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Energy-saving control device and control method for controlling bucket rod of excavator to descend

An energy-saving control and excavator technology, which is applied in the direction of mechanically driven excavators/dredgers, etc., can solve problems such as stick drop and air suction, and achieve the effects of reducing oil return, reducing pilot pressure, and reducing opening amount

Inactive Publication Date: 2019-05-10
SHANGHAI SANY HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide an energy-saving control device and control method for controlling the lowering of the bucket rod of an excavator, so as to solve the problem of air suction caused by excessively fast lowering of the bucket rod in the prior art

Method used

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  • Energy-saving control device and control method for controlling bucket rod of excavator to descend
  • Energy-saving control device and control method for controlling bucket rod of excavator to descend

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Embodiment 1

[0034] Such as figure 1 As shown, the embodiment of the present invention provides an energy-saving control device for controlling the lowering of the stick of an excavator, including a pressure sensor 1, a controller 2, a solenoid valve 3 for controlling the lowering of the stick, and a stick spool 4;

[0035] The pressure sensor 1 is used to detect the oil pressure at the oil inlet of the large cavity of the arm cylinder;

[0036] The controller 2 is used to collect pressure signals through the pressure sensor 1 in real time when the stick is digging, and then obtain the current pressure value, and judge the pressure within a preset time range (that is, a certain time range) Whether the drop value is greater than or equal to the standard threshold value; if the pressure drop value within the current preset time range (that is, a certain time range) is greater than or equal to the standard threshold value, it is judged that the pressure value of the large chamber of the stick...

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Abstract

The invention relates to an energy-saving control device and control method for controlling a bucket rod of an excavator to descend. The energy-saving control device for controlling the bucket rod ofthe excavator to descend comprises a pressure sensor, a controller, an electromagnetic valve for controlling the bucket rod to descend, and a bucket rod valve core. The controller is used for collecting pressure signals in real time through the pressure sensor when the bucket rod carries out excavation action, then the current pressure value is obtained, and whether the pressure descending value within the preset time range is larger than or equal to the standard threshold value or not is judged; if the pressure descending value within the current preset time range is larger than or equal to the standard threshold value, it is judged that the pressure value of a large cavity of a current bucket rod oil cylinder is descended too fast, and it is determined that the phenomenon of air suctionis caused easily; and at the moment, the controller controls to reduce currents of the electromagnetic valve for controlling the bucket rod to descend in an electromagnetic valve set, then the openingamount of the bucket rod valve core is reduced, thus the oil amount of a small cavity of the bucket rod oil cylinder is reduced, the system back pressure is increased, and finally the problem of airsucking of the bucket rod is eliminated.

Description

technical field [0001] The invention relates to the technical field of excavator control, in particular to an energy-saving control device and control method for controlling the lowering of an excavator arm. Background technique [0002] The boom and stick refer to a working device of the excavator, usually also called the boom and the forearm, and their main function is to control the excavation and loading of the bucket. The arm connected to the frame is longer, so it is commonly called the big arm, and its term is called the boom; the arm connected to the bucket is smaller, so it is commonly called the small arm, and the term is called a stick, so they are commonly called the big and small arms. Among them, the stick hydraulic cylinder is the above-mentioned connecting driving device connected between the boom and the frame, and the driving action of the stick hydraulic cylinder (or called stick cylinder) can drive the boom to perform up and down along the frame ( fallin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F3/42
Inventor 吕建平伍荣伟涂晓丹
Owner SHANGHAI SANY HEAVY IND
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