CN208904787U - Permanent magnet high-speed motor and its rotor magnetic steel fixed structure - Google Patents

Abstract

The utility model discloses a kind of permanent magnet high-speed motor comprising rotor, stator, base and end cap；The rotor is located on base by bearing, and the stator is located at the periphery of rotor；The rotor includes shaft and the magnet steel that is located at outside shaft, and the carbon fiber sleeve for fixing magnet steel, it is characterized by: it is in inner big outer small conical section that the shaft, which includes for magnet steel is arranged, a wedge-shaped tapered sleeve matching with taper hole and with conical section interference fit is provided with outside the conical section, the magnet steel is located at the outer surface of wedge-shaped tapered sleeve, it is externally provided with carbon fiber sleeve in magnet steel, for fixing magnet steel；The oilhole for extending to wedge-shaped tapered sleeve inner surface is equipped on the wedge-shaped tapered sleeve.The utility model solves the problems, such as that the magnet steel of existing permanent magnet high-speed motor is not fixed firmly using carbon fiber sleeve binding-type, generates a possibility that centrifugation gap and vibration when can eliminate rotor high speed rotation between magnet steel and shaft.

Description

Permanent magnet high-speed motor and its rotor magnetic steel fixed structure

Technical field

The utility model relates to a kind of permanent magnet high-speed motors, the rotor magnetic steel fixed structure of the motor, belong to motor technology Field.

Background technique

Permanent magnet high-speed motor, which can be applied, directly drives the occasions such as electricity generation system in such as aerator, compressor, gas turbine, uses To replace the common combination for adding gear-box using low speed asynchronous machine before.There is power density height, it is small in size, it is light-weight, It is high-efficient, the characteristics of high reliablity.Exclusive advantage is all embodied in performance in all respects.

The rotor magnetic steel of permanent magnet high-speed motor is generally fixed using carbon fiber winding, however, in high-power situation There are following technological difficulties for it:

First, magnet steel fixation problem: because rotor linear velocity is high, the centrifugal force that permanent magnet generates is big, on the one hand needs rotor Protection is not so that permanent magnet generates big radial displacement, and to generate the phenomenon that rotor touches stator, another aspect will also guarantee to turn The reliability of the mechanical strength of the transmitting and permanent magnet of square；The mode of the fixed magnet steel of currently used carbon fiber sleeve exists Pressing force is inadequate, and under the effect of high speed centrifugation power, magnet steel is easy to generate gap between shaft, generates segregation phenomenon, and then lead Vibration characteristics deterioration is caused, balance is on the hazard；Since carbon fiber thermal expansion and shrinkage characteristic are undesirable, using thermal expansion and Shrinkage method cannot eliminate gap, cannot provide good pretightning force, and centrifugation gap and vibration are easy to produce when running at high speed.

Second, motor radiating problem, because rotor loss is big, and since the presence of rotor sleeve heat dissipation is difficult；It is easy to There is the case where motor overheating, and then causes permanent magnet that irreversible loss of excitation occurs.Motor speed is high, if rotor be designed to it is soft Property rotor, then there may be across critical speed the problem of, when serious, or even can be because resonating excessive damage motor.

In order to avoid ultrahigh speed magneto overheats, those skilled in the art have developed a variety of cooling knots in succession Structure can be divided into air-cooled structure, water-cooling structure, oily air-cooled structure and hydrogen-cooled structure.Currently, air-cooled structure is the most universal, mainly because of it Cooling structure is the simplest, and cooling cost is minimum, but its cooling effect is the most general, and especially air-cooled mode also will increase Windmill consumption, while being accompanied by biggish noise.For water-cooling structure and oily air-cooled structure, cooling structure is substantially the same, main It distinguishes and is cooling medium, but current water-cooling structure and oily air-cooled structure, all just in the cooling of stator, consideration turns The cooling of son, thus it is still to be improved on cooling effect.

