Device and method for measuring unbalanced moment of bottom surface of round valve element

Abstract

The invention discloses a device and a method for measuring an unbalanced moment of the bottom surface of a round valve element. The device comprises a divergent type special-shaped pipe, a water tank, a transparent tube, a spring dynamometer, laser sources, the round valve element, a valve element bottom surface additional layer, a high-speed camera and a photographing support. Inner hook rings and the laser sources are uniformly distributed on the outer side of the circular valve element of the device; the spring dynamometer is connected with the inner hook rings and outer hook rings uniformly distributed on the inner wall of the transparent tube; and positioning scales are arranged on the outer wall of the transparent tube. According to the measuring method, the high-speed camera is erected on the photographing support to record an unbalanced state formed by the circular valve element under the impact of water flow in different directions; the scales, corresponding to the laser sources, on the outer wall and a pulling force of the spring dynamometer are read out; and a torque, corresponding to a certain specific symmetry axis, of the circular valve element is calculated. The device is simple in structure and easy to manufacture, and can be widely popularized and applied.

Description

technical field [0001] The invention relates to an experimental measuring device and a measuring method, in particular to a measuring device for the unbalanced moment on the bottom surface of a circular valve core. Background technique [0002] In the horizontally arranged valve, the pressure distribution is obviously uneven on the lower bottom surface of the piston-type circular valve core, and the high pressure area is shifted to the right (closer to the outflow direction). Since the pressure distribution on the upper surface of the piston-type circular spool is balanced, the resultant force of the pressure difference formed by the pressure difference between the upper and lower sides will deviate from the central axis of the piston-type spool, resulting in an unbalanced moment and causing the wall surface of the piston-type spool to Squeezing the sealing pair will not only increase the driving energy consumption, affect the sealing performance, but even affect the leakage...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the lack of an experimental device for measuring the unbalanced moment on the bottom surface of a circular valve core on the market, and the existing equipment for measuring torque or force is complicated in structure and difficult to manufacture, and is not suitable for use in a flow field.

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