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Structural characteristics of three screw pump rotor based on thermo-solid coupling
Published:2021-10-21 author:CHEN Xiao-yi. Browse: 975 Check PDF documents
Structural characteristics of three screw pump rotor 
based on thermo-solid coupling


CHEN Xiao-yi

(College of Mechanical Engineering, Luzhou Vocational and Technical College, Luzhou 646000, China)


Abstract:  Aiming at the problem of the deformation of the screw rotor caused by the high temperature fluid generated in the operation of the three-screw pump, the deformation and stress of the screw rotor under different working conditions were studied. The temperature field of the screw pump was obtained by numerically solving the N-S equation based on the finite volume method. The accuracy of the flow field solution was ensured by comparing the simulation data with the experimental data. The CFD/CSD coupling solution technology was used to interpolate the temperature field value to the structural grid of the rotor. Taking the temperature field as the external load of the rotor thermal analysis, the static balance equation of the screw rotor structure was solved to obtain the displacement field and stress field of the rotor. Finally, the influence law of the temperature field generated by the screw pump on the deformation and stress of the screw rotor was analyzed. The research results show that the temperature at the outlet of the screw pump is higher, and the temperature at the inlet is lower. With the increase of outlet pressure, the maximum deformation and maximum stress of the masterslave screw rotor gradually increase. From the inlet to the outlet of the screw pump, the deformation of the driving and driven rotors gradually increases with the increase of axial length of the rotor.

Key words:  three screw pump; computational fluid dynamics/computational structural dynamics(CFD/CSD) coupling solution; turbulence model; N-S equation


CHEN Xiao-yi. Structural characteristics of three screw pump rotor based on thermosolid coupling[J].Journal of Mechanical & Electrical Engineering, 2021,38(8):1050-1057.


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