A passive fin stabilizer actuator loading rig with adjustable torque

Abstract

The present application belongs to the technical field of marine equipment testing, and specifically relates to a loading bench for a passive fin stabilizer actuator with adjustable torque, including a torque loading mechanism; the torque loading mechanism includes a spring limit assembly and a torsion assembly, the spring limit assembly has two, the torsion assembly is connected to the two spring limit assemblies and is located between the two spring limit assemblies; the torsion assembly has a fin shaft mounting structure, the reciprocating rotation of the fin shaft drives the torsion assembly to compress the two spring limit assemblies, and the two spring limit assemblies are used to generate a load torque acting on the fin shaft of the actuator; the present application can simulate the fluid torque generated by the water flow of the fin of the fin stabilizer device when it is working, without the need for an electric control box and a loading hydraulic power source, and can realize passive loading. By configuring racks of different lengths, a large loading angle can be achieved, and by changing the type and length of the spring, and adjusting the position of the adjusting bolts on the two shafts, different loading forces can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of marine equipment testing, and in particular relates to a passive fin stabilizer actuator loading bench with adjustable torque. Background Art

[0002] Before being installed on board, the fin stabilizer device needs to undergo rigorous bench testing to ensure effective and reliable operation of the device. The strength of the main components of the fin stabilizer actuator and the reliability of the fin shaft support structure need to be verified through various simulated loading tests such as endurance tests, rated load loading and short-time overload tests. To ensure the authenticity of the test data, the loading load and constraint boundary conditions need to be as consistent with the actual conditions as possible. The loading device simulates the hull structure to impose boundary constraints on the fin stabilizer actuator, and the loading device applies simulated loads to load the fin stabilizer.

[0003] like Figure 1 and Figure 2 As shown, for a non-retractable fin stabilizer device, the loading platform of the existing fin stabilizer actuator includes an actuator mounting seat B, a torque loading assembly C, a loading hydraulic power source D and a control box E. The actuator mounting seat B and the torque loading assembly C are fixedly mounted on the bottom plate of the loading platform. The torque loading assembly C includes a fin shaft fixing plate C1 and two loading hydraulic cylinders C2. The two loading hydraulic cylinders C2 are symmetrically mounted at both ends of the fin shaft fixing plate C1. The housing of the actuator A is fixed on the actuator mounting seat B, and the fin shaft of the actuator A is fixed on the fin shaft fixing plate C1. The control box E is used to control the oil inlet or oil return of the loading hydraulic power source D. The loading hydraulic power source D provides hydraulic oil to the two loading hydraulic cylinders C2. When the fin stabilizer actuator needs to be loaded, the actuator A starts working, and the fin shaft of the actuator A rotates along the axis clockwise and counterclockwise within the working angle range. At this time, the control box E sends a control signal to control the proportional relief valve on the loading hydraulic power source D. The rod chamber and the rodless chamber of the loading hydraulic cylinder C2 on both sides of the fin shaft fixing plate C1 are respectively filled with oil. The fin shaft of the actuator A rotates within the working angle range and overcomes the hydraulic pressure of the two loading hydraulic cylinders C2. The two loading hydraulic cylinders C2 generate thrust and pull respectively, pushing and pulling the fin shaft fixing plate C1 to form a force couple, thereby generating a loading torque to realize the loading function.

