CN214959219U

CN214959219U - Mining explosion-proof permanent magnet synchronous variable frequency motor

Info

Publication number: CN214959219U
Application number: CN202121512485.4U
Authority: CN
Inventors: 加晓磊
Original assignee: Taiyuan Luhai Automation Technology Co ltd
Current assignee: Taiyuan Luhai Automation Technology Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-11-30
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a mining flame-proof type permanent magnet synchronous variable frequency motor, which comprises an explosion-proof frame, a stator core and a rotor core, wherein the inner side wall of the explosion-proof frame is fixedly connected with the stator core, the inner side of the stator core is provided with a plurality of winding grooves, stator windings are wound between the winding grooves, the central axis of the explosion-proof frame is rotatably connected with the rotor core, the central axis of the rotor core is provided with a magnetic isolation shaft tube in a penetrating way, a rotating shaft is arranged in the magnetic isolation shaft tube in a penetrating way, the section of the rotor core is provided with a plurality of through holes, the through holes are uniformly distributed in an annular array, and mounting grooves are respectively arranged between the adjacent through holes, and permanent magnets are nested in the mounting grooves, a plurality of connecting grooves are arranged on the peripheral side wall of the rotor core, the connecting grooves are respectively arranged opposite to the through holes, and permanent magnets are fixedly embedded in the connecting grooves, and end rings are fixedly mounted at two ends of the rotor core respectively. The utility model aims at providing a permanent magnetism synchronous variable frequency motor that simple structure, dependable performance, price/performance ratio are high.

Description

Mining explosion-proof permanent magnet synchronous variable frequency motor

Technical Field

The utility model relates to a PMSM technical field, specific mining flame-proof type PMSM that says so.

Background

A permanent magnet synchronous motor (PMSM for short) is mainly composed of a rotor, an end cover, a stator and other parts. The stator structure of a permanent magnet synchronous motor is very similar to that of a common induction motor, the rotor structure is different from an asynchronous motor in that a high-quality permanent magnet magnetic pole is arranged on a rotor, the permanent magnet synchronous motor is generally divided into a surface type rotor structure and a built-in type rotor structure according to the position of the permanent magnet arranged on the rotor, the arrangement mode of the permanent magnet greatly affects the performance of the motor, and in the prior art, the permanent magnet is generally embedded in the surface or the interior, and the performance is lower.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned weak point that exists among the prior art, the utility model aims at providing a permanent magnetism synchronous variable frequency motor that simple structure, dependable performance, price/performance ratio are high.

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a mining explosion-proof permanent magnet synchronous variable frequency motor comprises an explosion-proof machine base, a stator core and a rotor core, wherein the inner side wall of the explosion-proof machine base is fixedly connected with the stator core, the inner side of the stator core is provided with a plurality of winding grooves, stator windings are wound among the winding grooves, the central axis of the explosion-proof machine base is rotatably connected with the rotor core, a magnetic isolation shaft tube is arranged on the central axis of the rotor core in a penetrating manner, a rotating shaft is arranged in the magnetic isolation shaft tube in a penetrating manner, the section of the rotor core is provided with a plurality of through holes, the through holes are uniformly distributed in an annular array, mounting grooves are respectively arranged between the adjacent through holes, the mounting grooves are distributed in an outer splayed manner, permanent magnets are embedded in the mounting grooves, the peripheral side wall of the rotor core is provided with a plurality of connecting grooves, the connecting grooves are respectively arranged opposite to the positions of the through holes, and the permanent magnets are fixedly embedded in the connecting grooves, and end rings are fixedly arranged at two ends of the rotor core respectively.

And the explosion-proof machine base outer shell is fixedly connected with a junction box, and the junction box is connected with the stator winding.

A front end cover and a rear end cover are fixedly connected to two ends of the explosion-proof machine base respectively, one end of the rotating shaft penetrates through the magnetism isolating shaft tube and then is rotatably connected into the rear end cover, and a heat dissipation fan is rotatably connected into the rear end cover and is fixedly connected onto the rotating shaft;

the other end of the rotating shaft penetrates out of the magnetism isolating shaft tube and then is fixedly connected with a connecting bearing, and the connecting bearing is embedded and installed at the central end face of the front end cover.

The end ring is provided with a plurality of ventilation holes which are respectively arranged opposite to the through holes, and the outer end face of the end ring is fixedly connected with a plurality of rotor fans.

The utility model has the advantages that: the utility model discloses in the rotor iron core through the magnetic pole interact between permanent magnet and the permanent magnet, improved rotor iron core's magnetic induction line to improve the motor performance, compared with prior art have simple structure, dependable performance, the characteristics of price/performance ratio height.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of the motor of the present invention;

FIG. 2 is a schematic view of the structure of the rotor core of the present invention;

FIG. 3 is a schematic view of the rotor core splitting structure of the present invention;

fig. 4 is a schematic view of the magnetic pole direction and magnetic induction line of the rotor core of the present invention.

