CN1302470A

CN1302470A - Electric machine

Info

Publication number: CN1302470A
Application number: CN99806474A
Authority: CN
Inventors: H·P·萨姆巴思
Original assignee: Brook Motors Ltd
Current assignee: Brook Motors Ltd
Priority date: 1998-04-02
Filing date: 1999-04-06
Publication date: 2001-07-04
Also published as: CA2326591A1; JP2002521994A; KR20010034726A; EP1070379A1; HK1020238A1; GB9807023D0; AU3429599A; GB2336038A; AU748375B2; GB2336038B; WO2000005800A1

Abstract

In an electrical machine such as electric motor or generator comprising a casing which contains rotatable components air direction means is provided and constructed and arranged to direct an air current over the exterior of the machine. The air direction means may be in form of a cowl which may be an extension of or secured to a fan housing.

Description

Motor

The present invention relates to motor, relate in particular to a kind of alternating current motor.

Knew already that motor was on-stream, as because the friction in winding resistance and the bearing can produce undesirable heat.Also know, cooling device and fan are set, with the blows air over cooling pipe.For example GB-2115987B discloses a kind of alternating current motor with cooling pipe, and some cooling pipes are by stator, and some passes through rotor.

The purpose of this invention is to provide another kind or other cooling device.

According to the present invention, a motor comprises being configured with dosage and guides air stream to flow through the air guiding device of machine exterior.

This air guiding device can encase the machine exterior of part at least, and comprises and lead cover, the extension of it or blower-casting, or be fixed in blower-casting.This is led cover and can extend from the blower-casting that is in machine one end, cover machine to the small part appearance, do not have air gap leading between cover and the appearance, for example wind guide tank.

This leads cover can be fixed in any suitable machine part.For example, if machine comprises an alternating current motor with a stator and a rotor, stator and rotor comprise lamination separately, then lead cover and can be fixed in stator lamination at motor one end, the pressure plare that stator lamination is kept together, or a support.

Air guiding device can comprise an air baffle that is in the blower-casting, is frustum of a cone or cylindrical.Baffler can be integrally formed in the housing, or is fixed thereon.

Air guiding device is especially led cover or the also bootable air of baffler and is passed through as in the stator lamination, in the rotor lamination and/or at least one hole between stator and the rotor.

Air guiding device can comprise the projection that at least one is fixed in the machine appearance or forms or be close to its setting thereon, makes cooling air " scrub " this outer surface.This projection can limit one or many wind guide tanks that air passes through, can with some or all monolithic molding of leading cover, end frame, pressure plare or lamination.

The stator winding protection can be set lead cover, so that live winding at each end cap of for example stator.This leads cover can be connected in end frame, pressure plare or stator itself.

One end plate can be set, be completely enclosed within the two stands.This end plate can be fixed in the part by the bearing of a supporting in this two stands, and the axle that supports this rotor rotates in this bearing.

Referring now to these accompanying drawings, one embodiment of the present of invention only are described as an example, i.e. alternating current impression motor, wherein:

Fig. 1 represents the longitudinal section by motor, and in this example, this motor is an alternating current impression motor of the present invention;

Fig. 2 represents along the sectional elevation of the II among Fig. 1-II line by the stator lamination heap;

Fig. 3 represents the perspective view of this stator lamination heap;

Fig. 4 represents the perspective view of pressure plare;

Fig. 5 represents fan and the perspective view of leading the modification structure of cover.

In the accompanying drawings, especially comprise a rotor 10 that is installed on the axle 11 at the alternating current impression motor shown in Fig. 1, this rotor can rotate around the axis 0-0 that is configured in two ends frame 14,15 bearing 12,13 in each, one stacked stator 16 is clipped between two pressure plares 17,18, one of each plate supporting two ends frame 14,15.

