CN114301219B - Superconductive liquid immersion brushless motor structure - Google Patents
Superconductive liquid immersion brushless motor structure Download PDFInfo
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- CN114301219B CN114301219B CN202111653207.5A CN202111653207A CN114301219B CN 114301219 B CN114301219 B CN 114301219B CN 202111653207 A CN202111653207 A CN 202111653207A CN 114301219 B CN114301219 B CN 114301219B
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Abstract
The invention discloses a superconducting liquid immersion type brushless motor structure, which comprises: a motor housing; a superconducting rotor mounted in the motor housing, the superconducting rotor comprising: the superconducting rotor comprises a superconducting rotor body and a motor shaft connected to the superconducting rotor body; install in the motor casing, and the cover is established at the outside superconductive stator of superconductive rotor, superconductive stator includes: the phase A superconducting coil and a phase A outgoing line connected with the phase A superconducting coil, the phase B superconducting coil and a phase B outgoing line connected with the phase B superconducting coil, and the phase C superconducting coil and a phase C outgoing line connected with the phase C superconducting coil; a motor controller connected with the A phase outgoing line, the B phase outgoing line and the C phase outgoing line respectively; and a motor end cap secured to the open end of the motor housing. By implementing the superconducting liquid immersion type brushless motor structure, a transmission shaft penetrating through a heat insulation layer of superconducting power equipment is avoided, and the motor can work in a superconducting state, so that the energy consumption of the motor can be reduced; the assembly structure is reasonable, and the volume of the motor is further reduced.
Description
Technical Field
The invention relates to the technical field of superconducting equipment, in particular to a superconducting liquid immersion type brushless motor structure.
Background
A superconductor is a conductor having zero resistance characteristics at critical temperatures, which reduces resistive losses during power transmission.
In the prior art, when the superconductor is adopted to construct the electric energy transmission equipment, besides the superconductor used for transmitting current, auxiliary components such as a disconnecting switch, a liquid nitrogen pump, a liquid nitrogen valve and the like are needed, and the components need to adopt a motor as a power source, such as a common motor, a transmission shaft needs to be adopted for connection, and the transmission shaft needs to penetrate through a heat insulation layer of the superconducting power equipment, so that the heat loss of liquid nitrogen is caused, and the whole energy consumption of the system is increased.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a superconducting liquid immersion type brushless motor structure, which avoids arranging a transmission shaft penetrating through a heat insulation layer of superconducting power equipment, and the motor can work in a superconducting state, so that the energy consumption of the motor can be reduced; the assembly structure is reasonable, and the volume of the motor is further reduced.
In order to solve the above technical problems, the present invention provides a superconducting liquid immersion brushless motor structure, including: the motor casing is of a hollow accommodating structure, and the opposite sides of the motor casing are respectively provided with an opening end and a sealing end; a superconducting rotor mounted in the motor housing, the superconducting rotor comprising: the superconducting rotor comprises a superconducting rotor body and a motor shaft connected to the superconducting rotor body, wherein N stages of superconducting blocks and S stages of superconducting blocks are arranged on the superconducting rotor body at intervals; the superconducting rotor body is provided with a liquid nitrogen drainage groove, and when the superconducting rotor rotates, the liquid nitrogen drainage groove stirs liquid nitrogen between the superconducting rotor and an air gap of the superconducting stator to enable the liquid nitrogen to flow along the radial direction so as to realize uniform temperature of each part of the motor; install in the motor casing, and the cover is established at the outside superconductive stator of superconductive rotor, superconductive stator includes: the phase A superconducting coil and a phase A outgoing line connected with the phase A superconducting coil, the phase B superconducting coil and a phase B outgoing line connected with the phase B superconducting coil, and the phase C superconducting coil and a phase C outgoing line connected with the phase C superconducting coil; a motor controller connected with the A phase outgoing line, the B phase outgoing line and the C phase outgoing line respectively; and a motor end cap secured to the open end of the motor housing, wherein: opposite ends of the motor shaft are respectively led out from the motor end cover and the sealing end of the motor shell, and the A-phase lead-out wire, the B-phase lead-out wire and the C-phase lead-out wire are respectively led out from the sealing end of the motor shell; the superconductive rotor contacts with the motor shell and the shaft hole of the motor end cover to generate heat due to friction, and the local liquid nitrogen is heated and gasified to form a nitrogen film between the shaft hole and the rotor shaft.
