Rapid steam turbine coupling bolt disassembling tool and using method

Abstract

The invention relates to a rapid steam turbine coupling bolt disassembling tool which comprises an ejection mechanism and a cooling mechanism, the ejection mechanism is arranged between a coupling and a steam turbine, and the ejection mechanism is in contact with one end of a pin shaft bolt of the coupling; and the cooling device is in contact with the other end of the pin shaft bolt. The invention further relates to a using method of the rapid steam turbine coupling bolt disassembling tool, ultralow-temperature liquid nitrogen is rapidly injected into the pin shaft bolt through the adapter, heat is rapidly absorbed through gasification of the liquid nitrogen, the pin shaft bolt is rapidly cooled to subzero temperature, the volume of the pin shaft bolt is shrunk at the low temperature, the fit clearance between the pin shaft bolt and the through hole of the coupling is increased, and the ejector rod of the efficient long-stroke oil jack is driven by the manual hydraulic pump to extend out to eject out the pin shaft bolt. The unit maintenance quality is effectively improved, the labor intensity of maintenance workers is greatly relieved, the unit maintenance period is guaranteed, and the operation safety of constructors is guaranteed.

Description

technical field [0001] The invention relates to a dismantling tool, more specifically, it relates to a fast steam turbine anti-wheel bolt dismantling tool and its use method. Background technique [0002] The main function of the steam turbine coupling is to connect the steam turbine and the generator rotor through the rigid connection of the coupling, and transmit the rotational force of the steam turbine rotor to the generator to realize energy conversion. At the same time, the axial thrust between the rotors is transmitted through the rigid coupling. To the thrust pad, it is used to ensure the axial safety clearance during the operation of the steam turbine generator set. [0003] Rigid couplings for steam turbines have the advantages of large torque transmission, large shearing force and simple structure, but the disadvantages are small center deviation, strict maintenance process requirements, high assembly accuracy, heavy connection and adjustment procedures, dismantli...

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Problems solved by technology

[0004] However, the sledgehammer vibration method has the following problems: 1. There are many precision thermal control measurement probes installed between the high-medium pressure coupling bearing boxes of the unit. It is necessary to remove all thermal control probes and brackets before dismantling the high-middle wheel. It takes about 1 day to complete the pre-repair data check and dismantling of all probes for the thermal control precision probe. The overhaul period brings certain obstacles; 2. The space between the high-medium pressure pairing wheel equipment is relatively small. When dismantling the pairing wheel bolts by vibrating method, it not only requires high skill of the construction personnel, but also needs to use rubber pads or cardboard in advance The high-medium pressure part of the steam turbine journal, thrust disc, expansion disc, axial displacement device, etc. are fully wrapped and protected to avoid damage to the precise parts of the rotor caused by the sledgehammer during construction; 3. Necessary when disassembling the pin bolts Copper rods are used as power transmission transition tools. Because the pin bolts are arranged along the outer circumference of the coupling, the copper rods have no reliable and stable support points for fixing. During the whole process of disassembling the pin bolts, manual hands are required to hold the copper rods firmly. tapping job

Make maintenance work time-consuming and laborious

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