Wind power variable pitch deviceTechnical Field
The application relates to the technical field of wind power generation, in particular to a wind power pitch control device.
Background
Wind power generation is one of the current clean power generation modes, blades are driven to rotate through wind formed in nature, power generation equipment is driven to operate through an accelerating gear set, continuous electric energy is generated, when the wind speed is too high, a variable pitch device in the wind generating set can drive the blades to adjust the moving angle, so that torque generated by air flow to the blades is changed, and the risk that the blades cannot be braked or even disintegrated under the action of huge centrifugal force due to overspeed of rotating speed of the blades is avoided.
The traditional variable pitch device drives the paddles to change the pitch through the power machine and the reduction gear set, when the generator set is in a normal power generation state, the power machine is locked at the moment, the gears cannot rotate to fix the paddles, the paddles cannot rotate independently due to torque generated by air flow, and the variable pitch device with the structure has the advantages of being simple in structure, convenient to use, low in cost and the like, and is the variable pitch device with the most wide application range at present.
Although the existing pitch device has the advantages, certain limitations still exist in the actual use process, as the blade is always subjected to the action of torque in the air flow, the torque can directly act on the meshing position of the transmission gear, the number of gear teeth at the meshing position is small, and under the action of the long-time torque, the gear teeth stressed for a long time are cracked or even broken due to metal fatigue.
Disclosure of Invention
The application provides a wind power generation device, possesses the effect that transmission gear group breaks away from each other when normal electricity generation for solve the situation that the meshing department teeth of a cogwheel appear cracking under the circumstances of long-time atress and collapse even.
In order to achieve the above purpose, the present application adopts the following technical scheme:
the wind power pitch device comprises a main body spherical shell, wherein the front end and the tail end of the main body spherical shell are respectively provided with a connecting round hole for connecting a driving device, the outer surface of the main body spherical shell is provided with base holes for connecting a deflection device and an adjusting device, the base holes are distributed in a ring array mode, the inner wall of the main body spherical shell is fixedly provided with a side plate at a position below the base holes, and the top of the side plate is provided with a limiting hole for connecting the adjusting device at a position close to one end;
specifically, an annular front plate is arranged at a position, close to the front end, of the inner wall of the main body spherical shell, an annular cavity is arranged in the annular front plate, an extrusion cavity is arranged at a position, close to the bottom, of the annular cavity in the annular front plate, an oil inlet hole used for being connected with the annular cavity in the annular front plate is formed at a position, close to the tail end, of the top of the extrusion cavity, an oil outlet communicated with the outside is formed at a position, close to the front end, of the bottom of the extrusion cavity, an oil filler hole communicated with the annular cavity in the annular front plate is formed at a position, close to the top, of the back of the annular front plate, an oil guide nozzle communicated with the inner wall of the base hole is arranged on the outer surface of the main body spherical shell, and the oil filler holes are distributed in an annular array mode;
specifically, the oil outlet is connected with the oil guide nozzle through a pipeline, and lubricating oil is injected into an annular groove in the annular front plate.
Further, the driving device comprises a power machine, the power machine is fixedly arranged in a connecting round hole at the tail end of a main spherical shell, one end of an output shaft of the power machine is fixedly provided with a disc-shaped bevel gear, the disc-shaped bevel gear is meshed with an adjusting device, one side of the disc-shaped bevel gear is fixedly provided with a threaded shaft sleeve I at the center, the interior of the threaded shaft sleeve I is sleeved with a travel shaft in a threaded fit manner, the top and the bottom of the outer surface of the travel shaft are respectively provided with an anti-rolling groove I matched with a central hole of an annular front plate, one end of the travel shaft is fixedly provided with a windward cover, the position, close to the anti-rolling groove I, of the outer surface of the travel shaft is fixedly provided with a connecting arm, one side of the connecting arm is fixedly provided with an extrusion piston, and the extrusion piston is sleeved in the extrusion cavity;
specifically, the back of windward cover is laminated with the connection round hole of main part spherical shell front end mutually, and the laminating face sets up to the inclined plane.
Further, the deflection device comprises a fixed seat ring, the fixed seat ring is fixedly arranged at the top of the base hole through a bolt, a roller used for movably sleeving a rotary base is arranged in the fixed seat ring, annular inner teeth are fixedly sleeved on an inner ring of the rotary base and meshed with the adjusting device, a connecting table is fixedly arranged at the top of the rotary base, and paddles are fixedly arranged at the top of the connecting table.
