JPS57163200A - Multi-blade fan - Google Patents

Multi-blade fan

Info

Publication number
JPS57163200A
JPS57163200A JP56049939A JP4993981A JPS57163200A JP S57163200 A JPS57163200 A JP S57163200A JP 56049939 A JP56049939 A JP 56049939A JP 4993981 A JP4993981 A JP 4993981A JP S57163200 A JPS57163200 A JP S57163200A
Authority
JP
Japan
Prior art keywords
blade
leading edge
pressure surface
fan
inlet angle
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
JP56049939A
Other languages
Japanese (ja)
Inventor
Koji Kubo
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.)
Denso Corp
Original Assignee
NipponDenso Co 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP56049939A priority Critical patent/JPS57163200A/en
Publication of JPS57163200A publication Critical patent/JPS57163200A/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes

Landscapes

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

Abstract

PURPOSE:To raise the efficiency of operation of a multi-blade fan and to reduce the sound generated by the fan, by minimizing separation of air flow by shaping a blade to have an arcuate cross section, and reducing the thickness of the blade by forming the leading edge of the blade such that its inlet angle on the side of low-pressure surface is nearer to the tangential angle than that of the blade on the side on the side of high-pressure surface. CONSTITUTION:The body 5 of a blade is formed as a whole to have a substantially arcuate cross section, and its leading edge 12 is shaped in the form of a knife edge by reducing the thickness of the leading edge, that is, by bringing the inlet angle of the leading edge 12 on the side of its low-pressure surface 13 nearer to the tangential direction than that on the side of high-pressure surface 14 by cutting off the low-pressure surface 13, i.e., the back surface of the leading edge 12 in respect of rotation of the blade. By thus bringing the inlet angle of the leading edge 12 of the blade 3 near to the tangential angle, deviation between the inlet angle of the blade on the side of low-pressure surface 13 and the inlet angle of air can be reduced. Therefore, it is enabled to raise the efficiency of operation of a multi-blade fan and to lower the sound generated by the fan.
JP56049939A 1981-04-02 1981-04-02 Multi-blade fan Pending JPS57163200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56049939A JPS57163200A (en) 1981-04-02 1981-04-02 Multi-blade fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56049939A JPS57163200A (en) 1981-04-02 1981-04-02 Multi-blade fan

Publications (1)

Publication Number Publication Date
JPS57163200A true JPS57163200A (en) 1982-10-07

Family

ID=12844992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56049939A Pending JPS57163200A (en) 1981-04-02 1981-04-02 Multi-blade fan

Country Status (1)

Country Link
JP (1) JPS57163200A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108443182A (en) * 2018-04-28 2018-08-24 北京中科寒武纪科技有限公司 Turbofan
CN111699323A (en) * 2018-06-11 2020-09-22 三菱重工发动机和增压器株式会社 Rotating blade and centrifugal compressor provided with same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108443182A (en) * 2018-04-28 2018-08-24 北京中科寒武纪科技有限公司 Turbofan
CN108443182B (en) * 2018-04-28 2024-05-03 中科寒武纪科技股份有限公司 Turbofan
CN111699323A (en) * 2018-06-11 2020-09-22 三菱重工发动机和增压器株式会社 Rotating blade and centrifugal compressor provided with same
CN111699323B (en) * 2018-06-11 2021-12-21 三菱重工发动机和增压器株式会社 Rotating blade and centrifugal compressor provided with same
US11384774B2 (en) 2018-06-11 2022-07-12 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Rotor and centrifugal compressor including the same

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