CN114122849A - Ball disc type rotating conductive device and quality detection method thereof - Google Patents
Ball disc type rotating conductive device and quality detection method thereof Download PDFInfo
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- CN114122849A CN114122849A CN202111413698.6A CN202111413698A CN114122849A CN 114122849 A CN114122849 A CN 114122849A CN 202111413698 A CN202111413698 A CN 202111413698A CN 114122849 A CN114122849 A CN 114122849A
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
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- 229920000049 Carbon (fiber) Polymers 0.000 claims description 8
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910021389 graphene Inorganic materials 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 4
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000008054 signal transmission Effects 0.000 abstract description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
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- 230000007774 longterm Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
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- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
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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
- H01R39/64—Devices for uninterrupted current collection
- H01R39/643—Devices for uninterrupted current collection through ball or roller bearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses a spherical disc type rotary conductive device and a quality detection method thereof. The invention belongs to the technical field of conductive devices (current transmission), and comprises an upper disc, a lower disc, an upper flexible conductive layer track, a lower flexible conductive layer track, a rolling ball and a retainer. The upper disc and the lower disc are provided with corresponding upper flexible conducting layer tracks and lower flexible conducting layer tracks, so that rolling conditions are provided for the rolling balls, meanwhile, the current and signal transmission of the mechanism connected with the upper disc and the lower disc is realized, and each flexible conducting layer track is provided with a leading-out wire respectively to be connected with other components. The retainer is divided into an upper part and a lower part which are connected by a screw, and the rolling ball hole is used for placing the rolling ball. The pattern of the cage determines the number and relative positions of the balls in each track. The upper disc, the lower disc and the retainer are fixedly connected through the connecting shaft, the upper bearing, the lower bearing and the snap ring, so that the stability of the rolling ball in the axial direction and the radial direction of the conductive rolling ring is ensured.
Description
Technical Field
The invention belongs to the technical field of conductive devices (current transmission), particularly relates to the field of current transmission among relative rotating parts, and particularly relates to a design and quality detection method of a spherical disc type rotating conductive device.
Background
The rotary conductive device is generally used for connecting two mechanisms which rotate relatively, and realizes the transmission of current and signals between the mechanisms, and simultaneously prevents the winding of a line caused by direct connection. In the prior art, a conductive slip ring is used as a common rotary conductive device and is often used in the fields of aerospace, wind power generation, military and the like. The requirements on the precision, the reliability, the service life and the like of the conductive slip ring are higher. In actual working occasions, the brush wires of the slip ring are in dynamic sliding electrical contact with the annular structure, so that coupling effects of various factors such as friction, electricity and heat exist, abrasion of the slip ring is aggravated, and the use performance of the slip ring is reduced. In long-term work, the traditional conducting slip ring brush wire is easy to deform, age and the like. Meanwhile, once the contact surface of the brush wire and the annular structure is damaged, the contact is unstable, electric arcs are generated, and the abrasion is further accelerated.
Patent publication No. CN112838455A entitled "conducting slip ring brush wire structure and conducting slip ring" provides a conducting slip ring brush wire structure, which fixedly connects a plurality of brush wires in each mounting hole of a brush holder together, and avoids the problems of stacking and splitting of the plurality of brush wires. However, in the brush structure, the plurality of contacts of the plurality of brush wires in each mounting hole interfere with each other, and thus, phenomena such as severe current fluctuation and arc discharge caused by unstable contact are easily generated in the actual operation process.
In the patent of the conductive slip ring brush wire structure and the conductive slip ring with the publication number of CN109378665A, a plurality of brush wires are contacted with a single ring piece, so that the stability of signal transmission of the conductive slip ring is improved, and the service life of the conductive slip ring is prolonged. However, the device still relies on the sliding contact between the brush filaments and the ring plate, and the problems of easy deformation of the brush filaments and unstable contact in long-term operation cannot be essentially solved.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention aims to provide a ball disc type rotary conductive device and a quality detection method thereof.
