Method and device for lowering action impact of excavating machines, and excavating machine

Abstract

The invention provides a method and a device for lowering the action impact of excavating machines, and an excavating machine. The method comprises the following steps: calculating the accelerated speed of the change of the oil pressure of a pilot control loop; performing comparison and judging whether the accelerated speed is larger than a set value or not, if yes, reducing the output flow of a main hydraulic pump through an electromagnetic proportional pressure reducing valve. The device provided by the invention comprises an oil-pressure sensor, a computer, a comparator and a controller, wherein the computer is used for calculating the accelerated speed of the change of the oil pressure of the pilot control loop; the comparator is used for comparing the accelerated speed and the set value and judging whether the accelerated speed is larger than the set value or not; the controller is used for reducing the output flow of the main hydraulic pump if the accelerated speed is larger than the set value. The excavating machine provided by the invention comprises the main hydraulic pump, the electromagnetic proportional pressure reducing valve, a main valve, a pilot system, and the device for lowering the action impact of excavating machines. Through adoption of the method and the device for lowering the action impact of excavating machines, provided by the invention, the impact phenomenon of an executing mechanism when the excavating machine works is effectively avoided. The excavating machine provided by the invention does not generate impact during working, and the working is more stable.

Description

Technical field [0001] The invention relates to an engineering machine, in particular to a method, a device and an excavator for reducing the action impact of an excavator. Background technique [0002] Excavator is a kind of construction machinery, widely used in construction, roads, mines, ports and other engineering fields. The main function of the excavator is to carry out excavation operations. Hydraulic excavators account for most of today's excavators. [0003] At present, the working hydraulic systems of some of the more advanced domestic loaders have begun to generally adopt working hydraulic systems including pilot systems. This kind of pilot system mostly uses a pilot pump to directly supply oil to the pilot valve, and the pilot valve uses a smaller pressure to control and operate the high-pressure part of the operating system. [0004] In use, it is found that when the operating device (foot valve or handle) of the excavator in operation suddenly moves to the maximum a...

AI Technical Summary

Problems solved by technology

[0004] In use, it is found that when the operating device (foot valve or handle) of the excavator in operation suddenly moves to the maximum action, the corresponding actuator (oil cylinder, motor) will have obvious impact phenomenon, and this impact will be directly reduced. The service life of hydraulic components, and the above-mentioned shocks also have a negative impact on the service life of other parts on the excavator

Images