CN 206712615U discloses a kind of ultrahigh speed magneto sleeve rotor cooling structure, and shaft uses hollow knot Structure, central duct are rotor axial cooling water channel；Base outer is set with cooling jacket, and stator week is equipped with inside cooling jacket To spiral cooling water channel；Cooling jacket one end is equipped with cooling end cap of intaking, and cooling end cap of intaking is sleeved on shaft one end；Cooling water It covers the other end and is equipped with the cooling end cap of water outlet, be discharged cooling end cap and be sleeved on the shaft other end；Stator circumferential direction spiral cooling water channel according to It is secondary to be connected by the cooling end cap of water inlet and rotor axial cooling water channel with cooling end cap is discharged；It is provided on cooling jacket cold But water inlet and cooling water outlet, cooling water inlet are communicated with the water inlet end of stator circumferential direction spiral cooling water channel, cooling water outlet It is communicated with the water outlet for being discharged cooling end cap.The technical solution is will to carry out cooling water cooling to stator to guide to shaft central hole In cooled down.The disadvantage is that the accuracy of manufacture requires high, seal request height at coolant liquid exchange between rotor and stator, because This, a kind of written those skilled in the art of high-speed permanent magnet motor with good cooling effect of structure manufacture simply easy to process The target that member pursues always.

Therefore, can make to reach ideal preload value between carbon fiber sleeve and magnet steel, magnet steel and shaft, so as to reality Now high speed lower rotor part runs smoothly, and gapless is generated with vibration；And heat dissipation problem and easily fabricated life can be solved very well A kind of permanent magnet high-speed motor and its rotor magnetic steel fixed structure produced becomes the target that those skilled in the art pursue.

Summary of the invention

The purpose of this utility model solves existing permanent magnet high-speed motor, and magnet steel pre-tightens fixed preload in rotor structure Power and preload value are small, and then are easy to produce the technical issues of centrifugation gap is with vibrating.

The another object of the utility model is to solve existing permanent magnet high-speed motor, existing ultrahigh speed permanent magnet motor stator It is all made of water cooling with rotor, its structure is complicated, the problem excessively high for the sealing requirements of rotor.

To achieve the above object, the utility model provides a kind of permanent magnet high-speed motor comprising rotor, stator, base and End cap；The rotor is located on base by bearing block, and stator is located at the periphery of rotor；The rotor include shaft, be located at turn Magnet steel outside axis and the carbon fiber sleeve for fixing magnet steel, it is characterised in that: the shaft includes for magnet steel to be arranged In inner big outer small conical section, be provided with outside the conical section one it is matching with taper hole and with the conical section The wedge-shaped tapered sleeve of interference fit, the magnet steel are located at the outer surface of wedge-shaped tapered sleeve, are externally provided with carbon fiber sleeve in magnet steel, for solid Determine magnet steel；The oilhole for extending to wedge-shaped tapered sleeve inner surface is equipped on the wedge-shaped tapered sleeve.

Wherein, in order to cool down motor stator very well, the base includes two end plates in annulus plate-like for being located at end； Inner water sleeve, outer water jacket are successively fixed with from inside to outside between two end plates, in the outer surface of the inner water sleeve or outer water jacket Continued circling is equipped with waterway wall on surface, after the inner water sleeve and outer water jacket grafting, forms ring between the adjacent waterway wall Around water channel.

Wherein, in order to cool down motor stator very well, preferably, between the two end plates of the base and being located at outer water Set is outer and compartment of terrain is equipped with windband therewith, forms closed air duct between the windband and the outer water jacket and two end plates, Wind item is provided in the air duct, there are channels between end plate at the both ends of the wind item；The wind item is multiple and circumferentially It is uniformly distributed；The base both ends are equipped with two vents of connection base inner chamber body and air duct.

Wherein, in order to cool down rotor and stator very well, the front position that the shaft is located at magnet steel is equipped with flabellum, turns The tail end center of axis is equipped with the cooling hole in blind hole shape, and the position before the flabellum, which is equipped with, leads to center cooling hole Oblique air holes.The front refers to the direction towards driving end side.