Further, the adjusting device comprises two semi-annular sliding rails, the semi-annular sliding rails are fixedly arranged at the position, close to the bottom, of the inner wall of a base hole through bolts, the semi-annular sliding rails are connected end to form an annular sliding rail, a rotating disc is movably sleeved on the inner side of the semi-annular sliding rail, an annular bevel gear is fixedly arranged at the bottom of the rotating disc through bolts, the annular bevel gear is meshed with a disc-shaped bevel gear, an annular plate used for connecting a seat ring is arranged at the position, close to the top, of the inner wall of the rotating disc, a mounting base is fixedly arranged on the inner wall of the connecting seat ring through a rod piece, a threaded shaft sleeve II is arranged at the top of the mounting base, a threaded sliding groove is formed in the inner wall of the threaded shaft sleeve II, a locking device is arranged through a sliding groove movable sleeve, a planetary reducer is fixedly arranged at the position, located at one side of the bottom of the threaded shaft sleeve II, and one end of an output shaft of the planetary reducer is fixedly provided with a transmission gear which is meshed with annular inner teeth;
specifically, the semi-annular sliding rail is installed in an eccentric mode, the axis of the semi-annular sliding rail is biased to one side close to the planetary reducer, and the transmission gear and the annular internal teeth are disengaged after the rotating disc rotates for one hundred eighty degrees;
specifically, the oil guide nozzle extends to the inner wall surface of the semi-annular sliding rail.
Further, the locking device comprises a screwing rod, the outer surface of the screwing rod is matched with a threaded sliding groove in the threaded shaft sleeve II, a rolling shaft is fixedly arranged at the bottom of the screwing rod, anti-rolling grooves II matched with limit holes are formed in two sides of the outer surface of the rolling shaft, a connecting shaft sleeve is movably arranged at the top of the screwing rod, the connecting shaft sleeve is connected with the top of the screwing rod through a spring, and a locking piece is fixedly arranged at the top of the connecting shaft sleeve;
specifically, the locking piece is located directly below the annular internal teeth.
The application has the following beneficial effects.
1. When the device is in a normal power generation state, the rotating disc rotates one hundred eighty degrees and then the transmission gear and the annular internal teeth are separated from each other, so that the problem that the gear teeth at the engagement position are cracked or broken due to metal fatigue under the action of huge torque caused by the fact that torque generated by the deflection device under the action of air flow directly acts on the engagement position of the transmission gear and the surface of the annular internal teeth is avoided, and the reliability of the device is improved.
2. When the power machine drives the annular helical gear to drive the rotating disc to rotate, the joint of the top of the locking piece and the bottom of the annular internal tooth realizes the integral fixation of the deflection device, eliminates the problem that the paddle deflects under the action of air flow to reduce the wind power generation efficiency, improves the stability of the device in the operation process, and simultaneously, the fixation mode ensures that the contact surface is positioned on the lower bottom surface of the annular internal tooth, does not influence the gear teeth on the inner side of the annular internal tooth, and improves the reliability of the device.
3. When the power machine drives the disc-type bevel gear and the threaded shaft sleeve I to rotate, the windward cover and the connecting round hole at the front end of the main body spherical shell are in a separated state, and air flow can enter the inside of the main body spherical shell through a gap between the windward cover and the connecting round hole, so that the effect of cooling the inner structure of the main body spherical shell is realized, the problem that electric equipment and control equipment of the device work abnormally due to high temperature is avoided, and the practicability of the device is improved.
4. When the stroke axle takes place to remove under the effect of screw precession, the extrusion piston can extrude the appearance chamber of extrusion intracavity portion for lubricating oil can reach the contact surface between semi-annular slide rail and the rolling disc through oil outlet, oil guide nozzle and connecting tube, avoid the frictional force between semi-annular slide rail and the rolling disc too high and appear unable normal pivoted problem, simultaneously, drive the extrusion piston at the stroke axle and reset the back, lubricating oil in the inside annular cavity of annular front bezel can enter into the inside of extrusion chamber through the inlet port here, realize automatic replenishment, improved the automation of the device.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front elevational view of the structure of the present invention;
FIG. 3 is a cross-sectional view in the direction A and with an enlarged view of the structure of the present invention in FIG. 2;
FIG. 4 is a schematic diagram of the main structure of the present invention;
FIG. 5 is a front view of the body structure of the present invention;
FIG. 6 is a cross-sectional view in the direction B of FIG. 5, which is a block diagram of the present invention;
FIG. 7 is an enlarged view of FIG. 6C, which is a block diagram of the present invention;
FIG. 8 is a schematic diagram of a structural actuator of the present invention;
FIG. 9 is a right side view of the structural actuator of the present invention;
FIG. 10 is a schematic view of a structural deflection unit of the present invention;
FIG. 11 is a front view of the structural deflection unit of the present invention;
FIG. 12 is a cross-sectional view in direction D of FIG. 11 showing the structure of the present invention;
FIG. 13 is a schematic view of a structural adjustment device of the present invention;
FIG. 14 is a top view of the structural adjustment device of the present invention;
FIG. 15 is a cross-sectional view in the E direction of FIG. 14, which is a block diagram of the present invention;
FIG. 16 is a schematic view of a structural locking device of the present invention;
FIG. 17 is a front view of the structural locking device of the present invention;
fig. 18 is a cross-sectional view in the F direction of fig. 17 which is a structural diagram of the present invention.
