The invention relates to a rotary combined control valve, comprising a valve body, a reversing valve and an electric proportional overflow valve; a rotary motor is provided with a first oil port and a second oil port, the first oil port and the second oil port are respectively communicated with a first working port and a second working port of the reversing valve by a first oil path and a second oil path, and the first working port and the second working port of the reversing valve are communicated with an return oil path via the electric proportional overflow valve; an oil inlet of the reversing valve is communicated with a main oil path. The invention also provides a rotary system, a crane and a control method. The stationarity of the rotary system in a whole process can be improved, and a free slip rotating function is provided.
Rotary combined control valve, rotary system, crane and control method
03.06.2015
Patent
Elektronische Ressource
Englisch
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