CN220652526U - High-rotation-speed high-current liquid metal conductive slip ring - Google Patents
High-rotation-speed high-current liquid metal conductive slip ring Download PDFInfo
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- CN220652526U CN220652526U CN202322275619.0U CN202322275619U CN220652526U CN 220652526 U CN220652526 U CN 220652526U CN 202322275619 U CN202322275619 U CN 202322275619U CN 220652526 U CN220652526 U CN 220652526U
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- liquid metal
- movable electrode
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- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 54
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 32
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 210000004907 gland Anatomy 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000110 cooling liquid Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 229910000846 In alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910002058 ternary alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model relates to a high-rotation-speed high-current liquid metal conductive slip ring, and belongs to the technical field of electric connecting pieces. The conductive slip ring comprises a fixed electrode, a movable electrode and a sealing assembly, wherein the two ends of the movable electrode are respectively an A end and a B end, the two ends of the fixed electrode are respectively an A 'end and a B' end, the A end of the movable electrode and the A 'end of the fixed electrode are respectively externally connected with two poles of the same power supply, the B end of the movable electrode and the B' end of the fixed electrode are respectively inserted into the sealing assembly from the two ends of the sealing assembly, the movable electrode rotates relative to the fixed electrode, a gap formed by the B end of the movable electrode and the B 'end of the fixed electrode is filled with gallium-based liquid metal, and the B end of the movable electrode and the B' end of the fixed electrode are electrically connected through the gallium-based liquid metal. The gallium liquid metal can be used as a conducting medium and a lubricating medium between the fixed electrode and the movable electrode, and the service life of the conducting slip ring can be prolonged.
Description
Technical Field
The utility model relates to a high-rotation-speed high-current liquid metal conductive slip ring, and belongs to the technical field of electric connecting pieces.
Background
The conductive slip ring can be used for manufacturing equipment in the fields of national defense and military industry such as mechanical automation equipment, industrial automatic control systems, tip weapon systems, aerospace and the like. At present, the conductive slip ring is used in the special fields of wind power generation, nuclear power, high-speed rail and the like, and the conductive slip ring can rotate due to the fact that the interface is provided with the interface, so that the rigid friction at the interface is easy to increase and wear, and then the arc is easy to generate, and is difficult to apply to the environment with high rotating speed of 1000-3000rpm and high current of 2000-7000A.
Disclosure of Invention
Aiming at the application problems of the existing conductive slip ring, the utility model provides a high-rotation-speed high-current liquid metal conductive slip ring, namely a structure of the conductive slip ring is reasonably designed, gallium liquid metal can be used as a conductive medium and a lubricating medium between a fixed electrode and a movable electrode, so that the shaft body under high current is prevented from heating, and single-point thermal breakdown is generated in a gap of the conductive slip ring under high current, thereby prolonging the service life of the conductive slip ring, and the conductive slip ring is applied to environments with high rotation speed of 1000-3000rpm and high current of 2000-7000A.
The utility model provides a high rotational speed heavy current liquid metal conductive slip ring, including fixed electrode, movable electrode and seal assembly, the both ends of movable electrode are A end and B end respectively, the both ends of fixed electrode are A ' end and B ' end respectively, the A end of movable electrode and the A ' end of fixed electrode are external two poles of same power respectively, the B end of movable electrode and the B ' end of fixed electrode insert respectively from seal assembly's both ends and establish to seal assembly inside, the movable electrode is rotatory relative to the fixed electrode, the clearance department that the B end of movable electrode and the B ' end of fixed electrode formed is filled and is provided with gallium liquid metal 9, the B end of movable electrode and the B ' end of fixed electrode are connected through gallium liquid metal 9 electricity.
The electrode is movable shaft 1, the fixed electrode is fixed shaft 11, the B end of movable shaft 1 is arc convex body structure, fixed shaft 11 is sealed with seal assembly, cylindrical clamping groove and cambered surface mating groove have been seted up in proper order to the B ' end of fixed shaft 11, the arc convex body structure of movable shaft 1B end passes the cylindrical clamping groove and extends to the cambered surface mating groove of fixed shaft 11B ' end in, arc convex body structure and cambered surface mating groove inner wall form sealed cavity, the sealed cavity intussuseption is filled with gallium liquid metal 9, the B end of movable shaft 1 and the B ' end of fixed shaft 11 are connected through gallium liquid metal 9 electricity.
