Propeller hub structure for electric variable pitch propeller
By using the hub structure of the electric variable pitch propeller and connecting the variable pitch motor to the stator, the variable pitch slider moves along the guide rod to adjust the blade angle, which solves the problems of complex structure and high energy consumption of existing variable pitch propellers and achieves efficient and fast pitch adjustment.
Patent Information
- Application Number
- CN202520324787.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Existing variable-pitch propellers have complex structures, long response times, high maintenance costs, and hydraulic systems that increase aircraft weight and energy consumption.
The rotor hub structure of the electric variable pitch propeller is adopted. The variable pitch motor is fixedly connected to the stator. The variable pitch slider moves up and down along the guide rod, which drives the blade angle to deflect, thereby achieving precise adjustment of the propeller pitch, simplifying the structure, and improving response speed and energy efficiency.
It achieves precise pitch adjustment, has a simple structure, fast response, light weight, saves energy, and improves the working efficiency of the pitch-changing mechanism.
Smart Images
Figure CN223751100U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a variable pitch propeller technical field especially a kind of hub structure for electric variable pitch propeller. BACKGROUND
[0002] With the rapid development of aircraft technology, more and more fields are applied, aircraft power source is mostly engine and motor driven constant pitch propeller front pull or rear push scheme, constant pitch propeller is only in the limited speed range higher efficiency, take-off stage sliding distance is long, slow climb, landing stage sliding distance is long, low economy, the existing variable pitch propeller mostly adopts hydraulic variable pitch, complex structure, long response time, the difficulty of component inspection and maintenance is greater, maintenance cost is higher, liquid is arranged in hydraulic pump, the overall weight of aircraft is higher, energy consumption is greater. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in the related art is solved.For this purpose, the utility model provides a kind of hub structure for electric variable pitch propeller, realize the accurate adjustment of pitch, improve the working efficiency of propeller.
[0004] The utility model provides a kind of hub structure for electric variable pitch propeller, it include: upper hub, lower hub, variable pitch mechanism, first guide rod, paddle mechanism and power motor;
[0005] The power motor includes rotor and stator, the rotor is fixedly connected with the lower hub, and the lower hub is fixedly connected with the upper hub through a fixing part;
[0006] The upper end of the first guide rod is inserted with the upper hub, and the lower end of the first guide rod is inserted with the lower hub;
[0007] The variable pitch mechanism includes variable pitch motor, center shaft, moving part and variable pitch slider, the variable pitch motor is arranged at the lower end of the lower hub and is fixedly connected with the stator, the center shaft is parallel to the first guide rod and is fixedly arranged at the upper end of the variable pitch motor, the lower end of the moving part is fixedly connected with the output end of the variable pitch motor, the upper end of the moving part is fixedly connected with the variable pitch slider, the moving part is slidingly matched with the center shaft, and the variable pitch slider is slidingly matched with the first guide rod;
[0008] The paddle mechanism includes paddle and eccentric pin cover plate, the variable pitch slider is rotatably connected with the paddle, and the eccentric pin cover plate is fixedly connected with the root of the paddle and is slidingly matched with the variable pitch slider.
[0009] According to the hub structure for electric variable pitch propeller provided by the utility model, the variable pitch motor is arranged at the upper end of the upper hub and is fixedly connected with the upper hub.
[0010] The propeller hub structure for the electric variable-pitch propeller further comprises a sensor support, an angle sensor and a measuring gear, the sensor support is fixedly connected with the upper propeller hub, the angle sensor is fixedly connected with the sensor support and the measuring gear, and the measuring gear is engaged with the eccentric pin cover plate.
[0011] The propeller hub structure for the electric variable-pitch propeller further comprises an eccentric pin, a matching groove for the eccentric pin to be inserted is formed in the side edge of the variable-pitch sliding block, one end of the eccentric pin is inserted into the side edge of the variable-pitch sliding block, and the other end of the eccentric pin is fixedly connected with the eccentric pin cover plate.
