Danfoss Power Solutions Gmbh & Co Ohg

Pistonpower Aps

Peter Krissak

Jorgen Mads Clausen

Peter Zavadinka

Miroslav Chmatil

Jan Jakubovic

Lubos Chmatil

Displacement control device for variably adjusting the displacement of an axial piston hydraulic pump including a rotary shaft rotatable around a shaft axis. A torque can be applied for rotating the rotary shaft to open and close servo pressure lines to adjust the displacement volume of the axial piston hydraulic pump. Concentric to the shaft axis in a mid-portion of the rotary shaft a detent sleeve is positioned having an abutment area onto which, in the neutral position, a sliding element abuts. The detent sleeve, in operating conditions is rotatably fixed with the rotary shaft and turns with the rotary shaft and for neutral position adjustments in non-operating conditions, the detent sleeve and the rotary shaft are detachable from each other such that the rotary shaft can be turned relative and independently within the detent sleeve, which is held in its neutral position by the sliding element.

Manual displacement control arrangement for an axial piston pump

A pressure amplifier () is described comprising a housing () a low pressure chamber (-), a high pressure chamber (-) and for transmitting means between the low pressure chamber (-) and the high pressure chamber (-). Such a pressure amplifier should have a compact design. To this end the force transmitting means comprise a rotor () arranged in a bore () of the housing (), wherein the rotor () comprises a radially extending low pressure wing () and a radially extending high pressure wing (), the low pressure wing () together with the housing () delimiting the low pressure chamber (-) and the high pressure wing () together with the housing () delimiting the high pressure chamber (-), wherein a supply of fluid into the low pressure chamber (-) causes a rotation of the rotor () and a rotation of the rotor causes a decrease of volume of the high pressure chamber (-).

Pressure amplifier

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Zilina, Slovakia

Peter Krissak