A new type of hub cap fin for refrigerated ship

Abstract

The utility model relates to ship propulsion auxiliary equipment technical field, concretely is a new -type cold storage ship hub cap fin, including hub cap body, be equipped with mounting post and assembly mechanism in the hub cap body, be equipped with thread groove on the mounting post, be equipped with reinforcing mechanism on the mounting post, be equipped with fin mechanism on the hub cap body, the fin mechanism includes installation mouth and locating cylinder, the installation mouth sets up in the outside of hub cap body, be equipped with fin body on the installation mouth, one end of fin body is equipped with sealing plate, sealing plate is located in the hub cap body inner wall, be equipped with sealing assembly on the sealing plate, the top of sealing plate sets up T -shaped groove, the utility model discloses three -fold fixed structure through the circumferential positioning, axial locking, propeller boss support, solves the problem that the existing hub cap fin is easy to loosen, and the sealing is poor, adapts the low temperature of cold storage ship, heavy load working condition, and the assembly is convenient, and the maintenance cost is low, and has energy -conserving nature and practicality.

Description

Technical Field

[0001] This utility model relates to the field of ship propulsion auxiliary equipment technology, specifically a novel hub cap fin for refrigerated ships. Background Technology

[0002] As is well known, refrigerated ships, as the core equipment for low-temperature cold chain transportation, operate in the marine environment for extended periods. The energy efficiency and stability of their propeller propulsion systems directly affect transportation costs and navigation safety. Hub fins, as key components of the propeller, primarily function to recover the rotational energy of the wake and eliminate hub vortices to reduce drag. However, existing hub fins for refrigerated ships suffer from the following technical defects: Traditional fins are mostly fixed with a single bolt or a simple snap-fit ​​structure. Under the vibration of ship navigation, water flow impact and low temperature environment of refrigerated ships, circumferential displacement or axial loosening is likely to occur, resulting in a significant decrease in hydrodynamic performance and even the risk of fin detachment. The propeller hub of a refrigerated ship has a large load and the material is prone to shrinkage and deformation in low temperature environment. The existing assembly mechanism of the hub cap fin lacks a structural design that can be stably matched with the propeller hub. After installation, the overall structural stability is insufficient. The hub cap body is prone to deformation due to uneven load distribution, which in turn affects the hub vortex elimination effect. To address the aforementioned issues, this invention presents a novel hub cap fin for refrigerated ships that features stable installation, reliable sealing, and excellent energy efficiency, specifically designed for the unique operating conditions of refrigerated ships. Utility Model Content

[0003] (a) Technical problems to be solved In response to the problems of easy loosening, poor sealing and insufficient structural stability of traditional products, this utility model provides a new type of refrigerated marine hub cap fin.

[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a novel refrigerated marine hub cap fin, comprising a hub cap body, wherein a mounting post and an assembly mechanism are provided within the hub cap body, the mounting post has a threaded groove and a reinforcing mechanism, the hub cap body has a fin mechanism, the fin mechanism includes an installation port and a positioning cylinder, the installation port is located on the outer side of the hub cap body, the installation port has a fin body, one end of the fin body has a sealing plate, the sealing plate is located on the inner wall of the hub cap body, the sealing plate has a sealing component, the top of the sealing plate has a T-shaped groove, the T-shaped groove has a T-shaped plate, one end of the T-shaped plate is fixed to the positioning cylinder, the installation port has multiple ports arranged in a circular array, and the threaded groove has a threaded cylinder.

[0005] Furthermore, the bottom end of the threaded cylinder is provided with an anti-slip plate, which abuts against the top end of the positioning cylinder.

[0006] Furthermore, the assembly mechanism includes a mounting block, which is installed on the top of the inner wall of the hub cap body. The mounting block has mounting holes, and multiple mounting blocks are arranged in a circular array.

[0007] Furthermore, the sealing component is a sealing strip, which is installed around the sealing plate and around the fin body.

[0008] Furthermore, the reinforcement mechanism includes a reinforcement column, which is installed on the outside of the mounting column. One end of the reinforcement column abuts against the inner wall of the hub cap body. Multiple reinforcement columns are provided and arranged in a circular array.

[0009] Furthermore, a support column is provided at the top of the reinforcing column, and the support column abuts against the inner wall of the hub cap body.