In the figure; 1. a main body spherical shell; 2. a driving device; 21. a power machine; 22. disc-type bevel gears; 23. a threaded shaft sleeve I; 24. a stroke shaft; 25. anti-rolling groove I; 26. a windward cover; 27. a connecting arm; 28. extruding the piston; 3. a connecting round hole; 4. a deflection device; 41. a fixed seat ring; 42. rotating the base; 43. annular internal teeth; 44. a connection station; 45. a paddle; 5. an adjusting device; 51. a semi-annular slide rail; 52. a rotating disc; 53. an annular helical gear; 54. connecting the seat rings; 55. a mounting base; 56. a threaded shaft sleeve II; 57. a locking device; 571. a screw-in rod; 572. a turning roller; 573. anti-rolling groove II; 574. a connecting shaft sleeve; 575. a locking piece; 58. a planetary reducer; 59. a transmission gear; 6. a base hole; 7. a side plate; 8. a limiting hole; 9. an annular front plate; 10. an extrusion chamber; 11. an oil inlet hole; 12. an oil outlet hole; 13. an oil filling hole; 14. and an oil guide nozzle.
Detailed Description
The following description of the embodiments of the present application 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, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Referring to fig. 1-7, the wind power pitch device comprises a main body spherical shell 1, wherein a connecting round hole 3 for connecting a driving device 2 is respectively arranged at the front end and the tail end of the main body spherical shell 1, a base hole 6 for connecting a deflection device 4 and an adjusting device 5 is formed in the outer surface of the main body spherical shell 1, the base holes 6 are distributed in a ring array manner, a side plate 7 is fixedly arranged at a position, below the base hole 6, of the inner wall of the main body spherical shell 1, and a limiting hole 8 for connecting the adjusting device 5 is formed at a position, close to one end, of the top of the side plate 7;
referring to fig. 1-7, an annular front plate 9 is disposed at a position of the inner wall of the main body spherical shell 1 near the front end, an annular cavity is disposed inside the annular front plate 9, an extrusion cavity 10 is disposed at a position of the annular cavity inside the annular front plate 9 near the bottom, an oil inlet 11 for connecting with the annular cavity inside the annular front plate 9 is disposed at a position of the top of the extrusion cavity 10 near the tail end, an oil outlet 12 communicated with the outside is disposed at a position of the bottom of the extrusion cavity 10 near the front end, an oil filler hole 13 communicated with the annular cavity inside the annular front plate 9 is disposed at a position of the back surface of the annular front plate 9 near the top, oil guide nozzles 14 communicated with the inner wall of the base hole 6 are disposed on the outer surface of the main body spherical shell 1, and the oil filler holes 13 are distributed in an annular array;
referring to fig. 1-7, the oil outlet 12 is connected to the oil nozzle 14 via a pipe, and the annular groove inside the annular front plate 9 is filled with lubricating oil.
