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计量泵原理[0]

Posted on 2023年11月14日 by

计量泵 (英语:metering pump,proportional pump)往复泵的一种,利用往复泵流量固定的特点而发展起来的。可以用电动机带动偏心轮从而实现柱塞的往复运动。偏心轮的偏心度可以调整,柱塞的冲程就发生变化,以此来实现流量的调节。 计量泵主要应用在一些要求精确地输送液体至某一设备的场合,或将几种液体按精确的比例输送。如化学反应装置一种或几种催化剂的投放,后者是靠分别调节多缸计量泵中每个活塞的行程来实现的。

计量泵分类

⒈ 根据过流部分:⑴柱塞、活塞式 ⑵机械隔膜式⑶液压隔膜式
⒉ 根据驱动方式:⑴电机驱动⑵电磁驱动
3、根据泵特点:⑴特大机座⑵大机座 ⑶中机座⑷小机座⑸微机座

计量泵特点

  • 柱塞式

1、价格较低
2、流量可达76米3/时,流量在百分之十到百分之百的范围内,计量精度可达±百分之一,压力最大可达350兆帕。出口压力变化时,流量几乎不变。
3、能输送高粘度介质,不适于输送腐蚀性浆料及危险性化学品。
4、轴封为填料密封,有泄漏,需周期性调节填料。填料与柱塞易磨损,需对填料环作压力冲洗和排放。
5、无安全泄放装置。
  • 机械隔膜

1、价格较低。
2、无动密封,无泄漏。
3、能输送高粘度介质,磨蚀性浆料和危险性化学品。
4、隔膜承受高应力,隔膜寿命较低。
5、出口压力2兆帕以下,流量适用范围较小;计量精度为±百分之五,当压力从最小到最大时,流量变化可达百分之十。
6、无安全泄放装置。
  • 液压隔膜

1、无动密封,无泄漏,有安全泄放装置,维护简单。
2、压力可达35兆帕;流量在10︰1范围内,计量精度可达±百分之一;压力每升高6.9兆帕,流量下降百分之五到百分之十。
3、价格较高。
4、适用于中等粘度的介质。

计量泵的调节形式︰可手动调节、电动调节、变频调节.

常用泵供应商名单见此

参考资料:

  1. https://zh.wikipedia.org/wiki/%E8%AE%A1%E9%87%8F%E6%B3%B5
  2. https://zhuanlan.zhihu.com/p/30012327
  3. http://www.16fafa.cn/news/show-125986.html
  4. https://www.mkpum.com/product-44.html
  5. https://baike.baidu.com/item/%E6%B6%B2%E5%8E%8B%E9%9A%94%E8%86%9C%E8%AE%A1%E9%87%8F%E6%B3%B5

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