CN218124418U - High-speed rotating rotor punching sheet - Google Patents
High-speed rotating rotor punching sheet Download PDFInfo
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- CN218124418U CN218124418U CN202222090605.7U CN202222090605U CN218124418U CN 218124418 U CN218124418 U CN 218124418U CN 202222090605 U CN202222090605 U CN 202222090605U CN 218124418 U CN218124418 U CN 218124418U
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- magnetic steel
- steel groove
- rotor punching
- punching sheet
- rotor
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Abstract
The utility model discloses a high-speed rotatory rotor punching, including the rotor punching body, the rotor punching body's center is equipped with the shaft hole, the rotor punching body evenly is equipped with a plurality of magnet steel slot groups along the circumferencial direction, and every magnet steel slot group comprises the first magnet steel slot that is located the centre and the second magnet steel slot that is located both sides, first magnet steel slot is waist-shaped groove, the second magnet steel slot is kept away from first magnet steel slot one side is equipped with the air groove, the air groove with it separates the magnetic bridge to form between the outer peripheral edge of rotor punching body. The utility model provides a rotor punching sheet, simple structure, it is convenient to make, and is efficient when guaranteeing intensity.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to high-speed rotatory rotor punching.
Background
The motor rotor comprises a rotor core, magnetic steel and a rotating shaft, the rotor punching sheets are laminated to form the rotor core, and magnetic steel grooves matched with the magnetic steel are formed in the rotor punching sheets. When the magnetic steel and the rotor iron core are assembled, the magnetic steel is firstly inserted into the magnetic steel groove, and then the gap between the magnetic steel and the rotor iron core is filled with the adhesive. The groove size of the rotor, the structural form of the permanent magnet placement and the like all have important influences on the performance of the motor. Fig. 1 shows a rotor sheet of a conventional permanent magnet motor, which is designed by simply considering a magnetic circuit from a magnetic steel arrangement mode, and is prone to waste of magnetic steel and local stress concentration of the rotor sheet.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a high-speed rotatory rotor punching is provided, simple structure, it is convenient to make, and is efficient when guaranteeing intensity.
In order to solve the technical problem, the utility model provides a high-speed rotatory rotor punching, including the rotor punching body, the center of rotor punching body is equipped with the shaft hole, the rotor punching body evenly is equipped with a plurality of magnet steel groove groups along the circumferencial direction, and every magnet steel groove group comprises the first magnet steel groove that is located the centre and the second magnet steel groove that is located both sides, first magnet steel groove is waist type groove, the second magnet steel groove is kept away from first magnet steel groove one side is equipped with the air duct, the air duct with it separates the magnetic bridge to form between the outer peripheral edges of rotor punching body.
In an improvement of the above, the air groove is formed by projecting the inner side wall of the second magnetic steel groove in the direction of the outer side wall.
As an improvement of the above scheme, the number of the magnetic steel slot groups is n, the center of the first magnetic steel slot is arranged on an axis of the rotor punching body, the n is equally divided, the first magnetic steel slot is perpendicular to the axis, a certain deflection angle is formed between the second magnetic steel slot and the first magnetic steel slot in the length direction, and the preset deflection angle is 140-160 °.
As an improvement of the scheme, the diameter of the shaft hole
The diameter of the rotor punching sheet body
The relation with the length H of the first magnetic steel groove satisfies
As an improvement of the scheme, the relation between the distance T between the inner side wall of the first magnetic steel groove and the outer wall of the shaft hole, the distance G between the outer side wall of the first magnetic steel groove and the periphery of the rotor sheet body and the length H of the first magnetic steel groove meets the condition that (T + G)/H is more than or equal to 1.1 and less than or equal to 1.2.
As an improvement of the scheme, the relation between the length H of the first magnetic steel groove and the width L of the first magnetic steel groove satisfies that H/L is more than or equal to 6 and less than or equal to 7.
As an improvement of the scheme, the number of the magnetic steel slot groups is the same as the number of the rotor poles.
As an improvement of the scheme, the rotor punching sheet body is further uniformly provided with a plurality of process holes along the circumferential direction, the number of the process holes is the same as the number of the rotor poles, and the process holes are formed between every two adjacent magnetic steel groove groups.
