Porthole mouthpiece tester with movable contact

Abstract

The invention discloses aperture nozzle experiment device with mobile contact. It has self loop water supplier, in which a pump is arranged, the pump is controlled by controllable silicon stepless speed regulator, the self loop water supplier is connected to constant pressure water box and back groove, the constant pressure water box is arranged with overflow board and water stabling aperture board, the constant pressure water box is connected to water inlet and outlet through the self loop water supplier, the surface facing to the back groove is arranged with aperture nozzle, switching board, scale and pressure measuring pipe, the outlet of the back groove is arranged with a circular back device. The invention uses independent self loop constant water supplying system, it is convenient, the precision is high reaching to 0.01mm.

Description

technical field [0001] The invention relates to an experimental measuring instrument, in particular to an orifice nozzle experimental instrument with a moving contact. Background technique [0002] The flow phenomenon of the fluid flowing out through the orifice is called the orifice outflow, and the outflow condition can be the outflow under the constant water head or the outflow under the variable water head, it can flow into the air, or it can flow into the fluid of the same medium. Install a short tube with a length about 3 to 4 times the diameter of the orifice on the periphery of the orifice. Such a short tube is called a cylindrical outer nozzle. Nozzles can be divided into streamlined nozzles, cylindrical outer nozzles, and conical nozzles according to their shapes. The fluid flows through the short pipe and forms a full pipe flow at the outlet section. This flow phenomenon is called nozzle outflow. [0003] The orifice nozzle is a device used to measure flow, and ...

AI Technical Summary

Problems solved by technology

However, for a long time, the traditional orifice and nozzle experimental instrument has certain disadvantages in terms of structural layout and teaching methods: First, the traditional experimental instrument has a complex structure, a large water tank, large water supply and return facilities, and weighing equipment. It occupies a large area, consumes a lot of energy, and has a complex structure; secondly, in order to measure the lateral contraction diameter of the orifice jet, people have tried their best, but there is no simple and convenient method with high precision.

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