Provided is a slewing hydraulic work machine capable of performing slewing and boom-raising operation with high efficiency. The hydraulic work machine includes an upper slewing body, a working device including a boom, a hydraulic pump (31), a variable displacement type slewing motor (25), a slewing control device (35, 45) performing a slewing control in accordance with an applied slewing command operation, a boom cylinder (26), a boom control device (37, 46) performing a boom-raising control in accordance with an applied boom-raising command operation, a boom angle detector (68), and a capacity control section (50). The capacity control section (50) calculates a command motor capacity based on a boom angle, generates a capacity command signal corresponding to the command motor capacity and inputs the signal to the slewing motor (25). During the performance of slewing and boom-raising operation, the capacity control section (50) sets the command motor capacity to a value equal to or less than a base capacity when the boom angle is equal to or less than a slewing priority angle and sets the command motor capacity to a value greater than the base capacity when the boom angle is greater than the slewing priority angle.


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    Title :

    SLEWING HYDRAULIC WORK MACHINE WITH SLEWING MOTOR CAPACITY CONTROL SECTION


    Additional title:

    SCHWENKBARE HYDRAULISCHE ARBEITSMASCHINE MIT DREHMOTORKAPAZITÄTSSTEUERUNG
    ENGIN DE TRAVAIL HYDRAULIQUE D'ORIENTATION AVEC RÉGULATEUR DE CAPACITÉ DU MOTEUR HYDRAULIQUE


    Contributors:
    UEDA KOJI (author)

    Publication date :

    2022-07-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66C Krane , CRANES / E02F Baggern , DREDGING



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