Anti-wedging pressure seal ring apparatus

Anti-wedging pressure seal ring apparatus

  • CN 1,035,279 C
  • Filed: 01/17/1990
  • Issued: 06/25/1997
  • Est. Priority Date: 01/18/1989
  • Status: Active Grant
First Claim
Patent Images

1. be used for being located at the seal arrangement of valve plug (26) of the bonnet cylinder (27) of steam turbine steam control valve (25), above-mentioned valve plug (26) is provided with a wiper seal annular groove (31) together with the pressure ring (30) that is configured in wherein, above-mentioned wiper seal annular groove (31) has two relative radial walls (33,34) and an internal surface (32), it is characterized in that:

  • contiguous above-mentioned internal surface (32) locates to form a protective trough (35) in an above-mentioned radial wall (34) of above-mentioned wiper seal annular groove (31), to prevent the EDGE CONTACT of above-mentioned seal ring (30) and the low voltage side of above-mentioned relative radial wall, thereby prevent at valve plug between (26) spreadable life, because radially cell wall (34) wearing and tearing, face makes pressure ring (30) wedge between valve plug (26) and bonnet cylinder (27) endoporus.

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