CN210714871U - Cast-formed piston with inner-cooling oil duct structure and engine cylinder - Google Patents
Cast-formed piston with inner-cooling oil duct structure and engine cylinder Download PDFInfo
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- CN210714871U CN210714871U CN201922013779.1U CN201922013779U CN210714871U CN 210714871 U CN210714871 U CN 210714871U CN 201922013779 U CN201922013779 U CN 201922013779U CN 210714871 U CN210714871 U CN 210714871U
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Abstract
The application discloses cold oil duct structure piston in casting shaping compares with prior art, includes: a pin boss cavity; the piston inner cooling channel is communicated with the pin boss cavity, and the pin boss opening structure is communicated with the pin boss cavity; the piston inner cooling channel is communicated with the pin boss opening structure through a semi-closed channel structure. In this scheme cold passageway sets up semi-enclosed structure with the key seat junction in the piston, makes its piston key seat intensity when the engine in the work better, improves piston key seat intensity, reduces mechanical fatigue and high temperature fatigue failure risk, compares in prior art, and it can realize reducing key seat fracture risk and piston high temperature fatigue failure risk, extension piston life. The application also relates to an engine cylinder, which also has the beneficial effects.
Description
Technical Field
The application relates to the technical field of pistons, more specifically says, especially relates to a casting forming inner cooling oil duct structure piston, and this application still relates to an engine cylinder.
Background
Along with the continuous pressure boost of engine, the heat load of engine is higher and higher, especially the temperature of piston is higher and higher, and piston top temperature is too high, can make top combustion chamber edge fracture when serious, and the annular temperature is too high can make machine oil coke, causes the piston ring card to die, makes the unable normal work of engine. The common external cooling method for the supercharged engine cannot effectively reduce the temperature of the piston, particularly the temperature of the combustion edge at the top of the piston and the temperature of a ring groove, so that the conventional supercharged piston needs to be cooled internally, namely an internal cooling oil channel is arranged on the piston.
In the prior art, most pistons adopt an open oil inlet channel structure, and the main problems are that the strength of a piston pin seat is low, and the piston pin seat is easy to crack; the distance between the oil nozzle and the oil inlet hole is too large, and the cooling oil capturing efficiency is low, so that the risk of high-temperature fatigue failure of the piston is caused.
Therefore, how to provide a piston with a cast-molded inner cooling oil passage structure, which can reduce the cracking risk of a pin boss and the high-temperature fatigue failure risk of the piston and prolong the service life of a piston pin, has become a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
For solving above-mentioned technical problem, the application provides a cold oil duct structure piston in casting shaping, and it can realize reducing key seat fracture risk and the fatigue failure risk of piston high temperature, extension piston life. The application also relates to an engine cylinder, which also has the beneficial effects.
The technical scheme provided by the application is as follows:
the application provides a cold oil duct structure piston in casting shaping includes: a pin boss cavity; the piston inner cooling channel is communicated with the pin boss cavity, and the pin boss opening structure is communicated with the pin boss cavity; the piston inner cooling channel is communicated with the pin boss opening structure through a semi-closed channel structure.
Further, in a preferred mode of the present invention, the semi-closed channel structure includes: the first semi-closed oil duct and the second semi-closed oil duct are communicated with the pin boss cavity; the first semi-closed oil passage and the second semi-closed oil passage are asymmetrically arranged on two sides of the pin boss opening structure.
Further, in a preferred mode of the present invention, a first semi-closed oil passage and a first semi-closed blocking structure are provided at a position where the pin boss opening structure communicates with the first semi-closed oil passage.
Further, in a preferred mode of the present invention, the second semi-closed oil passage and the pin boss opening structure communicate with each other at a position having a second semi-closed blocking structure.
Further, in a preferred aspect of the present invention, the first semi-closed blocking structure is asymmetrically disposed on both sides of the pin boss opening structure.
Further, in a preferred aspect of the present invention, the first semi-closed oil passage is close to a bore of one end of the pin boss opening structure is larger than a bore of one end of the piston inner cooling passage.
Further, in a preferred aspect of the present invention, the second semi-closed oil passage is close to a bore of one end of the pin boss opening structure is larger than a bore of one end of the cold passage in the piston.
The application also provides an engine cylinder, which comprises the cast and molded piston with the inner cooling oil passage structure, and the beneficial effects are also achieved.
The utility model provides a pair of cold oil duct structure piston in casting shaping compares with prior art, include: a pin boss cavity; the piston inner cooling channel is communicated with the pin boss cavity, and the pin boss opening structure is communicated with the pin boss cavity; the piston inner cooling channel is communicated with the pin boss opening structure through a semi-closed channel structure. In this scheme cold passageway sets up semi-enclosed structure with the key seat junction in the piston, makes its piston key seat intensity when the engine in the work better, improves piston key seat intensity, reduces mechanical fatigue and high temperature fatigue failure risk, compares in prior art, and it can realize reducing key seat fracture risk and piston high temperature fatigue failure risk, extension piston life. The application also relates to an engine cylinder, which also has the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a cast-molded piston with an internal cooling oil passage structure provided by an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
Referring to fig. 1, a cast-molded piston with an internal cooling gallery structure according to an embodiment of the present application includes: a pin boss cavity 1; the piston inner cooling channel 2 is communicated with the pin boss cavity 1, and the pin boss opening structure 3 is communicated with the pin boss cavity 1; the piston inner cooling channel 2 is communicated with the pin boss opening structure 3 through a semi-closed channel structure.
