CN113572289B - Oil-cooling hollow rotating shaft structure - Google Patents
Oil-cooling hollow rotating shaft structure Download PDFInfo
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- CN113572289B CN113572289B CN202110754877.XA CN202110754877A CN113572289B CN 113572289 B CN113572289 B CN 113572289B CN 202110754877 A CN202110754877 A CN 202110754877A CN 113572289 B CN113572289 B CN 113572289B
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- oil
- shaft body
- rotating shaft
- cavity
- inner cavity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
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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
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0417—Heat exchangers adapted or integrated in the gearing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses an oil-cooled hollow rotating shaft structure which comprises a first connecting part and a second connecting part, wherein the first connecting part comprises a first shaft end and a first shaft body which are connected, the second connecting part comprises a second shaft end and a second shaft body which are connected, the first shaft body and the second shaft body are connected in a sealing mode to form a rotating shaft body, a blind hole cavity is arranged in the first connecting part, the blind hole cavity faces one side of the second connecting part and is opened, an oil inlet hole and a first inner cavity which are communicated are arranged in the second shaft end, a second inner cavity is arranged in the second shaft body and is communicated with the first inner cavity, a sealing plug is arranged at the end part of the second shaft body and is used for separating the blind hole cavity from the second inner cavity, an axial oil way is arranged on the rotating shaft body and is communicated with the second inner cavity, the axial oil way is also connected with a first oil passing hole and a second oil passing hole, and cooling oil flows out of the rotating shaft body through the first oil passing hole and the second oil passing hole. According to the invention, on the premise of ensuring the lightweight design, the gathering of oil in the hollow rotating shaft structure can be effectively reduced.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to an oil-cooled hollow rotating shaft structure.
Background
Along with the requirement for the power of the motor is higher and higher, the requirement for the heat dissipation of the motor is gradually increased, and the heat dissipation mode of the motor is changed. The scheme that the cooling oil is used for directly cooling and radiating heating parts of the motor is wide, and the common oil way form of the oil-cooled motor at present is as follows: after external oil enters the motor, a first oil path is led into the shell, and the stator core and the end winding are cooled through an oil path or an oil injection hole on the shell; the second oil path enters the oil path inside the hollow rotating shaft through the oil path on the end cover and then enters the oil path inside the rotor, so that the rotor iron core and the magnetic steel are cooled, and meanwhile, the oil coming out of the rotor can be thrown and sprayed on the inner side of the end wire package to cool the wire package. The structure that the hollow rotating shaft inner cavity is used as a part of an oil circuit is a main flow structure, the typical structure of the structure is shown in figure 1, cooling oil enters the rotating shaft inner cavity from one end of the rotating shaft, gathers in the cavity, and then enters the iron core inner oil circuit through the rotating shaft radial hole under the action of high-speed centrifugal force, so that the effect of cooling the rotor is achieved, but the structure has the following defects: if only the oil transportation requirement is met, a smaller cavity is formed, the weight of the rotor is increased, and the light weight design requirement cannot be met; if a large cavity is designed to meet the requirement of light weight, a large amount of oil liquid in the rotor is gathered; the rotor dynamic unbalance value is increased, and oil surges when rotating simultaneously, so that the NVH performance is reduced, and the torque fluctuation is increased. Therefore, there is a high necessity for an oil-cooled hollow rotating shaft structure capable of solving the above problems.
Disclosure of Invention
Aiming at the technical problems, the invention provides an oil-cooled hollow rotating shaft structure which can reduce the problems caused by oil liquid aggregation in the hollow rotating shaft as much as possible on the premise of ensuring lightweight design and assembly manufacturability and meeting the requirement of oil guiding.
