The belt feeder is a belt conveyor that is subjected to high pressure and short length, and is also a relatively economical feeding device. There are three types of installation, as shown in Figure 1: a type is suitable for powder, the belt has a large pressure; b type is suitable for general materials, and a regulating gate valve can be set between the bucket and the feeder; c type It is suitable for non-adhesive medium-sized materials. The gate valve is generally installed between the bucket and the feeder. The feeder has no pressure on the surface of the mine. The belt feeder has a belt speed of generally less than 0.3 m/s. If there is no gate valve on the feeder to control the discharge volume of the mine bin, the belt speed of the feeder can be increased to 1 m/s. When the material size exceeds 350 mm, it is best not to use a belt feeder. (1) Calculation of the production volume of belt feeder Q t =3600K 1 bhγV (1) Where M———motor power, KW; Where h———layer thickness, m; Where μ———the coefficient of friction, μ=0.4-0.45; Where i———the number of layers of conveyor belt core canvas, layer; China Plant Extract Powder,Raw Chemical Materials manufacturer, choose the high quality Growth Tree Plant Plant,Plant Extract Material, etc. Plant Extract Powder,Raw Chemical Materials,Growth Tree Plant Plant,Plant Extract Material Jiangsu Kaihuida New Material Technology Co., Ltd , https://www.khdchemical.com
The belt feeder has no series of products and is generally designed by the user. Its structure is shown in Figure 2. [next]
Where Q t ———production quantity, t/h;
K 1 ———The utilization factor of the trough body, generally taking K 1 =0.75~0.85;
b———the distance between the two panels, generally greater than 2.5 times the maximum particle size of the material, m;
h———the height of the fence, m;
Γ—the loose density of the material, t/m 3 ;
υ———speed, m/s.
(two) motor power calculation
K 2 ———Safety factor K 2 =1.1～1.15;
η———transmission efficiency, η=0.94～0.97;
P Q ———load consumption power, kW;
P K ———the consumption power of the fence, kW;
P p ———Compressed power consumption, kW.
(1) Calculation of P Q :
l———the length of the fence, m;
Γ—the loose density of the material, t/m 3 ;
υ———speed, m/s;
ƒ ———The coefficient of friction between the material and the slab, ƒ =0.4~0.7;
δ———The effective internal friction angle of the material, (°).[next]
(3) Calculation of P P :
σ 1 ———column pressure, Pa;
b———the width of the discharge opening of the silo, m;
D———the diameter of the discharge port of the silo, m;
Lo———the length of the discharge opening of the silo, m;
Γ—the loose density of the material, t/m 3 ;
g———gravitational acceleration, g=9.81m/s 2 ;
ƒ ƒ ———flow factor;
π———piule ratio;
K 3 ———The pressure coefficient of the silo loading. If the filling of the warehouse is often in operation, take K 3 =2~4; if the storage height of the silo is not less than 3m, take K 3 =1.2.
(3) Calculation of the maximum tension of the conveyor belt
K 5 ———Safety factor, generally taking K 5 =12;
B——-bandwidth, m;
σ p ———the radial strength of the canvas core, N/(m · layer).