CN220172547U - Current collecting device and wind generating set - Google Patents

Abstract

The utility model discloses a current collecting device and a wind generating set, wherein the current collecting device is used for transmitting current and comprises a stator structure and a rotor structure, the stator structure is provided with a conductive piece, the conductive piece comprises a mounting plate and a rolling body, the mounting plate is provided with a rolling groove, and the rolling body is movably arranged in the rolling groove; the rotor structure is rotationally connected with the stator structure, the rotor structure is provided with a conductive surface, the conductive surface is in rolling contact with the rolling body, and the rotor structure is in conductive communication with the conductive piece through the rolling body; when the rotor structure rotates relative to the stator structure, the rolling bodies move in the rolling grooves. The utility model aims to simplify the structure of the current collecting device and enhance the structural stability of the current collecting device on the basis of meeting the dynamic conduction, so that the current collecting device is easier to overhaul and has longer service life.

Description

Current collecting device and wind generating set

Technical Field

The utility model relates to the technical field of wind power generation equipment, in particular to a current collecting device and a wind generating set using the same.

Background

In the running process of the wind turbine, the wind direction is continuously changed, so that the wind turbine is required to yaw to generate electricity by utilizing wind energy at maximum efficiency, the wind turbine cabin can coaxially rotate relative to the tower, and at the moment, an electric slip ring is required to be arranged between the wind turbine cabin and the tower so as to realize dynamic transmission of current.

The current conductive slip ring applied to the fan generally adopts a carbon brush conductive structure, such as carbon brush and metal rotation abutting or carbon brush and carbon brush rotation abutting, so that current dynamic transmission is realized, but the carbon brush conductive structure is complex in manufacture and installation, poor in stability of the whole structure, poor in wear resistance of the carbon brush, low in service life, and high in cost, and the carbon brush needs to be frequently overhauled and replaced.

Disclosure of Invention

The utility model mainly aims to provide a current collecting device and a wind generating set, and aims to simplify the structure of the current collecting device and enhance the structural stability of the current collecting device on the basis of meeting dynamic conduction, so that the current collecting device is easier to overhaul and has longer service life.

To achieve the above object, the present utility model proposes a current collecting device for transmitting electric current, comprising:

the stator structure is provided with a conductive piece, the conductive piece comprises a mounting plate and a rolling body, the mounting plate is provided with a rolling groove, and the rolling body is movably arranged in the rolling groove; and

the rotor structure is rotationally connected with the stator structure and is provided with a conductive surface, the conductive surface is in rolling contact with the rolling body, and the rotor structure is in conductive communication with the conductive piece through the rolling body;

when the rotor structure rotates relative to the stator structure, the rolling bodies move in the rolling grooves.

In an embodiment, the mounting plate and the rolling body are electrical conductors, and the conductive surface is in electrical communication with the rolling body to enable the rotor structure to be in electrical communication with the conductive member;

or, the inner peripheral wall of the rolling groove is provided with a conductive layer, the rolling body is a conductive body, the rolling body is in conductive communication with the conductive layer, and the conductive surface is in conductive communication with the rolling body, so that the rotor structure is in conductive communication with the conductive piece.

In an embodiment, the rolling body is formed with a cavity, and a heat dissipation groove communicated with the cavity is formed on the surface of the rolling body, and the heat dissipation groove is spirally arranged and extends along the extending direction of the rolling groove.

In an embodiment, the rolling grooves are multiple, the rotor structure is provided with a rotation axis, the rolling grooves are annularly arranged around the rotation axis, and the rolling grooves are annularly arranged at intervals;

the rolling bodies are arranged in a plurality of corresponding rolling grooves, so that each rolling body rolls in one rolling groove, and rolls along the tangential direction of the ring.

In an embodiment, each rolling groove extends in a direction perpendicular to and away from the rotation axis, so that a plurality of rolling grooves are radially arranged around the rotation axis.

In an embodiment, a plurality of the rolling grooves are arranged at intervals along a direction away from the rotation axis, and the plurality of the rolling grooves form a plurality of annular shapes concentrically arranged with the rotation axis as a center;

and/or the section of the rolling groove along the direction of the rotation axis is rectangular, and the rolling body is a cylinder;

and/or the section of the rolling groove along the direction of the rotation axis is trapezoid, and the rolling body is a frustum body;

and/or the cross section of the rolling groove along the direction of the rotation axis is circular, and the rolling body is a sphere.

In an embodiment, the mounting plate is further provided with an oil guiding groove, the oil guiding groove is communicated with the rolling groove, and the oil guiding groove and the rolling groove are used for containing lubricating grease.

In one embodiment, the rotor structure is provided with a rotation axis, an annular groove is formed in one side of the mounting plate facing the rotor structure, the annular groove is arranged around the rotation axis, the rolling groove is formed in the bottom wall of the annular groove, and the rolling body protrudes out of the notch of the rolling groove and stretches into the annular groove;

the rotor structure is provided with an abutting bulge, one side of the abutting bulge facing the stator structure forms the conductive surface, and the abutting bulge stretches into the annular groove and is in rolling abutting connection with the rolling body through the conductive surface.

In an embodiment, the rotor structure has a rotation axis, the stator structure includes a stator base and a plurality of conductive members, and the plurality of conductive members are concentrically disposed about the rotation axis and are spaced apart from the stator base in a direction away from the rotation axis;

the rotor structure comprises a plurality of rotor pieces, the rotor pieces are arranged in concentric circles, and each rotor piece is provided with a conductive surface so that each conductive surface is in rolling abutting connection with the rolling body in one ring group.