The technical scheme of the invention is as follows:
an oil-cooled hollow rotating shaft structure comprises a first connecting part and a second connecting part, wherein the first connecting part comprises a first shaft end and a first shaft body which are connected, the second connecting part comprises a second shaft end and a second shaft body which are connected, the first shaft body and the second shaft body are connected in a sealing manner to form a rotating shaft body, a blind hole cavity is arranged in the first connecting part and faces to an opening on one side of the second connecting part, an oil inlet hole and a first inner cavity which are communicated are arranged in the second shaft end, a second inner cavity is arranged in the second shaft body and is communicated with the first inner cavity, a sealing plug is arranged at the end part of the sealing plug, the blind hole cavity is separated from the second inner cavity, an axial oil path is arranged on the rotating shaft body and is communicated with the second inner cavity, and the axial oil path is also connected with a first oil passing hole and a second oil passing hole, and the cooling oil flows out of the rotating shaft body through the first oil passing hole and the second oil passing hole.
Preferably, the end part of the second shaft body is provided with an annular mounting plate, the annular mounting plate is inserted into the blind hole cavity, the sealing plug is in a bowl shape, and the sealing plug is plugged into the annular mounting plate and hermetically separates the second inner cavity from the blind hole cavity.
Preferably, a plurality of long-strip-shaped convex strips protruding inwards are arranged inside the blind hole cavity, a matching spigot is arranged at the end part of each convex strip, which is located at the opening of the blind hole cavity, and the first shaft body and the second shaft body are positioned in an interference fit mode through the matching spigot and the annular mounting plate and then are welded into a whole through the circumference.
Preferably, the axial oil path is composed of a first oil path and a second oil path, the first oil path is arranged on the convex strip, the second oil path is arranged on the second shaft body, and the first oil path and the second oil path correspond to each other one to one.
Preferably, the first inner cavity and the second inner cavity constitute an oil storage cavity.
An oil cooling rotor structure comprises the oil cooling hollow rotating shaft structure.
Preferably, the rotating shaft further comprises a first pressing plate, a second pressing plate and a rotor core, wherein the rotating shaft body is installed at the center of the rotor core, the first pressing plate is arranged on one side, close to the first shaft end, of the rotor core, and the second pressing plate is arranged on one side, close to the second shaft end, of the rotor core; a first oil guide groove communicated with the first oil passing hole is formed in the outer side of the first pressure plate, and cooling oil flows into the first oil passing hole from the axial oil path and then flows out of the first oil guide groove; the rotor core is provided with a oil distribution channel, the inner side of the second pressing plate is provided with a connecting oil groove, the connecting oil groove is used for enabling the second oil passing hole to be communicated with the oil distribution channel, the inner side of the first pressing plate is further provided with a second oil guide groove communicated with the oil distribution channel, cooling oil flows into the second oil passing hole from the axial oil path and then flows through the connecting oil groove and the oil distribution channel, and finally flows out from the second oil guide groove.
Preferably, the oil groove is led including the main cell body and the oil outlet that are linked together to the second, the main cell body with divide the oil duct to be linked together, the oil outlet is to outer circumferential edge reason divergence, and each the oil outlet all sets up along clockwise or anticlockwise slope.
The invention has the beneficial effects that:
the hollow rotating shaft structure comprises a first connecting part and a second connecting part, wherein a sealing plug is arranged at the end part of a second shaft body of the second connecting part and used for separating a blind hole cavity and a second inner cavity, so that the first inner cavity and the second inner cavity in the second connecting part form an oil storage cavity; the size of the oil storage cavity can be controlled by adjusting the sectional positions of the first shaft body and the second shaft body, so that different oil supply requirements of the rotor core can be met; the invention has simple structure, easy realization and low cost.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic diagram of a prior art oil-cooled hollow shaft configuration;
FIG. 2 is a schematic view of the structure of the oil-cooled hollow shaft according to the present invention;
FIG. 3 is a perspective view of the first connecting portion of the present invention;
FIG. 4 is a perspective view of a second connecting portion according to the present invention;
FIG. 5 is a schematic view of the oil-cooled rotor configuration of the present invention;
FIG. 6 is a schematic view of a first platen of the present invention.
