Retractable loading device for retractable fin stabilizer

Abstract

The utility model belongs to the technical field of marine part test benches, and particularly relates to a retractable loading device for a retractable fin stabilizer, which comprises a fin handle, an electric cylinder, a telescopic oil cylinder, a slide rail and a mounting platform, one end of the rotating shaft is rotationally connected with the mounting platform, and the other end of the rotating shaft is connected with a rotary body of the retracting and releasing mechanism; the electric cylinder and the telescopic oil cylinder are respectively mounted on the mounting platform; the multiple electric cylinders are distributed at the bottom of the sliding rail at intervals, and push rods of the electric cylinders are connected with the bottom of the sliding rail. A first mounting seat and a second mounting seat are respectively arranged on two sides of the fin handle; the first mounting base is rotationally connected with a push rod of the telescopic oil cylinder, and the second mounting base is slidably connected with the sliding rail. Based on fluid resistance and fluid lift force borne by a fin release outboard when a ship sails, the retracting and releasing loading device simulates a fluid load borne by a retracting and releasing mechanism for overcoming the fin release outboard in the actual sailing process so as to verify the structural stability and the retracting and releasing capacity of the retracting and releasing mechanism.

Description

Technical Field

[0001] The utility model belongs to the technical field of a test bench for marine parts, and in particular relates to a retractable loading device for a retractable fin stabilizer. Background Art

[0002] As the most widely used ship roll stabilization device, fin stabilizers can be divided into retractable fin stabilizers and non-retractable fin stabilizers. For retractable fin stabilizers, the retraction and extension process of the fins is achieved through a retraction and extension mechanism. Figure 1 As shown, the retractable and retractable fin stabilizer retractable mechanism A comprises a thrust block A1, a retractable and retractable oil cylinder A2, a thrust rod A3, a sleeve A4, a retractable and retractable connecting rod A5, a guide sleeve A6 and a slewing body A7. When the retractable and retractable fin stabilizer is not working, the fin needs to be retracted into the fin box at the belly of the ship, and the rod chamber of the retractable and retractable oil cylinder A2 is filled with oil, so that the piston rod moves toward the bow, and the thrust rods A3 on both sides of the piston rod push the sleeve A4 to move linearly along the guide sleeve A6, and the traction of the retractable and retractable connecting rod A5 drives the slewing body A7 and other components to rotate toward the stern direction, so that the fin is retracted into the fin box. When the retractable fin stabilizer is working, oil enters the rodless chamber of the retractable cylinder A2, causing the piston rod to move toward the stern of the ship. The thrust rods A3 on both sides push the sliding sleeve A4 to move linearly along the guide sleeve A6. Through the traction of the retractable connecting rod A5, the rotating body A7 and other components are driven to rotate toward the bow direction, thereby releasing the fin overboard.

[0003] Since the need for roll reduction often occurs during navigation, the retractable fin stabilizer needs to overcome the external fluid load during the release process. In the prior art, the load capacity verification of the retractable fin stabilizer process remains in theoretical calculations, and there is a lack of onshore loading technology. Therefore, a loading device is needed to simulate the retractable mechanism overcoming the external fluid load outside the fin release during actual navigation, so as to verify the structural stability and retractable capacity of the retractable mechanism. Utility Model Content

[0004] In view of the defects of the prior art, the utility model proposes a retractable loading device for retractable anti-roll fins. Based on the fact that when a ship is sailing, the fins are subjected to fluid resistance and fluid lift when they are released outboard, the retractable loading device simulates the process of overcoming the fluid load suffered by the fins when they are released outboard during actual sailing, so as to verify the structural stability and retractable capacity of the retractable loading device.

