The basic working principle of the metering pump

The metering pump is mainly composed of three parts: power drive, fluid transport and regulation control. The power drive device is mainly composed of three parts: power drive, fluid transfer and regulation control via a metering pump. The power drive device drives the fluid transport diaphragm to reciprocate via a mechanical linkage system. The diaphragm (piston) will be sucked by the transport fluid during the first half of the stroke and discharge the fluid out of the pump head during the second half of the stroke; therefore, the reciprocating frequency of the stroke is changed or each time The stroke length of the reciprocating motion can achieve the purpose of regulating the amount of fluid transported. Precise machining accuracy guarantees precise metering of the delivered medium with each pumping volume.

Due to the difference in power drive and fluid delivery, metering pumps can be roughly divided into two types: plunger type and diaphragm type.

1, plunger metering pump

Plunger metering pumps mainly include two types of valve pumps and valveless pumps. Plunger metering pumps are widely used in the petrochemical industry due to their simple structure and high temperature and pressure resistance. In view of the shortage of ordinary plunger pumps for high-viscosity media under high-pressure conditions, a valveless rotary plunger metering pump has received increasing attention and is widely used in the measurement of high-viscosity media such as syrup, chocolate and petroleum additives. Add to. Due to the structural disadvantage of the inability to achieve complete isolation between the metered medium and the lubricant in the pump, the plunger metering pump is subject to many limitations in fluid metering applications where high pollution resistance is required.
Article from: http://NewsDetail268T2.html China Hardware Business Network http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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