Labeled as: 1. a first connection portion; 11. a first shaft end; 12. a first shaft body; 13. a blind bore cavity; 14. a convex strip; 15. matching the spigot; 2. a second connecting portion; 21. a second shaft end; 22. a second shaft body; 23. an oil inlet hole; 24. a first lumen; 25. a second lumen; 26. a sealing plug; 27. an annular mounting plate; 3. an axial oil path; 31. a first oil passing hole; 32. a second oil passing hole; 33. a first oil passage; 34. a second oil passage; 4. a first platen; 41. a first oil guide groove; 42. a second oil guide groove; 421. a main trough body; 422. an oil outlet hole; 5. a second platen; 51. connecting the oil groove; 6. a rotor core; 61. and an oil distributing channel.
Detailed Description
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. 2 to 3, an oil-cooled hollow rotating shaft structure, including first connecting portion 1 and second connecting portion 2, first connecting portion 1 includes first axle head 11 and the first axle body 12 that links to each other, second connecting portion 2 includes second axle head 21 and the second axle body 22 that links to each other, the pivot axis body is constituteed to first axle body 12 and second axle body 22 sealing connection, be equipped with the spline on the first axle head 21, be equipped with blind hole chamber 13 in the first connecting portion 1, blind hole chamber 13 is towards one side opening of second connecting portion 2, and blind hole chamber 13 is inside to be equipped with 4 long-strip and inside convex strip 14, the convex strip 14 tip that is located blind hole chamber 13 opening part is equipped with cooperation tang 15.
An oil inlet hole 23 and a first inner cavity 24 which are communicated with each other are arranged in the second shaft end 21, a second inner cavity 25 is arranged in the second shaft body 22, the second inner cavity 25 is communicated with the first inner cavity 24, a sealing plug 26 for separating the blind hole cavity 13 from the second inner cavity 25 is arranged at the end part of the second shaft body 22, the sealing plug 26 is in a bowl shape, an annular mounting plate 27 is further arranged at the end part of the second shaft body 22, the annular mounting plate 27 is inserted into the blind hole cavity 13, the sealing plug 26 is plugged into the annular mounting plate 27, the second inner cavity 25 is sealed and separated from the blind hole cavity 13, and therefore the first inner cavity 24 and the second inner cavity 25 form an oil storage cavity.
The rotating shaft body is provided with an axial oil path 3, the axial oil path 3 is communicated with the second inner cavity 25, the axial oil path 3 is further connected with a first oil passing hole 31 and a second oil passing hole 32, cooling oil flows out of the rotating shaft body through the first oil passing hole 31 and the second oil passing hole 32, the number of the axial oil paths 3 is 4, each axial oil path 3 is composed of a first oil path 33 and a second oil path 34, the first oil path 33 is arranged on the protruding strip 14, the second oil path 34 is arranged on the second shaft body 22, and the first oil paths 33 correspond to the second oil paths 34 one to one.
In the course of working, first connecting portion 1 and second connecting portion 2 can be through forging and pressing shaping, then carry out rough machining, and the first axis body 12 of first connecting portion 1 and the second axis body 22 of second connecting portion 2 are fixed a position through cooperation tang 15 and annular mounting panel 27 interference fit, and each first oil circuit 33 and the location of aiming at one by one of corresponding second oil circuit 34, and the assembly is accomplished the back, then welds into a whole through the circumference, finally carries out the finish machining.
