CN111478140A - A electrically conductive rolling ring for electricity transmission rotary joint - Google Patents
A electrically conductive rolling ring for electricity transmission rotary joint Download PDFInfo
- Publication number
- CN111478140A CN111478140A CN202010247251.5A CN202010247251A CN111478140A CN 111478140 A CN111478140 A CN 111478140A CN 202010247251 A CN202010247251 A CN 202010247251A CN 111478140 A CN111478140 A CN 111478140A
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- China
- Prior art keywords
- ring
- flexible
- retainer
- rotary joint
- rolling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/08—Slip-rings
- H01R39/12—Slip-rings using bearing or shaft surface as contact surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/64—Devices for uninterrupted current collection
- H01R39/643—Devices for uninterrupted current collection through ball or roller bearing
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- Rolling Contact Bearings (AREA)
Abstract
The invention relates to a conductive rolling ring for an electric transmission rotary joint, which comprises an inner ring, an outer ring, a retainer and 2L flexible rings, wherein L is more than or equal to 1, the axial corresponding positions of the outer ring and the inner ring comprise two parallel roller paths, each roller path is internally provided with L flexible rings, L flexible rings are uniformly distributed along the circumferential direction at intervals of the retainer and are used for realizing the electric communication between the inner ring and the outer ring, the inner ring is also provided with a third roller path which is marked as a supporting roller path and is positioned between the two flexible ring roller paths, the retainer is also provided with L supporting bearings, an inner ring of each supporting bearing is fixed on the structure of the retainer by a pin shaft, an outer ring of each supporting bearing is fixed in the corresponding supporting roller path of the inner ring of the rolling ring and is used for supporting the self structure of the retainer to be axially and radially positioned, and the two directions are independent from the flexible rings.
Description
Technical Field
The invention relates to a conductive rolling ring for an electric transmission rotary joint, which is used in ultra-high power application occasions such as manned space stations, solar space power stations and the like and belongs to the technical field of space rolling conductive rings.
Background
The rolling ring has the advantages of large number of rollers, small contact resistance, small friction torque and the like, and is suitable for occasions with ultra-high power, such as manned space stations, solar space power stations and the like.
The prior retainer with a rolling ring structure adopts an idler wheel scheme, and adjacent flexible rings are spaced by the idler wheel. In order to support the idler wheel device, the inner ring is provided with a track structure fixedly connected with the inner ring, the flexible ring is in rolling contact with the idler wheel and the track, and the flexible ring and the idler wheel are required to be tightly connected in the circumferential direction to form a whole circle. Therefore, the flexible rings have high design, processing and manufacturing difficulty, low qualification rate and poor bearing capacity.
In order to reduce contact resistance, reduce heat generation and improve electrical transmission reliability, the number of the flexible rolling rings should be increased as much as possible. During the rotation work of the rolling ring, the plurality of flexible rings perform planetary rolling around the central shaft. Due to errors and sliding in the actual process, the flexible rings finally collide and interfere with each other in the continuous operation process to cause serious abrasion. The retainer needs to be designed to fix the interval.
At present, different spacing schemes are provided for rolling ring retainers of NASA, domestic eight houses, five houses and other units. But has the problems of poor manufacturability, heavy weight and the like.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the conductive rolling ring for the electric transmission rotary joint is provided, and the problems of support of the retainer, rigidity of the retainer, manufacturability and the like are solved while the roller interval is realized.
The technical scheme includes that the conductive rolling ring for the electric transmission rotary joint comprises an inner ring, an outer ring, a retainer and 2L flexible rings, wherein L is greater than or equal to 1.
The position that outer loop and inner ring circumference are relative includes two parallel raceways, and L flexible rings of equipartition in every raceway inner circumference, L flexible rings are located between inner ring and the outer loop under the support of retainer for realize the electric intercommunication between inner ring and the outer loop, and the inner ring has still opened the third raceway, marks as the support raceway, is located between two flexible ring raceways, still is equipped with L support bearings on the retainer, support bearing inner race adopts the round pin hub fixation on the retainer structure, and support bearing outer race fixes in the corresponding support raceway of rolling ring inner ring for support retainer self structure is in axial and radial positioning, keeps independently with the flexible ring in these two directions.
