CN219999118U - Asynchronous motor - Google Patents

Abstract

The utility model discloses an asynchronous motor, comprising: the machine comprises a machine base, wherein an installation cavity is formed in the machine base, an air outlet is formed in the top of the machine base, a bottom air inlet and a side air inlet are respectively formed in the bottom and the side of the machine base, and the bottom air inlet, the side air inlet and the air outlet are communicated with the installation cavity; the stator is fixedly arranged in the mounting cavity and comprises a stator iron core and a stator winding embedded in the stator iron core; a rotor rotatably provided inside the stator core; the rotating shaft is fixedly connected with the rotor; and the air exhaust part is arranged at the air outlet and is used for providing air flow power so that the external air of the motor is exhausted through the air inlet and the air outlet. The utility model provides an asynchronous motor with low heating value, which can effectively avoid influencing the physical and psychological safety of users and improve the comfort of the working environment.

Description

Asynchronous motor

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to an asynchronous motor.

Background

The asynchronous motor has the advantages of simple structure, easy manufacture, strong operation stability, high operation efficiency and strong practicability, is applied to various equipment or appliances such as industry, agriculture and the like, and particularly, the high-power asynchronous motor is widely adopted due to strong power and high working efficiency.

The problem that the high-power asynchronous motor commonly exists in the operation is that the heat productivity is large, and the physical and mental safety is seriously influenced for staff in the environment of long-time operation of the motor. Therefore, it is necessary to design and develop an asynchronous motor with a small heat generation amount while securing a high power.

Disclosure of Invention

The utility model provides an asynchronous motor which can effectively reduce heating value.

In order to achieve the technical purpose, the utility model is realized by adopting the following technical scheme:

in one aspect, the present utility model provides an asynchronous machine comprising:

the machine comprises a machine base, wherein an installation cavity is formed in the machine base, an air outlet is formed in the top of the machine base, a bottom air inlet and a side air inlet are respectively formed in the bottom and the side of the machine base, and the bottom air inlet, the side air inlet and the air outlet are communicated with the installation cavity;

the stator is fixedly arranged in the mounting cavity and comprises a stator iron core and a stator winding embedded in the stator iron core;

a rotor rotatably provided inside the stator core;

the rotating shaft is fixedly connected with the rotor;

and the air exhaust part is arranged at the air outlet and is used for providing air flow power so that the external air of the motor is exhausted through the air inlet and the air outlet.

In some embodiments of the present utility model, the bottom air inlet includes a plurality of air inlets, which are all disposed on the bottom surface of the stand and are symmetrically disposed along the stator installation direction; the side air inlets comprise a plurality of air inlets which are all arranged on the side face of the machine base and are symmetrically arranged along the installation direction of the stator. Because the stator winding exposes in the stator both ends, consequently the calorific capacity at both ends is great, consequently set up bottom air intake and lateral part air intake along stator installation direction to the symmetry sets up, helps the air inlet better to take away calorific capacity, improves radiating efficiency.

In some embodiments of the present utility model, an air inlet net is installed on the bottom air inlet, and an air inlet window is installed on the side air inlet. The air inlet net can effectively prevent a large object from being sucked into the motor by the fan, so that the motor is damaged; the air inlet window can effectively prevent dust from falling into the motor while preventing a large object from being sucked into the motor by the fan.

In some embodiments of the utility model, the exhaust part comprises a fan and a volute, wherein an air outlet of the volute is connected with an air guide port, and the air guide port is arranged upwards. The exhaust part is used for radiating heat generated by the asynchronous motor in the use process, and the air guide opening is arranged upwards and can exhaust the heat in a direction away from the motor, so that the heat radiation is further facilitated.

In some embodiments of the present utility model, the fan and the volute both include at least two groups, and a connection design is adopted between the volutes. The conjoined design can effectively reduce the size and weight of the fan while ensuring the air quantity.

In some embodiments of the present utility model, a silencing device is disposed inside the air guide opening. Noise reduction device can reduce the noise of exhaust portion, improves staff operational environment's comfort level.

