双向液压减振器的失效机理及改进建议

目前使用的双向液压减振器存在结构设计不够合理、密封件耐磨性比较差、密封面镀铬质量不好等缺陷,使其在使用过程中常常过早失效,甚至造成井下故障。为此,根据双向液压减振器的工作原理及主要结构,从外形结构参数、密封件质量、密封面镀铬、内部九头螺纹设计等方面进行了失效机理分析。分析认为,双向液压减振器失效的主要原因均为现场使用不规范或产品设计缺陷。从工具外形尺寸、密封件结构和数量、特殊表面处理工艺、内部螺纹参数等方面提出了改进措施和相应建议。理论分析表明,改进后的双向液压减振器各项性能均大幅提高,同时使用寿命也得以延长。 

Failure Mechanism of Two-Way Hydraulic Shock Absorbers and Improvement Measures

The current two-way hydraulic shock absorber has defects such as unreasonable structure design,poor seal wear resistance,poor chromium plating quality of sealing surface etc..,which often cause premature failures,even well accident.Therefore,we have conducted in-depth analysis of failure mechanism with respect of the shape parameters,sealing quality,sealing surface chrome-plating quality,internal nine thread design according to working principle of the shock absorber,main structure design,and variety of failures in the field application.It is concluded that all the failures are caused by improper use or defects in product design.According to the results of analysis,improvement measures and corresponding suggestions have been proposed in terms of the tool dimensions,seal structure and quantity,special surface treatment process and the internal thread parameters.Theoretical analysis shows that the performance of two-way hydraulic shock absorbers is greatly improved and service life are prolonged at the same time.