CN115140283B

CN115140283B - Ventilation device and ventilation method for semi-submerged low-speed propulsion

Info

Publication number: CN115140283B
Application number: CN202210797707.4A
Authority: CN
Inventors: 董良雄; 干鑫华; 江伟; 刘键; 王佳蕾
Original assignee: Zhoushan Shengshun Shipbuilding Co ltd; Zhejiang Ocean University ZJOU
Current assignee: Zhoushan Shengshun Shipbuilding Co ltd; Zhejiang Ocean University ZJOU
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2023-06-20
Anticipated expiration: 2042-07-08
Also published as: CN115140283A

Abstract

The invention discloses a ventilation device and a ventilation method for low-speed propulsion of a semi-immersed propeller, and belongs to the technical field of semi-immersed propeller driving, wherein the device comprises a propeller shaft, a propeller hub, paddles, an inner ventilation channel and an outer ventilation pipe; the device sets up the through-hole on the paddle, and the outer breather pipe of inside joint, the round head that ventilates on the outer breather pipe is rotatable to be adjusted, and when half soaking oar low-speed impels, adjustable round head direction of ventilating, thrust increases when reducing moment of torsion, and does not produce additional resistance, effectively reduces the energy consumption, and this ventilation method is simple easy to operate simultaneously.

Description

Ventilation device and ventilation method for semi-submerged low-speed propulsion

Technical Field

The invention belongs to the technical field of semi-submerged propeller driving, and particularly relates to a ventilation device and a ventilation method for low-speed propulsion of a semi-submerged propeller.

Background

The semi-submerged paddles have low efficiency at low speeds and produce less thrust. At this point, it is necessary to increase the immersion of the semi-submerged paddles in order to generate sufficient thrust to push the boat past the drag peak. However, the increase of the immersion depth of the semi-immersed paddle inevitably causes the increase of torque, and the ventilation device is adopted to ventilate the semi-immersed paddle at the moment so as to reduce the torque and simultaneously not cause the great reduction of thrust. However, a general ventilation device is positioned outside the semi-submerged paddle, the ventilation direction cannot be changed, the ventilation device is arranged in parallel to the paddle axis direction, and additional resistance is generated during ventilation.

Disclosure of Invention

The invention aims to provide a ventilation device and a ventilation method for low-speed propulsion of a semi-submerged propeller, wherein through holes are formed in a propeller blade, an outer ventilation pipe is clamped in the device, a ventilation round head on the outer ventilation pipe can be rotatably adjusted, the direction of the ventilation round head can be adjusted when the semi-submerged propeller is propelled at a low speed, the torque is reduced, the thrust is increased, no additional resistance is generated, and the energy consumption is effectively reduced.

In order to achieve the above purpose, the present invention provides the following technical solutions: the ventilation device comprises a propeller shaft, a propeller hub and paddles, wherein an outer sleeve is arranged outside the propeller shaft, the outer sleeve is arranged on a ship body, the propeller shaft is coaxially and rotatably connected inside the outer sleeve, one end of the propeller shaft extends out of the outer sleeve and is fixedly connected with the propeller hub, the paddles are arranged on a propeller hub, a plurality of through holes are formed in the paddles, the inside of each through hole is fixedly connected with an outer ventilation pipe in a clamping mode, an inner ventilation channel is formed between the outer sleeve and the propeller shaft and is communicated with the outer ventilation pipe, a ventilation round head is connected to the outer ventilation pipe and is arranged on the ventilation round head, and the ventilation round head can rotate along the outer ventilation pipe.

Preferably, the side of the outer sleeve is provided with a through groove, the through groove is provided with a plurality of through grooves along the circumferential direction of the outer sleeve, the outer sleeve on the outer side of the through groove is rotationally connected with a sleeve, an annular groove is arranged in the sleeve, and the outer vent pipe is communicated with the annular groove in the sleeve.

Preferably, the sleeve pipe is kept away from outer breather pipe side and is fixed with annular fixed plate, and annular fixed plate is fixed with the montant towards outer tube side, and the montant is kept away from annular fixed plate end rotation and is connected with the pulley, and the tread of pulley contacts with the lateral wall of outer tube, and the montant is equipped with a plurality of along annular fixed plate circumferencial direction.

Preferably, the outer breather pipe is provided with a rotating sleeve in an external rotating mode, a plurality of through holes are formed in the rotating sleeve, the plurality of outer breather pipes correspond to the plurality of through holes one by one, and the outer breather pipes are arranged in the corresponding through holes in a penetrating mode.

