Lifting Equipment Efficiency From A Professional Point Of View
The productivity of lifting equipment is the number of tons of cargo or designs, processed per unit of time. In practice, operational productivity is consider to be the volume of work performed by machine. The operational performance of the crane is affected by a number of fixed and variable parameters. The article is prepared basing on the material published by the leaders of the industry: GMH, a far-famed manufacturer, lifting equipment inspection and lifting equipment services expert, as well as Machinery Britannia, another major UK business.
Constant parameters are determined by performance characteristics of the crane’s load capacity (including the cases with no outriggers and traveling with a load), hook height, speed of movement of workers, the method changes the length of the arrows, time-consuming to install working equipment and ease of maintenance units.
Variables do not depend on the design of the crane – they are determined by the conditions of its application and driver’s qualifications. These include: the kind of cargo, type of work, design-planning decisions of the object, the type of cargo handling point, the technological scheme of work, type of road base, as well as the location of the object area.
Thus the constants and variables have a certain impact on the operational performance of the crane. The number of cycles of the crane is inversely proportional to their duration. The cycle of the crane is the time it takes to slinging, lifting, turning, lowering, installation, bridling shipping and returning to the to the starting position. Hence, the total cycle time is made up of computer time and time to perform manual operations. Machine cycle time is dependent on the speed of movement of workers and their possible alignment path length since the hooks of the hook load to return to its original position. Achieving a reduction in machine cycle time due to a significant increase in the rate of movement of workers is hardly possible, which is explained by the requirements of safe operations. Therefore, the potential for raising productivity of the crane can be identified mainly by increasing its use of coefficients to carrying capacity and time.
The coefficient of crane payloads is defined as the ratio of weight of cargo that can be lifted by crane to its carrying capacity to a minimum radius of the hook. During the processing of the crane loads the average weight of the load is taken into account. Thus, to improve performance the amounts of cargo shall be loaded close to the maximum capacity of the machine. For cranes operating on the supports/without them, performance is determined separately for each type basing on the conditions. However, the mode of operation of the crane as a whole is set at a rate of carrying capacity, resulting in its work on the supports.
The coefficient of crane time takes into account the inevitable technological breaks, organizational downtime crane and the frequency of their recurrence during the shift. Technological interruptions caused by the need to replace lifting devices, crane placement in the work area, setting on the outriggers and remove from them, moving the crane from one work area to another. Organizational downtime associated with TO, transportation tap on an object, the transmission shifts, refinement work areas and building or installation of goods and designs.