CN111425360A

CN111425360A - Large-scale vertical magnetic suspension windmill

Info

Publication number: CN111425360A
Application number: CN202010435836.XA
Authority: CN
Inventors: 赵东楼; 卢海; 赵珊珊; 严文龙; 丁钉
Original assignee: ANHUI KANGDINA ELECTRIC POWER TECHNOLOGY CO LTD
Current assignee: ANHUI KANGDINA ELECTRIC POWER TECHNOLOGY CO LTD
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-07-17

Abstract

The invention provides a large-scale vertical magnetic suspension windmill, which comprises a vertically arranged windmill turret, wherein the windmill turret comprises a vertically arranged rotating shaft, a vane plate is connected to the side of the rotating shaft, the vane plate is blown by wind power to drive the rotating shaft to rotate, the torque output end at the lower end of the rotating shaft is used for connecting an energy conversion device, the rotating shaft body at the upper part and/or the lower part of the vane plate is connected into a radial bearing, the radial bearing is arranged on a rack and radially supports and supports the rotating shaft, one of a first magnetic unit and a second magnetic unit is connected with the rotating shaft, the other magnetic unit is connected with the rack, and the first magnetic unit and the second magnetic unit are matched with each other to provide suspension magnetic force for offsetting the gravity of the rotating shaft and the. The gravity of the rotating shaft and the connected fan blade plate in the scheme is borne by the magnetic force between the first magnetic unit and the second magnetic unit without being borne by a radial bearing, so that the increase of the rotating friction force caused by the abrasion of the radial bearing is avoided, the energy conversion rate is reduced, and the friction force is smaller when the magnetic suspension end rotates, so that the energy conversion rate is favorably improved.

Description

Large-scale vertical magnetic suspension windmill

Technical Field

The invention relates to the technical field of wind energy utilization, in particular to a windmill.

Background

With the rapid development of economy, the consumption speed of energy is also increasing, the shortage of energy becomes a problem which is becoming more and more serious day by day, wind energy is more and more paid attention to by people as a renewable energy source, at present, wind energy is mainly converted into mechanical energy through a windmill and then converted into electric energy through a generator to be utilized, and the windmill can also be directly used as a power mechanism of other devices.

The turret of the large-scale windmill is vertically arranged, namely the turret shaft is vertically arranged, the plate surface of the wind blade plate is positioned in the vertical plane, the wind blade plate rotates when revolving, the weight of the turret comprising the wind blade plate and the turret shaft can be considerable, and how to support the rotating shaft is an inevitable design problem.

Disclosure of Invention

The invention aims to provide a large vertical magnetic suspension windmill, which optimizes the gravity bearing and radial constraint positioning.

In order to achieve the purpose, the invention adopts the technical scheme that: a large vertical magnetic suspension windmill comprises a vertically arranged windmill turret, wherein the windmill turret comprises a vertically arranged rotating shaft, a vane plate is connected to the side of the rotating shaft, the vane plate is blown by wind power to drive the rotating shaft to rotate, the torque output end at the lower end of the rotating shaft is used for being connected with an energy conversion device, the shaft body of the rotating shaft at the upper part and/or the lower part of the vane plate is connected into a radial bearing, the radial bearing is arranged on a rack and used for radially supporting and supporting the rotating shaft, one of a first magnetic unit and a second magnetic unit is connected with the rotating shaft, the other magnetic unit is connected with the rack, and the first magnetic unit and the second magnetic unit are matched with each other to provide suspension magnetic force for offsetting the rotating shaft and the.

The gravity of the rotating shaft and the connected fan blade plate in the scheme is borne by the magnetic force between the first magnetic unit and the second magnetic unit without being borne by a radial bearing, so that the increase of the rotating friction force caused by the abrasion of the radial bearing is avoided, the energy conversion rate is reduced, and the friction force is smaller when the magnetic suspension end rotates, so that the energy conversion rate is favorably improved.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIGS. 2 and 3 are schematic structural views of the present invention;

fig. 4, 5 and 9 are schematic structural views of a windmill base;

FIG. 6 is a cross-sectional view taken along plane A-A of FIG. 5;

fig. 7 and 10 are schematic disassembly views of a windmill base;

fig. 8 is a working principle diagram of the present invention.

