CN110198092A - Heat conduction oil cooling device and flywheel energy storage motor in rotor hollow shaft - Google Patents

Abstract

The invention discloses a heat conduction oil cooling device in a hollow shaft of a motor rotor and a flywheel energy storage motor, wherein the cooling device includes a motor mandrel, a sealed oil tank, an oil delivery pipe and an electric drive oil pump, and the motor mandrel defines a hollow shaft extending along the axial direction. The lower end of the hollow cavity is an open end and the upper end is a closed end; the sealed oil tank is located at the lower end of the motor mandrel, and the sealed oil tank is connected to the lower end of the motor mandrel by suspension and sealing; the oil delivery pipe is arranged in the hollow cavity, and the lower end of the oil delivery pipe extends into the oil chamber The middle and the upper end extend into the upper part of the hollow cavity; the upper end of the oil delivery pipe is connected with a fuel injection pipe with a nozzle. The tangential speed of fuel injection at the nozzle is the same as the tangential speed of the inner wall rotation of the hollow cavity; the electric drive oil pump drives the oil in the sealed oil tank to be sprayed out from the nozzle through the oil delivery pipe and the fuel injection pipe in sequence. The cooling device can effectively cool the motor mandrel, prevent the motor rotor from overheating, and prolong the service life of the energy storage motor.

Description

Heat conduction oil cooling device in hollow shaft of motor rotor and flywheel energy storage motor

technical field

The invention relates to the technical field of a motor rotor cooling device for a flywheel energy storage system, in particular to a heat transfer oil cooling device in a hollow shaft of a motor rotor and a flywheel energy storage motor.

Background technique

Flywheel energy storage is an advanced physical energy storage technology with high power density, rapid response, long life, and friendly environmental characteristics. In order to improve the energy storage density and power density, the flywheel usually operates at a very high speed (over 10,000rpm). The motor has a high power density and a high calorific value, and the heat is not easy to dissipate in a vacuum environment.

A large amount of heat on the motor is not dissipated, which will directly affect the operation of the flywheel energy storage device, and will also reduce the service life and energy efficiency of the motor. Severe heat will cause damage to the motor. The motor of the flywheel energy storage system is in a vacuum environment, and only the motor stator is directly connected to the casing. The heat of the motor stator can be dissipated through the passive cooling device on the casing, while the heat of the motor rotor is difficult to discharge. The permanent magnet motor rotor usually puts the permanent magnet On the rotor, the heat dissipation of the motor rotor is more important, because the heat-resistant temperature of the motor rotor magnetic steel usually does not exceed 180 degrees.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a heat transfer oil cooling device in the hollow shaft of the motor rotor, which can effectively cool the motor shaft and prolong the life of the energy storage motor.

According to the embodiment of the first aspect of the present invention, the heat transfer oil cooling device in the hollow shaft of the motor rotor includes:

a motor mandrel, the motor mandrel defines a hollow cavity extending in the axial direction, the lower end of the hollow cavity is an open end and the upper end is a closed end;

A sealed oil tank, the sealed oil tank has an oil chamber, the sealed oil tank is located at the lower end of the motor mandrel, the sealed oil tank is connected to the lower end of the motor mandrel in a floating seal, and the oil chamber passes through the open The end communicates with the hollow cavity;

An oil delivery pipe, the oil delivery pipe is arranged in the oil chamber and the hollow cavity, the lower end of the oil delivery pipe extends into the oil chamber, the upper end of the oil delivery pipe extends into the hollow cavity and is close to the closed end; the upper end of the oil delivery pipe is connected with a fuel injection pipe with a nozzle. When the fuel injection pipe injects oil, the oil ejected from the nozzle is ejected in a tangential direction to the rotation direction of the inner wall of the hollow cavity, and the The fuel injection tangential velocity of the nozzle is the same as the tangential velocity of the inner wall rotation of the hollow cavity;

An electric drive oil pump, the electric drive oil pump is arranged in the oil chamber and connected to the lower end of the oil delivery pipe, so that the oil in the oil chamber passes through the oil delivery pipe and the oil injection pipe in sequence from The spout ejects.

