Tc Vn 86372011

TCVN 8637 : 2011 Xut bn ln 1

CNG TRNH THY LI - MY BM NC - YU CU K THUT LP T V NGHIM THU

Hydraulic structures - Water pumps - Technical requirements for installation and acceptance

H NI - 2011

TCVN TIU CHUN QUC GIA

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TCVN 8637 : 2011

Mc lc

Trang

Li ni u . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1 Phm vi p dng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Thut ng v nh ngha . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Lp k hoch v quy trnh lp t my bm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Kim tra, tip nhn mt bng v thit b trc khi lp t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.1 Yu cu chung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.2 Kim tra v tip nhn mt bng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.3 Kim tra v tip nhn thit b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Lp t my bm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 Yu cu chung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 K thut lp t my bm trc ngang . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.3 K thut lp t my bm trc ng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.4 K thut lp t my bm trc nghing (xin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6 Vn hnh th nghim. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.1 Yu cu chung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.2 Chun b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.3 Khi ng v dng t my . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.4 Chy th khng ti . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.5 Chy th c ti . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7 Nghim thu hon thnh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Ph lc A (Quy nh) : Mt s ch tiu k thut chnh khi lp t my bm . . . . . . . . . . . . . . . . . . . . . 20

Ph lc B (Tham kho) : S b tr lp t mt s b phn my bm v kim tra cht lng

lp t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

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TCVN 8637 : 2011

Li ni u

TCVN 8637 : 2011 Cng trnh thy li - My bm nc - Yu cu k thut lp t v nghim thu, c chuyn i t 14 TCN 07 : 2006: Cng trnh thy li

My bm nc - Lp t, nghim thu - Yu cu k thut, theo quy nh ti

khon 1 iu 69 ca Lut Tiu chun v Quy chun k thut v im a, khon

1 iu 7 ca Ngh nh s 127/2007/N-CP ngy 01 thng 8 nm 2007 ca

Chnh ph quy nh chi tit thi hnh mt s iu ca Lut Tiu chun v Quy

chun k thut.

TCVN 8637 : 2011 do Trung tm Khoa hc v Trin khai k thut thy li thuc trng i hc Thy li bin son, B Nng nghip v Pht trin nng

thn ngh, Tng cc Tiu chun o lng Cht lng thm nh, B Khoa

hc v Cng ngh cng b ti Quyt nh s 362/Q-BKHCN ngy 28 thng

02 nm 2011.

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TCVN 8637 : 2011

Cng trnh thy li - My bm nc - Yu cu k thut lp t v nghim thu

Hydraulic structures - Water pumps - Technical requirements

for installation and acceptance

1 Phm vi p dng

1.1 Tiu chun ny quy nh cc yu cu k thut lp t, chy th v nghim thu cc t my bm nc c in p lm vic di 500 V v cng sut t 200 kW tr xung thuc cng trnh thy li.

1.2 Tiu chun ny khng p dng cho cng tc lp t, chy th, nghim thu my bm chm, my bm kiu tuc bin, bm pittng, bm ging, bm xng du, bm bn ct v cc loi my bm c in

p lm vic trn 500 V, cng sut trn 200 kW.

1.3 Ngoi cc yu cu ca tiu chun ny cn phi tun theo cc yu cu c quy nh trong cc tiu chun k thut hin hnh c lin quan.

2 Thut ng v nh ngha

Tiu chun ny s dng cc thut ng v nh ngha sau:

2.1

T my bm (22TPumping set)

Mt t hp bao gm my bm v ng c dn ng my bm.

2.2

Lp rp (22TAssembly)

Qu trnh lin kt cc chi tit v b phn my bng bulng hoc cc lin kt khc to thnh t hp my

bo m chng hot ng chnh xc theo mt quy lut nh trc.

2.3

Lp t 22T(Installation)

Quy trnh ni kt cc my mc, thit b hay cc b phn my vo v tr mng my nh sn nhm

lm cho my hay t hp my hot ng n nh.

TIU CHUN QUC GIA TCVN 8637 : 2011

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TCVN 8637 : 2011

2.4

Cm chi tit (22TComponent)

Nhiu chi tit c lin kt vi nhau to thnh mt b phn my nht nh c th thc hin c

mt chc nng ca my.

2.5

Dng c lp t (Installing22T instruments)

Cng c dng tho, lp hoc iu chnh lin kt cc chi tit hay b phn my.

2.6

Dng c o (22TMeasuring tools)

Loi cng c trn c chia n v o, dng kim tra mt loi thng s k thut nht nh ca thit

b (nh kch thc, nhit , lu lng, p lc) trong qu trnh lp rp.

2.7

Sn bm (22TPump floor)

Mt bng cao trnh lp t my bm

2.8

Sn in 22T(Electrical floor)

Mt bng cao trnh lp t cc t in v h thng in iu khin my bm.

2.9

khng ng trc 22T(Uncoaxiality)22T

Khong cch khng trng nhau gia hai ng tm ca hai trc lp trn cng khp ni.

3 Lp k hoch v quy trnh lp t my bm

3.1 Trc khi tin hnh lp t my bm cn phi lp k hoch v quy trnh lp t, bao gm cc ni dung sau:

a) Tn d n, danh mc thit b, tin , a im d n, quy phm p dng v cc iu kin k thut

quy nh;

b) Biu tin thc hin;

c) Biu nhn lc;

d) Qun l an ton;

e) Qun l cht lng;

f) Cng trnh ph phc v lp t;

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TCVN 8637 : 2011

g) K hoch s dng thit b thi cng, dng c lp t v dng c o;

h) Bin php lp t;

i) Sn hon thin sau lp t;

k) Chy th my bm ti hin trng.

3.2 Quy trnh lp t my bm do nh thu thi cng lp tu thuc vo kiu loi v kch c my bm s c lp t.

4 Kim tra, tip nhn mt bng v thit b trc khi lp t

4.1 Yu cu chung

4.1.1 Ch u t phi cung cp cho nh thu thi cng lp t cc h s lin quan n qu trnh lp t c cp c thm quyn chp thun. H s bao gm:

a) Cc bn v xy dng c lin quan n lp t;

b) Cc bn v lp t my bm, cm chi tit, trng lng v kch thc ph b ca tng cm chi tit;

c) Ngi i din v gim st kim tra lp t;

d) Thi gian v tin lp t;

e) H s thng mi.

