A multifunctional independent twin propeller pod propeller

Abstract

The application discloses a multifunctional independent double-screw propeller, which comprises a lifting device, a rotating device, a propeller adjusting device and an independent control propeller assembly. The rotating device is installed on the upper surface of a deck, and the lifting device is installed on the rotating device. The lifting device comprises a hydraulic top plate arranged on the top of the lifting device. The independent control propeller assembly passes through the deck, the rotating device and the lifting device from below the deck in sequence and is fixed to the bottom of the hydraulic top plate. The independent control propeller assembly comprises two independent propeller bodies. The propellers on the two propeller bodies are arranged oppositely and separately. The propeller adjusting device is arranged on the propeller blade of each propeller. The application realizes the functions of lifting, 360-degree rotation, independent control of double propellers, backup of double propellers, adjustable propeller moment and motion compensation of the pod propeller, and provides great help for the ship in the polar ice breaking and other harsh conditions and ship control.

Description

TECHNICAL FIELD

[0001] The present application relates to a pod propulsion device, in particular to a multifunctional independent double propeller pod propulsion device. BACKGROUND

[0002] The first pod propulsion device is based on the demand for ice-breaking ships in ice conditions, which is a propulsion device integrating propulsion and steering devices, greatly increasing the flexibility of ship design, construction and use, and attracting widespread attention in the world shipbuilding industry.

[0003] At present, the commonly used pod propulsion devices at home and abroad are mostly single propeller or coaxial double propeller structure, and most of them are not liftable, which leads to the inability to adapt to changing navigation conditions and harsh polar weather, and also has disadvantages in propulsion efficiency and safety.

[0004] For example, patent CN201520466422.8 designs a new pod propulsion device shape, but still adopts a single propeller structure, which greatly reduces safety when the propeller cannot work normally; patent CN202021179734.8 drives the fixed pin into the corresponding pin hole through the hydraulic cylinder to realize the lifting of the propulsion device, but the device has a large volume, and because the fixed pin cooperates with the pin hole, the overall installation precision is high; patent CN202010581124.9 uniformly arranges two thrust fins on the propulsion device cylinder, sets a propeller at one end and a tail fin at the other end, thereby reducing ship resistance and improving propulsion efficiency. SUMMARY

[0005] The purpose of the present application is to provide a multifunctional independent double propeller pod propulsion device, which can adjust multiple functions according to different weather conditions, provide help for ship to deal with polar icebreaking and other harsh conditions and ship control, and improve propulsion efficiency, so that safety is more guaranteed.

[0006] Technical scheme: A multifunctional independent double propeller pod propulsion device, comprising a lifting device, a rotating device, a propeller adjusting device and an independent control propulsion device assembly, the rotating device is installed on the upper surface of the deck, the lifting device is installed on the rotating device, the lifting device comprises a hydraulic top plate arranged at the top thereof, the independent control propulsion device assembly passes through the deck, the rotating device and the lifting device from below the deck in sequence and is fixed to the bottom of the hydraulic top plate, the independent control propulsion device assembly comprises two independent propulsion device bodies, the propellers on the two propulsion device bodies are arranged in opposite directions, and the propeller blades of each propeller are respectively provided with a propeller adjusting device.

[0007] Further, the lifting device further comprises a hydraulic bottom plate, a hydraulic cylinder, and a spherical universal joint. The hydraulic bottom plate is fixed to the rotating device. The hydraulic top plate is arranged above the hydraulic bottom plate. The two are connected by a plurality of spaced hydraulic cylinders. The hydraulic cylinder barrel of the hydraulic cylinder is fixed to the upper surface of the hydraulic bottom plate. The hydraulic cylinder piston rod is fixed to the hydraulic cylinder piston and connected to the lower surface of the hydraulic top plate through the spherical universal joint.

[0008] Preferably, the number of hydraulic cylinders is four, which are vertically arranged and the connecting lines of the four are arranged in a rectangular shape. When hydraulic oil is injected into the hydraulic cylinder body, the hydraulic cylinder piston rod is driven by the internal pressure of the oil to realize linear reciprocating motion in the vertical direction.

