CN110733622A - Variable-diameter marine propeller with self-adaptive tip vortex eliminating device and tip vortex eliminating method thereof - Google Patents
Variable-diameter marine propeller with self-adaptive tip vortex eliminating device and tip vortex eliminating method thereof Download PDFInfo
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- CN110733622A CN110733622A CN201911000194.4A CN201911000194A CN110733622A CN 110733622 A CN110733622 A CN 110733622A CN 201911000194 A CN201911000194 A CN 201911000194A CN 110733622 A CN110733622 A CN 110733622A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/28—Other means for improving propeller efficiency
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- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a variable diameter marine propeller with a self-adaptive tip vortex eliminating device and a tip vortex eliminating method thereof. The existing variable-diameter marine propeller cannot self-adaptively eliminate or break tip vortexes. The blade root of the propeller for the variable diameter ship is fixed with the sealing ball and the incomplete gear; the incomplete gear is meshed with a straight rack fixed on a ship shaft push-pull rod; the fixed belt wheel is fixed on the inner wall of the hollow ship shaft; a synchronous belt pulley is hinged at the end of the blade tip in the through groove of the blade; the fixed belt wheel is connected with the synchronous belt wheel through a synchronous belt; a sealing film is adhered to the blade tip of the paddle; the tail of the vortex eliminating wing fixed on the vortex eliminating wing wheel penetrates out of the sealing film. The propeller shaft push-pull rod moves linearly along the hollow propeller shaft, the incomplete gear is meshed with the straight rack, the paddle rotates, the synchronous belt drives the synchronous belt pulley and the vortex-eliminating wing wheel to synchronously rotate around the second rotating shaft in a direction opposite to that of the paddle, so that the vortex-eliminating wings fixed on the vortex-eliminating wing wheel are always parallel to the axis of the hollow propeller shaft, and the effect of weakening the propeller wake flow is achieved.
Description
Technical Field
The invention relates to a device for improving the propulsion efficiency of a propeller, in particular to variable-diameter marine propeller with a self-adaptive tip vortex eliminating device and a tip vortex eliminating method thereof.
Background
As the speed and the load of the propeller are increased, the propeller generates wake vortexes which are caused by the same propeller rotation direction when working, and research shows that the wake vortexes formed by the wake vortexes can take away energy accounting for 15-30% of the total propelling energy, so that the propelling efficiency of the propeller is greatly reduced.
The wing theory shows that the winglets arranged at the wing tips of the wings have the function of dispersing wing tip vortexes, pushing to the propellers, and the winglets arranged at the blade tips of the propellers can also achieve the functions, namely weakening or breaking the tail stream vortexes of the propellers, so that the propellers obtain better rectification effect, and the propulsion performance of the propellers is improved.
The invention patent with the application number of 201710529706.0 discloses reducing marine propellers, in order to adapt to various different working conditions in the working process of the propellers, a push-pull rod is driven to move axially along a ship shaft by a hydraulic reducing piston positioned in a power cabin of a ship, racks of the push-pull rod and incomplete gears are matched with each other to drive blades to rotate, and longitudinal and oblique angles of the blades are changed, so that the effective diameter of the propellers and the disc area of the propellers are changed, the continuous change of the thrust of the propellers is realized, and the purpose of efficient propulsion under different working conditions is achieved.
However, as the wingtips are directly formed by bending the blade tips of the blades, the fixed winglets cannot adaptively eliminate or break the tip vortexes corresponding to the variable-diameter marine propeller with the constantly changed longitudinal and oblique angles of the blades, and on the contrary, the fixed winglets may generate resistance to the propeller, so that the propulsion efficiency of the propeller is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a variable diameter marine propeller with a self-adaptive tip vortex eliminating device and a tip vortex eliminating method thereof.