[0010] Furthermore, a sealing ring groove is provided at the top of the hub cap body, and a sealing ring is provided on the sealing ring groove. There are two sealing ring grooves.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a novel refrigerated marine hubcap fin, which has the following beneficial effects: This novel refrigerated marine hubcap fin achieves precise circumferential positioning of the fins through a T-slot and T-plate combination structure, preventing circumferential offset during rotation. A threaded cylinder is then screwed into the mounting post's threaded groove for axial clamping and fixation, forming a dual-fixation structure of circumferential positioning and axial locking. Combined with an assembly mechanism, the hubcap body is firmly fixed to the front end of the propeller hub, with the hub further supporting the threaded cylinder, forming a three-stage locking system. This completely solves the problem of fin loosening caused by vibration and impact in traditional structures, ensuring the fins always maintain the optimal installation posture and guaranteeing stable hydrodynamic performance. The design of the sealing plate and sealing components effectively fills the gap between the fin body and the mounting opening, preventing seawater from seeping into the hubcap body and avoiding seawater corrosion and low-temperature erosion of core components such as the mounting post and threaded cylinder. Fin installation requires only three steps: aligning the mounting opening, T-shaped fitting positioning, and threaded cylinder locking, making operation simple and efficient. Disassembly only requires loosening the threaded cylinder to remove the fins, without the need for complex tools. Attached Figure Description

[0012] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a left half-sectional view of the structure of this utility model; Figure 4 This is a frontal half-sectional view of the structure of this utility model.

[0013] In the diagram: 1. Hub cap body; 2. Mounting post; 3. Threaded groove; 4. Positioning cylinder; 5. Fin body; 6. Sealing plate; 7. T-shaped plate; 8. Threaded cylinder; 9. Anti-slip plate; 10. Mounting block; 11. Mounting hole; 12. Reinforcing post; 13. Support post; 14. Sealing ring groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 4 This utility model relates to a novel refrigerated marine hubcap fin, comprising a hubcap body 1, a mounting post 2 and an assembly mechanism within the hubcap body 1, a threaded groove 3 on the mounting post 2, a reinforcing mechanism on the mounting post 2, and a fin mechanism on the hubcap body 1. The fin mechanism includes a mounting port and a positioning cylinder 4. The mounting port is located on the outer side of the hubcap body 1, and a fin body 5 is mounted on the mounting port. A sealing plate 6 is located at one end of the fin body 5, situated on the inner wall of the hubcap body 1, and a sealing assembly is mounted on the sealing plate 6. A T-shaped groove is formed at the top of the sealing plate 6, and a T-shaped plate 7 is mounted on the T-shaped groove. One end of the T-shaped plate 7 is fixed to the positioning cylinder 4. Multiple mounting ports are arranged in a circular array, and a threaded cylinder 8 is mounted on the threaded groove 3. In this embodiment... Align the fin body 5 with the mounting port on the outside of the hub cap body 1, so that the sealing plate 6 at one end of the fin body 5 enters the inner wall of the hub cap body 1. Push the fin body 5 until the T-shaped groove on the sealing plate 6 is fully engaged with the T-shaped plate 7 on the positioning cylinder 4 to achieve circumferential positioning. Screw the threaded cylinder 8 into the threaded groove 3 of the mounting post 2 until the bottom end of the threaded cylinder 8 presses tightly against the top end of the positioning cylinder 4 to fix the axial position of the fin body 5. The hub cap fin, which rotates with the propeller, absorbs the rotational energy of the wake and generates positive torque, converting part of the rotational kinetic energy into propulsion. The rectification effect of the fin body 5 can weaken or eliminate the propeller hub vortex, reduce hub vortex drag, reduce the pressure drop at the rear of the propeller hub, and increase the propeller thrust by about 1.5% to 5%. Fix the hub cap body 1 to the front end of the propeller hub of the refrigerated ship through the assembly mechanism, so that the propeller hub contacts and supports the threaded cylinder 8, thereby further locking the fin body 5.

[0016] In this design, the bottom end of the threaded cylinder 8 is provided with an anti-slip plate 9, which abuts against the top end of the positioning cylinder 4. The anti-slip plate 9 is in close contact with the top end of the positioning cylinder 4, generating friction to prevent the threaded cylinder 8 from loosening due to vibration during ship navigation, ensuring the axial positioning of the fins is stable, avoiding the decline in hydrodynamic performance caused by fin loosening, and extending service life.

[0017] In this solution, the assembly mechanism includes a mounting block 10, which is installed on the top of the inner wall of the hub cap body 1. The mounting block 10 has mounting holes 11. Multiple mounting blocks 10 are arranged in a circular array. The multiple circular array of mounting blocks 10 are connected to the propeller hub through the mounting holes 11 to form a multi-point support structure, which improves the installation stability of the hub cap body 1, adapts to the heavy-load working conditions of refrigerated ships, facilitates disassembly and maintenance, reduces maintenance costs, evenly distributes the load, and prevents structural deformation caused by single-point stress.