Preferably, the outer breather pipe is fixed with first shrouding towards the round end of ventilating, and first shrouding is inside to be seted up and runs through the groove, the round end of ventilating is fixed with the connecting pipe towards the pipe end of ventilating outward, and the connecting pipe passes and runs through the groove and extend to the outer breather pipe inside, is equipped with the second shrouding in the outer breather pipe, and the air vent has been seted up to the second shrouding inside, and the connecting pipe is fixed with flexible rubber tube towards second shrouding end, and the air vent is linked together with flexible rubber tube.

Preferably, the connecting springs are fixed on the inner wall of the through groove, a plurality of connecting springs are arranged along the circumferential direction of the through groove, and the connecting springs are fixed on the side wall of the connecting pipe far away from the end of the through groove.

Preferably, the second sealing plate is horizontally and rotatably connected with two rotating shafts, the two rotating shafts are symmetrically arranged about the center of the air guide hole, the rotating shafts are fixed with cams towards the first sealing plate end, when the cams rotate for one circle, at least one position exists, the cams are contacted with the connecting pipe, and a driving structure capable of simultaneously driving the two cams to rotate is arranged in the outer vent pipe.

Preferably, the driving structure includes:

the gear ring is coaxially and rotatably arranged in the outer vent pipe;

the two second gears are respectively fixedly arranged at the right end of the rotating shaft extending out of the second sealing plate, and are both in meshed connection with the gear ring;

the motor is fixedly arranged in the outer vent pipe, a first gear is fixedly arranged on an output shaft of the motor, and the first gear is in meshed connection with the gear ring.

The application also discloses a semi-submerged oar low-speed propulsion uses ventilation method, adopts foretell ventilation unit, includes following step:

(1) air introduced by the inner air passage is sprayed out from the air holes of the ventilation round head through the outer air passage, and the ventilation round head rotates in any direction in the through hole to change the inclination angle of the air holes and the blades;

(2) when the semi-immersed paddle is at a normal speed, the ventilation round head is inserted into the through hole on the paddle through the outer ventilation pipe, and at the moment, the air hole on the ventilation round head is in a horizontal state;

(3) when the semi-immersed paddle is at a low speed, the thrust of the semi-immersed paddle is reduced, at the moment, the ventilation round head is rotated to enable the ventilation round head to be rotated to be in an acute angle state with the paddle, in the rotation process of the paddle, an oblique flow angle is formed along with the ventilation, when the oblique flow angle exists, the immersion depth of the semi-immersed paddle is increased, the thrust is increased, and the outer ventilation pipe is continuously ventilated, so that the torque is reduced;

(4) and after the low-speed running is finished, the ventilation round head is readjusted to enable the air hole to rotate to be in a horizontal state, and normal running is kept.

The beneficial effects of the invention are as follows:

1. the device sets up the through-hole on the paddle, and the outer breather pipe of inside joint, the round head that ventilates on the outer breather pipe is rotatable to be adjusted, and when half soaking oar low-speed impels, adjustable round head direction of ventilating, thrust increases when reducing the moment of torsion, and does not produce additional resistance, effectively reduces the energy consumption.

2. The outer sleeve is rotatably provided with a sleeve, one side of the sleeve is provided with an annular fixing plate, and meanwhile, a pulley is arranged below the annular fixing plate, so that the sleeve can rotate along with the blade quickly, and ventilation normal operation is guaranteed.

3. The motor drives two cams to reversely rotate through the first gear, the gear ring and the second gear, and the cams continuously stir the connecting pipe to rotate 360 degrees in all directions, so that the motor can be adjusted to different angles when the semi-immersed paddles have different speeds, and the motor can be suitable for thrust conditions of the semi-immersed paddles at different speeds.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic diagram of the structure of the present invention;

FIG. 3 is a cross-sectional view at A-A in FIG. 2;

FIG. 4 is an enlarged schematic view at B in FIG. 3;

FIG. 5 is an enlarged schematic view at C in FIG. 3;

FIG. 6 is a schematic view of the structure of the vent button;

FIG. 7 is a cross-sectional view at D-D in FIG. 6;

FIG. 8 is a cross-sectional view taken at E-E of FIG. 7;

FIG. 9 is a cross-sectional view taken at F-F in FIG. 7;

fig. 10 is a cross-sectional view at G-G in fig. 7.

