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Engineering machine, hydraulic system and control method thereof

A technology of hydraulic system and hydraulic oil tank, applied in the direction of fluid pressure actuating system components, mechanical equipment, fluid pressure actuating devices, etc., can solve the problems of power source failure, limited improvement of hydraulic system power, energy loss, etc. The effect of reducing energy loss and fast response

Pending Publication Date: 2020-10-02
XCMG CONSTR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power increase of the hydraulic system is limited by the power that the power source can provide. At present, the hydraulic system lacks real-time matching with the power source, which leads to the inability to fully utilize the power of the power source and maximize the efficiency. It may also cause the power source to fail due to excessive system power.
The energy saving research of hydraulic system is limited to the improvement of system principle, and the high efficiency area of ​​hydraulic components, especially the pump, is underutilized, resulting in a certain energy loss

Method used

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  • Engineering machine, hydraulic system and control method thereof
  • Engineering machine, hydraulic system and control method thereof
  • Engineering machine, hydraulic system and control method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, it is a hydraulic system, including a hydraulic oil tank 1, a main pump 2, an auxiliary pump 3, a pilot oil source block 6, a multi-way valve 7, and an actuator;

[0042] The oil suction ports of the main pump 2 and the auxiliary pump 3 are respectively connected to the hydraulic oil tank 1; the oil outlet of the main pump 2 is connected with the first oil inlet P1 of the multi-way valve 7, and the oil outlet of the auxiliary pump 3 is connected with the multi-way valve The second oil inlet P2 of the multi-way valve 7 is connected, the first oil inlet P1 and the second oil inlet P2 of the multi-way valve 7 are connected inside the multi-way valve 7, and each working port of the multi-way valve 7 is connected to the corresponding actuator connect;

[0043] Such as figure 1 , Figure 4 As shown, the pilot oil source block 6 is provided with an oil inlet P3, an oil outlet C, and an oil return port T2, the oil outlet of the main pump 2 is connect...

Embodiment 2

[0054] The control method of the hydraulic system in the foregoing embodiments includes:

[0055] In response to the manipulation, calculate the sum of the displacements according to the manipulation signal and the rotational speed of the power source, distribute the sum of the displacements to the main pump 2 and the auxiliary pump 3 according to certain rules, and control the output displacements of the main pump 2 and the auxiliary pump 3 so that The main pump 2 and the auxiliary pump 3 work in the high efficiency area.

[0056] Further, it also includes:

[0057] Obtain the actual pressure and actual flow of the main pump 2 and auxiliary pump 3; calculate the hydraulic system pressure according to the actual pressure of the main pump 2 and auxiliary pump 3; calculate the hydraulic pressure based on the actual pressure and actual flow of the main pump 2 and auxiliary pump 3 The total power of the system; get the corresponding power source power according to the speed of th...

Embodiment 3

[0064] In another aspect, a construction machine is also provided, including the hydraulic system mentioned above.

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Abstract

The invention discloses an engineering machine, a hydraulic system and a control method thereof. The hydraulic system comprises a hydraulic oil tank, a main pump, an auxiliary pump, a pilot oil sourceblock, a multi-way valve, and an actuator, wherein the oil outlet of the main pump is connected to a first oil inlet, the oil outlet of the auxiliary pump is connected to a second oil inlet of the multi-way valve, and the first oil inlet and the second oil inlet of the multi-way valve are connected to each other; the oil outlet of the main pump is connected to the oil inlet of the pilot oil source block, the oil outlet of the pilot oil source block is connected to a pilot oil port of the multi-way valve, and an oil return port of the pilot oil source block is connected to the hydraulic oil tank; the pilot oil source block has a built-in solenoid valve; when the solenoid valve is energized, the core of the solenoid valve is located in the first position, and the oil outlet of the pilot oilsource block is connected to the oil inlet of the pilot oil source block through the solenoid valve; when the solenoid valve is de-energized, the core of the solenoid valve is located in the second position, and the oil outlet of the pilot oil source block is connected to the oil return port of the pilot oil source block through the solenoid valve; and both the main pump and the auxiliary pump comprise an electronically controlled variable pump, a variable displacement mechanism, a displacement sensor and a pressure sensor.

Description

technical field [0001] The invention relates to construction machinery, a hydraulic system and a control method thereof, belonging to the technical field of construction machinery. Background technique [0002] As users have higher and higher requirements for the work efficiency, safety performance, response speed and energy consumption of machinery and equipment. The various systems that make up the equipment are being optimized and upgraded to improve the performance of each system to meet the requirements of users. The hydraulic system is the main component of construction machinery and occupies most of the power of the equipment. From the initial quantitative hydraulic system to the variable hydraulic system , more and more energy-saving, and the efficiency is getting higher and higher. However, compared with the quantitative system, the variable system also has some defects. It takes a certain response time for the displacement of the variable pump to change from the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/17F15B13/02F15B13/06F15B21/041F15B21/08F15B1/04
CPCF15B1/04F15B11/17F15B13/023F15B13/06F15B21/041F15B21/08
Inventor 刘奔奔范小童宋亚莉李建洋邓应应
Owner XCMG CONSTR MACHINERY