CN213072266U

CN213072266U - Annular permanent magnet direct drive motor and rotary equipment

Info

Publication number: CN213072266U
Application number: CN202022457241.2U
Authority: CN
Inventors: 蔺代运; 陈延涛
Original assignee: Hunan Dongde Industrial Technology Co ltd
Current assignee: Hunan Dongde Industrial Technology Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-04-27
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses an annular permanent-magnet direct drive motor and rotary equipment, the annular permanent-magnet direct drive motor comprises a stator and a rotor, at least one end of a stator shell is provided with an annular guide chute, and the central axis of the guide chute is superposed with the rotary axis of the rotor; at least three rigid supports are uniformly and fixedly arranged on the rotor along the circumferential direction of the rotor, and each rigid support is provided with a sliding block which is matched and slidably connected with the guide sliding groove; or, at least one end of the rotor is provided with an annular guide sliding groove, at least three rigid supports are uniformly and fixedly arranged on the stator shell along the circumferential direction of the stator shell, and each rigid support is provided with a sliding block which is matched and slidably connected with the guide sliding groove. The problem that the air gap is difficult to stably keep in the operation of annular permanent magnet direct drive motor can be solved.

Description

Annular permanent magnet direct drive motor and rotary equipment

Technical Field

The utility model relates to a directly drive the motor, especially relate to an annular permanent magnetism directly drives motor and slewing equipment.

Background

At present, large-sized rotary equipment (such as a ball mill, a cylindrical mixer, a dryer and the like) in the industrial field is driven by adopting a transmission form of a three-phase asynchronous motor, a hydraulic coupler (a coupler), a speed reducer/an auxiliary transmission speed reducer, a small gear ring, a large gear ring and other auxiliary devices (a bearing seat, a supporting roller and a baffle wheel).

In order to solve the above problems, for example, patents CN201621305078.5, CN201621301043.4 and the like disclose technical schemes that an annular permanent magnet direct drive motor couples a rotor and a cylinder, fixes a stator housing, and directly drives the cylinder to work, so that the original motor, a coupler, a speed reducer and a large and small gear ring transmission chain can be omitted, the transmission efficiency is greatly improved, and the energy consumption and the later maintenance cost are reduced.

When the permanent magnet motor works, the stator does not rotate, and the rotor rotates, so that air gaps are required to exist, and the sizes of the air gaps are different according to different motor structure types. The size of the air gap determines the size of magnetic flux, and if the air gap is large, the magnetic leakage is large, and the efficiency of the motor is reduced; the air gap is too small and is easy to sweep the stator bore. However, after the air gap is adjusted and the annular permanent magnet direct drive motor runs for a period of time, the rolling bearing in the bearing seat of the rotary cylinder body is abraded, the rotary cylinder body is rigidly connected with the rotor of the annular permanent magnet direct drive motor, so that the position and the size of the rotary cylinder body relative to the stator shell are changed, and the air gap between the stator and the rotor is also changed, so that the transmission efficiency is unstable, even the stator sweeps the chamber, the motor is failed, and the running cannot be performed.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide an annular permanent magnetism directly drives motor and slewing equipment aims at solving the annular permanent magnetism and directly drives the problem that the motor in service air gap is difficult to stably keep.

In order to solve the technical problem, the following technical scheme is adopted in the application:

the annular permanent magnet direct-drive motor comprises a stator and a rotor, wherein the stator is sleeved outside the rotor, an air gap is formed between the stator and the rotor, a stator shell is fixedly arranged outside the stator, at least one end of the stator shell is provided with an annular guide chute, and the central axis of the guide chute is superposed with the rotation axis of the rotor;

at least three rigid supports are uniformly and fixedly arranged on the rotor along the circumferential direction of the rotor, and each rigid support is provided with a sliding block which is matched and slidably connected with the guide sliding groove; in the alternative, the first and second sets of the first,

at least one end of the rotor is provided with an annular guide sliding groove, at least three rigid supports are uniformly and fixedly arranged on the stator shell along the circumferential direction of the stator shell, and each rigid support is provided with a sliding block which is connected with the guide sliding groove in a sliding mode in a matching mode.

Specifically, stator case's bilateral symmetry is equipped with flexible pull rod, flexible pull rod slope sets up and one end is connected with fixing support, the other end with stator case articulates and connects, fixing support is used for connecting ground, flexible pull rod can follow the pole length direction and freely stretch out and draw back.

Specifically, the telescopic pull rod comprises a sleeve and a rod body arranged in the sleeve in a sliding mode, and an elastic element is connected between the rod body and the sleeve.

Specifically, the telescopic pull rod is hinged to the fixed support.

Specifically, when the guide sliding grooves are arranged on the rotor, the guide sliding grooves are arranged at both ends of the rotor;

when the guide sliding groove is arranged on the stator shell, the two ends of the stator shell are respectively provided with the guide sliding groove.

