CN218498899U - Rotor structure of high-speed permanent magnet motor and motor thereof - Google Patents
Rotor structure of high-speed permanent magnet motor and motor thereof Download PDFInfo
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- CN218498899U CN218498899U CN202222139554.2U CN202222139554U CN218498899U CN 218498899 U CN218498899 U CN 218498899U CN 202222139554 U CN202222139554 U CN 202222139554U CN 218498899 U CN218498899 U CN 218498899U
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Abstract
A rotor structure of a high-speed permanent magnet motor and the motor thereof are provided, the rotor structure comprises: the magnetic steel assembly comprises magnetic steel, a magnetism isolating ring and a rotor protective sleeve; the magnetic steel component is sleeved on the rotating shaft; the magnetic steel components are arranged in more than two sets, magnetic steel sleeves are arranged on the rotating shaft, magnetic isolation rings are sleeved on the rotating shaft, and a rotor is sleeved on the magnetic steel. The utility model discloses a make magnet steel assembly wholly carry out segmentation design, can reduce rotor protective sheath assembly process degree of difficulty in the rotor subassembly by a wide margin under the prerequisite that does not sacrifice the magnet steel total length, improve and assemble the yields; due to the increase of the end effect, under the same interference design, the protective pressure of the rotor protective sleeve on the magnetic steel can be improved, so that the motor can operate at higher rotating speed, and the motor efficiency is improved; because the magnetic steel assembly is axially segmented, the induced eddy current loop of the rotor is axially split, the eddy current loss of the rotor is reduced, and the temperature of the rotor is reduced.
Description
Technical Field
The utility model relates to a design and research and development of motor especially relate to a high-speed permanent-magnet machine's rotor structure and motor thereof.
Background
The high-speed permanent magnet motor has high running speed, and a rotor protective sleeve is required to be arranged on the outer side of the magnetic steel to avoid the magnetic steel from breaking due to centrifugal force at high rotating speed. The structure of the existing high-speed permanent magnet motor rotor assembly is shown in figure 1, clearance fit is adopted between a magnetic steel 3 and a rotating shaft 1, two ends of the magnetic steel 3 are respectively provided with a magnetism isolating ring 2, interference fit is adopted between the magnetism isolating ring 2 and the rotating shaft 1, interference fit is adopted between a rotor protective sleeve 4 and the magnetic steel 3, and the design of interference magnitude ensures that the rotor protective sleeve still can provide enough protective pressure for the magnetic steel under the high-speed high-temperature working condition of the rotor assembly, so that the magnetic steel is not broken.
And assembling the rotor protective sleeve by using a hot sleeve process, firstly heating the rotor protective sleeve to enlarge the inner diameter of the rotor protective sleeve, and then sleeving the rotor protective sleeve subjected to heating expansion on the magnetic steel. In the assembling process, the temperature of the rotor protective sleeve can be reduced at the highest speed, and the rotor protective sleeve can be clamped on the magnetic steel after the temperature is reduced to a certain temperature.
When the length of the magnetic steel component is longer (for example, more than 150 mm), the whole magnetic steel component is designed in the prior art, and when the rotor protection sleeve is assembled in a hot sleeve process, the whole rotor component is easily clamped to half, so that the whole rotor component is scrapped.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-speed permanent-magnet machine's rotor structure and motor to solve the technical problem who exists among the prior art.
A rotor structure for a high-speed permanent magnet electric machine, comprising:
the magnetic steel assembly comprises magnetic steel, a magnetism isolating ring and a rotor protective sleeve;
the magnetic steel component is sleeved on the rotating shaft;
the magnetic steel assembly is provided with more than two sets, the magnetic steel sleeve is arranged on the rotating shaft, the magnetism isolating ring is sleeved on the rotating shaft, and the rotor protective sleeve is arranged on the magnetic steel.
In the scheme, when the magnetic steel component is designed to be longer (for example, more than 150 mm), the magnetic steel component is integrally designed in a segmented manner, so that the difficulty of the assembly process of the rotor protective sleeve in the rotor component can be greatly reduced on the premise of not sacrificing the total length of the magnetic steel, and the assembly yield is improved; due to the sectional design of the magnetic steel component, due to the increase of the end effect, under the same interference design, the protective pressure of the rotor protective sleeve on the magnetic steel can be improved, so that the rotor protective sleeve can operate at higher rotating speed, and the motor efficiency is improved; the sectional design of the magnetic steel component is realized, and the magnetic steel component is axially segmented, so that an induced eddy current loop of the rotor is axially split, the eddy current loss of the rotor is reduced, the temperature of the rotor is reduced, and a larger margin is reserved for the design of a motor.
The utility model discloses a further scheme in, separate the magnetic ring with be interference fit between the pivot, the magnet steel with be clearance fit between the pivot, the rotor protection cover with be interference fit between the magnet steel.
The utility model discloses an in the further scheme, the rotor protective sheath is circular protective sheath, be equipped with the thread groove on the outer wall of rotor protective sheath.
