CN212412875U - High-speed-resistant structure of permanent magnet motor rotor - Google Patents
High-speed-resistant structure of permanent magnet motor rotor Download PDFInfo
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- CN212412875U CN212412875U CN202021686090.1U CN202021686090U CN212412875U CN 212412875 U CN212412875 U CN 212412875U CN 202021686090 U CN202021686090 U CN 202021686090U CN 212412875 U CN212412875 U CN 212412875U
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Abstract
The utility model provides a permanent magnet motor rotor high-speed resistant structure, which comprises magnetic steel and a magnetic yoke; the magnetic steel and the magnetic yoke are both strip-shaped, the section of the magnetic steel is rectangular, the section of the magnetic yoke is trapezoidal or triangular, and the magnetic steel and the magnetic yoke are distributed in a staggered and circumferential mode. The utility model can ensure the stable operation of the rotor at high speed without cracking and deformation; the magnetic steel and the magnetic yoke are alternately bonded on the shaft, the periphery of the magnetic steel and the outer circle of the magnetic yoke are bound and fixed by adopting a binding rope, and finally the magnetic steel and the magnetic yoke are protected by adopting a sheath; adopt ligature rope and sheath to carry out dual protection to magnet steel nuclear yoke, effectively prevent that magnet steel, yoke from receiving centrifugal force to fly out the axle under the high speed, the structural design of axle can make the motor built-in or coaxial installation simultaneously, reduces motor volume and weight.
Description
Technical Field
The utility model relates to a permanent-magnet machine rotor is high speed resistant structure.
Background
The aerospace craft has very high requirements on weight, volume, reliability and the like, the permanent magnet motor is more applied in the aerospace field due to higher power density, but the permanent magnet motor rotor has the risk of flying out of magnetic steel (a magnetic yoke and a partition plate) at high speed, the linear velocity of the surface of the rotor is often over 100m/s, the reliability is lower under high-speed operation, and the high-speed operation of the permanent magnet motor is limited.
The general surface-mounted permanent magnet rotor consists of a shaft, magnetic steel, a partition plate, baffle plates and a sheath, two axial baffle plates need to be assembled twice during assembly (firstly one baffle plate is assembled to limit the axial position of the magnetic steel, then the magnetic steel and the partition plate are assembled, and finally another baffle plate is assembled), the types of parts are few, but the assembly process is relatively complicated, the manufacturing cost is increased, and meanwhile, the failure risk of baffle plate falling off exists.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a permanent magnet motor rotor is high speed resistant structure, this permanent magnet motor rotor is high speed resistant structure can guarantee the stable operation of rotor under high speed, does not appear exploding and splits, warp.
The utility model discloses a following technical scheme can realize.
The utility model provides a high-speed resistant structure of a permanent magnet motor rotor, which comprises magnetic steel and a magnetic yoke; the magnetic steel and the magnetic yoke are both strip-shaped, the section of the magnetic steel is rectangular, the section of the magnetic yoke is trapezoidal or triangular, and the magnetic steel and the magnetic yoke are distributed in a staggered and circumferential mode.
The magnetic steel and the middle part of the outer surface of the magnetic yoke are provided with grooves along the tangential direction, and binding ropes are bound in the grooves.
The groove is step-shaped.
The magnetic steel and the magnetic yoke are fixed on the shaft, the shaft is of a spool structure, and the magnetic steel and the magnetic yoke are fixed between baffles at two ends of the spool.
The magnetic steel and the magnetic yoke are sleeved in the sheath.
The magnetic steel and the magnetic yoke are equal in length.
The binding rope is provided with an adhesive and is fixed on the magnetic steel and the magnetic yoke through the adhesive.
And the shaft, the magnetic steel and the magnetic yoke are bonded and fixed by adhesive.
The depth of the groove is 1 mm.
The beneficial effects of the utility model reside in that: the stable operation of the rotor at high speed can be ensured, and the cracking and the deformation are avoided; the magnetic steel and the magnetic yoke are alternately bonded on the shaft, the periphery of the magnetic steel and the outer circle of the magnetic yoke are bound and fixed by adopting a binding rope, and finally the magnetic steel and the magnetic yoke are protected by adopting a sheath; adopt ligature rope and sheath to carry out dual protection to magnet steel nuclear yoke, effectively prevent that magnet steel, yoke from receiving centrifugal force to fly out the axle under the high speed, the structural design of axle can make the motor built-in or coaxial installation simultaneously, reduces motor volume and weight.
