SU408384A1 - HYDRAULIC BUFFER - Google Patents

Description

one

The invention relates to electrical equipment, in particular parts of high-voltage switch 1.

Hydraulic buffers are known that contain a hollow piston provided with choke holes and a spring-loaded element that covers these holes, changing their flow sections.

However, the known hydraulic buffers are complex in design and have an insufficiently stable braking characteristic.

In the proposed hydraulic buffer, the spring-loaded element is designed as a spool bushing, forming a cavity with the piston, for example, an annular one communicating with the piston cavity through the throttle bores.

This allows to simplify the design and improve the braking performance of the device.

The drawing shows a constructive implementation of the hydraulic buffer.

In the housing 1 with a lid 2, a piston 3 with a striker 4 and a spring 5 are placed. The piston 3 has an internal cavity 6 in which a plunger 7 with a spring 8 and a throttle device consisting of a spool bushing 9 with a spring 10 are located. The spool bushing 9 with a piston 3 form a cavity And, connected by holes 12 with a sub-piston cavity.

The piston 3 has side profiled bores 13 that overlap the slide sleeve 9. In the lower part of the piston 3 a valve 14 is located, which bores the bores 15 during the operation of the buffer.

Hydraulic buffer works as follows.

When zdar moving parts of the mechanism of the switch on the striker 4, the latter along with

the piston 3 moves downward, compressing the spring 5. The resulting fluid pressure under the piston 3 closes the apertures 15 with a valve 14; fluid pressure on the annular surface of the spool sleeve 9 annular

the cavity 11 through the hole 12, the spool bushing 9, compressing the spring 10, moves upwards, opening the shaped holes 13. The liquid flows through the shaped holes 13 into the internal cavity 6

the piston 3 moves the plunger 7, compressing the spring 8, and displaces the air from the cavity 6 to the atmosphere.

The return of the movable parts of the buffer to its original position is carried out under the action

springs 5 and 8.

Subject invention

Hydraulic buffer, for example, for high-voltage circuit breakers containing hollow

a piston provided with choke holes, and a spring-loaded element covering these holes, modifying their flow areas, characterized in that, in order to simplify the design and improve

the braking characteristic, the submerged element is designed as a spool bushing, which forms a cavity with the piston, for example, an annular one, which communicates with the subarm through the throttle bores.