Aiming at the problem of screw sticking caused by fluid load generated in three screw pump's work.The influence of three screw pump tooth tip clearance and meshing clearance on screw deformation is analyzed.Based on N-S equation and k-ε turbulence model,the displacement and stress of three screw pump screw under the action of flow field are solved by fluid-solid coupling heat transfer method.The research results show that:With the increase of tooth tip clearance and tooth clearance,the maximum pressure and temperature in the screw pump gradually decrease.The deformation of the screw rotor is mainly concentrated in the inlet position,and the maximum deformation is 0.107 mm.The stress is mainly concentrated in the meshing position of the master-slave rotor,and the maximum stress is 146.82 MPa.The deformation and stress of the driving rotor are less than those of the driven rotor.The deformation and stress of rotor decrease with the increase of tooth tip clearance and meshing clearance.Therefore,under the condition of satisfying the compressor ratio and temperature rise of screw pump,the clearance should be increased as much as possible to improve the strength of screw rotor.
关键词
三螺杆泵/间隙/流固耦合/变形/应力
Key words
three screw pump/gap/fluid-solid coupling/deformation/stress
维普
万方数据