Hii Can anybody tell me how to calculate motor graders pull force??
Drawbar pull Blade Pull, this specification is also known as drawbar pull. This spec can be calculated as follows Variables: Rear Weight of machine =Wr Tire traction coefficient =T you have to have a coefficient of traction factors Wr x T = Blade pull so say the RW = 23,151 lb and the T = 0.65 23,151 x 0.65 = 15,048.15 lb concrete = .90 clay loam, dry = .55 clay loam, wet = .45 dry sand = .20 wet sand = .40 quarry pit = .65 gravel road = .36 packed snow = .20 ice = .12 Tires and type will play some factors also. Hope this helps!
Hello Thank you for reply. But i have one doubt when i saw caterpillar 12M motor grader brochure in this they give Blade pull and Down pressure. Can anybody tell me what are the difference between this and how to calculate both force. Here i have attached snap shot of cat 12M grader brochure.
blade pull and down pressure are almost completely different. Down pressure is how much weight that the machine can apply to the blade pushing down, this is of course limited by the overall weight on the machine, and the hydraulic capability of the blade cylinders, relief valves, etc... Blade pull is maximum tractive effort. Its tug of war with a scale holding the other end. And as explained above, determined by machine weight and tire slip.
ok Thank you for this. But can you please tell me how to calculate down pressure?? is it any empirical formula for this?? I have a one formula for this but i don't know its wrong or right. blade down force = ( front weight of grader X grader wheel base)/( grader wheel base - grader blade base) grader blade base = dist between front axle to blade edge.
And not forgot: allwheel drive graders have a bit more blade pull than the other
Hello Here i calculate some engine power run vehicle in 30 KMPH And also in 20 % gradability. And grader draw bar force is 4950 kg. So can you please help me how to calculate grader hp from this Draw bar force?
Blade down pressure Blade down pressure can be calculated as follows. Blade to front axle length = BA Wheel base length = WB Weight on front wheels = FW Blade down pressure = BD WB ---------- X FW = BD (WB - BA) This is for a 140H BA = 101 in FW = 9310 lb WB =240 in BD = ? 240 ---------------- X 9310 = 16,075 lb (240 - 101) Hope this helps also !
Ya its also helpful to me. thanks for it. Can you please help for above engine power calculation