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Full immersed type self circular loop of evaporative cooling stator of steam turbine generator

A turbo-generator, evaporative cooling technology, applied in cooling/ventilation devices, electrical components, electromechanical devices, etc., can solve the problem of not meeting the cooling technical requirements for the development of extra-large turbo-generator units, and the cooling requirements for large-capacity units. The problem of high electrical conductivity can achieve the effect of eliminating the water treatment system and hydrogen supply and storage equipment, low boiling point and good physical and chemical properties.

Inactive Publication Date: 2005-03-02
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: water is a medium with high conductivity, and hydrogen is an explosive gas medium
The above accidents occur especially frequently and seriously in water and hydrogen cooling units that have been running for a long time
Moreover, with the continuous increase of the unit capacity of generators, the above cooling methods can no longer meet the cooling requirements of large-capacity units.
[0004] Since water and hydrogen cooling medium are hidden dangers leading to major accidents, and cannot meet the cooling technical requirements for the development of super-large turbogenerator sets

Method used

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  • Full immersed type self circular loop of evaporative cooling stator of steam turbine generator
  • Full immersed type self circular loop of evaporative cooling stator of steam turbine generator
  • Full immersed type self circular loop of evaporative cooling stator of steam turbine generator

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Embodiment Construction

[0030] The content of the present invention will be further described in detail below in conjunction with the embodiments shown in the accompanying drawings.

[0031] see first figure 1 . The evaporative cooling circulation circuit of the present invention comprises a stator base 10 of a turbogenerator, an end cover 20, a condenser 30 installed on the top of the base, an isolation sleeve 40 connected to the end covers at both ends of the base, and a stator winding coil 50 (it is made up of many coils), stator core 60 (it is formed by lamination of many fan-shaped iron sheets), pressure ring 70 (one at each two ends of the stator core) and tooth pressure plates 80 at both ends of the stator core. The motor stator immersion evaporative cooling cycle is divided into three parts: (1) The cooling cycle sub-circuit 900 of the stator core slot ( image 3 ), which are arranged on both sides of the fixed insulation of the straight section of the two winding coils embedded in each slo...

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Abstract

The cooling circulation loop includes the cooling circulation sub-loop in the slot part of the stator core, the sub-loop between the sections of the iron core and the sub-loop between the pressing rings at the end parts of the stator core and the tooth pressure plates. The liquid cooling medium with high insulation and low boiling point of good physical and chemical properties is injected into the cavity of the stator. Each sub-loop is connected to the cavity of the stator. The cooling liquid absorbs the heat so as to be boiled and gasified, flowing in the circulation loop freely getting earth part of the stator cooled. The said cooling circulation loop possesses the advantages of the water, hydrogen and air-cooling and prevents the insulatiom damage and explosion caused by the leakage of water and hdyrogen.

Description

technical field [0001] The invention relates to a structure of a self-circulating evaporative cooling loop for cooling the stator iron core, winding coils and fixed parts of a steam turbine generator with a high-insulation, low-boiling-point non-flammable liquid medium. Background technique [0002] In the prior art, the commonly used cooling methods for the stator core, winding coils and fixed parts of the turbogenerator are gas (air, hydrogen) cooling and water cooling (abbreviated as water cooling), each of which has its own advantages and disadvantages. Because of its pervasiveness, the gas is more beneficial to the cooling of large-area scattered heat-generating parts, such as iron cores, etc., but it is easy to form local overheating areas for concentrated heat-generating parts such as winding coils and end structural parts, thus affecting the insulation life and safe operation of the motor. . Water cooling is the opposite of gas cooling. For large-area scattered heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K9/20
Inventor 顾国彪黄德书傅德平
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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