CN113206577A - Generator with assembled centrifugal fan - Google Patents

Generator with assembled centrifugal fan Download PDF

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Publication number
CN113206577A
CN113206577A CN202110398984.3A CN202110398984A CN113206577A CN 113206577 A CN113206577 A CN 113206577A CN 202110398984 A CN202110398984 A CN 202110398984A CN 113206577 A CN113206577 A CN 113206577A
Authority
CN
China
Prior art keywords
generator
centrifugal fan
end cover
rotating shaft
assembled centrifugal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110398984.3A
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Chinese (zh)
Inventor
徐志强
罗建群
刘雪姣
刘明军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kangfu Technology Co ltd
Original Assignee
Kangfu Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kangfu Technology Co ltd filed Critical Kangfu Technology Co ltd
Priority to CN202110398984.3A priority Critical patent/CN113206577A/en
Publication of CN113206577A publication Critical patent/CN113206577A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention is a generator with assembled centrifugal fan, including: the generator comprises a generator base, a front end cover and a rear end cover; a stator for generating a magnetic field; a rotor which is a conductor that can rotate in a magnetic field generated by the stator; the rotating shaft is connected to the middle part of the inner cavity of the generator base, and one end of the rotating shaft in the direction of the front end cover extends to a position far away from the front end cover and is matched with an external acting piece; the assembled centrifugal fan is connected to the rotating shaft and is positioned on one side, close to the front end cover, of the inner cavity of the generator base; when the rotating shaft is matched with an external acting element to rotate, the rotating shaft can drive the rotor to rotate in a magnetic field generated by the stator to generate induced electromotive force, and drives the assembled centrifugal fan to rotate to radiate heat of the inner cavity of the generator base; assembled centrifugal fan includes front bezel, back plate and blade, has on front bezel and the back plate with the connecting hole of blade looks adaptation, and the blade is connected between front bezel and back plate, and the blade can carry out the setting of corresponding size according to the demand of different generators.

