A drogue based on a ship's suspended rudder

Abstract

This invention relates to the field of marine technology, specifically to a squeegee based on a ship's suspended rudder. It includes: a support tube fixedly mounted at the bottom of a propeller shaft; a vertically movable support shaft movably mounted on the inner wall of the support tube; and a buffer assembly at the bottom of the support shaft. The buffer assembly includes a piston ring, a first movable tube, a second movable tube, a first fixed ring, and a second fixed ring, with the piston ring fixedly connected to the bottom of the support shaft. This invention utilizes the fact that the reciprocating damping fluid flowing through the first fixed ring, the second fixed ring, the retaining ring, and the Tesla valve flow channel formed between the guide plate and the guide tube is obstructed, thus damping the vertical movement of the piston ring. Furthermore, when the vertical movement is frequent, the guide tube expands, increasing the resistance of the Tesla valve flow channel, thereby achieving adaptive damping adjustment according to different needs.

Description

Technical Field

[0001] This invention relates to the field of marine technology, specifically to a buoyancy stopper based on a ship's suspended rudder. Background Technology

[0002] During navigation, the rudder stock of a ship will bounce slightly upwards along with the rudder blade due to the influence of water currents and waves. During this process, the repeated impact between the rudder stock and the upper rudder bearing will accelerate wear, and may even cause seal failure and structural deformation. In severe cases, it may cause the rudder blade to detach, resulting in a rudder loss accident.

[0003] For example, CN215972066U discloses a ship upper rudder bearing anti-slip device applied in the field of marine technology. The device includes an anti-slip ring, which comprises an anti-slip ring assembly I and an anti-slip ring assembly II. The anti-slip ring assembly I has a semi-circular snap-fit ​​part I, and the anti-slip ring assembly II has a semi-circular snap-fit ​​part II. The anti-slip ring assembly I and the anti-slip ring assembly II are connected by a bolt and nut assembly. The anti-slip ring is fitted onto the rudder stock, with one end face abutting against one end face of a raceway. This ship upper rudder bearing anti-slip device has a simple structure, low cost, and can effectively prevent the raceway of the roller rudder bearing from slipping out during ship navigation, thus improving ship safety. For example, the container ship fully suspended rudder system provided in announcement number CN220391510U includes a rudder gear, rudder stock, rudder sleeve, and rudder blade. The rudder sleeve is welded to the stern structure of the hull. An upper rudder bearing is installed on the top of the rudder sleeve, which is fixedly connected to the hull and seals the top surface of the rudder sleeve. The rudder stock passes through the upper rudder bearing, which rotates to support the rudder stock and seals it. A lower rudder bearing is installed at the bottom inside the rudder sleeve, which rotates to support the rudder stock. A rudder ball is welded to the middle of the rudder blade facing the bow. The rudder ball is coaxial with and close to the propeller. The main body of the rudder blade consists of two symmetrical smooth curved surfaces, which can effectively reduce the low-pressure area, avoid the generation of cavitation, and reduce corrosion damage to the rudder blade surface.

[0004] However, in actual use, the above-mentioned technologies use welded and fixed round steel or iron blocks to achieve the anti-jump function, which has poor buffering effect and cannot adaptively adjust the buffering force according to the vibration frequency, thus failing to meet the adaptive damping adjustment requirements of ships at different speeds and wave heights. Summary of the Invention

[0005] The purpose of this invention is to provide a shock absorber based on a ship's suspended rudder, in order to solve the problem that the buffering force cannot be adaptively adjusted according to the vibration frequency, and the adaptive damping adjustment requirements of ships at different speeds and wave heights cannot be met.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bleed stopper based on a ship's suspension rudder, comprising: A support tube is fixedly installed at the bottom of the propeller shaft, and a vertically movable support shaft is movably provided on the inner wall of the support tube. A buffer assembly is provided at the bottom of the support shaft. The buffer assembly includes a piston ring, a first movable tube, a second movable tube, a first fixed ring, and a second fixed ring. The piston ring is fixedly connected to the bottom of the support shaft so that the support shaft drives the piston ring to move up and down between the first fixed ring and the second fixed ring. A damping assembly is provided between the first fixed ring and the second fixed ring. The damping assembly includes a fixed inner ring movably connected to the surface of the piston ring. A fixed frame is fixedly connected to the surface of the fixed inner ring. A fixed outer ring is fixedly embedded in the middle of the side wall of the fixed frame away from the fixed inner ring. A first partition and a second partition are fixedly connected radially in sequence in the middle of the fixed frame. Multiple guide plates and guide tubes are fixedly connected in the middle of the first and second partitions, forming a Tesla valve flow channel. The guide plates have a symmetrical structure in the middle so that both ends of the Tesla valve flow channel are unidirectional. The guide tubes have a deformation function to change the resistance of the liquid passing through the Tesla valve flow channel. Damping fluid is provided inside the Tesla valve flow channel.