The technical scheme adopted by the invention is as follows:
the variable diameter marine propeller with the self-adaptive tip-eliminating vortex device comprises a paddle device with a vortex-eliminating wing and a fin self-adaptive angle adjusting device, wherein the paddle device with the vortex-eliminating wing comprises paddles, a vortex-eliminating wing wheel, a vortex-eliminating wing and a sealing film, the wing root of the vortex-eliminating wing is fixed on the vortex-eliminating wing wheel, the fin self-adaptive angle adjusting device comprises a propeller shaft push-pull rod, a straight-tooth rack, a paddle blade foot, a fixed belt wheel, a synchronous belt and a synchronous belt wheel, the propeller shaft push-pull rod is coaxially arranged in a hollow propeller shaft, n straight-tooth racks are fixedly arranged on the propeller shaft push-pull rod along the circumferential direction of the propeller shaft push-pull rod, n through holes are formed in the side wall of the hollow propeller shaft push-pull rod, the paddle foot comprises a sealing ball fixed on a and an incomplete gear, the ball center of the sealing ball is positioned on a straight line where the central axis of the incomplete gear push-pull rod is positioned, n blades are arranged in the circumferential direction of the propeller shaft push-pull rod, n through holes are arranged in the propeller shaft push-pull rod, n through holes of the propeller shaft push-pull rod, n through holes, n sealing ring shafts are arranged in the synchronous belt wheel, n sealing rings, the propeller shaft push-pull rod, n sealing rings are arranged in the synchronous sealing rings, the sealing rings are arranged in the synchronous shaft push-pull rod, n sealing rings, the synchronous shaft push-pull rod, n sealing rings are arranged in the synchronous shaft push-pull rod, n sealing rings, the synchronous sealing rings are arranged in the synchronous sealing rings, n sealing rings, the synchronous sealing rings are arranged in the synchronous sealing rings, the synchronous propeller shaft push-pull rod, the synchronous propeller shaft push-pull rod, n propeller shaft.
The ship shaft push rod is fixed with a hydraulic reducing piston in the ship power cabin.
The head and the tail of the hollow ship shaft are hermetically arranged.
The thickness of the edge of the via hole of the sealing film is larger than that of the rest part.
The wing root of the vortex-eliminating wing is thick, and the wing tail of the vortex-eliminating wing is thin.
The tip vortex eliminating method for the variable-diameter marine propeller with the self-adaptive tip vortex eliminating device comprises the following specific steps:
the ship shaft push rod in the hollow ship shaft driven by the hydraulic reducing piston in the ship power cabin makes axial linear motion along the hollow ship shaft, the incomplete gears of n blade feet are respectively meshed with n straight tooth racks on the ship shaft push rod, the incomplete gears of the n blade feet synchronously rotate, and the incomplete gears of the blade feet rotate for an angle α along with the movement of the straight tooth racks, so that the blade feet drive the ship shaft push rod to be fixed with the ship shaft push rodThe blades rotate synchronously at the same angle α, because the fixed belt wheel positioned in the blade foot keeps the hollow ship shaft still, when the blades rotate, the synchronous belt drives the synchronous belt wheel positioned at the blade tip of the blades and the vortex-eliminating wing wheel to synchronously rotate around the second rotating shaft in the opposite direction of the blades, and because the transmission ratio of the fixed belt wheel to the synchronous belt wheel is 1, the angle α of the reverse rotation of the synchronous belt wheel and the vortex-eliminating wing wheel is equal to αrThe angle α that is equal to the blade rotation angle, thus make the fixed anti-vortex wing on the anti-vortex wing wheel always keep parallel with the axis of the hollow ship shaft, no matter how far the ship shaft push-pull rod moves linearly along the axis of the hollow ship shaft and moves linearly towards the ship head or the ship tail, the anti-vortex wing always follows the propeller propulsion direction.
Compared with the prior art, the invention has the beneficial effects that:
the blade tip dissipation vortex wing can be adaptive to the change of the effective diameter of the variable-diameter marine propeller, so that when the effective diameter of the propeller is changed, the direction of the wing piece of the blade tip dissipation vortex wing can be always kept parallel to the propulsion direction of the propeller, the effect of dissipating the wake flow of the propeller (dissipating or breaking the tip wake vortex of the blade) can be achieved, the energy taken away by the wake flow is reduced, the purpose of improving the propulsion efficiency of the propeller is achieved, and energy is effectively saved.
Drawings
Fig. 1 is a schematic view of the overall structure of the propeller of the present invention.
Fig. 2 is a schematic structural diagram of a blade device with a deswirler wing and a wing self-adaptive angle adjusting device according to the present invention.
Fig. 3 is a perspective view of the structure of the device with the vortex elimination wings at the blade tip of the blade of the invention.
FIG. 4 is an assembled cross-sectional view of the blade foot, the spur rack and the propeller shaft push-pull rod at the blade root of the propeller blade of the present invention.
Fig. 5 is a schematic diagram of the structure of the propeller of the present invention.
Fig. 6(a) and 6(b) are schematic diagrams of the movement of the propeller of the present invention at the initial position and the linear movement distance L of the propeller shaft push rod, respectively.