[0009] Further, the rotating device comprises a rotating spur gear, a shaft cylinder, a rotating gear, a stepping motor, and a motor fixing piece. The rotating gear is rotatably installed on the upper surface of the deck through the shaft cylinder. The lifting device is installed on the rotating gear. The stepping motor is installed on the deck through the motor fixing piece. The rotating spur gear is connected to the stepping motor and engaged with the rotating gear. The independently controlled propeller assembly is arranged in the shaft cylinder.

[0010] The rotating gear is driven by the gear transmission to realize 360° full rotation, thereby driving the lifting device on it to rotate together. The independently controlled propeller assembly is connected to the lifting device, so that it can also rotate together.

[0011] Further, the independently controlled thruster assembly further comprises a left cabin body support and a right cabin body support, which are vertically arranged side by side. The upper parts of the left cabin body support and the right cabin body support are fixed to the bottom of the hydraulic top plate, respectively. The lower parts are respectively provided with a thruster body.

[0012] Further, the thruster body further comprises a permanent magnet motor, a permanent magnet motor bearing, and a permanent magnet motor front end cover. The permanent magnet motor front end cover is installed in the front of the permanent magnet motor through the permanent magnet motor bearing. The permanent magnet motor rotor of the permanent magnet motor penetrates the permanent magnet motor front end cover and is connected to the propeller.

[0013] The power line is connected to the corresponding permanent magnet motor through the straight hole of the left cabin body support and the right cabin body support, respectively, so as to realize the functions of adjustable speed of the two propellers without interference and mutual backup.

[0014] The left cabin body support and the right cabin body support are both provided with a plurality of through holes for placing strong electricity, weak electricity, oil, water, etc. This has the advantages of increasing the anti-interference ability between strong and weak electricity and realizing oil-water separation.

[0015] Preferably, the propeller further comprises a propeller hub and a fairing. A plurality of propeller blades are rotatably installed on the circumference of the propeller hub. Each propeller blade is adjusted in angle by a pitch adjusting device. The fairing is installed at the front end of the propeller hub.

[0016] Best, the propeller adjusting device comprises a servo motor, a propeller adjusting spur gear, a wheel hub internal gear and a reduction box, the servo motor is installed on the propeller wheel hub, the propeller adjusting spur gear is connected with the motor shaft of the servo motor through the reduction box, a groove is formed on the end face of the propeller blade root in the axial direction, the wheel hub internal gear is arranged in the groove, and the propeller adjusting spur gear is meshed with the wheel hub internal gear.

[0017] Best, the propeller adjusting device further comprises a pitch angle encoder, and the pitch angle encoder is installed on the motor shaft of the servo motor and used for motor angle feedback.

[0018] Best, the number of propeller blades on each propeller is 4.

[0019] The servo control system is used in the propeller adjusting device to control the pitch angle of each propeller blade, and each propeller blade is separately adjusted by a servo motor with angle feedback, the motor angle feedback adopts the pitch angle encoder, the encoder is installed on the motor shaft, and the servo motor realizes closed-loop control of the rotation speed and the rotation angle.

[0020] Advantages: compared with the prior art, the propeller adjusting device has the following advantages:

[0021] 1、The pod propeller in the application can flexibly adjust its height and inclination angle through the lifting device to provide greater thrust and efficiency, and can play a great role in icebreaking and other harsh conditions.

[0022] 2、The pod propeller in the application realizes full rotation through gear engagement, thereby changing the direction of the propulsive force, the device has simple structure and convenient installation, and can make the ship better complete horizontal translation, accurate positioning, reverse driving and other operations.

[0023] 3、The pod propeller in the application adopts independent control of front and rear propellers, which means that the rotation speeds of the front and rear propellers are adjustable and independent of each other, and are backed up to each other, thereby greatly improving the safety and reliability during navigation.

[0024] 4、The propeller in the application adopts an adjustable propeller mode, which changes the pitch angle of the propeller blade under different navigation conditions to provide greater thrust.

