CN213292694U

CN213292694U - Propeller device for turboprop engine

Info

Publication number: CN213292694U
Application number: CN202022042745.8U
Authority: CN
Inventors: 邱国才; 韩广雷; 鲁玉泉; 王石柱
Original assignee: Shanghai Shangshi Energy Technology Co ltd
Current assignee: Shanghai Shangshi Aeroengine Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-05-28
Anticipated expiration: 2030-09-17

Abstract

The utility model relates to a screw device for turboprop engine. The screw includes the shell, paddle and change oar mechanism, each paddle rotates the assembly on the shell, the paddle includes the carousel, blade and eccentric driving lever, blade and carousel are coaxial, constitute the polygon installation cavity between each carousel in the shell, it includes the motor to change oar mechanism, the reduction gear, shaft coupling and lead screw, it still includes the dial dish to change oar mechanism, the dial dish passes through screw nut and installs on the lead screw, the lead screw rotates the assembly on the shell, the dial dish is through the chamber wall circumference of the face of splining and polygon installation cavity of splining and the cooperation of splining, axial sliding fit, the dial dish is along lead screw axial displacement along the rotation of lead screw, the dial dish is provided with the U-shaped groove with each eccentric driving lever one-to-one, each eccentric driving lever cartridge is in corresponding U-shaped inslot, it promotes eccentric shifting pin through the U-shaped groove and. The blade angle control device has the advantages of being capable of quickly responding to change of the blade angle, safe, stable and small in size.

Description

Propeller device for turboprop engine

Technical Field

The utility model relates to a screw device for turboprop engine.

Background

A Turbine engine (Turbine engine, or Turbine for short) is a form of engine that uses rotating parts to extract kinetic energy from a fluid passing through it, one type of internal combustion engine. Are commonly used as engines for aircraft and large ships or vehicles.

The fuel oil is divided into three structures according to the difference of fuel oil economy and actual use: turbojet engines, turbofan engines, and turboprop engines.

Turbojet engines, called turbojet engines for short, are designed to eject the combusted gases directly, providing kinetic energy against the thrust of the ejected gas stream. Its advantages are high speed and low fuel consumption. The turbojet engine is mainly applied to general fighters, bombers, unmanned planes and the like.

In order to improve the heat transfer efficiency, the turbofan engine does not directly discharge gas, but pushes the fan to rotate through the inner duct, and the gas generated by the rotation of the fan pushes the airplane to fly. Its advantages are saving oil and high speed. The turbofan engine is mainly applied to civil aircrafts such as Boeing 747, 737 and civil aircrafts such as airbus A380.

In order to improve the thermal efficiency of a turboprop engine, a turboprop engine is called as a turboprop engine for short, an engineer needs to increase the diameter of a fan, the diameter of the fan is not large enough to be placed in an airplane engine, and the fan cannot be placed outside, so that the turboprop engine is formed. The turboprop engine is also said to be a large bypass ratio turbofan engine. Only when the rotating speed of the engine is too high, a gear box is needed to decelerate, so that the rotating speed of the large fan is reduced, and the wind power of the fan drives the airplane to fly. Its advantages are saving oil, simple maintenance and slower flying speed. Turboprop engines are used primarily in military transport aircraft, such as: c-130 energetically transporting machine, an-22 transporting machine, etc.

In order to maintain the balance between the required torque of the propeller and the output torque of the engine in the working process of the turboprop engine, a rotating speed deviation signal needs to be monitored by a rotating speed measuring mechanism and is output to a propeller pitch changing mechanism to continuously change the angle of a blade, so that the working rotating speed of the engine is constant. The blade angle of the traditional turboprop engine is adjusted by adopting a hydraulic mechanism, and the following problems exist:

(1) the acceleration and deceleration performance of the propeller-driven aircraft is seriously influenced because the blade angle cannot be rapidly changed due to insufficient actuation performance and large load inertia, and the required torque of the propeller cannot be maintained in a matched manner;

(2) because high-pressure hydraulic oil is supplied to the propeller which runs at high speed for a long time, the sealing ring for sealing is easy to lose efficacy and leak oil, so that the risk that the propeller cannot realize pitch change is caused;

(3) the high-speed dynamic seal cannot provide high hydraulic pressure, and the hydraulic pitch-changing mechanism is very large in size in order to achieve required pitch-changing force.

