| 摘要 |
<p>A variable-displacement hydraulic pump (10) has a pivotable swashplate (19) the position of which (19) is set by a 2-stage electrohydraulic servovalve (11) and serropistons (22, 24), and a mechanical feedback connection is provided between the swashplate (18) and the output stage of the servovalve (11) by means of a lever (96) and an arm (103) coupled to the follow-up sleeve (55) of the output stage. As an alternative, the first stage of the servovalve may control the sleeve and the spool may be coupled to the arm. <IMAGE></p> |
