Propeller protection structure for ice resistance and ice resistance

Abstract

The invention discloses a propeller protection structure for ice resistance and ice resistance. The device comprises a mounting base, a fluid ice blocking structure and an anti-impact structure, the fluid ice blocking structure and the anti-impact structure are arranged below the mounting base, the anti-impact structure is arranged on the front side of the fluid ice blocking structure, the anti-impact structure comprises a plurality of C-shaped baffles which are arranged side by side, and an inner cavity of each C-shaped baffle is a climbing groove of an arc-shaped concave surface structure; in the advancing process of the ship, crushed ice can be blocked by the C-shaped baffles, and then the crushed ice climbs along the climbing grooves and then is thrown out. The fluid ice blocking structure comprises a floating body with a front flow guide inclined face and a recoil blocking flow channel arranged on the front flow guide inclined face. The device has the advantages that the impact force of sea ice can be effectively reduced before the propeller collides with crushed ice, and the structural safety of the propeller is ensured; the whole structural design is simple, the number of parts is small, supporting is stable and reliable, convenience of installation and maintenance is guaranteed, and in addition, the whole structure is light and low in manufacturing cost.

Description

Technical Field

[0001] The invention relates to a propeller protection device for a ship, in particular to a propeller protection structure for resisting ice and blocking ice. Background Art

[0002] With the in-depth development of polar oil and gas resources and the increasingly optimized environmental conditions of the Arctic route, polar ship research has become a key global issue. As an important component of polar ships, propulsion devices are the key to ensuring ship maneuverability and seaworthiness. Efficient and reliable polar ship propulsion devices are the basis for ensuring smooth navigation of ships in harsh ice environments.

[0003] When a ship passes through an icy sea, the propeller is thin and the material is brittle in a low temperature environment, making it extremely easy to be damaged by the external environment. During navigation in an ice area, the propeller is immersed in the water at a shallow depth. The high-speed rotating propeller interacts with the sea ice, causing serious damage to the propeller blades, resulting in serious deformation of the blade tip and blade edge, which requires great attention.

[0004] In order to protect the propeller structure and prevent the blades from being seriously damaged after colliding with sea ice, which would threaten the safety of ships and personnel, in-depth research on propeller protection devices is necessary to ensure the safe navigation of polar ships. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a propeller protection structure for anti-ice and ice blocking, which has a simple structural design, is easy to install and maintain, and can effectively reduce the impact force of sea ice before the propeller collides with broken ice, thereby ensuring the safety of the propeller structure.

[0006] In order to solve the above technical problems, the propeller protection structure for anti-ice and ice blocking of the present invention includes a mounting seat fixedly installed on one side of the stern of the ship and located below the front side of the propeller, a fluid ice blocking structure and an anti-impact structure arranged below the mounting seat, the anti-impact structure is arranged on the front side of the fluid ice blocking structure, and the anti-impact structure is a plurality of "C"-shaped baffles arranged in parallel for blocking the broken ice and capable of throwing the blocked broken ice, and the inner cavity of each "C"-shaped baffle is a climbing groove of an arc-shaped concave structure, which can block the broken ice by the "C"-shaped baffle during the movement of the ship, and then climb along the climbing groove and then be thrown out. The fluid ice blocking structure includes a floating body with a front guide slope and a recoil blocking flow channel arranged on the front guide slope for impacting the broken ice.

[0007] The recoil-blocking flow channel includes a row of water inlet holes and a row of water outlet holes arranged on the front guide slope, the aperture of each water inlet hole is larger than that of each water outlet hole and has a through channel in the float, the water inlet holes are arranged below the water outlet holes and the water flows entering through each water inlet hole can be sprayed out through the water outlet holes to impact the crushed ice.

[0008] The anti-impact structure is arranged at the front side of the fluid ice-blocking structure and can be blocked in front of the water inlet hole.

[0009] The float is a wedge-shaped float, the front guide slope is the front bottom surface of the wedge-shaped float, the water inlet is arranged on the front upper side of the front bottom surface, and the water outlet is arranged on the rear lower side of the front bottom surface.

[0010] The mounting base includes an upper panel, a lower panel, and a shock absorbing ring disposed between the upper panel and the lower panel.

[0011] Each of the "C"-shaped baffles includes a lower ice-blocking section and an upper ice-removing section. The ice-blocking section and the ice-removing section are connected by a transition section and make the broken ice entering the climbing groove move as a projectile from bottom to top.

[0012] The rear edge of each "C"-shaped baffle is provided with a plug-in slot, and each "C"-shaped baffle is fixedly mounted on the front end surface of the floating body through a plug-in plate plugged into each plug-in slot.

