CN212543463U

CN212543463U - Medium-power outer rotor permanent magnet motor for ventilation

Info

Publication number: CN212543463U
Application number: CN202021707573.5U
Authority: CN
Inventors: 杨勇; 黄建军; 杨晓波
Original assignee: Zhuzhou Robot Motor Co ltd
Current assignee: Zhuzhou Robot Motor Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-02-12
Anticipated expiration: 2030-08-14

Abstract

The utility model provides a ventilation is with well power external rotor permanent-magnet machine belongs to external rotor permanent-magnet machine technical field. The permanent magnet motor comprises an upper cover, a machine shell, a stator assembly, a bottom cover, a support, a deep groove ball bearing and a permanent magnet; the stator assembly consists of a stator core and a stator sleeve, the stator sleeve is divided into a front sleeve and a rear sleeve, the front sleeve and the rear sleeve are connected with the stator core through screws, and an intermediate shaft structure is omitted in the middle of the sleeves; the motor shaft, the rotor sleeve, the permanent magnet and the steel cylinder form a rotor part of the double-layer rotor motor; permanent magnets are attached to the inner side face of the shell along the annular direction according to a rule and are connected with an upper cover and a bottom cover of the motor through screws; the upper cover and the bottom cover are both rotationally connected with the stator sleeve through a deep groove ball bearing; the stator rear sleeve is connected to the support through a bolt, and the support is provided with a mounting hole which can be fixed at a mounting position. The utility model discloses a permanent-magnet machine has cancelled middle motor shaft, has simplified the motor structure, has optimized the heat dissipation passageway, has promoted the heat dispersion of motor.

Description

Medium-power outer rotor permanent magnet motor for ventilation

Technical Field

The utility model relates to a ventilation is with well power external rotor permanent-magnet machine belongs to external rotor permanent-magnet machine technical field.

Background

The motors used in the field of conventional ventilation fans are mainly asynchronous motors, and motors used in fans with low power of 1kW or less have been replaced with brushless motors, but in medium power fans, asynchronous motors are mainly used. Because of the low efficiency of the asynchronous motor and the permanent magnet synchronous motor, the permanent magnet synchronous motor is applied more and more in the fan industry along with the improvement of the national requirement on energy conservation. The motor that conventional fan used is mostly inner rotor motor, and inner rotor motor need increase a blade supporting disk in the fan blade installation and fix the blade, and outer rotor motor's structure is more fit for the installation requirement of fan, and the blade can direct mount at motor casing terminal surface, and the installation is more simple and convenient. Therefore, it is necessary to design an outer rotor motor to solve the above problems.

Disclosure of Invention

The utility model aims at solving the problem that above-mentioned prior art exists, and then provide a ventilation is with well power external rotor permanent-magnet machine.

The utility model aims at realizing through the following technical scheme:

a middle-power outer rotor permanent magnet motor for ventilation comprises an upper cover, a shell, a stator assembly, a bottom cover, a support, two deep groove ball bearings, a permanent magnet and an elastic retainer ring, wherein the stator assembly consists of a stator iron core, a front sleeve and a rear sleeve; the front sleeve and the rear sleeve are fixed on the stator core through bolts and are respectively and rotatably connected to the upper cover and the bottom cover through two deep groove ball bearings; the permanent magnet is attached to the inner side face of the machine shell in the circumferential direction, the bottom cover is connected to the support through the bolt, the support is provided with a mounting hole, and an elastic check ring is arranged between the front sleeve and the bottom cover.

The utility model has the advantages that: 1. the design of the existing motor shaft is cancelled, so that the structure of the motor is greatly simplified, the weight of the motor is reduced, and the stability of the motor is improved; because the air volume channel is enlarged, the heat dissipation performance of the motor is greatly improved. 2. By using the outer rotor motor, the blades can be directly arranged on the outer end face of the motor, so that the installation steps of the motor are simplified, and the running performance of the motor is improved.

Drawings

Fig. 1 is a schematic structural view of the middle power outer rotor permanent magnet motor for ventilation of the present invention.

