1864results about "Connection contact member material" patented technology

A retention assembly for coupling electrical components to a vehicle including a body configured to house the electrical components, the body defining a slot. The retention assembly further includes a grounding component received in the slot of the body and defining a first aperture and a fastener extending through the first aperture of the grounding component and configured to extend at least partially through a vehicle body to secure the body to the vehicle and provide an electrical pathway between the grounding component and the vehicle body.

The utility model provides a spring-free type bushing end screen, which belongs to the technical field of bushing end screens and comprises a flange seat, an insulating sealing sleeve is embedded in an inner cavity of the flange seat and is clamped in the inner cavity of the flange seat through a locking component, and a locking thread is arranged at the end part, far away from the flange seat, of a binding post along the outer wall. The inner wall of the side, away from the flange hole, of the flange base is in threaded connection with a grounding piece, the grounding piece is arranged outside the locking thread in a sleeving mode, anti-skid lines are arranged on the outer wall of the grounding piece in the circumferential direction, external threads are formed in the bottom of the outer wall of the grounding piece in the circumferential direction, internal threads are formed in the top of the inner wall of the flange base, and therefore the grounding piece is in threaded connection with the top of an inner cavity of the flange base. After the grounding piece is in threaded connection with the flange seat, the end screen is in a continuous grounding state, stable operation of the transformer is guaranteed under the condition that overall stability is guaranteed, and the protection effect is enhanced.

The invention relates to a device (1) for contacting an electrical conductor (2), in particular a cable conductor of a power supply cable, comprising at least - a connecting body (3) that defines a receiving space (4) into which the conductor (2) to be contacted can be inserted with its end face (5), and - a contact medium (6) with a plurality of electrically conductive and adjacent contact bodies (7) introduced into the receiving space (4), with which the end face (5) of the conductor (2) can be electrically contacted. According to the invention, it is provided that the electrical conductor (2) can be fixed in the receiving space (4), wherein a contact surface (8) of the receiving space (4) facing the conductor (2) is designed in such a way that electrical contact between the connecting body (3) and the conductor (2) is optimized.

The invention relates to a shaft grounding device for deriving an inductively generated voltage, current or charge from a first machine element (5), preferably a shaft, into a second machine element (1), having a shaft grounding element (4, 50) for discharging, according to the invention, the shaft grounding element (4, 50) is a component separated from a starting material, preferably a continuous article, said component being penetrated by channels (16) in the longitudinal direction thereof or being provided with perforations and / or surface structures and / or surface textures at least on the contact surface thereof with the first machine element. The invention also relates to a method for manufacturing the shaft grounding device.

The utility model discloses a connecting structure of an aluminum-based bus duct with copper-clad end parts, and relates to the technical field of busbars. The copper-aluminum eutectic conducting bar comprises a copper-aluminum eutectic conducting bar body, the copper-aluminum eutectic conducting bar body comprises an aluminum alloy base body layer A, the end portions of the upper side face and the lower side face of the aluminum alloy base body layer A are covered with copper connecting layers A, and the copper-aluminum eutectic layer A is arranged between the aluminum alloy base body layer A and the copper connecting layers A. The copper-aluminum eutectic conducting bar further comprises a connector which comprises a plurality of copper-aluminum eutectic connecting pieces. The copper-aluminum eutectic conducting bar is clamped by the connector and tightly abuts against the copper-aluminum eutectic connecting piece. The beneficial effects of the utility model lie in that the utility model combines the advantages of low density and low cost of aluminum and the characteristics of high conductivity and corrosion resistance of copper, and only the end part of the aluminum substrate is coated with copper, so that the overall cost is reduced, the excellent performance of key parts is ensured, the perfect balance between the performance and the cost is realized, and the copper-aluminum eutectic technology is adopted. The problems that interface bonding is not firm, resistance is large, and corrosion is prone to occurring when aluminum and copper are directly connected are effectively solved.