The technical scheme is as follows: the invention relates to a spherical disc type rotary conductive device;
the flexible conductive layer track comprises an upper disc (1) and a lower disc (2) which are opposite, wherein a plurality of semicircular grooves I are uniformly distributed on one side of the upper disc (1) close to the lower disc (2), and adaptive upper flexible conductive layer tracks (3) are arranged in the semicircular grooves I;
and a semicircular groove II corresponding to the semicircular groove I is uniformly distributed on one side of the lower disc (2) close to the upper disc (1), and a lower flexible conductive layer track (4) matched with the semicircular groove II is arranged in the semicircular groove II.
Furthermore, a ball groove is formed between the first semicircular groove and the second semicircular groove, and a rolling ball (5) is arranged in the ball groove.
Furthermore, a retainer (9) is arranged between the upper disc (1) and the lower disc (2), and the retainer (9) is divided into an upper part and a lower part which are connected by screws;
the retainer (9) is provided with a rolling ball hole matched with the rolling ball (5).
Furthermore, shaft holes are arranged at the center positions of the upper disc (1), the lower disc (2) and the retainer (9), a connecting shaft (6) is arranged in the shaft holes,
an upper bearing (8) and a lower bearing (7) for fixing the connecting shaft (6) are respectively arranged outside the connecting shaft (6);
the upper bearing (8) is arranged between the connecting shaft (6) and the retainer (9),
the connecting shaft (6) is connected with the retainer (9) through an upper bearing (8) and a clamping ring for fixing the upper bearing (8) and is supported;
the lower bearing (7) is arranged between the connecting shaft (6) and the lower disc (2),
the connecting shaft (6) is connected with the lower disc (2) through a lower bearing (7) and a clamping ring for fixing the lower bearing (7) for supporting.
Furthermore, lead wires (10) for connecting other components are arranged on the upper flexible conductive layer track (3) and the lower flexible conductive layer track (4).
Furthermore, the upper disc (1) is connected with a static mechanism, and the lower disc (2) is connected with a rotary mechanism.
Furthermore, the upper flexible conducting layer track (3) and the lower flexible conducting layer track (4) are both made of graphene and copper composite materials;
the rolling ball (5) is made of carbon fiber reinforced copper/platinum composite material;
the retainer (9) is made of polytetrafluoroethylene material;
the lead wire (10) is made of copper, and the lead wire (10) is wrapped outside the lead wire (10) by an insulating sleeve.
Further, a quality detection method of the spherical disc type rotary conductive device comprises the following steps:
(8.1) sequentially connecting the leading line (10) of the upper disc (1) to the leading line (10) of the next lower disc (2) from inside to outside from the innermost ring of the device so that all the loops of the device are connected in series, and checking whether the circuit is electrified normally after the power supply is switched on; if the circuit can not be normally connected, at least one group of loops has problems, and the outgoing line (10), the rolling ball (5), the track and the contact problems of each loop need to be checked one by one;
(8.2) leading instantaneous large current into each loop of the device, and detecting the temperature of each loop by using a thermal infrared imager;
(8.3) after the device is installed, switching on a power supply, and calculating the contact resistance of each loop according to the voltage and current values of each loop so as to detect the stability of each loop;
comparing whether each loop has deviation with the theoretical contact resistance value;
(8.4) positioning a pressure sensing paper against each loop conductive layer track according to the dimensions of the device track, and inspecting the trace of the pressure sensing paper to determine whether the rolling ball (5) is in normal contact with the track; when the pressure sensing paper is pressed, a red area appears on the film, and the color density is different along with the change of the pressure; therefore, the pressure and the distribution between the rolling ball (5) and the track can be accurately judged by sensing the area and the color depth of the trace on the paper pressing film;
if the area and the color depth of each contact trace of the pressure-sensitive paper film are similar, the manufacturing and the installation of the device meet the precision requirement; if the manufacture and installation of the device do not meet the requirement of precision, the position with problems can be quickly positioned by comparing the contact traces of the films;
(8.5) connecting the device with two mechanisms rotating relatively, and detecting the fluctuation of the contact resistance of each loop of the device in the rotating process; the fluctuation of the contact resistance is small, which represents that the quality of the device is good; if the contact resistance fluctuates greatly in the operation process, the contact between the rolling ball (5) and the track is unstable due to problems of installation or manufacturing precision and the like.
