Single oil cylinder hydraulic buffer

Abstract

The invention discloses a single oil cylinder hydraulic buffer. The buffer comprises an oil cylinder, a piston, a reset elastic element, a clamping fork and an oil cylinder cover, wherein the oil cylinder is a single oil cylinder and comprises a high-pressure oil cavity and a low-pressure oil cavity, one ends of the two oil cavities communicate in the axial direction, the other ends of the two oilcavities are closed, and the diameter of the low-pressure oil cavity is larger than that of the high-pressure oil cavity; the piston with an oil permeation hole is arranged in the oil cylinder, and along the direction from the high-pressure oil cavity to the low-pressure oil cavity, the hole diameter of the oil permeation hole is gradually reduced; a piston rod on the piston is movably extended out of the oil cylinder from the closed end of the low-pressure oil cavity, the clamping fork capable of driving the piston to move to the closed end of the high-pressure oil cavity is fixedly arrangedon the extending end, and the reset elastic element capable of driving the piston to reset after moving is arranged between the clamping fork and the oil cylinder cover; and the oil cylinder is filled with hydraulic oil. According to the oil cylinder, a single oil cylinder buffering mechanism is adopted, the effect of a double-oil-cylinder buffering mechanism is achieved, buffer characteristics are consistent in horizontal arrangement, vertical arrangement and oblique arrangement, and a breaker is guaranteed to be stable and excellent in opening and closing performance; and the buffer is small in size, simple and compact in structure, low in cost and beneficial to machining and assembly.

Description

technical field [0001] The invention relates to the field of high-voltage power transmission, in particular to a single-cylinder hydraulic buffer for absorbing excess energy of opening of a circuit breaker. Background technique [0002] During the opening process of the circuit breaker mechanism, after the opening is in place, the buffer mechanism needs to be used to absorb the excess energy, so as to avoid the sharp impact of other components after the opening is in place and the mechanical limit, causing damage to system components. [0003] The currently commonly used buffer mechanism is a single oil cylinder, using steel balls or segmented pistons as a one-way valve (such as CN105047446 A), but when this buffer structure is arranged horizontally, the bottom of the piston cannot be fully immersed by the hydraulic oil, causing air to enter high pressure The cushioning performance of the buffer in the oil chamber is unstable during the opening process, the buffering capacit...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a single-cylinder hydraulic buffer, which can be arranged horizontally, vertically and obliquely, avoiding the difficult processing and complex assembly problems of double-cylinder buffer mechanisms together, significantly reducing costs and reducing double-cylinder seals. face, reduce the risk of oil leakage, and at the same time solve the problem that the single cylinder cannot be used horizontally

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