CN113650772B - Ship jet flow rudder with air curtain noise reduction function - Google Patents
Ship jet flow rudder with air curtain noise reduction function Download PDFInfo
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- CN113650772B CN113650772B CN202111107110.4A CN202111107110A CN113650772B CN 113650772 B CN113650772 B CN 113650772B CN 202111107110 A CN202111107110 A CN 202111107110A CN 113650772 B CN113650772 B CN 113650772B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
- B63H25/382—Rudders movable otherwise than for steering purposes; Changing geometry
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The invention belongs to the technical field of jet rudders, and particularly relates to a ship jet rudder with an air curtain noise reduction function. The invention utilizes the air curtain noise reduction principle and the jet technology, can realize the curtain wall formed by jetting bubbles to the two sides of the control surface near the tail of the rudder, and can also jet liquid flows to the two sides of the control surface in the middle part respectively to adjust the flow velocity on the surface of the rudder so as to optimize the control effect. The invention can effectively improve the external noise characteristics of the ship or the submersible vehicle and the rudder effect, has the equivalent safety guarantee and self-cleaning capability, can realize the adjustment of specific performance by changing part of module accessories, and enhances the adaptability of the rudder under different conditions. Therefore, the invention has good application prospect and practical significance.
Description
Technical Field
The invention belongs to the technical field of jet rudders, and particularly relates to a jet rudder of a ship with an air curtain for noise reduction.
Background
The main functions of the jet rudder of the ship with the air curtain noise reduction are air curtain noise reduction and rudder effect optimization realized by utilizing a bubble noise reduction technology and a jet technology. The principle of air curtain noise reduction is that the noise emitted by the ship can be significantly reduced when passing through a dense bubble curtain wall, and the noise characteristics of the ship can be improved and the sound level detected outside can be reduced by generating an air curtain around the ship body. The jet flow technology is used on the surface of the rudder because the performance of the rudder is related to the lift force generated by the rudder body, and the lift force is positively related to the flow speed, so that the jet flow on the surface of the rudder can change the flow field and the circulation near the rudder surface, and further influences the lift force to optimize the efficiency of the rudder. The traditional rudder mostly selects structural methods such as improving wing profiles and adding flow control plates, and the like, so that the two technologies adopted on the rudder have great innovative significance and practical value.
Disclosure of Invention
The invention aims to provide a jet rudder of a ship with an air curtain for reducing noise.
The purpose of the invention is realized by the following technical scheme: the device comprises a water channel 1, an air channel 2, a cable 3 and a rudder post 4; the rudder post 4 enters from the upper end of the middle part of the rudder body of the jet flow rudder and extends into the rudder body; the rudder post 4 extending into the rudder body is provided with a flange 5, and the fixation of the rudder post 4 and the rudder body is strengthened through the flange 5; the water channel 1 enters from the top surface of the rudder post 4, extends out from the bottom surface of the rudder post 4 and is connected with the throttle valve 9; two sides of the throttle valve 9 are respectively provided with a row of pipelines which lead to a secondary electric control liquid valve 10 near the control surface, and the secondary electric control liquid valve 10 is connected with a row-shaped spray head 11 communicated with the opening of the control surface; an electric control liquid valve 8 is arranged at the outlet of the water channel 1 on the bottom surface of the rudder post 4; the air duct 2 enters from the top surface of the rudder post 4 and extends out from the rear side surface of the rudder post 4 in two directions, and each air duct 2 horizontally moves to the rudder tail of the jet flow rudder along the outlet and is connected with the electric control air valve 13; the electric control air valve 13 is connected with the inlet end of a honeycomb device 14 which is vertically arranged, and the outlet end of the honeycomb device 14 is connected with an air grid 15 the outer surface of which is flush with the control surface 7 of the jet flow rudder; the cable 3 enters from the top surface of the rudder post 4 and is connected with the electric control liquid valve 8, the throttle valve 9, the secondary electric control liquid valve 10 and the electric control air valve 13.
