Single-action reciprocating type hydraulic booster

Abstract

The invention discloses a single-action reciprocating type hydraulic booster. An oil inlet P, an oil return opening T and a high-pressure oil outlet H are arranged, and a pressure cylinder and a pilot-operated type hydraulic control reversing valve are included. The pressure cylinder comprises a low-pressure cylinder, a low-pressure piston, an end cover, a high-pressure plunger and a high-pressurecylinder. A first oil inlet flow channel, a second oil inlet flow channel, a first control flow channel and a second control flow channel are arranged on the low-pressure cylinder. An annular communicating groove is formed in the low-pressure piston. When the low-pressure piston moves leftwards to the extreme position of the left end, the first oil inlet flow channel and the first control flow channel communicate through the communicating groove in the low-pressure piston, and the pilot-operated type hydraulic control reversing valve is controlled to change over. When the low-pressure pistonmoves rightwards to the extreme position of the right end, the second oil inlet flow channel and the second control flow channel communicate through the communicating groove in the low-pressure piston, the pilot-operated type hydraulic control reversing valve is controlled to change over, and therefore the low-pressure piston is controlled to reciprocate. The booster is simple in structure and does not need to be electronically controlled.

Description

technical field [0001] The invention relates to the technical field of hydraulic boosters, in particular to a single-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. At present, the traditional hydraulic booster used in China controls the reciprocating motion of the booster to continuously output high pressure through the continuous reversing of the electromagnetic reversing valve. The structure is complex, and complex displacement sensors and electronic control components need to be installed. Inconvenient to carry, difficult to use in flammable and explosive occasions and portable machinery, such as natural gas compres...

AI Technical Summary

Problems solved by technology

At present, the traditional hydraulic booster used in China controls the reciprocating motion of the booster to continuously output high pressure through the continuous reversing of the electromagnetic reversing valve. The structure is complex, and complex displacement sensors and electronic control components need to be installed. Inconvenient to carry, difficult to use in flammable and explosive occasions and portable machinery, such as natural gas compression sub-stations, garbage compression stations, oil mines, coal injection, etc. have explosion-proof requirements, and the objective requirement is that the hydraulic booster pump can meet the needs of personnel without close distance The automatic reciprocating hydraulic pressure booster on the market that does not need electronic control mostly uses the displacement of the low-pressure piston for feedback and controls the hydraulic control reversing valve for reversing. Because the displacement of the low-pressure piston and the hydraulically controlled reversing valve affect each other, that is, when the low-pressure piston reaches the position, the hydraulically controlled reversing valve is controlled to reversing, but once the hydraulically controlled reversing valve is reversing, the displacement of the low-pressure piston changes. The displacement speed of the low-pressure piston is slowed down under the condition of small oil port flow rate, and the existing supercharger is prone to reversing failure and unreliable work

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