The retainer is a special-shaped annular structure, the annular structure alternately forms L-groove structures in opposite directions at intervals of an arc section along the axial direction, and L support bearing inner rings are respectively fixed on the L retainer groove structures by pin shafts.
Preferably, the conductive roller of the electric transmission rotary joint further comprises 2L spacing bearings, the spacing bearings are respectively and fixedly mounted on an arc section between the two opposite-direction groove structures and used for limiting the peripheral direction of the outer flexible rings from rolling randomly, in the rotating work of the roller ring, the plurality of flexible rings roll around the central shaft in a planetary manner, the revolution speeds of the plurality of flexible rings in the same roller path are not completely consistent, the outer ring of the spacing bearing is pushed by the inner side of the flexible ring which rotates fast, the inner side of the flexible ring which rotates slow is pushed by the outer ring of the spacing bearing, and the spacing effect of the flexible rings is realized through the interaction of the sides, so that the serious abrasion caused by the mutual collision of the flexible rings in the same roller path is.
Preferably, the dimension and position of the spacing bearing on the same raceway of the conductive rolling ring in the width direction of the flexible ring are the same as those in the width direction of the flexible ring.
And leading-out wires are arranged on the outer ring and the inner ring and are made of rigid copper bar outer sleeve insulating sleeves.
The insulating sleeve is made of polyimide materials.
The rolling ring group comprises an annular groove which is axially arranged on the periphery of the outer ring, and the outer ring leading-out wire extends out from the annular groove of the outer ring in parallel to the axis of the outer ring.
An annular groove is axially formed in the inner periphery of the inner ring, and an inner ring outgoing line extends out from the inner ring annular groove in parallel to the inner ring axis.
The retainer is of an aluminum alloy rigid structure.
The support bearing is located at the center of the axial position of the retainer assembly.
Compared with the prior art, the invention has the beneficial effects that:
(1) the rolling ring is provided with three independent raceways, and the retainer supporting bearing raceway and the flexible roller raceway are separated and independent from each other, so that the bearing raceway is ensured not to influence the electric transmission raceway, and the reliability is improved.
(2) The axial special-shaped petal structure of the retainer enables the support bearings to be positioned on two sides of the retainer and on the same plane; the invention realizes the coplanarity of the mass center of the retainer structure and the spacing bearing structure and the support bearing, has compact integral structure and optimizes the structural bearing force.
(3) The invention adopts the rigid copper bar outgoing line and designs the insulating sleeve structure, thereby solving the problems of large heat generation, difficult heat dissipation, voltage resistance which does not meet the national military standard and the like in the transmission process of high voltage and ultrahigh power.
Drawings
FIG. 1 is a cross-sectional view of an electrical rolling ring according to an embodiment of the present invention;
FIG. 2 is a cage assembly configuration according to an embodiment of the present invention;
FIG. 3 is an enlarged partial cross-sectional view of a rolling ring according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples.
As shown in figure 1, the invention provides an electric conduction rolling ring for an electric transmission rotary joint, which is characterized by comprising an inner ring, an outer ring, a retainer and 2L flexible rings, wherein L is more than or equal to 1.
The position that outer loop and inner ring circumference are relative includes two parallel raceways, and L flexible rings of equipartition in every raceway inner circumference, L flexible rings are located between inner ring and the outer loop under the support of retainer for realize the electric intercommunication between inner ring and the outer loop, and the inner ring has still opened the third raceway, marks as the support raceway, is located between two flexible ring raceways, still is equipped with L support bearings on the retainer, support bearing inner race adopts the round pin hub fixation on the retainer structure, and support bearing outer race fixes in the corresponding support raceway of rolling ring inner ring for support inner retainer self structure is at axial and radial positioning, keeps independently with the flexible ring in these two directions.
The retainer is a special-shaped annular structure, the annular structure alternately forms L-groove structures in opposite directions at intervals of an arc section along the axial direction, and L support bearing inner rings are respectively fixed on the L retainer groove structures by pin shafts.