[0004] The existing loading bench has the following problems: 1. The loading hydraulic power source D has extremely high requirements for control synchronization. The exterior and interior of the loading hydraulic power source D need to be frequently repaired and maintained. If the repair and maintenance are not timely, the oil will deteriorate or dirt such as dust, sand, and soil will enter it, which will cause damage to the internal sealing system, wear of parts, overheating of the system, and mixing of air to cause liquid pressure fluctuations and other faults; 2. The torque loading assembly C is composed of a telescopic hydraulic cylinder, a connecting pin, a double-ear base and related parts. The oil rod of the telescopic hydraulic cylinder reciprocates in a straight line in the cylinder sleeve, and the maximum loading working angle that can be achieved is only ±40°. The working angle of the anti-roll device at zero speed is greater than ±40°. The existing loading bench cannot meet the bench test of the anti-roll device according to the maximum working angle. Since the loading speed and direction of the loading bench are determined by the flow rate of the loading hydraulic power source D and the flow direction of the oil, the movement trajectory of the torque loading assembly C is a reciprocating straight line motion, which cannot simulate the force angle borne by the anti-roll fin device when the actual ship is subjected to seawater fluctuations. The determined flow rate of the loading hydraulic power source D cannot adjust the loading torque during the test. The test data deviates greatly from the actual working conditions of the anti-roll fin actuator, and the durability and reliability of the anti-roll fin actuator cannot be truly and effectively verified. Therefore, a loading bench is needed to solve the problems existing in the prior art. Summary of the invention

[0005] In view of the defects of the prior art, the present invention proposes a novel loading stand for a passive fin stabilizer actuator with adjustable torque. The torsion assembly is connected to two spring limit assemblies and is located between the two spring limit assemblies. The torsion assembly has a fin shaft mounting structure. The reciprocating rotation of the fin shaft drives the torsion assembly to compress the two spring limit assemblies. The two spring limit assemblies can generate a load torque acting on the fin shaft of the actuator, which can simulate the fluid torque generated by the water flow when the fin of the fin stabilizer device is working. No electrical control box and loading hydraulic power source are required, and passive loading can be achieved.

[0006] Specifically, to achieve the above-mentioned purpose, the present invention provides a passive fin stabilizer actuator loading stand with adjustable torque, comprising a torque loading mechanism;

[0007] The torque loading mechanism is vertically fixed on the loading platform, and includes a spring limit assembly and a torsion assembly. The spring limit assembly has two, and the torsion assembly is connected to the two spring limit assemblies and is located between the two spring limit assemblies.

[0008] The torsion assembly has a fin shaft installation structure. The reciprocating rotation of the fin shaft drives the torsion assembly to compress two spring limit assemblies. The two spring limit assemblies are used to generate a load torque acting on the fin shaft of the actuator. The actuator drives the fin shaft to rotate at different angles to drive the torsion assembly to compress the spring limit assemblies to generate spring forces of different sizes, simulating the fluid torque of water flow acting on the fin when the fin stabilizer device is working;

[0009] The spring limit assembly includes a shaft, a spring, a loading rod and an adjusting bolt, and the torsion assembly includes a fin shaft fixing member; the fin shaft fixing member is connected to the loading rod, and the fin shaft drives the fin shaft fixing member to reciprocate and rotate to compress the loading rod, thereby causing the loading rod to compress the spring;

[0010] The fin shaft fixing member includes an outer gear, an adjusting bolt and an inner connecting sleeve; the outer gear is an annular structure, the inner connecting sleeve is two arc-shaped sheet structures, the two inner connecting sleeves are symmetrically sleeved and installed in the inner ring of the outer gear, and the inner ring composed of the two inner connecting sleeves is used to install the fin shaft;

[0011] The outer side of the loading rod has a rack equal to its axial length along its axial direction. The fin shaft fixing part is an external gear with a center hole. The shaft rod and the loading rod each have two. The two loading rods are respectively mounted on the two shaft rods. The fin shaft fixing part is located between the two loading rods. The external gear of the fin shaft fixing part is meshed with the racks of the two loading rods.

[0012] Furthermore, the shaft rods are vertically fixedly mounted on the loading platform, and a loading rod is sleeved on each shaft rod, and the loading rod and the shaft rod are clearance-matched;

[0013] The spring and the adjusting bolt are sleeved on the shaft and located at the two ends of the loading rod. The spring is located between the loading rod and the adjusting bolt. The adjusting bolt is tightly connected to the shaft. The two ends of the spring are respectively connected to the loading rod and the adjusting bolt.

