CN113364182B - Rotor sleeve, rotor assembly, motor, compressor - Google Patents
Rotor sleeve, rotor assembly, motor, compressor Download PDFInfo
- Publication number
- CN113364182B CN113364182B CN202110774458.2A CN202110774458A CN113364182B CN 113364182 B CN113364182 B CN 113364182B CN 202110774458 A CN202110774458 A CN 202110774458A CN 113364182 B CN113364182 B CN 113364182B
- Authority
- CN
- China
- Prior art keywords
- rotor
- sheath
- thread
- jacket
- grooves
- 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.)
- Active
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- H02K1/27—Rotor cores with permanent magnets
-
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides a rotor sheath, a rotor assembly, a motor and a compressor, wherein the rotor sheath comprises an inner sheath and an outer sheath, a first thread is formed on the outer peripheral wall of the inner sheath, a second thread is formed on the inner hole wall of the outer sheath, and the outer sheath is detachably connected to the outer peripheral side of the inner sheath through the first thread and the second thread. According to the invention, the inner sheath is in threaded connection with the outer sheath, and the inner sheath and the outer sheath are not required to be assembled in a shrink fit manner, so that the assembling difficulty of the rotor sheath is greatly reduced, the assembling efficiency is improved, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of motor manufacturing, and particularly relates to a rotor sheath, a rotor assembly, a motor and a compressor.
Background
The high-speed permanent magnet synchronous motor has the advantages of high power density, reliable operation, high efficiency and the like, so that the high-speed permanent magnet synchronous motor is widely applied to various fields such as industrial production, daily life and the like. However, the problem of temperature rise of the motor is always a difficult point in the industry, the service performance and service life of the motor are directly determined, the motor is extremely easy to damage due to the fact that the temperature rise is too high, and particularly for a high-speed permanent magnet motor, because the stator current harmonic magnetic field can generate larger eddy current loss on the surfaces of a metal sheath and a permanent magnet so as to generate heat, the rotor runs at a higher temperature, and irreversible demagnetization of the permanent magnet is easily caused. Thus, there is a strong need for a method or structure to reduce the temperature rise of permanent magnets.
In the prior art, the structure of the metal sheath is improved and optimized to be expected to reduce the temperature rise of the motor rotor to a certain extent, for example, one implementation mode is to improve the integrated rotor sheath (based on the requirement of mechanical strength, generally the metal sheath) in the prior art into a mode of interference assembly of the inner sheath and the outer sheath, and the assembly process of the rotor sheath is complex.
Disclosure of Invention
Therefore, the invention provides the rotor sheath, the rotor assembly, the motor and the compressor, which can overcome the defect of complex interference fit sleeving technology between the inner sheath and the outer sheath of the rotor sheath in the related technology.
In order to solve the problems, the invention provides a rotor sheath, which comprises an inner sheath and an outer sheath, wherein a first thread is formed on the outer peripheral wall of the inner sheath, a second thread is formed on the inner hole wall of the outer sheath, and the outer sheath is detachably connected to the outer peripheral side of the inner sheath through the first thread and the second thread.
Preferably, the first thread is provided with a plurality of first grooves penetrating along the axial direction of the inner sheath, the second thread is provided with a plurality of second grooves penetrating along the axial direction of the outer sheath, and when the first thread and the second thread are screwed to preset positions, the first grooves and the second grooves respectively penetrate along the axial direction of the rotor sheath in a one-to-one correspondence manner so as to jointly form a plurality of cooling flow passages.
Preferably, the notch of the first groove faces one side of the outer sheath, the notch of the second groove faces one side of the inner sheath, and/or a plurality of first grooves are uniformly arranged at intervals along the circumferential direction of the inner sheath.
Preferably, the material of the inner sheath is a non-magnetic conductive metal material.
The invention also provides a rotor assembly, which comprises a rotating shaft and a permanent magnet sleeved on the outer peripheral side of the rotating shaft, wherein the outer peripheral side of the permanent magnet is also sleeved with the rotor sheath.
