Shaft-less propeller

Shaftless propulsion technology cancels the traditional propulsion shaft, integrates the propulsion motor with the propeller, the motor is in contact with the water, the heat dissipation effect is good, and the inner cavity space of the submarine is effectively saved, which can be widely used in surface and underwater power propulsion systems. It has the characteristics of low noise, light weight, high energy conversion rate and safety. At present, shaftless propulsion systems are basically used for ship propulsion, but the characteristics of shaftless propulsion technology also have a large space in the field of industrial equipment. It is particularly suitable for the technical expansion and extension of marine equipment involving military-civilian integration projects.

The company's main research and development to shaftless thrusters, high-volume batteries as the core, combined with modern communication technology and Internet of Things technology, through shaftless propulsion technology to expand product extension, participate in the development of multi-model underwater thruster products. Use a national key laboratory to continue to gain cutting-edge technology advantages, give full play to the research and development efficiency of the military-civilian integration model, and provide customers with high-priced and efficient services. The product technology is higher than similar products but the price is the same or lower than similar products. At present, the development of applicable products in the field of emergency is taken as the starting point.

 

Current Equipment Problems

Safety, insufficient reliability

► The operation of the outboard engine is easy to cause accidents.

► The blades of the outboard motor are easy to hit foreign bodies in the water, causing engine damage.

► The outboard motor is entangled by foreign matter in the water

► The blade is exposed to the outside, which is a hidden danger to the person overboard.

► The rescue environment is complex, and the outboard aircraft is not reliable enough to face complex waters.

► The exposed propeller will cause fatal damage to the passing creatures during the high-speed rotation at the bottom of the water, and at the same time there is a great hidden danger to the people who fall into the water or fall into the water. The underwater environment is complicated. When the propeller is running, it is easy to encounter hard foreign objects in the water, which will cause damage to the oars and engines. The exposed oars may also encounter soft fishing nets, ropes and plastic bags, thus being entangled.

Insufficient mobility

Commonly used outboard aircraft, 15P, a weight has reached more than 36KG, and the shape is not suitable for transportation and handling.

 

Advantages of shaftless pump push

First, high mechanical efficiency. The traditional shaft propeller needs spindle transmission and speed change in the process of propulsion, and its mechanical efficiency is generally about 50%, and the higher one is 70%, and the thermal efficiency is even lower. The initial mechanical efficiency of shaftless pump can be close to 80% due to the direct use of electric motor and no transmission module, and with the research of superconductors in China, the mechanical efficiency will only be higher and higher.

Second, the navigation noise is small. The shaftless pump can only use the electric motor as the power, so compared with the traditional diesel engine and mechanical structure, its own natural oscillation frequency and mechanical contact noise are very small. The same motor-driven pump push system, shaftless pump push because there is no drive shaft noise is very small. In contrast, the inevitable mechanical wear and coupling oscillation of the drive shaft pushed by the shaft pump will produce considerable noise during the rotation and output power. This noise is difficult to eliminate by silencer tiles.

Third, it takes up little space. The essence of the shaft pump is to use the transmission system to output power, which occupies a considerable part of the space from the energy section to the middle of the output end. In particular, the watertight problem between the motor/engine-drive shaft-propeller is a major problem in the shipbuilding industry. When the shaftless pump is in use, because the engine is located in the pump casing, its power source only needs a steady stream of electricity, and the sealing effect is good, so there is no need to worry about the watertight system.

 

Advantages of shaftless pump push intelligent rescue boat

1. Because there is no shaft, there is no situation that the propeller is wound by foreign objects, which effectively ensures the reliability of the propeller.

2. The draft is much shallower than that of a propeller with a shaft, which effectively avoids accidents caused by collision between the propeller and hard objects at the bottom of the water.

3, blade and motor integration, embedded in the pump shell, effectively avoid the blade and foreign body in the water contact, protect the blade, but also protect the safety of water personnel and water organisms.

4, strong mobility, can be quickly deployed. Compared with the traditional outboard motor, the propeller is light in weight, easy to disassemble and assemble, and can be carried separately in a backpack to improve the efficiency of action. The power source is a lithium battery, which can be carried in a backpack.