[0014] Furthermore, the shaft rod is a screw rod, the middle part of the screw rod has a smooth rod, both ends of the smooth rod are provided with threads, and the adjusting bolt is screwed and connected with the threads of the shaft rod.

[0015] Furthermore, the outer gear and the inner connecting sleeve have an axial mounting surface and a radial mounting surface. The axial mounting surface is an inclined surface, and the radial mounting surface is a plane. Adding a gasket between the radial mounting surfaces of the outer gear and the inner connecting sleeve can adjust the displacement of the axial mounting surface. The inner diameter size of the two inner connecting sleeves can be adjusted through the displacement of the axial mounting surface.

[0016] Furthermore, there are four springs and four adjusting bolts, and each shaft rod is sleeved with two springs and two adjusting bolts respectively.

[0017] Further, the torque loading mechanism also includes a fixed frame;

[0018] The fixed frame is a rectangular structure, and the top and bottom of the shaft rod are tightly connected to the fixed frame.

[0019] Further, it also includes a mounting bracket and a base;

[0020] The torque loading mechanism and the mounting bracket are fixed on the base, and the mounting bracket is used to fix the housing of the fin stabilizer actuator.

[0021] The beneficial effects of the present invention are:

[0022] First, the torsion assembly of the present invention is connected to two spring limit assemblies and is located between the two spring limit assemblies. The torsion assembly has a fin shaft mounting structure. The reciprocating rotation of the fin shaft drives the torsion assembly to compress the two spring limit assemblies. The two spring limit assemblies can generate a load torque acting on the fin shaft of the actuator, which can simulate the fluid torque generated by the water flow when the fin of the fin stabilizer device is working. No electric control box and loading hydraulic power source are required, and passive loading can be achieved.

[0023] Second, the loading rod and the fin shaft fixing member of the present invention are connected by tooth meshing, one side of the loading rod has a rack with the same length as its axis along its axial direction, and the side of the loading rod with the rack is arranged oppositely; the fin shaft fixing member is an external gear with a central hole, and the external gear of the fin shaft fixing member meshes with the racks of the two loading rods. By configuring racks of different lengths, the loading angle can reach ±65°, or even a larger loading angle;

[0024] Third, the four adjusting bolts of the present invention are respectively sleeved on both ends of the shaft and connected with corresponding springs. By changing the type and length of the springs and adjusting the positions of the adjusting bolts on the two shafts, different loading forces can be achieved;

[0025] Fourth, the fin shaft fixing member of the present invention comprises an outer gear, an adjusting bolt and an inner connecting sleeve, the outer gear is an annular structure, the inner connecting sleeve is two arc-shaped sheet structures, the two inner connecting sleeves are symmetrically sleeved and installed in the inner ring of the outer gear, and the inner ring composed of the two inner connecting sleeves is used to install the fin shaft; the outer gear and the inner connecting sleeve have an axial mounting surface and a radial mounting surface, the axial mounting surface is an inclined surface, and the radial mounting surface is a plane, and the displacement of the axial mounting surface can be adjusted by adding a gasket between the radial mounting surface of the outer gear and the inner connecting sleeve, and the purpose of adjusting the inner diameter size of the two inner connecting sleeves is achieved by the displacement of the axial mounting surface, which can improve the versatility of the fin shaft fixing member;

[0026] Fifth, the gear and rack of the present invention are always meshed with each other, and there is no need to slide the gear when adjusting the position of the adjusting bolt on the two shafts. The friction and wear during the working process are small and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a loading stand for a fin stabilizer actuator in the prior art;

[0028] Figure 2 It is a schematic diagram of a torque loading assembly of a fin stabilizer actuator loading stand in the prior art;

[0029] Figure 3 is a schematic diagram of a loading stand of a passive fin stabilizer actuator with adjustable torque according to the present invention;

[0030] Figure 4 is a schematic diagram of a torque loading assembly of the present invention;

[0031] Figure 5 is a cross-sectional view of a torque loaded fin handle of the present invention.

