Under the operating load, the fabrication hydraulic torque converter could be regarded as a rotating pressure vessel. It will dilate like a balloon as a result of the centrifugal force and fluid pressure. The magnitude of deformation affects the performance of fabrication hydraulic torque converter and its connection with adjacent parts. Based on the three dimensional measuring machine and platform UG and Gambit, the frame model of ballooning deformation is established and simplified. Based on modern computational fluid dynamics theory, the simulation software FLUENT, MSC.Partran and MSC.Nastran are employed to make simulation prediction for the ballooning deformation. The results of the simulation are checked out through the experiments. The experimental results show that the calculation and experiment results are coherent. The increase of axial displacement has a linear relation with the rise of fluid pressure. The largest stress occurs near the intersect of the shell and working face. The largest strain takes place at the outlet of the pump and inlet of the turbine.

In the paper, the housing of a specific type of sheet-metal type hydraulic torque converter is modeled and simplified by means of three coordinate measuring instrument and UG software. Moreover, the housing fatigue life is simulated and predicted by FLUENT and MSC software platform according to the three-dimensional flow theory. Further tests are launched to research and analyze the fatigue life and testify the simulation. It is proved that the simulation result basically complies with the experiment result. Upon less than 100,000 pressure circulations, the dilatation undergoes linear variations. In this phase, the housing suffers from elastic deformation. When the number of pressure circulation exceeds 100,000, the housing undergoes plastic deformation. Besides, the part of impeller and turbo housing with the largest curvature discontinuity, and the connection between the center and the bearing bushing shall bear a short service life.