CN216929813U

CN216929813U - Grounding device for reducing induced voltage of generator

Info

Publication number: CN216929813U
Application number: CN202123103019.3U
Authority: CN
Inventors: 温暖; 黄世杆; 张可心
Original assignee: GUANGZHOU HUANTOU TECHNOLOGY EQUIPMENT CO LTD
Current assignee: GUANGZHOU HUANTOU TECHNOLOGY EQUIPMENT CO LTD
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-07-08
Anticipated expiration: 2031-12-08

Abstract

The utility model relates to the technical field of motors, in particular to a grounding device for reducing the induced voltage of a generator, which comprises two carbon brushes, a rotating shaft and a motor shell, wherein the rotating shaft is rotatably arranged in the motor shell, the two carbon brushes are arranged in the motor shell through screws, the two carbon brushes are respectively contacted with the surface of the rotating shaft, a current-conducting plate is arranged outside the motor shell, the surface of the current-conducting plate is connected with two conducting wires, and the two conducting wires are respectively connected with the two carbon brushes. This scheme is the most inboard carbon brush of cancellation for original three carbon brush reduces to two carbon brushes in the axis of rotation, not only can effectively reduce because of carbon brush wearing and tearing, strike sparks and lead to the unit number of times that stops, can maintain generating set safety and stability operation, can also effectively cut off the epaxial induced voltage of generator macroaxis, prevents that axle journal and axle bush surface from burning out because of the galvanic corrosion, brews the great vicious accident of generator.

Description

Grounding device for reducing induced voltage of generator

Technical Field

The utility model relates to the technical field of motors, in particular to a grounding device for reducing the induced voltage of a generator.

Background

When the generator runs at a high speed, the large shaft can generate tens of volts or even hundreds of volts of peak induction voltage, the induction voltage is very easy to cause that the shaft necks at the two ends of the large shaft of the rotor of the generator break through oil films to discharge to the bearing bushes, electric arcs cause that pockmarks are generated on the surfaces of the shaft necks and the bearing bushes, the shaft necks and the bearing bushes are further burnt in severe cases, the abrasion of the carbon brushes is accelerated, and the threat to the safe operation of the generator set is caused. The utility model aims to solve the technical problems that the shaft voltage of a generator has electric corrosion to a bearing bush and a carbon brush is abraded too fast.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a grounding device for reducing the induced voltage of a generator.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides an earthing device about reducing generator induced voltage, two carbon brushes, axis of rotation and motor housing in the motor, the axis of rotation rotates the inside of installing at motor housing, two the carbon brush passes through the inside of mounting screw at motor housing, two the carbon brush respectively with the surface contact of axis of rotation, the current conducting plate has been placed to motor housing's outside, the surface connection of current conducting plate has two conductor wires, and two conductor wires are connected with two carbon brushes respectively.

Preferably, the surface of the motor housing is provided with two wire holes, and the two wire holes are sized to allow two conductive wires to pass through.

Preferably, a bolt is installed between the conductive plate and the motor housing in a threaded mode.

Preferably, one of the conductive wires is a flexible wire having a radial dimension of not less than 10mm 2.

Preferably, the conductive plate is an aluminum plate.

Compared with the prior art, the utility model has the following beneficial effects:

this scheme is the most inboard carbon brush of cancellation for original three carbon brush reduces to two carbon brushes in the axis of rotation, not only can effectively reduce because of carbon brush wearing and tearing, strike sparks and lead to the unit number of times that stops, can maintain generating set safety and stability operation, can also effectively cut off the epaxial induced voltage of generator macroaxis, prevents that axle journal and axle bush surface from burning out because of the galvanic corrosion, brews the great vicious accident of generator.

Drawings

FIG. 1 is a schematic diagram of a carbon brush at the tail of a generator according to the present invention, which relates to a grounding device for reducing the induced voltage of the generator;

fig. 2 is a structural diagram of a tail carbon brush of an original generator.

In the figure: rotating shaft 1, carbon brush 2, conductor wire 3, current conducting plate 4, bolt 5, motor shell 6.

Detailed Description

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in fig. 1, the grounding device for reducing the induced voltage of the generator includes two carbon brushes 2 in the motor, a rotating shaft 1 and a motor housing 6, the rotating shaft 1 is rotatably installed inside the motor housing 6, the two carbon brushes 2 are installed inside the motor housing 6 through screws, the two carbon brushes 2 are respectively in contact with the surface of the rotating shaft 1, a conductive plate 4 is placed outside the motor housing 6, a bolt 5 is threadedly installed between the conductive plate 4 and the motor housing 6, and the bolt 5 improves the stability of the previous connection between the conductive plate 4 and the motor housing 6. The conductive plate 4 is an aluminum plate. The conductive plate 4 has the dimensions of an inner diameter phi 375mm, an annular ring 80mm, an outer diameter phi 535mm and a thickness of 8 mm.

The surface of the conductive plate 4 is connected with two conductive wires 3, and the two conductive wires 3 are respectively connected with the two carbon brushes 2. Two wire holes are formed in the surface of the motor shell 6, and the two wire holes can be used for two conducting wires 3 to penetrate through. The wire guide hole can be passed by conducting wire 3, so that conducting plate 4 can be connected with carbon brush 2 through conducting wire 3. One of the conductive wires 3 is a flexible wire having a radial dimension of not less than 10mm 2. The conducting wire 3 flexibly connects the binding post with the grounding point of the generator large shaft. And the other path is used for monitoring the grounding of a relay protection rotor of the generator.

The scheme is mainly characterized in that the innermost carbon brush in a figure 2 mode is omitted, the original three carbon brushes on the rotating shaft are reduced to two carbon brushes in a figure 1 mode, the number of times of machine set shutdown caused by abrasion and sparking of the carbon brushes can be effectively reduced due to the reduction of the number of the carbon brushes, and safe and stable operation of the generator set can be maintained.

The foregoing shows and describes the general principles, principal features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an earthing device about reducing generator induced voltage, two carbon brushes (2), axis of rotation (1) and motor housing (6) in the motor, its characterized in that, axis of rotation (1) are rotated and are installed in the inside of motor housing (6), two carbon brush (2) are through the inside of mounting screw at motor housing (6), two carbon brush (2) respectively with the surface contact of axis of rotation (1), current conducting plate (4) have been placed to the outside of motor housing (6), the surface connection of current conducting plate (4) has two conductor wire (3), and two conductor wire (3) are connected with two carbon brushes (2) respectively.

2. The grounding device for reducing the induced voltage of the generator as claimed in claim 1, wherein the surface of the motor housing (6) is provided with two wire holes, and the two wire holes are sized for two conductive wires (3) to pass through.

3. A grounding device in connection with generator induced voltage reduction according to claim 1, characterized in that a bolt (5) is threadedly mounted between the conducting plate (4) and the motor housing (6).

4. A grounding device in connection with lowering the induced voltage of a generator according to claim 1, characterized in that one of said conducting wires (3) is a flexible wire with a radial dimension not less than 10mm 2.

5. A grounding device in connection with reducing the induced voltage of a generator according to claim 1, characterized in that the conductive plate (4) is an aluminum plate.