[0032] Among them, A-actuator; B-actuator mounting seat; C-torque loading assembly; D-loading hydraulic power source; E-control box; 1-torque loading mechanism; 10-fixed frame; 11-stroke adjustment shaft; 12-stroke adjustment bolt; 13-adjustment spring; 14-loading rack; 15-torque loading fin handle; 150-external gear; 151-adjustment bolt; 152-internal connecting sleeve; 2-mounting bracket; 3-base. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The anti-roll fins are installed on the bilges on both sides of the ship, and have a wing-shaped cross-section, also known as side rudders. The anti-roll fins are rotated by the actuator, so that the water flow generates a force on the fins, thereby forming an anti-roll torque and reducing the lateral sway of the ship. Within the working range of the anti-roll fins, as the working angle of the fins increases, the force generated by the water flow on the fins also increases, and the hydrodynamic torque that the actuator needs to overcome when rotating also increases, that is, when the fins work to the maximum working angle, the hydrodynamic torque that the actuator needs to overcome when rotating is the largest, and the strength and stiffness of the device are the largest. The present invention provides a loading stand for a passive anti-roll fin actuator with adjustable torque, which generates spring forces of different sizes by rotating the fin shaft of the actuator at different angles, and the spring force acts on the fin shaft of the actuator, simulating the rotation of the fin shaft of the actuator to overcome the hydrodynamic torque in actual scenarios, and verifies the durability and reliability of the actuator. Example

[0035] like Figure 1As shown, the loading rig of the passive fin stabilizer actuator with adjustable torque includes a torque loading mechanism 1, a mounting bracket 2 and a base 3. The torque loading mechanism 1 and the mounting bracket 2 are fixed on the base 3, the mounting bracket 2 is used to fix the housing of the fin stabilizer actuator, the torque loading mechanism 1 includes a spring limiter assembly and a torsion assembly, the spring limiter assembly has a symmetrical structure, the torsion assembly is connected to the symmetrical structure of the spring limiter assembly, the fin shaft of the fin stabilizer actuator is installed on the torsion assembly of the torque loading mechanism 1, the fin shaft is controlled to rotate within the working angle range of its axis by the fin stabilizer actuator, the torsion assembly of the torque loading mechanism 1 is driven to rotate synchronously with the fin shaft of the fin stabilizer actuator, and the torsion assembly of the torque loading mechanism 1 overcomes the spring pressure of the spring limiter assembly to generate a loading torque.

[0036] like Figure 2 As shown, the torque loading mechanism 1 includes a fixed frame 10 , a stroke adjustment shaft 11 , a stroke adjustment bolt 12 , an adjustment spring 13 , a loading rack 14 and a torque loading fin handle 15 .

[0037] The fixed frame 10 is fixedly mounted on the base 3 . The stroke adjustment shaft rod 11 is a screw rod. There are two stroke adjustment shaft rods 11 . The two stroke adjustment shaft rods 11 are vertically mounted in the fixed frame 10 and are fastened to the top and bottom of the fixed frame 10 .

[0038] Two stroke adjustment bolts 12, two adjustment springs 13 and a loading rack 14 are sleeved and installed on each stroke adjustment shaft 11. The stroke adjustment bolts 12, the adjustment springs 13 and the loading rack 14 are coaxial with the stroke adjustment shaft 11. The loading rack 14 is sleeved in the middle of the stroke adjustment shaft 11, and the two ends of the loading rack 14 are respectively fixedly connected to the two adjustment springs 13. The loading rack 14 and the adjustment spring 13 are both clearance-matched with the stroke adjustment shaft 11. The ends of the two adjustment springs 13 that are not connected to the loading rack 14 are fixedly installed on the stroke adjustment bolts 12, and the two stroke adjustment bolts 12 are threadedly connected to the stroke adjustment shaft 11.