[0007] Preferably, the inner wall of the support tube is movably connected to a third movable tube that moves up and down, and the surface of the third movable tube is in close contact with the inner wall of the support tube. The third movable tube is fixedly connected to the top of the support shaft, and a return spring is fixedly connected to the bottom of the third movable tube, and the return spring is fixedly connected to the bottom of the inner wall of the support tube.

[0008] Preferably, the first movable tube and the second movable tube are fixedly connected to the top and bottom of the piston ring, respectively. The first movable tube is movably connected to the inner wall of the first fixed ring, and the second movable tube is movably connected to the inner wall of the second fixed ring. Sealing rings are fixedly connected to the surface of the piston ring and the inner walls of the first and second fixed rings to maintain a dynamic seal between the first movable tube and the first fixed ring, between the second movable tube and the second fixed ring, and between the piston ring and the fixed inner ring. Sealing bellows are fixedly connected between the top of the first movable tube and the top of the first fixed ring, and between the bottom of the second movable tube and the bottom of the second fixed ring to enhance the sealing between the first movable tube and the first fixed ring and between the second movable tube and the second fixed ring. Outer protective tubes are fixedly connected to the surfaces of the first and second fixed rings.

[0009] Preferably, a connecting pipe is fixedly connected to the top of the outer protective tube, a mounting bracket is fixedly connected to the top of the connecting pipe, an upper fixing plate is fixedly connected to the bottom of the mounting bracket, and the connecting pipe passes through and extends to both ends of the upper fixing plate. A mounting plate is fixedly connected to the top of the support tube, and the mounting plate is fixedly connected to the bottom of the propeller rod. Guide combs are fixedly connected to one end of the opposite face of the mounting bracket and the propeller rod to guide the relative movement of the mounting bracket and the propeller rod. A sealing flexible tube is fixedly connected between the mounting plate and the mounting bracket to seal the connection between the connecting pipe and the support tube. A reinforcing rib is fixedly connected to the bottom of the upper fixing plate, and a lower fixing plate is fixedly connected to the bottom of the reinforcing rib. Edge sealing strips are fixedly connected to both ends of the opposite face of the upper and lower fixing plates, and the propeller blades are fixedly connected to the front and rear ends of the edge sealing strips. A reinforcing plate is fixedly connected to the middle of the propeller blades, and the outer protective tube is fixedly connected to the top of the reinforcing plate.

[0010] Preferably, the surface of the support tube is fixedly connected with a plurality of first guide strips, and the inner wall of the connecting tube corresponding to the position of the first guide strips is fixedly connected with a plurality of second guide strips, and the first guide strips and the second guide strips are staggered. The first guide strips are provided with permanent magnets, and the permanent magnets in two adjacent first guide strips have opposite magnetic properties. The second guide strips are provided with coils, so that when the first guide strips and the second guide strips move alternately in the vertical direction, the coils in the second guide strips generate alternating current.

[0011] Preferably, the guide pipe is fixedly connected through and extends to both ends of the first and second partitions. The guide pipe contains heat transfer oil. A separator is fixedly connected to the surface of the middle part of the first partition, and the separator is fixedly connected to the inner wall of the fixed outer ring. The top and bottom of the first partition and the fixing frame are respectively fixedly connected to retaining rings, and the two retaining rings are respectively fixedly connected to one end of the opposite face of the first and second fixing rings, so that the damping fluid flowing out from the Tesla valve flow channel formed between the guide plate and the guide pipe only flows back and forth in the piston ring, the first fixing ring, the second fixing ring and the Tesla valve flow channel. The inner wall of the outer protective pipe corresponding to the retaining ring position is provided with a connecting groove, and the side wall of the outer protective pipe is fixedly embedded with a connecting component connecting the two connecting grooves, so that the inside of the top connecting groove, the inside of the multiple top guide pipes, the inside of the space formed by the surface of the fixed inner ring and the fixing frame, the inside of the multiple bottom guide pipes and the inside of the bottom connecting groove form a heat transfer oil circulation channel through the connecting component.

[0012] Preferably, the connecting component includes an electric heating tube, and the inner coil of the second guide bar is electrically connected to the electric heating tube so that the electric heating tube is heated by electricity. Both ends of the electric heating tube are respectively fixedly connected to a connecting tube, and the opposite ends of the two connecting tubes are respectively provided with one-way valves in opposite directions. The middle of the connecting tube is provided with a buffer hose.

