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Kong Xiaowu
Qiu Minxiu
Wei Jianhua
State Key Laboratory of Fluid Power Transmission and Control,
Zhejiang University,
Hangzhou 310027, China |
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EXPERIMENTAL
STUDY OF LOAD
SENSING SYSTEM WITH LONG
PIPES*
Abstract: A test platform is established as per the practical working condition of elevating platform fire truck. The influences of pipes and load on dynamic characteristics of load-sensing system are studied by series of step response experiments. Experimental results show that the feedback pipe makes the most important influence on the dynamic response speed of load-sensing system. Its internal diameter should be optimized for given length of pipe. On the other hand, the stability of load-sensing pump is improved as the length of input pipe increases in a certain range. The influence of input pipe on the dynamic response speed is caused mainly by the pressure-wave travel time in the input pipe.
Key words:
Long pipe Load-sensing Dynamic characteristics |