CN202707609U - Internal-circulation cooling axial-flow impeller for gas turbine generator - Google Patents
Internal-circulation cooling axial-flow impeller for gas turbine generator Download PDFInfo
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- CN202707609U CN202707609U CN 201220386400 CN201220386400U CN202707609U CN 202707609 U CN202707609 U CN 202707609U CN 201220386400 CN201220386400 CN 201220386400 CN 201220386400 U CN201220386400 U CN 201220386400U CN 202707609 U CN202707609 U CN 202707609U
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- impeller
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Abstract
The utility model relates to an internal-circulation cooling axial-flow impeller for a gas turbine generator. The impeller is arranged on a shaft of a rotor of the gas turbine generator through a hub, and torsion is transferred through interference fit of the hub and the shaft. The whole structure comprises wing-shaped blades, a wheel body and the hub, wherein the hub utilizes forging steel, and can bear high internal stress produced by the interference fit and centrifugal force produced by operation. A protruded insert of the T-shaped structure is arranged on an outer ring and is used for transferring the torsion and bearing the radial centrifugal force, and dovetail grooves arranged on two side faces of the wheel body are used for installation of balance blocks to adjust dynamic balance of the whole generator rotor. The impeller is in a standard flat bottom wing shape, warping is conducted for each radial section wing-shaped installation angle according to pressure distribution of air flow, and high-efficiency requirements are met. The impeller utilizes the large-hub-ratio structure, the hub ratio achieves 0.8, combination of the standard flat bottom wing shape and the large-hub-ratio structure can effectively improve the pressure factor, and therefore effective static pressure of a fan achieves 1500 pascals, flow quantity achieves 8 m<3>/s, and total-pressure efficiency achieves more than 70%.
Description
Technical field
The utility model relates to a kind of gas electricity generator with interior circulating cooling axial-flow blower, is applicable to circulating cooling system in the core component generator of large-scale fuel gas generation unit.
Background technique
The fuel gas generation unit is to adapt to world's environmental requirement and the new environment in market and the new-generation unit developed.The natural gas power unit mainly is divided into two kinds, and a kind of is combined cycle gas turbine, and a kind of is gas internal-combustion engine.Combustion turbine power is larger, mainly is used in large and medium-sized power station, and gas internal-combustion engine power is smaller, mainly is used in small-sized distributed power station.It is the new green environment protection power that replaces fuel oil, coal-fired unit.The generator of circulating cooling impeller is used for the fuel gas generation unit in large and medium-sized power station in the rotor banding, and its core component generator is when operation work, and staor winding and rotor need in time to be taken away by cooling equipment because internal loss produces a large amount of heats; Be installed in axial-flow blower run-in synchronism on the rotor shaft.The hot air that heating component is produced is delivered to the air-air cooler of generator, hot air and cool exterior air heat exchange, and air is transported to the generator heating component along inner cycle channel again after the cooling, forms interior circulating cooling system with this.Axial-flow blower is the core component of interior circulation, and impeller need have high balance quality, can carry the Environmental Conditions of large internal stress, and the mobile driving force that provides of inner circulating air is provided axial-flow blower; According to traditional Calculation in Axial flow Impeller Design, existing Calculation in Axial flow Impeller Design is difficult to meet the demands.
Summary of the invention
The purpose of this utility model is to adapt to particular surroundings and the installation requirement of gas electricity generator cooling, and dike is for the interior circulating cooling axial-flow blower of a kind of gas electricity generator; Be that the wing blade axial-flow blower is used in the circulating cooling in gas electricity generator.
