Light Steel Rail 60×40 Flat Bar Application in Cranes

Light Steel Rail 60×40 Flat Bar Application in Cranes
At present, the common types of rails used for crane trolleys include QU70 rail, QU80 rail, QU90 rail, QU100 rail, 18KG/M, 24KG/M, 38KG/M, 43KG/M, steel rail 60×40 flat bar, etc. The first four types are crane rails. 38KG/M and 43KG/M are hot rolled rails for railway use. Glory Steel could offer steel rail 60×40 flat bar as crane rail. The trolley running rails of cranes with a lifting capacity of 20 tons or less are all light rails. It can be seen that the light rails are widely used on cranes, so the application of the light rails in the current standard on cranes is worth studying. steel rail 60×40 flat bar is also widely used as crane rails. Of course, counting the results of previous products for light rail selection is only an empirical reference. Whether the new light rail can be adapted or not has to be explained by data.
We should mainly consider the bearing capacity of the wheel and the rail during the selection of wheels and rails. In the design and selection process of the wheel set and the rail, the main data is the allowable wheel pressure, followed by the maximum working wheel pressure and the maximum static wheel pressure. The usual calculation method for the allowable wheel pressure is calculated by point contact and calculated by line contact. Since the line contact is closer to the actual situation of the crane operation, the calculation is usually performed in accordance with the line contact. When the material of the wheel and the rail is clear, the working level of the mechanism and the running speed are unique, the allowable wheel pressure is only related to the wheel diameter and the effective contact length. The effective width of the new light rail 12KG/M rail is greater than that of the 24KG/M rail of the old light rail. The effective width of the new light rail 15KG/M rail is greater than that of the 18KG/M rail of the old light rail. The effective width of 22KG/M is larger. Not only that, the effective width of the 30KG/M rail of the new light rail is already greater than that of the 38KG/M and 43KG/M in the railway track. When the other conditions are the same, the allowable wheel pressure is proportional to the effective width of the wheel and the rail contact. The larger the effective length under the same conditions, the larger the allowable wheel pressure, so the effective width of the current standard light rail is far superior to old standard light rail. The trend of the data of the allowable wheel pressure is very close to the trend of the effective contact width. Therefore, from the perspective of the allowable wheel pressure, the new light rail is not only suitable for the track of the crane trolley, but also has better performance than the old light rail.
Substituting old light rails or railway rails with new light rails will reduce the weight of the rails used and reduce costs. With the new light rail instead of the old light rail or rail track optimization combination, the diameter of the selected wheel set can be reduced to achieve cost reduction. When the diameter of the wheel is reduced, the reduction ratio of the reducer required by the mechanism is also reduced, which is equivalent to increasing the load carrying capacity of the reducer, so that the reducer also has the possibility of cost reduction by selecting a downshift. The accessories such as the pressure plate for the new light rail have space for cost reduction. After adopting the new light rail, the quality of the running track of the trolley is reduced, and the running mechanism and the steel structure of the crane also have the possibility of weight reduction, so there is still room for indirect cost reduction. Since the rails of the new light rail are thin, the allowable pressure of the rail itself is not as good as that of the old light rail and the rail. Therefore, it is necessary to consider the rail itself when the static load test or the calculation of low speed, low working system, maximum working wheel pressure, maximum static wheel pressure and allowable wheel pressure. Due to the light weight of the new light rail, the rigidity may be relatively weak. Therefore, when the analog design adopts the new light rail, the crushing stress of the small wheel pressure on the main web is reviewed for the off-track beam. For the normal rail box beam and the semi-offset rail beam, the local bending of the upper flange plate is calculated. In summary, the new light rail is not only suitable for the selection of cranes, but also the track material with excellent performance and high cost performance, which should be preferred in practical design and application.