Base dynamic and static sealing device for ZGM95G type coal mill

Abstract

The utility model discloses a base dynamic and static sealing device for a ZGM95G type coal mill. Along with operation of the coal mill, an upper seal gradually loses efficacy due to the abrasion of pebble coal carried by the mixed air to the radial seal and the abrasion to the shaft shoulder of the transmission disc. The sealing device comprises a sealing box (3) and a coal mill driving disc (1), a dynamic and static upper sealing device (2) is arranged between the coal mill driving disc and the upper part of the sealing box, and a lower sealing device (4) is fixed between the coal mill driving disc and the lower part of the sealing box; the dynamic and static upper sealing device comprises a flange plate (5), a metal rotary sealing ring (6), a metal slag stopping protecting ring (7) and a special-shaped sealing piece (8); and the flange plate is fixed on the lower surface of the driving disc through a bolt, the metal rotary sealing ring is fixed on the outer ring surface of the flange plate, the metal slag stopping protecting ring and the special-shaped sealing piece are fixed on the upper surface of the sealing box, and the metal rotary sealing ring is located between the metal slag stopping protecting ring and the special-shaped sealing piece. The base dynamic and static sealing device is used for base dynamic and static sealing of the ZGM95G type coal mill.

Description

technical field [0001] The invention relates to a dynamic and static sealing device for a base of a ZGM95G coal mill. Background technique [0002] The upper seal of the coal mill frame seal was originally designed as an axial seal, mainly due to the fact that the upper sealing surface is 30mm higher than the lower sealing surface of the transmission disc, and the gap between the two is 1.5±0.5mm to cooperate with the gap for sealing, and the actual installation situation of the coal mill Because the upper sealing surface is lower than the lower sealing surface of the transmission disc, so the gap value is out of the question, so that the sealing air cannot effectively seal the mixed air, and the mixed air carries pebble coal through this gap and leaks into the sealing air chamber, and is sealed by the machine base The lower seal leaks into the environment. With the operation of the coal mill, due to the wear of the radial seal and the wear of the shaft shoulder of the tran...

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Problems solved by technology

[0002] The upper seal of the coal mill frame seal was originally designed as an axial seal, mainly due to the fact that the upper sealing surface is 30mm higher than the lower sealing surface of the transmission disc, and the gap between the two is 1.5±0.5mm to cooperate with the gap for sealing, and the actual installation situation of the coal mill Because the upper sealing surface is lower than the lower sealing surface of the transmission disc, so the gap value is out of the question, so that the sealing air cannot effectively seal the mixed air, and the mixed air carries pebble coal through this gap and leaks into the sealing air chamber, and is sealed by the machine base Lower seal leaks into the environment

With the operation of the coal mill, due to the wear of the radial seal and the wear of the shaft shoulder of the transmission disk by the pebble coal carried by the mixed wind, the upper seal gradually fails. The failure of the upper seal directly causes a large amount of pebble coal carried by the mixed wind to flow from Upper seal passes through, leaks through lower seal

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