Digital hydraulic speed changing operating valve

Abstract

The invention discloses a digital hydraulic speed changing operating valve which is applied to an engineering machine, namely a loading machine. The loading machine is provided with a rotating speed sensor. The rotating speed sensor is used for measuring the rotating speed of wheels of the loading machine. The digital hydraulic speed changing operating valve comprises a driving device, a valve body, a valve element and a PLC logic program controller. The digital hydraulic speed changing operating valve has the beneficial effects that the speed changing operating valve is connected with the PLCand the speed sensor, the automatic gear shifting function is achieved, the responding speed is high, and reversing is accurate; the labor intensity of operators can be greatly lowered when the digital hydraulic speed changing operating valve is applied to the loading machine, and the loading machine with the digital hydraulic speed changing operating valve is low in requirement for skills of theoperators.

Description

technical field [0001] The invention relates to a hydraulic valve, in particular to a digital hydraulic shift control valve, which belongs to the field of shifting mechanisms of loaders. Background technique [0002] When the loader is shoveling, the front end of the bucket comes from two directions of force, one is the traction force of the loader in the horizontal direction, and the other is the breakout force of the loader in the vertical direction. Loader traction is provided by the loader drive train. Breakout force is provided by the working hydraulic system. The loader operation is a cyclic process: insert into the stockpile, shovel (until the bucket is full), exit the stockpile and advance to the target unloading point, lift, and unload. During the entire operation cycle, the loader transmission system plays an important role throughout. At present, most of the loaders use a power-shift twin-turbo transmission, which provides two forward gears, one reverse gear, a...

AI Technical Summary

Problems solved by technology

Therefore, it is very labor-intensive for the driver to frequently manipulate the shift gear to switch.

[0005] 2. High requirements for the driver's proficiency

[0006] 3. Energy consumption

When the driver works for a long time, it is inevitable that the driver will be physically and mentally exhausted. During the operation, the time to switch gears is too long or too fast, and the work efficiency is low, so the time for the loader to do useless work is generated.

[0007] 4. Cannot realize automatic operation

Images