Two-dimensional motor-direct-driving electro-hydraulic servo valve with adjustable null position

US11703067B1 · kind B1 · utility

Assignees

• HANGZHOU CITY UNIVERSITY · CN
• Shanghai Marine Equipment Research Institute · CN

Inventors

• Qiang Zuo · Hangzhou City, CN
• Xian Jin Jeff Zhang · Shanghai, CN
• Yaolan Jin · Shanghai, CN
• Zhuhua Deng · Hangzhou City, CN
• Wei Shao · Keelung, TW
• Pengfei Wang · Shanghai, CN
• Jie Xiong · Chengdu, CN
• Liying Lou · Hangzhou City, CN
• Yanwei Zhao · Hangzhou City, CN
• Longlong Leng · Hangzhou City, CN

Key dates

• Filing date: Sep 30, 2022
• Grant date: Jul 18, 2023
• Expiry date: Sep 30, 2042

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2013/0409
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electro-hydraulic servo valve, which has an adjustable null position and can be directly driven by the motor, is provided and includes four parts: a slide valve assembly, a two-dimensional motor, a magnet resetting-to-null mechanism, and a displacement sensor, and the four parts are set coaxially arranged. The slide valve assembly is a conventional two-dimensional servo valve structure. The two-dimensional motor may directly drive the valve core to rotate to further control a size of an opening opened by a valve. The magnet resetting-to-null mechanism is configured to reset the valve to the null position. The displacement sensor may monitor a position of the valve core in real-time and feedback signals to achieve closed-loop controlling.