Referring to fig. 3, 6 and 8-9, the driving device 2 includes a power machine 21, the power machine 21 is fixedly installed in a connecting round hole 3 at the end of the main body spherical shell 1, a disc type bevel gear 22 is fixedly installed at one end of an output shaft of the power machine 21, the disc type bevel gear 22 is meshed with the adjusting device 5, a threaded shaft sleeve i 23 is fixedly installed at a position of one side of the disc type bevel gear 22 at the center, a travel shaft 24 is sleeved in the threaded shaft sleeve i 23 in a threaded fit manner, rolling-preventing grooves i 25 for being matched with a central hole of the annular front plate 9 are formed in the top and bottom of the outer surface of the travel shaft 24, a windward cover 26 is fixedly installed at one end of the travel shaft 24, a connecting arm 27 is fixedly installed at a position of the outer surface of the travel shaft 24 close to the rolling-preventing grooves i 25, an extruding piston 28 is fixedly installed at a position of one side of the connecting arm 27 close to the bottom, and the extruding piston 28 is sleeved in the extruding cavity 10;
referring to fig. 3, fig. 6 and fig. 8-fig. 9, the back of the windward cover 26 is attached to the connection round hole 3 at the front end of the main spherical shell 1, and the attaching surface is set to be an inclined surface, when the power machine 21 drives the disc-shaped inclined gear 22 and the threaded shaft sleeve i 23 to rotate, the travel shaft 24 is sleeved in the threaded shaft sleeve i 23 in a threaded fit manner, and meanwhile, the anti-rolling grooves i 25 matched with the central hole of the annular front plate 9 are formed in the top and bottom of the outer surface of the travel shaft 24, so that the travel shaft 24 can be in a separated state under the action of screwing in of threads, the windward cover 26 and the connection round hole 3 at the front end of the main spherical shell 1, air can enter the inside of the main spherical shell 1 through a gap between the windward cover 26 and the connection round hole 3, and then is discharged from the connection round hole 3 in the outer surface end of the main spherical shell 1, the internal heat of the main spherical shell 1 is cooled, the problem of the internal structure of the main spherical shell 1 is avoided, and the electrical equipment and control equipment of the device is prevented from working abnormally due to high temperature, and the practicality of the device is improved.
Referring to fig. 6, 10-12, the deflection device 4 includes a fixed seat ring 41, the fixed seat ring 41 is fixedly mounted on the top of the base hole 6 by bolts, rollers for movably sleeving a rotary base 42 are arranged in the fixed seat ring 41, an inner ring of the rotary base 42 is fixedly sleeved with annular inner teeth 43, the annular inner teeth 43 are meshed with the adjusting device 5, a connection table 44 is fixedly mounted on the top of the rotary base 42, and paddles 45 are fixedly mounted on the top of the connection table 44.
Referring to fig. 3, 12 and 13-15, the adjusting device 5 includes two semi-annular slide rails 51, the semi-annular slide rails 51 are fixedly installed on the inner wall of the base hole 6 near the bottom through bolts, the semi-annular slide rails 51 are connected end to form an annular slide rail, a rotating disc 52 is movably sleeved on the inner side of the semi-annular slide rails 51, an annular bevel gear 53 is fixedly installed on the bottom of the rotating disc 52 through bolts, the annular bevel gear 53 is meshed with the disc bevel gear 22, an annular plate for connecting with a seat ring 54 is arranged on the inner wall of the rotating disc 52 near the top, an installation base 55 is fixedly installed on the inner wall of the connection seat ring 54 through a rod, a threaded shaft sleeve ii 56 is arranged on the top of the installation base 55, a threaded sliding groove is formed in the inner wall of the threaded shaft sleeve ii 56, a locking device 57 is movably sleeved on the bottom of the installation base 55 at one side of the threaded shaft sleeve ii, a planetary reducer 58 is fixedly installed on one end of an output shaft of the planetary reducer 58, a transmission gear 59 is fixedly installed on one end of the transmission gear 59, and the transmission gear 59 is meshed with annular inner teeth 43.
Referring to fig. 3, fig. 8 and fig. 10-15, the semi-annular sliding rail 51 is installed in an eccentric manner, the axis of the semi-annular sliding rail 51 is biased to a side close to the planetary reducer 58, and the transmission gear 59 and the annular inner teeth 43 are disengaged from each other after the rotating disc 52 rotates for one hundred eighty degrees.
Referring to fig. 5-6, fig. 9 and fig. 13-15, the oil guide nozzle 14 extends to the inner wall surface of the semi-annular slide rail 51, when the stroke shaft 24 moves under the action of screw thread precession, the extrusion piston 28 is sleeved in the extrusion cavity 10, so that the extrusion piston 28 can extrude the cavity in the extrusion cavity 10, lubricating oil is injected into the annular groove in the annular front plate 9, so that the lubricating oil flows out through the oil outlet 12 under the extrusion action of the extrusion piston 28, at the moment, the oil outlet 12 is connected with the oil guide nozzle 14 through a pipeline, and the oil outlet 12 is connected with the oil guide nozzle 14 through a pipeline, the oil guide nozzle 14 extends to the inner wall surface of the semi-annular slide rail 51, so that the lubricating oil can reach the contact surface between the semi-annular slide rail 51 and the rotating disc 52 through the oil outlet 12, the oil guide nozzle 14 and the connecting pipeline, the problem that abnormal rotation cannot occur due to too high friction force between the semi-annular slide rail 51 and the rotating disc 52 is avoided, the running stability of the device is further improved, meanwhile, after the stroke shaft 24 drives the extrusion piston 28 to reset, the annular cavity in the annular front plate 9 can automatically enter the oil inlet 11 through the inner cavity, and the automatic device is automatically improved.