Therefore, a new technology which can rapidly change the blade angle, avoid the sealing failure and cause the incapability of changing the blade, and has small volume, safety and stability is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a but quick response is with change blade angle, safety and stability, small and exquisite propeller device for turboprop engine.

In order to achieve the above object, the utility model discloses a screw device for turboprop adopts following technical scheme: the propeller device for the turboprop engine comprises a shell, blades and a variable propeller mechanism, wherein each blade is radially and rotatably assembled on the shell, each blade comprises a turntable, a blade and an eccentric driving lever which are integrally arranged, the blades and the turntables are coaxially arranged, the eccentric driving lever is eccentrically arranged on one side of the turntable, which is far away from the blades, the turntable and the eccentric driving lever are positioned in the shell, the blades are positioned outside the shell, a polygonal mounting cavity is formed between the turntables in the shell, the variable propeller mechanism comprises a motor, a speed reducer, a coupler and a lead screw which are sequentially connected in a transmission manner, the variable propeller mechanism further comprises a poking disc, the poking disc is arranged on the lead screw through a lead screw nut, the lead screw is rotatably assembled on the shell, the poking disc is positioned in the polygonal mounting cavity, the periphery of the poking disc is provided with a rotation stopping surface, the poking disc moves axially along the lead screw along with the rotation of the lead screw, the poking disc corresponds to each eccentric poking rod, a poking fork is arranged in a one-to-one correspondence mode and is provided with a U-shaped groove, each eccentric poking rod is inserted into the corresponding U-shaped groove, and the poking disc pushes the eccentric poking pin to rotate along the axis of the rotary disc through the groove wall of the U-shaped groove when moving axially along the lead screw so as to drive the blades to rotate.

The beneficial effect of this scheme: when the propeller device for the turboprop engine of the utility model is used on the turboprop engine, the variable propeller action is realized by replacing the traditional hydraulic mechanism mode with a mechanical mechanism, the motor drives the screw rod to act through the coupler after speed reduction, the toggle disc on the screw rod realizes the linear reciprocating motion of the toggle disc by the matching of a screw rod nut and the screw rod and the matching of a polygonal mounting cavity of the shell and a rotation stop surface of the toggle disc, due to the special structural design of the poking disc, the straight reciprocating motion of the poking disc drives the poking bars in the U-shaped grooves to move along with the poking disc, the poking bars move to drive the corresponding paddles to rotate on the shell by virtue of the turnplates, so that the angle adjustment of the paddles is realized, and in the movement process, the deflector rod has the movement in the axial direction and the partial movement in the vertical axial direction, and the partial movement in the vertical axial direction can be compensated in the U-shaped groove by depending on the structure of the U-shaped groove. Compared with the prior art, the high-pressure oil sealing ring has the advantages that a hydraulic mechanism is not adopted, so that the sealing problem is not involved, and the problems that the existing high-pressure oil sealing ring is easy to lose efficacy, leaks oil, pollutes the environment, causes safety accidents that the variable pitch cannot be realized and the like are solved; similarly, a hydraulic mechanism is not adopted, but mechanical transmission is adopted, the variable-pitch mechanism is small in size, few in system parts and simpler in structure than the prior art, the probability of maintenance and replacement is reduced, the variable-pitch mechanism is not easy to damage, and the related cost is reduced; more importantly, the motor drives the screw rod and shifting fork mechanism, the action of the motor is immediately transmitted to a rear execution component, the purpose of real-time adjustment and rapid adjustment of the blade angle is achieved, the hydraulic mechanism has the advantage of efficient response, compared with the existing hydraulic mechanism, the hydraulic mechanism has no problem of pitch delay caused by the power transmission time of a transmission medium, and the acceleration and deceleration performance of the airplane is remarkably improved.

