CN211018560U - Rotor structure, motor and centrifuge with same - Google Patents

Abstract

The application provides a rotor structure, includes: the rotating shaft, the magnetic steel and the heat radiating piece; the magnetic steel and the heat dissipation piece are arranged along the axial direction of the rotating shaft; the magnetic steel and the heat radiating piece are arranged on the outer peripheral side of the rotating shaft; the heat dissipation piece is used for dissipating heat of the magnetic steel. According to the rotor structure of this application, the heat accessible heat sink conduction of magnet steel can effectually dispel the heat to the magnet steel to the outside when the high-speed rotation of motor.

Description

Rotor structure, motor and centrifuge with same

Technical Field

The application belongs to the technical field of centrifugal machines, concretely relates to rotor structure, motor and have its centrifugal machine.

Background

At present, the temperature rise of the motor is one of important indexes for measuring the performance of the motor, the temperature rise is in direct relation with the service life of the motor, the motor is easy to damage due to overhigh temperature rise, and particularly for a high-speed permanent magnet motor, high-frequency harmonic waves can generate larger eddy current loss on the surfaces of a rotor iron core and magnetic steel due to the characteristics of small size, high power density and the like, so that the magnetic steel is easy to demagnetize when the rotor runs at a higher temperature.

Therefore, how to provide a rotor structure capable of effectively cooling and radiating magnetic steel, a motor and a centrifuge with the rotor structure become problems to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a rotor structure, motor and have its centrifuge, can effectually cool off the heat dissipation to magnet steel.

In order to solve the above problem, the present application provides a rotor structure including: the rotating shaft, the magnetic steel and the heat radiating piece; the magnetic steel and the heat dissipation piece are arranged along the axial direction of the rotating shaft; the magnetic steel and the heat radiating piece are arranged on the outer peripheral side of the rotating shaft; the heat dissipation piece is used for dissipating heat of the magnetic steel.

Preferably, the number of the magnetic steels is at least two; at least two magnetic steels are arranged along the axial direction of the rotating shaft; the heat dissipation piece is arranged between two adjacent magnetic steels in the axial direction of the rotating shaft.

Preferably, the magnetic steel is annular magnetic steel, and the annular magnetic steel is sleeved outside the rotating shaft;

and/or the number of the magnetic steels is at least two, and the number of the heat dissipation pieces is at least three; the magnetic steel and the heat dissipation piece are arranged at intervals in the axial direction of the rotating shaft;

and/or the heat radiating piece is an annular heat radiating piece which is sleeved outside the rotating shaft;

and/or the material of the heat dissipation piece is a magnetic conductive material.

Preferably, every annular magnet steel all overlaps outward and is equipped with the protective sheath, protective sheath and annular magnet steel interference fit.

Preferably, the material of the protective sheath is a carbon fiber material.

Preferably, the material of the heat sink is 40CrNiMoA or SUS 430.

Preferably, the rotating shaft is provided with a first refrigerant circulating groove; the position of the first refrigerant circulation groove corresponds to the position of the magnetic steel.

Preferably, the first refrigerant circulating groove extends from the first end of the rotating shaft to the second end of the rotating shaft;

and/or the first refrigerant circulation grooves are arranged in a plurality of numbers, and the first refrigerant circulation grooves are circumferentially arranged around the central axis of the rotating shaft.

Preferably, the annular heat sink is provided with a second refrigerant circulation groove; the second refrigerant circulating groove is communicated with the first refrigerant circulating groove.

Preferably, the second refrigerant circulation groove is disposed on the first end surface and/or the second end surface of the annular heat sink;

and/or the second refrigerant circulation groove extends in a radial direction on the annular heat sink.

Preferably, the second refrigerant circulation grooves are arranged in a plurality, and the plurality of second refrigerant circulation grooves are circumferentially arranged around the central axis of the rotating shaft; the second refrigerant circulation grooves are communicated with the first refrigerant circulation grooves.

Preferably, the number of the first refrigerant circulating grooves is the same as that of the second refrigerant circulating grooves; and the first refrigerant circulation grooves are communicated with the second refrigerant circulation grooves in a one-to-one correspondence manner.

According to yet another aspect of the present application, there is provided an electric machine comprising a rotor structure as described above.

According to still another aspect of the present application, there is provided a centrifuge including a motor, the motor being the above-mentioned motor.

The application provides a rotor structure, motor and have its centrifuge, the heat accessible heat sink conduction of magnet steel to the outside when the motor is high-speed rotatory can effectually dispel the heat to the magnet steel.

Drawings

FIG. 1 is a schematic structural diagram of a rotor structure according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a heat sink according to an embodiment of the present application.

The reference numerals are represented as:

1. a rotating shaft; 11. a first refrigerant circulation groove; 2. magnetic steel; 3. a heat sink; 31. a second refrigerant circulation groove; 4. and (6) a protective sleeve.