Detailed Description

A large-scale vertical magnetic suspension windmill comprises a vertically arranged windmill turret, wherein the windmill turret comprises a vertically arranged rotating shaft 30, a vane plate 50 is connected to the side of the rotating shaft 30, the vane plate 50 is blown by wind power to drive the rotating shaft 30 to rotate, the lower end torque output end of the rotating shaft 30 is used for being connected with an energy conversion device, the upper and/or lower rotating shaft 30 shaft body of the vane plate 50 is arranged in a radial bearing, the radial bearing is arranged on a frame 90 and is used for carrying out radial supporting support on the rotating shaft 30, one of a magnetic unit I, a magnetic unit II A, B is connected with the rotating shaft 30, the other magnetic unit is connected with the frame 90, and the magnetic unit I, the magnetic unit II A, B are matched with each other to provide suspension magnetic force for offsetting the gravity of the rotating shaft 30 and the connected vane.

The gravity of the rotating shaft 30 and the connected vane plate 50 in the above scheme is borne by the magnetic force between the magnetic units i and ii A, B, and a radial bearing is not needed to bear the gravity, but the radial bearing supports and supports the rotating shaft 30 in a radial direction, which is very important for a large-scale fan, because the weight of the turret formed by the rotating shaft 30 and the vane plate 50 is large, and the weight can reach several tons or even more than ten tons according to specific specifications, if an end face bearing is adopted to bear the heavy load and maintain a continuous rotating working state, the service life of the bearing is difficult to guarantee, and even through the specification and the material of the bearing are improved, the volume of the bearing is also increased remarkably, and the cost is difficult to reduce. Therefore, the invention selects a magnetic suspension scheme to bear the weight of the turret, and the positioning of the rotating shaft core is borne by the radial bearing. The magnetic suspension mechanism avoids the increase of rotation friction force caused by the abrasion of a radial bearing so as to reduce the energy conversion rate, the friction force is smaller when the magnetic suspension end rotates, the conversion rate of energy is favorably improved, the first magnetic unit and the second magnetic unit A, B can be permanent magnets, electromagnets can be adopted when the overall weight of the windmill is too large, and one of the magnetic units is connected with the rack 90 because the magnetic unit is closer to the rack 90 in the invention, and the essence is that one of the magnetic units is fixedly connected with the ground.

And a holding brake device 36 for limiting the rotation of the rotating shaft 30 is arranged between the rotating shaft 30 and the frame 90. The function of holding the brake device 36 tightly is to stop the windmill through the brake device 36 when maintenance is needed, and simultaneously, the potential safety hazard caused by the rotation of the windmill in the process of disassembly and assembly is avoided.

Two

radial bearings

11 and 71 are concentrically arranged on the first supporting platform 80 at intervals up and down, the shaft body of the transition transfer shaft 32 is arranged in the

radial bearings

11 and 71 and forms small-gap movable fit with the inner ring of the bearing, the lower end of the transition transfer shaft 32 is connected with one of a first magnetic unit A and a second magnetic unit B A, B, and the other magnetic unit A or the other magnetic unit B is connected on the first supporting platform 80 in a hanging manner. The movable fit of the small gap is to ensure that the

radial bearings

11 and 71 and the shaft body of the transition connecting shaft 32 avoid transmitting axial force, and can also ensure that the shaft core is eccentric when the transition connecting shaft 32 rotates, so that the stress of the radial bearings is within the bearing capacity range; in addition, when the shaft core of the transition connecting shaft 32 is slightly deviated, the upper and lower

radial bearings

11 and 71 provide radial forces with certain spacing and opposite directions to act on the transition connecting shaft 32 in a bending moment manner to implement the supporting homing; the transition transfer shaft 32 is arranged and matched with the

radial bearings

11 and 71, so that the processing precision of the transition transfer shaft 32 can be guaranteed, the installation is convenient, otherwise, a longer rotating shaft 30 is extremely difficult to process to the required precision, in addition, the assembly process of the transition transfer shaft and the

radial bearings

11 and 71 is difficult to realize in view of the overlong length, the processing is extremely convenient for the transition transfer shaft 32 with the length of about one meter, the installation is not difficult, particularly, in the initial installation, the magnetic unit is not installed completely, and the weight of the transition transfer shaft 32 is temporarily born by the radial bearings, so that the bearing damage can not be caused.

The lower end of the transition transfer shaft 32 connected with the rotating shaft 30 is connected with a lower connecting shaft 33, the lower connecting shaft 33 and the transition transfer shaft 32 are hollow tubular shafts, the lower connecting shaft 33 and the transition transfer shaft 32 are in limited connection in the axial direction and the circumferential direction after being connected in an inserting mode, the lower connecting shaft 33 is connected with one of the first magnetic unit A, B and the second magnetic unit A, B, and a connecting flange is arranged at the lower end of the lower connecting shaft 33. The lower connecting shaft 33 and the transition transfer shaft 32 are hollow tubular structures, so that the self weight can be obviously reduced, sufficient bending resistance and torsion resistance are ensured, the torque obtained by the rotating shaft 30 is ensured to be transmitted from top to bottom, and the generator and other equipment arranged at a low position are driven.