The utility model also proposes a wind power generator set comprising:

a tower;

the engine room is rotationally connected with the tower, and is provided with a generator; a kind of electronic device with high-pressure air-conditioning system

In the above-mentioned current collector, the rotor structure of the current collector is disposed in the nacelle and connected to the generator, and the stator structure of the current collector is connected to the tower.

The current collecting device comprises a stator structure which is relatively fixed and a rotor structure which rotates relative to the stator structure, wherein the stator structure is provided with a conductive piece, the conductive piece comprises a mounting disc and a rolling body, a rolling groove is formed in the mounting disc, the rolling body can be movably arranged in the rolling groove, and the rolling body is in conductive communication with the mounting disc; the rotor structure is rotationally connected with the stator structure, and the rotor structure is provided with a conductive surface, and the conductive surface is in rolling butt with the rolling body, so that the rotor structure is in conductive communication with the conductive piece through the rolling body, and when the rotor structure rotates relative to the stator structure, the rolling body can move in the rolling groove. The rolling body is used for transmitting current from the rotor structure to the stator structure, so that the current collector can dynamically transmit current, and compared with a traditional conductive mode, the rolling body conductive structure simplifies the structure of the current collector, enhances the stability of the whole current collector, enables the current collector to be more easily overhauled, and prolongs the service life.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a conductive member according to an embodiment of the utility model;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic diagram of a conductive member according to another embodiment of the present utility model;

FIG. 4 is a schematic diagram of a stator structure according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram showing a rotor structure according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a current collector according to an embodiment of the utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Current collector	141	Containing cavity
1	Stator structure	15	Cable seat
				11	Conductive member	151	Cable with improved cable characteristics
111	Mounting plate	2	Rotor structure
				1111	Rolling groove	21	Rotor seat
1112	Oil guide groove	22	Rotor part
				1113	Annular groove	221	Abutment projection
112	Rolling element	23	Fork assembly
				1121	Heat dissipation groove	24	Connection row
13	Copper bar	241	Copper braid
				14	Stator base	3	Locking assembly

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In order to ensure the maximization of the power generation efficiency, the wind power generator needs to continuously perform yaw motion to align with the wind direction, so that the wind power cabin can rotate relative to the tower, and at the moment, the dynamic transmission of current is required to be realized between the rotating wind power cabin and the fixed tower through the collector ring structure.

At present, the current collecting ring structure realizes the dynamic transmission of current by the relative rotation of the conductive media which are in contact with each other, such as the rotation contact of the carbon brush and the metal or the rotation contact of the carbon brush and the carbon brush, but the long-time rotation operation of the wind power generator often causes the long-time friction of the two conductive media which are in contact with each other to generate more heat, and the whole safety and reliability of the current collecting ring structure are reduced along with the passing of large current. In the related art, the special cooling device is arranged to radiate and cool the collector ring structure, but the cooling device is arranged to make the whole structure of the collector ring complex and difficult to install and maintain.

In addition, besides a large current line output by the fan, a plurality of control lines and power transmission lines are connected between the tower bottom and the tower top fan, and the slip ring technology in the related technology cannot meet the requirement that all lines are connected through slip rings, and after the fan operates for a period of time, the fan is required to be stopped for cable disconnection so as to avoid cable twist-off. Meanwhile, the conductive slip ring structure in the related art is often complex in structure, easy to wear, unstable enough, difficult to install and overhaul or not suitable for the use condition of high current.

Referring to fig. 1 to 6 in combination, in the embodiment of the present utility model, the current collecting device 100 is used for transmitting current, the current collecting device 100 includes a stator structure 1 and a rotor structure 2, the stator structure 1 is provided with a conductive member 11, the conductive member 11 includes a mounting plate 111 and a rolling element 112, the mounting plate 111 is provided with a rolling groove 1111, and the rolling element 112 is movably disposed in the rolling groove 1111; the rotor structure 2 is rotationally connected with the stator structure 1, the rotor structure 2 is provided with a conductive surface, the conductive surface is in rolling contact with the rolling bodies 112, and the rotor structure 2 is in conductive communication with the stator structure 1 through the rolling bodies 112 and the mounting plate 111; in this case, when the rotor structure 2 rotates relative to the stator structure 1, the rolling elements 112 move in the rolling grooves 1111.

In this embodiment, as shown in fig. 4 to 6, the current collecting device 100 is applied to a wind generating set, the wind generating set includes a tower fixedly arranged and a nacelle capable of rotating with a yaw device relative to the tower, the current collecting device 100 is arranged at a rotation connection position of the nacelle and the tower, the current collecting device 100 includes a stator structure 1 and a rotor structure 2, wherein the stator structure 1 is arranged on the tower and is kept fixed, and the rotor structure 2 is arranged in the nacelle and is rotatably connected with the stator structure 1.