The utility model discloses a grounding carbon brush and position sensor combination assembly for an automobile high-voltage driving motor, which comprises a main shell and is characterized in that the left end of the main shell is an external connector, a connector insert is arranged in the external connector, a plurality of bolt mounting holes are arranged at the edge of the main shell, the bolt mounting holes at the left end and the right end of the main shell are connected with a brush carrier, and the brush carrier is connected with a motor. A carbon brush assembly is arranged in the brush carrier, a circular groove is formed in the main shell, and a movable carbon brush protection plate is clamped in the circular groove. Certain electronic devices are arranged between the grounding carbon brush connecting shaft and the ground and used for reducing common-mode voltage on the shaft, and the devices and the eddy current sensor share one PCB. Before the carbon brush assembly is installed, the head of the carbon brush body is fixed in the brush box through the carbon brush protection plate, an operator does not need to make contact with the carbon brush body during installation, when the assembly is installed, a motor shell can press the carbon brush protection plate in place, the carbon brush body automatically pops out to make contact with a shaft, and the failure hidden danger caused by installation is avoided.

A discharge device for discharging electric currents from a rotor part of a machine, said rotor part having a shaft, the discharge device comprising an axially displaceable contact element, which is at least partly accommodated in a guide, for forming an electroconductive sliding contact between a sliding contact surface of the contact element and a shaft contact surface of the shaft, the sliding contact surface being provided for forming the sliding contact, the contact element being electroconductively connected to the guide and / or a retaining element of the machine, and the contact element being prestressed towards the shaft contact surface by means of a spring element, the contact element being at least partly wetted with an oily fluid, in particular at least in the area of its sliding contact surface.

A busbar connection body comprises a first busbar, a second busbar, a press mechanism and a regulating member. The first busbar has a first contact portion. The second busbar has a second contact portion. The press mechanism comprises a bolt, a first member and a second member. The first member has a pressing portion and a converting surface. The second member has a force application portion. The regulating member has a receiving portion. The force application portion presses the converting surface at least in a first direction when the bolt is fastened under a state where the second contact portion is positioned between the first contact portion and the receiving portion in an accommodation space. When the force application portion presses the converting surface, the pressing portion presses the first contact portion against the second contact portion in a second direction while the receiving portion receives the second contact portion.

Provided is a connector structure that is capable of inhibiting physical damage to a connection portion between a conductive layer and a wiring part, and is also capable of inhibiting electrical damage to the connection portion, and therefore, is suitable for functional fibers. When one surface 1a of a conductive layer 1 forms an XY plane defined by an X axis and a Y axis, a connector structure 10 is formed by connecting wiring part 2 to the one surface 1a in a Z-axis direction. In at least one cross-section that appears when a connection portion 3 is cut along the Z-axis direction, an internal angle θ that is located on the side of the wiring part 2 and that is formed by a virtual straight line L1 drawn by the one surface 1a and a virtual straight line L2 drawn by a surface of the wiring part 2 connected to the one surface 1a is greater than 90 degrees.

The invention provides a high-current pulse injection type contact resistance monitoring type grounding rod which comprises a glass steel pipe with one end sleeved with an insulating handle and the other end fixed with a hook, a groove is formed in the inner side wall of the hook, a conductive tongue and an insulating tongue which are arranged in a spaced mode are arranged on the inner side of the hook in a back-to-back mode, and placement grooves are formed in the inner sides of back arches of the conductive tongue and the insulating tongue. A piezoresistive sensor is arranged in the placement groove or the groove and connected with one elastic arm of a double-torsion spring located between the placement groove and the groove in a pressing mode, the other elastic arm of the double-torsion spring is pressed in the groove in the inner side of the hook or the placement groove, a bent groove is formed in the outer side of the back arch of the insulation tongue, and a copper plate is fixedly embedded in the bent groove. In a non-working state, the copper plate is not in contact with the conductive tongue, and a monitoring box is further arranged on the glass reinforced plastic pipe. The high-current pulse injection mode is adopted to monitor the contact resistance between the grounding rod hook and the conductor to be grounded, monitoring is more direct, and under mutual cooperation of contact pressure detection, contact state feedback is clear.

The invention relates to the technical field of ground wire automatic hanging and dismounting, in particular to a ground wire automatic hanging and dismounting device based on a different-direction double-clamping-jaw structure, and the device comprises a base and a ground conductive hook which is used for being hung on a three-phase wire, and the bottom end of the ground conductive hook is fixedly connected with a conductive seat. A plurality of insulating tubes which are sequentially arranged in the vertical direction are arranged below the conductive seat, the bottom end of the conductive seat is fixedly connected with the top end of the uppermost insulating tube, and every two adjacent insulating tubes are detachably connected through a dismounting part; a conductive sleeve matched with the conductive seat is arranged above the base, and the bottom end of the conductive sleeve is fixedly connected with a locking sleeve; an operator does not need to directly hang the ground wire on a three-phase lead through an insulating rod, the problem of manually lifting the ground wire does not need to be considered, the ground wire can be conveniently hung at a high position, the ground wire can be automatically hung by a single person without cooperation of multiple persons, and the labor intensity and danger are reduced.

