The utility model provides a throttle valve stem sealing structure, which comprises a valve body, a support ring, a seal ring, a pressure ring, a cover nut, a valve stem, a lubricating layer and a baffle ring. The sealing ring is O-shaped, the pressure ring is convex, the end of the valve body is concave, and the support ring, a pressure ring, a lubricating layer and a baffle ring are all installed in a concave structure at the end of the valve body. The valve stem is installed in the valve body, the stem passes through the end of the valve body, the supporting ring is sleeved on the valve stem, the sealing ring is located above the supporting ring, the upper and lower sides of the sealing ring are equipped with retaining rings, and a lubricating layer is arranged between the sealing ring and the upper and lower retaining rings, the lubricating layer is sprayed with grease, and the pressure ring sleeve is installed on the valve stem. On the valve stem, the pressure ring is located above the sealing ring. The pressure ring makes the sealing ring, lubrication layer and retaining ring press on the support ring through the pressure cover nut, and the pressure cover nut is installed at the end of the valve body through a thread connection.
【技术实现步骤摘要】
一种节流阀阀杆密封结构
本技术涉及机械密封
,尤其涉及一种节流阀阀杆密封结构。
技术介绍
节流阀是通过改变节流截面或节流长度以控制流体流量的阀门,节流阀一般用于负载变化不大或对速度稳定性要求不高的场合,其具有构造简单,便于制造,便于维修等优点,但一般的节流阀在使用中易造成阀杆的密封圈磨损,使得节流阀阀杆的密封性能下降,从而导致节流阀漏气现象的发生。
技术实现思路
针对上述技术问题,本技术提供一种节流阀阀杆密封结构,结构设计合理简单,制造方便,使得节流阀阀杆的密封圈不易磨损,提高了节流阀阀杆的密封性能,避免了节流阀漏气现象的发生。为实现上述技术目的,本技术采用的技术方案为:一种节流阀阀杆密封结构,包括由阀体、支撑环、密封圈、压环、压盖螺母、阀杆、润滑层、挡圈组成,所述密封圈为O形密封圈,所述压环为凸形,所述挡圈为聚四氟乙烯挡圈,所述阀体的端部为凹形,所述支撑环、密封圈、压环、润滑层与挡圈均安装在阀体端部的凹形结构内,所述阀杆安装在阀体内,该阀杆穿过阀体的端部,所述支撑环套在阀杆上,所述密封圈套在阀杆上,该密封圈位于支撑环的上方,所述密封圈的上、下两侧均安装有挡圈,且密封圈与上、下两侧的挡圈间设置有润滑层,所述润滑层喷涂有润滑脂,该润滑层厚度不大于2mm,所述压环套装在阀杆上,该压环位于密封圈的上方,所述压环通过压盖螺母使得密封圈、润滑层与挡圈紧压在支撑环上,所述压盖螺母通过螺纹连接安装在阀体的端部。作为优选,所述润滑层厚度为1mm。本技术的有益技术效果是:该节流阀阀杆密封结构,结构设计合理简单,制造方便,使得节流阀阀杆的密封圈不易磨损,提高了节流阀阀杆的密封性 ...
【技术保护点】
1.一种节流阀阀杆密封结构,其特征在于:包括由阀体、支撑环、密封圈、压环、压盖螺母、阀杆、润滑层、挡圈组成,所述密封圈为O形密封圈,所述压环为凸形,所述挡圈为聚四氟乙烯挡圈,所述阀体的端部为凹形,所述支撑环、密封圈、压环、润滑层与挡圈均安装在阀体端部的凹形结构内,所述阀杆安装在阀体内,该阀杆穿过阀体的端部,所述支撑环套在阀杆上,所述密封圈套在阀杆上,该密封圈位于支撑环的上方,所述密封圈的上、下两侧均安装有挡圈,且密封圈与上、下两侧的挡圈间设置有润滑层,所述润滑层喷涂有润滑脂,该润滑层厚度不大于2mm,所述压环套装在阀杆上,该压环位于密封圈的上方,所述压环通过压盖螺母使得密封圈、润滑层与挡圈紧压在支撑环上,所述压盖螺母通过螺纹连接安装在阀体的端部。
【技术特征摘要】
1.一种节流阀阀杆密封结构,其特征在于:包括由阀体、支撑环、密封圈、压环、压盖螺母、阀杆、润滑层、挡圈组成,所述密封圈为O形密封圈,所述压环为凸形,所述挡圈为聚四氟乙烯挡圈,所述阀体的端部为凹形,所述支撑环、密封圈、压环、润滑层与挡圈均安装在阀体端部的凹形结构内,所述阀杆安装在阀体内,该阀杆穿过阀体的端部,所述支撑环套在阀杆上,所述密封圈套在阀杆上,该密封圈位于支撑...
【专利技术属性】
技术研发人员:张健廷,
申请(专利权)人:上海新罡科技有限公司,
类型:新型
国别省市:上海,31
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。