1. What is Resultant Reaction on Bearing 3?

The Resultant Reaction on Bearing 3 of a centre crankshaft at the angle of maximum torque represents the total reaction force acting on the third bearing. It combines both vertical and horizontal reaction components resulting from flywheel weight and belt tension forces.

2. How Does the Calculator Work?

The calculator uses the vector magnitude formula:

Where:

• \( R3 \) — Resultant reaction force on bearing 3 (Newton)
• \( R'3v \) — Vertical reaction component due to flywheel (Newton)
• \( R'3h \) — Horizontal reaction component due to belt tension (Newton)

Explanation: This formula calculates the magnitude of the resultant force vector by combining the orthogonal vertical and horizontal reaction components using the Pythagorean theorem.

3. Importance of Resultant Reaction Calculation

Details: Accurate calculation of resultant bearing reactions is crucial for proper crankshaft design, bearing selection, and ensuring structural integrity under maximum torque conditions. It helps prevent bearing failure and ensures optimal engine performance.

4. Using the Calculator

Tips: Enter both vertical and horizontal reaction values in Newtons. Ensure values are non-negative and represent the actual reaction forces at the specific angle of maximum torque.

5. Frequently Asked Questions (FAQ)

Q1: Why is the angle of maximum torque significant?
A: The angle of maximum torque represents the crankshaft position where the combined forces create the highest stress on bearings, making this calculation critical for design safety.

Q2: What factors influence the vertical reaction component?
A: The vertical reaction is primarily influenced by flywheel weight, crankshaft geometry, and gravitational forces acting on the system components.

Q3: What affects the horizontal reaction component?
A: The horizontal reaction is mainly determined by belt tensions, pulley arrangements, and the mechanical advantage provided by the belt drive system.

Q4: How accurate is this calculation method?
A: This vector magnitude calculation provides precise results for the resultant force magnitude, though actual bearing performance may require additional factors like dynamic loading and thermal effects.

Q5: When should this calculation be performed?
A: This calculation is essential during crankshaft design phase, bearing selection process, and when analyzing engine performance under maximum load conditions.