As shown in fig. 5 and 6, an oil-cooled rotor structure includes the oil-cooled hollow rotating shaft structure, and further includes a first pressing plate 4, a second pressing plate 5, and a rotor core 6, wherein a rotating shaft body is installed at the center of the rotor core 6, the first pressing plate 4 is disposed on one side of the rotor core 6 close to a first shaft end 11, and the second pressing plate 5 is disposed on one side of the rotor core 6 close to a second shaft end 21; a first oil guide groove 41 communicated with the first oil passing hole 31 is formed on the outer side of the first pressure plate 4, and cooling oil flows into the first oil passing hole 31 from the axial oil path 3 and then flows out through the first oil guide groove 41; the rotor core 6 is provided with a oil dividing channel 61, the inner side of the second pressing plate 5 is provided with a connecting oil groove 51, the connecting oil groove 51 is used for communicating the second oil passing hole 32 with the oil dividing channel 61, the inner side of the first pressing plate 4 is also provided with a second oil guiding groove 42 communicated with the oil dividing channel 61, and cooling oil flows into the second oil passing hole 32 from the axial oil path 3, then flows through the connecting oil groove 51 and the oil dividing channel 61, and finally flows out through the second oil guiding groove 42. The second oil guide groove 42 comprises a main groove body 421 and oil outlet holes 422 which are communicated, the main groove body 421 is communicated with the oil distributing channel 61, the oil outlet holes 422 are dispersed towards the outer circumferential edge, and each oil outlet hole 422 is obliquely arranged along the clockwise direction or the anticlockwise direction.
In the using process, cooling oil enters from the oil inlet hole 23 of the second shaft end 21, gathers in the oil storage cavity, enters the axial oil path 3 of the rotating shaft body under the action of high-speed centrifugal force, then enters the oil dividing channel 61 after flowing through the connecting oil groove 51 through the second oil passing hole 32, and finally flows out through the second oil guiding groove 42, the oil dividing channel 61 is in the oil path inside the iron core, so that the rotor is cooled, and the other part of the cooling oil enters the first pressure plate 4 through the first oil passing hole 31 and flows out through the first oil guiding groove 41.
According to the invention, on the premise of ensuring the lightweight design of the rotating shaft structure, the aggregation of oil in the hollow rotating shaft structure is effectively reduced, the influence on the dynamic unbalance of the rotor assembly is reduced, and the NVH performance is improved and the torque fluctuation is reduced; the size of the oil storage cavity can be controlled by adjusting the sectional positions of the first shaft body 12 and the second shaft body 22, so that the oil supply requirements of different rotor cores 6 can be met; the invention has simple structure, easy realization and low cost.
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 modifications, equivalents, improvements and the like which are made without departing from the spirit and scope of the present invention shall 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. An oil-cooled hollow rotating shaft structure is characterized by comprising a first connecting part and a second connecting part, wherein the first connecting part comprises a first shaft end and a first shaft body which are connected, the second connecting part comprises a second shaft end and a second shaft body which are connected, the first shaft body and the second shaft body are connected in a sealing manner to form a rotating shaft body, a blind hole cavity is arranged in the first connecting part and faces to an opening on one side of the second connecting part, an oil inlet hole and a first inner cavity which are communicated are arranged in the second shaft end, a second inner cavity is arranged in the second shaft body and is communicated with the first inner cavity, an oil storage cavity is formed by the first inner cavity and the second inner cavity, a sealing plug is arranged at the end part of the second shaft body and is used for separating the blind hole cavity from the second inner cavity, and an axial oil path is arranged on the rotating shaft body, the axial oil path is communicated with the second inner cavity, cooling oil enters from an oil inlet hole at the second shaft end, is gathered in the oil storage cavity and then enters the axial oil path of the rotating shaft body under the action of high-speed centrifugal force, the axial oil path is further connected with a first oil passing hole and a second oil passing hole, and the cooling oil flows out of the rotating shaft body through the first oil passing hole and the second oil passing hole.
2. The oil-cooled hollow rotating shaft structure according to claim 1, wherein an annular mounting plate is arranged at an end of the second shaft body, the annular mounting plate is inserted into the blind hole cavity, the sealing plug is bowl-shaped, and the sealing plug is plugged into the annular mounting plate and hermetically separates the second inner cavity from the blind hole cavity.
3. The oil-cooled hollow rotating shaft structure according to claim 2, wherein a plurality of elongated ribs protruding inward are disposed inside the blind hole cavity, a fitting spigot is disposed at an end of each rib located at the opening of the blind hole cavity, and the first shaft body and the second shaft body are positioned by interference fit of the fitting spigot and the annular mounting plate and then are welded into a whole by circumference.
