Integrated electro-hydraulic proportional hydraulic valve bank

A technology integrating electro-hydraulic and hydraulic valve groups, applied in the field of hydraulic system, can solve the problems of large energy loss and large action shock, and achieve the effect of stable LS pressure, compact piping, and stable system

Active Publication Date: 2012-10-03
卢宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quantitative pumps and ordinary reversing valves are generally used in existing cranes. The fixed displacement pump has full displacement at full speed. For the actuator with small flow rate, the

Method used

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  • Integrated electro-hydraulic proportional hydraulic valve bank
  • Integrated electro-hydraulic proportional hydraulic valve bank
  • Integrated electro-hydraulic proportional hydraulic valve bank

Examples

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Example Embodiment

[0023] The present invention will be described in further detail below in conjunction with the embodiments of the drawings.

[0024] Such as Figure 1 to Figure 6 As shown, the icon numbers are explained as follows: oil inlet connection 1, unit basic connection 2, transition net body 3, first damping body 4, valve stem 5, return spring 6, throttle groove 7, working oil passage A, working oil passage B, unit proportional directional valve DV, pilot-operated pressure reducing valve JYF, drain line L, sensitive circuit LS, pressure oil line P, unit secondary relief valve PR, first safety valve R1, second safety valve R2, The third safety valve R3, the unit proportional compensation valve SC, the return oil passage T, the pilot oil passage X, the protection safety valve XLF, the unit electromagnetic proportional pressure reducing valve Y.

[0025] In the embodiment of the present invention, the integrated electro-hydraulic proportional hydraulic valve group includes the oil inlet coup...

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PUM

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Abstract

The invention discloses an integrated electro-hydraulic proportional hydraulic valve bank, which includes an oil inlet pair and a unit basic pair that are matched in an adhering way, wherein the oil inlet pair is internally provided with a pilot-operated reducing valve and a first safety valve; the inlets of the pilot-operated reducing valve and the first safety valve are connected with a pressure oil passage; the outlet of the pilot-operated reducing valve is connected with a pilot oil passage, and the outlet of the first safety valve is connected with an oil return passage; the unit basic pair is internally provided with unit proportional reversing valves, and unit electromagnetic proportional reducing valves are mounted at the two drive ends of each unit proportional reversing valve; the pressure opening of each unit proportional reversing valve is connected with the pilot oil passage; the proportional speed regulation superimposition and multiple actuating mechanisms are adopted, and the proportional flowrate distribution during the linkage operation is free from the influences of the external load variation and the maximum pump output; the pressure stabilizing oil source arranged on the oil inlet pair provides a pilot oil source for the system; and by adopting the electromagnetic proportional reducing valve on the two sides of the basic pair to control the pushing of the valve rod, the electric signals are converted into hydraulic force, and the repeatability precision is high.

Description

technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to an integrated electro-hydraulic proportional hydraulic valve group, which is suitable for variable pump systems of hydraulic vehicle cranes in engineering machinery. Background technique [0002] With the continuous development of my country's truck crane industry and the continuous advancement of hydraulic system technology, in order to meet various working conditions, people have higher and higher requirements for the accuracy and stability of crane operations. [0003] Modern hydraulic engineering machinery, while pursuing the high efficiency and energy saving of proportional speed regulation and proportional flow distribution, in order to meet various installation and other operation requirements, the requirements for operating valves are also getting higher and higher, and its performance directly affects the performance of the whole machine. Performance directly a...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 卢宇
Owner 卢宇
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