carbon brush and install or remove the whole. The inner groove on the base ensures that the brush holder cannot move up and down, and the brush holder locking device ensures that the brush holder cannot move forward and backward. The brush holder is fixed through its special structure. The brush braid of the carbon brush is not directly connected to the brush holder, but is connected to the carbon brush connector and then contact-connected to the brush holder through the carbon brush connector. There is no need to remove any screws during the removal and installation of the brush holder, thereby realizing the rapid removal and installation of the carbon brush.

[0029] The present invention can directly remove the carbon brush and the brush holder as a whole by operating the brush holder locking device without removing any screws at the installation position, which greatly facilitates the replacement of the carbon brush; after the brush holder is removed, the carbon deposits on the brush holder and the brush holder can be cleaned more thoroughly without the risk of parts falling into the unit; the device uses a standardized interface, and a spare brush holder with installed carbon brushes can be prepared before replacement, and a new carbon brush assembly can be installed after the old carbon brush assembly is removed; the time and risk of replacing the carbon brushes are greatly shortened, especially for medium and small generator sets that are limited by replacement space or have difficulty in replacement due to the high risk of live replacement, and the device has the characteristics of being more convenient and safer.

[0030] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A quick plug-in and pull-out device for a carbon brush holder of a generator, characterized in that: It includes a base, a quick-plug brush holder, a carbon brush, a carbon brush connector and a brush holder locking device; the base is movably connected to the quick-plug brush holder; one end of the base and one end of the quick-plug brush holder are both provided with positioning grooves, and the locking device fixes the quick-plug brush holder and the base through the positioning grooves; the quick-plug brush holder is fixed with a carbon brush fixing frame, and the carbon brush is arranged in the carbon brush fixing frame; the base and the quick-plug brush holder are provided with through holes, and the carbon brush connector passes through the through holes; one end of the carbon brush connector is connected to the carbon brush braid, and the other end is connected to the carbon brush holder; The two sides of the quick-plug brush holder are provided with linear grooves; the two sides of the base are provided with positioning rails parallel to the linear grooves; the positioning rails are connected to the linear grooves for limited sliding of the quick-plug brush holder; The carbon brush connector includes a power screw, a flat copper braid, a compression spring and a contact; one end of the flat braid is connected to the power screw, and the other end is connected to the contact; the power screw is used to connect the carbon brush braid; the contact is used to connect the carbon brush holder; one end of the compression spring is connected to the power screw, and the other end is connected to the contact, so that the contact is in contact with the brush holder; The brush holder locking device comprises a locking spring and locking components arranged at both ends of the locking spring; a locking hook is arranged at one end of the locking component away from the locking spring for cooperating with the positioning groove.

2. According to claim 1, a quick plug-in and pull-out device for a carbon brush holder of a generator, characterized in that: A spring clip is also provided at one end of the carbon brush fixing frame for limiting the position of the carbon brush.

3. According to claim 1, a quick plug-in and pull-out device for a carbon brush holder of a generator, characterized in that: The through hole is a long hole.

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