How to calculate excavators productivity.docVIP

How to calculate excavators productivity Productivity is one of the main technical and economic indexes of hydraulic excavator, it said in a unit of time from the face in mining and unloading soil transport vehicles or spoil bank earthwork volume. How many cubic meters per hour usually dug as a unit, on the site is also useful to dig out day and night shift or earthwork volume to represent. The general concept of three kinds of productivity. The 1 theory of productivity The theory of productivity refers to an excavator working hours in condition the productivity. Condition may be taken as: (1) a skilled driver operation, fully consider the machinery for single action combined oil and possibilities for composite action, such as moving arm birth and turntable at the same time, the boom and the bucket rod hydraulic cylinder working alone can be combined oil etc.. (2) select the most frequent working conditions and the average size of work. As taking the most frequently excavated soil as the calculation of soil. The backhoe, half maximum digging depth is calculated as mining depth, the average height of the loading height or spoil bank as calculated by dumping height, take 90 ° as one-way rotary turntable angle. (3) face, transport vehicle (spoil bank) and the relative position between the appropriate selection of excavators, truck, with a good. Theory of productivity calculated: Q = 60qn (m3 / h) Type: Q as the theory of productivity; N per minute work cycle theory value; Q bucket geometrical capacity (cubic meters) Productivity refers to the maximum productivity machinery in the conditions for work an hour can get. The given conditions including soil conditions, the bucket fill, loading conditions. The actual productivity is mechanical practice over a period of time the average productivity. To calculate the actual productivity mainly consider two factors, namely, the utilization rate of the machine and the driver proficiency, actual productivi