Implement the utility model discloses, following beneficial effect has: through the structure and the size of optimizing the magnetic steel groove, improve overall efficiency under the circumstances of guaranteeing rotor strength, structural feature is simple, and it is convenient to make towards the piece, possesses qualified structural strength.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration;
fig. 2 is a schematic structural diagram of a rotor sheet provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. Only this statement, the utility model discloses the upper and lower, left and right, preceding, back, inside and outside etc. position words that appear or will appear in the text only use the utility model discloses an attached drawing is the benchmark, and it is not right the utility model discloses a concrete restriction.
As shown in fig. 2, the embodiment of the utility model provides a high-speed rotatory rotor punching, including rotor punching body 1, rotor punching body 1's center is equipped with shaft hole 2, rotor punching body 1 evenly is equipped with a plurality of magnet steel slot groups 3 along the circumferencial direction, every magnet steel slot group 3 comprises first magnet steel slot 4 that is located the centre and second magnet steel slot 5 that is located both sides, first magnet steel slot 4 is waist type groove, second magnet steel slot 5 is kept away from first magnet steel slot 4 one side and is equipped with air duct 6, forms between air duct 6 and the rotor punching body 1's the outer peripheral edge and separates magnetic bridge 7.
The air groove 6 is formed by projecting the inner wall 51 of the second magnetic steel groove 5 in the direction of the outer wall 52. The number of the magnetic steel groove groups 3 is n, the center of the first magnetic steel groove 4 is arranged on an axis of the rotor punching sheet body 1, the n is equally divided, the first magnetic steel groove 4 is vertical to the axis, an off-angle of 140-160 degrees is formed between the second magnetic steel groove 5 and the length direction of the first magnetic steel groove 4 so as to adapt to the outline of the rotor punching sheet body 1, and a proper permanent magnet magnetic circuit structure is selected on the premise of ensuring the permanent magnet placing space through the arrangement of the magnetic steel groove groups 3.
Through the multiple groups of magnetic steel grooves 3 which are radially arranged, the efficiency can be improved while the structural stability of the rotor punching sheet body 1 is ensured. The radial rotor magnetic circuit structure has the advantages that the magnetic leakage coefficient is small, the rotating shaft does not need to adopt a magnetic isolation measure, the pole arc coefficient is easy to control, the mechanical strength of the rotor punching sheet is high, the rotor is not easy to deform after the magnetic steel is installed, and the like. In this embodiment, each group of magnetic steel slots 3 includes 1 first magnetic steel slot 4 and 2 second magnetic steel slots 5, and the left side of the second magnetic steel slot 5 on the left and the right side of the second magnetic steel slot 5 on the right are all equipped with air slot 6, and air slot 6 is as separating magnetic hole, forms between the outer peripheral edges of air slot 6 and rotor punching body 1 and separates the magnetic bridge. The magnetic flux reaches saturation through the magnetic isolation bridge, so that the effect of limiting magnetic flux leakage is achieved, the structure is simple, the operation is reliable, and the mechanical strength of the rotor is high.
Preferably, the diameter of the shaft hole 2
Diameter of rotor punching sheet body 1
The relation with the length H of the first magnetic steel groove 4 satisfies
If it is
The length of the first magnetic steel groove 4 is too long, so that the arrangement of the magnetic steel groove group 3 cannot be ensured, the processing is difficult, and the service life of the punching die is shortened; if it is
It causes a serious magnetic flux leakage, wastes permanent magnets, increases costs, and also reduces the starting capability of the motor, so that the calculation of the mechanical strength and the electromagnetic field is combined in the design to determine the width of the first magnetic steel slot 4.
Preferably, the relation between the distance T between the inner side wall of the first magnetic steel groove 4 and the outer wall of the shaft hole 2, the distance G between the outer side wall of the first magnetic steel groove 4 and the periphery of the rotor punching sheet body 1 and the length H of the first magnetic steel groove 4 meets the requirement that (T + G)/H is less than or equal to 1.2 and is more than or equal to 1.1, and on the premise of ensuring punching sheet strength and processing technology, the magnetic leakage is reduced as much as possible, and the magnetic leakage coefficient is reduced.
Preferably, the relationship between the length H of the first magnetic steel slot 4 and the width L of the first magnetic steel slot 4 satisfies that H/L is more than or equal to 6 and less than or equal to 7, the length H is related to the air gap flux in the rated working state, and the width L is related to the magnetic potential of the motor magnetic circuit in the rated working state of the motor, so that the ratio of the width to the height of the first magnetic steel slot is reasonably controlled, the air gap flux of the rotor sheet is reduced, and the overall efficiency is improved.
