Research On Virtual Prototype Of Spherical Vane Hydraulic Pump

With the implementation of the "Made in China 2025”strategy,the manufacturing industry has ushered in new opportunities and challenges.As an important part of the core technology of equipment manufacturing,hydraulic technology is widely used in various types of construction machinery.At present,the hydraulic pump on the precision heavy load equipment market generally is difficult to adapt to the market demands because of the pressure shock and oil trapping phenomenon,therefore,the research on low-noise and high-performance hydraulic pumps is of great significance for developing the new hydraulic pumps and promoting the hydraulic products into the high-end marketThe overall working performance of a spherical vane hydraulic pump with high pressure and large displacement was researched by using virtual prototyping technology in this paper.The variation rules of the inlet and outlet of each chamber were analyzed by establishing a three-dimensional model of the hydraulic pump,the structural parameters were optimized and adjusted to reduce the backflow and pressure shock based on the dynamic characteristics simulation model of the pump.And the strength and fatigue check of the key components were completed.The leakage flow field was simulated and analyzed,finally.The main contents were listed as follows:1.The three-dimensional model of the spherical vane hydraulic pump was established based on the Solidworks software.The variation rules of the inlet and outlet of each chamber during the working process of the spherical vane hydraulic pump were analyzed,and the calculation of the volume of each chamber and the corresponding flow area in different stages during the process of oil inlet and discharge were completed.The dynamic characteristics simulation model of the whole pump was built on the Matlab platform through coupling the flow and pressure of each cavity.2.The factors affecting the flow and pressure characteristics of the spherical vane hydraulic pump were analyzed based on the dynamic characteristics simulation model of the whole pump,and in order to further improve the performance of the pump,the optimization of the triangle damping groove structure was carried out by orthogonal test method to reduce the return flow and pressure shock.3.The force area changes of the vane and swash plate were calculated during the working processes,then combined with the pressure changes of the various chambers,the force changes of the drive shaft and the swash plate were obtained,finally the strength and fatigue of drive shaft and swash plate were checked with the ANSYS Workbench software.4.There are three kinds of leakage paths during the working process of the spherical vane hydraulic pump,including the leakage between the vane and the sealing strip,the leakage between the vane side and the oil cone surface and the leakage between the top of the vane and the inner surface of the inclined cone.Each leakage path was analyzed through the gap flow theory;the flow field of each leaked part was simulated by FLUENT software,the distribution of pressure field and velocity field in the leaked area was output.The leakage flow between the vane and the sealing strip is the largest in the three paths.The effect of leakage flow on the dynamic characteristics of pump outlet flow and outlet pressure was also investigated.