Referring to fig. 6 and 16-18, the locking device 57 includes a screw rod 571, an outer surface of the screw rod 571 is matched with a threaded sliding groove in the threaded shaft sleeve ii 56, a rolling shaft 572 is fixedly installed at the bottom of the screw rod 571, rolling grooves ii 573 for matching with the limiting holes 8 are formed on two sides of the outer surface of the rolling shaft 572, a connecting shaft sleeve 574 is movably installed at the top of the screw rod 571, the connecting shaft sleeve 574 is connected with the top of the screw rod 571 through a spring, and a locking piece 575 is fixedly installed at the top of the connecting shaft sleeve 574;
referring to fig. 6, 12, 15 and 18, the locking piece 575 is located under the annular internal tooth 43, when the power machine 21 drives the annular helical gear 53 to drive the rotating disc 52 to rotate, the threaded shaft sleeve ii 56 also rotates with the step, and since the anti-rolling grooves ii 573 matched with the limiting hole 8 are formed on two sides of the outer surface of the rolling shaft 572, the anti-rolling grooves ii 573 cannot rotate circumferentially, and the locking device 57 moves along the vertical upward direction under the screwing action of the threaded sliding groove on the outer surface of the screw rod 571, at this time, the locking piece 575 is located under the annular internal tooth 43, so that the joint between the top of the locking piece 575 and the bottom of the annular internal tooth 43 is realized to fix the whole deflecting device 4, the problem that the wind power generation efficiency is reduced due to the deflection of the blade 45 under the action of the air flow is solved, the stability of the device in the operation process is improved, and meanwhile, the fixing mode enables the contact surface to be located on the lower bottom surface of the annular internal tooth 43, the influence on the inner side of the annular internal tooth 43 is avoided, and the reliability of the device is improved.
The application method of the invention is as follows:
when the device is in a normal power generation state, the power machine 21 drives the disc-shaped bevel gear 22 to rotate, at the moment, the annular bevel gear 53 is meshed with the disc-shaped bevel gear 22, so that the annular bevel gear 53 is driven to drive the rotating disc 52 to rotate for one hundred eighty degrees, the axis of the semi-annular sliding rail 51 is deviated to one side close to the planetary reducer 58, the transmission gear 59 and the annular internal teeth 43 are disengaged after the rotating disc 52 rotates for one hundred eighty degrees, torque is eliminated to directly act on the meshing position of the transmission gear 59 and the surface of the annular internal teeth 43, when the power machine 21 drives the annular bevel gear 53 to drive the rotating disc 52 to rotate, the threaded shaft sleeve II 56 also rotates with a step, and as the two sides of the outer surface of the turning roller are provided with anti-rolling grooves II 573 matched with the limiting holes 8, the anti-rolling grooves II 573 cannot rotate circumferentially, and the locking device 57 moves integrally in the vertical upward direction along with the screwing action of the threaded sliding grooves on the outer surface of the threaded sliding grooves of the screw rod 571, so that the top of the locking device 59 is connected with the bottom of the annular internal teeth 43, the whole deflector 4 is fixed, and the paddles 45 are eliminated, and the inner teeth 43 are not influenced by the inner teeth of the annular internal teeth 43.
When the power machine 21 drives the disc bevel gear 22 and the threaded shaft sleeve I23 to rotate, the travel shaft 24 is sleeved in the threaded shaft sleeve I23 in a threaded fit manner, the travel shaft 24 can be in a separated state under the action of threaded screwing, the windward cover 26 and the connecting round hole 3 at the front end of the main spherical shell 1, so that air flow can enter the main spherical shell 1 through a gap between the windward cover 26 and the connecting round hole 3, then is discharged from the connecting round hole 3 in the tail end of the outer surface of the main spherical shell 1, heat in the main spherical shell 1 is taken away, the effect of cooling the internal structure of the main spherical shell 1 is achieved, when the travel shaft 24 moves under the action of threaded screwing, the travel shaft is sleeved in the extrusion cavity 10 through the extrusion piston 28, the extrusion piston 28 can extrude the cavity in the extrusion cavity 10, lubricating oil is injected into the annular groove in the annular front plate 9, the lubricating oil can flow out through the oil outlet 12, the lubricating oil guide nozzle 14 and the connecting pipeline reaches the contact surface between the semi-annular slide rail 51 and the rotating disc 52 under the action of extrusion piston 28.