[0013] After the front end surface of the wedge-shaped buoy and the impact-resistant structure are installed, the ice-blocking section of the "C"-shaped baffle faces the traveling direction of the ship.

[0014] The upper panel and the lower panel are both made of metal plates, the vibration-damping ring is made of synthetic rubber, and the impact-resistant structure is made of metal plates.

[0015] The fluid ice-blocking structure is made of high-strength polycarbonate material.

[0016] The opening area of ​​the water inlet hole is twice the opening area of ​​the water outlet hole.

[0017] The advantages of the present invention are: (1) By providing a fluid ice-blocking structure and an anti-impact structure with a climbing groove on the front side of the fluid ice-blocking structure, and providing a recoil-blocking flow channel on the fluid ice-blocking structure for impacting crushed ice, not only can the crushed ice be blocked by the "C"-shaped baffle during the movement of the ship, but also can be thrown out after climbing along the climbing groove and impacted again by the recoil-blocking flow channel, thereby effectively reducing the impact force of sea ice before the propeller collides with the crushed ice, thereby ensuring the safety of the propeller structure; and the fluid ice-blocking structure is cleverly used to support the fluid ice-blocking structure, so that the entire structure is simple in design, with fewer parts and components, and stable and reliable support, thereby ensuring the convenience of installation and maintenance. In addition, the mounting seat, the fluid ice-blocking structure and the anti-impact structure are mostly rubber and plastic structures, and the entire structure is light and inexpensive.

[0018] (2) The buoy is designed as a wedge-shaped buoy, which can reduce the material consumption while ensuring the support function, structural stability and recoil resistance function. In particular, the front bottom surface of the wedge-shaped buoy is used as the front guide slope, which can also resist impact and buffer the force on the hull structure.

[0019] (3) The recoil-blocking flow channel is designed as a row of water inlet holes and a row of water outlet holes arranged on the front guide slope, and the aperture of each water inlet hole is larger than that of each water outlet hole, and there is a through channel in the float, so that water can enter the water inlet and pass through the through channel before being discharged from the water outlet at an accelerated speed, thereby exerting a greater impact on the surrounding crushed ice and preventing it from colliding with the propeller.

[0020] (4) The anti-impact structure is arranged at the front side of the fluid ice blocking structure and can block the front of the water inlet to prevent sea ice from blocking the water inlet.

[0021] (5) By providing a mounting seat composed of an upper panel, a lower panel, and a shock-absorbing ring provided between the upper panel and the lower panel, the purpose of shock absorption can be achieved, thereby ensuring reliability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of a propeller protection structure for anti-icing and ice blocking according to the present invention; Figure 2 It is a side view of the propeller protection structure for anti-icing and ice blocking of the present invention; Figure 3 is a schematic diagram of a mounting base in the present invention; Figure 4 is a three-dimensional diagram of the impact-resistant structure of the present invention; Figure 5 A three-dimensional diagram of the fluid ice-blocking structure of the present invention; Figure 6 is a cross-sectional view of the fluid ice-blocking structure of the present invention; Figure 7 The figure is a schematic diagram of the use status of the propeller protection structure for anti-icing and ice blocking of the present invention. DETAILED DESCRIPTION