[0013] Preferably, a rubber cover is fixedly connected to the top of the first movable tube, and the rubber cover is fixedly connected to the top of the first fixed ring. The sealing bellows has multiple through holes in the middle of the corresponding position inside the rubber cover, so that the volume inside the rubber cover changes when the first movable tube moves up and down. The through holes cooperate with the one-way valves and buffer hoses at both ends of the two connecting pipes to make the heat transfer oil inside the heat transfer oil circulation channel circulate. The guide pipe is a thermal expansion material component.

[0014] Preferably, an installation tube is provided between two adjacent first partitions, and an electromagnetic coil is provided on the surface of the installation tube, and the electromagnetic coil is directly electrically connected to the second guide strip that generates induced alternating current.

[0015] Preferably, the mounting tube is a metal component.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The present invention achieves the purpose of adaptively adjusting the damping fluid according to different needs by means of the damping fluid flowing through the first fixed ring, the second fixed ring, the baffle ring, and the Tesla valve flow channel formed between the guide plate and the guide tube. This damping fluid acts as a damping force on the up and down movement of the piston ring. When the up and down movement is frequent, the flow channel expands, increasing the resistance of the Tesla valve flow channel. This invention also fills the Tesla valve channel with a damping fluid of magnetorheological fluid. When the propeller blade is frequently bounced up and down by the waves, the induced current generated by the coil in the second guide bar will become larger and larger. This will make the magnetic field generated by the electromagnetic coil larger and larger, that is, the viscosity of the magnetorheological fluid will become higher and higher. This further improves the damping of the reciprocating flow of the magnetorheological fluid in the Tesla valve channel, that is, it hinders the up and down movement of the piston ring. This further hinders the up and down movement of the propeller blade when it is frequently bounced up and down by the waves, thus achieving the purpose of adaptively adjusting the damping according to different needs. This invention also utilizes a metal mounting tube. When the propeller blade is frequently subjected to the up-and-down movement of waves, the induced current generated by the coil inside the second guide bar increases, which in turn increases the magnetic field generated by the electromagnetic coil. Eddy currents are generated inside the mounting tube located within the alternating magnetic field of the electromagnetic coil, resulting in energy loss within the mounting tube and causing it to heat up. This heat is then transferred through the guide plate and heat transfer oil to the guide tube, which is then heated. The heated guide tube expands, increasing the resistance of the Tesla valve flow channel and further hindering the up-and-down movement of the piston ring. In other words, when the propeller blade is frequently subjected to the up-and-down movement of waves, the up-and-down movement of the propeller blade is further hindered, thus achieving the purpose of adaptively adjusting the damping according to different needs. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of a ship suspension rudder-based anti-jump device according to the present invention; Figure 2 This is a cross-sectional view of the overall structure of a ship suspension rudder-based anti-jump device according to the present invention; Figure 3 This is an exploded view of the overall structure of a ship suspension rudder-based anti-jump device according to the present invention; Figure 4 This is a partially exploded view of the structure of a shock absorber buffer assembly based on a ship's suspension rudder according to the present invention. Figure 5 This is a schematic diagram of a shock absorber buffer assembly based on a ship's suspension rudder according to the present invention. Figure 6 This is a cross-sectional view of a shock absorber buffer assembly based on a ship's suspension rudder according to the present invention. Figure 7 This is a cross-sectional view of a shock absorber damping assembly based on a ship's suspension rudder according to the present invention. Figure 8 This is a cross-sectional view of the outer protective tube structure of a ship suspension rudder based on the present invention. Figure 9 This is a schematic diagram of a shock absorber connection component based on a ship's suspension rudder according to the present invention. Figure 10 This is an exploded view of the structure of a shock absorber damping component based on a ship's suspension rudder according to the present invention. Figure 11 This is a partial exploded view of the structure of a shock absorber damping component based on a ship's suspension rudder according to the present invention.