Further, as shown in fig. 1 to 3, the stator structure 1 is provided with a conductive member 11, the conductive member 11 includes a mounting plate 111 and a rolling element 112, and a rolling groove 1111 is formed in the mounting plate 111, so that the rolling element 112 is movably disposed in the rolling groove 1111. It is to be understood that the mounting plate 111 is provided with the rolling groove 1111 for placing and mounting the rolling elements 112, and the mounting plate 111 may be a mounting table or a mounting frame, etc., which is not limited herein; the mounting plate 111 is in conductive communication with the rolling elements 112 such that conductive communication with the mounting plate 111 is also achieved when the rolling elements 112 move in the rolling grooves 1111 relative to the mounting plate 111; compared with the traditional carbon brush conductive structure, the arrangement of the rolling bodies 112 has higher wear resistance and better conductive performance, so that the service life of the current collecting device 100 can be prolonged, the overhaul and maintenance frequency can be reduced, and meanwhile, the rolling bodies 112 can adapt to large-current transmission, and the current transmission efficiency is improved; also, the arrangement of the rolling grooves 1111 and the rolling elements 112 makes the rotation of the rotor structure 2 relative to the stator structure 1 more stable, and thus makes the transmission of the current more stable.

As shown in fig. 1, a copper bar 13 is disposed on a side of the mounting plate 111 opposite to the side on which the rolling bodies 112 are disposed, the copper bar 13 is in conductive communication with the mounting plate 111, the copper bar 13 is used for transmitting current in the conductive member 11, and the copper bar 13 may be selected from copper bars, spring plates, conductive connection plates, and the like, which is not limited herein; optionally, each mounting plate 111 further includes a plurality of copper bars 13, and the plurality of copper bars 13 are disposed at intervals along the circumferential direction of the mounting plate 111, so as to facilitate the current collector device 100 to transmit a large current. Stator structure 1 still includes cable seat 15 and cable, and cable seat 15 is located the one end that rotor structure 2 was kept away from to mounting disc 111, and the one end and the copper bar 13 of cable are connected, and the other end of cable is fixed in cable seat 15, through setting up cable seat 15 to conveniently utilize cable seat 15 to realize the installation fixed to a plurality of cables, and realize the sequential connection of cable, avoid the cable to be mixed and disorderly.

In another embodiment of the present utility model, the stator structure 1 is further provided with a temperature sensor, the temperature sensor is disposed on a side of the mounting plate 111 facing away from the rotor structure 2 and is disposed adjacent to the copper bar 13, and the temperature sensor is used for detecting the working temperatures of the conductive member 11 and the stator structure 1, and transmitting a temperature signal, so as to monitor the working temperature of the current collecting device 100 in real time, and prevent the temperature of the current collecting device 100 from rising too high; it will be appreciated that the temperature sensor may be fixed to the copper bar 13 or may be fixed to the mounting plate 111, and the detection probe of the temperature sensor may directly abut against the copper bar 13 or may be disposed close to the copper bar 13, which is not limited herein.

In the present embodiment, as shown in fig. 4 to 6, the rotor structure 2 is rotatably connected to the stator structure 1, and a conductive surface is formed on a side of the rotor structure 2 facing the stator structure 1, the conductive surface being in rolling contact with the rolling bodies 112 provided in the mounting plate 111. And the conductive surface is also in conductive communication with the rolling elements 112. It will be appreciated that the rotor structure 2 rotates with the nacelle in the wind power plant and that the rotor structure 2 is electrically connected to the generator in the nacelle for transmitting the current generated by the wind power plant; the rotor structure 2 is in conductive communication with the rolling bodies 112 through the conductive surfaces, so that the conductive communication between the rotor structure 2 and the stator structure 1 is realized, and when the rotor structure 2 rotates relative to the stator structure 1, the rolling bodies 112 also move in the rolling grooves 1111, so that when the rotor structure 2 rotates relative to the stator structure 1, the current can be ensured to be transmitted from the rotor structure 2 to the stator structure 1, and the dynamic stable transmission of the current is realized.

The current collecting device 100 of the present technical solution is used for dynamically transmitting current for a wind generating set, the current collecting device 100 includes a relatively fixed stator structure 1 and a rotor structure 2 rotating relative to the stator structure 1, the stator structure 1 is provided with a conductive member 11, the conductive member 11 includes a mounting plate 111 and a rolling element 112, a rolling groove 1111 is formed in the mounting plate 111, such that the rolling element 112 can be movably arranged in the rolling groove 1111, and the rolling element 112 is electrically connected with the mounting plate 111; the rotor structure 2 is rotatably connected with the stator structure 1, the rotor structure 2 is provided with a conductive surface, and the conductive surface is in rolling abutment with the rolling bodies 112, so that the rotor structure 2 is in conductive communication with the stator structure 1 through the rolling bodies 112 and the mounting plate 111, and the rolling bodies 112 can move in the rolling grooves 1111 when the rotor structure 2 rotates relative to the stator structure 1. In the utility model, the rolling bodies 112 are used for transmitting the current from the rotor structure 2 to the stator structure 1, so that the current collector 100 can dynamically transmit the current, and compared with the traditional carbon brush conductive structure, the rolling body 112 conductive structure not only simplifies the structure of the current collector 100, but also enhances the stability of the whole current collector 100, so that the current collector 100 is easier to overhaul and the service life is prolonged on the basis of realizing the dynamic conduction of the rotor structure 2 and the stator structure 1.