[0023] The propeller protection structure for anti-icing and ice blocking of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1 , 2 As shown in the figure, the propeller protection structure for anti-icing and ice blocking of the present invention comprises a mounting seat 1 fixedly mounted on one side of the stern of the ship and located below the front side of the propeller, a fluid ice blocking structure 3 and an anti-impact structure 2 arranged below the mounting seat 1. As can be seen from the figure, the mounting seat 1 is mounted on Figure 7 The area shown is located in front of the propeller structure at the rear of the hull or near the propeller area at the bottom of the ship. The anti-shock structure 2 is arranged in front of the fluid ice blocking structure 3. The anti-shock structure 2 is a plurality of "C"-shaped baffles arranged in parallel for blocking the broken ice and throwing the blocked broken ice. The inner cavity of each "C"-shaped baffle is a climbing groove of an arc-shaped concave structure, such as Figure 1 , 2 As shown in Figure 4, each "C"-shaped baffle includes a lower ice-blocking section 22 and an upper ice-removing section 21. The ice-blocking section 22 and the ice-removing section 21 are connected by a transition section and the crushed ice entering the climbing groove forms a projectile movement from bottom to top. It can be seen from the figure that the curvature radius of the ice-blocking section 22 is greater than the curvature radius of the ice-removing section 21, so that the climbing and projecting effect can be achieved. Therefore, during the movement of the ship, the crushed ice can be blocked by the ice-blocking section 22 of the "C"-shaped baffle, and then thrown out by the ice-removing section 21 after climbing along the climbing groove. Therefore, the ice-removing plate 21 and the ice-blocking plate 22 follow the hull forward, and the crushed ice accumulates to obtain the power to climb along the baffle, reducing the impact of the ice body and the propeller structure. The fluid ice-blocking structure 3 includes a floating body 31 with a front guide slope and a recoil blocking flow channel arranged on the front guide slope for impacting the crushed ice, as shown in Figure 4. Figure 1 , 5As shown in Figure 6, in this embodiment, the floating body 31 is a wedge-shaped floating body. The wedge-shaped floating body 31 can not only play a supporting role to ensure the stability of the structure, but also resist impact and buffer the force of the structure. After the front end surface of the floating body of the wedge-shaped floating body is installed with the impact-resistant structure 2, the ice retaining section 22 of the "C"-shaped baffle is facing the direction of travel of the ship, which is more conducive to shoveling the broken ice. The front bottom surface of the wedge-shaped floating body serves as a front guide slope. The recoil blocking flow channel includes a row of water inlet holes 32 and a row of water outlet holes 33 (that is, holes on the side surface of the wedge-shaped floating body) arranged on the front guide slope. The aperture of each water inlet hole 32 is larger than that of each water outlet hole 33 and The float is provided with a through channel, the water inlet holes 32 are arranged below the water outlet holes 33 (that is, the water inlet holes 32 are arranged on the front upper side of the front bottom surface, and the water outlet holes 33 are arranged on the rear lower side of the front bottom surface), and the water flow entering through each water inlet hole 32 can be sprayed out through the water outlet holes 33 to impact the crushed ice. Through the above-mentioned structural design, the water inlet holes 32 and the water outlet holes 33 and the through channel between the water inlet holes 32 and the water outlet holes 33 are utilized to accelerate the fluid, and the fluid is discharged from the water outlet holes 33, while the impact on the surrounding crushed ice prevents the ice from colliding with the propeller, thereby reducing the collision speed of the ice with the propeller.

[0025] Furthermore, the anti-impact structure 2 is arranged at the front side of the fluid ice-blocking structure 3 and can block the front of the water inlet 32 ​​to prevent the water inlet from being blocked by sea ice.

[0026] Furthermore, the mounting base 1 is a shock-absorbing structure composed of an upper panel 11, a lower panel 13 and a shock-absorbing ring 12 arranged between the upper panel 11 and the lower panel 13, that is, the upper panel 11 and the lower panel 13 have the same structure and the shock-absorbing ring 12 is arranged between the upper panel 11 and the lower panel 13. During installation, the upper panel and the lower panel are connected in parallel by bolts, and a shock-absorbing ring is arranged between the upper plate layer and the lower plate layer. The vibration-absorbing structure is connected to the hull of the ship by welding, so that it has better vibration absorption and impact resistance, and extends its service life.

[0027] Furthermore, a plug-in slot is provided at the rear edge of each "C"-shaped baffle plate, and each "C"-shaped baffle plate is fixedly mounted on the front end surface of the floating body through a plug-in plate plugged into each plug-in slot.

[0028] Furthermore, the upper panel 11 and the lower panel 13 are both made of metal plates; the vibration damping ring 12 is made of synthetic rubber; the impact-resistant structure 2 is also made of metal plates, which has the excellent characteristics of simple structure, high strength, sound insulation, cold resistance, corrosion resistance, and non-water absorption; the fluid ice-blocking structure 3 is made of high-strength polycarbonate material, which has the excellent characteristics of high impact strength, good dimensional stability, corrosion resistance, and good wear resistance.

[0029] Of course, the opening area of ​​the water inlet 32 ​​is twice the opening area of ​​the water outlet 33. This size design allows water to flow into the water inlet 32 ​​along with the forward flow of the hull and be discharged from the water outlet 33. Compared with the incoming flow, the speed is faster, the impact is stronger, and the use effect is better.

[0030] Here’s how it works: The protective structure is installed in front of the propeller structure at the rear of the hull or close to the propeller area on the bottom of the ship. During the navigation of the ship, ice blocks slide along the hull with the water flow to the rear of the hull, first acting on the ice retaining section 22, and as the hull moves forward, the broken ice accumulates and gains the power to climb, climbs along the "C"-shaped baffle groove, and is discharged above the ice-removing section 21, reducing the impact between the ice body and the propeller structure. At the same time, the ice retaining section 22 is located in front of the water inlet 32 ​​to prevent sea ice from blocking the water inlet.