The annular magnetic unit A is concentrically arranged on the peripheral wall of the tubular shaft 34, and the upper end of the tubular shaft 34 is provided with a flange connected with a connecting flange at the lower end of the lower connecting shaft 33. This facilitates the mounting and dismounting of the first magnetic unit a and the lower connecting shaft 33.

The annular magnetic unit II B is coaxially arranged below the magnetic unit I A and is in clearance fit with the tubular shaft 34, and a flange is arranged on the lower end face of the magnetic unit II B and is connected with the first supporting platform 80 through a suspension bolt. Therefore, the lower connecting shaft 33 connected with the tubular shaft 34 can float up and down along the axial direction of the magnetic unit II B under the condition of not contacting the magnetic unit II B, so that equipment abrasion and energy loss caused by contact friction are avoided, meanwhile, a certain position allowance is provided for the position adjustment of the shaft core of the tubular shaft 34, the closer the distance between the magnetic units I and II A, B is, the larger the repulsive force between the magnetic units I and II is, and the stable support can still be kept under the interference of different wind power and wind directions, and the structure is simple and convenient to disassemble and assemble.

The lower extreme of hollow shaft 34 is connected with plug shaft 35, and hollow shaft 34 and plug shaft 35 are hollow tubulose axle and both plug connections back axial, circumference spacing connection, and plug shaft 35 and the concentric connection of brake equipment 36 of holding tightly are provided with the ring flange and are used for connecting energy conversion equipment to hold the brake equipment 36 lower extreme tightly. Since the lower end of the pipe shaft 34 needs to pass through the second magnetic unit B, the flange cannot be directly arranged on the lower end, and therefore, the insertion shaft 35 is arranged to be connected with the flange.

The wind power generation device comprises a rotating seat 10, a rotating shaft 30 serving as a power output shaft is vertically arranged on the rotating seat 10, a rotating frame 40 is fixedly arranged in the circumferential direction of the rotating shaft 30, a wind blade plate 50 is hinged to the rotating frame 40, the axial core direction of a hinge shaft 51 of the wind blade plate 50 is parallel to the axial core direction of the rotating shaft 30, at least two wind blade plates 50 are uniformly arranged in the circumferential direction of the rotating shaft 30 at intervals, the wind blade plate 50 rotates β around the axial core of the hinge shaft 51 when the wind blade plate 50 revolves α around the axial core of the rotating shaft 30, the revolving α direction of the wind blade plate 50 is the same as or opposite to the rotating β direction of the wind blade plate 50, a steering mechanism drives the rotating seat 10 to rotate according to the wind direction, the posture adjustment rotation meets the following adaptation relation, when the plane where the axial core of the wind blade plate 51 and the axial core of the rotating shaft 30 is vertical to the wind direction, the plate surface of one wind blade plate 50 is vertical to the wind direction, when the wind blade plate 50 revolves 180 degrees along with the rotating shaft 30, the wind direction, the wind blade plate 50 is parallel;

in the scheme, when the plane of the axis core of the hinge shaft 51 and the axis core of the rotating shaft 30 is perpendicular to the wind direction, the plate surface of the wind vane plate 50 on one side in the wind direction is perpendicular to the wind direction to face the wind, and the plate surface of the wind vane plate 50 on the other side is parallel to the wind direction to face the wind, so that the windward area of the wind vane plates 50 on the two sides in the wind direction has a huge difference, thereby ensuring that the turning direction of the rotating shaft 30 is unchanged and the rotating torque is maximum, and the wind utilization rate is maximized, the essence of the invention is that the windward area of the wind vane plates 50 is different when the wind vane plates 50 are at different positions through the rotation β of the wind vane plates 50, so that the resultant torque of one side in the wind direction of the rotating shaft 30 is larger than the resultant torque of the other side, thereby realizing the revolution α of the wind vane plates 50 around the axis core of the rotating shaft 30, the revolution 2 of the wind vane plates 50 is accompanied by the rotation β, when the wind vane plates 50 rotate 180 degrees, namely the wind vane plates 50 rotate 90 degrees, namely the wind vane plates 50 rotate at an angle of 39 β degrees, namely, the wind vane plates 50 rotate at an angle of 39 β degrees, so that the wind direction of the wind vane plates 50 is equal to the wind direction, when the windmill rotates, the windmill is still, the windmill rotates, the windmill is kept as the windmill, the windmill rotates, when the windmill rotates, the windmill rotates with the rotating angle of the rotating shaft, the rotating shaft of the windmill rotates with the rotating shaft of the windmill is kept as the rotating shaft, the windmill, the rotating shaft, the windmill is kept as the rotating angle of the rotating shaft, the rotating.

