Split flow control module, dual main pump oil supply system, hydraulic system and construction machinery

Abstract

The invention provides a diversion and confluence control module, a double main pump oil supply system, a hydraulic system and construction machinery, and relates to the field of hydraulic technology. The diversion and confluence control module includes a first input oil circuit, a second input oil circuit and a control valve group ; The first input oil circuit communicates with the working chamber of the first actuator, the second input oil circuit communicates with the working chamber of the second actuator, and the control valve group communicates with the first input oil circuit and the second input oil circuit. The control valve group can control the opening and closing of the dividing and converging valve connected on the converging oil circuit between the first main implementing oil circuit and the second main implementing oil circuit through the working pressure of the first input oil circuit and / or the second input oil circuit , the first pressure relief valve connected in parallel with the first main executive oil circuit is closed, and the second pressure relief valve connected in parallel with the second main executive oil circuit is closed. When the first actuator is working alone or the second actuator is working alone, oil supply can be combined, and the two main pumps are used reasonably, which solves the problem of energy waste.

Description

technical field [0001] The invention relates to the technical field of hydraulic pressure, in particular to a diversion and confluence control module, a double main pump oil supply system, a hydraulic system and engineering machinery. Background technique [0002] At present, small and medium-sized construction machinery usually uses a single main pump or double main pumps to supply oil to the system in one direction. When a single main pump is used for oil supply, the main pump is generally a large-displacement pump, and each actuator is connected to a compensation oil circuit, and a compensation valve is set on the compensation oil circuit. The actuator will inevitably cause switching impact during compound actions. The principle block diagram is as follows: figure 1 shown. When dual main pumps are used for one-way oil supply, the two main pumps are respectively corresponding to the two actuators to supply oil, and a confluence oil circuit is added between the two actuat...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a split-and-merge control module to alleviate the problem in the prior art that during the oil supply process of the dual main pumps, when the actuator with a smaller load acts independently, the other main pump is always unloading. Technical issues that result in wasted energy

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