JPS5638597A - Multistage axial blower - Google Patents

Multistage axial blower

Info

Publication number
JPS5638597A
JPS5638597A JP11290479A JP11290479A JPS5638597A JP S5638597 A JPS5638597 A JP S5638597A JP 11290479 A JP11290479 A JP 11290479A JP 11290479 A JP11290479 A JP 11290479A JP S5638597 A JPS5638597 A JP S5638597A
Authority
JP
Japan
Prior art keywords
level
blade wheel
blade
flow rate
instability
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
Application number
JP11290479A
Other languages
Japanese (ja)
Inventor
Sueo Kawai
Shingo Ishizawa
Hiroo Onishi
Isao Tsuji
Kotaro Naya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11290479A priority Critical patent/JPS5638597A/en
Publication of JPS5638597A publication Critical patent/JPS5638597A/en
Pending legal-status Critical Current

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

PURPOSE: To prevent the occurrence of noises and broaden the range of flow rate applied by a method wherein the flow rate at the starting point of hydromechanical instability of blade wheels at the 2nd level and after is set apart from that of the preceding stage by a certain quantity.
CONSTITUTION: The flow rate at the starting point of hydromechanical instability of a blade wheel 2 at the 2nd level is set apart from that of the blade wheel 1 at the 1st level by 10% or more. For instance, as the blade wheel 1 at the 1st level, the type of a blade which has a large curvature and a large lift coefficient is used, while, as the blade wheel 2 at the 2nd level, such a type of a blade that has a small curvature and a small lift coefficiency is used, and thus the starting point of instability of the blade wheel at the 1st level is transferred to the point of lower flow rate than that of the blade wheel at the 2nd level. In this way, the vibration stress of the blade wheel at the 2nd level lowers by about 60%, while the reliability in strength of the blade wheel is rasied to a great extent, the level of noise is lowered, and accordingly, the expansion of the range of the flow rate applied becomes possible.
COPYRIGHT: (C)1981,JPO&Japio
JP11290479A 1979-09-05 1979-09-05 Multistage axial blower Pending JPS5638597A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11290479A JPS5638597A (en) 1979-09-05 1979-09-05 Multistage axial blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11290479A JPS5638597A (en) 1979-09-05 1979-09-05 Multistage axial blower

Publications (1)

Publication Number Publication Date
JPS5638597A true JPS5638597A (en) 1981-04-13

Family

ID=14598400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11290479A Pending JPS5638597A (en) 1979-09-05 1979-09-05 Multistage axial blower

Country Status (1)

Country Link
JP (1) JPS5638597A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4832566A (en) * 1988-02-04 1989-05-23 Westinghouse Electric Corp. Axial flow elastic fluid turbine with inlet sleeve vibration inhibitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4832566A (en) * 1988-02-04 1989-05-23 Westinghouse Electric Corp. Axial flow elastic fluid turbine with inlet sleeve vibration inhibitor

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