CN218733595U

CN218733595U - Motor rotor system and motor

Info

Publication number: CN218733595U
Application number: CN202222552492.8U
Authority: CN
Inventors: 杨迅雷; 邹莹; 曹根; 罗碧; 毛建勇; 朱杰; 邓群
Original assignee: Hunan Chongde Technology Co ltd
Current assignee: Hunan Chongde Technology Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-03-24
Anticipated expiration: 2032-09-26

Abstract

The utility model provides an electric motor rotor system and motor. The motor rotor system comprises a rotating shaft, a supporting bearing, a bearing cooling cavity and a rotating shaft cooling assembly, wherein the rotating shaft cooling assembly comprises a cooling channel for conveying cooling liquid to the inside of the rotating shaft, a liquid inlet part for conveying the cooling liquid to the cooling channel and a liquid discharging part for discharging the heated cooling liquid, and the cooling channel is arranged along the axial direction of the rotating shaft; the liquid inlet component and the liquid discharge component are respectively arranged at two ends of the cooling channel, and the liquid discharge end of the liquid discharge component is communicated with the bearing cooling cavity on the corresponding side. The motor comprises a stator component and the motor rotor system, wherein the stator component is sleeved outside the motor rotor system. The utility model has the advantages of good heat dissipation effect, compact structure, low cost and the like.

Description

Motor rotor system and motor

Technical Field

The utility model relates to an electrical equipment field especially relates to an electric motor rotor system and motor.

Background

Because the high-speed motor has high operation speed, in order to make the structure more compact, the motor rotor usually adopts a permanent magnet rotor. In the operation process, the fundamental frequency of the high-speed motor is several times or even dozens of times of that of a common motor, and the high-frequency harmonic wave can cause the permanent magnet rotor to generate great heat due to the eddy current effect, which is a technical problem faced by the current high-speed motor. Specifically speaking:

the high-speed motor is characterized in that the rotor is slender, the permanent magnet is usually in a surface-mounted structure, and the permanent magnet is directly adhered to the rotating shaft through high-temperature-resistant adhesive. The permanent magnet is subjected to a large centrifugal force when rotating at a high speed, and the permanent magnet itself has a low tensile strength and hardly withstands the centrifugal force at a high rotation speed, so that the permanent magnet is easily broken. In order to solve the above problems, carbon fiber is usually wound on the surface of the permanent magnet or an alloy steel sleeve is usually sleeved on the surface of the permanent magnet. The carbon fiber is high in strength and poor in heat conducting performance, at the moment, heat generated by the permanent magnet cannot be dissipated through the carbon fiber, the temperature of the rotating shaft and the temperature of the permanent magnet are too high, and the rotor is prone to damage. When the alloy steel sleeve is adopted, the heat transfer effect of the rotating shaft is good, but the eddy current loss of the rotating shaft is increased sharply, so that more heat is generated, the efficiency of the motor is reduced, and the permanent magnet can be demagnetized due to high temperature generated by the eddy current effect. Therefore, the rotating shaft of the motor usually adopts a way of winding a carbon fiber sleeve to protect the permanent magnet, and the cooling of the rotating shaft becomes an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, it is good to provide a radiating effect, and compact structure, with low costs electric motor rotor system and motor.

In order to solve the technical problem, the utility model provides a technical scheme does:

a motor rotor system comprises a rotating shaft, supporting bearings supported at the end parts of two sides of the rotating shaft, a bearing cooling cavity arranged at the position corresponding to the supporting bearings, and a rotating shaft cooling assembly, wherein the rotating shaft cooling assembly comprises a cooling channel for conveying cooling liquid to the inside of the rotating shaft, a liquid inlet part for conveying the cooling liquid to the cooling channel, and a liquid discharging part for discharging the warmed cooling liquid, and the cooling channel is arranged along the axial direction of the rotating shaft; the liquid inlet part and the liquid discharging part are respectively arranged at two ends of the cooling channel, and the liquid discharging end of the liquid discharging part is communicated with the bearing cooling cavity on the corresponding side.

As a further improvement of the above technical solution:

the liquid inlet component comprises a liquid inlet cover plate arranged on the outer side of the end part of the rotating shaft and a liquid inlet sealing ring sleeved outside the rotating shaft, wherein a liquid conveying pipe is arranged on the liquid inlet cover plate, one end of the liquid conveying pipe is positioned in the cooling channel, and a rotating gap for ensuring the rotation of the rotating shaft is reserved between the liquid conveying pipe and the cooling channel; the feed liquor sealing ring with be formed with between the feed liquor apron and prevent that the coolant liquid from flowing out to the backward flow cavity of bearing cooling cavity through running clearance.

