CN201266865Y

CN201266865Y - Draughting motor with circulating air passage end cover device

Info

Publication number: CN201266865Y
Application number: CNU2008201062202U
Authority: CN
Inventors: 程卫东; 梁培志; 李刚; 霍向飞; 张学锋
Original assignee: Yongji Xinshisu Electric Equipment Co Ltd
Current assignee: CRRC Yongji Electric Co Ltd
Priority date: 2008-10-16
Filing date: 2008-10-16
Publication date: 2009-07-01
Anticipated expiration: 2018-10-16

Abstract

The utility model relates to a motor, in particular to a traction motor with a circulating air passage end cover device, which solves the problem of heat radiation of a bearing in the existing motor and comprises a motor stator, an end cover body, an inner sealing ring and an outer sealing ring. The end cover body is connected with the motor stator and an inner air cover; the inner sealing ring is sleeved on a rotating shaft of the motor; the inner air cover and the inner sealing ring are staggered and matched by a labyrinth groove so as to realize sealing; the outer sealing is sleeved on the rotating shaft of the motor; the inner sealing ring, the outer sealing ring and a bearing cover form a bearing chamber for holding the bearing; and the exterior of a hub-type air flow chamber which is formed by the inner air cover, the end cover body and the bearing cover is provided with an air inlet net cover. The utility model can be used for various alternating current/direct current motors, especially the totally enclosed traction motor, and has strong applicability.

Description

The traction electric machine of band circulated air terminal lid arrangement

Technical field

The utility model relates to a kind of motor, is specially a kind of traction electric machine with circulated air terminal lid arrangement.

Background technology

In the mobile devices such as railway locomotive, motor-car, electric automobile, traction electric machine works under the adverse circumstances such as high temperature, sleet, dust, vibration, and spatial volume is limited, and therefore, totally-enclosed is a kind of effective means that improves the motor reliability.But adopt totally-enclosed after, the heat that motor internal distributes is difficult to be taken away by cooling air, therefore, it is very fast that the rotor temperature rises, the heat of motor internal is passed to bearing rapidly by rotating shaft, end cap position, makes the bearing temperature fast rise.Because the permission temperature rise of motor stator and rotor is generally 180K even 200K, and the permission temperature rise of motor bearings 55K only, therefore, the heat radiation of the bearing of totally-enclosed traction electric machine becomes one of outstanding problem that influences its useful life and reliability.

At present, adopt the mode that reduces motor electromagnetic load and heating factor usually, reduce the temperature rise of motor stator and rotor, with the overheated bearing burnt that causes of prevention motor bearings.But so,, increased motor volume and weight, reduced the cost performance of motor though guaranteed the bearing reliability.

Summary of the invention

The utility model provides a kind of traction electric machine with circulated air terminal lid arrangement for the problem that solves the bearing heat radiation that has the motor existence now.

The utility model is realized that by following technical scheme a kind of traction electric machine with circulated air terminal lid arrangement comprises motor stator, and the end cap body that is connected with motor stator is connected with interior fan housing on the end cap body; Be placed in the internal sealed ring on the machine shaft, interior fan housing and internal sealed ring are realized sealing by staggered cooperation of maze trough; Be placed in the outer seal ring on the machine shaft; Internal sealed ring, outer seal ring and bearing cap form the bearing chamber that holds bearing, the distinguished and admirable outdoor air intake guard that is provided with of the hub-type that forms at interior fan housing and end cap body and bearing cap.

Adopt the wheel hub mode, bearing chamber is fixed in the end cap center; Interior fan housing is established in the end cap inboard, with the inside and outside air insulated of motor, and forms the independent ventiduct that centers on bearing chamber; The end cap outside dirt guard of setting up defences stops foreign matter, guarantees that wind path is unobstructed; Internal sealed ring designs multiple tracks annular labyrinth seal groove, guarantees the effective isolation and the bearing chamber seal request of inside and outside wind path; Outer seal ring cylindrical and bearing cap inner circle all design annular seal groove, guarantee bearing chamber sealing property and rotation reliability.

Compared with prior art, adopt the totally-enclosed traction electric machine of structure described in the utility model, have the following advantages:

Interior fan housing is effectively isolated the hot-air and the bearing chamber of motor internal, prevents to cause bearing running hot because of coil temperature rise is high, has guaranteed the bearing operational reliability.Efficiently solve the high and little contradiction of bearing temperature rise of coil temperature rise in the totally-enclosed machine design, the motor electromagnetic load is strengthened, volume weight reduces, and cost performance is improved.Design independently natural wind cooling wind path, improved the motor bearings cooling condition, reduced bearing temperature rise, improved the useful life of bearing.Adopt the circulated air line structure of cast form and assembly welding, optimize manufacturing process, reduce design cost.The axial arranged compactness of motor, rational in infrastructure, axial dimension changes little.Can be used for various interchanges, direct current machine, Totally-enclosed-type traction electric machine especially, adaptability is strong.

