CN209881500U - Motor rotor sheath, motor rotor, motor, compressor and electric appliance - Google Patents
Motor rotor sheath, motor rotor, motor, compressor and electric appliance Download PDFInfo
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- CN209881500U CN209881500U CN201920109853.7U CN201920109853U CN209881500U CN 209881500 U CN209881500 U CN 209881500U CN 201920109853 U CN201920109853 U CN 201920109853U CN 209881500 U CN209881500 U CN 209881500U
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Abstract
The utility model belongs to the technical field of the motor, in particular to electric motor rotor sheath, electric motor rotor, motor, compressor and electrical apparatus. The utility model provides a motor rotor sheath, at least comprises a first layer, a second layer and a third layer which are contacted in sequence, wherein, the material of the first layer comprises one or two of carbon fiber or glass fiber; the material of the second layer comprises metal, and the material of the third layer comprises one or two of carbon fiber or glass fiber. Adopt the utility model provides an electric motor rotor sheath can reduce the eddy current loss of rotor and generate heat on the basis of guaranteeing rotor mechanical strength.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to electric motor rotor sheath, electric motor rotor, motor, compressor and electrical apparatus.
Background
The motor is an important component in an industrial system, and the motor with excellent performance is important for the industrial system. Compared with a common rotating speed motor, the high-speed motor has the advantages of high power density and capability of directly driving a high-speed load. The high-speed permanent magnet motor has the advantages of high efficiency, high power factor and the like while having the advantages of the high-speed motor, thereby having wide application prospect.
The rotor of the existing motor needs to be wrapped with a rotor sheath on the outer surface of the rotor to prevent the rotor from flying out or being cracked during operation due to insufficient mechanical strength. The existing sheaths are generally divided into two types, one is made of metal, the heat conductivity is good, the heat dissipation effect of the rotor is good, but the eddy current loss is large; the other is a sheath made of a non-metal material, so that the eddy current loss is small, but the heat dissipation effect is poor.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an electric motor rotor sheath, electric motor rotor, motor, compressor and electrical apparatus to the solution reduces the eddy current loss of rotor and the technical problem who generates heat on the basis of guaranteeing rotor mechanical strength. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to the utility model discloses an aspect provides an electric machine rotor sheath.
In some optional embodiments, the motor rotor sheath at least comprises a first layer, a second layer and a third layer which are contacted in sequence, wherein the material of the first layer comprises one or two of carbon fiber or glass fiber; the material of the second layer comprises metal, and the material of the third layer comprises one or two of carbon fiber or glass fiber. Adopt the embodiment of the utility model provides an electric motor rotor sheath can effectively reduce the eddy current loss of permanent magnet, can guarantee the intensity of permanent magnet simultaneously.
In some optional embodiments, in the electric machine rotor sheath, the second layer is a metal mesh.
In some optional embodiments, in the motor rotor sheath, the second layer is made of copper, or the second layer is made of an alloy containing copper.
In some optional embodiments, in the motor rotor sheath, the thickness of the first layer is 0.5-2mm, or the thickness of the third layer is 0.5-2 mm.
In some optional embodiments, the thickness of the second layer in the motor rotor sheath is 0.1-0.5 mm.
According to a second aspect of the embodiments of the present invention, there is provided an electric machine rotor.
In some alternative embodiments, the electric machine rotor comprises an electric machine rotor sheath as described in any one of the preceding claims.
In some optional embodiments, the motor rotor further comprises a permanent magnet, and the motor rotor sheath is arranged on the surface of the permanent magnet.
According to a third aspect of the embodiments of the present invention, there is provided an electric machine.
In some alternative embodiments, the electric machine comprises an electric machine rotor as defined in any one of the preceding claims.
According to a fourth aspect of the embodiments of the present invention, there is provided a compressor.
In some alternative embodiments, the compressor comprises a motor as previously described.
According to a fifth aspect of the embodiments of the present invention, there is provided an electric appliance.
In some alternative embodiments, the appliance comprises a compressor as previously described.
The embodiment of the utility model provides a technical scheme can include following beneficial effect:
the utility model provides an electric motor rotor sheath includes three layer construction, and is concrete, including the first layer and the third layer of carbon fibre and/or glass fiber material to and, set up the second floor of the metal material between first layer and third layer, guaranteed the mechanical strength of rotor promptly, effectively reduced the loss of vortex again.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram illustrating a structure of a rotor sheath of an electric machine in accordance with an exemplary embodiment.
FIG. 2 is a schematic diagram of a structure of a rotor sheath of an electric machine according to another exemplary embodiment.
FIG. 3 is a schematic diagram of a structure of a rotor sheath of an electric machine according to another exemplary embodiment.
Wherein, 1 first layer, 2 second layer, 3 third layer.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations and positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the 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 therefore should not be construed as limiting the invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.
Herein, the term "plurality" means two or more, unless otherwise specified.
Herein, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B represents: a or B.
Herein, the term "and/or" is an associative relationship describing objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The utility model provides an electric motor rotor sheath.
