CN116566152A - Double-layer structure permanent magnet outer rotor motor - Google Patents

Abstract

The invention relates to the technical field of motors, in particular to a permanent magnet outer rotor motor with a double-layer structure, which comprises a shell and a motor shaft arranged in the shell, wherein a fan blade is arranged in the middle of the motor shaft, outer rotors are arranged on the motor shafts on two sides of the fan blade, a front end cover and a rear end cover are respectively arranged at the left end and the right end of the shell, inner stators sleeved on the motor shaft are respectively arranged at the inner sides of the front end cover and the rear end cover, mounting grooves are respectively arranged at the inner sides of the front end cover and the rear end cover, an inner stator fixing seat is fixedly arranged at the outer side of the inner stator, and a connecting sleeve which extends into the mounting grooves and is fixedly connected with the inner stator fixing seat is arranged at the outer end of the inner stator fixing seat. Through setting up the fan blade on the motor shaft, and set up two external rotors in the fan blade both sides, simultaneously, equipped with the interior stator that corresponds with the external rotor, utilize the double external rotor structure of same diameter to realize power doubling, realize the promotion of motor output under the same volume.

Description

A double-layer structure permanent magnet outer rotor motor

technical field

The invention relates to the technical field of motors, in particular to a double-layer structure permanent magnet outer rotor motor.

Background technique

Permanent magnet external rotor motor, due to its special structure, the rotor is larger than the stator (traditionally, the rotor is smaller than the stator), the diameter of the rotor bracket is large, the thickness of the rotor bracket is thin, the rotor bracket and the rotor shaft can only be fixed on one side, the rotor The greater the ratio between the diameter of the bracket and the diameter of the shaft, the more difficult it is to control the concentricity, verticality, concentricity, and verticality. If the control is not good, the vibration of the motor will be relatively large. The design of permanent magnet motors is developing in the direction of high speed. The larger the speed, the greater the vibration;

Common permanent magnet external rotor motors on the market are relatively small in power. The reason is that the diameter of the outer rotor bracket is too large in proportion to its shaft diameter, so it is difficult to achieve high power. The greater the power, the larger the diameter of the outer rotor bracket. If Using a double-layer structure on the basis of the existing single-layer structure can well solve the high-power requirements. The smaller the ratio of the diameter of the outer rotor bracket to the diameter of the shaft, the smaller the vibration caused by non-concentricity and non-perpendicularity. , the frequency converter of the permanent magnet variable frequency motor, the higher the power, the higher the cost. In order to solve this contradiction, a double-layer permanent magnet outer rotor motor is proposed to solve the above problems.

Contents of the invention

The object of the present invention is to provide a double-layer structure permanent magnet external rotor motor to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A double-layer structure permanent magnet external rotor motor, including a casing and a motor shaft arranged inside the casing, a fan blade is arranged in the middle of the motor shaft, and outer rotors are arranged on the motor shafts on both sides of the fan blade;

The left and right ends of the casing are respectively provided with a front end cover and a rear end cover, and the insides of the front end cover and the rear end cover are both provided with inner stators sleeved on the motor shaft.

As a preferred solution, both the inside of the front end cover and the rear end cover are provided with mounting grooves, the outside of the inner stator is fixedly provided with an inner stator fixing seat, and the outer end of the inner stator fixing seat is provided with a connecting sleeve extending into the installation groove and fixed thereto.

As a preferred solution, a wave washer is arranged between the connecting sleeve and the inner wall of the installation groove, and a bearing is arranged inside the connecting sleeve, and both ends of the motor shaft extend out of the front end cover and the rear end cover respectively after passing through the bearing.

As a preferred solution, a base is provided on the top of the casing, a control box is fixedly installed on the base, a control module is provided inside the control box, and the control interface of the control module protrudes upwards out of the control box cover, and the two outer rotors The control lines are respectively electrically connected to the control modules.

As a preferred solution, an air intake cover is fixedly arranged on the rear end cover, the right end of the motor shaft extends into the air intake cover, and a cooling fan blade is provided at the end.

It can be seen from the above-mentioned technical solutions provided by the present invention that the double-layer structure permanent magnet outer rotor motor provided by the present invention has the beneficial effects of: setting the fan blades on the motor shaft and setting two outer rotor motors on both sides of the fan blades. The rotor, at the same time, is equipped with an inner stator corresponding to the outer rotor, which doubles the power by utilizing the double outer rotor structure of the same diameter, reduces the volume of the permanent magnet outer rotor motor, and enhances the output power.

Description of drawings

Fig. 1 is the overall structure schematic diagram of a kind of double-layer structure permanent magnet external rotor motor of the present invention;

Fig. 2 is an exploded view of a double-layer structure permanent magnet outer rotor motor of the present invention.

In the figure: 1. Shell; 12. Base; 2. Motor shaft; 21. Fan blade; 22. Outer rotor; 3. Inner stator; 31. Control line; 4. Inner stator fixing seat; 41. Connecting sleeve; 5 , bearing; 6, wave washer; 7, front cover; 71, installation groove; 8, rear end cover; 9, cooling blade; 91, intake cover; 10, control box; 101, control box cover; module; 103, a control interface.

Implementation

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

As shown in Figure 1-2, the embodiment of the present invention provides a double-layer structure permanent magnet outer rotor motor, which includes a casing 1 and a motor shaft 2 arranged inside the casing 1, and a fan blade 21 is arranged in the middle of the motor shaft 2. And the motor shaft 2 on both sides of the fan blade 21 is provided with an outer rotor 22, and the left and right ends of the casing 1 are respectively provided with a front end cover 7 and a rear end cover 8, and the inner sides of the front end cover 7 and the rear end cover 8 are provided with sleeves on the motor. Inner stator 3 on shaft 2.