[0018] In this solution, the sealing component is a sealing strip, which is installed around the sealing plate 6 and the fin body 5. The sealing strip fills the gaps around the sealing plate 6 and the fin body 5 to form a watertight barrier, preventing seawater from seeping into the hub cap, avoiding metal corrosion and bearing damage, reducing water leakage losses, improving the hydrodynamic efficiency of the fins, reducing vibration and noise, and improving the overall performance of the ship.

[0019] In this design, the reinforcement mechanism includes reinforcement columns 12, which are installed on the outer side of the mounting column 2. One end of the reinforcement column 12 abuts against the inner wall of the hub cap body 1. Multiple reinforcement columns 12 are arranged in a circular array, connecting the mounting column 2 to the inner wall of the hub cap, forming a radial support structure. This enhances the structural strength of the hub cap body 1, resists material shrinkage stress in the low-temperature environment of a refrigerated ship, improves impact resistance, adapts to harsh sea conditions, reduces the risk of hub cap deformation, and ensures the installation accuracy and hydrodynamic performance of the fin body 5. A support column 13 is provided at the top of the reinforcement column 12, abutting against the inner wall of the hub cap body 1. The support column 13 further connects the reinforcement column 12 to the inner wall of the hub cap, forming a double support structure. This enhances vertical support, prevents deformation of the top of the hub cap, improves structural stability, adapts to the centrifugal force generated by the high-speed rotation of the propeller, extends equipment lifespan, and reduces maintenance frequency.

[0020] In this design, a sealing ring groove 14 is provided at the top of the hub body 1, and a sealing ring is provided on the sealing ring groove 14. There are two sealing ring grooves 14, and sealing rings are installed in the two sealing ring grooves 14. They cooperate with the propeller hub to form a multi-level sealing system to provide double waterproof protection, adapt to the long-term underwater working environment of refrigerated ships, prevent low-temperature seawater from entering the propeller hub, protect the bearings and transmission system, reduce energy loss, improve propulsion efficiency, and reduce fuel consumption by about 2%.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel refrigerated marine hubcap fin, characterized in that, The device includes a hub cap body (1), which has a mounting post (2) and an assembly mechanism inside. The mounting post (2) has a threaded groove (3) and a reinforcing mechanism. The hub cap body (1) has a fin mechanism, which includes an installation port and a positioning cylinder (4). The installation port is located on the outside of the hub cap body (1). The installation port has a fin body (5). One end of the fin body (5) has a sealing plate (6). The sealing plate (6) is located on the inner wall of the hub cap body (1). The sealing plate (6) has a sealing component. The top of the sealing plate (6) has a T-shaped groove. The T-shaped groove has a T-shaped plate (7). One end of the T-shaped plate (7) is fixed to the positioning cylinder (4). The installation port has multiple ports arranged in a circular array. The threaded groove (3) has a threaded cylinder (8).

2. The novel refrigerated marine hubcap fin according to claim 1, characterized in that, The bottom end of the threaded cylinder (8) is provided with an anti-slip plate (9), which abuts against the top of the positioning cylinder (4).

3. The novel refrigerated marine hubcap fin according to claim 1, characterized in that, The assembly mechanism includes a mounting block (10), which is mounted on the top of the inner wall of the hub cap body (1). The mounting block (10) has mounting holes (11) and multiple mounting blocks (10) are arranged in a circular array.

4. A novel refrigerated marine hubcap fin according to claim 1, characterized in that, The sealing component is a sealing strip, which is installed around the sealing plate (6) and around the fin body (5).

5. A novel refrigerated marine hubcap fin according to claim 1, characterized in that, The reinforcement mechanism includes a reinforcement column (12), which is installed on the outside of the mounting column (2). One end of the reinforcement column (12) abuts against the inner wall of the hub cap body (1). Multiple reinforcement columns (12) are provided and arranged in a ring array.

6. A novel refrigerated marine hubcap fin according to claim 5, characterized in that, The top of the reinforcing column (12) is provided with a support column (13), which abuts against the inner wall of the hub cap body (1).

7. A novel refrigerated marine hubcap fin according to claim 1, characterized in that, The top of the hub cap body (1) is provided with a sealing ring groove (14), and a sealing ring is provided on the sealing ring groove (14). There are two sealing ring grooves (14).

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