In some embodiments of the present utility model, a through hole i, a through hole ii, and a through hole iii are respectively formed on the inner wall of the mounting cavity of the base corresponding to the bottom air inlet, the side air inlet, and the air outlet, and the external air of the motor is discharged from the air outlet through the through hole i, the through hole ii, and the through hole iii after entering from the bottom air inlet and the side air inlet. Through hole I, through-hole II and through-hole III set up make the outside air of motor get into inside smooth air flue of formation of motor, take away the heat.

In some embodiments of the present utility model, the stator winding includes two groups, each group including two coils wound alternately around the stator core with unequal numbers of turns. Winding two groups of coils with unequal turns can effectively weaken harmonic content, improve rated efficiency of a motor and reduce heating value of an asynchronous motor.

In some embodiments of the present utility model, a junction box is further disposed on the stand, and two sets of winding connection contacts are disposed in the junction box, and the winding connection contacts are respectively connected with the stator winding. The stator windings are grouped, so that the motor can operate at different powers, and one machine is multipurpose.

In some embodiments of the utility model, the two sets of winding connection joints are connected by a connecting piece. The connection piece is convenient for realizing the on-off of two groups of stator windings, and realizes the change of different powers.

Compared with the prior art, the utility model has the advantages and positive effects that:

(1) The air outlet and the air inlet are formed in the machine base, so that the machine base mounting cavity and the external atmosphere form a communication environment, heat generated by the stator and the rotor in the running process of the motor is conveniently emitted, and the safety of the motor in the running process is improved;

(2) Through setting up exhaust portion, with the inside of motor outside air pumping process motor, take away the heat when the motor is running, significantly reduced the calorific capacity of motor.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of an asynchronous motor according to an embodiment of the present utility model;

FIG. 2 is a side view of an asynchronous motor according to an embodiment of the present utility model;

fig. 3 is a front view of an asynchronous motor according to an embodiment of the present utility model;

fig. 4 is a bottom view of an asynchronous motor according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of an asynchronous motor according to an embodiment of the present utility model;

FIG. 6 is a front view of an exhaust part according to an embodiment of the present utility model;

FIG. 7 is a side view of an exhaust section according to an embodiment of the present utility model;

FIG. 8 is a top view of an exhaust portion according to an embodiment of the present utility model;

FIG. 9 is a schematic view illustrating a structure of an air inlet window according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a frame according to an embodiment of the present utility model;

fig. 11 is a schematic structural view of a stator core according to an embodiment of the present utility model;

fig. 12 is a side view of a stator core in an embodiment of the utility model;

FIG. 13 is a schematic view showing the structure of a rotor and a shaft according to an embodiment of the present utility model;

FIG. 14 is a front view of a chute according to an embodiment of the utility model;

FIG. 15 is a schematic view showing a coil structure according to an embodiment of the present utility model;

fig. 16 is an assembled view of a stator winding and a stator core in an embodiment of the utility model;

FIG. 17 is a schematic view of an assembly of coils and stator chute in accordance with an embodiment of the utility model;

FIG. 18 is a schematic view showing an internal structure of a junction box according to an embodiment of the present utility model;

fig. 19 is a schematic diagram showing an internal structure of a junction box according to an embodiment of the utility model.

Reference numerals illustrate:

1. a base; 101. a mounting cavity; 102. a bottom air inlet; 103. a side air inlet; 104. an air inlet net; 105. an air inlet window; 106. a junction box; 107. a window frame; 108. a window leaf; 109. a through hole I; 110. a through hole II; 111. a through hole III; 112. a connecting piece; 113. a gram head; 114. cold pressing the terminal; 115. a neutral point terminal; 2. a stator; 201. a stator core; 202. a stator winding; 203. a stator ventilation duct; 204. a chute; 205. a slot wedge; 206. a backing plate; 3. a rotor; 301. a rotor core; 302. a rotor ventilation duct; 4. a rotating shaft; 5. an exhaust part; 501. a blower; 502. a volute; 503. an air guide port; 504. an air inlet hole; 505. and an air outlet hole.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The asynchronous motor is characterized in that a chute is arranged on a stator, and an exhaust part is additionally arranged to achieve the high-power and low-noise asynchronous motor.