The invention relates to an electrical contact arrangement (2) with - a contact component (4) made of a first material, in particular a conductor rail, with a first through-hole (16), - a contact element (6) which is electrically connected to the contact component (4), - with an intermediate element (8) made of a material different from the first material, which has a further, third through-hole (20) and which is materially connected to the contact component (4), wherein - the intermediate element (8) has a connecting collar (32) around the third through hole (20) on a bottom side (30), via which the intermediate element (8) is materially connected to the contact component (4) on its top side (40), and wherein - the connecting collar (32) is spaced radially from a hole edge (38) of the first through hole (16) of the contact component (4) by a distance (a), so that a storage space (42) for receiving material of the contact component (4) is formed.

The application belongs to the field of electric power equipment, and discloses a grounding wire self-locking device for electric power maintenance and an operating method. The device part comprises an operating rod, a locking assembly, a first reset spring, a ratchet assembly and a conductive drainage assembly. The locking assembly comprises a fixed part and a rotating part rotatably connected with the fixed part, and a cable clamping channel is formed between the fixed part and the rotating part. The first reset spring is in a closed state when the rotating part and the fixed part are in a free state. The ratchet assembly comprises a ratchet wheel and a pawl, and the ratchet wheel is fixed to one end of the rotating part close to the hinge shaft. The linkage unlocking assembly is fixedly connected with the operating rod and slidably connected with the fixed part. The output end of the linkage unlocking assembly is movably connected with the pawl, and is used for driving the pawl to rotate to realize locking or unlocking. The conductive drainage assembly is provided with a grounding wire connecting port. The application can improve the safety and efficiency of maintenance work, and the self-locking is reliable and convenient to disassemble and assemble. The application is suitable for cable maintenance of substations, overhead lines or other electric power equipment.

A contact assembly includes a contact element having a lead-through opening, a contact section extending in a tube-shaped manner along the lead-through opening and having a contact surface, and a collar section connected to the contact section and extending the lead-through opening in a sleeve-shaped manner, a busbar having a reception opening receiving the collar section, and a fastener inserted into the lead-through opening. The contact element has a first friction surface affixable with the busbar in the reception opening in a frictionally engaging manner and a second friction surface affixable in the reception opening with the busbar or in the lead-through opening with the fastener in a frictionally engaging manner. The first friction surface and the second friction surface are mutually offset in a radial direction with respect to the lead-through opening.

The invention discloses an aluminum-copper composite strip and a preparation method thereof, the strip comprises a copper alloy layer, an aluminum material layer and an intermetallic compound layer, the aluminum material layer is embedded in the copper alloy layer, the intermetallic compound layer is located between the copper alloy layer and the aluminum material layer, the copper alloy layer is a precipitation strengthening type copper-nickel alloy, and the intermetallic compound layer is an aluminum alloy layer. The average particle size of second-phase particles in the copper alloy layer is smaller than or equal to 20 nm, the intermetallic compound layer is composed of a first diffusion layer and a second diffusion layer which are stacked, the first diffusion layer contains a Cu9Al4 intermetallic compound, the second diffusion layer contains a CuAl2 intermetallic compound, and the thickness of the second diffusion layer is smaller than or equal to 2 microns. The preparation method of the strip comprises the technological processes of grooving, surface cleaning, composite rolling, intermediate annealing, cold rolling, annealing before forming, splitting and packaging. The strip achieves good matching of strength, conductivity, heat stress relaxation resistance and bending performance, and is suitable for occasions with high requirements for comprehensive performance of materials, such as automobile wire harness connecting terminals and the like.

The invention relates to the technical field of vehicles, in particular to a connector, a connector assembly and a vehicle. The second connecting conductor comprises at least two sub-connecting conductor pieces, and each sub-connecting conductor piece is provided with a first electric connecting part; the first electric connection part is provided with a first contact part, a second contact part and a first groove into which the first connection conductor is inserted; the second connecting conductor is detachably connected with the first connecting conductor through the first electric connecting part; the at least two connecting sub-conductors are stacked in the Y-th direction, the first contact parts of the two adjacent connecting sub-conductors are aligned in the X-th direction, the second contact parts of the two adjacent connecting sub-conductors are aligned in the X-th direction, and the first contact parts of the two adjacent connecting sub-conductors are in contact with the two side faces of the first connecting conductor respectively; the second contact parts are respectively contacted with two side surfaces of the first connecting conductor; according to the connector provided by the invention, the stability of connection between the electric device and the connector can be improved.