As shown in fig. 1, the motor rotor sheath provided by the present invention at least comprises a first layer 1, a second layer 2 and a third layer 3 which are contacted in sequence, wherein the material of the first layer comprises one or two of carbon fiber or glass fiber; the second layer is made of metal, and the third layer is made of one or two of carbon fiber or glass fiber.
In the above-described sheath, the material of the first layer may be only carbon fiber, only glass fiber, a mixture of carbon fiber and glass fiber, or a material other than carbon fiber and glass fiber. When the material of the first layer is a mixture of carbon fibers and glass fibers, the mass percentage of the carbon fibers and the glass fibers in the mixture is not particularly limited. Similarly, in the sheath, the material of the second layer may be only carbon fiber, only glass fiber, or a mixture of carbon fiber and glass fiber, or may include other materials besides carbon fiber and glass fiber. When the material of the second layer is a mixture of carbon fibers and glass fibers, the mass percentage of the carbon fibers and the glass fibers in the mixture is not particularly limited. The first layer is made of carbon fiber cloth, the second layer is made of glass fiber cloth, and the third layer is made of carbon fiber cloth and glass fiber cloth.
In the foregoing sheath, the second layer may be made of metal, and further, the second layer may be in a mesh shape.
Further, the embodiment of the utility model provides an electric motor rotor sheath's structure can also be for: the second layer of the jacket is embedded between the first layer and the third layer. The "mosaics" herein can be further described as: dividing the second layer 2 into successive first, second and third portions in thickness, as shown in fig. 2, wherein the first portion is embedded in the first layer 1 of the jacket and the third portion is embedded in the third layer 3 of the jacket, i.e., the second layer "portion" of the jacket is embedded in the first and third layers, where the first, second and third portions may be 1/3 of the thickness of the second layer, respectively; "tessellation" herein may be further described as: the second layer is divided in thickness into a first and a second continuous portion, wherein the first portion is embedded in the first layer of the jacket and the second portion is embedded in the third layer of the jacket, i.e., the second layer of the jacket is "fully" embedded in the first and third layers, as shown in fig. 3, where the first and second portions may be 1/2 times the thickness of the second layer, respectively. The "inlay" method here can adopt current hot dress technique, imbeds the second floor of metal material between first layer and the third layer, and is further, the utility model provides a shape of sheath is circular, and the external diameter of first layer and the internal diameter of third layer can be interference fit.
The embodiment of the utility model provides a do not do specifically and restrict the type of motor, for example can be permanent-magnet machine, and is further, can be the high-speed permanent-magnet machine of surface mounting formula.
Because the mechanical strength of the permanent magnet is insufficient, a rotor sheath needs to be coated outside the surface-mounted high-speed permanent magnet motor to prevent the permanent magnet from flying out or being cracked during operation. Therefore, the rotor of the surface-mounted high-speed permanent magnet motor generally comprises a rotating shaft, a rotor core, a permanent magnet and a rotor sheath from inside to outside. The stator current in the high-speed motor has high fundamental frequency, and the harmonic content is high due to the limited switching frequency of the inverter. The asynchronous rotation of the magnetic field generated by the stator current harmonics relative to the rotor can cause the fluctuation of the magnetic field of the rotor, cause the eddy current loss of the rotor to generate heat, and is particularly serious in high-speed operation. And the high-speed motor rotor is almost in a closed space, the heat dissipation condition is poor, and the heating can cause obvious rotor temperature rise. Rotor overheating easily causes irreversible demagnetization of the permanent magnet, so attention needs to be paid and solved. Existing rotor sheaths are generally classified into two types, conductive metallic materials and non-conductive non-metallic materials. When the rotor sheath is made of metal materials, the heat conductivity is good, the heat dissipation effect of the rotor is good, but the electric conductivity is high, and the eddy current loss is large; when the rotor sheath is made of non-metallic materials, the electric conductivity is small, the eddy current loss is small, but the heat conductivity is poor, and the heat dissipation effect is also poor. Therefore, the temperature rise problem of the rotor cannot be solved from the two aspects of heat generation inhibition and heat dissipation improvement at the same time no matter the rotor sheath made of metal or non-metal materials is adopted.
The utility model discloses a include the sheath of carbon fibre and/or glass fiber's non-metal layer and metal level simultaneously, effectively reduced the eddy current loss of permanent magnet machine's permanent magnet, can protect the mechanical strength of permanent magnet simultaneously. Furthermore, inlay the second floor of metal material to first floor and third layer, the eddy current loss of permanent magnet motor's permanent magnet can more effectual reduction, simultaneously, can further guarantee the mechanical strength of permanent magnet.
In order to better enable the second layer made of metal materials to be embedded between the first layer and the third layer, the tightness of connection among the first layer, the second layer and the third layer of the sheath is improved, and then the effects of reducing the eddy current loss of the motor and ensuring the mechanical strength of a motor rotor are better exerted, the second layer in the sheath is of a metal mesh structure. Furthermore, when inlaying metal mesh structure's second floor in first floor and third floor, the space of metal mesh can be passed with the partial material of metal mesh contact in the first floor, tightly wrap up the metal mesh, realize the close integration of first floor and second floor, it is similar, the space of metal mesh can be passed with the partial material of metal mesh contact in the third floor, tightly wrap up the metal mesh, realize the close integration of third floor and second floor, simultaneously, the second floor of metal material is inlayed between first floor and third floor, the radiating effect of first floor and third floor has been increased. Further, the aforementioned carbon fibers and glass fibers have a particle size smaller than the pore size of the metal mesh, so that the individual glass fibers and carbon fibers can pass through the pores of the metal mesh. Further, in order to improve the strength of the carbon fibers and the glass fibers and the uniformity through the metal mesh, the particle diameters of the carbon fibers and the glass fibers may be in the order of nanometers.
