Novel ship trailing vortex control and unit cooling system and operation method

Abstract

The invention discloses a novel ship trailing vortex control and unit cooling system in the technical field of ship engineering, which comprises a water inlet flow channel arranged on a ship deck, the water inlet flow channel is connected with a propulsion pump, the propulsion pump comprises an impeller and a guide vane, the rear end of the propulsion pump is connected with a nozzle, a driving motor is arranged on the ship deck, and a motor rotating shaft of the driving motor is connected with a pump shaft. The pump shaft is in transmission connection with the impeller, a water guide cone is arranged in the nozzle, a round hole is formed in the cone tip of the water guide cone, a first wireless electromagnetic valve is arranged in the round hole, the first wireless electromagnetic valve is connected with pressure sensor cores arranged up and down and controlled by the pressure sensor cores, a bionic flexible cavity is formed in the water guide cone, one end of the bionic flexible cavity is connected with the round hole, and the other end of the bionic flexible cavity is connected with a cooling water pipe. And a wireless electromagnetic valve II is arranged at the joint of the bionic flexible cavity and the cooling water pipe. By optimizing trailing vortex flow control and improving the cooling efficiency and the service life of the motor, the effects of saving energy and reducing consumption are achieved while the propelling efficiency is improved, and efficient and stable operation of a ship propelling system is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of ship engineering, and in particular to a novel ship wake vortex control and unit cooling system and an operation method. Background Art

[0002] In recent years, with the accelerated development of economic globalization, the contradiction between the rapidly developing international economic trade and the increasingly tense global energy has become more prominent. Therefore, high-performance green ship technology with high efficiency and stability as the main design goals has become a new direction for the development of world ships. At present, propeller propulsion and water jet propulsion are the main methods of ship propulsion. The propeller propulsion system is widely used in various types of ships because of its mature technology and stable operation, while water jet propulsion generates thrust by spraying water through a water pump. Due to its high efficiency and maneuverability advantages, it is widely used in the field of military and civilian high-speed and high-performance ships.

[0003] The key components of the propeller propulsion system include the propeller, shaft system and drive motor. The design of the propeller is crucial to the propulsion efficiency, while the design of the shaft system and motor affects the stability and reliability of the entire propulsion system. The key components of the water jet propulsion system include the water inlet flow channel, propulsion pump and steering reverse mechanism. The water cone guides the water flow in the water jet propulsion device to form a concentrated high-speed jet, thereby improving the propulsion efficiency.

[0004] In the propeller propulsion system, the hub vortex is a common hydraulic instability problem during the navigation of the ship. The hub vortex of the propeller-propelled ship occurs in the low-pressure area formed at the root of the propeller. It is caused by the interaction between the high pressure of the surrounding water flow and the low pressure in this area. Similarly, the waterjet propulsion system also faces the problem of hub vortex, which occurs in the negative pressure area at the tail of the water cone of the waterjet propulsion nozzle. Whether it is a propeller-propelled ship or a waterjet-propelled ship, the hub vortex occurs and develops at the tail of the ship. It is the main component of the ship's tail vortex. Its occurrence and development not only affects the working efficiency of the propulsion system, but also has an adverse effect on the stability of the propulsion system.

[0005] In addition, whether it is water jet propulsion or propeller propulsion, the drive motor runs for a long time in the closed environment inside the ship, which easily causes the motor to overheat and shortens its service life. Although traditional motor cooling methods can provide a certain degree of cooling effect, it is often difficult to achieve efficient heat exchange, resulting in uneven motor cooling, which may damage the performance and service life of the motor. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects in the prior art and provide a new type of ship wake vortex control and unit cooling system and operation method, which optimizes the wake vortex flow control and improves the cooling efficiency and service life of the motor through the water flow power system, thereby improving the propulsion efficiency and achieving the effect of energy saving and consumption reduction, and ensuring the efficient and stable operation of the ship propulsion system.