[0012] The propeller hub structure for the electric variable-pitch propeller further comprises a positioning pin, a first positioning hole is formed in the lower end surface of the upper propeller hub, a second positioning hole is formed in the upper end surface of the lower propeller hub, the lower end of the positioning pin is arranged in the second positioning hole, and the upper end of the positioning pin is arranged in the first positioning hole.
[0013] The propeller hub structure for the electric variable-pitch propeller further comprises a motor support, a shaft coupling, a lead screw and a lead screw nut, the motor support is fixedly arranged on the stator, the variable-pitch motor is fixedly connected with the motor support, the lead screw is arranged in the interior of the motor support and connected with the output end of the variable-pitch motor through the shaft coupling, and the lead screw nut is threadedly matched with the lead screw and fixedly connected with the moving part.
[0014] The propeller hub structure for the electric variable-pitch propeller further comprises a torsion arm assembly, the torsion arm assembly comprises an upper torsion arm and a lower torsion arm, the upper torsion arm is fixedly connected with the moving part, the lower torsion arm is fixedly connected with the motor support, and the upper torsion arm and the lower torsion arm are hingedly connected.
[0015] The propeller hub structure for the electric variable-pitch propeller further comprises a second guide rod, the lower end of the second guide rod is fixedly connected with the motor support, and the upper end of the second guide rod is slidingly matched with the moving part.
[0016] The propeller hub structure for the electric variable-pitch propeller further comprises a rotating bearing arranged between the moving part and the variable-pitch sliding block.
[0017] According to the propeller hub structure for the electric variable-pitch propeller, the plurality of arm holes are uniformly arranged on the outer side wall of the upper propeller hub, the propeller blade is rotationally matched with the arm hole, the propeller blade mechanism further comprises a first combined bearing, a second combined bearing, a pressing sleeve and a propeller root clamp sleeve, the arm hole is sleeved at the root of the propeller blade, the pressing sleeve, the second combined bearing, the propeller root clamp sleeve and the first combined bearing are sequentially arranged from inside to outside in the gap between the arm hole and the root of the propeller blade and are all sleeved at the root of the propeller blade, the inner ring of the first combined bearing is in abutment with the shaft shoulder of the root of the propeller blade, and the outer ring of the first combined bearing is in abutment with the boss inside the arm hole.
[0018] The one or more technical solutions in the embodiment of the utility model have at least one of the following technical effects:
[0019] According to the propeller hub structure for the electric variable-pitch propeller, the plurality of arm holes are uniformly arranged on the outer side wall of the upper propeller hub, the propeller blade is rotationally matched with the arm hole, the propeller blade mechanism further comprises a first combined bearing, a second combined bearing, a pressing sleeve and a propeller root clamp sleeve, the arm hole is sleeved at the root of the propeller blade, the pressing sleeve, the second combined bearing, the propeller root clamp sleeve and the first combined bearing are sequentially arranged from inside to outside in the gap between the arm hole and the root of the propeller blade and are all sleeved at the root of the propeller blade, the inner ring of the first combined bearing is in abutment with the shaft shoulder of the root of the propeller blade, and the outer ring of the first combined bearing is in abutment with the boss inside the arm hole.
[0020] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.
[0022] Figure 1 It is one of the structure schematic views of the propeller hub structure for the electric variable-pitch propeller provided by the utility model.
[0023] Figure 2 It is the second structure schematic view of the propeller hub structure for the electric variable-pitch propeller provided by the utility model.
[0024] Figure 3 It is the structure schematic view of the variable-pitch sliding block of the propeller hub structure for the electric variable-pitch propeller provided by the utility model.
[0025] Figure 4It is the structural schematic view of the variable-pitch pull rod of the hub structure of the electric variable-pitch propeller.
[0026] Figure 5 It is the structural schematic view three of the hub structure of the electric variable-pitch propeller.
[0027] Figure 6 It is the structural schematic view four of the hub structure of the electric variable-pitch propeller.
[0028] Figure 7 It is the structural schematic view five of the hub structure of the electric variable-pitch propeller.