[0018] In the diagram: 1. Support tube; 2. Support shaft; 301. Piston ring; 302. First movable tube; 303. Second movable tube; 304. Outer protective tube; 305. First fixed ring; 306. Second fixed ring; 307. Sealing bellows; 308. Third movable tube; 309. Return spring; 401. Fixed inner ring; 402. Fixing frame; 403. Fixed outer ring; 404. First partition; 405. Second partition; 406. Guide plate; 407. Guide pipe; 408. Separator strip; 409. Baffle ring; 410. Rubber cover; 411. Through hole; 412. Connecting groove; 413. Connecting assembly; 4131. Electric heating tube; 4132. Connecting pipe; 4133. Buffer hose; 414. Mounting pipe; 415. Electromagnetic coil; 5. Connecting pipe; 6. First guide strip; 7. Second guide strip; 8. Upper fixing plate; 9. Mounting bracket; 10. Mounting plate; 11. Paddle rod; 12. Sealing flexible tube; 13. Guide comb toothed strip; 14. Reinforcing rib; 15. Lower fixing plate; 16. Edge sealing strip; 17. Paddle blade; 18. Reinforcing plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-11 The present invention provides a technical solution: a squeegee based on a ship's suspension rudder, comprising: A support tube 1 is fixedly installed at the bottom of the paddle 11. The inner wall of the support tube 1 is movably provided with a support shaft 2 that moves vertically up and down. A buffer assembly is provided at the bottom of the support shaft 2. The buffer assembly includes a piston ring 301, a first movable tube 302, a second movable tube 303, a first fixed ring 305, and a second fixed ring 306. The piston ring 301 is fixedly installed at the bottom of the support shaft 2 so that the support shaft 2 drives the piston ring 301 to move up and down between the first fixed ring 305 and the second fixed ring 306. A damping assembly is provided between the first fixed ring 305 and the second fixed ring 306. The damping assembly includes a fixed inner ring 401 movably connected to the surface of the piston ring 301. A fixing bracket 402 is fixedly mounted on the surface of the fixed inner ring 401. A fixed outer ring 403 is fixedly embedded in the middle of the side wall of the fixing bracket 402 away from the fixed inner ring 401. A first partition 404 and a second partition 405 are radially fixedly mounted in sequence in the middle of the fixing bracket 402. Multiple guide plates 406 and guide pipes 407 are fixedly mounted in the middle of the first partition 404 and the second partition 405, forming a Tesla valve flow channel. The guide plates 406 have a symmetrical structure in the middle so that both ends of the Tesla valve flow channel are unidirectional. The guide pipes 407 have a deformation function to change the resistance of the liquid flowing through the Tesla valve flow channel. The Tesla valve flow channel is filled with damping fluid and support pipe 1. A third movable tube 308, which moves up and down, is movably connected to the inner wall of the support tube 1. The surface of the third movable tube 308 is tightly fitted to the inner wall of the support tube 1. The third movable tube 308 is fixedly installed on the top of the support shaft 2. A return spring 309 is fixedly installed at the bottom of the third movable tube 308, and the return spring 309 is fixedly installed at the bottom of the inner wall of the support tube 1. A first movable tube 302 and a second movable tube 303 are respectively fixedly installed on the top and bottom of the piston ring 301. The first movable tube 302 is movably connected to the inner wall of the first fixed ring 305, and the second movable tube 303 is movably connected to the inner wall of the second fixed ring 306. Sealing rings are fixedly installed on the surface of the piston ring 301 and on the inner walls of the first fixed ring 305 and the second fixed ring 306, so that the first movable tube 302 is movably connected to the inner wall of the first fixed ring 305 and the second fixed ring 306, respectively. A dynamic seal is maintained between the movable tube 302 and the first fixed ring 305, between the second movable tube 303 and the second fixed ring 306, and between the piston ring 301 and the fixed inner ring 401. Sealing bellows 307 are fixedly installed between the top of the first movable tube 302 and the top of the first fixed ring 305, and between the bottom of the second movable tube 303 and the bottom of the second fixed ring 306, respectively, to enhance the sealing performance between the first movable tube 302 and the first fixed ring 305, and between the second movable tube 303 and the second fixed ring 306. An outer protective tube 304 is fixedly installed on the surface of the first fixed ring 305 and the second fixed ring 306. A connecting tube 5 is fixedly installed on the top of the outer protective tube 304, and a mounting bracket 9 is fixedly installed on the top of the connecting tube 5. An upper fixing plate 8 is fixedly installed at the bottom of the mounting frame 9, and a connecting pipe 5 passes through and extends to both ends of the upper fixing plate 8. An mounting plate 10 is fixedly installed at the top of the support pipe 1. The mounting plate 10 is fixedly installed at the bottom of the propeller rod 11. Guide combs 13 are fixedly installed at one end of the opposite surfaces of the mounting frame 9 and the propeller rod 11 to guide the relative movement of the mounting frame 9 and the propeller rod 11. A sealing flexible pipe 12 is fixedly installed between the mounting plate 10 and the mounting frame 9 to seal the connection between the connecting pipe 5 and the support pipe 1. A reinforcing rib 14 is fixedly installed at the bottom of the upper fixing plate 8, and a lower fixing plate 15 is fixedly installed at the bottom of the reinforcing rib 14. Sealing strips 16 are fixedly installed at both ends of the opposite surfaces of the upper fixing plate 8 and the lower fixing plate 15.Furthermore, the blades 17 are fixedly installed at both ends of the edge sealing strip 16, a reinforcing plate 18 is fixedly installed in the middle of the blades 17, and the outer protective tube 304 is fixedly installed on the top of the reinforcing plate 18; When the above structure is in use, the outer protective tube 304 moves up and down, causing the first fixed ring 305 and the second fixed ring 306 to move relative to the piston ring 301 in an alternating manner. That is, the piston ring 301 moves up and down relative to the inner wall of the fixed inner ring 401. When the piston ring 301 moves up and down, it squeezes the damping fluid in the Tesla valve flow channel formed between the first fixed ring 305, the second fixed ring 306, the retaining ring 409, the guide plate 406, and the guide tube 407. The fluid flows back and forth within the Tesla valve channel. Since the Tesla valve cannot achieve completely unidirectional flow, the reverse flow acts as an obstacle. Because the guide plate 406 in this invention has a centrally symmetrical structure, the damping fluid flowing back and forth in the Tesla valve composed of the guide plate 406 is obstructed, which dampens the up and down movement of the piston ring 301. This buffers the staggered movement of the first fixed ring 305 and the second fixed ring 306 with the piston ring 301 driven by the outer protective tube 304.

