CN106872156B - Test device capable of realizing variable water depth under mooring state of multiple water-jet propellers - Google Patents

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

A test device capable of realizing variable water depth in mooring states of various water jets

technical field

The invention relates to the field of ship propulsion, in particular to a performance test of a mooring water jet propulsion under the condition of changing water depth.

Background technique

During the sailing process of the water jet propulsion ship, the propulsion performance of the installed water jet propulsion will vary significantly with the change of the water depth of the navigable waters. At present, the test of water jet propulsion performance is mainly carried out on conventional test benches such as open water pump test benches. However, the existing conventional test benches are difficult to test the performance of water jet propulsion devices in shallow waters and cannot fully and accurately simulate the performance of water jet propulsion devices. Actual operating conditions of water jets. Therefore, in order to simulate the various complex working conditions of the azimuth waterjet during the navigation of the waterjet ship in deep water, the ship entering the water or the landing process, so as to predict the propulsion performance of the waterjet more accurately, it is necessary to design A propulsion performance test device that can realize the change of water jet propulsion with water depth in moored state.

SUMMARY OF THE INVENTION

The technical problems to be solved by the present invention are: how to measure the thrust generated by the water jet, how to realize the change of the water jet test water depth, and how to realize the performance test of various types of water jet.

The present invention solves its technical problem and adopts following technical scheme:

The test device provided by the present invention can realize variable water depth under the mooring state of various water jets, including a floating box, a lifting platform, a thrust sensor and an electric drive mechanism; the bottom surface of the floating box and the upper end of the supporting frame of the floating box The lower end is fixed on the bottom of the test pool; the lifting platform is fixed by the lifting platform connecting frame on the left and right sides of the test pool and the fixing rod on the shore of the lifting platform; one end of the thrust sensor is connected with the electric drive mechanism, and the other end is connected with the test pool connected to the side walls.

The floating box has an opening tail plate at the bottom, and the opening is equipped with a floating box bottom plate installation motherboard and a floating box tail plate mounting motherboard; the motherboard is a rectangular plate with rounded four corners, and the size is fixed. , the position of the inner hole and the size of the opening match the propeller to be tested.

The propeller to be tested includes the centrifugal water jet to be tested and the axial flow water jet to be tested; during the centrifugal water jet test, the centrifugal water jet to be tested It is installed on the mounting motherboard of the bottom plate of the floating tank, and the mounting motherboard of the tail plate of the floating tank does not need to have an opening; when the axial-flow water-jet propulsion test is carried out, the axial-flow water-jet thruster to be tested is installed in the water inlet channel. On the base plate of the floating tank, the pump body of the pump is installed on the coaming of the base plate of the floating tank.

There are two supporting frames for the floating box, and the upper ends thereof are connected with the bottom surface of the floating box through four linear bearings.

For the lifting platform, the height of the fixed rod on the shore of the lifting platform is adjusted by jacks, so as to realize the change of water depth in the test pool. The rod includes an inner rod and an outer rod; after the jack adjusts the height of the fixed rod on the shore of the lifting platform, the inner rod and the outer rod are fixed with pins.

The upper end of the inner rod is connected with the lifting platform connecting frame, and the lower end 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 installed on the outside of the floating box and connected to the pool wall of the floating box, and is used to measure the thrust.

The thrust sensor adopts a threaded thrust sensor.

The electric drive mechanism includes a transmission shaft, a reduction gear box, a torque meter and a drive motor, wherein: the drive motor is connected with the reduction gear box to realize the change of the rotational speed; the torque meter and the drive motor are connected in series to measure the torque; the drive motor The drive shaft is connected with the centrifugal water jet to be tested to realize the operation of the propeller.

The above-mentioned test device for realizing variable water depth in mooring state of various water jets provided by the present invention is used for: using this set of test devices, different test water depths and the performance of various water jets can be realized. test.

Compared with the prior art, the present invention has the following main advantages:

It is faster and more convenient to complete the performance test of various types of water jet propulsion under different water depths.

(1) The test of water jet propulsion under different water depths can be completed:

It is only necessary to change the position of the lifting platform to realize the change of the water jet test water depth, which saves the time and cost of constructing test pools with different water depths.

(2) Different types of water jet propulsion tests can be completed:

There is no need to change the overall structure of the pontoon, but only need to change the base plate of the pontoon and the tail of the pontoon, and then the performance test of different types of water jets can be realized, which can save the preparation time and cost of the test installation. test fee.