The total eddy current loss of rotor is reduced for the penetration of better shielding stator current harmonic magnetic field, the utility model discloses the material of second layer that the embodiment provided can be copper, perhaps, also can be for including the alloy of copper.
The embodiment of the utility model provides a thickness of the second layer of sheath is 0.1-0.5 mm.
In this embodiment, in order to better ensure the mechanical strength of the rotor, the thickness of the second layer of the sheath should not be less than 0.1mm, and in order to prevent the eddy current loss of the metal layer from increasing and causing the rotor to overheat, the thickness of the second layer should not be greater than 0.5 mm.
The embodiment of the utility model provides a thickness of the first layer of sheath is 0.5-2 mm.
In this embodiment, for the mechanical strength of better assurance rotor, the thickness of the first layer of sheath should not be less than 0.5mm, and for the radiating effect who improves the sheath, the thickness of the first layer of sheath should not be greater than 2mm, and is similar, and for the mechanical strength of better assurance rotor, the thickness of the third layer of sheath should not be less than 0.5mm, and for the radiating effect who improves the sheath, the thickness of the third layer of sheath should not be greater than 2 mm.
The embodiment of the utility model provides a provide a machine rotor that includes the electric motor rotor sheath of aforementioned arbitrary one simultaneously, it is further, electric motor rotor can also include the permanent magnet, and electric motor rotor sheath overlaps in the surface of permanent magnet, and the combination mode of electric motor rotor sheath and the surface of permanent magnet can be interference fit. The first layer of the electric machine rotor sheath in direct contact with the permanent magnets may be the electric machine rotor sheath.
The embodiment of the utility model provides a motor that includes aforementioned electric motor rotor is provided simultaneously.
The embodiment of the utility model provides a compressor that includes aforementioned motor is provided simultaneously.
The embodiment of the utility model provides a provide an electrical apparatus that includes aforementioned compressor simultaneously. The utility model discloses do not do specifically and restrict the kind of electrical apparatus, can be domestic appliance, for example, air conditioner, refrigerator etc..
The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (10)
1. A motor rotor sheath is characterized in that,
the sheath at least comprises a first layer, a second layer and a third layer which are contacted in sequence,
the first layer is made of one of carbon fiber or glass fiber, the carbon fiber is made of carbon fiber cloth, and the glass fiber is made of glass fiber cloth;
the material of the second layer comprises a metal,
the third layer is made of one of carbon fiber or glass fiber, the carbon fiber is made of carbon fiber cloth, and the glass fiber is made of glass fiber cloth.
2. The electric machine rotor sheath of claim 1,
the second layer is a metal mesh.
3. The electric machine rotor sheath of claim 1,
the material of the second layer is copper,
alternatively, the first and second electrodes may be,
the second layer is made of an alloy containing copper.
4. The electric machine rotor sheath of claim 1,
the thickness of the first layer is 0.5-2mm,
alternatively, the first and second electrodes may be,
the thickness of the third layer is 0.5-2 mm.
5. The electric machine rotor sheath of claim 1,
the thickness of the second layer is 0.1-0.5 mm.
6. An electric machine rotor, characterized in that it comprises an electric machine rotor sheath according to any of claims 1-5.
7. The electric machine rotor as recited in claim 6, further comprising permanent magnets, wherein the electric machine rotor sheath is disposed on surfaces of the permanent magnets.
8. A motor is characterized in that a motor is provided,
comprising an electric machine rotor as claimed in claim 6 or 7.
9. A compressor, characterized by comprising an electric machine according to claim 8.
10. An electrical appliance comprising a compressor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920109853.7U CN209881500U (en) | 2019-01-22 | 2019-01-22 | Motor rotor sheath, motor rotor, motor, compressor and electric appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920109853.7U CN209881500U (en) | 2019-01-22 | 2019-01-22 | Motor rotor sheath, motor rotor, motor, compressor and electric appliance |
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| CN209881500U true CN209881500U (en) | 2019-12-31 |
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| CN201920109853.7U Active CN209881500U (en) | 2019-01-22 | 2019-01-22 | Motor rotor sheath, motor rotor, motor, compressor and electric appliance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115189496A (en) * | 2022-09-08 | 2022-10-14 | 北京伯肯当代氢燃料电池实验室有限公司 | Superspeed rotor and superspeed hydrogen circulating pump |
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2019
- 2019-01-22 CN CN201920109853.7U patent/CN209881500U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115189496A (en) * | 2022-09-08 | 2022-10-14 | 北京伯肯当代氢燃料电池实验室有限公司 | Superspeed rotor and superspeed hydrogen circulating pump |
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