| During the operation of the gas turbine, with the influence of bending deformation, combination rotor produces eccentric alternating loads, which caused the bolt thread side slip, reduce the reliability performance of the combined rotor. In this paper, take the rod bolts as research object, studies the rod bolts threaded side slip. The main contents are as follows:Firstly, the influence of bending deformation of heavy-duty gas turbine rotor on the axial eccentric load of rod bolts, and find variation of the load with the rotation of the rotor were analyzed.Secondly, based on the theory of elasticity, the distribution of thread load were analyzed to derive the distribution law of the thread load under the bending moment, then analytical expressions of rod bolts under eccentric loads were obtained, and tested it with numerical simulation.Then, analyzed the coupling of bolts in the influence of the axial alternating loads, established the equation between rod bolt load variation and its slippage. Based on this, considering the impact of eccentric load factor, established of an eccentric alternating loads, the relationship between the rod whorl eccentric load and the slippage of the vice whorl in the influence of Eccentric alternating load, threaded rod and revealed the slip shift process of deputy rod bolt threads in the influence of eccentric alternating loads.Finally, through threaded rod slip experiments on the bolted comprehensive experimental bench, measured the relationship between the load change of deputy thread in the influence of alternating loads and the relative slippage. The test results are compared with theoretical calculations to verify the correctness of the model in this article. |
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