The revolution α of the vane plate 50 and the rotation β of the vane plate 50 relative to the ground have a rotation speed ratio of 2: 1, so that the included angle between the vane plate 50 and the wind direction is consistent when the vane plate rotates to the same position.

The revolution α direction of the vane plate 50 is the same as the rotation β direction of the vane plate 50 relative to the earth, the same revolution β 0 direction of the vane plate 50 as the rotation β direction of the vane plate 50 means that both the revolution α and the rotation β rotate counterclockwise or clockwise when looking down on the windmill, wherein the rotation β direction is the rotation β direction relative to the earth, and the rotation β relative to the earth is equal to the revolution α minus the rotation angle of the rotation β relative to the hinge shaft 51, and the rotation direction of the rotation α relative to the hinge shaft 51 is opposite to the revolution α direction.

When the plane where the axis of the hinge shaft 51 and the axis of the rotating shaft 30 are located is parallel to the wind direction, the included angle between the surface of the wind vane plate 50 and the wind direction is 45 degrees. When the vane plate 50 is at this position, the angle between the front vane plate 50 and the rear vane plate 50 in the wind direction is 90 °, and the vane plate 50 rotates 90 ° when rotating from the front position to the rear position.

And a brake device for limiting the rotation of the rotating seat 10 is arranged on a transmission path between the wind blade plate 50 and the direction adjusting mechanism. When the wind direction is not changed, the rotating seat 10 needs to be limited by the brake device to prevent the rotating seat from deflecting under the action of external force.

The rotating base 10 is fixedly provided with a conical base gear 13 concentric with the rotating shaft 30, a hinge shaft 51 of the fan blade plate 50 is fixedly provided with a conical driven gear 52 concentric with the rotating shaft, two ends of a transmission shaft 60 with the shaft axis direction in the horizontal plane are provided with bevel gears 61 concentric with the rotating shaft, the two bevel gears 61 are respectively meshed with the conical base gear 13 and the conical driven gear 52, the transmission ratio between the conical base gear 13 and the conical driven gear 52 is 2: 1, the conical bottoms of the conical base gear 13 and the conical driven gear 52 are in the same direction, the meshing sides of the two bevel gears 61, the conical base gear 13 and the conical driven gear 52 are positioned on the side of the corresponding gear far away from the rotating shaft 30, and the transmission shaft 60 and other linkage mechanisms in the scheme can be arranged above the fan blade plate 50 and below the fan blade plate 50 through a mechanical structure, so that the linkage of the fan blade plate 50 and a rotation β is simple, convenient and error-free, complex wiring is omitted relative to electric control, the transmission of the shaft is not easy to drop and manage, the conical base gear 13 and the conical driven gear 52 are positioned under the conical driven gear in the revolving direction, and the conical driven gear is arranged under the conical driven gear β.

The direction adjusting mechanism comprises a direction adjusting chain wheel or gear 14 fixedly arranged on the rotating seat 10 in a concentric mode, and the driving mechanism receives a position signal of the wind vane 20 to drive the adjusting chain wheel or gear 14 to rotate along with the wind vane 20. Namely, the power transmission mode of the direction adjusting mechanism is chain transmission or gear transmission, and can also be a worm gear structure, the worm gear structure has the functions of driving and braking positioning at the same time, so that the synchronous rotation of the rotating seat 10 and the wind vane 20 is realized, the driving mechanism forms a certain rotation limit on the rotating seat 10 to prevent the rotation of the rotating shaft 30 from driving the rotating seat 10, the rotating seat 10 can be arranged at the lower part of the rotating shaft 30, and the maintenance and the circuit arrangement are convenient. The scheme not only ensures the realization of the power transmission of the direction adjusting mechanism, but also avoids mutual interference with the rotation of the rotating frame 40 by dislocation.

The rotating frame 40 comprises cantilevers 41 which are arranged corresponding to the upper end and the lower end of the fan blade plate, the inner ends of the cantilevers 41 are of a half-like structure, the outer ends of the cantilevers 41 at the upper end and the lower end are provided with a bearing seat and a radial bearing which are used for supporting a hinge shaft 51, and an axial supporting structure is arranged at the hinge shaft 51 at the outer end of the cantilever 41 and used for offsetting the gravity of the fan blade plate 50. The half structure is the half structure when two vane plates exist, the axial angle occupied by the inner end structure of the single cantilever 41 is 360 degrees divided by the number of the vane plates, only the single cantilever 41 needs to be manufactured during manufacturing and transportation, the half-like structure is convenient to disassemble and assemble, and the axial supporting structure is an axial supporting bearing or a magnetic suspension structure.

