JPS57191497A - Centrifugal fan - Google Patents

Centrifugal fan

Info

Publication number
JPS57191497A
JPS57191497A JP7659181A JP7659181A JPS57191497A JP S57191497 A JPS57191497 A JP S57191497A JP 7659181 A JP7659181 A JP 7659181A JP 7659181 A JP7659181 A JP 7659181A JP S57191497 A JPS57191497 A JP S57191497A
Authority
JP
Japan
Prior art keywords
fan
characteristic parameter
diffuser
stator blade
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
Application number
JP7659181A
Other languages
Japanese (ja)
Inventor
Yasushi Takasaki
Minoru Iwata
Takashi Yashiki
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 JP7659181A priority Critical patent/JPS57191497A/en
Publication of JPS57191497A publication Critical patent/JPS57191497A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/005—Varying behaviour or the very pump the pumps being of the circumferential flow type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To improve the performance of a fan, by enabling to set a characteristic parameter within a particular range, and disposing an air-capacity controlling means consisting of a movable stator blade at the portion of a diffuser having a length satisfying the characteristic parameter. CONSTITUTION:In case that the value of a characteristic parameter X obtained from a specific formula lines within the range of -0.6--0.4, the total-pressure efficiency of a fan is maximum and the level of noises produced by the fan is minimum. Here, providing that the length from a tongue portion 6 to the discharge port of a spiral casing is L, the characteristic parameter X is selected to take a value within the range of -0.6--0.4. At the same time, an air-capacity controlling means 13 consisting of a movable stator blade 14 is disposed at the portion 8 of a diffuser having a length L satisfying the characteristic parameter X. With such an arrangement, the performance of a fan can be improved by turning the stator blade 14 at the diffuser portion 8 as shown by an arrow in the drawing by turning a control shaft 18, and thereby changing the discharge area of the fan, thus controlling the air capacity efficiently.
JP7659181A 1981-05-22 1981-05-22 Centrifugal fan Pending JPS57191497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7659181A JPS57191497A (en) 1981-05-22 1981-05-22 Centrifugal fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7659181A JPS57191497A (en) 1981-05-22 1981-05-22 Centrifugal fan

Publications (1)

Publication Number Publication Date
JPS57191497A true JPS57191497A (en) 1982-11-25

Family

ID=13609544

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7659181A Pending JPS57191497A (en) 1981-05-22 1981-05-22 Centrifugal fan

Country Status (1)

Country Link
JP (1) JPS57191497A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0495698U (en) * 1991-01-21 1992-08-19
CN102200134A (en) * 2011-01-29 2011-09-28 林钧浩 Swirling air intake centrifugal fan
CN108019374A (en) * 2017-11-10 2018-05-11 江苏大学 A kind of centrifugal pump asymmetric impeller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0495698U (en) * 1991-01-21 1992-08-19
CN102200134A (en) * 2011-01-29 2011-09-28 林钧浩 Swirling air intake centrifugal fan
CN108019374A (en) * 2017-11-10 2018-05-11 江苏大学 A kind of centrifugal pump asymmetric impeller
CN108019374B (en) * 2017-11-10 2020-02-21 江苏大学 Asymmetric impeller for centrifugal pump

Similar Documents

Publication Publication Date Title
ES8105071A1 (en) Method and apparatus for surge detection and control in centrifugal gas compressors
SU889899A1 (en) Fan impeller
SE8505844L (en) SIDOKANALSFLEKT
JPS57191497A (en) Centrifugal fan
JPS54104007A (en) Diffuser for centrifugal compressor
JPS5377319A (en) Axial-flow fan
JPS5781191A (en) Method and device of improving characteristic of blower or the like
JPS52129004A (en) Multi-blade fun
JPS54105307A (en) Electric fan
JPS5749100A (en) Double suction type fan
JPS5718497A (en) Eddy flow fan
JPS5459605A (en) Blower
JPS5762996A (en) Voltex fan
GB1496781A (en) Peripheral toroidal blowers
JPS54105306A (en) Electric fan
JPS54114641A (en) Controller of speed of revolution of engine
JPS5683598A (en) Axial-flow fan
JPS56592A (en) Adjusting method of centrifugal pump ability
JPS52142313A (en) Voltex blower
JPS537805A (en) Multistage electric blower
JPS55123395A (en) Electric blower
JPS52153216A (en) Electric fan
JPS5517254A (en) Cooling air passage of electric motor
SU1663235A1 (en) Centrifugal fan
EP0099615A3 (en) Centrifugal fan with flow control