CN219554689U

CN219554689U - Vertical direct-drive permanent magnet synchronous motor for new energy reaction kettle

Info

Publication number: CN219554689U
Application number: CN202320167654.8U
Authority: CN
Inventors: 刘康哲; 郭福春; 林祺; 黄智鑫
Original assignee: Xiamen Situo Servo Technology Co ltd
Current assignee: Xiamen Situo Servo Technology Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-08-18
Anticipated expiration: 2033-02-08

Abstract

The utility model relates to a vertical direct-drive permanent magnet synchronous motor for a new energy reaction kettle, which comprises a stator and a rotor, wherein the stator consists of a stator core and a shell, and the rotor consists of a rotor core, a front end cover and a rear end cover; the stator core is arranged in such a way that the fractional slot windings are embedded on stator punching sheets, and the stator punching sheets have a flat bottom slot structure; the number of slots per phase of each pole of the fractional-slot winding is less than 1; the rotor core is provided with the front bearing with the front end housing cooperation, and it comprises a pair of face-to-face angular contact ball bearing, rotor core is provided with the rear bearing with the rear end housing cooperation, and it comprises deep groove ball bearing, adaptable new forms of energy reation kettle mixer's complex operating mode, and realizes energy-conserving high efficiency, and vibration noise is little.

Description

Vertical direct-drive permanent magnet synchronous motor for new energy reaction kettle

Technical Field

The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a vertical direct-drive permanent magnet synchronous motor for a new energy reaction kettle.

Background

The transmission system of the stirring motor of the large-scale reaction kettle at the present stage mostly adopts a mechanical speed change method of an induction motor to realize low-speed operation, and has the advantages of more transmission links, long transmission chain and low transmission efficiency; the power electronics technology can realize speed change, but can not solve the problem of low transmission efficiency of the system; the coupler, the speed reducer, the coupler and the like are designed and manufactured in a scattered manner, the production period is long, and the cost of processing equipment is high.

The design of the permanent magnet motor of the new energy reaction kettle can be designed into direct drive load equipment due to the low speed and high torque, the speed and torque requirements required by the load can be met, the complicated mechanical design of the transmission system and the middle link of the processing technology are eliminated, various defects of the induction motor-gear reduction transmission system are fundamentally overcome, and the transmission efficiency of the transmission system is improved.

However, in actual operation, the new energy reaction kettle stirrer causes the actual operation efficiency of the motor system to be in a lower load state for a long time due to unreasonable system matching, long-term low-load operation of equipment, lag of a system adjusting mode and the like, and causes large vibration noise due to the fact that the traditional motor structure adopts an angular contact ball bearing and a deep groove ball bearing structure in the aspects of actual operation working condition or manufacturing process.

Disclosure of Invention

In order to adapt to the complex working condition of a new energy reaction kettle stirrer, energy conservation and high efficiency can be realized, and vibration noise is small, the utility model provides a vertical direct-drive permanent magnet synchronous motor for a new energy reaction kettle. The following technical scheme is adopted:

the vertical direct-drive permanent magnet synchronous motor for the new energy reaction kettle comprises a stator and a rotor, wherein the stator consists of a stator core and a shell, and the rotor consists of a rotor core, a front end cover and a rear end cover;

the stator core is arranged in such a way that the fractional slot windings are embedded on stator punching sheets, and the stator punching sheets have a flat bottom slot structure; the number of slots per phase of each pole of the fractional-slot winding is less than 1;

the rotor core is provided with the front bearing in a matched manner with the front end cover, and is composed of a pair of face-to-face angular contact ball bearings, and the rotor core is provided with the rear bearing in a matched manner with the rear end cover, and is composed of deep groove ball bearings.

Optionally, the rotor core is formed by stacking lamination and is locked by a tensioning screw.

Optionally, the rotor punching sheet in the rotor is in a dovetail groove structure; the rotor punching sheet is arranged in a surface insertion type structure.

