Motor insulation structure under cryogenic working condition

Abstract

The invention discloses a motor insulation structure under a cryogenic working condition. The motor insulation structure includes an end part binding material, winding at a joint position, motor winding wires, interphase insulation, packing, sleeves, a high-resistance tape, a low-resistance tape, impregnating varnish, slot insulation, interlayer insulation and a slot wedge. Through modification treatment of a traditional insulation material, the material has better tenacity and dielectric strength under a cryogenic condition, thereby effectively avoiding occurrence of an embrittlement phenomenon of the material under a cryogenic working condition, prolonging the service life of a cryogenic motor, correspondingly reducing material cost and time cost of a user for maintenance of a motor, and enabling the performance of the motor adopting the abovementioned material to be more stable. If an insulation material that is not suitable for the cryogenic working condition is selected and used, since the dielectric strength reduces after embrittlement of the material under a cryogenic state, a phenomenon of insulation breakdown under a rated voltage is likely to occur. The motor insulation structure provided by the invention provides convenience for designers of cryogenic motors, shortens the development cycle of the cryogenic motors, and reduces the development cost of the cryogenic motors.

Description

technical field [0001] The invention relates to the field of electromechanical technology, in particular to a motor insulation structure under cryogenic working conditions. Background technique [0002] At present, the demand for green and clean energy is increasing, and liquefied natural gas (LNG has a boiling point of -162°C at 1 standard atmospheric pressure), as a typical green energy, has an increasing demand. Correspondingly, its transportation volume is also increasing, which drives the demand for cryogenic submersible pumps to increase. As a key component of cryogenic submersible pumps, cryogenic motors still mainly rely on imports and are expensive. Therefore, the demand for domestic cryogenic motors is getting higher and higher. One of the main factors restricting the development of domestic cryogenic submersible motors is that there is no insulating material developed for cryogenic conditions (below -100°C) in China. At present, although there are many types of ...

AI Technical Summary

Problems solved by technology

At present, although there are many types of insulating materials, the lower limit of temperature resistance is mostly developed at -40°C, which leads to the phenomenon of cracking of existing insulating materials under cryogenic conditions, which increases the risk of electrical insulation breakdown, and the motor The service life is greatly reduced

The cryogenic motor is installed in the cryogenic pump, and its special environment and structure make the maintenance and replacement of the motor extremely inconvenient.

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