CN109830865B - Conductive slip ring structure - Google Patents
Conductive slip ring structure Download PDFInfo
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- CN109830865B CN109830865B CN201910253818.7A CN201910253818A CN109830865B CN 109830865 B CN109830865 B CN 109830865B CN 201910253818 A CN201910253818 A CN 201910253818A CN 109830865 B CN109830865 B CN 109830865B
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Abstract
The invention discloses a conductive slip ring structure, which comprises a stator structure and a rotor structure, wherein the rotor structure comprises a base and a copper ring, a baffle and an insulating spacer ring are respectively arranged between the copper ring and the base for isolation, the whole body is axially overlapped and assembled, the rotor is cut into two symmetrical halves after the whole assembly, and the two halves of the rotor are connected into a whole through a connecting piece; and a carbon brush displacement mechanism is arranged in the stator structure, so that the position of the carbon brush relative to the surface of the rotor copper ring is adjusted. Compared with the prior art, the conductive slip ring adopts a two-half structure, is suitable for the installation site where the rotor shaft can not be disassembled, and each group of carbon brushes adopts an independent brush pressing mechanism, so that the problem of spark on the surfaces of the carbon brushes and the copper ring is solved; the carbon brush displacement mechanism is remotely controlled to move, so that the surfaces of the carbon brush and the rotor copper ring are automatically pressed/moved away, and the abrasion of the carbon brush is reduced; the slip ring is matched with video monitoring and hot gas blowing equipment, the working state of the slip ring is monitored in real time, and the problem of copper ring surface condensation is solved.
Description
Technical Field
The invention relates to the field of aerodynamic tests, in particular to a conductive slip ring structure of an anti-icing fan blade temperature closed-loop control system.
Background
The icing wind tunnel is the same as other low-speed wind tunnels, the power system is a wind tunnel heart part, a motor is adopted to drive a fan rotor to rotate to simulate the air flow speed, and the air speed of a test section is changed by adjusting the rotating speed of the motor. And the motor and the rotor system of the icing wind tunnel power system are arranged on the fan section and are positioned behind the second corner section. Different from other low-speed wind tunnels, the lowest ambient temperature in the fan section of the icing wind tunnel is 40 ℃, the ambient pressure is as low as 5kPa, and the humidity is 100%. In the icing wind tunnel test process, when the liquid water content is accumulated to a certain degree, the high-speed airflow drives the supercooled water drops to impact the surface of the supercooled fan blade, and the surface of the front edge of the fan blade is quickly iced. After the fan blades are frozen, the molded surface is changed, so that the vibration of a fan motor and a rotor bearing exceeds the standard.
In order to solve the problem of icing of the fan blades, an electric heating unit is arranged at the front edge of each fan blade, the fan blades are heated by supplying power, heat is transferred to the surfaces of the fan blades by utilizing the thermodynamic principle, adhesion stress between an ice layer and the surfaces of the fan blades is damaged, and the aim of preventing icing is fulfilled under the action of aerodynamic force or centrifugal force.
In a realistic wind tunnel environment, many wind tunnels have been built and various devices have been installed in place. In order to realize the heating of the fan blades, only technical improvement can be carried out on the basis of the existing equipment, and the disassembly of the whole equipment for the purpose is impossible. The fan blades are arranged around a fan rotor hub and synchronously rotate along with a fan rotor, the diameter of a whole set of fan rotor reaches several meters, the quality of the whole set of fan rotor reaches dozens of tons, and a fan rotor shaft is coaxial with a fan motor shaft and is connected with the fan rotor shaft through a coupler; the two sides of the fan rotor are supported by independent bearings, and the gap between the fan rotor and the bearing box supported by the two sides is generally less than 10 cm.
In order to introduce a ground heating power supply into each fan blade on a fan rotor, a rotary power supply device is designed on the basis of the existing condition of a fan section, and the heating power supply is introduced into the rotary fan blades from the ground under the condition that the fan rotor and a supporting bearing are inconvenient to reform, so that the structural design problem of the rotary power supply device is solved, and the heating power supply is stably and reliably transmitted to each fan blade from the ground; the problems of insulation and safety protection of the rotary power supply device in low-temperature and high-humidity environments are solved; the problem of cable arrangement and installation that rotatory power supply unit exported to every blade is solved.
