The invention provides a crane hydraulic control band-type brake system and a crane, and relates to the technical field of cranes. The crane hydraulic control band-type brake system comprises a hydraulic control valve, a shuttle valve and a band-type brake oil cylinder, wherein an outlet of the shuttle valve is connected with the band-type brake oil cylinder; a first oil way is arranged between anoutlet of the hydraulic control valve and a first inlet of the shuttle valve; a second oil way is arranged between the outlet of the hydraulic control valve and a second inlet of the shuttle valve; asequence valve and a pressure increasing valve are arranged on the second oil way in the direction from the outlet of the hydraulic control valve to the shuttle valve, wherein the sequence valve is used for conducting the second oil way when oil pressure of the outlet of the hydraulic control valve reaches a preset value; an inlet of the pressure increasing valve communicates with the sequence valve, an outlet of the pressure increasing valve communicates with the second inlet of the shuttle valve, and the oil pressure of the outlet of the pressure increasing valve is larger than that of theinlet of the pressure increasing valve.
本发明提供了一种起重机液控抱刹系统及起重机,涉及起重机的技术领域,所述起重机液控抱刹系统包括:液控阀、梭阀和抱刹油缸,所述梭阀的出口与所述抱刹油缸连接;所述液控阀的出口和所述梭阀的第一进口之间设置有第一油路;所述液控阀的出口和所述梭阀的第二进口之间设置有第二油路;且沿所述液控阀的出口向所述梭阀方向,所述第二油路上设置有顺序阀和增压阀,所述顺序阀用于在所述液控阀的出口油压达到预设值时,将第二油路导通;所述增压阀的进口与所述顺序阀连通,所述增压阀的出口与梭阀的第二进口连通,所述增压阀的出口的油压大于所述增压阀进口的油压。
Crane hydraulic control band-type brake system and crane
起重机液控抱刹系统及起重机
2020-06-19
Patent
Electronic Resource
Chinese