Single-motor multi-paddle ship model self-propulsion test device and shafting parallel module

Abstract

The invention belongs to the technical field of test measurement, and discloses a single-motor multi-paddle ship model self-propulsion test device and a shafting parallel module. The shafting parallel connection module comprises a driving rotating device and combined driven rotating devices arranged on the two sides of the driving rotating device respectively. Each group of combined driven rotating devices comprises a first driven rotating device and a second driven rotating device, the driving rotating device is connected with the first driven rotating device through a rotating connecting device, and the first driven rotating device is connected with the second driven rotating device through a rotating connecting device. Meanwhile, the single-motor multi-paddle ship model self-propulsion test device is designed based on the shafting parallel module, and shafting connection and transmission during the single-motor multi-paddle ship model self-propulsion test can be realized. The shafting parallel module can quickly adapt to any propeller spacing within a certain range, reduces installation and adjustment redundancy, is high in transmission efficiency, and can be used for completing ship model self-propulsion tests to carry out research on the ship propulsion efficiency and the matching problem of ship machines and propellers.

Description

Technical Field

[0001] The present invention belongs to the technical field related to test measurement, and more specifically, relates to a single-motor multi-propeller ship model self-propulsion test device and a shaft system parallel module. Background Art

[0002] For ocean-going ships, the water depth is relatively large, so single-propeller propulsion is often used; for inland ships, the need for navigation in narrow and complex waters is relatively large, and sufficient maneuverability is required, so double propellers or a larger number of propellers are often used; for some ships with special military purposes, in order to achieve higher speeds and maneuverability, multi-propeller designs are also used. For ships using multi-propeller solutions, the wake fraction, thrust reduction fraction, hull efficiency, relative rotation efficiency, and propulsion efficiency, which represent the interaction between the hull and the propeller, can be obtained relatively accurately through ship model self-propulsion tests during the design stage. Self-propulsion elements such as efficiency can be obtained, and the actual ship speed prediction can be completed, and the matching of the ship, engine, and propeller can be evaluated.

[0003] When conducting self-propulsion tests, a certain scale ratio is selected to complete the processing of the ship model and propeller model. At the same time, it is necessary to simulate the actual ship propulsion process, arrange the servo motor and propeller dynamometer in the model in sequence, and complete the shaft system installation. For multi-propeller ships, the outer propellers are generally designed to rotate outward, that is, looking from the stern to the bow, the left propeller rotates counterclockwise and the right propeller rotates clockwise. In the model preparation stage, it is necessary to arrange the same number of propeller dynamometers as the number of propellers. The propeller dynamometers and the propeller shafts are in the same straight line to measure the thrust and torque generated when the corresponding propeller shafts rotate. Limited by the internal space of the ship model, and in order to ensure that all propellers maintain the same speed, a single motor can be used in conjunction with a shaft system parallel device to achieve synchronous rotation of the multi-propeller model. Since the propeller spacing of different ship models is different, the propeller dynamometer spacing inside the hull is also different. The shaft system parallel device needs to be matched with reference to this spacing, and no misalignment can occur. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a single-motor multi-propeller ship model self-propulsion test device and a shaft system parallel module, the purpose of which is to achieve length design through the angles between the transmission devices of the shaft system parallel module, so as to complete the precise positioning and installation of multiple devices and simultaneous transmission, thereby solving the current defects of inconvenient adjustment of the shaft system spacing and low shaft system transmission efficiency during the self-propulsion test installation of the single-motor multi-propeller ship model.

[0005] To achieve the above object, according to a first aspect of the present invention, a shaft system parallel module is provided, comprising: an active rotating device, two groups of combined driven rotating devices, and the two groups of combined driven rotating devices are respectively arranged on both sides of the active rotating device;

[0006] Each group of combined driven rotating devices includes a first driven rotating device and a second driven rotating device, and the active rotating device and the first driven rotating device, as well as the first driven rotating device and the second driven rotating device are all connected via a rotating connection device.

[0007] As a preferred embodiment of the present invention, the active rotating device includes an active rotating device shaft system and a single active rotating device gear; the first driven rotating device and the second driven rotating device each include a driven rotating device shaft system and a plurality of sequentially meshed gears arranged on the driven rotating device shaft system; the rotary connecting device includes a first rotary connecting device and a second rotary connecting device;

[0008] The active rotating device and the first driven rotating device are connected and fixed by a first rotating connecting device, and the gear of the active rotating device is meshed with the gear at one end of the first driven rotating device; the first driven rotating device and the second driven rotating device are connected and fixed by a second rotating connecting device, and the gear at the other end of the first driven rotating device is meshed with the gear at one end of the second driven rotating device.

