Detachable hydrofoil attack angle adjusting device of variable-form small-waterplane-area catamaran ship model

Abstract

The invention relates to a detachable hydrofoil attack angle adjusting device of a ship model, in particular to a detachable hydrofoil attack angle adjusting device of a variable-form small-waterplane-area catamaran ship model, and aims to solve the problem that after the form of an existing variable-form small-waterplane-area catamaran ship model is changed, the variable-form small-waterplane-area catamaran ship model cannot be used for adjusting the angle of attack of the variable-form small-waterplane-area catamaran ship model. And the horizontal rotation angle and the incoming flow attack angle of the hydrofoil cannot be manually and effectively adjusted. The ship comprises a main ship body and a detachable hydrofoil attack angle adjusting mechanism. The main ship body comprises a left sheet body, a right sheet body, a set of longitudinal supporting pipes and a set of transverse supporting pipes. A group of longitudinal supporting pipes are arranged above the left sheet body and the right sheet body, a group of transverse supporting pipes are arranged on the group of longitudinal supporting pipes, and a detachable hydrofoil attack angle adjusting mechanism is arranged on the left sheet body and the right sheet body. The method is applied to the technical field of water surface navigation.

Description

Technical Field

[0001] The invention relates to a detachable hydrofoil attack angle adjusting device for a ship model, in particular to a detachable hydrofoil attack angle adjusting device for a deformable small waterplane area catamaran ship model. The invention is used in the field of water surface navigation technology. Background Art

[0002] With the in-depth exploration of the vast ocean, small waterplane area catamarans have attracted more and more attention due to their outstanding seakeeping performance. On the basis of conventional small waterplane area catamarans, the deformable small waterplane area catamaran has added a hydrofoil horizontal angle and attack angle adjustment device. Therefore, in order to use the water tank test method to study the influence of hydrofoils on the hydrodynamic performance of the deformable small waterplane area catamaran, it is urgent to design a detachable hydrofoil attack angle adjustment device that can be adjusted accordingly according to the shape transformation of the deformable small waterplane area catamaran model to meet the needs of the ship model test for hydrofoils with different horizontal angles and attack angles.

[0003] In the current ship model water tank test, the Chinese patent application number is CN200910053197.4, and the patent document named "Water Tank Ship Model Test Water Plane Motion Mechanism" proposes a water plane motion mechanism for ship model testing. Although the device has high precision in maneuverability performance testing and a simple structure, it does not involve any content related to the detachable hydrofoil angle of attack adjustment device, and it can only be applied to a single type of ship model.

[0004] The problem that the horizontal rotation angle and the incoming flow angle of the hydrofoil of the current deformable small waterplane area catamaran model cannot be effectively adjusted artificially after the shape is transformed. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the horizontal rotation angle and the incoming flow attack angle of the hydrofoil of the current deformable small waterplane area catamaran ship model cannot be effectively adjusted manually after the shape is changed. Further, a detachable hydrofoil attack angle adjustment device of the deformable small waterplane area catamaran ship model is provided.

[0006] The technical solution adopted by the present invention to solve the above problems is:

[0007] A detachable hydrofoil attack angle adjustment device for a deformable small waterplane area catamaran ship model, comprising a main hull and a detachable hydrofoil attack angle adjustment mechanism, wherein the main hull comprises a left sheet body, a right sheet body, a group of longitudinal support tubes and a group of transverse support tubes;

[0008] A group of longitudinal support tubes are installed above the left sheet body and the right sheet body, a group of transverse support tubes are installed on the group of longitudinal support tubes, and a detachable hydrofoil angle of attack adjustment mechanism is installed on the left sheet body and the right sheet body.

[0009] Further, the left sheet body and the right sheet body have the same structure, the left sheet body includes a front support, a rear support and an underwater submersible body, a set of longitudinal support tubes includes two longitudinal support tubes, and a set of transverse support tubes includes two transverse support tubes;

[0010] Each longitudinal support tube is installed on the front support and the rear support, and the front support and the rear support are installed on the underwater submersible body, the two transverse support tubes are installed on the two longitudinal support tubes, and the detachable hydrofoil angle of attack adjustment mechanism is installed on the two underwater submersible bodies.

