| 水泵的汽蚀现象 |
| 添加时间：2020/8/1 16:53:33 浏览次数： |
| 水泵的汽蚀现象 Cavitation of water pump 水泵的汽蚀是由水的汽化引起的，所谓汽化就是水由液态转化为汽态的过程。水的汽化与温度和压力有一定的关系，在一定压力下，温度升高到一定数值时，水才开始汽化；如果在一定温度下，压力降低到一定数值时，水同样也会汽化，把这个压力称为水在该温度下的汽化压力。如果在流动过程，某一局部地区的压力等于或低于与水温相对应的汽化压力时，水就在该处发生汽化。汽化发生后，就会形成许多蒸汽与气体混合的小汽泡。当汽泡随同水流从低压区流向高压区时，汽泡在高压的作用下破裂，高压水以极高的速度流向这些原汽泡占有的空间，形成一个冲击力。金属表面在水击压力作用下，形成疲劳而遭到严重破坏。因此我们把汽泡的形成、发展和破裂以致材料受到破坏的全部过程，称为汽蚀现象。 The cavitation of water pump is caused by the vaporization of water, the so-called vaporization is the process of water from liquid state to vapor state. The vaporization of water has a certain relationship with temperature and pressure. Under a certain pressure, when the temperature rises to a certain value, water begins to vaporize; if at a certain temperature, when the pressure decreases to a certain value, water will also vaporize. This pressure is called the steam pressure of water at this temperature. If the pressure in a local area is equal to or lower than the vaporization pressure corresponding to the water temperature in the flow process, water will vaporize there. After vaporization, many small bubbles of steam and gas will be formed. When the bubble flows from the low pressure area to the high pressure area along with the water flow, the bubble breaks under the action of high pressure, and the high-pressure water flows to the space occupied by these original bubbles at a very high speed, forming an impact force. Under the action of water hammer pressure, the metal surface forms fatigue and is seriously damaged. Therefore, we call the whole process of the formation, development and rupture of vapor bubbles and the destruction of materials as cavitation phenomenon. 水泵振动原因分析导致机组和泵房建筑物产生振动的原因较多，有些因素之间既有联系又相互作用，概括起来主要有以下四个方面的原因。 There are many reasons for the vibration of the unit and the pump house building caused by the pump vibration analysis. Some factors are related and interact with each other, which can be summarized as the following four aspects. |
| 上一页 球墨铸铁管主要特点 |
| 下一页 铸铁蝶阀的开度与流量之间的关系 |
Copyright © 技术支持：遨游网络