In an embodiment, the mounting plate 111 and the rolling elements 112 are electrical conductors, and the conductive surfaces are in electrical communication with the rolling elements 112 to achieve electrical communication of the rotor structure 2 with the conductive members 11; or, the inner peripheral wall of the rolling groove 1111 is provided with a conductive layer, the rolling element 112 is an electrical conductor, the rolling element 112 is in conductive communication with the conductive layer, and the conductive surface is in conductive communication with the rolling element 112, so that the rotor structure 2 is in conductive communication with the conductive member 11.

It can be understood that, as shown in fig. 1 to 3, the mounting plate 111 and the rolling element 112 are both conductive bodies, and the materials of the mounting plate 111 and the rolling element 112 may be silver, copper, iron or aluminum, so that when the rolling element 112 moves in the rolling groove 1111, the rolling element 112 is always in conductive communication with the mounting plate 111, and when the rotor structure 2 is in rolling contact with and conductive communication with the rolling element 112 through the conductive surface, the rotor structure 2 is also in conductive communication with the mounting plate 111, thereby realizing dynamic current transmission of the rotor structure 2 and the stator structure 1; in addition, the installation disc 111 and the rolling bodies 112 are both arranged as electric conductors, so that the rotor structure 2 directly transmits current to the installation disc 111 through the rolling bodies 112, and then the current is transmitted to an external electricity storage device or an electric network through a cable electrically connected with the copper bars 13, and the current collecting device 100 can adapt to the transmission of large current.

In another embodiment of the present utility model, the inner peripheral wall of the rolling groove 1111 is provided with a conductive layer, which may be a conductive coating layer or a conductive coating layer, which is not limited herein; the inner peripheral wall comprises a bottom wall and a side wall of a rolling groove 1111, a conductive layer is electrically connected with a copper bar 13 arranged on a mounting plate 111, a rolling body 112 is an electric conductor, the rolling body 112 is placed in the rolling groove 1111 and is in conductive abutting joint with the conductive layer, and meanwhile, a rotor structure 2 is in rolling abutting joint with the rolling body 112 through a conductive surface and is in conductive communication, so that dynamic current transmission of the rotor structure 2 and a stator structure 1 is realized; the arrangement of the conductive layer can avoid that when the mounting plate 111 is made of conductive materials, the electrical gap between the conductive surface and the mounting plate 111 is small, partial discharge is generated, and when the current passes through the gap instantaneously, the gap is possibly ionized and broken down, so that flashover and creeping are caused, faults such as short circuit and the like are generated, and the electrical safety performance of the current collecting device 100 is improved.

In one embodiment, the rolling element 112 is formed with a cavity, the surface of the rolling element 112 is provided with a heat dissipation groove 1121 communicated with the cavity, and the heat dissipation groove 1121 is spirally arranged and extends along the extending direction of the rolling groove 1111.

It can be understood that, as shown in fig. 2, the rolling elements 112 are hollow and form a cavity, and the cavity is at two ends along the extending direction of the rolling groove 1111 and is communicated with the external space, so that after the rolling elements 112 move in the rolling groove 1111 for a long time, the generated heat can be discharged to the external space through the openings at the two ends of the cavity, which is beneficial to heat dissipation of the conductive member 11 and the whole current collector 100; further, a heat dissipation groove 1121 communicating with the cavity is provided on the surface of the rolling element 112, and the heat dissipation groove 1121 extends along the extending direction of the rolling groove 1111 in a spiral shape, and the heat dissipation groove 1121 is provided, so that the heat dissipation capability of the rolling element 112 is further improved on the basis of ensuring the structural strength of the rolling element 112, that is, on the basis of ensuring that the rolling element 112 has a certain supporting function on the rotor structure 2, so that the generated heat can be discharged to the external space through the heat dissipation groove 1121 in the moving process of the rolling element 112.

In one embodiment, the plurality of rolling grooves 1111 is provided, the rotor structure 2 has a rotation axis, the plurality of rolling grooves 1111 are annularly arranged around the rotation axis, and the plurality of rolling grooves 1111 are annularly spaced; the rolling elements 112 are disposed in plural corresponding rolling grooves 1111, such that each rolling element 112 rolls in one rolling groove 1111, and the rolling elements 112 roll along the tangential direction of the ring shape.

In this embodiment, as shown in fig. 1 to 3, the rotor structure 2 has a rotation axis that rotates relative to the stator structure 1, that is, the rotation axis is a rotation axis when the rotor structure 2 rotates, a plurality of rolling grooves 1111 are provided on the mounting plate 111, the plurality of rolling grooves 1111 are disposed in a ring shape around the rotation axis, that is, the plurality of rolling grooves 1111 are disposed in a circular shape centering on the rotation axis, the plurality of rolling grooves 1111 are disposed at intervals along the ring shape, and the rolling bodies 112 are provided in a plurality of corresponding rolling grooves 1111.

It can be understood that each rolling groove 1111 is provided with one rolling element 112, and the rolling elements 112 are annularly distributed with the rotation axis as the center, and the rolling elements 112 are arranged along the annular space, so that the contact between the conductive surface in the rotor structure 2 and the rolling elements 112 is more stable, the rotation of the rotor structure 2 and the operation of the current collecting device 100 are more stable, and meanwhile, the arrangement of the rolling elements 112 can improve the current transmission efficiency from the rotor structure 2 to the stator structure 1, and improve the large current transmission capability of the current collecting device 100.