[0021] Multiple first guide strips 6 are fixedly installed on the surface of the support tube 1. Multiple second guide strips 7 are fixedly installed on the inner wall of the connecting tube 5 corresponding to the positions of the first guide strips 6. The first guide strips 6 and the second guide strips 7 are staggered. The first guide strips 6 are provided with permanent magnets, and the permanent magnets in two adjacent first guide strips 6 have opposite magnetic properties. The second guide strips 7 are provided with coils so that when the first guide strips 6 and the second guide strips 7 move alternately in the vertical direction, the coils in the second guide strips 7 generate alternating current. When the above structure is in use, when the outer protective tube 304 moves up and down, it will cause the connecting tube 5 to move up and down, and the connecting tube 5 will cause the second guide bar 7 to move up and down along the direction of the first guide bar 6. This will cause the coil inside the second guide bar 7 to generate an induced current. As the outer protective tube 304 moves the connecting tube 5 up and down more and more frequently, the generated induced current will become larger and larger.

[0022] A guide pipe 407 is fixedly inserted through and extends to both ends of the first partition 404 and the second partition 405. Heat transfer oil is disposed inside the guide pipe 407. A partition strip 408 is fixedly installed on the surface of the middle part of the first partition 404, and the partition strip 408 is fixedly installed on the inner wall of the fixed outer ring 403. A retaining ring 409 is fixedly installed at the top and bottom of both the first partition 404 and the fixing frame 402, and the two retaining rings 409 are respectively fixedly installed at one end of the opposite face of the first fixing ring 305 and the second fixing ring 306, so that heat transfer oil flows from the guide plate 406 and... The damping fluid flowing out of the Tesla valve flow channel formed between the guide pipes 407 only reciprocates within the piston ring 301, the first fixed ring 305, the second fixed ring 306, and the Tesla valve flow channel. The inner wall of the outer protective tube 304, corresponding to the position of the retaining ring 409, has a connecting groove 412. A connecting component 413 connecting two connecting grooves 412 is fixedly embedded in the side wall of the outer protective tube 304, so that the interior of the top connecting groove 412, the interior of the multiple top guide pipes 407, the space formed by the surface of the fixed inner ring 401 and the fixing bracket 402, and the bottom... Multiple guide pipes 407 and the bottom connecting groove 412 form a heat transfer oil circulation channel through a connecting assembly 413. The connecting assembly 413 includes an electric heating tube 4131, and the coil inside the second guide bar 7 is electrically connected to the electric heating tube 4131 so that the electric heating tube 4131 is heated by electricity. Both ends of the electric heating tube 4131 are respectively fixedly installed with connecting pipes 4132. The opposite ends of the two connecting pipes 4132 are respectively provided with one-way valves in opposite directions. A buffer hose 4133 is provided in the middle of the connecting pipe 4132. A rubber cover 410 is fixedly installed on the top of the moving pipe 302, and the rubber cover 410 is fixedly installed on the top of the first fixing ring 305. The sealing bellows 307 has multiple through holes 411 in the middle of the corresponding internal position of the rubber cover 410, so that when the first moving pipe 302 moves up and down, it drives the internal volume of the rubber cover 410 to change. The through holes 411 cooperate with the one-way valves and buffer hoses 4133 at both ends of the two connecting pipes 4132 to make the heat transfer oil inside the heat transfer oil circulation channel circulate. The guide pipe 407 is a thermal expansion material component. In use, the above structure generates heat through the electric heating tube 4131. When the first movable tube 302 moves up and down, it continuously squeezes and stretches the rubber cover 410, changing its volume. This causes the rubber cover 410 to circulate continuously in the heat transfer oil circulation channel through the through hole 411, the two connecting tubes 4132 with opposite directions of one-way valves, and the expandable buffer hose 4133. This ensures that the heat transfer oil heated by the electric heating tube 4131 circulates continuously in the heat transfer oil circulation channel. This causes the guide tube 407, which is made of thermally expandable material, to be uniformly heated and expand, thereby increasing the resistance of the Tesla valve flow channel. This further hinders the up and down movement of the piston ring 301. In other words, when the blade 17 is frequently bounced up and down by the waves, it further hinders the up and down movement of the blade 17, thus achieving the purpose of adaptively adjusting the damping according to different needs.

