Single-piston type dynamic friction pressure boosting and regulating device

Abstract

The invention provides a single-piston type dynamic friction pressure boosting and regulating device which is provided with a dynamic friction driving mechanism, so that an output piston and an output medium cylinder are always in a relative rotation state and are always in a stress state only subjected to dynamic friction, the uncertainty of static friction force is eliminated, and the pressure boosting and regulating efficiency is improved. The stress state between the output piston and the output medium cylinder in the pressure control process is stable and free of sudden change, the response speed of the output piston is increased, and therefore the pressure control efficiency is improved, the pressure control fluctuation is reduced, and the pressure control precision is improved. Pressurizing power acts on the output medium cylinder through the mechanical transmission mechanism, meanwhile, the dynamic friction driving mechanism is directly installed on the output medium cylinder to drive the output medium cylinder to rotate and synchronously axially move along with the output medium cylinder, and the dynamic friction driving mechanism has the advantages of being simple and compact in structure, high in working efficiency, low in noise and the like.

Description

technical field [0001] The invention belongs to the technical field of pressure calibration and control, and in particular relates to a single-piston dynamic friction pressure boosting and pressure regulating device. Background technique [0002] In the calibration process of pressure instruments, pressurization and pressure regulating devices are usually used to obtain high-pressure hydraulic pressure or gas. For single-piston pressurization and pressure regulating devices, a linear motion device or mechanism is generally used as a booster power source to push the output piston or output medium cylinder to make reciprocating linear motion along the axial direction of the output medium cylinder, so that the output liquid or The gas pressure is stably controlled at the set value. In the process of boosting and adjusting the liquid or gas pressure at the output end, the volume of the output medium cylinder is constantly changing, and the output piston or output medium cylinde...

AI Technical Summary

Problems solved by technology

In the process from stationary to moving, such as when the output piston or the output medium cylinder is started, reversing, etc., the static friction force between the output piston and the cylinder along the axis direction is converted into dynamic friction force, and the static friction force increases with the pressure and the piston. , The change of the relative position of the cylinder body changes, so that the force state of the output piston or output medium cylinder during the pressure control is uncertain during the process from static to dynamic, resulting in the inability to accurately control the motion state of the piston, resulting in unstable pressure values, and further High efficiency and high precision of output medium pressure control cannot be achieved

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