CN110994868B

CN110994868B - High-speed motor structure with internal ventilation cooling

Info

Publication number: CN110994868B
Application number: CN201911357956.6A
Authority: CN
Inventors: 邓程亮; 陆细彪; 陈晶晶
Original assignee: Mc Motor Technology (shenzhen) Co ltd
Current assignee: Mc Motor Technology (shenzhen) Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-06-08
Anticipated expiration: 2039-12-25
Also published as: CN110994868A

Abstract

The invention discloses a high-speed motor structure with internal ventilation and cooling, which comprises a shell, a front end cover, a rear end cover, a rotating shaft, a motor rotor, a motor stator and an air source interface, wherein the shell is provided with a front end cover and a rear end cover; the front end and the rear end of the shell are respectively provided with a front end cover and a rear end cover, and a cavity for accommodating the rotating shaft, the motor rotor and the motor stator is arranged in the shell; the rotating shaft is arranged in the shell through a bearing, the motor rotor is sleeved on the outer ring of the rotating shaft, and the motor stator is sleeved on the outer ring of the motor rotor and a gap is formed between the motor stator and the motor rotor; the rear end cover is connected with the air source interface and inputs an air source into the high-speed motor structure through the air source interface; the periphery of the shell is provided with a plurality of through holes for outputting an air source in the high-speed motor structure. Heat dissipation airflow is introduced into the motor structure through an external air source, and the outer surface of the motor rotor and the surface of the inner cavity of the motor stator are effectively dissipated in time; the heat dissipation airflow flow paths are flexible and various, and the air source input and output heat dissipation requirements of different installation positions and operation environments are met.

Description

High-speed motor structure with internal ventilation cooling

Technical Field

The invention relates to a heat dissipation structure of a high-power-density motor, in particular to a high-speed motor structure with internal ventilation cooling.

Background

The high-speed motor is used as mechanical power equipment which runs at a high speed, electric energy is quickly converted into mechanical energy in the working process, but due to the characteristic of high-speed running of the high-speed motor, part of the electric energy which is not completely converted into the mechanical energy in the working process can be converted into heat energy to cause the temperature of the motor to rise, the temperature of the motor can continuously rise under the long-time working condition, and when the temperature rises to exceed the insulation grade of the motor, an insulation system of the motor is burnt out to cause the fault of the motor and shorten the service life of the motor. In the motor operation process, normal loss can all appear in stator and rotor and generate heat, if can effectively in time dispel the motor heat away, will be favorable to exerting the load performance of motor, promote motor power density. At present, the heat dissipation method of the high-power motor is generally that a heat dissipation rib is arranged on a machine shell, and a heat dissipation fan is arranged at the tail of the motor to volatilize heat generated in the working process of the motor, so that the working temperature of the motor is controlled within a reasonable range. However, the heat dissipation effect of the heat dissipation method is very small, and especially for the high-speed motor structure, because the power is large, the volume is small, and the heat dissipation area is small, the surplus heat generated by the motor cannot be timely and effectively output to the outside, and the temperature rise still cannot be effectively controlled within a reasonable range.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a high-speed motor structure with internal ventilation and cooling.

In order to achieve the purpose, the invention adopts the following technical scheme:

a high-speed motor structure with internal ventilation and cooling comprises a shell, a front end cover, a rear end cover, a rotating shaft, a motor rotor, a motor stator and an air source interface;

the front end cover and the rear end cover are respectively arranged at the front end and the rear end of the shell, and a cavity for accommodating the rotating shaft, the motor rotor and the motor stator is arranged in the shell; the rotating shaft is arranged in the shell through a bearing, the motor rotor is sleeved on the outer ring of the rotating shaft, and the motor stator is sleeved on the outer ring of the motor rotor and a gap is formed between the motor stator and the motor rotor;

the rear end cover is connected with the air source interface and inputs an air source into the high-speed motor structure through the air source interface; and a plurality of through holes are formed in the periphery of the shell and used for outputting an air source in the high-speed motor structure.

The technical scheme is that a plurality of through holes are formed in the rear of the shell and used for inputting air sources, and a plurality of through holes are formed in the upper portion of the front end cover and used for outputting air sources.

The motor stator is a liquid cooling shell/an air cooling shell with a heat dissipation rib structure/a self cooling shell with a heat dissipation rib structure.

The further technical scheme is that the bearing is a rolling bearing/a sliding bearing/an air suspension bearing/a magnetic suspension bearing.

The technical scheme is that the outer side end of the air source interface is of a flange structure, and a plurality of hole sites are arranged on the periphery of the flange of the air source interface and used for connecting with external air source input equipment.

The further technical scheme is that the through holes are round holes/elliptical holes/square holes/irregular-shaped hole sites.

Compared with the prior art, the invention has the beneficial effects that:

according to the high-speed motor structure with the internal ventilation cooling, the heat dissipation airflow is introduced into the motor structure through the external air source, so that the heat dissipation is timely and effectively carried out on the outer surface of the motor rotor and the inner cavity surface of the motor stator; the cooling airflow flow path comprises a plurality of input and output path modes such as an air source interface input and output of the shell, an input front end cover output at the rear of the shell and the like, is flexible and various, and meets the air source input and output cooling requirements of different installation positions and operation environments; the motor stator is suitable for large-gap motor rotors and motor stators, the internal ventilation and heat dissipation structure can be applied to rotary high-speed mechanical structures such as a fan, a turbine or a vane dragon in an analogy manner, and the motor stator has wide application prospect.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more apparent, the following detailed description will be given of preferred embodiments.