[0009] As a preferred embodiment of the present invention, the rotating connection device is in the form of a snap ring hinge, so that the rotating connection device rotates around the center of the shaft system connected to its two ends, and then is fixed to the shaft system at its two ends by locking.

[0010] As a preferred embodiment of the present invention, the lengths of the first driven rotating device and the second driven rotating device are both adjusted by configuring the number of gears.

[0011] As a preferred embodiment of the present invention, the second driven rotating device includes a second driven rotating device shaft system and a plurality of sequentially meshing gears arranged on the second driven rotating device shaft system; wherein different positions on the second driven rotating device shaft system are connected to other devices to adjust the length.

[0012] According to a second aspect of the present invention, a single-motor multi-propeller ship model self-propulsion test device is provided, comprising:

[0013] Ship model body;

[0014] A propeller model arranged outside the ship model body;

[0015] A propeller shaft system, a propeller dynamometer, a servo motor and a shaft system parallel module as described in the first aspect of the present invention are arranged inside the ship model body; wherein the propeller shaft system runs through the hull of the ship model body, one end is connected to the propeller dynamometer, and the other end is connected to the propeller model; the servo motor is electronically controlled to realize forward and reverse rotation direction and speed control, and is connected to the propeller dynamometer through the shaft system parallel module.

[0016] As a preferred embodiment of the present invention, the servo motor is connected to the propeller dynamometer via the shafting parallel module, specifically comprising: the servo motor is connected to the active rotating device via the shafting of the active rotating device in the shafting parallel module, and the propeller dynamometer is connected to the second driven rotating device via the shafting of the second driven rotating device in the shafting parallel module.

[0017] As a preferred embodiment of the present invention, the propeller dynamometer is connected to different positions of the shaft system of the second driven rotating device to adjust the transmission distance of the second driven rotating device.

[0018] As a preferred embodiment of the present invention, the shafting parallel module is arranged at a height of the inner bottom surface of the ship model body so that the propeller dynamometer and the shafting of the second driven rotating device are in the same straight line.

[0019] In general, the above technical solution conceived by the present invention has the following technical advantages compared with the prior art:

[0020] (1) The shaft system parallel module in the present invention cooperates with the rotary connection device to adjust the angle θ between the active rotary device and the driven rotary device, and finally realizes rapid adaptation of any spacing within a certain range; and a group of driven rotary devices drives at least two groups of driven rotary devices at the same time, thereby improving the efficiency of synchronous transmission. In particular, as the transmission shaft of the propeller of a multi-propeller ship, it fully considers the characteristics of different propeller spacings of different multi-propeller ships, opposite rotation directions of the side propellers, and the limitations of the internal space of the ship body. Through the combined transmission in the shaft system parallel module, the rotary connection device is cooperated to complete the precise positioning, installation and simultaneous transmission of multiple devices.

[0021] (2) Preferably, the driven rotating device in the shaft system parallel module is composed of a plurality of gears, thereby the angle design between the driven rotating devices and the number of gears are coordinated to achieve flexible configuration of the structural layout and length design of the shaft system in space.

[0022] In summary, the present invention proposes a shafting connection device for a single-motor multi-propeller ship model self-propulsion test. Aiming at the problems of low shafting positioning accuracy, complicated installation and excessive redundancy in the preparation and installation process of the current ship model single-motor multi-propeller self-propulsion test, a shafting parallel device is used to achieve fast and accurate matching of multi-propeller self-propulsion tests with different spacings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A cross-sectional view of a multi-propeller ship shafting parallel device according to an example of the present invention;

[0024] Figure 2 This is a cross-sectional view of a multi-propeller ship shafting parallel device according to an example of the present invention;

[0025] Figure 3 This is a cross-sectional view of the multi-propeller ship shafting parallel device after adjusting the shafting spacing according to an example of the present invention;

[0026] Figure 4 This is a schematic diagram of the use and layout of a single-motor multi-propeller self-propelled test device according to an example of the present invention;

[0027] Figure 5 A schematic cross-sectional view of a multi-propeller ship model and a propeller model according to an example of the present invention;

[0028] Figure 6 The cross-sectional schematic diagram of a multi-propeller ship propeller dynamometer according to an example of the present invention.