Rotor 10 comprises some circle or salient pole laminations that get off from the electric steel plate upper punch, and these laminations are maintained between the end ring 19,20.In these laminations, be provided with some groove (not shown)s, and extend radially inwardly from these laminations.Constitute busbar 21 in these grooves, end ring 19,20 and busbar 21 are made through die casting by aluminium alloy, constitute known cage-shaped structure.Rotor lamination is provided with some cooling grooves 22 along the circle spacing equally, expresses one of them among Fig. 1.Lamination rotor 10 and rotor end ring 19,20 all are fixed in axle 11, therewith rotate.

Stator 16 does not have closure, and it comprises some laminations that got off by the electric steel plate upper punch, has the shape of concrete expression in Fig. 2.Each stator lamination is roughly square, but removes four angles, and therefore, whole shape is an octangle, and wherein four edges is bigger than all the other four edges.These laminations are provided with eight cooling grooves, and the section of every groove is roughly triangle.These cooling grooves dispose every pair of each minor face of vicinity in pairs.These laminations are sandwiched between the pressure plare 17,18, and this assembly is firmly held in together by bar 25, pass the cooling groove 24 in the stator lamination, and pass the respective groove 29 in the pressure plare.The end of these bars is shaped on screw thread, and is provided with nut 28, and with tensioning pressure plate 17,18, but an end of bar can be shaped on head, and other end equipment tensioning nut.Perhaps, this stator lamination can by chock or firm welding be maintained between the pressure plare.These pressure plares also respectively are provided with cooling groove 29, and their size and dimension is identical with cooling groove 24 in the stator lamination basically, and alignment mutually.

As can see from Figure 2, circular hole 33 and some grooves 34 during stator lamination comprises in one from this circular hole radiation, described rotor rotates in this circular hole.Fill out with stator winding, as shown in Figure 1 in these grooves.

Two ends frame 14 and 15 is fixed on each pressure plare, and the pressure plare 17 and 18 in they and the stator 10 has roughly the same square shape and size.Each end frame 14,15 has an end 30,31 perpendicular to axle 11 extensions.Each end 30,31 comprises and supports a bearing 12,13, supports this axle in rotatable mode.There is an end plate end 30 on the end frame 14, is in the chamber that is made of end frame 14, and this end plate has the terminal that is installed on the adapter, and this adapter also is used as the overhang bracket of bearing 12.Connect the lead (not shown) and directly extend to end plate, and also be connected in pressure plare 17 from the hole 37 that the ventilation protection of stator winding 35 in being in the end frame led in the cover 38.Described axle passes protects the centre bore 39 of leading in the cover.Some electric wire (not shown)s are transported to end plate from external power with electric power, and they are by the follower (not shown) in end plate 14,15 suitable positions.In end frame chamber, the end frame that end plate has saved common exterior arrangement is set, and has avoided being in the relevant problem in realistic appropriate location (right side or left side top) with the end frame.

The other end 31 on other end frame 15 is provided with hole 40, and cooling air can be through this hole from the fan 41 places input that is in outside the end frame 15.Fan 41 is electrically driven (operated), separates with alternating current motor, maybe can be installed on side.

Fan 41 disposes like this, can rotate around the axis 0-0 identical with axle 11, is in the housing of being made by the material of molded plastics or preparation 69.Housing 69 has net grid 42, is in the end wall vertical 43 with axis 0-0, but through this net grid suction air, and force its to flow through the appearance of motor along axial direction roughly, and flow path respectively cools off groove.The shape of cross section of this housing approaches to hold the shape of frame 15, but the special top side 44 that level is arranged, two vertical 45,46 and four tiltedly

short sides

47,48,49,50 of special side, these sides are greater than the respective side of end frame 15, pressure plare 17,18 and stator 16, as can see from Figure 2.Special side 44, two vertical

special sides

45,46 of top, horizontal and top two

short sides

47 and 48 as shown in Figure 2, particularly as shown in Figure 5, are all extended, and form the top and the leading of two sides that cover end frame 15 and cover 60.Form the gap between the sides adjacent of inner surface of leading cover and support, but do not form the gap at the special side of lower horizontal 51 places, shell rim 52 covers the bottom of end frame 15 a little there.Can form little gap at the special side of lower horizontal 51 places, edge 52 does not cover the bottom of end frame 15 yet.Short cylinder baffler 54 is integrally molded with the interior table of the end wall 43 of blower-casting or be connected this baffler encirclement fan blade.The inner radial surface 55 of baffler is a frustum of a cone, helps to guide the air flow motor.