The present invention may further comprise:
a motor 27 is arranged on one side in the throttle valve 9, an opening connected with the main water channel 21 is formed in the upper part of the other side, two water diversion channels 24 with a flow diversion function are formed in the side wall of the main water channel 21, the tail ends of the water diversion channels 24 are forked to two sides and are used for being respectively connected with water channels with different trends, and a slide rail 30 perpendicular to the water diversion channels is arranged between the two water diversion channels 24; the output end of the motor 27 is connected with a convex shaft 26 supported by the bearing 18, and one side of the convex shaft 26 close to the motor 27 is provided with a clamp 19 for limiting rotation; the sliding rail 30 is provided with a sliding block 28, the sliding block 28 is flush with the protruding part of the protruding shaft 26 to ensure the transmission of motion, and the sliding block 28 is connected with the tail end of the sliding rail 30 through a spring 31 to facilitate the self-recovery of the sliding block 28 after transverse motion.
The lower edge of the outlet of the row-shaped spray head 11 and the outer side surface of the air grid 15 are flush with the control surface of the jet flow rudder, and the extension line of the outlet of the row-shaped spray head 11 along the direction of the control surface of the jet flow rudder passes through the outer side surface of the air grid 15, so that the liquid flow sprayed by the row-shaped spray head 11 can wash the surface of the air grid 15.
The invention has the beneficial effects that:
the invention utilizes the air curtain noise reduction principle and the jet technology, can realize the curtain wall formed by jetting bubbles to the two sides of the control surface near the tail of the rudder, and can also jet liquid flows to the two sides of the control surface in the middle part respectively to adjust the flow velocity on the surface of the rudder so as to optimize the control effect. The invention can effectively improve the external noise characteristics of the ship or the submersible vehicle and the rudder effect, has the equivalent safety guarantee and self-cleaning capability, can realize the adjustment of specific performance by changing part of module accessories, and enhances the adaptability of the rudder under different conditions. Therefore, the invention has good application prospect and practical significance.
Drawings
Fig. 1 is a front view of a jet rudder of a ship for reducing noise by air curtain.
Fig. 2 is a schematic top view of a jet rudder of a ship for air curtain noise reduction.
Fig. 3 is a schematic view of a throttle valve structure of a jet rudder of a ship for air curtain noise reduction.
Fig. 4 is a schematic structural view of a throttle valve of a jet rudder of a ship for air curtain noise reduction at a convex shaft section.
Fig. 5 is a schematic view of a honeycomb structure of a jet rudder of a ship for air curtain noise reduction.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention belongs to a ship rudder which can jet bubbles and accelerate liquid flow by utilizing the structural characteristics of the ship rudder under the support of gas and liquid pressure. The curtain wall formed by the bubbles can effectively block and reduce noise generated when the ship and the submersible vehicle are sailed, and the probability of detecting the ship and the submersible vehicle is reduced; and in the use of rudder, if the flow velocity of the fluid on the surface of the rudder can be increased, the change of the rudder section annular quantity is achieved, and then the surface lift force is influenced, thereby adjusting the rudder effect, and in addition, the ejected high-speed fluid flow can be realized. The traditional rudder is a solid wing structure connected with a rudder stock, the interior of the jet flow rudder of the air curtain noise reduction ship provided by the invention comprises a water channel, an air channel, a honeycomb device, various valves and other structures, and by means of the built-in structures, the jet flow rudder can eject air and liquid with air pressure and liquid conveyed by a rudder post through an air grid and a spray head, so that the purposes of air curtain noise reduction and jet flow change of rudder effect are achieved.
The rudder post connected with the jet rudder comprises three channels, namely an air channel, a water channel and a cable, wherein the air channel, the water channel and the cable are used for providing fluid required by spraying, and the cable is used for providing electric power required by each device in the rudder body. A rudder post which is longer in extension is arranged in the rudder body, and a flange plate provided with a fixing pin is arranged on the extension part and used for strengthening the connection between the rudder post and the rudder body; and the bottom of the rudder post is provided with a pair of air channels and water channel outlets. Connected to the outlet of the duct is a responsive electrically controlled air valve which controls the air grid of the honeycomb and control surface and acts as a seal to prevent the intrusion of external fluids into the internal structure. The honeycomb device is a block with compact holes, can rectify the pressed-in gas, when external liquid contacts the honeycomb device, the rectified air can form bubbles at the outer holes and is pressed out, and the pressed-out bubbles can pass through an air grid with larger size relative to the honeycomb holes and then diffuse in the direction of the air grid arrangement to generate an air curtain. The water channel outlet is connected with an electric control safety valve and a throttle valve near the bottom of the rudder post, the safety valve and the air valve are simple electric control valves, and the throttle valve is a structure which utilizes a motor to provide torque to realize the rotation of the camshaft to adjust the position of the attached slide block. The slide block can reciprocate on a slide rail for cutting off the water channel, and can change the section of the water channel at the position by adjusting the relative position of the slide block and the water channel, thereby controlling the flow. And a spring which can provide restoring force is arranged on the other side of the protruding shaft relative to the sliding block, so that support is provided for the sliding block to move in two directions. The water channels are extended from the throttle valve to both sides of the rudder and connected with the row-shaped nozzles controlled by the valves.
