CN202798335U

CN202798335U - Wind path structure of water-jacket-cooled motor

Info

Publication number: CN202798335U
Application number: CN 201220440465
Authority: CN
Inventors: 许明宇
Original assignee: SEC Electric Machinery Co Ltd
Current assignee: SEC Electric Machinery Co Ltd
Priority date: 2012-08-31
Filing date: 2012-08-31
Publication date: 2013-03-13
Anticipated expiration: 2022-08-31

Abstract

The utility model discloses a wind path structure of a water-jacket-cooled motor. The wind path structure is divided into an inner layer and an outer layer through a separation board, wherein the outer layer comprises an axially arranged backflow air duct and a cooling water chamber, and the inner layer comprises an air gap between a stator and a rotor and an axial ventilating duct arranged in the rotor. When a centrifugal fan rotates, the air sequentially passes through fan blades, the backflow air duct and the axial ventilating duct or the air gap and then returns to the fan blades to form a circulating cooling wind path. An air hole is arranged on the centrifugal fan, and a cavity is arranged between the centrifugal fan and a bearing arranged on the back side of the centrifugal fan. Wind separation plates are blocked on partial air inlets of the backflow air duct and are provided with holes connected with the cavity to form an auxiliary radiating air duct. When the centrifugal fan rotates, the air sequentially passes through the fan blades, the backflow air duct, the auxiliary radiating air duct and the cavity and then returns to the fan blades to form an auxiliary radiating wind path. The wind path structure can actively dissipate heat for the bearing arranged on the back side of the centrifugal fan, reduces temperature of the bearing, and ensures reliable operation of the motor.

Description

A kind of wind path structure of jacket-cooled motor

Technical field

The utility model relates to the wind path field of motor, the especially wind path structure of jacket-cooled motor.

Background technology

The cooling of water jacket support motor is general, and what adopt is wind path for axial circulation, such as Fig. 1, when rotor, the centrifugal fan 10 that is connected on the motor shaft 19 rotates, wind enters return airway 2 from the end of flabellum 6, through behind stator winding 20 1 ends vertically between air duct 18 or rotor air gap 16 get back to the bottom of flabellum 6, form the circulating cooling wind path.

Such motor is in operation process, the bearing 9 heating meetings that are positioned at centrifugal fan 10 back sides are more serious, its reason is: bearing 9 regions are not included on the described circulating cooling wind path, and hot blast can take heat to the centrifugal fan bottom when entering centrifugal fan, heat passes in the cavity between centrifugal fan 10 and the bearing 9, causes bearing temperature to rise.Can cause like this lubricating oil viscosity to descend, the wearing and tearing aggravation of roller, the useful life of shortening bearing; After the simultaneously roller heavy wear, the vibration of motor and the enhancing of noise affect useful life of motor.

The utility model content

The applicant can not be to the bearing heat radiation at the centrifugal fan back side for the wind path structure of existing jacket-cooled motor, also cause easily this bearing heating, affect the motor problem in useful life, a kind of wind path structure of jacket-cooled motor is provided, thereby initiatively described bearing is dispelled the heat, reduce described bearing temperature, guarantee the reliability service of motor.

The technical solution of the utility model is as follows:

A kind of wind path structure of jacket-cooled motor, be divided into inside and outside two-layer by demarcation strip, comprise the air gap between axial ventilation road, rotor and the stator in the rotor core in the described internal layer, described skin comprises cooling water chamber and peripheral return airway thereof, described return airway is arranged vertically, adjacent two return airwaies are separated fully by fin, are connected with centrifugal fan on the rotor; When rotor, wind enters described return airway from the end of flabellum, air through behind stator winding one end vertically between air duct or rotor air gap get back to the bottom of described flabellum, form the circulating cooling wind path; The outside of centrifugal fan is the end cap that bearing is installed, and the inboard ring baffle that connects of described end cap, the edge of described baffle plate be with flange, and the lateral surface of described flange is near the back side of flabellum, and leaves the gap; The air inlet of the described return airway of a part blocks up wind isolation board, forms the auxiliary heat dissipation air channel; Have the hole of connection on described wind isolation board and the described baffle plate; Have pore on the described centrifugal fan; Air from the other end out, and enters described auxiliary heat dissipation air channel after the end of described flabellum enters the return airway, enter the cavity between fan and the bearing along the hole again, gets back to the flabellum bottom from described pore again, forms the auxiliary heat dissipation wind path.

