JPS57206799A - Volute pump - Google Patents
Volute pumpInfo
- 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
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.
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)
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 |
-
1981
- 1981-06-12 JP JP8952681A patent/JPS57206799A/en active Pending
Cited By (6)
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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