In addition, the plurality of rolling elements 112 are arranged at annular intervals, and are convenient to be matched with the rotor structure 2 rotating around the rotation axis, so that the rolling elements 112 roll along the annular tangential direction in the rolling groove 1111, and the rolling direction of the rolling elements 112 in the rolling groove 1111 is different along with the different rotation directions of the rotor structure 2, and the rolling elements can roll clockwise along the annular tangential direction or anticlockwise along the annular tangential direction, thereby realizing the forward and backward rotation of the current collector 100 and improving the flexibility and applicability of the current collector 100.

In one embodiment, each rolling groove 1111 is extended in a direction perpendicular to and away from the rotation axis, such that the plurality of rolling grooves 1111 are radially disposed centering on the rotation axis.

It will be appreciated that, as shown in fig. 1 and 3, the rolling grooves 1111 are disposed in a direction perpendicular to the rotation axis and extend in a direction away from the rotation axis, so that the plurality of rolling grooves 1111 are radially distributed with the rotation axis as the center, that is, the rolling grooves 1111 extend radially in the above-mentioned ring shape and have a certain length, so that the rolling bodies 112 can extend radially in the ring shape in the rolling grooves 1111, and thus, the plurality of rolling bodies 112 can be more suitable for the rotation of the rotor structure 2, and can provide effective and comprehensive support for the rotor structure 2 at both the end adjacent to the rotation axis and the end far from the rotation axis, thereby ensuring the stability of the connection of the rotor structure 2 with the stator structure 1, and the stability of the rotor structure 2 during rotation.

In an embodiment, the plurality of rolling grooves 1111 are spaced apart in a direction away from the rotation axis, and the plurality of rolling grooves 1111 form a plurality of rings concentrically arranged centering on the rotation axis;

alternatively, the cross section of the rolling groove 1111 in the rotation axis direction is rectangular, and the rolling element 112 is a cylinder;

alternatively, the cross section of the rolling groove 1111 along the rotation axis direction is trapezoidal, and the rolling body 112 is a frustum;

alternatively, the rolling groove 1111 has a circular cross section along the rotation axis direction, and the rolling element 112 is a sphere.

In the present embodiment, the plurality of rolling grooves 1111 are also arranged at intervals in the radial direction of the ring shape on the basis of being arranged at intervals in the ring shape direction, so that the plurality of rolling grooves 1111 form a plurality of ring shapes centering on the rotation axis, and in the adjacent two ring shapes, the adjacent rolling grooves 1111 are arranged at intervals in a straight line in the radial direction or at intervals in the radial direction.

It will be appreciated that the plurality of rolling grooves 1111 are formed with a plurality of rings, so that more rolling bodies 112 can be disposed on the surface of the mounting plate 111 to improve the bearing capacity of the rotor structure 2 and effectively improve the capacity of the current collector 100 to transmit large current, meanwhile, the cross section of the rolling grooves 1111 along the rotation axis direction may be rectangular, trapezoidal or circular, the corresponding rolling bodies 112 may be cylinders, cones or spheres, and the rolling bodies 112 roll clockwise or counterclockwise along the tangential direction of the rings.

In an embodiment, the mounting plate 111 is further provided with an oil guiding groove 1112, the oil guiding groove 1112 is communicated with the rolling groove 1111, and the oil guiding groove 1112 and the rolling groove 1111 are used for containing grease.

It will be appreciated that, as shown in fig. 1 to 3, the mounting plate 111 is provided with an oil guiding groove 1112 which is communicated with a plurality of rolling grooves 1111, the oil guiding groove 1112 is annularly arranged with the rotation axis as the center, and the oil guiding groove 1112 and the rolling grooves 1111 are used for containing grease, so that friction between the rolling elements 112 and the side walls of the rolling grooves 1111 is smaller, rolling of the rolling elements 112 is smoother, heat generated by the rolling elements 112 in the rolling process is less, friction force generated when the rotor structure 2 is in rolling abutting contact with the rolling elements 112 is reduced, and heat generation is reduced.

In one embodiment, the rotor structure 2 has a rotation axis, the side of the mounting plate 111 facing the rotor structure 2 is provided with an annular groove 1113, the annular groove 1113 is arranged around the rotation axis, the rolling groove 1111 is arranged at the bottom wall of the annular groove 1113, and the rolling body 112 protrudes out of the notch of the rolling groove 1111 and extends into the annular groove 1113; the rotor structure 2 is provided with an abutment protrusion 221, and a side of the abutment protrusion 221 facing the stator structure 1 forms a conductive surface, and the abutment protrusion 221 protrudes into the annular groove 1113 and rolls against the rolling body 112 via the conductive surface.

In the present embodiment, as shown in fig. 1 to 3, an annular groove 1113 provided around the rotation axis is provided on the side of the mounting plate 111 facing the rotor structure 2, at this time, a rolling groove 1111 is provided on the bottom wall of the annular groove 1113, and a rolling body 112 is provided in the rolling groove 1111 and extends into the annular groove 1113 partially through the notch of the rolling groove 1111, being in contact with the conductive surface of the rotor structure 2, which is provided on the side of the contact protrusion 221 facing the annular groove 1113.

In another embodiment of the present utility model, the rolling grooves 1111 may be formed on a side wall of the annular groove 1113, such as a side wall of the annular groove 1113 adjacent to the rotation axis and/or a side wall of the annular groove 1113 distant from the rotation axis, where the rolling grooves 1111 extend along the rotation axis, and the rolling elements 112 are circumferentially spaced around the rotation axis, and the conductive surfaces are formed on a side wall of the abutment protrusion 221, so that the conductive surfaces are in rolling abutment with and electrically connected with the rolling elements 112, thereby implementing dynamic current transmission between the rotor structure 2 and the stator structure 1.