Preferably, the conductive rolling ring for the electric transmission rotary joint further comprises 2L spacing bearings, the spacing bearings are fixedly mounted on arc sections between the groove structures in the two opposite directions respectively, the spacing bearings are used for limiting the peripheral direction of the outer flexible ring from rolling randomly, during the rotation work of the rolling ring, a plurality of flexible rings roll around the central shaft in a planetary mode, the revolution speeds of the plurality of flexible rings in the same raceway are not completely consistent, the inner side of the flexible ring which rotates fast pushes the outer ring of the spacing bearing, the inner side of the flexible ring which rotates slow is pushed by the outer ring of the spacing bearing, and the spacing effect of the flexible rings is realized through the interaction of the sides, so that the serious abrasion caused by the mutual collision of the flexible rings in the same raceway is prevented.
Preferably, the outer ring outgoing line and the inner ring outgoing line are both made of rigid copper bar outer sleeve insulating sleeves. The conductor structure can be customized according to product layout, and the single rigid copper bar has a larger sectional area than a conventional conductor of a lead wire, so that the resistance of the lead-out wire is reduced, and the heating is reduced; the insulating sleeve is made of polyimide materials, so that the insulating strength is high, and high-voltage application is convenient to realize.
The outer ring outgoing lines of the M rolling rings are uniformly distributed on the outer side of the rolling ring assembly in the circumferential direction.
The inner periphery of the inner ring is provided with an annular groove along the axial direction, the inner ring outgoing lines extend out from the inner ring annular groove in parallel to the inner ring axis, and the inner ring outgoing lines of the M rolling rings are uniformly distributed on the inner side of the rolling ring assembly in the circumferential direction. The outgoing lines distributed circumferentially reduce the concentration of wire harnesses and increase the heat dissipation area.
Preferably, heat conduction insulating ring glue can be filled in the annular grooves of the outer ring and the inner ring, so that the insulating property between the wires is further enhanced, the annular grooves can be used as auxiliary supports of the outgoing lines, and the mechanical resistance is improved.
The flexible ring is adopted between the rotating part and the fixed part of the rolling ring to realize current and power transmission. In order to reduce contact resistance, reduce heat generation and improve electrical transmission reliability, the number of the flexible rolling rings should be increased as much as possible. During the rotation work of the rolling ring, the plurality of flexible rings perform planetary rolling around the central shaft. Due to errors and sliding in the actual process, the flexible rings finally collide and interfere with each other in the continuous operation process to cause serious abrasion. The retainer needs to be designed to fix the interval.
The novel metal retainer separates the flexible rollers and supports the retainer and the flexible ring by adopting miniature bearings with different specifications. The retainer adopts the special-shaped annular structure in the circumferential direction, the stress is uniform, the thickness of the ring body is reduced, and the weight of the whole machine is effectively reduced. The support bearing realizes that the retainer is fixed and supported, and under the severe mechanical environment such as vibration impact, the inertial force of the retainer is transmitted to the inner ring of the rolling ring through the support bearing, so that the flexible ring is protected from being stressed.
The size and the position of the spacing bearing on the same raceway in the width direction of the flexible ring are the same as those in the width direction of the flexible ring. During actual work, the rolling rings rotate continuously, and the revolution speeds of a plurality of flexible rings in the same raceway are not completely consistent; the inner side of the flexible ring which rotates fast pushes the outer ring of the interval bearing, the inner side of the flexible ring which rotates slow is pushed by the outer ring of the interval bearing, and the interval effect of the flexible rings is realized through the interaction of the sides, so that the serious abrasion caused by the mutual collision of the flexible rings in the same roller path is prevented.
In one embodiment of the invention, each roller ring comprises 12 flexible rings, 12 spacer bearings and 6 support bearings. 6 flexible rings are uniformly arranged on the inner circumference of each roller path, 12 spacing bearings are respectively positioned on two sides of the retainer, two spacing bearings are in a group, the inner ring is fixed on two sides of the retainer by a pin shaft, the outer ring is in a free state, and 6 supporting bearings are positioned in the center of the width direction, so that the center of mass of the retainer assembly is positioned in the center of the width direction and is coplanar with the supporting bearings, and the mechanical property is improved.
