Cooling structure of permanent magnet motor

Abstract

The utility model relates to a cooling structure of a permanent magnet motor, which comprises a base, an end cover, a rotating shaft and an air deflector, support ribs are arranged on the inner circumference of the base, a stator is arranged in the support ribs, and the side walls of the support ribs, the inner side wall of the base and the outer side wall of the stator are matched to form an axial ventilating duct; air outlets are respectively formed in the middles of two side walls of the base; the end covers are connected and installed at the two ends of the machine base through first connecting pieces respectively, and a plurality of air inlets are formed in the end covers respectively. When the fan blade end plates at the two ends of the rotor rotate, positive pressure is formed in the machine base, air outside the motor continuously enters the machine base and is exhausted from the air outlet, a circulating air path is formed, internal and external cooling air circulates continuously, the ventilation pipeline is arranged on the rotor, cooling air can enter the rotor through the ventilation pipeline, and the cooling effect is improved. The cooling effect of the rotor is enhanced, and the air deflector in the machine base enables cooling air to enter the ventilation pipeline better.

Description

TECHNICAL FIELD

[0001] The utility model belongs to permanent magnet motor technical field especially relates to a cooling structure of permanent magnet motor. BACKGROUND

[0002] Permanent magnet motor is widely used in various fields, when using, the cooling effect of motor is related to the use effect of motor, permanent magnet motor air cooling is a kind of commonly used cooling means, part motor adopts external air cooling structure, in order to reduce motor temperature rise and increase motor power density, some manufacturers adopt large air volume and large power fan, but this scheme will cause motor cost increase, and the power of fan motor is increased, so that the energy efficiency of equipment system is reduced, part motor also adopts internal air cooling, but there is no good axial ventilation structure inside, because the thermal conductivity of air is poor, often because motor temperature is too high, so in the process of designing motor scheme, only more material-consuming scheme can be used. SUMMARY

[0003] In view of the prior art, the utility model provides a cooling structure of permanent magnet motor.

[0004] The utility model discloses the technical scheme that the above technical problem is adopted to solve:

[0005] A cooling structure of permanent magnet motor, comprising:

[0006] The machine seat is provided with a support rib on the inner circumference, and the support rib is provided with a stator inside; the side wall of the support rib, the inner side wall of the machine seat and the outer side wall of the stator cooperate to form an axial ventilation channel; the two side walls of the machine seat are respectively provided with an air outlet;

[0007] The end cover is connected and installed on the two ends of the machine seat by the first connecting piece respectively, and a plurality of air inlets are formed on the end cover; the middle part of the end cover is respectively provided with a bearing;

[0008] The rotating shaft is connected with the bearing by interference fit at both ends, and the middle part of the rotating shaft is provided with a rotor capable of cooperating with the stator; the rotor is provided with a gas pipeline horizontally inside; the rotor and the stator are provided with an air gap, and the both ends of the rotor are respectively provided with a blade end plate;

[0009] The air deflector is installed on the two end covers by the second connecting piece respectively, and the air deflector is respectively provided with an inwardly retracting inclined plate, and the end of the inclined plate is provided with a drainage plate capable of cooperating with the blade end plate.

[0010] Preferably, the upper middle part of the machine seat is provided with an ear.

[0011] Preferably, the bearing is fixed by the retainer.

[0012] Preferably, the upper end of the base is provided with a terminal box.

[0013] Preferably, the inner surface of the support rib is provided with an arc surface capable of cooperating with the stator.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] When the fan blade end plate of the rotor rotates, the inside of the base forms a positive pressure, the air source outside the motor continuously enters the inside of the base and is discharged from the air outlet, forming a circulating air path, the inside and outside cooling air circulates continuously, the ventilation pipeline formed on the rotor enables the cooling air to enter the inside of the rotor through the ventilation pipeline, the cooling effect of the rotor is enhanced, the guide vane inside the base enables the cooling air to better enter the ventilation pipeline, and the axial ventilation channel between the stator and the base improves the overall cooling effect of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a whole structure schematic view of the utility model.

[0017] Fig. 2 It is a base sectional view schematic view of the utility model.

[0018] In the drawing: 1, base; 2, support rib; 3, stator; 4, axial ventilation channel; 5, air outlet; 6, end cover; 7, first connecting piece; 8, air inlet; 9, bearing; 10, rotating shaft; 11, rotor; 12, ventilation pipeline; 13, air gap; 14, fan blade end plate; 15, guide vane; 16, inclined plate; 17, drainage plate; 18, lifting lug; 19, baffle; 20, terminal box; 21, arc surface. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the utility model scheme, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings.

[0020] The embodiment provides a cooling structure of a permanent magnet motor, which comprises a base 1, an end cover 6, a rotating shaft 10 and a guide vane 15, the base 1 provides mounting support for each component, the end cover 6 can provide mounting support for the rotating shaft 10 while sealing the base, and the guide vane 15 is used for improving the cooling effect of the motor.

