JPS55155961A - Shaft sealing device - Google Patents
Shaft sealing deviceInfo
- Publication number
- JPS55155961A JPS55155961A JP6438479A JP6438479A JPS55155961A JP S55155961 A JPS55155961 A JP S55155961A JP 6438479 A JP6438479 A JP 6438479A JP 6438479 A JP6438479 A JP 6438479A JP S55155961 A JPS55155961 A JP S55155961A
- Authority
- JP
- Japan
- Prior art keywords
- seal
- groove
- screw
- liquid
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To provide a rotary shaft sealing device having stable performance and free from seal breakdown without increasing the seal length by varying the axial depth of the screw seal groove in the axial direction in the liquid seal of shaft.
CONSTITUTION: A screw groove 4c cut in the outer periphery of a supply and exhaust pipe 4 in the direction opposite to the direction of rotation has a reducing depth toward the low pressure side. The seal is effected by making the use of pumping effect provided between stationary surface 85 and screw groove 4c. The depth of the groove is set such that the radius of the groove bottom is equal to or greater than the radius of the gas-liquid boundary which is related to the water pressure on the stationary wall surface at the rated rpm. Thus, the gas-liquid boundary is not produced within the screw groove, and the seal breakdown can be prevented without need for increasing the seal length beyond the required length. Also, without the gas-liquid boundary formed in the screw groove and with the liquid always in contact with the groove bottom, the pumping effect can be improved, and the length required for the screw seal can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6438479A JPS55155961A (en) | 1979-05-22 | 1979-05-22 | Shaft sealing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6438479A JPS55155961A (en) | 1979-05-22 | 1979-05-22 | Shaft sealing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55155961A true JPS55155961A (en) | 1980-12-04 |
Family
ID=13256755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6438479A Pending JPS55155961A (en) | 1979-05-22 | 1979-05-22 | Shaft sealing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55155961A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017010146A1 (en) * | 2015-07-10 | 2017-01-19 | 株式会社荏原製作所 | Non-contact annular seal and rotary machine provided therewith |
WO2017013922A1 (en) * | 2015-07-17 | 2017-01-26 | 株式会社荏原製作所 | Non-contact annular seal and rotary machine provided with same |
-
1979
- 1979-05-22 JP JP6438479A patent/JPS55155961A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017010146A1 (en) * | 2015-07-10 | 2017-01-19 | 株式会社荏原製作所 | Non-contact annular seal and rotary machine provided therewith |
CN107850220A (en) * | 2015-07-10 | 2018-03-27 | 株式会社荏原制作所 | Non-contact annular seal and the rotating machinery for possessing the seal |
WO2017013922A1 (en) * | 2015-07-17 | 2017-01-26 | 株式会社荏原製作所 | Non-contact annular seal and rotary machine provided with same |
CN107850221A (en) * | 2015-07-17 | 2018-03-27 | 株式会社荏原制作所 | Non-contact annular seal and the rotating machinery for possessing the non-contact annular seal |
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