The conductive slip ring is a rotary power supply device, as long as the axial space is enough, the conductive slip ring can be customized according to conditions, a rotor of the conductive slip ring is connected with a rotor shaft of a fan, and a stator is fixed at a non-rotating part on the ground. Because the axial clearance between the fan rotor and the supporting bearing boxes on the two sides is less than 10cm, and no space for installing a multi-channel and high-current conductive slip ring is arranged in the axial direction, the field requirement can not be met by adopting the conventional conductive slip ring structure. Meanwhile, the diameter of the fan rotor reaches several meters, the rotating speed of the fan rotor exceeds 500rpm, the diameter of a shaft and a shaft sleeve which can be provided with the conductive slip ring is close to 1m, the linear speed of the conductive slip ring exceeds 20m/s, and the common brush wire conductive slip ring cannot meet the requirements of icing wind tunnel test equipment, so that a new conductive slip ring structure is required to be provided to solve the current problems.
Disclosure of Invention
The invention aims to design a conductive slip ring with two rotor halves, an open loop and an automatic carbon brush moving type on the basis of a conductive slip ring principle under the condition that a fan rotor shaft and a bearing cannot be integrally transformed under the special field environment of a fan section of an icing wind tunnel so as to solve the technical problems of installation of the conductive slip ring, large size of a conductive slip ring rotor, high linear speed of a stator carbon brush, abrasion of the carbon brush, loop condensation and the like when the fan rotor shaft and the bearing are not disassembled.
The design idea of the invention is as follows: the electric conduction slip rings respectively design a set of electric conduction slip rings by utilizing the limited space between the fan rotor and the supporting bearing boxes at the two sides, each set of slip ring is provided with only one loop, one path of bus of the fan blade heating power supply is respectively transmitted, and the two paths of bus are connected with the electric heating units of the fan blades which are connected in parallel on the fan rotor to form an electric heating loop. The conductive slip ring mainly comprises a stator mechanism and a rotor mechanism, wherein the rotor mechanism is designed into two halves, the two halves are cut after integral design and processing, all parts are assembled and then processed with concentricity and flatness together, and the parts are assembled on site and sleeved on a fan rotor shaft to ensure the concentricity and the verticality of a conductive slip ring rotor and a fan rotor system. The stator mechanism adopts a cantilever structure, one end of the stator mechanism is arranged on the supporting bearing box seat, and the other end of the stator mechanism is pressed on the surface of the copper ring of the conductive loop of the rotor mechanism through a carbon brush. The slip ring rotor has large outer diameter, high linear speed and large transmission current, and the stator carbon brush adopts a silver-dipped electrochemical graphite brush block combination; the stator mechanism adopts an electric push rod to control the displacement of the carbon brush, and the carbon brush and the surface of the rotor conductive loop are automatically controlled to be pressed/removed as required. And the surface of the circular channel is purged by hot gas, so that the surface of the circular channel of the rotor is not condensed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a conductive slip ring structure comprises a stator structure and a rotor structure, wherein the rotor structure comprises a base and a copper ring, a baffle and an insulating spacer ring are respectively arranged between the copper ring and the base for isolation, the whole is axially overlapped and assembled, the rotor is cut into two symmetrical halves after the whole is assembled, the two halves of rotors are connected into a whole through a connecting piece, the stator structure comprises a fixed seat and a carbon brush component and is installed by adopting a cantilever structure, one end of the fixed seat is fixed on a fan rotor supporting bearing seat, and the other end of the fixed seat supports the carbon brush component; one end of the carbon brush assembly is connected with the fixed seat, and the other end presses the carbon brush on the surface of the copper ring of the rotor mechanism through the spring; and a carbon brush displacement mechanism is arranged in the stator structure, and the carbon brush displacement mechanism enables the position of the carbon brush relative to the copper ring to be adjusted.