As shown in fig. 1 to 5, the asynchronous motor in the present embodiment includes:

the machine seat 1 is internally provided with a mounting cavity 101, the top of the machine seat 1 is provided with an air outlet, the bottom and the side parts of the machine seat 1 are respectively provided with a bottom air inlet 102 and a side air inlet 103, and the bottom air inlet 102, the side air inlet 103 and the air outlet are communicated with the mounting cavity 101;

a stator 2 fixedly arranged in the mounting cavity 101, wherein the stator 2 comprises a stator core 201 and a stator winding 202 embedded in the stator core 201, a stator ventilation channel 203 is arranged on the stator core 201, a plurality of inclined slots 204 sequentially arranged along the circumferential direction of the stator core 201 are formed on the inner circumferential side of the stator core 201, and the inclined slots 204 extend from the stator core 201 towards the center of the stator core 201;

a rotor 3 rotatably provided inside the stator core 201, the rotor 3 having a rotor air passage 302;

the rotating shaft 4 is fixedly connected with the rotor 3;

and the air exhaust part 5 is arranged at the air outlet, and the air exhaust part 5 is used for providing air flow power so as to enable the external air of the motor to be exhausted through the air inlet, the stator ventilating duct 203, the rotor ventilating duct 302 and the air outlet.

The machine base 1 is a cuboid box body with a cylindrical mounting cavity 101 at the middle part and is used as a supporting and mounting frame of a motor; the stator 2 comprises a stator core 201 and a stator winding 202, wherein the stator core 201 is formed by laminating punching sheets, and the stator winding 202 is a plurality of coils; the rotor 3 comprises a rotor core 301 and a rotor winding, wherein the rotor core 301 is formed by laminating punching sheets, and the rotor winding is a plurality of coils; the rotating shaft 4 is a shaft capable of driving the rotor 3 to rotate; the exhaust part 5 discharges heat generated when the motor is operated by sucking air outside the motor into the interior of the housing 1 and passing through the stator 2 and the rotor 3, and the air path is shown by an arrow in fig. 5.

After the stator winding 202 is wound on the chute 204 of the stator core 201, the stator 2 is placed in a cylindrical installation cavity 101 formed in the middle of the machine base 1, the size of the stator 2 is matched with that of the installation cavity 101, a fixing rib is arranged in the installation cavity 101, and the stator 2 can be propped against the fixing rib in the installation cavity 101 to realize fixation after being placed in the installation cavity 101; after the rotor winding is wound on the rotor core 301, the rotating shaft 4 is fixedly arranged in the rotor core 301, then the rotor 3 is fixed in the stator core 201, an air gap is reserved between the rotor 3 and the stator 2, so that the rotor 3 rotates after being electrified, and finally the stator 2 and the rotor 3 are sealed through the mounting plate, so that the rotating shaft 4 is exposed out of the machine base 1; the exhaust part 5 is fixedly arranged above the machine base 1.

After the stator winding 202 of the asynchronous motor is applied with symmetrical voltage, a rotating air gap magnetic field is generated, the rotor winding conductor cuts the induced potential generated by the magnetic field, a rotor 3 current is generated due to the fact that the rotor winding is in a short circuit state, electromagnetic torque is generated due to interaction of the rotor 3 current and the air gap magnetic field, the rotor 3 is driven to rotate, and accordingly other devices are driven.

In some embodiments of the present utility model, the exhaust part 5 includes a fan 501 and a volute 502, where an air outlet of the volute 502 is connected with an air guide opening 503, and the air guide opening 503 is upward. The fan 501 is installed in the middle of one side of the spiral case 502, an air inlet 504 is formed in the opening of the other side of the spiral case 502, the air inlet 504 is connected with an air outlet of the machine base 1, an air outlet 505 is formed in the spiral top end of the spiral case 502, and the air outlet 505 is fixedly connected with the bottom end of the air guide part.

The air guide opening 503 is upward arranged, so that heat can be discharged in a direction away from the motor, and the heat dissipation is further facilitated; and can avoid the hot air to directly blow the user, effectively improve the personal safety and the travelling comfort of operational environment.