An electrical connection device includes a housing, a first electrical transmission member inserted into the housing and having a first connection hole, and a second electrical transmission member inserted into the housing and having a second connection hole. The electrical connection device includes a bolt assembly entering the housing and including a bolt passing through the first connection hole and the second connection hole, and a nut assembly threadedly connected to the bolt to fasten the first electrical transmission member and the second electrical transmission member together. The first connection hole is oblong and enables the end of the first electrical transmission member to move in a transverse direction relative to the bolt, the second connection hole is oblong and enables the end of the second electrical transmission member to move in a longitudinal direction relative to the bolt.

The invention discloses a water-absorbing and moisture-preserving type long-acting resistance-reducing grounding module and an industrial production method thereof. The water-absorbing and moisture-preserving type long-acting resistance-reducing grounding module comprises a grounding module body, a graphite-based flexible grounding belt and a water-absorbing pipe. The grounding module body is obtained by mixing graphite chippings, bentonite and water glass and then performing compression molding. And one end of the graphite-based flexible grounding strip is arranged in the grounding module body. One end of the water suction pipe is arranged in the grounding module body, and a plurality of water inlet micropores are distributed in a pipe body of the water suction pipe. According to the invention, a'graphite conductive network-water glass ion channel-bentonite water storage unit 'ternary synergistic system is constructed, and the water absorption pipe absorbs water and stores the water into the module, so that the module can still keep stable grounding resistance in a drought or freeze thawing environment, and meanwhile, flexible graphite production waste is adopted as a main raw material, so that the cost is reduced, and the production efficiency is improved. Through surface activation, particle size grading and interface optimization, 100% solid waste resource utilization is realized.

The invention provides an active lightning triggering device and method for a fan blade. The device comprises two copper rods with tip heads, a protection circuit, a boost lightning circuit and a metal shielding net. The two copper rods are arranged in parallel at the blade tip of the fan blade, one copper rod is directly grounded, and the other copper rod is connected with the boost lightning circuit through the protection circuit; the boost lightning guide circuit comprises a charging capacitor, an inductor, a high-frequency switch and a diode and is used for sensing positive high voltage and dynamically adjusting resonance characteristics so as to enhance voltage difference between thundercloud and a copper rod and trigger uplink and downlink leader to form a discharge channel; the metal shielding net wraps the blade tip and is connected with the grounding device to ensure that lightning current is preferentially discharged through the copper rod, and the blade tip structure is prevented from being damaged. According to the method, environmental meteorology and blade attitudes are monitored in real time, a boosted circuit is started in combination with threshold judgment, and control parameters are optimized by using a remote monitoring platform, so that intelligent lightning protection management is realized. According to the device, by actively exciting corona discharge and accurately guiding a lightning path, the lightning protection efficiency of the blade is remarkably improved, the damage risk of a non-lightning-receiving area is reduced, meanwhile, a maintenance decision is supported through datamation operation and maintenance, and the device is suitable for wind generating set protection in a thunderstorm area.

The utility model discloses a connecting structure of an aluminum-based double-sided copper-clad bus duct, and relates to the technical field of busbars. The copper-aluminum eutectic conducting bar comprises a copper-aluminum eutectic conducting bar body, the copper-aluminum eutectic conducting bar body comprises an aluminum alloy base body layer A, the two opposite side faces of the aluminum alloy base body layer A are covered with copper connecting layers A, and the copper-aluminum eutectic layer A is arranged between the aluminum alloy base body layer A and the copper connecting layers A. The copper-aluminum eutectic conducting bar further comprises a connector which comprises a plurality of copper-aluminum eutectic connecting pieces. The copper-aluminum eutectic conducting bar is clamped by the connector and tightly abuts against the copper-aluminum eutectic connecting piece. The beneficial effects of the utility model lie in that the copper-aluminum eutectic technology is adopted, the advantages of low density and low cost of aluminum and high conductivity and high mechanical strength of copper are combined, the conductive performance, cost and lightweight requirements are effectively balanced, the copper-aluminum eutectic conducting bar and the copper-aluminum eutectic connector are adopted, the heat dissipation is increased, the connection temperature is reduced under the same current-carrying condition, and the service life is prolonged. Damage of high temperature to materials is avoided, and production efficiency and economical efficiency are improved.

