CN112366858B

CN112366858B - Surface type permanent magnet motor rotor capable of being freely assembled

Info

Publication number: CN112366858B
Application number: CN202011293463.3A
Authority: CN
Inventors: 邹联石
Original assignee: Jiangxi Lima Electromechanical Technology Co ltd
Current assignee: Wuhan Ruigong Electromechanical Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-09-03
Anticipated expiration: 2040-11-18
Also published as: CN112366858A

Abstract

The invention relates to the field of rare earth permanent magnet motors, and provides a surface type permanent magnet motor rotor capable of being freely assembled. Including cylindrical ring shape rotary drum, the one end of rotary drum is equipped with the baffle, the other end of rotary drum is equipped with the external screw thread, the rotary drum has cup jointed the multiunit lasso, the outside of lasso is equipped with a pair of cuboid pillar relatively in the diameter direction, the top of pillar all is equipped with the screw rod, the lasso uses in pairs, the lasso sets up respectively in the both ends of rotary drum, the centre gripping has the arc permanent magnet between the pillar of adjacent lasso, the screw rod has cup jointed the backing plate, the screw rod has the nut at the upper end screwed connection of backing plate, be fixed in the permanent magnet between the pillar through nut and backing plate, rotary drum one end has lock nut through external screw thread screwed connection. The invention has the beneficial effects that: the number of the ferrules can be flexibly increased or decreased according to the number of the required permanent magnets, the rotary drum and the ferrules can be made into standard parts, and the fixing part for fixing the permanent magnets cannot be customized again due to the change of the shape and the size of the permanent magnets.

Description

Surface type permanent magnet motor rotor capable of being freely assembled

Technical Field

The invention relates to the field of rare earth permanent magnet motors, in particular to a freely-assembled surface type permanent magnet motor rotor.

Background

Because the rare earth permanent magnet material has excellent magnetic performance, the rare earth permanent magnet material can establish a strong permanent magnetic field without external energy after being magnetized, and the rare earth permanent magnet motor manufactured by replacing the electric excitation field of the traditional motor has high efficiency, simple structure, reliable operation, small volume and light weight. The motor not only can achieve the incomparable high performance of the traditional electric excitation motor, but also can be made into special motors which can meet the specific operation requirements, such as special motors for automobiles and the like.

The rare earth permanent magnet motor has a wide application range, and almost extends to various fields of aviation, aerospace, national defense, equipment manufacturing, industrial and agricultural production and daily life. The permanent magnet synchronous motor comprises a permanent magnet synchronous motor, a permanent magnet generator, a direct current motor, a brushless direct current motor, an alternating current permanent magnet servo motor, a permanent magnet linear motor, a special permanent magnet motor and a related control system, and almost covers the whole motor industry.

The rotor structure of the rare earth permanent magnet motor mainly comprises a surface type rotor structure and a built-in type rotor structure. The salient pole ratio rho of the surface type rotor structure is Lq/Ld is 1, the surface type rotor structure has the characteristics of no reluctance torque, large equivalent air gap, small armature reaction and good dynamic performance, and is commonly used in servo motors and traction motors. Surface type rotor permanent magnets are usually tile-shaped, are arranged on the surface of a rotor core, and generally need to be sleeved with a non-magnetic hoop barrel for protection or covered with a weftless glass ribbon as a protective layer. This structure has complicated permanent magnet shape, high machining cost, and results in increased rotor cost and increased surface loss. The built-in rotor embeds the permanent magnet into the rotor iron core, has simple processing technology and regular shape, has the salient pole rate not equal to 1, and is suitable for wide speed regulation occasions.

Disclosure of Invention

The invention aims to provide a freely assembled surface type permanent magnet motor rotor, which is mainly used for solving the problems of complex surface type rotor mounting structure, inconvenient mounting and more accessories and provides a modularized freely assembled surface type rotor structure.

The technical problem of the invention is mainly solved by the following technical scheme: including cylindrical ring shape rotary drum, the one end of rotary drum is equipped with the baffle, the other end of rotary drum is equipped with the external screw thread, the rotary drum has cup jointed the multiunit lasso, the outside of lasso is equipped with a pair of cuboid pillar in the diametric (al) is relative, the top of pillar all is equipped with the screw rod, the lasso uses in pairs, the lasso set up respectively in the both ends of rotary drum, adjacent the lasso the arc permanent magnet has been held to the centre of the pillar, the screw rod has cup jointed the backing plate, the screw rod is in the upper end screwed connection of backing plate has the nut, through the nut with the backing plate will the permanent magnet is fixed in between the pillar, rotary drum one end is passed through external screw thread screwed connection has lock nut.

Preferably, the screw rod is provided with a groove, the base plate is provided with a through hole, the through hole is provided with a limiting column matched with the groove, and the limiting column is embedded into the groove when the screw rod is inserted into the through hole. Through the constraint fit between the limiting column and the groove between the base plate and the screw rod, the base plate can not shift when the nut is screwed down.