4.1.2 Sau khi tip nhn h s do ch u t cung cp, nh thu thi cng lp t my bm phi lp v thng qua ch u t bn quy trnh lp t. Ni dung ca quy trnh lp t bao gm:

a) Quy trnh lp t cho tng chi tit v tng th;

b) Bin php t chc thi cng: s dng ngun nng lng, b tr nhn lc v phng tin k thut,

phng php nng h v g lp phc v lp t;

c) Bin php m bo an ton lao ng v v sinh mi trng;

d) Thi gian v tin lp t ph hp vi yu cu ca ch u t.

4.2 Kim tra v tip nhn mt bng

4.2.1 Cc hng mc cng trnh chnh nh sn bm, sn in, nh trm, mng my, rnh t cp phi c hon thnh trc khi lp t my bm. Trong trng hp va xy c va lp t phi c s

thng nht v tin thi cng v bin php m bo an ton cho ngi v thit b.

4.2.2 Vic giao nhn mt bng, v tr lp t my bm do cc n v lin quan thc hin. Trong bin bn bn giao phi ghi r cc ni dung chnh gm:

a) Tim mc mt bng v v tr mng my;

b) Cao v chiu dy sn t my bm, sn in;

c) Kch thc h ch lp my;

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TCVN 8637 : 2011

d) S lng, khong cch v kch thc l bu lng mng;

e) Ngy b tng mng my.

4.2.3 Sai lch cho php ca cc ng tm mng b tng, khong cch tm cc l bu lng, cc kch thc trn mt phng ngang, cao mt b tng, kch thc ca l bu lng, khng thng ng l

bulng c quy nh bng A.1 ph lc A.

4.2.4 Sai lch cho php ca cc mng my lp t cc t my kiu trc ng nh sau:

a) i vi loi my bm hng trc trc ng: x dch ca tim ng ca mng my ng c in

v cc tim ng mng cc trc trung gian v ng ht khng c qu 10 mm.

b) i vi loi my bm ly tm trc ng: x dch tim ng ca mng my ng c in, mng my

cc trc trung gian v mng my bm khng c qu 10 mm.

4.2.5 Ch c php lp t cc t my bm khi b tng mng my t cng thit k.

4.3 Kim tra v tip nhn thit b

4.3.1 Kim tra thit b

4.3.1.1 Kim tra chung

Bao gm cc cng vic sau:

a) Tho b bao gi, lau sch du m bo qun;

b) Kim tra s ph hp ca thit b vi h s thit k:

- Ngun gc xut x ca thit b;

- Thng s trn nhn mc ca thit b;

- S lng: tng th, tng cm chi tit v chi tit ri i theo thit b so vi h s thng mi (bn k

ng b chi tit sn phm ni cung cp thit b);

- Thi gian xut xng, phiu kim nh cht lng hng ho hp l;

- Ti liu hng dn lp t v vn hnh;

- Kim tra b ngoi my (vt nt, vt lm v cc h hng khc).

4.3.1.2 Kim tra my bm


a) Kim tra s lng v cht lng cc bu lng , l bu lng trn u ni ng ht, u ni ng y;

b) Dng tay quay nh na khp ni trn trc, bnh xe cng tc phi quay trn;

c) i vi t my bm dng tho ri tng b phn ring bit, phi tin hnh kim tra tng b phn,

cc chi tit quay trong , cc chi tit khi lm vic c c xt. c bit kim tra k khe h gia bnh xe

cng tc v vng mn theo bng tr s cho php, quy nh trong bng A.7 v bng A.8 ph lc A.

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4.3.1.3 Kim tra ng c in


a) Kim tra cch in vi v;

b) Kim tra chiu quay ca ng c phi ph hp vi chiu quay ca my bm;

c) Kim tra m, nu ng c b m phi sy li trc khi lp;

d) Kim tra cc thit b in i km.

4.3.1.4 Kim tra khp ni trc


a) Kim tra lp cht cc na khp ni trc trn my bm v ng c in;

b) xin tm v di tm cho php khi cn chnh khp ni trc quy nh trong bng A.2 ph lc A.

4.3.1.5 Kim tra cc thit b ph

Cc thit b ph ca t my gm van mt chiu, van hai chiu, van y v ch bm, van an ton. Kim

tra ng m van, kha; s lng v ng knh cc l lp bu lng trn cc mt bch.

CH THCH:

1) Phi ghi vo bin bn cc kt qu kim tra;

2) Cc chi tit v b phn khng m bo yu cu k thut phi x l hoc thay th theo ng yu cu quy nh.

5 Lp t my bm

5.1 Yu cu chung

Ch c php tin hnh lp t my bm khi hon thnh cc cng tc chun b di y:

a) Nghin cu h s k thut c lin quan: cc bn v v k thut v xy dng, s , nn mng, lp

t, biu phn b, b tr t my;

b) Lp k hoch lp t v quy trnh lp t ph hp;

c) C mt bng lp rp iu kin k thut;

d) B tng mng my t cng thit k;

e) nh tm lp t.

5.2 K thut lp t my bm trc ngang

5.2.1 Lp t t my bm v ng c lp c nh trn khung b

5.2.1.1 a t my bm vo v tr lp t

Lm sch b mt nn. Qu trnh mc cp, cu v vn chuyn a t my bm vo v tr lp t phi

tun theo ch dn ca nh ch to. Nu t my tho ri bm v ng c th khi t ln b phi t my

bm trc, ng c in sau. Phi m bo ng ct trc bm nh trong thit k.

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5.2.1.2 Cn chnh t my bm ln th nht (cn chnh s b)

5.2.1.2.1 nh v t my bm bng cc tm m bng thp t gia nn mng v b my. Cc tm m phi c t c hai pha ca mi bu lng mng. S dng mt cp cc tm m hnh nm s

thun li cho vic iu chnh chnh xc.

5.2.1.2.2 Cn chnh tm ngang, tm dc v chiu cao ca t my bm m bo sai lch cho php khng vt qu quy nh trong cc bng ph lc A.

5.2.1.2.3 Cc tm m, tm nm cn chnh my phi ch to theo bn v hng dn ca nh ch to (nu c) hoc theo hnh B.1 ph lc B. S lng tm m, tm nm cn ti mt v tr cn m khng

c ln hn 3.

