Seeking help to determine cylinder spring
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Given the cylinder diameter, piston rod size, stroke, and air supply pressure, how can one determine the force required of the return spring (of the push-type type)? For example, if the cylinder diameter is 200 MM, the stroke is 100 MM, the piston rod size is 30 MM, and the air supply pressure is 0.5 MPA, how can one determine that the elasticity of the return spring (push-type spring) needs to be high?
You should still need the torque of your valve, along with the amplification factor, in order to calculate it
The torque at the end of spring return is greater than or equal to the initial output torque of the cylinder
1. List a force balance equation. 1.1. The resistance is: air source pressure * effective area of the piston + frictional force on the valve stem * coefficient + pressure difference of the medium acting on the cross-section of the valve core * cross-section of the valve core. 1.2. The driving force is: spring force. 2. The relationship between the spring force and the stroke can be described using Hooke’s law, so that when the spring reaches its maximum stroke (minimum compression), the spring force is still sufficient to overcome the resistance
The cylinder is unloaded, so there is no need to consider valves.