Integrated valve with flow distribution being irrelevant to load pressure and throttling edge being controlled independently

Abstract

The invention discloses a high-response integrated valve with flow distribution being irrelevant to load pressure and a throttling edge being controlled independently. The integrated valve comprises a multi-connected valve bank, a supply oil path P, an oil return path T and a load sensitive oil path LS, wherein the multi-connected valve bank shares a unique supply oil path P, oil return path T and load sensitive oil path LS; the multi-connected valve bank comprises N valve banks, namely, a first-connected valve bank, a second-connected valve bank, ..., a (N-1)th-connected valve bank and a Nth-connected valve bank respectively; N is a natural number being greater than or equal to 2; the first-connected valve bank, the second-connected valve bank, ..., the (N-1)th-connected valve bank and the Nth-connected valve bank have the same composition structures, and are provided with two output oil ports connected with a hydraulic actuator; the first-connected valve bank comprises five two-position and two-way electrohydraulic proportional valves, two shuttle valves, two one-way valves and two pressure compensating valves. The integrated valve is simple in structural composition, is convenient to design and machine, and has high interchangeability.

Description

technical field [0001] The invention relates to a high-response integrated valve with independent control of throttling in a hydraulic system, in particular to an integrated valve with independent control of throttling and independent of load pressure for flow distribution. Background technique [0002] A hydraulic system in which flow distribution is independent of load pressure refers to a load-independent flow distribution system that controls the pump and pressure compensation with the highest load pressure of the actuator. The principle is to place the pressure compensating valve behind the main valve to compensate the system pressure after the valve. When multiple actuators work at the same time, the pressure of the actuator with the highest pressure is used to compensate the pressure of the actuator with the lower pressure, so that any The pressure difference of each actuator can be kept constant at all times. Therefore, the proportional distribution of the flow of m...

AI Technical Summary

Problems solved by technology

The flow distribution control valve usually has only one control spool. The two-way control of the single spool on the throttling side will inevitably cause throttling loss and energy consumption of one of the two, which will result in lower efficiency and response performance of the hydraulic system.

At the same time, it is often necessary to design and process different types of control spools for different types of hydraulic actuators, resulting in poor interchangeability of flow distribution control valves and difficulties in spool design and processing.

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