Coupling alignment scheme for rabbet-matched single-fulcrum shafting steam turbines

Abstract

The invention discloses a coupling alignment scheme for rabbet-matched single-fulcrum shafting steam turbines. The scheme comprises the steps of matching up the rabbets of the couplings of two single-fulcrum shafting steam turbines by a temporary connecting piece; reserving a gap between the end surfaces of the couplings of the two single-fulcrum shafting steam turbines for measuring the deviation of the end surfaces; loosening the temporary connecting piece to confirm the circular center of the coupling of each single-fulcrum shafting steam turbine; adjusting the positions of two rotors connected with the couplings of the two single-fulcrum shafting steam turbines to measure the gap between the end surfaces of the couplings of the two single-fulcrum shafting steam turbines; judging whether a mouth-gaping value meets the design requirement or not through comparing and analyzing the gap value between the end surfaces; on the condition that the mouth-gaping value does not meet the design requirement, conducting the adjustment. According to the technical scheme of the invention, through matching up the rabbets of the couplings of the two single-fulcrum shafting steam turbines, the two single-fulcrum shafting steam turbines can be aligned with each other and the circumferential deviation is eliminated directly. The operation is simple and the circumferential deviation of the couplings of each single-fulcrum shafting steam turbine is free from being measured and adjusted. The alignment state is consistent with the running state of a rotor shaft system.

Description

Technical field [0001] The invention relates to a aligning scheme of a stop cooperating with a single fulcrum shafting steam turbine coupling. Background technique [0002] With the development of high-parameter and large-capacity steam turbines, the shafting of steam turbines has gradually lengthened. Single-fulcrum shafting is the best way to reduce the length of the shafting. The search in the shafting directly determines the vibration and safe operation of the steam turbine. Fundamental guarantee. The misalignment of the coupling center will bring about the following two effects: (1) It causes the overload of individual supporting bearings, the wear of the bearing tungsten gold, and the increase of the lubricating oil temperature; the misalignment of the coupling center may cause the opening value of the coupling end face to exceed the standard Or the coupling circumference difference exceeds the standard, whichever exceeds the standard, it will affect the uniform distributi...

AI Technical Summary

Problems solved by technology

[0004] Using the traditional alignment process, the added false tiles have a certain contact with the rotor, and the machining accuracy of the contact surface is very high; the entire shafting is in the state of a single fulcrum during normal operation, and the rotor support mode and operating state after adding the false tiles The fulcrums are different; and the stability of the false tile is also the key to the alignment of the shaft during the alignment process

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