Throttling type bistable on-way resistance experiment instrument and method thereof

Abstract

The invention discloses a throttling type bistable on-way resistance experiment instrument and a method thereof. The experiment instrument comprises a water storage tank, a high-lift pump, a water supply pipe, a manually-operated or electrically-operated valve provided with an orifice, a pressure stabilizing tank, an experiment pipeline, a flow adjusting valve, a hopper, a water return pipe, a measuring meter and the like. The on-way resistance experiment instrument must have double functions of a laminar flow experiment and a turbulent flow experiment. When all valves are closed, pressurized water, introduced from the pump, in front of the valves flows to the experiment pipeline through the orifice, the orifice can well eliminate pressure fluctuation of water, caused by the pump, in front of the valves, and a good wave absorbing and pressure stabilizing function is realized; through secondary pressure stabilizing by the aid of the pressure stabilizing tank, and the pressure stabilizing accuracy is within plus or minus 0.5 mm, so that the stable-pressure water supply demand of the laminar flow experiment can be met under the condition of direct supply by the water pump; the stability problem of the laminar flow experiment under the condition of direct supply by the pump is solved; meanwhile, at the turbulent flow stage, the pressure stabilizing tank is used for pressure stabilizing, and a good turbulent flow pressure stabilizing effect is achieved. The experiment instrument device is stable in pressure, high in measuring accuracy, simple in structure and convenient to operate.

Description

technical field [0001] The invention relates to a teaching experiment instrument. In particular, it relates to a throttling type bistable resistance experiment instrument and method thereof. Background technique [0002] In the teaching experiment of fluid mechanics and hydraulics, the resistance experiment along the route is a basic experimental project widely used in colleges and universities. The resistance test instrument used in the process is usually directly supplied by the water pump, which is a self-circulating water supply experimental instrument. The pressure fluctuation in the self-circulating pipeline system caused by the water pump will seriously affect the experimental accuracy and stability of this experimental instrument. The following is an example of the traditional and commonly used 7 mm experimental pipeline resistance test instrument to illustrate its technical background. [0003] The resistance experiment along the route includes the laminar flo...

AI Technical Summary

Problems solved by technology

This voltage stabilization method has the following two problems: one is that the surge tank must be large and the pressure resistance must be high, the production of the tank body is difficult, and the manufacturing cost is high; Such as the surge tank (5) in the accompanying drawing, the diameter of this surge tank is more than 20 cm, and there is no such tank on the market

Currently, small pressure tanks are used and a diverter device is added, but the pressure stabilization effect is generally poor, and there will still be pressure fluctuations above 4-6 mm water column in the laminar flow state

Experimental instruments with pressure fluctuations greater than 2 mm water column cannot meet the requirements of teaching experiments

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