Mounting flange loads
Adding tandem mounted auxiliary pumps and/or subjecting pumps to high shock loads may result in
excessive loading of the mounting flange. Applications which experience extreme resonant vibrations or
shock may require additional pump support. The overhung load moment for multiple pump mounting
may be estimated using the formula below:
Overhung load example
Estimating overhung load moments, max. and rated acceleration factors for some typical applications:
Rated load moment Shock load moment
M
R
= g • G
R
(W1L1 + W2L2 + ... + WnLn) N•m [lbf•in] M
S
= g • G
S
(W1L1 + W2L2 + ... + WnLn) N•m [lbf•in]
Variables:
g = Gravity 9.81 m/s²
G
R
= Calculation factor for rated (vibratory) acceleration. This factor depends on the application.
G
S
= Calculation factor for max. shock acceleration. This factor depends on the application.
W = Mass/Weight of pump, kg [lb]
L = Distance from mounting flange to pump center of gravity, m [in] (refer to Installation drawings.)
Allowable overhung load moment values are given for each size specific technical information. Exceeding
these values requires additional pump support.
Typical G loads for various applications
Application Calculation factor
Rated (vibratory) acceleration G
R
Maximum (shock) acceleration G
S
Skid Steer Loader 8 15-20
Trencher (rubber tires) 3 8
Asphalt Paver 2 6
Windrower 2 5
Aerial Lift, Turf Care 1.5 4
Vibratory Roller 6 10
Use these in the absence of specific data for a rough estimation.
Basic Information
H1 Axial Piston Pumps, Single and Tandem
System design parameters
©
Danfoss | April 2017 11062168 | BC00000057en-US0602 | 33
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