Drawings
Fig. 1 is a schematic diagram of the explosion structure of the present invention;
FIG. 2 is a schematic view of the assembled half-section of FIG. 1;
fig. 3 is a front view of fig. 2.
In the figure: 1-shaft, 2-magnetic steel, 3-magnetic yoke, 4-binding rope, 5-sheath, 6-adhesive.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1 to 3, the permanent magnet motor rotor high speed resistant structure includes a magnetic steel 2 and a magnetic yoke 3; the magnetic steel 2 and the magnetic yoke 3 are both strip-shaped, the section of the magnetic steel 2 is rectangular, the section of the magnetic yoke 3 is trapezoidal or triangular, and the magnetic steel 2 and the magnetic yoke 3 are distributed in a staggered and circumferential mode.
The middle parts of the outer surfaces of the magnetic steel 2 and the magnetic yoke 3 are provided with grooves along the tangential direction, and binding ropes 4 are bound in the grooves.
The groove is step-shaped.
The magnetic steel 2 and the magnetic yoke 3 are fixed on the shaft 1, the shaft 1 is of a spool structure, and the magnetic steel 2 and the magnetic yoke 3 are fixed between baffles at two ends of the spool.
The magnetic steel 2 and the magnetic yoke 3 are sleeved in the sheath 5.
The magnetic steel 2 and the magnetic yoke 3 are equal in length.
The binding rope 4 is provided with an adhesive 6 and is fixed on the magnetic steel 2 and the magnetic yoke 3 through the adhesive 6.
The shaft 1, the magnetic steel 2 and the magnetic yoke 3 are fixedly bonded by an adhesive 6.
The depth of the groove is 1 mm.
Example 1
From the above, the shaft 1 of the permanent magnet motor rotor high-speed resistant structure is a hollow structure, the front and rear sheet structures are integrated with the shaft, the whole body is concave, and the concave surface is subjected to sand blasting treatment, so that the bonding strength is convenient to improve; the magnetic steel 2 is of a cuboid structure, and a groove with the depth of 1mm is designed in the middle of the magnetic steel; the magnet yoke 3 is of a trapezoidal structure, a groove with the design depth of 1mm is formed in the middle of the magnet yoke, and the magnet yoke is made of a material with good magnetic conductivity;
further, 12 magnetic steels 2 and 12 magnetic yokes 3 are spliced in the grooves of the shaft 1, the magnetic steels 2 and the magnetic yokes 3 are alternately distributed, and the contact surfaces of the three parts, namely the magnetic steels 2, the magnetic steels 3 and the shaft 1, are coated with adhesives 6;
furthermore, the binding rope 4 is coated with the adhesive 6 and then bound in a groove formed by the magnetic steel 2 and the magnetic yoke 3, the binding rope 6 is under tension during binding, the conditions of loose and untight binding are avoided after binding, and the adhesive 6 is coated on the binding rope 4 after binding;
preferably, after the adhesive 6 is cured, the dimensions formed by the shaft 1, the magnetic steel 2, the magnetic yoke 3 and the adhesive 6 are processed by taking an inner hole of the shaft 1 as a reference;
specifically, the sheath is heated, the sheath 5 is sleeved on a rotor assembly formed by the shaft 1, the magnetic steel 2, the magnetic yoke 3 and the adhesive 6, the contact edges formed by the shaft 1 and the sheath 5 are subjected to laser welding, and the shaft 1 and the sheath 5 are mechanically fixed together;
specifically, the inner hole is used as a reference, the rotor is removed in weight after penetrating through the dynamic balance core shaft, and the weight can be removed at two ends of the groove on the shaft 1.
