Recommendations for good underwater thrusters

I. What are the main applications of thrusters

1. The most original application of thrusters - on the water

The application on the water has actually been there for a long time, we play boat model partners are very clear, the boat is equipped with motor + propeller + ESC + remote control receiver + water cooling set + remote control, you can enjoy the fun of remote control to drive the boat, motor + propeller is a very simple small propeller.

Of course, the real nautical modelers have brushless motors for their thrusters, brushless motors + propellers, which are so violent that they are often seen in nautical modeling events. The construction principle is almost the same as that of the above brush motor, except that the brushless motor has the advantage of long life, high efficiency, low noise, etc. Its propeller pitch is also larger and it runs faster.



In addition to sea models and boats, there are in fact other applications, such as lifebuoy thrusters, which are even more useful in the course of various types of disaster relief.

 

Of course in terms of entertainment more than anything else, thrusters bring joy, thrusters have its shadow in kayaks, paddle boards, swimming equipment and hydrofoils, and are a fun motivation for many DIY modification enthusiasts.

Not long ago the photo of the Facebook founder playing with a hydrofoil went viral on the internet, bringing more attention to hydrofoils, but the real fun of hydrofoils is the fun of DIY and then putting on the power and enjoying the lightness of floating on water.

 

What it looked like when we fitted the hydrofoils to the thrusters.


 

2. Advanced thruster applications ---- shallow water

Underwater thrusters in shallow water are mainly used in ROVs and underwater robots, etc. It would be more intuitive to put the diagram directly.

ROVs are mostly DIY.
 

3. The ultimate thruster application - deep water

The deep water layer of the underwater thruster, diving depth of more than 1000 meters, is mainly used for exploration, the cost is basically a thruster 20,000 starting, its voltage exceeds 300V, the use of hydraulic pressure to balance the water pressure and thus to achieve waterproof, the whole process is a dynamic process.


 

Having talked about the areas of application of the thrusters, let's move on to the formal introduction of underwater thrusters at different waterproofing depths.

Ⅱ. the waterproof depth of 100 metres or less thrusters

Waterproof depth of 100 meters or less is mainly waterproof motor thrusters, not in the motor outside the additional metal shell wrapped, the motor is directly in contact with seawater or fresh water, the biggest characteristic of this type of thruster is small and relatively simple structure.

1.DD underwater thruster DT1.2 with a maximum thrust of 1.2 kg

Reasons: The main ones are the following

A: Integrated mould design: nylon glass fibre composite material is used, with good mechanical properties and corrosion resistance.

B: Fully waterproof process, depth up to 100 metres: the motor is fully potted and fully waterproof to ensure the thruster works stably for a long time underwater.

C: The motor is fitted with high quality precision bearings, which significantly increases the service life of the motor.

D: Matching high-performance fully waterproof bi-directional ESC: PWM: 1500-2000us forward (forward), 1500-1000us backward (backward)

E: reasonable matching of power system, high efficiency: high-strength composite propeller, after several simulation analysis test and motor strict matching, so that the thruster efficiency continues to be optimal.

F: easy to use and install: modular design of the propeller mounting base, to meet the installation requirements of different use scenarios.

 

2.DD maximum thrust 4.8Kg thruster TD4.8

This thruster is one of the better Shenzhen Diamond Power, and is also convenient for many customers to install and fix. Recommended reasons: mainly the following points.

A: High quality all-metal structure, precision machining: the thruster uses aviation aluminium alloy material, precision machined by computer digital control.

B: sealed waterproof process: the motor is completely sealed waterproof process, dustproof, anti-fine sand, anti-corrosion, to ensure that the thruster in the long time underwater stable work.

C: internal injection of coolant, motor cooling more efficient: the power set is filled with motor coolant to ensure that the thruster works underwater efficient cooling, long and stable work.

D: The motor is equipped with high quality precision bearings, making the service life of the motor significantly increased.

E: the power system with reasonable and efficient: high-strength metal propeller, after many simulation analysis test and motor strict matching, so that the thruster efficiency continues to be optimal.

F: Easy to use and install, to meet the installation requirements of different use scenarios.





 

3.DD integrated thrusters TD6E and TD7 with a maximum thrust of 7Kg

These two thrusters, both with a maximum thrust of 7Kg, have their own characteristics and are both equipped with ESCs, but the TD6E is equipped with a short range remote control.

(1) Integrated underwater thruster TD6E

(2) Integrated underwater thruster TD7


 

4: DD maximum thrust 10Kg thruster - TDS10

 

5. DD thruster TD14 with a maximum thrust of 14Kg

 

6. DD maximum thrust 20Kg underwater thruster - TD20

7. DD max thrust 46Kg underwater thruster TD46


 

Ⅲ. the waterproof depth of more than 200 metres of thrusters

General more than 200 meters waterproof depth of the thruster, basically need to brushless motor has a metal shell wrapped, while the inner cavity is filled with oil, the role of oil filling mainly has three: lubrication, cooling, balance the external water pressure.

1.DD maximum thrust 6Kg underwater thruster TDS6

2.DD maximum thrust 7Kg underwater thruster TDS7


 

3.DD maximum thrust 9KG underwater thruster TD9

 

 

 

4.DD max thrust 40KG underwater thruster TD40


 

IV. Waterproof thrusters for depths of more than 1,000 metres

For underwater thrusters with a depth of more than 1000m, they are generally customised according to the customer's own needs and there is no specific model.

The thrusters recommended above are all from the company Diamond Dynamics, just as we all basically recommend DJI in drones, I recommend Diamond Dynamics in the underwater thruster section.