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

Abstract

The application belongs to the technical field of test measurement, and discloses a single-motor multi-propeller ship model self-propulsion test device and a shafting parallel module. The shafting parallel module comprises: a driving rotating device, combined driven rotating devices arranged on both sides of the driving rotating device; each group of the combined driven rotating devices comprises a first driven rotating device and a second driven rotating device, and the driving rotating device, the first driven rotating device and the second driven rotating device are connected through rotating connecting devices. Meanwhile, the single-motor multi-propeller ship model self-propulsion test device is designed based on the shafting parallel module, so that the shafting connection and transmission during the single-motor multi-propeller ship model self-propulsion test are realized. The shafting parallel module can quickly adapt to any propeller spacing within a certain range, reduces installation adjustment redundancy, has high transmission efficiency, and can be used to complete the ship model self-propulsion test and carry out research on ship propulsion efficiency and ship engine propeller matching.

Description

Technical Field

[0001] This invention belongs to the technical field of test measurement, and more specifically, relates to a self-propulsion test device for a single-motor multi-propeller ship model and a shafting parallel module. Background Technology

[0002] For ocean-going vessels, which navigate in deep waters, a single-propeller propulsion system is commonly used. Inland waterway vessels, navigating narrow and complex waters, require greater maneuverability and often employ twin or more propellers. Vessels with specific military applications may also utilize multi-propeller designs to achieve higher speeds and maneuverability. For vessels employing multi-propeller designs, self-propulsion tests using ship models during the design phase can accurately obtain self-propulsion parameters representing the interaction between the hull and propeller, such as wake fraction, thrust deduction fraction, hull efficiency, relative rotational efficiency, and propulsion efficiency. This allows for real-world speed prediction and evaluation of the ship-engine-propeller matching.

[0003] When conducting self-propulsion tests, a specific scale is selected for the fabrication of the ship model and propeller model. Simultaneously, the actual ship propulsion process needs to be simulated. Servo motors and propeller power units are sequentially arranged inside the model, and the shafting is installed. For multi-propeller ships, the outer propellers are generally designed for outward rotation; that is, viewed from the stern to the bow, the left propeller rotates counterclockwise, and the right propeller rotates clockwise. During the model preparation stage, the same number of propeller power units as the propellers needs to be installed, with the power units aligned with the propeller shafts. These units are used to measure the thrust and torque generated by the rotation of the corresponding propeller shafts. Due to space limitations within the ship model, and to ensure all propellers maintain the same rotational speed, a single motor combined with a parallel shafting system can be used to achieve synchronous rotation of the multi-propeller model. Since different ship models have different propeller pitches, the pitch of the propeller power units inside the hull also varies. The parallel shafting system must be matched to these pitches to avoid misalignment. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, the present invention provides a self-propulsion test device for a single-motor multi-propeller ship model and a shaft system parallel module. The purpose is to achieve the length design by using the angle between the transmission devices of the shaft system parallel module to complete the precise positioning and simultaneous transmission of multiple devices, thereby solving the defects of inconvenient adjustment of shaft system spacing and low shaft system transmission efficiency during the self-propulsion test installation of a single-motor multi-propeller ship model.

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

[0006] Each set of driven rotating devices includes a first driven rotating device and a second driven rotating device, and the driving rotating device is connected to the first driven rotating device, and the first driven rotating device is connected to the second driven rotating device through 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 drive the rotating device shaft system and a plurality of sequentially meshing gears disposed on the driven rotating device shaft system; the rotating connection device includes a first rotating connection device and a second rotating connection device;

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

[0009] As a preferred embodiment of the present invention, the rotary connecting device is a snap ring hinge type, which allows the rotary connecting device to rotate around the center of the shaft system connected to its two ends, and then be fixed to the shaft system at both ends by locking.

[0010] As a preferred embodiment of the present invention, both the first driven rotating device and the second driven rotating device adjust their length 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 gears meshing sequentially 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 self-propelled test apparatus for a single-motor multi-propeller boat model is provided, comprising:

[0013] ship model body;

[0014] A propeller model set outside the main body of the ship model;

[0015] The propeller shaft system, propeller power unit, servo motor, and shaft system parallel module as described in the first aspect of the present invention are disposed inside the ship model body; wherein, the propeller shaft system passes through the hull of the ship model body, one end is connected to the propeller power unit, and the other end is connected to the propeller model; the servo motor is electrically controlled to realize forward and reverse rotation and speed control, and is connected to the propeller power unit through the shaft system parallel module.