[0029] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0030] 1-ship model body, 2-propeller model, 3-propeller shaft system, 4-propeller dynamometer, 5-servo motor, 6-active rotating device, 7-active rotating device shaft system, 8-active rotating device gear, 9-first rotating connecting device 1, 10-first driven rotating device, 11-first driven rotating device shaft system, 12-first driven rotating device gear, 13-second driven rotating device, 14-second driven rotating device shaft system, 15-second driven rotating device gear, 16-second rotating connecting device. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figure 1 As shown, the shaft system parallel module completes the design of the transmission length of the shaft system parallel module by adjusting the angle between the transmission devices. The device includes: an active rotating device 6, and a combined driven rotating device arranged on both sides of the active rotating device 6; each group of combined driven rotating devices includes a first driven rotating device 10 and a second driven rotating device 13, and the active rotating device 6 and the first driven rotating device 10, and the first driven rotating device 10 and the second driven rotating device 13 are all connected through a rotating connection device.

[0033] In some embodiments, Figure 2 , Figure 3As shown, the active rotating device 6 includes an active rotating device shaft system 7 and a single active rotating device gear 8, the first driven rotating device 10 and the second driven rotating device 13 each independently include a driven rotating device shaft system and a plurality of sequentially meshing gears arranged on the same driven rotating device shaft system; the rotating connecting device includes a first rotating connecting device 9 and a second rotating connecting device 16. Specifically, the active rotating device 6 and the first driven rotating device 10 are connected and fixed by the first rotating connecting device 9, and the active rotating device gear 8 is meshed with the first driven rotating device gear 12 at the starting end of the first driven rotating device, so as to ensure that the active rotating device gear 8 and the first driven rotating device gear 12 at the starting end are always kept in a meshing state when rotating at different angles; the first driven rotating device 10 and the second driven rotating device 13 are connected and fixed by the second rotating connecting device 16, and the first driven rotating device gear 12 at the end of the first driven rotating device is meshed with the second driven rotating device gear 15 at one end of the second driven rotating device, so as to ensure that the first driven rotating device gear 12 at the end and the second driven rotating device gear 15 at one end are always kept in a meshing state when rotating at different angles, thereby driving the rotation of the driven rotating device gear through the rotation of the active rotating device gear to complete the power transmission.

[0034] The shaft system parallel module of the present invention is applied to a single-motor self-propelled ship model, the active rotating device 6 is connected to the servo motor 5 shaft system through the active rotating device shaft system 7, and obtains the power source from the servo motor 5; the active rotating device 6 and the first driven rotating device 10 are connected and fixed through the first rotating connection device 9, the active rotating device gear 8 is matched with the first driven rotating device gear set 12, and the power is transmitted to the first driven rotating device 10; the first driven rotating device 10 and the second driven rotating device 13 are connected and fixed through the second rotating connection device 16, the first driven rotating device gear 12 is matched with the second driven rotating device gear 15, and the power is transmitted to the second driven rotating device 13 along the first gear to the last gear of the first driven rotating device; the second driven rotating device 13 is connected to the propeller dynamometer 4 shaft system through the second driven rotating device shaft system 14, driving the propeller model 2 to rotate.

[0035] In some embodiments, the rotary connection device is in the form of a snap ring hinge, which can rotate around the center of the shaft system at both ends of the connection device and achieve locking and fixing. By adjusting the angle between the active rotary device 6 and the first driven rotary device 10, and the angle between the first driven rotary device 10 and the second driven rotary device 13, the transmission spacing (l2 or l3) between the active rotary device 6 and the second driven rotary device 13, and the transmission spacing (d) of the shaft system parallel module can be adjusted.

[0036] In some embodiments, the first rotating connecting device 9 is fixed to the main body of the active rotating device 6 and the first driven rotating device main body 10 respectively by means of a retaining ring, and the second rotating connecting device 16 is fixed to the first driven rotating device main body 10 and the second driven rotating device main body 13 respectively by means of a retaining ring, so as to complete the rotation angle adjustment and locking, and ensure that the active rotating device gear and the first driven rotating device gear are always tightly engaged with each other during the rotation adjustment process, and the first driven rotating device gear and the second driven rotating device gear are always tightly engaged with each other, so as to realize efficient transmission of rotation.

[0037] In some embodiments, the second driven rotating device 13 includes a second driven rotating device shaft system 14 and a plurality of sequentially meshed gears arranged on the second driven rotating device shaft system 14, so that the second driven rotating device 13 is connected to the propeller dynamometer through the second driven rotating device shaft system 14, and the transmission distance of the second driven rotating device is adjusted by selecting gears at different positions.

