CN105486485B - Utilize the experimental provision of deep submergence propeller simulation stream loading - Google Patents

Abstract

The invention provides an experimental device for simulating flow load by using a deep submerged propeller, comprising a closed-loop servo system module and an automatic control module; wherein, the closed-loop servo system module and the automatic control module are used to be arranged on a ship model; the closed-loop servo system module includes Deep submerged azimuth propeller and deep submerged side thrust propeller; the automatic control module includes a six-degree-of-freedom optical motion measurement device, a thrust distribution module, a flow load database, and a thrust-speed curve storage unit; the six-degree-of-freedom motion measurement device is arranged for Speed, heading angle, and set flow velocity can be obtained by querying the flow load database through the thrust-speed curve stored in the thrust-speed curve storage unit to obtain the flow load on the ship model, and then calculated by the thrust distribution module to obtain the deep submerged full-turn propeller and deep immersion side thruster propeller thrust and angle. The invention can realize the large-scale coverage of the flow field and solve the problems of unevenness and attenuation of the traditional flow generation.

Description

Experimental setup for simulating flow loads using deeply submerged propellers

technical field

The invention relates to marine engineering, in particular to an experimental device for simulating flow load by using a deeply submerged propeller.

Background technique

Current, as one of the important marine environmental conditions, is an important test parameter that needs to be simulated in ship model tests. At present, the simulation of convection in marine engineering is usually realized by using one or more sets of jet tubes fixed on the shore or on a trailer to form a flow array to form a flow field in a certain area. Analyzing this simulation technology, it is found that its shortcomings lie in:

1. The coverage of the flow field is small, and it is difficult to cover the entire range of the pool;

2. The flow field is uneven and there is an attenuation problem;

3. When the flow tube is installed on the trailer, since the movement of the trailer will drive the movement of the flow machine, thus affecting the distribution of the flow field, the trailer cannot move at will, which brings a lot of inconvenience to the test;

4. The generated flow field turbulence phenomenon is serious;

5. The flow rate cannot be changed quickly, and the situation of variable flow rate cannot be simulated, so the flexibility of use is poor;

6. The whole set of equipment is expensive and needs to consume a lot of electric energy.

Contents of the invention

Aiming at the defects in the prior art, the object of the present invention is to provide an experimental device for simulating flow load by using a deeply submerged propeller. The purpose is to simulate the flow load more accurately in the ship model test, so as to solve the problems of limited flow generation capacity, uneven flow field, limited coverage, poor flexibility, and large power consumption in the test.

The experimental device for simulating flow load using a deep submerged propeller according to the present invention includes a closed-loop servo system module and an automatic control module;

Wherein, the closed-loop servo system module and the automatic control module are arranged on the ship model;

The closed-loop servo system module includes a deep submerged azimuth propeller and a deep submerged thruster propeller;

The automatic control module includes a six-degree-of-freedom optical motion measurement device, a thrust distribution module, a flow load database, and a thrust-speed curve storage unit;

The six-degree-of-freedom motion measurement device is arranged to query the flow load database through the thrust-speed curve stored in the thrust-speed curve storage unit according to the ship speed, heading angle and set flow velocity to obtain the flow load suffered by the ship model , and then the thrust and angle of the deep submerged azimuth propeller and the deep submerged side thrust propeller are calculated by the thrust distribution module.

Preferably, the deep submerged azimuth propeller includes a steering gear, a first servo motor, a first fixed frame, a first bushing, a first transmission device, a rotation angle sensor and a first propeller;

Wherein, the first motor shaft of the first servo motor passes through the first bushing to drive the blades of the first propeller to rotate through the first transmission device;

The steering gear and the first servo motor are arranged on the first fixed frame; the first propeller is arranged on the first bushing;

The steering gear drives the first bushing to rotate in the circumferential direction, and then drives the base of the first propeller to rotate in the circumferential direction; the rotation angle sensor is used to measure the rotation angle of the first bushing.

