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Width of Crank Web is defined as the width of the crank web (the portion of a crank between the crankpin and the shaft) measured perpendicular to the crankpin longitudinal axis. It is a critical dimension in crankshaft design that affects the structural integrity and load-bearing capacity of the engine.
The calculator uses the formula:
Where:
Explanation: The formula calculates the required width of the crank web based on the applied force, bearing pressure, and crank pin length, with a safety factor of 1.14.
Details: Proper calculation of crank web width is essential for ensuring the crankshaft can withstand the operational forces without failure. It affects the engine's durability, performance, and safety.
Tips: Enter force on crank pin in Newtons, bearing pressure in Pascals, and length of crank pin in meters. All values must be positive and non-zero.
Q1: Why is the 1.14 factor used in the formula?
A: The 1.14 factor is a safety coefficient that accounts for additional stresses and uncertainties in the crankshaft loading conditions.
Q2: What is typical bearing pressure in crank pins?
A: Bearing pressure typically ranges from 5-15 MPa for automotive applications, but varies based on engine type and design specifications.
Q3: How does crank web width affect engine performance?
A: Adequate crank web width ensures proper load distribution and prevents crankshaft failure, while excessive width adds unnecessary weight.
Q4: Can this formula be used for all types of crankshafts?
A: This formula is specifically designed for center crankshafts at TDC position. Other crankshaft configurations may require different calculations.
Q5: What units should be used for input values?
A: Force should be in Newtons (N), pressure in Pascals (Pa), and length in meters (m) for consistent results.