Has the advantages that: compared with the prior art, the invention has the characteristics that 1, the contact points are increased by utilizing the mode that the rolling balls are contacted with the tracks of the upper and lower discs, the influence on the whole conductivity caused by poor contact of a certain point in the operation process is avoided, and the stability and the reliability are increased; meanwhile, sliding friction is converted into rolling friction, the friction coefficient is reduced from 0.3-0.6 to 0.03-0.05, the friction and the abrasion are reduced, and the service life of the device is prolonged; 2. the upper disc, the lower disc and the retainer are fixed through the bearing and the snap ring, so that the stability of the rolling ball in the axial direction and the radial direction of the conductive rolling ring is ensured, the conductive rolling ring is convenient to install and manufacture, and the conductive rolling ring has higher manufacturability and reliability; 3. the invention can change the contact area between the track and the rolling ball and design the style of the retainer according to the current required by the actual working condition, and adjust the current of each loop of the whole device and the local device; the style of the retainer meets the requirement of the current value required by each loop by increasing or reducing the number of the rolling balls of each loop; meanwhile, the retainer and the flexible conducting layer track ensure the relative positions between the tracks and between the rolling balls of the same track without mutual interference; 4. the upper and lower flexible conducting layer tracks are made of graphene and copper composite materials and have good conductivity and toughness, so that the rolling balls and the upper and lower flexible conducting layer tracks keep initial deformation during installation, the contact reliability is ensured, the generation of electric arcs is inhibited, and the stability of signal and current transmission is ensured; 5. the rolling ball is a carbon fiber reinforced copper/platinum-based composite material and has good conductive performance, and the retainer is a polytetrafluoroethylene material and has good insulating performance; meanwhile, the wear resistance of the two materials is better. Thus, the safe reliability of the operation of the conductive rolling ring is ensured, and the service life of the conductive rolling ring is prolonged; 6. the quality detection method provided by the invention can effectively detect the problems of design, manufacture, installation quality and the like of the conductive device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a cage and balls of the present invention;
FIG. 3 is a schematic view of the upper tray of the present invention;
FIG. 4 is a schematic view of the lower plate of the present invention;
FIG. 5 is a schematic view of the multiple current loop cage of the present invention;
FIG. 6 is a flow chart of the operation of the present invention;
in the figure, 1 is an upper disc, 2 is a lower disc, 3 is an upper flexible conductive layer track, 4 is a lower flexible conductive layer track, 5 is a rolling ball, 6 is a connecting shaft, 7 is a lower bearing, 8 is an upper bearing, 9 is a retainer, and 10 is a leading-out wire.
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
The invention relates to a spherical disc type rotary conductive device;
the flexible conductive layer track comprises an upper disc 1 and a lower disc 2 which are opposite, wherein a plurality of semicircular grooves I are uniformly distributed on one side of the upper disc 1, which is close to the lower disc 2, and an upper flexible conductive layer track 3 which is matched with the semicircular grooves I is arranged in the semicircular grooves I;
and a semicircular groove II corresponding to the semicircular groove I is uniformly distributed on one side of the lower disc 2 close to the upper disc 1, and a lower flexible conductive layer track 4 matched with the semicircular groove II is arranged in the semicircular groove II.
Furthermore, a ball groove is formed between the first semicircular groove and the second semicircular groove, and a rolling ball 5 is arranged in the ball groove.
Further, a retainer 9 is arranged between the upper disc 1 and the lower disc 2, and the retainer 9 is divided into an upper part and a lower part which are connected by screws;
the retainer 9 is provided with a rolling ball hole matched with the rolling ball 5.
