Title:
ROTARY JOINT WITH LONG ROTARY FLOW PASSAGE
Document Type and Number:
Japanese Patent JP3929227
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide technology for always normally operating a long screw shaft, possibly causing severe heat generation, independently of the length and rotating speed thereof, and cooling it in a long-time stable manner.
SOLUTION: This rotary joint for collecting a cooling water W supplied to a corner end 10 of a long flow passage 9 in a screw shaft 6 comprises a long insert pipe 4 having an outer diameter smaller than the diameters of holes in seal rings 21, 22 and the inner diameter of the flow passage 9 in the screw shaft 6, inserted from a sealing hole to the corner end 10 of the screw shaft flow passage, in the state of being inserted through the seal rings 21, 22. The long insert pipe 4 is supported rotatably following the screw shaft 6, with the rear end communicating with a second external connection port 13 opened in a casing 1. A second sealing portion 5 is arranged between a first external connection port 12 communicated with the screw shaft flow passage 9 and the second connection port 13.
Inventors:
Mitsuaki Ikeda
Application Number:
JP2000094730A
Publication Date:
June 13, 2007
Filing Date:
March 30, 2000
Export Citation:
Assignee:
RIX Corporation
International Classes:
F16L39/04; (IPC1-7): F16L39/04
Domestic Patent References:
| JP63185983U | ||||
| JP4083753U | ||||
| JP10235833A | ||||
| JP6027138U | ||||
| JP47005842Y1 |
Attorney, Agent or Firm:
Masamichi Ayata