[0038] The following example illustrates the relationship between the adjustment of the rotating connection device and the total transmission length of the shaft system parallel module. 1) By adjusting the connection angle between the active rotating device 6 and the first driven rotating device 10, the angle θ between the first driven rotating device 10 and the second driven rotating device 13; 2) Selecting a suitable second driven rotating device (involving driven devices with different numbers of gears) to form an inward or outward rotating shaft combination; 3) Fixing the second driven rotating devices 13 on the left and right sides to the bottom plate of the ship model, and locking the first rotating connection device 9 and the second rotating connection device 16 in turn; 4) Complete the parallel installation and fixation of the multi-propeller shaft system.

[0039] Assume that the width of the first driven rotating device 10 is L, the width of the active rotating device 6 is l1, the distance from the active rotating device 6 to the second driven rotating device 13 on the left is l2, the distance from the active rotating device 6 to the second driven rotating device 13 on the right is l3, the transmission distance of the second driven rotating device 13 is l4, and the total transmission distance of the shaft system parallel module is d;

[0040] By adjusting the angle θ between the first driven rotating device 10 and the extension line of the second driven rotating device 13, the distance l2 from the active rotating device 6 to the left second driven rotating device 13 (i.e. the horizontal projection length of the first driven rotating device 10) is:

[0041] l2=L·cosθ.

[0042] Select a suitable inward or outward rotation shaft system 14 combination on the second driven rotating device 13, and the transmission spacing (i.e., the horizontal width spacing between the left and right propellers) d of the shaft system parallel module is

[0043] d=l1+2l2+l3+l4=l1+2L·cosθ+l3+l4.

[0044] It can be seen that by adjusting the angle θ, d can be adapted to any pair of propeller pitches within a certain range.

[0045] It should be noted that the shaft system parallel module of the present invention is applied to a single-motor self-propelled ship model, the second driven rotating device is fixed to the bottom of the ship model, and the rotating connection device is used to adjust the angle θ between the active rotating device and the driven rotating device, ultimately achieving rapid adaptation of any spacing within a certain range.

[0046] like Figures 4 to 6 As shown, the present invention provides a single-motor multi-propeller ship model self-propulsion test device, comprising:

[0047] The ship model body 1 is manufactured according to a certain scale ratio λ based on the actual ship line shape, that is, the size of the ship body 1 is in a corresponding proportion to the actual ship shape, and the shape design, appendages, etc. of the ship body 1 are the same as those of the actual ship;

[0048] The propeller model 2 arranged inside the ship model body 1 is manufactured according to the same scale λ ratio as the propeller of the actual ship, that is, the propeller model 2 is proportional to the propeller of the actual ship, and the parameters such as the number of propellers, the number of blades, the disk ratio and the pitch ratio of the propeller model 2 are the same as those of the propeller of the actual ship;

[0049] The propeller shaft system 3, propeller dynamometer 4, servo motor 5 and shaft system parallel module provided in any embodiment of the present invention are arranged inside the ship model body 1. Among them, the number (sets) of propeller dynamometer 4 and propeller shaft system 3 is consistent with the number of propellers. The propeller dynamometer 4 passes through the hull of the ship model body 1 through the propeller shaft system 3 and is connected to the propeller model 2, which is used to measure the thrust and torque when the propeller rotates; the propeller shaft system passes through the hull to connect the propeller outside the hull and the propeller dynamometer inside the hull, and plays a role in transmitting rotation; the servo motor 5 is a single motor, which is controlled by electronic control to realize the forward and reverse rotation direction and speed control, and is connected to the propeller dynamometer 4 shaft system through the shaft system parallel module, which is used to provide a propeller rotation power source during the test. Specifically, the corresponding suitable driven rotating device 2 shaft system 14 in the shaft system parallel module is connected to each propeller dynamometer 4 to achieve the same rotation speed and the same rotation direction as the actual ship. The active rotating device shaft system 7 of the active rotating device 6 in the shaft system parallel module is connected to the servo motor 5 shaft system, which is used to connect the multi-propeller shaft systems in parallel. The rotation speed of the servo motor 5 is synchronously transmitted to the corresponding propeller dynamometer 4 and the propeller model 2 through the shaft system parallel module, so as to realize the synchronous rotation of the multi-propeller system by the rotation of a single motor.