5. Modular design, remote control, automatic cruise, can replace manual unmanned task execution in dangerous areas.

 

Function description of shaftless pump push intelligent rescue boat

Precision rescue: with professional water emergency rescue function, remote control command to achieve precise control of lifeboats to the side of the drowning personnel, the basic realization of zero-distance precision rescue;

Fast rescue: with the ability to quickly put in, the rescue speed is fast, to achieve the purpose of rapid rescue;

Intelligent rescue: with intelligent function, with satellite positioning, intelligent return and course correction function;

Safe rescue: it has the performance of protecting the personal safety of drowning personnel and rescue personnel, and the construction of secondary injuries and secondary accidents of rescue points;

Strong load capacity: it can carry 500KG, can remotely transport a large number of necessary materials and rescue many people at the same time;

Modular: rich interface, can be configured with multi-function modules, video, remote shouting, sonar, thermal imaging, etc., can realize unmanned water search and rescue.

 

Specific parameters of shaftless pump push intelligent rescue boat

1. This product adopts a new type of shaftless pump push system, the overall design presents a streamlined body, fast speed, stable center of gravity, in line with the optimal fluid mechanics body design.

2. There is no need for blade pitch speed regulation, and the intelligent control module adopted has stepless speed regulation function; more importantly, the person falling into the water will not be injured by the blade. At the same time has a good mute effect; improve the safety of use in dangerous waters;

3. Compared with the oil-powered outboard motor, the shaftless propulsion motor is convenient to assemble and disassemble, and the modular design has improved maintainability and reliability. There is no problem of mechanical oil pollution diffusion.

4. The product adopts shaftless propulsion technology, cancels the traditional propulsion shaft, integrates the propulsion motor and the propeller, the motor is in contact with water, and the heat dissipation effect is good, which greatly improves the reliability. At the same time, it effectively saves the inner cavity space of the power device and gets rid of the traditional power The shortcomings of large and heavy equipment make the portable performance of the hull and power equipment improved and rapid deployment realized.

5. The use of shaftless system effectively avoids the possibility of failure caused by the winding of the traditional engine power shaft, and avoids potential safety hazards;

6. The power system adopts mounted design, the hull, power device and power supply system are detachable, easy to install and portable to use.

7. The battery pack adopts 50AH and 100AH(3C) battery cells, and the metal shell is reinforced and equipped with foldable transportation handle and battery power and voltage display screen. It is convenient to disassemble, the battery charging and discharging ports are separated, and the battery and control system adopt quick anti-reverse plug connectors.

8. Equipping with electric air pump, it can quickly inflate the assault boat on site.

9. The shaftless electric push has the ability to travel fast in wind and waves. The speed of the 6-person boat reaches 5.5 meters per second, and it can reach the designated place quickly and accurately. The remote control distance is greater than 1500 meters, ensuring complete control within the sight distance.

10. The remote control has a locking function to prevent misoperation and has a low-power alarm function. The remote control key function definition and control parameter modification can be realized through the mobile phone APP. (Later reservation: anti-shake camera, one-button return, dishonest return, automatic obstacle avoidance, electronic fence cruise, track recording, steering gear control and battery voltage, steering degree, throttle size, remaining power, signal strength, working mode, real-time display setting of working parameters, etc.)

11. The lifeboat body has multiple protection functions of battery and circuit, overcharge, overdischarge, overcurrent, low-power automatic alarm, real-time voltage display and other functions. It can be equipped with GPS and Beidou positioning and navigation, and has real-time, accurate positioning and other functions. Ensure that the equipment is always in good working condition.

12. The hull is made of imported PVC composite materials. Military quality, 1.2mm thick mesh leather material; Anti-collision, wear-resistant and durable, resistant to salt and alkali and sunlight; Riding the wind and waves, V-shaped bottom, keel air chamber; External dimensions, 360CM × 170CM, internal dimensions 240CM × 80CM; Airbag diameter: 45CM, number of air chambers: 31; After modular decomposition, the maximum component weight is 25KG and power: 7.5 kw-18kw (different power can be replaced according to the environment and operation requirements); Maximum load: 800KG; Maximum load: 6 people 2.