The invention relates to the technical field of vehicles, and discloses a revolution speed regulation control system and a crane. The control system comprises a hydraulic oil tank, a hydraulic pump, a proportion control hydraulic valve, a pilot control hydraulic valve and a revolution hydraulic motor, the hydraulic pump extracts hydraulic oil from the hydraulic oil tank and provides the hydraulic oil to the proportion control hydraulic valve, the proportion control hydraulic valve controls the flow and the direction of the hydraulic oil under the control of the pilot control hydraulic valve and provides the flow and direction controlled for the revolution hydraulic motor, the control system also comprises a control valve group, the control valve group comprises an oil leakage branch, the oil leakage branch is provided with a reversing valve and a throttle valve, the reversing valve is serially connected with the throttle valve, the oil inlet of the oil leakage branch is connected with the oil outlet of the hydraulic pump, and the oil outlet of the oil leakage branch is connected with the hydraulic oil tank. The control system provides a main oil path of the hydraulic oil for the revolution hydraulic motor, and is provided with the control valve group with the oil leakage branch, so the control of multiple shifts of the speed by a single pump is realized, the cost is saved, and the structure is simplified.
Revolution speed regulation control system and crane
17.06.2015
Patent
Elektronische Ressource
Englisch
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