[0029] Reference signs:
[0030] 1, upper hub; 2, lower hub; 3, variable-pitch mechanism; 301, variable-pitch motor; 302, central shaft; 303, moving piece; 3031, variable-pitch pull rod; 304, variable-pitch sliding block; 3041, matching groove; 305, motor support; 306, shaft coupling; 307, screw nut; 308, torsion arm assembly; 309, second guide rod; 4, first guide rod; 5, propeller mechanism; 501, propeller blade; 502, eccentric pin cover plate; 503, first combined bearing; 504, second combined bearing; 505, compression sleeve; 506, propeller root clamp sleeve; 507, locking nut; 6, sensor support; 7, angle sensor; 8, measuring gear; 9, first sliding sleeve; 10, positioning pin; 11, first positioning hole; 12, second positioning hole; 13, rotating bearing; 14, bearing outer ring pressing plate; 15, bearing inner ring pressing plate. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model. The following embodiments are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.
[0032] In the description of the embodiments of the utility model, it needs to be explained that, the orientation or position relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown in the drawings, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as a limitation on the embodiments of the utility model, which indicates or implies that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0033] In the description of the embodiments of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.
[0034] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0035] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.
[0036] Figure 1 is one of the structural schematic diagrams of the hub structure of the electric variable-pitch propeller provided by the utility model.Figure 2 It is the second structure schematic view of the hub structure for the electric variable pitch propeller provided by the utility model. Figure 3 It is the structure schematic view of the variable pitch sliding block of the hub structure for the electric variable pitch propeller provided by the utility model. Figure 4 It is the structure schematic view of the variable pitch pull rod of the hub structure for the electric variable pitch propeller provided by the utility model. Figure 5 It is the third structure schematic view of the hub structure for the electric variable pitch propeller provided by the utility model. Figure 6 It is the fourth structure schematic view of the hub structure for the electric variable pitch propeller provided by the utility model. Figure 7 It is the fifth structure schematic view of the hub structure for the electric variable pitch propeller provided by the utility model.
[0037] The utility model provides a kind of hub structure for electric variable pitch propeller, as shown in Figures 1 to 7 The hub structure for electric variable pitch propeller includes: upper hub 1, lower hub 2, variable pitch mechanism 3, first guide rod 4, blade mechanism 5 and power motor;
[0038] The power motor includes rotor and stator, the rotor is fixedly connected with the lower hub 2, and the lower hub 2 is fixedly connected with the upper hub 1 by fixing part between the lower hub 2 and the upper hub 1;
[0039] The upper end of the first guide rod 4 is inserted with the upper hub 1, and the lower end of the first guide rod 4 is inserted with the lower hub 2;
[0040] The variable pitch mechanism 3 includes variable pitch motor 301, center shaft 302, moving part 303 and variable pitch sliding block 304, the variable pitch motor 301 is arranged at the lower end of the lower hub 2 and is fixedly connected with the stator, the center shaft 302 is parallel to the first guide rod 4 and is fixedly arranged at the upper end of the variable pitch motor 301, the lower end of the moving part 303 is fixedly connected with the output end of the variable pitch motor 301, the upper end of the moving part 303 is fixedly connected with the variable pitch sliding block 304, the moving part 303 is slidably matched with the center shaft 302, and the variable pitch sliding block 304 is slidably matched with the first guide rod 4;
[0041] The blade mechanism 5 includes blade 501 and eccentric pin cover plate 502, the variable pitch sliding block 304 is rotatably connected with the blade 501, and the eccentric pin cover plate 502 is fixedly connected with the root of the blade 501 and is slidably matched with the variable pitch sliding block 304.
[0042] In the embodiment, the variable-pitch motor 301 is fixedly connected with the stator, the variable-pitch slider 304 moves up and down along the first guide rod 4 to drive the blade 501 to deflect, the problems in the prior art are solved, the variable-pitch motor 301 is relatively static during rotation, the variable-pitch slider 304 moves up and down between the upper hub 1 and the lower hub 2 to drive the blade 501 to deflect, thereby adjusting the pitch, ensuring the working efficiency of the variable-pitch mechanism 3, and the structure is simple, the adjusting precision is high, the response is fast, the quality is light, and energy is saved.