Detailed Description

Referring collectively to fig. 1, in accordance with an embodiment of the present application, a rotor structure includes: the rotary shaft 1, the magnetic steel 2 and the heat sink 3; the magnetic steel 2 and the heat sink 3 are arranged along the axial direction of the rotating shaft 1; the magnetic steel 2 and the heat sink 3 are both arranged on the outer periphery of the rotating shaft 1; the heat dissipation part 3 is used for dissipating heat of the magnetic steel 2, and heat of the magnetic steel 2 can be conducted to the outside through the heat dissipation part 3 when the motor rotates at a high speed, so that the heat dissipation effect of the magnetic steel 2 is greatly improved.

Further, at least two magnetic steels 2 are arranged; at least two magnetic steels 2 are arranged along the axial direction of the rotating shaft 1; the heat dissipation piece 3 is arranged between the two adjacent magnetic steels 2 in the axial direction of the rotating shaft 1, and the heat dissipation piece 3 can dissipate the heat of the two adjacent magnetic steels 2, so that the heat dissipation effect of the magnetic steels 2 is enhanced.

Further, the magnetic steel 2 is annular magnetic steel which is sleeved outside the rotating shaft 1;

and/or the magnetic steels 2 are at least two, and the heat dissipation elements 3 are at least three; the magnetic steel 2 and the heat sink 3 are arranged at intervals in the axial direction of the rotating shaft 1;

and/or the heat sink 3 is an annular heat sink which is sleeved outside the rotating shaft 1;

and/or the material of the heat dissipation element 3 is a magnetic conductive material.

Furthermore, each annular magnetic steel is sleeved with a protective sleeve, the protective sleeve is in interference fit with the annular magnetic steel, and the protective sleeve and the magnetic steel 2 are in interference fit to apply certain pre-pressure to the magnetic steel 2 so as to offset the tensile stress generated by the centrifugal force when the magnetic steel 2 rotates at a high speed, so that the magnetic steel 2 rotor can be prevented from being damaged by the huge centrifugal force generated when the magnetic steel 2 rotor rotates at a high speed.

Furthermore, the protective sleeve is made of carbon fiber materials, the carbon fibers have high tensile strength, and the carbon fiber protective sleeve can pre-compress and protect the magnetic steel 2 to prevent the magnetic steel 2 from being damaged due to overlarge centrifugal force during high-speed rotation.

Further, the heat dissipation member 3 is made of 40CrNiMoA or SUS430, and the material has good heat conduction performance, so that the heat of the magnetic steel 2 can be conducted to the outside through the heat dissipation member 3 when the motor rotates at a high speed, and the heat dissipation effect of the magnetic steel 2 is greatly improved.

Referring to fig. 2 in combination, the present application also discloses some embodiments, a first refrigerant circulation groove 11 is formed on the rotating shaft 1; the position of the first refrigerant circulation groove 11 corresponds to the position of the magnetic steel 2, and the refrigerant can circulate through the first refrigerant circulation groove 11 and cool the magnetic steel 2 in the circulation process.

Further, the first refrigerant circulation groove 11 extends from the first end of the rotating shaft 1 to the second end of the rotating shaft 1;

and/or, the first refrigerant circulation grooves 11 are provided in a plurality of numbers, the first refrigerant circulation grooves 11 are circumferentially arranged around the central axis of the rotating shaft 1, and the refrigerant enters the motor through the motor casing, and has a certain pressure, so that the refrigerant can enter the first refrigerant circulation grooves 11 after entering the motor, and then flows into the second refrigerant circulation grooves 31, and freely flows in the second refrigerant circulation grooves 31, and then cools the magnetic steel 2.

Further, a second refrigerant circulation groove 31 is formed in the annular heat sink; the second refrigerant circulation groove 31 communicates with the first refrigerant circulation groove 11.

Further, the second refrigerant circulation groove 31 is disposed on the first end surface and/or the second end surface of the annular heat sink, and the refrigerant can freely circulate between the annular heat sink and the magnetic steel 2, so that the magnetic steel 2 can be directly cooled, and demagnetization of the magnetic steel 2 due to high temperature can be avoided to the maximum extent.

And/or the second refrigerant circulation groove 31 extends in a radial direction on the annular heat sink.

Further, a plurality of second refrigerant circulation grooves 31 are provided, and the plurality of second refrigerant circulation grooves 31 are circumferentially provided around the central axis of the rotating shaft 1; the plurality of second refrigerant circulation grooves 31 are all communicated with the first refrigerant circulation groove 11.

Further, the number of the first refrigerant circulation grooves 11 is the same as that of the second refrigerant circulation grooves 31; and first refrigerant circulation grooves 11 communicate with second refrigerant circulation grooves 31 one-to-one, the refrigerant can enter into a plurality of second refrigerant circulation grooves 31 through a plurality of first refrigerant circulation grooves 11, and the refrigerant cools the magnet steel 2 on the flow path in the process of flowing to the second refrigerant circulation grooves 31, and the plurality of first refrigerant circulation grooves 11 and the second refrigerant circulation grooves 31 which are circumferentially arranged can cool the magnet steel 2 from a plurality of positions, so that the cooling effect is better.

