Asymmetric Characteristics and Modification Optimization of Heavy-Duty Rack and Pinion
In order to solve the problem of partial load damage on the tooth surface of the pinion and pinion in the pumping unit under heavy load conditions,the partial load characteristics and training optimization of the pinion and pinion were studied.Firstly,according to the Ishikawa method combined with the slice meth-od,the deformation and recontact degree of pinion and rack under load were calculated.Secondly,the theo-retical formula for calculating the deflection of pinion and rack under load was analyzed,so as to determine the modification amount.Finally,the influence of different modification schemes on the offset load of low-speed and heavy-load racks is analyzed.The applicability of the modification theory in pinion and rack is verified.The off-load deformation formula of rack and pinion is derived and the influence of off-load de-formation on the contact stress of rack and pinion is analyzed.The results show that,under the action of bi-ased load,the recontact degree decreases gradually along the tooth direction,the load increases continuous-ly,and the deformation increases gradually.The deformation of single tooth meshing area is about twice that of double tooth meshing.