The utility model discloses a copper-clad steel grounding rod convenient to adjust, and relates to the technical field of copper-clad steel grounding rods, the copper-clad steel grounding rod comprises a rod body, the bottom of the rod body is provided with a drill bit used for smoothly applying driving force, the outer wall of the rod body is fixedly provided with a force application assembly, and the force application assembly comprises a fixing plate and a connecting plate. The device has the beneficial effects that the hammer plate is hammered by the heavy hammer, so that the connecting plate and the positioning block are driven to move downwards, the fixed plate is driven to move downwards, and the rod body moves downwards to enter underground operation, at the moment, a hammering tool does not need to be contacted with the rod body, the completeness of the rod body is kept in the hammering process, and the labor intensity of workers during hammering and hammering of the heavy hammer is reduced. And moreover, the insertion plate moves upwards to be separated from the insertion groove and then rotates backwards, so that the hammer plate moves from the top of the rod body, the use position of the hammer plate is convenient to adjust, the top of the rod body is exposed, and subsequent installation of a grounding clamp and a connecting grounding cable is convenient.

The invention relates to the technical field of high-voltage electrical equipment, and particularly discloses a preparation method of a high-performance polypropylene casing pipe, the method adopts a segmented pouring method to prepare a segmented nonlinear layer structure, from the middle to two ends of a nonlinear layer, the doping concentration gradient of a nonlinear functional filler is controlled to be reduced, and the high-performance polypropylene casing pipe is prepared. And the conductivity difference between the non-linear layer and the polypropylene insulating layer is reduced, so that the phenomenon of electric field concentration at the two ends of the non-linear layer is reduced, and the insulativity and the operation reliability of the bushing are improved.

The utility model discloses a cooking utensil, and relates to the technical field of household appliances, the cooking utensil comprises a utensil body, a target ground wire in the utensil body is connected to a ground point of a pot body in the utensil body, and the target ground wire at least comprises a first ground wire connected with a metal shell in the utensil body; and the filtering device is arranged on the target ground wire so as to eliminate interference signals brought by a wireless temperature measurement module in the appliance body. According to the cooking utensil, the problem that the EMC effect of the cooking utensil in the related technology is poor is solved.

In the process of connecting multiple cylindrical battery cells in series and parallel, weld flatness is ensured to improve the workability and productivity of the process. [Solution] The battery includes a housing, a plurality of first battery cells housed in the housing and having a first positive terminal and a first negative terminal, a plurality of second battery cells housed in the housing and having a second positive terminal and a second negative terminal, a first busbar connecting the first negative terminals of the plurality of first battery cells, a second busbar connecting the second positive terminals of the plurality of second battery cells, and a third busbar connecting the first positive terminal of the first battery cell and the second negative terminal of the second battery cell, wherein at least one of the first busbar, the second busbar and the third busbar is deformable in shape depending on the positions of the first battery cells and the second battery cells.

This invention discloses a high-vibration-resistant high-voltage surge arrester, specifically relating to the field of surge arrester technology. It includes a surge arrester body, a buffer assembly, and an adjustment assembly. Through the buffer assembly, this invention can release the blockage of the vent hole when the surge arrester body experiences severe, large-amplitude vibrations. It can adjust the buffer rigidity, allowing the first piston to continue moving downwards for buffering, thus improving the buffering effect. Furthermore, as the first piston moves to the bottom of the first chamber, it gradually blocks the connecting hole, acting as a throttling device, gradually reducing the oil output within the connecting hole. This further slows the descent speed of the first piston, thus providing multi-stage buffering. This prevents buffer failure and impacts under large-amplitude vibrations, further improving the buffering effect and extending the service life of the surge arrester.