[0039] One side of the loading rack 14 has a rack with the same axial length along its axial direction, and the two loading racks 14 are relatively mounted on each stroke adjustment shaft 11 with one side of the rack. The torque loading fin handle 15 has an external gear, which is meshed with the racks of the two loading racks 14 and is located between the two loading racks 14. The middle part of the torque loading fin handle 15 has a mounting hole, which is used to fix the fin shaft of the fin stabilizer actuator.

[0040] like Figure 5As shown, the torque loading fin handle 15 has a fin shaft diameter adjustment assembly, including an outer gear 150, an adjustment bolt 151 and an inner connecting sleeve 152. The outer gear 150 is an annular structure, and the inner connecting sleeve 152 is two arc-shaped sheet structures. The two inner connecting sleeves 152 are symmetrically sleeved and installed in the inner ring of the outer gear 150. The fin shaft of the fin stabilizer actuator penetrates into the arc formed by the two inner connecting sleeves 152, and its shaft shoulder is fitted with the end face of the outer gear 150 for limiting. The cross-section of the inner connecting sleeve 152 is an L-shaped structure, which extends along the length of its arc. The joint surface between the long side of the L-shaped structure and the outer gear 150 is an inclined surface, and the joint surface between the short side of the L-shaped structure and the outer gear 150 is a plane, and the plane is perpendicular to the axis of the inner connecting sleeve 152. The outer gear 150 and the inner connecting sleeve 152 are fixedly installed by adjusting bolts 151 at the plane end, and gaskets are added or removed between the two inner connecting sleeves 152 and the fixing surfaces of the adjusting bolts 151 of the outer gear 150 to make the outer gear 150 and the inner connecting sleeve 152 slide along the inclined surface, thereby adjusting the diameter of the inner arc surface of the two inner connecting sleeves 152 to match fin shafts of different diameters.

[0041] The actuator drives the fin shaft to rotate and drives the torque-loaded fin handle 15 to rotate in the same direction, so that the torque-loaded fin handle 15 compresses the loading rack 14 on one side downward and compresses the loading rack 14 on the other side upward. The spring force generated by the compression satisfies Hooke's law. The calculation formula of the spring force is: F=K*△S, where: F is the spring force, K is the stiffness coefficient, and △S is the dynamic loading rack stroke. The calculation formula of the dynamic loading rack 14 stroke is: △S=R*tg(α), where: R is the radius of the torque-loaded fin handle, and α is the fin shaft rotation angle.

[0042] The spring force drives the torque loading fin handle 15 through the loading rack 14 to form a load moment. As the working angle of the fin increases, the dynamic loading rack stroke △S also increases, the spring force F also increases, and the load moment generated by driving the loading fin handle also increases.

[0043] The method for operating the loading stand of the passive fin stabilizer actuator with adjustable torque of the present invention comprises the following steps:

[0044] Step 1: Install the actuator onto the passive fin stabilizer actuator loading stand with adjustable torque. Pass the actuator fin shaft through the torque loading fin handle 15.

[0045] Step 2: Start the test to verify the durability and reliability of the actuator. The actuator starts working, controls the fin shaft to rotate clockwise and counterclockwise, and the fin shaft drives the torque-loaded fin handle 15 to rotate clockwise and counterclockwise along the axis. The torque-loaded fin handle 15 drives the loading racks 14 on both sides to move. The loading racks 14 on both sides compress the adjustment spring 13 in opposite directions, and the adjustment spring 13 generates a load torque acting on the fin shaft.

[0046] Step 3: Carry out the test according to the test standard. After the test, remove the actuator from the loading bench to complete the loading test operation.

[0047] The loading torque generated by the loading rig of the passive fin stabilizer actuator with adjustable torque during operation effectively simulates the fluid torque generated by the water flow of the fin stabilizer device when the fin is working, which is convenient for effectively verifying the durability and reliability of the fin stabilizer actuator before the fin stabilizer device leaves the factory, and effectively verifies the strength and stiffness of the fin stabilizer actuator at the maximum working angle.

