CN2528151Y

CN2528151Y - Internal cooling electric motor

Info

Publication number: CN2528151Y
Application number: CN 02221251
Authority: CN
Inventors: 李绵军
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-11
Filing date: 2002-01-11
Publication date: 2002-12-25
Anticipated expiration: 2012-01-11

Abstract

The utility model relates to an internal cooling motor which belongs to a motor cooling or a motor ventilating system. The utility model mainly solves the cooling problem of the inner part of the motor, which can make the inner part of the motor disperse heat in time and directly. The internal cooling motor comprises a motor shaft, a rotor, a stator and a stator coil, wherein the motor shaft is concentrically matched with the rotor; the stator is concentrically matched with the rotor; the external rim of the stator clings to the inner wall of a motor casing tightly; the front end of the motor casing is connected with a front end cap, and the rear end is connected with a rear end cover. The motor shaft is supported by the front and the rear end caps by bearings. The rear end cover is covered by a fan housing. A fan is arranged at the rear end of the motor shaft which is positioned in the fan housing. The external rim of the stator is cut, and a heat dissipation path is formed between the stator and the motor casing. The rear end cap is provided with a cold air inlet, and the position of the motor casing, which is adjacent to the front end cap is provided with a hot air outlet.

Description

The inner-cooled motor

(1) technical field: the inner-cooled motor, belong to machine field, relate in particular to the cooling or the ventilating system of motor.(HO ₂K)

(2) background technology: at present, to the cooling of motor, usual manner is that the motor exterior case is cooled off, thereby make motor interior cooling, the heat that rotor acting just produces is passed to the shell of motor, make air quicken to flow by fan, motor is cooled off.Because the rotor and the stator close fit of motor, again and airtight between the motor casing, there is not heat dissipation channel therebetween, so this conventional type of cooling can not be in time the heat of motor interior is directly emitted, built-in temperature can not in time descend, and in practice, or fluctuated because of voltage, the induction-motor load weight is indefinite, motor overload operation etc., more can produce high hot high temperature, along with built-in temperature constantly rises, motor power (output) reduces, the complete machine performance is forced to descend, efficient reduces, and not only wastes energy, and the useful life even the motor that more can shorten motor are burnt out.Motor (comprising generator) is burnt out in a word, all is because due to the high hot high temperature more than 95%.

(3) summary of the invention: the utility model is exactly problem and the shortcoming that exists at above-mentioned motor, and a kind of motor that can in time lower the temperature internally is provided.Its technical scheme is as follows:

It comprises motor shaft, rotor, stator and stator coil, motor shaft and rotor concentric fit, stator and rotor concentric fit, the outward flange of stator is close to the inwall of motor casing, the front end of motor casing connects front end housing, and the rear end connects rear end cap, and motor shaft is located by forward and backward end cap supporting by bearing, cover one fan housing on the rear end cap, a fan is installed in the rear end of motor shaft in fan housing.Its key technology-be with the outward flange excision of stator, form heat dissipation channel between stator and the motor casing inwall, have the cold wind import at the rear end cap place, on motor casing, have hot-blast outlet near the front end housing place.

The beneficial effects of the utility model: (1) is owing to be provided with heat dissipation channel and have cold wind import and hot-blast outlet in motor interior, directly constantly inject in the motor cold air in a steady stream, the heat that stator coil, stator and rotor the produced machine that gives off is continuously and automatically dispelled the heat outward, built-in temperature is lowered in time, motor is in a splendid operational environment all the time, its complete machine stable work in work, overall efficiency improves at least 30%, prolonged useful life, writing uses, maintenance cost for producer or user save, and increases economic efficiency.(2) owing to be provided with heat dissipation channel, net and saved material greatly reduces manufacturing cost.(3) hot blast of hot-blast outlet can be used and energy savings in the winter time, create social benefit.

(4) description of drawings

Fig. 1 is the utility model embodiment one structural representation;

Fig. 2 is the utility model embodiment two structural representations;

Fig. 3 is the utility model embodiment three structural representations;

Fig. 4 is one of the utility model embodiment A-A view;

Fig. 5 is two of the utility model embodiment A-A view;