To provide a connector which can suppress galvanic corrosion between terminals.SOLUTION: A connector comprises: a first tabular terminal 21 having a fitting hole 27; a second terminal 51; a relay terminal 30 provided between the first terminal 21 and the second terminal 51; and a bolt member 40 which fastens and fixes the first terminal 21, second terminal 51, and the relay terminal 30 to one another. The first terminal 21 and the second terminal 51 are made of different types of metal. The relay terminal 30 is made of metal whose ionization tendency is in the middle of those of the first terminal 21 and the second terminal 51. The first terminal 21 has an oxide film on the surface, of the first terminal 21, including an inner circumferential surface of the fitting hole 27. The relay terminal 30 has a press-in fixing part 32 which is pressed in and fixed to the fitting hole 27. The press-in fixing part 32 has: an insertion part 34 which is inserted into the fitting hole 27; and a protruding part 35 which protrudes from an outer circumferential surface of the insertion part 34 so as to scrape the oxide film on the inner circumferential surface of the fitting hole 27.SELECTED DRAWING: Figure 2

Implementations of the disclosure provide an electrical connector and an electrical system. The electrical connector includes a pair of covers, a plurality of insulators, and a plurality of conductive assemblies. The plurality of insulators are disposed between the pair of covers and spaced apart from each other to define a connection region for insertion of a busbar between adjacent insulators of the plurality of insulators. Each conductive assembly is disposed between corresponding adjacent insulators of the plurality of insulators and is coupled to one of the corresponding adjacent insulators. Each conductive assembly includes a metal substrate and a conductive connecting member. The conductive connecting member includes a contact plate. The contact plate is disposed on a side of the metal substrate facing towards the connection region and is coupled to the metal substrate.

The utility model relates to a practical assembly of a metal wire duct bridging protection connection conductor, comprising metal wire ducts which are in left and right butt joint; a web plate of the U-shaped connecting sheet is in lap joint with the bottom surfaces of the two metal wire grooves, and flanges of the U-shaped connecting sheet cover the side surfaces of the two metal wire grooves; the bolt and nut assembly is connected with the metal wire groove and the U-shaped connecting piece in a penetrating mode. The two ends of the protective connection conductor are punched, and the protective connection conductor crosses the butt joint of the two metal wire grooves and is spaced from the U-shaped connection sheet up and down; the grounding terminal is connected with the protection connection conductor in a penetrating manner and is fastened on the side surface of the metal wire slot; and the grounding sheet is crimped between the protection connection conductor and the grounding terminal, and the grounding sheet extends and is lapped on the flange of the U-shaped connection sheet, so that the middle part of the grounding sheet is separated from the side surface of the metal wire slot. According to the utility model, the protection connection conductor and the grounding lead head can be separately connected, thereby preventing easy loosening caused by crimping at one position.

The utility model provides a stainless steel olefin alloy ground wire lightning protection structure. The stainless steel olefin alloy ground wire lightning protection structure includes: alloy ground wire, two fixed rings, two fixed rings are installed in the both ends of alloy ground wire respectively, two fixed rings are opposite one end all fixedly connected with olefin alloy head, two olefin alloy heads another end all are equipped with the connecting assembly, two fixed rings adjacent one end all are fixedly connected with the butt joint ring, first insulating layer, first insulating layer is located in the inner surface of alloy ground wire, the alloy ground wire is from inside to outside in proper order for first stainless steel layer, multiple olefin alloy wire, filling layer, second stainless steel layer, flame -retardant layer, buffer layer and second insulating layer. The utility model provides a stainless steel olefin alloy ground wire lightning protection structure, through this design has increased the lightning protection performance of stainless steel olefin alloy ground wire, has reduced the probability that the stainless steel olefin alloy ground wire is hit by lightning and is damaged.

The application discloses a high-voltage dynamic power transmission system, and relates to the technical field of high-voltage power transmission equipment, which comprises a shell, a stator-side high-voltage brush assembly, a rotor conductive ring, a high-voltage armored cable, a rotary sealing assembly, a double-head conductive piece, a main shaft and a rotor extension shell body. An installation opening is formed in the shell and penetrates the shell along the thickness direction of the shell, and the main shaft penetrates the installation opening. The rotary sealing assembly is arranged on the main shaft at the installation opening and is used for providing rotary support for the main shaft and sealing the installation opening. The rotor conductive ring is fixed on the main shaft in the shell. The stator-side high-voltage brush assembly is installed on the wall surface of the shell, one end of the stator-side high-voltage brush assembly is in sliding contact with the conductive surface of the rotor conductive ring, and the other end of the stator-side high-voltage brush assembly is used for electrically connecting with external equipment. The rotor extension shell body is fixedly connected with the main shaft which extends out of the installation opening. The double-head conductive piece is fixedly arranged on the wall surface of the rotor extension shell body. The application can reduce the failure risk of the rotary sealing assembly, improve the reliability of the rotary sealing assembly and reduce the maintenance cost.