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钢制闸门内件主要是指阀门关闭件的密封面和阀杆

网址:www.qibiji58.com   2020-12-16  作者:admin    阅读:

钢制闸门内件主要是指阀门关闭件的密封面和阀杆、衬套(上密封座),内件材料的选用原则是根据主体材料的情况、介质特性、结构特点以及零件所起的作用、受力情况综合考虑的。对于常规的通用阀门,已规定了内件材料或规定了几种材料由设计者根据具体情况选用,对于一些有特殊要求的阀门,如高温、高压、介质有腐蚀等工况条件,则需按钢制闸门工况条件选择内件材料。
Steel gate internals mainly refer to the sealing surface, valve stem and bushing (upper seal seat) of valve closure parts. The selection principle of internal parts material is based on the main material, medium characteristics, structural characteristics and the role and stress of parts. For conventional general-purpose valves, the internal parts materials have been specified or several materials have been specified to be selected by the designer according to the specific conditions. For some valves with special requirements, such as high temperature, high pressure, medium corrosion and other working conditions, the internal material shall be selected according to the working conditions of steel gate.
关闭件即闸板(阀瓣)、阀座,关闭件的密封面是阀门的主要工作面之一。材料选择是否合理以及它的质量状况直接影响阀门的功能和使用寿命。
The sealing surface of the closing part is one of the main working faces of the valve. Whether the material selection is reasonable and its quality directly affects the function and service life of the valve.
关闭件密封面的工作条件:
Working conditions of sealing surface of closure parts:
由于阀门用途十分广泛,因此阀门密封面的工作条件差异很大。压力可以从真空到超高压,温度可以从-269℃到816℃,有些工作温度可达1200℃。工作介质从非腐蚀介质到各种酸碱等强腐蚀性介质。从密封面的受力情况来看,它受挤压和剪切;从磨擦学的角度来看,有磨拉磨损、腐蚀磨损、表面疲劳磨损、冲蚀等等,因此,应该根据不同的工作条件选择相适应的密封面材料。
As the valve is widely used, the working conditions of valve sealing surface are very different. The pressure can be from vacuum to ultra-high pressure, the temperature can be from - 269 ℃ to 816 ℃, and some working temperature can reach 1200 ℃. The working medium ranges from non corrosive medium to strong corrosive medium such as acid and alkali. From the stress of the sealing surface, it is squeezed and sheared; from the point of view of friction, there are wear and tear, corrosion wear, surface fatigue wear, erosion and so on. Therefore, we should choose the appropriate sealing surface material according to different working conditions.

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