[0043] According to some embodiments of the utility model, in the flight process of the aircraft, the power motor drives the rotor to rotate, the upper hub 1 and the lower hub 2 drive the blade mechanism 5 to rotate with the rotor, when the pitch needs to be changed, the variable-pitch motor 301 drives the moving part 303 to move axially along the central shaft 302, and then drives the variable-pitch slider 304 to move up and down along the first guide rod 4, the variable-pitch slider 304 drives the blade 501 to deflect, and then adjusts the pitch.
[0044] According to some embodiments of the utility model, the bottom of the lower hub 2 is provided with a flange hole, the flange hole is connected with the power motor, and the power of the power motor is transmitted.
[0045] According to some embodiments of the utility model, the moving part 303 includes a slider, a sleeve and a variable-pitch pull rod 3031.
[0046] According to some embodiments of the utility model, three first guide rods 4 are evenly arranged between the upper hub 1 and the lower hub 2, and the variable-pitch slider 304 is evenly provided with three guide holes matched with the first guide rods 4.
[0047] According to the propeller hub structure for the electric variable-pitch propeller provided by the utility model, Figure 7 As shown in the figure, the variable-pitch motor 301 is arranged at the upper end of the upper hub 1 and is fixedly connected with the upper hub 1.
[0048] According to the propeller hub structure for the electric variable-pitch propeller provided by the utility model, Figure 7 As shown in the figure, the propeller hub structure for the electric variable-pitch propeller further includes a sensor support 6, an angle sensor 7 and a measuring gear 8, the sensor support 6 is fixedly connected with the upper hub 1, the angle sensor 7 is fixedly connected with the sensor support 6 and the measuring gear 8, and the measuring gear 8 is engaged with the eccentric pin cover plate 502.
[0049] In the embodiment, the variable-pitch motor 301 is fixedly connected with the upper hub 1, and the variable-pitch motor 301 rotates with the upper hub 1, a slip ring needs to be arranged for power supply to avoid breakage of the wire during rotation, the measuring gear 8 is engaged with the eccentric pin cover plate 502 to facilitate measurement of the deflection angle of the blade 501, the angle sensor 7 transmits the signal to the controller of the aircraft through the slip ring, and then the variable-pitch motor 301 is controlled.
[0050] According to the propeller hub structure for the electric variable-pitch propeller provided by the utility model, Figure 2 As shown in the figure, the propeller hub structure for the electric variable-pitch propeller further comprises an eccentric pin, a side edge of the variable-pitch sliding block 304 is provided with a matching groove 3041 for insertion of the eccentric pin, one end of the eccentric pin is inserted into the side edge of the variable-pitch sliding block 304, and the other end of the eccentric pin is fixedly connected with the eccentric pin cover plate 502.
[0051] In the embodiment, the eccentric pin is arranged to slide in the matching groove 3041, so that linear motion of the variable-pitch sliding block 304 is converted into rotation of the blade 501 along the axial direction of the blade 501.
[0052] According to some preferred embodiments of the utility model, the variable-pitch sliding block 304 is in the shape of a five-edged prism, and the matching grooves 3041 are correspondingly arranged at the edges.
[0053] According to some embodiments of the utility model, the propeller hub structure for the electric variable-pitch propeller further comprises a copper sleeve, and the copper sleeve is sleeved on the eccentric pin.
[0054] According to the propeller hub structure for the electric variable-pitch propeller provided by the utility model, Figure 1 and Figure 2 As shown in the figure, the propeller hub structure for the electric variable-pitch propeller further comprises a positioning pin 10, a first positioning hole 11 is arranged on the lower end surface of the upper hub 1, a second positioning hole 12 is arranged on the upper end surface of the lower hub 2, the lower end of the positioning pin 10 is arranged in the second positioning hole 12, and the upper end of the positioning pin 10 is arranged in the first positioning hole 11.
[0055] In the embodiment, the positioning pin 10 is arranged to position the upper hub 1 and the lower hub 2, and after positioning, the upper hub 1 and the lower hub 2 are fixed by bolts, and bolt holes are arranged on the upper hub 1 and the lower hub 2 to install the bolts.
