Electro-Hydraulic Proportional Characteristics Research Of Flow About Variable Pump In Deep-Sea Environment

With the deficilent of land resources and marine exploration technology development, at present, mankind has found that resources in dee-sea that can use for a long time, but the development of deep-sea machinery is relatively backward.because the deep sea environment requires the mechanical machine has the resistance with low failure rate, temperature and corrosion resistant properties. Hydraulic source as an important deep-sea mechanical power source equipment, the performance of it will determine the mechanical performance, and flow as an important source of output power, which will directly determine the working device (such as hydraulic cylinders, hydraulic motors) and velocity characteristics, therefore, we must study how the system parameters and the deep sea environment effect system performance of the flow.This rearch points the following sections:(1) Introduce hydraulic oil density,viscosity and other properties.obtain the formula of the density,viscosity,effective volume modulus of elasticity in this paper,combined with previous academic research results;(2) Establish the deep-sea simulation model of the power source with the laws of physics(conservation of momentum,Newton's second law,etc).ansys the output signal of flow by modifying the parameters(electro-hydraulic proportional valve spool quality,the quality of control plunger,Kp of the PID controller,etc),as the future development of more advanced system of deep-sea power sourc reference;(3) In the deep-sea environment,the system is not directly observed,therefore,in this paper develop a deep-sea environment monitoring system,which use Labview as the software and use the card PCI8622 as the acquisition front-equipment capture.this monitoring system use the software modules based on high-level language design.the monitoring and analysis program can use for signal monitoring and collection,also can ansys the flow-pressure curve and amplitude frequency,phase-frequency characteristics;(4) Design the deep-sea hydraulic power source system in the funding of 863 projects,and use land-based simulation approach to test the power source system.this article will introduce the experimental methods,experimental conditions,experimental equipments and experimental results.through high-pressure simulation experiment,ansys the output signal of flow characteristics with the deep-sea environments and input voltage of the system,as referenc of developing deep-sea controller and variable pump.