Method for installing generator rotor guard ring block type insulation barrel

Abstract

The invention relates to a generator rotor protective ring blocked type insulating cylinder structure, comprising a generator rotor insulating ring, a high strenghth epoxy glass cloth plate, a DDS plate compound four fluorine muslin delaine and an ebonite pin, which is characterized in that, when assembling the blocked type insulating cylinder, only the blocked type insulating cylinder is packaged on the rotor winding, the power plant is on-site exchanged without dismounting the coupling. The invention has advantages of high mechanical strength, good electric insulating performance, reliable operation while manufacturing, assembling or dismounting conveniently, can allow the coil freely telescopic and reduce the cost and the production cycle.

Description

technical field [0001] The invention relates to a method for installing a block-type insulating cylinder for a generator rotor guard ring, and belongs to the technical field of flue gas desulfurization, environmental protection and energy saving in thermal power plants. Background technique [0002] The insulation of the generator rotor guard ring mainly plays two roles in the operation of the generator, namely load bearing and electrical insulation. Our company introduced the technology of the American Westinghouse company for the insulation of the generator rotor guard ring. It is an integral insulating cylinder with a PTFE slip layer on the inner circle. It not only has a bearing capacity, heat resistance and electrical insulation that are superior to conventional materials. The middle guard ring insulation is not broken. What's more important is that the inner circle is smooth and the friction coefficient is very small. Therefore, during the operation of the generator, ...

AI Technical Summary

Problems solved by technology

[0004] The processing and manufacturing of the insulating cylinder is complicated. When the insulating cylinder is wound, it needs to be wound on the mold core. After it is shipped to our company, the outer circle and the seam still need to be processed on the mold core. Therefore, the mold core should be between the insulation cylinder manufacturer and our company. Back-and-forth transportation can easily cause production disconnection and affect the cycle

And the integral protective ring insulation tube is easy to be damaged when the protective ring is applied

[0005] In addition, when removing the retaining ring for on-site maintenance of the power plant, it is necessary to replace the integral retaining ring insulation cylinder, especially the steam end insulation cylinder. Due to the influence of the size of the steam end coupling, the retaining ring cannot be removed without dismantling the coupling. Pull out the rotor to replace the insulating cylinder, which brings great difficulties to maintenance

Images