Lựa chọn một số thông số kết cấu có ảnh hưởng đến hiệu suất và khả năng chống xâm thực của bơm hướng

NGHliN CUTU-TRAO Ddi

Ll/A CHQN MOT SO THONG SO KET CAU CO ANH HlTOTNG DEN HIEU SUAT

VA KHA NANC CHONG XAM THU'C CUA BaM HU^C^NG TRUC

SELECTION OF STRUCTURAL PARAMETERS EFFECTED ON PERFORMANCE AND CAVITA￾TION RESISTANCE OF AXIAL PUMP

TS. Ph^m Van Thu, TS. Dinh Anh TaSin

Vien Bcfm va Thilt bi Thu^ Itfi.

TOM TAT

Bdm hudng true dddc sd dung rdng rdi trong mgi linh vUc cua nin kinh ti, nhdt Id vdn di tudi tiiu

thuf l0i. Khi tinh todn thiit ki, cd nhiiu thdng s6 quyit dinh chdt lUdng cda bd cdnh vd cdnh hUdng bdm.

Tuy nhiin, cdc thdng s6 ndy tuy vdo ndng lUc vd kinh nghiim cua ngddi thiit ki thudng dUdc Ida chgn

khdc nhau. Sau ddy Id mdt s6 ldu f khi tinh todn lUa chgn ba bd thdng so diinh ciia bdm hUdng true cdt

nude thdp: nD;^:L/T.

Tif kh6a: Bdm hudng true, mdy ddng ldc.

ABSTRACT

Axial pump is widely used in all fields ofthe economy, especially in irrigation and drainage. When

calculating design there are many parameters to determine the quality ofthe impeller and impeller-axis

direction. However, these parameters are depended on ability and experience of the designer that often

choosen different. The following are some notes when calculating selected three parameters of the axial

pump of low water column: nD;"; L/T.

Keywords: Axial pump, dynamic machine.

DJ^T VAN DE cho thay cac gam ham hudng true d\iac Liln

X6 triiofc ddy nghien ciiu phu day cdc vung I^m

Bom hudng tryc la bdm trong do dong vile cua cgt nii6c H tii 2,5m din 20m v^ liiu

chiy chuyen dpng qua phan din dong theo Iii^ng Q tif 1.800 mVh den 100.000 m'/h. Cac

phiiong hiidfng tr\ic. bom nky diipc nghiin cilu cho vile v^n chuyin

niidc dilu hoa cac Iiiu viic s6ng ldn, bom tudi

Bdm hudng tryc dUdc sit dung rpng tilu thuy ldi va diiOc cong bo g6m 4 loai: O;

rai trong mgi linh vUc cua nin kinh tl, hinh 1 OLI; BII va IIpB. ^

T ^ P CHf CO KHl VI£T NAM • S6 6 (Tiidng 6 nam 2013) ^ 9