Specifically, the sliding block and/or the rigid support are made of insulating materials.

Specifically, the central axis of the stator coincides with the axis of revolution of the rotor.

Specifically, the rotor includes a rotor support and a permanent magnet disposed on the rotor support.

Specifically, when the guide chute is arranged on the rotor, the guide chute is arranged on the rotor bracket;

when the guide chute is arranged on the stator shell, the rigid support is arranged on the rotor support.

The utility model provides a rotary equipment, includes the strutting arrangement of rotary cylinder and rotary cylinder, the outer cover of rotary cylinder is equipped with above-mentioned annular permanent magnetism and directly drives motor drive, the fixed cover of rotor is established outside the rotary cylinder, fixing support is fixed in subaerial.

Compared with the prior art, the utility model discloses the beneficial effect who has lies in: the sliding block connected with the rotor/stator can only run in the guide sliding groove, and the guide sliding groove and the motor stator shell/rotor are integrated, so that the relative clearance between the stator and the rotor is always kept unchanged, the stability of an air gap value is indirectly ensured, the stability of the air gap value when the motor runs is further ensured, the service life of the motor is prolonged, and the maintenance cost of the motor is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of an annular permanent magnet direct drive motor provided in embodiment 1 of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

wherein: 1-a stator; 2-a rotor; 201-rotor support; 202-a permanent magnet; 3-a stator housing; 4-a guide chute; 5-a rigid support; 6-a slide block; 7-a telescopic pull rod; 8-fixing the support.

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 efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1 and 2, an annular permanent magnet direct drive motor comprises a stator 1 and a rotor 2, wherein the stator 1 is sleeved outside the rotor 2, an air gap is formed between the stator 1 and the rotor 2, a stator shell 3 is fixedly arranged outside the stator 1, at least one end of the stator shell 3 is provided with an annular guide chute 4, the central axis of the guide chute 4 coincides with the rotation axis of the rotor, at least three rigid supports 5 are uniformly distributed and fixedly arranged on the rotor 2 along the circumferential direction of the rotor, and each rigid support 5 is provided with a sliding block 6 which is in sliding connection with the guide chute 4 in a matching mode. As for the specific structure of the stator 1 and the rotor 2, any known structure can be adopted, which is not described in detail herein, and the number of the rigid supports 5 can be three, four or more.

In this application embodiment, when rotor 2 rotates, will drive the slider 6 with rotor 2 hookup and move in direction spout 4, and direction spout 4 becomes an organic whole again with motor stator shell 3, so relative clearance always keeps unchangeable between the stator and the rotor, indirectly guarantees the stability of air gap value, and then ensures the stability of air gap value when the motor operation, extension motor life, reduces the maintenance cost of motor.

When the motor of above-mentioned embodiment is applied to rotary equipment such as ball mill, because of the rotor 2 that rotary cylinder body and annular permanent magnetism directly drive the motor be rigid connection, can lead to the relative stator shell 3 of rotary cylinder body to appear the change of position size, at this moment, the weight of whole rotary cylinder body is whole to lean on rigid support 5 to support, is broken by the stretch for avoiding rigid support 5, must choose the rigid support 5 of superhigh intensity for use, and this has increased the cost of manufacture of motor undoubtedly.

In order to solve the above problems, in some possible embodiments, telescopic pull rods 7 are symmetrically arranged on two sides of the stator housing 3, the telescopic pull rods 7 can freely extend and retract along the rod length direction, the telescopic pull rods 7 are obliquely arranged, one end of each telescopic pull rod is hinged to a fixed support 8, the other end of each telescopic pull rod is hinged to the stator housing 3, and the fixed support 8 is fixedly connected with the ground through bolts when the motor is installed. In this way, when the annular permanent-magnet direct-drive motor is applied to rotary equipment such as a ball mill and the like, even if the rolling bearing in the bearing seat of the rotary cylinder of the rotary equipment is worn, the stator 1 and the rotor 2 of the motor can synchronously move, the position size of the rotary cylinder relative to the stator shell 3 is always unchanged, and the requirement on the strength of the rigid support 5 can be greatly reduced while the air gap between the stator 1 and the rotor 2 is kept constant.

Specifically, the telescopic pull rod 7 comprises a sleeve and a rod body, one end of the rod body is arranged in the sleeve in a sliding mode, and an elastic element is connected between the bottom end of the rod body and the bottom end of the sleeve; wherein, the elastic element can adopt a spiral spring, a rubber spring and the like.

It will be appreciated that in practical design, guide runners 4 are provided on both end faces of the stator housing 3. The mode can ensure that the rotor 2 is stably stressed and the problems of axial movement and the like can not occur. In this embodiment, the number of the rigid brackets 5 on both end surfaces of the stator housing 3 is 16. In addition, the sliding block 6 is rotatably connected with the rigid support 5 through a rotating shaft, and the axis of the rotating shaft is parallel to the rotation axis of the rotor 2, so that the sliding of the sliding block 6 in the guide sliding groove 4 is rolling sliding, and the sliding resistance can be effectively reduced.