The seal assembly comprises a shell 7, a first fixed ring 4 and a second fixed ring 8, wherein the two ends of the shell 7 are respectively a closed end and an open end, the open end of the shell 7 is provided with a gland 3, the B end of a movable electrode penetrates through a central through hole of the gland 3 and is inserted into the shell 7 from the open end of the shell 7, the movable electrode is rotationally connected with the inner wall of the shell 7 through a rotating bearing 5, the first fixed ring 4 is embedded into the inner wall of the shell 7, the first fixed ring 4 is positioned between the outer ring of the rotating bearing 5 and the gland 3, one end of the second fixed ring 8 is inserted into a cylindrical clamping groove at the B ' end of the fixed electrode, the other end of the second fixed ring is fixedly connected with the outer ring of the rotating bearing 5, the B end of the movable electrode sequentially penetrates through the first fixed ring 4, the inner ring of the rotating bearing 5 and the second fixed ring 8, the movable electrode can rotate in the central through hole of the gland 3, the first fixed ring 4 and the second fixed ring 8, the B ' end of the fixed electrode penetrates through the closed end of the shell 7 and is inserted into the shell 7, the inner surface of the outer surface of the shell 7, and the A ' end of the fixed electrode is attached to the outer side of the closed end of the shell 7.
The distance from the outer surface of the movable electrode to the shell 7 is greater than the thickness of the second fixed ring 8, the outer ring of the rotating bearing 5, the second fixed ring 8, the shell 7 and the fixed electrode B' end are enclosed to form a cooling cavity, the shell 7 is provided with a cooling liquid inlet and outlet 6, and the cooling liquid inlet and outlet 6 is communicated with the cooling cavity.
The sealing ring 2 is embedded in the center through hole of the gland 3 along the circumferential direction, and the B end of the movable electrode penetrates through the sealing ring 2 and rotates in the sealing ring 2.
A heating ring 10 is fixedly arranged on the wall of the cambered surface matching groove of the fixed shaft 11, and the heating ring 10 is used as a temperature compensation device.
The gallium-based liquid metal 9 can be gallium-indium alloy or gallium-indium-tin ternary alloy.
The beneficial effects of the utility model are as follows:
(1) According to the utility model, the arc-shaped closed cavity is arranged between the fixed electrode and the movable electrode, gallium liquid metal is filled in the arc-shaped closed cavity, the gallium liquid metal is used as a conducting medium and a lubricating medium between the fixed electrode and the movable electrode, so that the contact resistance between shafts can be effectively reduced, the electric transmission efficiency of the conductive slip ring can be improved due to the reduction of the contact resistance, the shaft body heating under high current can be greatly reduced, single-point thermal breakdown is easy to occur in the gap of the conductive slip ring under high current, and the high-rotation-speed running stability of the conductive slip ring of the liquid metal is ensured;
(2) According to the utility model, the cooling cavity is arranged, so that a small amount of heat generated in the rotation of the movable electrode is cooled by cooling liquid in the cooling cavity, and a large temperature difference between the fixed electrode and the movable electrode is avoided;
(3) According to the utility model, the heating ring is arranged, so that the gallium-based liquid metal can be subjected to temperature compensation, and is kept in a liquid state in a low-temperature (below 8 ℃) environment, and the use limit of the high-rotation-speed high-current liquid metal conductive slip ring at the low temperature (below 8 ℃) is broken through.
Drawings
FIG. 1 is a schematic diagram of a high-speed high-current liquid metal conductive slip ring;
in the figure, a 1-moving shaft, a 2-sealing ring, a 3-gland, a 4-first fixed ring, a 5-rotating bearing, a 6-cooling liquid inlet and outlet and 7: the device comprises a shell, an 8-second fixed ring, 9-gallium liquid metal, a 10-heating ring and an 11-fixed shaft.
Detailed Description
The utility model will be described in further detail with reference to specific embodiments, but the scope of the utility model is not limited to the description.
Example 1: the high-rotation-speed high-current liquid metal conductive slip ring (see figure 1) comprises a fixed electrode, a movable electrode and a sealing assembly, wherein the two ends of the movable electrode are respectively an A end and a B end, the two ends of the fixed electrode are respectively an A 'end and a B' end, the A end of the movable electrode and the A 'end of the fixed electrode are respectively externally connected with two poles of the same power supply, the B end of the movable electrode and the B' end of the fixed electrode are respectively inserted into the sealing assembly from the two ends of the sealing assembly, the movable electrode rotates relative to the fixed electrode, a gap formed by the B end of the movable electrode and the B 'end of the fixed electrode is filled with gallium-based liquid metal 9, and the B end of the movable electrode and the B' end of the fixed electrode are electrically connected through the gallium-based liquid metal 9;
the gallium-based liquid metal 9 can be gallium-indium alloy or gallium-indium-tin ternary alloy;
the gallium-based liquid metal is filled between the fixed electrode and the movable electrode, the gallium-based liquid metal is used as a conducting medium and a lubricating medium between the fixed electrode and the movable electrode, so that the fixed electrode and the movable electrode are not in direct contact, the gallium-based liquid metal is adopted for lubrication and flexible connection, the contact resistance between shafts can be effectively reduced, the electric transmission efficiency of the conductive slip ring can be improved due to the reduction of the contact resistance, the shaft body heating under high current can be greatly reduced, single-point thermal breakdown is easy to occur in the gap of the conductive slip ring under high current, and the high-rotating-speed running stability of the conductive slip ring of the liquid metal is ensured.
