CN210981725U - Device for testing drag resistance at fixed depth - Google Patents
Device for testing drag resistance at fixed depth Download PDFInfo
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- CN210981725U CN210981725U CN201921495498.8U CN201921495498U CN210981725U CN 210981725 U CN210981725 U CN 210981725U CN 201921495498 U CN201921495498 U CN 201921495498U CN 210981725 U CN210981725 U CN 210981725U
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Abstract
The utility model discloses a device for depth setting test drag resistance, which mainly comprises a test instrument, a first fixed pulley, a second fixed pulley, a drag line array, a rigid depth setting rod, a drag rope and a fixed structure, wherein one end of the rigid depth setting rod is hinged with the fixed structure so as to rotate a certain angle around the fixed structure; the tow rope restores horizontal installation after inclining downwards through the first fixed pulley and the second fixed pulley which are arranged at the two ends of the rigid depthkeeping rod, the wet end of the tow rope is connected with the tow linear array, and the other end of the tow rope penetrates through the second fixed pulley, the first fixed pulley and the testing instrument to be connected with the bearing supporting structure. The utility model can realize horizontal dragging and flow resistance testing of equipment with different structures and shapes under different depths, different dragging speeds and flow velocities; the device is simple to lay and accurate to measure; the test is easy to be carried out in lake and sea environment; the system can effectively support and verify the design of towing depth, towing attitude, structural strength, vibration reduction and isolation parameters and the like of equipment such as the towed linear array sonar.
Description
Technical Field
The utility model relates to a hydrodynamics of flow resistance test among the underwater equipment dragging process measures the field, concretely relates to a device for drag resistance is dragged in depthkeeping test.
Background
The towing line array is an important means for underwater target detection, ocean noise measurement and submarine resource survey, and can achieve the arrangement of water layers at different depths through the length adjustment and the towing speed adjustment of a tail microgravity towing cable of a ship or the control of different submergence depths of a submarine, thereby realizing the measurement of noise signals and the warning, tracking and positioning of underwater acoustic targets. With the vigorous development of China in the ocean field and the rapid upgrade of naval equipment, the application range of the underwater towed line array is wider and wider.
The towing line array is generally a neutral density array, is calibrated for towing resistance tests at different towing speeds, and can provide guidance for controlling towing depth, designing structural strength, even array noise suppression and attitude optimization. At present, the determination of the dragging resistance of the dragging linear array mainly adopts a theoretical estimation and laboratory test method, and the operations of structural strength design, dragging resistance adjustment, dragging depth control and the like of the array are developed according to the estimation and test results.
The prior art mainly has the following technical problems:
at present, the towing resistance of towing sonar equipment is mostly obtained by theoretical or empirical formula calculation, and the parameter selection and the difference of the structure shape of a towed body cause that great errors exist in the towing resistance calculation, so that great deviations of the design such as the cable laying length for towing depth control, vibration reduction and isolation parameters of vibration reduction and isolation modules of a towing line array and the like are caused;
although the towing resistance can be accurately measured by testing the towing tension of the towing linear array in a laboratory, the change of the towing resistance in the whole towing process cannot be accurately reflected, and the test towing linear array scale is greatly limited;
by adopting the towing tension test equipment mounted at the stern of the towing boat, although the towing linear array, the towing body and the like can be towed and tested in an actual working environment, the towing process has a certain inclination angle due to the fact that the acting point of the towing tension test equipment is higher than the water surface, and the towing tension test has a certain deviation, so that the towing speed is easy to be unstable; and at high towing speed, the tested towed linear array or towed body can jump out of the water surface, so that the test is failed (see figure 4), and the towing speed of the test is greatly limited.
In summary, the current measurement and calculation method cannot accurately test the drag resistance of the drag line array and the drag body in the actual water area environment, so that guidance cannot be provided for the design of the drag depth and the vibration reduction and isolation module.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art existence, and provide a device that is used for depthkeeping test to drag resistance.
