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Control system and method for engineering machinery and engineering machinery

A technology for construction machinery and control systems, which is applied to mechanical equipment, earth movers/shovels, fluid pressure actuating system components, etc., and can solve the problems of complex operation and inflexible control methods.

Active Publication Date: 2019-01-29
中联重科土方机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current control method is not flexible enough, and the switching of excavator functions depends more on the connection of corresponding hydraulic pipelines, and the operation is more complicated

Method used

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  • Control system and method for engineering machinery and engineering machinery
  • Control system and method for engineering machinery and engineering machinery
  • Control system and method for engineering machinery and engineering machinery

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Embodiment Construction

[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0030] figure 2 It is a structural diagram of a control system for engineering machinery provided by an embodiment of the present invention. like figure 2 As shown, a control system for construction machinery provided by the present invention may include: a main valve 20 for controlling the action of the actuator of the construction machinery; an electric proportional valve group 21, the electric proportional valve group 21 includes a first An electric proportional valve and a second electric proportional valve, the first electric proportional valve is connected with the first side chamber of the main valve, and the second electric proportional valve is conn...

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Abstract

The invention relates to the field of engineering machinery, and discloses a control system and method for engineering machinery and the engineering machinery. The control system comprises a main valve, an electric proportional valve set and a controller. The main valve is used for controlling an executing mechanism of the engineering machinery to act. The electric proportional valve set comprisesa first electric proportional valve and a second electric proportional valve. The first electric proportional valve is connected with a first lateral cavity of the main valve. The second electric proportional valve is connected with a second lateral cavity of the main valve. The electric proportional valve set is used for outputting different voltage to control a valve core of the main valve to move. The controller used for outputting different pulse width modulation signals to the first electric proportional valve and the second electric proportional valve of the electric proportional valveset according to electric signals output by a left operation handle and a right operation handle of the engineering machinery. The control method is simple and flexible, hydraulic impact of the hydraulic system can be reduced, and therefore stable running of the whole engineering machinery is achieved.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a control system and method for construction machinery and construction machinery. Background technique [0002] In the hydraulic excavator in the prior art, the pilot pressure output by the hydraulic pilot handle 10 controls the reversing of the spool of the main valve 11, so as to realize the corresponding action of the excavator. Specifically, the driver of the excavator operates the hydraulic pilot handle 10, and the hydraulic pilot handle 10 outputs the corresponding secondary pressure, which transmits the pressure energy to both ends of the spool of the main valve 11 through the hydraulic pipeline, and pushes the replacement of the spool of the main valve 10. direction, so that the working device moves to achieve the corresponding operation, such as figure 1 shown. [0003] The current control method is not flexible enough, and the switching of excavator functions de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/08F15B13/02E02F9/22
Inventor 刘象宝白晶艾伦·尼克尔塞缪尔·韩贾慧
Owner 中联重科土方机械有限公司
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