摘要
针对钻井泵泵阀使用寿命短且更换次数频繁,严重制约着钻井泵向高压、高冲次及大排量方向发展的现状,利用CFD相关软件对钻井泵在120次/min的额定冲次、阀体锥角为55°的标准泵阀参数及不同锥角、不同冲次情况下泵阀的流场分布情况进行了动态仿真分析。结果表明,随着吸入冲程的进行,流场内最大速度呈现出先增大后减小的趋势;阀隙入口处的流场速度最大,这是阀体锥面底部易产生块状脱落的根本原因;在阀体附近产生较强的漩涡,将带动周围钻井液中的粒子对泵阀及液缸产生强烈的冲蚀作用;随阀体锥角增加和冲次的上升,泵阀内的流场速度分布水平呈上升趋势。
The short service life and frequent replacement of the drilling pump valve makes it difficult for the pump to develop to high power and pressure as well as large volume.The inner flow field of the valve was dynamically simulated and calculated at rated stroke rate 120/min of drilling pump and cone angle 55°of standard valve parameters and at different taper angle and stroke rate by CFD. The results show that with the suction stroke progress, the maximum speed of the flow field first increases and then decreases; the maximum speed of the flow field is at the entrance of valve clearance, which is the root cause that the bottom of valve body is easy to produce massive shedding; strong swirls near the valve body drive around the drillingfluid particles, which have a strong erosion effect for valve system and hydraulic cylinders; With the increase of the valve cone angle and the rise of the stroke rate, the velocity distribution of flow field in the valve system is increasing.
出处
《机械设计与制造》
北大核心
2017年第6期143-146,共4页
Machinery Design & Manufacture
基金
省部共建"石油天然气装备"教育部重点实验室(西南石油大学)项目资助(2015sts03)
关键词
钻井泵
泵阀
冲蚀磨损
CFD
动态仿真
Drilling Pump
Valve
Erosion Wear
CFD
Dynamically Simulate