In the figure: 1. a ship shaft push-pull rod; 2. a blade foot; 3. a paddle; 4. a fixed pulley; 5. a synchronous belt; 6. a composite pulley; 7. a vortex elimination wing; 8. a sealing film; 9. a hollow shaft; 10. a hub; 11. and fixing the bracket.
Detailed Description
The invention is further described with reference to the following figures.
The propeller comprises a variable-diameter marine propeller with a self-adaptive tip-eliminating vortex device, a synchronous wing blade device with a vortex-eliminating wing, a fin self-adaptive angle adjusting device, a propeller shaft with a vortex-eliminating wing, a vortex-eliminating wing 7 and a sealing film 8, wherein the variable-diameter marine propeller comprises a propeller blade device with a vortex-eliminating wing and a fin self-adaptive angle adjusting device, the propeller blade device with the vortex-eliminating wing comprises a blade 3, a vortex-eliminating wing wheel, a vortex-eliminating wing 7 and the sealing film 8, the wing root of the vortex-eliminating wing 7 is fixed on the vortex-eliminating wing wheel, the fin self-adaptive angle adjusting device comprises a propeller shaft push-pull rod 1, a straight tooth rack, a blade foot 2, a fixed pulley 4, a synchronous belt 5 and a synchronous pulley, the propeller shaft push-pull rod 1 is fixed with a hydraulic variable-diameter piston in a marine power cabin and coaxially arranged in a hollow propeller shaft 639, the head and the tail of the hollow propeller shaft 9 are hermetically arranged, the propeller hub 10 is fixedly connected with the tail, n straight tooth racks are fixed on the propeller shaft push-pull rod 1, n straight tooth racks which are circumferentially distributed along the propeller shaft push-pull rod, n sealing film push rod is fixed with the propeller shaft push rod, n sealing film rack, n sealing film strips are fixed with the sealing film, n sealing film strips, n sealing film sealing rings are arranged in the sealing ring 2, n sealing rings are arranged in the sealing ring push rod 2, n sealing rings are arranged in the sealing rings, n sealing rings are arranged in the sealing rings of the sealing wing ball push rod 2, n sealing rings are arranged in the sealing rings, n sealing rings are arranged in the sealing rings, n sealing rings are arranged in the sealing rings, n sealing rings of the sealing rings, n sealing rings are arranged in the sealing rings of the sealing rings, n sealing rings of the sealing rings, n sealing rings are arranged in the sealing rings, n sealing.
As shown in fig. 5, 6(a) and 6(b), the tip vortex eliminating method for the variable diameter marine propeller with the adaptive tip vortex eliminating device specifically comprises the following steps:
when a hydraulic reducing piston in a ship power cabin drives a ship shaft push-pull rod 1 in an empty ship shaft 9 to do axial linear motion distance L along the empty ship shaft, incomplete gears of n blade feet 2 are respectively meshed with n straight tooth racks on the ship shaft push-pull rod 1, the incomplete gears of the n blade feet 2 synchronously rotate, the incomplete gears of the blade feet 2 move along with the straight tooth racks to rotate for an angle α, the blade feet 2 drive blades 3 fixed with the blade feet 2 to synchronously rotate for the same angle α, as a fixed belt pulley 4 positioned in the blade feet 2 keeps the empty ship shaft 9 still, when the blades 3 rotate, a synchronous belt 5 drives a synchronous belt pulley positioned at blade tips and a de-winging turbine to synchronously rotate around a second rotating shaft in the opposite direction of the blades 3, and as the transmission ratio of the fixed belt pulley 4 to the synchronous belt pulley is 1,thus the angle α of counter rotation of the synchronous pulley and the de-turborThe rotating angle α of the blade 3 is equal, so that the fixed vortex elimination wing 7 on the vortex elimination wing wheel is always parallel to the axis of the hollow ship shaft 9 (namely, the propeller shaft), and the vortex elimination wing 7 always moves along the propeller propelling direction no matter how much the ship shaft push pull rod 1 moves linearly along the axial direction of the hollow ship shaft and moves linearly towards the ship head or the ship tail, thereby achieving the purposes of effectively eliminating tip vortexes and improving the propeller propelling efficiency.