5.2.1.2.4 Cn chnh khng song song ca ming x (nu c) v khng vung gc ca ming ht;

5.2.1.2.5 Sai lch khi lp t t my bm khng vt qu tr s quy nh trong bng A.3 ph lc A.

5.2.1.3 b tng chn bu lng mng my

5.2.1.3.1 Lm sch bn trong cc l lp bu lng mng ri lm m bng nc. Ch bc bo v phn ren ca bu lng mng.

5.2.1.3.2 b tng chn bu lng mng my. B tng dng chn bu lng mng my phi c mc khng nh hn 300. Khi b tng phi c m cht.

5.2.1.3.3 Lm cht tm thi cc bu lng mng.

5.2.1.3.4 ng nh xc nhn kh nng vng chc ca mi tm m hnh vt.

5.2.1.4 Cn chnh t my bm ln 2

5.2.1.4.1 Cn chnh tm my bm v tm ng c in ti hai na khp ni trc vi 4 v tr cch nhau 90P0P, sai lch cho php quy nh trong bng A.3 v bng A.5 ph lc A.

5.2.1.4.2 Xit u v cht cc bu lng mng, bu lng chn bm, bu lng chn ng c, bu lng hm chng ni lng ai c.

5.2.1.5 Lp t ng ng

5.2.1.5.1 Ch c php lp cc ng ht, ng x vi my bm khi b tng chn bu lng mng my t cng thit k v sau khi xit cht bu lng mng c nh t my bm vi b my.

5.2.1.5.2 Trc khi lp ng ng ht, ng x phi lm sch bn trong ng v bn trong bung bm.

5.2.1.5.3 Nu ng knh ng ht, ng x ln hn ng knh ming ht, ming x my bm, cn phi c mt on ng hnh cn chuyn tip, gc cn khng ln hn 10P0P i vi ng x v 15P0P i vi

ng ht. Ti ng ht lm vic c chn khng, dng on ng chuyn tip hnh cn khng i xng.

trnh hnh thnh ti kh trong ng ng, khi lp cn lu mt nghing ca phn cn nm pha

di, t ng dc v pha my bm vi dc t 1/200 n 1/50, xem hnh B.3 ph lc B.

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5.2.1.5.4 Khi lp ng ng ht, ng x phi m bo cc yu cu sau:

a) S lng cc mi ni ghp v khuu cong l t nht;

b) Mt cc mi ni ghp phi kn, mt bch cc ng thng phi song song vi nhau v cc l bt bu

lng phi trng nhau;

c) Trong qu trnh lp phi k, ng ng m bo khi xit bu lng mi ni ng khng gh, ko

ming ht, ming x my bm;

d) Cc thit b lp trn ng ng nh cc khp lp rp, cc van phi trng thi lm vic n nh;

e) Kim tra li vic nh tm t my;

g) b tng chn ng ng ht v ng x theo bn v thit k cng trnh trm.

5.2.1.6 Lp giong lm kn kht p tp v khp lp rp

5.2.1.6.1 Kch thc v cht lng ca giong lm kn phi ph hp vi ch dn ca nh ch to.

5.2.1.6.2 Khi lp phi lp cc ch tip gip cc u vng giong lch nhau mt gc 120P0P. Khe h ch tip gip cc u ca vng giong t 3 mm n 5 mm.

5.2.1.6.3 Khi xit bch p phi xit u cc bn.

5.2.1.6.4 Xit cht ln cui khi th bm m bo lng nc r r cho php qua tp theo yu cu ca nh ch to. Khp lp rp khng c r r.

5.2.1.7 Lp h thng bi trn trc t my bm

Bi trn trc my bm trc ngang c th bng du hoc bng m. Chng loi v s lng ca cht

bi trn phi tun theo ch dn ca nh ch to.

5.2.1.8 Lp t h thng bm mi chn khng (nu c)

Thng thng t my bm chn khng mi bm trc ngang c cu to phn bm v ng c in

c cn chnh v lp c nh trn mt khung b . Lp t loi thit b ny theo ng quy nh

trong h s thit k.

5.2.2 Lp t my bm v ng c in cha lp trn khung b hoc c khung b ring

5.2.2.1 Lp t khung b t my bm

Thc hin theo trnh t sau:

a) Lm sch b mt nn;

b) a khung b vo v tr lp t;

c) Cn chnh khung b ;

d) Cn chnh tm ngang, tm dc;

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e) Cn chnh khng song song ca mt phng t bm v ng c in (i vi t my bm c

khung b bm v khung b ng c in ring);

f) Sai lch cho php lp khung b t my bm khng vt qu tr s quy nh trong bng A.4 ph

lc A;

g) Cc tm m, tm nm ca khung b thc hin theo quy nh ti 5.2.1.2.3;

h) b tng chn bu lng mng my thc hin theo quy nh ti 5.2.1.3.

5.2.2.2 Lp v cn chnh t my bm

Thc hin theo trnh t sau:

a) a u bm v ng c in vo v tr lp;

b) Lp v cn chnh ng trc ca ng c in v bm. Xit u v cht cc bu lng lin kt. Cn

chnh ng tm ca my bm v ng c in ti hai na khp ni trc 4 v tr cch nhau mt gc

90P0P. Tr s sai lch cho php ly theo bng A.5 ph lc A;

c) Cc bc tip theo thc hin theo cc quy nh t 5.2.1.4 n 5.2.1.8.

5.3 K thut lp t my bm trc ng

5.3.1 Yu cu k thut lp t my bm trc ng c trc trung gian, ng c in mt bch c ng knh nh v

5.3.1.1 Lp t t my bm c khung b

5.3.1.1.1 a khung b bm, khung b ng c vo v tr lp t v tin hnh cn chnh:

- Cn chnh cao gia hai mt khung b ;

- Cn chnh m bo ng tm gia khung b bm vi khung b ng c v ng ni tm

gia hai khu b phi vung gc vi mt phng ngang. x dch tm so vi thit k khng qu 5 mm,

chiu cao khng qu 10 mm v khng vung gc ca mt phng khung b khng ln hn 0,1 mm

trn 1 m.

5.3.1.1.2 b tng chn bu lng mng ln th nht c chiu cao bng 2/3 chiu cao khung b my. Yu cu k thut b tng chn thc hin theo quy nh ti 5.2.1.3. Sau 7 ngy kim tra v cn chnh

li tm, song song ca khung b , nu t yu cu th b tng chn nt phn cn li.