The liquid inlet cover plate and the liquid inlet sealing ring are arranged on the bearing seats on the corresponding sides; a first sealing channel for blocking cooling liquid is arranged between the liquid inlet cover plate and the rotating shaft.

And the liquid inlet end of the liquid inlet part is communicated with an external cooling source of the bearing cooling cavity.

The liquid drainage part comprises a plurality of liquid drainage channels which are arranged along the circumferential direction of the rotating shaft at intervals, and two ends of each liquid drainage channel are respectively communicated with the cooling channel and the corresponding bearing cooling cavity.

The cooling channel is arranged along the axial direction of the rotating shaft in a penetrating mode, and a blocking head is arranged at one end, close to the liquid drainage component, of the cooling channel.

One end of the rotating shaft, which is positioned at the liquid inlet component, is provided with a bearing sealing sleeve, and the bearing sealing sleeve and the liquid inlet sealing ring are respectively arranged at two sides of the supporting bearing; and one end of the rotating shaft, which is positioned on the liquid discharge part, is provided with two bearing sealing sleeves which are respectively arranged on two sides of the supporting bearing.

The bearing sealing sleeve is fixed on the rotating shaft, a bearing seat is arranged outside the bearing sealing sleeve, and a second sealing channel for blocking cooling liquid is reserved between the bearing seat and the bearing sealing sleeve.

A motor comprises a stator component and a motor rotor system, wherein the stator component is sleeved outside the motor rotor system.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses set up pivot cooling unit, pivot cooling unit is including the feed liquor part, cooling channel and the flowing back part that communicate in proper order, and cooling channel arranges along the axial of pivot, and the flowing back end of flowing back part communicates with the bearing cooling cavity that corresponds the side, and its structural configuration is compact, need not to occupy unnecessary space. Meanwhile, the cooling channel can rapidly and directly cool and radiate the rotating shaft, and can also rapidly cool and radiate the permanent magnet attached to the rotating shaft, so that the cooling efficiency is high, and the radiating effect is good; the liquid discharge end of the liquid discharge part is communicated with the bearing cooling cavity on the corresponding side, so that the heated cooling liquid can be directly discharged through the original structure, a liquid discharge system does not need to be arranged independently, the cost is greatly reduced, and the structure is compact.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of a portion a of fig. 1.

Fig. 3 is a sectional view of section B-B of fig. 1.

The reference numerals in the figures denote:

1. a rotating shaft; 2. a support bearing; 3. a bearing cooling cavity; 4. a rotating shaft cooling assembly; 41. a cooling channel; 42. a liquid inlet part; 421. a liquid inlet cover plate; 422. liquid inlet sealing rings; 423. a transfusion tube; 424. a rotational clearance; 425. a reflux cavity; 43. a liquid discharge member; 431. a liquid discharge channel; 5. a bearing seat; 6. a bearing seal cartridge; 7. plugging a plug; 8. a stator assembly.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples, but the scope of the invention is not limited thereto.

As shown in fig. 1, the rotor system of the motor of the present embodiment includes a rotating shaft 1, a support bearing 2, and a bearing cooling cavity 3. Wherein, the support bearing 2 is supported at the two side ends of the rotating shaft 1; the bearing cooling cavity 3 is arranged at the corresponding position of the support bearing 2. In this embodiment, the motor rotor system further includes a rotating shaft cooling assembly 4, where the rotating shaft cooling assembly 4 includes a cooling channel 41, a liquid inlet component 42, and a liquid outlet component 43, where the cooling channel 41 is arranged along an axial direction of the rotating shaft 1 to convey a cooling liquid to an inside of the rotating shaft 1; the liquid inlet part 42 and the liquid discharging part 43 are respectively arranged at two ends of the cooling channel 41, the liquid inlet part 42 conveys the cooling liquid to the cooling channel 41, and the liquid discharging part 43 discharges the heated cooling liquid; the liquid discharge end of the liquid discharge part 43 is communicated with the bearing cooling cavity 3 on the corresponding side. The structure layout is compact, and no extra space is occupied.

