Sinh vin thc hin: Bi Thanh TngNguyn Kin Thanh Khng Phm Minh Ph

TRNG CAO NG CNG THNG TP. HCM B mn: Thit B T ng ti: Thit b v cc phn t kh nn

2. Cc thit b kh nn hin nay

My nn kh c ng dng rt rng ri trong nhiu lnh vc v ngnhngh khc nhau nh :Ngnh ch to.Ngnh xy dng v trang tr.Ngnh bo dng xe my, xe hi, xe p.

2.2 XilanhXilanh tc dng np lc kh nn ch tc ng vo mt pha ca xilanh, pha cn li do ngoi lc hay l xo tc ng.

Xilanh tc ng 2 chiu (xilanh tc ng kp).Kh nn c a vo 2 pha ca xilanh, do yu cu iu khin m xilanh i vo hay i ra s tu thuc vo vic a kh nn vo pha no ca xilanh.

2.3 Van in t

Van in tl van c iu khin bi dng in thng qua tc dng ca lc in t. .

2.4 B lc kh nn Dng lc cc cht nhim trong khng kh trc khi em i nn li.

2.5 Khp ni

B. Cc phn t kh nn1. Khi nim: Mt h thng thng bao gm t nht gm cc mch iu khin gm cc phn t c m t nh sau:

Hnh 2.1 Cu trc cc mch iu khin v cc phn t

2. Van o chiu:

Van o chiu c nhim v iu khin dng nng lng kh nn bng cch ng m hay chuyn i v tr thay i hng i ca ng nng lng.

2.3: Van chn:Van chn l loi van ch cho lu lng kh nn i qua mt chiu, chiu ngc li b chn.Van chn gm cc loi sau:Van mt chiu.Van logic OR.Van logic AND.Van x kh nhanh.

2.3.1: Van mt chiu:Van mt chiu c tc dng ch cho lu lng kh nn qua mt chiu, chiu ngc li b chn.

2.3.2: Van OR:van logic OR C chc nng l nhn tn hiu iu khin nhng v tr khc nhau trong h thng iu khin.

2.3.3: Van logic AND:van logic AND c chc nng l nhn tn hiu iu khin cng mt lc nhng v tr khc nhau trong h thng iu khin.

2.3.4: Van x kh nhanh: Van c nhim v x kh ra ngoi nhanh.

2.4 Van tit lu:Van tit lu c nhim v iu chnh cc lu lng dng chy tc l iu chnh vn tc hoc thi gian chy ca c cu chp hnh. Ngoi ra van tit lu cng c nhim v iu chnh thi gian chuyn i v tr ca van o chiu

2.4.1: Van tit lu c tit din khng thay i:Lu lng dng chy qua khe h ca van c tit din khng thay i

2.4.2: Van tit lu c tit din thay i: Van tit lu c tit din thay i iu chnh c lu lng dng chy qua van.

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