How To Ensure Your Apron Feeder Is Designed To Suit Your Needs

Apron feeder is a kind of heavy feeding equipment, mainly used in mining, coal, cement and other working environment is relatively poor place. This requires the apron feeder design and quality has very high requirements. Here are some tips on how to make sure your apron feeder design meets your customers’ needs.

Design essentials

Original parameter

The original parameters are given by the user or the process design, including the width of the groove plate, the center distance between the head and tail wheels, the feeding capacity, the material density, the installation angle, the average thickness of the output material layer within 1h, the material particle size, the warehouse pressure, and the process technology.

 

Determination of main parameters

Effective width of slot plate

B; b = 0.1

(2) loading effective length l=l-1(3) chain running speed

V-3cobh

(4) spindle device speed

Type 2– drive sprocket teeth t– traction chain rail pitch, m(5) total transmission speed ratio izn type n– drive motor speed, r/min.

Drive power calculation

At present, there is less data on heavy apron feeder in our country, the calculation of drive power has been carried out by the empirical formula in belinov’s book “Crusher, mill, feeder” In the former soviet union, namely

Μvcn=-1027:72 type u– friction coefficient of material on conveyor belt groove plate

Take 0.7

C– quality of the material on the feeder chain, kg

M– feeder chain efficiency, take 0.6

N,– feeder transmission efficiency, 0.8

In practical applications, the above type is not ideal, sometimes the current motor can not start, and sometimes many can run normally beyond the design condition. Therefore, by comprehensive analysis of the physical meaning of the above formula, its operating resistance is only the friction resistance of the ore to the plate, and it does not express the influence of other factors such as slope resistance, friction resistance between the chain and the support device, hurdle resistance, warehouse pressure resistance, and chain rigidity and bending resistance on the power consumption, so the calculation results are not accurate enough. Combined with years of design experience, the total resistance of the drive chain belt, that is, the circumferential force that the drive sprocket should pass to the chain belt, is analyzed, and the current power calculation method is derived.

The total running resistance includes the friction resistance caused by the dead weight of the mechanical moving parts, the friction resistance caused by the positive pressure of the running material, the friction resistance between the running material and the fixed plate, the lifting slope resistance, the warehouse pressure resistance and the additional resistance caused by the rigidity and bending of the chain belt.

Friction resistance f of moving parts

The friction resistance of the upper and lower branches of the apron feeder supporting wheel is basically distributed within the center distance range. It is approximately regarded as the uniform load within the center distance range of the head and tail shaft. The friction resistance is the rotating friction resistance generated by the self-weight.

The chain belt is a uniform load within the range of the center distance of the head and tail shaft. Because the upper and lower branches of the chain belt are supported by the back-up roller wheel, the friction resistance generated by the positive pressure on the back-up roller wheel is the friction resistance generated by the chain belt self-weight.

The friction resistance caused by the weight of the material on the chain belt is approximately regarded as an e value h, then the positive pressure exerted by the weight of the material on the chain belt is also a uniform load, and finally this pressure is also reflected to the upper back-up roller.

The friction resistance produced by the silo pressure is referred to as the silo pressure, and the size of this value is generally given by the process design and ultimately reflected to the support.

These are the key points to pay attention to in the design and selection of apron feeder. We are a professional supplier of crushing, screening and bulk material handling equipment, we provide you with one-stop service, warmly welcome you to visit our company.