A full-speed fin stabilizer that does not occupy cabin space

Abstract

The present invention relates to a full-speed stabilizer fin that does not occupy cabin space, belonging to the technical field of fin stabilizers. The fin stabilizer comprises a fin angle feedback device, a rotary cylinder, a support seat assembly, a rotating shaft assembly, and a fin. The support seat assembly comprises a support shaft and a first rolling bearing. The support shaft is a hollow shaft structure, one end of which is fixed to the hull, and the other end of the support shaft is fitted with the first rolling bearing and inserted into the fin to connect with the fin. The rotating shaft assembly comprises a rotating shaft, which coaxially passes through the interior of the support shaft, one end of which is coaxially connected to the fin, and the other end is connected to a rotary cylinder mounted on the support shaft. The rotary cylinder drives the fin to rotate coaxially via the rotating shaft. At the same time, the end of the rotating shaft is connected to a fin angle feedback device mounted on the rotary cylinder. The fin angle feedback device is used to detect the angular displacement of the fin and provide feedback to the control system. The present invention integrates the traditional fin seat and actuator support seat and introduces the rotary cylinder, which can meet the requirements of a full-speed stabilizer fin that occupies a small cabin space and has a large rotation angle.

Description

Technical Field

[0001] The present invention relates to the technical field of fin stabilizers, and in particular to a full-speed fin stabilizer that does not occupy cabin space and is particularly suitable for use on ships with limited cabin space. Background Art

[0002] Existing full-speed anti-roll fins generally consist of a fin seat, an actuator, a fin, etc. The fin seat is welded to the hull and can be considered as part of the hull. A higher fin seat height is left for butt welding with the hull. The actuator mainly consists of a support seat, a sealing device, an oil distribution valve plate assembly, a fin handle assembly, a fin shaft assembly, a fin rotation cylinder, a locking mechanism, a fin angle transmitter, etc., which is installed on the fin seat and connected by bolts. The fin shaft is supported on the support seat by two large and small tapered roller bearings. The outer end of the fin shaft is connected to the fin through a taper fit and a key connection. The fluid force generated on the fin is transmitted to the support seat through the fin shaft. All components are supported on the support seat. The fin handle rigidly connects the linear hydraulic cylinder to the rotating shaft. The fin handle and the fin shaft are fixed together by a double key. The piston rod of the fin rotation cylinder and the fin handle are hinged by a fin handle pin. The fin-turning cylinder is supported on the support seat through the cylinder hinge shaft and the spherical bearing to form a hinge connection. When the fins are turned, oil is respectively supplied to the rod chamber and the rodless chamber of the left and right fin-turning cylinders, generating thrust and pulling forces respectively, pushing and pulling the fin handle to form a force couple, thereby driving the fin shaft to rotate and realizing the fin-turning function.

[0003] In order to ensure the installation of the fin handle group, fin turning cylinder, locking mechanism, fin angle transmitter, etc., the actuator needs to be designed with sufficient height. Due to the height of the fin seat and the support seat, the fin stabilizer needs to occupy a large amount of cabin space, which brings difficulties to the layout of the limited cabin space. In addition, the fin stabilizer is limited by the fact that its actuator adopts a crank-connecting rod drive structure, and the maximum fin turning angle that can be achieved is only ±40°, which cannot provide a larger fin turning angle and faster fin turning speed for the zero-speed fin stabilizer device, and cannot provide a larger lift. In order to meet the needs of more equipment in the ship cabin, the cabin space left for the fin stabilizer device is small, and the need for anti-roll at full speed, especially zero speed, is required. There is an urgent need for a full-speed fin stabilizer with a small cabin occupancy and a large turning angle. Summary of the Invention

[0004] To meet the demand for a full-speed fin stabilizer with a small footprint and wide rotation angle, this invention provides a space-saving, full-speed fin stabilizer. This system incorporates a rotary cylinder to drive the fin shaft. Large-angle rotation is achieved by adjusting the size of the cylinder's moving and fixed blades. By integrating the traditional fin mount with the actuator support, and welding a new support assembly to the outer end of the hull, the dimensions of the machinery compartment are reduced. Rolling bearings are incorporated into the fin, enabling the fin to rotate under the drive of the rotary cylinder.

