CN110752494B

CN110752494B - Pressure equalizing type constant-pressure carbon brush supporting device

Info

Publication number: CN110752494B
Application number: CN201911041000.5A
Authority: CN
Inventors: 张兴旺; 张兴辉; 王岩禄; 魏玉国; 马永良; 刘宇; 王艳武; 田昕; 李敏
Original assignee: Harbin Electric Machinery Co Ltd
Current assignee: Harbin Electric Machinery Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-12-29
Anticipated expiration: 2039-10-30
Also published as: CN110752494A

Abstract

The invention discloses a pressure equalizing type constant-pressure carbon brush supporting device which comprises a first corrugated pipe, a second corrugated pipe, a first communicating branch pipe, a second communicating branch pipe, a ring pipe, a main pipe, a balancing weight, a sealing cylinder body and an air valve. The first corrugated pipe and the second corrugated pipe are made of H-grade insulating materials and can freely stretch out and draw back within a certain range, the upper sealing surface of the sealing cylinder body is made of soft modified polyvinyl chloride, and the pressure values of the ends of the first corrugated pipe and the second corrugated pipe can be indirectly adjusted by adjusting the weight of the balancing weight on the sealing material.

Description

Pressure equalizing type constant-pressure carbon brush supporting device

The technical field is as follows:

the invention relates to a pressure equalizing type constant-pressure carbon brush supporting device.

Background art:

the carbon brushes used by the hydraulic generator all need to use a constant-pressure spring as a rear end support, so that a certain pressure is formed between the carbon brushes and the collecting rings. Each carbon brush corresponds to one constant-voltage spring, but the pressure consistency of the constant-voltage springs is poor, so that the pressure between each carbon brush and the collecting ring is different, the contact resistance is also different, the current passing through each carbon brush is different, the current of each individual carbon brush is larger, the temperature is higher, even the individual carbon brush is burnt, the safe and stable operation of the generator is influenced, and no specific measure can be used for solving the problems that the contact pressure between each carbon brush and the collecting ring is different and the contact resistance difference is larger at present.

The invention content is as follows:

the invention aims to disclose a voltage-equalizing constant-voltage carbon brush supporting device, which can ensure that the contact pressure and the contact resistance of each carbon brush are consistent with those of a collecting ring, so that the current of each carbon brush is equal and the temperature rise is consistent. The technical scheme of the invention is as follows: the sealing device comprises a first corrugated pipe, a second corrugated pipe, a first communicating branch pipe, a second communicating branch pipe, a ring pipe, a main pipe, a balancing weight, a sealing cylinder body and a valve, wherein the ring pipe is communicated with the sealing cylinder body through the main pipe, one end of the first communicating branch pipe and one end of the second communicating branch pipe are led out from the ring pipe, the other end of the first corrugated pipe and the other end of the second communicating branch pipe are respectively connected with the first corrugated pipe and the second corrugated pipe, one ends of the first corrugated pipe and the second corrugated pipe, which are in contact with a first carbon brush and a second carbon brush, are sealed, the first corrugated pipe and the second corrugated pipe are made of H-grade insulating materials, the upper.

The technical effects are as follows:

the telescopic lengths of the first corrugated pipe (1) and the second corrugated pipe (2) meet the use requirement of the carbon brush abrasion loss. The first corrugated pipe (1) and the second corrugated pipe (2) are made of H-grade insulating materials. The upper sealing surface of the sealing cylinder body (8) is made of soft modified polyvinyl chloride, the horizontal position of the sealing cylinder body can change up and down along with the difference between the internal pressure and the external pressure of the sealing cylinder body (8), and the up-down change amount meets the use requirement of the expansion amount of the corrugated pipe. And the specific size design of the balancing weight (7) is carried out according to the specific requirements of different carbon brushes on the supporting pressure. The air valve (9) can inject air into the sealed cylinder body (8), and the counterweight block (7) is stopped at a proper position through the upper surface of the sealed cylinder body which can float up and down, so that certain pressure is kept in the sealed cylinder body (8). Pressure sources of the first corrugated pipe (1) and the second corrugated pipe (2) are all from the sealing cylinder body (8), so that output pressures of contact ends of the first corrugated pipe (1) and the second corrugated pipe (2) with the first carbon brush (10) and the second carbon brush (11) are equal, and therefore the contact pressure between the electric brush and the collecting ring can be guaranteed to be consistent, the contact resistance is equal, and the current flowing through the electric brush is equal in magnitude. The pressure in the cylinder body is mainly determined by the weight of the balancing weight (7), so the pressure output by the end parts of the first corrugated pipe (1) and the second corrugated pipe (2) is constant in the telescopic range of the corrugated pipes.