[0025] 5、The lifting device in the application is connected with the hydraulic cylinder through a spherical universal joint, when the ship body tilts, the pod propeller also tilts, so that the four hydraulic cylinders are high in front and low in back or low in front and high in back, that is, motion compensation is realized to ensure the relative levelness of the pod propeller, so that the ship can pass through the wave crest and trough more safely and quickly. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a front view structural schematic diagram of the present invention;

[0027] Figure 2 It is a side structural schematic diagram of the present invention;

[0028] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0029] Figure 4 It is a structural diagram of the coordination between the pitch control device and the propeller;

[0030] Figure 5 Schematic diagram of the structure of the propeller body without the propeller. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and specific examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0032] A multifunctional independent twin-propeller pod propulsion system, such as Figures 1-5 As shown, it includes a lifting device, a rotating device, a pitching device, and an independently controlled propeller assembly.

[0033] The rotating device is installed on the upper surface of the deck 1. The rotating device includes a rotating spur gear 2, a shaft cylinder 7, a rotating pinion 8, a stepper motor 15, and a motor fixing part 16. The rotating pinion 8 is rotatably installed on the upper surface of the deck 1 through the shaft cylinder 7. The stepper motor 15 is installed on the deck 1 through the motor fixing part 16. The rotating spur gear 2 is connected to the stepper motor 15 and meshes with the rotating pinion 8.

[0034] The lifting device is installed on the rotary pinion 8. The lifting device includes a hydraulic base plate 9, a hydraulic cylinder, a hydraulic top plate 13, and a spherical universal joint 14. The hydraulic base plate 9 is fixed to the upper surface of the rotary pinion 8. The hydraulic top plate 13 is spaced apart above the hydraulic base plate 9. The two are connected by a plurality of hydraulic cylinders arranged at intervals. There are 4 hydraulic cylinders, which are placed vertically and the connecting lines of the four are arranged in a rectangular interval. The hydraulic cylinder barrel 10 of the hydraulic cylinder is fixed to the upper surface of the hydraulic base plate 9. The hydraulic cylinder piston 12 and the hydraulic cylinder piston rod 11 are connected to the lower bottom surface of the hydraulic top plate 13 through the spherical universal joint 14, so that the hydraulic top plate 13 is set on the top of the lifting device.

[0035] The independent control propeller assembly comprises two independent propeller bodies, a left cabin body support 4 and a right cabin body support 27, the left cabin body support 4 and the right cabin body support 27 pass through the deck 1, the shaft cylinder 7 and the lifting device in sequence from the bottom of the deck 1 to the top, the upper parts of the left cabin body support 4 and the right cabin body support 27 are fixed to the bottom of the hydraulic top plate 13, and the lower parts are respectively provided with a propeller body, the propeller bodies are arranged in opposite directions, the propeller body further comprises a permanent magnet motor, a permanent magnet motor bearing 24 and a permanent magnet motor front end cover 25, the permanent magnet motor comprises a permanent magnet motor stator 22 and a permanent magnet motor rotor 23, the permanent magnet motor front end cover 25 is installed at the front of the permanent magnet motor through the permanent magnet motor bearing 24, the permanent magnet motor rotor 23 of the permanent magnet motor passes through the permanent magnet motor front end cover 25 and is connected with the propeller, the left cabin body support 4 and the right cabin body support 27 are below the hydraulic top plate 13, so that the propeller body is lifted together when the hydraulic cylinder works, the permanent magnet motor stator 22 is fixed to the left cabin body support 4 or the right cabin body support 27, the two permanent magnet motor rotors are not connected with each other, and the two cabins are closed and independently powered.

[0036] The propeller comprises propeller blades 3, a propeller hub 5 and a fairing 6, a plurality of propeller blades 3 are arranged on the propeller hub 5 in a circumferential direction, the propeller blades 3 are matched with the propeller hub 5, and the two are not a fixed whole but are movably connected, the number of the propeller blades 3 on each propeller is four, each propeller blade 3 is adjusted in angle through a pitch adjusting device, and the fairing 6 is arranged at the front end of the propeller hub 5.

