Auxiliary icebreaking device based on gravity flow method

Abstract

The invention discloses an auxiliary icebreaking device based on a gravity flow method, which comprises a water tank, guide rails are arranged on two sides of the water tank, sliding blocks are mounted on the guide rails, the sliding blocks of the guide rails on two sides are connected through a connecting plate, a driving device is mounted on the connecting plate, and the lower part of the connecting plate is connected with a hull model through a connecting rod. Air outlet holes are formed in the two sides of a ship bow waterline of the ship body model, the air outlet holes are connected with an air conveying pipeline, the air conveying pipeline is connected with a high-pressure air source system, nozzle devices are installed on the air outlet holes, and a downward inclination angle of 8-14 degrees is formed between the axis direction of each nozzle device and the waterline plane; an adjusting stop valve and a pressure reducing valve are arranged on the gas conveying pipeline, a pressure sensor is arranged on the gas conveying pipeline, the pressure sensor is connected with a controller, and the controller is connected with the stop valve and the pressure reducing valve. According to the auxiliary ice breaking device based on the gravity flow method, ice breaking is assisted through the air cavity ice breaking principle. The method can reduce the icebreaking resistance of the ship and improve the icebreaking efficiency.

Description

Technical Field

[0001] The present invention relates to an auxiliary ice-breaking device based on the gravity flow method, belonging to the fields of fluid mechanics and ships. Background Art

[0002] The existing icebreakers in China (such as the "Snow Dragon 2") only have medium and low ice-class ice-breaking capabilities and cannot meet the long-term needs in the high-ice condition waters of the Arctic. The hovercraft performs excellently in ice-breaking. Its principle is to inject air under the ice to form an air cavity, making the ice layer lose elastic support, thereby reducing the ice-breaking resistance and improving the ice-breaking ability. Currently, this technology is mainly used for inland river patrols but has not been applied to polar icebreakers. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the present invention provides an auxiliary ice-breaking device based on the gravity flow method to assist ice-breaking by using the air cavity ice-breaking principle. This method can reduce the ice-breaking resistance of the ship and improve the ice-breaking efficiency.

[0004] Technical Solution: To solve the above technical problems, an auxiliary ice-breaking device based on the gravity flow method of the present invention includes a water tank. Guide rails are provided on both sides of the water tank. Sliders are installed on the guide rails. The sliders on both guide rails are connected by a connecting plate. A driving device is installed on the connecting plate. The lower part of the connecting plate is connected to a hull model through a connecting rod. Air outlet holes are arranged on both sides of the waterline at the bow of the hull model. The air outlet holes are connected to an air delivery pipeline, and the air delivery pipeline is connected to a high-pressure air source system. A nozzle device is installed on the air outlet hole. The axis direction of the nozzle device forms a downward inclination angle of 8° - 14° with the waterline plane; a regulating stop valve and a pressure reducing valve are arranged on the air delivery pipeline. A pressure sensor is provided on the air delivery pipeline. The pressure sensor is connected to a controller, and the controller is connected to the stop valve and the pressure reducing valve.

[0005] Preferably, the driving device includes a driving motor. A driving gear is provided on the motor shaft of the driving motor. The driving gear meshes with a driven gear. The driven gear is installed on a driven shaft. The driven shaft is fixed to the connecting plate through a bearing. Driving gears are fixedly connected to both ends of the driven shaft. A rack is provided on the guide rail. The driving gear meshes with the rack, and the connecting plate is driven to move by the driving gear.

[0006] Preferably, the angle of the downward inclination is 10° - 12°.

[0007] Preferably, the angle of the downward inclination is 10°.

[0008] Preferably, the diameter of the air outlet hole is 1 - 2 mm.

[0009] Advantageous Effects: Compared with the prior art, the present invention has the following advantages

[0010] ①Compared with the case without air injection, the ice load on the ship is significantly reduced, effectively improving the icebreaking efficiency of the ship and making the ship sail more smoothly in ice-covered waters.

[0011] ②The present invention can adjust the air flow parameters according to the actual ice conditions and has strong adaptability.

[0012] ③Compared with traditional icebreaking methods, the present invention can reduce the impact on the hull structure and propulsion system and improve the durability of the icebreaker.

[0013] ④Compared with traditional hovercrafts, the method of opening holes in the bow of the ship has higher flexibility and can be extended to other polar navigation ships, having important engineering value and economic benefits. Description of the Drawings

[0014] Figure 1 General schematic diagram of the present invention.

[0015] Figure 2 Schematic diagram of the air outlet holes in the present invention.

[0016] Figure 3 Schematic diagram of the drive of the present invention.