The purpose of the utility model is accomplished through following technical scheme: a device for testing dragging resistance at a fixed depth mainly comprises a testing instrument, a first fixed pulley, a second fixed pulley, a dragging line array, a rigid fixed depth rod, a dragging rope and a fixed structure, wherein one end of the rigid fixed depth rod is hinged with the fixed structure so as to rotate for a certain angle around the fixed structure, the other end of the rigid fixed depth rod is connected with a pulley seat of the second fixed pulley, and the pulley seat of the first fixed pulley is fixedly connected to the fixed structure; the rigid depth-fixing rod is downwards arranged below the water surface at a certain angle, the towing rope is downwards inclined through the first fixed pulley and the second fixed pulley which are arranged at the two ends of the rigid depth-fixing rod and then is horizontally installed, the wet end of the towing rope is connected with the towing line array, and the other end of the towing rope penetrates through the second fixed pulley, the first fixed pulley and the testing instrument and is connected with the bearing supporting structure.
Furthermore, the test instrument is a standard tension meter, the bearing support structure is a roller of a winch, the winch is installed on a test ship to form a test ship installation scheme, and the winch is connected with the towing rope and retracts the towing rope at a certain speed in the test ship installation scheme.
Furthermore, the test instrument is a standard tension meter, and the bearing support structure is fixed on the towing boat to form a towing boat installation scheme.
Furthermore, the hauling rope adopts a neutral buoyancy and weak positive buoyancy hauling rope.
Furthermore, a second dragging rope limit and a first dragging rope limit are respectively arranged at the two ends of the rigid depth fixing rod, which are close to the second fixed pulley and the first fixed pulley.
Furthermore, the middle part of the rigid depth fixing rod is connected with a protection rope, and the protection rope is connected with the ship body.
The utility model has the advantages that: the utility model can be applied to the measurement of the dragging resistance of equipment such as underwater dragging line arrays, dragging bodies and the like under different dragging speeds, and can also be applied to the rapid and reliable measurement of the scouring force of water flow under the installation water surface under different flow speeds; the horizontal dragging and flow resistance test of equipment with different structures and shapes can be realized at different depths and different dragging speeds and flow velocities; the device is simple to arrange and accurate in measurement, and the measurement result can provide a basis for the structure, shape and strength design of the underwater towing equipment; the test is easy to be carried out in lake and sea environment and is not limited by parameters such as array section scale, array section diameter and the like; the system can effectively support and verify the design of towing depth, towing attitude, structural strength, vibration reduction and isolation parameters and the like of equipment such as the towed linear array sonar.
Drawings
Fig. 1 is a schematic view of the installation work of the test ship of the present invention.
Fig. 2 is the utility model discloses a drag boat installation work schematic diagram.
Fig. 3 is a front view of the structure of the present invention.
Fig. 4 is a diagram illustrating the underwater drag resistance test values before five towed bodies jump out of the water (the drag force point is higher than the water surface).
Fig. 5 is a top view of the present invention.
