CN218022159U - Electric-drive variable-pitch propeller device with large torque output - Google Patents
Electric-drive variable-pitch propeller device with large torque output Download PDFInfo
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- CN218022159U CN218022159U CN202221987446.4U CN202221987446U CN218022159U CN 218022159 U CN218022159 U CN 218022159U CN 202221987446 U CN202221987446 U CN 202221987446U CN 218022159 U CN218022159 U CN 218022159U
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- propeller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model discloses an electric driving variable pitch propeller device with large torque output, which comprises a blade, a variable pitch component, a flange cover plate, a transmission shaft and a propeller hub; the variable pitch assembly comprises a motor assembly, a planetary gear pair, n worm-and-gear pairs and a propeller root metal assembly, wherein the planetary gear pair comprises a sun gear and n planet gears, and the sun gear is fixedly connected with the planet gears; the planet wheels correspond to the worm gear pairs one by one. The blades are assembled and disassembled from the outside of the side cavity of the propeller hub and matched with the pitch-variable assembly, the sun gear of the planetary gear set is driven to rotate through the motor, the planetary gear and the worm are driven to rotate together, and the pitch is changed by rotating the blades in a worm and gear transmission mode. The device is convenient to disassemble and assemble, can realize tail end self-locking, has high control precision, and can provide large variable pitch moment.
Description
Technical Field
The utility model belongs to the aeronautical equipment field, concretely relates to electric drive displacement screw device of big moment output.
Background
At present, hydraulic drive is adopted in the driving modes of the existing variable-pitch propeller devices with large torque output at home and abroad, and the motor drive limits the application range of the variable-pitch propeller devices due to small driving force caused by space limitation and selection of a transmission mode. With the continuous expansion of the general aviation market, the use frequency of the propeller is higher and higher, higher requirements are provided for maintenance, weight and size and replacement of consumable parts, the maintenance is convenient, the occupation ratio of the weight and the size on the aircraft is small as much as possible, the consumable parts can be replaced easily, and the hydraulic drive is still too complex in maintenance compared with a motor drive mode.
SUMMERY OF THE UTILITY MODEL
The technical solution problem of the utility model is that: the electric driving variable pitch propeller device overcomes the defects of the prior art, has large torque output, is convenient to maintain, has small weight and size on an aircraft, and can easily replace consumable parts.
The technical solution of the utility model is that:
an electric-drive variable-pitch propeller device with large torque output comprises blades, a variable-pitch assembly, a flange cover plate, a transmission shaft and a propeller hub;
the variable-pitch assembly comprises a motor assembly, a planetary gear pair, n worm and gear pairs and a propeller root metal assembly, wherein the planetary gear pair comprises a sun gear and n planet gears, and the sun gear is in transmission connection with the planet gears; the planet wheels correspond to the worm gear pairs one by one; each worm gear and worm pair comprises a worm gear and a worm, and the worm is in transmission connection with the worm gear; the paddle root metal component comprises a paddle root metal piece, a third supporting bearing, a fourth supporting bearing and a thrust bearing;
the propeller hub is of a hollow structure, and the flange cover plate, the transmission shaft, the planetary gear pair and the worm-and-gear pair are all positioned in a hollow cavity of the propeller hub;
a motor output shaft of the motor assembly is fixedly connected with a transmission shaft, and the transmission shaft is supported on the flange cover plate through a first supporting bearing; the sun wheel is sleeved on the transmission shaft; each planet wheel is sleeved on the worm of the corresponding worm-gear worm pair, the rotation axes of the planet wheel and the worm of the corresponding worm-gear worm pair are collinear, and the worm is supported on the inner wall of the propeller hub through a second support bearing; the propeller root metal piece is fixedly connected with the worm wheel and is supported in the side cavity of the propeller hub through a third supporting bearing, a fourth supporting bearing and a thrust bearing, and the blades are fixedly connected with the propeller root metal piece.
