External Radial Shaft Loads; H1P 147/165 Bearing Life - Danfoss H1 Technical Information

Technical Information
H1 Axial Piston Single Pumps, Size 147/165
Technical specifications

External Radial Shaft Loads

H1P 147/165 Bearing Life

© Danfoss | May 2017
Filtration, Cleanliness level and Efficiency β
Cleanliness per ISO 4406
Efficiency β (charge pressure filtration)
x
Efficiency β (suction and return line Filtration)
x
Recommended inlet screen mesh size
The pumps are designed with bearings that can accept some external radial loads. The external radial
shaft load limits are a function of the load position and orientation, and the operating conditions of the
unit. External radial shaft loads impact lifetime. For lifetime calculations please contact your Danfoss
representative.
The maximum allowable radial load (R
distance (L) from the mounting flange to the load. It may be determined using the following formula:
M
e
R =
e
L
Radial load position
M = shaft moment
e
L = flange distance
R
= external force to the shaft
e
Thrust loads should be avoided. Contact your Danfoss representative in the event thrust loads are
anticipated.
Maximum external shaft load based on shaft deflection
External radial moment
M
e
All external shaft loads affect bearing life. In applications with external shaft loads, minimize the impact
by positioning the load at 0° or 180° as shown in the figure.
Danfoss recommends clamp-type couplings for applications with radial shaft loads.
Contact your Danfoss representative for an evaluation of unit bearing life if you have continuously
applied external loads exceeding 25 % of the maximum allowable radial load (R
swashplate is positioned on one side of center all or most of the time.
-ratio ( Recommended Minimum)
x
22/18/13
β = 75 (β
15-20 10
β = 75 (β
35-45 10
100 – 125 µm
) is based on the maximum external moment (M
e
L
R
e
270° R
e
M
e
Unit Size 147
N•m [lbf•in] 140 [1240]
≥ 10)
≥ 2)
) and the
e
0° R
e
90° R
180° R
P003 318E
e
Size 165
140 [1240]
) or the pump
e
11063347 | BC00000061en-US0701 | 7
e