According to the heat conduction oil cooling device in the motor rotor hollow shaft of the embodiment of the first aspect of the present invention, the oil in the sealed oil tank is delivered to the upper part of the hollow cavity of the motor mandrel by using the electric drive oil pump, the oil delivery pipe and the oil injection pipe. The tangential velocity of the oil injection at the nozzle is the same as the tangential velocity of the inner wall rotation of the hollow cavity, so that the oil at the nozzle and the rotating inner wall of the hollow cavity remain relatively stationary in the tangential direction, and the oil adheres to the inner wall of the hollow cavity without shearing , to prevent the oil from splashing, and eliminate the shearing circulation and heat generated by the oil in the cylindrical gap between the inner wall of the hollow cavity of the motor shaft and the outer peripheral surface of the oil delivery pipe when the oil is sprayed axially, so that the oil can flow from the motor shaft The upper part of the inner wall of the hollow cavity slides naturally along the inner wall of the hollow cavity and falls into the sealed oil tank. The heat on the motor shaft can be taken away by using the cooling medium oil, and then the heat is dissipated externally through the shell of the sealed oil tank. Under the action of the electric drive oil pump, the oil can be continuously circulated, which can effectively cool the motor shaft, prevent the motor rotor temperature from exceeding the design limit, and prolong the life of the flywheel energy storage motor.

According to an embodiment of the first aspect of the present invention, it further includes a heat exchange tube, the heat exchange tube is axially nested in the hollow cavity with an interference fit, and the inner wall of the heat exchange tube is spaced apart in the circumferential direction. There are a plurality of fins, and each fin extends along the axial direction; the oil delivery pipe axially passes through the heat exchange tube, and the upper end of the oil delivery pipe is higher than the heat exchange tube.

According to a further embodiment of the first aspect of the present invention, the lower end of the heat exchange tube is flush with the open end of the hollow cavity, and the upper end of the heat exchange tube is arranged with the closed end of the hollow cavity. The fuel injection pipe is located between the upper end of the heat exchange pipe and the closed end of the hollow cavity.

According to a further embodiment of the first aspect of the present invention, the radial cross-section of each of the fins is wedge-shaped, and two adjacent fins form an axially penetrating groove with the inner wall of the heat exchange tube.

According to an embodiment of the first aspect of the present invention, there are multiple fuel injection pipes, and the multiple fuel injection pipes are distributed circumferentially at intervals on the upper end of the oil delivery pipe.

According to an embodiment of the first aspect of the present invention, the top of the sealed oil tank is provided with an installation opening, the lower end of the motor mandrel is installed in the installation opening, the circumferential wall of the installation opening and the motor mandrel A spiral groove sealing structure is formed on the outer peripheral surface of the lower end of the motor shaft, so that the sealed oil tank is connected to the lower end of the motor mandrel in a floating and sealed manner.

According to an embodiment of the first aspect of the present invention, the electric drive oil pump has a suction port facing the bottom of the oil chamber.

According to an embodiment of the first aspect of the present invention, an oil tank radiator is provided on the outer peripheral surface of the sealed oil tank.

According to the second embodiment of the present invention, the flywheel energy storage motor includes:

The heat transfer oil cooling device in the hollow shaft of the motor rotor according to any one embodiment of the first aspect of the present invention;

a casing, the casing is formed with a casing cavity, the bottom of the casing is in sealing connection with the outer peripheral surface of the sealed oil tank, and the motor mandrel is located in the casing cavity;

a motor stator, the motor stator is located in the casing cavity, and the motor stator is fixed to the inner wall of the casing;

A motor rotor, the motor rotor is arranged coaxially with the motor stator, the motor rotor is sleeved on the outer peripheral surface of the motor mandrel, and the motor rotor and the motor mandrel are relatively opposite to the motor stator Can rotate synchronously;

A flywheel rotor, the flywheel rotor is located in the casing, and the flywheel rotor is coaxially arranged on the top of the motor shaft.