The opening of the air guide opening 503 is internally provided with a silencing device, which is not shown in the figure, and the silencing device can adopt silencing cotton, a silencer and the like. The silencer is arranged at the position, so that the noise of the motor can be further effectively reduced, the comfort level of the working environment is improved, and the noise is placed to bring influence to personal safety.

In some embodiments of the present utility model, as shown in fig. 6 to 8, each of the fan 501 and the volute 502 includes at least two groups, and a connection design is adopted between the volutes 502. In this embodiment, two groups of fans 501 and two groups of volutes 502 are arranged, an integral shell is formed in the middle of the two groups of volutes 502 by adopting a conjoined design, the two groups of fans 501 are arranged in parallel, the dimension and the weight of the fans 501 can be effectively reduced while the air pumping quantity of the fans 501 is ensured by adopting the conjoined design, the dimension and the weight of an asynchronous motor are further reduced, and the noise generated by the motor due to mechanical vibration can be reduced.

In some embodiments of the present utility model, the bottom air inlet 102 of the stand 1 includes a plurality of air inlets, which are all disposed on the bottom surface of the stand 1 and symmetrically disposed along the installation direction of the stator 2, and the air inlet net 104 is installed on the bottom air inlet 102; the side air inlets 103 of the machine base 1 comprise a plurality of side air inlets 103 which are all arranged on the side face of the machine base 1 and symmetrically arranged along the installation direction of the stator 2, the side air inlets 103 are provided with air inlet windows 105, and the air inlet windows 105 comprise window frames 107 and a plurality of window blades 108 arranged on the window frames 107.

In the embodiment, the bottom air inlet 102 is four rectangular openings formed in the bottom surface of the base 1, two of the four rectangular openings are a group, and the four rectangular openings are respectively and symmetrically arranged at two ends of the bottom surface of the base 1 parallel to the installation direction of the stator 2, so that air inlet can pass through all heating parts such as the stator winding 202, the stator iron core 201, the rotor winding, the rotor iron core 301 and the like, and the heating value of the motor is reduced; the air inlet net 104 is arranged on the bottom air inlet 102, the air inlet net 104 adopts a grid plate, and the air inlet net 104 can effectively ensure air inlet and simultaneously prevent a large object from being sucked into the motor by the fan 501 to cause motor damage.

In the embodiment, the side air inlet 103 is four rectangular openings formed in the side surface of the base 1 near the bottom, two of the four rectangular openings are a group, and are respectively arranged at two ends of the side surface of the base 1 parallel to the mounting direction of the stator 2, so that the side air inlet 103 enables air inlet to pass through all heating parts such as the stator winding 202, the stator iron core 201, the rotor winding, the rotor iron core 301 and the like, and the heating value of the motor is reduced; the side air inlet 103 is provided with the air inlet window 105, the air inlet window 105 comprises a window frame 107 and a plurality of window blades 108, the window frame 107 is fixedly arranged on the side air inlet 103, two ends of the window blades 108 are fixed on the window frame 107, the window blades 108 form a certain inclination angle, and the arrangement of the air inlet window 105 enables the side air inlet 103 to ensure effective air inlet and simultaneously prevent dust from falling into the motor to influence the normal operation of the motor. The structure of the inlet window 105 is shown in fig. 9.

In some embodiments of the present utility model, as shown in fig. 10, through holes i 109, ii 110 and iii 111 are respectively formed on the inner wall of the installation cavity 101 of the base 1 at positions corresponding to the bottom air inlet 102, the side air inlet 103 and the air outlet, and the clicked external air enters from the bottom air inlet 102 and the side air inlet 103, then enters the stator air duct 203 and the rotor air duct 302 through the through holes i 109 and ii 110, and then is discharged from the air outlet through the iii 111.

The positions and the sizes of the through holes I109, II 110 and III 111 are set according to the sizes of the air inlets and the air outlets. Through hole I109, through hole II 110 and through hole III 111's setting makes click outside gaseous entering inside the motor after form smooth wind channel, takes away the heat, reduces the calorific capacity of motor.