The invention has the beneficial effects that: the number of the ferrules can be flexibly increased or decreased according to the number of the required permanent magnets, the rotary drum and the ferrules can be made into standard parts, and the fixing part for fixing the permanent magnets cannot be customized again due to the change of the shape and the size of the permanent magnets.

Drawings

FIG. 1 is a schematic diagram I of a structure according to the present invention;

FIG. 2 is a schematic diagram II of one embodiment of the present invention;

FIG. 3 is a schematic diagram III of one embodiment of the present invention;

FIG. 4 is a schematic view of the construction of a component ferrule of the present invention;

FIG. 5 is a schematic view of the construction of the component pallet of the present invention;

description of reference numerals: 1. the device comprises a rotary drum, 101, a baffle, 102, external threads, 2, a ferrule, 201, a support column, 3, a screw, 301, a groove, 4, a nut, 5, a backing plate, 501, a through hole, 502, a limiting column, 6, a permanent magnet and 7, a locking nut.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example 1

The surface permanent magnet motor rotor capable of being freely assembled comprises a cylindrical annular rotary drum 1, one end of the rotary drum 1 is provided with a baffle 101, the other end of the rotary drum 1 is provided with external threads 102, the rotary drum 1 is sleeved with a plurality of groups of ferrules 2, the outer sides of the ferrules 2 are oppositely provided with a pair of cuboid pillars 201 in the diameter direction, the tops of the pillars 201 are respectively provided with a screw rod 3, the ferrules 2 are used in pairs, the ferrules 2 are respectively arranged at two ends of the rotary drum 1, the embodiment is provided with two pairs of ferrules 2, arc-shaped permanent magnets 6 are clamped between the pillars 201 of the adjacent ferrules 2, 4 permanent magnets 6 are clamped through the pillars 201, the screw rod 3 is sleeved with a backing plate 5, the screw rod 3 is spirally connected with a nut 4 at the upper end of the backing plate 5, the permanent magnets 6 are fixed between the pillars 201 through the nut 4 and the backing plate 5, one end of the rotary drum 1 is spirally connected with a locking nut 7 through the external threads 102, the locking nut 7 can prevent the permanent magnets 6 from moving in the axial direction of the rotary drum 1, while the shim plate 5, constrained by the nut 4, prevents the permanent magnets 6 from moving in the radial direction of the drum 1.

Wherein, the screw rod 3 is equipped with recess 301, and backing plate 5 is equipped with through-hole 501, and through-hole 501 is equipped with the spacing post 502 with recess 301 looks adaptation, and when the screw rod 3 inserted through-hole 501, spacing post 502 embedding recess 301. The base plate 5 is matched with the screw rod 3 through the constraint between the limiting column 502 and the groove 301, so that the base plate 5 cannot shift when the nut 4 is screwed down.

During assembly, the sleeve 1 is fitted with the ferrules 2, and the two ferrules 2 are respectively arranged at the two ends of the sleeve 1. The permanent magnet 6 is then placed between the legs 201, one end of the permanent magnet 6 abuts against the baffle 101 when the permanent magnet 6 is placed, and then the lock nut 7 is tightened to fix the other end of the permanent magnet 6 by the lock nut 7. Then the backing plate 5 is sleeved into the screw 3 and the nut 4 is tightened.

While the foregoing embodiments are illustrative of the present invention, various modifications and changes may be readily made by those skilled in the art based upon the teachings and principles of this invention, which are intended to be limited not to the details of construction and methods herein shown, but rather to the preferred embodiments described, and therefore all equivalent modifications and changes in light of the above teachings are intended to be included within the scope of the present invention as defined in the appended claims.

Claims

1. The surface permanent magnet motor rotor capable of being freely assembled comprises a cylindrical annular rotary drum (1) and is characterized in that a baffle (101) is arranged at one end of the rotary drum (1), external threads (102) are arranged at the other end of the rotary drum (1), a plurality of groups of ferrules (2) are sleeved on the rotary drum (1), a pair of cuboid pillars (201) are oppositely arranged on the outer side of each ferrule (2) in the diameter direction, screw rods (3) are arranged at the tops of the pillars (201), the ferrules (2) are used in pairs, the ferrules (2) are respectively arranged at the two ends of the rotary drum (1), arc-shaped permanent magnets (6) are clamped between the pillars (201) of the adjacent ferrules (2), backing plates (5) are sleeved on the screw rods (3), nuts (4) are spirally connected to the upper ends of the backing plates (5), and the permanent magnets (6) are fixed on the pillars (201) through the nuts (4) and the backing plates (5) One end of the rotary drum (1) is spirally connected with a locking nut (7) through the external thread (102).

2. A freely assembled surface permanent magnet motor rotor according to claim 1, characterized in that the screw (3) is provided with a groove (301), the backing plate (5) is provided with a through hole (501), the through hole (501) is provided with a limit post (502) adapted to the groove (301), and the limit post (502) is embedded into the groove (301) when the screw (3) is inserted into the through hole (501).