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

A technology of construction machinery and slewing speed, which is applied to cranes and other directions, and can solve problems such as incorrect estimation of crane reserved space, lack of experience, and on-site environmental restrictions
CN100572257CInactive Publication Date: 2009-12-23SANY HEAVY IND CO LTD (CN)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SANY HEAVY IND CO LTD (CN)
Publication Date
2009-12-23
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Claims

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