共查询到20条相似文献,搜索用时 93 毫秒
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楔式闸阀阀体密封面加工夹具花山阀门厂付林胜刘超加工楔式闸阀阀体密封面时,必须保证两密封面斜度的准确性及对称性,它的加工精度直接影响到产品的密封性能。新设计制造的通用的楔式闸阀阀体密封面加工夹具(图1),省时方便,效果良好。在加工某一规格闸阀时,只需通... 相似文献
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孙锦顺 《机械工人(冷加工)》1994,(9)
图1所示的工件是一种疏水阀阀体,我们在加工共法兰连接孔时设计了如图2所示的通用钻夹具,解决了通径为Dg15到Dg50六种规格阀体法兰连接孔的加工问题。 按阀体通径规格要求,我们分别设计了六种专用钻模板4,定位环2和定位轴8。更换这些专用部件,就可实现钻夹具的通用。 相似文献
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介绍了水煤浆工况用硬密封球阀的结构特点,分析了水煤浆工况用硬密封球阀在设计过程中所遇到的技术难点及相关解决方案,阐述了硬密封球阀密封面材料配对形式的选择及机加工工艺的特殊要求。 相似文献
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彭文华 《中国制造业信息化》2005,34(9):115-117
喷吸阀中的阀柜零件属于薄壁类零件,磨削内圆时容易引起变形,针对该阀柜零件的精度要求和特点,专门设计了内圆磨床夹具,并对该夹具的主要相关技术进行了分析,可供广大工艺人员参考。 相似文献
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Aimed at the technical problems such as the influence of granular medium on spring pre-tightening force sealing, a new ball valve based on elastic ring valve seat structure is studied. The spring plate type valve seat structure is designed to cooperate with the ball core for sealing, and the blade spring coil is used to cooperate with the ball core for sealing in the spring plate type valve seat structure. Wherein the supporting back ring supports the blade leaf spring on the outer side to enhance and protect the role of the blade spring coil. The design without the spring cavity avoids the problem of sealing failure caused by medium entering into the spring cavity and affecting the compression spring, and avoids the situation that the valve seat can be sealed with the ball core by pre-tightening the compression spring, thus avoiding the problem of sealing failure caused by the valve seat sticking on the valve body. The mechanical and flow characteristics are studied and analyzed by the ball valve characteristic test system. The stem torque, unbalance torque, flow characteristics and flow coefficient variation at different nominal diameters are analyzed. The seal allowable squeeze stress and seal surface pressure are analyzed, and the seal is stable and reliable with the seal pressure meeting the seal design criteria. The fluid dynamics simulation analyzes the velocity, pressure and flow traces of the fluid flowing through the ball valve under three opening degrees: fully closed, half open and fully open, the maximum velocity-pressure and opening degree variation curves of the inlet and outlet, the maximum velocity-pressure and opening degree variation curves of the inlet and outlet under different nominal diameters and the flow resistance coefficient curves. Static strength analysis was done for the ball core and spring plate seat structure to obtain the stress, displacement, strain and safety factor. The fatigue strength of the ball spool and spring-loaded plate seat structure was analyzed, and the total number of lives (cycles) and load factors were obtained, and the results show that the fatigue strength of the ball spool and spring-loaded plate seat structure is safe and the fatigue strength meets the requirements. Ball valve pressure test, low pressure sealing test and high pressure sealing test, valve body strength and ball valve sealing performance all meet the requirements. 相似文献
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