In the above technical scheme, after the rotor structure is integrally cut, the connecting end face is of an asymmetric structure.
In the technical scheme, the copper ring, the baffle and the insulating spacer at the connecting end face of the rotor structure are arranged in a staggered mode in the axial direction and the radial direction, and the gaps among the copper ring, the baffle and the insulating spacer are solidified by insulating filling agents.
In the above technical scheme, carbon brush displacement mechanism includes fixing base and the guide post of setting on the fixing base, and the one end fixedly connected with bottom plate of guide post is provided with electric putter on the bottom plate, and electric putter's end connection is to the clamp plate, be provided with the spliced pole that is used for connecting the carbon brush on the clamp plate, electric putter promotes the clamp plate and drives the carbon brush and remove.
In the technical scheme, the connecting column is a bolt and is in threaded connection with the pressing plate, the bolt is connected with the carbon brush through the pressure spring, the position of the carbon brush is adjusted by rotating the bolt, and the carbon brush is pressed on the surface of the copper ring through thrust generated by the pressure spring.
The utility model provides an adopt anti-icing fan section of conducting ring structure, include the fan rotor and install a plurality of flabellums at the fan rotor, the fan rotor axle supports through both sides roller bearing, set up one set of conductive slip ring between fan rotor and both sides support bearing respectively, rotor structure card cover in the conductive slip ring structure is fixed connection on the fan rotor axle, wherein the lead-out wire on one set of conductive slip ring rotor mechanism is connected with the lead-out wire on another set of conductive slip ring behind the heating element on each flabellum on the fan rotor, the external heating power supply passes through the stator structure carbon brush of conductive slip ring structure, rotor structure copper ring and the fan blade electric heating element on the fan rotor constitute closed return circuit.
In the technical scheme, the heating units on all the blades on the fan rotor are resistive loads, the resistance values of the resistors of all the blades are consistent, and the electric heating units of all the fan blades are connected in parallel and then connected with the rotor copper rings of the two sets of conductive slip rings.
In the technical scheme, after the conductive slip ring rotors which are cut into two halves are assembled into a whole, each half of the rotors of the conductive slip ring are connected with each other by the short wires led out from the copper ring, so that the reliable electrical connection of the copper ring is ensured.
In the above technical solution, the fan section includes an air supply pipeline, and nozzles of the air supply pipeline are respectively disposed on two sides of the fan rotor and aligned with the surface of the copper ring in the conductive slip ring rotor structure.
In the technical scheme, two sides of the fan rotor in the fan section are respectively provided with a set of video monitoring system for monitoring electric sparks generated between the copper ring and the carbon brush and the position of the carbon brush relative to the copper ring in real time.
The invention mainly aims at the problem that the clearance between a fan rotor and supporting bearing boxes on two sides is small, and no axial space for installing a multi-channel and high-current conductive slip ring is provided. Considering that a plurality of fan blades of the fan rotor are in the same working environment, the blade heating units are resistive loads, the resistance value of each blade is basically consistent, the installation and the heat dissipation of the heating units are basically consistent, all the fan blade electric heating units run in parallel, the number of conductive slip ring channels is reduced, and only one electric heating main loop is designed. A set of conductive slip rings are respectively designed in a limited space between the fan rotor and the supporting bearing boxes on the two sides, each set of slip ring is provided with only one loop, and one path of bus of the electric heating loop is respectively transmitted. Each set of conductive slip ring mainly comprises a stator mechanism and a rotor mechanism.
The slip ring stator mechanism mainly comprises a fixed seat, a carbon brush assembly, a brush holder mechanism, a guide screw, a pressing plate, a carbon brush displacement mechanism, a bottom plate and the like. The whole stator mechanism adopts a cantilever structure, one end of the stator mechanism is arranged on the end surface of the supporting bearing box seat and is fastened by a plurality of screw rods; the other end is pressed on the conductive loop of the rotor mechanism through a carbon brush.
