Buffer sleeve and working cylinder of hydraulic device using buffer sleeve

Abstract

The invention relates to a buffer sleeve and a working cylinder of a hydraulic device using the buffer sleeve. The buffer sleeve is arranged between a stopping step and a plugging head of the workingcylinder of the hydraulic device, and an inner hole allowing a buffer shaft of a piston to be inserted is formed in the buffer sleeve. Oil passing grooves are formed in the end surface of the end, faraway from the plugging head, of the buffer sleeve, and the oil passing grooves communicate with the inner hole of the buffer sleeve. According to the buffer sleeve and the working cylinder of the hydraulic device using the buffer sleeve, due to the fact that the buffer sleeve is arranged between the stopping step and the plugging head of the working cylinder of the hydraulic device, when the working cylinder of the hydraulic device is started, oil can enter the oil passing grooves through gaps between the piston and the inner hole of the buffer sleeve, and the oil entering the oil passing grooves has a driving effect on the piston. Compared with the prior art, the action area of initial oil on the piston is expanded, so that the moving speed of the piston can be increased, thus improvingthe starting force of the working cylinder of the hydraulic device so as to achieve the effect of improving the starting speed of the working cylinder of the hydraulic device.

Description

technical field [0001] The invention relates to a buffer sleeve and a working cylinder of a hydraulic device using the buffer sleeve. Background technique [0002] The hydraulic operating mechanism uses the incompressible principle of liquid to send high-pressure oil to both sides of the working cylinder to realize the opening and closing of the circuit breaker, such as the hydraulic operating mechanism of the circuit breaker disclosed in the invention patent application with the publication number CN101527206A. [0003] Such as figure 1 and figure 2 As shown, the working cylinder of the hydraulic operating mechanism in the prior art includes a cylinder body 1, a piston 2 that is guided and moved in the piston chamber of the cylinder body 1, a plug 4 that is blocked at one end of the piston chamber, and moves axially Buffer sleeve 3 assembled in the piston cavity. The working process of the working cylinder when the hydraulic operating mechanism is closed and started is:...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned working cylinder has the following problems: when the switch is closed, when the buffer sleeve 3 moves the stroke of L2, when the piston 2 has not yet completed the stroke of L1, because the oil hole 5 of the buffer sleeve 3 and the gap between the buffer sleeve 3 and the piston 2 The cross-sectional area of ​​the gap is much smaller than the ring area of ​​the piston 2, resulting in insufficient oil supply in the piston chamber, insufficient starting force of the piston 2, and the "crawling" phenomenon of the piston 2, which in turn leads to longer closing time or unstable closing time

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