The novel flexible roller spacing device is designed on the rolling ring, so that the problems of support of the retainer, rigidity of the retainer, manufacturability and the like are solved while the spacing of the rollers is realized.
(1) Integral structure of retainer
The functional principle is as follows: the retainer adopts an aluminum alloy rigid structure, and a pin used for installing a supporting bearing on the retainer penetrates into the flexible ring. When the flexible roller is far away from the balance position, the spacing function of the flexible roller is realized.
Structural layout: in order to fully utilize the retainer and increase the number of the flexible rings as much as possible, the spacing bearings are positioned on two sides of the retainer to simultaneously support two rows of flexible rollers.
Micro-bearing: in order to reduce the sliding friction between the spacing pin and the inner wall of the flexible roller, the pin is sleeved with the miniature bearing, so that the resistance moment is reduced, and the reliability is improved.
(2) Cage support bearing
Because the retainer adopts a rigid aluminum alloy structure, the rigidity and the strength of the flexible roller are weaker. The support device is required to be arranged separately to fix and support the retainer. As shown in fig. 2, the bearing structure is designed to fix and support the shaft holder.
The structure of the retainer is optimized, and the design goal is realized: 1) the retainer support bearing and the flexible roller are distributed circumferentially in radial approximate size, so that the radial volume of the structure is reduced, and a large hollow structure of the whole machine is realized; 2) the axial special-shaped petal structure of the retainer enables the support bearings to be positioned on two sides of the retainer and to be positioned on the same plane; 3) the center of mass of the retainer structure and the spacing bearing structure is coplanar with the support bearing. The whole structure is compact, and the structural bearing force is optimized.
(3) Raceway design
The race ring body raceway is designed as shown in fig. 3. The retainer supports the bearing raceway and the flexible roller raceway to separate, so that the bearing raceway is ensured not to influence the electric transmission raceway, and the reliability is improved.
The invention is applied to MW-level conductive rotary joints according to an on-orbit verification task for a space power station, and meets the requirements of ultra-large transmission power, ultra-high working voltage of 5000V, large-torque drive and high structural rigidity strength.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. An electrically conductive rolling ring for an electrically transmitted rotary joint, characterized by comprising an inner ring, an outer ring, a cage and 2L flexible rings, L being equal to or greater than 1;
the position that outer loop and inner ring circumference are relative includes two parallel raceways, and L flexible rings of equipartition in every raceway inner circumference, L flexible rings are located between inner ring and the outer loop under the support of retainer for realize the electric intercommunication between inner ring and the outer loop, and the inner ring has still opened the third raceway, marks as the support raceway, is located between two flexible ring raceways, still is equipped with L support bearings on the retainer, support bearing inner race adopts the round pin hub fixation on the retainer structure, and support bearing outer race fixes in the corresponding support raceway of rolling ring inner ring for support retainer self structure is in axial and radial positioning, keeps independently with the flexible ring in these two directions.
2. The electrically conductive rolling ring for an electrical transmission rotary joint as claimed in claim 1, wherein said cage is a profiled ring structure, the ring structure is formed by alternately forming L groove structures in opposite directions along every other arc segment along the axial direction, L support bearing inner rings are respectively fixed on L cage groove structures by pins.
3. The electric conduction rolling ring for the electric transmission rotary joint as claimed in claim 2, further comprising 2L spacing bearings, wherein the spacing bearings are respectively and fixedly mounted on the arc sections between the two opposite groove structures for limiting the outer flexible rings from freely rolling in the circumferential direction, during the rotation of the rolling ring, the plurality of flexible rings perform planetary rolling around the central shaft, the revolution speeds of the plurality of flexible rings in the same raceway are not completely consistent, the inner side of the flexible ring which rotates fast pushes the outer ring of the spacing bearing, the inner side of the flexible ring which rotates slow is pushed by the outer ring of the spacing bearing, and the spacing effect of the flexible rings is realized through the interaction of the sides, so that the severe abrasion caused by the collision of the flexible rings in the same raceway is prevented.
