A Piston Momentum Experimental Instrument with Teaching Effect and Flow Digital Display

Abstract

The invention discloses a piston-type momentum experimental instrument with teaching effect and flow digital display, which comprises: a constant pressure water supply tank with an outlet on the side wall, the outlet is a nozzle; and the outlet of the constant pressure water supply tank The connected water collection tank; the momentum tube used to measure the jet flow force at the outlet of the constant pressure water supply tank is fixed in the water collection tank; the liquid-gas conversion pressure measuring cylinder set in the water stabilization work area of ​​the constant pressure water supply tank, the liquid-gas The top of the conversion pressure measuring cylinder is provided with a connecting positioning tube, which is located on the horizontal plane of the central axis of the outlet; a differential pressure sensor; a microcomputer digital display meter for converting the pressure signal detected by the differential pressure sensor into a flow rate; self-circulating water supply device. The experimental instrument of the present invention can automatically reset, eliminate the error of air compression and real-time zero adjustment, and has high precision, and can conveniently digitally and accurately measure the two basic physical quantities of the jet flow rate and jet flow force of the experimental instrument for the law of momentum of fluid dynamics, and has a good performance teaching effect.

Description

technical field [0001] The invention relates to the field of technical experiment measurement, in particular to a piston-type momentum experimental instrument with teaching effect and flow digital display. Background technique [0002] The law of momentum is one of the basic theories of fluid mechanics and hydraulics, and its momentum equation is the mathematical expression of the law of momentum in theoretical mechanics in fluid mechanics and hydraulics. It reflects the relationship between the momentum change and the force of the fluid motion. Its characteristic is that it is not necessary to know the flow process inside the flow range, but only need to know the flow conditions on its boundary. The interaction force problem between fluid and boundary surface. Therefore, the experiment of the law of momentum is an indispensable content in the teaching process. [0003] Among them, the piston-type momentum law experimental instrument with the patent number ZL 89109218.8 ha...

AI Technical Summary

Problems solved by technology

For the teaching experiment, it will stop the experimental operation halfway, return to the state where the experiment started, and restart the experiment, which is very inconvenient

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