CN112627914A - Composite cooling device for enhancing heat dissipation effect of turbonator - Google Patents
Composite cooling device for enhancing heat dissipation effect of turbonator Download PDFInfo
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- CN112627914A CN112627914A CN202011554427.8A CN202011554427A CN112627914A CN 112627914 A CN112627914 A CN 112627914A CN 202011554427 A CN202011554427 A CN 202011554427A CN 112627914 A CN112627914 A CN 112627914A
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- Prior art keywords
- layer
- cooling
- heat dissipation
- steam turbine
- dissipation effect
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/14—Casings modified therefor
Abstract
The invention discloses a composite cooling device for enhancing the heat dissipation effect of a steam turbine generator, which comprises a shell, a cooling pipeline, a cooling pump, a cooling pool and an insulating material on a stator winding. The casing is built outside turbo generator, covers turbo generator's stator core, leaves the gap between casing and the turbo generator, and the casing adopts bilayer structure, and the skin is the sealing layer, uses the steel that mechanical strength is big, and the inlayer is the porous medium material layer, uses artificial porous medium material, is connected through cooling tube between casing and cooling pump, the cooling tank, defines the insulating material on the winding and adopts the stronger novel insulating material of radiating effect. The casing of the turbonator adopts a porous medium, and liquid metal is filled in the casing, so that the cooling effect of the turbonator is enhanced. The insulating material of the stator winding is improved from the aspects of material type and structure so as to reduce the highest temperature of the stator winding.
Description
Technical Field
The invention relates to the technical field of motors, designs a composite cooling device for enhancing the heat dissipation effect of a turbonator, and is suitable for a cooling system of the turbonator.
Background
With the development of science and technology, the capacity of a large-scale steam turbine generator is continuously increased, the line current load of the steam turbine generator in the operation process is also increased, the heat loss of the motor is increased rapidly, the temperature rise of the steam turbine generator is further increased, and the stable operation of the generator is seriously influenced.
Conventional cooling methods for large steam turbine generators include air cooling, internal water cooling, and hydrogen cooling. The air cooling method is generally only suitable for small turbo-generators. The water internal cooling method is generally double water internal cooling, i.e. the conductors of the stator winding and the rotor excitation winding are hollow, cooling water is introduced into the conductors, the stator chamber is still cooled by air, and although the cooling efficiency is high, the inside of the conductors is easy to scale and block. The cooling effect of the hydrogen cooling method is better than that of air, but because hydrogen is flammable and explosive gas, a complex oil sealing system needs to be additionally arranged for preventing hydrogen leakage, and the safety performance is not strong.
The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator, which is designed by the invention, brings the casing of the steam turbine generator into the cooling system for the first time, improves the insulating material of the stator winding, enhances the cooling effect of the steam turbine generator, and can effectively reduce the highest operating temperature of the steam turbine generator.
The prior art is only improved on an air cooling air channel or a stator winding waterway channel. For example, a steam turbine generator with an axial-radial cooling system proposed by the university of harbin lifer (see patent publication No. CN 102064635B), and a cooling air path device designed by the limited company of the Shandong Qilu motor manufacturers and adapted to an air-cooled steam turbine generator (see patent publication No. CN 106329829B). Aiming at the defects of the existing patent, the invention designs the composite cooling device for enhancing the heat dissipation effect of the steam turbine generator, the shell of the steam turbine generator is brought into a cooling system, the cooling effect is improved, and in order to reduce the highest temperature of the stator winding, the insulation material on the outer surface of the stator winding is also improved, so the invention has practical significance.
Disclosure of Invention
The invention designs a composite cooling device for enhancing the heat dissipation effect of a turbonator, aims to enhance the heat dissipation effect of the turbonator and reduce the highest operating temperature of the turbonator, and is suitable for medium and large turbonators.
