Automatic control system and automatic control method for scraper knife of hydraulic bulldozer

Abstract

The invention discloses an automatic control method for a scraper knife of a hydraulic bulldozer. The automatic control method comprises the steps of acquiring the rotating speed of a turbine under the current accelerator state, and keeping the scraper knife at the current position when the rotating speed of the turbine is within a first preset range under the accelerator state; descending the scraper knife and increasing the soil cutting depth when the rotating speed of the turbine is higher than the maximum rotating speed of the turbine in the first preset range, and stopping the descendingaction of the scraper knife until the rotating speed of the turbine is reduced within the first preset range; and ascending the scraper knife and reducing the soil cutting depth when the rotating speed of the turbine is lower than the maximum rotating speed of the turbine in the first preset range, and stopping the ascending action of the scraper knife until the rotating speed of the turbine is reduced within the first preset range. The invention can realize the automatic control on ascending and descending of the scraper knife by taking the relationship between the rotating speed of the turbine and the first preset range as judgment basis for whether the scraper knife is ascended or descended, thus improving the production efficiency and operation quality of the traditional bulldozer, and lightening the labor intensity of a driver.

Description

technical field [0001] The invention relates to the technical field of bulldozers, in particular to an automatic control system and an automatic control method for hydraulic bulldozer blades. Background technique [0002] At present, the working conditions and working environment of construction machinery, especially bulldozers, are extremely harsh. During the shoveling operation, the cycle action is frequent, and the working resistance changes in a large range. The driver needs to frequently lift and lower the blade. This operation mainly depends on the driver. The resistance to the shovel is judged, and the controller is manually operated to control the lifting of the shovel. Especially in the environment with various soil, rock or terrain conditions, the operator needs to frequently operate the lifting of the blade, which not only requires a high level of operation of the driver, but also inevitably has a large delay and instability. Accuracy, resulting in low work effic...

AI Technical Summary

Problems solved by technology

At present, most of the bulldozers in the existing market are hydraulically controlled, that is, the working device of the bulldozer adopts hydraulic transmission control technology. This technology has high requirements for the driver's manipulation skills, and it is difficult for non-professional drivers to complete the construction tasks of the bulldozer.

Although some colleges and universities in China have carried out research on the automatic control of bulldozer working devices, it is only a tentative study on the automatic control of mechanical bulldozers based on the engine speed, and the research on the automatic control of working devices of hydraulic transmission bulldozers with the largest stock in the market is still in progress. in blank

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