According to an embodiment of the second aspect of the present invention, a housing cooling element is provided on the housing at a position corresponding to the motor stator.

According to an embodiment of the second aspect of the present invention, it also includes an upper radial electromagnetic bearing and a lower radial electromagnetic bearing, and the upper radial electromagnetic bearing and the lower radial electromagnetic bearing are installed through the first mounting part and the second mounting part respectively. The parts are fixed on the housing, and the upper radial electromagnetic bearing and the lower radial electromagnetic bearing are correspondingly suspended and supported on the upper radial suspension journal surface and the lower radial suspension journal surface of the motor mandrel. , realizing the non-contact radial suspension of the motor mandrel.

According to an embodiment of the second aspect of the present invention, it also includes an upper thrust disk, a lower thrust disk, an upper thrust bearing stator, and a lower thrust bearing stator; the upper thrust disk and the lower thrust disk are correspondingly fixed on the flywheel rotor On the upper and lower outer peripheral surfaces of the flywheel rotor core shaft, the upper thrust bearing stator is located above the upper thrust disk and fixed on the housing through a third mounting piece, and the lower thrust bearing stator is located on The lower part of the lower thrust plate is fixed on the casing through the first mounting part, so as to realize the non-contact axial suspension of the flywheel rotor core shaft.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural diagram of an energy storage motor according to an embodiment of the second aspect of the present invention, which schematically shows a heat transfer oil cooling device in the hollow shaft of the motor rotor according to the embodiment of the first aspect of the present invention.

Fig. 2 is a schematic diagram of the arrangement of oil injection pipes in the heat transfer oil cooling device in the hollow shaft of the motor rotor according to the embodiment of the first aspect of the present invention.

Fig. 3 is a structural schematic diagram of the molecular pump in the heat transfer oil cooling device in the hollow shaft of the motor rotor according to the embodiment of the first aspect of the present invention.

Reference signs:

Heat conduction oil cooling device in hollow shaft of motor rotor 1000

Motor mandrel 1 Hollow cavity 101 Open end 102 Closed end 103

Sealed oil tank 2 Mounting port 201 Spiral groove 202 Oil tank radiator 203

Oil delivery pipe 3 Fuel injection pipe 4 Electric drive oil pump 5 Suction port 501

Heat exchange tube 6 Fin 601

Energy storage motor 2000

Shell 7 Electric shell radiator 701

Motor stator 8 Motor rotor 9 Flywheel rotor 10

Upper radial electromagnetic bearing 11 Lower radial electromagnetic bearing 12

Upper thrust plate 13 Lower thrust plate 14

Upper thrust bearing stator 15 Lower thrust bearing stator 16

First mounting part 17 Second mounting part 18 Third mounting part 19

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Referring to FIG. 1 to FIG. 3 , a heat transfer oil cooling device 1000 in a hollow shaft of a motor rotor according to an embodiment of the first aspect of the present invention will be described below.

As shown in Fig. 1 and Fig. 2, the heat conduction oil cooling device 1000 in the hollow shaft of the motor rotor according to the embodiment of the first aspect of the present invention includes a motor mandrel 1, a sealed oil tank 2, an oil delivery pipe 3 and an electric drive oil pump 5. Wherein, the motor mandrel 1 defines a hollow cavity 101 extending in the axial direction, the lower end of the hollow cavity 101 is an open end 102 and the upper end is a closed end 103; the sealed oil tank 2 has an oil chamber, and the sealed oil tank 2 is located on the motor mandrel 1 The lower end of the sealed oil tank 2 is suspended and sealed with the lower end of the motor shaft 1 and the oil chamber communicates with the hollow cavity 101 through the open end 102; the oil delivery pipe 3 is arranged in the oil chamber and the hollow cavity 101, and the lower end of the oil delivery pipe 3 extends into the oil In the chamber, the upper end of the oil delivery pipe 3 extends into the hollow cavity 101 and is close to the closed end 103; the upper end of the oil delivery pipe 3 is connected with a fuel injection pipe 4 with a nozzle. The tangential direction of the rotation direction of the inner wall of 101 is sprayed out, and the tangential velocity of the nozzle oil injection is the same as the tangential velocity of the inner wall rotation of the hollow cavity 101; the electric drive oil pump 5 is arranged in the oil chamber and connected with the lower end of the oil delivery pipe 3 to The oil in the oil chamber is sprayed out from the nozzle through the oil delivery pipe 3 and the oil injection pipe 4 in sequence.