The utility model provides a kind of rotor magnetic steel fixed structure of permanent magnet high-speed motor comprising shaft, magnet steel, carbon fiber Tie up sleeve, which is characterized in that it is in inner big outer small conical section that the shaft, which includes for magnet steel is arranged, in the conical section It is provided with a wedge-shaped tapered sleeve matching with taper hole and with conical section interference fit outside, the magnet steel is located at wedge The outer surface of shape tapered sleeve is externally provided with carbon fiber sleeve in magnet steel, for fixing magnet steel；It is equipped with and extends on the wedge-shaped tapered sleeve The oilhole of wedge-shaped tapered sleeve inner surface.

Wherein, the taper of the rotating shaft conical section and wedge-shaped tapered sleeve inner surface are as follows: 1:50~1:150.

Wherein, it is equipped with flange in the outer end of the wedge-shaped tapered sleeve, for the axial limiting of magnet steel, the flange is equipped with limit Make the spacer pin of the magnet steel circumferential movement；The outer end for being located at the wedge-shaped tapered sleeve in the shaft is equipped with a baffle ring.

Wherein, there is annular groove at the wedge-shaped tapered sleeve inner surface and the oil filler point perforation.

Use above-mentioned pre-pressing structure to rotor magnetic steel pre-tension method for magnet steel to be mounted on to the appearance of wedge-shaped tapered sleeve first Face, and magnet steel is limited circumferentially by the spacer pin in wedge-shaped tapered sleeve end flange；It is tied up with carbon fiber in magnet steel outer surface Bundle forms carbon fiber sleeve, for fixing magnet steel；The wedge-shaped tapered sleeve for installing magnet steel is covered on the conical section of shaft, is then passed through The oil filler point of wedge-shaped tapered sleeve injects hydraulic oil between wedge-shaped tapered sleeve and shaft；After wedge-shaped tapered sleeve spreading, wedge-shaped tapered sleeve is pacified It is attached to position, then stops injection high pressure oil, completes installation and preload between wedge-shaped tapered sleeve and shaft.

The utility model due to the adoption of the above technical scheme, adds between shaft in the rotor magnetic steel of permanent magnet high-speed motor One wedge-shaped tapered sleeve, shaft are conical section in the position of setting magnet steel, are cooperated with wedge-shaped tapered sleeve, can be convenient wedge-shaped tapered sleeve suit In shaft, and make between the two to be interference fitted, it is possible thereby to magnet steel be first fixed on to the outer surface of wedge-shaped tapered sleeve, in wedge Baffle ring is fixedly installed outside shape tapered sleeve, then is injected between wedge-shaped tapered sleeve and shaft mating surface by hydraulic oil, in the work of hydraulic oil Under, wedge-shaped tapered sleeve is expanded, and then be installed in place with shaft, therefore, provide reliable pretightning force, rotor can be eliminated A possibility that centrifugation gap and vibration are generated when high speed rotation between magnet steel and shaft.

The utility model further sets base to the structure type of inner-outer sleeve nesting, inner water sleeve outer surface or Spiral helicine waterway wall is arranged in the inner surface of outer water jacket, so that forming water stream channel between waterway wall, is used for stator water-cooling But.Further, it is equipped with windband in the outside of outer water jacket, forms air duct, the cavity company in air duct and motor between outer water jacket and windband Logical, therefore, the hot wind of machine cavity side enters air duct, and after cooling water channel is cooling, recycling converges to the another of machine cavity Side；Therefore on the one hand the structure of base ensure that the function of the fixed installation of motor part, while provide effectively to stator Cooling, processing and manufacturing is simple, and for rotor be then hot wind using air-cooled structure type, after cooling rotor through base outside Air duct circulating cooling after return in cavity, therefore its rotor and stator can effectively radiate, and cooling effect is very good.

Detailed description of the invention

Fig. 1 A, 1B are the diagrammatic cross-section and end view of the permanent magnet high-speed motor of the utility model；

Fig. 2 is the rotor magnetic steel fixed structure schematic diagram of the permanent magnet high-speed motor of the utility model；

Fig. 3 is the cross-sectional view of the wedge-shaped tapered sleeve of the permanent magnet high-speed motor of the utility model；

Fig. 4 A, 4B are the sectional view and structural schematic diagram of the base of the permanent magnet high-speed motor of the utility model.

Wherein, rotor 1, shaft 11, conical section 12, magnet steel 13, magnet steel stomidium 131, wedge-shaped tapered sleeve 14, flange 141, flange Hole 142, oil filler point 143,144 carbon fiber sleeve 15 of annular groove, magnetic bridge 16, baffle ring 17, spacer pin 18, flabellum 19, cooling hole 110, oblique air holes 111, stator 2, base 3, end plate 31, inner water sleeve 32, outer water jacket 33, waterway wall 34, water channel 35, windband 36, Air duct 37, wind item 38, support 39, air holes 310, non-drive end cap 41, driving end end cap 42, transverse bearing 51, bearing block 52, axis Hold 53, bearing cap 54, transverse bearing 55, thrust bearing 56, bearing 57, bearing block 58, bearing cap 59, outlet box 7.

Specific embodiment

Embodiment 1 illustrates permanent magnet high-speed motor described in the utility model referring to Fig. 1 in figure comprising rotor 1 is determined Sub 2, base 3 (or casing) are located at the non-drive end cap 41 and driving end end cap 42 at both ends；Wherein, rotor 1 is set by bearing block On non-drive end cap 41, driving end end cap 42 and base 3, the non-end driven end cap 41 and be fixed on base 3 comprising with machine The cover boards and outwardly extending stepped two parts sleeve of 3 connection of seat, are provided with transverse bearing at the sleeve of inner end 51, it is equipped with bearing block 52 at the sleeve of outer end, for installing bearing 53, bearing cap 54 is equipped on the outside of bearing 53；Drive end end cap 42 have the sleeve part for bearing to be arranged, and are inside successively equipped with transverse bearing 55, thrust bearing 56 and bearing from inside to outside 57, bearing 57 is fixed on driving end end cap outer end by bearing block 58, and 58 end of bearing block is equipped with bearing cap 59；Above base 3 Equipped with outlet box 7.

Stator 2 is located at the periphery of 1 magnet steel of rotor；Rotor 1 includes shaft 11 and the magnet steel 13 being located at outside shaft 11, shaft 11 It is fixed in base 3 by bearing 53,57, transverse bearing 51,55, thrust bearing 56；Carbon fiber sleeve 15 is located at magnet steel external application In fixed magnet steel 13；Wherein, the position system for magnet steel 13 to be arranged of shaft 11 is in inner big outer small conical section 12, in the taper A wedge-shaped tapered sleeve 14 matching with taper hole and with the conical section 12 interference fit, magnet steel 13 are provided with outside section 12 It is located at the outer surface of wedge-shaped tapered sleeve 14, carbon fiber sleeve 15 is externally provided in magnet steel 13, for fixing magnet steel 13；In wedge-shaped tapered sleeve 14 It is equipped with and extends to shown in oil filler point 143(Fig. 3 of wedge-shaped 14 inner surface of tapered sleeve), in order to which pressure oil is even into wedge shape cone It covers the position that 14 inner surfaces and oil filler point 143 penetrate through and is equipped with annular groove 144.

Further, in conjunction with Fig. 4 A, 4B, base 3 includes two end plates 31 for being located at end, and end plate 31 is in annulus plate-like, Bottom is equipped with support 39；Fixed installation of the end plate 31 for non-drive end cap 41 and driving end end cap 42；Between two end plates 31 according to It is secondary to be fixed with inner water sleeve 32, outer water jacket 33 from inside to outside, on the outer surface of the inner water sleeve 32 or the inner surface of outer water jacket 33 Continued circling is equipped with waterway wall 34 and is formed between the adjacent waterway wall 34 after 33 grafting of the inner water sleeve 32 and outer water jacket Circular water channel 35.