It will be appreciated that the provision of the annular groove 1113 and the abutment protrusion 221 makes the overall structure of the current collector 100 more compact, and improves the accuracy of the fitting between the rotor structure 2 and the stator structure 1, and improves the centering accuracy of the rotor structure 2 when rotating relative to the stator structure 1, and improves the stability of the current collector 100 when operating.

In one embodiment, the rotor structure 2 has a rotation axis, the stator structure 1 includes a stator base 14 and a plurality of conductive members 11, and the plurality of conductive members 11 are concentrically disposed about the rotation axis and are disposed on the stator base 14 at intervals along a direction away from the rotation axis; the rotor structure 2 includes a plurality of rotor members 22, and the plurality of rotor members 22 are disposed in concentric circles, and each rotor member 22 is provided with a conductive surface, so that each conductive surface is in rolling contact with the rolling elements 112 in a ring set.

In this embodiment, as shown in fig. 4 and 6, the stator structure 1 includes a stator base 14 and a plurality of conductive members 11, the stator base 14 provides a mounting base for the plurality of conductive members 11 and the rotor structure 2, the stator base 14 has a cavity 141 with an opening at one end, the plurality of conductive members 11 are arranged in the cavity 141 at intervals of concentric circles with respect to a rotation axis, a gap is formed between two adjacent conductive members 11 to facilitate heat dissipation, the rotor structure 2 is provided with a plurality of rotor members 22 corresponding to the plurality of conductive members 11, the plurality of rotor members 22 are arranged in concentric circles, a conductive surface is provided on a side of each rotor member 22 facing the cavity 141, and one end of the rotor structure 2 with the conductive surface extends into the cavity 141 and is in conductive abutment with the rolling element 112 in the conductive member 11.

It can be understood that the plurality of conductive elements 11, that is, the plurality of mounting plates 111, are disposed in the accommodating cavity 141, and the rotor structure 2 is correspondingly provided with the plurality of rotor elements 22, and is in rolling contact with and electrically connected with the plurality of rolling elements 112 in the plurality of mounting plates 111 through the plurality of conductive surfaces; for reasons of reducing harmonics, improving power generation efficiency, and reducing power transmission loss, in general, a generator in a wind power generation set generates power for three phases, and thus a plurality of conductive members 11 may be provided in three, six, or nine, respectively, for transmitting three-phase currents.

In another embodiment of the present utility model, as shown in fig. 5 and 6, the rotor structure 2 includes a rotor seat 21, the rotor seat 21 covers the opening of the container, and the rotor structure 2 is rotatably connected with the stator structure 1, at this time, a part of the rotor assembly of the rotor structure 2 is accommodated in the accommodating cavity 141, so that the conductive surface is in abutting conduction with the rolling element 112, so that when the rotor structure 2 rotates or rotates relative to the stator structure 1, the conductive surface and the rolling element 112 always maintain rolling contact, so as to realize dynamic power transmission. Each rotor structure 2 further comprises the rotor member 22, the shifting fork assembly 23 and the connecting rows 24, wherein one end of the shifting fork assembly 23 is connected with one side of the rotor member 22, which is opposite to the conductive surface, the other end of the shifting fork assembly 23 is connected with the rotor seat 21, one end of each connecting row 24 is flexibly connected with the rotor member 22 through copper braid 241 wires, and the other end of each connecting row 24 penetrates through the rotor seat 21 and is used for connecting cables.

In the present embodiment, as shown in fig. 5, the rotor members 22 may alternatively be of a circular ring structure, such that the rotors of the plurality of rotor members 22 are arranged in a concentric circular structure having different diameters. The rotor member 22 may be coupled to the rotor base 21 by a yoke assembly 23, thereby improving the coupling stability of the rotor member 22 to the rotor base 21. In order to further improve the connection stability of the rotor and the rotor seat 21, the shifting fork assembly 23 comprises a plurality of shifting fork assemblies 23 which are arranged at intervals along the circumferential direction of the rotor.

Meanwhile, the connection between the connection row 24 and the rotor piece 22 is copper braid 241 flexible connection, the connection mode is beneficial to current transmission, a certain axial movement space of the rotor is provided, and the space adaptability of the structure is improved. Optionally, a plurality of connection rows 24 are connected to each rotor, the plurality of connection rows 24 being spaced apart along the circumference of the rotor.

Optionally, the plurality of connection rows 24 are spirally arranged along the radial direction, that is, the plurality of connection rows 24 of the plurality of rotor members 22 are arranged in a non-overlapping manner along the radial direction, and the plurality of connection rows 24 are spirally arranged along the circumferential direction from the rotor member 22 at the outermost ring to the rotor member 22 at the innermost ring, so that the distance between cables can be increased, the installation can be facilitated, and the breakdown of two poles can be prevented.