[0031] Then, the incoming flow follows the hull and enters the water inlet 32. There is a chamber (through channel) inside the wedge-shaped float 31 connecting the water inlet and the water outlet 33. The fluid is discharged from the water outlet 33. The opening area of ​​the water inlet 32 ​​is twice the opening area of ​​the water outlet 33. The fluid discharged from the water outlet is faster than the incoming flow, and the impact on the surrounding crushed ice prevents the ice from colliding with the propeller, reduces the collision speed between the ice and the propeller, and thus protects the propeller structure.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A propeller protection structure for anti-icing and ice blocking, characterized in that: The invention comprises a mounting seat (1) fixedly mounted on one side of the stern of a ship and located below the front side of a propeller, a fluid ice-blocking structure (3) and an impact-resistant structure (2) arranged below the mounting seat (1); the impact-resistant structure (2) is arranged on the front side of the fluid ice-blocking structure (3); the impact-resistant structure (2) is a plurality of "C"-shaped baffles arranged in parallel and used to block ice fragments and to throw the blocked ice fragments; the inner cavity of each "C"-shaped baffle is a climbing groove of an arc-shaped concave structure, so that when the ship is traveling, the ice fragments can be blocked by the "C"-shaped baffles and then thrown after climbing along the climbing groove; the fluid ice-blocking structure (3) comprises a floating body (31) having a front guide slope and a recoil blocking flow channel arranged on the front guide slope and used to impact the ice fragments.

2. The propeller protection structure for anti-icing and ice blocking according to claim 1, characterized in that: The recoil blocking flow channel comprises a row of water inlet holes (32) and a row of water outlet holes (33) arranged on the front flow guide slope, the aperture of each of the water inlet holes (32) is larger than that of each of the water outlet holes (33) and a through channel is provided in the float, the water inlet holes (32) are arranged below the water outlet holes (33) and the water flow entering through each of the water inlet holes (32) can be sprayed out through the water outlet holes (33) to impact the crushed ice.

3. The propeller protection structure for anti-icing and ice blocking according to claim 2, characterized in that: The impact-resistant structure (2) is arranged on the front side of the fluid ice-blocking structure (3) and can be blocked in front of the water inlet hole (32).

4. The propeller protection structure for anti-icing and ice blocking according to claim 3, characterized in that: The float (31) is a wedge-shaped float, the front flow guide slope is the front bottom surface of the wedge-shaped float, the water inlet (32) is arranged on the front upper side of the front bottom surface, and the water outlet (33) is arranged on the rear lower side of the front bottom surface.

5. The propeller protection structure for anti-icing and ice blocking according to any one of claims 1 to 4, characterized in that: The mounting seat (1) comprises an upper panel (11), a lower panel (13), and a shock absorbing ring (12) arranged between the upper panel (11) and the lower panel (13).

6. The propeller protection structure for anti-icing and ice blocking according to claim 5, characterized in that: Each of the "C"-shaped baffles comprises a lower ice retaining section (22) and an upper ice shedding section (21), wherein the ice retaining section (22) and the ice shedding section (21) are connected via a transition section and cause the crushed ice entering the climbing groove to move as a projectile from bottom to top.

7. The propeller protection structure for anti-icing and ice blocking according to claim 1, 2, 3, 4 or 6, characterized in that: The rear edge of each "C"-shaped baffle is provided with a plug-in slot, and each "C"-shaped baffle is fixedly mounted on the front end surface of the floating body through a plug-in plate plugged into each plug-in slot.

8. The propeller protection structure for anti-icing and ice blocking according to claim 6, characterized in that: After the front end surface of the wedge-shaped buoy and the impact-resistant structure (2) are installed, the ice-blocking section (22) of the "C"-shaped baffle is directly facing the traveling direction of the ship.

9. The propeller protection structure for anti-icing and ice blocking according to claim 8, characterized in that: The upper panel (11) and the lower panel (13) are both made of metal plates, the vibration-damping ring (12) is made of synthetic rubber, and the impact-resistant structure (2) is made of metal plates.

10. The propeller protection structure for anti-icing and ice blocking according to claim 9, characterized in that: The fluid ice-blocking structure (3) is made of high-strength polycarbonate material; the propeller protection structure for anti-icing according to claim 2, 3 or 4 is characterized in that the opening area of ​​the water inlet hole (32) is twice the opening area of ​​the water outlet hole (33).

Images