Description of reference numerals: the device comprises a testing device 1, a towing line array 2, a winch 3, a test ship 4, a towing boat 5, a rigid depth-fixing rod 6, a first fixed pulley 7, a first towing rope limit 8, a towing rope 9, a protection rope 10, a second fixed pulley 11, a second towing rope limit 12, a bearing supporting structure 13, a standard tension meter 14, a standard tension meter 15 and a fixing structure 16.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and embodiments:
as shown in the attached drawings, the device for testing the dragging resistance at the fixed depth mainly comprises a testing instrument, a first fixed pulley 7, a second fixed pulley 11, a dragging line array 2, a rigid fixed depth rod 6, a dragging rope 9 and a fixed structure 16, wherein one end of the rigid fixed depth rod 6 is hinged with the fixed structure 16 so as to rotate for a certain angle around the fixed structure 16, the other end of the rigid fixed depth rod 6 is connected with a pulley seat of the second fixed pulley 11, and the pulley seat of the first fixed pulley 7 is fixedly connected on the fixed structure 16; the rigid depth rod 6 is downwards arranged below the water surface at a certain angle, the towing rope 9 is downwards inclined through a first fixed pulley 7 and a second fixed pulley 11 which are arranged at two ends of the rigid depth rod 6 and then is horizontally installed, the wet end of the towing rope 9 is connected with the towing linear array 2, and the other end of the towing rope 9 penetrates through the second fixed pulley 11, the first fixed pulley 7 and the testing instrument to be connected with the force bearing supporting structure 13. The utility model discloses a structure of fixed pulley group, drag the battle array section under water and have had no loss and get to shift to the air circumstance in measure, solved the problem that tensile test device can not soak to the supporting realization of accessible recording equipment is to dragging the real-time recording of overall process. The towing rope 9 is a neutral buoyancy and weak positive buoyancy towing rope to reduce the influence on the array section towing. The two ends of the rigid depth-fixing rod 6 are close to the second fixed pulley 11 and the first fixed pulley 7, and a second tow rope limit 12 and a first tow rope limit 8 are respectively arranged on the two ends of the rigid depth-fixing rod, the middle of the rigid depth-fixing rod 6 is connected with a protection rope 10, and the protection rope 10 is connected with the test ship 4 and the hull of the towing boat 5. The towing axis of the towing linear array 2 can be adjusted to a certain underwater depth by adjusting the rigid depth fixing rod 6, so that the whole process of the array section to be towed is below the water surface, and the problem that the array section floats on the water surface and drags the bottom due to the fact that the specific gravity of the equipment to be towed and the deviation of water are large is avoided. With the increase of the towing speed, the towing line array 2 leans against the axis towed to the fixed depth, and the condition that the array section or the towed body jumps out of the water surface cannot exist.
Example 1: as shown in fig. 1, the testing instrument is a standard tension meter 15, the bearing support structure 13 is a roller of a winch 3, and the winch 3 is installed on the test ship 4. In the installation scheme of the test ship 4, the winch 3 is connected with the towing rope 9 and the towing rope 9 is shortened at a certain speed. The speed of the winch 3 for shortening the towing rope 9 is the towing speed, the towing rope 9 on the test ship 4 adopts the standard tension meter 15 to monitor the towing tension in the whole process, the towing resistance of the towing line array 2 at different towing speeds can be obtained by deducting the flow resistance of the towing rope 9 in water, the installation range of the standard tension meter 15 is selected, and the precision is within 5% of the range.
Example 2: as shown in fig. 2: the testing instrument is a standard tension meter 14, and a bearing supporting structure 13 is fixed on the towing boat 5. In the installation scheme of the towed boat 5, a standard tension meter 14 is installed at the fixed positions of the towing rope 9 and the towed boat 5, the unpowered towed boat 5 is towed by a power system, the whole process of recording of the towing force data can be realized, and the towing resistance of the towed linear array 2 can be obtained by subtracting the flow resistance of the towing rope 9 with the length at different towing speeds because the underwater towing rope 9 is of a fixed length.
The utility model discloses the working process:
1. and (3) arranging and laying the towed linear array 2 at a fixed depth: the method comprises the following steps of installing a testing device 1 on a test ship 4 or a towing boat 5 through a fixing structure 16, arranging a sleeved rigid fixed-depth rod 6 to a certain depth below the water surface according to the requirements of the scale and density of a towing line array 2, enabling a towing rope 9 to be threaded on the testing device 1, connecting the dry end of the towing rope 9 with a roller of a winch 3 or with a bearing support structure 13, additionally installing a standard tension meter 15 on the towing rope 9 in the former, additionally installing a standard tension meter 14 between the towing rope 9 and the bearing support structure 13 in the latter, connecting the wet end of the towing rope 9 with the testing towing line array 2, connecting a protection rope 10 with a ship body, realizing towing minimum depth limitation, and towing the testing line array to a certain offshore distance;
2. and (3) measuring the drag resistance: starting a winch 3 in an attached drawing 1 or a towing boat 5 in an attached drawing 2, swinging the rigid depth-fixing rod 6 by an angle in a towing reverse direction, ensuring that the tail end of the rigid depth-fixing rod 6 is not underwater by a certain depth through reverse tension of a protection rope 10, driving a towing line array 2 with neutral buoyancy to horizontally tow and advance underwater, transmitting flow resistance of a towing rope 9 and the flow resistance of the towing line array 2 through the towing rope 9, transmitting the flow resistance to a dry end of the towing rope 9 through a second fixed pulley 11 and a first fixed pulley 7, testing and recording tension of the towing rope 9 through a standard tension meter 14 or a standard tension meter 15, and acquiring towing flow resistance.
