Phương pháp động học nghiên cứu bơm nhiên liệu pittong động cơ tua bin khí

Tuyen tap Cdng trinh Hdi nghi Khoa hge

Cff hge Thiiy khi Todn qudc, Phan Thiit, 2008 447

Phuo'ng phap dong hoc nghien cuu bom nhien lieu pittong

dong CO tua bin khi

Nguyen Minh Xuan*", Hoang Xuan Hoa*^', Ta Van Nham'^>

(I) Hoc viin Ky thudt Qudn sir

(2) Hoc viin Phdng khdng - Khdng qudn

Tom tdt: Ngdy nay. cdc ddng ca tua bin khi hdng khdng dugc trang hi cdc logi bam

nhien lieu tu dgng dieu chinh. Mgt trong cdc logi bam thudng duac su dung Id bam

piton. Uu the cua bam nhien lieu hdng khdng Id cd dp sudt cao vd dn dinh luv luang

tdt. Nghien cim dgng hge bam pittong Id mgt bdi todn thiet thuc cdn dugc Idm ro

nhdm tdng them sir hieu biet ve khi tdi de su dung hieu qua. Tuy vay ddy Id mgt vdn de

phuc tgp cdn phai dugc ddnh gid ket hgp giira ly thuyet vd thuc nghiem. Vdn de dugc

van dung tinh todn cho bam IIP-A cua dgng ca cu the vd dua ra cdc nhdn xet cdn

thiit.

A kinetics method in study of fuel piston pump of

airturbin engine

Abstract: Today, modern airturbine engine has been installing fuel pumps with

mechanics of automatic control. One of them is piston pumps. Superiority of airengine

fuel piston pumps is hight pressure and stable flow very well. Study of kinetics is

pratical-minded problem that needs clearly to solve in order to increase pump's

awarenees of airengine to use. In practics this method of calculating taked no

dlffculty. Recomends were advanced by authors In calculation of paper from symple

fuel piston pump IIP-Z of airturbin engine.

1. Dat van de

Ddi vdi bam nhien lieu piton thi van de quan trgng phai xac djnh dugc luu lugng

trung binh va tue thdi cua bom, bao dam sy lam viec binh thudng ciia dgng ca tuabin kbi.

Mat khac tu gdc do khai thac va thiet ke thi hanh trinh va sd lugng cac pittong can d mirc

do vua phai de bao dam dao dgng luu lugng la nho nhat.

2. Noi dung

2.1. Nghien cu-u sff do dgng hge cua bfftn

Trong nghien cuu khao sat, sa dd dgng hge dugc xay dyng tren co sd kel cau thyc cua

bam pittong cd ty dgng dilu chinh ciia he thdng nhien lieu dgng ca tua bin khi, (hinh 1).

Viec ty dgng dilu chinh ap suit tren bom thyc hien bang thay ddi gdc nghieng cua dTa

tya cac diu pittong (dTa nghieng) lam thay ddi hanh trinh cua cac pittong (theo tin hieu ap

suit sau bom); tir dd thay ddi luu lugng va ap suat tren bom, [1].

Tren hinh 1: 1-Id xo con trugt bg dilu chinh vdng quay; 2-con trugt bg dieu chinh

vdng quay; 3-con lie ly tam; 4-ld xo dinh hudng; 5-ld xo; 6-pittdng; 6'-dTa phan dau; 7-

roto; 8- dTa nghieng; 9-6 bi; 10-dem bit kin; 11 - true truyen dgng gan vdi true dong co; 12 -

khdp ndi true; 13 - true bg dilu chinh vong quay; 14-tay ga; 15-con trugt 16-pitt6ng trg

dgng; 17- tai co djnh; 18 - vd d bi; 19 - chdt chan nhien lieu tdi cac vdi phun va cho phep