On the basis of above-mentioned scheme, further improve as follows, stir the dish and include the disk body, screw nut installs in disk body center department, and disk body circumference is radial outside extension has a plurality ofly the shift fork, the shift fork include two along the disk body thickness direction interval set up dial the board, two dial and constitute between the board the U-shaped groove, the one end terminal surface of dialling the board and keeping away from the disk body constitutes the face that splines, the width of dialling the board is greater than the diameter of eccentric group pole.

The beneficial effect of this scheme: the special structural design of stirring dish can carry out effectual circumference on the one hand and the polygon installation cavity of shell and only rotate the cooperation, and on the other hand has realized axial reciprocating motion with the lead screw cooperation, and more crucial has integrated a plurality of shifting fork structures on it, can the angle of each paddle of synchronous adjustment, has promoted the unity of changing oar efficiency and each paddle angle.

On the basis of the scheme, the width of the shifting plate is further improved to be larger than the rotating radius of the eccentric shifting rod.

The beneficial effect of this scheme: the purpose of this is to ensure that the driver is constantly located between the two driver plates during the partial movement of the vertical axis.

On the basis of the scheme, the rotary table is further improved in the following manner, the longitudinal section of the rotary table is T-shaped, the shell is correspondingly provided with a rotary groove with the T-shaped longitudinal section, and the rotary table is arranged in a manner that the large-diameter end faces the inside of the shell and the small-diameter end faces the outside of the shell.

The beneficial effect of this scheme: this structure makes the carousel shift the centrifugal force that receives to the shell on, need not to set up in addition stop gear and carries on spacingly, simple structure to the paddle.

On the basis of the scheme, the improved structure is that the shell comprises two parts butted with each other, and the axis of each turntable is positioned on the butting face of the two parts of the shell.

The beneficial effect of this scheme: due to the T-shaped structure of the rotary disc, the shell is provided with two parts which are oppositely butted, so that the rotary disc is more convenient to mount and dismount.

On the basis of above-mentioned scheme, further improve as follows, the motor has two, and drive gear is installed to the output symmetry of two motors, is equipped with driven gear between two drive gears, and driven gear meshes the transmission with two drive gears simultaneously, and the diameter of drive gear is less than the driven gear diameter in order to realize first order speed reduction transmission.

The beneficial effect of this scheme: on one hand, the double motors are mutually backed up, any one motor is damaged, and the other motor can still continue to complete the pitch variation action, so that the safety is ensured; on the other hand, the double motors simultaneously participate in transmission, and the transmission is synchronous, so that the load of a single motor can be reduced, the requirement of large-torque alternating load can be met, and the service life of the motor can be obviously prolonged due to the reduction of the load of the single motor; in addition, the mode that the driven gear synchronously meshes the two driving gears is adopted, the purpose of synchronous transmission can be realized by a simple structure, and meanwhile, the first-stage speed reduction transmission can be realized by utilizing the characteristic that the diameter of the driving gear is smaller than that of the driven gear.

On the basis of the scheme, the speed reducer is further improved as follows, the speed reducer comprises a planet wheel, a sun wheel of the planet wheel is in transmission connection with the driven gear, a gear ring of the planet wheel is in transmission connection with the lead screw, and secondary speed reduction transmission can be achieved.

The beneficial effect of this scheme: the planet gear is used as the second-stage large-speed-ratio reduction transmission, and the device has the characteristics of small size, high reduction efficiency and small power loss.

On the basis of the scheme, the power of the motor is 150W in a further improvement mode. When the scheme is verified, the pitch-variable push-pull force of more than 3 tons is realized by using the 150W motor and the reduction gear box, the pitch-variable push-pull force is far higher than that of a hydraulic mechanism of a propeller with the same specification and is smaller than 1 ton, and the pitch-variable force requirement under various working conditions can be realized.

On the basis of the scheme, the speed reducer is further improved as follows, a speed reducer shell is arranged outside the speed reducer, a coupler shell is arranged outside the coupler, a motor installation shell is arranged outside the motor, and the motor installation shell, the speed reducer shell, the coupler shell and the shell are sequentially detachably connected for protection.