Further, the shifting fork assembly 23 comprises a shifting fork seat, a shifting fork rod, a shifting fork sleeve and a compression spring, wherein the shifting fork seat is connected to one side of the rotor piece 22, which is opposite to the electric shock surface, the shifting fork seat is sleeved with the shifting fork rod, the compression spring is arranged between the shifting fork seat and the shifting fork rod, the shifting fork sleeve is sleeved on the shifting fork rod, and one end of the shifting fork rod, which is far away from the shifting fork seat, is connected with the rotor seat 21. In this embodiment, the number of the fork assemblies 23 on each rotor member 22 may be specifically set according to the diameter of the rotor, and the number of the fork assemblies 23 on the plurality of rotors may be the same or different, which is not limited herein. It can be appreciated that by setting the shifting fork assembly 23 to a shifting fork seat, a shifting fork rod, a shifting fork sleeve and a compression spring structure, the rotor and the rotor seat 21 can be firmly connected, and the torque between the rotor seat 21 and the rotor can be transferred to drive the rotor to rotate. At the same time, the compression spring also provides a compression force to ensure a tight fit between the rotor and stator components.

Further, the connection row 24 is flexibly connected with the rotor member 22 through the copper braid 241, the copper braid 241 is in a flexible structure, so that the connection row 24 and the rotor member 22 are flexibly connected, on one hand, the rotor member 22 is in conductive communication with a cable through the copper braid 241 and the connection row 24, and on the other hand, a certain axial movement space is provided for the rotor member 22 through the copper braid 241, so that the space self-adaptability of the rotor structure 2 is increased.

In an embodiment, the conductive member 11 is further provided with a buffer assembly, the buffer assembly includes a buffer member and a support plate, one end of the buffer member is disposed at the bottom wall of the rolling groove 1111 and extends along the direction of the rotation axis, the other end of the buffer member is connected to the support plate, the rolling element 112 is abutted to one side of the support plate facing away from the buffer member, and the buffer assembly is used for providing buffering for the rolling element 112; wherein the rolling elements 112 are in conductive communication with the cushioning assembly.

In this embodiment, the buffer member is an elastic member or other material with a buffering function, one end of the buffer member is disposed at the bottom wall of the rolling groove 1111, and extends along the direction of the rotation axis, one end of the buffer member far away from the bottom wall of the rolling groove 1111 is connected to the supporting plate, and the rolling element 112 abuts against the supporting plate. It will be appreciated that the buffer assembly is configured to provide a buffer for the rolling element 112, and when the conductive surface of the rotor structure 2 abuts against the rolling element 112, the buffer assembly is configured to provide a buffer for the rolling element 112, so as to reduce the impact of the rotor structure 2 on the rolling element 112, and make the rotation of the rotor structure 2 relative to the stator structure 1 smoother, so as to improve the running stability of the current collecting device 100.

In another embodiment of the present utility model, as shown in fig. 4 and 6, the current collecting device 100 further includes a locking component 3, the locking component 3 is connected to an outer wall of the stator structure 1, one end of the locking component 3 is provided with a rolling member, the rotor structure 2 is provided with an electric shock surface, the rotor structure 2 detachably covers an opening of the Yu Rongqiang 141 and is rotatably connected with the stator structure 1, wherein the current collecting device 100 has a locking state that the locking component 3 locks the rotor structure 2 and a releasing state that the locking component 3 releases the rotor structure 2; in the locking state, the rolling element is in rolling contact with the rotor structure 2; in the released state, the rolling elements are remote from the rotor structure 2.

The locking component 3 is arranged on the outer wall of the stator structure 1, so that when the rotor structure 2 covers the cavity opening of the Yu Rongqiang, the rotor structure 2 is locked or positioned on the stator structure 1 by the locking component 3, so that the rotor structure 2 and the stator structure 1 can be positioned and limited in the axial direction, and the rotor structure 2 is not influenced to rotate or rotate relative to the stator structure 1. By arranging the rolling element at one end of the locking component 3, when the current collecting device 100 is in a locking state, the rolling element is in rolling contact with the rotor structure 2, so that the rotor structure 2 can be effectively ensured to rotate or rotate relative to the stator structure 1; in the release state, the rolling element is far away from the rotor structure 2, so that the rotor structure 2 and the stator structure 1 are conveniently detached, the structure is simplified, and the overhaul is convenient. The structure of the locking assembly 3 may be a locking hook structure, or may be other structures capable of locking or releasing the rotor structure 2, and is not limited herein, with specific reference to the prior art. Of course, the locking assembly 3 may also be disposed on the rotor structure 2, so that when the rotor structure 2 is detachably covered on the cavity opening of the cavity 141 of the stator structure 1 and is rotationally connected with the stator structure 1, the stator structure 1 is locked or released by using the locking assembly 3. Optionally, the locking assemblies 3 include a plurality of locking assemblies 3 disposed at intervals along the circumferential direction of the outer wall of the stator structure 1 and disposed around the cavity mouth of the cavity 141.

In another embodiment of the present utility model, as shown in fig. 4 to 6, the current collecting device 100 further includes a weak current slip ring, the rotor structure 2 is further provided with a first through hole, the stator structure 1 is provided with a second through hole corresponding to the first through hole, the second through hole penetrates the mounting plate 111, and the weak current slip ring penetrates the first through hole and the second through hole in sequence.

In the present embodiment, the weak current slip ring is disposed in the center of the entire current collecting device 100. When the current collecting device 100 is installed on the wind generating set, the weak current slip ring is used for power electric transmission and control signal interaction between the top of the wind tower and the base part.