[0021] As shown in the drawing, Figs. 1-2 The base 1 is provided with a support rib 2 in the circumferential direction, the support rib 2 is provided with a stator 3 in the inside, the side wall of the support rib 2 and the inner side wall of the base 1 cooperate with the outer side wall of the stator 3 to form an axial ventilation channel 4, the axial ventilation channel 4 enables the outer side of the stator 3 and the inner side of the base 1 to better exchange heat with air, and the cooling effect is improved.

[0022] The middle of the two side walls of the base 1 are respectively provided with air outlets 5, and the hot air in the base 1 can be discharged from the base 1 through the air outlets 5;

[0023] The end covers 6 are connected to both ends of the base 1 by using first connecting members 7. A plurality of air inlets 8 are respectively opened on the end covers 6. Cold air outside the base 1 can enter the base 1 through the air inlets 8.

[0024] The middle part of the end cover 6 is provided with a bearing 9;

[0025] The two ends of the rotating shaft 10 are respectively connected to the bearings 9 by interference fit, and the bearings 9 ensure that the rotating shaft 10 rotates smoothly;

[0026] A rotor 11 is provided in the middle of the rotating shaft 10 and is adapted to cooperate with the stator 3. A ventilation duct 12 is provided transversely inside the rotor 11 to facilitate air flow into the rotor 11 and improve the cooling effect of the motor.

[0027] An air gap 13 is provided between the rotor 11 and the stator 3. Blade end plates 14 are provided at both ends of the rotor 11. When the rotating shaft 10 rotates, the blade end plates 14 are driven to rotate. The blade end plates 14 allow the cold air outside the end cover 6 to be drawn into the base 1 to cool the internal space of the base 1.

[0028] The air guide plates 15 are respectively installed on the two end covers 6 by means of second connecting parts. The air guide plates 15 are respectively provided with inwardly contracted inclined plates 16. The ends of the inclined plates 16 are provided with guide plates 17 that can cooperate with the fan end plates 14. The guide plates 17 allow air to better enter the ventilation duct 12 in the rotor 11.

[0029] Furthermore, a lifting lug 18 is provided on the middle portion of the upper portion of the base 1 , and the lifting lug 18 facilitates the assembly and movement of the motor.

[0030] Furthermore, the bearings 9 are fixed by retaining rings 19 , which ensure that the bearings 9 do not move axially.

[0031] Furthermore, a junction box 20 is provided at one end of the upper side of the base 1 , and the junction box 20 facilitates the assembly of the motor circuit.

[0032] Furthermore, the inner surface of the support rib 2 is provided with an arc surface 21 that can cooperate with the stator 3. The arc surface 21 facilitates the installation of the stator 3 and is stable and firm.

[0033] Working principle: When the utility model is in use, the rotating shaft 10 rotates, driving the fan blade end plate 14 to rotate. The maple leaf end plate 14 allows the cold air outside the end cover 6 to enter the inside of the machine base 1 to form cooling wind. The cooling wind enters the ventilation duct 12 inside the rotor 11 along the wind guide plate 16, and part of the cooling wind enters the axial ventilation hole; after the heat inside the motor is heat exchanged with the cooling wind, it is discharged through the air outlet 5.

[0034] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A cooling structure of a permanent magnet motor, characterized by, Include: The base (1), the inner circumference of the base (1) is provided with support rib (2), support rib (2) is provided with stator (3), the side wall of support rib (2), the inner side wall of base (1) and the outer side wall of stator (3) cooperate to form axial ventilation channel (4);The two side walls of the base (1) are respectively provided with air outlet (5); End cover (6), the end cover (6) is respectively connected and installed in the two ends of base (1) by first connecting piece (7), the end cover (6) is respectively provided with a plurality of air inlet (8);The middle part of end cover (6) is respectively provided with bearing (9); Shaft (10), the two ends of the shaft (10) are respectively connected with bearing (9) by interference fit, the middle part of shaft (10) is provided with rotor (11) capable of cooperating with stator (3), the inside of rotor (11) is horizontally provided with air pipe (12);The air gap (13) is arranged between the rotor (11) and the stator (3), and the two ends of the rotor (11) are respectively provided with fan blade end plate (14); Air deflector (15), the air deflector (15) is respectively installed on the two end covers (6) by second connecting piece, the air deflector (15) is respectively provided with inwardly retracting inclined plate (16), the end of inclined plate (16) is provided with drainage plate (17) capable of cooperating with fan blade end plate (14).

2. A cooling structure of a permanent magnet motor according to claim 1, characterized by, The upper middle part of the base (1) is provided with lifting lug (18).

3. The cooling structure of a permanent magnet motor according to claim 1, characterized by, The bearing (9) is respectively fixed by retainer (19).

4. The cooling structure of a permanent magnet motor according to claim 1, characterized by, One end of the upper surface of the base (1) is provided with terminal box (20).

5. The cooling structure of a permanent magnet motor according to claim 1, wherein The inner surface of the support rib (2) is provided with arc surface (21) capable of cooperating with stator (3).

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