Specifically, the motor mandrel 1 defines a hollow cavity 101 extending in the axial direction. The lower end of the hollow cavity 101 is an open end 102 and the upper end is a closed end 103 . It can be understood that the motor mandrel 1 is generally arranged vertically.

The sealed oil tank 2 has an oil chamber for storing cooling medium oil. The sealed oil tank 2 is located at the lower end of the motor mandrel 1, and the sealed oil tank 2 is connected with the lower end of the motor mandrel 1 in a suspension seal. The suspension seal connection is conducive to the high-speed and stable rotation of the motor mandrel 1 on the one hand, and on the other hand, it can avoid oil chamber The oil overflows from the connection between the sealed oil tank 2 and the lower end of the motor mandrel 1. The oil chamber communicates with the hollow cavity 101 through the open end 102 , so that the oil delivery pipe 3 can be conveniently installed to transport oil from the oil chamber to the upper part of the hollow cavity 101 through the oil delivery pipe 3 .

The oil delivery pipe 3 is arranged in the oil chamber and the hollow cavity 101, the lower end of the oil delivery pipe 3 extends into the oil chamber, and the upper end of the oil delivery pipe 3 extends into the hollow cavity 101 and is close to the closed end 103, so that the oil delivery pipe 3 can be used to conveniently discharge the oil Delivery from the oil chamber to the upper part of the hollow chamber 101. The upper end of the oil delivery pipe 3 is connected with a fuel injection pipe 4 with a nozzle. When the fuel injection pipe 4 sprays oil, the oil ejected from the nozzle is ejected in a direction tangential to the rotation direction of the inner wall of the hollow cavity 101, and the fuel injection tangential velocity of the nozzle is the same as that of the hollow cavity. The inner wall of the cavity 101 rotates at the same tangential speed, so that the oil at the nozzle and the rotating inner wall of the hollow cavity 101 remain relatively stationary in the tangential direction, and the oil adheres to the inner wall of the hollow cavity 101 without shearing, preventing the oil from splashing. Eliminates the shear circulation and heat generated by the oil in the cylindrical gap between the inner wall of the hollow cavity 101 of the motor mandrel 1 and the outer peripheral surface of the oil delivery pipe 3 during axial oil injection, so that the oil can flow from the hollow cavity of the motor mandrel 1 The upper part of the inner wall of 101 slides naturally along the inner wall of the hollow cavity 101, falls into the sealed oil tank 2, and then dissipates heat through the shell of the sealed oil tank 2, so that the heat on the motor mandrel 1 can be taken away by using the cooling medium oil. The motor shaft 1 is effectively cooled. The life of the energy storage motor is extended.

The electric drive oil pump 5 is arranged in the oil chamber, and is connected with the lower end of the oil delivery pipe 3, so that the oil in the oil chamber passes through the oil delivery pipe 3 and the oil injection pipe 4 and sprays out from the nozzle. It can be understood that the electric drive oil pump 5 provides power for the oil delivery, and the oil in the sealed oil tank 2 can be conveniently delivered to the upper part of the hollow cavity 101 through the electric drive oil pump 5 and the oil delivery pipe 3, so as to realize oil circulation, which can The motor shaft 1 is effectively cooled.