Meanwhile, the cooling channel 41 can rapidly and directly cool and dissipate the rotating shaft 1, and can also rapidly cool and dissipate the permanent magnet attached to the rotating shaft 1, so that the cooling efficiency is high, and the heat dissipation effect is good; the liquid discharging end of the liquid discharging part 43 is communicated with the bearing cooling cavity 3 on the corresponding side, so that the heated cooling liquid can be directly discharged through the original bearing cooling cavity 3, a liquid discharging system does not need to be arranged independently, the cost is greatly reduced, and the structure is compact.

Further, as shown in fig. 2, the liquid inlet part 42 includes a liquid inlet cover 421 and a liquid inlet seal ring 422. Wherein, the liquid inlet cover plate 421 is arranged outside the end of the rotating shaft 1, and the liquid inlet cover plate 421 is arranged perpendicular to the cooling channel 41; the liquid inlet cover plate 421 is provided with a liquid conveying pipe 423, one end of the liquid conveying pipe 423 is located in the cooling channel 41, and a rotation gap 424 is left between one end of the liquid conveying pipe 423 and the cooling channel 41, so that the effective rotation of the rotating shaft 1 is ensured while the cooling liquid is effectively conveyed to the cooling channel 41. Outside the pivot 1 was located to the feed liquor sealing ring 422 cover, and be formed with backward flow cavity 425 between feed liquor sealing ring 422 and the feed liquor apron 421 to prevent effectively that the coolant liquid from flowing out to bearing cooling cavity 3 through rotating gap 424, guarantee that the coolant liquid can effectively flow back to in the cooling channel 41, realize the effective cooling of pivot 1 and permanent magnet after getting into backward flow cavity 425 through rotating gap 424.

As shown in fig. 1, the rotor system of the electric machine further comprises a bearing housing 5. The bearing seat 5 is arranged outside the support bearing 2, the liquid inlet cover plate 421 and the liquid inlet sealing ring 422 are arranged on the bearing seat 5 on the corresponding side, and the layout structure is simple and compact. Meanwhile, a first sealing channel is arranged between the liquid inlet cover plate 421 and the rotating shaft 1, and a blocking channel is formed by the first sealing channel, so that the blocking channel plays a role in blocking the cooling liquid.

In this embodiment, the liquid inlet cover plate 421 is connected to the bearing seat 5 by a fastener, and the liquid inlet sealing ring 422 is welded and fixed to the bearing seat 5. In other embodiments, the connection form as long as the reliable installation of the liquid inlet cover plate 421 and the liquid inlet sealing ring 422 can be realized is also within the protection scope of the present invention.

Further, the liquid inlet end of the liquid inlet part 42 is communicated with an external cooling source of the bearing cooling cavity 3. The cooling liquid of the rotating shaft 1 and the cooling liquid of the supporting bearing 2 share the same cooling source, the cooling source does not need to be arranged independently, the cost is greatly reduced, and the structure is simple and the layout is compact.

As shown in fig. 3, the liquid discharge part 43 includes four liquid discharge channels 431, the four liquid discharge channels 431 are uniformly arranged along the circumferential direction of the rotating shaft 1, and two ends of each liquid discharge channel 431 are respectively communicated with the cooling channel 41 and the corresponding bearing cooling cavity 3, so that the heated cooling liquid can be directly discharged through the bearing cooling cavity 3, a liquid discharge system does not need to be separately arranged, the cost is greatly reduced, and the structure is compact. In other embodiments, the number and the spacing of the liquid discharge channels 431 can be adjusted according to practical situations, such as three, five, etc.

Preferably, the cooling channel 41 is arranged to penetrate in the axial direction of the rotating shaft 1, and one end of the cooling channel 41 close to the drainage component 43 is provided with a blocking head 7. The through arrangement mode enables the rotating shaft 1 to be larger in heat dissipation area and better in heat dissipation effect.

Further, as shown in fig. 1, one end of the rotating shaft 1, which is located at the liquid inlet part 42, is provided with a bearing seal sleeve 6; bearing seal cover 6 and feed liquor sealing ring 422 divide and locate the both sides of support bearing 2, and bearing seal cover 6, feed liquor sealing ring 422, bearing frame 5 and pivot 1 enclose to close and form one of them bearing cooling cavity 3. One end of the rotating shaft 1, which is positioned at the liquid discharge part 43, is provided with two bearing sealing sleeves 6, the two bearing sealing sleeves 6 are respectively arranged at two sides of the supporting bearing 2, and the two bearing sealing sleeves 6, the bearing seat 5 and the rotating shaft 1 are enclosed to form another bearing cooling cavity 3. The sealing cavity for lubricating and cooling the support bearing 2 is formed, and the structure layout is compact and the occupied space is small.

