Full-speed fin stabilizer without occupied space

Abstract

The invention relates to a full-speed fin stabilizer without occupied space, and belongs to the technical field of fin stabilizers, and the fin stabilizer comprises a fin angle feedback device, a rotating vane oil cylinder, a supporting seat assembly, a rotating shaft assembly and a fin; the supporting seat assembly comprises a supporting shaft and a first rolling bearing; the supporting shaft is of a hollow shaft structure, one end of the supporting shaft is fixed to the ship body, and the other end of the supporting shaft is sleeved with the first rolling bearing and inserted into the fin to be connected with the fin. The rotating shaft assembly comprises a rotating shaft; the rotating shaft coaxially penetrates through the interior of the supporting shaft, one end of the rotating shaft is coaxially connected with the fin, the other end of the rotating shaft is connected with the rotating vane oil cylinder installed on the supporting shaft, and the rotating vane oil cylinder drives the fin to coaxially rotate through the rotating shaft. Meanwhile, the end of the rotating shaft is connected with a fin angle feedback device installed on the rotating vane oil cylinder, and the fin angle feedback device is used for detecting the angle displacement of the fin and feeding back the angle displacement to the control system. According to the full-speed fin stabilizer, a traditional fin base and an executing mechanism supporting base are integrated, the rotating vane oil cylinder is introduced, and the requirements of the full-speed fin stabilizer which is small in occupied space and large in rotating angle can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of fin stabilizers, and particularly relates to a full-speed fin stabilizer without occupying hold space, which is particularly suitable for ships with limited hold space. Background Art

[0002] Existing full-speed fin stabilizers generally consist of a fin base, an actuator, fins, etc. The fin base is welded to the hull and can be regarded as a part of the hull. A relatively high fin base height is left for butt welding with the hull. The actuator mainly consists of a support base, a sealing device, an oil distribution valve plate group, a fin shank group, a fin shaft group, a fin turning oil cylinder, a locking mechanism, a fin angle transmitter, etc., which are installed on the fin base and connected by bolts. The fin shaft is supported on the support base by two tapered roller bearings of different sizes. The outer end of the fin shaft is integrally connected with the fin through taper fit and key connection. The hydrodynamic force generated on the fin is transmitted to the support base through the fin shaft. All components are supported on the support base. The fin shank rigidly connects the linear hydraulic cylinder and the rotating shaft, and the fin shank and the fin shaft are fixedly connected into one body through a double key. The piston rod of the fin turning oil cylinder is hinged to the fin shank through a fin shank pin. The fin turning oil cylinder is supported on the support base through an oil cylinder hinge shaft and a spherical plain bearing, forming a hinge connection. When turning the fin, the rodless chambers and the rod chambers of the left and right fin turning oil cylinders are respectively supplied with oil, generating thrust and pulling force respectively, pushing and pulling the fin shank to form a couple, thereby driving the fin shaft to rotate and realizing the fin turning function.

[0003] To ensure the installation of the fin shank group, the fin turning oil cylinder, the locking mechanism, the fin angle transmitter, etc., the actuator needs to be designed with sufficient height. Due to the height of the fin base and the support base, the fin stabilizer occupies a large amount of hold space, bringing difficulties to the layout of the limited hold space. Moreover, the fin stabilizer is limited by the driving structure of the crank and connecting rod used in its actuator, and the maximum fin turning working angle that can be achieved is only ±40°, which cannot provide a larger fin turning angle and a faster fin turning speed for the zero-speed fin stabilizer device, and cannot provide a large lift force. In order to meet the requirements of more equipment in the ship hold, less hold space left for the fin stabilizer device, and the need for roll reduction at full speed, especially at zero speed, there is an urgent need for a full-speed fin stabilizer with a small hold occupation and a large turning angle. Summary of the Invention

[0004] To meet the requirements of a full-speed fin stabilizer with a small hold occupation and a large turning angle, the present invention provides a full-speed fin stabilizer without occupying hold space, which introduces a rotary vane oil cylinder to drive the fin shaft to swing, and realizes large-angle swing by setting the sizes of the moving vane and the fixed vane of the rotary vane oil cylinder. By integrating the traditional fin base and the support base of the actuator, the new support base assembly is welded to the outer end of the hull, reducing the size of the machinery space in the hold. By setting rolling bearings in the fin, the fin can be turned under the drive of the rotary vane oil cylinder.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A full-speed stabilizer fin without occupying hold space, the stabilizer fin comprising a fin angle feedback device, a rotary vane oil cylinder, a support seat assembly, a rotating shaft assembly, and a fin;