The jet flow rudder can effectively improve the external noise characteristics of a ship or a submersible vehicle and the rudder effect, has the equivalent safety guarantee and self-cleaning capability, can realize the adjustment of specific performance by changing part of module accessories, and enhances the adaptability of the rudder under different conditions. Therefore, the invention has good application prospect and practical significance.
A ship jet flow rudder with air curtain noise reduction comprises a water channel 1, an air channel 2, a cable 3 and a rudder post 4; the rudder post 4 enters from the upper end of the middle part of the rudder body of the jet flow rudder and extends into the rudder body; the rudder post 4 extending into the rudder body is provided with a flange 5, and the fixation of the rudder post 4 and the rudder body is strengthened through the flange 5; the water channel 1 enters from the top surface of the rudder post 4, extends out from the bottom surface of the rudder post 4 and is connected with the throttle valve 9; two sides of the throttle valve 9 are respectively provided with a row of pipelines which lead to a secondary electric control liquid valve 10 near the control surface, and the secondary electric control liquid valve 10 is connected with a row-shaped spray head 11 communicated with the opening of the control surface; an electric control liquid valve 8 is arranged at the outlet of the water channel 1 on the bottom surface of the rudder post 4; the air duct 2 enters from the top surface of the rudder post 4 and extends out from the rear side surface of the rudder post 4 in two directions, and each air duct 2 on each side horizontally moves to the rudder tail of the jet flow rudder along the outlet and is connected with the electric control air valve 13; the electric control air valve 13 is connected with the inlet end of a honeycomb device 14 which is vertically arranged, and the outlet end of the honeycomb device 14 is connected with an air grid 15 the outer surface of which is flush with the control surface 7 of the jet flow rudder; the cable 3 enters from the top surface of the rudder post 4 and is connected with the electric control liquid valve 8, the throttle valve 9, the secondary electric control liquid valve 10 and the electric control air valve 13.
A motor 27 is arranged on one side in the throttle valve 9, an opening connected with the main water channel 21 is formed in the upper part of the other side, two water diversion channels 24 with a flow diversion function are formed in the side wall of the main water channel 21, the tail ends of the water diversion channels 24 are forked to two sides and are used for being respectively connected with water channels with different trends, and a slide rail 30 perpendicular to the water diversion channels is arranged between the two water diversion channels 24; the output end of the motor 27 is connected with a convex shaft 26 supported by the bearing 18, and one side of the convex shaft 26 close to the motor 27 is provided with a clamp 19 for limiting rotation; the slide rail 30 is provided with a slide block 28, the slide block 28 is flush with the protruding part of the protruding shaft 26 to ensure the transmission of motion, and the slide block 28 is connected with the tail end of the slide rail 30 through a spring 31 to facilitate the self-recovery of the slide block 28 after transverse motion.
The lower edge of the outlet of the row-shaped spray head 11 is flush with the outer side surface of the air grid 15 and the control surface of the jet flow rudder, and the extension line of the outlet of the row-shaped spray head 11 along the direction of the control surface of the jet flow rudder passes through the outer side surface of the air grid 15, so that the liquid flow sprayed by the row-shaped spray head 11 can flush the surface of the air grid 15.
The air entering the rudder body from the air duct in the rudder post is divided into two air duct outlets on the side surface of the rudder post and flows to the electric control air valves on the two wings at the tail of the rudder, the air valves control whether the air can enter the honeycomb device at the lower part to form bubbles or not under the action of the air valves, and the air duct is locked when the air curtain function is closed, so that external fluid is prevented from flowing backwards into the air duct from the air grid through the honeycomb device. After the electric control air valve is opened, air with stable pressure enters the honeycomb device, bubbles are evenly output through the branch pipelines, the honeycomb body and the streamline holes of the honeycomb device, and the direction of the bubbles can be changed according to the boundary when the bubbles pass through the smooth grids of the air grid, so that the purpose of outputting an air curtain to the designated direction is achieved. The specific parameters of the ejected bubbles can be adjusted by changing the air grid and the honeycomb device, and then the specific effect of noise reduction of the air curtain is adjusted. When the air valve is closed, the input air pressure is reduced in advance to prevent the valve from being damaged.
