Excavator converging control system and excavator thereof

Abstract

The invention discloses an excavator converging control system and an excavator thereof. The system comprises a pilot valve, a main valve and a converging valve, wherein the control end of the main valve is connected with the control end of the converging valve, and the output end of the pilot valve is respectively connected with the control ends of the main valve and the converging valve; a pressure sensor is connected with the control end of the main valve to detect the pressure value of the input end of the main valve and send the pressure value to a main controller; the main controller is connected with the pressure sensor and the control end of a proportional pressure reducing valve, acquires the operation state of the excavator according to the pressure value, and adjusts the opening of the proportional pressure reducing valve according to the speed of a movable arm or a bucket rod which corresponds to the preset operation state; and the input end of the proportional pressure reducing valve is respectively connected to an oil line between the output end of the pilot valve and the control end of the main valve as well as between the output end of the pilot valve and the control end of the converging valve, and the proportional pressure reducing valve is used for shunting the hydraulic oil which is output to the main valve and the merging valve by the pilot vavle under the control of the main controller. The action speed of the movable arm or the bucket rod of the excavator is coordinated with that of the other parts, so the working efficiency and the operation comfortability of the excavator are improved.

Description

technical field [0001] The invention relates to an excavator merging control technology, in particular to an excavator merging control system and an excavator thereof. Background technique [0002] At present, the lifting of the boom of the excavator is driven and controlled by the hydraulic system and the transmission system. In order to meet the needs of accelerating the lifting speed of the boom, the excavator supplies oil to the boom at the same time in the way of confluence of two pumps. Similarly, the digging and unloading actions of the excavator stick also supply oil to the stick at the same time in the way of double pump confluence. [0003] The existing excavator hydraulic system and transmission system, for the boom movement part, includes: the pilot valve that controls the boom to move up or down, the main valve that controls the boom’s rising or falling speed, and the main valve to jointly control the boom. Combiner valve for rising speed. For the stick moveme...

AI Technical Summary

Problems solved by technology

However, due to the preset parameters of the hydraulic system and transmission system of the excavator, and the variability of the flow rate of the hydraulic oil output by various valves in the system under different pressures, the dynamic The rising speed of the arm or the action speed of the stick is too fast, which is not coordinated with the speed of other parts

When the boom or stick is combined with other components, the operation is not smooth, resulting in low operating efficiency and poor operating comfort

[0004] Therefore, in the case of confluence of booms or sticks in the prior art, the rising speed of the boom or the movement speed of the stick is too fast, which is not coordinated with the movement speed of other components, resulting in unsmooth operation, low operating efficiency of the excavator, and poor operating comfort

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