Danfoss Series 90 Technical Information

Also see for Series 90: Installation Service manual

Contents

Danfoss Series 90 Technical Information Manual pdf 43 page image

Displacement limiter locationPump rotation Displacement limiter mounted onservo sideDisplacement limitation at highpressure sideRight [CW] 1 A2 BLeft [CCW] 1 B2 ADisplacement limiterP108 705ESide 1 Side 2Frame size Lock nut wrench size and torque Adjusting screwwrench sizeinternal hexApproximate displacement changeper revolution of adjusting screw042 13 mm 24 N•m [18 lbf•ft] 4 mm 3.5 cm³/(rev) [0.21 in³/rev]055 13 mm 24 N•m [18 lbf•ft] 4 mm 4.2 cm³/rev [0.26 in³/rev]075 13 mm 24 N•m [18 lbf•ft] 4 mm 5.1 cm³/rev [0.31 in³/rev]100 13 mm 24 N•m [18 lbf•ft] 4 mm 6.2 cm³/rev [0.38 in³/rev]130 17 mm 48 N•m [35 lbf•ft] 5 mm 8.8 cm³/rev [0.53 in³/rev]180 19 mm 125 N•m [92 lbf•ft] 6 mm 12.5 cm³/rev [0.76 in³/rev]250 19 mm 125 N•m [92 lbf•ft] 6 mm 17.3 cm³/rev [1.06 in³/rev]The servo cylinders are equipped with gage port X11 and X12. These ports provide the possibility toconnect the servo system of the pump to the system loop. This feature connects the high pressure lineswith the servo system over check valves and provides a smooth concrete flow.Shaft TorqueShaft torque and spline lubricationThe rated torque is a measure of tooth wear and is the torque level at which a normal spline life of 2x109shaft revolutions can be expected. The rated torque presumes a regularly maintained minimum level oflubrication via a moly-disulfide grease in order to reduce the coefficient of friction and to restrict thepresence of oxygen at the spline interface. It is also assumed that the mating spline has a minimumhardness of Rc 55 and full spline depth. The rated torque is proportional to the minimum active splinelength.Maximum torque ratings are based on torsional fatigue strength considering 100.000 full load reversingcycles. However, a spline running in oil-flooded environment provides superior oxygen restriction inaddition to contaminant flushing. The rated torque of a flooded spline can increase to that of theTechnical Information Series 90 Axial Piston PumpsFeatures and Options520L0603 • Rev 0804 • March 2016 43