[0016] As a preferred embodiment of the present invention, the servo motor is connected to the propeller power unit through the shaft system parallel module, specifically including: the servo motor is connected to the active rotating device through the active rotating device shaft system in the shaft system parallel module, and the propeller power unit is connected to the second driven rotating device through the second driven rotating device shaft system in the shaft system parallel module.

[0017] As a preferred embodiment of the present invention, the propeller power unit is connected to different positions on 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 parallel shaft module adjusts its height on the bottom surface of the ship model body so that the propeller power unit and the second driven rotating device shaft are on the same straight line.

[0019] In summary, compared with the prior art, the above-described technical solutions conceived by this invention mainly possess the following technical advantages:

[0020] (1) The parallel shaft module in this invention, in conjunction with the rotary connection device, enables the adjustment of the angle θ between the active and driven rotating devices, ultimately achieving rapid adaptation at any distance within a certain range; and by having one set of driven rotating devices simultaneously drive at least two sets of driven rotating devices, the synchronous transmission efficiency is improved. In particular, as the drive shaft for the propeller of a multi-bladed ship, it fully considers the characteristics of different propeller spacing, opposite rotation directions of the side propellers, and the limitations of the internal space of the ship body. Through the combined transmission in the parallel shaft module, in conjunction with the rotary connection device, multiple devices are precisely positioned, installed, and simultaneously driven.

[0021] (2) Preferably, the driven rotating device in the parallel shaft module is composed of multiple gears, thereby enabling flexible configuration of the structural arrangement and length design of the shaft system in space by the angle design between the driven rotating devices and the matching of the number of gears.

[0022] In summary, this invention proposes a shafting connection device for self-propulsion testing of a single-motor multi-propeller ship model. Addressing the issues of low shafting positioning accuracy, cumbersome installation, and excessive redundancy during the preparation and installation process for self-propulsion testing of a single-motor multi-propeller ship model, this invention achieves rapid and accurate matching for self-propulsion testing of multi-propellers with different spacings through a shafting parallel connection device. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of a multi-propeller ship shafting parallel device as an example of the present invention;

[0024] Figure 2 This is a cross-sectional view of a multi-propeller ship shafting parallel device as 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, as exemplified by the present invention.

[0026] Figure 4 This is a schematic diagram illustrating the usage arrangement of a single-motor multi-propeller self-propelled test device as an example of the present invention;

[0027] Figure 5 This is a cross-sectional schematic diagram of a multi-propeller ship model and a propeller model as an example of the present invention.

[0028] Figure 6 This is a cross-sectional schematic diagram of a multi-propeller power instrument for ships, as exemplified by the present invention.

[0029] In all the accompanying 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 power unit, 5-Servo motor, 6-Active rotating device, 7-Active rotating device shaft system, 8-Active rotating device gear, 9-First rotating connection 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 connection device. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this 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 parallel module completes the design of the transmission length of the shaft parallel module by adjusting the angle between the transmission devices. The device includes: an active rotating device 6, and combined driven rotating devices 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 by a rotating connection device.

[0033] In some implementations, such as 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 connection device includes a first rotating connection device 9 and a second rotating connection device 16. Specifically, the active rotating device 6 and the first driven rotating device 10 are connected and fixedly connected by the first rotating connecting device 9, and the active rotating device gear 8 meshes with the first driven rotating device gear 12 at the starting end of the first driven rotating device to ensure that the active rotating device gear 8 and the first driven rotating device gear 12 at the starting end always remain in a meshed state when rotating at different angles; the first driven rotating device 10 and the second driven rotating device 13 are connected and fixedly connected by the second rotating connecting device 16, and the first driven rotating device gear 12 at the end of the first driven rotating device meshes with the second driven rotating device gear 15 at one end of the second driven rotating device to ensure that the first driven rotating device gear 12 at the end and the second driven rotating device gear 15 at one end always remain in a meshed state when rotating at different angles. Thus, the rotation of the active rotating device gear drives the rotation of the driven rotating device gear, thereby completing the power transmission.