The motor controller generates a driving voltage with a three-phase angle of 120 degrees, the superconducting stator generates a rotating magnetic field, and the rotating magnetic field drives the superconducting rotor to rotate through magnetic induction.
Wherein, set up first liquid nitrogen drainage hole on the sealed end.
Wherein, still offer first shaft hole and stator wire and draw forth the hole on the sealed end.
Wherein, set up second shaft hole and second liquid nitrogen drainage hole on the motor end cover.
Wherein the A phase superconducting coil, the B phase superconducting coil and the C phase superconducting coil are wound in a plane single layer.
The superconducting liquid immersion type brushless motor structure has the following beneficial effects: the superconducting liquid immersion brushless motor structure includes: the motor casing is of a hollow accommodating structure, and the opposite sides of the motor casing are respectively provided with an opening end and a sealing end; a superconducting rotor mounted in the motor housing, the superconducting rotor comprising: the superconducting rotor comprises a superconducting rotor body and a motor shaft connected to the superconducting rotor body, wherein N stages of superconducting blocks and S stages of superconducting blocks are arranged on the superconducting rotor body at intervals; install in the motor casing, and the cover is established at the outside superconductive stator of superconductive rotor, superconductive stator includes: the phase A superconducting coil and a phase A outgoing line connected with the phase A superconducting coil, the phase B superconducting coil and a phase B outgoing line connected with the phase B superconducting coil, and the phase C superconducting coil and a phase C outgoing line connected with the phase C superconducting coil; a motor controller connected with the A phase outgoing line, the B phase outgoing line and the C phase outgoing line respectively; and a motor end cap secured to the open end of the motor housing, wherein: opposite ends of a motor shaft are respectively led out from a motor end cover and a sealing end of a motor shell, and an A-phase lead-out wire, a B-phase lead-out wire and a C-phase lead-out wire are respectively led out from the sealing end of the motor shell, so that a transmission shaft penetrating through a heat insulation layer of superconducting power equipment is avoided, the motor can work in a superconducting state, and the energy consumption of the motor can be reduced; the assembly structure is reasonable, and the volume of the motor is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a superconducting liquid-immersed brushless motor according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a blasting structure of a superconducting liquid-immersed brushless motor according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a motor casing of a superconducting liquid-immersed brushless motor according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a superconducting rotor of a superconducting liquid-immersed brushless motor structure according to an embodiment of the present invention.
Fig. 5 is a schematic diagram showing a broken structure of a superconducting stator of a superconducting liquid-immersed brushless motor structure according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a motor end cover of a superconducting liquid-immersed brushless motor structure according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, a superconducting liquid immersion type brushless motor structure according to a first embodiment of the present invention is shown.
The superconducting liquid immersion brushless motor structure in this embodiment includes: the motor casing 1, the motor casing 1 is a hollow accommodating structure, and two opposite sides of the motor casing 1 are respectively provided with an opening end 11 and a sealing end 12; a superconducting rotor 2 mounted in the motor casing 1, the superconducting rotor 2 including: the superconducting rotor comprises a superconducting rotor body 21 and a motor shaft 22 connected to the superconducting rotor body 21, wherein a superconducting block N stage 211 and a superconducting block S stage 212 are arranged on the superconducting rotor body 21 at intervals.
Install in motor casing 1, and the superconductive stator 3 of cover outside superconductive rotor 2, superconductive stator 3 includes: a-phase superconducting coil 31, a-phase lead line 32 connected to the a-phase superconducting coil 31, B-phase superconducting coil 34, B-phase lead line 35 connected to the B-phase superconducting coil 34, C-phase superconducting coil 37, and C-phase lead line 38 connected to the C-phase superconducting coil 37.
A motor controller connected to the a-phase lead line 32, the B-phase lead line 35, and the C-phase lead line 38, respectively; and a motor end cap 4 fastened to the open end 11 of the motor casing 1, wherein: opposite ends of the motor shaft 22 are respectively led out from the motor end cover 4 and the sealing end 12 of the motor casing 1, and an A-phase lead-out line 32, a B-phase lead-out line 35 and a C-phase lead-out line 38 are respectively led out from the sealing end 12 of the motor casing 1.