Example 2: the high-rotation-speed high-current liquid metal conductive slip ring of the embodiment is basically the same as the high-rotation-speed high-current liquid metal conductive slip ring of embodiment 1 in structure, and is different in that: the electrode is a movable shaft 1, the fixed electrode is a fixed shaft 11, the B end of the movable shaft 1 is an arc-shaped convex body structure, the fixed shaft 11 is sealed with the sealing component, the B ' end of the fixed shaft 11 is sequentially provided with a cylindrical clamping groove and an arc-shaped matching groove, the arc-shaped convex body structure at the B end of the movable shaft 1 penetrates through the cylindrical clamping groove and extends into the arc-shaped matching groove at the B ' end of the fixed shaft 11, a sealing cavity is formed by the arc-shaped convex body structure and the inner wall of the arc-shaped matching groove, gallium-based liquid metal 9 is filled in the sealing cavity, and the B end of the movable shaft 1 and the B ' end of the fixed shaft 11 are electrically connected through the gallium-based liquid metal 9;
an arc-shaped closed cavity is arranged between the fixed electrode and the movable electrode, and gallium-based liquid metal is filled in the arc-shaped closed cavity, so that the sealing of the gallium-based liquid metal is realized, and leakage is avoided.
Example 3: the high-rotation-speed high-current liquid metal conductive slip ring of the embodiment is basically the same as the high-rotation-speed high-current liquid metal conductive slip ring of embodiment 2 in structure, and is different in that: the sealing assembly comprises a shell 7, a first fixed ring 4 and a second fixed ring 8, wherein two ends of the shell 7 are respectively a closed end and an open end, the open end of the shell 7 is provided with a gland 3, the B end of a movable electrode penetrates through a central through hole of the gland 3 and is inserted into the shell 7 from the open end of the shell 7, the movable electrode is rotationally connected with the inner wall of the shell 7 through a rotating bearing 5, the first fixed ring 4 is embedded into the inner wall of the shell 7, the first fixed ring 4 is positioned between the outer ring of the rotating bearing 5 and the gland 3, one end of the second fixed ring 8 is inserted into a cylindrical clamping groove at the B ' end of the fixed electrode, the other end of the second fixed ring is fixedly connected with the outer ring of the rotating bearing 5, the B end of the movable electrode sequentially penetrates through the first fixed ring 4, the inner ring of the rotating bearing 5 and the second fixed ring 8, the movable electrode can rotate in the central through hole of the gland 3, the first fixed ring 4 and the second fixed ring 8, the B ' end of the fixed electrode penetrates through the closed end of the shell 7 and is inserted into the shell 7, the outer surface of the fixed electrode 7 is attached to the inner surface of the shell 7, and the A ' end of the fixed electrode is attached to the outer side of the shell 7;
the distance from the outer surface of the movable electrode to the shell 7 is larger than the thickness of the second fixed ring 8, the outer ring of the rotary bearing 5, the second fixed ring 8, the shell 7 and the end of the fixed electrode B' are enclosed to form a cooling cavity, the shell 7 is provided with a cooling liquid inlet and outlet 6, and the cooling liquid inlet and outlet 6 is communicated with the cooling cavity; when the high-speed high-current operation is performed, a small amount of heat generated in the rotation of the movable electrode is cooled by cooling liquid in the cooling cavity by arranging the cooling cavity, so that a large temperature difference between the fixed electrode and the movable electrode is avoided;
a sealing ring 2 is embedded in the central through hole of the gland 3 along the circumferential direction, and the B end of the movable electrode penetrates through the sealing ring 2 and rotates in the sealing ring 2;
by the arrangement of the sealing component, the sealing of the connection part of the fixed electrode and the movable electrode is realized.
Example 4: the high-rotation-speed high-current liquid metal conductive slip ring of the embodiment is basically the same as the high-rotation-speed high-current liquid metal conductive slip ring of embodiment 3 in structure, and is different in that: a heating ring 10 is fixedly arranged on the cambered surface matching groove wall of the fixed shaft 11, and the heating ring 10 is used as a temperature compensation device; by arranging the heating ring, the gallium-based liquid metal can be subjected to temperature compensation, so that the gallium-based liquid metal can be kept in a liquid state in a low-temperature (below the melting point of the gallium-based liquid alloy, for example below 8 ℃), and the use limit of the high-rotation-speed high-current liquid metal conductive slip ring at the low temperature (below the melting point of the gallium-based liquid alloy, below 8 ℃) is broken through.
