Title:
MECHANICAL SEAL
Document Type and Number:
Japanese Patent JP2018179093
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To cool contact portions of both sealing rings without the necessity of a supply source and the supply equipment of a cooling fluid.SOLUTION: A rotating sealing ring 6 arranged at a rotating shaft 4 comprises a main body part 9, and a sealing end face forming part 10 which protrudes from a tip face 9a of the main body part 9 with an outside diameter set smaller than that of the main body part. An external peripheral side fluid region L and an internal peripheral side fluid region H of contact portions 3b, 6a are blocked and sealed by the relative rotation of the contact portions 3b, 6a contacting with the sealing end face forming part 10 and a stationary sealing ring 3 arranged in a seal case 2. A cooling passage 16 penetrating an outlet part 16b which is opened in the vicinity of the sealing end face forming part 10 at a tip face 9b from an inlet part 16a which is opened at an external peripheral face 9a is formed at the main body part 9 of the rotating sealing ring 6, and a fluid in the external peripheral side fluid region L is discharged toward the contact portions 3b, 6a from the outlet part 16b of the cooling passage 16 accompanied by the rotation of the rotating sealing ring 6.SELECTED DRAWING: Figure 1
Inventors:
SHIMIZU TAKAYUKI
OGA MITSUHARU
OGA MITSUHARU
Application Number:
JP2017077253A
Publication Date:
November 15, 2018
Filing Date:
April 10, 2017
Export Citation:
Assignee:
NIPPON PILLAR PACKING
International Classes:
F16J15/34
Domestic Patent References:
| JPH0365065U | 1991-06-25 | |||
| JPS4314769B1 | ||||
| JPS59231269A | 1984-12-25 |
Attorney, Agent or Firm:
Hisami Miki