Further, the annular heat dissipation member is in interference fit with the rotating shaft 1; the magnetic steel 2 is in clearance fit with the rotating shaft 1; the magnetic steel 2 is bonded with the rotating shaft 1 through magnetic steel glue.

Furthermore, the two end faces of the annular heat dissipation part are respectively attached to the end faces of the two adjacent annular magnetic steels, so that the strength of the rotor structure can be effectively enhanced, and the magnetic steel 2 is prevented from being cracked easily due to insufficient strength.

When this application assembles, at first install annular heat dissipation piece, install annular magnet steel again, install annular heat dissipation piece again, like this interval installation magnet steel 2 and heat dissipation piece 3 in proper order, accomplish all annular heat dissipation pieces and the assembly of magnet steel 2, then at every section magnet steel 2 surface winding carbon fiber for whole rotor forms a complete whole, and the structure is more firm.

According to an embodiment of the application, an electric machine comprises a rotor structure, and the rotor structure is the rotor structure.

According to an embodiment of the application, the centrifuge comprises a motor, and the motor is the motor. The centrifugal machine is a 100KW military magnetic suspension centrifugal machine.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (14)

1. A rotor structure, comprising: the rotary shaft (1), the magnetic steel (2) and the heat sink (3); the magnetic steel (2) and the heat dissipation piece (3) are arranged along the axial direction of the rotating shaft (1); the magnetic steel (2) and the heat dissipation piece (3) are arranged on the outer periphery of the rotating shaft (1); the heat dissipation piece (3) is used for dissipating heat of the magnetic steel (2).

2. Rotor structure according to claim 1, characterised in that said magnetic steels (2) are provided in at least two; at least two magnetic steels (2) are arranged along the axial direction of the rotating shaft (1); the heat dissipation piece (3) is arranged between the two adjacent magnetic steels (2) in the axial direction of the rotating shaft (1).

3. The rotor structure according to claim 1, wherein the magnetic steel (2) is an annular magnetic steel, and the annular magnetic steel is sleeved outside the rotating shaft (1);

and/or the number of the magnetic steels (2) is at least two, and the number of the heat dissipation elements (3) is at least three; the magnetic steel (2) and the heat dissipation piece (3) are arranged at intervals in the axial direction of the rotating shaft (1);

and/or the heat dissipation piece (3) is an annular heat dissipation piece which is sleeved outside the rotating shaft (1);

and/or the heat dissipation member (3) is made of a magnetic conductive material.

4. The rotor structure of claim 3, wherein each annular magnetic steel is sleeved with a protective sleeve, and the protective sleeve is in interference fit with the annular magnetic steel.

5. A rotor structure according to claim 4, wherein the material of the protective sheath is a carbon fibre material.

6. A rotor structure according to claim 3, characterised in that the material of the heat sink (3) is 40CrNiMoA or SUS 430.

7. The rotor structure according to claim 3, characterized in that the rotating shaft (1) is provided with a first refrigerant circulation groove (11); the position of the first refrigerant circulation groove (11) corresponds to the position of the magnetic steel (2).

8. The rotor structure according to claim 7, characterized in that the first refrigerant circulation groove (11) extends from a first end of the rotating shaft (1) to a second end of the rotating shaft (1);

and/or the first refrigerant circulation grooves (11) are arranged in a plurality, and the first refrigerant circulation grooves (11) are circumferentially arranged around the central axis of the rotating shaft (1).

9. The rotor structure according to claim 8, characterized in that the annular heat sink is provided with a second refrigerant circulation groove (31); the second refrigerant circulation groove (31) is communicated with the first refrigerant circulation groove (11).

10. The rotor structure according to claim 9, characterized in that said second refrigerant circulation groove (31) is provided on the first end face and/or the second end face of said annular heat sink;

and/or the second refrigerant circulation groove (31) extends in the radial direction on the annular heat sink.

11. The rotor structure according to claim 10, wherein the second refrigerant circulation groove (31) is provided in plurality, and the plurality of second refrigerant circulation grooves (31) are circumferentially provided around a central axis of the rotating shaft (1); the plurality of second refrigerant circulation grooves (31) are all communicated with the first refrigerant circulation groove (11).

12. The rotor structure according to claim 11, characterized in that the number of the first refrigerant circulation grooves (11) and the second refrigerant circulation grooves (31) is the same; and the first refrigerant circulation grooves (11) and the second refrigerant circulation grooves (31) are communicated in a one-to-one correspondence manner.

13. An electrical machine comprising a rotor structure, the rotor structure being as claimed in any one of claims 1 to 12.

14. A centrifuge comprising a motor, said motor being the motor of claim 13.

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