[0017] In the figure: 1. Trailer; 2. Connecting rod; 3. Ship model; 4. Air outlet hole; 5. Air outlet pipe; 6. Hose; 7. Gas source system; 8. Pressure reducing valve; 9. Water tank; 10. Ice surface; 11. Driving gear; 12. Connecting plate; 13. Rack; 14. Driven gear; 15. Driving motor; 16. Driven shaft. Detailed Embodiment

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] As Figures 1 to 3 shown, an auxiliary icebreaking device based on the gravity flow method of the present invention includes a water tank. Guide rails are provided on both sides of the water tank, and sliders are installed on the guide rails. The sliders on both sides of the guide rails are connected by a connecting plate. A driving device is installed on the connecting plate. The lower part of the connecting plate is connected to the hull model through a connecting rod. Air outlet holes are arranged on both sides of the bow waterline of the hull model. The diameter of the air outlet holes is 1-2 mm. The air outlet holes are connected to an air delivery pipeline, and the air delivery pipeline is connected to a high-pressure gas source system. A nozzle device is installed on the air outlet holes. The axis direction of the nozzle device forms a downward inclination angle of 8°-14° with the waterline surface. The preferred angle of the downward inclination is 10°-12°, and the most suitable angle of the downward inclination is 10°. A regulating stop valve and a pressure reducing valve are arranged on the air delivery pipeline. A pressure sensor is arranged on the air delivery pipeline. The pressure sensor is connected to a controller, and the controller is connected to the stop valve and the pressure reducing valve.

[0020] In the present invention, the driving device comprises a driving motor. A driving gear is provided on the motor shaft of the driving motor. The driving gear meshes with a driven gear. The driven gear is mounted on a driven shaft. The driven shaft is fixed to a connecting plate through bearings. Driving gears are fixedly connected to both ends of the driven shaft. A rack is provided on a guide rail. The driving gears mesh with the rack, and the connecting plate is driven to move by the driving gears.

[0021] In the present invention, the hull model simulates the "Xue Long 2" polar research vessel according to a scale ratio of 1:60. The main technical parameters include: total length 2.04 m, molded breadth 0.37 m, designed draft 0.13 m, and air outlets are innovatively arranged on both sides of the bow waterline. The jet system consists of a high-pressure gas source system, two gas pipelines and a double-nozzle assembly. The core component of the system is the nozzle device symmetrically arranged on both sides of the bow waterline. Its installation position is close to the waterline surface, and the axis forms a 10° downward inclination angle with the waterline surface. The device uses precision nozzles with a diameter of 1 mm and forms a closed-loop connection with the gas source system through the gas outlet pipe. During the operation of the system, by coordinately adjusting the stop valve and the pressure reducing valve, precise control of the gas flow rate can be achieved to ensure the best ice-breaking effect at different ship speeds and jet gas flow rates. The pressure measurement system is jointly composed of a pressure sensor, a data acquisition system and a data storage system. The driving system consists of a track and a trailer located at the top of the side wall of the water tank. The trailer moves in a uniform straight line to drive the hull to move in a straight line in the water tank to complete the measurement of ice resistance.

[0022] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An auxiliary ice-breaking device based on a gravity flow method, characterized in that: The invention comprises a water tank, guide rails are arranged on both sides of the water tank, sliders are installed on the guide rails, the sliders of the guide rails on both sides are connected by connecting plates, a driving device is installed on the connecting plates, the lower part of the connecting plates is connected to the hull model by connecting rods, air outlets are arranged on both sides of the bow waterline of the hull model, the air outlets are connected to the gas pipeline, the gas pipeline is connected to the high-pressure gas source system, a nozzle device is installed on the air outlet, the axial direction of the nozzle device forms a downward inclination angle of 8°-14° with the waterline; a regulating stop valve and a pressure reducing valve are arranged on the gas pipeline, a pressure sensor is arranged on the gas pipeline, the pressure sensor is connected to the controller, and the controller is connected to the stop valve and the pressure reducing valve.

2. The auxiliary ice breaking device based on the gravity flow method according to claim 1 is characterized in that: The driving device includes a driving motor, a driving gear is provided on the motor shaft of the driving motor, the driving gear is meshed with a driven gear, the driven gear is installed on the driven shaft, the driven shaft is fixed to the connecting plate through a bearing, both ends of the driven shaft are fixedly connected with driving gears, a rack is provided on the guide rail, the driving gear is meshed with the rack, and the connecting plate is driven to move through the driving gear.

3. The auxiliary ice breaking device based on the gravity flow method according to claim 1 is characterized in that: The downward inclination angle is 10°-12°.

4. The auxiliary ice breaking device based on the gravity flow method according to claim 3 is characterized in that: The downward tilt angle is 10°.

5. The auxiliary ice breaking device based on the gravity flow method according to claim 1 is characterized in that: The diameter of the air outlet hole is 1-2 mm.

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