Furthermore, the center positions of the upper plate 1, the lower plate 2 and the retainer 9 are provided with shaft holes, a connecting shaft 6 is arranged in the shaft holes,
an upper bearing 8 and a lower bearing 7 for fixing the connecting shaft 6 are respectively arranged outside the connecting shaft 6;
the upper bearing 8 is disposed between the connecting shaft 6 and the holder 9,
the connecting shaft 6 is connected with the retainer 9 through an upper bearing 8 and a clamping ring for fixing the upper bearing 8;
the lower bearing 7 is arranged between the connecting shaft 6 and the lower disc 2,
the connecting shaft 6 is connected with the lower disc 2 through a lower bearing 7 and a clamping ring for fixing the lower bearing 7, and the lower disc is supported.
Furthermore, lead wires 10 for connecting other components are provided on both the upper flexible conductive layer track 3 and the lower flexible conductive layer track 4.
Further, the upper disc 1 is connected with a static mechanism, and the lower disc 2 is connected with a rotating mechanism.
Further, the upper flexible conducting layer track 3 and the lower flexible conducting layer track 4 are both made of graphene and copper composite materials;
the rolling ball 5 is made of carbon fiber reinforced copper/platinum composite material;
the retainer 9 is made of polytetrafluoroethylene material;
the lead-out wire 10 is made of copper, and the lead-out wire 10 is wrapped outside the lead-out wire 10 by an insulating sleeve.
Specifically, the spherical disc type rotary conductive device mainly comprises an upper disc 1, a lower disc 2, an upper flexible conductive layer track 3, a lower flexible conductive layer track 4, a rolling ball 5 and a retainer 9;
the upper disc 1 and the lower disc 2 are provided with corresponding upper flexible conducting layer tracks 3 and lower flexible conducting layer tracks 4, so that rolling conditions are provided for the rolling balls 5, meanwhile, the current and signal transmission of mechanisms connected with the upper disc 1 and the lower disc 2 is realized, and each flexible conducting layer track is respectively provided with an outgoing line 10 to be connected with other components;
the retainer 9 is divided into an upper part and a lower part which are connected by a screw, and a rolling ball hole is used for placing the rolling ball 5;
the number and relative position of the rolling balls 5 of each track are determined by the style of the retainer 9; the upper disc 1, the lower disc 2 and the retainer 9 are fixedly connected through the connecting shaft 6, the upper bearing 8, the lower bearing 7 and the snap ring, so that the stability of the rolling ball 5 in the axial direction and the radial direction of the conductive rolling ring is ensured.
Preferably, the upper plate 1 is connected to a stationary mechanism and the lower plate 2 is connected to a rotating mechanism.
Preferably, the upper end of the connecting shaft 6 is provided with two clamping grooves, and the connecting shaft 6 is connected and fixed with the upper disc 1 through a clamping ring; meanwhile, the fixing positions of the clamping ring and the upper clamping groove and the lower clamping groove can adjust the pressure between the track and the ball and change the actual contact area between the track and the ball, so that the overall current of the device is changed; when the snap ring was put at last draw-in groove promptly, track and ball area of contact are less, are applicable to the condition of undercurrent, and the ring was put at last draw-in groove, and track and ball area of contact are great, are applicable to the condition of heavy current.
Preferably, the connecting shaft 6 and the retainer 9 are connected and supported by using a snap ring and an upper bearing 8, the connecting shaft 6 and the lower disc 2 are connected and supported by using a snap ring and a lower bearing 7, and the bottom of the connecting shaft 6 is fixedly connected with the connecting shaft 6 and the lower disc 2 by using a snap ring.
Preferably, the cage 9 is designed into a constant current or multi-current loop cage 9 according to the current required by the actual working condition, and the number of the rolling balls of each loop is changed within a certain range to adjust the size of the contact resistance, so that the current of each loop is satisfied; the current between each loop is related to the number of balls 5 as follows:
wherein, InCurrent of the n-th loop from inside to outside, ZnThe number of rolling balls of the n-th loop from inside to outside.