Preferably, the motor shaft diameter is 12.00mm. The motor shaft is made of 304 stainless steel and is bonded with the superconducting block.
In specific implementation, the motor casing 1, the superconducting rotor 2, the superconducting stator 3 and the motor end cover 4 are coaxially arranged. The superconducting rotor 2 is loosely matched with the shaft holes of the motor shell 1 and the motor end cover 4, and the clearance is 0.05mm. The superconducting stator 3 and the motor casing 1 are bonded by low-temperature glue. The motor end cover 4 and the motor shell 1 are assembled by interference fit.
The motor casing 1 is hollow accommodation structure, and its opposite both sides are equipped with open end 11 and sealed end 12 respectively, and superconducting rotor 2 installs in the motor casing 1, and superconducting rotor 2 includes: the superconducting rotor comprises a superconducting rotor body 21 and a motor shaft 22 connected to the superconducting rotor body 21, wherein a superconducting block N stage 211 and a superconducting block S stage 212 are arranged on the superconducting rotor body 21 at intervals.
Wherein, the superconducting rotor body 21 is provided with a liquid nitrogen drainage groove 23.
Further, a first liquid nitrogen drainage hole 121 is formed in the sealing end 12, a first shaft hole 122 and a stator wire drainage hole 123 are also formed in the sealing end 12, and a second shaft hole 41 and a second liquid nitrogen drainage hole 42 are formed in the motor end cover 4. In implementation, the diameter of the shaft hole can be set to be 12.05mm, and the diameter of the liquid nitrogen drainage hole can be set to be a 3mm through hole for circulating liquid nitrogen. The diameter of the stator wire lead-out hole may be set to be a 2mm through hole for leading out the stator wire.
Further, the superconducting stator 3 is sleeved outside the superconducting rotor 2, and the superconducting stator 3 includes: a-phase superconducting coil 31, a-phase lead line 32 connected to the a-phase superconducting coil 31, B-phase superconducting coil 34, B-phase lead line 35 connected to the B-phase superconducting coil 34, C-phase superconducting coil 37, and C-phase lead line 38 connected to the C-phase superconducting coil 37.
In practice, the a-phase superconducting coil 31, the B-phase superconducting coil 34 and the C-phase superconducting coil 37 are wound in a planar single layer, the adopted superconducting tapes are rectangular superconducting tapes with the thickness of 1mm by 0.5mm, and the winding mode is single-layer winding. The connection method of the stator winding is Y-shaped connection method, one end of the A, B, C three-phase winding is respectively connected with the outgoing line, and the other end is connected with the neutral point connecting line.
Further, the method further comprises the following steps: and a motor controller connected to the a-phase lead line 32, the B-phase lead line 35, and the C-phase lead line 38, respectively. When the superconducting rotor works, the three-phase outgoing lines are connected with the motor controller, the motor controller generates driving voltage with three-phase angles of 120 degrees, a rotating magnetic field is generated in the stator winding, and the rotating magnetic field drives the superconducting rotor 2 to rotate through magnetic induction.
In the specific implementation of the superconducting liquid immersion brushless motor structure in this embodiment, the superconducting rotor is made of superconducting blocks, the superconducting rotor 2 is nonmagnetic at normal temperature, and after the superconducting motor is assembled, the whole superconducting motor 2 is immersed in liquid nitrogen, and the superconducting rotor is cooled to a superconducting critical temperature. And (3) connecting the BC phase of the superconducting motor in parallel, and introducing 1000A direct current between the A phase and the BC phase of the superconducting stator to maintain for 100ms, so that radial magnetizing of the superconducting rotor is completed.
Since the superconducting bulk N stage 211 and the superconducting bulk S stage 212 are in a superconducting state, the magnetic field does not disappear after the magnetizing current is removed, and the superconducting rotor is in a permanent magnet state. When the superconducting rotor 2 rotates, the liquid nitrogen drainage groove 23 stirs liquid nitrogen between the air gaps of the superconducting rotor 2 and the superconducting stator 3, so that the liquid nitrogen flows along the radial direction, and the temperature uniformity of the motor is realized.
Meanwhile, the contact position of the superconducting rotor 2 and the shaft holes of the motor shell 1 and the motor end cover 4 generates heat due to friction, so that partial liquid nitrogen is heated and gasified, and a nitrogen film is formed between the shaft holes and the rotor shaft, thereby playing a role in lubrication.