[0007] The object of the present invention is achieved as follows: a new type of ship wake vortex control and unit cooling system, including a water inlet flow channel arranged on a ship deck, the water inlet flow channel is connected to a propulsion pump, the propulsion pump includes an impeller and a guide vane, a nozzle is connected to the rear end of the propulsion pump, a drive motor is arranged on the ship deck, the motor shaft of the drive motor is connected to a pump shaft, the pump shaft extends to the inside of the propulsion pump and is connected to the impeller in a transmission manner, a water guide cone is also arranged in the nozzle, a circular hole is opened at the tip of the water guide cone, a wireless electromagnetic valve 1 is arranged in the circular hole, the wireless electromagnetic valve 1 is connected to a pressure sensor core body symmetrically arranged up and down and is controlled by the pressure sensor core body, a bionic flexible cavity is arranged inside the water guide cone, one end of the bionic flexible cavity is connected to the circular hole, and the other end is connected to a cooling water pipe, and a wireless electromagnetic valve 2 is also arranged at the junction of the bionic flexible cavity and the cooling water pipe.

[0008] When the present invention is working, it optimizes the water flow power efficiency at the tip of the water guide cone to reduce the wake vortex loss, and uses cooling water pipes to circulate and cool key components such as bearings and motors of the ship, thereby improving the cooling efficiency and service life of the motor.

[0009] Compared with the prior art, the beneficial effects of the present invention are: by installing a wireless solenoid valve in the low-pressure area formed at the tip of the water guide cone, the water flow is accurately controlled. The water flows through the wake vortex generation area, breaks the original water body structure, reduces the generation of wake vortex, reduces the vibration and noise of the ship, improves the navigation stability of the ship, and cools the key components of the ship such as bearings and motors through cooling water pipes, which not only improves the cooling efficiency, but also helps to extend the service life of these components, thereby achieving energy saving and consumption reduction.

[0010] Furthermore, the interior of the water guide cone is hollow, and the shell thickness of the water guide cone is 1 / 10 to 1 / 20 of the diameter of the bottom of the water guide cone; the thickness of the water guide cone shell is controlled to ensure the reliability and rigidity of the water guide cone structure, and also to prevent the reduction of power efficiency and increase of manufacturing cost due to excessive wall thickness.

[0011] Furthermore, a shaft sealing device is provided at the junction of the water inlet channel and the pump shaft, the pump shaft is connected to the motor shaft through a coupling, the pump shaft and the motor shaft are made of stainless steel, and the diameter ratio of the pump shaft to the motor shaft is controlled to be 0.5~0.9 respectively; the pump shaft and the motor shaft are hollow shafts made of stainless steel, and have strength and rigidity. The diameter ratio of the pump shaft to the motor shaft is calculated by the ratio of the inner diameter to the outer diameter of the pump shaft and the ratio of the inner diameter to the outer diameter of the motor shaft respectively. Controlling the diameter ratio of the pump shaft to the motor shaft can ensure strength and rigidity while avoiding the influence of excessive thickness of the pipe shaft on cooling efficiency and reducing manufacturing costs.

[0012] Furthermore, the cooling water pipe is arranged in the hollow tube of the pump shaft and the motor shaft, and passes through the driving motor and is connected to the ship deck through a connecting flange that is fastened with bolts and sealed with a gasket. The outlet of the cooling water pipe is connected to the bottom of the ship. The cooling water pipe is made of stainless steel, and the ratio of the outer diameter to the wall thickness of the cooling water pipe is less than 80 to ensure the corrosion resistance and sufficient structural strength of the cooling water pipe; there is a gap between the outer wall of the cooling water pipe and the inner wall of the pump shaft and the motor shaft, and the size of the gap is not less than 1 / 10~1 / 8 of the diameter of the cooling water pipe, so that the friction between the cooling water pipe and the pump shaft and the motor shaft can be reduced, thereby ensuring the safe operation of the cooling pipeline.

[0013] Furthermore, the bionic flexible cavity is made of flexible materials such as silicone, and the flexible material is not easily damaged when the bionic flexible cavity is repeatedly contracted, expanded and deformed, thereby extending the service life.

