Entering Shafts
The following table describes the part parameters required for shaft.
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Parameter
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Type
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Description
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|---|---|---|---|---|
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Base Failure Rate
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Real (Failures/Million Cycles). Used in Lambda b calculation.
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The base or manufacturer-supplied failure rate entered is used to determine a calculated failure rate. The failure rate is calculated given from the equation Lambda b = 1E6 / N where N is the number of cycles to failure at the material endurance limit.
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Tensile Strength
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Real (kpsi). Used in Cf calculation.
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The tensile strength of the shaft material. For more information, see Tensile Strength Values for Shafts.
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Filter Size
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Real (microns). Used in Ccp calculation.
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The system filter size in microns.
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Flow Rate - Actual
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Real (Gallons/Minute). Used in Ctlf calculation.
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The actual flow in gallons/minute.
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Max Specified Flow
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Real (Gallons/Minute). Used in Ctlf calculation.
|
The maximum pump specification flow in gallons/minute.
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Finish
|
Choice List. Used in Cf calculation.
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The appropriate type of surface finish. Choices include Polished, Ground, and more.
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Casing Type
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Choice List. Used in Ctlf calculation.
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The correct pump casing type. Choices are:
• Ordinary Volute
• Modified Concentric
• Double Volute
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Unbalanced Force
|
Real (lb). Used in Cdy calculation.
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The force created from an unequal distribution of forces on the pump shaft from varying fluid pressures.
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Modulus of Elasticity
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Real (psi). Used in Cdy calculation.
|
The modulus of elasticity in psi.
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Moment of Inertia N
|
Real (in). Used in Cdy calculation.
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For area N, the moment of inertia in inches.
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Moment of Inertia M
|
Real (in). Used in Cdy calculation.
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For area M, the moment of inertia in inches.
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Moment of Inertia L
|
Real (in). Used in Cdy calculation.
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For area L, the moment of inertia in inches.
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Moment of Inertia X
|
Real (in). Used in Cdy calculation.
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For area X, the moment of inertia in inches.
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N
|
Real (in). Used in Cdy calculation.
|
An area used in measuring shaft deflection.
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M
|
Real (in). Used in Cdy calculation.
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An area used in measuring shaft deflection.
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L
|
Real (in). Used in Cdy calculation.
|
An area used in measuring shaft deflection.
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X
|
Real (in). Used in Cdy calculation.
|
An area used in measuring shaft deflection.
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Temperature Rise
|
Real (Degrees C). Used in Ct calculation.
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The temperature rise from the ambient subassembly temperature to this component. The temperature rise plus the ambient temperature is equal to the operating temperature of the device.
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Cycles/Hour
|
Real
|
The number of cycles/hour. This is required to convert failure ratings from failures/cycle to failures/hour.
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[Derating Parameters]
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For more information, see Derating Parameters.
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