5.3.1.1.3 Lp t t my bm:

a) Xit cht bu lng mng ca khung b ;

b) Lm sch b mt lp ghp ca khung b bm, lp ging lm kn;

c) a cm u bm vo v tr lp. Bt cht u bm vo b ;

d) Cn chnh khung b bm m bo vung gc ca trc bm ti v tr khp ni trc;

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e) b tng gn khung b bm vi sn nh trm m bo mi ghp kn khng thm thu nc t

b ht ln sn nh trm bm.

5.3.1.1.5 a cm trc trung gian (trc truyn lc) vo v tr lp t. Cn chnh m bo ng trc ca trc bm v trc trung gian 4 v tr cch nhau 90 ti khp ni bm v trc trung gian.

5.3.1.1.6 Kim tra, cn chnh song song ca mt phng b ng c vi mt phng ngang. Sai lch cho php ly theo bng A.6 ph lc A.

5.3.1.1.7 Cc tm m, tm nm dng cn chnh my thc hin theo quy nh ti 5.2.1.2.3.

5.3.1.1.8 b tng chn khung b ng c: thc hin theo 5.2.1.3.

5.3.1.1.9 Lp t h thng ng ng x :

a) Ch lp ng ng x khi b tng chn bu lng mng v khung b t cng thit k;

b) Trc khi lp ng ng x phi lm v sinh sch bn trong ng v bn trong bung bm;

c) Nu ng knh ng x ln hn ng knh ming x ca bm, cn phi c mt on ng hnh cn

chuyn tip vi gc cn khng ln hn 10P0P;

d) Trong qu trnh lp ng ng x phi k ng ng n nh khng ph v cn chnh tm

ca t my v m bo cc yu cu sau:

- Mt cc mi ni ghp phi kn, mt bch cc ng thng phi song song vi nhau v cc l bt bu lng

phi trng nhau;

- Khi xit bu lng mi ni khng gh, ko ming x my bm;

- Van np ng x (clap) phi trng thi ng m n nh, lm vic v tr ri t do.

5.3.1.1.10 b tng chn ng ng x theo bn v thit k cng trnh trm.

5.3.1.1.11 Kim tra v cn chnh li ng tm, thng gc ca trc bm ti mt u khp ni trc trung gian, song song ca mt phng b ng c so vi mt nm ngang. Sai lch cho php quy

nh ti bng A.6 ph lc A.

5.3.1.1.12 a ng c in vo v tr lp, xit cht cc bu lng. Dng tay quay khp ni, nu trc bm v ng c quay nh khng c ting va chm l t yu cu.

5.3.1.1.13 Lp t h thng giong lm kn tp v giong lm kn khp lp rp. Yu cu k thut theo quy nh ti 5.2.1.6 .

5.3.1.1.14 Lp t h thng bi trn, lm mt trc cn m bo cc yu cu k thut sau:

a) Lng du, m hoc nc k thut cung cp cho vic bi trn, lm mt trc phi n nh v

theo yu cu ca nh ch to;

b) ng ng dn phi sch, khng c tr lc;

c) Cc mi ghp ni phi kn.

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5.3.1.2 Lp t t my bm khng c khung b

5.3.1.2.1 a cm u bm vo v tr lp t. Cn chnh m bo tm v tr t bm, cao t b pha di ln sn ng c, vung gc ca trc bm so vi mt phng ngang ti v tr khp ni bm

theo ng n thit k.

5.3.1.2.2 b tng chn bu lng mng : thc hin theo 5.2.1.3.

5.3.1.2.3 Kim tra li tm, vung gc ca tm trc t bm so vi mt phng ngang. Xit cht bu lng mng c nh u bm vi cng trnh trm.

5.3.1.2.4 a cm trc trung gian (cm truyn lc) vo v tr lp t.

5.3.1.2.5 Cc bc thi cng lp t tip theo thc hin theo cc quy nh t 5.3.1.1.5 n 5.3.1.1.14.

5.3.2 Yu cu k thut lp t my bm trc ng ng c kiu treo

5.3.2.1 Yu cu chung

Lp t vng t sn (ming ht) my bm trc khi b tng mng my. Yu cu k thut cc

bc thc hin v cn chnh theo quy nh ti 5.3.1.

5.3.2.2 Lp t b bm

5.3.2.2.1 a b bm vo v tr lp v tin hnh cn chnh:

a) Cn chnh i xng qua tm ming ht, sai s cho php nh hn 1,0 mm, m bo chiu cao ti

sn ng c sai lch cho php nh hn 10 mm;

b) Cn chnh vung gc mt phng qua hai mt b vi phng thng ng sai s cho php

khng qu 0,1 mm/m.

5.3.2.2.2 b tng chn bu lng mng v b ln th nht t 2/3 chiu cao thit k. Yu cu cht lng b tng theo quy nh ti 5.2.1.3. Sau 7 ngy kim tra v cn chnh li b , nu sai s nm

trong phm vi cho php th tip tc b tng chn hon chnh bu lng mng v b .

5.3.2.3 Lp t cm u bm

a cm u bm vo v tr lp. Cn chnh khng vung gc ca trc bm so vi mt u ca khp

ni trc. Cn chnh tm t bm so vi tm chun. Sai s cho php quy nh ti A.6 ph lc A.

5.3.2.4 Lp t ng c in vo my bm

Dng cu a ng c in vo v tr lp. Cn chnh s b ng tm gia trc bm v trc ng c

sai lch cho php v ng tm 0,10 mm, v vung gc ca mt ng c 0,10 mm/m.

5.3.2.5 Cn chnh tinh ton b t bm

5.3.2.5.1 Cn chnh stato ng c in m bo khng vung gc khng c vt qu 0,05 mm trn 1 m.

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5.3.2.5.2 Cn chnh khng vung gc ca trc ng c vi mt a ca a chn, sai lch cho php khng ln hn 0,02 mm/m.

5.3.2.5.3 Cn chnh lp kht ca khp ni trc bm v ng c. Khi nht cn l c chiu dy 0,03 mm vo gia hai mt u ca khp ni m bo chiu su nht khng c qu 10 mm .