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

[0006] A full-speed fin stabilizer that does not occupy cabin space, the fin stabilizer comprising a fin angle feedback device, a blade rotation 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 a hollow shaft structure, one end of which is fixed to the hull, and the other end of the support shaft is fitted with the first rolling bearing and inserted into the fin to be 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 interior of the support shaft, one end of the rotating shaft is coaxially connected to the fin, and the other end is connected to the vane rotary cylinder installed on the support shaft, and the vane rotary 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 vane rotary cylinder, and the fin angle feedback device is used to detect the angular displacement of the fin and feed it back to the control system.

[0009] Furthermore, the vane turning cylinder includes fixed blades, movable blades and a hydraulic system, and the fixed blades and the movable blades are alternately arranged along the circumferential direction of the central axis of the vane turning cylinder; the movable blades rotate toward the stator blades under the action of the hydraulic system, and drive the fins to rotate through the rotating shaft; the vane turning cylinder adjusts the swing range of the movable blades by replacing the stator blades and the movable blades of different widths to change the rotation angle range of the fin.

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

[0011] Furthermore, the support seat assembly also includes an O-ring; the O-ring is arranged on the sealing sleeve.

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

[0013] Furthermore, the rotating shaft assembly also includes a small round nut and a second rolling bearing; two of the second rolling bearings are spaced apart and sleeved on the middle of the rotating shaft and are tightened by the small round nut.

[0014] Furthermore, the fin includes a main shaft sleeve and a fin outer plate; the main shaft sleeve is coaxially fixed in 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] Furthermore, both ends of the rotating shaft are provided with splines; the fin further comprises a connecting bolt and a connecting plate, and the connecting plate is provided at the end of the supporting shaft in 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 tightening bolt; the other end of the rotating shaft is connected to the central axis of the vane cylinder through the spline, and is connected to the transmission structure of the fin angle feedback device through a connecting shaft.

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

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

[0019] Beneficial effects of the present invention:

[0020] The full-speed stabilizer fin of the present invention, which does not occupy cabin space, changes the traditional method of driving the stabilizer fin through a single shaft and interference fit. It adopts a relatively thinner central rotating shaft to provide rotational torque, and uses an external support seat to bear the bending moment perpendicular to the axial direction, thereby avoiding the use of a relatively thick interference fit drive shaft.

[0021] The present invention integrates the traditional fin seat and the actuator support seat and introduces a vane-turning oil cylinder to meet the requirements of a full-speed anti-roll fin with a small cabin space and a large turning angle.

[0022] The fin of the present invention is mounted on a support seat assembly, and the support shaft assembly bears the bending moment transmitted by the fin. The blade turning cylinder is connected to the fin through a rotating shaft assembly located in the support shaft assembly. The blade turning cylinder drives the fin to rotate through the rotating shaft, and the rotating shaft assembly bears the torque transmitted by the fin. This is different from the existing full-speed anti-roll fin in which the fin shaft bears torque and bending moment at the same time. The present invention bears bending moment and torque respectively through the support shaft assembly and the rotating shaft assembly. Compared with the existing fin shaft, the rotating shaft of the rotating shaft assembly has a reduced shaft diameter and shaft length, which reduces the requirements for the blade turning cylinder, reduces the space required for the blade turning cylinder, and reduces the internal space of the machinery compartment.

[0023] In addition, the present invention can design and process the support shaft assembly and the rotating shaft assembly separately as needed, and replace each part separately, which not only helps to improve the performance of each assembly, but also reduces maintenance costs.

[0024] The present invention achieves the installation of the fins and rotor cylinders through a support seat assembly. The support seat assembly is welded to the outer end of the hull. The fins do not need to be welded to the hull through the fin seat, making it easy to disassemble and assemble. The rotating shaft assembly is arranged inside the support seat assembly, eliminating the need to occupy the internal space of the mechanical equipment compartment. The mechanical equipment compartment does not need to expand the cabin space to accommodate the design of the actuator, fin seat, and support seat of the anti-roll fin. This simplifies the internal structure of the mechanical equipment compartment, making the cabin structure more compact and reducing the size of the mechanical equipment compartment. At the same time, because the present invention integrates the traditional fin seat and the actuator support seat, the weight of the anti-roll fin device is reduced. According to tests, the weight of the support seat assembly is 40% less than 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, hull outer plate, etc. During installation on the ship, it only needs to be welded to the hull outer plate, without bolt connection and without the need for reaming. The present invention can transfer a large amount of work from the shipyard to the equipment manufacturing stage, improving the shipyard installation efficiency.

