Extension transition disc induced draft fan electric insulation coupling

Abstract

The invention discloses an extension transition disc induced draft fan electric insulation coupling. The extension transition disc induced draft fan electric insulation coupling comprises a semi-coupling, an outer extension transition disc, a diaphragm set, a connecting disc, and an induced draft fan diaphragm coupling middle shaft, wherein the semi-coupling is a motor side semi-coupling, the semi-coupling is connected with the outer extension transition disc through a transition disc connecting bolt, the outer extension transition disc is designed to extend towards the motor side semi-coupling, an insulating plate and an insulating sleeve are arranged between the outer extension transition disc and the semi-coupling, the outer extension transition disc is connected with the connecting disc through a driving bolt, the elastic diaphragm set is arranged between the outer extending transition disc and the connecting disc, and the connecting disc is fixedly connected with the induced draftfan diaphragm coupling middle shaft. According to the extension transition disc induced draft fan electric insulation coupling, two ends of a motor are both loaded with shaft current, only the motorside semi-coupling needs to be changed, and a relatively simple scheme with relatively low cost is provided for an existing induced draft fan to be changed into a steam and electric double-drive insulating coupling.

Description

technical field [0001] The invention relates to the field of high-efficiency clean coal power generation technology and energy-saving technology, in particular to an electrically insulated shaft coupling for a transition plate induced draft fan. Background technique [0002] The induced draft fan in a thermal power plant consumes a lot of power. At the same time, when the thermal power plant extracts steam for heating, due to the mismatch of steam pressure and steam temperature, there is usually a link of temperature reduction and pressure reduction, resulting in a large energy consumption. Recently, the application of steam-electric dual-drive induced draft fans in high-efficiency thermal power plants has achieved great success. This technology can better coordinate the contradiction between heat supply and power generation, greatly reducing the power consumption of induced draft fan plants and reducing steam extraction. Energy loss caused by heat supply, temperature reduct...

AI Technical Summary

Problems solved by technology

[0003] The steam-electric dual-drive induced draft fan is connected with rotating equipment at both ends of the motor, and the moving and static parts of these equipment have not been insulated, and the shaft voltage of the motor shaft is inevitable, so it is connected to the equipment at both ends of the motor. It is easy to form a shaft current through the large shaft of the motor, resulting in electrical corrosion of the reducer connected to the motor, the steam turbine bearing, and the bearing box of the induced draft fan, resulting in equipment damage

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