CN112234769A - Forced shunting type super-efficient motor - Google Patents
Forced shunting type super-efficient motor Download PDFInfo
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- CN112234769A CN112234769A CN202011368216.5A CN202011368216A CN112234769A CN 112234769 A CN112234769 A CN 112234769A CN 202011368216 A CN202011368216 A CN 202011368216A CN 112234769 A CN112234769 A CN 112234769A
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- air duct
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- stator
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- 239000002131 composite material Substances 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 230000030279 gene silencing Effects 0.000 claims description 16
- 230000017525 heat dissipation Effects 0.000 claims description 15
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a forced shunting type super-efficient motor, which comprises: the motor comprises a base, a stator, a rotor, a front end cover and a rear end cover. The air duct structure is characterized in that a first axial air duct and a second axial air duct are arranged on the barrel, the stator comprises a stator core, a stator tooth pressing plate and a stator coil, and the end of the stator core is connected with a first air duct. The rotor comprises a rotating shaft and a rotor iron core, the rotating shaft is provided with a composite centrifugal fan, and the composite centrifugal fan comprises an inner impeller and an outer impeller; the first air duct extends to the outer ring of the air inlet of the outer impeller; and the rotor air duct is communicated with the air inlet of the inner impeller through a second air duct. One end of the arc-shaped flow dividing baffle is connected with the cylinder, and the other end of the arc-shaped flow dividing baffle extends to a position between the air outlet of the inner impeller and the air outlet of the outer impeller. The motor achieves the purpose of reasonable flow distribution through the first air duct, the annular check ring, the composite centrifugal fan, the arc-shaped flow distribution baffle and the base with the multiple air channels.
Description
Technical Field
The invention belongs to the technical field of explosion-proof motors, and particularly relates to a forced shunting type super-efficient motor.
Background
With the rapid development of the industry, various new and higher requirements are continuously put on the motor, the single-machine capacity of the motor is further increased, and the efficiency and the power density are further improved. The steady-state temperature rise of the motor is an important factor related to the service life and the operation reliability of the motor. The relationship between the steady-state temperature rise of the motor and other indexes is properly processed, which is often the key to the success or failure of the whole research and development work. The invention patent with publication number CN110649766A discloses a double-suction shunting type super-efficient motor, which comprises a base, a stator and a rotor, wherein the base comprises a cylinder body, an axial flow inner fan and a centrifugal inner fan are sequentially arranged at the non-axial-extending end of a rotating shaft positioned in the cylinder body, an inner air duct which protrudes outwards along the radial direction of the cylinder body and is communicated with two ends of the inner cavity of the cylinder body is arranged on the cylinder body, a first air inlet and a first air outlet are respectively arranged at two ends of the inner air duct, an arc shunting baffle plate is arranged in the cylinder body, the arc shunting baffle plate is in a hollow disc shape, the outer edge of the arc shunting baffle plate divides the first air inlet of the inner air duct into two parts, and the inner. The arc-shaped flow dividing baffle reduces the gas vortex and the resistance loss inside the cylinder, so that the gas circulation efficiency in the cylinder is improved. The motor finds that the air exhausted by the centrifugal inner fan and the axial flow inner fan is intersected in the inner air duct in actual use, the circulation efficiency of the air flow generated by the centrifugal inner fan can be reduced, and the cooling effect of the motor cannot reach the expected effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method.
In order to solve the technical problems, the invention adopts the technical scheme that:
a forced-commutated ultra-high efficiency electric machine, comprising: the motor comprises a base, a stator, a rotor, a front end cover and a rear end cover.
The base comprises a barrel and a base, and the barrel is fixedly connected with the base; the barrel is provided with a plurality of first axial air channels and second axial air channels which are formed by protruding outwards along the radial direction of the barrel, and the first axial air channels and the second axial air channels are uniformly distributed along the circumferential direction of the barrel and are alternately arranged.
The stator comprises a stator core, a stator tooth pressing plate and a stator coil which are fixed into a whole, and the stator core is arranged in the cylinder; the end part of the stator core is connected with a first air duct.
The rotor comprises a rotating shaft and a rotor core, an annular retainer ring is arranged at the non-shaft-extension end of the rotor core, a composite centrifugal fan close to the non-shaft-extension end is coaxially arranged on the rotating shaft, and the composite centrifugal fan comprises an inner impeller and an outer impeller which are coaxially fixed; the first air duct extends from the end part of the stator iron core to the outer ring of the air inlet of the outer impeller; rotor air ducts are uniformly distributed on the circumference of the rotor iron core, a second air duct is arranged between the inner impeller and the rotor iron core, and the rotor air ducts are communicated with an air inlet of the inner impeller through the second air duct.