The liquid flow entering the rudder body from the water channel in the rudder post reaches a first electric control liquid valve (the valve is a safety valve and plays the role of closing and protecting the main water channel and is used as a main switch for the jet flow function in the rudder body) at the bottom of the extension of the rudder post. Before the safety valve is opened, the motor and the clamp in the throttle valve are controlled to enable the protruding shaft to rotate, so that the sliding block is pushed to the position required by current jet flow, and the cross section of a water diversion channel in the throttle valve meets the requirement of jet flow. And then opening a safety valve, enabling liquid flow to enter a throttling valve and flow to a secondary electric control liquid valve at two sides along the tail end of the water diversion channel, controlling whether the liquid flow can be sprayed out from the spray head and closing the rudder body under the action of the secondary electric control liquid valve, and adjusting the flow speed of jet flow by utilizing the difference between the section of the spray head and the section of the nozzle when the spray head is opened. When the second-stage electric control liquid valve is opened, liquid flows are ejected from the small nozzles in parallel at a high speed and flow to the tail of the rudder along the vicinity of the rudder surface, so that the outer surface of the air grid is flushed, and the protective and cleaning effects are achieved. After the liquid flow is sprayed out, the flow field on the control surface is changed, when the control body rotates along with the control of the steering engine, the control console connected with the cable terminal according to the jet flow requirement respectively controls the opening and closing of the two-stage electric control liquid valves on the two sides, so that the single (double) side control surface generates additional lift force brought by the jet flow, and the purpose of optimizing the control effect is achieved.
Example 1:
the invention aims to provide a novel marine rudder which has better efficiency and stealth capability compared with a traditional rudder by utilizing an air curtain noise reduction principle and a jet technology. The jet flow rudder is connected with externally input jet air, liquid and cables through a rudder post, and can realize a curtain wall formed by jetting bubbles to two sides of a rudder surface near the rudder tail; meanwhile, liquid flows can be respectively sprayed on two sides of the middle rudder surface to adjust the flow speed of the rudder surface so as to optimize the rudder effect. The above functions are realized by the cooperation of the internal structure of the jet flow rudder and each valve, and the specific operation and control is a circuit for controlling the input air pressure and the hydraulic pressure and corresponding to each valve.
Reference numerals in fig. 1 to 5:
[1] a water channel; [2] an air duct; [3] a cable; [4] a rudder post; [5] a flange plate; [6] a pin; [7] a control surface; [8] an electrically controlled liquid valve (safety valve); [9] a throttle valve; [10] a secondary electric control liquid valve; [11] a row of nozzles; [12] a screw; [13] an electric control air valve; [14] a cellular device; [15] a gas grid; [16] a rudder cross section; [17] a fixed support; [18] a bearing; [19] a clamp; [20] a throttle control cable; [21] a main water channel; [22] a shaft; [23] a seal ring; [24] a water diversion channel; [25] a shaft head; [26] a protruding shaft; [27] a motor; [28] a slider; [29] a pulley; [30] a slide rail; [31] a spring; [32] a main air passage; [33] an air distributing channel; [34] an outer wall; [35] a streamlined hole; [36] a honeycomb body.
A ship jet flow rudder with an air curtain for noise reduction comprises a rudder body, a rudder post 4, a water channel 1, an air channel 2, a cable 3, an electric control air valve 13, an electric control liquid valve 8, a throttle valve 9, a row-shaped spray head 11, a honeycomb device 14, an air grid 15, a fixing pin 6, a flange plate 5 and an attachment screw 12. The water channel, the air channel and the cable enter the rudder body through the extended rudder post, a flange plate for strengthening and fixing is arranged on the rudder post extending to the inside of the rudder body, two air channel outlets and a cable port are arranged on the side surface of the rudder post, the side surface of the rudder post is provided with one side, and the bottom surface of the rudder post is provided with a water channel outlet controlled by an electric control liquid valve; for the relevant structure for realizing the air curtain function, each side of the outlet of the air duct is provided with the air duct which moves to the position near the tail of the rudder along the outlet, the electric control air valve extends downwards to be connected with the honeycomb device which is arranged vertically, and the outlet end of the honeycomb device is connected with the air grid of which the outer surface is flush with the rudder surface; for the relevant structure of the function of spraying liquid flow, a water channel outlet at the bottom of the steering column controlled by a safety valve is downwards connected with a throttle valve for regulating the flow, two sides of the throttle valve are respectively provided with a row of pipelines which lead to a control valve near the steering surface, and the control valve is connected with a row of spray heads communicated with an opening of the steering surface.