On the basis of the scheme, the screw rod is further improved as follows, and the ball screw or the trapezoidal screw rod is selected as the screw rod.

On the basis of above-mentioned scheme, further improve as follows, the motor has threely, and drive gear is installed respectively to the output of three motor, is equipped with driven gear between the three drive gear, and driven gear meshes the transmission with three drive gear simultaneously, and three drive gear evenly arranges along driven gear's circumference, and drive gear's diameter is less than driven gear diameter in order to realize first order speed reduction transmission.

Drawings

FIG. 1 is a partial perspective view of a turboprop;

fig. 2 is a perspective view of the propeller arrangement of fig. 1 (the blade shape is only schematic);

FIG. 3 is a perspective view of a pitch mechanism;

FIG. 4 is a longitudinal cross-sectional schematic view of a pitch mechanism;

FIG. 5 is a state diagram of the fitting of the dial and the paddle;

FIG. 6 is a cross-sectional view of the engagement of the dial plate with the paddles and the housing;

FIG. 7 is a diagram showing the positional relationship between the dial plate and each of the paddles;

FIG. 8 is a perspective view of the dial plate;

FIG. 9 is a perspective view of the blade;

FIG. 10 is a front view of the housing;

FIG. 11 is a transmission diagram of the core components of the dual motors and the speed reducer;

in the figure: 1-supporting seat, 2-main shaft, 21-electric brush slip ring, 3-propeller device, 31-shell, 311-polygonal mounting cavity, 32-blade, 321-rotary disc, 322-blade, 323-eccentric deflector rod, 33-variable pitch mechanism, 331-motor, 332-reducer, 3321-driving gear, 3322-driven gear, 3323-planet gear, 333-lead screw, 334-deflector disc, 3341-rotation stopping surface, 3342-disc body, 3343-shift fork, 3344-dial plate, 3345-U-shaped groove, 335-lead screw nut and 4-coupler.

Detailed Description

The utility model discloses a propeller device's for turboprop engine concrete embodiment, turboprop engine include gas turbine engine, decelerator and screw device, and turboprop engine's rationale is current maturation technology, and its theory of operation, structure etc. are searched for very easily on the browser, and this partial structure and the utility model discloses a point of improvement is irrelevant, only needs to know that gas turbine engine can drive the screw rotation through decelerator to produce the pulling force in screw department and drive the body and remove, here for saving the space, no longer detailed description. Fig. 1 shows a connection state diagram of the propeller device 3 and the main shaft 2 in the prior art, and it can be seen from the diagram that one end of the propeller device 3 is connected with the main shaft 2, and the other end is connected with the variable pitch mechanism 33, the main shaft 2 is rotatably assembled on the supporting base 1 through the bearing, the power line and the communication cable at the propeller device 3 are arranged through the center hole of the main shaft 2 and are connected to the slip ring of the main shaft 2, the slip ring is in relative sliding contact with the electric brush on the supporting base 1, and the normal transmission of current can be realized while the rotation is ensured.

More specifically, as the main improved propeller device 3 of the present invention, the propeller device 3 is an integrated module, and the structure thereof is shown in fig. 2-10, the propeller device 3 includes a housing 31, blades 32 and a pitch mechanism 33, each blade 32 is radially and rotatably assembled on the housing 31, in this embodiment, there are five blades 32, each blade 32 includes a turntable 321, a blade 322 and an eccentric shift lever 323, which are integrally arranged, the blade 322 and the turntable 321 are coaxially arranged, the eccentric shift lever 323 is eccentrically arranged on a side of the turntable 321 away from the blade 322, the turntable 321 and the eccentric shift lever 323 are arranged in the housing 31, the blade 322 is arranged outside the housing 31, a polygonal mounting cavity 311 is formed between the turntables 321 in the housing 31, the pitch mechanism 33 includes a motor 331, a reducer 332, a coupler 4 and a lead screw 333 which are sequentially connected in a transmission manner, the pitch mechanism 33 further includes a shift disc 334, the poking disc 334 is mounted on the screw rod 333 through a screw nut 335, the screw rod 333 is rotatably assembled on the shell 31, the poking disc 334 is located in the polygonal mounting cavity 311, the periphery of the poking disc 334 is provided with a rotation stopping surface 3341, the poking disc 334 is in circumferential rotation stopping fit with the wall of the polygonal mounting cavity 311 through the rotation stopping surface 3341 and in axial sliding fit, the poking disc 334 axially moves along the screw rod 333 along with the rotation of the screw rod 333, the poking disc 334 is provided with U-shaped grooves 3345 corresponding to the eccentric poking rods 323 one by one, the eccentric poking rods 323 are inserted in the corresponding U-shaped grooves 3345, and when moving axially along the screw rod 333, the poking disc 334 pushes the eccentric poking pins to rotate along the axis of the rotating disc 321 through the groove walls.