Claims (6)
1. The variable diameter marine propeller with the self-adaptive tip eliminating vortex device comprises a paddle device with a vortex eliminating wing, and is characterized by further comprising a fin self-adaptive angle adjusting device, wherein the paddle device with the vortex eliminating wing comprises paddles, a vortex eliminating wing wheel, a vortex eliminating wing and a sealing film, the wing root of the vortex eliminating wing is fixed on the vortex eliminating wing wheel, the fin self-adaptive angle adjusting device comprises a propeller shaft push-pull rod, a straight tooth rack, a paddle blade foot, a fixed belt wheel, a synchronous belt and a synchronous belt wheel, the propeller shaft push-pull rod is coaxially arranged in a hollow propeller shaft, n straight tooth racks uniformly distributed along the circumference of the propeller shaft push-pull rod are fixed on the propeller shaft push-pull rod, n is 3 or 4, the arrangement direction of the straight tooth racks is parallel to the arrangement direction of the propeller shaft push-pull rod, n through holes uniformly distributed along the circumference of the propeller shaft push-pull rod are formed in the side wall of the hollow propeller shaft push-pull rod, the paddle foot comprises n sealing wing feet including a ball fixed on a sealing wing ball and an incomplete sealing blade, the sealing wing, the.
2. The variable diameter marine propeller with the adaptive tip vortex removal device according to claim 1, wherein: the ship shaft push rod is fixed with a hydraulic reducing piston in the ship power cabin.
3. The variable diameter marine propeller with the adaptive tip vortex removal device according to claim 1, wherein: the head and the tail of the hollow ship shaft are hermetically arranged.
4. The variable diameter marine propeller with the adaptive tip vortex removal device according to claim 1, wherein: the thickness of the edge of the via hole of the sealing film is larger than that of the rest part.
5. The variable diameter marine propeller with the adaptive tip vortex removal device according to claim 1, wherein: the wing root of the vortex-eliminating wing is thick, and the wing tail of the vortex-eliminating wing is thin.
6. The method for eliminating the tip vortex of the variable diameter marine propeller with the self-adaptive tip vortex eliminating device according to any one of claims 1 to 5, which is characterized by comprising the following steps of:
a hydraulic reducing piston in a ship power cabin drives a ship shaft push rod in an hollow ship shaft to do axial linear motion along the hollow ship shaft, incomplete gears of n blade feet are respectively meshed with n straight tooth racks on the ship shaft push rod, the incomplete gears of the n blade feet synchronously rotate, the incomplete gears of the blade feet are arranged to rotate for an angle α along with the movement of the straight tooth racks, the blade feet drive blades fixed with the incomplete gears to synchronously rotate for the same angle α, a fixed belt wheel positioned in the blade feet keeps the hollow ship shaft immovable, a synchronous belt drives a synchronous belt wheel positioned at blade tips and a de-swirl wheel to synchronously rotate around a second rotating shaft in the opposite direction of the blades when the blades rotate, and the transmission ratio of the fixed belt wheel to the synchronous belt wheel is 1, so that the synchronous belt wheel and the de-swirl wheel rotate in opposite directions by an angle αrThe angle α that is equal to the blade rotation angle, thus make the fixed anti-vortex wing on the anti-vortex wing wheel always keep parallel with the axis of the hollow ship shaft, no matter how far the ship shaft push-pull rod moves linearly along the axis of the hollow ship shaft and moves linearly towards the ship head or the ship tail, the anti-vortex wing always follows the propeller propulsion direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911000194.4A CN110733622A (en) | 2019-10-21 | 2019-10-21 | Variable-diameter marine propeller with self-adaptive tip vortex eliminating device and tip vortex eliminating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911000194.4A CN110733622A (en) | 2019-10-21 | 2019-10-21 | Variable-diameter marine propeller with self-adaptive tip vortex eliminating device and tip vortex eliminating method thereof |
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| CN110733622A true CN110733622A (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911000194.4A Pending CN110733622A (en) | 2019-10-21 | 2019-10-21 | Variable-diameter marine propeller with self-adaptive tip vortex eliminating device and tip vortex eliminating method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360750A (en) * | 2020-10-23 | 2021-02-12 | 中国船舶科学研究中心 | Tip clearance vortex eliminating device |
| CN113090484A (en) * | 2021-03-30 | 2021-07-09 | 电子科技大学 | Thrust adjusting device of helicon wave plasma electric thruster |
-
2019
- 2019-10-21 CN CN201911000194.4A patent/CN110733622A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360750A (en) * | 2020-10-23 | 2021-02-12 | 中国船舶科学研究中心 | Tip clearance vortex eliminating device |
| CN113090484A (en) * | 2021-03-30 | 2021-07-09 | 电子科技大学 | Thrust adjusting device of helicon wave plasma electric thruster |
| CN113090484B (en) * | 2021-03-30 | 2022-02-01 | 电子科技大学 | Thrust adjusting device of helicon wave plasma electric thruster |
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