Preferably, the steering gear includes a steering gear body, a steering gear shaft and a flat pulley transmission;

Wherein, the main body of the steering gear is connected with the first lower bottom plate of the fixed frame, the shaft of the steering gear is connected with the main body of the steering gear through a first coupling, and the shaft of the steering gear drives the main body of the steering gear through a flat pulley transmission. Shaft fits.

Preferably, the first servo motor includes a first servo motor body and a first motor shaft;

Wherein, the first motor shaft is connected to the main body of the first servo motor through the second coupling, the first motor shaft penetrates the first lower bottom plate of the first fixed frame and is connected to the first fixed frame through the first bearing connected to the first bottom plate.

Preferably, the first fixed frame includes a first lower base plate and a first lower base plate;

The first lower bottom plate is a first box-shaped structure formed by welding the first lower bottom plate with the first welding structure;

The first shaft sleeve is fixed on the first lower bottom plate through a first bearing.

Preferably, the first transmission device is a bevel gear transmission device.

Preferably, the rotation angle sensor is fixed on the first lower bottom plate of the first fixed frame.

Preferably, the first propeller includes a first propeller body and a first propeller shaft;

The first propeller body is fixed on the first propeller shaft by bolts, the first propeller shaft is connected with the first bushing through the second bearing and the third bearing, and the first motor shaft of the first servo motor passes through The first transmission device drives the first propeller shaft to rotate.

Preferably, the deep submerged thruster propeller includes a second servo motor, a second fixed frame, a second bushing, a second transmission device and a second propeller;

Wherein, the second servo motor includes a second servo motor body and a second motor shaft, and the second motor shaft is connected to the second servo motor body through a second coupling;

The second motor shaft passes through the second lower bottom plate of the second fixed frame and is connected to the second lower bottom plate of the second fixed frame through a fourth bearing;

The second fixed frame includes a second lower bottom plate and a second lower bottom plate; the second lower bottom plate is a second box-shaped structure formed by welding the second lower bottom plate with the second lower bottom plate through welding structural parts;

The second shaft sleeve is fixed on the second lower bottom plate of the second fixed frame through the fourth bearing, and the second transmission device adopts a bevel gear transmission device;

The second propeller includes a second propeller main body and a second propeller shaft, the second propeller main body is fixed on the second propeller shaft by bolts, and the second propeller is connected to the second shaft sleeve through the fifth bearing and the sixth bearing connected, the second propeller shaft transmission and the second motor shaft of the second servo motor rotate with the second propeller shaft through the second transmission device.

Preferably, the first lower bottom plate and the second lower bottom plate are used to be fixed on the deck of the ship model.

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

1. The present invention can realize a large-scale coverage of the flow field, and solve the problem of unevenness and attenuation of the traditional flow;

2. The present invention can simulate various flow field conditions;

3. The burial depth of the propeller of the present invention is relatively large, cavitation is not easy to occur, and the interference between the propeller and the ship can be reduced, making the simulation more accurate;

4. The present invention can give the value of flow load in real time, which solves the problem that it is difficult to directly measure in traditional tests;

5. The present invention makes full use of the flow load database to make the simulation more accurate;

6. The present invention can quickly reach stability in the test without waiting time, which improves the efficiency of the test;

7. The present invention can greatly reduce the electric energy required for simulating the flow field, and is environmentally friendly;

8. The present invention is easy to use and can be applied only by making small changes to the ship model;

9. The present invention is a closed-loop control system without manual intervention;

10. The invention is easy to install and has no great influence on the shape of the ship.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the front schematic view of the present invention;

Fig. 3 is a schematic top view of the present invention;

Fig. 4 is a schematic structural view of a deep submerged full-rotation propeller in the present invention;

Fig. 5 is a schematic front view of a deep submerged full-turn propeller in the present invention;

Fig. 6 is the structural representation of motor among the present invention;

Fig. 7 is a schematic structural view of a fixed frame in the present invention;

Fig. 8 is the structural representation of steering gear in the present invention;

Fig. 9 is a structural schematic diagram of an angle sensor in the present invention;