[0050] In some embodiments, the servo motor 5 is connected to the active rotating device 6 via the active rotating device shaft system 7 in the shaft system parallel module, and the propeller dynamometer 4 is connected to the second driven rotating device 13 via the second driven rotating device shaft system 14 in the shaft system parallel module.

[0051] In some embodiments, the propeller dynamometer 3 is connected to the second driven rotating device shaft system 14 by selectively connecting to adjust the transmission distance of the second driven rotating device 13 .

[0052] In some embodiments, the shafting parallel module is arranged at a height of the inner bottom surface of the ship model body 1 so that the propeller dynamometer 4 and the shafting of the second driven rotating device 14 are in the same straight line.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the present invention and its equivalent technologies, the present invention is also intended to include these changes and variations. The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and their protection scope is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A shaft system parallel module, characterized in that: include: An active rotating device (6), and two groups of combined driven rotating devices, wherein the two groups of combined driven rotating devices are respectively arranged on both sides of the active rotating device (6); Each group of the combined driven rotating devices comprises a first driven rotating device (10) and a second driven rotating device (13), and the active rotating device (6) and the first driven rotating device (10), as well as the first driven rotating device (10) and the second driven rotating device (13) are all connected via a rotating connection device.

2. The shafting parallel module according to claim 1, characterized in that: The active rotating device (6) comprises an active rotating device shaft system (7) and a single active rotating device gear (8); the first driven rotating device (10) and the second driven rotating device (13) each comprise a driven rotating device shaft system and a plurality of gears arranged on the driven rotating device shaft system and meshing with each other in sequence; the rotary connection device comprises a first rotary connection device (9) and a second rotary connection device (16); The active rotating device (6) and the first driven rotating device (10) are connected and fixed via a first rotating connection device (9), and the gear (8) of the active rotating device is meshed with a gear at one end of the first driven rotating device (10); the first driven rotating device (10) and the second driven rotating device (13) are connected and fixed via a second rotating connection device (16), and the gear at the other end of the first driven rotating device (10) is meshed with a gear at one end of the second driven rotating device (13).

3. The shafting parallel module according to claim 1, characterized in that: The rotary connection device is in the form of a snap ring hinge, so that the rotary connection device rotates around the center of the shaft system connected to its two ends, and then is fixed to the shaft system at its two ends by locking.

4. The shafting parallel module according to claim 2, characterized in that: The lengths of the first driven rotating device (10) and the second driven rotating device (13) are both adjusted by configuring the number of gears.

5. The shafting parallel module according to claim 2, characterized in that: The second driven rotating device (13) comprises a second driven rotating device shaft system (14) and a plurality of gears meshing in sequence arranged on the second driven rotating device shaft system (14), wherein the second driven rotating device shaft system (14) is used to connect with other devices at different positions thereon to adjust the length.

6. A single-motor multi-propeller ship model self-propulsion test device, characterized in that: include: Ship model body(1); A propeller model (2) arranged outside the ship model body (1); A propeller shaft system (3), a propeller dynamometer (4), a servo motor (5) and a shaft system parallel module as described in any one of claims 1 to 5 are arranged inside the ship model body (1); wherein the propeller shaft system (3) passes through the hull of the ship model body (1), one end is connected to the propeller dynamometer (4), and the other end is connected to the propeller model (3); the servo motor (5) is electronically controlled to realize forward and reverse rotation direction and speed control, and is connected to the propeller dynamometer (3) through the shaft system parallel module.

7. The single-motor multi-propeller ship model self-propulsion test device according to claim 6 is characterized in that: The servo motor (5) is connected to the propeller dynamometer (4) via the shaft system parallel module, specifically comprising: the servo motor (5) is connected to the active rotating device (6) via the active rotating device shaft system (7) in the shaft system parallel module, and the propeller dynamometer (4) is connected to the second driven rotating device (13) via the second driven rotating device shaft system (14) in the shaft system parallel module.

8. The single-motor multi-propeller ship model self-propulsion test device according to claim 7 is characterized in that: The propeller dynamometer (4) is connected to different positions of the shaft system (14) of the second driven rotating device to adjust the transmission distance of the second driven rotating device (13).

9. The single-motor multi-propeller ship model self-propulsion test device according to claim 6 is characterized in that: The shafting parallel module is arranged at a height on the inner bottom surface of the ship model body (1) so that the propeller dynamometer (3) and the shafting of the second driven rotating device (14) are on the same straight line.

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