Excavator main pump overflow identification method
An identification method and technology for excavators, which are applied to earth movers/shovels, construction, etc., can solve the problems of excavator main pump overflow identification lag, etc., to save fuel consumption, keep engine speed stable, and reduce pump pressure. The effect of displacement
Active Publication Date: 2019-11-19
GUANGXI LIUGONG MASCH CO LTD
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a timely and effective identification method for identifying the overflow of the main pump of the excavator in view of the lagging problem of the identification of the overflow of the main pump of the existing excavator
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[0017] The specific implementation will be described below in conjunction with the accompanying drawings.
[0018] Such as image 3 As shown, the excavator in this embodiment includes a controller, a bucket opening pilot pressure sensor 1 connected to the controller, a bucket recovery pilot pressure sensor 2, a stick opening pilot pressure sensor 3, a stick recovery pilot pressure sensor 4, Boom up pilot pressure sensor 5, boom down pilot pressure sensor 6, left swing pilot pressure sensor 7, right swing pilot pressure sensor 8, left travel pilot pressure sensor 9, right travel pilot pressure sensor 10, left pump pressure sensor 11, Right pump pressure sensor 12, engine speed sensor 13, and power switch 14 and KEY_ON switch 15 that connect controller 16 with power. The engine speed sensor 13 is used to detect the engine speed, and the left pump pressure sensor 11 and the right pump pressure sensor 12 are used to detect the pump port pressure of the left pump and the pump port...
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The invention relates to an identification method for excavator main pump overflowing to solve the problem of lagging of existing excavator main pump overflowing identification. A main pump comprisesa left pump body and a right pump body. The identification method comprises the following steps that the rotary speed of an engine, pressure values of the left pump body and the right pump body and pilot pressure values of all operation actions of an excavator are collected; and when a rotary speed value of the engine is smaller than a program set value, the pressure of the left pump body and thepressure of the right pump body are larger than program set values and at least one of the pilot pressure values of the operation actions is larger than a program set value, the situation that the main pump is in an overflowing state is judged. According to the identification method, the overflowing state of the main pump can be identified in advance, thus, the pump displacement can be more quickly reduced, the rotary speed of the engine keeps stable, large speed decreasing cannot be generated, and fuel consumption is reduced accordingly.
Description
technical field [0001] The invention relates to a hydraulic system of an excavator, more specifically, to a method for identifying overflow of a main pump of an excavator. Background technique [0002] When the excavator is working, if the main pump overflows, the hydraulic oil will directly return to the oil tank through the overflow valve, and will not go to the working device, resulting in waste of energy, and if it is not timely reduced according to the overflow state The output displacement of the pump will cause the engine to experience a large drop in speed, which will increase the fuel consumption of the engine and affect the customer's operating experience. [0003] The existing main pump overflow identification method is to collect the outlet pressure of the main pump, judge that when the outlet pressure of the main pump is close to the set pressure of the overflow valve of the main pump and keep it for a period of time, the main pump is considered to be in an over...
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IPC IPC(8): E02F9/22
CPCE02F9/2246
Inventor 王志伟赵明辉孙金泉蔡登胜
Owner GUANGXI LIUGONG MASCH CO LTD