Fig. 10 is a schematic structural view of the transmission device in the present invention;

Fig. 11 is a structural schematic diagram of a deep submerged side thruster propeller in the present invention;

Fig. 12 is a schematic front view of a deep submerged side thruster propeller in the present invention;

Fig. 13 is a flowchart of flow load simulation in the present invention;

Fig. 14 is a schematic diagram of the arrangement of deep submerged propellers in the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

In this embodiment, the experimental device for simulating flow load using a deeply submerged propeller provided by the present invention includes a closed-loop servo system module and an automatic control module;

Wherein, the closed-loop servo system module and the automatic control module are arranged on the ship model;

The closed-loop servo system module includes a deep submerged azimuth propeller 1 and a deep submerged thruster propeller 2;

The automatic control module includes a six-degree-of-freedom optical motion measurement device, a thrust distribution module, a flow load database, and a thrust-speed curve storage unit;

The six-degree-of-freedom motion measurement device is arranged to query the flow load database through the thrust-speed curve stored in the thrust-speed curve storage unit according to the ship speed, heading angle and set flow velocity to obtain the flow load suffered by the ship model , and then the thrust and angle of the deep submerged azimuth propeller 1 and the deep submerged side thrust propeller 2 are calculated by the thrust distribution module.

The deep submerged full-turn propeller 1 includes a steering gear 3, a first servo motor 4, a first fixed frame 8, a first bushing 16, a first transmission device 6, a rotation angle sensor 7 and a first propeller 5; wherein, the The first motor shaft 15 of the first servo motor 4 passes through the first shaft sleeve 16 to drive the blades of the first propeller 5 to rotate through the first transmission device 6; the steering gear 3, the first servo motor 4 Set on the first fixed frame 8; the first propeller 5 is set on the first bushing 16; the steering gear 3 drives the first bushing 16 to rotate in the circumferential direction, and then drives the The base of the first propeller 5 rotates in the circumferential direction; the rotation angle sensor 7 is used to measure the rotation angle of the first sleeve 16 .

The steering gear 3 includes a steering gear main body 9, a steering gear shaft 10 and a flat pulley transmission 11; wherein, the steering gear main body 9 is connected to the first upper bottom plate 12 of the fixed frame 8, and the steering gear shaft 10 passes through The first shaft coupling 13 is connected with the steering gear main body 9, and the steering gear shaft 10 drives the shaft sleeve 16 through the flat pulley transmission 11 to cooperate.

The first servo motor 4 includes a first servo motor body 14 and a first motor shaft 15; wherein, the first motor shaft 15 is connected to the first servo motor body 14 through a second coupling 17, and the first A motor shaft 15 penetrates through the first lower bottom plate 18 of the first fixed frame 8 and is connected with the first lower bottom plate 18 of the first fixed frame through a first bearing 19 .

The first fixed frame 8 includes a first lower bottom plate 18 and a first upper bottom plate 12; the first lower bottom plate 18 is a first box-shaped structure 24 formed by welding the first lower bottom plate 18 with the first upper bottom plate 12; The first shaft sleeve 16 is fixed on the first lower bottom plate 18 through a first bearing 19 .

The first transmission device 6 is a bevel gear transmission device. The rotation angle sensor 7 is fixed on the first lower bottom plate 18 of the first fixed frame 8 . The first propeller 5 includes a first propeller main body 20 and a first propeller shaft 21; the first propeller main body 20 is fixed on the first propeller shaft 21 by bolts, and the first propeller shaft 21 is passed through a second bearing 22 and The third bearing 23 is connected with the first shaft sleeve 16 , and the first motor shaft 15 of the first servo motor 4 drives the first propeller shaft 21 to rotate through the first transmission device 6 .

