Automatic-switch type load sensing hydraulic system
A load-sensitive, hydraulic system technology, applied in fluid pressure actuating devices, servo motors, servo motor components, etc., can solve the problems of low work efficiency and slow action speed of the actuator, achieve high work efficiency, improve control accuracy, cost reduction effect
Active Publication Date: 2015-05-20
WUHAN MARINE MACHINERY PLANT
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Problems solved by technology
Although this hydraulic system reduces the space occupied by the hydraulic components to a certain extent, since multiple actuators share an oil pump in parallel, when each actuator operates at the same time, each actuator is proportional to its load. Distributing the oil volume of the one oil pump, resulting in slow movement speed and low work efficiency of the two actuators
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] see Figure 1 ~ Figure 3 , the embodiment of the present invention provides an automatic switching load-sensing hydraulic system, which includes a load-sensing variable pump module 1, a first electro-hydraulic proportional valve module 2, a second electro-hydraulic proportional valve module 3, and a first actuator 4 and the second actuator 5; the first electro-hydraulic proportional valve module 2 and the second electro-hydraulic proportional valve module 3 are respectively connected to the first actuator 4 and the second actuator 5; the load sensitive variable pump module 1 includes a variable pump 1a And the load sensing valve 1c, the oil inlet port of the load sensing valve 1c is connected with the oil outlet port of the vari...
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The invention provides an automatic-switch type load sensing hydraulic system and belongs to the field of marine crane hydraulic systems. The system comprises a load sensing variable pump module, a first electro-hydraulic proportional valve module, a second electro-hydraulic proportional valve module, a first actuating mechanism, a second actuating mechanism and a series switching valve module, wherein the first electro-hydraulic proportional valve module and the second electro-hydraulic proportional valve module are respectively connected with the first actuating mechanism and the second actuating mechanism; the load sensing variable pump module comprises a variable pump and a load sensing valve which are connected to each other; the first electro-hydraulic proportional valve module comprises a first proportional directional control valve; the second electro-hydraulic proportional valve module comprises a second proportional directional control valve; and the first electro-hydraulic proportional valve module and the second electro-hydraulic proportional valve module are connected is series through the series switching valve module and share the load sensing variable pump module, and a T oil-return port of the first proportional directional control valve and a P oil-inlet port of the second proportional directional control valve are in communication. By the aid of the series switching valve module, all actuating mechanisms operate at the same time, and the maximum oil amount of the variable pump is shared.
Description
technical field [0001] The invention relates to the technical field of marine crane hydraulic systems, in particular to an automatic switching load sensitive hydraulic system. Background technique [0002] The driving methods of marine cranes and offshore platform cranes are basically electric-hydraulic drive, and its hydraulic control system is more important. A suitable hydraulic control system can not only save energy and reduce heat generation, but also reduce space occupation and cost in the layout of components. In the current market competition environment, cranes with first-class hydraulic control system and low cost are very competitive in the international market. [0003] At present, the hydraulic control system of floating cranes at home and abroad generally adopts the following two types: [0004] 1. Single-control hydraulic system, the control module of each actuator (that is, the electro-hydraulic proportional valve module) is supplied with oil by its own oi...
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IPC IPC(8): F15B11/16F15B13/02
Inventor 石磊姬红斌霍小剑任建辉
Owner WUHAN MARINE MACHINERY PLANT