- #1
paulwh
- 2
- 0
hi there,
i need some advice please.
I am a farmer that wants to press some oil seed rape. i have a tractor that produces 80 kw of power at its pto shaft (Power take off) and i want to use this rotational power to produce a reciprocating motion eg back and forth motion. The pto shaft has two speeds approx 500rpm and 1000rpm
I have attatched a picture to try and show what i am trying to achieve.
What i would like to know is how i go about calculating the pressure at the piston.
I have spent many hours trawling the net trying to find the answers and calculations but as yet havent.
I am using the principle of first class levers.
I know pressure is force divided by area (approx 4" diameter piston). And force is mass x acceleration. (what mass should i be using? what in this context is acceleration?)
But how do i get 80kw of rotation to convert to a given pressure in the cylinder.
as yet i don't know the ideal pressure figure i require to press the oil but i want to try different lever lengths to give me different pressures. and knowing how to calculate it would be ideal.
Thank you for taking the time to read this and hopefully someone will be able to help
Paulwh
i need some advice please.
I am a farmer that wants to press some oil seed rape. i have a tractor that produces 80 kw of power at its pto shaft (Power take off) and i want to use this rotational power to produce a reciprocating motion eg back and forth motion. The pto shaft has two speeds approx 500rpm and 1000rpm
I have attatched a picture to try and show what i am trying to achieve.
What i would like to know is how i go about calculating the pressure at the piston.
I have spent many hours trawling the net trying to find the answers and calculations but as yet havent.
I am using the principle of first class levers.
I know pressure is force divided by area (approx 4" diameter piston). And force is mass x acceleration. (what mass should i be using? what in this context is acceleration?)
But how do i get 80kw of rotation to convert to a given pressure in the cylinder.
as yet i don't know the ideal pressure figure i require to press the oil but i want to try different lever lengths to give me different pressures. and knowing how to calculate it would be ideal.
Thank you for taking the time to read this and hopefully someone will be able to help
Paulwh