5.3.2.5.4 o mt u khp ni ca ng c in khng c ln hn tr s ghi trong bn v thit k ca nh ch to. Khi khng c s liu , c th xc nh theo cng thc sau:

ngcp D

LK 102,0 (1)

trong :

KRcpR l o mt u khp ni cho php;

DRngR l ng knh ngoi ca a thp trc;

LR1R l khong cch t trc ti mt u khp ni.

5.3.2.5.5 Cn chnh ng tm ca trc bm theo trc ng c m bo o ca trc bm so vi trc ng c khng ln hn 0,05 mm trn 1 m.

5.3.2.5.6 Xit u, cht cc bu lng. Kim tra kh nng quay ca trc t my bng tay. Khoan, doa, lp cc cht nh v ca cc mi lp ghp.

5.3.2.6 Lp t cc ng ng x v cc thit b ph tr ca bm

Thc hin theo ch dn ca nh ch to hoc theo bn v thit k cng trnh trm, m bo cc yu

cu k thut quy nh t 5.2.1.5 n 5.2.1.8.

5.4 K thut lp t my bm trc nghing (trc xin)

5.4.1 Lp t my bm trc nghing, u bm v ng c in cng lp trn mt xe ko di ng

5.4.1.1 Lp t h thng ng ray ca xe ko bm

5.4.1.1.1 ng ray ca xe ko t my bm phi c lp t n nh v c nh trn cc trc bng b tng.

5.4.1.1.2 Sai s cho php khi lp t:

a) khng song song gia hai ng ray khng c ln hn 0,5 mm/m;

b) Chnh lch cao mt lm vic ca hai ng ray ti cng mt mt ct khng c qu 1,0 mm

so vi cao danh ngha;

c) mp m ca mi ni gia hai u ca mt ng ray khng ln hn 1 mm.

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5.4.1.1.3 Cc tm m, tm nm cn chnh ng ray phi ch to theo thit k ca nh sn xut (nu c) hoc theo hnh B.1 ph lc B. S lng tm m, tm nm cn ti mt v tr cn m khng

c ln hn 2. Khi cn xong phi xit cht bu lng c nh thanh ray vi tr .

5.4.1.1.4 b tng chn y cht gia thanh ray v tr . Mc b tng chn khng thp hn 300.

5.4.1.2 Lp t bm vo xe ko bm

Cn chnh ng tm gia trc bm v trc ng c theo quy nh ti 5.2.1.4.

5.4.1.3 Lp h thng ti ko xe ch t my bm

Ti ko bm khi lp xong ng tm tang cun cp phi vung gc vi tm ca ng ray v song

song vi mt phng ngang, sai lch cho php 0,5 mm trn mt mt di. Ti phi lm vic n nh, an

ton v c h thng phanh t hm. Cp ko xe ch bm khi lm vic khng c t, trt, tip xc vi

cc vt c nh.

5.4.1.4 Lp t h thng ng x

5.4.1.4.1 a xe ch bm xung c nh ti v tr lm vic thp nht theo thit k cng trnh trm (chiu cao ht thp nht) bt u lp ng ng x, sau ko ln v lp tip cho cc v tr khc

theo thit k ng ng x ca cng trnh trm. ng ng x lp ln lt t di thp ln cao.

5.4.1.4.2 Qu trnh p t ng ng ni ming x bm vi h thng ng ng x phi m bo yu cu sau:

a) Cc mi ghp phi kn, mt bch ca chi tit bt trn ming x bm phi song song vi mt bch ch

ca ng ng x, cc l bt bu lng phi trng nhau;

b) Trong qu trnh di chuyn xe ch bm trn ng ray, t my bm khng bi va qut vo cc u

mt bch ch ca ng ng x;

c) Khp lp rp, clap, van mt chiu (nu c) phi trng thi lm vic n nh.

5.4.1.4.3 Cc bc tip theo thc hin theo cc quy nh t 5.2.1.4 n 5.2.1.8.

5.4.2 Lp t my bm trc nghing c trc trung gian

5.4.2.1 Lp t h thng ng ray bm, h thng ng ng x thc hin theo 5.4.1.1 v 5.4.1.4.

5.4.2.2 Lp t cm u bm theo trnh t sau:

a) Dng cu a cm u bm vo ng ray ri di chuyn u bm xung v tr lp t ti b ht;

b) Cn chnh chiu cao tm bm so vi chiu cao thit k v tm trc bm theo tm ng ray. Cn

chnh m bo song song ca trc bm so vi mt phng ray vi sai lch khng qu 1 mm/m;

c) Xit cht u bm c nh vi ng ray.

5.4.2.3 Lp trc trung gian, bc trt, ng bao trc v ng x theo quy nh sau:

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a) Trnh t lp:

- Lp t ni trc bm v ming x bm cho n ng cui cng;

- Lp t chi tit bn trong ra chi tit bn ngoi (bc ni trc, trc trung gian, cm gi bc trt, ng

bao trc, ng x );

b) Mc cp cu a cc chi tit vo lp phi tun theo ch dn ca nh ch to;

c) Hai u trc lp khp ni trc phi tip xc vi nhau, khng c c khe h gia hai u ni;

d) Tm trc trung gian phi trng vi tm ng ray v song song vi mt ng ray. Sai lch cho

php l 1,0 mm/m. Trc trung gian phi quay trn nh trong bc trt;

e) Cc ng bao trc phi c lp kn vi v kn vi ng ng x;

f) Cc mi ghp ca ng ng x phi kn, cc mt bch phi vung gc vi ng ray, cc l bu

lng trn hai mt bch phi trng nhau, ng ng x phi c chn v lp c nh vi ng ray.

5.4.2.4 Lp t ng c in:

a) i vi t bm c cu khp ni mm thc hin theo quy nh ti 5.2.2 ;

b) i vi t bm c cu khp ni cc ng (ni ch thp) thc hin theo quy nh ti 5.2.2 nhng tr

s sai lch khi cn chnh cho php ly tr s tng ln 2 ln tr s sai lch tng ng ca khp ni mm.

5.4.2.5 Lp h thng bi trn trc: phi m bo cc yu cu quy nh ti 5.3.1.1.14 .

5.4.2.6 Cc bc tip theo thc hin theo cc quy nh t 5.2.1.4 n 5.2.1.8.

6 Vn hnh th nghim

6.1 Yu cu chung

6.1.1 Chy th nghim cc t my bm phi c mt ngi chu trch nhim chnh v lp t chng.

6.1.2 Trong thi gian chy th t my bm phi chp hnh nghim chnh cc quy nh ca nh ch to v s ln khi ng lin tip cho php ca ng c v khong thi gian gia cc ln khi ng.