4. The oil-cooled hollow rotating shaft structure according to claim 3, wherein the axial oil path is composed of a first oil path and a second oil path, the first oil path is disposed on the protruding strip, the second oil path is disposed on the second shaft body, and the first oil path and the second oil path correspond to each other one to one.
5. An oil-cooled rotor structure, characterized by comprising an oil-cooled hollow rotating shaft structure according to any one of claims 1 to 4.
6. The oil-cooled rotor structure according to claim 5, further comprising a first pressing plate, a second pressing plate and a rotor core, wherein the rotating shaft body is installed at the center of the rotor core, the first pressing plate is arranged on one side of the rotor core close to the first shaft end, and the second pressing plate is arranged on one side of the rotor core close to the second shaft end; a first oil guide groove communicated with the first oil passing hole is formed in the outer side of the first pressure plate, and cooling oil flows into the first oil passing hole from the axial oil path and then flows out of the first oil guide groove; the rotor core is provided with a oil distribution channel, the inner side of the second pressing plate is provided with a connecting oil groove, the connecting oil groove is used for enabling the second oil passing hole to be communicated with the oil distribution channel, the inner side of the first pressing plate is further provided with a second oil guide groove communicated with the oil distribution channel, cooling oil flows into the second oil passing hole from the axial oil path and then flows through the connecting oil groove and the oil distribution channel, and finally flows out from the second oil guide groove.
7. The oil-cooled rotor structure of claim 6, wherein the second oil guide groove comprises a main groove body and oil outlet holes which are communicated with each other, the main groove body is communicated with the oil dividing channel, the oil outlet holes are dispersed towards the outer circumferential edge, and each oil outlet hole is obliquely arranged along the clockwise direction or the anticlockwise direction.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110754877.XA CN113572289B (en) | 2021-07-05 | 2021-07-05 | Oil-cooling hollow rotating shaft structure |
| DE112021007923.9T DE112021007923T5 (en) | 2021-07-05 | 2021-10-29 | OIL-COOLED HOLLOW ROTARY SHAFT STRUCTURE AND OIL-COOLED ROTOR STRUCTURE |
| PCT/CN2021/127367 WO2023279591A1 (en) | 2021-07-05 | 2021-10-29 | Oil-cooled hollow rotating shaft structure and oil-cooled rotor structure |
| JP2024500083A JP2024522929A (en) | 2021-07-05 | 2021-10-29 | Oil-cooled hollow shaft structure and oil-cooled rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110754877.XA CN113572289B (en) | 2021-07-05 | 2021-07-05 | Oil-cooling hollow rotating shaft structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113572289A CN113572289A (en) | 2021-10-29 |
| CN113572289B true CN113572289B (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110754877.XA Active CN113572289B (en) | 2021-07-05 | 2021-07-05 | Oil-cooling hollow rotating shaft structure |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2024522929A (en) |
| CN (1) | CN113572289B (en) |
| DE (1) | DE112021007923T5 (en) |
| WO (1) | WO2023279591A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4333267A1 (en) * | 2022-08-29 | 2024-03-06 | Walter Henrich GmbH | Modular rotor shaft with integrated cooling channels |
| DE102022134189A1 (en) * | 2022-12-20 | 2024-06-20 | Valeo Eautomotive Germany Gmbh | Rotor for an electrical machine and electrical machine |
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2021
- 2021-07-05 CN CN202110754877.XA patent/CN113572289B/en active Active
- 2021-10-29 DE DE112021007923.9T patent/DE112021007923T5/en active Pending
- 2021-10-29 WO PCT/CN2021/127367 patent/WO2023279591A1/en active Application Filing
- 2021-10-29 JP JP2024500083A patent/JP2024522929A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| DE112021007923T5 (en) | 2024-04-18 |
| WO2023279591A1 (en) | 2023-01-12 |
| CN113572289A (en) | 2021-10-29 |
| JP2024522929A (en) | 2024-06-21 |
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