A motor 27 on one side of the throttle valve is powered by a cable, the output end of the motor is connected with a convex shaft 26 supported by a bearing 18, and the convex shaft is close to a clamp 19 with limited rotation on one side of the motor; the upper part of the other side of the throttle valve is provided with an opening connected with a main water channel 21, the side wall of the main water channel with the downward opening is provided with two water diversion channels 24 with the shunting function, and the tail ends of the water diversion channels are forked to two sides and are respectively connected with water channels in different directions; a slide rail 29 vertical to the water dividing channels is arranged in the middle of the two water dividing channels, a slide block 28 on the slide rail is flush with the protruding part of the convex shaft to ensure the transmission of motion, and springs 31 fixed on two sides of the slide rail support the transverse motion of the slide block so as to be capable of automatically restoring the position.
The electric control air valve and the electric control liquid valve both adopt a built-in electromagnet as a means for sealing the pipeline.
The lower edge of the outlet of the row-shaped spray head and the outer side surface of the air grid are flush with the jet flow control surface, and the relative position of the spray head and the air grid must meet the condition that the extension line of the outlet of the spray head along the direction of the control surface passes through the outer side surface of the air grid so as to ensure that the sprayed liquid flow can wash the surface of the air grid.
The honeycomb device is composed of a shell 34, a main air channel 32, an air dividing channel 33, a honeycomb body 36 and streamline holes 35, wherein the main air channel is connected with the air channel, the air dividing channel is used for uniformly distributing air flow to all positions of the honeycomb body, the honeycomb body is internally provided with the holes which are densely connected and regularly arranged, and the streamline holes are uniformly distributed on one side of the honeycomb device close to an air grid and used for adjusting the shape of air bubbles and outputting the air bubbles.
The flow of the jet flow rudder comprises the following steps:
when the air curtain function is started, the airflow is pressed in by the air duct 2, then reaches the air duct outlet on the side, then flows to the electric control air valve 13 at the tail of the rudder, after the electric control air valve 13 is opened, the airflow downwards enters the main air duct 32 of the honeycomb device 14, is rectified by the air dividing duct 33 and the honeycomb body 36 and sprays bubbles from the streamline holes 35, and the bubbles are sprayed to the designated direction under the guiding and separating action of the air grid 15. When the jet function is started, liquid flow is pressed in from the water channel 1, then the electric control liquid valve (safety valve) 8 is stopped, the driving motor 27 drives the shaft 22 to rotate and controls the clamp 19 to stop the convex shaft 26 at a required position through the control console connected with the terminal of the cable 3, at the moment, the convex shaft 26 pushes the slide block 28 on the slide rail to a specified position to change the section of the cut water diversion channel 24, after the adjustment of the throttle valve is completed, the electric control valve 8 is opened, the liquid flow passes through the throttle valve 9 and the branched water channel until reaching the secondary electric control liquid valve 10, after the secondary electric control liquid valve 10 is opened, high-pressure liquid flow is sprayed out from the row-shaped spray head 11 with a plurality of small nozzles, and a flow field with high flow speed is formed near the surface 7 of the rudder.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A ship jet flow rudder with air curtain noise reduction is characterized in that: comprises a water channel (1), an air channel (2), a cable (3) and a rudder post (4); the rudder post (4) enters from the upper end of the middle part of the rudder body of the jet flow rudder and extends into the rudder body; the rudder post (4) extending into the rudder body is provided with a flange (5), and the fixing of the rudder post (4) and the rudder body is strengthened through the flange (5); the water channel (1) enters from the top surface of the rudder post (4), extends out from the bottom surface of the rudder post (4) and is connected with the throttle valve (9); two sides of the throttle valve (9) are respectively provided with a row of pipelines which lead to a secondary electric control liquid valve (10) near the control surface, and the secondary electric control liquid valve (10) is connected with a row-shaped spray head (11) communicated with the opening of the control surface; an electric control liquid valve (8) is arranged at the outlet of the water channel (1) on the bottom surface of the rudder post (4); the air duct (2) enters from the top surface of the rudder post (4) and extends out from the rear side surface of the rudder post (4) in two directions, and the air duct (2) on each side horizontally moves to the rudder tail of the jet flow rudder along the outlet and is connected with the electric control air valve (13); the electric control air valve (13) is connected with the inlet end of a honeycomb device (14) which is vertically arranged, and the outlet end of the honeycomb device (14) is connected with an air grid (15) the outer surface of which is flush with the control surface (7) of the jet flow rudder; the cable (3) enters from the top surface of the rudder post (4) and is connected with the electric control liquid valve (8), the throttle valve (9), the secondary electric control liquid valve (10) and the electric control air valve (13); a motor (27) is arranged on one side in the throttle valve (9), an opening connected with the main water channel (21) is formed in the upper portion of the other side of the throttle valve, two water diversion channels (24) with a flow diversion function are formed in the side wall of the main water channel (21), the tail ends of the water diversion channels (24) are forked to two sides and used for being respectively connected with water channels in different trends, and a sliding rail (30) perpendicular to the water diversion channels is arranged between the two water diversion channels (24); the output end of the motor (27) is connected with a convex shaft (26) supported by the bearing (18), and one side of the convex shaft (26) close to the motor (27) is provided with a clamp (19) for limiting rotation; the sliding rail (30) is provided with a sliding block (28), the sliding block (28) is flush with the protruding part of the protruding shaft (26) to ensure the transmission of motion, and the sliding block (28) is connected with the tail end of the sliding rail (30) through a spring (31) to facilitate the self-recovery of the sliding block (28) after transverse motion.
2. An air curtain noise reducing marine jet rudder as claimed in claim 1, wherein: streamline holes (35) are uniformly distributed on the surface of a shell (34) of the honeycomb device (14) close to one layer of the air grid (15) and are used for adjusting the shape of bubbles and outputting the bubbles; the honeycomb device (14) is internally provided with a main air passage (32), a gas distribution passage (33) and a honeycomb body (36), the main air passage (32) is connected with the air passage (2) through an electric control air valve (13), the gas distribution passage (33) is used for uniformly distributing air flow to all parts of the honeycomb body (36), and the honeycomb body (36) is internally provided with holes which are densely connected and regularly arranged.
3. An air curtain noise reducing jet rudder of a ship according to claim 1 or 2, wherein: the lower edge of the outlet of the row-shaped spray head (11) is flush with the outer side surface of the air grid (15) and the control surface of the jet flow rudder, and the outlet of the row-shaped spray head (11) passes through the outer side surface of the air grid (15) along the extension line of the control surface direction of the jet flow rudder so as to ensure that the liquid flow sprayed by the row-shaped spray head (11) can flush the surface of the air grid (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111107110.4A CN113650772B (en) | 2021-09-22 | 2021-09-22 | Ship jet flow rudder with air curtain noise reduction function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111107110.4A CN113650772B (en) | 2021-09-22 | 2021-09-22 | Ship jet flow rudder with air curtain noise reduction function |
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| CN113650772B true CN113650772B (en) | 2022-07-12 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3467043A (en) * | 1966-11-18 | 1969-09-16 | Bowles Eng Corp | Pure fluid force generator |
| NO971368A (en) * | 1997-03-24 | 1998-06-08 | Navion Asa | Device for amplifying the steering effect of a ship's rudder |
| EP2154064B1 (en) * | 2008-08-13 | 2012-04-11 | becker marine systems GmbH & Co. KG | Rudder assembly for ships with high speeds with a cavitation reducing, twisted, in particular floating rudder |
| DK2562075T3 (en) * | 2011-08-24 | 2014-07-28 | Zuei-Ling Lin | Method of reducing rudder resistance |
| CN104875871B (en) * | 2015-05-28 | 2017-03-22 | 上海船舶研究设计院 | Rectifying device of rudder for ship |
| CN105752309B (en) * | 2016-04-06 | 2018-06-29 | 大连理工大学 | Gas transmission release device based on axial hollow rudder stock and mixed gas cavity rudder blade |
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