The technical solution of the utility model: a kind of gas electricity generator comprises wheel hub, wheel body and blade with interior circulating cooling axial-flow blower, it is characterized in that described should interior circulating cooling axial-flow blower be the overall structure that the forged steel wheel hub is bumped into the cast aluminium wheel body;
The wheel hub that described wheel hub adopts the forged steel material to make, the internal stress that produces is joined in the carrying interference.Inserting of 12 uniform protrusion T-Type structures arranged on the wheel hub outer ring, and the thickness of inserting of this protrusion T-Type structure is 22mm, and inner width is 50～60mm, and external width is 80～100mm, and wheel hub is bumped into the wheel body center by protruding inserting of T-Type structure;
Described wheel body is high hub ratio aial flow impeller structure, because this axial flow fan pressure coefficient is higher, the hub ratio of wheel body is 0.8, and the wheel body both sides have for the trapezoidal dovetail groove that the generator amature equilibrium block is installed, and blade adopts the flat wing blade structure of standard; Be combined with high hub ratio and make it to have relatively high coefficient of lift combined;
Described blade quantity is 19, with the quantity of 4 magnetic poles of generator amature prime number each other, to reduce pulsation and the noise of exit flow; Each cross section setting angle of blade twists by the pressure distribution of air-flow, and the setting angle distortion from the blade root to the blade tip changes to 5 °～6.5 °, and blade root position setting angle is 17～18.5 °.Wheel hub and wheel surface accurately process, and the check and correction dynamic balancing, make the impeller balance grade reach G2.5.
Because the impeller hub inner ring is logical and alternator shaft is interference fit, magnitude of interference is 0.40mm; The interference assembling can cause hub portion to produce the above internal stress of 160Mpa, centrifugal force produces the above internal stress of 40MPa during simultaneously impeller work running, wheel hub adopts the mode of forging the low carbon steel heat treated can satisfy the requirement of assembling internal stress and centrifugal force stack, makes it obtain reliable safety coefficient; Employing forged steel material can be avoided the material defective in the working process simultaneously, such as cast steel.Wheel body partly adopts casting aluminium material can reduce the weight of impeller as far as possible, is used for reducing the load of alternator shaft, and with this index request that reduces whole amount of unbalance, satisfies the requirement of the high balance quality of impeller.Inserting of T-Type structure protruded in the wheel hub outer ring can effective communication moment of torsion and carrying centrifugal force.
Circulating cooling axial-flow blower adopts high-efficiency airfoil blade for the requirement of greater efficiency in this, abandons this field tradition circular arc plate blade, guarantees pneumatic efficiency with this; Be high hub ratio structure through aerodynamics simu1ation calculative determination impeller, Effective Raise pressure coefficient; Make impeller when satisfying aeroperformance, guarantee its safety requirement.
Description of drawings
Fig. 1 is main TV structure schematic diagram of the present utility model;
Fig. 2 is right TV structure schematic diagram of the present utility model;
Fig. 3 is that A of the present utility model is to view;
Fig. 4 is wheel hub master TV structure schematic diagram;
Fig. 5 is the left TV structure schematic diagram of wheel hub;
Among the figure: the 1-wheel hub, the 2-wheel body, the 3-blade, the 4-dovetail groove, 5-inserts.
Embodiment
Referring to above-mentioned accompanying drawing, a kind of gas electricity generator comprises wheel hub 1, wheel body 2 and blade 3 with interior circulating cooling axial-flow blower, it is characterized in that circulating cooling axial-flow blower is the overall structure that the forged steel wheel hub is bumped into the cast aluminium wheel body in this;
The wheel hub that described wheel hub 1 adopts the forged steel material to make, forged steel pieces can bear the high internal stress that the interference assembling produces; What 12 uniform protrusion T-Type structures were arranged on wheel hub 1 outer ring inserts 5,5 thickness of inserting of this protrusion T-Type structure are 22mm, inner width is 50～60mm, and external width is 80～100mm, and wheel hub 15 is bumped into the wheel body center by protruding inserting of T-Type structure; Protrude inserting of T-Type structure and 5 be bumped into wheel body 2 inside, can transmitting torque and carrying centrifugal force;
Described wheel body 2 is high hub ratio aial flow impeller structure, and the hub ratio of wheel body 2 is 0.8, and wheel body 2 both sides have trapezoidal dovetail groove 4, is used for the generator amature equilibrium block is installed, and regulates the dynamic balancing of whole rotor, satisfies the generator system requirement.Blade 3 adopts the flat wing blade structure of standard, is defined as calculated big hub than structure, in conjunction with the reasonable twist in each cross section of blade, makes axial-flow blower have relatively high pressure coefficient and pneumatic efficiency.
