"华龙一号"核主泵泵组转子轴向窜动量有限元分析OACSTPCD

In order to study the influence caused by factors such as self-weight,external load and ther-mal expansion of relevant components of RCP set on the axial displacement of rotor,a finite element model of certain type of shaft-sealed RCP set was established.A combination of numerical calculation and experimental verification was used to analyzed the axial displacement of the rotor of the RCP.The calculation and analysis results show that the thermal deformation between the motor stool and the shaft seal housing area is beneficial to the free compensation clearance of the mechanical seal of the RCP.However,the motor related components are subject to significant external load deformation and thermal deformation,and the total axial displacement after the combined deformation of rotor weight and bearing design clearance exceeds the design expectation,which will have a negative impact on the nor-mal operation of the RCP set.The hydraulic jacking test results of the motor rotor components are con-sistent with the numerical calculation results,which verifies the accuracy of the numerical calculation results.In order to reduce the axial displacement of the rotor of the RCP set,the clearance of the motor thrust bearing and the axial displacement of the rotor are adjusted and optimized by adding spacer gas-ket,and increasing the design height of some rotor parts.The adjusted and optimized RCP set is veri-fied through full flow experimental verification.The test results show that the axial displacement of the rotor of the RCP set after adjustment and optimization is about 2.2 mm,and the operating performance of the RCP set is stable which is in line with expectations.