[0007] The support seat assembly includes a support shaft and a first rolling bearing; the support shaft is of a hollow shaft structure, one end is fixed on the hull, the other end of the support shaft is sleeved with the first rolling bearing and inserted into the fin and connected to the fin, and the first rolling bearing is used to support the fin;

[0008] The rotating shaft assembly includes a rotating shaft; the rotating shaft coaxially passes through the inside of the support shaft, one end is coaxially connected to the fin, the other end is connected to the rotary vane oil cylinder installed on the support shaft, and the rotary vane oil cylinder drives the fin to rotate coaxially through the rotating shaft; at the same time, the end of the rotating shaft is connected to the fin angle feedback device installed on the rotary vane oil cylinder, and the fin angle feedback device is used to detect the angular displacement of the fin and feedback it to the control system.

[0009] Further, the rotary vane oil cylinder includes a fixed vane, a moving vane, and a hydraulic system, and the fixed vane and the moving vane are alternately arranged at intervals along the circumferential direction of the central axis of the rotary vane oil cylinder; the moving vane rotates towards the fixed vane under the action of the hydraulic system and drives the fin to rotate through the rotating shaft; the rotary vane oil cylinder adjusts the swing range of the moving vane by replacing the fixed vane and the moving vane with different widths to change the rotation angle range of the fin.

[0010] Further, the stabilizer fin further includes a sealing cover; the support seat assembly further includes a sealing bushing; the sealing bushing is sleeved on the support shaft between the first rolling bearing and the hull; at the port of the fin, the sealing cover is sleeved on the sealing bushing and fixedly connected to the fin.

[0011] Further, the support seat assembly further includes an O-ring; the O-ring is arranged on the sealing bushing.

[0012] Further, the support seat assembly includes a support ring and two of the first rolling bearings; the two first rolling bearings are sleeved on the support shaft at intervals; the support ring is sleeved on the support shaft between the two first rolling bearings.

[0013] Further, the rotating shaft assembly further includes a small round nut and a second rolling bearing; the two second rolling bearings are sleeved on the middle of the rotating shaft at intervals and tightened by the small round nut.

[0014] Further, the fin includes a main shaft sleeve and a fin outer plate; the main shaft sleeve is coaxially fixed inside the fin outer plate along the transverse axis direction of the fin; the main shaft sleeve is sleeved on the support shaft, and the first rolling bearing on the support shaft supports the main shaft sleeve.

[0015] Further, both ends of the rotating shaft have splines; the fin further includes a connecting bolt and a connecting plate, and the connecting plate is arranged at the end of the support shaft inside the fin;

[0016] One end of the rotating shaft is connected to the connecting plate through the spline, and the center of the rotating shaft is connected to the connecting plate through a tension bolt; the other end of the rotating shaft is connected to the central shaft of the swashplate cylinder through the spline and is connected to the transmission structure of the fin angle feedback device through a connecting shaft.

[0017] Further, the main shaft sleeve is a hollow sleeve, and its internal is an inner circular structure.

[0018] Further, the inner diameter of the outer end of the main shaft sleeve is larger than the inner diameter of the inner end.

[0019] Advantages of the present invention:

[0020] The full-speed stabilizer fin without occupied hold space of the present invention changes the traditional method of driving the stabilizer fin by a single shaft and interference fit, and uses a relatively thinner rotating shaft in the center to provide a rotating torque, and the external support seat bears the bending moment perpendicular to the axial direction, so as to avoid using a thicker driving shaft with interference fit.

[0021] The present invention integrates the traditional fin seat and the actuator support seat, and introduces a swashplate cylinder to meet the requirements of the full-speed stabilizer fin with small occupied hold and large rotation angle.