The fixed seat is a base of the stator and is used for supporting all parts of the stator. One end of the fixing seat is provided with a plurality of U-shaped screw holes which are fixed on the end surface of the bearing box seat through screws. Through adjustment, the fixed seat can move forwards and backwards along the rotor shaft, so that the center of the carbon brush is pressed at the center of the contact surface of the circular path; the initial position of the carbon brush is adjusted by adjusting the thickness of the cushion block between the fixed seat and the bearing box.
According to the magnitude of the conductive current, a plurality of groups of carbon brushes are connected in parallel for the carbon brush assembly of the slip ring stator, and the carbon brushes adopt silver-impregnated graphite brush blocks which are moisture-resistant, wear-resistant and high in current density. The contact surface of the carbon brush is processed into an arc surface with the same diameter as the outer diameter of the rotor copper ring, so that the contact area between the carbon brush and the loop is increased. The carbon brush lead-out wire penetrates through the pressing plate and the bottom plate and is connected with a heating power supply through the cold pressing pipe type joint.
The brush holder mechanism is used for fixing the carbon brush and mainly comprises a tin bronze fixing frame, an insulating frame, a fixing support, a guide screw, a thrust spring, a pressing plate and the like. The carbon brush is installed in the tin bronze mount, and the tin bronze mount is installed in insulating frame again. The insulating frame is connected with the pressing plate through the fixing support, so that the whole insulating frame and the pressing plate can move up and down along the guide screw rods on the two sides. Each tin bronze fixing frame is provided with a thrust spring, and the tail part of the spring is axially stopped by a bolt. The thrust spring and the bolt are directly connected with the tin bronze fixing frame, the pressure of the thrust spring is adjusted by pushing the bolt along the screw hole of the pressing plate, and the carbon brush is tightly pressed and attached to the surface of the loop and keeps a certain pressure. The wear condition of the carbon brush is periodically checked, the pressure of the carbon brush is continuously kept through the propelling of the bolt, and the generation of sparks is avoided.
The guide screw connects the fixed seat, the pressing plate and the bottom plate, and the position of the pressing plate is adjusted by adjusting a positioning nut in the middle of the guide screw, so that the gap between the carbon brush and the surface of the rotor loop is adjusted.
The carbon brush displacement mechanism comprises a bottom plate, an electric push rod and the like. The electric push rod is fixed in the middle of the bottom plate, and the bottom plate is supported and fixed by the guide screw rods on the two sides. The electric push rod is used for controlling the brush frame mechanism to move along the radial direction of the hub, so that the carbon brush is pressed against or moved away from the surface of the rotor loop. The electric push rod has the functions of zero position and limiting protection, when the carbon brush displacement mechanism is remotely controlled to be pressed, the electric push rod drives the carbon brush displacement mechanism to move towards the direction of the rotating shaft, the electric push rod is automatically powered off after reaching the zero position, and the carbon brush is pressed on the surface of the slip ring loop by virtue of self-locking force; when the carbon brush displacement mechanism is remotely controlled to move away, the electric push rod drives the carbon brush displacement mechanism to move in the opposite direction of the rotating shaft, the electric push rod is automatically powered off after the electric push rod reaches the limit, and the carbon brush is separated from the surface of the loop by a certain gap.