In some embodiments, the slider 6 and/or the rigid support 5 are made of an insulating material. The slider 6 and/or the rigid support 5 are made of insulating materials, so that the insulation of a stator and a rotor of the motor and the stability of operation can be ensured, when the central axis of the stator 1 is coincident with the rotation axis of the rotor 2, the width consistency of all parts of an air gap can be ensured, the stability of the operation of the motor is ensured, the rotor 2 generally comprises a rotor support 201 and a permanent magnet 202 arranged on the rotor support 201, and the rigid support 5 is fixedly arranged on the rotor support 201.

Example 2

Different from the embodiment 1, in the embodiment, the guide sliding grooves 4 are arranged on the rotor 2, specifically, on the rotor support 201 of the rotor 2, and in order to ensure uniform stress, the guide sliding grooves 4 are arranged at both ends of the rotor support 201; correspondingly, at least three rigid supports 5 need to be uniformly distributed and fixedly arranged on the stator shell 3 along the circumferential direction of the stator shell, and a sliding block 6 which is matched with the guide sliding groove 4 and is in sliding connection with the guide sliding groove 5 needs to be arranged on each rigid support 5.

The application also discloses a rotary device, including the strutting arrangement of gyration barrel and gyration barrel, strutting arrangement can adopt antifriction bearing, and the installation is supported through antifriction bearing at the both ends of gyration barrel, and the gyration barrel lies in between two bearings outward that the cover is equipped with the annular permanent magnetism direct drive motor drive that embodiment 1 or embodiment 2 provided, and rotor 2 fixed cover is established outside the gyration barrel, and fixing support 8 is fixed in subaerially. The rotary equipment in this embodiment includes a ball mill, a cylindrical mixer, a dryer, and the like.

Even if the rolling bearing in the bearing seat of the rotary cylinder of the rotary equipment is worn, the rigid support 5 is arranged between the motor stator 1 and the rotor 2, so that the relative clearance between the stator and the rotor 2 can be kept unchanged, the stability of an air gap value is indirectly guaranteed, the stability of the air gap value is further guaranteed when the motor runs, the service life of the motor is prolonged, and the maintenance cost of the motor is reduced.

The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. Annular permanent magnetism directly drives motor, including stator and rotor, the stator cover is established there is air gap outside the rotor and between the two, the stator external fixation is equipped with stator shell, its characterized in that: at least one end of the stator shell is provided with an annular guide chute, and the central axis of the guide chute is superposed with the rotary axis of the rotor;

at least three rigid supports are uniformly distributed and fixed on the rotor along the circumferential direction of the rotor, and each rigid support is provided with a sliding block which is matched and slidably connected with the guide sliding groove; in the alternative, the first and second sets of the first,

at least one end of the rotor is provided with an annular guide sliding groove, at least three rigid supports are uniformly distributed and fixed on the stator shell along the circumferential direction of the stator shell, and each rigid support is provided with a sliding block which is connected with the guide sliding groove in a sliding mode in a matching mode.

2. The annular permanent magnet direct drive motor according to claim 1, wherein: the stator structure is characterized in that telescopic pull rods are symmetrically arranged on two sides of the stator shell, the telescopic pull rods are obliquely arranged, one ends of the telescopic pull rods are hinged to the fixed support, the other ends of the telescopic pull rods are hinged to the stator shell, the fixed support is used for being connected with the ground, and the telescopic pull rods can freely stretch along the rod length direction.

3. The annular permanent magnet direct drive motor according to claim 2, wherein: the telescopic pull rod comprises a sleeve and a rod body arranged in the sleeve in a sliding mode, and a flexible element is connected between the rod body and the sleeve.

4. The annular permanent magnet direct drive motor according to any one of claims 1-3, wherein: when the guide sliding grooves are arranged on the rotor, the guide sliding grooves are arranged at the two ends of the rotor;

5. The annular permanent magnet direct drive motor according to claim 4, wherein: the sliding block and/or the rigid support are made of insulating materials.

6. The annular permanent magnet direct drive motor according to claim 4, wherein: the central axis of the stator coincides with the axis of revolution of the rotor.

7. The annular permanent magnet direct drive motor according to claim 4, wherein: the rotor comprises a rotor support and a permanent magnet arranged on the rotor support.

8. The annular permanent magnet direct drive motor according to claim 7, wherein: when the guide sliding groove is arranged on the rotor, the guide sliding groove is arranged on the rotor bracket;

9. The utility model provides a rotary equipment, includes rotary cylinder and rotary cylinder's strutting arrangement which characterized in that: the rotary cylinder is externally sleeved with the annular permanent magnet direct drive motor drive device as claimed in any one of claims 1 to 8, and the rotor is fixedly sleeved outside the rotary cylinder.