According to the heat conduction oil cooling device 1000 in the hollow shaft of the motor rotor according to the embodiment of the first aspect of the present invention, the oil in the sealed oil tank 2 is delivered to the hollow cavity 101 of the motor mandrel 1 by using the electric drive oil pump 5, the oil delivery pipe 3 and the oil injection pipe 4 Since the tangential velocity of the fuel injection at the nozzle of the fuel injection pipe 4 is the same as the tangential velocity of the inner wall rotation of the hollow cavity 101, the oil at the nozzle and the rotating inner wall of the hollow cavity 101 can be kept relatively stationary in the tangential direction, and the oil has no It is attached to the inner wall of the hollow cavity 101 in a shearing manner to prevent the oil from splashing, and eliminates the formation of shear in the cylindrical gap between the inner wall of the hollow cavity 101 of the motor mandrel 1 and the outer peripheral surface of the oil delivery pipe 3 when the oil is sprayed axially. Cut the circulation and generate heat, so that the oil naturally slides from the upper part of the inner wall of the hollow cavity 101 of the motor mandrel 1 along the inner wall of the hollow cavity 101, and falls into the sealed oil tank 2. The heat on the motor mandrel 1 can be dissipated by using the cooling medium oil. Take it away, and then dissipate heat through the housing of the sealed oil tank 2. Under the action of the electric drive oil pump 5, the oil fluid can be continuously circulated, the motor mandrel 1 can be effectively cooled, the temperature of the motor rotor can be prevented from exceeding the design limit, and the service life of the motor can be extended.

As shown in Figure 2, according to an embodiment of the first aspect of the present invention, it also includes a heat exchange tube 6, the heat exchange tube 6 is interference fit and axially nested in the hollow cavity 101, so as to ensure that the heat exchange tube 6 and the motor core The shaft 1 rotates synchronously; the inner wall of the heat exchange tube 6 is provided with a plurality of fins 601 at intervals in the circumferential direction, and each fin 601 extends in the axial direction; the oil delivery pipe 3 passes through the heat exchange tube 6 in the axial direction, and the oil delivery pipe 3 The upper end of the upper end of the heat exchange tube 6 is higher than the heat exchange tube 6, so when the oil injection tube 4 sprays oil, the oil slides from the top of the heat exchange tube 6 along the inner wall of the heat exchange tube 6 and the fins 601, and passes through the heat exchange tube 6 A plurality of fins 601 are arranged on the top, which increases the contact area between the oil and the heat exchange tube 6 , improves the heat transfer coefficient, and can effectively cool the motor shaft 1 more quickly.

As shown in Figure 1, according to a further embodiment of the first aspect of the present invention, the lower end of the heat exchange tube 6 is flush with the open end 102 of the hollow cavity 101 to facilitate installation; The end 103 is provided with a distance, and the oil injection pipe 4 is located between the upper end of the heat exchange tube 6 and the closed end 103 of the hollow cavity 101, which can ensure that the oil injection pipe 4 sprays oil to the rotating inner wall of the hollow cavity 101 of the motor mandrel 1, so that The oil slides down from the top of the heat exchange tube 6 along the inner wall of the heat exchange tube 6 and the fins 601 to effectively cool the motor shaft 1 .

As shown in FIG. 2 , according to a further embodiment of the first aspect of the present invention, the radial section of each fin 601 is wedge-shaped, and two adjacent fins 601 and the inner wall of the heat exchange tube 6 form an axially penetrating recess. The shape of the groove, the cross section of the groove is roughly quadrangular. Therefore, on the one hand, the wedge-shaped fins 601 can increase a larger contact area; on the other hand, the formed grooves facilitate oil to slide down along the grooves.

As shown in Figure 2, according to an embodiment of the first aspect of the present invention, there are multiple fuel injection pipes 4, and a plurality of fuel injection pipes 4 are distributed circumferentially at intervals on the upper end of the oil delivery pipe 3, for example, there are two fuel injection pipes 4 , the two fuel injection pipes 4 are axially spaced apart on the upper end of the fuel delivery pipe 3 . Therefore, using multiple oil injection pipes 4 to spray oil at the same time is beneficial to speed up the cooling speed of the motor mandrel 1 and improve the cooling effect.