Description of drawings

Fig. 1 is an end view of the present utility model

Fig. 2 is the A-A profile of Fig. 1

Among the figure: fan housing, 4-bearing, 5-internal sealed ring, 6-tight fixed bolt, 7-machine shaft, the outer seal ring of 8-, 9-bearing cap, 10-air intake guard, 11-tight fixed bolt in 1-end cap body, 2-motor stator, the 3-

Embodiment

As schematically shown in Figure 2, a kind of traction electric machine with circulated air terminal lid arrangement comprises motor stator 2, the end cap body 1 that is connected with motor stator 2, fan housing 3 in being connected with on the end cap body 1; Be placed in the internal sealed ring 5 on the machine shaft 7, interior fan housing 3 and internal sealed ring 5 cooperate by maze trough is staggered; Be placed in the outer seal ring 8 on the machine shaft 7; Internal sealed ring 5, outer seal ring 8 and bearing cap 9 form the bearing chamber that holds bearing 4, the distinguished and admirable outdoor air intake guard 10 that is provided with of the hub-type that forms at interior fan housing 3 and end cap body 1 and bearing cap 9.

End cap body 1: adopt forging type, be beneficial to wheel hub and wind path and be shaped; Bearing is laid in machining bearing chamber, middle part; The bearing chamber outer wall is attenuate under enabled condition, is beneficial to the bearing heat radiation; Bearing chamber inner side end processing labyrinth annular groove is realized bearing chamber sealing and cleaning.On the medial surface of end cap outer, be processed with the cylindrical positioning spigot of the degree of depth 2 ~ 3mm, the welding of fan housing location in being beneficial to; Spoke is uniformly distributed along the circumference, and is extended into uniform support level to the inside, circle positioning spigot in forming after processing; Interior fan housing 3 has guaranteed the integral rigidity of assembly welding precision and end cap device by inside and outside round positioning spigot and the welding of end cap body.

Motor stator 2: the end cap device connects with motor stator by positioning spigot.

Interior fan housing 3: adopt casting technique to cast the dish type blank, process inside and outside round positioning spigot after, be welded as a whole with the end cap body, form the wind path that independently circulates; Behind an

item

1 and 3 assembly welding, according to normal process flow, the ring-like maze trough of processing each size of end cap and fan housing inboard.

Bearing 4: by common design specification selection standard bearing.

Internal sealed ring 5: hot jacket has multiple tracks annular maze trough successively along the seal ring diametric(al) on machine shaft, respectively with interior fan housing, end cap body on staggered cooperation of maze trough, the isolation of inside and outside air of realization motor, and bearing chamber positiver sealing.

Tight fixed bolt 6.: be uniformly distributed along the circumference, bearing cap and end cap body are fixedly connected.

Machine shaft 7: internal sealed ring, bearing inner race and outer seal ring are successively by circle in the location, and hot jacket guarantees that Bearing Installation is correct on machine shaft, and sealing is reliable.

Outer seal ring 8: hot jacket is on machine shaft, and cylindrical is processed annular maze trough and realized the bearing chamber sealing.

Bearing cap 9:, guarantee that the bearing outer ring installation is correct by common technical specification design; Bearing cap endoporus place is processed with annular groove, cooperates with outer seal ring, to guarantee the bearing chamber good seal.

Air intake guard 10: adopt porous web plate or thin plate punching to form, can weld or screw is anchored on the end cover body, be used to prevent that foreign matter from stopping up wind path, keep wind path unobstructed.

Tight fixed bolt 11: be uniformly distributed along the circumference, end cap device and motor stator are fixedly connected.

Claims

1, a kind of traction electric machine with circulated air terminal lid arrangement is characterized in that: comprise motor stator (2), the end cap body (1) that is connected with motor stator (2) is connected with interior fan housing (3) on the end cap body (1); Be placed in the internal sealed ring (5) on the machine shaft (7), interior fan housing (3) and internal sealed ring (5) cooperate by maze trough is staggered; Be placed in the outer seal ring (8) on the machine shaft (7); Internal sealed ring (5), outer seal ring (8) and bearing cap (9) form and hold the bearing chamber of bearing (4), at the distinguished and admirable outdoor air intake guard (10) that is provided with of the hub-type of interior fan housing (3) and end cap body (1) and bearing cap (9) formation.