Drawings

FIG. 1 is a three-dimensional isometric view of an internal ventilated cooled high speed motor structure of the present invention;

FIG. 2 is a full cross-sectional view of the structure shown in FIG. 1;

fig. 3 is one of the heat dissipation airflow paths of fig. 2.

Reference numerals

1. A front end cover; 2. a housing; 3. a rear end cap; 4. an air source interface; 5. a bearing chamber; 6. a motor rotor; 7. a motor stator; 8. a rotating shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Referring to fig. 1-3, the present embodiment provides a high-speed motor structure with internal ventilation and cooling, which includes a casing 2, a front end cover 1, a rear end cover 3, a rotating shaft 8, a motor rotor 6, a motor stator 7, and an air source interface 4;

a front end cover 1 and a rear end cover 3 are respectively arranged at the front end and the rear end of the shell 2, and a cavity for accommodating a rotating shaft 8, a motor rotor 6 and a motor stator 7 is arranged in the shell 2; the rotating shaft 8 is arranged in the shell 2 through a bearing, the motor rotor 6 is sleeved on the outer ring of the rotating shaft 8, and the motor stator 7 is sleeved on the outer ring of the motor rotor 6 and is provided with a gap with the motor rotor 6; the rotating shaft 8 is used for outputting motor load.

The rear end cover 3 is connected with the air source interface 4, and inputs an air source into the high-speed motor structure through the air source interface 4; the periphery of the shell 2 is provided with a plurality of through holes for outputting air sources in the high-speed motor structure. A plurality of through-holes (suction hole/venthole) distribute in each inside corner of motor casing 2, conveniently absorb the heat transfer to the heat that each inside corner of motor produced, the uniform heat dissipation of being convenient for.

The rear of the casing 2 is provided with a plurality of through holes for inputting air sources, and the upper part of the front end cover 1 is provided with a plurality of through holes for outputting air sources. In this embodiment, two air source input and output paths are listed, and in the actual work engineering, the air source flowing path further includes other reasonable paths capable of meeting the air flow heat dissipation requirement. The air source input can be automatically sucked into the air source through the air pressure difference between the inside and the outside of the motor, or the air source is input through high-power equipment such as a vacuum air pump, a spiral air pump and the like so as to quickly supply the required heat dissipation air source. The through holes are circular holes/elliptical holes/square holes/irregular-shaped holes, the specific external dimensions of the through holes are not limited, and the fact that the through holes with various shapes meet the air inlet/outlet requirements is also shown in the protection range of the embodiment.

The motor stator 7 is a liquid cooling machine shell/an air cooling machine shell with a heat dissipation rib structure/a self cooling machine shell with a heat dissipation rib structure. The purpose is to provide multiple motor stator 7 structure in order to adapt to different design demands, satisfies multiple use scenario.

The middle part of the front end cover 1 is provided with a hole site for accommodating the end part of the rotating shaft 8, and the middle part of the front end cover 1 is also provided with a bearing chamber 5 for installing a bearing to support the rotating shaft 8. The bearing is a rolling bearing/a sliding bearing/an air suspension bearing/a magnetic suspension bearing or other bearings meeting the use requirement.

The outer side end of the air source interface 4 is of a flange structure, and a plurality of hole sites are arranged on the periphery of the flange of the air source interface 4 and used for connecting with external air source input equipment.

In other specific embodiments, the high-speed motor structure provided by the present invention further includes additional cooling fans or cooling fins.

Compared with the prior art, the high-speed motor structure with the internal ventilation cooling structure introduces the heat dissipation airflow into the motor structure through the external air source, and timely and effectively dissipates heat of the outer surface of the motor rotor and the surface of the inner cavity of the motor stator; the cooling airflow flow path comprises a plurality of input and output path modes such as an air source interface input and output of the shell, an input front end cover output at the rear of the shell and the like, is flexible and various, and meets the air source input and output cooling requirements of different installation positions and operation environments; the motor stator is suitable for large-gap motor rotors and motor stators, the internal ventilation and heat dissipation structure can be applied to rotary high-speed mechanical structures such as a fan, a turbine or a vane dragon in an analogy manner, and the motor stator has wide application prospect.

The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.

Claims

1. A high-speed motor structure with internal ventilation and cooling is characterized by comprising a shell, a front end cover, a rear end cover, a rotating shaft, a motor rotor, a motor stator and an air source interface;

the rear end cover is connected with the air source interface and inputs an air source into the high-speed motor structure through the air source interface; the periphery of the shell is provided with a plurality of through holes for outputting an air source in the high-speed motor structure; a plurality of through holes are formed in the rear of the shell and used for inputting an air source, and a plurality of through holes are formed in the upper portion of the front end cover and used for outputting the air source;

the outer side end of the air source interface is of a flange structure, and the periphery of the flange of the air source interface is provided with a plurality of hole sites for connecting with external air source input equipment;

the motor stator is a liquid cooling shell/an air cooling shell with a heat dissipation rib structure/a self cooling shell with a heat dissipation rib structure;

the bearing is a rolling bearing, a sliding bearing, an air suspension bearing or a magnetic suspension bearing;

the through holes are round holes, elliptical holes, square holes or hole positions with irregular shapes.