[0022] The fin of the present invention is sleeved on the support seat assembly, and the support shaft assembly bears the bending moment transmitted by the fin. The swashplate cylinder is connected to the fin through the rotating shaft assembly located inside the support shaft assembly. The swashplate cylinder drives the fin to rotate through the rotating shaft. The rotating shaft assembly bears the torque transmitted by the fin. Different from the existing fin shaft of the full-speed stabilizer fin that bears both torque and bending moment at the same time, the present invention bears the bending moment and torque respectively through the support shaft assembly and the rotating shaft assembly. The rotating shaft of the rotating shaft assembly has a reduced shaft diameter and shaft length compared with the existing fin shaft, reduces the requirements for the swashplate cylinder, reduces the occupied space required by the swashplate cylinder, and reduces the internal space of the machinery compartment.

[0023] In addition, the present invention can separately design and process the support shaft assembly and the rotating shaft assembly according to requirements, and separately replace each part, which not only helps to improve the performance of each component, but also can reduce the maintenance cost.

[0024] The present invention realizes the installation of fins and rotary vane cylinders through a support seat assembly. The support seat assembly is welded to the outer end of the ship's hull. The fins do not need to be welded to the hull through fin seats, which facilitates disassembly and assembly. The rotating shaft assembly is arranged inside the support seat assembly, without occupying the internal space of the machinery and equipment compartment. There is no need to expand the internal space of the machinery and equipment compartment to meet the design of the fin stabilizer's actuator, fin seat, and support seat, simplifying the internal structure of the machinery and equipment compartment, making the internal structure more compact, and reducing the size of the machinery and equipment compartment. At the same time, since the present invention integrates the traditional fin seat and actuator support seat, the weight of the fin stabilizer device is reduced. Through tests, the weight of the support seat assembly is reduced by 40% compared to the total weight of the original support seat (actuator support seat + fin seat). In addition, the support seat assembly integrates and manufactures the original fin seat, hull reinforcement, and ship's outer plate, etc. During installation on the ship, it only needs to be butt-welded to the ship's outer plate, without bolt connection and reaming operation. The present invention can transfer a large amount of work to the equipment manufacturing stage, improving the installation efficiency of the shipyard.

[0025] The inner hole of the main shaft sleeve of the fin of the present invention and the outer end of the rotating shaft are processed from the existing taper to roundness (i.e., the rotating shaft adopts a cylindrical structure). Under the condition of ensuring the consistency of the inner hole of the main shaft sleeve, it can be combined and installed with fins of various different areas to meet the needs of various ships, and the product interchangeability is strong. The fin shaft of the existing full-speed fin stabilizer needs to be connected to the fin in an interference fit manner, and taper scraping is required during assembly to ensure the assembly accuracy. However, the present invention can improve the assembly accuracy by ensuring the processing accuracy during the processing of parts, canceling the taper scraping between the fin and the outer end of the fin shaft, reducing the workload of taper scraping, and being able to save costs (the scraping working hours for each pair of fin stabilizers are reduced by about 300h). The traditional fin stabilizer drive shaft using an interference fit manner has extremely high requirements for the processing technology. Any error will affect the firmness of the interference fit, and it must be replaced as a whole when replacing.

[0026] The present invention drives the fin to rotate coaxially through the central axis and rotating shaft of the rotary vane cylinder, reducing the limitation of the maximum fin rotation working angle caused by the crank and connecting rod of the fin stabilizer, which is beneficial to increasing the fin rotation angle. The present invention adjusts the width dimensions of the moving vane and fixed vane in the rotary vane cylinder to change the range of rotation of the moving vane towards the fixed vane, thereby realizing large-angle swing of the fin. Under the condition of meeting the strength of the moving vane and fixed vane, the rotation angle of the fin can reach ±65°. Description of the Drawings

[0027] Figure 1 It is a schematic installation diagram of the full-speed fin stabilizer without occupying the cabin space of the present invention;

[0028] Figure 2 It is a schematic diagram of the support seat assembly in the present invention;

[0029] Figure 3 It is a schematic diagram of the rotating shaft assembly in the present invention;

[0030] Figure 4 Schematic diagram of the tension bolt structure in the present invention;

[0031] Figure 5 Schematic diagram of the fin structure in the present invention;

[0032] Figure 6 Geometric shape diagram of the fin in the present invention;

[0033] Figure 7 Geometric shape diagram of the rotary vane oil cylinder in the present invention.

