Device for measuring the mooring thrust of an underwater propeller

Abstract

The utility model relates to underwater equipment measurement technical field especially relates to a kind of device for measuring the mooring thrust of underwater propeller, including test pool and device main body, the device main body includes cover, hoisting frame, sensor and propeller;The cover is covered in test pool top;One end of hoisting frame is connected with cover, and the other end of hoisting frame is connected with sensor and extends into the test pool;Sensor is connected between the propeller and hoisting frame, and sensor can directly measure the horizontal direction thrust of propeller.Adapter support is connected between sensor and propeller, so that the thrust of propeller is directly transmitted to sensor.The utility model is simple in structure, can be directly measured, thrust value and sensor reading correspond, save intermediate conversion link, improve measurement efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of underwater equipment measurement technology, and in particular to a device for measuring the mooring thrust of an underwater propulsion unit. Background Technology

[0002] In the research, development, production, and testing of underwater thrusters, accurate measurement of their mooring thrust is necessary to evaluate their performance. Existing measurement devices have some shortcomings, such as complex structures, difficult installation and debugging, insufficient measurement accuracy, and susceptibility to interference from external environmental factors. Therefore, there is an urgent need for a device with a simple structure and high measurement accuracy for measuring the mooring thrust of underwater thrusters.

[0003] Traditional thruster mooring thrust testing systems typically use push-pull force sensors with S-beam or single-column beam structures. To accurately measure push-pull force values, these sensors require a relatively complex structure to ensure that the thrust of the tested thruster acts proportionally (lever effect) in the sensor's measurement direction. While traditional thrust testing lever structures employ bearings to reduce friction loss, some wear and tear still occurs. Utility Model Content

[0004] In order to effectively solve the technical problems in the background art, the main purpose of this utility model is to provide a device for measuring the mooring thrust of underwater propellers, so as to solve the problems of complex structure and low measurement accuracy in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A device for measuring the mooring thrust of an underwater thruster includes a test pool and a main body of the device, wherein the main body of the device includes a cover, a lifting frame, a sensor and a thruster;

[0007] The cover covers the top of the test pool;

[0008] One end of the hoisting frame is connected to the cover, and the other end of the hoisting frame is connected to the sensor and extends into the test water tank;

[0009] The sensor is connected between the thruster and the hoisting frame, and the sensor can directly measure the horizontal thrust of the thruster.

[0010] As a preferred technical solution, the hoisting frame includes a connecting column and a connecting member; one end of the connecting column is connected to the cover body, and the other end is connected to the connecting member.

[0011] As a preferred technical solution, the sensor includes a first connection hole for connecting the connector and / or a second connection hole for connecting the thruster;

[0012] The axis of the first connecting hole and / or the second connecting hole is parallel to the axis of the connecting post;

[0013] The axis of the first connecting hole and / or the second connecting hole is perpendicular to the axis of the thruster.

[0014] As a preferred technical solution, it also includes a detachable adapter bracket that connects the sensor and the thruster, the adapter bracket including an upper bracket and a lower bracket.

[0015] As a preferred technical solution, the upper support is a hollow column structure, and / or the lower support is an inverted U-shaped structure, and / or the thruster motor is housed within the lower support.

[0016] As a preferred technical solution, the connecting column of the hoisting frame is a hollow cylinder; and / or, the hoisting frame further includes a reinforcing part, which is a reinforcing rib plate evenly distributed around the circumference of the connecting column, and the reinforcing rib plate is fixed between the bottom of the cover and the outer wall of the connecting column.

[0017] As a preferred technical solution, the cover is provided with an observation window and / or a hoisting part.

[0018] As a preferred technical solution, the lifting part of the cover includes a groove-shaped connecting beam and a perforated lifting plate disposed inside it.

[0019] As a preferred technical solution, the sensor is any one of a cantilever beam sensor, a three-dimensional force sensor, or a six-dimensional force sensor.

[0020] As a preferred technical solution, the length of the test pool is not less than 10 times the diameter of the thruster, and the width is not less than 5 times the diameter of the thruster.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Direct measurement without lever coefficient: Traditional lever-type devices require calculating the thrust through the lever arm ratio, which introduces friction loss and lever coefficient error; while this case utilizes the characteristics of the cantilever beam pressure sensor, the thrust value corresponds to the sensor reading and can be read directly, eliminating the intermediate conversion link and improving measurement efficiency and accuracy.

[0023] 2. Simplified structure and reduced cost: Complex transmission mechanisms such as levers and bearings are eliminated, reducing mechanical losses and assembly difficulty; hollow lifting frames and inverted U-shaped adapter brackets are used to optimize weight and reduce the load on the cover, while the compact layout shortens the lever arm and enhances structural rigidity.

[0024] 3. High precision and reliability: The cantilever beam pressure sensor is sensitive to vertical force, has strong resistance to lateral interference, and its error is significantly lower than that of the traditional lever-type device.

