Design of Bush Pin Type Coupling - Numerical Part 02 - Design of Shaft, Keys & Couplings

TL;DR

In this video, the speaker evaluates the safety of a pushpin type flexible coupling based on various parameters such as stress-induced in different parts, key selection, hub torsion failure, bolt failure, flange shear failure, and pin bearing safety.

Transcript

click the bell icon to get latest videos from akira hello friends welcome back the subject of machine design wa we are right now working on a design new miracle of Bush pin type coupling which is also a flexible coupling in the last last session we have figured out some of the dimensions we have found out D talk to be transmitted and then we select... Read More

Key Insights

• 📌 The safety of a pushpin type flexible coupling is determined by evaluating stress-induced in various components such as the shaft, key, hub, bolts, flange, and pin.
• 😍 Standard formulas and calculations are used to assess the safety of each component, considering factors such as shear stress, crushing stress, torsion stress, and bearing force.
• 🤩 The selection of the key involves evaluating two failure modes, shear and crushing, and selecting the larger value for key length.
• 🦺 The safety of the hub is assessed by comparing the induced torsion stress with the allowable value.
• ⚾ Bolt safety is evaluated based on shear stress and bending stress calculations, comparing the calculated values with the allowable values.
• 🦺 The flange safety is determined by assessing the shear failure due to force, comparing the induced shear stress with the allowable value.
• 🧷 The safety of the pin is evaluated by comparing the induced bearing force with the allowable value.

Questions & Answers

Q: How is the safety of the shaft determined in the coupling design?

The shear stress in the shaft is calculated using the formula pi/16 * Tau * (shaft diameter). By comparing the calculated value with the allowable value, the safety of the shaft can be determined.

Q: How is the key selected for the coupling?

The key selection involves evaluating two failure modes, shear and crushing. The length of the key is determined by comparing the calculated values for both failure modes and selecting the larger value.

Q: What is considered for the safety of the hub in the coupling design?

The safety of the hub is determined by calculating the induced torsion stress using the formula (outer diameter - inner diameter) / (outer diameter) * Tau. By comparing the calculated value with the allowable value, the safety of the hub can be determined.

Q: How is the safety of the bolts assessed in the coupling design?

The safety of the bolts is evaluated based on two failure modes, shear and bending stress. Formulas are used to calculate the total force on the bolts and the maximum moment. By comparing the calculated values with the allowable values, the safety of the bolts can be determined.

Summary & Key Takeaways

• The video discusses the evaluation of a pushpin type flexible coupling's safety in machine design.

• The speaker analyzes stress-induced in different parts, including the shaft, key, hub, bolts, flange, and pin.

• Various calculations and formulas are used to determine the safety of each component, ensuring a reliable coupling selection.