[0034] Wherein: 1 - fin angle feedback device, 2 - rotary vane oil cylinder, 2.1 - fixed vane, 2.2 - moving vane, 3 - support seat assembly, 3.1 - support shaft, 3.2 - sealing bushing, 3.3 - first rolling bearing, 3.4 - support ring, 3.5 - O-ring, 4 - rotating shaft assembly, 4.1 - rotating shaft, 4.2 - small round nut, 4.3 - second rolling bearing, 5 - sealing cover, 6 - fin, 6.1 - main shaft sleeve, 6.2 - fin outer plate, 6.3 - connecting bolt, 6.4 - connecting plate, 7 - hull, 8 - tension bolt. Specific embodiments

[0035] The following combines the description of the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are only used to illustrate the present invention, but not to limit the scope of the present invention.

[0036] The terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. in this application document are based on the orientation or position relationship shown in the drawings. If the drawings are different, the corresponding position relationship may also change accordingly. Therefore, it should not be understood as a limitation of the protection scope.

[0037] In the present invention, the terms "installation", "connection", "engagement", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection or a connection that can communicate with each other, a direct connection, an indirect connection through an intermediate medium, a connection inside two components, or an interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] This embodiment describes a full-speed stabilizer fin without occupying cabin space, which integrates the traditional fin seat and the actuator support seat into one, reduces the size inside the machinery cabin, and introduces a rotary vane oil cylinder to achieve large-angle swing of the fin.

[0039] As Figure 1As shown in the figure, the full-speed fin stabilizer mainly consists of a fin angle feedback device 1, a rotary vane oil cylinder 2, a support seat assembly 3, a rotating shaft assembly 4, a sealing cover 5, a fin 6, a tension bolt 8, etc. One end of the support seat assembly 3 is welded and fixed on the outer plate of the hull 7, and the other end extends outside the hull 7, and the fin 6 is installed on the support seat assembly 3. The rotating shaft assembly 4 is placed inside the support seat assembly 3, one end of which passes through the support seat assembly 3 and is connected to the rotary vane oil cylinder 2 and is connected to the transmission structure of the fin angle feedback device 1. The fin angle feedback device 1 is fixedly connected to the rotary vane oil cylinder 2 through the fin angle feedback device mounting seat, converts the linear displacement of the rotary vane oil cylinder 2 into an angular displacement, and feeds it back to the control system. The other end of the rotating shaft assembly 4 is fixedly connected to the fin 6, driving the fin 6 to rotate together. The sealing cover 5 at the port of the fin 6 is sleeved on the support seat assembly 3 and is installed on the fin 6 through bolts to close the gap between the fin 6 and the support seat assembly 3.

[0040] The support seat assembly 3 of this embodiment is as Figure 2 shown and includes a support shaft 3.1, a sealing bushing 3.2, a first rolling bearing 3.3, a support ring 3.4 and an O-ring 3.5.

[0041] The support shaft 3.1 is of a hollow shaft structure, which consists of a fixed part and a support part, and the outer diameter of the fixed part is larger than that of the support part. The fixed part of the support shaft 3.1 is fixed on the outer plate of the hull 7 by welding, the support part extends outside the hull 7, and the outer end of the support part abuts against the connecting plate 6.4 inside the fin 6. Two first rolling bearings 3.3 are spacedly sleeved on the support part of the support shaft 3.1 for supporting the fin 6. The support ring 3.4 is sleeved on the support shaft 3.1 between the two first rolling bearings 3.3, and the support ring 3.4 is used to adjust the distance between the two first rolling bearings 3.3 to ensure that the fin 6 is installed in place. When the rotary vane oil cylinder 2 rotates under hydraulic drive, the rotary vane oil cylinder 2 drives the fin 6 to rotate through the rotating shaft 4.1. When the ship advances at a certain speed, a lift force P y and a resistance force P x will be generated on the fin 6, and the lift force and the resistance force will be transmitted to the support shaft 3.1 through the first rolling bearing 3.3, and the support shaft 3.1 will transmit the bending moment load generated by the lift force and the resistance force of the fin 6 to the hull 7. In this embodiment, to ensure the support strength of the hull 7 for the support seat assembly 3, the hull 7 can be T-shaped strengthened at the installation position of the support seat assembly 3.