(3) The use of linear bearings can avoid the problem of force coupling between the water jet propulsion and the drive motor and the floating box.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the test device of the present invention.

FIG. 2 is a schematic diagram of the cross-sectional structure of the test device of the present invention.

FIG. 3 is a schematic structural diagram of the interior of a floating tank equipped with a centrifugal water jet.

FIG. 4 is a schematic structural diagram of the interior of a pontoon equipped with an axial-flow water jet.

In the figure: 1. Jack; 2. Linear bearing; 3. Floating box; 4. Floating box support frame; 5. Lifting platform; 6. Thrust sensor; 7. Lifting platform connecting frame; Rod; 9. Outer rod of lifting platform shore fixed rod; 10. Centrifugal water jet to be tested; 11. Transmission shaft; 12. Reduction gearbox; 13. Torque meter; 14. Drive motor; 15. Floating box The bottom plate is installed with the motherboard; 16. The floating box tail plate is installed with the motherboard; 17. The axial flow water jet to be tested.

Detailed ways

The present invention will be further described below with reference to the embodiments and the accompanying drawings, but the present invention is not limited.

The test device provided by the invention can realize the variable water depth under the mooring state of various water jets, and is a test device that can complete different test water depths and performance tests of various water jets in one set of test devices , the structure of the device is shown in Figures 1 and 2, including a floating box 3, a lifting platform 5, a thrust sensor 6 and an electric drive mechanism, wherein: the bottom surface of the floating box 3 is connected to the upper end of the floating box support frame 4, and the floating box supports The lower end of the frame 4 is fixed on the bottom of the test pool; the lifting platform 5 is fixed by the lifting platform connecting frame 7 on the left and right sides of the test pool and the fixing rod on the shore of the lifting platform; one end of the thrust sensor 6 is connected with the electric drive mechanism, and the other end is connected with the electric drive mechanism. Connected to the side wall of the test pool.

The bottom of the pontoon 3 is provided with an opening tail plate, and the pontoon bottom plate mounting motherboard 15 and the pontoon tail plate mounting motherboard 16 are installed at the opening.

The floating box support frame 4 is used to support the floating box 3 . There are two floating box supporting frames, and the upper end thereof and the bottom surface of the floating box 3 are connected by four linear bearings 2 . The advantage of using the linear bearing 2 is that the thrust generated by the water jet propulsion will not be transmitted to the support frame of the floating box like a conventional bearing, but will be transmitted to the outer side of the floating box after overcoming a small amount of axial frictional resistance of the linear bearing 2. Thrust sensor 6, and then transmitted to the pool wall. Through such a thrust measurement method, the problem of force coupling between the water jet propulsion, the prime mover and the hull can be effectively avoided, making the force measurement process more intuitive and simple.

The height of the lifting platform 5 can be adjusted by the jacks 1, so that the water depth in the test pool can be changed. After the jack 1 adjusts the height of the fixed rod on the shore of the lifting platform, the inner rod 8 and the outer rod 9 of the fixed rod on the shore of the lifting platform are fixed with pins.

The mounting motherboard 15 for the bottom plate of the floating box and the mounting motherboard 16 for the tail plate of the floating box are rectangular plates with rounded four corners, and the dimensions are fixed. The inner hole position and opening size of the two motherboards are determined by the water jet to be tested; when testing water jets of different specifications, the mounting motherboard needs to be specially made, the shape and size of the outer edge remain unchanged, and the internal opening is the same as the one to be tested. thrusters to match.

The fixed rod on the shore of the lifting platform is composed of an inner rod 8 and an outer rod 9, wherein the upper end of the inner rod 8 is connected with the lifting platform connecting frame, 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 test is performed, the centrifugal water jet 10 to be tested is installed on the mounting motherboard 15 of the bottom plate of the pontoon. During the test of the axial-flow water jet, the water inlet channel of the axial-flow water jet 17 to be tested is installed on the installation motherboard 15 of the bottom plate of the floating tank, and the pump body of the suction pump is installed on the installation motherboard of the tail plate of the floating tank. 16 on the hoarding.

The thrust sensor 6 is installed on the outside of the floating tank and is connected to the tank wall of the floating tank 3 for pressure measurement. The thrust sensor can be a threaded thrust sensor.