[0023] Working principle: When in use, the invention causes the blade 17 to move up and down through the reinforcing plate 18 when it bounces up and down with the waves, thus moving the outer protective tube 304 up and down. When the outer protective tube 304 moves up and down, it causes the first fixed ring 305 and the second fixed ring 306 to move relative to the piston ring 301 in an alternating manner. That is, the piston ring 301 moves up and down relative to the inner wall of the fixed inner ring 401. When the piston ring 301 moves up and down, it causes the piston ring 301 to squeeze the damping fluid in the Tesla valve flow channel formed between the first fixed ring 305, the second fixed ring 306, the retaining ring 409, the guide plate 406, and the guide tube 407. The flow reciprocates within the valve channel. Since the Tesla valve cannot achieve completely unidirectional flow, the reverse flow acts as an obstacle. Because the guide plate 406 in this invention has a centrally symmetrical structure, the reciprocating flow of the damping fluid in the Tesla valve composed of the guide plate 406 is obstructed, which dampens the up-and-down movement of the piston ring 301. This buffers the staggered movement of the first fixed ring 305 and the second fixed ring 306 with the piston ring 301 driven by the outer protective tube 304. When the outer sheath 304 moves up and down, it causes the connecting pipe 5 to move up and down, and the connecting pipe 5 causes the second guide bar 7 to move up and down along the direction of the first guide bar 6. This causes the coil inside the second guide bar 7 to generate an induced current. As the outer sheath 304 moves up and down the connecting pipe 5 more and more frequently, the induced current will become larger and larger, thus energizing the electric heating tube 4131 and causing it to heat up. When the piston ring 301 drives the first movable tube 302 and the second movable tube 303 to move up and down, the first movable tube 302 will continuously squeeze and stretch the rubber cover 410 and change the volume of the rubber cover 410. This causes the rubber cover 410 to continuously contact the inside of the top connecting groove 412, the inside of the multiple top guide tubes 407, and the fixed inner ring through the through hole 411. The space formed by the surface of 401 and the fixed frame 402, the interior of the multiple bottom guide pipes 407, and the interior of the bottom connecting groove 412 are pressurized and depressurized through the heat transfer oil circulation channel formed by the connecting component 413. With the help of the one-way valves with opposite directions at both ends of the two connecting pipes 4132 and the expandable buffer hose 4133, the heat transfer oil heated by the electric heating pipe 4131 continuously circulates in the heat transfer oil circulation channel. This makes the guide pipes 407, which are made of thermal expansion material, uniformly heated and causes the guide pipes 407 to expand, thereby increasing the resistance of the Tesla valve flow channel and further hindering the up and down movement of the piston ring 301. That is, when the blade 17 is frequently bounced up and down by the waves, it further hinders the up and down movement of the blade 17, thereby achieving the purpose of adaptively adjusting the damping according to different needs. By setting the third movable tube 308 to move up and down on the inner wall of the support tube 1, the movement of the third movable tube 308 and the support shaft 2 is guided. At the same time, by setting the return spring 309, the support shaft 2 is prevented from making rigid contact with the support tube 1, and the movement of the support shaft 2 is restored. Example 2: In one embodiment, an installation tube 414 is provided between two adjacent first partitions 404. An electromagnetic coil 415 is provided on the surface of the installation tube 414, and the electromagnetic coil 415 is directly electrically connected to the second guide strip 7 that generates induced alternating current. The damping fluid is a magnetorheological fluid composed of magnetic particles, a base fluid, and additives. By filling the Tesla valve channel with damping fluid of magnetorheological fluid, when the propeller 17 is frequently bounced up and down by the waves, the induced current generated by the coil in the second guide bar 7 will become larger and larger. This will make the magnetic field generated by the electromagnetic coil 415 become larger and larger, that is, the viscosity of the magnetorheological fluid will become higher and higher. This will further improve the damping of the reciprocating flow of the magnetorheological fluid in the Tesla valve channel, that is, hinder the up and down movement of the piston ring 301. This will further hinder the up and down movement of the propeller 17 when it is frequently bounced up and down by the waves, thus achieving the purpose of adaptively adjusting the damping according to different needs.