[0042] A sealing bushing 3.2 is sleeved on the support shaft 3.1 between the first rolling bearing 3.3 close to the hull 7 and the fixing part of the support shaft 3.1, and an O-ring 3.5 is arranged on the sealing bushing 3.2. A sealing cover 5 is sleeved on the sealing bushing 3.2 and forms a friction pair with the sealing bushing 3.2 through the O-ring 3.5. The compression amount generated by the extrusion of the O-ring 3.5 maintains the sealing ability, preventing seawater from entering the fin 6 and also preventing the lubricating grease in the first rolling bearing 3.3 from flowing out. The sealing bushing 3.2 in this embodiment is generally made of seawater-resistant material.

[0043] The rotating shaft assembly 4 is as Figure 3 shown and includes a rotating shaft 4.1, a small round nut 4.2, and a second rolling bearing 4.3. The middle part of the rotating shaft 4.1 is a smooth shaft, and splines are provided at both ends respectively. And the outer diameter of the middle part of the rotating shaft 4.1 is larger than the outer diameters of both ends. One end of the rotating shaft 4.1 is fixedly connected to the rotor of the vane cylinder 2 through splines, bearing the torque generated by the vane cylinder 2, and is connected to the transmission structure of the fin angle feedback device 1 through a connecting shaft. The connecting shaft rotates together with the rotating shaft 4.1 to realize the detection of the fin angle by the fin angle feedback device 1. The other end of the rotating shaft 4.1 is positioned and connected to the connecting plate 6.4 through splines, transmitting the torque generated by the vane cylinder 2 to the fin 6, and then driving the fin 6 to rotate. And the center of the rotating shaft 4.1 is fixedly connected to the connecting plate 6.4 through a tension bolt 8 (see Figure 4 ) to prevent relative movement between the rotating shaft 4.1 and the fin 6. Two second rolling bearings 4.3 are sleeved on the middle part of the rotating shaft 4.1 at intervals for supporting the support seat assembly 3. A small round nut 4.2 is sleeved on the rotating shaft 4.1 at the outer ends of the two second rolling bearings 4.3, and the second rolling bearings 4.3 are tightened by the small round nut 4.2 to ensure the axial clearance of the two second rolling bearings 4.3.

[0044] The fin 6 in this embodiment is as Figure 5 shown and is composed of a main shaft sleeve 6.1, a fin outer plate 6.2, a connecting bolt 6.3, and a connecting plate 6.4. Along the transverse axis of the fin 6, the main shaft sleeve 6.1 is coaxially fixed inside the port of the fin outer plate 6.2. The main shaft sleeve 6.1 in this embodiment is a hollow sleeve, and its internal is an inner circular structure, which is different from the traditional taper structure form, facilitating assembly and having low processing difficulty. The inner circular structure of the main shaft sleeve 6.1 is a stepped inner hole, and the inner diameter in the middle is smaller than the inner diameter at the end. The inner diameters at both ends inside the main shaft sleeve 6.1 are matched with the first rolling bearing 3.3, and the first rolling bearing 3.3 on the support shaft 3.1 supports the main shaft sleeve 6.1. The inner diameter a at the outer end of the main shaft sleeve 6.1 is larger than the inner diameter b at the inner end, facilitating the installation of the fin 6 from the outside towards the hull 7. The fin 6 rotates around the support shaft 3.1 through the first rolling bearing 3.3.

[0045] The fin outer plate 6.2 in this embodiment takes the transverse axis (i.e., Figure 6The O-O axis (which is perpendicular to the longitudinal axis of the ship) is symmetrically arranged up and down with the center as the center, and the cross-sectional shape of the horizontal axis is a streamlined airfoil section, which has good hydrodynamic performance. Moreover, the longitudinal cross-sectional shape of the fin outer plate 6.2 is trapezoidal, rectangular or other shapes.

[0046] Inside the fin 6, the connecting plate 6.4 is fixed to the inner end of the main shaft sleeve 6.1 by a plurality of connecting bolts 6.3. In this embodiment, for the convenience of installing the bolts inside the fin 6, an installation window can be reserved on the fin 6, and the installation window can be closed after the connection of the support seat assembly 3, the rotating shaft assembly 4 and the fin 6 is completed.