The quantity of described blade 3 is 19, with the quantity of 4 magnetic poles of generator amature prime number each other, to reduce pulsation and the noise of exit flow; Each cross section setting angle of blade twists by the pressure distribution of air-flow, and the setting angle distortion from the blade root to the blade tip changes to 5 °～6.5 °, and blade root position setting angle is 17～18.5 ° and is the best.Wheel hub and wheel surface accurately process, and the check and correction dynamic balancing, make the impeller balance grade reach G2.5.
Impeller has adopted big hub than structure, and hub ratio reaches 0.8; Both be in conjunction with effectively improving pressure coefficient, so that effective static pressure of blower fan is when reaching 1500Pa, flow reaches 8m
3/ s, total pressure efficiency reaches more than 70%.
Claims (2)
1. a gas electricity generator comprises wheel hub (1), wheel body (2) and blade (3) with interior circulating cooling axial-flow blower, it is characterized in that described should interior circulating cooling axial-flow blower be the overall structure that the forged steel wheel hub is bumped into the cast aluminium wheel body;
The wheel hub that described wheel hub (1) adopts the forged steel material to make, insert (5) that 12 uniform protrusion T-Type structures are arranged on wheel hub (1) outer ring, (5) thickness of inserting of this protrusion T-Type structure is 22mm, inner width is 50～60mm, external width is 80～100mm, and wheel hub (1) is bumped into the wheel body center by insert (5) of protruding T-Type structure;
Described wheel body (2) is high hub ratio aial flow impeller structure, and the hub ratio of wheel body (2) is 0.8, and wheel body (2) both sides have for the trapezoidal dovetail groove (4) that the generator amature equilibrium block is installed, and blade (3) adopts the flat wing blade structure of standard.
2. a kind of gas electricity generator as claimed in claim 1 is with interior circulating cooling axial-flow blower, the quantity that it is characterized in that described blade (3) is 19, with the quantity of 4 magnetic poles of generator amature prime number each other, each cross section setting angle of blade twists by the pressure distribution of air-flow, setting angle distortion from the blade root to the blade tip changes to 5 °～6.5 °, and blade root position setting angle is 17 °～18.5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386400 CN202707609U (en) | 2012-08-06 | 2012-08-06 | Internal-circulation cooling axial-flow impeller for gas turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386400 CN202707609U (en) | 2012-08-06 | 2012-08-06 | Internal-circulation cooling axial-flow impeller for gas turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707609U true CN202707609U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220386400 Expired - Fee Related CN202707609U (en) | 2012-08-06 | 2012-08-06 | Internal-circulation cooling axial-flow impeller for gas turbine generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN202707609U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044426A (en) * | 2017-04-06 | 2017-08-15 | 无锡好力泵业有限公司 | The PM rotor of draining pump and the draining pump comprising it, washing machine |
| CN108757520A (en) * | 2018-06-15 | 2018-11-06 | 浙江理工大学上虞工业技术研究院有限公司 | The axial flow blower of novel impeller blade |
-
2012
- 2012-08-06 CN CN 201220386400 patent/CN202707609U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044426A (en) * | 2017-04-06 | 2017-08-15 | 无锡好力泵业有限公司 | The PM rotor of draining pump and the draining pump comprising it, washing machine |
| CN108757520A (en) * | 2018-06-15 | 2018-11-06 | 浙江理工大学上虞工业技术研究院有限公司 | The axial flow blower of novel impeller blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20210806 |