The superconducting liquid immersion type brushless motor structure has the following beneficial effects:
first, the opposite ends of motor shaft are drawn forth by the sealed end of motor end cover and motor casing respectively, and A looks lead-out wire, B looks lead-out wire and C looks lead-out wire are drawn forth by the sealed end of motor casing respectively, avoid setting up the transmission shaft that pierces through superconductive power equipment heat insulating layer. When the superconducting rotor rotates, the liquid nitrogen drainage groove stirs liquid nitrogen between the superconducting rotor and the air gap of the superconducting stator, so that the liquid nitrogen flows along the radial direction, and the temperature uniformity of the motor at each position is realized. The motor can work in a superconducting state, so that the energy consumption of the motor can be reduced.
And the second, superconductive rotor and motor shell, motor end cover shaft hole contact position because of friction produces heat, leads to the local liquid nitrogen to be heated and gasified, forms the nitrogen film between shaft hole and rotor shaft to play the lubricated effect.
Thirdly, the assembly structure is reasonable, and the volume of the motor is further reduced.
Claims (6)
1. A superconducting liquid-immersed brushless motor structure, comprising:
the motor casing is of a hollow accommodating structure, and the opposite sides of the motor casing are respectively provided with an opening end and a sealing end;
a superconducting rotor mounted in the motor housing, the superconducting rotor comprising: the superconducting rotor comprises a superconducting rotor body and a motor shaft connected to the superconducting rotor body, wherein N stages of superconducting blocks and S stages of superconducting blocks are arranged on the superconducting rotor body at intervals; the superconducting rotor body is provided with a liquid nitrogen drainage groove, and when the superconducting rotor rotates, the liquid nitrogen drainage groove stirs liquid nitrogen between the superconducting rotor and an air gap of the superconducting stator to enable the liquid nitrogen to flow along the radial direction so as to realize uniform temperature of each part of the motor;
install in the motor casing, and the cover is established superconducting stator outside the superconducting rotor, superconducting stator includes: the phase A superconducting coil and a phase A outgoing line connected with the phase A superconducting coil, the phase B superconducting coil and a phase B outgoing line connected with the phase B superconducting coil, and the phase C superconducting coil and a phase C outgoing line connected with the phase C superconducting coil;
the motor controller is respectively connected with the A-phase outgoing line, the B-phase outgoing line and the C-phase outgoing line; and
a motor end cap secured to the open end of the motor housing, wherein: opposite ends of the motor shaft are respectively led out from the motor end cover and the sealing end of the motor shell, and the A-phase lead-out wire, the B-phase lead-out wire and the C-phase lead-out wire are respectively led out from the sealing end of the motor shell;
the superconductive rotor contacts with the motor shell and the shaft hole of the motor end cover to generate heat due to friction, and the local liquid nitrogen is heated and gasified to form a nitrogen film between the shaft hole and the rotor shaft.
2. The superconducting liquid-immersed brushless motor structure of claim 1, wherein the motor controller generates a driving voltage having a three-phase angle of 120 degrees, the superconducting stator generates a rotating magnetic field, and the rotating magnetic field drives the superconducting rotor to rotate by magnetic induction.
3. The superconducting liquid-immersed brushless motor structure of claim 1, wherein the sealing end is provided with a first liquid nitrogen drainage hole.
4. The superconducting liquid-immersed brushless motor structure of claim 3, wherein the sealing end is further provided with a first shaft hole and a stator lead-out hole.
5. The superconducting liquid-immersed brushless motor structure of claim 1, wherein the motor end cap is provided with a second shaft hole and a second liquid nitrogen drainage hole.
6. The superconducting liquid-immersed brushless motor structure of claim 1, wherein the a-phase superconducting coil, the B-phase superconducting coil and the C-phase superconducting coil are planar single-layer windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111653207.5A CN114301219B (en) | 2021-12-30 | 2021-12-30 | Superconductive liquid immersion brushless motor structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111653207.5A CN114301219B (en) | 2021-12-30 | 2021-12-30 | Superconductive liquid immersion brushless motor structure |
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| CN114301219A CN114301219A (en) | 2022-04-08 |
| CN114301219B true CN114301219B (en) | 2023-08-08 |
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| CN114301219A (en) | 2022-04-08 |
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