Cooling structure of piston head
A cooling structure and piston cooling technology, applied to pistons, engine components, machines/engines, etc., can solve problems such as poor cooling effect, poor fuel economy, and limited oil volume, so as to improve fuel economy and reduce oil volume , the effect of high utilization rate
Pending Publication Date: 2020-06-30
广西玉柴船电动力有限公司
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Problems solved by technology
The cooling scheme of the cooling nozzle injection method is adopted. The oil beam sprayed by the nozzle starts to diverge after a certain distance from the nozzle, so the amount of oil sprayed into the internal cooling oil chamber of the piston is limited, and the cooling effect is not good.
[0004] Another cooling method for the piston head currently exists, such as Figure 10 As shown, the engine oil enters the oil channel on the connecting rod body from the oil channel on the connecting rod neck, and the oil channel on the rod body sprays engine oil to the bottom of the piston through the small end of the connecting rod. The distance between the engine oil and the combustion chamber is relatively long in this cooling method. The heat exchange effect is not ideal, some models use the above two methods to cool the piston at the same time, the oil flow required for the lubrication system is large, the accessories consume a lot of work, and the fuel economy is poor
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[0026] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0027] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0028] figure 1 It is a schematic diagram of the overall structure of the cooling structure of the piston head according to an embodiment of the present invention; figure 2 yes figure 1 Schematic diagram of the cross-sectional structure of A-A; image 3 yes figure 1 Schematic diagram of the cross-sectional structure of middle B-B; Figure 4 yes figure 1 Schematic diagram of the sectional structure of middle C-C; ...
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The invention discloses a cooling structure of a piston head. The cooling structure comprises a connecting rod, a connecting rod small end bushing, a piston pin and a piston. The connecting rod is provided with a connecting rod body oil passage, and a connecting rod small end oil groove is formed in a connecting rod small end of the connecting rod and corresponds to the connecting rod body oil passage. The connecting rod small end bushing is installed on the connecting rod small end of the connecting rod. The piston pin is assembled on the connecting rod small end bushing, the piston pin is internally provided with a piston pin inner cavity oil passage, two sets of piston pin bosses are assembled at both ends of the piston pin and correspond to the piston pin inner cavity oil passage, piston pin oil outlet holes are formed in the centers of the two sets of piston pin bosses and located in the piston pin inner cavity oil passage, and a piston pin oil inlet hole is formed in the center position of the piston pin. The piston is assembled on the piston pin, and a piston inner oil cooling cavity is formed in the piston. In this way, the cooling structure of the piston head is high in utilization rate of cooling engine oil, can greatly reduce the amount of engine oil required by a lubrication system, and improves fuel economy.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to a cooling structure for a piston head. Background technique [0002] The working environment of the piston is a high-temperature and high-pressure environment, and the temperature of the piston head is high. When the engine load is high, there is a potential failure of thermal cracks at the mouth of the combustion chamber of the piston head, so the cooling of the piston head is very important. [0003] At present, the common cooling methods of the piston head are as follows: Figure 9 As shown, the nozzle 1 is installed on the machine body, and the position corresponding to the nozzle on the piston 2 is provided with an oil inlet passage. The piston cools down. The cooling scheme of the cooling nozzle injection method is adopted, and the oil jet sprayed by the nozzle starts to diverge after a certain distance from the nozzle, so the amount of oil sprayed into the cooling oil cha...
Claims
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IPC IPC(8): F02F3/22
CPCF02F3/22
Inventor 刘宁黄永仲李伟王利乐吴世鹏胡忠义
Owner 广西玉柴船电动力有限公司