[0011] Further, the detachable hydrofoil angle of attack adjustment mechanism includes a left rear detachable hydrofoil angle of attack adjustment component, a left front detachable hydrofoil angle of attack adjustment component, a right rear detachable hydrofoil angle of attack adjustment component and a right front detachable hydrofoil angle of attack adjustment component;

[0012] The left rear detachable hydrofoil angle of attack adjustment component is installed on the inner side of the underwater submersible on the left body near the rear end, the left front detachable hydrofoil angle of attack adjustment component is installed on the inner side of the underwater submersible on the left body near the front end, the right rear detachable hydrofoil angle of attack adjustment component is installed on the inner side of the underwater submersible on the right body near the rear end, and the right front detachable hydrofoil angle of attack adjustment component is installed on the inner side of the underwater submersible on the right body near the front end.

[0013] Further, the left rear detachable hydrofoil angle of attack adjustment component, the left front detachable hydrofoil angle of attack adjustment component, the right rear detachable hydrofoil angle of attack adjustment component and the right front detachable hydrofoil angle of attack adjustment component have the same structure, and the left rear detachable hydrofoil angle of attack adjustment component includes a hydrofoil detachable assembly, an angle of attack adjustment assembly and a hydrofoil;

[0014] The hydrofoil is installed on the side wall of the underwater submersible body through a detachable hydrofoil assembly, and the angle of attack adjustment assembly is installed on the detachable hydrofoil assembly.

[0015] Further, the hydrofoil detachable assembly includes a connecting plate, an insert, an insert connecting shaft, a locking pin, a hydrofoil connecting shaft and a hydrofoil locking rod;

[0016] The connecting plate is an arc-shaped plate, the insert is an arc-shaped block, the inner arc surface of the insert is matched with the outer arc surface of the connecting plate, the insert is installed on the connecting plate, and the connecting plate is fixedly installed on the underwater submerged body. A 0° through hole, a 10° through hole and a 40° through hole are processed along the arc direction on the arc surface of the insert, and a 0° locking pin hole, a 10° locking pin hole and a 40° locking pin hole are processed on the side wall of the insert, and the center lines of the 0° locking pin hole, the 10° locking pin hole and the 40° locking pin hole are aligned with the center lines of the insert. The 0° through hole 30a intersects with the 0° locking pin hole, the 10° through hole intersects with the 10° locking pin hole, the 40° through hole intersects with the 40° locking pin hole, one end of the insert connecting shaft is inserted in the 0° through hole, and the locking pin is inserted in the 0° locking pin hole and one end of the insert connecting shaft, the other end of the insert connecting shaft is connected to one end of the hydrofoil connecting shaft, and the other end of the hydrofoil connecting shaft is installed in the hydrofoil locking rod hole of the hydrofoil through the hydrofoil locking rod.

[0017] Furthermore, an external thread is processed on the hydrofoil connecting shaft, an internal thread hole is processed on the insert connecting shaft, and the external thread of the hydrofoil connecting shaft is threadedly connected with the internal thread hole of the insert connecting shaft.

[0018] Further, the attack angle adjustment assembly includes an attack angle disc, a stop nut, a spring washer and a plurality of stop screws;

[0019] The outer side wall of the threaded hole in the insert connecting shaft is processed with an external thread, the angle attack disc is fixedly sleeved on the hydrofoil connecting shaft, the stop nut is sleeved on the external thread of the insert connecting shaft, the spring washer is sleeved on the hydrofoil connecting shaft, and the spring washer is located on the angle attack disc and the stop nut, and the angle attack disc and the stop nut are fixedly connected by multiple stop screws.

[0020] Furthermore, an upper hole for the insert stud is processed on the upper side of the outer cylindrical surface of the insert, a lower hole for the insert stud is processed on the lower side of the outer cylindrical surface of the insert, a threaded hole on the connecting plate is processed on the upper side of the outer cylindrical surface of the connecting plate, a lower threaded hole on the connecting plate is processed on the lower side of the outer cylindrical surface of the connecting plate, and a screw is respectively arranged in the upper hole for the insert stud and the lower hole for the insert stud.

