Hydraulic energy-saving control system of construction machinery
An energy-saving control system and construction machinery technology, which is applied to earth movers/excavators, construction, etc., can solve the problems of difficult determination of controlled points, difficult adjustment, and easy damage of hydraulic components, so as to achieve good energy-saving effect and controlled point accurate effect
Inactive Publication Date: 2013-12-04
LIUGONG CHANGZHOU MACHINERY +2
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Problems solved by technology
[0002] At present, in the hydraulic system of construction machinery, the energy-saving measures for the hydraulic system generally use the action of the sequence valve to control the displacement of the main pump or detect the pressure of the driving oil circuit to control the displacement of the main pump. When the main pump is controlled, Its controlled points are difficult to determine and adjust, and some hydraulic components are easily damaged, which can easily cause accidents
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[0008] This embodiment is applied to a hydraulic excavator, and only the slewing system and the stick excavation system are listed for illustration. The hydraulic system includes the main pump 5, hydraulic control components and actuators. The hydraulic system has a slewing system flow sensor 8 and a stick. The excavation system flow sensor 6, the slewing system flow sensor 8 and the arm excavation system flow sensor 6 detect the overflow flow of the overflow control part in the hydraulic system; there is a controller 4, which receives the slewing system flow sensor 8 and The signal sent by the flow sensor 6 of the stick excavation system outputs a signal after calculation and processing, and sends the output signal to the main pump control mechanism that controls the displacement of the main pump.
[0009] The flow sensor is connected to the overflow valve overflow port to detect the flow of the overflow port; the overflow valve is the rotary system overflow valve 15 and the s...
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The invention discloses a hydraulic energy-saving control system of construction machinery. The system is characterized by comprising a flow transducer and a controller, wherein the flow transducer is used for detecting the overflow flow of an overflow control part in the hydraulic system; and the controller is used for receiving a signal transmitted by the flow transducer, outputting the signal subjected to computation treatment and sending the output signal to a main pump control mechanism used for controlling the discharge capacity of a main pump. After the technical scheme is adopted, once the output flow of the main pump is more than the flow required by an executive component, excessive hydraulic oil generates overflow at an overflow outlet of an overflow valve; and when the overflow oil flows back to an oil tank and the flow transducer detects the overflow oil, the flow transducer sends an electric signal to the controller, the controller controls the action of an electromagnetic valve through internal computation, the corresponding press oil is introduced into a control oil tank of the main pump, and the aims of reducing the discharge capacity of the main pump and saving energy are fulfilled. The hydraulic energy-saving control system has the advantages that: the flow of the overflow outlet is directly detected, the main pump is controlled, the controlled point is accurate, and the energy-saving effect is good.
Description
technical field [0001] The invention relates to a construction machinery hydraulic energy-saving control system suitable for construction machinery hydraulic systems, especially hydraulic excavators. Background technique [0002] At present, in the hydraulic system of construction machinery, the energy-saving measures for the hydraulic system generally use the action of the sequence valve to control the displacement of the main pump or detect the pressure of the driving oil circuit to control the displacement of the main pump. When the main pump is controlled, Its controlled points are difficult to determine and adjust, and some hydraulic components are easily damaged, which can easily cause accidents. Contents of the invention [0003] The purpose of the present invention is to provide a construction machinery hydraulic pressure pump that can accurately measure the controlled point of the main pump and facilitate the control of the main pump. Energy saving system. [0...
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IPC IPC(8): E02F9/22
Inventor 林明智邢树鑫
Owner LIUGONG CHANGZHOU MACHINERY