柱塞計量泵和隔膜計量泵的工作原理及計量泵防爆電機的分類
柱塞式計量泵和隔膜式計量泵都屬于計量泵，兩者的主要區別是工作方式不同。VAREM柱塞計量泵的動力驅動裝置通過機械聯動系統驅動流體輸送活塞實現往復運動。由于其結構簡單、耐高溫高壓，在石油化工行業得到廣泛應用。柱塞式計量泵有兩種類型:普通有閥泵和無閥泵。無閥旋轉柱塞計量泵越來越受到人們的重視，它廣泛用于糖漿、巧克力和石油添加劑等高粘度介質的計量和添加。由于被測介質不能與泵內潤滑劑完全隔離的結構缺陷，柱塞計量泵在抗污染要求高的流體計量應用中受到限制。由于膜片的隔離作用，在結構上實現了被測流體與驅動潤滑機構之間的隔離。在隔膜計量泵家族成員中，WaterSunny液壓驅動隔膜計量泵克服了機械直接驅動模式下泵隔膜應力集中過大的缺點，因為液壓油用于均勻驅動隔膜。ZILMET隔膜計量泵的動力驅動裝置通過機械聯動系統驅動流體輸送隔膜實現往復運動。
好了，以上是柱塞計量泵和隔膜計量泵的工作原理。接下來說說計量泵防爆電機的分類:
1.根據電機原理，可分為防爆異步電機、防爆同步電機和防爆DC電機。
2.根據應用場所:可分為煤礦用防爆電機和工廠用防爆電機。
3.根據防爆原理，可分為防爆電機、增安型電機、正壓電機、無火花電機和防塵防爆電機等。
4.可分為煤礦輸送機防爆電機、絞車防爆電機、裝巖機防爆電機、煤礦風機防爆電機、閥門防爆電機、風機防爆電機、船用防爆電機、起重冶金防爆電機和加氫裝置增安型無刷勵磁同步電機。此外，還可按額定電壓、效率等技術指標分類，如高壓防爆電機、高效防爆電機、高轉差率防爆電機、高起動轉矩防爆電機等。
Working principle of plunger metering pump and diaphragm metering pump and classification of explosion proof motor of metering pump
Plunger metering pump and diaphragm metering pump belong to metering pump, the main difference between them is the different working mode. The power driving device of varem plunger metering pump drives the fluid conveying piston through mechanical linkage system to realize reciprocating motion. Because of its simple structure, high temperature and high pressure resistance, it is widely used in petrochemical industry. There are two types of plunger metering pump: ordinary valved pump and valveless pump. More and more people pay attention to valveless rotary piston metering pump, which is widely used in the measurement and addition of syrup, chocolate, petroleum additives and other high viscosity media. Due to the structural defect that the measured medium can not be completely isolated from the lubricant in the pump, the plunger metering pump is limited in the application of fluid metering with high anti pollution requirements. Due to the isolation function of the diaphragm, the isolation between the measured fluid and the drive lubrication mechanism is realized in structure. Among the members of the diaphragm metering pump family, the watersunny hydraulic driven diaphragm metering pump overcomes the disadvantage of excessive stress concentration in the diaphragm of the pump in the mechanical direct drive mode, because the hydraulic oil is used to drive the diaphragm evenly. The power driving device of zilmet diaphragm metering pump drives fluid conveying diaphragm to realize reciprocating motion through mechanical linkage system.
Well, the above is the working principle of plunger metering pump and diaphragm metering pump. Next, we talk about the classification of explosion-proof motor of metering pump
1. According to the principle of motor, it can be divided into explosion-proof asynchronous motor, explosion-proof synchronous motor and explosion-proof DC motor.
2. According to the application place: it can be divided into coal mine explosion-proof motor and factory explosion-proof motor.
3. According to the explosion-proof principle, it can be divided into explosion-proof motor, increased safety motor, positive pressure motor, non spark motor and dust-proof explosion-proof motor.
4. It can be divided into coal mine conveyor explosion-proof motor, winch explosion-proof motor, rock loader explosion-proof motor, coal mine fan explosion-proof motor, valve explosion-proof motor, fan explosion-proof motor, marine explosion-proof motor, lifting metallurgy explosion-proof motor and hydrogenation device increased safety brushless excitation synchronous motor. In addition, it can also be classified according to the rated voltage, efficiency and other technical indicators, such as high voltage explosion-proof motor, high efficiency explosion-proof motor, high slip explosion-proof motor, high starting torque explosion-proof motor, etc.