[0024] Example 3: In one embodiment, the mounting tube 414 is a metal component; By using a metal component as the mounting tube 414, when the propeller blade 17 is frequently bounced up and down by the waves, the induced current generated by the coil inside the second guide bar 7 will increase, which will increase the magnetic field generated by the electromagnetic coil 415. Eddy currents will be generated inside the mounting tube 414 located within the alternating magnetic field of the electromagnetic coil 415, resulting in energy loss inside the mounting tube 414. This causes the mounting tube 414 to heat up, and the heat is transferred through the guide plate 406 and the heat transfer oil to the guide tube 407, thereby heating the guide tube 407. After being heated, the guide tube 407 will expand, thereby increasing the resistance of the Tesla valve flow channel, further hindering the up and down movement of the piston ring 301. That is, when the propeller blade 17 is frequently bounced up and down by the waves, it further hinders the up and down movement of the propeller blade 17, thus achieving the purpose of adaptively adjusting the damping according to different needs.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the 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 to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A squeak stopper based on a ship's suspension rudder, characterized in that: include: A support tube (1) is fixedly installed at the bottom of the paddle (11). The inner wall of the support tube (1) is provided with a support shaft (2) that moves vertically up and down. The bottom of the support shaft (2) is provided with a buffer assembly. The buffer assembly includes a piston ring (301), a first movable tube (302), a second movable tube (303), a first fixed ring (305), and a second fixed ring (306). The piston ring (301) is fixedly connected to the bottom of the support shaft (2) so that the support shaft (2) drives the piston ring (301) to move up and down between the first fixed ring (305) and the second fixed ring (306). A damping assembly is provided between the first fixed ring (305) and the second fixed ring (306). The damping assembly includes a fixed inner ring (401) movably connected to the surface of the piston ring (301). A fixed frame (402) is fixedly connected to the surface of the fixed inner ring (401). A fixed outer ring (403) is fixedly embedded in the middle of the side wall of the fixed frame (402) away from the fixed inner ring (401). A first partition (404) and a second partition (405) are fixedly connected radially in the middle of the fixed frame (402). A plurality of guide plates (406) and guide pipes (407) are fixedly connected in the middle of the first partition (404) and the second partition (405), forming a Tesla valve flow channel. The guide plates (406) have a symmetrical structure in the middle so that both ends of the Tesla valve flow channel are unidirectional. The guide pipes (407) have a deformation function to change the resistance of the liquid passing through the Tesla valve flow channel. The Tesla valve flow channel is provided with damping fluid. The inner wall of the support tube (1) is movably connected to a third movable tube (308) that moves up and down, and the surface of the third movable tube (308) is tightly fitted with the inner wall of the support tube (1). The third movable tube (308) is fixedly connected to the top of the support shaft (2), and a return spring (309) is fixedly connected to the bottom of the third movable tube (308). The return spring (309) is fixedly connected to the bottom of the inner wall of the support tube (1). The first movable tube (302) and the second movable tube (303) are respectively fixedly connected to the top and bottom of the piston ring (301). The first movable tube (302) is movably connected to the inner wall of the first fixed ring (305), and the second movable tube (303) is movably connected to the inner wall of the second fixed ring (306). Sealing rings are fixedly connected to the surface of the piston ring (301) and the inner walls of the first fixed ring (305) and the second fixed ring (306), respectively, so that there is a seal between the first movable tube (302) and the first fixed ring (305), and between the second movable tube (303) and the second fixed ring (306). A dynamic seal is maintained between the piston ring (301) and the fixed inner ring (401). Sealing bellows (307) are fixedly connected between the top of the first movable tube (302) and the top of the first fixed ring (305) and between the bottom of the second movable tube (303) and the bottom of the second fixed ring (306) to enhance the sealing between the first movable tube (302) and the first fixed ring (305) and between the second movable tube (303) and the second fixed ring (306). An outer protective tube (304) is fixedly connected to the surface of the first fixed ring (305) and the second fixed ring (306). The top of the outer protective tube (304) is fixedly connected to a connecting tube (5), the top of the connecting tube (5) is fixedly connected to a mounting bracket (9), the bottom of the mounting bracket (9) is fixedly connected to an upper fixing plate (8), and the connecting tube (5) passes through and extends to both ends of the upper fixing plate (8). The top of the support tube (1) is fixedly connected to a mounting plate (10), the mounting plate (10) is fixedly connected to the bottom of the propeller (11), and one end of the opposite face of the mounting bracket (9) and the propeller (11) is fixedly connected to a guide comb (13) so that the relative movement of the mounting bracket (9) and the propeller (11) is guided by the guide comb (13). A sealing flexible tube (12) is fixedly connected between the mounting plate (10) and the mounting bracket (9) to seal the connection tube (5) and the support tube (1). A reinforcing rib (14) is fixedly connected to the bottom of the upper fixing plate (8), and a lower fixing plate (15) is fixedly connected to the bottom of the reinforcing rib (14). An edge sealing strip (16) is fixedly connected to both ends of the opposite sides of the upper fixing plate (8) and the lower fixing plate (15). The blade (17) is fixedly connected to the front and rear ends of the edge sealing strip (16). A reinforcing plate (18) is fixedly connected to the middle of the blade (17), and an outer protective tube (304) is fixedly connected to the top of the reinforcing plate (18).

