Oil buffer for direct current and high voltage switch

Abstract

The invention provides an oil buffer for a direct current and high voltage switch, which can solve the problem that the energy absorption effect of an existing oil buffer for the direct current and high voltage switch is not ideal. A hollow inner cavity of an outer cylinder is filled with hydraulic oil; a buffer device and a pressure accumulation device are arranged in the hollow inner cavity of the outer cylinder from one side of a rear cover to one side of an outer stop cover in an extending manner sequentially; the buffer device comprises a piston rod and an inner cylinder arranged in the hollow inner cavity; a gap between the outer peripheral wall of the inner cylinder and the inner wall of the outer cylinder forms an overflow channel of the hydraulic oil and is connected with the pressure accumulation device; a first buffer cavity and a second buffer cavity which communicate with each other are formed in the inner cylinder; the front end of the piston rod sequentially penetrates through the outer stop cover and the pressure accumulation device and then is connected with a primary buffer component in the first buffer cavity; a second overflow through hole and a plurality of first overflow through holes are formed in the peripheral wall of the inner cylinder; and the first buffer cavity and the second buffer cavity communicate with the overflow channel at the exterior of theinner cylinder through the first overflow through holes and the second overflow through hole respectively.

Description

technical field [0001] The invention relates to the technical field of buffers, in particular to oil pressure buffers, in particular to oil pressure buffers for DC high voltage switches. Background technique [0002] The opening and closing mechanism of the DC high voltage switch is the core mechanism of the DC high voltage switchgear. The design is usually separated by electromagnetic cooperation with the disc spring. The separation mechanism is usually designed to operate at a speed of 8-20m / s, thereby generating ultra-high-speed impact kinetic energy. Usually, a buffer for DC high-voltage switch is installed at the bottom of the separation mechanism to absorb the ultra-high-speed impact kinetic energy generated by the mechanism, so that the opening and closing mechanism can be stopped smoothly and stably, and the mechanism is protected from too much impact, eliminating the need for separation. Brake spring vibration; at the same time, it can make the opening curve process...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides an oil pressure buffer for DC high-voltage switches, which can solve the problem of unsatisfactory energy absorption in existing oil pressure buffers for DC high-voltage switches, which tends to cause large rebound shocks to the mechanism and cause Problems that affect the stable operation of the equipment mechanism

Images