[0021] The upper hole of the insert stud of the insert block is corresponding to the threaded hole on the connecting plate of the connecting plate, and the screw is installed on the upper hole of the insert stud and the threaded hole on the connecting plate. The lower hole of the insert stud of the insert block is corresponding to the lower threaded hole on the connecting plate of the connecting plate, and the screw is installed on the lower hole of the insert stud and the lower threaded hole on the connecting plate.

[0022] Furthermore, it also includes a plurality of load-bearing columns, a plurality of square pipe seats and a plurality of semi-detachable T-shaped three-way connectors;

[0023] A load-bearing column and a square tube seat are installed on the front pillar, and a load-bearing column and a square tube seat are installed on the rear pillar. The square tube seat on each front pillar and the square tube seat on the rear pillar are installed on a longitudinal support tube, and both ends of each transverse support tube are installed on a longitudinal support tube through a semi-detachable T-shaped three-way connector.

[0024] Furthermore, a fixing screw is provided on the semi-detachable T-shaped three-way connector, the semi-detachable T-shaped three-way connector is sleeved on the longitudinal support tube, and the semi-detachable T-shaped three-way connector is fixed to the longitudinal support tube by the fixing screw.

[0025] Beneficial effects of the present invention:

[0026] 1. The detachable hydrofoil attack angle adjustment device of the deformable small waterplane area catamaran ship model of the present invention solves the problem that the horizontal rotation angle and the incoming flow attack angle of the hydrofoil of the deformable small waterplane area catamaran ship model cannot be effectively adjusted manually after the shape of the deformable small waterplane area catamaran ship model is transformed. The present invention has the advantages of simple disassembly, high angle of attack adjustment accuracy, and reliable device, and can be widely used in single-shape and deformable shape ship model tests with hydrofoils or stabilizing fins.

[0027] 2. The most significant benefit of the present invention is that the horizontal angle of the hydrofoil can be adjusted accordingly according to the rotation angle of the pillars after the shape of the deformable small waterplane area catamaran model is transformed, and disassembly is convenient.

[0028] 3. The design of the angle of attack disc 19, the stop nut 20, the stop screw 23 and the angle of attack adjustment scale in the angle of attack adjustment assembly 7 of the present invention can meet the demand for precise adjustment of different angles of attack of the hydrofoil in the ship model test.

[0029] 4. The structural parts of the present invention are simple and easy to process, which can avoid the problem of high manufacturing cost caused by mass production of hydrofoil assemblies with different horizontal angles and different angles of attack.

[0030] 5. The present invention adopts a design of internal and external opposite rotation directions for the internal thread connecting the insert connecting shaft 16 and the hydrofoil connecting shaft 18 and the thread of the external connecting stop nut 20, which can ensure the formation of reverse torque to offset the torque of the hydrodynamic pressure acting on the hydrofoil, so that the hydrofoil does not rotate, the hydrofoil as a whole is more stable, and the device is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an axonometric view of a deformable small waterplane area catamaran ship model with a detachable hydrofoil angle of attack adjustment mechanism;

[0032] Figure 2 It is an isometric view of the detachable hydrofoil attack angle adjustment mechanism when the left sheet 1a maintains a vertical 0° configuration;

[0033] Figure 3is an isometric view of the detachable hydrofoil attack angle adjustment mechanism when the left sheet 1a is unfolded outward at 40°;

[0034] Figure 4 is an axonometric view of the left rear detachable hydrofoil attack angle adjustment component 2 corresponding to the 0° configuration;

[0035] Figure 5 is an axonometric view of the left rear detachable hydrofoil attack angle adjustment component 2 corresponding to the 40° configuration;

[0036] Figure 6 It is a full cross-sectional view in the vertical direction of the left rear detachable hydrofoil attack angle adjustment component 2 corresponding to the 0° configuration;

[0037] Figure 7 It is a full cross-sectional view in the horizontal direction of the left rear detachable hydrofoil attack angle adjustment component 2 corresponding to the 0° configuration;

[0038] Figure 8 It is a partially enlarged isometric view of the hydrofoil connection shaft 18 of the left rear detachable hydrofoil angle of attack adjustment component 2;

[0039] Fig. 9 It is an axonometric view of the insert block 15 and the embedded connecting plate 14 in the left rear detachable hydrofoil angle of attack adjustment component 2. DETAILED DESCRIPTION

[0040] Specific implementation method 1: Combination Figure 1-Figure 9 The present embodiment is described. The present embodiment is a detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model, which comprises a main hull 1 and a detachable hydrofoil attack angle adjustment mechanism. The main hull 1 comprises a left sheet 1a, a right sheet 1b, a group of longitudinal support tubes 35 and a group of transverse support tubes 36.