The rotor mechanism comprises a base, a baffle, an insulating spacer ring, a copper ring, a positioning pin, a screw, a base mounting hole, a copper ring short-circuit wire, a rotor outgoing wire and the like, and the whole rotor mechanism is axially stacked and mounted. The base is made of 40CrMnMo material and has good low-temperature impact toughness; after rough machining of the base, 2 positioning holes are machined at the cutting positions respectively. The copper ring is made of tin bronze, has high mechanical property, wear resistance and corrosion resistance, and is plated with noble metal on the surface. The copper ring and the base are isolated by the baffle and the insulating spacer ring respectively, so that the copper ring and the base are insulated. After all parts such as the base, the baffle, the insulating spacer ring, the copper ring and the like are assembled, 4 positioning holes are axially processed, and after the positioning pins are installed, the inner hole, the outer circle and the end surfaces on two sides of the rotor base are finely processed, so that the concentricity of the rotor, the roundness of the ring path and the verticality of the ring path and the installation plane are ensured. A plurality of insulating rotation stopping rods are axially arranged on the rotor assembly, so that the rotor assembly is prevented from being loosened radially when rotating at a high speed. The copper ring, the baffle and the insulating spacer are designed in a staggered mode in the axial direction and the radial direction, and all gaps are cured by insulating glue. In order to ensure reliable transmission of current at two sides of the copper ring after the rotor is cut, a plurality of short wires are led out from each side of the copper ring and used for reliable connection of the copper ring after the rotor is cut, and meanwhile, a plurality of wires are output by the copper ring and are respectively connected to each fan blade electric heating unit along the radial direction of the hub. After the rotor assembly is divided into two parts by linear cutting, the rotor assembly is assembled into an integral ring on the rotor shaft on site, and the two divided surfaces are connected and fixed by bolts, so that the concentricity and the verticality of the slip ring rotor and the fan rotor are ensured. The mounting base of the rotor mechanism is axially fastened on the fan rotor through 4 screws and synchronously rotates along with the rotor. Through design, adjustment cushion height adjustment rotor mechanism and fan rotor wheel hub installation clearance, through design, installation dog all around along the sliding ring rotor, guarantee sliding ring rotor mechanism along wheel hub radial positioning.
Due to low temperature, low air pressure and high humidity in the fan section, the spark condition of the conductive slip ring and the position of the carbon brush are not suitable for being observed in the fan section. In order to know the working condition of the conductive slip ring in real time, video monitoring systems are respectively installed on two sides of a fan rotor in the fan section, and the working condition of the conductive slip ring is remotely monitored in real time.
In order to solve the problem of condensation on the surface of a slip ring rotor, a medium-pressure air source is connected into an air supply pipeline after being subjected to pressure reduction, dehumidification and heating, and respectively enters the two sides of a fan section rotor system along front and rear supporting legs of a fan section, a pipeline valve is controlled remotely, so that the air supply pipeline is used for blowing air to the surface of a rotor copper ring, and carbon powder and condensation on the surface of the rotor copper ring are blown in real time.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
compared with the prior art, the conductive slip ring adopts a two-half structure, and is suitable for the installation site where the rotor shaft and the supporting bearing cannot be detached; the slip ring has large overall dimension, the linear velocity of the carbon brush exceeds 25m/s, and the structural design problem of the high-rotating-speed conductive slip ring is solved; each group of carbon brushes adopts an independent brushing and pressing mechanism, so that the problem of spark on the surfaces of the carbon brushes and the copper rings is solved; the brush holder mechanism is remotely controlled to move, so that the surfaces of the carbon brush and the rotor copper ring are automatically pressed/moved away, and the abrasion of the carbon brush is reduced; the slip ring is matched with video monitoring and hot gas blowing equipment, the working state of the slip ring is monitored in real time, and the problem of surface condensation of a loop is solved.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a conductive slip ring stator configuration;
FIG. 2 is a front view of a conductive slip ring rotor structure;
FIG. 3 is a side view of a conductive slip ring rotor structure;
FIG. 4 is a schematic view of a conductive slip ring installation;
in the figure: the structure comprises an insulating frame 1, a tin bronze fixing frame 2, a carbon brush assembly 3, a fixing seat 4, a thrust spring 5, a fixing support 6, a pressing plate 7, a guide screw 8, a bolt 9, an electric push rod 10, a bottom plate 11, a base 12, a baffle 13, an insulating spacer ring 14, a copper ring 15, a positioning pin 16, a screw 17, a base mounting hole 18, a copper ring short-circuit wire 19, a rotor outgoing wire 20, a fan rotor shaft 21, a conductive slip ring 22, a fan rotor 23, fan blades 24 and a support bearing 25.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
As shown in fig. 1, the slip ring stator mechanism mainly comprises an insulating frame 1, a tin bronze fixing frame 2, a carbon brush assembly 3, a fixing seat 4, a thrust spring 5, a fixing support 6, a pressing plate 7, a guide screw 8, a bolt 9, an electric push rod 10, a bottom plate 11 and the like.