The holder 9 adjusts the current level of each local loop, unlike the above-mentioned snap ring which adjusts the overall current level of the device at different positions of the upper and lower snap grooves.
Preferably, the rolling ball 5 is a carbon fiber reinforced copper/platinum-based composite material, wherein the carbon fiber has the characteristics of friction resistance, electric conduction, heat conduction, corrosion resistance and the like, the specific gravity of the carbon fiber is small, and the platinum has better electric conduction and heat resistance, and simultaneously has chemical stability far higher than that of noble metal materials such as silver and the like, so that the platinum is not easy to oxidize. Therefore, the device adopts the rolling ball 5 with excellent conductivity, wear resistance, heat resistance and chemical stability; the manufacturing method of the rolling ball 5 comprises the steps of preparing carbon fiber, copper powder and platinum powder according to the volume fractions of 10%, 70% and 20%, fully and uniformly mixing the prepared powder by using a ball mill, extruding the mixture into a ball body by using a tablet press, and polishing the surface of the ball body after high-temperature sintering heat treatment so as to further reduce the roughness of the surface.
Preferably, the flexible conducting layer track is made of a composite material of graphene and copper, has good conductivity and toughness, ensures the stability of normal motion and transmission of the rolling ball 5 when the upper and lower flexible conducting layer tracks are in close contact with the rolling ball, and avoids the damage of a spherical surface or a track caused by the over-tight contact of the conducting layer track and the rolling ball 5.
Preferably, the retainer 9 is made of polytetrafluoroethylene material, has excellent heat resistance and insulator properties, has an extremely low friction coefficient, and has a self-lubricating effect.
Aiming at the designed spherical disc type rotating conductive device, the quality detection method of the device comprises the following steps:
s1, from the innermost ring of the device, the leading-out wire 10 of the upper disc 1 is sequentially connected with the leading-out wire of the next lower disc 2 from inside to outside, all the loops of the device are connected in series, and after the power supply is switched on, whether the circuit is electrified normally is checked; if the circuit can not be normally connected, at least one group of loops has problems, and the problems of leading-out wires 10, rolling balls 5, tracks, contact and the like of each loop need to be checked one by one;
s2, introducing instantaneous heavy current into each loop of the device, and detecting the temperature of each loop by using a thermal infrared imager; if an abnormally high temperature occurs in a certain loop, the contact abnormality of the loop is indicated;
s3, after the device is installed, the power supply is switched on, and the contact resistance of each loop is calculated according to the voltage and current value of each loop so as to further detect the stability of each loop; comparing whether each loop has deviation with the theoretical contact resistance value, if the deviation of the contact resistance value of a certain loop is larger, the contact between the track of the loop and the rolling ball 5 is unstable;
s4, according to the size of the device track, arranging a sensing paper close to each loop conducting layer track, and checking the trace of the sensing paper to determine whether the rolling ball 5 is normally contacted with the track; when the pressure sensing paper is pressed, a red area appears on the film, and the color density is different along with the change of the pressure; therefore, the pressure between the rolling ball 5 and the track and the distribution condition can be accurately judged through the area and the color depth of the trace on the pressure sensing paper sheet; if the area and the color depth of each contact trace of the pressure-sensitive paper film are similar, the manufacturing and the installation of the device meet the precision requirement; if the device is manufactured and installed without the precision requirement, the position with problems can be quickly positioned by comparing the contact traces of the films.
S5, connecting the device with two mechanisms rotating relatively, and detecting the fluctuation of the contact resistance of each loop in the rotation process of the device; the fluctuation of the contact resistance is small, which represents that the quality of the device is good; if the contact resistance fluctuates greatly in the operation process, the contact between the rolling ball and the track is unstable due to problems of installation or manufacturing precision and the like.