The utility model discloses not only can obtain the regularity data of dragging the flow resistance through the experiment, calculate for the theory and provide accurate parameter, provide the basis for dragging system's tow-cable specification and subtracting vibration isolation section parameter design simultaneously, can survey the overall process that battle array section dragged in real time in addition, drag and the variable speed for stabilizing and drag etc. operation battle array section state and gesture provide experimental guidance down.
It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.
Claims (6)
1. A device for depth measurement drag resistance is characterized in that: the device mainly comprises a testing instrument, a first fixed pulley (7), a second fixed pulley (11), a towing line array (2), a rigid depth-setting rod (6), a towing rope (9) and a fixing structure (16), wherein one end of the rigid depth-setting rod (6) is hinged with the fixing structure (16) so as to rotate for a certain angle around the fixing structure (16), the other end of the rigid depth-setting rod (6) is connected with a pulley seat of the second fixed pulley (11), and the pulley seat of the first fixed pulley (7) is fixedly connected to the fixing structure (16); rigidity depthkeeping pole (6) be certain angle and adorn below the surface of water downwards, resume horizontal installation after dragging rope (9) through setting up first fixed pulley (7), second fixed pulley (11) downward sloping at rigidity depthkeeping pole (6) both ends, drag rope (9) wet end and connect and drag linear array (2), the other end that drags rope (9) passes second fixed pulley (11), first fixed pulley (7), test instrument is connected with load bearing structure (13).
2. The device for depthkeeping testing drag resistance of claim 1, wherein: the testing instrument is a standard tension meter (15), the bearing supporting structure (13) is a roller of the winch (3), and the winch (3) is installed on the test ship (4).
3. The device for depthkeeping testing drag resistance of claim 1, wherein: the testing instrument is a standard tension meter (14), and the bearing supporting structure (13) is fixed on the towing boat (5).
4. The device for depthkeeping testing drag resistance of claim 1, wherein: the towing rope (9) adopts a neutral buoyancy towing rope and a weak positive buoyancy towing rope.
5. The device for depthkeeping testing drag resistance of claim 1, wherein: and a second dragging rope limit (12) and a first dragging rope limit (8) are respectively arranged at the positions, close to the second fixed pulley (11) and the first fixed pulley (7), of the two ends of the rigid depth fixing rod (6).
6. The device for depthkeeping testing drag resistance of claim 1, wherein: the middle part of the rigid depth fixing rod (6) is connected with a protection rope (10), and the protection rope (10) is connected with the ship body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921495498.8U CN210981725U (en) | 2019-09-10 | 2019-09-10 | Device for testing drag resistance at fixed depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921495498.8U CN210981725U (en) | 2019-09-10 | 2019-09-10 | Device for testing drag resistance at fixed depth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210981725U true CN210981725U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921495498.8U Active CN210981725U (en) | 2019-09-10 | 2019-09-10 | Device for testing drag resistance at fixed depth |
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| Country | Link |
|---|---|
| CN (1) | CN210981725U (en) |
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2019
- 2019-09-10 CN CN201921495498.8U patent/CN210981725U/en active Active
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