[0005] In order to achieve the above-mentioned object, the utility model provides a retractable loading device for a retractable fin stabilizer, wherein the retractable fin stabilizer comprises a retractable mechanism, and the retractable loading device is installed at the bottom of the retractable mechanism; the retractable loading device comprises a fin handle, an electric cylinder, a telescopic oil cylinder, a slide rail and a mounting platform;

[0006] A rotating shaft is installed at the center of the fin handle, one end of the rotating shaft is rotatably connected to the mounting platform, and the other end of the rotating shaft is connected to the rotating body of the retracting and extending mechanism; the electric cylinder and the telescopic oil cylinder are respectively installed on the mounting platform; there are multiple electric cylinders, and the multiple electric cylinders are distributed at intervals at the bottom of the slide rail, and their push rods are connected to the bottom of the slide rail; a first mounting seat and a second mounting seat are respectively provided on both sides of the fin handle; the first mounting seat is rotatably connected to the push rod of the telescopic oil cylinder, and the second mounting seat is slidably connected to the slide rail.

[0007] Furthermore, the slide rail is an arc-shaped structure, and its cross-section is a U-shaped groove, and the roller mounting seat is located in the U-shaped groove of the slide rail.

[0008] Furthermore, the retractable loading device also includes a roller group; the roller group is installed on the roller mounting seat and abuts against the U-shaped groove of the slide rail.

[0009] Furthermore, the roller assembly is mounted on the bottom and the top of the roller mounting seat.

[0010] Furthermore, each of the electric cylinders moves synchronously and sequentially outputs the same thrust or pull; changing the thrust or pull output each time is used to simulate the load change of fluid lift.

[0011] Furthermore, the angle formed by the center of the fin handle to the two ends of the arc-shaped structure of the slide rail is the rotation angle of the retracting mechanism.

[0012] Furthermore, a central axis of the arc-shaped structure of the slide rail is colinear with a central axis of the fin handle.

[0013] Furthermore, it also includes a test bench; the test bench includes a bottom plate, a partition and a side plate, the bottom plate is the installation platform of the retractable loading device; the partition is arranged above the bottom plate, and the partition and the bottom plate are connected by a plurality of side plates; the rotating shaft mounting seat of the fin handle, the electric cylinder and the telescopic cylinder are installed on the bottom plate, and the retractable mechanism is installed on the partition.

[0014] The beneficial effects of the utility model are:

[0015] First, the structure of the utility model adopts a fin handle, multiple electric cylinders, a telescopic oil cylinder and a slide rail. A first mounting seat and a second mounting seat are respectively arranged on both sides of the fin handle, and multiple electric cylinders are spaced and distributed at the bottom of the slide rail; the first mounting seat of the fin handle is rotatably connected to the push rod of the telescopic oil cylinder through a pin shaft, the second mounting seat of the fin handle is slidably connected to the slide rail, and is rotatably connected to the retracting and extending mechanism through the fin handle. When the retracting and extending mechanism reciprocates and drives the fin handle to rotate, the hydraulic oil pressure of the telescopic oil cylinder is overcome by the retracting and extending mechanism to simulate fluid resistance, and the force applied by the electric cylinder to the bottom of the slide rail is transmitted to the retracting and extending mechanism through the fin handle. The fluid lift is simulated by overcoming the force of the electric cylinder by the retracting and extending mechanism. The utility model is based on the fluid resistance and fluid lift suffered by the fin when the fin is released outboard when the ship is sailing, and simulates the retracting and extending mechanism overcoming the fluid load suffered by the fin when the fin is released outboard during actual sailing, which solves the problem that the current load capacity verification of the retracting and extending mechanism is still at the stage of theoretical calculation, and the structural stability and retracting and extending capacity of the retracting and extending mechanism are verified by a test bench;

[0016] Second, the electric cylinder and telescopic oil cylinder of the utility model work synchronously, and the retracting and releasing loading device is equipped with the retracting and releasing mechanism. The retracting and releasing mechanism is arranged according to the actual state. The retracting and releasing loading device provides fluid resistance and fluid lift to the retracting and releasing mechanism. The retracting and releasing mechanism bears the fluid lift at different rotation positions while bearing the fluid resistance. This can truly and effectively verify that the fins are released outboard and are subject to fluid load when the ship is sailing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a retractable and retractable mechanism of a retractable fin stabilizer in the prior art;

[0018] Figure 2 It is a front view of the retractable loading device of the retractable fin stabilizer of the utility model;

[0019] Figure 3 It is a top view of the retractable loading device of the retractable fin stabilizer of the utility model;

[0020] Figure 4 It is a schematic diagram of the retractable loading device of the retractable fin stabilizer of the utility model equipped with the retractable mechanism;

[0021] Figure 5 The fluid resistance test data of the retractable loading device equipped with the retractable mechanism of the embodiment of the present invention;

[0022] Figure 6 It is the fluid lift test data of the retractable loading device equipped with the retractable mechanism according to the embodiment of the present invention.