And designing each part of the conductive slip ring stator mechanism according to field conditions. Firstly, the installation position of a stator mechanism is determined, the whole stator mechanism adopts a cantilever mechanism, the fixed seat 4 is a stator mechanism base, one end of the fixed seat is installed at a ground fixed end, such as the end faces of bearing boxes at two sides of a rotor system, and the other end of the fixed seat is used for supporting the stator mechanism, so that the carbon brush component 3 is pressed on the surface of a copper ring 15 of the rotor mechanism. In order to adjust the position of the carbon brush component 3 pressed on the copper ring 15 of the rotor mechanism, the mounting hole of the fixed seat 4 is designed to be a U-shaped screw hole, so that the stator mechanism moves forwards and backwards along the rotor shaft, and the center of the carbon brush component 3 is pressed at the center of the contact surface of the copper ring 15 of the rotor mechanism. The initial position of the stator mechanism is adjusted by adjusting the thickness of the end face cushion block between the fixed seat 4 and the bearing box.
According to the magnitude of the conductive current, one or more groups of carbon brushes are connected in parallel in the carbon brush assembly 3, and the contact surface of the carbon brush assembly 3 and the copper ring 15 is processed into an arc surface with the same diameter as the outer diameter of the copper ring 15, so that the contact area of the carbon brush and a loop is increased. The lead-out wire of the carbon brush assembly penetrates through the pressing plate 7 and the bottom plate 11 and is connected with an external heating power supply through a cold pressing pipe type connector. The carbon brush assembly 3 is arranged in the tin bronze fixing frame 2 to form a component; and then integrally mounted in the insulating frame 1. The insulating frame 1 is connected with the pressure plate 7 into a whole through the fixing supports 6 at two sides and can move up and down along the guide screw rods 8 at two sides. Each tin bronze fixing frame 2 is provided with a thrust spring 5, and the tail part of the spring is axially stopped by a bolt 9. The thrust spring 5 and the bolt 9 are directly connected with the tin bronze fixing frame 2, and the bolt 9 pushes along the pressing plate screw hole to adjust the pressure of the thrust spring 9, so that the carbon brush assembly 3 and the copper ring 15 keep a certain pressure. The fixed seat 4, the pressing plate 7 and the bottom plate 11 are connected through the guide screws 8 on the two sides, the position of the pressing plate 7 is adjusted through adjusting the positioning nuts in the middle of the guide screws 8, and the initial gap between the carbon brush assembly 3 and the copper ring 15 is adjusted.
The carbon brush displacement mechanism consists of a bottom plate 11 and an electric push rod 10. Electric putter 10 is fixed in bottom plate 11 middle part, and bottom plate 11 is supported by both sides lead screw and is fixed in fixing base 4 upper end. The electric push rod 10 is used for controlling the carbon brush component 3, the tin bronze fixing frame 2, the insulating frame 1, the fixing support 6 and the pressing plate 7 to integrally move up and down along the guide screw rods 8 on the two sides, so that the carbon brush component 3 is pressed or moved away from the surface of the copper ring 15 loop. The electric push rod 10 has the functions of zero position and limiting protection, when the carbon brush displacement mechanism is remotely controlled to be pressed, the electric push rod 10 drives the carbon brush displacement mechanism to move towards the direction of the rotating shaft, the electric push rod 10 is automatically powered off after reaching the zero position, and the carbon brush component 3 is pressed on the surface of the copper ring 15 loop by virtue of self-locking force; when the carbon brush displacement mechanism is remotely controlled to move away, the electric push rod 10 drives the carbon brush displacement mechanism to move in the opposite direction of the rotating shaft, and the electric push rod 10 is automatically powered off after reaching the limit, so that the initial gap between the carbon brush assembly 3 and the surface of the copper ring 15 loop is recovered.