The invention adopts the following technical scheme:
a composite cooling device for enhancing the heat dissipation effect of a steam turbine generator comprises a shell, a cooling pipeline, a cooling pump, a cooling pool and insulating materials on a stator winding. The casing is built outside turbo generator, covers turbo generator's stator core, leaves the gap between casing and the turbo generator, and the casing adopts bilayer structure, and the skin is the sealing layer, uses the steel that mechanical strength is big, and the inlayer is the porous medium material layer, uses artificial porous medium material, is connected through cooling tube between casing and cooling pump, the cooling tank, defines the insulating material on the winding and adopts the stronger novel insulating material of radiating effect.
The porous medium material adopts foamed copper or sintered ceramic with the through hole rate as high as 98 percent and is used for providing a flow channel of a coolant, and the coolant adopts one of liquid metal mercury, gallium, rubidium, cesium and gallium-based alloy.
The heat exchange area of the porous medium material layer is increased, the heat dissipation effect can be enhanced, and the diameter of the holes in the porous medium material layer is larger than or equal to 1 mm and smaller than or equal to 3 mm.
The thickness of the sealing layer is 1 cm, and the thickness of the porous medium material layer is 2 cm.
The connection mode between the sealing layer and the porous medium material layer is welding or bonding.
The novel insulating material on the stator winding adopts a three-layer structure, the upper layer and the lower layer adopt insulating high-temperature-resistant mica materials, and the middle layer adopts carbon fiber resin matrix composite materials with strong heat conductivity and a small amount of copper wires.
The upper layer, the middle layer and the lower layer of the insulating material are connected in an adhesion mode.
The upper layer and the lower layer of the insulating material are formed by flatly paving insulating high-temperature-resistant mica materials, and the middle layer is made of carbon fiber resin base by a 3D weaving technology.
A small amount of copper wires in the insulating material middle layer can enhance the heat conductivity of the insulating material middle layer, and meanwhile, the micro-influence of a small amount of eddy generated by the copper wires on the steam turbine generator can be ignored.
Compared with the prior art, the invention has the beneficial effects that: the novel casing structure is adopted, the casing is incorporated into a cooling system of the steam turbine generator, the porous medium material layer is adopted to increase the heat exchange area, and the heat dissipation effect is enhanced. The insulating material of the stator winding is improved, the ventilation and convection heat exchange capability of the stator winding is enhanced, and the stator winding has the outstanding advantages of simple system, short installation period, convenience in starting and stopping, economical operation, high reliability and convenience in maintenance and overhaul, and has wide development prospect.
Drawings
FIG. 1 is a schematic view of a housing structure
FIG. 2 is a front view of a casing of a computer
FIG. 3 is a schematic view of a cooling device for a casing
FIG. 4 is a schematic view of the structure of the stator winding insulation material
Detailed Description
The invention discloses a composite cooling device for enhancing the heat dissipation effect of a steam turbine generator, which comprises a novel shell, a liquid inlet, a liquid outlet, a cooling pipeline, a cooling pool, a cooling pump and a novel insulating material beneficial to the heat dissipation of a stator winding.
The specific implementation steps are as follows:
(1) the type of the porous medium material of the novel shell of the steam turbine generator is related to specific design parameters.
(2) The type and flow rate of the liquid metal are related to specific design parameters.
(3) And filling liquid metal in the pore channels of the porous medium material layer of the shell.
(4) When the turbonator operates, the liquid metal with lower temperature enters the porous medium material from the liquid inlet by the power provided by the cooling pump and flows in the holes, the liquid metal with lower temperature in the porous medium material layer takes away heat in the shell through heat conduction to cool the turbonator, the liquid metal with higher temperature flows out of the liquid outlet and enters the cooling pipeline, and the liquid metal enters the porous medium material layer of the shell again after being cooled in the cooling pool to be subjected to circulating cooling.
(5) Along with the gradual rise of the temperature of the running stator winding of the steam turbine generator, the insulating material of the stator winding absorbs the heat of the stator winding and carries the heat away from the stator winding to cool the stator winding through the heat conduction with the air in the shell.
The porous medium material in the step (1) is one of foamed copper or sintered ceramic with the through hole rate of 98%.
In particular, the diameter of the holes in the porous medium material in the step (1) is greater than or equal to 1 mm, and
less than or equal to 3 mm.
The liquid metal in the step (2) can adopt: mercury, gallium, rubidium, cesium, and gallium-based alloys.
