NGHIEN Ciru HE THONG TIT DONG VE DAC TINH

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NGHIEN CUfU-TRAO D 6 |

• • • •

MAY B O M LY TAM TRONG PHONG THI NGHIEM

REASEARCH OF BUILDING UP CHARACTERISTIC-AUTODRAWING SYSTEM APPLIED FOR CENTRIFUGAL PUMPS IN LABORATORY

TS. Nguyen Chi Tinh', ThS. Dang Ngoc Thom^ ThS. Vo Thi Cam Thiiy^

'Truong Dai hgc Mo Dia chat

^Trung tam Th6ng tin Du lieu Biln va Hai dao. Ting cue Biln va Hai dao Viet Nam

^Truang Dai hgc Cong nghiep Ha Ngi

TOM TAT

Cdc mdy bam li tdm cdng sudt lim dugc dimg nhieu trong c6ng tdc thodt nuac mo. Ndng lugng dien su diAng cho thodt nuac mo khi mire do xu6ng sau cua mo ngay cdng ddng ke. Trong tram bam mo vai c6ng sudt Ian da tien tai sir dung bien tdn trung dp, de sir diing t6t he truyen dong bien tdn - dong ca - bam cho phep ma rongphgm vi ldm viec vd ghep n6i he thong bam mot cdch t6t nhdt, cdn thiet xdy dung dugc dgc tinh bam vd mgng bdng thuc nghiem mot cdch nhanh nhdt vd chinh xdc. Bdi bdo ndy tdc gid giai thieu mot m6 hinh bao g6m cdu true phdn cimg ket hgp vai phdn mem tren PLC de dieu khien tu dong van dien khi nen de thay d6i do ma v6 cap, d6ng thai thay doi t6c do cua bam th6ng qua Men tdn. Tu dong lay vd xu ly dit lieu luu lugng vd cot dp de ve dgc tinh ca bdn cua bam vd mgng.

Tir khoa: Ddc tinh bam.

ABSTRACT

Large capacity centrifugal pumps (CPs) are used commonly in mines' drainage. The deeper the mines' level, the bigger the electrical energy used for mines' drainage. In pumping stations using large capacity CPs, many medium voltage inverters are utilized. The drive mechanisms containing inverter-pump motor systems are utilized very well. This allows mine corporations to not only extend pump s working range but also couple the pump system in the best way. This leads to the need of building up the CPs' characteristics as well as CPs systems fast and precisely. In this paper, a model containing CPs hardware structure and a PLC-based software programme is used for controlling electric-pneumatic valves automaticaly. The controlling allows valves to have their stepless aperture.

The model also shows up the CPs speed changing by utilizing inverters. The process of flow data retrieving and sampling is carried out automatically for forming up both CPs'basic characteristics and pumping network.

TAP CHI CO KHI VIET NAM, Sl 6 nam 2014

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1.DAT VAN DE 3. LUtJ DO T H U A T T O A N

^ Cac quan he: H=f,(Q), N=f,(Q),Ti=f3(Q) bieu thi dac tinh lam viec ciia bom. Cac quan he nay bieu diln dual dang phuang trinh ggi la phuang trinh dac tinh, bilu diln duoi dang d l thi ggi la duong dac tinh.

- Cac duong dac tinh dugc xay dung nen hi cac s6 lieu tinh toan dugc ggi la duong dac tinh tinh toan, neu dugc xay dung tir cac gia tri do dugc qua thi nghiem ggi la duong dac tinh thuc nghiem.

Trong ba duong dac tinh: Cot ap, c6ng suat, hieu suat, quan trgng hon ca la duong cot ap H = f(Q), no cho ta biet kha nang lam viec ciia bom, nen con co ten rieng la duong dac tinh co ban. Tu duong dac tinh co ban H = fj(Q), bang tinh toan co the suy ra cac duong dac tinh N = f/Q) va Tl = f3(Q).

