Global Patent Index - EP 1029180 A1

EP 1029180 A1 2000-08-23 - SIDE CHANNEL CENTRIFUGAL PUMP

Title (en)

SIDE CHANNEL CENTRIFUGAL PUMP

Title (de)

SEITENKANALKREISELPUMPE

Title (fr)

POMPE A CANAL LATERAL ET FLUX CIRCONFERENTIEL

Publication

EP 1029180 A1 (DE)

Application

EP 97950152 A

Priority

EP 9706236 W

Abstract (en)

[origin: WO9924719A1] The invention relates to a side channel centrifugal pump with a housing forming a side channel (1). The housing surface adjacent to the side channel forms a front face (13) adjoining the impeller. The transition edge (2, 3, 7) between the side channel (1) and the front face (13) is rounded in the areas where it deviates from the circumferential direction. In the front plane, the blades (16) of the impeller have a predetermined web width in the circumferential direction. According to the invention, the radius (15) of the transition edge (7) is greater than 0.25 (sec/m) times the product of web width x blade speed where the impeller blades (16) exit from the front face (13, 14) and overlap into the area of the side channel (1). This reduces cavitation tilting and noise.

IPC 1-7 (main, further and additional classification)

F04D 5/00

IPC 8 full level (invention and additional information)

F04D 5/00 (2006.01)

CPC (invention and additional information)

F04D 5/002 (2013.01); F04D 5/007 (2013.01); F05B 2250/503 (2013.01); F05B 2260/96 (2013.01)

Citation (search report)

See references of WO 9924719A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE

EPO simple patent family

WO 9924719 A1 19990520; AU 5320398 A 19990531; AU 738340 B2 20010913; CA 2306051 A1 19990520; CZ 20001268 A3 20011212; EP 1029180 A1 20000823; US 6296440 B1 20011002

INPADOC legal status


2003-12-10 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030602

2002-05-08 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020325

2000-08-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000211

2000-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE