CN2552151Y

CN2552151Y - Oil buffer for circuit breaker

Info

Publication number: CN2552151Y
Application number: CN 02245680
Authority: CN
Inventors: 柳连有; 赵妍; 王安心
Original assignee: Tianshui Changcheng Switchgear Co Ltd
Current assignee: Tianshui Changcheng Switchgear Co Ltd
Priority date: 2002-08-12
Filing date: 2002-08-12
Publication date: 2003-05-21
Anticipated expiration: 2012-08-12

Abstract

The utility model relates to an oil buffer for circuit breaker, and is characterized in that the utility model comprises an oil cup, a piston, an end cover, a back spring and a cap, wherein, the piston and the oil cup are in clearance operation, and the piston structure is in multi-hole port type, and the core part of the piston is a cavity. The hydraulic pressure oil liquid is mainly through the four small holes on the piston. When in initial position, four small holes are all communicated, and the oil clearance is maximum, and during the moving process downwards of the piston, the small holes are blocked one by one, and the oil clearance becomes smaller and smaller, and the separated valve of the breaker is finished. When the piston moves to the separated valve position, the oil clearance is the smallest. The buffer has stable characteristic, and the buffering power is not basally changed during the whole journey, thereby effectively improving the separated valve characteristic and solving the different problem caused by poor buffering property for the breaker in separated valve process.

Description

The circuit breaker oil bumper

Technical field

The utility model relates to oil bumper, particularly a kind of indoor high-voltage circuit breaker oil bumper that is applicable to.

Background technology

General oil bumper is in the breaker open operation process, and along with the moving contact movement velocity reduces gradually, its cushion effect also reduces gradually, if splitting lock cushioning device structural design is improper, it is indefinite to make the bounce-back of breaker open operation speed, separating brake parameter fluctuation such as duplicate.Dump energy can not get effective absorption, can cause that contact separating brake bounce-back amplitude is excessive, and can cause very big mechanical shock to whole circuit breaker, shortens the mechanical endurance of circuit breaker.

Summary of the invention

The purpose of this utility model is: a kind of novel circuit breaker oil bumper is provided, this buffer stability of characteristics, cushion effect is constant substantially in its whole stroke, thereby improved the opening characteristic of circuit breaker effectively, solved circuit breaker in the separating brake process because the caused variety of issue of oil bumper poor performance.

The purpose of this utility model is achieved in that a kind of circuit breaker oil bumper, it is characterized in that: comprise lubricating cup, piston, end cap, back-moving spring and cap; Wherein, piston and lubricating cup are matched in clearance, and piston structure is a porous mouth formula, and the core of piston is a cavity, hydraulic oil liquid is mainly passed through by four apertures on the piston, when initial position, four apertures are all unimpeded, the oil clearance maximum, move downward in the process at piston, aperture is plugged one by one, and oil clearance is more and more littler, and breaker open operation finishes; Piston moves to the separating brake position, the oil clearance minimum.Described piston core is a cavity, in the one side four equally spaced apertures is arranged, in order to the circulation hydraulic oil liquid.

Advantage of the present utility model is: in the separating brake process, its cushion effect can not reduce along with reducing of moving contact of breaker movement velocity, but remain on a constant level substantially, thereby can fully absorb the dump energy in the breaker open operation process, reduce separating brake bounce-back amplitude, improve circuit breaker and cut-off reliability, reduce of the impact of separating brake energy to circuit breaker, prolong the mechanical endurance of circuit breaker, and in the process of circuit breaker reclosing, its oil return speed is also fast than one-way valve structures.

Description of drawings

Fig. 1 is the piston structure figure of the utility model oil bumper;

Fig. 2 is in free position for the utility model oil bumper, and promptly circuit breaker is in the schematic diagram of closing position;

Fig. 3 oil bumper is in schematic diagram in the motion process;

Fig. 4 is in compression position for the utility model oil bumper, and promptly circuit breaker is in the schematic diagram of separating brake position.

Among the figure, the 1-cap; The 2-end cap; The 3-lubricating cup; The 4-piston; The 5-back-moving spring; The 6-transformer oil.

Embodiment

Referring to Fig. 1, Fig. 2, oil bumper is in free position, and piston 4 cores are a cavity, and the one side has four equally spaced apertures, and in order to the circulation hydraulic oil liquid, in this position, four apertures on the piston 4 are all unimpeded; Circuit breaker is in the middle of the separating brake process among Fig. 3, along with moving contact of breaker moves downward, roller compresses the cap 1 of oil bumper, piston 4 is moved downward at a high speed, fluid enters the epicoele of lubricating cup 3 by aperture, produce huge damping force simultaneously and play cushioning effect, along with piston moves downward, four oil throughs are blocked one by one.Move to the position of Fig. 4, breaker open operation finishes, and back-moving spring 5 is compressed to maximum position.Behind the breaker closing, roller leaves compression position, and piston 4 and cap 1 move upward under the effect of back-moving spring 5, and hydraulic oil liquid is got back to the cavity of resorption of lubricating cup 3 by aperture, returns to the initial position (see figure 2).

Claims

1, a kind of circuit breaker oil bumper is characterized in that: comprise lubricating cup, piston, end cap, back-moving spring and cap; Wherein, piston and lubricating cup are matched in clearance, and piston structure is a porous mouth formula, and the core of piston is a cavity, hydraulic oil liquid is mainly passed through by four apertures on the piston, when initial position, four apertures are all unimpeded, the oil clearance maximum, move downward in the process at piston, aperture is plugged one by one, and oil clearance is more and more littler, and breaker open operation finishes; Piston moves to the separating brake position, the oil clearance minimum.

2, circuit breaker oil bumper according to claim 1 is characterized in that: described piston core is a cavity, in the one side four equally spaced apertures is arranged, in order to the circulation hydraulic oil liquid.