Therefore, the rotating shaft is of a hollow structure, two inner holes are arranged at the front end and the rear end, a spline is arranged in the rotating shaft, the coaxiality of the rotating shaft and the rotating shaft after assembly is increased by positioning the front inner hole and the rear inner hole, the spline transmission is adopted to ensure the transmission stability,
preferably, the outer circle of the rotating shaft is concave and is used for embedding the magnetic steel and the magnetic yoke, and the joint surface of the magnetic steel and the magnetic yoke is subjected to sand blasting treatment to improve the roughness of the contact surface;
preferably, the magnetic steel structure is a cuboid, a groove with a certain depth is formed in the middle of the magnetic steel structure, and the magnetic steel is magnetized in a tangential direction;
preferably, the magnetic yoke structure is a trapezoid body, and a groove with a certain depth is formed in the middle of the magnetic yoke structure;
furthermore, the bonding surfaces of the magnetic steel and the magnetic yoke are alternately distributed and placed in a groove of the shaft, the magnetic steel and the magnetic yoke are the same in quantity, the bottom of the magnetic steel and the magnetic yoke are in contact with the groove of the shaft, the contact surfaces of the magnetic steel, the magnetic yoke and the shaft are coated with a bonding agent, and N, S radial magnetic fields alternately distributed are formed in the circumferential radial direction through the magnetic yoke after the magnetic steel and the magnetic yoke are spliced;
preferably, the edges of the grooves formed in the middle of the magnetic steel and the magnetic yoke are convex edges, so that tension control after binding of the binding rope is facilitated;
specifically, binding is carried out in a groove formed by the magnetic steel and the magnetic yoke by adopting a nonmetal binding rope, such as a carbon fiber wire and a nylon band, the binding rope is soaked in an adhesive and then bound, the binding rope is bound under certain tension during binding, the tension can be controlled to be 10-30% of the breaking force of the binding rope, the size formed by the bound rope is smaller than the size of an inner hole of the sleeve, and the size of the adhesive is larger than the size of the inner hole of the sleeve;
preferably, after the adhesive is fixed, the size of an inner hole of the shaft is used as a processing reference, and the size of the outer circle of the rotor assembly is processed;
preferably, the sheath is heated, the sheath is sleeved on the rotor assembly, and the formed contact edge is subjected to laser welding; and then, the size of the outer circle of the rotor is processed by taking the size of the shaft as an inner hole as a processing reference, and the weight is removed on the shaft according to the requirement of the residual unbalance of the rotor after processing.
Claims (9)
1. The utility model provides a permanent-magnet machine rotor is high speed resistant structure, includes magnet steel (2), yoke (3), its characterized in that: the magnetic steel (2) and the magnetic yoke (3) are both strip-shaped, the section of the magnetic steel (2) is rectangular, the section of the magnetic yoke (3) is trapezoidal or triangular, and the magnetic steel (2) and the magnetic yoke (3) are distributed in a staggered and circumferential mode.
2. The permanent magnet motor rotor high speed structure of claim 1, wherein: the middle parts of the outer surfaces of the magnetic steel (2) and the magnetic yoke (3) are provided with grooves along the tangential direction, and binding ropes (4) are bound in the grooves.
3. The permanent magnet motor rotor high speed structure of claim 2, wherein: the groove is step-shaped.
4. The permanent magnet motor rotor high speed structure of claim 1, wherein: the magnetic steel (2) and the magnetic yoke (3) are fixed on the shaft (1), the shaft (1) is of a spool structure, and the magnetic steel (2) and the magnetic yoke (3) are fixed between baffles at two ends of the spool.
5. The permanent magnet motor rotor high speed structure of claim 1, wherein: the magnetic steel (2) and the magnetic yoke (3) are sleeved in the sheath (5).
6. The permanent magnet motor rotor high speed structure of claim 1, wherein: the magnetic steel (2) and the magnetic yoke (3) are equal in length.
7. The permanent magnet motor rotor high speed structure of claim 2, wherein: the binding rope (4) is provided with an adhesive (6) and is fixed on the magnetic steel (2) and the magnet yoke (3) through the adhesive (6).
8. The rotor high speed structure of permanent magnet motor according to claim 4, wherein: the shaft (1), the magnetic steel (2) and the magnet yoke (3) are fixedly bonded by an adhesive (6).
9. The permanent magnet motor rotor high speed structure of claim 2, wherein: the depth of the groove is 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021686090.1U CN212412875U (en) | 2020-08-13 | 2020-08-13 | High-speed-resistant structure of permanent magnet motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021686090.1U CN212412875U (en) | 2020-08-13 | 2020-08-13 | High-speed-resistant structure of permanent magnet motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212412875U true CN212412875U (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021686090.1U Active CN212412875U (en) | 2020-08-13 | 2020-08-13 | High-speed-resistant structure of permanent magnet motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212412875U (en) |
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2020
- 2020-08-13 CN CN202021686090.1U patent/CN212412875U/en active Active
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