The electric drive mechanism includes a transmission shaft 11 , a reduction gear box 12 , a torque meter 13 and a drive motor 14 , wherein: the drive motor 14 is connected with the reduction gear box 12 to realize the change of rotational speed; the torque meter 13 is connected in series with the drive motor 14 It is used to measure the torque; the transmission shaft 11 of the driving motor 14 is connected with the centrifugal water jet propeller 10 to be tested to realize the operation of the propeller.

The test device provided by the present invention can realize the variable water depth under the mooring state of various water jets. The tail plate is installed with the motherboard 16, and the tail plate of the floating box is not required to be installed with the motherboard 16 when the centrifugal water jet is used. Install the water jet and the installation master on the test device, and use the jack 1 to adjust to the test water depth. After the water surface is calm, the driving motor 14 drives the water jet to work, and the water flow is suctioned through the rotation of the impeller. After the flow process is stable, observe the meters of the torque meter 13 and the thrust sensor 6 for data recording.

Claims (4)

1. a test device that can realize variable water depth under the mooring state of multiple water jets, is characterized in that using this set of devices to complete the performance test of different test water depths and multiple water jets, the device includes The floating box (3), the lifting platform (5), the thrust sensor (6) and the electric drive mechanism; the bottom surface of the floating box (3) is connected with the upper end of the floating box support frame (4), and the lower end of the floating box (3) is fixed on the bottom of the test pool. On the bottom of the pool; the lifting platform (5) is fixed by the lifting platform connecting frame (7) on the left and right sides of the test pool and the fixing rod on the shore of the lifting platform; one end of the thrust sensor (6) is connected with the electric drive mechanism, and the other end is connected with the test pool connected to the side walls; The floating box (3) is provided with an opening tail plate at the bottom, and the opening is provided with a floating box bottom plate installation mother board (15) and a floating box tail plate installation mother board (16); The rectangular plate with rounded four corners has a fixed size, and its inner hole position and opening size match the propeller to be tested; The propeller to be tested includes a centrifugal water jet propeller (10) to be tested and an axial flow water jet propeller (17) to be tested; when the centrifugal water jet propeller is tested, the The centrifugal water jet propulsion (10) is installed on the mounting mother board (15) of the bottom plate of the pontoon, and at this time the mounting mother board (16) of the tail plate of the pontoon does not need to be opened; during the test of the axial flow water jet , the water inlet channel of the axial-flow water jet propulsion (17) to be tested is installed on the mounting motherboard (15) of the bottom plate of the floating tank, and the pump body of the suction pump is mounted on the coaming plate of the mounting motherboard (16) on the bottom plate of the floating tank ; There are two floating box supporting frames (4), the upper ends of which are connected with the bottom surface of the floating box (3) through four linear bearings (2); In the lifting platform (5), the height of the fixed rod on the shore of the lifting platform can be adjusted by the jack (1) to realize the change of the water depth in the test pool. The specific adjustment method is as follows: the height of the fixed rod on the lifting platform can be adjusted by four jacks ( 1) For adjustment, the lifting platform shore fixing rod includes an inner rod (8) and an outer rod (9); after the jack (1) adjusts the height of the lifting platform shore fixing rod, the inner rod (8) and the outer rod (9) fixed with pins; The upper end of the inner rod (8) is connected with the lifting platform connecting frame, the lower end 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; Install the water jet and the installation master on the test device, and use the jack (1) to adjust to the test water depth; after the water surface is calm, the drive motor (14) drives the water jet to work, and the water flow is pumped through the rotation of the impeller ; After the flow process is stable, observe the meters of the torque meter (13) and the thrust sensor (6) for data recording. 2 . The test device according to claim 1 , wherein the thrust sensor ( 6 ) is installed on the outside of the floating box and connected to the pool wall of the floating box ( 3 ) to realize thrust measurement. 3 . 3 . The test device according to claim 2 , wherein the thrust sensor ( 6 ) adopts a threaded thrust sensor. 4 . 4. The test device according to claim 1, characterized in that the electric drive mechanism comprises a transmission shaft (11), a reduction gear box (12), a torque meter (13) and a drive motor (14), wherein: The drive motor (14) is connected with the reduction gear box (12) to realize the change of the rotational speed; the torque meter (13) is connected in series with the drive motor (14) to measure the torque; the transmission shaft (11) of the drive motor (14) is connected to the The tested centrifugal water jet thrusters (10) are connected to realize the operation of the thrusters.

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