The study of Involute of Base Circle of the Scroll Hydraulic Pump

The traditional scroll hydraulic pumps can produce suction fluid cavity, pressure fluid cavity and hydraulic discharge chamber when they are working. For the compressibility of the hydraulic is so small that the compression process always produce hydraulic impact phenomenon. The way to solve the hydraulic impact phenomenon is through opening pressure relief port, but this way has high requirement for the oil viscosity and the speed of the electrical machine. During working process, it can also emerge unsteady operate and instable output problems etc, which affect the property of the scroll hydraulic pumps seriously. This paper makes the further studies about the involute of base circle. We making the scroll profile only form suction hydraulic cavity and drainage hydraulic cavity in the meshing process, so that the conveying hydraulic of process does not produce hydraulic extruding phenomenon. Moreover, we calculate and analyze its characteristics of the volume, the result show that the scroll hydraulic pump of volume change has a linear relation in the process of movement. It can be seen that the scroll plate operates steadily, outputs stably, and has high reliability, thus improving the problems of the design and operating of the traditional scroll hydraulic pumps, and improving the working performance of the scroll hydraulic pumps.