[0056] According to some embodiments of the utility model, a steel sleeve is arranged in the bolt hole to prevent high wear of the bolt hole and the bolt and to enhance the stability of force transmission between the upper hub 1 and the lower hub 2.
[0057] According to the propeller hub structure for the electric variable-pitch propeller provided by the utility model, Figures 1 to 7As shown, the variable pitch mechanism 3 further comprises a motor support 305, a shaft coupling 306, a lead screw and a lead screw nut 307, the motor support 305 is fixedly arranged on the stator, the variable pitch motor 301 is fixedly connected with the motor support 305, the lead screw is arranged inside the motor support 305 and connected with the output end of the variable pitch motor 301 through the shaft coupling 306, and the lead screw nut 307 is threadedly matched with the lead screw and fixedly connected with the moving part 303.
[0058] In the embodiment, the rotary motion of the variable pitch motor 301 is converted into linear motion through the cooperation of the lead screw and the lead screw nut 307.
[0059] According to some embodiments of the utility model, the lead screw and the lead screw nut 307 have a self-locking function.
[0060] According to some embodiments of the utility model, the variable pitch pull rod 3031 is in sliding connection with the motor support 305 and is designed to have a profile or a guide groove for contact, so as to avoid rotation of the variable pitch pull rod during movement.
[0061] According to some embodiments of the utility model, the lead screw is used as the central shaft 302, the variable pitch motor 301 drives the lead screw to rotate through the shaft coupling 306, the lead screw nut 307 converts the rotation into linear motion, the lead screw nut 307 moves up and down along the lead screw, and further drives the moving part 303 and the variable pitch slider 304 to move up and down.
[0062] According to the propeller hub structure for the electric variable pitch propeller provided by the utility model, Figure 6 As shown, the variable pitch mechanism 3 further comprises a torsion arm assembly 308, the torsion arm assembly 308 comprises an upper torsion arm and a lower torsion arm, the upper torsion arm is fixedly connected with the moving part 303, the lower torsion arm is fixedly connected with the motor support 305, and the upper torsion arm and the lower torsion arm are hinged.
[0063] In the embodiment, the upper torsion arm and the lower torsion arm are hinged, so as to ensure that the moving part 303 does not rotate with the lead screw and ensure the relative movement between the lead screw and the moving part 303 along the direction of the central shaft 302.
[0064] According to the propeller hub structure for the electric variable pitch propeller provided by the utility model, Figure 2 As shown, the variable pitch mechanism 3 further comprises a second guide rod 309, the lower end of the second guide rod 309 is fixedly connected with the motor support 305, and the upper end of the second guide rod 309 is in sliding cooperation with the moving part 303.
[0065] In the embodiment, the second guide rod 309 is arranged to prevent the moving part 303 from rotating with the lead screw.
[0066] According to some embodiments of the present invention, a sliding sleeve is provided between the moving part 303 and the second guide rod 309. Preferably, the sliding sleeve is made of copper.
[0067] According to the present invention, a hub structure for an electric variable pitch propeller is provided, wherein a first sliding sleeve 9 is provided between the variable pitch slider 304 and the first guide rod 4.
[0068] In this embodiment, by setting the first sliding sleeve 9, the variable pitch slider 304 is protected to avoid collisions and improve its service life.
[0069] According to some preferred embodiments of the present invention, the first sliding sleeve 9 is made of copper.
[0070] According to the present invention, a hub structure for an electric variable pitch propeller is provided, wherein a rotary bearing is provided between the moving part 303 and the variable pitch slider 304.
[0071] According to some embodiments of the present invention, the rotary bearing includes one of a double-row angular contact bearing, a spherical roller bearing, and an angular contact bearing.
[0072] According to some embodiments of the present invention, a rotary bearing 13 is provided between the moving part 303 and the variable pitch slider 304. The outer ring of the rotary bearing 13 is engaged with the variable pitch slider 304 through a shaft hole, and the inner ring of the rotary bearing 13 is engaged with the moving part 303 through a hole shaft. The outer ring of the rotary bearing 13 abuts against the bearing outer ring pressure plate 14 and the boss in the hole of the variable pitch slider 304, and the inner ring of the rotary bearing 13 abuts against the bearing inner ring pressure plate 15 and the shoulder of the moving part 303.