The rear end cover is fixedly connected with the non-shaft-extending end of the cylinder body, an arc-shaped flow dividing baffle is arranged between the rear end cover and the non-shaft-extending end of the cylinder body, one end of the arc-shaped flow dividing baffle is connected with the cylinder body, and the other end of the arc-shaped flow dividing baffle extends to a position between the air outlet of the inner impeller and the air outlet of the outer impeller; the air inlet of the first axial air duct is positioned on the inner side of the arc-shaped shunting baffle, and the air inlet of the second axial air duct is positioned on the outer side of the arc-shaped shunting baffle.
The front end cover is fixedly connected with the shaft extension end of the cylinder body.
The outer surface of the cylinder body is provided with heat dissipation ribs, and outer air ducts are formed in gaps among the heat dissipation ribs.
The non-shaft-extending end of the rotating shaft penetrates out of the center of the rear end cover, a centrifugal outer fan is arranged at the non-shaft-extending end of the rotating shaft, the rear end cover is connected with a silencing fan cover, and an air outlet of the silencing fan cover is communicated with the outer air duct.
The silencing cotton is filled in the silencing fan cover.
The pivot with all there is the bearing between the front end housing with the rear end cap, and seal fixedly through the bearing enclosing cover and the bearing inner cup in the bearing inside and outside respectively, all be equipped with the oiling pipe on the bearing enclosing cover of the bearing at preceding, back both ends, the oiling pipe fixed connection of amortization fan housing and rear end cap department.
The rotating shaft is provided with a balance ring near the shaft extension end.
The cross section of the first air duct is Z-shaped.
The arc-shaped flow dividing baffle plate is connected with the rear end cover through a support frame.
The invention has the beneficial effects that: the composite centrifugal fan of the motor is fixed on the non-shaft-extending end side of a rotating shaft in the cylinder and is used as an internal air path power element to form an internal circulating cooling system to perform enhanced heat transfer on each heating element and a ventilation system in the motor; the first air duct and the rotor annular retainer ring are used for controlling the flowing direction of air flow between the stator and the rotor air gaps, and performing forced heat dissipation on the outer surface of the rotor to reduce heat transferred from the outer surface of the rotor to the stator, so that the effects of improving the heat dissipation performance of the rotor and the overall heat dissipation performance in the motor are achieved; the arc-shaped flow dividing baffle is used for dividing air flow sucked by the composite centrifugal fan, so that the air flow at the air gap inside the motor and the air flow in the rotor air channel can circularly flow through the first axial air channel and the second axial air channel respectively, and the cooling capacity is improved. The ventilation mode achieves the purpose of reasonable flow distribution through the first air duct, the annular retainer ring, the composite centrifugal fan, the arc-shaped flow distribution baffle and the base with the multiple air channels.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the circulation structure at the rotor wind tunnel of the present invention;
FIG. 3 is a schematic view of the circulation structure at the air gap of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
fig. 5 is a sectional view taken along line B-B of fig. 3.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
As shown in fig. 1 to 5, a forced-shunting type ultra high efficiency motor includes: the motor comprises a base 1, a stator 2, a rotor 3, a front end cover 5 and a rear end cover 4.
The machine base 1 comprises a cylinder 11 and a base 12, wherein the cylinder 11 is fixedly connected with the base 12; the barrel 11 is provided with a plurality of first axial air ducts 14 and second axial air ducts 15 which are formed by protruding outwards along the radial direction of the barrel 11, and the first axial air ducts 14 and the second axial air ducts 15 are uniformly distributed along the circumferential direction of the barrel 11 and are alternately arranged.
The stator 2 comprises a stator core 21, a stator tooth pressing plate 23 and a stator coil 22 which are fixed into a whole, wherein the stator tooth pressing plate 23 is fixed on the stator core 21, and the stator core 21 is arranged in the cylinder 11; the end of the stator core 21 is connected with a first air duct 7.