[0014] A novel operation method of a ship wake vortex control and unit cooling system, comprising: in an initial state, a bionic flexible cavity is in a contracted state, a cavity is in a vacuum state, and both a wireless electromagnetic valve 1 and a wireless electromagnetic valve 2 are closed; when a water jet propulsion device propels a ship to sail, a wake vortex is easily generated behind a water guide cone, and before the formation of the wake vortex, a significant low-pressure area is formed around the tip of the water guide cone; at this time, a pressure sensor core captures a negative pressure signal, controls the wireless electromagnetic valve 1 to open, and the high-pressure water behind the water guide cone continuously enters the low-pressure area at the tip of the cone, and enters the bionic flexible cavity through the wireless electromagnetic valve, the interior of the bionic flexible cavity begins to slowly expand due to water inflow, and when the negative pressure area at the tip of the water guide cone disappears, the wireless electromagnetic valve 1 is closed, and at this time the bionic flexible cavity is in an expanded and deformed state; After the wireless solenoid valve 1 is completely closed, the wireless solenoid valve 2 is opened. The bionic flexible cavity is compressed by the material and begins to press the water in the cavity into the cooling water pipe through the wireless solenoid valve, gradually cooling the shaft sealing device, coupling and drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the structure of a water jet propulsion device on a ship in the prior art.

[0016] Figure 2 Schematic diagram of the low-pressure area around the tip of the water guide cone.

[0017] Figure 3 Schematic diagram of the tail vortex behind the water guide cone.

[0018] Figure 4 It is a structural schematic diagram of a water guide cone in the prior art.

[0019] Figure 5 It is a schematic structural diagram of the water guide cone in the present invention.

[0020] Figure 6 It is a schematic cross-sectional view of the pump shaft in the present invention.

[0021] Figure 7 It is a cross-sectional schematic diagram of the driving motor shaft in the present invention.

[0022] Figure 8 It is a schematic cross-sectional view of the cooling water pipe and its safety distance in the present invention.

[0023] Fig. 9 It is a schematic diagram of the overall device structure of the present invention.

[0024] Among them, 1 is a water inlet channel, 2 is an impeller, 3 is a guide vane, 4 is a water guide cone, 5 is a wireless solenoid valve 1, 6 is a wireless solenoid valve 2, 7 is a pressure sensor core, 8 is a cooling water pipe, 9 is a nozzle, 10 is a driving motor, 11 is a tail vortex, 12 is a low pressure area, 13 is a bionic flexible cavity, 14 is a pump shaft, 15 is a coupling, 16 is a connecting flange, 17 is a ship deck, 18 is a circular hole, 19 is a shaft sealing device, 20 is a water guide cone tip, 21 is a water guide cone bottom, and 22 is a motor shaft. DETAILED DESCRIPTION

[0025] like Figures 1 to 9A novel ship wake vortex control and unit cooling system shown in the figure comprises a water inlet channel 1 arranged on a ship deck 17, the water inlet channel 1 is connected to a propulsion pump, the propulsion pump comprises an impeller 2 and a guide vane 3, a nozzle 9 is connected to the rear end of the propulsion pump, a driving motor 10 is arranged on the ship deck 17, a motor shaft 22 of the driving motor 10 is connected to a pump shaft 14, the pump shaft 14 extends to the inside of the propulsion pump and is connected to the impeller 2 in a transmission manner, a water guide cone 4 is further arranged in the nozzle 9, a circular hole 18 is opened at the tip 20 of the water guide cone, a wireless electromagnetic valve 5 is arranged in the circular hole 18, the wireless electromagnetic valve 5 is connected to a pressure sensor core 7 symmetrically arranged above and below and is controlled by the pressure sensor core 7, and a bionic flexible cavity 1 is arranged inside the water guide cone 4 3. One end of the bionic flexible cavity 13 is connected to the circular hole 18, and the other end is connected to the cooling water pipe 8. A wireless electromagnetic valve 2 6 is also provided at the junction of the bionic flexible cavity 13 and the cooling water pipe 8; the water flow rate entering the bionic flexible cavity 13 through the circular hole 18 is precisely controlled by the wireless electromagnetic valve 1 5, and the pressure sensor core 7 monitors and responds to the pressure at the tip 20 of the water guide cone in real time, so as to accurately control the flow of water; the amount of water in the bionic flexible cavity 13 entering the cooling water pipe 8 is precisely regulated by the wireless electromagnetic valve 2 6, so as to effectively manage the water flow of the cooling system, effectively eliminate the vortex at the tip of the water guide cone, thereby reducing the vibration and noise of the ship and improving the stability of the ship during navigation.

