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[CN 201780095279.8] Flow control valve and hydraulic machine including the flow control valve
[CN 201780095279.8] Flow control valve and hydraulic machinery including the flow control valve Title: Flow control valve and hydraulic machinery including the flow control valve Application number: CN 201780095279.8 Applicant: Volvo Construction Equipment Company Application date: 2017-9-29 Patent type: Invention application discloses a flow control valve. The valve body has an inner peripheral surface defining a longitudinal bore to which at least a portion of the first and second fluid passages are connected. A spool is slidably inserted into the bore to allow fluid flow from the first fluid passage to the second fluid passage. The valve regulates a flow rate of the fluid flowing through the first fluid passage. A first seating surface is defined between a region in which the first fluid channel is connected to the aperture and a region in which the second fluid channel is connected to the aperture. When the flow of the fluid from the first fluid passage to the second fluid passage is started, the area of the gap between the first seat surface and the spool on a plane taken in the transverse direction is 5% to 50%, preferably 10% to 20%, of the area of the opening defined by the first seat surface.
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