As shown in Figure 3, according to an embodiment of the first aspect of the present invention, the top of the sealed oil tank 2 is provided with an installation port 201, the lower end of the motor mandrel 1 is installed in the installation port 201, and the peripheral wall of the installation port 201 and the motor A spiral groove sealing structure is formed on the outer peripheral surface of the lower end of the mandrel 1 , so that the sealed oil tank 2 is connected to the lower end of the motor mandrel 1 in a floating and sealed manner. It can be understood that a molecular pump sealing structure is formed on the peripheral wall of the installation port 201 and the lower end outer peripheral surface of the motor mandrel 1, that is, on the peripheral wall of the installation port 201 of the sealed oil tank 2 and at the lower end of the motor mandrel 1 Spiral grooves 202 are provided on the outer peripheral surface to form a spiral groove 202 sealing structure, which does not require additional input power and can prevent oil droplets or oil mist in the oil chamber from overflowing from the connection between the sealed oil tank 2 and the lower end of the motor mandrel 1. It is beneficial to maintain the vacuum degree of the main vacuum chamber of the energy storage motor 2000 .

As shown in Fig. 1, according to an embodiment of the first aspect of the present invention, the electric drive oil pump 5 has a suction port 501, and the suction port 501 is adjacent to the bottom of the oil chamber. Because the oil temperature of the oil in the sealed oil tank 2 near the bottom of the oil chamber is lower than the oil temperature near the top of the oil chamber, the suction port 501 of the electric drive oil pump 5 is arranged near the bottom of the oil chamber, which is relatively convenient for suction. low temperature oil. Further, the suction port 501 faces the bottom of the oil chamber, which is more conducive to sucking low-temperature oil.

As shown in Figure 1, according to an embodiment of the first aspect of the present invention, the outer peripheral surface of the sealed oil tank 2 is provided with an oil tank heat sink 203, and the oil tank heat sink 203 can be a cooling fin, which can make the oil of the sealed oil tank 2 The heat dissipates more quickly.

The invention also discloses a flywheel energy storage motor 2000 .

A flywheel energy storage motor 2000 according to a second embodiment of the present invention will be described below with reference to FIGS. 1 to 3 .

As shown in Figures 1 to 3, a flywheel energy storage motor 2000 according to an embodiment of the second aspect of the present invention includes a heat transfer oil cooling device 1000 in the hollow shaft of the motor rotor according to any embodiment of the first aspect of the present invention, a housing 7, Motor stator 8, motor rotor 9 and flywheel rotor 10. Wherein the shell 7 is formed with a shell 7 chamber, the bottom of the shell 7 is in sealing connection with the outer peripheral surface of the sealed oil tank 2 and the motor mandrel 1 is located in the shell 7 chamber; the motor stator 8 is located in the shell 7 chamber, and the motor stator 8 and The inner wall of the casing 7 is fixed; the motor rotor 9 is coaxially arranged with the motor stator 8, the motor rotor 9 is sleeved on the outer peripheral surface of the motor mandrel 1, and the motor rotor 9 and the motor mandrel 1 can rotate synchronously with respect to the motor stator 8; The flywheel rotor 10 is located in the casing 7 , and the flywheel rotor 10 is coaxially arranged on the top of the motor shaft 1 .

According to the flywheel energy storage motor 2000 of the embodiment of the second aspect of the present invention, since the heat transfer oil cooling device 1000 in the hollow shaft of the motor rotor of any embodiment of the first aspect of the present invention is adopted, the motor mandrel 1 can be placed on the motor shaft 1 by using the cooling medium oil The heat is taken away to effectively cool the motor mandrel 1.

According to an embodiment of the second aspect of the present invention, the shell 7 is provided with a shell heat sink 701 on a position corresponding to the motor stator 8 , and the shell heat sink 701 can be a cooling water tank for the shell to realize heat dissipation to the motor stator 8 .

