The stator and rotor contour designed by the traditional line pattern design method is not smooth at the joint of the cycloidal arc and the arc, where the stator rubber is continuously worn during operation, which will accelerate the damage of the rubber bushing and shorten the PDM service life. The stator and rotor design based on the rack gearing method not only can overcome the shortcomings of the traditional line pattern, but also can set more parameters to obtain more line patterns. In addition to the PDM stator and rotor line pattern, the line patterns could also be used in other screw hydraulic machines. The line pattern generation process of the PDM stator and its gearing rotor is discussed in detail by mathematical analysis method. The parametric equations of the stator and its conjugate rotor line pattern under different parameters are obtained. The basic parameters can be used to finely control the rotor line. The variation of the stator line pattern under different horizontal offsets is compared. The influence of horizontal offset on the line pattern is explained. The study results can provide references for screw-type hydraulic mechanical stator and rotor line design.
Design Theory of Stator and Rotor of PDM Based on Rack Gearing Principle Related Video:
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