6.1.3 Khng c tin hnh cc cng vic trn cc t my bm vi cc na khp ni trc lin kt vi nhau khi ni mch vi ng dy ca trm bin th.

6.1.4 Khng c tin hnh khi ng my bm khi van ng ht ng, tr cc trng hp ring c quy nh trong cc ti liu ch dn ca nh ch to.

6.1.5 Ch cho php chy th my khng ti khi b tng trong nh trm bm t cng thit k.

6.2 Chun b

Trc khi khi ng t my bm, phi thc hin cc cng vic sau y:

a) Lm v sinh b ht v b ht c y nc;

b) Lp cc thit b v dng c cn thit cho vic khi ng v th nghim t my bm;

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c) Kim tra lng du bi trn bng dng c o mc du;

d) Kim tra li cc van v thit b bo v;

e) Kim tra cc thit b in;

f) Kim tra ln cui ng trc ca khp ni;

g) Quay my bm bng tay, trc phi quay d dng;

h) Ngt bm ra khi ng c v tin hnh th khng ti kim tra ng c;

i) ng b ni trc bng cch c nh cc bu lng khp ni;

k) M hon ton van ht (nu c).

6.3 Khi ng v dng t my

6.3.1 Trnh t khi ng t my:

a) ng van trn ng x. i vi my bm hng trc, van trn ng x phi m hon ton;

b) m bo ng c sn sng khi ng;

c) m bo mc nc b ht cho php vn hnh my bm;

d) m bo cc iu kin cn thit cho vn hnh my nh lm kn, bi trn, lm mt;

e) Mi bm, m bo bm c mi y ;

f) ng in ng c;

g) Xc nhn p lc y t n gi tr cho sau khi chy ht tc ;

h) M van trn ng x, kim tra p sut y c tng ng vi tr s trong phm vi vn hnh hay khng;

i) Quan st ampe k lp trn bng iu khin m bo dng in nm trong vng gi tr nh mc

ca ng c ch ra trn tm bin tn ca ng c.

6.3.2 Trnh t dng bm:

a) ng t t van trn ng x (nu c);

b) Ngt in ng c;

c) M van ph chn khng (nu c);

d) Khi my bm dng hon ton th dng h thng lm kn, bi trn, lm mt,

6.4 Chy th khng ti

6.4.1 Chy th khng ti kim tra tnh trng t my bm lp t. Trong qu trnh chy khng ti, pht hin v loi tr cc sai st, khim khuyt cha c pht hin giai on lp t.

6.4.2 Trong qu trnh chy th cn theo di s hot ng ca t my bm, cc thng s v tc , rung, nhit , cc h thng lm mt, bi trn... Nu pht hin thy khuyt tt th dng my, tm

nguyn nhn v sa cha. T my chy th khng ti phi m bo cc yu cu sau:

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a) Chy m, khng c ting g v n di 80 xi ben (decibel);

b) Tr s dng in v in p, r r nc v du m bi trn... khng c vt qu tr s quy nh

ca nh sn xut;

c) Nhit hp du v bi trn khng qu 65 P0PC;

d) Nhit trc v b mt ma st b phn quay khng vt qu 65 P0PC;

6.4.3 Chy th khng ti kt thc nu t my lm vic bnh thng v n nh sau 2 gi.

6.5 Chy th c ti

6.5.1 Thc hin chy th c ti sau khi hon thnh chy th khng ti. Chy th c ti cho t my lm vic trong h thng vi lu lng v p lc cng tc lin tc trong 4 gi.

6.5.2 Trong qu trnh chy th nghim vi ti trng cng tc phi theo di v ghi li cc thng s k thut sau:

a) p sut ht;

b) p sut y;

c) Ct p ton phn;

d) Lu lng;

e) Cng sut;

f) Nhit ca my bm v ng c;

g) n v rung;

h) r r nc ti cc b mt ghp ni;

i) Dng in nh mc;

k) Nhit v qu trnh lm vic ca cc thit b in.

6.5.3 Nu t my v h thng in lm vic bnh thng, cc thng s k thut ph hp vi s liu trong h s ca my v my chy n nh 4 gi th kt thc chy th c ti.

6.5.4 Nu mt trong cc thng s trn khng t yu cu k thut th tm nguyn nhn v khc phc cho ti khi t.

6.5.5 Vic khi ng v dng my trong qu trnh chy th phi tun theo cc trnh t quy nh trong ti liu ch dn i km.

7 Nghim thu hon thnh

7.1 T my bm v h thng thit b in ch c nghim thu sau khi vn hnh t cc thng s k thut theo h s thit k k thut v chy n nh khng di 72 gi

7.2 Cc bc nghim thu, thnh phn Hi ng nghim thu, bin bn nghim thu, h s v th tc bn giao cng trnh thc hin theo cc vn bn php quy hin hnh.

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Ph lc A (Quy nh)

Mt s ch tiu k thut chnh khi lp t my bm

Bng A.1 - Sai lch kch thc ca mng b tng

Tn cc kch thc Sai lch cho php

1. Sai lch cc ng tm ca mng b tng so vi cc ng tm chun

tng ng, mm 20

2. Khong cch tm cc l bu lng, mm 15

3. Cc kch thc khc trn mt phng ngang, mm 30

4. cao ca mt b tng mng so vi cao thit k, mm - 30

5. Kch thc cc l bu lng :

- Tim l trn mt bng, mm + 5

- Chiu su l, mm + 10

- ng knh l, mm + 10

- khng thng ng ca l bu lng theo chiu su l, mm/m + 15

Bng A.2 - xin tm v di tm cho php khi cn chnh khp ni trc

Khp ni trc ng knh khp ni trc mm

di tm mm

xin tm mm/m

Khp ni mt bch cht cng Ti 300

T 300 n 500

0,05

0,07

0,20

0,20

Khp ni mt bch cht lt m n hi Ti 100

T 100 n 200

T 200 n 500

0,10

0,12

0,15

0,35

0,35

0,40

Khp ni bnh rng Ti 300

T 300 n 500

T 500 n 900

T 900 n 1 400

0,20

0,25

0,30

0,40

0,40

0,45

0,50

0,60

Khp ni l xo rng lc Ti 200

T 200 n 400

T 400 n 700

T 700 n 1 400

0,10

0,20

0,30

0,50

0,30

0,40

0,50

0,60

Khp ni vu Ti 100

T 100 n 200

T 200 n 300

0,20

0,30

0,40

0,50

0,50

0,50

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Bng A.3 - Sai lch cho php lp t my bm trc ngang