[0023] Among them, A-retracting and extending mechanism; A1-thrust block; A2-recovery and releasing cylinder; A3-thrust rod; A4-sliding sleeve; A5-retracting and extending connecting rod; A6-guide sleeve; A7-rotating body; 1-fin handle; 2-rotating shaft; 3-electric cylinder; 4-roller group; 5-telescopic cylinder; 6-cylinder mounting seat; 7-slide rail. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] The terms such as up, down, left, right, front and back in this application document are based on the positional relationships shown in the drawings. If the drawings are different, the corresponding positional relationships may also change accordingly, so they cannot be understood as limiting the scope of protection.

[0026] In this application, the terms "install", "connected", "connected", "connected", "fixed" and the like 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 mutual communication, a direct connection, or an indirect connection through an intermediate medium, the internal connection of two components, or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The utility model records a retractable loading device for retractable anti-roll fins. The retractable loading device and the retractable mechanism are both installed on a test bench, wherein the retractable mechanism is arranged according to the design state. The navigation of a ship is subject to external flow field disturbances and changes in the longitudinal posture of the ship itself. When the fin is retracted, it generates an angle of attack with the external flow field at a certain angle, so that the fin is subjected to fluid resistance and fluid lift when it is released outboard. The fluid resistance and fluid lift are the fluid loads on the retractable mechanism of the fin. The retractable loading device of the utility model verifies the structural stability and retractable capacity of the retractable mechanism by simulating the retractable mechanism overcoming the fluid load on the fin when it is released outboard during the actual navigation of the ship.

[0028] Refer to the instruction manual Figure 2-4 The retractable loading device of the utility model is connected to the rotating body of the retractable mechanism A and is located below the retractable mechanism A. The retractable loading device includes a fin handle 1, a rotating shaft 2, an electric cylinder 3, a roller group 4, a telescopic oil cylinder 5, an oil cylinder mounting seat 6, a slide rail 7 and a rotating shaft mounting seat.

[0029] The shaft mounting seat is fixed on the bottom plate of the retractable loading device, and has a bearing inside. The shaft 2 is vertically arranged, one end of which is rotatably connected to the bearing in the shaft mounting seat, and the other end is connected to the rotary body of the retractable mechanism A. The fin handle 1 is sleeved on the shaft 2 and is located between the shaft mounting seat and the rotary body of the retractable mechanism A. The fin handle 1 and the shaft 2 are spline matched. The fin handle 1 has an internal spline hole, and the shaft 2 is provided with an external spline.

[0030] A trunnion mounting seat is arranged on one side of the periphery of the fin handle 1, and a roller mounting seat is arranged on the side opposite to the trunnion mounting seat. In this embodiment, the roller mounting seat is higher than the trunnion mounting seat.

[0031] The trunnion mounting seat of the fin handle 1 is connected to the push rod of the telescopic oil cylinder 5 through a pin shaft. The push rod of the telescopic oil cylinder 5 rotates around the pin shaft in the trunnion mounting seat of the fin handle 1 during the telescopic process. The cylinder body of the telescopic oil cylinder 5 is fixedly mounted on the oil cylinder mounting seat 6. The oil cylinder mounting seat 6 is fixed on the bottom plate of the retractable loading device. The telescopic oil cylinder 5 adopts a passive push-pull oil cylinder.

[0032] The roller group 4 is installed on the roller mounting seat of the fin handle 1. The slide rail 7 is an arc-shaped structure with a cross-section of a U-shaped groove. The roller mounting seat of the fin handle 1 is located in the U-shaped groove of the slide rail 7. The roller group 4 abuts against the U-shaped groove of the slide rail 7. The roller mounting seat of the fin handle 1 slides and displaces in the U-shaped groove of the slide rail 7 through the roller group 4. The sliding trajectory is the arc line of the arc-shaped structure. The angle formed by the center of the rotating shaft 2 to the two ends of the arc-shaped structure of the slide rail 7 is the rotation angle of the retracting mechanism A.

