Josh2008
Mechanical
- Sep 25, 2008
- 42
Good Afternoon,
I'm designing a shaft for an oscillating steel gate on a inclined plane (40 deg). The gate is 6 ft wide by 12 ft in length and weights approximately 6500 lbs. The gate oscillates 46 degrees every 115 seconds at a rotational speed less than 5 rpm. It is actuated by two hydraulic cylinders attached to a lever arm at the center of rotation. One cylinder on the top of the gate and one at the bottom. The gate is designed with an upper support roller near the tip as to prevent it from sliding on the steel floor.
With the above mentioned duty cycle, would I design the shaft size using dynamic theory or static theory? I have used dynamic theory with a calculated endurance strength of 18,340 psi. Does a 10" shaft sound too big? The material is 4140.
I'm designing a shaft for an oscillating steel gate on a inclined plane (40 deg). The gate is 6 ft wide by 12 ft in length and weights approximately 6500 lbs. The gate oscillates 46 degrees every 115 seconds at a rotational speed less than 5 rpm. It is actuated by two hydraulic cylinders attached to a lever arm at the center of rotation. One cylinder on the top of the gate and one at the bottom. The gate is designed with an upper support roller near the tip as to prevent it from sliding on the steel floor.
With the above mentioned duty cycle, would I design the shaft size using dynamic theory or static theory? I have used dynamic theory with a calculated endurance strength of 18,340 psi. Does a 10" shaft sound too big? The material is 4140.
