JPS57206799A - Volute pump - Google Patents

Volute pump

Info

Publication number
JPS57206799A
JPS57206799A JP8952681A JP8952681A JPS57206799A JP S57206799 A JPS57206799 A JP S57206799A JP 8952681 A JP8952681 A JP 8952681A JP 8952681 A JP8952681 A JP 8952681A JP S57206799 A JPS57206799 A JP S57206799A
Authority
JP
Japan
Prior art keywords
tongue
vane
outlet end
inner casing
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
JP8952681A
Other languages
Japanese (ja)
Inventor
Takehiko Komatsu
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 JP8952681A priority Critical patent/JPS57206799A/en
Publication of JPS57206799A publication Critical patent/JPS57206799A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062—Details, component parts
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/422—Discharge tongues
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To damp pulsations by calculating from a specific equation an angle between the outlet end of a vane and the tongue of an inner casing when the outlet end of another vane crosses the tongue of an outer casing and setting it so that both pulsating pressure waves in an opposite phase interferes with each other. CONSTITUTION:When the outlet end of a vane crosses the tongue A of an outer casing 1, the angle (rad) between the outlet end of other vane and tongue B of an inner casing 3 is expressed by an equation; 2pi/Z(n+1/2)+piN/30a.l where, Z: number of vane N: speed of an impeller 2 (rpm) a: pressure wave propagation speed (m/s) l: distance from the tongue B of the inner casing 3 to the intermediate position of an inlet of the pump discharge port 1a n: 0, + or -1, + or -2.... Thereby, two pulsating pressure waves opposite in direction each other are generated, and the pulsations can be damped by mutual interference resulting in a reduction of noises.
JP8952681A 1981-06-12 1981-06-12 Volute pump Pending JPS57206799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8952681A JPS57206799A (en) 1981-06-12 1981-06-12 Volute pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8952681A JPS57206799A (en) 1981-06-12 1981-06-12 Volute pump

Publications (1)

Publication Number Publication Date
JPS57206799A true JPS57206799A (en) 1982-12-18

Family

ID=13973243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8952681A Pending JPS57206799A (en) 1981-06-12 1981-06-12 Volute pump

Country Status (1)

Country Link
JP (1) JPS57206799A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2524315A (en) * 2014-03-20 2015-09-23 Johnston Sweepers Ltd Centrifugal fan assembly for road sweeping machines
CN111852912A (en) * 2020-07-17 2020-10-30 青岛海信日立空调系统有限公司 Fan coil
WO2020233471A1 (en) * 2019-05-23 2020-11-26 青岛海尔滚筒洗衣机有限公司 Centrifugal fan and clothing dryer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2524315A (en) * 2014-03-20 2015-09-23 Johnston Sweepers Ltd Centrifugal fan assembly for road sweeping machines
GB2524315B (en) * 2014-03-20 2017-10-11 Johnston Sweepers Ltd A road cleaning vehicle comprising a debris collection arrangement
US10502225B2 (en) 2014-03-20 2019-12-10 Johnston Sweepers Limited Centrifugal fan assembly for road sweeping machines
WO2020233471A1 (en) * 2019-05-23 2020-11-26 青岛海尔滚筒洗衣机有限公司 Centrifugal fan and clothing dryer
CN111852912A (en) * 2020-07-17 2020-10-30 青岛海信日立空调系统有限公司 Fan coil
CN111852912B (en) * 2020-07-17 2021-12-07 青岛海信日立空调系统有限公司 Fan coil

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