1. Sai lch cc ng tm ca my so vi cc ng tm chun tng ng,

mm 5,00

2. cao ca my so vi cao thit k, mm 5,00

3. khng thng bng ca my theo chiu trc:

- My c lu lng t 1 000 mP3P/h tr ln, mm/m 0,05

- My c lu lng di 1 000 mP3P/h, mm/m 0,10

Bng A.4 - Sai lch cho php lp t khung b t my bm


1. Sai lch cc ng tm ca khung my so vi cc ng tm chun

tng ng, mm 5,00

2. cao khung my so vi cao thit k, mm 5,00

3. khng thng bng ca khung my :

- Theo chiu dc trc, mm/m 0,05

- Theo chiu vung gc vi trc, mm/m 0,15

Bng A.5 - khng ng trc cho php khi nh tm theo cc na khp ni ca t my bm trc ngang

Tc quay ca trc bnh xe

cng tc r/min

Tr s o ng knh v mt u khp ni cho php

(khi ng knh khp ni nh hn 500 mm) mm

Khp cng Khp mm (cht n hi)

< 500 0,10 0,15

T 500 n 700 0,08 0,10

T 750 n 1 500 0,06 0,08

T 1 500 n 3 000 0,04 0,06

> 3 000 0,02 0,04

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Bng A.6 - Sai lch cho php lp t my bm trc ng


Sai lch tm vng my so vi tm chun, mm 1,00

cao vng my so vi cao thit k, mm 5,00

khng thng bng ca vng my, mm/m 0,05

khng thng ng ca trc bm, mm/m 0,05

Sai lch tm t my so vi tm chun, mm/m 5,00

Khe h hng knh gia bnh cng tc v bung bnh cng tc so vi khe

h trung bnh, % 20,00

Khe h hng knh gia rto v stato my so vi khe h trung bnh, % 5,00

o ca trc t my, mm 0,10

Din tch tip xc ca cc mnh bc chn ng, % 80,00

Sai lch chiu dy cc tm bc chn, mm T 0,02 n 0,03

Sai lch cao ca cc gi my pht so vi cao thit k, mm 5,00

khng thng bng ca gi trn ca my pht, mm 0,10

Sai lch tm gi trn ca my pht so vi tiu chun, mm 1,00

Bng A.7 - Khe h cho php gia bnh xe cng tc v vng mn my bm ly tm

ng knh bnh xe cng tc

mm

Khe h mm ng knh bnh xe cng tc

mm

Khe h mm

Nh nht Ln nht Nh nht Ln nht

T 80 n 120 0,15 0,20 T 360 n 500 0,40 0,50

T 120 n 180 0,20 0,30 T 800 n 1200 0,80 1,20

T 180 n 260 0,25 0,35 T 1 200 n 1 600 1,20 1,60

T 260 n 360 0,30 0,40 T 1 600 n 2 000 1,60 2,00

CH THCH :

1) Trong thc t nn ly tr s khe h trung bnh;

2) Khe h nh nht phi m bo quay bnh xe cng tc mt cch bnh thng (khng b va chm vo vng mn);

3) Cc khe h c o bng cn l v tr tm i din nhau trn cng mt ng knh.

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Bng A.8 - Khe h cho php gia bnh xe cng tc v vng mn my bm hng trc


mm

Khe h mm


mm

Khe h mm


300 0,2 0,3 1 000 0,9 1,2

400 0,3 0,4 1 200 1,0 1,4

500 0,4 0,5 1 600 1,3 1,8

600 0,5 0,7 2 000 2,0 2,5

800 0,8 1,0 2 500 2,5 2,9

CH THCH :

1) Trong thc t nn ly tr s khe h trung bnh;

2) Khe h nh nht phi m bo quay bnh xe cng tc mt cch bnh thng (khng b va chm vo vng mn);

3) Cc khe h c o bng cn l v tr tm i din nhau trn cng mt ng knh.

Bng A.9 - Khe h bi trn cho php ca bc trt bng vt liu cao su v g

my bm trc ng

ng knh ngng trc mm

Khe h g mm

Khe h cao su mm


T 80 n 120 0,05 0,21 0,08 0,13

T 120 n 180 0,06 0,25 0,10 0,16

T 180 n 260 0,08 0,28 0,12 0.18

T 260 n 360 0,09 0,33 0,14 0,21

CH THCH: Trong qu trnh vn hnh, cc trc b mi mn, cho php tng tr s khe h ln nhng khng qu 2 ln tr s

quy nh bng trn

Bng A.10 - Khe h cho php gia ngng trc v bc lt ca gi trc my bm trc ngang

ng knh ngng trc

mm

Khe h hng tm ln nht v nh nht

mm

ng knh ngng trc

mm

Khe h hng tm ln nht v nh nht

mm

Pha trn Pha di Pha trn Pha di

T 18 n 30 0,06 0,08 0,03 0,04 T 80 n 120 0,16 0,24 0,08 0,12

T 30 n 50 0,08 0, 12 0,04 0,06 T 120 n 180 0,24 0,36 0,12 0,18

T 50 n 80 0,10 0,18 0,05 0,09 T 180 n 240 0,36 0,50 0,18 0,25

CH THCH: Khi ng knh ngng trc bm D, mm, khc tr s trn, cho php xc nh tr s khe h theo cng thc sau:

(0,005 0,002) D i vi khe h pha trn v (0,001 0,0015) D i vi khe h pha di.