And (3) the insulating material of the rotor winding in the step (5) adopts a three-layer structure, the inner layer and the outer layer adopt insulating high-temperature-resistant mica materials, and the middle adopts a carbon fiber resin-based composite material with strong heat-conducting property.
Specific embodiments are described below with reference to fig. 1 to 4. The invention relates to a composite cooling device for enhancing the heat dissipation effect of a steam turbine generator. As shown in fig. 1, wherein (1) is the outer surface of the casing, (2) is the sealing layer of the casing, (3) is the porous medium material layer of the casing, the connection mode between the sealing layer and the porous medium material layer is welding or bonding, and (4) is the hole in the porous medium material layer for providing the flow passage of the cooling liquid. As shown in fig. 2, wherein (5) is a liquid inlet, and (6) is a liquid outlet of the housing, the porous medium material layer is made of foam copper with a through-hole rate as high as 98%, the coolant is liquid metal gallium, the liquid inlet is at the lower part of the housing, and the liquid outlet is at the upper part of the housing, which is beneficial for the coolant to fully absorb heat in the housing. As shown in fig. 3, (7) is a cooling pump, and (8) is a cooling tank, wherein the cooling pump, the cooling tank, the liquid inlet and the liquid outlet are connected by a cooling pipeline, and the cooling liquid flows by the power provided by the cooling pump. Fig. 4 is a schematic structural diagram of the stator winding insulation material, the insulation material has a three-layer structure, (9) is an insulation high-temperature-resistant mica material, and (10) is a carbon fiber resin-based composite material with strong heat conductivity. The upper layer and the lower layer of the stator insulation winding are formed by tiling insulating high-temperature-resistant mica materials, the middle layer is made of carbon fiber resin-based composite materials with strong heat conductivity by adopting a 3D weaving technology, and the middle layer contains a small amount of copper wires to enhance the heat conductivity of the middle layer.
When the cooling device operates, the casing can absorb the heat of the steam turbine generator and the temperature rises, at the moment, the liquid metal with lower temperature flows in the cooling pipeline through the power provided by the cooling pump 7 and enters the porous medium material layer of the casing from the liquid inlet 5 at the lower end of the casing, the liquid metal absorbs the heat of the casing through heat conduction to cool the steam turbine generator, and the liquid metal with higher temperature flows out from the liquid outlet 6 at the upper end of the casing and enters the casing from the liquid inlet 5 again for circulating cooling after being cooled by the cooling pool 8. The porous medium material layer 3 can greatly increase the heat exchange area of the liquid metal, so that the heat dissipation effect of the steam turbine generator is enhanced.
When the steam turbine generator operates, the rotor rotates to drive the centrifugal fan on the rotor to blow cold air into the shell, the cold air with lower temperature passes through the air channel of the steam turbine generator, heat on the stator winding is taken away through heat convection with the outer surface of the insulating layer of the stator winding, and the stator winding is cooled. The novel insulating material can effectively improve the efficiency of heat convection, thereby enhancing the cooling effect of the stator winding.
Claims (9)
1. A composite cooling device for enhancing the heat dissipation effect of a steam turbine generator is characterized in that the cooling device comprises a shell, a cooling pipeline, a cooling pump, a cooling pool and an insulating material on a stator winding. The casing is built outside turbo generator, covers turbo generator's stator core, leaves the gap between casing and the turbo generator, and the casing adopts bilayer structure, and the skin is the sealing layer, uses the steel that mechanical strength is big, and the inlayer is the porous medium material layer, uses artificial porous medium material, is connected through cooling tube between casing and cooling pump, the cooling tank, defines the insulating material on the winding and adopts the stronger novel insulating material of radiating effect.
2. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: the porous medium material adopts foamed copper or sintered ceramic with the through hole rate as high as 98 percent and is used for providing a flow channel of a coolant, and the coolant adopts one of liquid metal mercury, gallium, rubidium, cesium and gallium-based alloy.
3. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: the heat exchange area of the porous medium material layer is increased, the heat dissipation effect can be enhanced, and the diameter of the holes in the porous medium material layer is larger than or equal to 1 mm and smaller than or equal to 3 mm.
4. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: the thickness of the sealing layer is 1 cm, and the thickness of the porous medium material layer is 2 cm.
5. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: the connection mode between the sealing layer and the porous medium material layer is welding or bonding.
6. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: the novel insulating material on the stator winding adopts a three-layer structure, the upper layer and the lower layer adopt insulating high-temperature-resistant mica materials, and the middle layer adopts carbon fiber resin matrix composite materials with strong heat conductivity and a small amount of copper wires.
7. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: the upper layer, the middle layer and the lower layer of the insulating material are connected in an adhesion mode.
8. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: the upper layer and the lower layer of the insulating material are formed by flatly paving insulating high-temperature-resistant mica materials, and the middle layer is made of carbon fiber resin base by a 3D weaving technology.
9. The composite cooling device for enhancing the heat dissipation effect of the steam turbine generator as claimed in claim 1, wherein: a small amount of copper wires in the insulating material middle layer can enhance the heat conductivity of the insulating material middle layer, and meanwhile, the micro-influence of a small amount of eddy generated by the copper wires on the steam turbine generator can be ignored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011554427.8A CN112627914A (en) | 2020-12-24 | 2020-12-24 | Composite cooling device for enhancing heat dissipation effect of turbonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011554427.8A CN112627914A (en) | 2020-12-24 | 2020-12-24 | Composite cooling device for enhancing heat dissipation effect of turbonator |
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| CN112627914A true CN112627914A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011554427.8A Pending CN112627914A (en) | 2020-12-24 | 2020-12-24 | Composite cooling device for enhancing heat dissipation effect of turbonator |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5053658A (en) * | 1989-07-08 | 1991-10-01 | Robert Bosch Gmbh | Electrical machine, such as rotary current generator, having improved cooling |
| CN102445038A (en) * | 2011-08-10 | 2012-05-09 | 郑周华 | Circulating water feeding system of cooling device of hydropower generation set |
| CN103188912A (en) * | 2011-12-27 | 2013-07-03 | 刘源 | Lotus-type regular porous metal microchannel heat sink using liquid metal working medium |
| CN206775904U (en) * | 2017-05-04 | 2017-12-19 | 郑州大学 | It is a kind of using composite phase-change material and the thermal controls apparatus of liquid metal heat radiation |
| CN207910594U (en) * | 2017-12-04 | 2018-09-25 | 威海人合机电股份有限公司 | A kind of water-cooled generator |
| CN109454970A (en) * | 2018-11-08 | 2019-03-12 | 哈尔滨电机厂有限责任公司 | A kind of manufacturing method of the more glue epoxy fibreglass mica paper tapes of high thermal conductivity |
| CN111668994A (en) * | 2020-06-22 | 2020-09-15 | 珠海格力电器股份有限公司 | Liquid cooling motor and flow control method |
-
2020
- 2020-12-24 CN CN202011554427.8A patent/CN112627914A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5053658A (en) * | 1989-07-08 | 1991-10-01 | Robert Bosch Gmbh | Electrical machine, such as rotary current generator, having improved cooling |
| CN102445038A (en) * | 2011-08-10 | 2012-05-09 | 郑周华 | Circulating water feeding system of cooling device of hydropower generation set |
| CN103188912A (en) * | 2011-12-27 | 2013-07-03 | 刘源 | Lotus-type regular porous metal microchannel heat sink using liquid metal working medium |
| CN206775904U (en) * | 2017-05-04 | 2017-12-19 | 郑州大学 | It is a kind of using composite phase-change material and the thermal controls apparatus of liquid metal heat radiation |
| CN207910594U (en) * | 2017-12-04 | 2018-09-25 | 威海人合机电股份有限公司 | A kind of water-cooled generator |
| CN109454970A (en) * | 2018-11-08 | 2019-03-12 | 哈尔滨电机厂有限责任公司 | A kind of manufacturing method of the more glue epoxy fibreglass mica paper tapes of high thermal conductivity |
| CN111668994A (en) * | 2020-06-22 | 2020-09-15 | 珠海格力电器股份有限公司 | Liquid cooling motor and flow control method |
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