An adjusting valve for stabilizing oil pressure and a hydraulic system pressure regulating method

Abstract

This invention discloses a hydraulic pressure regulating valve and a hydraulic system pressure regulation method for stabilizing hydraulic pressure. The valve includes a housing with a main oil passage and a connected receiving cavity. A bushing and a support seat are sequentially arranged from the inlet to the outlet end within the receiving cavity. An annular cavity exists near the inlet end between the bushing and the housing. An oil passage connecting the main oil passage and the annular cavity is opened on the bushing, and a return oil port connecting the annular cavity is on the housing. A valve core with a hollow channel is axially movable within the bushing, with a sealing part at one end. A piston is fitted around the outer circumference of the valve core's outlet end, and a first spring between the piston and the support seat provides preload force to close the oil passage of the sealing part. The support seat has a pilot overflow hole connecting to the hollow channel of the valve core, and a sealing ball and a second spring at the outlet constitute a pilot overflow valve. The housing also has an oil drain passage, branching into two paths leading to the annular cavity and an external drain port, respectively. This invention can maintain stability under high flow rates and respond quickly to pressure changes, making it suitable for applications such as aerospace where high hydraulic performance is required.

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