In this embodiment, as shown in fig. 6 to 8, the dial plate 334 includes a plate body 3342, the screw nut 335 is installed at the center of the plate body 3342, the plate body 3342 extends radially outward in the circumferential direction, the shift fork 3343 includes two dial plates 3344 spaced apart along the thickness direction of the plate body 3342, a U-shaped groove 3345 is formed between the two dial plates 3344, an end surface of the dial plate 3344 away from the plate body 3342 forms a rotation stop surface 3341, and the width of the dial plate 3344 is greater than the diameter of the eccentric dial 323. The special structural design of the poking disc 334 can carry out effective circumferential rotation stopping cooperation with the polygonal mounting cavity 311 of the shell 31 on the one hand, and on the other hand, axial reciprocating motion is realized in cooperation with the lead screw 333, more importantly, a plurality of poking forks 3343 structures are integrated on the poking disc, so that the angle of each blade 32 can be synchronously adjusted, and the uniformity of the variable pitch efficiency and the angle of each blade 32 is improved. The width of the toggle plate 3344 is greater than the radius of rotation of the eccentric toggle 323. The purpose of this is to ensure that the shift lever is constantly between the two shift plates 3344 during the partial movement of the vertical axis. The longitudinal section of the rotating disc 321 is "T" shaped, the housing 31 is correspondingly provided with a rotating groove with a "T" shaped longitudinal section, and the rotating disc 321 is arranged in a manner that the large diameter end faces the inside of the housing 31 and the small diameter end faces the outside of the housing 31. This structure makes carousel 321 can shift the centrifugal force that receives to shell 31 on, need not to set up in addition stop gear and carries out spacingly, simple structure to paddle 32.

In the present embodiment, as shown in fig. 2, the housing 31 includes two parts that are butted against each other, and the axis of each turntable 321 is located on the butting surface of the two parts of the housing 31. Due to the T-shaped structure of the turntable 321, the two parts of the housing 31 are oppositely butted, so that the turntable 321 is more convenient to mount and dismount.