[0034] The parallel shaft module of the present invention is applied to a single-motor self-propelled boat 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 power 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, thereby transmitting power 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, thereby transmitting power along the first gear to the last gear of the first driven rotating device to the second driven rotating device 13. The second driven rotating device 13 is connected to the propeller power unit 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 a snap ring hinge type, which can rotate around the axis center at both ends of the connection device and achieve locking and fixation. This allows the transmission distance (l2 or l3) between the active rotary device 6 and the first driven rotary device 10, and the transmission distance (d) of the parallel shaft module, to be adjusted 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.

[0036] In some embodiments, the first rotary connecting device 9 is fixed to the main body of the active rotary device 6 and the main body of the first driven rotary device 10 by means of retaining rings, and the second rotary connecting device 16 is fixed to the main body of the first driven rotary device 10 and the main body of the second driven rotary device 13 by means of retaining rings, so as to complete the adjustment and locking of the rotation angle. During the rotation adjustment process, it is ensured that the gears of the active rotary device and the gears of the first driven rotary device are always tightly meshed, and the gears of the first driven rotary device and the gears of the second driven rotary device are efficiently transmitted.

[0037] In some embodiments, the second driven rotating device 13 includes a second driven rotating device shaft system 14 and a plurality of sequentially meshing gears disposed on the second driven rotating device shaft system 14, such that the second driven rotating device 13 is connected to the propeller power unit 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 rotary connection device and the total transmission length of the parallel shaft system module. 1) Adjust the connection angle between the active rotary device 6 and the first driven rotary device 10, and the angle θ between the first driven rotary device 10 and the second driven rotary device 13; 2) Select a suitable second driven rotary device (involving driven devices with different numbers of gears) to form an internally rotating or externally rotating shaft combination; 3) Fix the second driven rotary devices 13 on the left and right sides to the bottom plate of the ship model, and lock the first rotary connection device 9 and the second rotary connection device 16 in sequence; 4) Complete the parallel installation and fixing of the multi-propeller shaft system.

[0039] Let the width of the first driven rotating device 10 be L, the width of the driving rotating device 6 be l1, the distance from the driving rotating device 6 to the second driven rotating device 13 on the left be l2, the distance from the driving rotating device 6 to the second driven rotating device 13 on the right be l3, the transmission distance of the second driven rotating device 13 be l4, and the total transmission distance of the shaft parallel module be d.

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

[0041] l2=L·cosθ.

[0042] By selecting a suitable internal or external rotating driven second rotating device shaft system 14 combination on the second driven rotating device 13, the transmission distance (i.e., the horizontal width distance between the left and right propellers) d of the parallel shaft system module is:

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

[0044] Therefore, by adjusting the angle θ, it is possible to adapt d to any pitch of the propellers within a certain range.

[0045] It should be noted that when the shaft parallel module of the present invention is applied to a single-motor self-propelled ship model, the second driven rotating device is fixed at the bottom inside the ship model. With the help of the rotating connection device, the angle θ between the active rotating device and the driven rotating device can be adjusted, and finally, rapid adaptation at any distance within a certain range can be achieved.

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

[0047] The ship model body 1 is manufactured according to a certain scale λ ratio of the actual ship's shape. That is, the size of the ship model body 1 corresponds to the size of the actual ship's shape, and the shape design, appendages, etc. of the ship model body 1 are the same as those of the actual ship.

[0048] The propeller model 2, which is set 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 size of the propeller model 2 is proportional to that of the propeller of the actual ship, and the parameters such as the number of propellers, number of blades, disk ratio and pitch ratio of the propeller model 2 are the same as those of the propeller of the actual ship.

[0049] The ship model body 1 contains a propeller shaft system 3, a propeller power unit 4, a servo motor 5, and a shaft system parallel module provided in any embodiment of the present invention. The number (sets) of the propeller power unit 4 and the propeller shaft system 3 is the same as the number of propellers. The propeller power unit 4 passes through the hull of the ship model body 1 via the propeller shaft system 3 and is connected to the propeller model 2, used to measure the thrust and torque of the propeller rotation. The propeller shaft system, passing through the hull, connects the propeller outside the hull and the propeller power unit inside the hull, serving to transmit rotation. The servo motor 5 is a single motor, electrically controlled to achieve forward and reverse rotation and speed control, and is connected to the propeller power unit 4 shaft system via the shaft system parallel module, used to provide the propeller rotation power source during testing. Specifically, the shaft system parallel module has a corresponding suitable driven rotation device 2 shaft system 14 connected to each propeller power unit 4 to achieve the same rotation speed and rotation direction consistent with the actual ship. In the parallel shaft module, the active rotating device 6's active rotating device shaft system 7 is connected to the servo motor 5's shaft system, which is used to connect the multiple propeller shaft systems in parallel. The rotation speed of the servo motor 5 is synchronously transmitted to the corresponding propeller power unit 4 and propeller model 2 through the parallel shaft module, so as to realize that the rotation of a single motor drives the synchronous rotation of the multiple propeller system.

