| 摘要 |
A line (5) leads from each of the three main pumps (1, 2) and (3) to the control valves (11, 12, 13; 21, 22, 23) and (31, 32, 33) located in series in control blocks (10, 20) and (30). The control blocks each have pressure-relief valves (14, 24) and (34) and lines to a common tank (9) which, for the sake of simplification, is indicated at a plurality of points in the drawing. The pumps (1, 2) and (3) are assigned independent pressure regulators (15, 16) and (17) which are connected via a common line (6) to a measuring pump (4) from which a line (7) leads to the tank (9) via a limit-load regulating valve (8). The pressure regulators (15, 16, 17) influence the individual pumps (1, 2) and (3) in such a way that all have the same pivot angle and the same delivery. <IMAGE>
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