The water channel 35 is spiral surrounding setting or is multiple U-shaped water channels.

Windband 36, windband 36 and outer water jacket 33 and two end plates are externally provided between two end plates 31 and positioned at outer water jacket 33 Closed air duct 37 is formed between 31, wind item 38 is provided between the windband 36 and outer water jacket 33, the both ends of wind item 38 are extremely There are channels between end plate 31.The wind item 38 is uniformly distributed along the circumference for several.The both ends in air duct 37, i.e., in inner water sleeve 32 and outer water The end of set 33 is equipped with two vents 310 of connection 3 inner chamber body of base and air duct 37.The intracorporal hot wind of 3 chamber of base is through air holes 310 Into air duct 37, after hot wind is cooling, cavity is entered by other side air holes 310, with cavity inner stator 2,1 heat exchange of rotor.

The front position that shaft 11 is located at the close driving end side of magnet steel is equipped with flabellum 19, at 11 tail end centers of shaft Position is equipped with the cooling hole 110 in blind hole shape, and the position before flabellum 19 is equipped with the oblique wind for leading to center cooling hole 110 Hole 111.Flabellum 19 be located at close to driving end, magnet steel 13 front, and towards magnet steel (towards anti-drive end be arranged), by wind to Gap between magnet steel and stator；Oblique air holes 111 is located at the front at the close driving end of the flabellum 19；Flabellum 19 is with axis Integral structure, flabellum 19 protrude from the 11 preferred 4-5mm of periphery 3-6mm(of shaft), 19 length direction of flabellum and shaft 11 Axial k at an angle obliquely arranges that the angle k is between 23-30 degree.

As shown in Figure 1, since there are gaps between rotor 1 and stator 2, in 11 rotary work of shaft, flabellum 19 will be to Gap air-supply, so that the hot-air for being located at gap location is blown in the non-driven side cavity of gap stator, thus by magnet steel 13 Generated heat is taken away in time, plays the role of cooling down to magnet steel 13；And enter air duct 37, warp through the air holes 310 on base 3 The cooling air of water drives the air holes 310 of end side to flow out under the guiding role of wind item 38 from base 3.

As shown in Fig. 2, the tail end of the shaft 11 is also formed with the cooling hole 110 of blind hole form, the cooling along axial direction The inner end in hole 110 is connected to 11 surface of shaft further through 3-6 oblique air holes 111, in the present embodiment, described oblique The same side that outlet and the flabellum 19 of air holes 111 are respectively positioned on the gap (is located at the stator close to driving end one Side)；In order to form preferable heat exchange cycle, it is equipped with from inside machine cavity on the bearing block of 11 tail end of shaft to the shaft The return air channel of cooling hole 110, the contents of the section the applicant another company apply No. 201721683880.2 it is practical It has been described in new patent, is not repeating herein.

Above-mentioned specific structure as a result, the cooling water channel 35 outside stator 2 cool down the stator of motor, meanwhile, if Air-cooled to carrying out between the gap between rotor and stator in the flabellum 19 in shaft 11, hot wind in base 3 is from one end (non-drive Moved end) base 3 is returned to after the air duct 37 that enters outside cooling water channel 35 of air holes 310 is cooling drives in the cavity at end；Cooling water channel 35 Hot-air in stator 2 and air duct 37 is cooled down by inlet and outlet access cooling water.The cooling of rotor is by shaft Cooling flabellum 19 is arranged on 11 to be cooled down, hot wind is (non-driven by the cooling air channel 37 and tail end for being located at face outside base End) return air channel on bearing block returns in shaft cooling hole 110, and is returned in the cavity for driving end by oblique air holes 111, Its temperature that can quickly reduce stator 2 and rotor magnetic steel 13, effectively improves heat dissipation effect.

