| 摘要 |
PROBLEM TO BE SOLVED: To easily and quickly warm a working liquid and stabilize operation of the working liquid, regarding the hydraulic pressure control apparatus for self-propelled type crusher. SOLUTION: The hydraulic pressure control apparatus comprises hydraulic actuators 1, 2, 3, a working liquid tank 11, a first control valve 9 installed in supply lines A, B communicating the hydraulic pumps 8a, 8b and the hydraulic actuators 1, 2, 3 for controlling the flow direction and flow rate of the working liquid to be supplied to a driving apparatus, a crushing apparatus, and the working apparatus, a second control valve 10 installed between the first control valve 9 and the hydraulic actuator 3 of the working apparatus for controlling the flow direction and the flow rate of the working liquid to be supplied to the working apparatus, operation selection means 28, working liquid temperature detection means 14, and control means 13. From the detection results of the operation selection means 28 and the working liquid temperature detection means 14, the control means 13 opens the first control valve 9 to the working apparatus direction and closes the second control valve 10. COPYRIGHT: (C)2007,JPO&INPIT
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