In this scheme, compare smooth rotor protective sheath in surface, open the helicla flute in the surface and can cut the response vortex loop on rotor protective sheath surface, reduce rotor loss power by a wide margin (reduction amplitude is relevant with the axial distance in adjacent groove, and axial distance is shorter, and loss power is less), reduced the loss power that generates heat in the source. The surface of the rotor protective sleeve is grooved, so that the surface area of the rotor protective sleeve is increased, the convective heat dissipation power of the rotor protective sleeve is also increased, and the temperature of the rotor is reduced. When the motor rotates, the one-way thread groove on the surface of the rotor protective sleeve forms an axial flow guide channel on the surface of the protective sleeve, so that the convection heat dissipation power of the motor is increased, and the temperature of the rotor is reduced.
In a further aspect of the present invention, the notch shape of the thread groove is any one of a rectangle, a groove triangular groove, and an elliptical groove.
In a further aspect of the present invention, the thread groove is a single thread groove or a multi-thread groove.
The utility model discloses a in the further scheme, it is a plurality of among the magnetic steel assembly separate the magnetic ring and compare the magnet steel is more one, separate the magnetic ring and be used for keeping apart magnet steel among the magnetic steel assembly.
The utility model discloses the second aspect provides a motor, the motor includes the utility model discloses the second aspect provides a high-speed permanent-magnet machine's rotor structure.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a make magnet steel assembly wholly carry out segmentation design, can reduce rotor protective sheath assembly process degree of difficulty in the rotor subassembly by a wide margin under the prerequisite that does not sacrifice the magnet steel total length, improve and assemble the yields;
due to the sectional design of the magnetic steel assembly, the protection pressure of the rotor protective sleeve on the magnetic steel can be improved under the same interference design due to the increase of the end effect, so that the rotor protective sleeve can operate at a higher rotating speed, and the motor efficiency is improved;
the sectional design of the magnetic steel component is realized, and the magnetic steel component is axially segmented, so that an induced eddy current loop of the rotor is axially split, the eddy current loss of the rotor is reduced, the temperature of the rotor is reduced, and a larger margin is reserved for the design of a motor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a rotor structure in the prior art.
Fig. 2 is a schematic structural diagram of a rotor structure of a high-speed permanent magnet motor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rotor structure of a high-speed permanent magnet motor according to an embodiment of the present invention, when there are 3 magnetic steel assemblies;
fig. 4 is a schematic structural view of a protective sheath according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a motor according to an embodiment of the present invention.
Reference numerals
1. A rotating shaft; 2. A magnetism isolating ring;
3. magnetic steel; 4. A rotor protection sleeve;
5. a thread groove; 100. A motor;
200. rotor structure of high-speed permanent-magnet machine.
Detailed Description
In order to make the above and other features and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings. It is understood that the specific embodiments described herein are for purposes of illustration only and are not intended to be limiting, as those of ordinary skill in the art will recognize.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It should be noted that the utility model is directed to magnet steel 3/rotor protective sheath 4 designs longer (for example > 150 mm) rotor structure, when magnet steel 3/rotor protective sheath 4 is shorter (for example < 100 mm), it is feasible on assembly process to adopt monoblock magnet steel 3/rotor protective sheath 4 (n = 1), adopts the design of axial sectional type to increase assembly process step on the contrary, when magnet steel 3/rotor protective sheath 4 is longer (for example > 150 mm), adopts the utility model provides a scheme.
Referring to fig. 2, a rotor structure 200 of a high-speed permanent magnet motor includes:
the magnetic steel component comprises magnetic steel 3, a magnetism isolating ring 2 and a rotor protective sleeve 4;
the magnetic steel component is sleeved on the rotating shaft 1;
the magnetic steel component is provided with more than two sets, the magnetic steel 3 is sleeved on the rotating shaft 1, the magnetism isolating ring 2 is sleeved on the rotating shaft 1, and the rotor protective sleeve 4 is arranged on the magnetic steel 3.
In the scheme, the magnetic steel 3/the rotor protective sleeve 4 is designed to be longer (for example, more than 150 mm), so that the magnetic steel assembly is integrally designed in a segmented manner, the difficulty of the assembly process of the rotor protective sleeve 4 in the rotor assembly can be greatly reduced on the premise of not sacrificing the total length of the magnetic steel 3, and the assembly yield is improved; due to the sectional design of the magnetic steel assembly, due to the increase of the end effect, the protection pressure of the rotor protective sleeve 4 on the magnetic steel 3 can be improved under the same interference design, so that the motor can operate at a higher rotating speed, and the efficiency of the motor 100 is improved; the sectional design of the magnetic steel component, because the magnetic steel 3/the rotor protective sleeve 4 is axially segmented, the induction eddy current loop of the rotor is axially split, the eddy current loss of the rotor is reduced, the temperature of the rotor is reduced, and more allowance is left for the design of the motor 100.
