Digital pump-controlled differential hydraulic cylinder with its own power source

Abstract

The invention discloses a digital pump control differential motion hydraulic cylinder with a power source. The digital pump control differential motion hydraulic cylinder with the power source comprises a hydraulic actuating part hydraulic cylinder body and the hydraulic power part power source, wherein the power source is of the structure that an oil inlet and outlet of a rod cavity of the dual-action differential motion hydraulic cylinder body is communicated with an oil inlet and outlet of a rodless cavity of the dual-action differential motion hydraulic cylinder body through a fluid pipe which is sequentially connected with a first hydraulic control check valve, a hydraulic motor in two-way shunt hydraulic motors and a two-way quantitative hydraulic pump and a second hydraulic control check valve, a hydraulic opening of the other hydraulic motor in the two-way shunt hydraulic motors is communicated with a fluid pipeline between one hydraulic motor in the two-way shunt hydraulic motors and the two-way quantitative hydraulic pump, the other hydraulic opening of the other hydraulic motor in the two-way shunt hydraulic motors is communicated with an oil tank through a connecting pipeline, and a pump shaft of the two-way quantitative hydraulic pump is connected with a motor shaft of a motor. Due to the adoption of the digital pump control differential motion hydraulic cylinder with the power source, leakage is avoided, the structure is compact, and throttling loss is avoided.

Description

technical field [0001] The invention relates to a differential hydraulic cylinder, in particular to an integrated pump-controlled hydraulic power device with its own power source, belonging to the technical fields of electro-hydraulic control and mechanical manufacturing. Background technique [0002] There are two types of electro-hydraulic control systems: volume control and throttling control. Most electro-hydraulic systems for throttling control use reversing valves, which not only cannot withstand the long-term high-speed reversing requirements, but also cause excessive heating of the system due to throttling losses, resulting in energy waste. The new development direction is to directly control the hydraulic cylinder with the hydraulic pump. The most widely used actuators in hydraulic technology are single-head differential hydraulic cylinders. Due to the different areas of the rod cavity and the rodless cavity of the differential hydraulic cylinder, if the circuit p...

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Problems solved by technology

However, the rodless chamber of the differential hydraulic cylinder in this invention is always connected with the oil tank, the hydraulic system can only control the flow and pressure of the rod chamber, and the hydraulic actuator can only move in both directions under the action of external tension, so the use conditions are quite big limitations

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