An inclined pull rod 42 is arranged between the lower cantilever 41 and the rotating shaft 30, the cantilever 41, the rotating shaft 30 and the inclined pull rod 42 enclose a triangular structure located in a vertical plane, and the lower portion of the wind blade plate 50 is trapezoidal to avoid the position of the inclined pull rod 42. Because the windmill is large in size and the lower cantilever 41 is stressed greatly, the diagonal draw bar 42 is arranged to improve the stress capacity of the diagonal draw bar 42, when the space below the lower cantilever 41 is limited and the diagonal draw bar 42 is not convenient to arrange, the diagonal draw bar 42 can be arranged above the lower cantilever 41, and the lower part of the wind vane plate 50 is designed in an avoidance mode corresponding to the diagonal draw bar 42.

Claims

1. A large-scale vertical magnetic suspension windmill, its characterized in that: the wind power generation device comprises a vertically arranged wind wheel rotating tower, the wind wheel rotating tower comprises a vertically arranged rotating shaft (30), a wind vane plate (50) is connected to the side of the rotating shaft (30), the wind force blows the wind vane plate (50) to drive the rotating shaft (30) to rotate, the lower end torque output end of the rotating shaft (30) is used for being connected with an energy conversion device, the shaft body of the rotating shaft (30) at the upper part and/or the lower part of the wind vane plate (50) is arranged in a radial bearing, the radial bearing is arranged on a rack (90) and is used for carrying out radial supporting and supporting on the rotating shaft (30), one of a first magnetic unit and a second magnetic unit (A, B) is connected with the rotating shaft (30), the other magnetic unit is connected with the rack (90), and the first magnetic unit and the second magnetic unit (A, B) are matched with each other to provide suspension magnetic force for offsetting.

2. The large vertical magnetic levitation windmill of claim 1, wherein: and a holding brake device (36) for limiting the rotation of the rotating shaft (30) is arranged between the rotating shaft (30) and the frame (90).

3. The large vertical magnetic levitation windmill of claim 1, wherein: two radial bearings (11, 71) are concentrically arranged on the first supporting platform (80) at intervals up and down, a shaft body of the transition transfer shaft (32) is arranged in the radial bearings (11, 71) and forms small-gap movable fit with a bearing inner ring, the lower end of the transition transfer shaft (32) is connected with one of a first magnetic unit and a second magnetic unit (A, B), and the other magnetic unit (A) or the magnetic unit (B) is connected to the first supporting platform (80) in a hanging manner.

4. A large vertical magnetic levitation windmill according to claim 1, 2 or 3, characterized in that: the lower end of a transition transfer shaft (32) connected with the rotating shaft (30) is connected with a lower connecting shaft (33), the lower connecting shaft (33) and the transition transfer shaft (32) are hollow tubular shafts, the lower connecting shaft and the transition transfer shaft are in limited connection in the axial direction and the circumferential direction after being connected in an inserting mode, the lower connecting shaft (33) is connected with one of the first magnetic unit and the second magnetic unit (A, B), and a connecting flange is arranged at the lower end of the lower connecting shaft (33).

5. The large vertical magnetic levitation windmill of claim 4, wherein: the annular magnetic unit I (A) is concentrically arranged on the peripheral wall of the tubular shaft (34), and the upper end of the tubular shaft (34) is provided with a flange plate connected with a connecting flange at the lower end of the lower connecting shaft (33).

6. The large vertical magnetic levitation windmill of claim 5, wherein: the annular magnetic unit II (B) is concentrically arranged below the magnetic unit I (A) and forms clearance fit with the tubular shaft (34), a flange plate is arranged on the lower end face of the magnetic unit II (B), and the flange plate is connected with the first supporting platform (80) through a suspension bolt.

7. The large vertical magnetic levitation windmill of claim 6, wherein: the lower extreme of hollow shaft (34) is connected with plug shaft (35), and axial, circumference spacing connection after hollow tubulose axle and both plug connections are managed to hollow tubular axle (34) and plug shaft (35), plug shaft (35) with hold brake equipment (36) concentric coupling, hold brake equipment (36) lower extreme tightly and be provided with the ring flange and be used for connecting energy conversion equipment.