4. An electrical transmission rotary joint according to claim 3, wherein the spacer bearings on the same raceway are the same size and location in the width direction of the compliant ring.
5. The electric conduction rolling ring for the electric transmission rotary joint according to any one of claims 1 to 4, characterized in that the outer ring and the inner ring are provided with lead wires, and the lead wires are made of rigid copper bars sleeved with insulating sleeves.
6. The electrically conductive roller ring for an electrical transmission rotary joint of claim 5 wherein said insulative sleeve is made of a polyimide material.
7. The electrically conductive rolling ring for an electrically conveyed rotary joint according to claim 5, wherein the rolling ring set comprises an outer ring having an annular groove formed in an outer circumference thereof in an axial direction, and outer ring lead wires extending from the annular groove of the outer ring in parallel with an outer ring axis.
8. The electrically conductive rolling ring for an electrically transmitted rotary joint according to claim 5, wherein the inner circumference of the inner ring is provided with an annular groove in the axial direction, and the inner ring lead-out wire extends from the annular groove of the inner ring in parallel with the inner ring axis.
9. The electrically conductive rolling ring for an electrical transmission rotary joint according to any one of claims 1 to 8, wherein said cage is an aluminum alloy rigid structure.
10. The electrically conductive roller ring for an electrically transmitted rotary joint according to claim 2, wherein said support bearing is centered on the axial position of the cage assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010247251.5A CN111478140B (en) | 2020-03-31 | 2020-03-31 | A electrically conductive rolling ring for electricity transmission rotary joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010247251.5A CN111478140B (en) | 2020-03-31 | 2020-03-31 | A electrically conductive rolling ring for electricity transmission rotary joint |
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| CN111478140A true CN111478140A (en) | 2020-07-31 |
| CN111478140B CN111478140B (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010247251.5A Active CN111478140B (en) | 2020-03-31 | 2020-03-31 | A electrically conductive rolling ring for electricity transmission rotary joint |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112829592A (en) * | 2021-02-03 | 2021-05-25 | 河南科技大学 | Rolling current collecting device and current collecting assembly |
| CN112928568A (en) * | 2021-02-07 | 2021-06-08 | 河南科技大学 | Rotary conductive device |
| CN113594819A (en) * | 2021-05-28 | 2021-11-02 | 上海宇航***工程研究所 | Rolling ring structure with motion adaptivity |
| CN114122849A (en) * | 2021-11-25 | 2022-03-01 | 江苏科技大学 | Ball disc type rotating conductive device and quality detection method thereof |
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| CN110323648A (en) * | 2019-06-03 | 2019-10-11 | 大连理工大学 | A kind of roller collector machine |
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| GB190920356A (en) * | 1909-09-06 | 1910-05-26 | Lewis Henry Ransome | Improvements in Ball Bearings. |
| FR2229153A1 (en) * | 1973-05-11 | 1974-12-06 | Wirmsberger Gerhard | |
| SU892544A1 (en) * | 1980-01-04 | 1981-12-23 | Предприятие П/Я А-1348 | Current-collecting device for electric connection of rotating part to housting |
| SU930453A2 (en) * | 1980-06-27 | 1982-05-23 | Предприятие П/Я Г-4213 | Current collecting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112829592A (en) * | 2021-02-03 | 2021-05-25 | 河南科技大学 | Rolling current collecting device and current collecting assembly |
| CN112928568A (en) * | 2021-02-07 | 2021-06-08 | 河南科技大学 | Rotary conductive device |
| CN113594819A (en) * | 2021-05-28 | 2021-11-02 | 上海宇航***工程研究所 | Rolling ring structure with motion adaptivity |
| CN114122849A (en) * | 2021-11-25 | 2022-03-01 | 江苏科技大学 | Ball disc type rotating conductive device and quality detection method thereof |
| CN114122849B (en) * | 2021-11-25 | 2024-04-19 | 江苏科技大学 | Ball-disc type rotary conductive device and quality detection method thereof |
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| CN111478140B (en) | 2021-06-11 |
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