dtdynamics
Mechanical
Hi
im designing parts for a motorcycle which is a rotating horizontal valve near the exhaust port on a two stroke motor.
the valve weights about 150 grams and is coupled to another valve in a cylinder parallel to it.
a servo motor cycles it between about 0 and 90 deg at about 3 rad/s.
the bushings are supporting both ends of the valve which has a lenght of about 120mm and has a bearing surface of 10mm each side.
the valves are made from high silicon casting aluminium 4xx series i believe.
im wondering if anyone has any suggestions as to whether sae 660 high leaded tin bronze or phosphor bronze would be best or how i could even calculate stress'es or wear on each type?
im designing parts for a motorcycle which is a rotating horizontal valve near the exhaust port on a two stroke motor.
the valve weights about 150 grams and is coupled to another valve in a cylinder parallel to it.
a servo motor cycles it between about 0 and 90 deg at about 3 rad/s.
the bushings are supporting both ends of the valve which has a lenght of about 120mm and has a bearing surface of 10mm each side.
the valves are made from high silicon casting aluminium 4xx series i believe.
im wondering if anyone has any suggestions as to whether sae 660 high leaded tin bronze or phosphor bronze would be best or how i could even calculate stress'es or wear on each type?