Velocity required between two connecting shafts

[rexxii]

Homework Statement

Velocity between two connecting shafts

Relevant Equations

not required.

Summary: Constant Velocity between two connecting shafts?
Many mechanical machines have a requirement for two shafts to be joined. Explain the requirements for constant velocity ratio between the two shafts?

I think this is to do with the requirement for continual acceleration and direction. if the two shafts are moving at a constant speed, but it the direction will be constantly changing therefore the velocity will be changing?

To ensure the system is producing energy from work completing by the mechanical system a constant velocity ration is required? is this along the right lines?

 

[rexxii]

Many mechanical mechanisms require two shafts to be joined with a constant velocity ratio to allow transmission of power through a variable angle without a considerable increase in friction. Regardless of the turning angle, the speed will remain constant however velocity will change, and this will help the mechanism to apply power in lateral and horizontal angles. A constant velocity ratio is required to ensure power is transmitted through the mechanism and keeps a continual speed. An example of this front wheel drive in a car where the car will continue moving at a constant speed however, the suspension will deal with lateral movement in the suspension and moving horizontally forward.

does the above seem correct?

 

[berkeman]

Is seems like you are on the right track, but I would use examples of the transmission in a car (keep it simple and consider just the manual transmission with clutch and gears), and the differential mechanism where the drive shaft drives the rear (or front) axles...

 

[rexxii]

Hi,

thank you for confirming, unfortunately, i am on a strict word count so need to be concise as possible :(

i know the general terms of it but need it to be as concise

would you go into contextual examples or would the above be concise enough for the report?

 

[berkeman]

Many mechanical mechanisms require two shafts to be joined with a constant velocity ratio to allow transmission of power through a variable angle without a considerable increase in friction. Regardless of the turning angle, the speed will remain constant however velocity will change

Can you say what distinction you are drawing there between speed and velocity? That part is confusing for me. Thanks.

 

[rexxii]

Can you say what distinction you are drawing there between speed and velocity? That part is confusing for me. Thanks.

i need to explain how two connecting shafts need connecting. If there was no connection the power applied to the mechanism would only go one way. Therefore the speed/torque/force is applied to the connected shaft which means that the force can push the force in an opposing direction.

Although the speed of the power transmission will remain the same, the velocity will always change as the angle or direction of the object moving will change