Test System for Pilot Load Control Valve

A technology of load control and test system, which is used in the testing of fluid pressure actuation systems, fluid pressure actuation devices, mechanical equipment, etc., and can solve the problems of testing the performance parameters of unloadable control valves, different test methods and systems, etc.

Active Publication Date: 2015-11-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since there is no clear national and industry standard for the test system of load control valves in my country at present, there are different test methods and systems for the test of load control valves by various manufacturers and research institutions.
Moreover, often the test systems of each manufacturer and research institution can only test part of the performance of the load control valve, and cannot have a complete test of the various performance parameters of the load control valve

Method used

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  • Test System for Pilot Load Control Valve
  • Test System for Pilot Load Control Valve

Examples

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with drawings and embodiments.

[0021] like figure 1 As shown, the present invention includes main oil circuit hydraulic pump 1, pilot oil circuit hydraulic pump 2, proportional relief valve 3, manual relief valve 4, pilot two-way cartridge valve 5, main oil circuit pilot reversing valve 6, proportional Pressure reducing valve 7, pilot oil circuit pilot reversing valve 8, manual directional valve 9, measured load control valve 10, load pressure transmitter 11, oil return pressure transmitter 12, control pressure transmitter 13, flow meter 14, a power amplification device 15, a data acquisition card 16 and a computer 17.

[0022] The oil outlet of the main oil circuit hydraulic pump 1 is connected to the pressure oil port P9 of the manual directional valve 9, and the oil inlet P3 of the proportional relief valve 3 and the oil inlet A5 of the pilot two-way cartridge valve 5 are connected by bypass. Th...

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PUM

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Abstract

The invention discloses a testing system of a pilot-operated type load control valve. The testing system of the pilot-operated type load control valve comprises a main oil line hydraulic pump, a pilot-operated oil line hydraulic pump, a proportional overflow valve, a manual overflow valve, a pilot-operated two-way cartridge valve, a main oil line pilot-operated reversing valve, a proportional pressure reducing valve, a leading oil line pilot-operated reversing valve, a manual directional valve, a tested load control valve, a loading pressure transmitter, an oil return pressure transmitter, a control pressure transmitter, a flowmeter, a power amplification device, a data acquisition card, a computer, a main phase step module and a pilot-operated phase step module. The testing system of the pilot-operated type load control valve can conduct comprehensive testing on the one-way connecting characteristic, the load pressure - flow characteristic, the control pressure - flow characteristic, the load pressure phase step characteristic and the control pressure phase step characteristic of the pilot-operated type load control valve.

Description

technical field [0001] The invention relates to a hydraulic valve test system, in particular to a test system for a pilot load control valve. Background technique [0002] In hydraulic system applications such as hoisting machinery, hydraulic winches and various construction machinery, it often occurs that the direction of the load force is consistent with the direction of the required load movement. This kind of load is called an overrunning load (negative load). A hydraulic system that is subjected to an excess load requires a special control valve to control the flow of hydraulic oil flowing from the load back to the oil source. This type of control valve is generally called a load control valve or a balance valve. [0003] However, since there is no clear national and industry standard for the test system of load control valves in my country at present, there are different test methods and systems among manufacturers and research institutions for the test of load control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B19/00
Inventor 谢海波刘建彬杨华勇
Owner ZHEJIANG UNIV
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