CN211720352U

CN211720352U - High-speed permanent magnet synchronous motor rotor

Info

Publication number: CN211720352U
Application number: CN202020368723.8U
Authority: CN
Inventors: 张功旺; 陆屹; 杨雄
Original assignee: Fuzhou Xugu Technology Co ltd
Current assignee: Fujian Snowman Compressor Co.,Ltd.
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-10-20
Anticipated expiration: 2030-03-20

Abstract

The utility model relates to a high-speed PMSM rotor, it includes: the rotor comprises a rotor core formed by processing a blank casting by a precision machine tool, N, S-pole permanent magnets fixed on the surface of the rotor core in a staggered mode through structural adhesive, and a rotor protective sleeve for preventing the permanent magnets from falling off, wherein the rotor core is in transition fit with an output shaft, and the permanent magnets adopt a surface-mounted installation method; this electric motor rotor simple structure is practical, and the simplicity and convenience of installation and efficiency are higher, reduce rotor core material quantity, and air gap width between the stator and the rotor when the while easy control installation can satisfy the use of big torque, and then improves motor moving ride comfort and reliability.

Description

High-speed permanent magnet synchronous motor rotor

Technical Field

The utility model relates to a screw compressor machine technical field especially relates to a high-speed PMSM rotor.

Background

With the development of new energy automobiles, the vehicle-mounted performance requirements of the air compressor and the automobile industry standards become necessary factors for designing air compressor products; considering the limitation of vehicle-mounted space and the requirement of high displacement of the air compressor, the high-speed permanent magnet synchronous motor with stable performance becomes the primary choice of the vehicle-mounted air compressor.

The structural design of the motor rotor is an important link in the design of a high-speed rotating motor. The rotor is used as a main rotating and transmission part in the rotating equipment, and the reasonable structural design can reduce the cost and improve the efficiency; the rotor in the motor can rotate because three-phase alternating current is introduced into three phases of a stator winding to generate a rotating magnetic field; the rotor permanent magnet generates magnetic flux to cut the stator rotating magnetic field to generate electromotive force and current, and electromagnetic torque is formed to rotate the motor. Most current motor rotors are solid structures, and the certain diameter pivot is all reserved to the link, and most all use duplex bearing, have increased the material cost of rotor, and simultaneously, the solid structure of rotor has increased the inconvenience of installation, also brings the unnecessary consumption waste on the motor wholeness ability.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a high-speed permanent magnet synchronous motor rotor is provided.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the utility model provides a high-speed PMSM rotor, includes rotor core, permanent magnet and output shaft, rotor core has open-ended hollow circular cylinder structure for one end, the relative both sides of rotor core surface set up the recess respectively, the permanent magnet includes N utmost point permanent magnet and S utmost point permanent magnet, N utmost point permanent magnet and S utmost point permanent magnet are installed respectively in the recess of rotor core surface both sides, rotor core 'S open end with output shaft transition fit, rotor core' S the other end is provided with several internal thread hole.

Furthermore, structural adhesive is arranged in the groove and is positioned between the permanent magnet and the bottom of the groove.

Further, still include the rotor protective sheath, the rotor protective sheath sets up the outside of electric motor rotor, the length of rotor protective sheath covers the permanent magnet.

Further, the internal thread holes are uniformly arranged along the circumferential direction of the rotor core.

Furthermore, a threaded hole is formed in the output shaft, and the threaded hole is a circular threaded hole.

Further, the rotor core is fixed in the threaded hole through a fixing screw and the convex gasket.

The beneficial effects of the utility model reside in that: the utility model discloses a PMSM rotor simple structure, practicality, permanent magnet are installed at the iron core face of sinking, and rotor core has set for the internal thread hole and has been convenient for the direct mount in the equipment pivot, can save the bearing, and the iron core is inside to handle with hollow moreover, can make rotor simple structure compact, and the magnetic force consume is little, the consumption is few, present the PMSM rotor of high torque.