Description

Generator with assembled centrifugal fan
Technical Field
The invention relates to the technical field of generators, in particular to a generator with an assembled centrifugal fan.
Background
In a synchronous generator, the heat dissipation design of a winding is a very important part of the design of the generator, and the heat dissipation effect of the winding directly influences the temperature rise of the winding and influences the reliability and the economy of the generator. The air-cooled generator is generally provided with a centrifugal fan at one end of a generator rotor, air enters the generator from one end of the generator through the fan, passes through a stator and a rotor of the generator, and brings heat generated by the generator out from the other end of the generator, so that the purpose of heat dissipation of the stator and the rotor is achieved.
Generally, the centrifugal fan of the generator with larger power adopts an aluminum casting or a steel plate welding part, the centrifugal fan welded by the steel plate has a complex processing technology, the processing difficulty of the shapes of the blade and the front plate is large, the welding quality requirement is high, and the cost is high, so the centrifugal fan is less adopted. The existing centrifugal fan for the cast aluminum part is mainly adopted, the casting mould cost of the centrifugal fan for the cast aluminum part is high, and the centrifugal fan cannot be changed at will after the mould is formed.
Under the condition that the same stator punching external diameter is the same, the generator can be designed to different rotating speeds, different steering directions and different powers. Therefore, the integrally cast centrifugal fan cannot meet the requirements of generators with different rotating speeds, different steering directions and different powers at the same time. Different casting molds need to be opened to meet the requirements of the generator, so that the manufacturing cost is greatly increased.
When a new centrifugal fan is designed, due to the fact that the air paths for heat dissipation of the generator are different, the heat productivity of the generator is different, the centrifugal fan designed through theoretical calculation and simulation often has certain deviation with the heat dissipation effect, noise and efficiency of a test result, if the centrifugal fan needs to be adjusted, a mold needs to be re-opened, and therefore research and development cost is increased.
Disclosure of Invention
The invention provides a generator with an assembled centrifugal fan, which aims to solve the technical problems.
The technical purpose of the invention is realized by the following technical scheme:
a generator with an assembled centrifugal fan, comprising:
the generator base is used as a shell of the whole generator;
the front end cover is connected to one side of the generator base;
the rear end cover is connected to the other side of the generator base;
the stator is arranged in the inner cavity of the generator base; for generating a magnetic field;
the rotor is arranged in the inner cavity of the generator base and is a conductor which can rotate in a magnetic field generated by the stator;
the rotating shaft is connected to the middle part of the inner cavity of the generator base along the direction of the central connecting line of the front end cover and the rear end cover, and one end of the rotating shaft in the direction of the front end cover extends to a position far away from the front end cover and is matched with an external acting element;
the assembled centrifugal fan is connected to the rotating shaft and is positioned on one side, close to the front end cover, of the inner cavity of the generator base;
when the rotating shaft is matched with an external acting element to rotate, the rotating shaft can drive the rotor to rotate in a magnetic field generated by the stator to generate induced electromotive force, and the assembled centrifugal fan is driven to rotate to radiate heat of the inner cavity of the generator base; assembled centrifugal fan includes front bezel, back plate and blade, the front bezel with have on the back plate with the connecting hole of blade looks adaptation, the blade connect in the front bezel with between the back plate, just the blade can carry out the setting of corresponding size according to the demand of different generators.
Furthermore, the rear end cover is provided with an air inlet, and the generator base is provided with an air outlet.
Further, the center of the front plate is provided with a mounting hole matched with the rotating shaft, and the mounting hole is provided with a key groove.
Further, the front plate includes a straight portion having a screw hole for fixing the vane and an arc portion adapted to the vane.
Further, the back plate is annular and has a threaded hole for fixing the blade.
Furthermore, the blades are in a curved arc shape and are connected and matched with the front plate and the rear plate to form plane ends.
Further, the front plate, the rear plate and the blades are cast by an aluminum casting die.
The invention has the beneficial effects that:
the invention adopts the assembled centrifugal fan, the large-size front plate and the large-size rear plate of the centrifugal fan only need to be provided with a pair of dies respectively, the small-size blades are provided with different dies, and the installation position and the shape of the blades are changed, so that the assembled centrifugal fan can be respectively a forward-inclined centrifugal fan and a backward-inclined centrifugal fan to meet the requirements of generators with different rotating speeds and different steering directions, the size of the blades is changed to meet the requirements of generators with different powers, the heat dissipation and the noise of the generators are realized, and the efficiency is in an excellent state. The cost of the blade mould is greatly less than that of the whole centrifugal fan mould, and the blade mould is convenient and simple to connect through bolts, so that the blade mould has the advantages of low cost and convenient and simple assembly.
Drawings
FIG. 1 is a schematic half-sectional view of a generator with an assembled centrifugal fan;
FIG. 2 is a front view of the assembled centrifugal fan;
FIG. 3 is a right side view of the assembled centrifugal fan;
FIG. 4 is a front view of the front plate;
FIG. 5 is a right side view of the front plate;
FIG. 6 is a front view of the blade;
FIG. 7 is a right side view of the blade;
FIG. 8 is a front view of the back plate;
FIG. 9 is a right side view of the back plate;
FIG. 10 is a schematic view of an assembled centrifugal fan with increased blade width;