In some embodiments of the present utility model, as shown in fig. 11 to 12, the stator air channels 203 are a plurality of channels that are disposed through the outer peripheral side of the stator core 201 to the inner peripheral side of the stator core 201, and the channels are disposed in parallel and uniformly. The channels are gaps formed by the smaller channel steel between two adjacent punching sheets in the process of laminating the punching sheets to form the stator core 201. The stator ventilation channels 203 penetrate through the stator core 201, heat generated by the stator winding 202 can be effectively taken away through air outside the motor, and the channels are parallel and uniformly arranged to facilitate uniform heat dissipation, so that a better heat dissipation effect is achieved.

In some embodiments of the present utility model, as shown in fig. 13, the rotor ventilation channel 302 includes a radial ventilation channel and an axial ventilation channel, where the radial ventilation channel is a plurality of radial channels that are disposed throughout the outer peripheral side of the rotor 3 to the inner peripheral side of the rotor 3, and the radial channels are disposed in parallel and uniformly; the axial ventilating duct is a plurality of axial channels penetrating through two ends of the rotor 3 and arranged in parallel with the rotating shaft 4, and the axial channels are uniformly arranged. The radial channels are gaps formed by the gap between two adjacent punching sheets by using smaller channel steel in the process of laminating the punching sheets to form the rotor core 301; the axial channels are a plurality of circular through holes uniformly formed in the stamping sheets at the outermost sides of the two ends of the rotor core 301, and external air entering the machine base 1 can enter the radial channels through the axial channels, so that the air inflow is large, and the heat dissipation effect is better.

In some embodiments of the present utility model, as shown in fig. 14, the chute 204 is formed by rotating the lamination of the lamination to form the stator core 201, and then forming the lamination from top to bottom. The chute 204 can effectively weaken harmonic electromotive force generated by tooth harmonic magnetic fields, weaken additional torque caused by the harmonic magnetic fields, and effectively reduce electromagnetic vibration and noise of the asynchronous motor.

In some embodiments of the utility model, the stator windings 202 comprise two groups, each group of stator windings 202 comprising two coils wound alternately in unequal numbers of turns within the chute 204. Winding two groups of coils with unequal turns can effectively weaken harmonic content, improve rated efficiency of a motor and reduce heating value of an asynchronous motor.

Through the conductor number of proper distribution every groove, the winding of turns inequality is coiled in turn, can effectively improve fundamental wave winding coefficient, obtain the magnetomotive force curve that is closer to the sine wave, can effectually weaken harmonic content, improve motor rated efficiency, improve motor starting performance, reduce stator winding 202 temperature rise, reduce the calorific capacity of motor, and adopt the winding of turns inequality to coil, can effectively practice thrift the consumptive material, reduce manufacturing cost. In this embodiment, two groups of coils with a size of one are provided, the large coil is a coil with 6 turns of wires, and the small coil is a coil with 5 turns of wires. The structure of the coil is shown in fig. 15, and the structure of the wound stator 2 is shown in fig. 16.

As shown in fig. 17, the specific winding manner of the coil on the chute 204 is: at present, a base plate 206 is fixedly arranged at the bottom of the groove, a coil is wound on a chute 204 at the outer side of the base plate 206, the base plate 206 is fixedly arranged in the groove, the base plate 206 is fixedly arranged at a position close to the notch after the coil is wound, a slot wedge 205 is fixedly arranged at the outer side of the base plate 206, the base plate 206 can tightly compress and wind the winding, the occupied space of the stator winding 202 is reduced, and the standardization of the stator winding 202 is improved; the slot wedge 205 can fix the coil embedded in the chute 204 as necessary, and can effectively prevent the coil from displacing in the chute and avoid the coil from being ejected from the chute.

One of the chute 204 is selected as a symbol slot, and is designated as 1 st, 2 nd, … … nd and 72 nd slots in turn in a counterclockwise direction, and 3 coils of 5 turns and 3 coils of 6 turns are sequentially inserted into the chute 204, each coil spanning 1-16 slots.

In some embodiments of the present utility model, the housing 1 is further provided with a junction box 106, and two sets of winding connection contacts are disposed in the junction box 106, and the winding connection contacts are respectively connected with the stator windings 202.