[0025] 4. Scene adaptability: The test pool size is dynamically designed according to the thruster power, and the observation window and hoisting unit improve the convenience of operation, meeting the mooring test requirements of thrusters of different sizes. Attached Figure Description

[0026] Figure 1 This is a diagram showing the usage state of the device of this utility model;

[0027] Figure 2 This is a front view of the device of this utility model;

[0028] Figure 3 This is a perspective view of the device of this utility model;

[0029] Figure 4 This is a perspective view of the connector of this utility model;

[0030] Figure 5 This is a perspective view of the sensor of this utility model.

[0031] In the diagram: 1. Test pool; 2. Cover; 21. Observation window; 22. Lifting unit; 3. Lifting frame; 31. Connecting column; 32. Connecting piece; 33. Reinforcing part; 4. Sensor; 41. First connecting hole; 42. Second connecting hole; 5. Adapter bracket; 51. Upper bracket; 52. Lower bracket; 6. Pusher. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] like Figures 1-5 As shown, a device for measuring the mooring thrust of an underwater propulsion unit includes a test pool 1 and a main body of the device. The main body of the device includes a cover 2, a hoisting frame 3, a sensor 4, a transfer bracket 5, and a propulsion unit 6.

[0034] In this embodiment, the size of the test pool 1 is designed according to the power level of the thruster 6 under test. Generally, the length is not less than 10 times the diameter of the thruster 6, preferably 10, 11, or 12 times, and the width is not less than 5 times the diameter, preferably 5, 6, or 7 times, in order to meet the test requirements for flow field stability.

[0035] The cover 2 is shaped to fit the test pool 1, and its size is designed to perfectly cover the top of the pool. Four observation windows 21 are evenly distributed on the cover 2 to observe the experimental conditions inside the pool. A lifting section 22 is located at the center of the top of the cover 2 for lifting and lowering the cover 2. In some preferred embodiments, the lifting section 22 includes a grooved connecting beam and a perforated lifting plate inside it. In actual operation, the hook of a crane can be inserted into the hole in the lifting plate to lift and lower the cover 2.

[0036] One end of the lifting frame 3 is connected to the cover 2, and the other end is connected to the sensor 4 and extends into the test water tank 1. In some specific embodiments, the lifting frame 3 includes a connecting column 31, a connecting piece 32, and a reinforcing part 33. The top of the connecting column 31 passes through the center of the cover 2 and extends to the top of the cover 2. The two are welded and fixed together with the connecting beam. In order to reduce the overall weight of the lifting frame 3, in some preferred embodiments, the connecting column 31 can be set as a hollow cylinder to reduce the load on the cover 2. The bottom of the connecting column 31 is fixed with the connecting piece 32. Specifically, the connecting piece 32 is a square plate with threaded holes for connecting the sensor 4.

[0037] In some specific embodiments, the sensor 4 includes a first connection hole 41, through which the sensor 4 is connected to the connector 32; the axis of the first connection hole 41 is parallel to the axis of the connecting post 31, and the axes of both are perpendicular to the axis of the thruster 6.

[0038] Furthermore, the sensor 4 also includes a second connection hole 42, the axis of which is parallel to the axis of the first connection hole 41, and the axis of the pusher 6 is perpendicular to the axis of the second connection hole 42.

[0039] The above technical solutions ensure the perpendicularity of the thruster 6 axis to the sensor 4, thereby ensuring that the sensor 4 can directly measure the horizontal force on the thruster 6 from the side.

[0040] In some specific embodiments, in order to strengthen the connection between the cover 2 and the connecting post 31, a plurality of reinforcing parts 33 are uniformly arranged circumferentially between the two; the reinforcing part 33 is specifically a reinforcing rib, and the two mutually perpendicular sides of the reinforcing rib are welded and fixed to the bottom of the cover 2 and the side wall of the connecting post 31.

[0041] The sensor 4 is located at the bottom of the hoisting frame 3. The thruster 6 under test is connected to the adapter bracket 5 and then fixed to the sensor 4. The sensor 4 is perpendicular to the thrust direction of the thruster 6. The reading of the sensor 4 will directly show the mooring thrust of the thruster 6. It does not require an additional lever coefficient to calculate the mooring thrust, as is the case with traditional mooring thrust testing devices.

[0042] In some specific embodiments, the sensor 4 is any one of a cantilever beam sensor, a three-dimensional force sensor, or a six-dimensional force sensor; preferably, the sensor 4 is an IP68 cantilever beam type. This is because the thrust measured at all positions in the direction of the force of the cantilever beam sensor is consistent, and there is no need for a lever structure. As long as the thrust is applied vertically in the direction of the cantilever beam extension, it can be directly fed back to the sensor 4 (without calculating the lever coefficient). This simplifies the mechanical structure, reduces system friction and other losses, and avoids measurement errors caused in the process of calculating the lever coefficient.

