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  • 机械密封的发展史
  • 本站编辑:杭州久密机械科技有限公司发布日期:2020-09-01 10:42 浏览次数:

1、起步阶段(1960-1970年)

1. Initial stage (1960-1970)

这期间产品的液压系统的工作压力大致为12-14MPa。采用的密封系统的密封件有:0形橡胶密封圈(NBR);铁壳一牛皮旋转油封;波纹钢皮十软木十金属弹簧的端面密封;石棉盘根;石棉十橡胶密封垫片;V形密封圈(牛皮十酚醛十胶木);V形密封圈(NBR十夹织物〕;软会属密封垫片等等。

During this period, the working pressure of the hydraulic system of the product is about 12-14mpa. The sealing elements used in the sealing system are: 0-shaped rubber sealing ring (NBR); iron shell and cow leather rotary oil seal; end face seal of corrugated steel skin + cork + metal spring; asbestos packing; asbestos + rubber sealing gasket; V-shaped sealing ring (cowhide + phenolic + bakelite); V-shaped sealing ring (NBR + sandwich fabric); soft joint sealing gasket, etc.

2.创业阶段(1971-1980年)

2. Entrepreneurial stage (1971-1980)

在此期间产品的液压系统工作压力大致为14-3.5MPa。其密封系统中采用的密封件以橡塑密封件为主,淘汰了牛皮、石棉纤维及波纹钢皮十软木的端面密封。主要型式有:0形密封圈(NBR、FKM);履带D底盘用浮动油封(金属环干0形图);D内包骨架旋转油封川(BR、 FKM、ZACM)。液压与气动往复运动密封件则有0形密封圈(NBR、FKM);U形密D射圈(NBR、AU、BU);V形密封圈(NBR十夹织物);杯形密封圈(NBR十夹织物)等。在这10年间,为适应诸如工程机械、锻压机械等,采用了中、高压液压技术,由原机械部组建了7个专业橡塑密封件生产厂。另外为推进中国密封技术的发展,于1975年和1979年组建了“全国液压、气动标准化技术委员会”、“全国液压、气动标准化技术委员会橡塑密封标准化分技术委员会”和“摩擦学会流体密封分技术委员会”。

During this period, the working pressure of the hydraulic system of the product is about 14-3.5mpa. The rubber plastic seal is the main seal used in the sealing system, and the face seal of cow hide, asbestos fiber, corrugated steel skin and cork is eliminated. The main types are: 0-shaped seal ring (NBR, FKM); floating oil seal for crawler D chassis (metal ring dry 0-shaped diagram); D-type inner package framework rotary oil seal (BR, FKM, zacm). Hydraulic and pneumatic reciprocating seals include 0-ring (NBR, FKM); U-shaped dense D-ring (NBR, Au, BU); V-shaped seal ring (nbr-10-clip fabric); cup-shaped seal ring (nbr-10-clip fabric), etc. In the past 10 years, in order to adapt to engineering machinery, forging machinery, etc., medium and high pressure hydraulic technology has been adopted, and seven professional rubber and plastic seal production plants have been established by the original mechanical department. In addition, in order to promote the development of sealing technology in China, the "national hydraulic and pneumatic Standardization Technical Committee", "rubber and plastic seal standardization sub committee of national hydraulic and pneumatic Standardization Technical Committee" and "fluid sealing technical committee of friction society" were established in 1975 and 1979.

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3.巩固和发展阶段(1981-1990年)

3. Consolidation and development stage (1981-1990)

在此期间产品的液压系统的工作压力达到了16-40MPa,其密封系统采用的密封件仍以橡塑密封制品为主。主要型式有:O形密封圈 (NBR、FKM);履带底盘用浮动油封(O形图十金属环);润滑密封履带用密封组件(NBR+AU):内骨架和外骨架旋转油生十(NBR、FKM、 ACM、EPDM);组合密封垫圈(NBR+金属);液压缸活塞和活塞杆动密。封用同轴密封组件(PTFE+NBR);旋转轴用动液压回流油封(NBR、 FKM、ACM);工作压力为13MPa的耐压型旋转油封(NBR、FKM);双向介质旋转油封(NBR、FKM);液O压缸活塞用带支承环双作用往复D动密封组件(NBR+PTFE+POM)等。

During this period, the working pressure of the hydraulic system of the product reached 16-40mpa, and the rubber plastic sealing products were still the main sealing parts of the sealing system. The main types are: O-ring seal (NBR, FKM); floating oil seal for crawler chassis (O-shape diagram x metal ring); sealing component for lubricating sealing track (NBR + AU): rotating oil generator for inner and outer framework (NBR, FKM, ACM, EPDM); combined sealing washer (NBR + metal); dynamic tightness of hydraulic cylinder piston and piston rod. Seal with coaxial seal assembly (PTFE + NBR), rotating shaft with dynamic hydraulic return oil seal (NBR, FKM, ACM); pressure resistant rotary oil seal (NBR, FKM) with working pressure of 13Mpa; bidirectional medium rotary oil seal (NBR, FKM); double acting reciprocating d dynamic sealing assembly with supporting ring for hydraulic o cylinder piston (NBR + PTFE + POM), etc.

4.高速发展阶段(1991年以后)

4. High speed development stage (after 1991)

工程机械和其他中、高压液压行业先后引进了大量的产品制造技术,促进了国外密封商家进入中国密封件市场。国外资金及技术的进入,提高了我国机械密封工业的总体水平。

Construction machinery and other medium and high-pressure hydraulic industries have introduced a large number of product manufacturing technology, which has promoted foreign seal merchants to enter the seal Market in China. The entry of foreign capital and technology has improved the overall level of China's mechanical seal industry.