While the specific embodiments of the present utility model have been described in detail, the present utility model is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present utility model within the knowledge of those skilled in the art.
Claims (6)
1. The utility model provides a high rotational speed heavy current liquid metal conductive slip ring which characterized in that: the gallium-based liquid metal sealing device comprises a fixed electrode, a movable electrode and a sealing assembly, wherein the two ends of the movable electrode are respectively an A end and a B end, the two ends of the fixed electrode are respectively an A 'end and a B' end, the A end of the movable electrode and the A 'end of the fixed electrode are respectively externally connected with two poles of the same power supply, the B end of the movable electrode and the B' end of the fixed electrode are respectively inserted into the sealing assembly from the two ends of the sealing assembly, the movable electrode rotates relative to the fixed electrode, a gap formed between the B end of the movable electrode and the B 'end of the fixed electrode is filled with gallium-based liquid metal (9), and the B end of the movable electrode and the B' end of the fixed electrode are electrically connected through the gallium-based liquid metal (9).
2. The high-speed high-current liquid metal conductive slip ring of claim 1, wherein: the electrode is movable shaft (1), the fixed electrode is dead axle (11), the B end of movable shaft (1) is arc convex body structure, dead axle (11) is sealed with seal assembly, cylindricality draw-in groove and cambered surface cooperation groove have been seted up in proper order to the B ' end of dead axle (11), the arc convex body structure of movable shaft (1) B end passes cylindricality draw-in groove and extends to the cambered surface cooperation inslot of dead axle (11) B ' end, arc convex body structure and cambered surface cooperation inslot wall form sealed cavity, sealed cavity intussuseption is filled with gallium liquid metal (9), the B end of movable shaft (1) and the B ' end of dead axle (11) are connected through gallium liquid metal (9) electricity.
3. The high-speed high-current liquid metal conductive slip ring according to claim 1 or 2, wherein: the seal assembly comprises a shell (7), a first fixed ring (4) and a second fixed ring (8), wherein the two ends of the shell (7) are respectively a closed end and an open end, the open end of the shell (7) is provided with a gland (3), the B end of a movable electrode penetrates through a central through hole of the gland (3) and is inserted into the shell (7) from the open end of the shell (7), an movable electrode is rotationally connected with the inner wall of the shell (7) through a rotating bearing (5), the first fixed ring (4) is embedded between the outer ring of the rotating bearing (5) and the gland (3), one end of the second fixed ring (8) is inserted into a cylindrical clamping groove of the B' end of the fixed electrode, the other end of the second fixed ring is fixedly connected with the outer ring of the rotating bearing (5), the B end of the movable electrode sequentially penetrates through the first fixed ring (4), the inner ring of the rotating bearing (5) and the second fixed ring (8), the movable electrode can rotate in the inner wall of the rotating bearing (5) and the inner ring of the shell (7), the fixed electrode is fixed on the inner side of the shell (7), and the outer surface of the fixed electrode is fixed on the outer surface of the shell (7).
4. A high speed high current liquid metal slip ring as defined in claim 3 wherein: the distance from the outer surface of the movable electrode to the outer shell (7) is greater than the thickness of the second fixed ring (8), the outer ring of the rotary bearing (5), the second fixed ring (8), the outer shell (7) and the end of the fixed electrode B' are enclosed to form a cooling cavity, a cooling liquid inlet and outlet (6) is formed in the outer shell (7), and the cooling liquid inlet and outlet (6) is communicated with the cooling cavity.
5. A high speed high current liquid metal slip ring as defined in claim 3 wherein: the sealing ring (2) is embedded in the center through hole of the gland (3) along the circumferential direction, and the end B of the movable electrode penetrates through the sealing ring (2) and rotates in the sealing ring (2).
6. The high-speed high-current liquid metal conductive slip ring of claim 2, wherein: a heating ring (10) is fixedly arranged on the cambered surface matching groove wall of the fixed shaft (11), and the heating ring (10) is used as a temperature compensation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322275619.0U CN220652526U (en) | 2023-08-23 | 2023-08-23 | High-rotation-speed high-current liquid metal conductive slip ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322275619.0U CN220652526U (en) | 2023-08-23 | 2023-08-23 | High-rotation-speed high-current liquid metal conductive slip ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220652526U true CN220652526U (en) | 2024-03-22 |
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ID=90264052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322275619.0U Active CN220652526U (en) | 2023-08-23 | 2023-08-23 | High-rotation-speed high-current liquid metal conductive slip ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220652526U (en) |
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2023
- 2023-08-23 CN CN202322275619.0U patent/CN220652526U/en active Active
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