Excavator control system and excavator

Abstract

The invention provides an excavator control system and the excavator. The excavator control system includes the oil tank, the oil inlet circuit connected to the oil tank, the main oil return circuit and the auxiliary oil return circuit; the oil inlet circuit includes the oil pump and the multi-way valve; the multi-way valve has an action signal detection oil port; the main oil return circuit It includes a back pressure valve connected to the output port of the multi-way valve; the input port of the cartridge valve is connected between the output port of the oil pump and the inlet of the multi-way valve, and the reversing valve includes the first oil port, the second oil port and the third oil port. One oil port is connected with the control oil port of the cartridge valve spring chamber, the second oil port is connected with the first output port of the cartridge valve, the third oil port is connected with the fuel tank, the second output port of the cartridge valve is connected with the fuel tank, and the cartridge valve The spool is used to open or close the second output port; the output port of the action signal detection oil port is connected with the reversing valve, so that the first oil port communicates with the second oil port or the third oil port. The excavator control system and the excavator provided by the invention can not affect the stability of the action of the excavator, and at the same time save the fuel consumption of the excavator.

Description

technical field [0001] Embodiments of the present invention relate to hydraulic control technology, in particular to an excavator control system and the excavator. Background technique [0002] Excavator, also known as excavating machinery (excavating machinery), is an earth-moving machine that uses buckets to dig materials higher or lower than the bearing surface, and loads them into transport vehicles or unloads them into stockyards. [0003] Usually, in the control system of an excavator, it is necessary to form a system back pressure so that the excavator system runs smoothly and does not cause cavitation. The oil pump of the excavator control system in the prior art is connected to the multi-way valve, and the multi-way valve is connected to the back pressure valve. Compensate the cavity generated by the working device during the working process to prevent the hydraulic components from sucking air during operation. On the other hand, it can stabilize the oil return to ...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned excavator control system, the oil pump always maintains a certain load pressure to ensure negative feedback pressure or system back pressure when the excavator is operating, and when the excavator is running but not operating, the system back pressure It still exists when the excavator is not moving, and this pressure increases the load on the engine and increases the fuel consumption of the excavator

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