In this embodiment, as shown in fig. 3, 4 and 11, there are two motors 331, the output ends of the two motors 331 are symmetrically provided with driving gears 3321, a driven gear 3322 is arranged between the two driving gears 3321, the driven gear 3322 and the two driving gears 3321 are simultaneously in meshing transmission, and the diameter of the driving gear 3321 is smaller than that of the driven gear 3322 to realize the first-stage speed reduction transmission. On one hand, the double motors 331 back up each other, when any one motor 331 is damaged, the other motor 331 can still continue to complete the pitch changing action, and the safety is ensured; on the other hand, the dual motors 331 simultaneously participate in transmission, and the transmission is synchronous, so that the load of a single motor 331 can be reduced, the requirement of large-torque alternating load can be met, and the service life of the motor 331 can be obviously prolonged due to the reduction of the load of the single motor 331; in addition, the driven gear 3322 is synchronously meshed with the two driving gears 3321, the synchronous transmission can be realized by a simple structure, and meanwhile, the first-stage speed reduction transmission can be realized by utilizing the characteristic that the diameter of the driving gear 3321 is smaller than that of the driven gear 3322. The speed reducer 332 comprises a planet wheel 3323, a sun wheel of the planet wheel 3323 is in transmission connection with a driven gear 3322, and a gear ring of the planet wheel 3323 is in transmission connection with a screw 333, so that second-stage speed reduction transmission can be realized. The planet gear 3323 is used for second-stage large-speed-ratio speed reduction transmission, and has the characteristics of small size, high speed reduction efficiency and small power loss. The housing 31 is connected to the main shaft 2 at an end away from the motor 331, the main shaft 2 has a central hole, a power line and a signal line of the propeller device 3 pass through the central hole, the main shaft 2 is further provided with a brush slip ring 21, and one end of the power line and the signal line is electrically connected to the brush slip ring 21. Through the high-performance electric brush slip ring 21 with the communication line (generally, the electric brush slip ring 21 with higher reliability is selected), the electric and signal wires are connected to the end of the propeller device 3 from the center hole of the main shaft 2, and the problem of electric power and communication transmission of the rotating stirring paddle is effectively solved. The motor 331 has a power of 150W. When the scheme is verified, the pitch-variable push-pull force of more than 3 tons is realized by using the motor 331 of 150W and the reduction gear and the reduction gearbox, the pitch-variable push-pull force is far higher than that of a hydraulic mechanism of the propeller device 3 with the same specification and is smaller than 1 ton, and the pitch-variable force requirement under various working conditions can be realized.

In this embodiment, as shown in fig. 1, the turboprop further includes a support base 1, the main shaft 2 is rotatably assembled on the support base 1 through a bearing, a slip ring of the brush slip ring 21 is fixed on the main shaft 2, the brush is fixed relative to the support base 1, and the brush is in sliding fit with the slip ring. As shown in fig. 2, a reducer casing is disposed outside the reducer 332, a coupler 4 casing is disposed outside the coupler 4, a motor mounting casing is disposed outside the motor 331, and the motor mounting casing, the reducer casing, the coupler 4 casing, and the housing 31 are sequentially detachably connected for protection. The screw 333 is a ball screw or a trapezoidal screw.

In other embodiments, there are three motors 331, the output ends of the three motors 331 are respectively provided with a driving gear 3321, a driven gear 3322 is arranged between the three driving gears 3321, the driven gear 3322 is in mesh transmission with the three driving gears 3321, the three driving gears 3321 are uniformly arranged along the circumferential direction of the driven gear 3322, and the diameter of the driving gear 3321 is smaller than that of the driven gear 3322 to realize the first-stage speed reduction transmission. The speed reducer 332 comprises a planet wheel 3323, a sun wheel of the planet wheel 3323 is in transmission connection with a driven gear 3322, and a gear ring of the planet wheel 3323 is in transmission connection with a screw 333, so that second-stage speed reduction transmission can be realized. Reducer 332's outside is equipped with the reduction gear casing, and 4 outsides of shaft coupling are equipped with 4 casings of shaft coupling, and the outside of motor 331 is equipped with motor installation casing, and motor installation casing, reduction gear casing, 4 casings of shaft coupling and shell 31 are detachable connection in proper order in order to protect.