Each branch pipe in the pressure equalizing type constant-pressure carbon brush supporting device is communicated with the sealing cylinder body, the air pressure is the same, the pressure applied to the electric brush by the contact end part of the corrugated pipe and the electric brush is the same, the pressure of each electric brush and the pressure of the collecting ring are the same, the contact resistance is similar, the current flowing through each carbon brush is similar, and the current, the temperature rise and even burning of the individual carbon brush can be avoided.

Description of the drawings:

FIG. 1 is a top view of a voltage-sharing constant-voltage carbon brush supporting device

FIG. 2 is a sectional view taken along line A-A of FIG. 1

The specific implementation mode is as follows:

as shown in fig. 1 and fig. 2, a pressure-equalizing constant-pressure carbon brush supporting device comprises a first corrugated pipe 1, a second corrugated pipe 2, a first communicating branch pipe 3, a second communicating branch pipe 4, an annular pipe 5, a main pipe 6, a balancing weight 7, a sealing cylinder 8 and an air valve 9. The ring pipe 5 is communicated with the sealing cylinder body 8 through the main pipe 6, one end of the branch pipe 3 and one end of the branch pipe 4 are led out from the ring pipe 5, the other end of the branch pipe is respectively connected with the first corrugated pipe 1 and the second corrugated pipe 2, and one ends of the first corrugated pipe 1 and the second corrugated pipe 2, which are in contact with the first carbon brush 10 and the second carbon brush 11, are sealed. The telescopic length of the first corrugated pipe 1 and the second corrugated pipe 2 meets the use requirement of the carbon brush abrasion loss. The first bellows 1 and the second bellows 2 are made of H-class insulating material. The balancing weight 7 is placed on the upper surface of the sealing cylinder body 8, the upper sealing surface of the sealing cylinder body 8 is made of soft modified polyvinyl chloride, the horizontal position of the balancing weight can change up and down along with the difference between the internal pressure and the external pressure of the sealing cylinder body 8, and the up-down change amount meets the use requirement of the expansion amount of the corrugated pipe. The specific size design of the counterweight 7 is carried out according to the specific requirements of different carbon brushes on the supporting pressure. The air valve 9 can inject air into the sealed cylinder 8, and the counterweight 7 is stopped at a proper position through the upper surface of the sealed cylinder which can float up and down, so that certain pressure is in the sealed cylinder 8. The pressure sources of the first corrugated pipe 1 and the second corrugated pipe 2 are all from the sealing cylinder body 8, so that the output pressures of the contact ends of the first corrugated pipe 1 and the second corrugated pipe 2 with the first carbon brush 10 and the second carbon brush 11 are equal, thereby ensuring that the contact pressure between the electric brush and the collecting ring is consistent, the contact resistance is equal, and the current flowing through the electric brush is equal. The pressure in the cylinder is mainly determined by the weight of the counterweight 7, so the pressure output from the ends of the first corrugated pipe 1 and the second corrugated pipe 2 is constant in the telescopic range of the corrugated pipes.

Claims

1. The utility model provides a pressure-equalizing constant voltage carbon brush strutting arrangement which characterized in that: comprises a first corrugated pipe (1), a second corrugated pipe (2), a first communicating branch pipe (3), a second communicating branch pipe (4), a ring pipe (5), a main pipe (6), a balancing weight (7), a sealing cylinder body (8) and an air valve (9), ring canal (5) are through being responsible for (6) and sealed cylinder body (8) intercommunication, first intercommunication branch pipe (3) and second intercommunication branch pipe (4) one end are drawn forth from ring canal (5), first bellows (1) and second bellows (2) are connected respectively to the other end, first bellows (1) and second bellows (2) and first carbon brush (10), the one end of second carbon brush (11) contact is sealed, first bellows (1) and second bellows (2) are made by H level insulating material, sealed face is soft modified polyvinyl chloride on sealed cylinder body (8), balancing weight (7) are placed at sealed cylinder body (8) upper surface.