CN106872156B - Test device capable of realizing variable water depth under mooring state of multiple water-jet propellers - Google Patents
Test device capable of realizing variable water depth under mooring state of multiple water-jet propellers Download PDFInfo
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- CN106872156B CN106872156B CN201710092815.0A CN201710092815A CN106872156B CN 106872156 B CN106872156 B CN 106872156B CN 201710092815 A CN201710092815 A CN 201710092815A CN 106872156 B CN106872156 B CN 106872156B
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention relates to a test device capable of realizing variable water depth under the mooring state of various water-jet thrusters, which comprises a buoyancy tank (3), a lifting platform (5), a thrust sensor (6) and an electric drive mechanism, wherein the buoyancy tank is connected with the lifting platform; the bottom surface of the buoyancy tank (3) is connected with the upper end of the buoyancy tank support frame (4), and the lower end of the buoyancy tank is fixed on the bottom of the test water tank; the lifting platform (5) is fixed by a lifting platform connecting frame (7) at the left side and the right side of the test pool and a fixed rod on the bank of the lifting platform; one end of the thrust sensor (6) is connected with the electric driving mechanism, and the other end of the thrust sensor is connected with the side wall of the test pool. The invention realizes that one set of test device completes the performance tests of different types of water jet propellers and under the working condition of variable water depth, and can obviously reduce the time and cost required by the tests.
Description
Technical Field
The invention relates to the field of ship propulsion, in particular to a performance test of a mooring water-jet propeller under the condition of water depth change.
Background
In the sailing process of the water jet propulsion ship, the propulsion performance of the installed water jet propulsion ship can generate obvious difference along with the change of the water depth of a sailing water area. At present, the test of the propulsion performance of the water jet propeller is mainly carried out on conventional test beds such as an open water pump test bed, but the conventional test beds are difficult to test the performance of the water jet propeller in shallow water areas, and the actual operation working condition of the water jet propeller cannot be comprehensively and accurately simulated. Therefore, in order to simulate various complex working conditions of the full-rotation water jet propulsion device of a water jet propulsion ship during navigation in a deep water area, water entry or shore landing of the ship, and thereby predict the propulsion performance of the water jet propulsion device more accurately, it is necessary to design a propulsion performance test device capable of realizing that the water jet propulsion device changes with the water depth in a mooring state.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to measure the thrust generated by the water jet propeller, how to realize the change of the water depth tested by the water jet propeller, and how to realize the performance tests of various types of water jet propellers.
The invention adopts the following technical scheme for solving the technical problems:
the invention provides a test device capable of realizing variable water depth under the mooring state of various water-jet thrusters, which comprises a buoyancy tank, a lifting platform, a thrust sensor and an electric drive mechanism, wherein the buoyancy tank is arranged on the lifting platform; the bottom surface of the buoyancy tank is connected with the upper end of the buoyancy tank support frame, and the lower end of the buoyancy tank is fixed on the bottom of the test water tank; the lifting platform is fixed by the lifting platform connecting frames on the left side and the right side of the test pool and a fixed rod on the lifting platform shore; one end of the thrust sensor is connected with the electric driving mechanism, and the other end of the thrust sensor is connected with the side wall of the test water pool.
The bottom of the buoyancy tank is provided with an open tail plate, and a buoyancy tank bottom plate mounting mother plate and a buoyancy tank tail plate mounting mother plate are arranged at the opening; the mother board is a rectangular board with four rounded corners, the size is fixed, and the position of an inner hole and the size of an opening of the mother board are matched with the propeller to be tested.
The propeller to be tested comprises a centrifugal water jet propeller to be tested and an axial flow water jet propeller to be tested; when a centrifugal water jet propeller test is carried out, a centrifugal water jet propeller to be tested is installed on a bottom plate installation mother plate of a buoyancy tank, and an opening is not needed for the installation mother plate of a tail plate of the buoyancy tank; when the axial-flow type water-jet propeller test is carried out, the water inlet flow channel of the axial-flow type water-jet propeller to be tested is installed on the bottom plate installation mother plate of the buoyancy tank, and the water suction pump body is installed on the enclosing plate of the tail plate installation mother plate of the buoyancy tank.
The buoyancy tank support frames are two, and the upper ends of the buoyancy tank support frames are connected with the bottom surface of the buoyancy tank through four linear bearings.
