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Hydraulic Pump Shaft Torque Formula:
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Hydraulic pump shaft torque is the rotational force required to drive a hydraulic pump at a specific speed and power output. It's a critical parameter in hydraulic system design and component selection.
The calculator uses the hydraulic torque formula:
Where:
Explanation: The formula calculates the torque required at the pump shaft based on the power input and rotational speed, using the standard conversion factor for SI units.
Details: Accurate torque calculation is essential for proper motor selection, shaft design, coupling specification, and overall system efficiency in hydraulic applications.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from the conversion between different units: 60,000/(2π) ≈ 9550, where 60,000 converts minutes to seconds and watts to kilowatts, and 2π converts radians to revolutions.
Q2: What are typical torque values for hydraulic pumps?
A: Torque values vary widely based on pump size and application, ranging from a few Nm for small pumps to thousands of Nm for large industrial pumps.
Q3: How does efficiency affect torque calculation?
A: This formula calculates theoretical torque. Actual torque may be higher due to mechanical losses, volumetric efficiency, and other factors in real-world applications.
Q4: Can this formula be used for hydraulic motors?
A: Yes, the same formula applies to hydraulic motors, where torque represents the output rather than input requirement.
Q5: What if I have power in horsepower instead of kilowatts?
A: Convert horsepower to kilowatts first (1 HP ≈ 0.7457 kW) before using this calculator for accurate results.