[0041] A group of longitudinal support tubes 35 are installed above the left sheet 1a and the right sheet 1b, a group of transverse support tubes 36 are installed on the group of longitudinal support tubes 35, and a detachable hydrofoil angle of attack adjustment mechanism is installed on the left sheet 1a and the right sheet 1b.

[0042] Specific implementation method 2: Combination Figure 1 The present embodiment is described. The present embodiment is a detachable hydrofoil angle adjustment device for a deformable small waterplane area catamaran ship model. The left sheet 1a and the right sheet 1b have the same structure. The left sheet 1a includes a front support 11, a rear support 12 and an underwater submersible 13. A set of longitudinal support tubes 35 includes two longitudinal support tubes, and a set of transverse support tubes 36 includes two transverse support tubes.

[0043] Each longitudinal support tube is mounted on the front support 11 and the rear support 12, and the front support 11 and the rear support 12 are mounted on the underwater submersible 13, the two transverse support tubes are mounted on the two longitudinal support tubes, and the detachable hydrofoil attack angle adjustment mechanism is mounted on the two underwater submersible 13. Other methods are the same as the first embodiment.

[0044] In this embodiment, the midship section of the underwater submersible 13 is a straight section, the bow and stern sections are curved sections with a certain curvature, the cross-sections of the front pillar 11 and the rear pillar 12 are both airfoil-shaped, the entire ship adopts a fiberglass shell, and foam is used as a filling matrix. Such an arrangement can ensure the structural strength of the ship model during the test.

[0045] Specific implementation method three: Combination Figure 1-Figure 3 The present embodiment is described. The present embodiment is a detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model. The detachable hydrofoil attack angle adjustment mechanism comprises a left rear detachable hydrofoil attack angle adjustment component 2, a left front detachable hydrofoil attack angle adjustment component 3, a right rear detachable hydrofoil attack angle adjustment component 4 and a right front detachable hydrofoil attack angle adjustment component 5;

[0046] The left rear detachable hydrofoil angle of attack adjustment component 2 is mounted on the inner side of the underwater submersible body 13 on the left sheet 1a near the rear end, the left front detachable hydrofoil angle of attack adjustment component 3 is mounted on the inner side of the underwater submersible body 13 on the left sheet 1a near the front end, the right rear detachable hydrofoil angle of attack adjustment component 4 is mounted on the inner side of the underwater submersible body 13 on the right sheet 1b near the rear end, and the right front detachable hydrofoil angle of attack adjustment component 5 is mounted on the inner side of the underwater submersible body 13 on the right sheet 1b near the front end. Other methods are the same as those in the second embodiment.

[0047] Specific implementation method four: Combination Figure 1-Figure 9 The present embodiment is described. The present embodiment is a detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model. The left rear detachable hydrofoil attack angle adjustment component 2, the left front detachable hydrofoil attack angle adjustment component 3, the right rear detachable hydrofoil attack angle adjustment component 4 and the right front detachable hydrofoil attack angle adjustment component 5 have the same structure. The left rear detachable hydrofoil attack angle adjustment component 2 includes a hydrofoil detachable component 6, an attack angle adjustment component 7 and a hydrofoil 22.

[0048] The hydrofoil 22 is mounted on the side wall of the underwater submersible body 13 through the detachable hydrofoil assembly 6, and the angle of attack adjustment assembly 7 is mounted on the detachable hydrofoil assembly 6. Other methods are the same as those in the third embodiment.