The deep submerged side thruster propeller 2 includes a second servo motor, a second fixed frame, a second bushing, a second transmission device, and a second propeller; wherein, the second servo motor includes a second servo motor body and a second Motor shaft, the second motor shaft is connected with the second servo motor main body through the second coupling; the second motor shaft passes through the second lower bottom plate 26 of the second fixed frame and connects with the second motor shaft through the fourth bearing The second lower bottom plate 26 of the second fixed frame is connected; the second fixed frame includes the second lower bottom plate 26 and the second upper bottom plate; the second lower bottom plate 26 is formed by welding the second upper bottom plate with the welding structure The second box structure 28; the second axle sleeve is fixed on the second upper base plate of the second fixed frame through the fourth bearing, and the second transmission device adopts a bevel gear transmission device; the second propeller includes a second The propeller main body and the second propeller shaft, the second propeller main body is fixed on the second propeller shaft by bolts, the second propeller is connected with the second bushing through the fifth bearing and the sixth bearing, the second propeller The second motor shaft of the shaft transmission and the second servo motor rotates with the second propeller shaft through the second transmission device.

The first lower bottom plate 12 and the second upper bottom plate 27 are used to be fixed on the deck 29 of the ship model.

The working principle of the experimental device for simulating flow loads provided by the present invention is as shown in Figure 13. In the model test, the test flow velocity is set in advance, and the ship speed and rotation angle are obtained by real-time measurement and calculation by the six-degree-of-freedom optical motion acquisition system. Input the test flow velocity, ship speed and rotation angle into the workstation, combined with the flow load database obtained from the flow tunnel test, output the resultant force of the flow load, and then obtain the thrust magnitude and direction of all propellers through the thrust distribution module, where the thrust magnitude component is passed through the established Check the corresponding motor speed from the thrust-speed curve and input the speed into the closed-loop servo system, and ensure that the speed of the motor is the required speed through the servo motor and its own servo motor encoder; the thrust direction (rotation angle) component is similarly input The closed-loop servo system of rotation angle ensures that the rotation angle of the steering gear is the required rotation angle through the steering gear and the rotation angle sensor, so as to realize the real-time simulation of the convective load; The measurement is carried out by the high-degree optical motion measurement system, which is used as the input for calculating the flow load at the next moment, so as to realize automatic control.

In the thrust distribution module of the automatic control module, under the premise that the simulation effect of the mid-flow load can be achieved in the test, the arrangement of the deep submerged propeller of the present invention is shown in Figure 14. A deep submerged side thruster propeller is installed at the centerline. The thrust of the deep submerged azimuth propeller can be changed arbitrarily in the range of 360°, while the thrust of the deep submerged side thrust propeller is only in the directions of 90° and 270°. According to the installation positions of the two propellers, the thrust and the corresponding rotation angles of the two deeply submerged propellers can be obtained by the thrust distribution module.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims (10)

1. a kind of experimental provision using deep submergence propeller simulation stream loading, it is characterised in that including closed loop servo system mould Block and automatic control module；

Wherein, the closed loop servo system module and the automatic control module are used to be arranged on ship model；

The closed loop servo system module includes deep submergence full circle swinging propeller (1) and deep submergence side pushes away propeller (2)；

The automatic control module include six degree of freedom optical motion measuring device, thrust distribution module, stream loading database with And thrust-speed curves storage unit；

The six degree of freedom optical motion measuring device arrangement is used for according to ship's speed, bow to the flow velocity of angle and setting by pushing away The stream that the thrust stored in power-speed curves storage unit-speed curves inquiry stream loading database is tried to achieve suffered by ship model carries Lotus, and then deep submergence full circle swinging propeller (1) is calculated and submerges side deeply by thrust distribution module and pushes away pushing away for propeller (2) Power and angle.

2. the experimental provision according to claim 1 using deep submergence propeller simulation stream loading, it is characterised in that described Deep submergence full circle swinging propeller (1) includes steering engine (3), the first servomotor (4), the first fixed frame (8), the first axle sleeve (16), the first transmission device (6), rotary angle transmitter (7) and the first propeller (5)；

Wherein, the first motor shaft (15) of first servomotor (4) passes through described first through first axle sleeve (16) Transmission device (6) drives the blade of first propeller (5) to rotate；

The steering engine (3), the first servomotor (4) are arranged on first fixed frame (8)；First propeller (5) It is arranged on first axle sleeve (16)；

The steering engine (3) drives first axle sleeve (16) circumferentially rotatable, and then drives the base of first propeller (5) It is circumferentially rotatable；The rotary angle transmitter (7) is used for the rotation angle for measuring first axle sleeve (16).