The utility model also provides a wind generating set, which comprises a tower, a cabin and the collector device 100, wherein the cabin is rotationally connected with the tower, the cabin is provided with a generator, a rotor structure 2 of the collector device 100 is arranged in the cabin and is connected with the generator, and a stator structure 1 of the collector device 100 is connected with the tower. The specific structure of the current collector 100 refers to the foregoing embodiments, and since the wind turbine generator set adopts all the technical solutions of all the foregoing embodiments, at least the wind turbine generator set has all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be described in detail herein.

In the present embodiment, the nacelle is rotatably connected to the tower, the nacelle is provided with a generator, the rotor structure 2 of the current collecting device 100 is provided in the nacelle and is connected to the generator, and the stator structure 1 of the current collecting device 100 is connected to the tower. It can be understood that one end of the tower far away from the engine room is fixed on the ground, the current collecting device 100 is arranged at the rotation joint of the tower and the engine room, the engine room is provided with a plurality of fan blades and a yaw device, and the engine room continuously follows the yaw device to rotate in high altitude, so that the fan blades are always aligned with the wind direction, and the wind energy is utilized to generate electricity with maximum efficiency; the stator structure 1 is fixedly arranged on the tower and is electrically connected with external electricity storage equipment or an electric network, the generator arranged in the engine room generates current through the rotation of the fan blades, and the dynamic transmission of the current is realized in the process that the rotor structure 2 rotates relative to the stator structure 1.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A current collecting device for transmitting a current, the current collecting device comprising:

the stator structure is provided with a conductive piece, the conductive piece comprises a mounting plate and a rolling body, the mounting plate is provided with a rolling groove, and the rolling body is movably arranged in the rolling groove; and

the rotor structure is rotationally connected with the stator structure and is provided with a conductive surface, the conductive surface is in rolling contact with the rolling body, and the rotor structure is in conductive communication with the conductive piece through the rolling body;

when the rotor structure rotates relative to the stator structure, the rolling bodies move in the rolling grooves.

2. The current collector of claim 1 wherein said mounting plate and said rolling elements are electrical conductors, said conductive surfaces in electrical communication with said rolling elements to effect electrical communication of said rotor structure with said conductive members;

or, the inner peripheral wall of the rolling groove is provided with a conductive layer, the rolling body is a conductive body, the rolling body is in conductive communication with the conductive layer, and the conductive surface is in conductive communication with the rolling body, so that the rotor structure is in conductive communication with the conductive piece.

3. The current collector according to claim 2, wherein the rolling element is formed with a cavity, and a heat dissipation groove communicating with the cavity is provided on a surface of the rolling element, and the heat dissipation groove is spirally provided and extends in an extending direction of the rolling groove.

4. The current collecting device according to claim 1, wherein a plurality of the rolling grooves are provided, the rotor structure has a rotation axis, the plurality of the rolling grooves are arranged in a ring shape around the rotation axis, and the plurality of the rolling grooves are arranged at intervals along the ring shape;

the rolling bodies are arranged in a plurality of corresponding rolling grooves, so that each rolling body rolls in one rolling groove, and rolls along the tangential direction of the ring.

5. The current collector according to claim 4, wherein each of the rolling grooves is provided to extend in a direction perpendicular to and away from the rotation axis such that a plurality of the rolling grooves are provided radially with respect to the rotation axis.

6. The current collecting device according to claim 5, wherein a plurality of the rolling grooves are provided at intervals in a direction away from the rotation axis, and the plurality of the rolling grooves form a plurality of the annular shapes concentrically provided with the rotation axis as a center;

and/or the section of the rolling groove along the direction of the rotation axis is rectangular, and the rolling body is a cylinder;

and/or the section of the rolling groove along the direction of the rotation axis is trapezoid, and the rolling body is a frustum body;

and/or the cross section of the rolling groove along the direction of the rotation axis is circular, and the rolling body is a sphere.

7. The current collector according to any one of claims 1 to 6, wherein the mounting plate is further provided with an oil guiding groove which communicates with the rolling groove, and the oil guiding groove and the rolling groove are used for containing grease.

8. The current collecting device according to any one of claims 1 to 6, wherein the rotor structure has a rotation axis, an annular groove is provided on a side of the mounting plate facing the rotor structure, the annular groove is provided around the rotation axis, the rolling groove is provided on a bottom wall of the annular groove, and the rolling body protrudes out of a notch of the rolling groove and into the annular groove;

the rotor structure is provided with an abutting bulge, one side of the abutting bulge facing the stator structure forms the conductive surface, and the abutting bulge stretches into the annular groove and is in rolling abutting connection with the rolling body through the conductive surface.

9. The current collecting device according to any one of claims 1 to 6, wherein the rotor structure has a rotation axis, the stator structure includes a stator base and a plurality of the conductive members, and the plurality of conductive members are concentrically arranged about the rotation axis and are provided at intervals in a direction away from the rotation axis in the stator base;

the rotor structure comprises a plurality of rotor pieces, the rotor pieces are arranged in concentric circles, and each rotor piece is provided with a conductive surface so that each conductive surface is in rolling butt joint with the rolling body in one rolling groove.

10. A wind power generation set, the wind power generation set comprising:

a tower;

the engine room is rotationally connected with the tower, and is provided with a generator; a kind of electronic device with high-pressure air-conditioning system

A current collector as claimed in any one of claims 1 to 9, the rotor structure of the current collector being provided in the nacelle and being connected to the generator, the stator structure of the current collector being connected to the tower.