柱塞计量泵和隔膜计量泵的工作原理及计量泵防爆电机的分类
柱塞式计量泵和隔膜式计量泵都属于计量泵，两者的主要区别是工作方式不同。VAREM柱塞计量泵的动力驱动装置通过机械联动系统驱动流体输送活塞实现往复运动。由于其结构简单、耐高温高压，在石油化工行业得到广泛应用。柱塞式计量泵有两种类型:普通有阀泵和无阀泵。无阀旋转柱塞计量泵越来越受到人们的重视，它广泛用于糖浆、巧克力和石油添加剂等高粘度介质的计量和添加。由于被测介质不能与泵内润滑剂完全隔离的结构缺陷，柱塞计量泵在抗污染要求高的流体计量应用中受到限制。由于膜片的隔离作用，在结构上实现了被测流体与驱动润滑机构之间的隔离。在隔膜计量泵家族成员中，WaterSunny液压驱动隔膜计量泵克服了机械直接驱动模式下泵隔膜应力集中过大的缺点，因为液压油用于均匀驱动隔膜。ZILMET隔膜计量泵的动力驱动装置通过机械联动系统驱动流体输送隔膜实现往复运动。
好了，以上是柱塞计量泵和隔膜计量泵的工作原理。接下来说说计量泵防爆电机的分类:
1.根据电机原理，可分为防爆异步电机、防爆同步电机和防爆DC电机。
2.根据应用场所:可分为煤矿用防爆电机和工厂用防爆电机。
3.根据防爆原理，可分为防爆电机、增安型电机、正压电机、无火花电机和防尘防爆电机等。
4.可分为煤矿输送机防爆电机、绞车防爆电机、装岩机防爆电机、煤矿风机防爆电机、阀门防爆电机、风机防爆电机、船用防爆电机、起重冶金防爆电机和加氢装置增安型无刷励磁同步电机。此外，还可按额定电压、效率等技术指标分类，如高压防爆电机、高效防爆电机、高转差率防爆电机、高起动转矩防爆电机等。
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.