Embodiment 2 illustrates the rotor magnetic steel fixed structure of permanent magnet high-speed motor comprising shaft referring to fig. 2, in figure 11, it is located at the magnet steel 13 on 11 surface of shaft, adjacent interpolar is equipped with magnetic bridge 16;Carbon fiber sleeve is equipped in 13 outer surface of magnet steel 15, the carbon fiber sleeve 15 is for fixing magnet steel 13；Described in embodiment as above, the utility model is characterized in that, shaft 11 is used for The position of magnet steel 13 is set, is inner big outer small conical section 12, it is matching with taper hole that one is provided on conical section 12 And with the conical section 12 interference fit wedge-shaped tapered sleeve 14, at this point, magnet steel 13 to be located to the outer surface of wedge-shaped tapered sleeve 14, carbon Fiber sleeve 15 is located at outside magnet steel 13, the fixation for magnet steel；Referring to Fig. 3, it is equipped in the end of wedge-shaped tapered sleeve 14 and extends to wedge The oil filler point 143 of 14 inner surface of shape tapered sleeve, the oil filler point 143 are used to inject high pressure between wedge-shaped tapered sleeve 14 and shaft 11 Oil, to be installed in place by wedge-shaped 14 spreading of tapered sleeve, and by wedge-shaped tapered sleeve 14.

Wherein, the taper of 14 inner surface of rotating shaft conical section 12 and wedge-shaped tapered sleeve are as follows: 1:50~1:150, preferably 1:60~ 1:100, the ratio that the present embodiment is selected are 1:80.

Preload amount between wedge-shaped tapered sleeve 14 and shaft 11 is determined according to the revolving speed of shaft, the centrifugal force of magnet steel, general to select Select 0.1-1.5mm.

It is equipped with flange 141 in the outer end of wedge-shaped tapered sleeve 14, for the axial limiting of magnet steel 13, on flange 141 and magnet steel 13 end faces are respectively provided with the flange hole 142 and magnet steel stomidium 131 of setting spacer pin 18, and spacer pin 18 limits magnet steel 13 and does week To movement.Baffle ring 17 is arranged in the outer end for being located at the wedge-shaped tapered sleeve 14 in the shaft.Baffle ring 17 can by screw thread or It is fixedly connected using interference fit with shaft 11.

The rotor magnetic steel of the above-mentioned permanent magnet high-speed motor of the utility model is pre-tightened by the following method:

Firstly, magnet steel 13 to be mounted on to the outer surface of wedge-shaped tapered sleeve 14, and by 14 end flange 141 of wedge-shaped tapered sleeve Spacer pin 18 limits magnet steel 13 circumferentially；

Second, binding is carried out in 13 outer surface of magnet steel with carbon fiber and forms carbon fiber sleeve 15, for fixing magnet steel 13；

Third will install 14 sets of wedge-shaped tapered sleeve of magnet steel 13 on the conical section 12 of shaft 11, then in wedge-shaped tapered sleeve 14 oil filler point 143(technique oilhole) between wedge-shaped tapered sleeve 14 and shaft 11 inject hydraulic oil.

4th, after wedge-shaped 14 spreading of tapered sleeve, wedge-shaped tapered sleeve 14 is pushed away and is attached to position, then stopped injection high pressure oil, complete Installation and preload between wedge-shaped tapered sleeve and shaft.

Thus, it is possible to realize tensioner again to carbon fiber sleeve, carbon fiber sleeve pressing force ensure that；Prevent motor high speed from transporting Under turning, because of the too big generation centrifugation gap of centrifugal force and vibration, motor operation low noise ensure that.Vibration hidden danger is reduced, is mentioned significantly The high kinetic characteristics of motor；

Above embodiments are only demonstration explanation to be carried out to the utility model, rather than limit the protection scope of the application, this Field technical staff can carry out conventional modifications or substitutions on the basis of the above embodiments, such as: wedge-shaped tapered sleeve and shaft Between preload amount, change the taper of wedge-shaped tapered sleeve, but the protection scope of the application still should belong in these modifications or substitutions.