According to an embodiment of the second aspect of the present invention, according to an embodiment of the second aspect of the present invention, it also includes an upper radial electromagnetic bearing 11 and a lower radial electromagnetic bearing 12, an upper radial electromagnetic bearing 11 and a lower radial electromagnetic bearing 12 are respectively fixed on the housing through the first mounting piece 17 and the second mounting piece 18, and the upper radial electromagnetic bearing 11 and the lower radial electromagnetic bearing 12 are correspondingly suspended and supported on the radial suspension journal surface and the lower end of the upper end of the motor shaft The radial suspension journal surface realizes the non-contact radial suspension of the motor mandrel.

According to an embodiment of the second aspect of the present invention, it also includes an upper thrust disc 13, a lower thrust disc 14, an upper thrust bearing stator 15 and a lower thrust bearing stator 16; the upper thrust disc 13 and the lower thrust disc 14 are correspondingly fixed on the flywheel rotor On the upper and lower outer peripheral surfaces of the flywheel rotor mandrel shaft, the upper thrust bearing stator 15 is located above the upper thrust disc 13 and is fixed on the housing through a third mounting piece 19, and the lower thrust bearing stator 16 is located on the lower thrust disc 14 and is fixed on the housing through the first mounting piece 17 to realize the non-contact axial suspension of the flywheel rotor core shaft.

According to an embodiment of the second aspect of the present invention, it also includes an upper radial electromagnetic bearing 11, a lower radial electromagnetic bearing 12, an upper thrust disc 13, a lower thrust disc 14, an upper thrust bearing stator 15 and a lower thrust bearing stator 16; wherein , the upper radial electromagnetic bearing 11 and the lower radial electromagnetic bearing 12 are respectively fixed on the casing by the first mounting piece 17 and the second mounting piece 18, and the upper radial electromagnetic bearing 11 and the lower radial electromagnetic bearing 12 are correspondingly suspended and supported on The upper radial suspension journal surface and the lower radial suspension journal surface of the motor mandrel realize the non-contact radial suspension of the motor mandrel; the upper thrust disc 13 and the lower thrust disc 14 are correspondingly fixed on the flywheel rotor of the flywheel rotor On the outer peripheral surface of the upper end and the outer peripheral surface of the lower end of the mandrel, the upper thrust bearing stator 15 is located above the upper thrust disk 13 and is fixed on the housing through the third mounting piece 19, and the lower thrust bearing stator 16 is located below the lower thrust disk 14 and The non-contact axial suspension of the flywheel rotor core shaft is realized by fixing the first mounting part 17 on the casing. Thus, the radial and axial full magnetic levitation of the energy storage flywheel motor shafting in the embodiment of the second aspect of the present invention is realized.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (12)

1. heat conduction oil cooling device in a kind of rotor hollow shaft characterized by comprising

Motor mandrel, the motor mandrel limit the hollow cavity in axial direction extended, and the lower end of the hollow cavity is unlimited End and upper end are closed end；

Leakproof fuel cell, the leakproof fuel cell have oil-in chamber, and the leakproof fuel cell is located at the lower end of the motor mandrel, described close Oil sealing case is connect with the lower end suspending sealing of the motor mandrel and the oil-in chamber passes through the open end and the hollow cavity Connection；

Petroleum pipeline, the petroleum pipeline are arranged in the oil-in chamber and the hollow cavity, and the lower end of the petroleum pipeline is protruded into described In oil-in chamber, the upper end of the petroleum pipeline is protruded into the hollow cavity and close to the closed end；The upper end of the petroleum pipeline connects It is connected to the spray bar with spout, when the spray bar oil spout, the oil that the spout sprays is along the inner wall rotation side of the hollow cavity To tangential direction spray, and the spout oil spout tangential velocity is identical as the inner wall rolling tangential speed of the hollow cavity；

Electric displacement of reservoir oil pump, the electricity displacement of reservoir oil pump setting are connected in the oil-in chamber, and with the lower end of the petroleum pipeline, will be described Oil in oil-in chamber is sprayed sequentially through the petroleum pipeline and the spray bar from the spout.

