스크류 컨베이어
1. SPECIFICATION
1) CAPACITY : 6.6 ton/hr ( 7 m3/hr )
2) SCREW DIA : 0.35 m
3) SCREW LENGTH : 4.8 m
4) SCREW PITCH : 0.29 m
5) BULK DENSITY : 30 ton/m3
6) QUANTITY : 1 set
2. CAPACITY
Q = 60 × A × N × ø × γ
A = VOLUME
N = SCREW R.P.M
ø = 단면효율
γ = BULK DENSITY
P = SCREW PITCH
A = 3.14 × ( D 2 - d 2 ) × P = 3.14 × ( 0.35 2 - 0.114 2 ) × 0.29
4 4
= 0.0249 m3/R.P.M
D = SCREW DIA
d = SCREW SHAFT DIA.
N = 1750 × 1 × 17 = 47 RPM
30 21
Q = 60 × 0.0249 × 47 × 0.35 × 0.95
= 23.35 ton/hr > 9.5 ton/hr ----------- OK
3. MOTOR POWER
H = C × Q × L + Q × h H : 소요동력
270 270 C : 운반물의 성질에 의한 계수
Hm = H L : SCREW CONVEYOR 길이(m)
η h : 양정(m)
H = 4 × 22.12 × 4.8 + 22.12 × 3 Hm : MOTOR 출력(HP)
270 270 η : 구동전달 효율
= 1.81 HP
Hm = 1.81 = 2.5 HP
0.7
∴ 사용 MOTOR : 3HP × 4 P × 1/30 ----------- OK
4. R.S. SPROCKET
i = MOTOR RPM × GEARED RATIO × 1/SCREW RPM
i = 1750 × 1/30 × 1/47
= 1.24
DRIVING SPROCKET : 17 NT
HEAD SPROCKET NT = D / SPROCKET NT × i
= 17 × 1.24 = 21 NT
USED CHAIN & SPROCKET : RS #80 × 17 NT × 21 NT ------------ OK