Rotary control valve

Abstract

The invention relates to a control valve. By means of the control valve, the deficiencies that an existing control valve is large in leakage amount and low in reliability are overcome. The control valve comprises a valve body and a valve rod. The two ends of the valve rod are provided with a positioning mechanism and a rotating mechanism respectively. Valve rod oil channels are formed in the valve rod. The valve rod is provided with spherical sections. Valve rod oil ports communicated with the valve rod oil channels are formed in the spherical sections. Valve port channels which are perpendicular to the valve rod are formed in the valve body. Sleeves are arranged in the valve port channels. One ends of the sleeves make contact with the spherical sections in a line seal mode, and the other ends of the sleeves are provided with springs. The springs provide elastic force for the sleeves. Spring cavities are communicated with valve body oil channels in the valve body. When the valve rod oil ports and the sleeves are opposite, the valve rod oil channels are communicated with the valve body oil channels through the sleeves. According to the rotary-valve-type control valve, when the valve rod is rotated, the valve rod oil channels are communicated with different oil channels in the valve body through the cooperation between the valve rod oil ports and the sleeves, and the trend of oil ways is controlled. The spherical sections are in line-contact connection with the sleeves in a cone sealing mode, good sealing line-contact can be maintained, the control valve cannot be stuck, and the rotary-valve-type control valve has the advantages of being small in leakage amount and high in reliability.

Description

technical field [0001] The present invention relates to a hydraulic control component, more particularly, to a rotary valve type control valve. Background technique [0002] Among the existing hydraulic control valves, they can be roughly divided into two types, one is the slide valve type, this type of valve includes a valve body, and a valve stem is arranged in the valve cavity of the valve body, the valve stem is cylindrical, and there is a valve stem on it. There are multiple cylindrical shoulders, the shoulders are sealed with the inner wall of the valve cavity, and the valve stem moves axially to block or connect the passages between different oil ports on the valve body. The other type is a rotary valve control valve. This type of valve includes a valve body. A valve stem is installed in the valve cavity of the valve body. There is an oil passage in the stem, and at least one of the outlet and the inlet of the oil passage is set on the side surface of the valve stem....

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