As shown in fig. 2 and fig. 3, in the present embodiment, for a workplace where a rotating shaft cannot be detached and a space in the axial direction of the rotating shaft is limited, a conductive slip ring rotor mechanism is designed according to field conditions. The rotor mechanism comprises a base 12, a baffle 13, an insulating spacer ring 14, a copper ring 15, a positioning pin 16, a base mounting hole 17 and the like; the baffle 13 and the insulating spacer ring 14 are used for isolating and insulating the copper ring 15 from the base 12; the baffle 13, the insulating spacer 14 and the copper ring 15 are designed in a staggered mode in the axial direction and the radial direction, and all gaps are cured by insulating glue; the positioning pin 16 is used for assembly positioning after part processing and cutting, and ensures the concentricity of the rotor, the roundness of the copper ring 15 and the verticality of the loop and the mounting plane.
As shown in fig. 3, the parts are machined according to the design drawing, the axial superposition assembly is adopted, the rotor mechanism is divided into two halves by linear cutting, the two halves are assembled to form an integral ring on the fan rotor shaft 21 in the installation site, and the two halves of the division surfaces are connected and fixed by bolts, so that the concentricity and the perpendicularity of the slip ring rotor and the fan rotor 23 are ensured. The screw 17 passes through the base mounting hole 18 to axially secure the rotor mechanism to the fan rotor 23. The rotor mechanism and the fan rotor 23 are installed in a gap through designing and adjusting the height of the cushion block, and the slip ring rotor mechanism is guaranteed to be positioned along the radial direction of the hub through designing and installing stop blocks around the slip ring rotor. In order to ensure reliable transmission of the current on the two sides of the copper ring after the rotor is cut, after the copper ring 15 is cut into two halves, a copper ring short-circuit wire 19 and a rotor outgoing wire 20 are led out from each half, the copper ring short-circuit wire 19 is used for reliable transmission of the current on the two sides after the copper ring 15 is cut, and the rotor outgoing wires 20 are respectively connected into each fan blade electric heating unit along the radial direction of the rotor.
In this embodiment, a set of conductive slip rings 22 is respectively designed on both sides of the fan rotor 23 to solve the problem that the axial gap between the fan rotor 23 and the support bearings 25 on both sides is narrow. In order to ensure the reliability of connection, one set of rotor multi-strand outgoing lines 20 of the conductive slip rings 22 are respectively connected to one end of an electric heating unit of the fan blade, and the other end of the electric heating unit is connected with the other set of rotor outgoing lines 20 of the conductive slip rings. Then, carbon brush outgoing lines of the stator structures of the two sets of conductive slip rings 22 are connected with the output end of the ground heating power supply, so that the two sets of conductive slip rings 22, the fan blade heating unit, the heating power supply and the main loop form a heating loop. By adopting the ingenious structure that the heating power supply is led in from one side of the fan rotor 23 and is output from the other side, the technical problem that two large-current loops cannot be designed on one set of conductive slip ring because the axial gap between the fan rotor 23 and the supporting bearings 25 on the two sides is narrow is solved. In addition, because the rotor part of the conductive slip ring is connected with the fan blades 24 by adopting a plurality of strands of outgoing wires, all the fan blades are equivalently connected between the two conductive slip rings in parallel, even if one of the fan blades 24 fails to be electrically heated, the work of the whole heating loop cannot be influenced, and the fan blade temperature can be quickly determined to have a problem by monitoring the temperature of the fan blades on line. Finally, because two sets of conductive slip rings 22 are respectively arranged on two sides of the fan rotor 23, the distance between two loops of the conductive slip rings is increased, and the possibility of short circuit between the two loops is effectively avoided. Because the working environment of the conductive slip ring is low temperature and moist, if two large-current loops of the conductive slip ring are adjacent, once sparks are generated on the surfaces of the carbon brush and the copper ring or 100% humidity is condensed between the two loops, the two adjacent loops are probably caused to be in short circuit greatly, and the safety and reliability of the whole equipment are greatly improved.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A conductive slip ring structure comprises a stator structure and a rotor structure, wherein the rotor structure comprises a base and a copper ring, a baffle and an insulating spacer ring are respectively arranged between the copper ring and the base for isolation, and the whole is axially overlapped and assembled; one end of the carbon brush assembly is connected with the fixed seat, and the other end presses the carbon brush on the surface of the copper ring of the rotor mechanism through the spring; and a carbon brush displacement mechanism is arranged in the stator structure, and the carbon brush displacement mechanism enables the position of the carbon brush relative to the copper ring to be adjusted.