De xac dinh tu dgng duong dac tinh co ban ciia bom bang thuc nghiem tac gia da xay dung mgt m6 hinh trong phong thi nghiem va tien hanh ve dac tinh ciia bom va mang th6ng qua bg dieu khien PLC ket n6i may tinh.

2. CAU TRUC PHAN ClTNG

c

Hinh 1.1: Cdc thiit biphan cimg ca bdn:

1) Van dien khi nen ma vd cdp, 2) B6 dieu khien PLC, 3) Biin tan, 4) Dong ca vd bam, cdm bien luu

lugng vd cot dp, 5) Be chua

c •>

4. CHUONG TRINH LAY VA Xf LY TIN HIEU TU DONG TREN PLC

Net\

LD

vork 1 SMO.l CALL SBRO R

R

QO.O, 1 MIO.0,4 Network 2 LD

0 0 0 0 0 0 AN AN

=

10.1 MIO.O 10.2 MlO.l 10.3 M10.2 QO.O

M10.3 10.4 QO.O Network 3 LD

0 0 AN AN AN AN

=

10.1 MIO.O M4.0

MlO.l M10.2 10.2 10.3 M4.0 Network 4 LD

0

10.2

MlO.l ^{^}

TAP CHI CO KHI VIET NAM. S6 6 nam 2014

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NGHIEN CUfU-TRAO D O I

O M2.0 AN MIO.O AN M10.2 AN 10.1 AN 10.3

= M2.0 Network 5 LD 10.3 0 M10.2 O M3.0 AN MIO.O AN MlO.l AN 10.1 AN 10.2

= M3.0 Network 6 LD SMO.O LPS

A M4.0

MOVW 32000, AQW4 LRD

A- M2.0

MOVW 24990, AQW4 LPP

A M3.0 : MOVW 18900,AQW4

Network 7 LD SMO.O

MOVW AIW2,VW0

CALLSBRl, VWO, 32000, 6400, 20.0, 0.0, VD2 MOVR VD2,VD4

*R 10.2, VD4 Network 8

LD QO.O AN T37 TON T37,100 Network 9

LD T37 LD CO ON QO.O CTU CO, 8 Network 10 LD SMO.O LPS

AW= C0,0

MOVW 6400, AQWO LRD

AW= CO, 1

MOVW 8000, AQ WO LRD

AW= CO, 2

MOVW 10000, AQWO LRD

AW= CO, 3

AW= CO, 4

AW= CO, 5

AW= CO, 6

MOVW 18000, AQWO LPP

AW= CO, 7

MOVW 20000, AQWO Network 11

; LD SMO.O

R MIO.O, 8Chuang hinh con xu ly do luu lugng bang bg dem t6c do cao

Network 1 LD SMO.O

MOVB 16#F8,SMB37 HDEF 0,0

MOVD 0,SMD38 MOVD 1000, SMD42 MOVB 100, SMB34 ATCH INTO, 10

ENI// CHUONG TRINH NGAT THOI GIAN DO LUU LUONG

Network 1 LD SMO.O

MOVD HC0,VD200 HSC 0

DTR VD200,VD200 MOVR VD200,VD204 /R 0.75, VD204

TAP CHI CO KHI VIET NAM, S6 6 nam 2014

www.cokhivietnam.vn

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5. THI NGHIEM LAY DlT LIEU VE DAC TINH

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- An niit t6c do 1 tren tii dien de bom ly tam chay vai t6c do cai truac trong chuong trinh la 50Hz. Chuong trinh se tu dgng chay va biln thi sl lieu len WINCC.

Cii 10s thi van dien khi nen se thay dii do ma mgt lin Urong ling tir 0% din 100%.

Trong rn6i Ian van ma chiing ta lay dugc mgt cap sl lieu Q -H Ghi sl lieu liy dugc vao bang de xu ly va ve d6 thi.