[0037] The pitch adjusting device comprises a servo motor 17, a pitch adjusting spur gear 18, an inner gear 19, a pitch angle encoder 20 and a speed reducer 21, the servo motor 17 is arranged on the propeller hub 5, the pitch adjusting spur gear 18 is connected with the motor shaft of the servo motor 17 through the speed reducer 21, a groove is arranged on the end face of the root of the propeller blade 3 in an axial direction, the inner gear 19 is arranged in the groove, the pitch adjusting spur gear 18 is meshed with the inner gear 19, and the pitch angle encoder 20 is arranged on the motor shaft of the servo motor 17 and is used for feedback of the motor rotation angle.

[0038] The present application combines various mechanisms together to realize the functions of lifting and pitch adjusting of the double propellers, the system power supply is two permanent magnet motors which are respectively powered to drive the propeller to rotate, the stepping motor is started, the rotation of the rotation pair gear is realized through gear meshing, the gear transmission has the advantages of reliable transmission of motion, constant instantaneous transmission ratio, large applicable load and speed range, high use efficiency, long service life and compact structure, when the hydraulic cylinder works, the hydraulic cylinder piston rod moves in a reciprocating straight line, various elements of the hydraulic transmission can be conveniently and flexibly arranged according to the needs, and the hydraulic cylinder has the advantages of light weight, small volume, small motion inertia and fast response speed.

[0039] The application can provide sufficient thrust for large ship navigation and improve the response capability in extreme environment. Common working modes are as follows:

[0040] 1. In normal working, the front and rear propellers rotate in the same direction independently, and provide forward power or reverse thrust. The pitch angle changes with the flow rate, so as to adapt to the change of flow rate and maximize the use of water kinetic energy.

[0041] 2. When braking is needed, the front propeller is reversed, and the rear propeller can be used as a generator. When emergency braking is needed, the front and rear propellers are reversed, and both provide reverse thrust, so that the ship can stop quickly. At the same time, both propellers can generate electricity to provide energy.

[0042] 3. When encountering heavy wind and waves, the hydraulic cylinder starts to work. Through the real-time attitude of the ship, the extension and retraction of the four hydraulic cylinder piston rods can ensure that the propeller is always horizontal, so that the thrust of the ship is always forward, and the ship can pass through the wave crest and trough more quickly and safely.

[0043] 4. When encountering ice breaking conditions, the front propeller breaks ice, and the rear propeller provides power, while adjusting the pitch angle of the front propeller to better cut the ice layer and prevent the propeller from being damaged. The pitch angle of the rear propeller is small, which can better provide power and speed up the ice breaking speed.

[0044] The specific operation of the pod propeller to realize the related functions: when the system power is connected to the two permanent magnet motors through the through holes on the left and right pod body supports respectively, the propeller starts to rotate, and the independent control of the front and rear propellers can be realized, and when one of them cannot work normally, it does not affect the operation of the other, so the reliability is greatly improved. When the propeller rotates, in order to adapt to different flow rates, the motor rotation angle is fed back by the pitch angle encoder, the power is transmitted by the servo motor and the reduction box, the pitch adjustment is completed by the engagement of the pitch adjustment spur gear and the hub inner gear. Referring to Figure 3 , after the stepping motor is connected to the power supply, the transmission shaft is fixed with the rotation spur gear, which is engaged with the rotation gear, so the rotation spur gear and the rotation gear rotate in opposite directions. Referring to Figure 1 , the whole lifting device is on the rotation gear, and rotates with the whole lifting device. The left and right pod body supports are connected with the hydraulic top plate, so the full rotation of the pod propeller can be realized. It should be particularly noted that because the hydraulic cylinder is connected with the hydraulic top plate through the spherical universal joint, the extension and retraction speed of the hydraulic cylinder piston rod can be adjusted through motion compensation. The purpose of this is that when the ship tilts, the pod propeller can still remain relatively horizontal, so that the navigation is safer and more reliable.

