The invention discloses a buffer control system of a swing mechanism, a buffer control method and a crane, and relates to the field of engineering machinery. According to the invention, on one hand, an electric proportional overflow valve is adopted, the pressure set value of the overflow valve is changed via changing the control current of the electric proportional overflow valve, the dynamic variation of the buffer pressure of the overflow valve is realized, and the electric proportional overflow valve can be adaptive to the buffer requirement of different loads, for example, under the working conditions of low hoisting weight, slow stop of swinging and the like, the pressure set value can be reduced by changing the control current of the electric proportional overflow valve, so that a relatively good swing buffer effect can be obtained under the working conditions, and on the other hand, a valve core of a reversing valve can be controlled to reverse by adopting a proportional electromagnetic valve; the pressure of a control opening can be released slowly according to the setting of the proportional electromagnetic valve so as to achieve the buffer effect of stopping buffer, and especially when the external control oil source pressure and the flow rate variation are relatively high, the stability of swing stop can be improved.
Buffer control system of swing mechanism, buffer control method and crane
2015-04-01
Patent
Electronic Resource
English
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