The height of the fixed rod on the lifting platform is adjusted through the jack, so that the water depth change in the test water pool is realized, and the specific adjusting method is as follows: the height of the onshore fixed rod of the lifting platform can be adjusted through four jacks, and the onshore fixed rod of the lifting platform comprises an inner rod and an outer rod; after the jack adjusts the height of the fixed rod on the lifting platform shore, the inner rod and the outer rod are fixed through the pin.
The upper end of the inner rod is connected with the lifting platform connecting frame, the lower end of the inner rod is connected with the upper end of the outer rod, and the lower end of the outer rod is fixed on the ground.
The thrust sensor is arranged on the outer side of the buoyancy tank and connected to the pool wall of the buoyancy tank, and is used for realizing thrust measurement.
The thrust sensor adopts a thread type thrust sensor.
Electric drive mechanism, including transmission shaft, reduction gear box, torquemeter and driving motor, wherein: the driving motor is connected with the reduction gear box to realize the change of the rotating speed; the torque meter is connected with the driving motor in series and used for measuring torque; and a transmission shaft of the driving motor is connected with the centrifugal water-jet propeller to be tested, so that the operation of the propeller is realized.
The invention provides the test device capable of realizing variable water depth under the mooring state of various water jet thrusters, which has the following purposes: by adopting the set of test device, the performance tests of different test water depths and various water-jet propellers can be realized.
Compared with the prior art, the invention has the following main advantages:
the performance tests of various types of water jet propellers under different water depths can be completed more quickly and conveniently.
(1) The test of the water jet propeller under different water depths can be completed:
the change of the test water depth of the water-jet propeller can be realized only by changing the position of the lifting platform, so that the loss of time and cost for building test pools with different water depths is saved.
(2) Different types of water jet propeller tests can be completed:
the overall structure of the buoyancy tank is not required to be changed, the performance test of different types of water jet propellers can be realized only by changing the buoyancy tank bottom plate installation mother plate and the buoyancy tank tail plate installation mother plate, and the preparation time and the test cost generated by test installation can be saved.
(3) By using the linear bearing, the problem of force coupling between the water jet propeller and the driving motor and between the water jet propeller and the buoyancy tank can be avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the testing apparatus of the present invention.
FIG. 2 is a schematic cross-sectional view of the testing device of the present invention.
Fig. 3 is a schematic view of the structure of the interior of the buoyancy tank equipped with a centrifugal water jet propeller.
Fig. 4 is a schematic structural view of the inside of the buoyancy tank equipped with the axial flow type waterjet propeller.
In the figure: 1. a jack; 2. a linear bearing; 3. a buoyancy tank; 4. a buoyancy tank support frame; 5. a lifting platform; 6. a thrust sensor; 7. a lifting platform connecting frame; 8. an inner rod of a shore fixed rod of the lifting platform; 9. an outer rod of the fixed rod on the bank of the lifting platform; 10. a centrifugal waterjet to be tested; 11. a drive shaft; 12. a reduction gear box; 13. a torque meter; 14. a drive motor; 15. a motherboard is installed on the bottom plate of the buoyancy tank; 16. mounting a mother board on a tail board of the buoyancy tank; 17. an axial flow waterjet to be tested.
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but the present invention is not limited thereto.
The invention provides a test device capable of realizing variable water depth under the mooring state of various water-jet propellers, which is a test device capable of completing performance tests of different test water depths and various water-jet propellers in one set of test device, the structure of the device is shown in figures 1 and 2, and the device comprises a buoyancy tank 3, a lifting platform 5, a thrust sensor 6 and an electric drive mechanism, wherein: the bottom surface of the buoyancy tank 3 is connected with the upper end of a buoyancy tank support frame 4, and the lower end of the buoyancy tank support frame 4 is fixed on the bottom of the test water tank; the lifting platform 5 is fixed by the lifting platform connecting frames 7 at the left side and the right side of the test pool and a fixed rod on the shore of the lifting platform; one end of the thrust sensor 6 is connected with the electric driving mechanism, and the other end is connected with the side wall of the test water pool.
The bottom of the buoyancy tank 3 is provided with an open tail plate, and a buoyancy tank bottom plate mounting mother plate 15 and a buoyancy tank tail plate mounting mother plate 16 are arranged at the opening.
