Analysis On Capillary Of The Hydrostatic Spindle System And Design Optimization

With the development of high-speed, high-precision, high stiffness of spindle,traditional spindle can not meet the increasing demands of the mechanical parts’machining accuracy. Hydrostatic spindle is widely paid attention, especially in high-precision, high-efficiency and automation machine, more and more is widely used inindustry. At present, hydrostatic spindle is designed by experience, and it is given alarge number of simplifying assumptions in the Reynolds equation derivation involves.According to the N-S equations,analysis of the impact of structural parameters on thecharacteristics of hydrostatic spindle and optimized design is necessary.The fluid lubrication theory is based on the Navier-Stokes equations.Computational fluid dynamics(CFD) is used as the numerical methods, and hydrostaticspindle system compensated by a membrane type is analyzed.The relationshipsbetween capacity and the structural parameters are analyzed.Hydrostatic spindle system compensated by a membrane type is optimized,andbearing length, bearing clearance, initial gap between sill and membrane are designvariables.Stiffness,power loss temperature rise of oil are considered as performancemeasures. Optimal value is searched by iteration by VC++6.0, achieve the optimizeddesign of the bearing.According to the technical requirements of the piston lathe of major projects,baseon the theoretical analysis and optimal design,hydrostatic spindle system compensatedby a membrane type is designed based on modular and integrated ideology. Three-dimensional design by software Soliworks.