The invention ensures the reliability of contact and reduces the vibration and friction in the operation process by slight deformation generated by the flexible contact of the rolling ball 5 and the track, and the device has smaller axial size and can simultaneously meet the current of a plurality of independent loops.
Examples
A ball disk type rotary conductive device comprises an upper disk 1, a lower disk 2, an upper flexible conductive layer track 3, a lower flexible conductive layer track 4, a rolling ball 5 and a retainer 9;
the invention is suitable for the transmission of current and signals between the rotating shaft and the static mechanism of the wind turbine generator.
The upper disc 1 and the lower disc 2 are provided with corresponding upper flexible conducting layer tracks 3 and lower flexible conducting layer tracks 4, so that rolling conditions are provided for the rolling balls 5, meanwhile, the current and signal transmission of mechanisms connected with the upper disc 1 and the lower disc 2 is realized, and each flexible conducting layer track is respectively provided with an outgoing line 10 to be connected with other components;
the retainer 9 is divided into an upper part and a lower part which are connected by a screw, and a rolling ball hole is used for placing the rolling ball 5;
the number and relative position of the rolling balls 5 of each track are determined by the style of the retainer 9; the upper disc 1, the lower disc 2 and the retainer 9 are fixedly connected through the connecting shaft 6, the upper bearing 8, the lower bearing 7 and the snap ring, so that the stability of the rolling ball 5 in the axial direction and the radial direction of the conductive rolling ring is ensured.
In the embodiment, an upper disc 1 is arranged on a fixed electric control cabinet of a wind turbine generator, and a lower disc 2 is connected with the low-speed shaft end of a fan gear box or the center of a hub; in actual operation, the lower disc 2 rotates along with blades of the generator set, and the rolling balls 5 transmit current and signals between the upper flexible conductive layer track and the lower flexible conductive layer track through rolling.
The upper end of the connecting shaft 6 is provided with two clamping grooves, and the connecting shaft 6 is connected and fixed with the upper disc 1 through a clamping ring; meanwhile, the fixing positions of the clamping ring and the upper clamping groove and the lower clamping groove can adjust the pressure between the track and the ball and change the actual contact area between the track and the ball, so that the overall current of the device is changed; according to the current generated by the wind power of a specific use site, a proper clamping groove position is selected, namely when the wind power is small, the clamping ring is arranged at the upper clamping groove position, the contact area between the track and the ball is small, and the clamping groove is suitable for the condition of small current; when wind power is large, the clamping ring is installed in the lower clamping groove, the contact area between the track and the ball is large, and the clamping device is suitable for the condition of large current.
The connecting shaft 6 and the retainer 9 are connected and supported by using a snap ring and an upper bearing 8, the connecting shaft 6 and the lower disc 2 are connected and supported by using a snap ring and a lower bearing 7, and the bottom of the connecting shaft 6 is fixedly connected with the connecting shaft 6 and the lower disc 2 by using the snap ring.
The retainer 9 determines the required current according to the specific working conditions such as wind speed, wind power and the like, designs the equal-current or multi-current loop retainer 9, and adjusts the contact resistance by changing the number of the rolling balls of each loop within a certain range, thereby meeting the current of each loop.
The holder 9 adjusts the current level of each local loop, unlike the above-mentioned snap ring which adjusts the overall current level of the device at different positions of the upper and lower snap grooves.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (8)
1. A ball disk type rotary conductive device is characterized in that;
the flexible conductive layer track comprises an upper disc (1) and a lower disc (2) which are opposite, wherein a plurality of semicircular grooves I are uniformly distributed on one side of the upper disc (1) close to the lower disc (2), and adaptive upper flexible conductive layer tracks (3) are arranged in the semicircular grooves I;
and a semicircular groove II corresponding to the semicircular groove I is uniformly distributed on one side of the lower disc (2) close to the upper disc (1), and a lower flexible conductive layer track (4) matched with the semicircular groove II is arranged in the semicircular groove II.
2. The ball-and-socket rotary electrical conductor of claim 1, wherein;
a ball groove is formed between the first semicircular groove and the second semicircular groove, and a rolling ball (5) is arranged in the ball groove.