Lap lai cac buac tren vai 2 cap t6c do con lai (an cac niit tic do 2, tic do 3 tren hi dilu khiln).

r r \

S6 lieu lay qua cac Ian thi nghiem bang 1.1

Bdng 1.1: S6 lieu do dugc khi ddng co chay vai t6c do

f^SOHz

Do ma van (%) H(m) Q(lifmin)

0 10.3

0

11.76 9.1 5.33

26.47 7.9 9.33

41.18 6.9 13.33

55.88 6.3 14.67

70.58 6 16

85.29 5.7 17.33

100 5.4 18.67 f=40Hz

Do ma van (%) H(m) Q(lit/min)

0 7.1

0

11.76 6.2

4

26.47 5.9 9.3

41.18 5.3 10.67

55.88 5 13.33

70.58 4.8 14.67

85.29 4.5

16

100

f=30Hz

Do mo van (%) H(m) Q(lit/min)

0 4.5

0

11.76 4.1 2.67

26.47 3.8 6.67

41.18 3.5 9.33

55.88 3.2 10.67

70.58 85.29 100

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6. XU* LY SO LIEU VA VE TREN MATLAB

Biet rang do thi bieu dien moi quan he Q - H la mgt dudng cong bac 2 nen trUdc tien ta dung phan mem Matlab de xap xi boa so heu thu dugc.

Sii dung cau triic lenh trong Matlab nhU sau:

»q=[ma tran cac so lieu Q];

»h=[ma tran cac so lieu H];

»polyfit(q,h,2)

Ket qua thu dUgc se la he so cua mgt tam thiic bac 2 dac tmh ca ban dugc the hien tren hi-2. '

TAP CHI CO KHI VIET NAM, Sl 6 nam 2014

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NGHIEN CUfU-TRAO061

J/Bi r t c i M * * i "^

f . t r f f-r V t i e w l r t « e r t T o o l ' - ._^. - c J - ^ t * *-.. -••

1 4 1 2 1 0

2

0

<

....

O V ' ^ b r t o p W i n c l o v o l - l e l p

•32) - * _ ^< - ^ • [S3 ca K O

3 2 4 6 e 1 0 1 2 1-4 1 6 i e 2 0

Hinh 1.2: Ba duomg ddc tinh cua bam ly tdm ung voi ba cdp tdc do 7. KET LUAN

Voi m6 hinh vat ly cung voi cac cac cam bien t6i thieu ket hgp vai phan mem xu ly dir lieu tren PLC, bai bao da giai thieu mgt phuang phap tu dgng truy cap dir lieu, xay dung dugc duong dac tinh CO ban cua may bom c6 tinh den cac t6n that kh6ng do dugc ciia mang thoat nuac. Kiem tra bang cac thiet hi do cam tay da xac dinh dugc cac dir lieu hoan toan tin cay. Tuong tu, cac dac tinh khac ciing CO the xac dinh bang thuc nghiem va nhu vay tien toi se chgn dugc diem lam viec t6t nhat c6 the cho bom nang cao dugc kha nang tiet kiem nang lugng.

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Ngay nhan bai: 12/5/2014 Ngay phan bien: 08/6/2014 Tai lieu tham Idiao:

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[1]. Dr - Ing; Nguyin Doan Phuoc, Dr - Ing. Phan Xuan Minh: "Tu dgng hoa vin Simatic S7 - 200"

[2]. PGS, TS. Nguyen Diic Suong, TS. Vii Nam Ngan: "Gido trinh mdy thiiy khi nen"

[3]. ThS. Nguyen Van Giap; "Bdi gidng thiit bi khoan tham do"

[4]. Nguyin Hoang Hai, Nguyin Khic Kilm, Nguyen Trung Diing, Ha Trin Diic; "Lap trinh Matlab ddnh cho sinh vien khoi khoa hoc vd ky thuat"

mi

TAP CHI CO KHI VIET NAM, S6 6 nam 2014