Drawings

Fig. 1 is a schematic structural diagram of a high-speed permanent magnet synchronous motor rotor according to an embodiment of the present invention;

description of reference numerals:

1. a rotor core; 2. a permanent magnet; 3. a rotor protection sleeve; 4. sinking the iron core to the surface; 5. an internally threaded bore; 6. fixing the bolt; 7. a convex gasket; 8. and an output shaft.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, the present invention provides a technical solution:

From the above description, the beneficial effects of the present invention are:

the utility model discloses a PMSM rotor simple structure, practicality, permanent magnet are installed at the iron core face of sinking, and rotor core has set for the internal thread hole and has been convenient for the direct mount in the equipment pivot, can save the bearing, and the iron core is inside to handle with hollow moreover, can make rotor simple structure compact, and the magnetic force consume is little, the consumption is few, present the PMSM rotor of high torque.

From the above description, the structural adhesive can bear large load, and is aging-resistant, fatigue-resistant, corrosion-resistant, and stable in performance in the expected life.

Further, still include the rotor protective sheath, the rotor protective sheath sets up the outside of electric motor rotor, rotor protective sheath length covers whole permanent magnet.

As can be seen from the above description, the rotor protective sleeve is used to protect the permanent magnets and prevent the permanent magnets from falling off due to centrifugal force generated by high-speed rotation.

As can be seen from the above description, the end of the rotor is provided with the internal thread hole, so that the bearing can be omitted, the bearing is regularly arranged, and the appearance is attractive.

As can be seen from the above description, the thread locking can be directly performed inside the rotor core, which greatly improves the installation convenience and the timeliness.

Referring to fig. 1, a first embodiment of the present invention is:

a high-speed permanent magnet synchronous motor rotor comprising: rotor core 1 that forms is processed through accurate lathe by the blank foundry goods, and rotor core is inside to be hollow structure, staggers to paste N, S utmost point permanent magnet 2 on rotor core surface with the structural adhesive to and be used for the rotor protective sheath 3 of fixed permanent magnet, rotor core 1 adopts threaded connection with output shaft 8, is locked fixedly by fixing bolt 6 and protruding type gasket 7, during the connection 1 hole of rotor core is sunk to protruding type gasket 7 convex surface, uses appointed moment of torsion to lock fixing bolt 6.

Preferably, in consideration of the manufacturing process, the N, S-pole permanent magnet 2 is installed in the rotor core sinking surface 4 in a surface-mounted mode, and the rotor protection sleeve 3 is gradually pressed in through the conical surface of the end surface of the rotor core until the permanent magnet is completely covered.

In this example, the internal thread hole 5 on the end face of the rotor core can assist the rotor to perform a dynamic balance correction process, and a weight removal or weight increase mode can be flexibly selected when the unbalance amount of the rotor is eliminated, so that the convenience of a dynamic balance process is improved.

Preferably, 6 internal thread holes 5 are preset at the tail end of the motor rotor.

To sum up, the utility model provides a pair of high-speed PMSM rotor, simple structure, it is convenient to assemble, through adopting a new structural design: the rotor core is provided with a sinking surface, the permanent magnet is installed in the sinking surface of the iron core by a surface-mounted method through structural adhesive, the rotor core can be directly installed on an equipment output shaft through bolts, a supporting bearing is omitted, and the rotor core is of a hollow structure, so that further optimized control can be carried out in the aspects of installation working hour and purchase cost; meanwhile, the rotor has the characteristics of simple and compact structure, small magnetic force loss, low power consumption and high efficiency, and can realize the permanent magnet synchronous motor with high torque and high rotating speed.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a high-speed PMSM rotor, its characterized in that, includes rotor core, permanent magnet and output shaft, rotor core has open-ended hollow circular cylinder structure for one end, the relative both sides of rotor core surface set up the recess respectively, the permanent magnet includes N utmost point permanent magnet and S utmost point permanent magnet, N utmost point permanent magnet and S utmost point permanent magnet are installed respectively in the recess of rotor core surface both sides, rotor core 'S open end with output shaft transition fit, rotor core' S the other end is provided with several internal thread hole.

2. The rotor of claim 1, wherein the groove is filled with structural adhesive, and the structural adhesive is located between the permanent magnet and the bottom of the groove.

3. The rotor of claim 1, further comprising a rotor protective sleeve disposed outside the motor rotor, wherein the rotor protective sleeve has a length that covers the permanent magnets.

4. The rotor of claim 1, wherein the internally threaded holes are uniformly arranged in the circumferential direction of the rotor core.

5. The rotor of claim 1, wherein the output shaft is provided with a threaded hole, and the threaded hole is a circular threaded hole.

6. The rotor of claim 5, wherein the rotor core is fixed in the threaded hole by a fixing screw and a convex gasket.