Claims (10)

1. a kind of permanent magnet high-speed motor comprising rotor, stator, base and end cap；The rotor is located on base by bearing, The stator is located at the periphery of rotor；The rotor includes shaft and the magnet steel that is located at outside shaft, and for fixing magnet steel Carbon fiber sleeve, it is characterised in that: it is in inner big outer small conical section that the shaft, which includes for magnet steel is arranged, in the cone A wedge-shaped tapered sleeve matching with taper hole and with conical section interference fit is provided with outside shape section, the magnet steel is set In the outer surface of wedge-shaped tapered sleeve, it is externally provided with carbon fiber sleeve in magnet steel, for fixing magnet steel；It is equipped with and prolongs on the wedge-shaped tapered sleeve Extend to the oil filler point of wedge-shaped tapered sleeve inner surface.

2. permanent magnet high-speed motor according to claim 1, it is characterised in that: the base include two be located at end be in The end plate of annulus plate-like；Inner water sleeve, outer water jacket are successively fixed with from inside to outside between two end plates, in the outer of the inner water sleeve Continued circling is equipped with waterway wall on the inner surface of surface or outer water jacket, and after the inner water sleeve and outer water jacket grafting, adjacent is described The water channel being looped around between inner water sleeve, outer water jacket is formed between waterway wall.

3. permanent magnet high-speed motor according to claim 2, it is characterised in that: between the two end plates of the base and position In outer water jacket, compartment of terrain is equipped with windband outside and therewith, is formed between the windband and the outer water jacket and two end plates closed Air duct is provided with wind item in the air duct, and between end plate, there are channels at the both ends of the wind item；The wind item be it is multiple and It is uniformly distributed along the circumference；The base both ends are equipped with two vents of connection base inner chamber body and air duct.

4. permanent magnet high-speed motor described in -3 any items according to claim 1, it is characterised in that: the shaft is located at magnet steel Front position be equipped with flabellum, the tail end center of shaft is equipped with the position in the cooling hole of blind hole shape before the flabellum Install the oblique air holes for leading to center cooling hole.

5. permanent magnet high-speed motor according to claim 1, which is characterized in that be equipped with method in the outer end of the wedge-shaped tapered sleeve Orchid, for the axial limiting of magnet steel, the flange is equipped with the spacer pin for limiting the magnet steel circumferential movement；In the shaft Outer end positioned at the wedge-shaped tapered sleeve is equipped with a baffle ring.

6. permanent magnet high-speed motor according to claim 1, which is characterized in that the wedge shape tapered sleeve inner surface and the oiling There is annular groove at the perforation of hole.

7. a kind of rotor magnetic steel fixed structure of permanent magnet high-speed motor comprising shaft, magnet steel, carbon fiber sleeve, feature exist In it is in inner big outer small conical section that the shaft, which includes for magnet steel is arranged, and one is provided with outside the conical section therewith Wedge-shaped tapered sleeve matched with taper hole and with conical section interference fit, the magnet steel are located at the appearance of wedge-shaped tapered sleeve Face is externally provided with carbon fiber sleeve in magnet steel, for fixing magnet steel；It is equipped on the wedge-shaped tapered sleeve and extends to table in wedge-shaped tapered sleeve The oil filler point in face.

8. the rotor magnetic steel fixed structure of permanent magnet high-speed motor according to claim 7, which is characterized in that the shaft The taper of conical section and wedge-shaped tapered sleeve inner surface are as follows: 1:50~1:150.

9. the rotor magnetic steel fixed structure of permanent magnet high-speed motor according to claim 7, which is characterized in that in the wedge shape The outer end of tapered sleeve is equipped with flange, and for the axial limiting of magnet steel, the flange is equipped with the limit for limiting the magnet steel circumferential movement Position pin；The outer end for being located at the wedge-shaped tapered sleeve in the shaft is equipped with a baffle ring.

10. the rotor magnetic steel fixed structure of permanent magnet high-speed motor according to claim 7, which is characterized in that the wedge shape There is annular groove at tapered sleeve inner surface and the oil filler point perforation.