In the drawing, reference numerals, 1 denotes an upper cover, 2 denotes a housing, 3 denotes a stator assembly, 4 denotes a bottom cover, 5 denotes a support, 6 denotes a deep groove ball bearing, 7 denotes a permanent magnet, 8 denotes a mounting hole, 9 denotes a circlip, 31 denotes a stator core, 32 denotes a front sleeve, and 33 denotes a rear sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the ventilation medium-power outer rotor permanent magnet motor according to the present embodiment includes: the stator assembly comprises an upper cover 1, a shell 2, a stator assembly 3, a bottom cover 4, a support 5, a deep groove ball bearing 6 and a permanent magnet 7, wherein the stator assembly 3 consists of a stator core and a stator sleeve, the stator sleeve is divided into a front sleeve and a rear sleeve, the front sleeve and the rear sleeve are connected with the stator core through screws, and the original intermediate shaft structure is omitted in the middle of the sleeve; the motor shaft, the rotor sleeve, the permanent magnet 7 and the steel cylinder form a rotor part of the double-layer rotor motor; permanent magnets 7 are attached to the inner side face of the shell 2 along the annular direction according to a regular rule and are connected with the upper cover 1 and the bottom cover 4 of the motor through screws, so that a rotor part of the motor is formed; the upper cover 1 and the bottom cover 4 are both rotationally connected with the stator sleeve through a deep groove ball bearing 6; the stator rear sleeve is connected to the support 5 through a bolt, and the support 5 is provided with a mounting hole 8 which can be fixed at a mounting position.

Specifically, in this embodiment, the stator assembly 3 is composed of a stator core 31, a front sleeve 32 and a rear sleeve 33; the front sleeve 32 and the rear sleeve 33 are fixed on the stator core 31 through bolts, and the front sleeve 32 and the rear sleeve 33 are rotatably connected to the upper cover 1 and the bottom cover 4 through the deep groove ball bearing 6; an annular groove is reserved at the joint of the front sleeve 32 and the stator core 31, so that the stator core 31 can be positioned, and the groove is slightly larger than the circumferential thickness of the stator core 31; the center shaft is not inserted between the front sleeve 32 and the rear sleeve 33, so that the heat radiation performance of the motor is optimized. The armature has an inner ring and an outer ring; the inner ring is inserted between the steel cylinder and the permanent magnets 7 positioned on the inner side of the rotor sleeve, the outer ring is sleeved on the outer side of the permanent magnets 7 positioned on the outer side of the rotor sleeve, air gaps are reserved between the inner ring and the permanent magnets 7 positioned on the inner side and between the outer ring and the permanent magnets 7 positioned on the outer side, and therefore the power density of the motor is improved.

Further, the casing 2, the upper cover 1 and the bottom cover 4 together form a rotor part of the permanent magnet motor. The upper cover 1 and the bottom cover 4 are fixed on the casing 2 through bolts, and rabbets are reserved at the joints of the upper cover 1 and the bottom cover 4 and the casing 2 to position the casing 2, so that the coaxiality of the motor is improved.

In order to facilitate the installation of the blades, the upper cover 1 adopts a deep groove ball bearing 6 at the joint with the front sleeve 32, the deep groove ball bearing is fixedly connected to the machine shell 2 through a screw, and a screw hole at the position is designed to be a counter bore; the mounting holes for the blades are left on the end face of the upper cover 1, and can be adjusted according to the number of the blades, and the number of the mounting holes is generally selected to be 4, 5 or 6.

The front sleeve 32 and the rear sleeve 33 are provided with shoulders for positioning the bearings. The bottom cover 4 is connected with the rear sleeve 33 through a deep groove ball bearing 6, and a 3mm groove is formed in the deep groove ball bearing 6 for installing and elastically blocking the ring 9 so as to prevent the bottom cover 4 from axially moving.

The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A ventilation is with outer rotor permanent-magnet machine of medium power, including upper cover (1), chassis (2), stator assembly (3), bottom cover (4), support (5), two deep groove ball bearings (6), permanent magnet (7) and circlip (9), characterized by that, the said stator assembly (3) is made up of stator core (31), front bush (32) and back bush (33); the front sleeve (32) and the rear sleeve (33) are fixed on the stator core (31) through bolts, and the front sleeve (32) and the rear sleeve (33) are respectively connected to the upper cover (1) and the bottom cover (4) in a rotating mode through two deep groove ball bearings (6); permanent magnet (7) are pasted along the hoop to the medial surface of casing (2), and bottom (4) pass through bolted connection on support (5), and it has mounting hole (8) to open on support (5), is equipped with circlip (9) between preceding sleeve (32) and bottom (4).

2. Ventilation medium power external rotor permanent magnet machine according to claim 1, characterized in that permanent magnets (7) are connected with the casing (2) by screws.

3. Ventilation medium power external rotor permanent magnet machine according to claim 1, characterized in that permanent magnets (7) are attracted to the casing (2) by magnetic force.