Preferably, the metal propeller root assembly further comprises a conical ring and a fixing ring;
the cone ring is of a split structure, the cone ring is sleeved on the paddle, the integral structure formed by the cone ring and the paddle is inserted into the paddle root metal piece, and the fixing ring is sleeved on the outer sides of the paddle root metal piece and the paddle to further fix the paddle root metal piece and the paddle.
Preferably, two L-shaped grooves are machined in the end part of one side, close to the flange cover plate, of the paddle root metal piece, and a limiting block with a slope is placed in each groove; the stop lever is in threaded connection with the flange cover plate, the length of the stop lever extending downwards is adjusted by screwing the length, and the nut is connected to the top end of the stop lever and used for locking, vibration-proof and fixing the adjusted position of the stop lever.
Preferably, the two L-shaped grooves processed at the end part of one side, close to the flange cover plate, of the paddle root metal piece are arranged in an arc shape along the rotation axis of the paddle root metal piece, the slope surfaces of the two limiting blocks are placed in opposite directions, the stop lever and the two limiting blocks are used for limiting the rotation angle of the paddle root metal piece, and the rotation angle range of the paddle root metal piece is larger than the real pitch angle motion range.
Preferably, the propeller root metal piece is connected with the propeller hub from inside to outside from the side cavity of the propeller hub, a first protrusion is designed on the outer wall of the propeller root metal piece, a second protrusion is designed in the side cavity of the propeller hub, the first protrusion is located on the inner side of the second protrusion, the thrust bearing is installed between the first protrusion and the second protrusion, and the first protrusion transmits force to the second protrusion of the propeller hub through the thrust bearing under the action of centrifugal force.
Preferably, the motor assembly comprises a motor, a speed reducer, an encoder and a flange sheath, an output shaft of the motor is fixedly connected with the transmission shaft, the motor, the speed reducer and the encoder are installed on the motor, the motor is fixed on the flange sheath, and the flange sheath is fixed on the flange cover plate.
Preferably, the variable pitch assembly further comprises a motor shield, the motor shield is covered on a flange shield of the motor assembly, and the bottom of the motor shield is fixedly connected with the propeller hub.
Preferably, the size of the motor shield is matched with that of the motor, so that the protection of the motor and the sealing of the hub are realized.
Preferably, the central axis of the flange cover plate is perpendicular to the rotation axis of the paddle and is collinear with the rotation axis of the sun gear of the planetary gear pair, and bearing holes for positioning the planetary gear and the worm are uniformly distributed on the flange cover plate.
Preferably, the locking ring is in threaded fit with the propeller root metal piece and is sleeved on the propeller root metal piece; the locking ring is in sealing fit with the side cavity of the propeller hub through a sealing ring.
Preferably, the blade pitch angle measuring device further comprises a potentiometer, a rotor of the potentiometer is fixedly connected with the upper end of the worm, a stator of the potentiometer is fixedly connected with the flange cover plate, and the potentiometer obtains the pitch angle change angle of the blade by measuring the rotation angle of the worm.
Compared with the prior art, the utility model has the advantages that:
in order to meet the requirement of large propeller pitch force of the propeller, the utility model designs a pitch-variable mechanism of an electrically-driven planetary gear pair and a worm gear pair, and provides an electrically-driven pitch-variable propeller device with large torque output; in order to ensure the accurate change of the pitch angle of the blade, the fixed reduction ratio and the combined closed-loop control of a motor component with an encoder and a tail end encoder are adopted; in order to prevent the blade pitch angle from fluctuating under pneumatic stress, a worm gear and worm pair structure is adopted to lock the blade angle; in order to facilitate the maintenance of the propeller, the variable pitch component of the propeller is designed in a modularized way, so that the blades and the motor which are easy to damage can be replaced at any time without disassembling the variable pitch component, and the consumable parts can be replaced easily; in order to optimize the stress of the propeller root metal piece of the propeller, the design and the installation mode of the propeller root metal piece from inside to outside are adopted, and the centrifugal force bearing requirement of the propeller blade is met; the limiting block and the range-adjustable gear lever are arranged on the blade root metal piece, mechanical limitation is set on blade pitch angle change, the range is adjustable, and the requirements for adjusting the pitch angle range of the blades under different working conditions are met.