[0048] The above is only an embodiment of the present invention, and the common sense such as the known specific structure and characteristics in the scheme is not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A passive fin stabilizer actuator loading stand with adjustable torque, characterized in that: including a torque loading mechanism; The torque loading mechanism is vertically fixed on the loading platform, and includes a spring limit assembly and a torsion assembly. The spring limit assembly has two, and the torsion assembly is connected to the two spring limit assemblies and is located between the two spring limit assemblies. The torsion assembly has a fin shaft installation structure. The reciprocating rotation of the fin shaft drives the torsion assembly to compress two spring limit assemblies. The two spring limit assemblies are used to generate a load torque acting on the fin shaft of the actuator. The actuator drives the fin shaft to rotate at different angles to drive the torsion assembly to compress the spring limit assemblies to generate spring forces of different sizes, simulating the fluid torque of water flow acting on the fin when the fin stabilizer device is working; The spring limit assembly includes a shaft, a spring, a loading rod and an adjusting bolt, and the torsion assembly includes a fin shaft fixing member; the fin shaft fixing member is connected to the loading rod, and the fin shaft drives the fin shaft fixing member to reciprocate and rotate to compress the loading rod, thereby causing the loading rod to compress the spring; The fin shaft fixing member includes an outer gear, an adjusting bolt and an inner connecting sleeve; the outer gear is an annular structure, the inner connecting sleeve is two arc-shaped sheet structures, the two inner connecting sleeves are symmetrically sleeved and installed in the inner ring of the outer gear, and the inner ring composed of the two inner connecting sleeves is used to install the fin shaft; The outer side of the loading rod has a rack equal to its axial length along its axial direction. The fin shaft fixing part is an external gear with a center hole. The shaft rod and the loading rod each have two. The two loading rods are respectively mounted on the two shaft rods. The fin shaft fixing part is located between the two loading rods. The external gear of the fin shaft fixing part is meshed with the racks of the two loading rods.

2. The passive fin stabilizer actuator loading stand with adjustable torque according to claim 1, characterized in that: The shaft rods are vertically fixedly installed on the loading platform, and a loading rod is sleeved on each shaft rod, and the loading rod and the shaft rod are in clearance fit; The spring and the adjusting bolt are sleeved on the shaft and located at the two ends of the loading rod. The spring is located between the loading rod and the adjusting bolt. The adjusting bolt is tightly connected to the shaft. The two ends of the spring are respectively connected to the loading rod and the adjusting bolt.

3. The passive fin stabilizer actuator loading stand with adjustable torque according to claim 2, characterized in that: The shaft rod is a screw rod, the middle part of the screw rod is provided with a smooth rod, both ends of the smooth rod are provided with threads, and the adjusting bolt is screwed and connected with the threads of the shaft rod.

4. The passive fin stabilizer actuator loading stand with adjustable torque according to claim 2, characterized in that: The outer gear and the inner connecting sleeve have an axial mounting surface and a radial mounting surface. The axial mounting surface is an inclined surface and the radial mounting surface is a plane. Adding a gasket between the radial mounting surfaces of the outer gear and the inner connecting sleeve can adjust the displacement of the axial mounting surface. The inner diameter size of the two inner connecting sleeves can be adjusted through the displacement of the axial mounting surface.

5. The passive fin stabilizer actuator loading stand with adjustable torque according to claim 2, characterized in that: There are four springs and four adjusting bolts, and each shaft rod is respectively sleeved with two springs and two adjusting bolts.

6. The passive fin stabilizer actuator loading stand with adjustable torque according to claim 2, characterized in that: The torque loading mechanism also includes a fixed frame; The fixed frame is a rectangular structure, and the top and bottom of the shaft rod are tightly connected to the fixed frame.

7. The passive fin stabilizer actuator loading stand with adjustable torque according to claim 1, characterized in that: Also included is a mounting bracket and base; The torque loading mechanism and the mounting bracket are fixed on the base, and the mounting bracket is used to fix the housing of the fin stabilizer actuator.

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