[0049] Specific implementation method five: combination Figure 6-Figure 9The present embodiment is described as a detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model, wherein the hydrofoil detachable assembly 6 includes a connecting plate 14, an insert 15, an insert connecting shaft 16, a locking pin 17, a hydrofoil connecting shaft 18 and a hydrofoil locking rod 37;

[0050] The connecting plate 14 is an arc-shaped plate, the insert block 15 is an arc-shaped block, the inner arc surface of the insert block 15 is matched with the outer arc surface of the connecting plate 14, the insert block 15 is installed on the connecting plate 14, and the connecting plate 14 is fixedly installed on the underwater submerged body 13. The arc surface of the insert block 15 is processed along the arc direction with a 0° through hole 30a, a 10° through hole 30b and a 40° through hole 30c, and the side wall of the insert block 15 is processed with a 0° lock pin hole 31a, a 10° lock pin hole 30b and a 40° lock pin hole 31c, and the center of the 0° lock pin hole 31a, the 10° lock pin hole 30b and the 40° lock pin hole 30c is The line is arranged parallel to the center line of the insert 15, the 0° through hole 30a intersects with the 0° locking pin hole 31a, the 10° through hole 30b intersects with the 10° locking pin hole 30b, and the 40° through hole 30c intersects with the 40° locking pin hole 31c. One end of the insert connecting shaft 16 is inserted into the 0° through hole 30a, and the locking pin 17 is inserted into the 0° locking pin hole 31a and one end of the insert connecting shaft 16. The other end of the insert connecting shaft 16 is connected to one end of the hydrofoil connecting shaft 18, and the other end of the hydrofoil connecting shaft 18 is installed in the hydrofoil locking rod hole of the hydrofoil 22 through the hydrofoil locking rod 37. Other methods are the same as those in the fourth embodiment.

[0051] In this embodiment, the left rear detachable hydrofoil attack angle adjustment component 2 is connected to the connecting plate 14 installed inside the underwater submersible body 13 through the insert 15 to achieve the adjustment of the horizontal angle of the left rear hydrofoil 22. An arc groove is processed on the underwater submersible body 13, and the connecting plate 14 is pasted in the arc groove of the underwater submersible body 13 by gluing. The angle formed by the center line of the 0° form through hole 30a and the center line of the 10° form through hole 30b is 10°, and the angle formed by the center line of the 0° form through hole 30a and the center line of the 40° form through hole 30c is 40°. One end of the insert block connecting shaft 16 is locked in the corresponding form through hole through the locking pin 17, and the hydrofoil connecting shaft 18 is detachably locked on the hydrofoil 22 through the hydrofoil locking rod 37. The horizontal angle of the hydrofoil 22 can be adjusted by the combined action of the insert block connecting shaft 16, the locking pin 17, the form through hole, and the form locking pin hole.

[0052] Specific implementation method six: Combination Figure 6-Figure 9This embodiment is described. In this embodiment, a detachable hydrofoil attack angle adjustment device for a deformable small waterplane area catamaran ship model is provided. An external thread is processed on the hydrofoil connecting shaft 18, and an internal thread hole is processed on the insert connecting shaft 16. The external thread of the hydrofoil connecting shaft 18 is threadedly connected with the internal thread hole of the insert connecting shaft 16. An attack angle adjustment scale is processed on the insert connecting shaft 16. Other methods are the same as those in the fourth embodiment.

[0053] Specific implementation method seven: Combination Figure 6-Figure 9 The present embodiment is described as a detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model, wherein the attack angle adjustment assembly 7 includes an attack angle disc 19, a stop nut 20, a spring washer 21 and a plurality of stop screws 23;

[0054] The outer wall of the internal threaded hole of the insert connecting shaft 16 is processed with an external thread, the angle attack disc 19 is fixedly sleeved on the hydrofoil connecting shaft 18, the stop nut 20 is sleeved on the external thread of the insert connecting shaft 16, the spring washer 21 is sleeved on the hydrofoil connecting shaft 18, and the spring washer 21 is located on the angle attack disc 19 and the stop nut 20, and the angle attack disc 19 and the stop nut 20 are fixedly connected by multiple stop screws 23.