The utility model discloses an electrically driven mode can save equipment such as pneumatic cylinder and speed regulator and hydraulic oil and pipe-line system etc. has simplified the structure of mechanism greatly and has constituteed, and weight also very reduces simultaneously to the load of aircraft has been alleviateed.
Drawings
FIG. 1 is a perspective cross-sectional view of an electrically driven pitch propeller arrangement with high torque output;
FIG. 2 is a structural assembly diagram of the motor assembly, the planetary gear pair and the worm-and-gear pair;
FIG. 3 is a block diagram of the transmission and limiting structure of the electrically driven pitch-variable propeller device;
fig. 4 is a composition diagram of a mechanical limiting structure at the root metal piece.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In order to meet the requirement of large propeller pitch force of the propeller, the utility model designs a pitch-variable mechanism of an electrically-driven planetary gear pair and a worm gear pair, and provides an electrically-driven pitch-variable propeller device with large torque output; in order to ensure the accurate change of the pitch angle of the blade, a fixed reduction ratio and a motor assembly with an encoder are adopted; in order to prevent the blade pitch angle from fluctuating under pneumatic stress, a worm gear and worm pair structure is adopted to lock the blade angle; in order to facilitate the maintenance of the propeller, the variable pitch component of the propeller is designed in a modularized way, and blades and motors which are easy to damage can be replaced at any time without disassembling the variable pitch component; in order to optimize the stress of the propeller root metal piece, the design and the installation mode of the propeller root metal piece from inside to outside are adopted, and the centrifugal force bearing requirement of the propeller blade is met. The limiting blocks are arranged on the paddle root metal pieces, mechanical limitation is arranged on the change of the paddle pitch angle, and the motion safety of the paddle is guaranteed.
Referring to fig. 1, 2 and 3, the electric-driving variable-pitch propeller device with large torque output comprises a blade 1, a variable-pitch assembly, a hub 5 and a motor shield 3, wherein the variable-pitch assembly comprises a motor assembly 2, a planetary gear pair, 3 worm and gear pairs and a blade root metal assembly, and the motor assembly 2 comprises a motor, a speed reducer and an encoder which are fixed on a flange sheath 4. The propeller root metal assembly comprises a propeller root metal piece 7, a fixing ring 8, a conical ring 9, a support bearing 6, a support bearing 12, a thrust bearing 11 and the like. The output shaft of the motor is fixedly connected with a transmission shaft 19, the transmission shaft 19 is supported on a flange cover plate 17 through a bearing 18, the flange cover plate 17 is fixedly connected with the propeller hub 5, one end of the transmission shaft 19 is fixedly connected with a sun gear 16 of the planetary gear pair, and the output shaft of the motor rotates to drive the sun gear 16 and the planetary gear 15 of the planetary gear pair to rotate. The planet wheel is in one-to-one correspondence with the worm gear pair, the planet wheel 15 is fixedly connected with a worm 14 of the corresponding worm gear pair, the rotation axes of the planet wheel and the worm 14 are collinear and are supported on the propeller hub 5 through a bearing 20, the worm 14 rotates to drive the worm wheel 13 to rotate, the propeller root metal piece 7 is fixedly connected with the worm wheel 13, the propeller root metal piece 7 is installed from inside to outside through a side cavity of the propeller hub when installed, and is supported with the wall surface of the side cavity of the propeller hub 5 through a supporting bearing 6, a supporting bearing 12 and a thrust bearing 11 and can rotate, the blade 1 is matched with the conical ring 9 and is fixedly connected with the propeller root metal piece 7 through the fixing ring 8, and variable-pitch motion is realized along with the rotation of the propeller root metal piece 7. Specifically, the cone ring 9 is of a split structure, the cone ring 9 is sleeved on the paddle 1, the integral structure formed by the cone ring 9 and the paddle 1 is inserted into the paddle root metal piece 7, and the fixing ring 8 is sleeved on the outer sides of the paddle root metal piece 7 and the paddle 1 to further fix the paddle root metal piece 7 and the paddle 1.
