JPS5549598A - Structure for fixing impeller of centrifugal fan or the like - Google Patents
Structure for fixing impeller of centrifugal fan or the likeInfo
- Publication number
- JPS5549598A JPS5549598A JP12241178A JP12241178A JPS5549598A JP S5549598 A JPS5549598 A JP S5549598A JP 12241178 A JP12241178 A JP 12241178A JP 12241178 A JP12241178 A JP 12241178A JP S5549598 A JPS5549598 A JP S5549598A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- bolt
- centrifugal fan
- expansion
- straight portions
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
PURPOSE: To protect centrifugal fan or the like against vibration, by fixing an impeller to the rotor by use of speical bolts at more than three points spaced circumferentially of the impeller, in the manner that expansion of the impeller is allowed only in one direction and hysteresis is given to the expansion of impeller.
CONSTITUTION: Four bolt holes 4 are formed in impeller 1 at equal pitches aling the circular array around the center of rotation of impeller 1, and these bolt holes 4 are in a shape elongated radially of the impeller 1 and having straight portions 4a extending radially of impeller 1. A bolt 3 is extended through the elongated hole 4 and bolt hole 6 of rotor 2 in the manner that its straight portions 4a are held in contact with respective flat portions 3a of bolt 3, and then a nut 7 is threaded onto the bolt 3. Because of such an arrangement that flat portions 3a of special bolts 3 are held in contact with straight portions 4a of elongated holes 4, it is enabled to allow expansion of impeller 1 only in one direction, to accomplish accurate centering of impeller 1 and to protect the centrifugal fan or the like against vibration.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12241178A JPS5549598A (en) | 1978-10-04 | 1978-10-04 | Structure for fixing impeller of centrifugal fan or the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12241178A JPS5549598A (en) | 1978-10-04 | 1978-10-04 | Structure for fixing impeller of centrifugal fan or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5549598A true JPS5549598A (en) | 1980-04-10 |
Family
ID=14835134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12241178A Pending JPS5549598A (en) | 1978-10-04 | 1978-10-04 | Structure for fixing impeller of centrifugal fan or the like |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549598A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04103292U (en) * | 1991-01-28 | 1992-09-07 | 三菱重工業株式会社 | centrifugal fan |
-
1978
- 1978-10-04 JP JP12241178A patent/JPS5549598A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04103292U (en) * | 1991-01-28 | 1992-09-07 | 三菱重工業株式会社 | centrifugal fan |
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