[0047] The rotary vane cylinder 2 is installed on the support shaft 3.1 of the support seat assembly 3 by bolts. As Figure 7 shown, the rotary vane cylinder 2 includes a cylinder block and a hydraulic system. The inside of the cylinder block includes a central shaft, fixed vanes 2.1, and moving vanes 2.2. One or more fixed vanes 2.1 are fixedly installed on the inner side of the cylinder block of the rotary vane cylinder 2, and the blade direction is inward. One or more moving vanes 2.2 are installed around the outside of the central shaft of the rotary vane cylinder 2, and the blade direction is outward. The hydraulic oil of the hydraulic system is filled in the space between the fixed vanes 2.1 and the moving vanes 2.2.

[0048] The central shaft has an internal spline at its center, which matches the spline at the end of the rotating shaft 4.1, realizing the spline connection between the rotary vane cylinder 2 and the rotating shaft 4.1. The hydraulic system can inject hydraulic oil into the gap between the fixed vanes 2.1 and the moving vanes 2.2 respectively. By pushing the moving vanes 2.2 to rotate towards the fixed vanes 2.1 with the hydraulic oil, at the same time, the moving vanes 2.2 drive the rotating shaft 4.1 to rotate synchronously through the central shaft. Along the circumferential direction of the central shaft, the fixed vanes 2.1 and the moving vanes 2.2 are arranged alternately, and the number of the fixed vanes 2.1 and the moving vanes 2.2 is the same and arranged at intervals. By injecting and discharging hydraulic oil into different spaces, the rotation direction of the moving vanes 2.2 can be controlled, that is, the rotation of the central shaft is controlled, and the central shaft drives the rotating shaft 4.1 to rotate synchronously. In this embodiment, by replacing the fixed vanes 2.1 and the moving vanes 2.2 with different widths and adjusting the interval between the fixed vanes 2.1 and the moving vanes 2.2, the included angle between the fixed vanes 2.1 and the moving vanes 2.2 can be changed, so as to change the rotation range of the moving vanes 2.2 to achieve large-angle swing of the fin 6.

[0049] As shown in this embodiment, two fixed vanes 2.1 and two moving vanes 2.2 are arranged alternately at intervals. The two moving vanes 2.2 are spaced 180 degrees from each other and symmetrically installed; the fixed vanes 2.1 are symmetrically installed at intervals of 180 degrees from each other. The moving vanes 2.2 drive the rotating shaft 4.1 to rotate through the spline, and then drive the fin 6 to rotate, so that the rotation angle of the fin 6 can reach ±65°.

[0050] After the full-speed stabilizer fins of this embodiment are symmetrically installed on the hulls on both sides of the ship, the lift forces of the fins on both sides are controlled to be equal in magnitude and opposite in direction. The righting moment generated by the lift forces of the two fins on the ship and the disturbing moment of the waves are guaranteed to be of opposite polarities, so that the rolling of the ship caused by the waves can be actively counteracted, and the rolling of the ship is greatly reduced.

[0051] Although the principle of the present invention has been described in detail above in connection with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are only explanations of the illustrative implementation modes of the present invention and do not limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple substitutions based on the technical solutions of the present invention all fall within the protection scope of the present invention.

Claims

1. A full-speed stabilizing fin without occupying cabin space, characterized in that: The fin stabilizer comprises a fin angle feedback device (1), a vane rotating cylinder (2), a support seat assembly (3), a rotating shaft assembly (4), and a fin (6); The support seat assembly (3) comprises a support shaft (3.1) and a first rolling bearing (3.3); the support shaft (3.1) is a hollow shaft structure, one end of which is fixed on the hull (7); the other end of the support shaft (3.1) is fitted with the first rolling bearing (3.3) and is inserted into the fin (6) to be connected to the fin (6); the first rolling bearing (3.3) is used to support the fin (6); The rotating shaft assembly (4) comprises a rotating shaft (4.1); the rotating shaft (4.1) coaxially passes through the interior of the supporting shaft (3.1), one end of which is coaxially connected to the fin (6), and the other end of which is connected to the vane-turning cylinder (2) mounted on the supporting shaft (3.1); the vane-turning cylinder (2) drives the fin (6) to coaxially rotate through the rotating shaft (4.1); at the same time, the end of the rotating shaft (4.1) is connected to the fin angle feedback device (1) mounted on the vane-turning cylinder (2); the fin angle feedback device (1) is used to detect the angular displacement of the fin (6) and feed it back to the control system.