2. The structure of claim 1, wherein the connecting end surface is asymmetrical after the rotor structure is integrally cut.
3. The structure of claim 2, wherein the copper ring, the baffle plate and the insulating spacer at the connection end face of the rotor structure are axially and radially offset, and the gap between the copper ring, the baffle plate and the insulating spacer is solidified by an insulating filler.
4. The conductive slip ring structure according to claim 1, wherein the carbon brush displacement mechanism comprises a fixed seat and a guide post disposed on the fixed seat, one end of the guide post is fixedly connected with a bottom plate, a power push rod is disposed on the bottom plate, an end of the power push rod is connected to the pressure plate, a connection post for connecting the carbon brush is disposed on the pressure plate, and the power push rod pushes the pressure plate to drive the carbon brush to move.
5. The structure of claim 4, wherein the connection post is a bolt, the connection post is connected to the pressing plate by a screw thread, the bolt is connected to the carbon brush by a compression spring, the position of the carbon brush is adjusted by rotating the bolt, and the carbon brush is pressed against the surface of the copper ring by a thrust generated by the compression spring.
6. An anti-icing fan section adopting the conductive slip ring structure as claimed in any one of claims 1 to 5, comprising a fan rotor and a plurality of fan blades mounted on the fan rotor, wherein the fan rotor shaft is supported by roller bearings on both sides, characterized in that a set of conductive slip rings are respectively arranged between the fan rotor and the support bearings on both sides, the rotor structure in the conductive slip ring structure is clamped and sleeved on the fan rotor shaft for fixed connection, the outgoing line on one set of conductive slip ring rotor mechanism passes through the heating unit on each fan blade on the fan rotor and then is connected with the outgoing line on the other set of conductive slip ring, and the external heating power supply forms a closed loop through the stator structure carbon brush of the conductive slip ring structure, the rotor structure copper ring and the electric heating unit on the fan rotor.
7. The anti-icing fan section according to claim 6, wherein the heating units on all the blades on the fan rotor are resistive loads, the resistance values of each blade are the same, and all the fan blade electric heating units are connected in parallel and then connected with the rotor copper rings of the two sets of conductive slip rings.
8. The anti-icing fan section according to claim 6, wherein the conductive slip ring rotor structure cut in half is assembled into a single body, and each half of the conductive slip ring rotor structure is connected to each other by a shorting wire led out from the copper ring for ensuring reliable electrical connection of the copper ring.
9. The anti-icing fan section of claim 6, wherein the fan section includes an air supply duct having outlets disposed on opposite sides of the fan rotor and aligned with the copper ring surfaces of the conductive slip ring rotor structure.
10. The anti-icing fan section according to claim 6, wherein a set of video monitoring system is respectively arranged on two sides of the fan rotor in the fan section, and is used for monitoring electric sparks generated between the copper rings and the carbon brushes and the positions of the carbon brushes relative to the copper rings in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910253818.7A CN109830865B (en) | 2019-03-30 | 2019-03-30 | Conductive slip ring structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910253818.7A CN109830865B (en) | 2019-03-30 | 2019-03-30 | Conductive slip ring structure |
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| CN109830865A CN109830865A (en) | 2019-05-31 |
| CN109830865B true CN109830865B (en) | 2020-04-17 |
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| CN206180338U (en) * | 2016-05-04 | 2017-05-17 | 杭州驰宏科技有限公司 | Lead electrical slip ring with adjustable |
| CN106887783A (en) * | 2017-03-08 | 2017-06-23 | 深圳市晶沛电子有限公司 | A kind of conducting slip ring |
| CN109149309B (en) * | 2018-08-29 | 2020-08-04 | 中远海运科技股份有限公司 | Shore power cable drum current collector |
| CN109378667B (en) * | 2018-11-12 | 2020-09-15 | 大同新成新材料股份有限公司 | Electric brush adjusting device and adjusting method thereof |
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