In the figure: 1. a pulp shaft; 2. a hub; 3. a paddle; 4. an inner airway; 5. an outer vent pipe; 6. a through hole; 7. a ventilation round head; 8. a through groove; 9. a sleeve; 10. an annular fixing plate; 11. a vertical rod; 12. a pulley; 13. rotating the sleeve; 14. a first sealing plate; 15. a second sealing plate; 16. a through groove; 17. a connecting pipe; 18. a flexible rubber tube; 19. an air guide hole; 20. a connecting spring; 21. a rotating shaft; 22. a cam; 23. a motor; 24. an outer sleeve; 25. perforating; 26. an annular groove; 27. a first gear; 28. a gear ring; 29. a second gear; 30. and (5) air holes.

Detailed Description

For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings.

Referring to fig. 1 to 10, a ventilation device and a ventilation method for low-speed propulsion of a semi-submerged propeller according to an embodiment of the present invention will be described in detail.

As shown in fig. 1, the ventilation device for low-speed propulsion of semi-submerged paddles comprises a paddle shaft 1, a paddle hub 2 and paddles 3, wherein an outer sleeve 24 is arranged outside the paddle shaft 1, the outer sleeve 24 is installed on a ship body, the paddle shaft 1 is coaxially and rotatably connected inside the outer sleeve 24, one end of the paddle shaft 1 extends out of the outer sleeve 24 and is fixedly connected with the paddle hub 2, the paddles 3 are arranged on the paddle hub 2, a plurality of through holes 6 are formed in the paddles 3, the inside of the through holes 6 are fixedly connected with an outer ventilation pipe 5 in a clamping manner, an inner ventilation pipe 4 is formed between the outer sleeve 24 and the paddle shaft 1, the inner ventilation pipe 4 is communicated with the outer ventilation pipe 5, an outer ventilation pipe 5 is connected with a ventilation round head 7 at the position of the through holes 6, an air hole 30 communicated with the outer ventilation round head 7 can rotate along the outer ventilation pipe 5.

In this embodiment, firstly set up through-hole 6 on paddle 3, the outside breather pipe 5 of the inside joint of through-hole 6 sets up outer tube 24 in the outside of paddle axle 1, be formed with interior air duct 4 between outer tube 24 and the paddle axle 1, gas gets into along interior air duct 4, spout in the gas pocket 30 of round head 7 of ventilating through outer breather pipe 5, when half soaking oar promotes at a low speed, can change the direction of ventilation, change the immersion of half soaking oar, adjust the thrust increase, reduce the moment of torsion simultaneously, and the round head 6 of ventilating that sets up can freely change the angle of ventilating, can assist half soaking oar promotion when not increasing additional resistance.

Specifically, on the vent line, through having seted up logical groove 8 in outer tube 24 side, logical groove 8 is equipped with a plurality of along outer tube 24 circumferencial direction, outer tube 24 outside rotates and is connected with sleeve pipe 9, be equipped with ring channel 26 in the sleeve pipe 9, the one end of outer breather pipe 5 is linked together with ring channel 26 in the sleeve pipe 9, outer breather pipe 5 is fixed with first shrouding 14 towards ventilating button head 7 end, outer breather pipe 5 internal fixation has second shrouding 15, first shrouding 14 is inside to be seted up and is run through groove 16, ventilating button head 7 is fixed with connecting pipe 17 towards outer breather pipe 5 end, connecting pipe 17 passes and runs through groove 16 and extend to outer breather pipe 5 inside, air guide hole 19 has been seted up to second shrouding 15 inside, connecting pipe 17 is fixed with flexible rubber tube 18 towards second shrouding 15 end, air guide hole 19 and flexible rubber tube 18 inside intercommunication.

The gas is led along the inner ventilation tube 24 into the annular groove 26 of the sleeve 9 through the through groove 8 and then along the respective outer ventilation tube 5 into the ventilation dome 7.

The outside rotation of outer tube 24 is provided with rotation sleeve 13, is equipped with a plurality of perforation 25 on the rotation sleeve 13, and a plurality of outer breather pipe 5 and a plurality of perforation 25 one-to-one, outer breather pipe 5 wears to establish in corresponding perforation 25, and rotation sleeve 13 plays fixed limiting displacement to outer breather pipe 5, guarantees the stability when rotating, avoids intertwine between the outer breather pipe 5.

When the blade rotates, the sleeve 9 is connected to the outside of the outer sleeve 24 in a rotating way, and when the blade 3 drives the outer vent pipe 5 to rotate, the sleeve 9 rotates along with the outer vent pipe, so that ventilation can be performed without being hindered.

Specifically, the sleeve pipe 9 is kept away from outer breather pipe 5 side and is fixed with annular fixed plate 10, and annular fixed plate 10 is fixed with montant 11 towards outer tube 24 side, and annular fixed plate 10 end rotation is kept away from to montant 11 is connected with pulley 12, and montant 11 is equipped with a plurality of along annular fixed plate 10 circumferencial direction.