3. the experimental provision according to claim 2 using deep submergence propeller simulation stream loading, it is characterised in that described Steering engine (3) includes the peaceful belt wheel transmission device (11) of steering engine main body (9), steering engine axis (10)；

Wherein, the steering engine main body (9) is connected with the first upper plate (12) of the first fixed frame (8), the steering engine axis (10) it is connected by first shaft coupling (13) with steering engine main body (9), the steering engine axis (10) passes through flat rubber belting wheel transmission device (11) first axle sleeve (16) is driven to be engaged.

4. the experimental provision according to claim 2 using deep submergence propeller simulation stream loading, it is characterised in that described First servomotor (4) includes the first servomotor main body (14) and the first motor shaft (15)；

Wherein, first motor shaft (15) is connected by second shaft coupling (17) with the first servomotor main body (14), institute The first motor shaft (15) is stated to penetrate the first lower plate (18) of the first fixed frame (8) and by clutch shaft bearing (19) and first consolidate The first lower plate (18) for determining frame is connected.

5. the experimental provision according to claim 2 using deep submergence propeller simulation stream loading, it is characterised in that described First fixed frame (8) includes the first lower plate (18) and the first upper plate (12)；

First lower plate (18) forms the first box-structure by the first welding structural element and the first upper plate (12) welding (24)；

First axle sleeve (16) is fixed on first lower plate (18) by clutch shaft bearing (19).

6. the experimental provision according to claim 2 using deep submergence propeller simulation stream loading, it is characterised in that described First transmission device (6) is Conical gear actuator.

7. the experimental provision according to claim 5 using deep submergence propeller simulation stream loading, it is characterised in that described Rotary angle transmitter (7) is fixed on the first lower plate (18) of the first fixed frame (8).

8. the experimental provision according to claim 2 using deep submergence propeller simulation stream loading, it is characterised in that described First propeller (5) includes the first propeller main body (20) and the first propeller shaft (21)；

The first propeller main body (20) is secured by bolts on the first propeller shaft (21), first propeller shaft (21) it is connected by second bearing (22) and 3rd bearing (23) with first axle sleeve (16), the first servomotor (4) First motor shaft (15) drives first propeller shaft (21) to rotate by first transmission device (6).

9. the experimental provision according to claim 5 using deep submergence propeller simulation stream loading, it is characterised in that described Deep submergence side, which pushes away propeller (2), includes the second servomotor, the second fixed frame, the second axle sleeve, the second transmission device and the Two propellers；

Wherein, second servomotor includes the second servomotor main body and the second motor shaft, and second motor shaft passes through Second shaft coupling is connected with the second servomotor main body；

Second motor shaft passes through the second lower plate (26) of second fixed frame and is consolidated by fourth bearing and second The second lower plate for determining frame is connected；

Second fixed frame includes the second lower plate (26) and the second upper plate (27)；Second upper plate passes through welding structure Part forms the second box-structure with second lower plate (26) welding；

Second axle sleeve is fixed on the second lower plate (26) of the second fixed frame by fourth bearing, second transmission Device uses Conical gear actuator；

Second propeller includes the second propeller main body and the second propeller shaft, and the second propeller main body passes through bolt It is fixed on the second propeller shaft, second propeller is connected by 5th bearing and 6th bearing with the second axle sleeve, the Second motor shaft of two servomotors is rotated by the second propeller shaft described in the second actuator drives.

10. the experimental provision according to claim 9 using deep submergence propeller simulation stream loading, it is characterised in that institute State the first upper plate (12) and second upper plate (27) is fixed on the deck (29) of the ship model.