[0025] The inner hole of the main shaft sleeve and the outer end of the rotating shaft of the fin of the present invention are changed from the existing taper processing to roundness processing (that is, the rotating shaft adopts a cylindrical structure). While 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 has strong interchangeability. The fin shaft of the existing full-speed anti-roll fin needs to be connected to the fin in an interference fit manner, and a taper fit is required during assembly to ensure assembly accuracy. The present invention can improve assembly accuracy by ensuring processing accuracy during component processing, eliminates the taper fit between the fin and the outer end of the fin shaft, reduces the workload of taper fit, and can save costs (the working hours for fitting each pair of anti-roll fins are reduced by about 300 hours). The traditional anti-roll fin drive shaft using an interference fit method has extremely high requirements for the processing technology. Any error will affect the firmness of the interference fit, and the entire unit must be replaced when replaced.

[0026] The present invention utilizes the coaxial rotation of the fins by the central axis and the rotating shaft of the rotating cylinder, reducing the maximum fin rotation angle limitation imposed by the crank connecting rod, thereby increasing the fin rotation angle. By adjusting the width of the moving and stator blades within the rotating cylinder, the present invention changes the range of rotation of the moving blades toward the stator blades, thereby achieving wide fin swing angles. While maintaining the required strength of the moving and stator blades, the fin rotation angle can reach ±65°. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0029] Figure 3 Schematic diagram of the rotating shaft assembly in the present invention;

[0030] Figure 4 This is a 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 is a diagram showing the geometric shape of the fin in the present invention;

[0033] Figure 7 This is a diagram of the geometric shape of the rotary blade cylinder in the present invention.

[0034] Among them: 1-fin angle feedback device, 2-rotating blade cylinder, 2.1-fixed blade, 2.2-moving blade, 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-spindle sleeve, 6.2-fin outer plate, 6.3-connecting bolt, 6.4-connecting plate, 7-hull, 8-tensioning bolt. DETAILED DESCRIPTION

[0035] The following embodiments are further described in detail with reference to the accompanying drawings and examples. The following embodiments are only used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] Terms such as "upper," "lower," "left," "right," "inner," "outer," "front," "back," "head," and "tail" in this application are based on the directions or positions shown in the accompanying drawings. The corresponding positions may vary depending on the drawings, and should not be construed as limiting the scope of protection.

[0037] In the present invention, the terms "installed," "connected," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, integral connection, mechanical connection, electrical connection, or mutual communication. They may be directly connected or indirectly connected through an intermediate medium. They may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] This embodiment describes a full-speed stabilizer fin that does not occupy cabin space. It integrates the traditional fin seat and the actuator support seat into one, reduces the size of the mechanical equipment cabin, and introduces a rotary vane cylinder to achieve large-angle swing of the fin.

[0039] like Figure 1As shown, the full-speed anti-roll fin mainly consists of a fin angle feedback device 1, a rotary blade cylinder 2, a support seat assembly 3, a rotating shaft assembly 4, a sealing cover 5, a fin 6 and a tension bolt 8. One end of the support seat assembly 3 is welded and fixed to the outer plate of the hull 7, and the other end extends to the outside of the hull 7, and the fin 6 is installed on the support seat assembly 3. The rotating shaft assembly 4 is placed in the support seat assembly 3, and one end thereof passes through the support seat assembly 3 and is connected to the rotary blade 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 blade cylinder 2 through the fin angle feedback device mounting seat, converts the linear displacement of the rotary blade cylinder 2 into angular displacement, and feeds 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 mounted on the support seat assembly 3 and is installed on the fin 6 by bolts to close the gap between the fin 6 and the support seat assembly 3.

