CN214957373U

CN214957373U - 600MW generator brush pigtail formula earthing device

Info

Publication number: CN214957373U
Application number: CN202121231250.8U
Authority: CN
Inventors: 刘超; 姜兆福; 李锋; 包乌兰哈达
Original assignee: Huaneng Yimin Coal and Electricity Co Ltd
Current assignee: Huaneng Yimin Coal and Electricity Co Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-11-30
Anticipated expiration: 2031-06-03

Abstract

600MW generator brush pigtail formula earthing device. The abrasion loss of the contact position of the rotor large shaft and the grounding carbon brush device is large, the radial runout value exceeds the standard, and the radial amplitude of the grounding carbon brush exceeds 2mm under high-speed rotation. The utility model discloses the constitution includes: bottom plate (1), the bottom plate on be fixed with fixed block (5), the inner chamber of fixed block in wear to be equipped with depression bar (7), the depression bar on the cover have spring (8), the end fixing of depression bar have clamp plate (9), the side of fixed block be fixed with two risers (4), brush pigtail and shape change piece (2) pass through the bolt fastening two the riser between, the shape change piece be located brush pigtail upper end. The utility model is used for 600MW generator formula ground connection.

Description

600MW generator brush pigtail formula earthing device

Technical Field

The utility model relates to a 600MW generator brush pigtail formula earthing device.

Background

The 600MW generator earthing device of power plant fixed mounting is in generator vapour side (on the 8W sealed tile shell), and the operating position is near generator rotor vapour side shaft coupling, and because the service life is longer, rotor macroaxis is great with ground connection carbon brush device contact position wearing and tearing volume, and the radial runout value exceeds standard, and the radial amplitude of ground connection carbon brush exceeds 2mm under the high-speed rotation. In addition, the generator sealing tile leaks oil, which causes the working surface of the carbon brush to be broken and ignited. The maintenance cost is high because 4 carbon brushes need to be replaced on average every day. Because the vibration carbon brush and the rotating shaft can be separated instantly, the contact resistance is unstable, and the Rg value swing of the rotor in one-point grounding protection is influenced.

Disclosure of Invention

The utility model aims at providing a 600MW generator brush pigtail formula earthing device.

The above purpose is realized by the following technical scheme:

the utility model provides a 600MW generator brush pigtail formula earthing device which constitutes and includes: the bottom plate, the bottom plate on be fixed with the fixed block, the inner chamber of fixed block in wear to be equipped with the depression bar, the depression bar on the cover have a spring, the end fixing of depression bar have a clamp plate, the side of fixed block be fixed with two risers, the pigtail passes through the bolt fastening with the deformation piece and is two the riser between, the deformation piece be located the pigtail upper end.

600MW generator brush pigtail formula earthing device, the bottom plate on seted up the mounting hole.

Has the advantages that:

1. the utility model discloses make brush pigtail and pivot contact under the pressure of clamp plate, brush pigtail formula area of contact is big, and the extending direction of brush pigtail arranges for following the direction of rotation, has fine effect of moving away to avoid possible earthquakes. The hidden danger of carbon brush vibration, striking sparks is eliminated, and greatly reduced the maintenance cost, saved the manpower, avoided the problem such as the Rg value swing in the unit operation process simultaneously.

Description of the drawings:

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

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of the present invention in use;

in the figure: 1. a base plate; 2. deformation sheets; 3. brushing the plait; 4. a vertical plate; 5. a fixed block; 6. an inner cavity; 7. a pressure lever; 8. a spring; 9. pressing a plate; 10. mounting holes; 11. a rotor base; 12. and a rotor.

The specific implementation mode is as follows:

example 1:

the utility model provides a 600MW generator brush pigtail formula earthing device which constitutes and includes: bottom plate 1, the bottom plate on be fixed with fixed block 5, this fixed bonding is fixed, the inner chamber 6 of fixed block in wear to be equipped with depression bar 7, the depression bar on the cover have a spring 8, the one end and the inner chamber of spring are fixed, the other end is fixed with the depression bar, the end fixing of depression bar have clamp plate 9, this fixed bonding is fixed, the side of fixed block be fixed with two risers 4, brush pigtail 3 passes through the bolt fastening with deformation piece 2 and is two the riser between, deformation piece be located brush pigtail upper end.

Example 2:

according to the 600MW generator brush braid grounding device in embodiment 1, the bottom plate is provided with a mounting hole 10.

The working principle is as follows: when the device is used, as shown in fig. 3, the bottom plate is fixed on the rotor seat 11 through the bolts, then the pressing plate is enabled to press the deformation sheet all the time under the action of the spring, so that the braid is kept in contact with the rotor 12, and meanwhile, the deformation sheet is located at the upper end of the braid, so that the braid can be prevented from tilting up under the high-speed rotation of the rotor.

Claims

1. The utility model provides a 600MW generator brush pigtail formula earthing device which constitutes and includes: the bottom plate, characterized by: the bottom plate on be fixed with the fixed block, the inner chamber of fixed block in wear to be equipped with the depression bar, the depression bar on the cover have a spring, the end fixing of depression bar have a clamp plate, the side of fixed block be fixed with two risers, the pigtail passes through the bolt fastening with the deformation piece and is in two the riser between, the deformation piece be located the pigtail upper end.

2. A 600MW generator shunt grounding device according to claim 1, wherein: the bottom plate is provided with a mounting hole.