Steam turbine generator with stator multiloop reciprocating ventilation system

A technology of steam turbine generator and ventilation system, which is applied to cooling/ventilation devices, magnetic circuit shape/style/structure, electrical components, etc. The effect of fluid eddy current loss and temperature difference reduction

Active Publication Date: 2012-07-25
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this type of ventilation and cooling system is that the temperature distribution of the motor in the axial direction is uneven, and the temperature in the hot air zone is obviously higher than that in the cold air zone.

Method used

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  • Steam turbine generator with stator multiloop reciprocating ventilation system
  • Steam turbine generator with stator multiloop reciprocating ventilation system
  • Steam turbine generator with stator multiloop reciprocating ventilation system

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination figure 1 and figure 2 This embodiment is described. This embodiment includes a casing 1, a stator 2 and a rotor 3. There is a ventilation area between the inner surface of the casing 1 and the outer surface of the stator 2. The inner surface of the stator 2 is connected to the outer surface of the rotor 3. There is an air gap 4 between the circular surfaces,

[0018] The stator 2 is composed of multi-section stator cores 2-1 arranged at equal intervals. The multi-section stator cores 2-1 are arranged axially along the rotor 3, and a radial ventilation ditch 5 is formed between each adjacent two sections of stator cores 2-1.

[0019] The inner surface of each stator core 2-1 is provided with n stator teeth 2-11 along the circumferential direction, where n is an integer between 50-80,

[0020] It also includes 2n axial partitions 8, and each radial ventilation groove 5 is provided with 2n interdental radial pa...

specific Embodiment approach 2

[0026] Specific implementation mode two: the following combination figure 2 and image 3 This embodiment is described. This embodiment is a further limitation of Embodiment 1. The inter-tooth radial partition 9-1 is shorter than the radial partition 9-2 in the cold air zone. Other components and connections are the same as those in Embodiment 1.

[0027] In this embodiment, the length of the radial partition plate 9-2 in the cold air zone along the radial direction of the stator core 2-1 is longer than the length of the radial partition plate 9-1 between the teeth, so that the cold air section 2-12 can be formed. The airflow U-shaped passage that the hot air section 2-13 circulates.

specific Embodiment approach 3

[0028] Specific implementation mode three: the following combination figure 1 and image 3 Describe this embodiment, the difference between this embodiment and the second embodiment is that it also includes n rectangular cold air zone tangential partitions 11,

[0029] The end face of the air gap side of each cold wind zone radial partition 9-2 is fixedly connected to the symmetry line position of a cold wind zone tangential partition 11, and the cold wind zone tangential partition 11 is perpendicular to the cold wind zone radial partition connected thereto 9-2, the tangential partitions 11 of each cold air zone are clamped between two axially adjacent stator teeth 2-11, so that each cold air section 2-12 forms the adjacent hot air section 2-13 U-shaped groove air flow path. Other components and connections are the same as those in Embodiment 2.

[0030] In this embodiment, the tangential partition plate 11 in the cold wind area is used to partially block the U-shaped groov...

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Abstract

The invention relates to a steam turbine generator with a stator multiloop reciprocating ventilation system, belonging to the technical field of cooling of large air-cooled steam turbine generators. The invention solves the problem that the axial temperature distribution of the stator of the traditional large steam turbine generator is not uniform. According to the invention, an axial partition plate is used for dividing a ventilation region into a cold wind cavity and a hot wind cavity, and a toothspace radial partition plate is used for dividing a ventilating duct into stator cold wind areas and stator hot wind areas; each stator cold wind area is equally divided into two cold wind sections by one radial partition plate in the cold wind area along the peripheral direction, and each stator hot wind area is equally divided into two hot wind sections by one radial partition plate in the hot wind area along the peripheral direction; each cold wind section and adjacent hot wind sections form a U-slot airflow path, and all U-slot airflow paths form the stator multiloop reciprocating ventilation system. The stator multiloop reciprocating ventilation system is applicable to the cooling of the steam turbine generator.

Description

technical field [0001] The invention relates to a turbogenerator with a stator multi-circuit reciprocating ventilation system, belonging to the technical field of large-scale air-cooled turbogenerator cooling. Background technique [0002] With the increase of the capacity of large-scale turbo generators, the line current load of the motor increases accordingly, and the internal loss of the motor caused by the increase of the line current increases, which in turn causes the temperature rise of the motor to be too high, which seriously affects the safe and stable operation of the motor. The heating of the stator winding coils has become the main determinant factor limiting the capacity increase of the indirect gas-cooled turbogenerator. At present, the turbogenerator below 600MW mainly adopts the forced ventilation cooling method for indirect cooling, and the increase of the motor capacity requires the use of The most economical air volume can dissipate the heat generated ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K9/08H02K1/20
Inventor 李伟力罗应立焦晓霞张奕黄霍菲阳管春伟
Owner HARBIN UNIV OF SCI & TECH
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