The rotor 3 comprises a rotating shaft 31 and a rotor core 32, an annular retainer ring 34 is arranged at the non-shaft-extension end of the rotor core 32, a composite centrifugal fan 6 close to the non-shaft-extension end is coaxially arranged on the rotating shaft 31, and the composite centrifugal fan 6 comprises an inner impeller 61 and an outer impeller 62 which are coaxially fixed; the first air duct 7 extends from the end of the stator core 21 to the outer ring of the air inlet of the outer impeller 62; rotor air ducts 33 are uniformly distributed on the circumference of the rotor core 32, a second air duct 9 is arranged between the inner impeller 61 and the rotor core 32, and the rotor air ducts 33 are communicated with an air inlet of the inner impeller 61 through the second air duct 9.
The rear end cover 4 is fixedly connected with the non-shaft-extending end of the cylinder 11, an arc-shaped shunt baffle 8 is arranged between the rear end cover and the cylinder 11, one end of the arc-shaped shunt baffle 8 is connected with the cylinder 11, and the other end of the arc-shaped shunt baffle extends to a position between the air outlet of the inner impeller 61 and the air outlet of the outer impeller 62; the air inlet of the first axial air duct 14 is located on the inner side of the arc-shaped flow dividing baffle 8, and the air inlet of the second axial air duct 15 is located on the outer side of the arc-shaped flow dividing baffle 8.
The front end cover 5 is fixedly connected with the shaft extension end of the cylinder body 11.
The outer surface of the cylinder body 11 is provided with heat dissipation ribs 13, and an outer air duct is formed in the gaps of the heat dissipation ribs 13. The airflow ejected from the air outlet of the silencing fan housing 10 flows along the heat dissipation ribs 13, gradually decelerates and diffuses, and cools the surface of the base 1.
The non-shaft-extending end of the rotating shaft 31 penetrates out of the center of the rear end cover 4, a centrifugal outer fan 101 is arranged at the non-shaft-extending end of the rotating shaft, a silencing fan cover 10 is connected to the rear end cover 4, and an air outlet of the silencing fan cover 10 is communicated with the outer air duct.
The silencing cotton is filled in the silencing wind cover 10.
The rotating shaft 31 and the front end cover 5 and the rear end cover 4 are all provided with bearings, the bearings are respectively fixed in a sealing mode through the bearing outer covers and the bearing inner covers on the inner side and the outer side of the bearings, oil injection pipes are arranged on the bearing outer covers of the bearings at the front end and the rear end, and the silencing fan cover 10 is fixedly connected with the oil injection pipes at the rear end cover 4.
The rotating shaft 31 is provided with a balance ring 35 near the shaft extension end.
The cross section of the first air duct 7 is Z-shaped.
The arc-shaped flow dividing baffle plate 8 is connected with the rear end cover 4 through a supporting frame 81.
The ventilation and heat dissipation of the invention are divided into an outer wind path and an inner wind path, and the specific working process of the motor is as follows:
1. an inner air passage: and a composite centrifugal fan 6 is arranged on the rotor 3, and the composite centrifugal fan 6 divides the circulating air flow in the motor into two paths. The composite centrifugal fan 6 throws a part of the air flow entering the rotor air duct 33 into the second axial air duct 15 with even number in fig. 4 in the air duct 17 of the base 1; meanwhile, the other part of the airflow entering the air gap between the stator core 21 and the rotor core 32 is thrown into the first axial air duct 14, numbered in odd numbers in fig. 4, in the machine base 1. In the process, the annular retainer ring 34 of the rotor 3 and the first air duct 7 are used for controlling the air flow flowing out of the air gap between the stator core 21 and the rotor core 32 to smoothly enter the composite centrifugal fan 6. The arc-shaped flow dividing baffle 8 is used for forcing the air flow at the air gap and the air flow at the rotor air duct 33 to pass through the composite centrifugal fan and then to be divided and respectively enter the first axial air duct 14 and the second axial air duct 15. The air flow in the first axial air duct 14 and the second axial air duct 15 is conducted with the heat transfer with the cylinder 11 and then led out through the heat dissipation ribs 13.
2. An external air path: under the suction action of the centrifugal outer fan 101 of the power element, the outer air path cooling system enables air flow to enter the interior of the fan housing from the circumferential direction of the silencing fan housing 10, the air flow is sprayed out from the air outlet of the silencing fan housing 10 through the rotation pressurization of the centrifugal outer fan 101, enters an outer air channel formed by the gaps of the heat dissipation ribs 13 of the base 1, flows along the heat dissipation ribs 13, gradually decelerates and diffuses, cools the surface of the motor, and finally flows into the atmosphere through the shaft extension end.