In the above-mentioned device, the inner side of the front end cover 7 and the rear end cover 8 are provided with a mounting groove 71, the outer side of the inner stator 3 is fixedly provided with an inner stator fixing seat 4, and the outer end of the inner stator fixing seat 4 is provided with a mounting groove 71 extending into the mounting groove 71. Fixed connecting sleeve 41, a wave washer 6 is arranged between the connecting sleeve 41 and the inner wall of the installation groove 71, and a bearing 5 is arranged inside the connecting sleeve 41, and the two ends of the motor shaft 2 extend through the bearing 5 and extend out of the front cover 7 and the rear end respectively Cover 8 outside.

In the above device, a base 12 is provided on the top of the housing 1, a control box 10 is fixedly installed on the base 12, a control module 102 is arranged inside the control box 10, and the control interface 103 of the control module 102 protrudes upwards out of the control box cover 101 , and the control lines 31 of the two outer rotors 22 are electrically connected to the control module 102 respectively.

In the above-mentioned device, an air intake cover 9 is fixedly arranged on the rear end cover 8, and the right end of the motor shaft 2 extends into the air intake cover 9 and a heat dissipation fan 9 is arranged at the end.

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings:

Please refer to Figure 1-2, including the casing 1 and the motor shaft 2 arranged inside the casing 1, the fan blade 21 is arranged in the middle of the motor shaft 2, and the outer rotor 22 is arranged on the motor shaft 2 on both sides of the fan blade 21 , the left and right ends of the housing 1 are respectively provided with a front end cover 7 and a rear end cover 8, the inside of the front end cover 7 and the rear end cover 8 are provided with an inner stator 3 set on the motor shaft 2, and the inside of the front end cover 7 and the rear end cover 8 Both are provided with installation grooves 71, and the outer side of the inner stator 3 is fixedly provided with an inner stator fixing seat 4, and the outer end of the inner stator fixing seat 4 is provided with a connecting sleeve 41 extending into the installation groove 71 and fixed thereto, and the connecting sleeve 41 and the installation groove 71 A wave washer 6 is arranged between the inner walls of the connecting sleeve 41, and a bearing 5 is arranged inside the connecting sleeve 41, and the two ends of the motor shaft 2 pass through the bearing 5 and extend out of the front end cover 7 and the rear end cover 8 respectively;

Among them, the structure of double outer rotors 22 is set. During the operation of the motor, the two outer rotors 22 rotate at the same frequency, which greatly improves the output power of the motor. On the end cover 8, and the control lines 31 of the two inner stators 3 protrude from the base 12;

Further, the top of the housing 1 is provided with a base 12, the base 12 is fixedly provided with the control box 10, the inside of the control box 10 is provided with a control module 102, and the control interface 103 of the control module 102 protrudes upwards out of the control box cover 101, and The control lines 31 of the two outer rotors 22 are respectively electrically connected to the control module 102, wherein the control module 102 uses an IGBT chip to ensure that the two outer rotors 22 and the inner stator 3 are at the same frequency, and only need to be driven by a low-power frequency converter. High power output of the motor can be realized.

In this embodiment, the rear end cover 8 is fixedly provided with an air intake cover 9, the right end of the motor shaft 2 extends into the air intake cover 9 and the end is provided with a heat dissipation blade 9, and the heat dissipation blade 9 rotates synchronously with the motor shaft 2 , for heat dissipation of the motor.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (5)

1. A double-layer structure permanent magnet external rotor motor, comprising a casing (1) and a motor shaft (2) arranged inside the casing (1), characterized in that: the middle position of the motor shaft (2) is provided with a wind blade (21), and the motor shaft (2) on both sides of the fan blade (21) is provided with an outer rotor (22); The left and right ends of the casing (1) are respectively provided with a front end cover (7) and a rear end cover (8). on the inner stator (3). 2. A double-layer structure permanent magnet outer rotor motor according to claim 1, characterized in that: the inside of the front end cover (7) and the rear end cover (8) are both provided with installation grooves (71), the The outer side of the inner stator (3) is fixedly provided with an inner stator fixing seat (4), and the outer end of the inner stator fixing seat (4) is provided with a connecting sleeve (41) extending into the installation groove (71) and fixed thereto. 3. A double-layer structure permanent magnet outer rotor motor according to claim 2, characterized in that: a wave washer (6) is provided between the connecting sleeve (41) and the inner wall of the installation groove (71), so that The connecting sleeve (41) is provided with a bearing (5) inside, and the two ends of the motor shaft (2) pass through the bearing (5) and protrude out of the front end cover (7) and the rear end cover (8) respectively. 4. A double-layer structure permanent magnet outer rotor motor according to claim 1, characterized in that: a base (12) is provided on the top of the casing (1), and a base (12) is fixedly installed on the base (12). The control box (10), the control module (102) is arranged inside the control box (10), and the control interface (103) of the control module (102) protrudes upwards out of the control box cover (101), and the two outer rotors The control lines (31) of (22) are respectively electrically connected to the control module (102). 5. A double-layer structure permanent magnet outer rotor motor according to claim 1, characterized in that: the rear end cover (8) is fixed with an air intake cover (9), and the motor shaft (2) The right end protrudes into the air intake cover (9) and the end is provided with cooling fan blades (9).