Method for maximum rotation speed restriction of rotary engineering machinery and system thereof

Abstract

The invention discloses a method for limiting the maximum slewing speed of a rotatable engineering machinery from overturning, which is characterized in that it includes: reading the stable moment and static overturning moment of the rotatable engineering machinery in the current state, and Calculate the dynamic overturning moment space Tdmax, that is: Tdmax=stabilizing moment-static overturning moment; according to the dynamic overturning moment space Tdmax, according to the formula: (see the formula below the right), calculate the maximum allowable turning speed ωmax; , G is the lifting weight, L is the lifting range, and H is the action distance of the dynamic force; the above three parameters are obtained by measuring the corresponding sensors on the crane; according to the maximum allowable rotation speed ωmax and the reduction ratio i of the rotary reducer, Calculate the maximum allowable rotational speed nmmax of the swing motor; control the rotational speed of the swing motor to be below the maximum allowable rotational speed nmmax. The control method provided by the invention maximizes the slewing capacity of the slewable construction machinery, and reduces the labor intensity and operating experience requirements of the operator.

Description

technical field [0001] The invention relates to a device for preventing overturning of a rotatable construction machine, in particular to a method for limiting the maximum slewing speed of the rotatable construction machine. The invention also provides a system for realizing the method. Background technique [0002] The rotatable construction machinery means that the construction machinery is divided into two parts, the upper and lower cars, in which the upper car will rotate around a rotary shaft fixed on the lower car to achieve the required engineering construction operations. Cranes are a typical slewing construction machinery. During the hoisting operation of the crane, the slewing operation needs to be carried out continuously, and the stability of the crane must be maintained to prevent it from losing balance and overturning due to the action of the heavy objects being hoisted. [0003] figure 1 A schematic diagram showing the static stress of the crane during hois...

AI Technical Summary

Problems solved by technology

The method of manually controlling the slewing speed of the crane used in the prior art depends on the operator's operating experience; most operators generally tend to make the slewing speed slightly lower in order to avoid the crane from overturning, so as to avoid serious situations such as overturning. The crane can never give full play to its slewing capacity

On the other hand, some operators due to lack of experience, coupled with on-site environmental constraints

As a result, the supporting legs cannot be fully deployed or the counterweight setting is unreasonable, etc., which will cause the operator to misestimate the reserved space for the dynamic tipping moment of the crane, and use an excessively high speed for slewing operation, resulting in an overturning accident of the crane

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