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Hydraulic chassis engineering machinery walking control method and control system

A technology for construction machinery and travel control, applied in engine control, liquid variable displacement machinery, pump control, etc.

Inactive Publication Date: 2008-04-30
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a hydraulic chassis construction machinery travel control system, which can automatically adjust the working status of each important component of the hydraulic system according to the working conditions of the construction machinery, so that the entire The hydraulic system always provides a suitable driving drive to avoid power waste and insufficient driving force.

Method used

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  • Hydraulic chassis engineering machinery walking control method and control system
  • Hydraulic chassis engineering machinery walking control method and control system
  • Hydraulic chassis engineering machinery walking control method and control system

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Embodiment Construction

[0038] Please refer to Fig. 1, which is a schematic diagram of a power transmission system of a hydraulic chassis construction machine with a single pump and a single motor.

[0039] It can be seen from the figure that in the hydraulic chassis of the construction machine, its traveling mechanism includes an engine 101 , a hydraulic pump 102 , and a hydraulic motor 103 .

[0040] The engine 101 serves as a prime mover to provide power to the engineering machine. The throttle opening of the engine 101 can be adjusted, and different throttle openings correspond to different engine output characteristic curves. At each throttle opening, the output characteristic curve of the engine includes torque-speed curve, power-speed curve, fuel consumption-speed curve, these curves can provide the relationship between engine torque, power and fuel consumption and speed, the engine can be adjusted The parameter is the throttle opening of the engine. Corresponding to the same throttle opening...

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Abstract

The invention provides a hydraulic chassis engineering machine step control method, which includes testing the current load state of the engineering machine, the opening degree of the throttle, and the actual run speed. The invention judges the current load state, when the load state is intermediate low, and the difference of the actual speed and the goal rotate speed exceeds the preset range, then corresponding current can be provided for the hydraulic motor for regulating the displacement; namely when the actual rotate speed is lower than the goal rotate speed, current for lowering the displacement can be provided to the hydraulic motor; when the actual rotate speed is higher than the goal rotate speed, the current for improving the displacement can be provided to the hydraulic motor; when the load state is in overload, the displacement of the hydraulic motor can be adjusted to the maximum. The required power of the system can be calculated according to the current displacement of the hydraulic motor, the demand of the rotate speed, and the current pressure of the system. Current, the displacement of which can meet the requirement of the controller, is provided for the hydraulic pump according to the required power of the system, and the needed displacement can ensure that the power absorbed by the hydraulic pump can meet the requirement of the hydraulic motor. Compared with the prior art, the invention can enable the engineering machine to realize the control requirement accurately.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a walking control method of an engineering machinery using a hydraulic chassis. At the same time, the invention provides a control system for construction machinery using a hydraulic chassis. Background technique [0002] A complete machine is composed of prime mover, transmission mechanism, control section and working machine. Prime movers include electric motors, internal combustion engines, etc. The working machine is the direct working part that completes the working task of the machine, such as the scissors of the shearing machine, the tool holder of the lathe, the turning tool, the chuck, etc. Due to the limited range of power and rotational speed of the prime mover, in order to adapt to the wide range of working force and speed of the working machine, as well as other maneuverability requirements, a transmission mechanism is set between the prime mover and the workin...

Claims

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Application Information

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IPC IPC(8): F02D29/04F02D29/00F04B49/00
Inventor 曹显利李翠英刘军
Owner SANY HEAVY IND CO LTD (CN)
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