Cơ sở lựa chọn và tính toán thiết kế mô hình tua bin hướng chéo công suất vừa và nhỏ

Tuyin tap Cdng trinh Hdi nghi Khoa hpc

Cahpc Thiiy khi Todn qudc, Phan Thiet, 2008 269

I

\ Co' so lu-a chon va tinh toan thiet ke mo hinh tua bin

hu-dng cheo cong suat vira va nho

Le Danh Lien', Pham Phiic Yen^

Tn rang DHBK Hd ndi,

Vien Khoa hoc Thiiy lai Quoc gia

Tdm tdt: Tua bin thiiy luc hudng cheo Id logl chuyen tiip giiia tua bin tdm true vd

hirimg true. Logl thiet bi ndy d trong nude chua che tgo vd hdu nhu chua dugc su

dung. Nd cd nhieu uu diem nhirng cimg cd nhieu dgc thii cdn nghien cuu vd cai tien

cho phii hgp viri dieu kien irng dimg cho cdc tram thiiy dien vira vd nhd.

Trong bdi ndy giai thieu ca sd lira chgn vd tinh todn thiet ke md hinh tua bin hudng

cheo de xdy dung dugc mgt md hinh thiet bi phu hirp cho dieu kien ung dung cu the d

nirdc ta.

Abstract: A diagonal turbine is laying same where In benveen a Centrofugal and an

axial turbines. This type of turbine has not been fabricated and used In VIelnam sofar.

Diagonal turbine has many advantages but it's selection and design must be followed

a special way to make it usable more efficiently.

This paper describes criteria for selection and design if the turbine model, such that

the design condition wis close to the real application in our coiintiy

\. Co" sd lu-a chon mo hinh tua bin hu-ffng cheo cong suat vua va nho.

Tua bin hudng cheo Id loai chuyen tiep giira tua bin tam true vd hudng trye. Nd dugc

sir dyng cho pham vi cot nude tir 25 den 200m, Trong pham vi cot nude nhu vay neu diing

tua bin hudng cheo ta se cd lai ve mat hieu sudt, Tua bin hudng cheo cd the sir dyng thay

the tua bin hudng trye khi cdt nude thdp vd thay the cho tua bin lam trye khi cot nude cao.

Tuy nhien tua bin hudng chc^o cd cdc ddc thu rieng ve mat ket cdu nen viec che tao ddi hdi

do chinh xdc rdt cao. Tua bin hucrng cheo thudng dugc che tao dang cdnh xoay vd bd tri

dimg. Do kit cau nhu vay nen de tua bin lam viec binh thudng ddi hoi phai khdng che kich

thudc dgc trye mgt each rat nghiem ngat.

Trong dilu kien cdng nghe chi tao d nude ta, de cd the su dung rgng tai dang tua bin

hudng cheo cho cac tram thuy dien cdng suat vira vd nhd cdn cd cac cai tien ve mat ket cau

de tao ra cac tua bin hudng cheo vdn dam bdo bieu sudt cao nhung che tao de dang ban,

kinh te ban.

Tua bin hudng cheo cdng sudt Idn trude day theo truyin thdng dugc che tao dudi d^ng

cdnh xoay. Do vay bl mat bdu cdnh va budng bdnh cdng tdc phdi che tao dudi dang hinh

cdu, cdnh cdng tdc khong cd dTa ngodi. Viec chi tao bdnh cdng tdc nhu vay rdt phiic tap, ddi

hdi do chinh xac chi tao rat cao. Bk khdc phuc cac khd khdn dd chung tdi dy kien dua vao

cac: cai tiln dl tao ra loai bdnh cdng tdc mdi ung dung cho loai tua bin hirdng cheo cdng

suat vira va nhd.

Doi vdi eac tua bin hudng cheo cdng sudt vira vd nhd, vdn de dieu chinh cdng suat

trong qua trinh lam viec bdng each xoay canh dl bd tri cdnh dudi cdc gdc ddt cdnh khac