When the turboprop engine of the utility model is used, the traditional hydraulic mechanism mode is replaced by a mechanical mechanism, the motor 331 drives the screw 333 to act through the coupler 4 after speed reduction, the poking disc 334 on the screw 333 is matched with the screw 333 by the screw nut 335 and the screw 333, and the polygonal mounting cavity 311 of the shell 31 is matched with the rotation stopping surface 3341 of the poking disc 334, thereby realizing the linear reciprocating motion of the poking disc 334, due to the special structural design of the toggle disc 334, the linear reciprocating motion of the toggle disc 334 drives the toggle rods in the U-shaped grooves 3345 to move along with the toggle rods, and the toggle rods move to drive the corresponding blades 32 to rotate on the shell 31 by virtue of the rotating discs 321, so that the angle of the blades 32 is adjusted, and in the movement process, the deflector rod has axial movement and vertical axial partial movement, and the vertical axial partial movement can be compensated in the U-shaped groove 3345 by means of the structure of the U-shaped groove 3345. Compared with the prior art, the high-pressure oil sealing ring has the advantages that a hydraulic mechanism is not adopted, so that the sealing problem is not involved, and the problems that the existing high-pressure oil sealing ring is easy to lose efficacy, leaks oil, pollutes the environment, causes safety accidents that the variable pitch cannot be realized and the like are solved; similarly, a hydraulic mechanism is not adopted, but mechanical transmission is adopted, the variable pitch mechanism 33 is small in size, few in system parts, simpler in structure than the prior art, low in maintenance and replacement probability, not easy to damage and low in related cost; more importantly, the motor 331 drives the screw 333 and the shifting fork 3343, and the action of the motor 331 is immediately transmitted to the following executing component, so that the purpose of real-time adjustment and rapid adjustment of the angle of the blade 32 is achieved.

Claims

1. The propeller device for the turboprop engine is characterized by comprising a shell, blades and a variable propeller mechanism, wherein each blade is radially assembled on the shell in a rotating mode, each blade comprises a rotating disc, a blade and an eccentric driving lever which are integrally arranged, the blades and the rotating discs are coaxially arranged, the eccentric driving lever is eccentrically arranged on one side, away from the blades, of the rotating disc, the rotating disc and the eccentric driving lever are positioned in the shell, the blades are positioned outside the shell, each blade is internally arranged on the shell, a polygonal installation cavity is formed between the rotating discs, the variable propeller mechanism comprises a motor, a speed reducer, a coupler and a lead screw which are sequentially connected in a transmission mode, the variable propeller mechanism further comprises a stirring disc, the stirring disc is arranged on the lead screw through a lead screw nut, two ends of the lead screw are rotatably assembled on the shell through double-row angular contact ball bearings, the stirring disc is positioned in the polygonal installation cavity, the axial sliding fit, the stirring dish is along lead screw axial displacement along the rotation of lead screw, and the stirring dish corresponds to each eccentric driving lever one-to-one is provided with the shift fork, and the shift fork has the U-shaped groove, and each eccentric driving lever cartridge is in the U-shaped inslot that corresponds, and the wall through the U-shaped groove promotes eccentric shifting pin when stirring the dish along lead screw axial displacement and rotates in order to drive the paddle rotation along the axis of carousel.

2. The propeller device of claim 1, wherein the dial plate includes a plate body, the screw nut is installed at the center of the plate body, the plate body extends radially outward in the circumferential direction, the shift fork includes two dial plates spaced apart in the thickness direction of the plate body, the U-shaped groove is formed between the two dial plates, the end surface of the dial plate, which is far away from the plate body, forms the rotation stop surface, and the width of the dial plate is greater than the diameter of the eccentric dial plate.

3. The propeller arrangement for a turboprop according to claim 2, wherein the width of the paddle is greater than the radius of rotation of the eccentric paddle.

4. The propeller device for a turboprop according to any one of claims 1 to 3, wherein the longitudinal section of the rotating disk is "T" shaped, and the housing is provided with a rotating groove having a longitudinal section of "T" shape, and the rotating disk is disposed such that the larger diameter end faces the inside of the housing and the smaller diameter end faces the outside of the housing.

5. A propeller arrangement for a turboprop according to any one of claims 1 to 3, wherein the housing comprises two parts which abut against each other, the axis of each rotor disc being located on the abutment surface of the two parts of the housing.

6. A propeller arrangement for a turboprop according to any one of claims 1 to 3, wherein the power of the motor is 150W.

7. The propeller device for a turboprop according to any one of claims 1 to 3, wherein a reducer case is provided outside the reducer, a coupling case is provided outside the coupling, a motor mounting case is provided outside the motor, and the motor mounting case, the reducer case, the coupling case, and the housing are detachably connected in this order for protection.

8. A propeller arrangement for a turboprop according to any one of claims 1 to 3, wherein the screw is a ball screw or a trapezoidal screw.