The heat generated in the motor is conducted with heat conduction between the barrel 11, the front end cover 5, the rear end cover 4 and the heat dissipation ribs 13 and external air flow, so that the temperature of each position in the motor is maintained in a reasonable range, and the motor can be guaranteed to operate normally and reliably.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in 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, are not to be construed as limiting the scope of the present invention.
Claims (8)
1. A forced-shunt type super-efficient motor, comprising:
the engine base comprises a cylinder body and a base, and the cylinder body is fixedly connected with the base; the cylinder is provided with a plurality of first axial air channels and second axial air channels which are formed by protruding outwards along the radial direction of the cylinder, the first axial air channels and the second axial air channels are uniformly distributed along the circumferential direction of the cylinder and are alternately arranged;
the stator comprises a stator core, a stator tooth pressing plate and a stator coil which are fixed into a whole, wherein the stator core is arranged in the cylinder; the end part of the stator core is connected with a first air duct;
the rotor comprises a rotating shaft and a rotor core, wherein an annular retainer ring is arranged at the non-shaft-extension end of the rotor core, a composite centrifugal fan close to the non-shaft-extension end is coaxially arranged on the rotating shaft, and the composite centrifugal fan comprises an inner impeller and an outer impeller which are coaxially fixed; the first air duct extends from the end part of the stator iron core to the outer ring of the air inlet of the outer impeller; rotor air ducts are uniformly distributed on the circumference of the rotor iron core, a second air duct is arranged between the inner impeller and the rotor iron core, and the rotor air ducts are communicated with an air inlet of the inner impeller through the second air duct;
the rear end cover is fixedly connected with the non-shaft-extending end of the cylinder body, an arc-shaped shunting baffle is arranged between the rear end cover and the non-shaft-extending end of the cylinder body, one end of the arc-shaped shunting baffle is connected with the cylinder body, and the other end of the arc-shaped shunting baffle extends to a position between the air outlet of the inner impeller and the air outlet of the outer impeller; the air inlet of the first axial air duct is positioned on the inner side of the arc-shaped flow dividing baffle, and the air inlet of the second axial air duct is positioned on the outer side of the arc-shaped flow dividing baffle; and
and the front end cover is fixedly connected with the shaft extension end of the cylinder body.
2. The forced shunting type ultra-high efficiency motor according to claim 1, wherein: the outer surface of the cylinder body is provided with heat dissipation ribs, and outer air ducts are formed in gaps among the heat dissipation ribs.
3. The forced shunting type ultra-high efficiency motor according to claim 2, wherein: the non-shaft-extending end of the rotating shaft penetrates out of the center of the rear end cover and is provided with a centrifugal outer fan, the rear end cover is connected with a silencing fan cover, and an air outlet of the silencing fan cover is communicated with the outer air duct.
4. The forced shunting type ultra-high efficiency motor according to claim 3, wherein: the silencing cotton is filled in the silencing fan cover.
5. The forced shunting type ultra-high efficiency motor according to claim 3, wherein: the pivot with all there is the bearing between the front end housing with the rear end cap, and seal fixedly through the bearing enclosing cover and the bearing inner cup in the bearing inside and outside respectively, all be equipped with the oiling pipe on the bearing enclosing cover of the bearing at preceding, back both ends, the oiling pipe fixed connection of amortization fan housing and rear end cap department.
6. The forced shunting type ultra-high efficiency motor according to claim 1, wherein: the rotating shaft is provided with a balance ring near the shaft extension end.
7. The forced shunting type ultra-high efficiency motor according to claim 1, wherein: the cross section of the first air duct is Z-shaped.
8. The forced shunting type ultra-high efficiency motor according to claim 1, wherein: the arc-shaped flow dividing baffle plate is connected with the rear end cover through a support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011368216.5A CN112234769B (en) | 2020-11-30 | 2020-11-30 | Forced split-flow type ultra-efficient motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011368216.5A CN112234769B (en) | 2020-11-30 | 2020-11-30 | Forced split-flow type ultra-efficient motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112234769A true CN112234769A (en) | 2021-01-15 |
| CN112234769B CN112234769B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011368216.5A Active CN112234769B (en) | 2020-11-30 | 2020-11-30 | Forced split-flow type ultra-efficient motor |
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| CN (1) | CN112234769B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541398A (en) * | 2021-07-14 | 2021-10-22 | 中车株洲电机有限公司 | Permanent magnet motor and rail locomotive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541398A (en) * | 2021-07-14 | 2021-10-22 | 中车株洲电机有限公司 | Permanent magnet motor and rail locomotive |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112234769B (en) | 2024-05-28 |
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