2. The full-speed stabilizer fin without occupying cabin space according to claim 1, characterized in that: The vane-turning cylinder (2) comprises fixed blades (2.1), movable blades (2.2) and a hydraulic system, wherein the fixed blades (2.1) and the movable blades (2.2) are arranged alternately and spaced along the circumferential direction of the central axis of the vane-turning cylinder (2); the movable blades (2.2) rotate in the direction of the fixed blades (2.1) under the action of the hydraulic system, and drive the fins (6) to rotate through the rotating shaft (4.1); the vane-turning cylinder (2) adjusts the swing range of the movable blades (2.2) by replacing the fixed blades (2.1) and the movable blades (2.2) of different widths, thereby changing the rotation angle range of the fins (6).

3. The full-speed stabilizer fin without occupying cabin space according to claim 1, characterized in that: The anti-roll fin also includes a sealing cover (5); the support seat assembly (3) also includes a sealing bushing (3.2); the sealing bushing (3.2) is sleeved on the support shaft (3.1) between the first rolling bearing (3.3) and the hull (7); the sealing cover (5) is sleeved on the sealing bushing (3.2) at the port of the fin (6) and is fixedly connected to the fin (6).

4. The full-speed stabilizer fin without occupying cabin space according to claim 3, characterized in that: The support seat assembly (3) further comprises an O-ring (3.5); the O-ring (3.5) is arranged on the sealing bushing (3.2).

5. The full-speed stabilizer fin without occupying cabin space according to claim 1, characterized in that: The support seat assembly (3) comprises a support ring (3.4) and two first rolling bearings (3.3); the two first rolling bearings (3.3) are sleeved on the support shaft (3.1) at intervals; and the support ring (3.4) is sleeved on the support shaft (3.1) between the two first rolling bearings (3.3).

6. The full-speed stabilizer fin without occupying cabin space according to claim 1, characterized in that: The rotating shaft assembly (4) further comprises a small round nut (4.2) and a second rolling bearing (4.3); two of the second rolling bearings (4.3) are spaced apart and sleeved on the middle of the rotating shaft (4.1) and are tightened by the small round nut (4.2).

7. The full-speed stabilizer fin without occupying cabin space according to claim 1, characterized in that: The fin (6) comprises a main shaft sleeve (6.1) and a fin outer plate (6.2); the main shaft sleeve (6.1) is coaxially fixed inside the fin outer plate (6.2) along the transverse axis direction of the fin (6); the main shaft sleeve (6.1) is sleeved on the support shaft (3.1), and the first rolling bearing (3.3) on the support shaft (3.1) supports the main shaft sleeve (6.1).

8. The full-speed stabilizer fin without occupying cabin space according to claim 7, characterized in that: Both ends of the rotating shaft (4.1) are respectively provided with splines; the fin (6) further comprises a connecting bolt (6.3) and a connecting plate (6.4), and the connecting plate (6.4) is arranged at the end of the supporting shaft (3.1) in the fin (6); One end of the rotating shaft (4.1) is connected to the connecting plate (6.4) via the spline, and the center of the rotating shaft (4.1) is connected to the connecting plate (6.4) via a tensioning bolt (8); the other end of the rotating shaft (4.1) is connected to the central axis of the vane cylinder (2) via the spline, and is connected to the transmission structure of the fin angle feedback device (1) via a connecting shaft.

9. The full-speed stabilizer fin without occupying cabin space according to claim 7, characterized in that: The main shaft sleeve (6.1) is a hollow sleeve, the interior of which is an inner circular structure.

10. The full-speed stabilizer fin without occupying cabin space according to claim 9, characterized in that: The inner diameter of the outer end of the main shaft sleeve (6.1) is larger than the inner diameter of the inner end.

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