Preferably, the rotor assembly further comprises two heat conducting plates, wherein the two heat conducting plates are respectively arranged at two axial ends of the permanent magnet and are in contact with the axial ends of the permanent magnet.
Preferably, the heat conducting plate is provided with a plurality of through holes penetrating through two end surfaces of the heat conducting plate, the through holes are respectively arranged in one-to-one correspondence with the cooling flow passages, or the rotor sheath is clamped between the two heat conducting plates.
Preferably, the heat conducting plate is sleeved on the rotating shaft in an interference manner, and/or the rotor sheath is sleeved on the outer peripheral side of the permanent magnet in an interference manner.
The invention also provides a motor, which comprises the rotor assembly.
The invention also provides a compressor comprising the motor.
According to the rotor sheath, the rotor assembly, the motor and the compressor, the inner sheath is in threaded connection with the outer sheath, and the inner sheath and the outer sheath are not required to be assembled in a shrink fit mode, so that the assembling difficulty of the rotor sheath is greatly reduced, the assembling efficiency is improved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic view (radial plane projection) of a rotor jacket according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of the inner sheath of FIG. 1;
FIG. 3 is a schematic perspective view of the outer sheath of FIG. 1;
FIG. 4 is a schematic view (in cross section) of a rotor assembly according to another embodiment of the present invention;
fig. 5 is a partial enlarged view at a in fig. 4.
The reference numerals are expressed as:
1. Rotor sheath, 11, inner sheath, 111, first screw thread, 112, first groove, 12, outer sheath, 121, second screw thread, 122, second groove, 2, cooling flow channel, 100, rotating shaft, 101, permanent magnet, 102, heat conducting plate, 1021, through hole.
Detailed Description
Referring to fig. 1 to 5 in combination, according to an embodiment of the present invention, there is provided a rotor cover including an inner cover 11, an outer cover 12, a first screw thread 111 formed on an outer circumferential wall of the inner cover 11, and a second screw thread 121 formed on an inner wall of the outer cover 12, the outer cover 12 being detachably connected to an outer circumferential side of the inner cover 11, that is, screw-connected between the outer cover 12 and the inner cover 11, through the first screw thread 111 and the second screw thread 121. In this technical scheme, inner sheath 11 with threaded connection between the oversheath 12 need not to assemble with hot jacket interference fit's mode through the inner and outer sheath, thereby greatly reduced the equipment degree of difficulty of rotor sheath is favorable to improving packaging efficiency, reduction in production cost.
In some embodiments, the first thread 111 is provided with a plurality of first grooves 112 penetrating along the axial direction of the inner sheath 11, the second thread 121 is provided with a plurality of second grooves 122 penetrating along the axial direction of the outer sheath 12, and when the first thread 111 and the second thread 121 are screwed to a preset position (i.e. when the shaft ends of the inner sheath 11 and the outer sheath 12 are flush), the plurality of first grooves 112 and the plurality of second grooves 122 respectively penetrate along the axial direction of the rotor sheath one by one to form a plurality of cooling flow passages 2 together. In this technical scheme, through a plurality of corresponding settings of first recess 112, second recess 122, thereby can be in after inner sheath 11 and oversheath 12 spin are as an organic whole, naturally form a plurality of cooling runner 2, cooling runner 2 can supply the circulation of cooling medium (for example refrigerant) and then realize realizing high-efficient cooling to corresponding rotor subassembly. It should be noted that, the cooling flow channel 2 in this technical solution is formed by corresponding through of the corresponding groove, which is simpler to implement than the mode of mold opening pouring or separate processing in the related art.
Preferably, the notch of the first groove 112 is directed to one side of the outer sheath 12, and the notch of the second groove 122 is directed to one side of the inner sheath 11. It will be appreciated that the first groove 112 will divide the first thread 11 into a plurality of thread segments and that the second groove 122 will divide the second thread 12 into a plurality of thread segments. Preferably, the groove depth of the first groove 12 is consistent with the thread height of the thread of the first thread 11, and the groove depth of the second groove 122 is consistent with the thread height of the thread of the second thread 12, so that the thickness design of the corresponding sheath can be ensured to be reduced.