The buoyancy tank support frame 4 is used for supporting the buoyancy tank 3. The buoyancy tank support frames are two, and the upper ends of the buoyancy tank support frames are connected with the bottom surface of the buoyancy tank 3 through four linear bearings 2. The advantage of using linear bearings 2 is that the thrust generated by the water jet during operation is not transmitted to the buoyancy tank support frame as in conventional bearings, but rather to the thrust sensor 6 outside the buoyancy tank, overcoming a small amount of axial frictional resistance of the linear bearings 2, and then to the tank wall. Through the thrust measurement mode, the coupling problem of force between the water jet propeller, the prime motor and the ship body can be effectively avoided, and the force measurement process is more visual and simpler.
The height of the lifting platform 5 can be adjusted through the jack 1, so that the water depth change in the test water pool is realized, and the method specifically comprises the following steps: the height of the fixed rod on the shore of the lifting platform can be adjusted through the four jacks 1. After the jack 1 adjusts the height of the fixed rod on the lifting platform, the inner rod 8 and the outer rod 9 of the fixed rod on the lifting platform are fixed by pins.
The buoyancy tank bottom plate installation mother plate 15 and the buoyancy tank tail plate installation mother plate 16 are rectangular plates with four rounded corners and are fixed in size. The inner hole positions and the opening sizes of the two mother boards are determined by the water jet propeller to be tested; when testing water jet propellers of different specifications, the installation mother board needs to be specially manufactured, the shape and the size of the outer edge are not changed, and the inner opening is matched with the propeller to be tested.
The onshore fixed rod of the lifting platform consists of an inner rod 8 and an outer rod 9, wherein the upper end of the inner rod 8 is connected with the connecting frame of the lifting platform, the lower end of the inner rod 8 is connected with the upper end of the outer rod 9, and the lower end of the outer rod 9 is fixed on the ground.
When the centrifugal water jet propeller test is carried out, the centrifugal water jet propeller 10 to be tested is installed on the buoyancy tank bottom plate installation mother plate 15, and at the moment, the buoyancy tank tail plate installation mother plate 16 does not need to be opened. When the axial-flow type water-jet propeller test is carried out, a water inlet flow channel of an axial-flow type water-jet propeller 17 to be tested is installed on a bottom plate installation mother plate 15 of the buoyancy tank, and a water suction pump body is installed on a coaming of a tail plate installation mother plate 16 of the buoyancy tank.
The thrust sensor 6 is installed outside the buoyancy tank and connected to the wall of the buoyancy tank 3 for pressure measurement. The thrust sensor may be a screw-type thrust sensor.
The electric driving mechanism comprises a transmission shaft 11, a reduction gear box 12, a torque meter 13 and a driving motor 14, wherein: the driving motor 14 is connected with the reduction gear box 12 to realize the change of the rotating speed; the torque meter 13 is connected with the driving motor 14 in series for measuring torque; the transmission shaft 11 of the driving motor 14 is connected with the centrifugal water-jet propeller 10 to be tested, so that the propeller can run.
The invention provides a test device capable of realizing variable water depth under the mooring state of various water-jet thrusters, which comprises the following working processes: according to the water-jet propeller to be tested, a matched buoyancy tank bottom plate installation mother plate 15 and a matched buoyancy tank tail plate installation mother plate 16 are manufactured, and the buoyancy tank tail plate installation mother plate 16 is not needed when the centrifugal water-jet propeller is carried out. And (3) installing the water jet propeller and the installation mother plate on a test device, and adjusting the water depth to the test water depth by using the jack 1. After the water surface is calm, the driving motor 14 drives the water-jet propeller to work, and the water flow is sucked through the rotation of the impeller. And after the flowing process is stable, the meters of the torque meter 13 and the thrust sensor 6 are observed for data recording.