[0040] The support base assembly 3 of this embodiment is as follows Figure 2 The shown structure 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 a hollow shaft structure, which consists of a fixed part and a supporting part, and the outer diameter of the fixed part is larger than the outer diameter of the supporting part. The fixed part of the support shaft 3.1 is fixed to the outer plate of the hull 7 by welding, and the supporting part extends to the outside of the hull 7, and the outer end of the supporting part is against the connecting plate 6.4 in the fin 6. Two first rolling bearings 3.3 are spaced apart on the supporting part of the support shaft 3.1 to support the fin 6. A support ring 3.4 is mounted 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 vane cylinder 2 rotates under hydraulic drive, the vane cylinder 2 drives the fin 6 to rotate through the rotating shaft 4.1. When the ship moves forward at a certain speed, a lift P is generated on the fin 6. y and resistance P x The lift and drag are transmitted to the support shaft 3.1 via the first rolling bearing 3.3. The support shaft 3.1 transmits the lift generated by the fin 6 and the bending moment load caused by the drag to the hull 7. In this embodiment, to ensure the support strength of the hull 7 on the support base assembly 3, the hull 7 can be reinforced with a T-shaped structure at the location where the support base assembly 3 is installed.

[0042] A sealing sleeve 3.2 is fitted onto support shaft 3.1, between first rolling bearing 3.3 and the fixed portion of support shaft 3.1 near hull 7. An O-ring 3.5 is mounted on sealing sleeve 3.2. A sealing cap 5 fits over sealing sleeve 3.2, forming a friction pair with O-ring 3.5. The compression generated by squeezing the O-ring 3.5 maintains its sealing capability, preventing seawater from entering the interior of fin 6 and also preventing the lubricant in first rolling bearing 3.3 from escaping. In this embodiment, sealing sleeve 3.2 is typically made of a seawater-resistant material.

[0043] The rotating shaft assembly 4 is as follows Figure 3 The figure shows 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 axis, and splines are provided at both ends. The outer diameter of the middle part of the rotating shaft 4.1 is larger than the outer diameters at both ends. One end of the rotating shaft 4.1 is fixedly connected to the rotor of the vane cylinder 2 through a spline, and bears the torque generated by the vane cylinder 2. It is also 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 a spline, which transmits the torque generated by the vane cylinder 2 to the fin 6, thereby driving the fin 6 to rotate, and the center of the rotating shaft 4.1 is tightened by the tension bolt 8 (see Figure 4 ) is fixedly connected to the connecting plate 6.4 to prevent movement between the rotating shaft 4.1 and the fin 6. Two second rolling bearings 4.3 are spaced apart and mounted in the middle of the rotating shaft 4.1 to support the support base assembly 3. Small round nuts 4.2 are mounted on the outer ends of the two second rolling bearings 4.3 and mounted on the rotating shaft 4.1. The second rolling bearings 4.3 are tightened through the small round nuts 4.2 to ensure axial clearance between the two second rolling bearings 4.3.

[0044] The fin 6 of this embodiment is as follows Figure 5 As shown, it consists of a main shaft sleeve 6.1, a fin outer plate 6.2, a connecting bolt 6.3 and a connecting plate 6.4. The main shaft sleeve 6.1 is coaxially fixed in the port of the fin outer plate 6.2 along the horizontal axis direction of the fin 6. The main shaft sleeve 6.1 of this embodiment is a hollow sleeve, and its interior is an inner circle structure, which is different from the traditional tapered structure, is easy to assemble, and has low processing difficulty. The inner circle 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 of the two ends of the main shaft sleeve 6.1 cooperate 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 of the outer end of the main shaft sleeve 6.1 is larger than the inner diameter b of the inner end, which facilitates the installation of the fin 6 from the outside to 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 of this embodiment is oriented with a horizontal axis (i.e. Figure 6The fin outer plate 6.2 is symmetrical up and down with the center OO axis (which is perpendicular to the long axis of the ship) as the center, and the transverse axis section is a streamlined airfoil section with good fluid dynamic performance, and the longitudinal axis section of the fin outer plate 6.2 is a trapezoidal, rectangular or other shape.

[0046] The connecting plate 6.4 is fixed to the inner end of the main shaft sleeve 6.1 by multiple connecting bolts 6.3 inside the fin 6. In this embodiment, to facilitate the installation of the bolts inside the fin 6, a mounting window can be reserved on the fin 6. After the support base assembly 3, the rotating shaft assembly 4 and the fin 6 are connected, the mounting window can be closed.

[0047] The vane cylinder 2 is mounted on the support shaft 3.1 of the support seat assembly 3 by bolts. Figure 7 As shown, the rotary vane cylinder 2 includes a cylinder body and a hydraulic system. The interior of the cylinder body includes a central axis, stator blades 2.1, and movable blades 2.2. One or more stator blades 2.1 are fixedly installed on the inner side of the cylinder body of the rotary vane cylinder 2, with the blades facing inward. One or more movable blades 2.2 are installed around the outer side of the central axis of the rotary vane cylinder 2, with the blades facing outward. The interval cavity between the stator blades 2.1 and the movable blades 2.2 is filled with hydraulic oil of the hydraulic system.

