Vibrating displacement signal online detection device internally provided with valve element of pilot valve

Abstract

The invention provides a vibrating displacement signal online detection device internally provided with a valve element of a pilot valve. A valve body is provided with a hollow cavity. One end of the valve body is connected with a positioning nut, and the other end of the valve body is connected with an end cap. A pressure-regulation screw is connected with the positioning nut through a thread. A stop block, a regulation rod, an electric eddy sensor, the conical valve element and a valve seat are arranged in the valve body in sequence. One end of the stop block abuts against one end of the pressure-regulation screw, and the other end of the stop block is connected with the regulation rod. A longitudinal notch is formed in one end of the regulation rod, and a cylindrical through hole is formed in the center of the regulation rod. The electric eddy sensor is of a T-shaped structure and is arranged in the regulation rod in a sleeved mode, and a probe part of the electric eddy sensor stretches out of the regulation rod. A hollow cavity is formed in the electric eddy sensor. A measurement coil is mounted at the top end of a hollow cavity of a probe and led out of the valve body through an extension cable. The regulation rod can move in the axial direction, and the probe of the electric eddy sensor and the valve element are sleeved with a regulation spring in the circumferential direction. The vibrating displacement signal online detection device is simple in structure, easy to dismount and stable in operation, and the influence on the flow field performance of the valve cavity is small.

Description

technical field [0001] The invention belongs to the technical field of on-line detection and investigation in fault diagnosis and investigation of hydraulic cone valves, and in particular relates to an on-line detection device for vibration displacement signals of a built-in pilot valve spool. Background technique [0002] Existing large-scale construction machinery hydraulic system troubleshooting mainly relies on technologies such as working condition monitoring, fault separation and location, and parameter identification. The advantages are that the technology is relatively mature and the analysis methods are diverse. However, the traditional state detection technology has a complex workflow, a long time-consuming period, low efficiency, and a high probability of misjudgment. These shortcomings will limit the development needs of hydraulic systems for intelligence, integration, and informatization. Contents of the invention [0003] The object of the present invention i...

AI Technical Summary

Problems solved by technology

However, the traditional state detection technology has a complex workflow, a long time-consuming cycle, low efficiency, and a high probability of misjudgment. These shortcomings will limit the development needs of intelligent, integrated, and informatized hydraulic systems.

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