In some embodiments, the plurality of first grooves 112 are uniformly spaced along the circumference of the inner sheath 11, and the corresponding second grooves 122 are uniformly spaced along the circumference of the outer sheath 12, so that the heat dissipation of the rotor sheath in the circumferential direction is more uniform.
In some embodiments, the material of the inner sheath 11 is a non-magnetic metal material, such as copper, aluminum, etc.
According to an embodiment of the present invention, there is further provided a rotor assembly, including a rotating shaft 100 and a permanent magnet 101 sleeved on an outer peripheral side of the rotating shaft 100, wherein the outer peripheral side of the permanent magnet 101 is further sleeved with the rotor sheath 1. Further, the rotor assembly further includes two heat conductive plates 102, where the two heat conductive plates 102 are respectively disposed at two axial ends of the permanent magnet 101 and contact with the axial ends of the permanent magnet 101, so as to accelerate heat transfer of the permanent magnet 101 along the axial direction of the rotating shaft 100 to the heat conductive plates 102 at two sides, and further reduce temperature rise of the rotor. It will be appreciated that the material of the heat conductive plate 102 should be a metal material with a high thermal conductivity and non-magnetic conductivity, such as copper, aluminum, etc.
In some embodiments, the heat-conducting plate 102 is configured with a plurality of through-holes 1021 penetrating through two end surfaces thereof, and the plurality of through-holes 1021 are respectively arranged in one-to-one correspondence with the plurality of cooling channels 2, so that the cooling medium can flow into or out of the cooling channels 2 through the through-holes 1021.
In some embodiments, the heat conducting plates 102 are in interference fit with the rotating shaft 100, and/or the rotor sheath 1 is in interference fit with the outer circumference of the permanent magnet 101, at this time, the rotor sheath 1 is sandwiched between the two heat conducting plates 102, and two axial ends of the rotor sheath are in contact fit with the heat conducting plates 102 without providing a separate connection structure, so that the structure of the rotor assembly is more simplified, and meanwhile, dynamic balance of the rotor assembly is also guaranteed.
According to an embodiment of the present invention, there is also provided an electric machine including the rotor assembly described above.
According to an embodiment of the present invention, there is also provided a compressor including the above motor.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. The rotor jacket is characterized by comprising an inner jacket (11) and an outer jacket (12), wherein a first thread (111) is formed in the outer peripheral wall of the inner jacket (11), a second thread (121) is formed in the inner hole wall of the outer jacket (12), the outer jacket (12) is detachably connected to the outer peripheral side of the inner jacket (11) through the first thread (111) and the second thread (121), a plurality of first grooves (112) penetrating along the axial direction of the inner jacket (11) are formed in the first thread (111), a plurality of second grooves (122) penetrating along the axial direction of the outer jacket (12) are formed in the second thread (121), and when the first thread (111) and the second thread (121) are screwed to preset positions, the first grooves (112) and the second grooves (122) are respectively and correspondingly penetrated along the axial direction of the rotor jacket so as to form a plurality of cooling flow channels (2) together.
2. Rotor jacket according to claim 1, characterized in that the notches of the first grooves (112) are directed to one side of the outer jacket (12), the notches of the second grooves (122) are directed to one side of the inner jacket (11), and/or that a plurality of the first grooves (112) are arranged at uniform intervals in the circumferential direction of the inner jacket (11).
3. Rotor sheath according to claim 1, characterized in that the material of the inner sheath (11) is a non-magnetically conductive metal material.
4. A rotor assembly comprising a rotating shaft (100) and a permanent magnet (101) fitted around the outer circumferential side of the rotating shaft (100), characterized in that the outer circumferential side of the permanent magnet (101) is further fitted with a rotor sheath according to any one of claims 2 to 3.
5. The rotor assembly according to claim 4, further comprising two heat conductive plates (102), the two heat conductive plates (102) being disposed at axial ends of the permanent magnet (101) and in contact with axial ends of the permanent magnet (101), respectively.