[0033] by Figure 3 Taking the state shown as an example, the thrust rod of the retracting and releasing mechanism A pushes the sliding sleeve to reciprocate along the guide sleeve, thereby driving the rotating body and other components of the retracting and releasing mechanism A to rotate toward the stern or bow direction. The rotating body of the retracting and releasing mechanism A drives the rotating shaft 2 to rotate, and the roller group 4 drives the roller mounting seat of the fin handle 1 to rotate and slide in the slide rail 7, so that the ear shaft mounting seat of the fin handle 1 pushes and pulls the push rod of the telescopic cylinder 5. The push rod of the telescopic cylinder 5 is passively compressed or stretched to generate a reverse torque on the fin handle 1, and then transmitted to the retracting and releasing mechanism A connected to the rotating shaft 2. The retracting and releasing mechanism A overcomes the hydraulic oil pressure of the telescopic cylinder 5. This process is used to simulate the actual navigation process. When the fin is released overboard or recovered, the retracting and releasing mechanism A is subject to fluid resistance. Instruction manual attached Figure 5 The present invention provides fluid lift test data of the retractable loading device equipped with the retractable mechanism.

[0034] The telescopic cylinder pressure P of the fluid resistance loaded by the retractable loading device of the utility model on the retractable mechanism is determined by the following formula:

[0035] P=0.5AHV 2 L / (NS)

[0036] Wherein: A is the horizontal projection area of ​​the fin, H is the product of the fluid resistance coefficient and the seawater density when the fin is extended outboard, V is the speed of the ship when the fin is extended outboard, L is the distance from the center of the fin extension (the distance from the end surface of the fin tip to the end surface of the fin root is the fin extension) to the fin rotation center, N is the distance from the pin center of the ear shaft mounting seat of the fin handle 1 to the center of the rotating shaft 2, and S is the effective area of ​​the telescopic cylinder 5.

[0037] There are multiple electric cylinders 3, which are distributed at intervals at the bottom of the slide rail 7. The electric cylinder 3 has a telescopic structure. One end of the push rod of the electric cylinder 3 is connected to the bottom of the slide rail 7, and the other end of the shell is installed on the bottom plate of the retractable loading device. Multiple electric cylinders 3 work synchronously to apply upward thrust and downward pulling force to the bottom of the slide rail 7, which are transmitted to the retractable mechanism A through the roller group 4, the fin handle 1 and the rotating shaft 2. This process is used to simulate the fluid lift of the retractable mechanism A to overcome the water flow fluctuations when the fin is released outboard during actual navigation. Figure 6 The present invention provides fluid lift test data of the retractable loading device equipped with the retractable mechanism.

[0038] There are n electric cylinders 3 distributed at intervals at the bottom of the slide rail 7. The thrust or pull force output by each electric cylinder 3 is the same. In the process of outputting the thrust or pull force, the load change of the fluid lift is simulated by changing the magnitude of the output force of the electric cylinder 3. The thrust or pull force F output by each electric cylinder 3 is determined by the following formula:

[0039] F=0.5AKV 2 / n

[0040] Wherein: A is the horizontal projection area of ​​the fin, K is the fluid lift coefficient when the fin is extended outboard, V is the speed of the ship when the fin is extended outboard, and n is the number of the electric cylinders 3.

[0041] The retractable loading device of this embodiment also includes a test bench, which includes a bottom plate, a partition and a side plate. The partition is arranged above the bottom plate, and the partition and the bottom plate are connected by a plurality of side plates. The shaft mounting seat, a plurality of electric cylinders 3 and the oil cylinder mounting seat 6 are respectively fixedly mounted on the bottom plate, the fin handle 1, the shaft 2, the roller group 4, the telescopic oil cylinder 5 and the slide rail 7 are located between the partition and the bottom plate, one end of the rotary body of the recovery mechanism is fixedly mounted on the bottom of the partition and connected to the shaft 2, and the other end of the rotary body of the recovery mechanism A extends above the partition and is connected to the retractable connecting rod of the recovery mechanism.