[0073] According to the present invention, a hub structure for an electric variable-pitch propeller is provided, such as... Figure 3 As shown, multiple support arm holes are evenly distributed on the outer side wall of the upper rotor hub. The rotor blade 501 is rotatably engaged with the support arm holes. The rotor blade mechanism 5 also includes a first combined bearing 503, a second combined bearing 504, a clamping sleeve 505, and a rotor root clamping sleeve 506. The support arm holes are fitted onto the root of the rotor blade 501. The clamping sleeve 505, the second combined bearing 504, the rotor root clamping sleeve 506, and the first combined bearing 503 are arranged sequentially from the inside to the outside in the gap between the support arm holes and the root of the rotor blade 501, and are all fitted onto the root of the rotor blade 501. The inner ring of the first combined bearing 503 abuts against the shoulder of the root of the rotor blade 501, and the outer ring of the first combined bearing 503 abuts against the boss inside the support arm hole.
[0074] In the embodiment, the load bearing capacity of the propeller is improved by matching the first combined bearing 503 and the second combined bearing 504, and the stability of the propeller is improved, the root structure of the blade 501 is compact, and the weight can be effectively reduced.
[0075] According to some embodiments of the utility model, the both ends of the arm hole and the blade 501 are designed with sealing rings to prevent external medium from entering and affecting the rotation of the first combined bearing 503 and the second combined bearing 504, and to prevent the leakage of lubricating grease, reduce the frequency of lubricating grease supplement, and save energy.
[0076] According to some embodiments of the utility model, the first combined bearing 503 comprises an angular contact bearing, and the second combined bearing 504 comprises a needle thrust combined bearing.
[0077] According to some embodiments of the utility model, the needle thrust combined bearing and the angular contact bearing are matched to bear the axial load, the radial load and the bending moment.
[0078] According to some embodiments of the utility model, as shown in Figure 5 As shown in the figure, the blade mechanism 5 further comprises a locking nut 507, the locking nut 507 is used for applying a pre-tightening force for axial positioning, the force transmission path is in sequence of the pressing sleeve 505, the second combined bearing 504, the blade root clamp sleeve 506 and the first combined bearing 503, the bearing gap can be eliminated, the vibration can be reduced, and the stability of the propeller operation can be enhanced.
[0079] The technical scheme of the utility model will be further explained in combination with a specific embodiment, and it should be noted that the specific embodiment is only for the purpose of facilitating the technical personnel in the art to better understand the technical scheme of the utility model, and should not be regarded as an unreasonable limitation on the protection scope of the utility model.
[0080] Embodiment one
[0081] The controller outputs an instruction, the variable pitch motor rotates synchronously with the upper hub, the variable pitch motor drives the lead screw to rotate through the shaft coupling, the lead screw nut moves up and down along the lead screw, and then drives the variable pitch block to move up and down, in the movement process, the eccentric pin slides in the matching groove, so as to adjust the angle of the blade, and then control the pitch, in the adjustment process, the measuring gear deflects with the eccentric pin cover plate, the angle sensor detects the deflection angle of the measuring gear, and transmits the signal to the controller through the slip ring, so as to realize the closed-loop control of the pitch.
[0082] Embodiment two
[0083] The controller outputs an instruction, the variable-pitch motor is relatively static with the fuselage, the variable-pitch motor drives the lead screw to rotate through the shaft coupling, the lead screw nut moves up and down along the lead screw and in turn drives the moving part to move up and down, the moving part is axially positioned through the anti-twist arm assembly or the second guide rod, the variable-pitch slider moves up and down along the first guide rod with the moving part, in the movement process, the eccentric pin slides in the matching groove, thereby adjusting the angle of the blade and in turn controlling the pitch.
