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Piston with double cooling oil cavities and assembly method of piston

A technology of cooling oil cavity and double cooling, applied in the direction of piston, metal processing, engine components, etc., can solve the problems of the danger of pulling the cylinder, difficult to detect the welding quality of the welding seam, affecting the cooling effect, etc., to increase the cooling effect. Effect

Pending Publication Date: 2019-12-27
BINZHOU DONGHAILONG PISTON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, an object of the present invention is to propose a piston with dual cooling oil chambers. There is no weld in the second cooling oil chamber, which solves the difficulty of detecting the welding quality of the middle weld seam and the risk of fracture due to welding problems. , the welding seam cannot be cleaned, which affects the cooling effect, and there is a danger of cylinder scuffing during the working process.

Method used

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  • Piston with double cooling oil cavities and assembly method of piston
  • Piston with double cooling oil cavities and assembly method of piston
  • Piston with double cooling oil cavities and assembly method of piston

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Embodiment 1

[0039] The present invention provides a piston with double cooling oil chambers, see attached Figure 1-10 ,include:

[0040] The piston body 1, the head of the piston body 1 is provided with a first cooling oil chamber 2 and a second cooling oil chamber groove 3 communicating with each other; the opening direction of the second cooling oil chamber groove 3 faces the direction of the small end of the connecting rod;

[0041] The steel sheet 4, the steel sheet 4 is used to close the opening of the second cooling oil chamber groove 3 to form the second cooling oil chamber, and there is no welding seam in the second cooling oil chamber, and the steel sheet 4 has an oil drain hole 41 .

[0042] The disclosure of the present invention provides a piston with double cooling oil chambers. Firstly, because the steel sheet 4 is used to close the opening of the second cooling oil chamber groove 3, there is no weld seam in the formed second cooling oil chamber, which solves the problem of...

Embodiment 2

[0044] The invention provides a piston with double cooling oil chambers, see the attached figure 1 , the shape of the inner chamber of the second cooling oil chamber groove 3 is the same as that of the piston combustion chamber, and its opening is provided with a mounting groove 31, and the steel sheet 4 is installed in the mounting groove 31 and connected with the mounting groove 31 as a whole. The shape of the inner cavity of the second cooling oil cavity groove 3 is consistent with the shape of the combustion chamber, and the wall thickness is kept uniform, which is beneficial to heat transfer. The distance from the combustion chamber to the inner cavity is guaranteed to be 5-8mm to ensure sufficient supporting area.

Embodiment 3

[0046] The invention provides a piston with double cooling oil chambers. The inner cavity shape of the second cooling oil chamber groove 3 is the same as that of the piston combustion chamber, and a mounting groove 31 is opened at the opening, and the steel sheet 4 is installed behind the mounting groove 31 It is integrated with the installation groove 31. The installation groove 31 is an annular groove, the diameter of the top of the ring groove is smaller than the diameter of the bottom, and the diameter of the top of the ring groove is 1-2mm smaller than the diameter of the steel sheet 4 . That is, the upper part of the installation groove 31 protrudes from the lower part to form a step, and the step is conducive to blocking the top of the steel sheet 4, and is convenient for connecting between the top of the steel sheet 4 and the installation groove 31.

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Abstract

The invention relates to a piston with double cooling oil cavities. The piston with double cooling oil cavities comprises a piston body, and a first cooling oil cavity groove and a second cooling oilcavity groove communicating with each other are formed in the head part of the piston body; the direction of the opening of the second cooling oil cavity groove faces the small end of a connecting rod; a steel sheet is used for sealing the opening of the second cooling oil cavity groove to form a second cooling oil cavity, no welding seam is in the second cooling oil cavity, and an oil bleed holeis formed in the steel sheet. Since the steel sheet is used for sealing the opening of the second cooling oil cavity groove, no welding seam is in the formed second cooling oil cavity, the problems that the weld quality of the middle welding seam of the welding seam is difficult to detect, the risk of fracture due to welding problems exists, the welding seam cannot be cleaned, the cooling effect is affected, and the danger of cylinder score during working exits are solved. Since the direction of the opening of the second cooling oil cavity groove faces toward the small end of the connecting rod, cooling oil in the second cooling oil cavity flows out through the oil bleed hole on the steel sheet to lubricate the small end of the connecting rod, cooling of the piston body is increased, and at the same time, the cooling effect of the small end of the connecting rod is improved.

Description

technical field [0001] The invention relates to the technical field of piston cooling, in particular to a piston with dual cooling oil chambers and an assembling method thereof. Background technique [0002] With the improvement of emission requirements and the advancement of technology, trucks, construction machinery, marine engines and generator sets are all developing in the direction of high power and high load. In these fields, steel pistons and iron pistons gradually replace aluminum alloy pistons. Most of the steel pistons are around the combustion chamber. There is a cooling oil cavity in the piston ring groove. The top of the inner cavity of the piston and the middle part of the combustion chamber are cooled by the splash of cooling oil, and the cooling effect is poor. The cast iron piston is affected by the molding method, and a cooling oil cavity is generally cast. [0003] In order to solve the above-mentioned technical problems, there is a welding type integral...

Claims

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Application Information

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IPC IPC(8): F02F3/22B23P19/00
CPCB23P19/00F02F3/22
Inventor 张伟斌纪金雨
Owner BINZHOU DONGHAILONG PISTON
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