FIG. 11 is a schematic view of an assembled centrifugal fan with increased blade length;
FIG. 12 is a schematic view of an assembled centrifugal fan with reduced blade length;
fig. 13 is a schematic structural view of the assembled centrifugal fan after the mounting position of the blades is changed.
1. A generator base; 2. a front end cover; 3. a rear end cap; 4. a stator; 5. a rotor; 6. a rotating shaft; 7. an assembled centrifugal fan; 11. an air outlet; 31. an air inlet; 71. a front plate; 72. a back plate; 73. a blade; 711. and (7) installing holes.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1 to 13, the present invention provides a generator with an assembled centrifugal fan, comprising:
a generator base 1 as a housing of the entire generator;
the front end cover 2 is connected to one side of the generator base 1;
the rear end cover 3 is connected to the other side of the generator base 1;
the stator 4 is arranged in the inner cavity of the generator base 1; for generating a magnetic field;
the rotor 5 is arranged in the inner cavity of the generator base 1 and is a conductor which can rotate in a magnetic field generated by the stator 4;
the rotating shaft 6 is connected to the middle part of the inner cavity of the generator base 1 along the direction of the central connecting line of the front end cover 2 and the rear end cover 3, and one end of the rotating shaft in the direction of the front end cover 2 extends to a position far away from the front end cover 2 and is matched with an external acting element;
the assembled centrifugal fan 7 is connected to the rotating shaft 6 and is positioned on one side, close to the front end cover 2, of the inner cavity of the generator base 1;
when the rotating shaft 6 is matched with an external acting element to rotate, the rotor 5 can be driven to rotate in a magnetic field generated by the stator 4 to generate induced electromotive force, and the assembled centrifugal fan 7 is driven to rotate to dissipate heat of the inner cavity of the generator base 1; the assembled centrifugal fan 7 comprises a front plate 71, a rear plate 72 and blades 73, wherein the front plate 71 and the rear plate 72 are provided with connecting holes matched with the blades 73, the blades 73 are connected between the front plate 71 and the rear plate 73, and the blades 73 can be arranged in corresponding sizes according to the requirements of different generators.
Specifically, the rear end cover 3 has an air inlet 31, and the generator base 1 has an air outlet 11.
Specifically, the front plate 71 has a mounting hole at the center thereof for fitting the rotary shaft 6, and the mounting hole 711 has a key groove.
Specifically, the front plate 71 includes a straight portion having a screw hole for fixing the vane 73 and an arc portion adapted to the vane 73.
Specifically, the rear plate 72 is annular and has screw holes for fixing the blades 73.
Specifically, the blade 73 has a curved arc shape and is divided into flat ends in a coupling ratio with the front plate 71 and the rear plate 72.
Specifically, the front plate 71, the rear plate 72, and the blades 73 are cast by a cast aluminum mold.
More specifically, the generator base 1 is in a hollow column shape, and a front end cover 2 and a rear end cover 3 are connected to two end faces of the generator base 1; the rotating shaft 6 is connected with the middle parts of the front end cover 2 and the rear end cover 3 and is positioned in the middle position of an inner cavity of the generator base 1, one end of the rotating shaft 6 at the front end cover 2 extends to the outside of the inner cavity of the generator base 1 and is matched with an external matching piece to rotate, a stator 4 and a rotor 5 are arranged in the inner cavity of the generator base 1, the rotor and the rotating shaft 6 are in linkage relation, the rotating shaft 6 can drive the rotor 5 to rotate, the stator 4 can generate a magnetic field, the rotor 5 is a conductor and can rotate in the magnetic field generated by the stator 4 to generate induced electromotive force, an assembled centrifugal fan 7 is arranged at one side of the inner cavity of the generator base 1 close to the front end cover 2, an air inlet 31 is arranged on the rear end cover 3, an air outlet 11 is arranged at the side part of the generator base 1, when the rotating shaft 6 starts to rotate to generate electricity, the assembled centrifugal fan 7 can also rotate to suck cold air required by the generator from the air inlet 31 opened on the rear end cover 3 of the generator, the cold air passes through the stator 4 and the rotor 5 and then discharges the heat of the generator from the air outlet 11 of the generator base 1, so that the heat of the inner cavity of the engine is dissipated.
As shown in fig. 2 and 3, the assembled centrifugal fan 7 is composed of a front plate 71, a rear plate 72, and blades 73 fixed by bolts, and the front plate 71, the rear plate 72, and the blades 73 are each made by a cast aluminum mold.
As shown in fig. 4 and 5, the front plate 71 has a mounting hole in the middle thereof for fitting the shaft 6, and the mounting hole 711 has a key groove. The front plate 71 integrally includes a straight portion having a screw hole for fixing the vane 73 and an arc portion adapted to the vane 73.
As shown in fig. 6 and 7, the blade 73 is curved as a whole, and the joint with the front plate 71 and the rear plate 72 is a flat surface.
As shown in fig. 8 and 9, both end surfaces of the rear plate 72 are flat.
As shown in fig. 10-12, the blades 73 can be designed to be adapted according to the needs of the actual generator, and the width and length of the blades can be adapted to change with the change of the power of the generator or the change of the rotating speed. The assembled centrifugal fan 7 is enabled to achieve excellent heat dissipation, noise reduction and efficiency, the size of the blades 73 is far smaller than that of the whole fan, and the cost of the die can be greatly reduced.
As shown in fig. 13, the positions of the mounting holes of the front plate 71, the rear plate 72 and the blades 73 are adjusted according to different rotation speeds and different rotation directions of the generator to obtain the assembled centrifugal fan 7 different from those in fig. 2, so that the ventilation and heat dissipation performance of the assembled centrifugal fan 7 can be improved according to different rotation speeds and rotation directions, the heat dissipation performance and the noise reduction performance of the generator can be in an excellent state, a plurality of integral fan molds are not required, and the manufacturing cost is greatly saved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (7)