Optionally, the front bearing is a fixed end, and the rear bearing is a movable end; the two sides of the pair of angular contact ball bearings and the deep groove ball bearings are clamped and limited through the oil thrower disc and the shaft shoulder of the rotating shaft.

Optionally, the front bearing and the rear bearing are filled with 3# lithium-based lubricating grease.

Optionally, 4 fastening screws are arranged on the circumferences of the matching surfaces of the stator core and the shell.

Optionally, two end surfaces of the stator core, which are matched with the shell, are provided with a stator pressing ring and a stator end plate.

Optionally, an independent fan is connected to the rear end cover.

In summary, the utility model has the following beneficial effects:

1. the utility model provides a vertical direct-drive permanent magnet synchronous motor, which mainly solves the problems of adapting to the complex working condition of a new energy reaction kettle mixer, and realizing energy conservation, high efficiency, small vibration noise, large output torque and small torque pulsation.

2. The reaction kettle stirrer adopts the fractional slot winding, the rotor structure adopts the dovetail slots with reliable structures, and the surface insertion structure can increase the output torque and effectively inhibit the torque pulsation.

3. The utility model provides a vertical direct-drive permanent magnet synchronous motor, wherein in the aspect of transmission, a front bearing adopts a pair of angular contact ball bearings which are arranged face to face, and a rear bearing adopts a deep groove ball bearing, so that the stability of the whole structure can be improved, and the vibration noise of the whole machine can be reduced.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the motor of the present embodiment;

fig. 2 is a schematic structural view of a stator core lamination assembly.

Reference numerals illustrate: 1. a rotor; 2. a front end cover; 3. a rotor core; 4. a rear end cover; 5. angular contact ball bearings; 6. a stator core; 7. a housing; 8. a stator pressing ring; 9. a stator end plate; 10. a blower; 11. deep groove ball bearings; 12. an oil slinger.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-2.

The embodiment of the utility model discloses a vertical direct-drive permanent magnet synchronous motor for a new energy reaction kettle, which comprises a stator and a rotor 1, wherein the stator is composed of a stator core 6 and a shell 7, and the rotor 1 is composed of a rotor core 3, a front end cover 2 and a rear end cover 4.

As shown in fig. 1, the rotor 1 is formed by sequentially passing a rotating shaft through a front end cover 2, a rotor core 3 and a rear end cover 4, and preferably, the rotor core 3 is formed by laminating and locking by a tensioning screw.

The rotor core 3 and the front end cover 2 are matched and provided with a front bearing on the rotating shaft, the front bearing is preferably composed of a pair of opposite angular contact ball bearings 5, the front bearing is a fixed end, the left side of the inner diameter of the pair of angular contact ball bearings 5 is limited by an oil thrower 12, the oil thrower 12 is fixed through a round nut, and the round nut is provided with a lock washer. The outer diameter circumferential side of a pair of angular contact ball bearings 5 is limited by the front end cover 2. The right side of the inner diameter of the pair of angle contact ball bearings 5 is limited by the shaft shoulder of the rotating shaft.

The rotor core 3 and the rear end cover 4 are matched and provided with rear bearings on the rotating shaft, the rear bearings are preferably heavy series deep groove ball bearings 11, the rear bearings are used as free ends, the left side of the inner diameter of each deep groove ball bearing 11 is limited by a rotating shaft shoulder, the right side of the inner diameter of each deep groove ball bearing 11 is limited by an oil thrower 12, the oil thrower 12 is limited by a bearing retainer ring on an avoidance hole on the shaft, and the left side and the right side of the outer diameter of each deep groove ball bearing 11 are not limited.

As the optimized front bearing and the rear bearing are filled with 3# lithium-based lubricating grease, the fixed ends of the pair of face-to-face angular contact ball bearings 5 and the floating end of the deep groove ball bearing 11 are adopted to improve the service life of the motor, and the motor has the advantages of low vibration noise, efficiency, high power factor, energy conservation and environmental protection.

