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[CN 202010438923.0] Apparatus for providing ports to mechanical parts of hydro-mechanical devices
[CN 202010438923.0] Equipment for providing ports to the mechanical part of a hydraulic mechanical device Title: Equipment for providing ports to the mechanical part of a hydraulic mechanical device Application number: CN 202010438923.0 Applicant: Danfoss Co., Ltd. Application date: 2020-5-21 Patent type: Invention application The present invention relates to a device for providing ports to the mechanical part (26) of a hydraulic mechanical device (40), the apparatus (10) comprises a low pressure inlet port (12), a leak inlet (16), a low pressure chamber (18) having a low pressure opening (22) for establishing fluid communication with the mechanical part (26), a high pressure outlet port (14), and a high pressure chamber (20) in fluid communication with the high pressure outlet port (14), the high pressure chamber (20) has a high pressure opening (24) for establishing fluid communication with the mechanical part (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 mechanical part (26) to the leakage inlet (16), characterized in that, the apparatus (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) transitions to an open state when the pressure in the leakage inlet (16) is above a predetermined control pressure threshold relative to the pressure in the low pressure chamber (18). The apparatus (10) reduces cavitation in the hydro-mechanical device (40).
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