The embodiment of the utility model provides a cold oil duct structure piston in casting shaping specifically includes: a pin boss cavity 1; the piston inner cooling channel is communicated with the pin boss cavity 1, and the pin boss opening structure 3 is communicated with the pin boss cavity; the piston inner cooling channel 2 is communicated with the pin boss opening structure 3 through a semi-closed channel structure. In this scheme cold passageway sets up semi-enclosed structure with the key seat junction in the piston, makes its piston key seat intensity when the engine in the work better, improves piston key seat intensity, reduces mechanical fatigue and high temperature fatigue failure risk, compares in prior art, and it can realize reducing key seat fracture risk and piston high temperature fatigue failure risk, extension piston life. The embodiment of the application also relates to an engine cylinder, and the engine cylinder also has the beneficial effects.
Specifically, in the embodiment of the present invention, the semi-closed channel structure includes: the first semi-closed oil passage 4 and the second semi-closed oil passage 5 are communicated with the pin boss cavity 1; the first semi-closed oil passage 4 and the second semi-closed oil passage 5 are asymmetrically arranged at two sides of the pin base opening structure 3.
The first semi-closed oil passage 4 and the second semi-closed oil passage 5 are arranged asymmetrically, the engine oil capturing rate is improved under the condition that the overall strength is not reduced, and the oil inlet and outlet holes are formed in a casting mode, so that the stress influence caused by machining is reduced.
Specifically, in the embodiment of the present invention, the position where the first semi-closed oil passage 4 communicates with the pin boss opening structure 3 has a first semi-closed blocking structure 6.
More specifically, in the embodiment of the present invention, a position where the second semi-closed oil passage 5 communicates with the pin boss opening structure 3 has a second semi-closed blocking structure 7.
Specifically, in the embodiment of the present invention, the first semi-closed blocking structure 6 and the second semi-closed blocking structure 7 are asymmetrically disposed on two sides of the pin boss opening structure 3.
Specifically, in the embodiment of the present invention, the caliber of the first semi-closed oil passage 4 near one end of the pin seat opening structure 3 is larger than the caliber near one end of the cooling channel in the piston.
More specifically, in the embodiment of the present invention, the caliber of the end of the second semi-closed oil passage 5 close to the pin seat opening structure 3 is larger than the caliber of the end close to the cold channel in the piston.
The embodiment of the application also provides an engine cylinder, which comprises the cast and formed piston with the inner cooling oil passage structure, and the beneficial effects are also achieved.
More specifically, according to the cast-molded piston with the inner cooling oil duct structure, the oil inlet channel is of a semi-closed structure, the strength of a piston pin boss is improved, the overall strength and the service life of the piston are improved, the distance between the oil inlet channel and an oil nozzle is reduced, and the engine oil capturing rate is improved, wherein the oil inlet channel is of an asymmetric structure, the sectional area of the oil inlet channel is improved, the problem that the temperature of the piston is not easy to reduce is solved, and the phenomenon that the temperature of a ring groove is too high to cause coking of the engine oil is avoided; more specifically, the oil inlet channel is formed by casting, so that the machining stress of the area is effectively reduced, the surface smoothness is improved, the surface engine oil adhesion is reduced, the rate of engine oil entering the inner cooling oil channel is improved, and compared with the prior art, the piston oil inlet channel can reduce the risk of pin boss cracking and the risk of high-temperature fatigue failure of the piston and obviously prolong the service life of the piston.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a cold oil duct structure piston in casting molding which characterized in that includes:
a pin boss cavity;
the piston inner cooling channel is communicated with the pin boss cavity, and the pin boss opening structure is communicated with the pin boss cavity;
the piston inner cooling channel is communicated with the pin boss opening structure through a semi-closed channel structure.
2. The cast molding internally cooled structural piston of claim 1, wherein the semi-enclosed channel structure includes: the first semi-closed oil duct and the second semi-closed oil duct are communicated with the pin boss cavity; the first semi-closed oil passage and the second semi-closed oil passage are asymmetrically arranged on two sides of the pin boss opening structure.
3. The cast-in-mold internally-cooled oil gallery structured piston of claim 2, wherein a location where the first semi-enclosed oil gallery communicates with the pin boss mouth structure has a first semi-enclosed barrier structure.
4. The cast-in-mold internally-cooled oil gallery structured piston of claim 3, wherein a location where the second semi-enclosed oil gallery communicates with the pin boss mouth structure has a second semi-enclosed barrier structure.
5. The cast molding inner cold oil gallery structure piston of claim 4, wherein the first semi-closed blocking structure and the second semi-closed blocking structure are disposed asymmetrically on either side of the pin boss opening structure.
6. The cast-in-mold internal cooling gallery structure piston of claim 5, wherein the first semi-enclosed gallery has a larger bore adjacent the pin boss mouth structure than an end of the first semi-enclosed gallery adjacent the piston internal cooling gallery.
7. The cast-in-mold internal cooling gallery structure piston of claim 6, wherein the bore of the second semi-enclosed gallery is larger at an end adjacent the pin boss mouth structure than at an end adjacent the internal cooling gallery of the piston.
8. An engine cylinder comprising the cast-formed internally-cooled oil structured piston of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922013779.1U CN210714871U (en) | 2019-11-20 | 2019-11-20 | Cast-formed piston with inner-cooling oil duct structure and engine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922013779.1U CN210714871U (en) | 2019-11-20 | 2019-11-20 | Cast-formed piston with inner-cooling oil duct structure and engine cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210714871U true CN210714871U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922013779.1U Active CN210714871U (en) | 2019-11-20 | 2019-11-20 | Cast-formed piston with inner-cooling oil duct structure and engine cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210714871U (en) |
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2019
- 2019-11-20 CN CN201922013779.1U patent/CN210714871U/en active Active
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