As shown in fig. 1, the stator is composed of a stator core 6 and a casing 7, 4 fastening screws are arranged on the circumference of the matching surface of the stator core 6 and the casing 7 due to large transmitted rotation moment, two axial end faces of the stator core 6 are fixed by adopting a stator pressing ring 8 and a stator end plate 9, and an independent fan 10 is preferably connected at the rear end cover 4 of the motor.

The stator core 6 is arranged in a way that a fractional slot winding is embedded on a stator punching sheet, and the stator punching sheet has a flat bottom slot structure; the number of slots per phase of each pole of the fractional-slot winding is less than 1; the fractional slot winding is adopted, so that the cogging torque is reduced, and the torque pulsation is minimized while the large torque is output.

In fig. 2, the electromagnetic scheme selected punch combination attenuates the 5, 7 harmonics by a preferably polar slot fit, preferably polar arc coefficient. The main component in the cogging torque is a fundamental wave, and the amplitude of the fundamental wave is smaller as the period value of the fundamental wave is larger. The rotor 1 of the permanent magnet motor rotates for one circle, and the fundamental wave period gamma of the cogging torque is equal to the least common multiple Np of the stator slot number Q and the pole number 2P of the rotor 1.

Fractional-slot winding motors with the same slot count have a fundamental cogging torque that is d times longer than that of integer-slot winding motors, thus indicating that fractional-slot windings are advantageous for reducing cogging torque. The combination adopts fractional slot windings with the slot number of each pole being less than 1, weakens the cogging torque, and minimizes torque pulsation while outputting large torque.

Compared with the prior art, the utility model has the beneficial effects that:

according to the new energy reaction kettle vertical direct-drive permanent magnet synchronous motor, the angular contact ball bearing 5 is additionally arranged at the original front bearing angular contact ball bearing 5, and the axial limit with a simple structure is matched, so that the whole motor has the advantages of good running stability and low vibration noise. The adopted fractional slot winding electromagnetic scheme can meet the requirements of low speed and large torque, has small torque pulsation and can meet the complex use condition of the new energy reaction kettle.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. A new forms of energy reation kettle is with vertical permanent magnet synchronous motor that directly drives, its characterized in that: the motor comprises a stator and a rotor, wherein the stator consists of a stator core and a shell, and the rotor consists of a rotor core, a front end cover and a rear end cover which are penetrated by a rotating shaft in sequence;

2. The vertical direct-drive permanent magnet synchronous motor for new energy reaction kettles of claim 1, wherein: the rotor core is formed by laminating lamination and is locked by a tensioning screw rod.

3. The vertical direct-drive permanent magnet synchronous motor for new energy reaction kettles of claim 1, wherein: the rotor punching sheet in the rotor is in a dovetail groove structure; the rotor punching sheet is arranged in a surface insertion type structure.

4. The vertical direct-drive permanent magnet synchronous motor for new energy reaction kettles of claim 1, wherein: the front bearing is a fixed end, and the rear bearing is a movable end; the two sides of the pair of angular contact ball bearings and the deep groove ball bearings are clamped and limited through the oil thrower disc and the shaft shoulder of the rotating shaft.

5. The vertical direct-drive permanent magnet synchronous motor for the new energy reactor according to claim 4, wherein the vertical direct-drive permanent magnet synchronous motor is characterized in that: and the front bearing and the rear bearing are filled with 3# lithium-based lubricating grease.

6. The vertical direct-drive permanent magnet synchronous motor for new energy reaction kettles of claim 1, wherein: the circumference of the matching surface of the stator core and the shell is fixed by 4 fastening screws.

7. The vertical direct-drive permanent magnet synchronous motor for the new energy reactor according to claim 6, wherein the vertical direct-drive permanent magnet synchronous motor is characterized in that: and two end surfaces of the stator core, which are matched with the shell, are provided with a stator pressing ring and a stator end plate.

8. The vertical direct-drive permanent magnet synchronous motor for new energy reaction kettles of claim 1, wherein: and the rear end cover is connected with an independent fan.