6. The rotor assembly according to claim 5, wherein the heat conducting plate (102) is provided with a plurality of through holes (1021) penetrating through two end surfaces thereof, the through holes (1021) are respectively arranged in one-to-one correspondence with the cooling flow passages (2), or the rotor sheath (1) is clamped between the two heat conducting plates (102).
7. The rotor assembly according to claim 5, wherein the heat conducting plate (102) is shrink-fitted over the rotating shaft (100), and/or the rotor sheath (1) is shrink-fitted over the outer peripheral side of the permanent magnet (101).
8. An electric machine comprising a rotor assembly, characterized in that the rotor assembly is a rotor assembly according to any one of claims 5 to 7.
9. A compressor comprising an electric motor, wherein the electric motor is the electric motor of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774458.2A CN113364182B (en) | 2021-07-08 | 2021-07-08 | Rotor sleeve, rotor assembly, motor, compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774458.2A CN113364182B (en) | 2021-07-08 | 2021-07-08 | Rotor sleeve, rotor assembly, motor, compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113364182A CN113364182A (en) | 2021-09-07 |
| CN113364182B true CN113364182B (en) | 2025-02-18 |
Family
ID=77538758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110774458.2A Active CN113364182B (en) | 2021-07-08 | 2021-07-08 | Rotor sleeve, rotor assembly, motor, compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113364182B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116760209A (en) * | 2023-05-31 | 2023-09-15 | 哈尔滨理工大学 | Submerged low-temperature high-speed motor with low temperature rise |
| CN118017740B (en) * | 2024-04-09 | 2024-07-19 | 江苏海拓宾未来工业科技集团有限公司 | An ultra-high-speed permanent magnet motor for a pure oil-free high-speed compressor and its manufacturing process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831047A (en) * | 2019-01-22 | 2019-05-31 | 天津大学 | A kind of high-intensity high-speed rotor structure for permanent magnet motor |
| CN213341790U (en) * | 2020-10-31 | 2021-06-01 | 宝鸡市聚鑫源新材料股份有限公司 | TC4 titanium alloy high-speed rotor sheath |
| CN215186140U (en) * | 2021-07-08 | 2021-12-14 | 珠海格力电器股份有限公司 | Rotor jackets, rotor assemblies, motors, compressors |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3422743A1 (en) * | 1984-06-19 | 1985-12-19 | Ebm Elektrobau Mulfingen Gmbh & Co, 7119 Mulfingen | EXTERNAL ROTOR MOTOR WITH SCREW-IN MOTOR FLANGE |
| US8183723B2 (en) * | 2007-07-03 | 2012-05-22 | Caterpillar Inc. | Cooling jacket and stator assembly for rotary electric device |
| CN106787512B (en) * | 2016-12-26 | 2019-01-29 | 株洲九方装备股份有限公司 | A kind of accurate positioning method and device of the processing of permanent magnetism shaft |
| CN108988534B (en) * | 2018-08-20 | 2020-06-19 | 中车永济电机有限公司 | High-speed permanent magnet motor rotor and processing method thereof |
| CN213585436U (en) * | 2020-11-20 | 2021-06-29 | 蜂巢蔚领动力科技(江苏)有限公司 | A high-speed motor rotor shaft structure |
-
2021
- 2021-07-08 CN CN202110774458.2A patent/CN113364182B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831047A (en) * | 2019-01-22 | 2019-05-31 | 天津大学 | A kind of high-intensity high-speed rotor structure for permanent magnet motor |
| CN213341790U (en) * | 2020-10-31 | 2021-06-01 | 宝鸡市聚鑫源新材料股份有限公司 | TC4 titanium alloy high-speed rotor sheath |
| CN215186140U (en) * | 2021-07-08 | 2021-12-14 | 珠海格力电器股份有限公司 | Rotor jackets, rotor assemblies, motors, compressors |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113364182A (en) | 2021-09-07 |
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