In the figure: 1 explosion-proof frame, 2 stator cores, 3 rotor cores, 4 stator windings, 5 magnetic isolation shaft tubes, 6 rotating shafts, 7 through holes, 8 mounting grooves, 9 permanent magnets, 10 connecting grooves, 11 permanent magnets, 12 end rings, 13 junction boxes, 14 front end covers, 15 rear end covers, 16 heat dissipation fans, 17 connecting bearings, 18 ventilation holes and 19 rotor fans.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, a mining flameproof permanent magnet synchronous variable frequency motor comprises an explosion-proof base 1, a stator core 2 and a rotor core 3, wherein the inner side wall of the explosion-proof base 1 is fixedly connected with the stator core 2, a plurality of winding slots are formed in the inner side of the stator core 2, a stator winding 4 is wound between the winding slots, the rotor core 3 is rotatably connected with the central axis of the explosion-proof base 1, a magnetic isolation shaft tube 5 is arranged on the central axis of the rotor core 3 in a penetrating manner, a rotating shaft 6 is arranged in the magnetic isolation shaft tube 5 in a penetrating manner, a plurality of through holes 7 are formed in the section of the rotor core 3, the through holes 7 are uniformly distributed in an annular array, mounting grooves 8 are respectively formed between adjacent through holes 7, the mounting grooves 8 are distributed in a shape like a Chinese character 'ba', permanent magnets 9 are nested in the mounting grooves 8, a plurality of connecting grooves 10 are formed in the peripheral side wall of the rotor core 3, and the connecting grooves 10 are respectively arranged opposite to the through holes 7, permanent magnets 11 are fixedly embedded in the connecting grooves 10, and end rings 12 are fixedly mounted at two ends of the rotor core 3 respectively.

The utility model discloses in, fixedly connected with terminal box 13 on the 1 shell body of explosion-proof frame, terminal box 13 is connected with stator winding 4, permanent magnet synchronous motor's power adopts the variable frequency speed regulator to provide, converter output frequency rises to operating frequency from 0 beginning in succession during the start-up, motor speed then follows converter output frequency and rises in step, it can change motor speed to change converter output frequency, the converter electric current inserts stator winding 4 through terminal box 13 to produce the magnetic field and drive rotor core 3 and rotate.

The two ends of the explosion-proof machine base 1 are respectively and fixedly connected with a front end cover 14 and a rear end cover 15, one end of a rotating shaft 6 penetrates through the magnetic isolation shaft tube 5 and then is rotatably connected into the rear end cover 15, a heat radiation fan 16 is rotatably connected into the rear end cover 15, and the heat radiation fan 16 is fixedly connected onto the rotating shaft 6 and used for heat radiation inside the motor;

the other end of the rotating shaft 6 penetrates through the magnetic isolation shaft tube 5 and then is fixedly connected with a connecting bearing 17, and the connecting bearing 17 is embedded and installed at the central end face of the front end cover 14 and used for rotating the rotating shaft 6.

The end ring 12 is provided with a plurality of ventilation holes 18, the ventilation holes 18 are respectively arranged opposite to the through holes 7, and the outer end face of the end ring 12 is also fixedly connected with a plurality of rotor fans 19 for improving the heat dissipation efficiency inside the motor.

The utility model discloses in, the magnetic pole magnetism of the 9 opposite faces of two sets of permanent magnets between the adjacent through-hole 7 is opposite, and the 9 magnetic pole magnetism of permanent magnet of through-hole 7 both sides is the same with the inboard magnetic pole magnetism of permanent magnet 11, specifically as shown in FIG. 4.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a mining flame-proof type permanent magnetism synchronous variable frequency motor, includes explosion-proof frame (1), stator core (2), rotor core (3), its characterized in that: the explosion-proof machine base (1) is characterized in that a stator core (2) is fixedly connected to the inner side wall of the explosion-proof machine base (1), a plurality of winding grooves are formed in the inner side of the stator core (2), stator windings (4) are wound among the winding grooves, a rotor core (3) is rotatably connected to the central axis of the explosion-proof machine base (1), a magnetic isolation shaft tube (5) penetrates through the central axis of the rotor core (3), a rotating shaft (6) penetrates through the magnetic isolation shaft tube (5), a plurality of through holes (7) are formed in the section of the rotor core (3), the through holes (7) are uniformly distributed in an annular array, mounting grooves (8) are formed between the adjacent through holes (7) respectively, the mounting grooves (8) are distributed in a shape of a Chinese character 'ba', permanent magnets (9) are embedded in the mounting grooves (8), and a plurality of connecting grooves (10) are formed in the peripheral side wall of the rotor core (3), the connecting grooves (10) are arranged opposite to the through holes (7) respectively, permanent magnets (11) are fixedly embedded in the connecting grooves (10), and end rings (12) are fixedly mounted at two ends of the rotor core (3) respectively.

2. The mining flameproof permanent magnet synchronous variable frequency motor according to claim 1, characterized in that: and the explosion-proof machine base (1) is characterized in that a junction box (13) is fixedly connected to the outer shell of the explosion-proof machine base, and the junction box (13) is connected with the stator winding (4).

3. The mining flameproof permanent magnet synchronous variable frequency motor according to claim 1, characterized in that: the explosion-proof machine base (1) is characterized in that a front end cover (14) and a rear end cover (15) are fixedly connected to two ends of the explosion-proof machine base respectively, one end of the rotating shaft (6) penetrates through the magnetism isolating shaft tube (5) and then is rotatably connected into the rear end cover (15), a heat dissipation fan (16) is rotatably connected into the rear end cover (15), and the heat dissipation fan (16) is fixedly connected onto the rotating shaft (6);

the other end of the rotating shaft (6) penetrates out of the rear fixed connection of the magnetism isolating shaft tube (5) to be connected with a connecting bearing (17), and the connecting bearing (17) is installed at the central end face of the front end cover (14) in a nested mode.

4. The mining flameproof permanent magnet synchronous variable frequency motor according to claim 1, characterized in that: the end ring (12) is provided with a plurality of ventilation holes (18), the ventilation holes (18) are respectively arranged opposite to the through holes (7), and the outer end face of the end ring (12) is also fixedly connected with a plurality of rotor fans (19).