[0042] The working principle of the retractable loading device for retractable fin stabilizers of the utility model is as follows:

[0043] The telescopic oil cylinder 5 and the electric cylinder 3 output a given thrust according to the preset value. The telescopic oil cylinder 5 and the fin handle 1 together form a push-pull structure to simulate the fluid resistance torque. The thrust on the electric cylinder 3 simulates the fluid lift and is transmitted to the roller group 4 through the slide rail 7. The roller group 4 transmits the simulated fluid lift to the fin handle 1 and then to the retracting mechanism A. The retracting mechanism A reciprocates according to the preset value. The rotating body of the retracting mechanism A is connected to the rotating shaft 2. The rotational motion of the rotating body is transmitted to the fin handle 1 through the rotating shaft 2. The roller group 4 in the fin handle 1 reciprocates and rolls in the slide rail 7 as the retracting mechanism rotates. The fin handle 1 passively compresses or stretches the push rod of the telescopic oil cylinder 5, and the push rod transmits the simulated fluid resistance in the reverse direction to the retracting mechanism A. At this point, the retracting mechanism A is simultaneously subjected to the fluid resistance torque and fluid lift during the retracting process.

[0044] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A retractable loading device for a retractable fin stabilizer, the retractable fin stabilizer comprising a retractable mechanism, the retractable loading device being installed at the bottom of the retractable mechanism; characterized in that: The retractable loading device comprises a fin handle (1), an electric cylinder (3), a telescopic oil cylinder (5), a slide rail (7) and a mounting platform; A rotating shaft is installed at the center of the fin handle (1), one end of the rotating shaft is rotatably connected to the mounting platform, and the other end of the rotating shaft is connected to the rotating body of the retracting and releasing mechanism; the electric cylinder (3) and the telescopic oil cylinder (5) are respectively installed on the mounting platform; the electric cylinder (3) has a plurality of them, and the plurality of electric cylinders (3) are spaced apart at the bottom of the slide rail (7), and their push rods are connected to the bottom of the slide rail (7); a first mounting seat and a second mounting seat are respectively provided on both sides of the fin handle (1); the first mounting seat is rotatably connected to the push rod of the telescopic oil cylinder (5), and the second mounting seat is slidably connected to the slide rail (7).

2. The retractable loading device for retractable fin stabilizers according to claim 1, characterized in that: The slide rail (7) is an arc-shaped structure, and its cross section is a U-shaped groove. The roller mounting seat is located in the U-shaped groove of the slide rail (7).

3. The retractable loading device for retractable fin stabilizers according to claim 2, characterized in that: The retractable loading device also includes a roller group (4); the roller group (4) is mounted on the roller mounting seat and abuts against the U-shaped groove of the slide rail (7).

4. The retractable loading device for retractable fin stabilizers according to claim 3, characterized in that: The roller assembly (4) is mounted on the bottom and the top of the roller mounting seat.

5. The retractable loading device for retractable fin stabilizers according to claim 1, characterized in that: The thrust or pulling force outputted by each of the electric cylinders (3) in synchronous motion in sequence is the same; the thrust or pulling force outputted each time is changed to simulate the load change of the fluid lift.

6. The retractable loading device for retractable fin stabilizers according to claim 2, characterized in that: The angle formed between the center of the fin handle (1) and the two ends of the arc-shaped structure of the slide rail (7) is the rotation angle of the retractable mechanism.

7. The retractable loading device for retractable fin stabilizers according to claim 2, characterized in that: The central axis of the arc-shaped structure of the slide rail (7) is colinear with the central axis of the fin handle (1).

8. The retractable loading device for retractable fin stabilizers according to claim 1, characterized in that: It also includes a test bench; the test bench includes a bottom plate, a partition plate and a side plate, the bottom plate is a mounting platform for the retractable loading device; the partition plate is arranged above the bottom plate, and the partition plate and the bottom plate are connected via a plurality of side plates; the shaft mounting seat of the fin handle (1), the electric cylinder (3) and the telescopic oil cylinder (5) are mounted on the bottom plate, and the retractable mechanism is mounted on the partition plate.

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