JPH0436171U

JPH0436171U -

Info

Publication number: JPH0436171U
Application number: JP7833290U
Authority: JP
Priority date: 1990-07-24
Filing date: 1990-07-24
Publication date: 1992-03-26

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すメカニカルシ
ールの要部半裁断面図、第２図は同じく回転環の
部分正面図、第３図は同じ固定環の部分正面図、
第４図は従来のメカニカルシールを装着したウオ
ーターポンプ全体の断面図である。１……ポンプハウジング、２……シヤフト、４
……インペラー、２０……メカニカルシール、２
２……回転環、２２Ｓ，２６Ｓ……摺動面、２５
……バネ、２６……固定環、２７……スパイラル
溝、２８……環状溝、２９……吸入孔、３０……
半透膜。 Fig. 1 is a half-cut sectional view of the main part of a mechanical seal showing an embodiment of the present invention, Fig. 2 is a partial front view of the same rotating ring, and Fig. 3 is a partial front view of the same fixed ring.
FIG. 4 is a sectional view of the entire water pump equipped with a conventional mechanical seal. 1...Pump housing, 2...Shaft, 4
... Impeller, 20 ... Mechanical seal, 2
2...Rotating ring, 22S, 26S...Sliding surface, 25
... Spring, 26 ... Fixed ring, 27 ... Spiral groove, 28 ... Annular groove, 29 ... Suction hole, 30 ...
Semipermeable membrane.

Claims

[Scope of utility model registration request]

A rotating ring that is rotatably inserted into the pump housing and tightly fitted to the shaft side that drives the impeller, and a rotating ring that is airtightly supported on the inner periphery of the housing and is biased in the axial direction by a spring and slides into contact with the rotating ring. A mechanical seal having a fixed ring, a spiral groove formed on the outer periphery of the sliding surface of the rotating ring to generate centrifugal pump pressure toward the outer diameter side, and a spiral groove formed on the outer periphery of the sliding surface of the rotating ring or the fixed ring, An annular groove formed at a position corresponding to the inner diameter end of the spiral groove, a suction hole whose outer end opens to the outer periphery of the fixed ring and whose inner end opens toward the annular groove, and a suction hole that is sealed to this suction hole and contains only water. A mechanical seal for a water pump characterized by comprising a semipermeable membrane that transmits water.