[0048] The center of the central shaft has an internal spline that mates with the spline at the end of the rotating shaft 4.1, establishing a splined connection between the rotary cylinder 2 and the rotating shaft 4.1. The hydraulic system can inject hydraulic oil into the gaps between the stator blades 2.1 and the movable blades 2.2, respectively. The hydraulic oil propels the movable blades 2.2 toward the stator blades 2.1, while the movable blades 2.2 simultaneously drive the rotating shaft 4.1 for synchronous rotation via the central shaft. The stator blades 2.1 and the movable blades 2.2 are arranged alternately along the circumference of the central shaft, with the number of stator blades 2.1 and movable blades 2.2 being identical and spaced apart. By injecting and discharging hydraulic oil into different spacer cavities, the rotation direction of the movable blades 2.2, and thus the rotation of the central shaft, is controlled, and the central shaft drives the rotating shaft 4.1 for synchronous rotation. In this embodiment, by replacing the stator blades 2.1 and the moving blades 2.2 with different widths and adjusting the interval between the stator blades 2.1 and the moving blades 2.2, the angle between the stator blades 2.1 and the moving blades 2.2 can be changed, thereby changing the rotation range of the moving blades 2.2 to achieve a large-angle swing of the fin 6.

[0049] In this embodiment, two stator blades 2.1 are alternately arranged with two rotor blades 2.2, with the two rotor blades 2.2 spaced 180 degrees apart and symmetrically installed. The stator blades 2.1 are spaced 180 degrees apart and symmetrically installed. The rotor blades 2.2 drive the rotating shaft 4.1 via splines, which in turn drives the fins 6 to rotate, allowing the fins 6 to rotate at an angle of ±65°.

[0050] After the full-speed anti-roll fins of this embodiment are symmetrically installed on both sides of the ship's hull, the lift forces of the fins on both sides are controlled to be equal in magnitude and opposite in direction. The righting moments generated by the lift forces of the two fins on the ship and the disturbance moments of the waves are guaranteed to be of opposite polarity, which can actively counteract the swaying of the ship caused by the waves, and the swaying of the ship is greatly reduced.

[0051] Although the principles of the present invention have been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are merely illustrative of the present invention and are not intended to 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 solution of the present invention fall within the scope of protection of the present invention.

Claims

1. A full-speed fin stabilizer that does not occupy 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 located outside the hull (7) and is a hollow shaft structure, one end of which is fixed to 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) and 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), a small round nut (4.2), and a second rolling bearing (4.3); the rotating shaft (4.1) coaxially passes through the interior of the support shaft (3.1), and two second rolling bearings (4.3) are spaced apart and sleeved on the middle of the rotating shaft (4.1) for supporting the support seat assembly (3) and tightened by the small round nut (4.2); one end of the rotating shaft (4.1) is coaxially connected to the fin (6), and the other end is connected to the vane rotating cylinder (2) installed on the support shaft (3.1), and the vane rotating cylinder (2) drives the fin (6) to rotate coaxially 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) installed on the vane rotating cylinder (2), and 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 with no cabin space occupied according to claim 1, characterized in that: The vane-turning oil cylinder (2) comprises fixed blades (2.1), movable blades (2.2) and a hydraulic system. The fixed blades (2.1) and the movable blades (2.2) are alternately arranged in a circumferential direction of the central axis of the vane-turning oil 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 via the rotating shaft (4.1); the vane-turning oil 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 with no cabin space occupied according to claim 1, characterized in that: The anti-roll fin further comprises a sealing cover (5); the support seat assembly (3) further comprises 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 with no cabin space occupied 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 fin stabilizer 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 fin stabilizer 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 in 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).

7. The full-speed stabilizer fin with no cabin space occupied according to claim 6, characterized in that: Both ends of the rotating shaft (4.1) are 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 tightening 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.

8. The full-speed fin stabilizer without occupying cabin space according to claim 6, characterized in that: The main shaft sleeve (6.1) is a hollow sleeve, the interior of which is an inner circular structure.

9. The full-speed fin stabilizer without occupying cabin space according to claim 8, 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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