2. A drogue based on a ship's suspended rudder according to claim 1, characterized in that: The surface of the support tube (1) is fixedly connected with a plurality of first guide strips (6), and the inner wall of the connecting tube (5) corresponding to the position of the first guide strips (6) is fixedly connected with a plurality of second guide strips (7), and the first guide strips (6) and the second guide strips (7) are staggered. The first guide strips (6) are provided with permanent magnets, and the permanent magnets in two adjacent first guide strips (6) have opposite magnetic properties. The second guide strips (7) are provided with coils, so that when the first guide strips (6) and the second guide strips (7) move alternately in the vertical direction, the coils in the second guide strips (7) generate alternating current.

3. A drogue based on a ship's suspended rudder according to claim 2, characterised in that: The guide pipe (407) is fixedly inserted through and extends to both ends of the first partition (404) and the second partition (405). The guide pipe (407) is filled with heat transfer oil. A partition strip (408) is fixedly connected to the surface of the middle part of the first partition (404), and the partition strip (408) is fixedly connected to the inner wall of the fixed outer ring (403). The top and bottom of the first partition (404) and the fixing frame (402) are respectively fixedly connected with retaining rings (409), and the two retaining rings (409) are respectively fixedly connected to one end of the opposite face of the first fixing ring (305) and the second fixing ring (306), so that a Tesla valve flow channel is formed between the guide plate (406) and the guide pipe (407). The damping fluid flows back and forth only within the piston ring (301), the first fixed ring (305), the second fixed ring (306), and the Tesla valve flow channel. The inner wall of the outer protective tube (304) corresponding to the position of the retaining ring (409) is provided with a connecting groove (412), and the side wall of the outer protective tube (304) is fixedly embedded with a connecting component (413) connecting the two connecting grooves (412), so that the interior of the top connecting groove (412), the interior of the multiple top guide pipes (407), the interior of the space formed by the fixed inner ring (401) and the fixed frame (402), the interior of the multiple bottom guide pipes (407), and the interior of the bottom connecting groove (412) form a heat transfer oil circulation channel through the connecting component (413).

4. A drogue based on a ship's suspended rudder according to claim 3, characterised in that: The connecting component (413) includes an electric heating tube (4131), and the coil inside the second guide bar (7) is electrically connected to the electric heating tube (4131) so that the electric heating tube (4131) is heated by electricity. Both ends of the electric heating tube (4131) are respectively fixedly connected to a connecting tube (4132). The opposite ends of the two connecting tubes (4132) are respectively provided with one-way valves in opposite directions. The middle part of the connecting tube (4132) is provided with a buffer hose (4133).

5. A drogue based on a ship's suspended rudder according to claim 4, characterised in that: A rubber cover (410) is fixedly connected to the top of the first movable tube (302), and the rubber cover (410) is fixedly connected to the top of the first fixed ring (305). The sealing bellows (307) has multiple through holes (411) in the middle of the corresponding position inside the rubber cover (410) so that the volume inside the rubber cover (410) changes when the first movable tube (302) moves up and down. The through holes (411) cooperate with the one-way valves and buffer hoses (4133) at both ends of the two connecting pipes (4132) to make the heat transfer oil inside the heat transfer oil circulation channel circulate. The guide pipe (407) is a thermal expansion material component.

6. A drogue based on a ship's pendant according to claim 5, characterised in that: An installation tube (414) is provided between two adjacent first partitions (404). An electromagnetic coil (415) is provided on the surface of the installation tube (414), and the electromagnetic coil (415) is directly electrically connected to the second guide bar (7) that generates induced alternating current.

7. A drogue based on a ship's suspended rudder according to claim 6, characterised in that: The mounting tube (414) is a metal component.

Images