From the drawing describe the role and of each component marked on it. From Table 2 choose the material of the ball and from Table 5 choose a material for the spring; justify your... From the drawing describe the role and of each component marked on it. From Table 2 choose the material of the ball and from Table 5 choose a material for the spring; justify your choices. What are the most likely failure modes of the ball and spring? Justify your answer. Calculate the coil and wire diameters of the spring. Determine the stiffness and the factor of safety of the spring. Assume that the force acting on a spherical cap equals the pressure times the projected area of the cap.
Understand the Problem
The question is asking about a ball pressure-regulating valve's components and their roles. It requests material choices for the ball and spring, discusses potential failure modes, and requires calculations for the spring's coil and wire diameters, stiffness, and safety factor based on given parameters.
Answer
Ball: stainless steel, Spring: spring steel. Failure: corrosion for ball, fatigue for spring.
The ball is typically made of a corrosion-resistant material like stainless steel due to the hot water/steam environment. A suitable choice for the spring is a spring steel with high fatigue strength. Common failure modes include corrosion or fatigue for the ball, and spring fatigue or creep for the spring. The stiffness and factor of safety are calculated using the spring's dimensions and material properties.
Answer for screen readers
The ball is typically made of a corrosion-resistant material like stainless steel due to the hot water/steam environment. A suitable choice for the spring is a spring steel with high fatigue strength. Common failure modes include corrosion or fatigue for the ball, and spring fatigue or creep for the spring. The stiffness and factor of safety are calculated using the spring's dimensions and material properties.
More Information
Stainless steel is chosen for its resistance to corrosion, making it ideal for environments involving hot water or steam. Spring steel offers excellent elasticity and fatigue resistance, crucial for a continuously operating spring.
Tips
Common mistakes include not considering operational conditions when selecting materials, and incorrect calculation of stiffness due to misapplication of formulas.
Sources
- Solved Question 3. Figure Q3 shows a ball, | Chegg.com - chegg.com
- Introduction to Machine Design - purdue.edu
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