[0084] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A hub structure for an electric variable-pitch propeller, characterized by, The utility model relates to a variable pitch mechanism of wind turbine, including: Upper hub, lower hub, variable pitch mechanism, first guide rod, paddle mechanism and power motor; The power motor includes rotor and stator, the rotor is fixedly connected with the lower hub, and the lower hub is fixedly connected with the upper hub through the fixing piece; The upper end of the first guide rod is inserted with the upper hub, and the lower end of the first guide rod is inserted with the lower hub; The variable pitch mechanism includes variable pitch motor, central shaft, moving part and variable pitch slider, the variable pitch motor is arranged at the lower end of the lower hub and is fixedly connected with the stator, the central shaft is parallel to the first guide rod and is fixedly arranged at the upper end of the variable pitch motor, the lower end of the moving part is fixedly connected with the output end of the variable pitch motor, the upper end of the moving part is fixedly connected with the variable pitch slider, the moving part is slidingly matched with the central shaft, and the variable pitch slider is slidingly matched with the first guide rod; The paddle mechanism includes paddle and eccentric pin cover plate, the variable pitch slider is rotatably connected with the paddle, and the eccentric pin cover plate is fixedly connected with the root of the paddle and slidingly matched with the variable pitch slider.
2. The hub structure for an electrically variable pitch propeller according to claim 1, characterized in that, The variable pitch motor is arranged at the upper end of the upper hub and is fixedly connected with the upper hub.
3. The hub structure for an electrically variable pitch propeller according to claim 2, wherein Further comprising sensor support, angle sensor and measuring gear, the sensor support is fixedly connected with the upper hub, the angle sensor is fixedly connected with the sensor support and the measuring gear, and the measuring gear is engaged with the eccentric pin cover plate.
4. The hub structure for an electrically variable pitch propeller according to claim 1, characterized by Further comprising eccentric pin, the side of the variable pitch slider is provided with a matching groove for inserting the eccentric pin, one end of the eccentric pin is inserted with the side of the variable pitch slider, and the other end of the eccentric pin is fixedly connected with the eccentric pin cover plate.
5. The hub structure for an electrically variable pitch propeller according to claim 1, wherein Further comprising positioning pin, the lower end surface of the upper hub is provided with a first positioning hole, the upper end surface of the lower hub is provided with a second positioning hole, the lower end of the positioning pin is arranged in the second positioning hole, and the upper end of the positioning pin is arranged in the first positioning hole.
6. The hub structure for an electrically variable pitch propeller according to claim 1, wherein The variable pitch mechanism further comprises a motor support, a shaft coupling, a lead screw, and a lead screw nut. The motor support is fixedly arranged on the stator. The variable pitch motor is fixedly connected with the motor support. The lead screw is arranged inside the motor support and connected with the output end of the variable pitch motor through the shaft coupling. The lead screw nut is threadedly connected with the lead screw and fixedly connected with the moving part.
7. The hub structure for an electrically variable pitch propeller according to claim 6, wherein The variable pitch mechanism further comprises a torsion arm assembly, which comprises an upper torsion arm and a lower torsion arm. The upper torsion arm is fixedly connected with the moving part, and the lower torsion arm is fixedly connected with the motor support. The upper torsion arm and the lower torsion arm are hinged.
8. The hub structure for an electrically variable pitch propeller according to claim 6, wherein The variable pitch mechanism further comprises a second guide rod, the lower end of the second guide rod is fixedly connected with the motor support, and the upper end of the second guide rod is slidingly matched with the moving part.
9. The hub structure for an electrically variable pitch propeller according to claim 1, wherein A rotary bearing is arranged between the moving part and the variable pitch slider.
10. The hub structure for an electrically variable pitch propeller according to claim 1, wherein The outer side wall of the upper hub is uniformly provided with a plurality of arm holes, the paddle is rotationally matched with the arm hole, the paddle mechanism further comprises a first combined bearing, a second combined bearing, a compression sleeve and a paddle root clamp sleeve, the arm hole is sleeved on the root of the paddle, the gap between the arm hole and the root of the paddle is sequentially provided from inside to outside with the compression sleeve, the second combined bearing, the paddle root clamp sleeve and the first combined bearing, and all are sleeved on the root of the paddle, the inner ring of the first combined bearing is in abutment with the shaft shoulder of the root of the paddle, and the outer ring of the first combined bearing is in abutment with the boss inside the arm hole.