3. The ball-and-socket rotary electrical conductor of claim 1, wherein;
a retainer (9) is also arranged between the upper disc (1) and the lower disc (2), and the retainer (9) is divided into an upper part and a lower part which are connected by screws;
the retainer (9) is provided with a rolling ball hole matched with the rolling ball (5).
4. A ball-and-socket rotary electric conduction device as claimed in claims 1 and 3, wherein;
the center positions of the upper disc (1), the lower disc (2) and the retainer (9) are provided with shaft holes, a connecting shaft (6) is arranged in the shaft holes,
an upper bearing (8) and a lower bearing (7) for fixing the connecting shaft (6) are respectively arranged outside the connecting shaft (6);
the upper bearing (8) is arranged between the connecting shaft (6) and the retainer (9),
the connecting shaft (6) is connected with the retainer (9) through an upper bearing (8) and a clamping ring for fixing the upper bearing (8) and is supported;
the lower bearing (7) is arranged between the connecting shaft (6) and the lower disc (2),
the connecting shaft (6) is connected with the lower disc (2) through a lower bearing (7) and a clamping ring for fixing the lower bearing (7) for supporting.
5. The ball-and-socket rotary electrical conductor of claim 1, wherein;
lead-out wires (10) for connecting other components are arranged on the upper flexible conductive layer track (3) and the lower flexible conductive layer track (4).
6. The ball-and-socket rotary electrical conductor of claim 1, wherein;
the upper disc (1) is connected with a static mechanism, and the lower disc (2) is connected with a rotary mechanism.
7. The ball-and-socket rotary electric conduction device according to claims 1, 2, 3 and 5, wherein;
the upper flexible conducting layer track (3) and the lower flexible conducting layer track (4) are both made of graphene and copper composite materials;
the rolling ball (5) is made of carbon fiber reinforced copper/platinum composite material;
the retainer (9) is made of polytetrafluoroethylene materials.
8. The method for detecting the quality of the ball-disk-type rotating conductive device according to claims 1 to 6, comprising the steps of:
(8.1) sequentially connecting the leading line (10) of the upper disc (1) to the leading line (10) of the next lower disc (2) from inside to outside from the innermost ring of the device so that all the loops of the device are connected in series, and checking whether the circuit is electrified normally after the power supply is switched on; if the circuit can not be normally connected, at least one group of loops has problems, and the outgoing line (10), the rolling ball (5), the track and the contact problems of each loop need to be checked one by one;
(8.2) leading instantaneous large current into each loop of the device, and detecting the temperature of each loop by using a thermal infrared imager;
(8.3) after the device is installed, switching on a power supply, and calculating the contact resistance of each loop according to the voltage and current values of each loop so as to detect the stability of each loop;
comparing whether each loop has deviation with the theoretical contact resistance value;
(8.4) positioning a pressure sensing paper against each loop conductive layer track according to the dimensions of the device track, and inspecting the trace of the pressure sensing paper to determine whether the rolling ball (5) is in normal contact with the track; when the pressure sensing paper is pressed, a red area appears on the film, and the color density is different along with the change of the pressure; therefore, the pressure and the distribution between the rolling ball (5) and the track can be accurately judged by sensing the area and the color depth of the trace on the paper pressing film;
if the area and the color depth of each contact trace of the pressure-sensitive paper film are similar, the manufacturing and the installation of the device meet the precision requirement; if the manufacture and installation of the device do not meet the requirement of precision, the position with problems can be quickly positioned by comparing the contact traces of the films;
(8.5) connecting the device with two mechanisms rotating relatively, and detecting the fluctuation of the contact resistance of each loop of the device in the rotating process; the fluctuation of the contact resistance is small, which represents that the quality of the device is good; if the contact resistance fluctuates greatly in the operation process, the contact between the rolling ball (5) and the track is unstable due to problems of installation or manufacturing precision and the like.
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