In order to limit and monitor the change of the pitch angle of the blade 1, two L-shaped grooves are arranged at the end part of the inner side of the blade root metal piece 7 and used for placing a limiting block 21 with a slope, a stop lever 22 is in threaded connection with a flange cover plate 17, the stop lever 22 is in threaded connection with the flange cover plate 17, the length of the downward projection of the stop lever 22 is adjusted through screwing length, a nut 23 is connected to the top end of the stop lever 11, and the position of the stop lever 22 which is adjusted is locked, anti-vibration and fixed.
Two L-shaped grooves processed at the end part of one side, close to the flange cover plate 17, of the paddle root metal piece 7 are arranged in an arc shape along the rotation axis of the paddle root metal piece 7, the slope surfaces of the two limiting blocks 21 are arranged in opposite directions, and the stop lever 22 and the two limiting blocks are used for limiting the rotation angle of the paddle root metal piece 7, so that the rotation angle range of the paddle root metal piece 7 is larger than the motion range of a real pitch angle.
As shown in fig. 4, when the paddle root metal member 7 rotates, the bottom end of the shift lever 22 interferes with the a surface and the B surface of the limit block 21, so as to limit the rotation angle range of the paddle root metal member 7, and the rotation angle range of the paddle root metal member 7 is greater than the true pitch angle movement range.
For example, the movement range of the real pitch angle of the blade is 8-30 degrees, and the movement range of the gear lever without interference is 6-32 degrees, so that the real movement range is ensured not to exceed too much.
The rotor of the potentiometer 24 is fixedly connected with the upper end of the worm 14, the stator of the potentiometer 24 is fixedly connected with the flange cover plate 17, and the pitch angle change angle of the blade 1 is indirectly obtained by measuring the rotation angle of the worm.
The size of the motor shield 3 is matched with the diameter and the length of the motor and is fixedly connected with the propeller hub 5, so that the protection of the motor and the sealing of the propeller hub 5 are realized.
The cooperation of root metalwork 7 arch and thrust bearing 11, the centrifugal force with the paddle transmits to hub 5 under the effect of rotatory centrifugal force on, its mounting means is that root metalwork 7 is connected with the hub from inside to outside from hub side cavity, the design has first arch on the root metalwork 7 outer wall, hub side cavity design has the second arch, first arch is located the second arch inboard (see from the figure that first arch is located the second arch right side), thrust bearing 11 installs between first arch and the second arch, first arch passes through thrust bearing and transmits power to the hub second arch under the effect of centrifugal force. The worm-gear pair comprises a worm wheel 13 and a worm 14, has a self-locking function, and can realize the pitch angle limit change range of the blade 1 by limiting the movement range of the worm wheel 13.
The central axis of the flange cover plate 17 is perpendicular to the rotation axis of the blade 1 and is collinear with the rotation axis of the sun gear 16 of the planetary gear pair, and three bearing holes for positioning the planet gear 15 and the worm 14 are uniformly distributed at a certain radius from the central axis. The locking ring 10 is in threaded fit with the propeller root metal piece 7, axially positions the propeller root metal piece 7, and is in sealing fit with the side cavity wall surface of the propeller hub 5 through a sealing ring. When the worm wheel 13 is installed, the installation can be carried out from the outside to the inside in the inner cavity of the paddle root metal piece 7, and the inner end face of the paddle root metal piece 7 is preferably of a hollow structure.
The wire guide rods 25 are uniformly distributed in the circumferential direction along the rotation axis of the propeller, the number of the wire guide rods is consistent with that of the worm gear pair, and cables of the motor assembly 2 and the potentiometer 24 are connected with an onboard power supply through the hollow wire guide rods 25, so that the cables are prevented from being exposed outside the propeller.
