1 pressure distribution analysis
Three screw together with the pump casing, pump body together to form the three most of the cavity.he pressure distribution is from the ideal state, the oil inlet cavity and the sealing circuit
The pressure is the same and the discharge chamber is the same as the load. however
Due to the existence of a certain gap between the pump sleeve and the screw, the high pressure side of the media
Leakage into the low pressure cavity along the gap, so that the middle seal circuit
Oil pressure change. Study, from the oil inlet to the oil discharge end, three screw
The change of medium pressure in the cavity of rod pump
2 of the three screw pump rod mainly by meshing with each other to form a seal cavity from the liquid from the outlet (omitted). Therefore, the correct design of screw type screw pump is to ensure that the main factors of work efficiency. Based on the 3D CAD software SolidWorks, designed the type three screw pump, the main (omitted) parameter design system convenient for the engineering technical personnel design under different parameters, from the main rod and bushing. Therefore, the parametric design system has a strong practical value in engineering. Based on SolidWorks software of spline curve in implementation technique, were extracted from the main, bar section and longitudinal section on line data compared with the theoretical data, obtained from the Lord, (omitted) surface line and extraction method (longitudinal) the maximum error between the polar section line. Because the calculation results show that the two error is very small, can be directly through the main rod, from the three dimensional model Gets the type master-slave pole method, longitudinal (omitted) processed into model test. This method also gets complicated some unknown expression of surface model provides reference. Screw work, mutual engagement of the screw in the main, from the Bush in high speed rotation. When the bushing in the medium under pressure, deformation the amount reaches a certain degree, the wear between the Bush and the screw will accelerate the screw type surface is damaged, leakage, reduce the volume, deformation of Yan (omitted) now screw 'death' phenomenon. In order to solve this problem, this paper uses the finite element analysis software MSC.Nastran on the mechanical properties of the actual working conditions under the liner the.
3. Finite element analysis of 3 screw
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