2. heat conduction oil cooling device in rotor hollow shaft according to claim 1, which is characterized in that further include:

Heat exchanger tube, the heat exchanger tube interference fit is axially nested in the hollow cavity, and the inner wall of the heat exchanger tube is in circumferential direction side It is equipped at intervals with multiple fins upwards, each fin in axial direction extends；The petroleum pipeline axially across the heat exchanger tube, And the upper end of the petroleum pipeline is higher by the heat exchanger tube.

3. heat conduction oil cooling device in rotor hollow shaft according to claim 2, which is characterized in that the heat exchanger tube Lower end it is concordant with the open end of the hollow cavity, the upper end of the heat exchanger tube and the closed end of the hollow cavity are set There is spacing, the spray bar is located between the upper end of the heat exchanger tube and the closed end of the hollow cavity.

4. heat conduction oil cooling device in rotor hollow shaft according to claim 2, which is characterized in that each wing The radial section of piece is wedge shape, the inner wall of the two neighboring fin and the heat exchanger tube formed one axially through groove.

5. heat conduction oil cooling device in rotor hollow shaft according to claim 1, which is characterized in that the spray bar Have multiple, multiple spray bars are in the circumferentially-spaced distribution in the upper end of the petroleum pipeline.

6. heat conduction oil cooling device in rotor hollow shaft according to claim 1, which is characterized in that the Seal Oil The top of case is equipped with installing port, and the lower end of the motor mandrel is mounted in the installing port, on the peripheral wall of the installing port It is formed with molecule pump packing structure on the lower end periphery face of the motor mandrel, so that the leakproof fuel cell and the motor core The lower end suspending sealing of axis connects.

7. heat conduction oil cooling device in rotor hollow shaft according to claim 1, which is characterized in that the electricity displacement of reservoir oil Pump has suction inlet, and the suction inlet is towards the bottom of the oil-in chamber.

8. heat conduction oil cooling device in rotor hollow shaft according to claim 1, which is characterized in that the Seal Oil The outside circumference of case is equipped with fuel tank radiating piece.

9. a kind of flywheel energy storage motor characterized by comprising

Heat conduction oil cooling device in rotor hollow shaft described in any one of -8 according to claim 1；

Shell, the shell are formed with shell chamber, and the outside circumference sealing of the bottom of the shell and the leakproof fuel cell connects It connects and the motor mandrel is located in the shell chamber；

Motor stator, the motor stator are located in the shell chamber, and the inner wall of the motor stator and the shell is fixed；

Rotor, the rotor and the motor stator are coaxially disposed, and the rotor is socketed in the motor core On the outer peripheral surface of axis, and the rotor and the motor mandrel can synchronous rotaries relative to the motor stator；

Flywheel rotor, the flywheel rotor are located in the shell, and the flywheel rotor is co-axially located at the motor mandrel Top.

10. flywheel energy storage motor according to claim 9, which is characterized in that on the shell with the motor stator Corresponding position is equipped with shell radiating piece.

11. flywheel energy storage motor according to claim 9, which is characterized in that further include upper radial magnetic bearing and lower diameter Pass through the first installation part and the second installation respectively to electromagnetic bearing, the upper radial magnetic bearing and the lower radial magnetic bearing Part is fixed on the housing, the upper radial magnetic bearing and the lower radial magnetic bearing correspondingly suspension support described On the upper end radial suspension journal surface and lower end radial suspension journal surface of motor mandrel, the contactless diameter of the motor mandrel is realized To suspension.

12. flywheel energy storage motor according to claim 9, feature are taken notice of, further include lifting force disk, lower thrust disk, on Thrust bearing stator and lower thrust-bearing stator；The lifting force disk and the lower thrust disk are correspondingly fixed on the flywheel and turn On the upper and lower end outer peripheral surface of upper end outer peripheral surface of the flywheel rotor mandrel of son, the up-thrust bearing stator is located at the lifting force The top of disk and fixed on the housing by third installation part, the lower thrust-bearing stator is located at the lower thrust disk Lower section and fixed on the housing by first installation part, realizes that the contactless axial direction of the flywheel rotor mandrel is outstanding It is floating.