Need Help with Cycloidal Propeller Theory

In summary, the cycloidal propeller is a great choice for craft that need to be able to quickly change direction, avoid mines or pull heavy loads. It has a long life expectancy and is relatively easy to maintain.
  • #1
Harrison S
3
0
Trying to figure out how to model a cycloidal Propeller. Here is the concept I am using. http://www.rexresearch.com/voight/propbew2.gif

When the Socket (left side) is on the axis, the propeller blades to the left or right are at 90 degrees. As long as this socket is on the axis the blades on the axis will be at 90 degrees. What kind of Lever system do i need so that when my version's socket is on the horizontal axis, the blades will be at 90 degrees? Any Ideas? I have attached a partial solidworks Assembly. Also, here is the interactive animation showing one of these working.
http://users.telenet.be/sleepbedrijf/VoithSchneiderPropellerDemoProgramm3%5B1%5D.swf

Here is the link to my solidworks forum thread with my incomplete cad model.

https://forum.solidworks.com/thread/61614?tstart=0
Harrison

*edited
 
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  • #2
Harrison S said:
Trying to figure out how to model a cycloidal Propeller. Here is the concept I am using. http://www.rexresearch.com/voight/propbew2.gif

When the Socket (left side) is on the axis, the propeller blades to the left or right are at 90 degrees. As long as this socket is on the axis the blades on the axis will be at 90 degrees. What kind of Lever system do i need so that when my version's socket is on the horizontal axis, the blades will be at 90 degrees? Any Ideas? I have attached a partial solidworks Assembly. Also, here is the interactive animation showing one of these working.
http://users.telenet.be/sleepbedrijf/VoithSchneiderPropellerDemoProgramm3%5B1%5D.swf

Harrison

Welcome to the PF.

That's a pretty fun interactive animation. :smile: What are the advantages and disadvantages of this type of ship propeller versus a standard screw type?
 
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  • #3
This kind of propeller is used on tugboats, ferry's and was used during world war 2 on mine disposal ships. It allows transference of thrust in any direction in only a few seconds. Ferry's can spin 180 degrees to unload cars quickly, mine disposal ships can avoid mines, tugboats can pull a ship in any direction and can maneuver quickly to avoid collisions. It is also much more durable than most other types of propulsion and has a long life expectancy. This propulsion device also helps with reducing the roll in rough seas.

The disadvantages are that it has a lower maximum speed compared to standard propulsion drives of the same horsepower. This means that it is not as effective for the main propulsion for extremely fast crafts, or freighters. However, the cylcloidal propeller would be great as a second propulsion unit to help with docking or manuevering.
 

1. What is a cycloidal propeller?

A cycloidal propeller is a type of marine propeller that consists of a series of curved blades arranged in a circular pattern around a central hub. The blades rotate in a cycloidal motion, similar to the movement of a paddle wheel, generating thrust and propelling the vessel forward.

2. How does a cycloidal propeller work?

A cycloidal propeller works by using the principle of hydrodynamics to move water in a circular motion and create thrust. The blades rotate in a cycloidal path, pushing the water behind the vessel and propelling it forward. This design allows for greater maneuverability and efficiency compared to traditional propellers.

3. What are the advantages of using a cycloidal propeller?

There are several advantages to using a cycloidal propeller, including increased maneuverability, improved efficiency, and reduced noise and vibration. This type of propeller is also more compact, allowing for better use of space on a vessel. Additionally, cycloidal propellers are less affected by changes in water flow and can operate in shallow waters without risk of damage.

4. How is the performance of a cycloidal propeller measured?

The performance of a cycloidal propeller is typically measured by its thrust and torque characteristics. Thrust is the force generated by the propeller to move the vessel forward, while torque is the rotational force required to turn the propeller. Other factors, such as efficiency, cavitation, and noise levels, can also be used to assess the performance of a cycloidal propeller.

5. What are some applications of cycloidal propellers?

Cycloidal propellers are commonly used in marine vessels, such as tugboats, ferries, and research vessels. They are also used in underwater vehicles, such as remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs). Additionally, cycloidal propellers have been used in hydroelectric power generation, where they harness the power of water currents to generate electricity.

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