Device for improving linear running performance of excavator during compound action

Abstract

The invention discloses a device for improving the linear running performance of an excavator during compound action and belongs to the technical field of excavators. According to the device, one-way electro-hydraulic proportional pressure valves are additionally arranged in a running control loop; flow sensors are additionally arranged in working loops of running motors, and switch-on and switch-off of signals of the flow sensors are controlled by a pressure valve; flow sensors are additionally arranged in a working loop in a region between a first main pump and a multiple-path valve group and electrically connected to running controllers respectively; and the running controllers compares and analyzes signals measured by the flow sensors, and output the compared and analyzed signals to control output pressure of the electro-hydraulic proportional pressure valves, the opening degrees of running control valve cores in the multiple-path valve group are regulated, and the amount of flow entering the running motor is changed, so that the rotation speeds of the running motors on two sides are equal. The device has the advantages that a running deviation phenomenon due to different loads borne by the two running motors on the two sides during combined action of the excavator is avoided, the linear running performance of the excavator is improved, and the construction safety is guaranteed.

Description

technical field [0001] The invention relates to a device for improving the linear walking performance of an excavator during compound actions, and belongs to the technical field of excavators. Background technique [0002] Hydraulic excavator is a main type of construction machinery and the main mechanical equipment for earthwork excavation. It is widely used in industrial and civil buildings, roads and bridges, municipal engineering, farmland water conservancy and other departments. Excavator actions include walking, slewing, raising and lowering the boom, retracting and swinging the stick, and retracting and turning the bucket. When two or more movements are performed at the same time, it is called a compound movement. Walking compound action usually refers to the operation of swing or boom or bucket while the excavator is moving forward or backward. When the excavator is operated independently, the two main pumps supply oil to the left and right travel motors independen...

AI Technical Summary

Problems solved by technology

[0003] But the actual situation is that it is difficult to maintain the same load on both sides of the travel motor, especially under severe working conditions, the load difference between the two sides of the travel motor is greater. More working oil flows to the travel motor on the side with a smaller load, while less working oil flows into the side with a larger load, which makes the excavator deviate and affects the safety of construction

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