As shown in fig. 18 to 19, each set of winding connection contacts in the present embodiment includes four sets of cold-pressed terminals 114, wherein three sets are used as normal use contacts, one set is used as a standby contact, the connection points of the stator winding 202 are connected to the gram heads 113 in the junction box 106 through cables, and the cold-pressed terminals 114 facilitate connection of wires to the gram heads 113; a neutral terminal 115 is also provided in the junction box 106, and the neutral terminal 115 serves to stabilize the voltage and current.

The stator winding 202 is split into two sets of windings, one or two sets of stator windings 202 are communicated through winding connection joints, the power of the motor can be changed, and the motor can be used as a motor with rated power and half of rated power respectively, so that one machine is multipurpose.

The two groups of winding connection joints are connected through the connecting piece 112, the connecting piece 112 adopts copper bars, and the copper bars can play a role in auxiliary heat dissipation when being convenient for operating and controlling the on-off of the two groups of stator windings 202, so that potential safety hazards caused by heating of the winding connection joints in the junction box 106 are avoided.

When the asynchronous motor works, the stator 2 is electrified through the winding connection joints in the junction box 106, then the coil in the rotor 3 generates induction current, in the running process of the asynchronous motor, due to the arrangement of the chute 204, electromagnetic vibration and noise are effectively reduced, the arrangement of the stator windings 202 with unequal turns effectively reduces the temperature rise of the stator windings 202, the heating value of the asynchronous motor is reduced, the generated heat is extracted and dissipated through the fan 501 of the heat dissipating device, the noise and the heating value in the running process of the asynchronous motor are greatly reduced, and the comfort of the use environment is improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An asynchronous motor, comprising:

the machine comprises a machine base, wherein an installation cavity is formed in the machine base, an air outlet is formed in the top of the machine base, a bottom air inlet and a side air inlet are respectively formed in the bottom and the side of the machine base, and the bottom air inlet, the side air inlet and the air outlet are communicated with the installation cavity;

the stator is fixedly arranged in the mounting cavity and comprises a stator iron core and a stator winding embedded in the stator iron core;

a rotor rotatably provided inside the stator core;

the rotating shaft is fixedly connected with the rotor;

and the air exhaust part is arranged at the air outlet and is used for providing air flow power so that the external air of the motor is exhausted through the air inlet and the air outlet.

2. An asynchronous motor according to claim 1, wherein the bottom air inlets are arranged on the bottom surface of the machine base and symmetrically along the stator mounting direction; the side air inlets comprise a plurality of air inlets which are all arranged on the side face of the machine base and are symmetrically arranged along the installation direction of the stator.

3. An asynchronous motor according to claim 2, wherein the bottom air inlet is provided with an air inlet net, and the side air inlet is provided with an air inlet window.

4. An asynchronous motor according to claim 1, wherein the exhaust section comprises a blower and a volute,

the exhaust part comprises a fan and a volute, an air outlet of the volute is connected with an air guide port, and the air guide port is arranged upwards.

5. An asynchronous motor according to claim 4, wherein said fan and said volute each comprise at least two sets, and wherein said volutes are integrally formed.

6. An asynchronous motor according to claim 4, wherein the air guide opening is internally provided with a silencing device.

7. An asynchronous motor according to claim 1, wherein the positions corresponding to the bottom air inlet, the side air inlet and the air outlet on the inner wall of the mounting cavity of the machine base are respectively provided with a through hole i, a through hole ii and a through hole iii, and the external air of the motor is discharged from the air outlet through the through hole i, the through hole ii and the through hole iii after entering from the bottom air inlet and the side air inlet.

8. An asynchronous machine according to any one of claims 1 to 7 wherein the stator windings comprise two groups, each group comprising two coils wound alternately around the stator core with unequal numbers of turns.

9. An asynchronous motor according to any one of claims 1 to 7, wherein a junction box is further provided on the machine base, and two sets of winding connection contacts are provided in the junction box, and the winding connection contacts are respectively connected with the stator windings.

10. An asynchronous machine according to claim 9, characterized in that the two sets of winding connection contacts are connected by means of a connecting piece.