Claims (4)
1. A test device capable of realizing variable water depth under the mooring state of various water-jet propellers is characterized in that the device is adopted to complete the performance tests of different test water depths and various water-jet propellers, and comprises a buoyancy tank (3), a lifting platform (5), a thrust sensor (6) and an electric drive mechanism; the bottom surface of the buoyancy tank (3) is connected with the upper end of the buoyancy tank support frame (4), and the lower end of the buoyancy tank is fixed on the bottom of the test water tank; the lifting platform (5) is fixed by a lifting platform connecting frame (7) at the left side and the right side of the test pool and a fixed rod on the bank of the lifting platform; one end of the thrust sensor (6) is connected with the electric driving mechanism, and the other end of the thrust sensor is connected with the side wall of the test pool;
the bottom of the buoyancy tank (3) is provided with an open tail plate, and a buoyancy tank bottom plate installation mother plate (15) and a buoyancy tank tail plate installation mother plate (16) are arranged at the opening; the mother board is a rectangular board with four rounded corners, the size is fixed, and the position of an inner hole and the size of an opening of the mother board are matched with those of a propeller to be tested;
the propeller to be tested comprises a centrifugal water jet propeller (10) to be tested and an axial flow water jet propeller (17) to be tested; when a centrifugal water jet propeller test is carried out, a centrifugal water jet propeller (10) to be tested is installed on a bottom plate installation mother plate (15) of a buoyancy tank, and an opening is not needed for a tail plate installation mother plate (16) of the buoyancy tank; when an axial flow type water jet propeller test is carried out, a water inlet flow channel of an axial flow type water jet propeller (17) to be tested is installed on a bottom plate installation mother plate (15) of a buoyancy tank, and a pump body of a water pump is installed on a coaming plate of a tail plate installation mother plate (16) of the buoyancy tank;
the number of the buoyancy tank support frames (4) is two, and the upper ends of the buoyancy tank support frames are connected with the bottom surface of the buoyancy tank (3) through four linear bearings (2);
lifting platform (5), the height of its lifting platform on-shore dead lever is adjusted through jack (1), realizes that the depth of water changes in the experimental pond, and concrete adjusting method is: the height of the onshore fixed rod of the lifting platform can be adjusted by four jacks (1), and the onshore fixed rod of the lifting platform comprises an inner rod (8) and an outer rod (9); after the jack (1) adjusts the height of a fixed rod on the bank of the lifting platform, the inner rod (8) and the outer rod (9) are fixed by pins;
the upper end of the inner rod (8) is connected with the lifting platform connecting frame, the lower end of the inner rod is connected with the upper end of the outer rod (9), and the lower end of the outer rod (9) is fixed on the ground;
installing the water jet propeller and the installation mother plate on a test device, and adjusting the water depth to the test water depth by using a jack (1); after the water surface is calm, the driving motor (14) drives the water jet propeller to work, and the water flow is sucked by the rotation of the impeller; and after the flowing process is stable, the meters of the torque meter (13) and the thrust sensor (6) are observed for data recording.
2. Test device according to claim 1, characterized in that the thrust sensor (6) is mounted outside the buoyancy tank on a wall of the tank connected to the buoyancy tank (3) for performing thrust measurements.
3. The testing device according to claim 2, characterized in that the thrust sensor (6) is a screw-type thrust sensor.
4. Test unit according to claim 1, characterized in that the electric drive comprises a drive shaft (11), a reduction gearbox (12), a torque meter (13) and a drive motor (14), wherein: the driving motor (14) is connected with the reduction gear box (12) to realize the change of the rotating speed; the torque meter (13) is connected with the driving motor (14) in series for measuring torque; a transmission shaft (11) of the driving motor (14) is connected with the centrifugal water-jet propeller (10) to be tested, so that the operation of the propeller is realized.
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| CN201710092815.0A CN106872156B (en) | 2017-02-21 | 2017-02-21 | Test device capable of realizing variable water depth under mooring state of multiple water-jet propellers |
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| CN201710092815.0A CN106872156B (en) | 2017-02-21 | 2017-02-21 | Test device capable of realizing variable water depth under mooring state of multiple water-jet propellers |
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| CN106872156B true CN106872156B (en) | 2020-01-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108751015B (en) * | 2018-05-31 | 2020-07-21 | 武汉船用机械有限责任公司 | Rotary lifting device |
| CN109470447A (en) * | 2018-11-09 | 2019-03-15 | 中国船舶工业集团公司第七0八研究所 | A kind of cycloid thruster experimental rig |
| CN110530604A (en) * | 2019-08-08 | 2019-12-03 | 中国船舶工业集团公司第七0八研究所 | A kind of hydraulic jet propulsion system under free surface incoming flow environment |
| CN110818006B (en) * | 2019-11-22 | 2022-08-30 | 暨南大学 | On-site blue algae automatic air flotation experimental device and method |
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