Its further technical scheme is:

Described wind isolation board is connected on the lateral surface of described demarcation strip, is connected with pad between described wind isolation board and the described baffle plate; Have the hole of connection on described wind isolation board, pad and the baffle plate;

The ratio of the number in described return airway and described auxiliary heat dissipation air channel is between 4 ~ 15.

The beneficial effects of the utility model are as follows:

The utility model is adapted as the auxiliary heat dissipation air channel with a part of return airway, cold wind can be guided to the back side of centrifugal fan, bearing in this zone is cooled off, can reduce thus operating temperature, the prolongation bearing life of the bearing at the centrifugal fan back side, can also guarantee the stable operation of motor, prolong motor useful life.

Description of drawings

Fig. 1 is the wind path structure structural representation of existing jacket-cooled motor.

Fig. 2 is wind path structure schematic diagram of the present utility model.

Fig. 3 is the A-A cutaway view of Fig. 2.

Fig. 4 is the B-B cutaway view of Fig. 2.

Fig. 5 is the C-C cutaway view of Fig. 2.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described.

As shown in Figure 3, the utility model is divided into inside and outside two-layer by demarcation strip 4, comprises the air gap 16 of 15 of axial ventilation road 18 in the rotor core 17 and rotor 17 and stators in the described internal layer; Described skin is divided into 16 return airwaies 2 equably by fin 21, is respectively equipped with cooling water chamber 3 in the return airway 2.As shown in Figure 4, the two ends of return airway 2 have air inlet and air outlet, because both shapes are identical, described air outlet are not drawn in this accompanying drawing.

As shown in Figure 2, return airway 2 of the present utility model and cooling water chamber 3 are arranged vertically; The air inlet of return airway 2 faces the end of flabellum 6, and its air outlet is positioned at the other end.Centrifugal fan 10 is bolted on electric machine main shaft, and flabellum 6 is bolted.The back side of centrifugal fan 10 is End cover for motor 7, and bearing 9 and annex thereof are installed in the end cap 7.Also be welded with the baffle plate 5 of a ring shape on the medial surface of end cap 7, the edge of baffle plate 5 is with flange, and the lateral surface of described flange is pressed close to the back side of flabellum 6 thereby formed a cavity between centrifugal fan 10 and bearing 9.The surface of centrifugal fan 10 also offers pore 8, and pore 8 is over against the bottom of flabellum 6.Flabellum 6 is sabre shape, and when fan 10 rotation, very strong negative pressure can be formed on the bottom of the flabellum 6 of this shape, and the air in the described cavity can be by described negative pressure by pore 8 sucking-offs.

Air inlet two described return airwaies 2 is installed wind isolation board 12, and a side of wind isolation board 12 is bolted on demarcation strip 4; Can certainly pass through the methods such as welding, riveted joint and connect, wind isolation board 12 can also be connected on the miscellaneous part simultaneously; Its opposite side is bridged on the lateral surface of baffle plate 5, changes return airway 2 into auxiliary heat dissipation air channel 14.Be provided with pad 11 between wind isolation board 12 and the baffle plate 5, to adjust the setting angle of wind isolation board 12.As shown in Figure 5, have the hole 22 that is communicated with successively on wind isolation board 12, pad 11 and the baffle plate 5.

When motor shaft 19 begins to rotate, the inside of motor can form two wind paths:

The first via: under saber shaped flabellum 6 effects, the air of flabellum 6 bottoms is admitted to return airway 2,; Be provided with cooling water chamber 3 in the return airway 2, hot-air is cooled at this; After cold air leaves return airway 2, through stator coil 20, come the bottom of flabellum 6 along air gap 16 or axial ventilation road 18, take away simultaneously the heat in stator 15, rotor 18 and the stator coil 20, form main heat radiation circulation wind path;

The second the tunnel: because the negative pressure of sabre shape flabellum bottom is very strong, the air in centrifugal fan 10 backside cavity is inhaled in the flabellum 6 by pore 8, then is admitted to return airway 2 coolings, and blows out from opposite side; Because the air pressure in the cavity descends, the air in the auxiliary heat dissipation air channel 14 enters described cavity by the hole 22 on wind isolation board 12, pad 11 and the baffle plate 5; This moment, auxiliary heat dissipation air channel 14 interior air pressure descended, and auxiliary heat dissipation air channel 14 can suck in the cold air that blows out in the return airway 2, forms auxiliary heat dissipation circulation wind path.