Claims

1. A multi-functional independent twin propeller pod propulsor characterized by: The lifting device, the rotating device, the adjusting propeller device, and the independently controlled propeller assembly are sequentially arranged from bottom to top of the deck (1), the rotating device is arranged on the upper surface of the deck (1), the lifting device is arranged on the rotating device, the lifting device comprises a hydraulic top plate (13) arranged on the top of the lifting device, the independently controlled propeller assembly is sequentially arranged through the deck (1), the rotating device, and the lifting device from bottom to top of the deck (1) and is fixed to the bottom of the hydraulic top plate (13), the independently controlled propeller assembly comprises two independently controlled propeller bodies, the propellers of the two propeller bodies are arranged in opposite directions, and the propeller blades (3) of each propeller are respectively provided with the adjusting propeller device. The lifting device further comprises a hydraulic bottom plate (9), a hydraulic cylinder, and a spherical universal joint (14), the hydraulic bottom plate (9) is fixed to the rotating device, the hydraulic top plate (13) is arranged above the hydraulic bottom plate (9) in a spaced manner, the two are connected through a plurality of spaced hydraulic cylinders, the hydraulic cylinder barrel (10) of the hydraulic cylinder is fixed to the upper surface of the hydraulic bottom plate (9), the hydraulic cylinder piston rod (11) is fixed to the hydraulic cylinder piston (12) and is connected to the lower surface of the hydraulic top plate (13) through the spherical universal joint (14). The rotating device comprises a rotating spur gear (2), a shaft cylinder (7), a rotating gear (8), a stepping motor (15), and a motor fixing part (16), the rotating gear (8) is rotatably arranged on the upper surface of the deck (1) through the shaft cylinder (7), the lifting device is arranged on the rotating gear (8), the stepping motor (15) is arranged on the deck (1) through the motor fixing part (16), the rotating spur gear (2) is connected to the stepping motor (15) and is engaged with the rotating gear (8), and the independently controlled propeller assembly is arranged in the shaft cylinder (7). The independently controlled propeller assembly further comprises a left cabin body support (4) and a right cabin body support (27), the two are arranged in parallel and vertically, the upper parts of the left cabin body support (4) and the right cabin body support (27) are respectively fixed to the bottom of the hydraulic top plate (13), and the lower parts are respectively provided with one propeller body. The propeller body further comprises a permanent magnet motor, a permanent magnet motor bearing (24), and a permanent magnet motor front end cover (25), the permanent magnet motor front end cover (25) is arranged at the front of the permanent magnet motor through the permanent magnet motor bearing (24), the permanent magnet motor rotor (23) of the permanent magnet motor penetrates through the permanent magnet motor front end cover (25) and is connected to the propeller.

2. A multi-functional independent twin propeller pod propulsor according to claim 1, characterized in that: The number of the hydraulic cylinders is four, the four are arranged in a rectangular shape in sequence.

3. A multi-functional independent twin propeller pod propulsor according to claim 1, characterized in that: The propeller further comprises a propeller hub (5) and a spinner (6), a plurality of propeller blades (3) are rotatably arranged on the propeller hub (5) in a circumferential direction, the angle of each propeller blade (3) is adjusted through the adjusting propeller device, and the spinner (6) is arranged at the front end of the propeller hub (5).

4. A multi-functional independent twin propeller pod according to claim 3, wherein: The propeller adjusting device comprises a servo motor (17), a propeller adjusting spur gear (18), a wheel hub internal gear (19) and a speed reducer (21), the servo motor (17) is installed on the propeller wheel hub (5), the propeller adjusting spur gear (18) is connected with the motor shaft of the servo motor (17) through the speed reducer (21), a groove is formed on the end face of the root of the propeller blade (3) in the axial direction, the wheel hub internal gear (19) is arranged in the groove, and the propeller adjusting spur gear (18) is engaged with the wheel hub internal gear (19).

5. A multi-functional independent twin propeller pod propulsor according to claim 4, characterized in that: The propeller adjusting device further comprises a pitch angle encoder (20), the pitch angle encoder (20) is installed on the motor shaft of the servo motor (17) and is used for motor angle feedback.

6. A multi-functional independent twin propeller pod according to any one of claims 1, 3-5, wherein: The number of the propeller blades (3) on each propeller is four.

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