[0043] In some specific embodiments, the sensor 4 and the pusher 6 are also detachably connected by an adapter bracket 5; specifically, the second connection hole 42 of the sensor 4 is connected to the adapter bracket 5 via a flange. Alternatively, in test scenarios where the sensor 4 needs to be frequently replaced, a quick-locking pin or a snap-fit ​​connection can be used to connect it to the adapter bracket 5 to reduce disassembly and assembly time.

[0044] In some specific embodiments, the adapter bracket 5 includes an upper bracket 51 and a lower bracket 52 fixed as one piece; the top of the upper bracket 51 is connected to the lower end of the sensor 4; the left and right sides of the lower bracket 52 are respectively threaded to the left and right wing plates of the thruster 6 motor. Preferably, the upper bracket 51 is a hollow column structure and the lower bracket 52 is an inverted U-shaped structure, thereby minimizing the overall weight of the device while ensuring the connection function; more preferably, a portion of the thruster 6 motor is located inside the lower bracket 52, reducing the overall height of the device and allowing the sensor 4 to be installed as close as possible to the thruster 6. This reduces the lever arm acting on the connection point of the sensor 4, increases structural safety, and reduces structural deflection.

[0045] This invention can directly read the mooring thrust value without measuring the lever coefficient to calculate the thrust.

[0046] Although existing lever-type mooring thrust testing structures use bearings to reduce friction loss, there is still some mechanical structural loss. However, our measurement structure has virtually no mechanical structural loss, and the data obtained is more accurate due to the use of cantilever beam sensor 4.

[0047] Working process: The thruster 6 under test is connected to the lower end of the sensor 4 through the adapter bracket 5, and the upper end of the sensor 4 is fixed on the hoisting frame 3, and the whole is suspended in the test water tank 1; the axial thrust generated by the thruster 6 is directly transmitted vertically to the sensor 4, and the sensor 4 outputs an electrical signal to the external display device to directly display the thrust value.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the mooring thrust of an underwater propulsion vehicle, comprising a test pool (1) and a main body of the device, characterized in that: The main body of the device includes a cover (2), a lifting frame (3), a sensor (4), and a thruster (6); The cover (2) covers the top of the test pool (1); One end of the hoisting frame (3) is connected to the cover (2), and the other end of the hoisting frame (3) is connected to the sensor (4) and extends into the test water tank (1); The sensor (4) is connected between the thruster (6) and the hoisting frame (3), and the sensor (4) can directly measure the horizontal thrust of the thruster (6).

2. The device for measuring the mooring thrust of an underwater propeller according to claim 1, characterized in that, The hoisting frame (3) includes a connecting column (31) and a connector (32); one end of the connecting column (31) is connected to the cover (2), and the other end is connected to the connector (32).

3. The device for measuring the mooring thrust of an underwater propeller according to claim 2, characterized in that, The sensor (4) includes a first connection hole (41) for connecting the connector (32) and / or a second connection hole (42) for connecting the thruster (6); The axes of the first connecting hole (41) and / or the second connecting hole (42) are parallel to the axis of the connecting post (31); The axes of the first connecting hole (41) and / or the second connecting hole (42) are perpendicular to the axis of the thruster (6).

4. The apparatus for measuring the mooring thrust of an underwater propeller according to any one of claims 1 to 3, characterized in that, It also includes a detachable adapter bracket (5) that connects the sensor (4) and the thruster (6), the adapter bracket (5) comprising an upper bracket (51) and a lower bracket (52) fixed together.

5. The apparatus for measuring the mooring thrust of an underwater propeller according to claim 4, characterized in that, The upper support (51) is a hollow column structure, and / or the lower support (52) is an inverted U-shaped structure, and / or the propeller (6) motor is housed within the lower support (52).

6. The apparatus for measuring the mooring thrust of an underwater propeller according to claim 1 or 5, characterized in that, The connecting column (31) of the hoisting frame (3) is a hollow cylinder; and / or, the hoisting frame (3) further includes a reinforcing part (33), which is a reinforcing rib plate evenly distributed around the connecting column (31), and the reinforcing rib plate is fixed between the bottom of the cover (2) and the outer wall of the connecting column (31).

7. The apparatus for measuring the mooring thrust of an underwater propeller according to claim 1, characterized in that, The cover (2) is provided with an observation window (21) and / or a hoisting part (22).

8. The apparatus for measuring the mooring thrust of an underwater propeller according to claim 7, characterized in that, The lifting part (22) of the cover (2) includes a groove-shaped connecting beam and a perforated lifting plate disposed therein.

9. The apparatus for measuring the mooring thrust of an underwater propeller according to claim 1, characterized in that, The sensor (4) is any one of a cantilever beam sensor, a three-dimensional force sensor, or a six-dimensional force sensor.

10. The apparatus for measuring the mooring thrust of an underwater propeller according to claim 1, characterized in that, The length of the test pool (1) is not less than 10 times the diameter of the thruster (6), and the width is not less than 5 times the diameter of the thruster (6).

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