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[CN 201980094975.6] hydraulic machinery


[CN 201980094975.6] Hydraulic Machinery Title: Hydraulic Machinery Application Number: CN 201980094975.6 Applicant: Volvo Construction Equipment Company Application Date: 2019-4-5 Patent Type: Invention Application for a hydraulic machinery, which can include: boom actuator (313), The boom actuator includes a large chamber (313a) and a small chamber (313b); a storage tank (101); and an energy recovery circuit (500), the energy recovery circuit is arranged between the boom actuator (313) and the tank (101), wherein the energy recovery circuit (500) comprises: a discharge valve (513) arranged between the large chamber (313a) and the tank (101) to allow or prevent fluid flow from the large chamber to the tank; a regeneration valve (509), the regeneration valve connects the large chamber (313a) and the small chamber (313b) to allow or prevent fluid flow from the large chamber to the small chamber; a recovery part (525) for recovering energy; and a first valve (517), The first valve is arranged between the large chamber (313a) and the recovery part (525), to allow or prevent fluid flow from the large chamber to the recovery section.