[0055] The attack angle disc 19 and the stop nut 20 are locked and fixed by multiple stop screws 23. Other methods are the same as those in the sixth embodiment.

[0056] In this embodiment, the angle of attack of the hydrofoil 22 is adjusted by locking the angle of attack disc 19 and the stop nut 20 through the angle of attack adjustment scale on the insert connecting shaft 16 and the stop nut 20 in combination with the stop screw 23.

[0057] The internal thread connecting the block connecting shaft 16 and the hydrofoil connecting shaft 18 and the thread of the external connecting stop nut 20 are designed with internal and external opposite rotation directions, which can form a resistance torque opposite to the hydrodynamic pressure torque suffered by the hydrofoil 22, thereby ensuring that the hydrofoil 22 does not rotate during the test. The rotation angle of the angle of attack disk 19 and the stop nut 20 is adjusted with reference to the angle of attack adjustment scale on the block connecting shaft 16 to achieve precise adjustment of different angles of attack of the hydrofoil 22.

[0058] Specific implementation method eight: Combination Figure 6-Figure 9 The present embodiment is described. The present embodiment is a detachable hydrofoil angle of attack adjustment device for a deformable small waterplane area catamaran ship model. The upper side of the outer circumferential surface of the insert block 15 is processed with an insert block stud upper hole 26, the lower side of the outer circumferential surface of the insert block 15 is processed with an insert block stud lower hole 27, the upper side of the outer circumferential surface of the connecting plate 14 is processed with a connecting plate upper threaded hole 28, the lower side of the outer circumferential surface of the connecting plate 14 is processed with a connecting plate lower threaded hole 29, and a screw is respectively provided in the insert block stud upper hole 26 and the insert block stud lower hole 27.

[0059] The insert stud upper hole 26 of the insert 15 is arranged correspondingly to the threaded hole 28 on the connecting plate of the connecting plate 14, and the screw is installed on the insert stud upper hole 26 and the threaded hole 28 on the connecting plate, and the insert stud lower hole 27 of the insert 15 is arranged correspondingly to the connecting plate lower threaded hole 29 of the connecting plate 14, and the screw is installed on the insert stud lower hole 27 and the connecting plate lower threaded hole 29. Ensure that the insert 15 is firmly connected to the connecting plate 14. Other methods are the same as those in the sixth embodiment.

[0060] Specific implementation method nine: Combination Figure 1 The present embodiment is described as a detachable hydrofoil angle adjustment device for a deformable small waterplane area catamaran ship model, which further comprises a plurality of load-bearing columns 8, a plurality of square tube seats 9 and a plurality of semi-detachable T-shaped three-way connectors 10;

[0061] The front support 11 is provided with a load-bearing column 8 and a square tube seat 9, and the rear support 12 is provided with a load-bearing column 8 and a square tube seat 9. The square tube seat 9 on each front support 11 and the square tube seat 9 on the rear support 12 are installed on a longitudinal support tube, and both ends of each transverse support tube are installed on a longitudinal support tube through a semi-detachable T-shaped three-way connector 10. Other methods are the same as those in the second specific implementation.

[0062] Specific implementation method ten: Combination Figure 1 This embodiment is described. In this embodiment, a detachable hydrofoil angle adjustment device for a deformable small waterplane area catamaran ship model is provided. A fixing screw is provided on a semi-detachable T-type three-way connector 10. The semi-detachable T-type three-way connector 10 is sleeved on a longitudinal support pipe. The semi-detachable T-type three-way connector 10 is fixed on the longitudinal support pipe by a fixing screw. Other methods are the same as those in the ninth embodiment.

[0063] In this embodiment, the semi-detachable T-type three-way connector 10 is semi-detachable through a rotary hinge, and can be threadedly connected to the corresponding holes on the longitudinal support tube group 11, the transverse support tube group 12 and the vertical support tube group 13 by using a fixing screw 20 for fixing. When the form is changed, it is only necessary to remove the semi-detachable T-type three-way connector 10 and change the direction of its lower interface, and at the same time rotate the left sheet 4a and the right sheet 4b of the main hull 1, and then use the fixing screw 20 to connect and fix the multiple semi-detachable T-type three-way connectors 10 at the front and rear of the main hull 1 to the transverse support tube group 12.