1. A generator with an assembled centrifugal fan, comprising:
a generator base (1) as a housing of the whole generator;
the front end cover (2) is connected to one side of the generator base (1);
the rear end cover (3) is connected to the other side of the generator base (1);
the stator (4) is arranged in an inner cavity of the generator base (1); for generating a magnetic field;
the rotor (5) is arranged in the inner cavity of the generator base (1) and is a conductor capable of rotating in a magnetic field generated by the stator (4);
the rotating shaft (6) is connected to the middle of the inner cavity of the generator base (1) along the direction of the central connecting line of the front end cover (2) and the rear end cover (3), and one end of the rotating shaft in the direction of the front end cover (2) extends to a position far away from the front end cover (2) and is matched with an external acting piece;
the assembled centrifugal fan (7) is connected to the rotating shaft (6) and is positioned on one side, close to the front end cover (2), of the inner cavity of the generator base (1);
when the rotating shaft (6) is matched with an external acting element to rotate, the rotor (5) can be driven to rotate in a magnetic field generated by the stator (4) to generate induced electromotive force, and the assembled centrifugal fan (7) is driven to rotate to radiate heat of the inner cavity of the generator base (1); the assembled centrifugal fan (7) comprises a front plate (71), a rear plate (72) and blades (73), wherein connecting holes matched with the blades (73) are formed in the front plate (71) and the rear plate (72), the blades (73) are connected between the front plate (71) and the rear plate (72), and the blades (73) can be arranged in a corresponding size according to requirements of different generators.
2. The generator with assembled centrifugal fan of claim 1, characterized in that:
the rear end cover (3) is provided with an air inlet (31), and the generator base (1) is provided with an air outlet (11).
3. The generator with assembled centrifugal fan of claim 1, characterized in that:
the center of the front plate (71) is provided with a mounting hole matched with the rotating shaft (6), and the mounting hole (711) is provided with a key slot.
4. The generator with assembled centrifugal fan of claim 1, characterized in that:
the front plate (71) includes a straight portion having a screw hole for fixing the blade (73) and an arc portion adapted to the blade (73).
5. The generator with assembled centrifugal fan of claim 1, characterized in that:
the rear plate (72) is annular and has a threaded hole for fixing the blade (73).
6. The generator with assembled centrifugal fan of claim 1, characterized in that:
the blades (73) are in a curved arc shape, and are connected with the front plate (71) and the rear plate (72) in a matching manner to be divided into plane ends.
7. The generator with assembled centrifugal fan of claim 1, characterized in that:
the front plate (71), the rear plate (72) and the blades (73) are cast by an aluminum casting die.
CN202110398984.3A 2021-04-13 2021-04-13 Generator with assembled centrifugal fan Pending CN113206577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110398984.3A CN113206577A (en) 2021-04-13 2021-04-13 Generator with assembled centrifugal fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110398984.3A CN113206577A (en) 2021-04-13 2021-04-13 Generator with assembled centrifugal fan

Publications (1)

Publication Number Publication Date
CN113206577A true CN113206577A (en) 2021-08-03

Family

ID=77026801

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110398984.3A Pending CN113206577A (en) 2021-04-13 2021-04-13 Generator with assembled centrifugal fan

Country Status (1)

Country Link
CN (1) CN113206577A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023130325A1 (en) * 2022-01-06 2023-07-13 Abb Schweiz Ag Centrifugal fan with back blades

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023130325A1 (en) * 2022-01-06 2023-07-13 Abb Schweiz Ag Centrifugal fan with back blades

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