When the blade 3 rotates, the pulley 12 contacted with the outer wall of the outer sleeve 24 can rotate to drive the sleeve 9 to rotate.

Specifically, when adjusting the direction of the ventilation round head 7, the specific structure is: the connecting springs 20 are fixed on the inner wall of the through groove 16, the connecting springs 20 are arranged in a plurality of along the circumferential direction of the through groove 16, the connecting springs 20 are fixed on the side wall of the connecting pipe 17 far away from the end of the through groove 16, the second sealing plate 15 is horizontally and rotationally connected with two rotating shafts 21, the two rotating shafts 21 are arranged in a central symmetry mode relative to the air guide holes 19, the rotating shafts 21 are fixed with cams 22 towards the end of the first sealing plate 14, the other ends extend to the right side of the second sealing plate 15, second gears 29 are arranged at the end portions of the second sealing plate, gear rings 28 are coaxially arranged in the outer ventilation pipe 5 in a rotating mode, the two second gears 29 are connected with the gear rings 28 in a meshed mode, a motor 23 is arranged in the outer ventilation pipe 5, a first gear 27 is fixedly arranged on an output shaft of the motor 23, and the first gear 27 is connected with the gear rings 28 in a meshed mode.

The motor 23 is started to drive the first gear 27 to rotate, and the gear ring 28 drives the two second gears 29 to rotate, so that the two cams 22 are driven to rotate reversely, when the two cams 22 rotate reversely, the top points of the two cams do not simultaneously collide with the surface of the connecting pipe 17, the 360-degree omnibearing rotation of the connecting pipe 17 up, down, left and right can be ensured, when the cam 22 drives the inner end of the connecting pipe 17 to rotate downwards, the rotating shaft 21 and the paddles 3 are in an acute angle state, an oblique flow angle can be formed, and then the paddles 3 can be assisted to improve thrust when ventilation is performed, meanwhile, torque is reduced, and energy consumption is reduced.

By adopting the semi-immersed paddle ventilation device, the ventilation position is regulated by pushing the semi-immersed paddle at different speeds, and the ventilation method is used for pushing the semi-immersed paddle at normal speed and low speed, and is realized by the following steps:

(1) the air introduced by the inner air passage 4 is sprayed out from the air holes 30 of the ventilation round head 7 through the outer air passage 5, and the ventilation round head 7 rotates in any direction in the through hole 6 to change the inclination angle of the air holes 30 and the blades 3;

(2) when the semi-immersed paddle is at a normal speed, the ventilation round head 7 is inserted into the through hole 6 on the paddle 3 through the outer ventilation pipe 5, and at the moment, the air hole 30 on the ventilation round head 7 is in a horizontal state;

(3) when the semi-immersed paddle is at a low speed, the thrust of the semi-immersed paddle is reduced, at the moment, the ventilation round head 7 is rotated to be in an acute angle state with the blade 3, in the rotation process of the blade 3, an oblique flow angle is formed along with the ventilation, when the oblique flow angle exists, the immersion depth of the semi-immersed paddle is increased, the thrust is increased, the outer ventilation pipe 5 is continuously ventilated, and the torque is reduced;

(4) after the low-speed running is finished, the ventilation round head 7 is readjusted, so that the air hole 30 rotates to be in a horizontal state, and normal running is maintained.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The ventilation device for the semi-submerged low-speed propulsion is characterized by comprising a paddle shaft (1), a paddle hub (2) and paddles (3), wherein an outer sleeve (24) is arranged outside the paddle shaft (1), the outer sleeve (24) is installed on a ship body, the paddle shaft (1) is coaxially connected inside the outer sleeve (24) in a rotating mode, one end of the paddle shaft (1) extends out of the outer sleeve (24) and is fixedly connected with the paddle hub (2), the paddles (3) are arranged on the paddle hub (2), a plurality of through holes (6) are formed in the paddles (3), an outer ventilation pipe (5) is clamped in the inner portions of the through holes (6), an inner ventilation channel (4) is formed between the outer sleeve (24) and the paddle shaft (1), the inner ventilation channel (4) is communicated with the outer ventilation pipe (5), ventilation round heads (7) are connected at the through holes (6), and air holes (30) communicated with the outer ventilation pipe (5) are formed in the ventilation round heads (7) and can rotate along the outer ventilation pipe (5);

