Hydraulic system and engineering machinery
A technology for hydraulic systems and construction machinery, which is applied to fluid pressure actuating system components, mechanical equipment, fluid pressure actuating devices, etc., can solve problems such as the decline of excavator work efficiency, and achieve improved heat dissipation efficiency, low power consumption, and effective cooling effect
Inactive Publication Date: 2013-06-19
SANY HEAVY MACHINERY
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
As the oil temperature rises, the working efficiency of the excavator will decrease
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] The present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention. In addition, according to the description of this document, those skilled in the art can combine the features in the embodiments in this document and the features in different embodiments accordingly.
[0017] Please refer to figure 1 , this figure is a schematic structural diagram of the hydraulic system provided by the first embodiment of the present invention; the hydraulic system may include: a main valve 11, a pilot pump 12, a main pump 13a, a main pump 13b, an oil return back pressure valve 14, and a filter 16 , the radiator 15, the first switching device 17a and the first switching device 17b.
[0018] Wherein, the first end of the first switching device 17a is connected to the oil outlet of the main pump 13a,...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a hydraulic system and engineering machinery. The hydraulic system comprises a main valve, a main pump, a radiator and a first switching device. A first end of the first switching device is connected with an oil outlet of the main pump, a second end of the first switching device is connected with the main valve, and a third end of the first switching device is connected with an oil inlet of the radiator. When the temperature of oil at the oil outlet of the main pump is higher than a preset temperature, the first end of the first switching device is communicated with the third end of the first switching device, and the second end is disconnected. When the temperature of the oil at the oil outlet of the main pump is lower than the preset temperature, the first end of the first switching device is communicated with the second end of the first switching device, and the third end is disconnected. Through the hydraulic system, the temperature of the hydraulic oil can be lowered quickly, the heat dissipation efficiency is improved, and heat can be dissipated effectively when the engineering machinery is at the idle speed.
Description
technical field [0001] The invention relates to the field of hydraulic technology, in particular to a hydraulic system, and also to an engineering machine including the hydraulic system. Background technique [0002] At present, radiators are usually used to dissipate heat from hydraulic oil in construction machinery. The strength of its cooling capacity is greatly affected by the working environment temperature and engine speed. At the same time, since the radiator includes components such as a water-cooled radiator, an air intercooler, and a condenser, its heat dissipation area is limited, and its heat dissipation performance is also restricted to a certain extent. For example, for an excavator, when the ambient temperature is greater than 35 degrees, it will show insufficient heat dissipation capacity after working for 1 to 2 hours, resulting in a rapid rise in the temperature of the hydraulic oil. As the oil temperature rises, the working efficiency of the excavator wi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F15B21/04
Inventor 连加华张昭荆玉涛
Owner SANY HEAVY MACHINERY