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AssigneeDanfoss A/S
InventorsGeorg Enevoldsen, Poul Erik Hansen, Frank Holm Iversen
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The invention relates to a device for supplying ports to a machine section (26) of a hydraulic machine arrangement (40), the device (10) comprising a low-pressure inlet port (12), a leakage inlet (16), a low-pressure chamber (18) having a low-pressure opening (22) for establishing fluid communication with the machine section (26), a high-pressure outlet port (14), and a high-pressure chamber (20) that is in fluid communication with the high-pressure outlet port (14), the high-pressure chamber (20) having a high-pressure opening (24) for establishing fluid communication with the machine section (26), wherein the low-pressure inlet port (12) is in fluid communication with the low-pressure chamber (18), wherein a leakage path (36) extends from the high-pressure chamber (20) through the machine section (26) to the leakage inlet (16), characterized in that the device (10) further comprises a control valve member (28) connecting the leakage inlet (16) to the low-pressure chamber (18), wherein the control valve member (28) transfers to an open state when a pressure in the leakage inlet (16) with respect to a pressure in the low-pressure chamber (18) is higher than a predefined control pressure threshold. The device (10) reduces cavitation in hydraulic machine arrangements (40).
A device for supplying ports to a machine section of a hydraulic machine arrangement, the device comprising a low-pressure inlet port, a leakage inlet, a low-pressure chamber having a low-pressure opening for establishing fluid communication with the machine section, a high-pressure outlet port, and a high-pressure chamber that is in fluid communication with the high-pressure outlet port, the high-pressure chamber having a high-pressure opening for establishing fluid communication with the machine section, wherein the low-pressure inlet port is in fluid communication with the low-pressure chamber, wherein a leakage path extends from the high-pressure chamber through the machine section to the leakage inlet, wherein the device further comprises a control valve member connecting the leakage inlet to the low-pressure chamber, wherein the control valve member transfers to an open state when a pressure in the leakage inlet with respect to a pressure in the low-pressure chamber is higher than a predefined control pressure threshold, and wherein the control valve member is an adjustable valve member for adjusting the predefined control pressure.
Dependencies are inferred from the claim text.