Chapter IV 1
KYÕ THUAÄT NAÂNG - VAÄN CHUYEÅN
CHÖÔNG IV
CAÙC THIEÁT BÒ PHANH HAÕM
(ARRESTING GEAR AND BRAKES)
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Chapter IV 2
1. MUÏC ÑÍCH:
-They stop the load and hold it when applied to the hoisting
motion or bring the relevant mechanisms at rest within specified
braking distances as this is the case on traveling and slewing
motion
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Chapter IV 3
2. PHAÂN LOAÏI:
Döïa vaøo caáu taïo boä phaän laøm vieäc (contruction):
Phanh maù.
Phanh ñai.
Phanh ñóa.
Phanh noùn.
Döïa vaøo nguyeân taéc hoaït ñoäng (operating principle) :
Phanh töï ñoäng (automatic)
Phanh ñieàu khieån.( controlled)
Hôïp thaønh phanh aùp truïc (coù maët ma
saùt taùch rôøi hay khoâng taùch rôøi).
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Chapter IV 4
2. PHAÂN LOAÏI (tt):
Döïa vaøo chöùc naêng (the purpose the brake serves):
Phanh döøng cô caáu ôû cuoái chuyeån ñoäng.( stopping brakes)
Phanh giôùi haïn vaän toác, nhöng khoâng giöõ vaät.( regulating
brakes)
Theo tính chaát cuûa söï taùc ñoäng löïc ñieàu khieån phanh
(the mode of applying the brakes-operating force):
Phanh thöôøng ñoùng.( normally -set brakes)
Phanh thöôøng môû.( normally-released brakes)
Phanh tổng hợp. (combination brakes)
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Chapter IV 5
Purpose
-Arresting gears are the means of sustaining the
load which do not interfere with the hoisting but
prevent it from coming down due to gravity
-Arresting gear in general fall into two basic kinds
which are the
ratchet- and- pawl arrangement
and
Back- stopping roller clutch
3. CÔ CAÁU KHOÙA DÖØNG
(Arresting gear)
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