More closely, the bearing seal cartridge 6 is fixed on the spindle 1, the bearing seal cartridge 6 rotates with spindle 1; a second sealing channel is left between the bearing seat 5 and the bearing sealing sleeve 6, and the second sealing channel is arranged to form a blocking channel which plays a role of blocking the cooling liquid.

Fig. 1 shows a motor of this embodiment, which includes a stator assembly 8 and the motor rotor system described above, where the stator assembly 8 is sleeved outside the motor rotor system. The utility model discloses a motor has motor rotor system's above-mentioned advantage equally.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not intended to be limited to the particular embodiments disclosed herein, but rather to include all embodiments falling within the scope of the appended claims.

Claims

1. A motor rotor system comprises a rotating shaft, supporting bearings supported at the end parts of two sides of the rotating shaft, and a bearing cooling cavity arranged at the position corresponding to the supporting bearings, and is characterized by further comprising a rotating shaft cooling assembly, wherein the rotating shaft cooling assembly comprises a cooling channel for conveying cooling liquid to the inside of the rotating shaft, a liquid inlet part for conveying the cooling liquid to the cooling channel, and a liquid discharging part for discharging the warmed cooling liquid, and the cooling channel is arranged along the axial direction of the rotating shaft; the liquid inlet part and the liquid discharging part are respectively arranged at two ends of the cooling channel, and the liquid discharging end of the liquid discharging part is communicated with the bearing cooling cavity on the corresponding side.

2. The motor rotor system according to claim 1, wherein the liquid inlet component comprises a liquid inlet cover plate arranged outside the end part of the rotating shaft and a liquid inlet sealing ring sleeved outside the rotating shaft, wherein the liquid inlet cover plate is provided with a liquid conveying pipe, one end of the liquid conveying pipe is positioned in the cooling channel, and a rotating gap for ensuring the rotation of the rotating shaft is reserved between the liquid conveying pipe and the cooling channel; the feed liquor sealing ring with be formed with between the feed liquor apron and prevent that the coolant liquid from flowing out to the backward flow cavity of bearing cooling cavity through running clearance.

3. The electric motor rotor system of claim 2, further comprising a bearing seat disposed outside the support bearing, wherein the liquid inlet cover plate and the liquid inlet seal ring are mounted on the bearing seat on the corresponding side; a first sealing channel for blocking cooling liquid is arranged between the liquid inlet cover plate and the rotating shaft.

4. The electric machine rotor system of any one of claims 1 to 3, wherein a liquid inlet end of the liquid inlet part is in communication with a source of cooling external to the bearing cooling cavity.

5. The electric machine rotor system according to any one of claims 1 to 3, wherein the drainage member comprises a plurality of drainage channels arranged at intervals along the circumferential direction of the rotating shaft, and two ends of each drainage channel are respectively communicated with the cooling channel and the corresponding bearing cooling cavity.

6. The electric machine rotor system according to any one of claims 1 to 3, wherein the cooling channel is arranged to penetrate along the axial direction of the rotating shaft, and one end of the cooling channel, which is close to the liquid drainage component, is provided with a blocking head.

7. The electric motor rotor system as claimed in claim 2 or 3, wherein a bearing sealing sleeve is arranged at one end of the rotating shaft, which is positioned at the liquid inlet part, and the bearing sealing sleeve and the liquid inlet sealing ring are respectively arranged at two sides of the supporting bearing; and one end of the rotating shaft, which is positioned on the liquid discharge part, is provided with two bearing sealing sleeves which are respectively arranged on two sides of the supporting bearing.

8. The electric machine rotor system of claim 7, wherein the bearing gland is fixed to the shaft, a bearing seat is provided outside the bearing gland, and a second sealing channel for blocking coolant is left between the bearing seat and the bearing gland.

9. An electric machine comprising a stator assembly, characterized by comprising an electric machine rotor system according to any one of claims 1 to 8, said stator assembly being nested outside said electric machine rotor system.