Method for improving the characteristic of the operation of excavation and the characteristic of the preparation operation of the excavator

摘要

Method for improving the characteristic of the operation of excavation and the characteristic of the preparation operation of the excavator. This is a method to improve the characteristic of the operation of excavation and the characteristic of the preparation operation of an excavator.A hydraulically controlled selector valve (7) is added in a control circuit of the confluence of launches of a hydraulic excavator, and a group of solenoid valve (4) is added in the control circuit of confluu00eanda of spear and the control circuit of the confluence of Ca u00e7amba / rod.A controller sends a control signal to switch the group of solenoid valve (4) between a mode disconnected and a connected mode.The controller can send a signal to disconnect the group of solenoid valve (4), to restore a coil valve to a position intermediate, restore a circuit of lifting of the confluence of the spear, and disconnecting a circuit of confluence of oscillation of the bucket rod to and / Fetuar a way of excavation pattern.The controller can send a signal to connect the group of solenoid valve (4), so that the group of solenoid valve (4) to disconnect a circuit of lifting confluu00eanda of spear and increase a circuit of confluence of oscillation bucket / rod to get a way to lea The feed preparation.The method enhances operational efficiency and comfortability of control, while reducing the maintenance cost and production during preparation and excavation.