JPS6182174U

JPS6182174U -

Info

Publication number: JPS6182174U
Application number: JP1984167447U
Authority: JP
Priority date: 1984-11-06
Filing date: 1984-11-06
Publication date: 1986-05-31

Description

[Brief explanation of drawings]

第１図は本考案の第一の実施例を示すメカニカ
ルシールの正断面図、第２図は同シール部材の正
面図、第３図は第２図におけるＡ−Ａ線断面図、
第４図は作動状態を示す一次シール部の半裁正断
面図、第５図は他の実施例を示すメカニカルシー
ルの正断面図、第６図は同シール部材の正面図、
第７図は第６図におけるＢ−Ｂ線断面図、第８図
は作動状態を示す一次シール部の半裁正断面図で
ある。１……シヤフト、２……ハウジング、４……固
定側シール環、５……一次シール、８……回転環
、９……シール部材、９ａ……リツプ部、１１，
１７……回転浮上機構、１２……翼状切欠、１３
……非摺動型二次シール、１６……ネジシール、
１８……弧状片、１９……重鎮。 FIG. 1 is a front sectional view of a mechanical seal showing a first embodiment of the present invention, FIG. 2 is a front view of the same seal member, and FIG. 3 is a sectional view taken along line A-A in FIG.
FIG. 4 is a half-cut sectional view of the primary seal part showing an operating state, FIG. 5 is a front sectional view of a mechanical seal showing another embodiment, and FIG. 6 is a front view of the same seal member.
FIG. 7 is a sectional view taken along the line B--B in FIG. 6, and FIG. 8 is a half-cut sectional view of the primary seal portion showing an operating state. DESCRIPTION OF SYMBOLS 1... Shaft, 2... Housing, 4... Fixed side seal ring, 5... Primary seal, 8... Rotating ring, 9... Seal member, 9a... Lip portion, 11,
17... Rotating levitation mechanism, 12... Wing-shaped notch, 13
...Non-sliding secondary seal, 16...Screw seal,
18...Arc-shaped piece, 19...Heavyweight.

Claims

[Claims for Utility Model Registration] (1) The primary seal arranged in series with the secondary seal is constituted by a lip seal made of an elastic sealing member such as rubber or Teflon resin, and the sealing member is airtightly attached to the shaft side. At the same time, an annular lip formed on the inner diameter of the seal member is elastically brought into close contact with the outer periphery of the housing-side seal part, and is connected to the lip and expands outward on the outer diameter as the shaft rotates. What is claimed is: 1. A mechanical seal comprising a rotary levitation mechanism configured to move the lip portion back and away from the outer periphery of the seal portion. (2) The mechanical seal according to claim 1, wherein the rotational floating mechanism is a wing-shaped notch formed on the inner diameter surface of a cylindrical edge extending from the lip portion of the seal member. (3) The scope of the utility model registration claim characterized in that the rotational flotation mechanism is comprised of arc-shaped pieces divided in the circumferential direction extending from the lip portion of the sealing member, and heavy weights fixed to each of the arc-shaped pieces. The mechanical seal described in item 1. (4) The mechanical seal according to any one of claims 1 to 3, wherein the secondary seal is a non-sliding type seal such as a screw seal.