The transmission and movement path of the device is motor-planetary gear pair-worm and gear pair-blade, the reduction ratio is fixed, and closed-loop control of the angle change of the pitch angle of the blade 1 can be realized through an encoder of the motor component 2 and the potentiometer 24.
The utility model discloses an electric drive displacement screw device of big moment output, mainly be for solving the electric drive screw and can't provide big variable pitch moment and design in order to match big thrust engine demand, its main part includes the paddle, displacement subassembly and propeller hub etc, the paddle is followed the outer dismouting of propeller hub side chamber and is cooperated with the displacement subassembly, it is rotatory through big torque motor drive planetary gear set's sun gear, it is together rotatory to drive planet wheel and worm, and the rotation that adopts worm gear's transmission mode to realize the paddle carries out the displacement. The utility model discloses the paddle is installed from hub side chamber outside to the inside, and root of oar metalwork and displacement mechanism then follow hub side chamber from the inside to the outside installation, and the integrative design of hub and displacement mechanism, paddle are the independent design to direct butt joint installation, modularization and installation easy maintenance. The device is convenient to disassemble and assemble, can realize tail end self-locking, has high control precision, and can provide large variable pitch moment.
Any feature disclosed in this specification may be replaced by alternative features serving an equivalent or similar purpose, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The present invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
The details of the present invention not described in detail in the specification are well known to those skilled in the art.
Claims (11)
1. The utility model provides an electric drive displacement propeller device of big moment output which characterized in that: comprises a blade (1), a variable pitch component, a flange cover plate (17), a transmission shaft (19) and a hub (5);
the variable-pitch assembly comprises a motor assembly (2), a planetary gear pair, n worm-gear pairs and a propeller root metal assembly, wherein the planetary gear pair comprises a sun gear (16) and n planet gears (15), and the sun gear (16) is in transmission connection with the planet gears (15); the planet wheels correspond to the worm gear pairs one by one; each worm wheel and worm pair comprises a worm wheel (13) and a worm (14), and the worm (14) is in transmission connection with the worm wheel (13); the paddle root metal assembly comprises a paddle root metal piece (7), a third supporting bearing (6), a fourth supporting bearing (12) and a thrust bearing (11);
the propeller hub (5) is of a hollow structure, and the flange cover plate (17), the transmission shaft (19), the planetary gear pair and the worm-and-gear pair are all positioned in a hollow cavity of the propeller hub (5);
a motor output shaft of the motor assembly (2) is fixedly connected with a transmission shaft (19), and the transmission shaft (19) is supported on the flange cover plate (17) through a first support bearing (18); the sun wheel (16) is sleeved on the transmission shaft (19); each planet wheel (15) is sleeved on the worm (14) of the corresponding worm-gear pair, the rotation axes of the planet wheel (15) and the worm (14) of the corresponding worm-gear pair are collinear, and the worm (14) is supported on the inner wall of the propeller hub (5) through a second supporting bearing (20); the propeller root metal piece (7) is fixedly connected with the worm wheel (13) and is supported in the side cavity of the propeller hub (5) through a third supporting bearing (6), a fourth supporting bearing (12) and a thrust bearing (11), and the blade (1) is fixedly connected with the propeller root metal piece (7).
2. A high torque output electrically driven pitch propeller device as claimed in claim 1, wherein: the paddle root metal component also comprises a conical ring (9) and a fixing ring (8);
conical ring (9) are the split structure, and conical ring (9) cover is on paddle (1), and the overall structure that conical ring (9) and paddle (1) are constituteed is inserted in oar root metalwork (7), and solid fixed ring (8) cover is in oar root metalwork (7) and paddle (1) outside to further fixed oar root metalwork (7) and paddle (1).