[0026] The water guide cone 4 is hollow inside, and the shell thickness of the water guide cone 4 is 1 / 10 to 1 / 20 of the diameter of the water guide cone bottom 21; the shell thickness of the water guide cone 4 is controlled to ensure the reliability and rigidity of the water guide cone 4 structure, and also to prevent the power efficiency from being reduced and the manufacturing cost from being increased due to excessive wall thickness.

[0027] A shaft seal device 19 is provided at the junction of the water inlet channel 1 and the pump shaft 14. The pump shaft 14 is connected to the motor shaft 22 through a coupling 15. The pump shaft 14 and the motor shaft 22 are made of stainless steel. The pump shaft 14 and the motor shaft 22 are hollow shafts made of stainless steel and have strength and rigidity. The inner diameter of the pump shaft 14 is D bn , the outer diameter is D bw , its diameter ratio R b Defined as D bn / D bw ; The inner diameter of the shaft 22 is D dn , the outer diameter is D dw , its diameter ratio R d Defined as D dn / D dwIn order to ensure the strength and rigidity of the pump shaft 14 and the motor shaft 22, and to avoid the influence of excessive thickness of the pipe shaft on the cooling efficiency and to reduce the manufacturing cost, control R b and R d The range is 0.5~0.9.

[0028] The cooling water pipe 8 is arranged in the hollow tube between the pump shaft 14 and the motor shaft 22, and penetrates the drive motor 10 and is connected to the ship deck 17 by the connecting flange 16 which is fastened by bolts and sealed with a gasket. The outlet of the cooling water pipe 8 is connected to the bottom of the ship. The cooling water pipe 8 is made of stainless steel. The outer diameter of the cooling water pipe 8 is D g With wall thickness T w The relationship between them is: D g / T w <80, to ensure the corrosion resistance and sufficient structural strength of the cooling water pipe 8; there is a gap between the outer wall of the cooling water pipe 8 and the inner wall of the pump shaft 14 and the motor shaft 22, and the size of the gap D an Not less than 1 / 10~1 / 8 of the diameter of cooling water pipe 8, that is D an ≥0.1 D g ,Depend on D g =min{ D bn , D dn}-2 D an It can be deduced that D g ≤min{ D bn , D dn}-0.2 D g By controlling the safe distance between the outer wall of the cooling water pipe 8 and the inner wall of the pump shaft 14 and the motor shaft 22, friction between the cooling water pipe 8 and the pump shaft 14 and the motor shaft 22 is avoided, thereby ensuring the safe operation of the cooling pipeline.

[0029] The bionic flexible cavity 13 is made of flexible materials such as silicone. The flexible material is not easily damaged when the bionic flexible cavity 13 is repeatedly contracted, expanded and deformed, thereby extending the service life.

[0030] A novel operation method of a ship wake vortex control and unit cooling system, in the initial state, the bionic flexible cavity 13 is in a contracted state, the chamber is in a vacuum state, and the wireless solenoid valve 1 5 and the wireless solenoid valve 2 6 are both closed; Figure 2 , 3 As shown, when the water jet propulsion device propels the ship to sail, a wake vortex 11 is easily generated behind the water guide cone 4, and before the formation of the wake vortex 11, a significant low-pressure area 12 will be formed around the tip 20 of the water guide cone; at this time, the pressure sensor core 7 captures the negative pressure signal, controls the wireless electromagnetic valve 15 to open, and the high-pressure water behind the water guide cone 4 will continue to enter the low-pressure area 12 at the tip, and enter the bionic flexible cavity 13 through the wireless electromagnetic valve 15. The inside of the bionic flexible cavity 13 begins to expand slowly due to the inflow of water. When the negative pressure area at the tip 20 of the water guide cone disappears, the wireless electromagnetic valve 15 is closed. At this time, the bionic flexible cavity 13 is in an expanded and deformed state; After the wireless solenoid valve 1 5 is completely closed, the wireless solenoid valve 2 6 is opened. The bionic flexible cavity 13 is compressed by the material and begins to press the water in the cavity into the cooling water pipe 8 through the wireless solenoid valve 2 6. As the water flows in the cooling water pipe 8, it absorbs the heat generated by the coupling 15, the shaft sealing device 19 and the drive motor 10, and cools them in a continuous cycle, thereby improving the thermal efficiency of the cooling system of the unit of the present invention through the heat exchange mechanism.

