Mist Pump Box Design Method
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Flow control of Mist Pump Box . The displacement per revolution of the main pump is determined by the stroke and the diameter of the plunger. Without replacing the plunger, the change in output pressure is ignored. Theoretically, the pump speed determines the output flow of the main pump. Due to the low speed of the main pump, the maximum is generally 3 to 400 rpm. If the displacement is large, the speed may be lower. Therefore, a reduction device must be used between the prime mover and the main pump, which can be a belt or a gear box. The effect of controlling the output flow of the main pump can be achieved by changing the rotation speed of the main pump drive shaft. The main pump can be driven by an electric motor or an engine.
1. The AC variable frequency AC motor adopts a variable frequency controller for speed regulation. The structure is simple, and the main pump speed can be changed in a larger range. However, frequency conversion control has relatively high environmental requirements. The environmental temperature is 10℃～50℃. It requires no combustible gas, corrosive gas, oil mist, dust, etc., and the price is also high. Another important consideration is the power supply capability of the drilling wellsite.
2. Diesel engine driving the diesel engine as the power source of the atomization pump is also an option to control the rotation speed of the atomization pump. The rotation speed of the diesel engine is generally around 1500rpm. The speed of the atomization pump can be adjusted through the reduction box and gearbox. The limitation of speed regulation causes the output of the system to be unable to seamlessly and steplessly regulate. It can be set to several gears. Coupled with the governor control of the engine, it can basically meet the needs of the atomization pump for displacement changes.
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Last Update : 17 September 2020
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