[0064] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the present invention. The protection scope of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. Each implementation scheme within its scope shall be subject to the constraints of the present invention.

Claims

1. A detachable hydrofoil attack angle adjustment device for a deformable small waterplane area catamaran ship model, characterized in that: It comprises a main hull (1) and a detachable hydrofoil attack angle adjustment mechanism, wherein the main hull (1) comprises a left sheet (1a), a right sheet (1b), a group of longitudinal support tubes (35) and a group of transverse support tubes (36); A group of longitudinal support tubes (35) are installed above the left sheet body (1a) and the right sheet body (1b), a group of transverse support tubes (36) are installed on the group of longitudinal support tubes (35), and a detachable hydrofoil angle of attack adjustment mechanism is installed on the left sheet body (1a) and the right sheet body (1b).

2. The detachable hydrofoil angle of attack adjustment device of a deformable small waterplane area catamaran ship model according to claim 1, characterized in that: The left sheet body (1a) and the right sheet body (1b) have the same structure. The left sheet body (1a) comprises a front support (11), a rear support (12) and an underwater submersible body (13). A set of longitudinal support tubes (35) comprises two longitudinal support tubes, and a set of transverse support tubes (36) comprises two transverse support tubes. Each longitudinal support tube is mounted on a front support (11) and a rear support (12), and the front support (11) and the rear support (12) are mounted on an underwater submersible (13), two transverse support tubes are mounted on two longitudinal support tubes, and a detachable hydrofoil angle of attack adjustment mechanism is mounted on the two underwater submersibles (13).

3. The detachable hydrofoil angle of attack adjustment device of a deformable small waterplane area catamaran ship model according to claim 2, characterized in that: The detachable hydrofoil angle of attack adjustment mechanism comprises a left rear detachable hydrofoil angle of attack adjustment component (2), a left front detachable hydrofoil angle of attack adjustment component (3), a right rear detachable hydrofoil angle of attack adjustment component (4) and a right front detachable hydrofoil angle of attack adjustment component (5); The left rear detachable hydrofoil angle of attack adjustment component (2) is mounted on the inner side of the underwater submersible body (13) on the left sheet body (1a) near the rear end, the left front detachable hydrofoil angle of attack adjustment component (3) is mounted on the inner side of the underwater submersible body (13) on the left sheet body (1a) near the front end, the right rear detachable hydrofoil angle of attack adjustment component (4) is mounted on the inner side of the underwater submersible body (13) on the right sheet body (1b) near the rear end, and the right front detachable hydrofoil angle of attack adjustment component (5) is mounted on the inner side of the underwater submersible body (13) on the right sheet body (1b) near the front end.

4. The detachable hydrofoil angle of attack adjustment device of a deformable small waterplane area catamaran ship model according to claim 3, characterized in that: The left rear detachable hydrofoil angle of attack adjustment component (2), the left front detachable hydrofoil angle of attack adjustment component (3), the right rear detachable hydrofoil angle of attack adjustment component (4) and the right front detachable hydrofoil angle of attack adjustment component (5) have the same structure, and the left rear detachable hydrofoil angle of attack adjustment component (2) comprises a hydrofoil detachable assembly (6), an angle of attack adjustment assembly (7) and a hydrofoil (22); The hydrofoil (22) is mounted on the side wall of the underwater submersible body (13) via a detachable hydrofoil assembly (6), and the angle of attack adjustment assembly (7) is mounted on the detachable hydrofoil assembly (6).