(5) embodiment

Embodiment one: referring to Fig. 1, Fig. 4, the utility model comprises motor shaft 1, rotor 10, stator 12 and stator coil 13, motor shaft 1 and rotor 10 concentric fit, stator 12 and rotor 10 concentric fit, the outward flange of stator 12 is close to the inwall of motor casing 11, and the front end of motor casing connects front end housing 2, the rear end connects rear end cap 8, motor shaft 1 by forward and backward end cap supporting location, covers a fan housing 6 by bearing 7 on the rear end cap 8, a fan 5 is installed in the rear end of motor shaft in fan housing 6.Its key technology is with the equidistant excision of the outward flange of stator 12, forms 2-4 heat dissipation paths 3 between stator and the motor casing inwall.Have up and down two breach (or about adding two breach totally 4 breach) at the circular arc place of rear end cap 8, form cold wind import 4.Drive fan 5 rotations during motor work and produce wind-force, by fan housing 6 guiding air-flow being compressed into 4 pairs of stator coils 13 of cold wind import cools off, again by the air gap between heat radiation pore 14 and heat dissipation channel 3 and rotor and stator, rotor 10 and stator 12 are cooled off, and the cold wind that enters is continually just discharged hot blast hot-blast outlet 9, has reached inner direct cooling purpose.Meanwhile, the waste heat in the machine is also passed to motor casing 11, and the air-flow that is produced by fan 5 rotations cools off motor casing again, carries out dual-cooled, so just provides the good operation condition to motor, has guaranteed that also motor works in the best condition.Import has pollution or foreign material to enter as cold wind, and available plastic tube adds filter screen set and isolate pollutant sources on fan housing 6.Offer a plurality of equally distributed heat radiation pores 14 (wherein good with 4 heat transmission gas Kongzuis) on stator 12, better effects if is so that stator interior can fully be dispelled the heat.

Embodiment two: referring to Fig. 2, cold wind import 4 of the present utility model is positioned on the rear end cap 8 near the center, it is to have a plurality of eyelets and form on this position, one internal fan 15 is installed on the motor shaft in rear end cap 8, by internal fan 15 by eyelet suck cold air motor interior is cooled off after again row pressure go out hot gas.Other structure of present embodiment is identical with embodiment one structure.

Embodiment three: referring to Fig. 3, cold wind import 4 of the present utility model is close rear end cap 10-30 millimeter place on hot-blast outlet 9 opposite motor casings 11, cold wind import 4 be used to give a dinner for a visitor from afar machine discharge pipe or other wind regime discharge pipe, hot-blast outlet 9 connects caliduct, external source cold wind is pressed into by cold wind import 4, squeeze the hot blast in the motor, insert caliduct, be used for heating or drying article by hot-blast outlet 9.This structure is mainly used on the high capacity motor.Other structure of present embodiment is identical with embodiment one structure.

Embodiment four: referring to Fig. 5, the utility model excises the outward flange of stator 12 along week, forms an annular heat dissipation channel 3 between stator and the motor casing inwall.Other structure can be identical with arbitrary example structure among above-mentioned three embodiment.

Claims

1. inner-cooled motor, comprise motor shaft (1), (10) have been changeed, stator (12) and stator coil (13), motor shaft (1) and rotor (10) concentric fit, stator (12) and rotor (10) concentric fit, the outward flange of stator (12) is close to the inwall of motor casing (11), the front end of motor casing connects front end housing (2), the rear end connects rear end cap (8), motor shaft (1) passes through bearing (7) by preceding, rear end cap supporting location, rear end cap (8) is gone up cover one fan housing (6), a fan (5) is installed in the rear end of motor shaft (1) in fan housing (6), it is characterized in that outward flange excision with stator (12), form heat dissipation channel (3) between stator and the motor casing inwall, locate to have cold wind import (4), go up near front end housing (2) at motor casing (11) and locate to have hot-blast outlet (9) at rear end cap (8).

2. according to the described inner-cooled motor of claim 1, it is characterized in that on stator (12), having some equally distributed heat radiation pores (14).

3. according to claim 1 or 2 described inner-cooled motor, it is characterized in that the equidistant excision of outward flange, form at least 2 heat dissipation paths (3) between stator and the motor casing inwall stator (12).

4. according to claim 1 or 2 described inner-cooled motor, it is characterized in that the outward flange of stator (12) was excised along week, form an annular heat dissipation channel (3) between stator and the motor casing inwall.

5. according to claim 1 or 2 described inner-cooled motor, it is characterized in that having breach at the circular arc place of rear end cap (8) forms cold wind import (4).

6. according to claim 1 or 2 described inner-cooled motor, it is characterized in that going up close center at rear end cap (8) has some eyelets formation cold wind imports (4), installs an internal fan (15) on the motor shaft in rear end cap (8).

7. according to claim 1 or 2 described inner-cooled motor, it is characterized in that going up close rear end cap (8) at motor casing (11) locates to have cold wind import (4).