Welcome to the high-quality mining machines zone!
The product cross sectional area is defined by the idler trough shape and the product pile on top of the idler trough the trapezoid shape this section on top of the trapezoid can be described with a circle and the angle this circle makes with the belt is the surcharge angle typical conveyor cross sectional area 1
Level conveyors hpf x s x pm33000 inclined conveyors hpp x bpmx f x s33000 effective tension pull needed to move belt and load horizontally e f x pm tight side tension total tension to move belt and load horizontally e 2 ee 1 slack side tension additional tension required to prevent slippage on drive pulley e 1 e x k
Surcharge anglethe angle to the horizontal which the surface of a body of material assumes while the material is at rest on a moving conveyor belt this angle usually is 5 to 15 less than the angle of repose though in some materials it may be as much as 20 less
Sep 22 2012 with materials which slumpreadily such as fine powders or dust or on long conveyors where the load may settle consideration shouldbe given to using a reduced surcharge angle for capacity determination and may require the compensatoryuse of other factors such as greater belt width or speed to provide the required capacityinclination anglethe angle of inclination of a conveyor changes
To illustrate the concept discussed above lets consider a 6 km long conveyor belt with a capacity of 5000 tph the trough angle the surcharge angle and the bulk density are again taken 35 20 and 850 kgm3 respectively figure 4 shows the required belt speed as a function of the belt width to achieve the required capacity of 5000 tph
Jan 12 2005 for belts on inclined conveyors the theoretical quantity carried has to be reduced by a constant factor depending on the angle of inclination this constant factor for different inclination angle are as below incl angle 2 4 6 8 10 12 14 16 18 const factor 10 099 098 097 095 093 091 089 085
Surcharge angle can reduce along long conveyors reducing edge clearance conveyor loading is rarely a steady state as in belt design and therefore an allowance for surging is appropriate feed from an apron feeder or bucket wheel can result in 25 per cent surging ore properties can be extremely variable
Feb 07 2011 a sandwich belt conveyor uses two conveyor belts facetoface to gently but firmly contain the product being carried hence making steep incline and even verticallift runs easily achievable but this ends up being a governing factor in many conveyors 7th february 2011 1122 10 ian white consulting engineer the more this surcharge
Where k is the specific wear rate for abrasion of the rubber by the iron ore v is the speed of the belt is the coefficient of friction between the bed of ore and the belt surface w is the width of the belt and l is the overall endtoend length of the conveyor make your assumptions clear b in one particular conveyor 1100 m long 18 wide and moving at 4 m s 1 10 mm
Ivt conveyed volume at a conveyor speed o 1 ms the surcharge angle is the angle formed between a horizontal line and a linetangent to the materials slope both of which lines pass through the point where the slope meets the belt usually the surcharge angle is 1015 less than the angle of repose ffthe parameters for design of belt conveyor
C coefficient main resistance factor f resistance coefficient l belt length m g acceleration ms q ro mass of the idlers on top side kgm q ru mass of the idlers on bottom side kgm q b belt mass kgm q g mass of the conveyed material kgm h lift m f s1 special main resistances f s2 special secondary resistances
Conveyors are uniformly loaded normally a belt speed at 160 fpm means in one minute 666667 lb of material is spread out over 160 feet or 666667160 4167 say 42 plf material load this is most likely not conservative because conveyors are run overloaded all the time in industrial operations
Belt conveyor capacity table 1 determine the surcharge angle of the material the surcharge angle on the average will be 5 degrees to 15 degrees less than the angle of repose ex 2712152 determine the density of the material in pounds per cubic foot lbft3 3 choose the idler shape 4 select a suitable conveyor belt speed 5 belt conveyor
The following conveyor belt capacity charts show tons per hour tph based on material weighing 100 lbs per cubic foot 20 material surcharge angle with three equal length rolls on troughing idlers capacity tph 03 x belt speed fpm x material weight lb per cu ft x load cross section sq ft tph with 20 troughing idlers
Oct 03 2015 the angle of surcharge of a material is the angle to the horizontal which the surface of the material assumes while the material is at rest on a moving conveyor belt this angle usually is 5 degrees to 15 degrees less than the angle of repose though in some materials it
Nylon conveyor belts sizes multiply type nn 100 2002 2ply to nn 315 2500 7 where 2 3 4 represents number of fabric ply reinforcement layers in conveyorbelting ep multiply conveyorbelt sizes type polyesternylon ep125 2502 to ep 400 knm 3150 8 regular standard sizes of conveyorbelt fabric strength rating types available 4002 3153 5003 6303 5004 6304 8004 10004 8005
When belt conveyor starts for 10 fundamental period peak belt acceleration at the tail and tension at the head are 0018 ms 2 and 629 kn respectively when the belt conveyor starts for 15 fundamental period peak belt acceleration at the tail and tension at the head are 0075 ms 2 and 6079 kn respectively thus tension and acceleration are smaller when starting for 10 fundamental period
The initial surcharge factor qi is calculated and then the feeder vertical load is calculated using qi see formula shown on form alternatively two other emperical methods of calculation are offered bruffs method and the method proposed in the bridgestone conveyor design manual see the calcs calculate pullout force from hopper menu
Smith industrial only uses a line of conveyor belt that is manufactured tough and tested tough on over 70 miles to date in some of the most torturing applicationsviking premium belt uses premium polyesternylon fabric in the belt carcass with a full 10 to 1 break strength for minimum stretch maximum fastener retention and superior load support
Copyright © 2020 Fionca Machinery Company All rights reservedsitemap