5. The detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model according to claim 4, characterized in that: The hydrofoil detachable assembly (6) comprises a connecting plate (14), an insert (15), an insert connecting shaft (16), a locking pin (17), a hydrofoil connecting shaft (18) and a hydrofoil locking rod (37); The connecting plate (14) is an arc-shaped plate, the insert block (15) is an arc-shaped block, the inner arc surface of the insert block (15) is matched with the outer arc surface of the connecting plate (14), the insert block (15) is mounted on the connecting plate (14), and the connecting plate (14) is fixedly mounted on the underwater submersible body (13), the arc-shaped surface of the insert block (15) is processed with a 0° through hole (30a), a 10° through hole (30b) and a 40° through hole (30c) along the arc direction, the side wall of the insert block (15) is processed with a 0° locking pin hole (31a), a 10° locking pin hole (30b) and a 40° locking pin hole (31c), and the 0° locking pin hole (31a), the 10° locking pin hole (30b) and the 40° locking pin hole (30c) are The center line is arranged parallel to the center line of the insert (15); the 0° through hole (30a) intersects with the 0° locking pin hole (31a); the 10° through hole (30b) intersects with the 10° locking pin hole (30b); the 40° through hole (30c) intersects with the 40° locking pin hole (31c); one end of the insert connecting shaft (16) is inserted into the 0° through hole (30a); the locking pin (17) is inserted into the 0° locking pin hole (31a) and one end of the insert connecting shaft (16); the other end of the insert connecting shaft (16) is connected to one end of the hydrofoil connecting shaft (18); and the other end of the hydrofoil connecting shaft (18) is installed in the hydrofoil locking rod hole of the hydrofoil (22) through the hydrofoil locking rod (37).

6. The detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model according to claim 4, characterized in that: An external thread is processed on the hydrofoil connecting shaft (18), and an internal thread hole is processed on the insert connecting shaft (16). The external thread of the hydrofoil connecting shaft (18) is threadedly connected with the internal thread hole of the insert connecting shaft (16).

7. The detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model according to claim 6, characterized in that: The attack angle adjustment assembly (7) comprises an attack angle disc (19), a stop nut (20), a spring washer (21) and a plurality of stop screws (23); The outer wall of the internal thread hole of the insert connecting shaft (16) is processed with an external thread, the angle-attack disc (19) is fixedly sleeved on the hydrofoil connecting shaft (18), the stop nut (20) is sleeved on the external thread of the insert connecting shaft (16), the spring washer (21) is sleeved on the hydrofoil connecting shaft (18), and the spring washer (21) is located on the angle-attack disc (19) and the stop nut (20), and the angle-attack disc (19) and the stop nut (20) are fixedly connected by a plurality of stop screws (23).

8. The detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model according to claim 6, characterized in that: The upper side of the outer cylindrical surface of the insert (15) is processed with an insert stud upper hole (26), the lower side of the outer cylindrical surface of the insert (15) is processed with an insert stud lower hole (27), the upper side of the outer cylindrical surface of the connecting plate (14) is processed with a connecting plate upper threaded hole (28), the lower side of the outer cylindrical surface of the connecting plate (14) is processed with a connecting plate lower threaded hole (29), and a screw is respectively arranged in the insert stud upper hole (26) and the insert stud lower hole (27). The insert stud upper hole (26) of the insert (15) is arranged correspondingly to the threaded hole (28) on the connecting plate of the connecting plate (14), and the screw rod is installed on the insert stud upper hole (26) and the threaded hole (28) on the connecting plate; the insert stud lower hole (27) of the insert (15) is arranged correspondingly to the connecting plate lower threaded hole (29) of the connecting plate (14), and the screw rod is installed on the insert stud lower hole (27) and the connecting plate lower threaded hole (29).

9. The detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model according to claim 2, characterized in that: It also includes a plurality of load-bearing columns (8), a plurality of square tube seats (9) and a plurality of semi-detachable T-shaped three-way connectors (10); A load-bearing column (8) and a square tube seat (9) are installed on the front pillar (11), and a load-bearing column (8) and a square tube seat (9) are installed on the rear pillar (12). The square tube seat (9) on each front pillar (11) and the square tube seat (9) on the rear pillar (12) are installed on a longitudinal support tube, and both ends of each transverse support tube are installed on a longitudinal support tube through a semi-detachable T-shaped three-way connector (10).

10. The detachable hydrofoil attack angle adjustment device of a deformable small waterplane area catamaran ship model according to claim 9, characterized in that: A fixing screw is provided on the semi-detachable T-shaped three-way connector (10), the semi-detachable T-shaped three-way connector (10) is sleeved on the longitudinal support pipe, and the semi-detachable T-shaped three-way connector (10) is fixed on the longitudinal support pipe by the fixing screw.

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