[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 power unit 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 power unit 3 is selectively connected to the shaft system 14 of the second driven rotating device to adjust the transmission distance of the second driven rotating device 13.

[0052] In some embodiments, the shaft parallel module adjusts its height on the bottom surface inside the model body 1 so that the propeller power unit 4 and the second driven rotating device shaft system 14 are on the same straight line.

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

Claims

1. A shaft system parallel module, characterized in that, include: Active rotating device (6), two sets of combined driven rotating devices, and the two sets of combined driven rotating devices are respectively arranged on both sides of the active rotating device (6); The active rotating device (6) includes an active rotating device shaft system (7) and a single active rotating device gear (8); each group of the combined driven rotating devices includes a first driven rotating device (10) and a second driven rotating device (13). The first driven rotating device (10) and the second driven rotating device (13) both include a driven rotating device shaft system and a plurality of sequentially meshing gears arranged on the driven rotating device shaft system. 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 and fixed by a rotating connection device to ensure that when rotating at different angles, the active rotating device gear of the active rotating device (6) and the first driven rotating device gear at the beginning end of the first driven rotating device (10), the first driven rotating device gear at the end of the first driven rotating device (10), and the gear of the second driven rotating device at one end always maintain a meshing state. The rotary connection device is a snap ring hinge type, which allows the rotary connection device to rotate around the center of the shaft system connected to its two ends, and then be fixed to the shaft system at both ends by locking, so as to adjust the transmission distance of the parallel shaft module.

2. The shaft parallel module according to claim 1, characterized in that, The rotary connection device includes 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 by the first rotating connecting device (9), and the gear (8) of the active rotating device meshes with the 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 by the second rotating connecting device (16), and the gear at the other end of the first driven rotating device (10) meshes with the gear at one end of the second driven rotating device (13).

3. The shaft parallel module according to claim 2, characterized in that, Both the first driven rotating device (10) and the second driven rotating device (13) adjust their length by configuring the number of gears.

4. The shaft parallel module according to claim 2, characterized in that, The second driven rotating device (13) includes a second driven rotating device shaft system (14) and a plurality of sequentially meshing gears disposed on the second driven rotating device shaft system (14), wherein the second driven rotating device shaft system (14) is used to adjust the length by connecting with other devices through different positions thereon.

5. A self-propelled test device for a single-motor multi-propeller boat model, characterized in that, include: Ship model body (1); Propeller model (2) is set outside the ship model body (1); The propeller shaft system (3), propeller power unit (4), servo motor (5), and shaft system parallel module as described in any one of claims 1-4 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 power unit (4), and the other end is connected to the propeller model (2); the servo motor (5) is electrically controlled to realize forward and reverse rotation and speed control, and is connected to the propeller power unit (4) through the shaft system parallel module.

6. The self-propelled test device for a single-motor multi-propeller ship model according to claim 5, characterized in that, The servo motor (5) is connected to the propeller power unit (4) through the shaft system parallel module. Specifically, the servo motor (5) is connected to the active rotating device (6) through the active rotating device shaft system (7) in the shaft system parallel module, and the propeller power unit (4) is connected to the second driven rotating device (13) through the second driven rotating device shaft system (14) in the shaft system parallel module.

7. The self-propelled test device for a single-motor multi-propeller ship model according to claim 6, characterized in that, The propeller power unit (4) is connected to different positions on the shaft system (14) of the second driven rotating device to adjust the transmission distance of the second driven rotating device (13).

8. The self-propelled test device for a single-motor multi-propeller ship model according to claim 5, characterized in that, The parallel shaft module adjusts its height on the bottom surface inside the ship model body (1) so that the propeller power unit (4) and the second driven rotating device shaft system (14) are on the same straight line.

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