The sealing device is provided by the utility model. The number of parts of the sealing device is small, in particular, the number of parts is less than three, which can realize the compactness of the sealing device, has the resistance to extrusion, and can reduce the sliding resistance very low. The sealing device is composed of an inner seal ring and the outer sealing ring and gasket ring, outer sealing ring, sealing ring is set on the peripheral surface of the holding groove, and slidably contact with the opposite surface, the pad ring configuration on the inner side of the inner sealing ring. The inner sealing ring is formed by the material with higher rigidity than the outer sealing ring, and has a notch part on one part of the circumference. The outer sealing ring is formed by the material which has low friction and low rigidity compared with the inner sealing ring, and has no joint formation. The cushion ring is formed by the elastic material which is higher than the outer sealing ring and the inner sealing ring, and has the elasticity that the outer sealing ring is pressed to the opposite surface through the inner sealing ring.
【技术实现步骤摘要】
密封装置
本技术涉及关于密封技术的密封装置。本技术的密封装置例如用作往复式液压缸的活塞密封或者用作其他的油压设备中的密封等。
技术介绍
以往,例如作为高压用往复式液压缸的活塞密封已知有图12的(A)所示的密封装置51,该密封装置51安装在活塞的外周面设置的环状的安装槽上,并且通过与缸体的内周面可滑动地紧密接触来在活塞和缸体之间对高压的压力油等进行密封,密封装置51由密封环52、垫环53和支撑环54、55的组合构成,其中,密封环52与缸体的内周面可滑动地紧密接触,且由PTFE制成,垫环53配置在密封环52的内周侧并由支承密封环52的环状的凸部53a和比该凸部53a更宽的基座部53b构成,垫环53的截面为凸形状,由NBR制成,支撑环54、55以夹着密封环52和垫环53的凸部53a的方式配置,且由一对聚酰胺树脂制成。上述图12的(A)的密封装置51从各零件的形状、配置和材质上的特性等来看可以发挥优异的密封性,但是存在由于零件数目多因此安装空间大且零件成本高的问题。因此,近年来,如图12的(B)所示,由更紧凑的、低成本的聚酰胺树脂制的密封环62和NBR制的垫环63的组合构 ...
【技术保护点】
一种密封装置,所述密封装置安装在安装槽中,所述安装槽设置在相互对置且相对移动的内周侧部件和外周侧部件中的所述内周侧部件的对置面上,并且所述密封装置通过与所述外周侧部件的对置面可滑动地紧密接触,由此在所述内周侧部件和所述外周侧部件的对置面之间抑制高压侧的密封对象向低压侧泄漏,所述密封装置的特征在于,所述密封装置通过内密封环、外密封环和垫环的组合构成,所述内密封环配置在所述外周侧部件的对置面的内周侧,所述外密封环被保持在所述内密封环的外周面上设置的保持槽中,并且与所述外周侧部件的对置面可滑动地接触,所述垫环配置在所述内密封环的内周侧,所述内密封环由相比所述外密封环刚性高的材质形 ...
【技术特征摘要】
1.一种密封装置,所述密封装置安装在安装槽中,所述安装槽设置在相互对置且相对移动的内周侧部件和外周侧部件中的所述内周侧部件的对置面上,并且所述密封装置通过与所述外周侧部件的对置面可滑动地紧密接触,由此在所述内周侧部件和所述外周侧部件的对置面之间抑制高压侧的密封对象向低压侧泄漏,所述密封装置的特征在于,所述密封装置通过内密封环、外密封环和垫环的组合构成,所述内密封环配置在所述外周侧部件的对置面的内周侧,所述外密封环被保持在所述内密封环的外周面上设置的保持槽中,并且与所述外周侧部件的对置面可滑动地...
【专利技术属性】
技术研发人员:前田敏行,中村孝史,
申请(专利权)人:NOK株式会社,
类型:新型
国别省市:日本,JP
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