3. A high torque output electrically driven pitch propeller device as claimed in claim 2, wherein: two L-shaped grooves are machined in the end part, close to the flange cover plate (17), of the paddle root metal piece (7), and a limiting block (21) with a slope is placed in each groove; the gear rod (22) is in threaded connection with the flange cover plate (17), the length of the gear rod (22) extending downwards is adjusted through screwing the length, the nut (23) is connected to the top end of the gear rod (22), and the adjusted position of the gear rod (22) is locked, anti-vibration and fixed.
4. A high torque output electrically driven pitch propeller device as claimed in claim 3, wherein: two L-shaped grooves machined in the end portion, close to the flange cover plate (17), of the paddle root metal piece (7) are arranged in an arc shape along the rotation axis of the paddle root metal piece (7), the slope surfaces of the two limiting blocks (21) are placed in opposite directions, and the stop lever (22) and the two limiting blocks are used for limiting the rotation angle of the paddle root metal piece (7) so as to ensure that the rotation angle range of the paddle root metal piece (7) is larger than the true pitch angle movement range.
5. A high torque output electrically driven pitch propeller device as claimed in claim 1, wherein: the propeller root metal piece (7) is connected with the propeller hub from inside to outside from the side cavity of the propeller hub, a first protrusion is designed on the outer wall of the propeller root metal piece (7), a second protrusion is designed in the side cavity of the propeller hub, the first protrusion is located on the inner side of the second protrusion, the thrust bearing (11) is installed between the first protrusion and the second protrusion, and the first protrusion transmits force to the second protrusion of the propeller hub through the thrust bearing under the action of centrifugal force.
6. A high torque output electrically driven pitch propeller device as claimed in claim 1, wherein: the motor assembly (2) comprises a motor, a speed reducer, an encoder and a flange sheath (4), an output shaft of the motor is fixedly connected with a transmission shaft (19), the motor, the speed reducer and the encoder are installed on the motor, the motor is fixed on the flange sheath (4), and the flange sheath (4) is fixed on a flange cover plate (17).
7. A high torque output electrically driven pitch propeller device as claimed in claim 6, wherein: the variable-pitch assembly further comprises a motor shield (3), the motor shield (3) is covered on a flange sheath (4) of the motor assembly (2), and the bottom of the motor shield (3) is fixedly connected with the propeller hub (5).
8. A high torque output electrically driven variable pitch propeller device as claimed in claim 7, wherein: the size of the motor shield (3) is matched with that of the motor, so that the protection of the motor and the sealing of the propeller hub (5) are realized.
9. A high torque output electrically driven pitch propeller device as claimed in claim 1, wherein: the central axis of the flange cover plate (17) is vertical to the rotation axis of the blade (1) and is collinear with the rotation axis of the sun gear (16) of the planetary gear pair, and bearing holes for positioning the planetary gear (15) and the worm (14) are uniformly distributed in the flange cover plate (17).
10. A high torque output electrically driven pitch propeller device as claimed in claim 1, wherein: the locking ring (10) is in threaded fit with the propeller root metal piece (7) and is sleeved on the propeller root metal piece (7); the locking ring (10) is in sealing fit with the side cavity of the propeller hub (5) through a sealing ring.
11. A high torque output electrically driven pitch propeller device as claimed in claim 1, wherein: the blade pitch angle measuring device is characterized by further comprising a potentiometer (24), a rotor of the potentiometer (24) is fixedly connected with the upper end of the worm (14), a stator of the potentiometer (24) is fixedly connected with the flange cover plate (17), and the potentiometer (24) obtains a pitch angle change angle of the blade (1) by measuring a rotation angle of the worm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221987446.4U CN218022159U (en) | 2022-07-29 | 2022-07-29 | Electric-drive variable-pitch propeller device with large torque output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221987446.4U CN218022159U (en) | 2022-07-29 | 2022-07-29 | Electric-drive variable-pitch propeller device with large torque output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218022159U true CN218022159U (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221987446.4U Active CN218022159U (en) | 2022-07-29 | 2022-07-29 | Electric-drive variable-pitch propeller device with large torque output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218022159U (en) |
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2022
- 2022-07-29 CN CN202221987446.4U patent/CN218022159U/en active Active
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