EP 0787903 A2 19970806 - Regenerative pump having vanes and side channels particularly shaped to direct fluid flow
Title (en)
Regenerative pump having vanes and side channels particularly shaped to direct fluid flow
Title (de)
Seitenkanalpumpe mit speziell geformten Schaufeln und Seitenkanälen
Title (fr)
Pompe regénérative ayant des aubes et des canaux latéraux de forme particulière
Publication
Application
Priority
US 59661296 A 19960205
Abstract (en)
A regenerative or toric pump adds energy to a fluid using an impeller having an axis of rotation and axially spaced, radially extending first and second surfaces. A casing encloses the impeller and has a fluid inlet and a fluid outlet separated by a stripper. The casing has axially spaced, radially extending first and second sidewalls facing the first and second surfaces of the impeller respectively. Axially and radially extending blades or vanes are formed on an outer radial periphery of the impeller for driving fluid from the inlet toward the outlet as the impeller rotates about the axis of rotation. A fixed surface is formed in at least one sidewall of the casing for directing fluid back toward the impeller. Improved operating characteristics and extended range are accomplished through modification to the vane configuration of the impeller and/or by modification of the side channel configuration of the pump chamber in an asymmetrical fashion. The vanes can be modified to include a radially inward based portion extending in a generally trailing direction with respect to rotation of the impeller and a radially outward tip portion extending in a generally leading direction. The blades may also include a chamfered surface on the trailing edge of the base portion. The impeller chamber can be modified separately by expanding a side channel in the casing, or by insertion of a spacer between the side channel and the remaining portion of the casing defining the impeller chamber. <IMAGE>
IPC 1-7
IPC 8 full level
F04D 5/00 (2006.01); F04D 29/18 (2006.01)
CPC (source: EP)
F04D 5/002 (2013.01); F04D 29/188 (2013.01)
Citation (applicant)
- US 5302081 A 19940412 - SMITH JOHN E [US]
- US 5205707 A 19930427 - SMITH JOHN E [US], et al
- US 5163810 A 19921117 - SMITH JOHN E [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0787903 A2 19970806; EP 0787903 A3 19990210; EP 0787903 B1 20031203; CA 2194209 A1 19970806; DE 69726477 D1 20040115; DE 69726477 T2 20041028
DOCDB simple family (application)
EP 97101009 A 19970123; CA 2194209 A 19961231; DE 69726477 T 19970123