The two end framves 14,15 of pressure plare 17,18 and the special side of laminated stator 16 are equipped with two projections 53,56.These protrusions parallel are in the motor axis 0-0 arrangement that is in line, as advertise by fan through lead gap between cover 60 and the end frame 15, axially along the guider of the outer surface flow air of motor especially stator 16.So, between adjacent projection, formed the groove that guides air.

Projection 56 in the bottom provides elongated bearing for motor, so that be shelved on the Horizontal Branch bearing surface, does not lead cover owing to being provided with in the bottom, therefore, is directed to the there from the fan place at air, unless leave little gap at 52 places, edge of downside 51.

In use, net grid 42 suction airs of fan 41 in housing 69, and through projection 53 (if leave little gap in the edge of downside 51, then and 56) between groove, hole 40 in the end frame, and this after the guide groove in the rotor, through stator and gap between rotor, or the guide groove in pressure plare and stator 29,24 forces air shaft to flowing through the motor surface.Can make air along reverse flow.

Winding protection can be set lead cover, be similar to as shown in Figure 1 cover the left side winding lead the cover 38, cover the right side stator winding.

In a modified model, saved the end face and the projection on the side 53 of right-hand end frame.Replacing corresponding projection 70 is to be molded together with leading cover inner surface, or interfixes, as shown in Figure 5.

The present invention is applicable to the AC and DC motor of all other types with laminated stator frame structure.This comprises cylindrical, the rotor/stator of mouse cage and non-squirrel-cage magnetic pole and the magnetic pole and the phase windings of varying number.

Claims

1. a motor comprises by body plan and configuration guiding air stream to flow through the air guiding device of this machine outer surface.

2. motor as claimed in claim 1 is characterized in that this air guiding device covers at least a portion outer surface of this machine.

3. motor as claimed in claim 2 is characterized in that this air guiding device comprises to lead cover, it or blower-casting one extension, or be fixed in blower-casting.

4. motor as claimed in claim 3, oneself is in the blower-casting extension of this machine one end to it is characterized in that this leading cover, and covers at least a portion outer surface of this machine, is provided with the gap described leading between cover and the outer surface.

5. as claim 3 or 4 described motors, it is characterized in that this motor comprises an alternating current motor with certain and a rotor, each free lamination of stator and rotor is formed, this is led, and cover is fixed in stator lamination and a pressure plare or at the support of motor one end, pressure plare keeps together stator lamination.

6. as the described motor of one of claim 3 to 5, it is characterized in that air guiding device comprises an air baffle that is in the blower-casting, this baffler is the circular cone of butt or cylindrical.

7. motor as claimed in claim 6 is characterized in that this baffler monolithic molding in described housing, or is connected with it.

8. the described motor of arbitrary as described above claim is characterized in that air guiding device also guides air through at least one hole in the machine.

9. the described motor of arbitrary as described above claim is characterized in that air guiding device comprises that at least one is fixed in machine outer surface or projection that form or that be close to its configuration thereon.

10. motor as claimed in claim 9 is characterized in that this projection can limit one or more groove that supplies air to pass through.

11. the described motor of arbitrary as described above claim is characterized in that comprising that one is with the stator of winding and the stator winding protection at its at least one end to lead cover.

12. motor as claimed in claim 11 is characterized in that this leads cover and be connected in an end frame, a pressure plare or stator itself.

13. the described motor of arbitrary as described above claim is characterized in that comprising two supports and an end plate that is completely enclosed within one of this two support.

14. basically as the reference accompanying drawing described in this article and in the accompanying drawings shown in a kind of motor.