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Ph lc B (Tham kho)

S b tr lp t mt s b phn my bm v kim tra cht lng lp t

B.1 Quy cch bu lng mng v l bu lng b my

B.1.1 Khi khng c quy nh c th trong thit k th c th la chn kch thc bu lng mng v l bu lng b my theo bng B.1

Bng B.1 - Quy cch bu lng mng v l bu lng b my

ng knh l mm

T 12 n 13

T 13 n 17

T 17 n 22

T 22 n 27

T 27 n 33

T 33 n 40

T 40 n 48

T 48 n 55

T 55 n 65

ng knh

danh ngha ca

bu lng mm

10 12 16 20 24 30 36 42 48

B.1.2 Khi xit cht cu bu lng mng, phi s dng cc c l c chiu di tiu chun. i vi cc bu lng mng c t M30 tr ln, cho php dng ng lng vo chui c l tng chiu di phn chui

mt cch thch hp.

B.2 m cn chnh my bm

B.2.1 Khi khng c quy nh trong thit k th i vi cc loi m nghing v m bng ca cc thit b thng thng c th la chn theo bng B.2 v B.3. S v tr cc kch thc xem hnh B.1

Bng B.2 Kch thc m nghing cn my bm

TT Tn gi K hiu

Kch thc mm Vt liu

l b c a

1 m nghing 1 N1 100 50 3 4

2 m nghing 2 N2 120 60 4 6 CT38

3 m nghing 3 N3 140 70 4 8

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TCVN 8637 : 2011

Bng B.3 Kch thc m bng cn my bm

TT Tn gi K hiu Kch thc

mm Vt liu

l b

1 m bng 1 B1 90 60

2 m bng 2 B2 110 70 Gang xm

3 m bng 3 B3 125 85

1) m nghing 2) m bng

Hnh B.1 S kch thc cc m cn chnh my bm

B.2.2 Chiu dy h ca m da vo yu cu thc t v vt liu m quyt nh. nghing ca m nghing thng t 1/10 n 1/20. Chiu dy nh nht cho php ca m bng gang xm l 20 mm;

chiu dy nh nht ca m thp l 1 mm.

B.2.3 Khi s dng hn hp th m nghing phi c dng vi loi m bng c cng s hiu tc l "m nghing 1" lp phi hp vi "m bng 1"; "m nghing 2" lp phi hp vi "m bng 2";

"m nghing 3" lp phi hp vi "m bng 3".

B.2.4 Mt tip xc ca mng my hoc sn t my v m phi bng phng.

B.2.5 Trong mi t m, m nghing phi c t trn cng, pha di cc m nghing n phi t m bng.

B.2.6 Sau khi thit b c iu chnh v cn bng, cnh ca m phi th ra khi cnh bin ca mt chn b my nh sau:

a) i vi m bng: t 10 mm n 30 mm;

b) i vi m nghing t 10 mm n 50 mm.

l

bbh h

c

l

a

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TCVN 8637 : 2011

Hnh B.2 S b tr chn cc tm m cn chnh

Va

Mng

Tm m phng (bng)

Tm m hnh nm (nghing)

B bm

a) My bm trc ngang

b) My bm trc ng

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TCVN 8637 : 2011

B.3 B tr ng ng

Hnh B.3 S b tr ng ng ht trnh to thnh ti kh

ng

Ti kh

Sai

ng ng

Sai Sai

Ti kh Ti kh

Ti kh

ng

ngSai

Sai

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B.4 Kim tra ng tm khp ni

Hnh B.4 Minh ho phng php kim tra ng tm khp ni

S

B

A

chu vi khp ni l t yu cuNu s

TCVN 8637 : 2011

B.5 Cc cng vic kim nghim v kim tra cht lng lp t

Cc cng vic kim nghim v kim tra cht lng lp t phi ghi vo bin bn v phiu kim tra. Cc

dng kim nghim v kim tra c thng k trong bng B.4

Bng B.4

Cc dng kim nghim v kim tra trung gian

c ghi vo bin bn Cc dng kim nghim v kim tra c ghi

vo phiu kim tra

a) Tt c cc t my bm:

1) nh tm t my theo cc na khp ni

b) Cc t my bm ly tm v hng trc trc ng:

1) Cc tr s khe h gia rto v stato ca ng c

in.

1) Cc khe h hng tm gia trc bm v

bc lt ca cc nh hng v chn;

2) vung gc ca da thp ngng ta so vi

tim trc rto trc ng c;

3) thng ng ca rto ng c;

4) Hiu chnh ng ni chung cc trc t my.

c) Cc t my bm trc ngang:

1) Cc tr s khe h gia rto v stato ca ng

c in c trc kiu b;

2) Cc tr s rto dc trc v o ca trc

bnh xe cng tc;

3) Cc tr s khe h trong cc trt.

d) H thng bi trn tun hon:

1) Lm v sinh v th nghim thy lc thng du;

2) Th nghim thy lc cc ng dn du;

3) Th nghim thy lc h thng lm mt du.

CH THCH: Ngoi cc vic kim nghim v kim tra ni trn nu nh my ch to yu cu th phi tin hnh kim nghim,

kim tra thm cc hng mc khc theo yu cu ca nh my ch to v ghi vo phiu kim tra ca nh my.

B.6 Yu cu k thut r co bc v bc chn

B.6.1 Trong qu trnh lp t my bm, m bo kch thc khe h, nhn bng b mt, chnh xc hnh hc ca chi tit bc v bc chn cho php dng phng php r co ngui.

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B.6.2 Quy trnh r co ngui nh sau:

a) Trc khi r co ngui cn phi nh v bc , bc chn vi gi chc chn v tr lm vic;

b) Dng bt mu bi u mt lp mng trn b mt tip xc ca chi tit ng hoc chi tit tnh;

c) Dng tay y to chuyn ng gia hai chi tit, m b mt tip xc xc nh vt chm cn co;

d) Yu cu k thut qu trnh co ngui quy nh trong bng B.5.

Bng B.5

Loi my

bm

S

vng quay r/min

Khe h tnh cho 100 mm ng knh c trc

tip xc

Khe h

nh mm

Khe h

cnh mm

Gc m bc ,

Din tch

tip xc

bc chn %

S im tip xc trn

din tch 25 mm x 25 mm khng nh hn

im

Bm khe h

nh

Trn

3 000

T 0,07

n 0,10

T 0,05

n 0,80

T 60

n 80

80

10

Bm c h

thng bi trn

cng bc

n

3 000

T 0,12

n 0,18

T 0,06

n 0,10

Bm c vng

bi trn

n

3 000

T 0,15

n 0,20

T 0,10

n 0,15

30

Tiu chun ny s dng cc thut ng v nh ngha sau:

Documents

Tc Vn 86372011