A double-acting reciprocating hydraulic pressure booster

Abstract

The invention relates to a double-action reciprocating hydraulic booster which comprises a boosting device and an automatic reversing control valve, and is characterized in that: the upper end and the lower end of the control valve core of the automatic reversing control valve are respectively connected with an upper piston and a lower piston; the cross sectional area of the upper piston is more than that of the lower piston; a first oil port of the automatic reversing control valve is communicated with a lower low-pressure cavity, a second oil port of the automatic reversing control valve is communicated with an upper low-pressure cavity, an oil return port of the automatic reversing control valve is communicated with an oil return channel, and a high-pressure oil port of the automatic reversing control valve is communicated with a high-pressure oil channel; the boosting part is also provided with an oil inlet runner, an oil return runner, a first control runner and a second control runner; a circular communicating groove is arranged on the peripheral surface of a low-pressure plunger; and the first control runner and the second control runner are communicated with an upper chamber of the upper piston through first bypass channels. Compared with an electromagnetic reversing valve, the automatic reversing control valve has a simpler structure, is controlled with a single pole, so that the boosting frequency is not reduced, the operation is reliable, and the purpose of high-frequency boosting can be achieved.

Description

technical field [0001] The invention relates to a booster, in particular to a double-acting reciprocating hydraulic booster capable of reliable automatic and continuous boosting. Background technique [0002] The hydraulic booster is an ultra-high pressure hydraulic component that amplifies the hydraulic pressure by using the principle that the two ends of the piston have different acting areas and the same force, and the hydraulic booster can increase the low pressure to 200MPa and above. Hydraulic boosters can be divided into three types: single-acting single-stroke booster, single-acting reciprocating booster and double-acting reciprocating booster. Since the single-acting single-stroke supercharger can only move in one direction, it is limited by the stroke and the output flow is limited, so it cannot achieve continuous supercharging, and its application range is narrow; It can pressurize one way, the utilization rate of oil source is only half, and the output flow is a...

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Problems solved by technology

[0004] 1. Because the stroke reversing valve uses steel ball positioning and chains to keep it in two positions, and controls the booster cylinder to move in different directions, the structure is complicated and the processing is difficult

And the positioning of the steel ball is easy to fail, the chain is broken, and the stroke control reversing valve will be in the floating position, that is, the booster cylinder stops moving, so this control method is unreliable

[0005] 2. It adopts two-stage control of the stroke control valve and the main reversing valve. On the one hand, the structure is relatively complicated; on the other hand, it will inevitably reduce the boosting frequency of the supercharger, and the large flow output cannot be achieved.

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