Spiral type variable capacity buffer and work method thereof

Abstract

The invention relates to a spiral type variable capacity buffer and a work method thereof. The variable capacity buffer comprises a cylinder body, a first piston, a first piston rod, a bump head, anda valve block; the first piston, the first piston rod and the bump head are sequentially connected, the first piston is located in the cylinder body, the cylinder body is sealed through the first endcover, a spiral line groove is formed in the first piston, a magnetically controlled shape memory alloy block is arranged in the spiral line groove, the position, between the bump head and the first end cover, of the first piston rod is sleeved with a first reset spring, an electromagnetic coil is arranged on the periphery of the cylinder body, and the bottom of the cylinder body is connected withthe valve block. Compared with a common spiral line groove structure, the buffer has the beneficial effects that a series of spiral grooves are formed in the piston, the magnetically controlled shapememory alloy block is arranged in the groove of the first piston, according to various working conditions, the capacity of the spiral line grooves can be adjusted in a self-adaptation manner, the local resistance is changed, good controllability is achieved, the magnetically controlled shape memory alloy block is high in deforming response speed, the circulation capacity of the spiral line grooves can be rapidly adjusted, and the buffer range of the buffer is large.

Description

technical field [0001] The invention relates to a spiral variable capacity buffer and a working method thereof, belonging to the technical field of buffers. Background technique [0002] In the prior art, there are buffers with a single oil cylinder structure and inner and outer cylinder double oil cavity structures. For example, the Chinese patent document CN104299862A discloses a buffer with an inner and outer cylinder double oil chamber structure. During the working process of the buffer, when the piston rod drives the piston to move backward, the hydraulic oil enters the piston cover and the piston through the separation aid hole. Between, the piston cover and the piston are separated smoothly, the axial oil hole on the piston is not blocked by the piston cover, the hydraulic oil on the rear side of the piston flows to the front side of the piston through two lines, one line is the axial oil hole on the piston, The other one is the rear radial oil hole, the annular gap ...

AI Technical Summary

Problems solved by technology

[0003] However, whether it is a single-cylinder or multi-cylinder buffer, once the current buffer structure is manufactured, its structure is fixed. When performing buffering, the buffering process is not stable and the peak pressure is high for different external loads. The buffering process is uncontrollable and poorly adaptable, and the buffering resistance cannot be automatically adjusted according to different working conditions

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