the outer vent pipe (5) is fixedly provided with a first sealing plate (14) towards the end of the vent round head (7), a penetrating groove (16) is formed in the first sealing plate (14), the vent round head (7) is fixedly provided with a connecting pipe (17) towards the end of the outer vent pipe (5), the connecting pipe (17) penetrates through the penetrating groove (16) to extend into the outer vent pipe (5), a second sealing plate (15) is arranged in the outer vent pipe (5), an air guide hole (19) is formed in the second sealing plate (15), a telescopic rubber pipe (18) is fixedly arranged towards the end of the second sealing plate (15), and the air guide hole (19) is communicated with the telescopic rubber pipe (18);

connecting springs (20) are fixed on the inner wall of the through groove (16), a plurality of connecting springs (20) are arranged along the circumferential direction of the through groove (16), and the ends, away from the through groove (16), of the connecting springs (20) are fixed on the side wall of the connecting pipe (17);

two rotating shafts (21) are horizontally and rotatably connected to the second sealing plate (15), the two rotating shafts (21) are symmetrically arranged about the center of the air guide hole (19), the rotating shafts (21) are fixedly provided with cams (22) towards the end of the first sealing plate (14), when the cams (22) rotate for one circle, at least one position exists, the cams (22) are contacted with the connecting pipe (17), and a driving structure capable of simultaneously driving the two cams (22) to rotate is arranged in the outer ventilation pipe (5);

the driving structure includes:

the gear ring (28) is coaxially and rotatably arranged in the outer vent pipe (5);

the two second gears (29) are respectively and fixedly arranged at the right ends of the rotating shafts (21) extending out of the second sealing plates (15), and the two second gears (29) are in meshed connection with the gear rings (28);

the motor (23), motor (23) set firmly in outer breather pipe (5), set firmly first gear (27) on the output shaft of motor (23), first gear (27) and ring gear (28) meshing are connected.

2. The ventilation device for low-speed propulsion of semi-submerged paddles according to claim 1, characterized in that the side surface of the outer sleeve (24) is provided with a plurality of through grooves (8), the through grooves (8) are arranged along the circumferential direction of the outer sleeve (24), the outer sleeve (24) outside the through grooves (8) is rotatably connected with a sleeve (9), an annular groove (26) is arranged in the sleeve (9), and the outer ventilation pipe (5) is communicated with the annular groove (26) in the sleeve (9).

3. The ventilation device for low-speed propulsion of semi-submerged paddles according to claim 2, characterized in that an annular fixing plate (10) is fixed on the side, away from the outer ventilation pipe (5), of the sleeve (9), a vertical rod (11) is fixed on the side, facing the outer sleeve (24), of the annular fixing plate (10), a pulley (12) is rotatably connected to the end, away from the annular fixing plate (10), of the vertical rod (11), the pulley surface of the pulley (12) is in contact with the side wall of the outer sleeve (24), and a plurality of vertical rods (11) are arranged along the circumferential direction of the annular fixing plate (10).

4. The ventilation device for low-speed propulsion of semi-submerged paddles according to claim 1, wherein a rotating sleeve (13) is rotatably arranged outside the outer ventilation tube (5), a plurality of through holes (25) are formed in the rotating sleeve (13), the plurality of outer ventilation tubes (5) are in one-to-one correspondence with the plurality of through holes (25), and the outer ventilation tubes (5) are arranged in the corresponding through holes (25) in a penetrating mode.

5. A method for ventilating a semi-submerged propeller with a ventilating device for low-speed propulsion, which adopts the ventilating device as set forth in claim 1, comprising the steps of:

(1) air introduced by the inner air passage (4) is sprayed out of the air holes (30) of the ventilation round head (7) through the outer air passage (5), and the ventilation round head (7) rotates in any direction in the through hole (6) to change the inclination angle of the air holes (30) and the blades (3);

(2) when the semi-immersed paddle is at a normal speed, the ventilation round head (7) is inserted into the through hole (6) on the paddle (3) through the outer ventilation pipe (5), and at the moment, the air hole (30) on the ventilation round head (7) is in a horizontal state;

(3) when the semi-immersed paddle is at a low speed, the thrust of the semi-immersed paddle is reduced, at the moment, the ventilation round head (7) is rotated to form an acute angle with the paddle (3), in the rotation process of the paddle (3), an oblique flow angle is formed along with the ventilation, when the oblique flow angle exists, the immersion depth of the semi-immersed paddle is increased, the thrust is increased, the outer ventilation pipe (5) is continuously ventilated, and the torque is reduced;

(4) and after the low-speed running is finished, the ventilation round head (7) is readjusted, so that the air hole (30) rotates to be in a horizontal state, and the normal running is kept.