[0031] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A novel ship wake vortex control and unit cooling system, comprising a water inlet channel arranged on a ship deck, the water inlet channel connected to a propulsion pump, the propulsion pump comprising an impeller and a guide vane, a nozzle connected to the rear end of the propulsion pump, a drive motor is arranged on the ship deck, a motor shaft of the drive motor is connected to a pump shaft, the pump shaft extends to the inside of the propulsion pump and is drivingly connected to the impeller, characterized in that: A water guide cone is also provided in the nozzle, a circular hole is opened at the tip of the water guide cone, a wireless electromagnetic valve 1 is provided in the circular hole, the wireless electromagnetic valve 1 is connected to a pressure sensor core body symmetrically arranged up and down and is controlled by the pressure sensor core body, a bionic flexible cavity is provided inside the water guide cone, one end of the bionic flexible cavity is connected to the circular hole, and the other end is connected to a cooling water pipe, and a wireless electromagnetic valve 2 is also provided at the junction of the bionic flexible cavity and the cooling water pipe.

2. A novel ship wake vortex control and unit cooling system according to claim 1, characterized in that: The water guide cone is hollow inside, and the shell thickness of the water guide cone is 1 / 10 to 1 / 20 of the diameter of the bottom of the water guide cone.

3. A novel ship wake vortex control and unit cooling system according to claim 1, characterized in that: A shaft sealing device is provided at the junction of the water inlet channel and the pump shaft. The pump shaft is connected to the motor shaft through a coupling. The pump shaft and the motor shaft are made of stainless steel. The diameter ratio of the pump shaft to the motor shaft is controlled to be 0.5-0.

9.

4. A novel ship wake vortex control and unit cooling system according to claim 1, characterized in that: The cooling water pipe is arranged in the hollow tube of the pump shaft and the motor shaft, and passes through the drive motor and is connected to the ship deck through a connecting flange that is fastened with bolts and sealed with a gasket. The outlet of the cooling water pipe is connected to the bottom of the ship. The cooling water pipe is made of stainless steel, and the ratio of the outer diameter to the wall thickness of the cooling water pipe is less than 80.

5. A novel ship wake vortex control and unit cooling system according to claim 4, characterized in that: There is a gap between the outer wall of the cooling water pipe and the inner walls of the pump shaft and the motor shaft, and the size of the gap is not less than 1 / 10 to 1 / 8 of the diameter of the cooling water pipe.

6. A novel ship wake vortex control and unit cooling system according to claim 1, characterized in that: The bionic flexible cavity is made of flexible materials such as silica gel.

7. A novel method for operating a ship wake vortex control and unit cooling system according to any one of claims 1 to 6, characterized in that: In the initial state, the bionic flexible cavity is in a contracted state, the cavity is in a vacuum state, and both the wireless solenoid valve 1 and the wireless solenoid valve 2 are closed; when the water jet propulsion device propels the ship to sail, a wake vortex is easily generated behind the water guide cone. Before the formation of the wake vortex, a significant low-pressure area will be formed around the tip of the water guide cone; at this time, the pressure sensor core captures the negative pressure signal and controls the wireless solenoid valve 1 to open. The high-pressure water behind the water guide cone will continue to enter the low-pressure area at the tip of the cone and enter the bionic flexible cavity through the wireless solenoid valve. The inside of the bionic flexible cavity begins to expand slowly due to the inflow of water. When the negative pressure area at the tip of the water guide cone disappears, the wireless solenoid valve 1 is closed. At this time, the bionic flexible cavity is in an expanded and deformed state. After the wireless solenoid valve 1 is completely closed, the wireless solenoid valve 2 is opened. The bionic flexible cavity is compressed by the material and begins to press the water in the cavity into the cooling water pipe through the wireless solenoid valve, gradually cooling the shaft sealing device, coupling and drive motor.

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