As the utility model discloses more excellent embodiment, the number of magnet steel groove group 3 is the same with the rotor number of poles, and the rotor number of poles can be 2,4,6,8 etc. and the number of the magnet steel groove group 3 that corresponds is 2 groups, 4 groups, 6 groups or 8 groups etc.. In this embodiment, the number of rotor poles is 4, and 4 magnetic steel slot groups 3 are correspondingly arranged.
As the utility model discloses more excellent embodiment, rotor punching body 1 still evenly is equipped with a plurality of fabrication holes 8 along the circumferencial direction, and 8 quantity of fabrication holes are the same with the rotor number of poles, and fabrication hole 8 sets up between two adjacent magnet steel bank of cells 3. The fabrication holes 8 are used for positioning and simultaneously can reduce the total mass of the rotor, and the fabrication holes 8 are arranged between the two adjacent groups of magnetic steel grooves 3, so that the overall strength of the rotor punching sheet body 1 cannot be reduced. In this embodiment, the number of rotor poles is 4, and the number of the process holes 8 is 4.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (8)
1. A high-speed rotation rotor punching sheet is characterized in that: the rotor punching sheet comprises a rotor punching sheet body, wherein a shaft hole is formed in the center of the rotor punching sheet body, a plurality of magnetic steel groove groups are uniformly arranged on the rotor punching sheet body along the circumferential direction, each magnetic steel groove group is composed of a first magnetic steel groove located in the middle and second magnetic steel grooves located on two sides, the first magnetic steel groove is a waist-shaped groove, the second magnetic steel groove is far away from one side of the first magnetic steel groove, and a magnetic separation bridge is formed between the air grooves and the outer peripheral edge of the rotor punching sheet body.
2. The high-speed rotating rotor sheet as recited in claim 1, wherein: the air groove is formed by the protrusion of the inner side wall of the second magnetic steel groove towards the direction of the outer side wall.
3. The high-speed rotating rotor sheet as recited in claim 1, wherein: the number of the magnetic steel groove groups is n, the center of the first magnetic steel groove is arranged on an axis of the rotor punching sheet body n which is divided equally, the first magnetic steel groove is perpendicular to the axis, a preset deflection angle is formed between the second magnetic steel groove and the first magnetic steel groove in the length direction, and the preset deflection angle is 140-160 degrees.
4. The high-speed rotating rotor punching sheet according to claim 1, characterized in that: diameter of the shaft hole
The diameter of the rotor punching sheet body
The relation with the length H of the first magnetic steel groove satisfies
5. The high-speed rotating rotor sheet as recited in claim 1, wherein: the inside wall in first magnet steel groove with the distance T of the outer wall in shaft hole, the lateral wall in first magnet steel groove with the distance G of the periphery of rotor punching piece body with the relation of the length H in first magnet steel groove satisfies that (T + G)/H is less than or equal to 1.1 and less than or equal to 1.2.
6. The high-speed rotating rotor sheet as recited in claim 1, wherein: the relation between the length H of the first magnetic steel groove and the width L of the first magnetic steel groove meets the condition that H/L is more than or equal to 6 and less than or equal to 7.
7. The high-speed rotating rotor punching sheet according to claim 1, characterized in that: the number n of the magnetic steel slot groups is the same as the number p of the rotor poles.
8. The high-speed rotating rotor punching sheet according to claim 1, characterized in that: the rotor punching sheet body is further evenly provided with a plurality of process holes in the circumferential direction, the number of the process holes is the same as the number p of the rotor poles, and the process holes are formed between every two adjacent magnetic steel groove groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222090605.7U CN218124418U (en) | 2022-08-08 | 2022-08-08 | High-speed rotating rotor punching sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222090605.7U CN218124418U (en) | 2022-08-08 | 2022-08-08 | High-speed rotating rotor punching sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218124418U true CN218124418U (en) | 2022-12-23 |
Family
ID=84523027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222090605.7U Active CN218124418U (en) | 2022-08-08 | 2022-08-08 | High-speed rotating rotor punching sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218124418U (en) |
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2022
- 2022-08-08 CN CN202222090605.7U patent/CN218124418U/en active Active
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