In a further aspect of the present invention, the magnetic isolation ring 2 is in interference fit with the rotating shaft 1, the magnetic steel 3 is in clearance fit with the rotating shaft 1, and the rotor protection sleeve 4 is in interference fit with the magnetic steel 3.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a protective sheath according to an embodiment of the present invention, in a further aspect of the present invention, the rotor protective sheath 4 is a circular protective sheath, and a thread groove 5 is provided on an outer wall of the rotor protective sheath 4.
In this scheme, compare smooth rotor protective sheath 4 in surface, open the helicla flute in the surface and can cut the response eddy current loop on rotor protective sheath 4 surface, reduce rotor loss power by a wide margin (reduction amplitude is relevant with the axial distance in adjacent groove, and axial distance is shorter, and loss power is less), reduced the loss power that generates heat in the source. The rotor protection sleeve 4 is provided with grooves on the surface, so that the surface area of the rotor protection sleeve is increased, the convective heat dissipation power of the rotor protection sleeve is also increased, and the temperature of the rotor is reduced. When the rotor structure in the motor 100 rotates, the one-way thread groove 5 on the surface of the rotor protection sleeve 4 forms an axial flow guide channel on the surface of the protection sleeve, which increases the convection heat dissipation power and reduces the temperature of the rotor.
In a further aspect of the present invention, the notch shape of the thread groove 5 is any one of a rectangle, a groove triangular groove, and an elliptical groove.
In a further aspect of the present invention, the thread groove 5 is a single thread groove 5 or a multi-thread groove 5.
To thread groove 5, the utility model also provides an alternative scheme, be about to thread groove 5 substitution design becomes parallel radial groove.
The utility model discloses a further scheme in, it is a plurality of among the magnet steel assembly separate magnetic ring 2 than 3 more one magnet steels, separate magnetic ring 2 and be used for keeping apart magnet steel 3 among the magnet steel assembly.
The utility model discloses the second aspect provides a motor 100, motor 100 includes the utility model discloses the second aspect provides a high-speed permanent-magnet machine's rotor structure 200.
The utility model discloses an assembly process as follows:
fixing the rotating shaft 1, and pushing the magnetism isolating ring 2 to a designed position by using a hydraulic method;
placing the magnetic steel 3 at a design position;
heating the rotor protection sleeve 4 and pushing to a designed position (completely coating the magnetic steel 31);
repeating the steps 1-3 for n times until all the rotor assemblies are installed.
Further, it should be understood by those skilled in the art that if the rotor structure 200 of the high-speed permanent magnet motor and the motor 100 thereof provided by the embodiments of the present invention are combined and replaced by fusing, simple changing, mutual changing, etc., all or part of the related sub-modules are replaced, for example, each component is placed at a moving position; or the products formed by the components are integrally arranged; or a detachable design; any combined component can form a device/apparatus/system with specific function, and such a device/apparatus/system is used to replace the corresponding component in the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (7)
1. A rotor structure of a high-speed permanent magnet motor, comprising:
the magnetic steel assembly comprises magnetic steel, a magnetism isolating ring and a rotor protective sleeve;
the magnetic steel component is sleeved on the rotating shaft;
the magnetic steel assembly is provided with more than two sets, the magnetic steel sleeve is arranged on the rotating shaft, the magnetism isolating ring is sleeved on the rotating shaft, and the rotor protective sleeve is arranged on the magnetic steel.
2. The rotor structure of high-speed permanent magnet motor according to claim 1, wherein said magnetism isolating ring is in interference fit with said rotating shaft, said magnetic steel is in clearance fit with said rotating shaft, and said rotor protection sleeve is in interference fit with said magnetic steel.
3. The rotor structure of high-speed permanent magnet motor according to claim 1, wherein the rotor protection sleeve is a circular protection sleeve, and the outer wall of the rotor protection sleeve is provided with a thread groove.
4. The rotor structure of high-speed permanent magnet motor according to claim 3, wherein the shape of the notch of the thread groove is any one of a rectangle, a triangular groove or an elliptical groove.
5. The rotor structure of high-speed permanent magnet motor according to claim 3, wherein said thread groove is a single thread groove or a multi-thread groove.
6. The rotor structure of claim 1, wherein the number of the magnetic isolation rings in the magnetic steel assemblies is one more than that of the magnetic steels, and the magnetic isolation rings are used for isolating the magnetic steels in the magnetic steel assemblies.
7. An electric machine characterized by: the machine comprises a rotor structure of a high speed permanent magnet machine according to any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222139554.2U CN218498899U (en) | 2022-08-15 | 2022-08-15 | Rotor structure of high-speed permanent magnet motor and motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222139554.2U CN218498899U (en) | 2022-08-15 | 2022-08-15 | Rotor structure of high-speed permanent magnet motor and motor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218498899U true CN218498899U (en) | 2023-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222139554.2U Active CN218498899U (en) | 2022-08-15 | 2022-08-15 | Rotor structure of high-speed permanent magnet motor and motor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218498899U (en) |
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2022
- 2022-08-15 CN CN202222139554.2U patent/CN218498899U/en active Active
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