Auxiliary heat dissipation air channel 14 is obtained by return airway 2 repackings, if the quantity in auxiliary heat dissipation air channel 14 too much will affect the efficient of main heat radiation circulation, but very few words do not have again good thermolysis.In general, when motor speed was higher, bearing heating was more serious, thereby the quantity in auxiliary heat dissipation air channel 14 will increase.In general, the heat radiation requirement of bearing arrangement 9 just can be satisfied in 1-2 auxiliary heat dissipation air channel 14, only in the situation that still can not satisfy bearing heat radiation requirement, just can consider to increase auxiliary heat dissipation air channel 14, but return airway 2 is unsuitable too small with the ratio of the number in auxiliary heat dissipation air channel 14, in order to avoid the main heat radiation circulation of impact.According to the result of use of reality, when offering an auxiliary heat dissipation air channel 14 in former 16 return airwaies 2, the temperature of bearing 9 descends to some extent, and this moment, return airway 2 was 15 with the ratio of the number in auxiliary heat dissipation air channel 14; When offering 2 auxiliary heat dissipation air channels 14, the temperature of bearing 9 has obvious decline, and this moment, both quantity ratios were 7; Ratio when offering 3 auxiliary heat dissipation air channels 14 is 4.33, circulation wind path shared return airway 2 further reduce because the master is dispelled the heat this moment, radiating effect to main component of electrical machine has caused certain influence, thereby the applicant is defined as the ratio of the number in return airway 2 and auxiliary heat dissipation air channel 14 between 4 ~ 15, the technical staff can be according to the real work situation, the ratio of both numbers of choose reasonable.

Because the negligible amounts in auxiliary heat dissipation air channel should circumferentially be evenly arranged auxiliary heat dissipation air channel 14.So, the air inlet of the return airway 2 that hot-air can close on from auxiliary heat dissipation air channel 14 flows away, and avoids hot-air in small space 13 inner accumulated of wind isolation board 12 with flabellum 6 ends.

The shape in return airway 2, auxiliary heat dissipation air channel 14 and axial ventilation road 18 can design according to actual needs, and present embodiment only supplies technical staff's reference, in order to understand more intuitively the utility model.More than describing is to explanation of the present utility model, is not to restriction of the present utility model, and the utility model limited range is referring to claim.In the situation of the utility model basic structure, the utility model can be done any type of modification.

Claims

1. the wind path structure of a jacket-cooled motor, be divided into inside and outside two-layer by demarcation strip (4), comprise the air gap (16) between axial ventilation road (18), rotor and the stator in the rotor core in the described internal layer, described skin comprises cooling water chamber (3) and peripheral return airway (2) thereof, return airway (2) is arranged vertically, adjacent two return airwaies (2) are separated fully by fin (21), are connected with centrifugal fan (10) on the rotor; When rotor, air enters return airway (2) from the end of flabellum (6), through behind stator winding (20) one ends vertically between air duct (18) or rotor air gap (16) get back to the bottom of flabellum (6), form the circulating cooling wind path; The outside of centrifugal fan (10) is for being equipped with the end cap (7) of bearing (9), and the inboard of end cap (7) connects ring baffle (5), and baffle plate (5) edge is with flange, and the lateral surface of described flange is near the back side of flabellum (6), and leaves the gap; It is characterized in that: the air inlet of partial reflux air channel (2) is stifled to have wind isolation board (12) to form auxiliary heat dissipation air channel (14), have the hole (22) of connection on wind isolation board (12) and the baffle plate (5), have on the centrifugal fan (10) over against the pore (8) of flabellum (6) bottom; Air is after the end of flabellum (6) enters return airway (2), (2) other end out and enter auxiliary heat dissipation air channel (14) from the return airway, enter cavity between fan (10) and the bearing (9) along hole (22) again, from pore (8), get back to again flabellum (6) bottom, form the auxiliary heat dissipation wind path.

2. the wind path structure of jacket-cooled motor as claimed in claim 1, it is characterized in that: wind isolation board (12) is connected on the lateral surface of demarcation strip (4), is connected with pad (11) between wind isolation board (12) and the baffle plate (5); Have the hole (22) of connection on wind isolation board (12), pad (11) and the baffle plate (5).

3. the wind path structure of jacket-cooled motor as claimed in claim 1, it is characterized in that: the ratio of the number of return airway (2) and auxiliary heat dissipation air channel (14) is between 4 ~ 15.