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Hydraulic system and engineering machine with same

A hydraulic system and hydraulic pump technology, which is applied in the hydraulic field, can solve the problems of waste of resources of hydraulic components and the inability to fully utilize the potential of hydraulic pumps, etc., achieve good operational performance, improve overall working ability, and improve adaptability

Active Publication Date: 2010-10-20
SANY AUTOMOBILE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At the same time, in a hydraulic system including two different types of hydraulic pumps, the potential of each hydraulic pump in the hydraulic system can be fully utilized only when the ratio of the rated power of the two hydraulic pumps is equal to the ratio of the loads of the two hydraulic pumps. Each hydraulic component; but in actual work, due to the diversity of actual work and the variability of workload, such conditions cannot be met at all; therefore, in a hydraulic system including two different types of hydraulic pumps, there are also situations where the hydraulic The potential of the pump, resulting in the waste of resources for hydraulic components

Method used

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  • Hydraulic system and engineering machine with same
  • Hydraulic system and engineering machine with same
  • Hydraulic system and engineering machine with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The hydraulic system provided by Embodiment 1 includes a power part 100 , a control valve group 200 , a load part 300 and a control device 400 .

[0043] The power part 100 includes a first hydraulic pump 1.1, a second hydraulic pump 1.2, a third hydraulic pump 1.3 and a fourth hydraulic pump 1.4. The first hydraulic pump 1.1 and the third hydraulic pump 1.3 are connected in series on the same prime mover output shaft and run synchronously , the second hydraulic pump 1.3 and the fourth hydraulic pump 1.4 are connected in series on the output shaft of another prime mover and run synchronously. The control valve group 200 includes the first main road hydraulic valve 2.1, the second main road hydraulic valve 2.2, the third main road hydraulic valve 2.3, the fourth main road hydraulic valve 2.4, the first bypass unloading valve 3.1, the second bypass Unloading valve 3.2, third bypass unloading valve 3.3 and fourth bypass unloading valve 3.4. The load part 300 includes a fi...

Embodiment 2

[0058] The hydraulic system provided by Embodiment 2 also includes a power part 100 , a control valve group 200 , a load part 300 and a control device 400 .

[0059] The power part 100 comprises a first hydraulic pump 1.1 and a second hydraulic pump 1.2, both hydraulic pumps are driven by the same prime mover. The load part 300 includes a first load A and a second load B formed by different hydraulic actuators, and the first load A may be greater than the second load B. The control valve group 200 includes a first main hydraulic valve 2.1, a second main hydraulic valve 2.2, a first bypass hydraulic valve 4.1 and a second bypass hydraulic valve 4.2. The control device 400 also includes a pilot control valve 5 and a processor 6 .

[0060] Such as figure 2 As shown, the first main road hydraulic valve 2.1 is connected between the pump oil port of the first hydraulic pump 1.1 and the first load A, and the second main road hydraulic valve is connected between the pump oil port o...

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Abstract

The invention discloses a hydraulic system and an engineering machine with the same. The disclosed hydraulic system comprises a first hydraulic pump, a second hydraulic pump, a first load and a control valve group, wherein the first hydraulic pump and the second hydraulic pump are respectively connected with the first load through the control valve group; the control valve group has a first state and a second state; in the first state, the first hydraulic pump supplies oil to the first load while the second hydraulic pump stops supplying the oil to the first load; and in the second state, the second hydraulic pump supplies the oil to the first load while the first hydraulic pump stops supplying the oil to the first load. The hydraulic system can make full use of each hydraulic pump to supply hydraulic oil to a load, so that the reliability of the hydraulic system is no longer only depends on the unfailing performance of a hydraulic pump. Therefore, the overall reliability of the hydraulic system can be improved; and the maintenance period or the service life of the hydraulic system can be prolonged.

Description

technical field [0001] The invention relates to a hydraulic technology, in particular to a hydraulic system, and also relates to a construction machine with the hydraulic system. Background technique [0002] With the development of society, the requirements for automation and integration of construction machinery or equipment continue to increase, and the requirements for the function and reliability of hydraulic engineering machinery are also getting higher and higher. In order to meet the current functional requirements and reliability requirements, many mechanical equipment, especially large-scale hydraulic equipment, have multiple hydraulic pumps in their hydraulic systems, and use different hydraulic pumps to provide high-pressure oil for corresponding parts or components, forming multiple hydraulic pumps. Pump hydraulic system. [0003] As the energy conversion element in the hydraulic system, the hydraulic pump can convert the mechanical energy of the power source i...

Claims

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Application Information

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IPC IPC(8): F15B11/02F15B11/17F15B13/02
Inventor 杨敏贺电罗斌
Owner SANY AUTOMOBILE MFG CO LTD