| 摘要 |
<p>The charger has a hydraulic supply line (8) extending from a volume pump (5) to a hydraulic cylinder (3). A high-pressure pump (6) has a volume performance smaller than that of the volume pump, and develops a pump pressure higher than that of the volume pump. A non-return valve (9) is provided in the supply line to alternatively release or break a hydraulic connection between the volume pump and the hydraulic cylinder. A high pressure line (10) supplies a hydraulic fluid from the high-pressure pump to the hydraulic cylinder over the non-return valve. An independent claim is also included for a pump arrangement of a screen changer comprising a hydraulic accumulator.</p> |
