CN202431387U - Steel head and aluminum skirt combined plug for diesel engine - Google Patents
Steel head and aluminum skirt combined plug for diesel engine Download PDFInfo
- Publication number
- CN202431387U CN202431387U CN2011204897959U CN201120489795U CN202431387U CN 202431387 U CN202431387 U CN 202431387U CN 2011204897959 U CN2011204897959 U CN 2011204897959U CN 201120489795 U CN201120489795 U CN 201120489795U CN 202431387 U CN202431387 U CN 202431387U
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- skirt
- piston
- plug
- pin
- hole
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Abstract
The utility model discloses a steel head and aluminum skirt combined plug for a diesel engine. The steel head and aluminum skirt combined plug consists of parts such as a plug head, a plug skirt, a connecting screw and a plug skirt; a copper bushing in a pin hole of the plug skirt is cancelled; the pin hole of the plug skirt is designed into a special-shaped pin hole, that is, the pin hole of the plug skirt is in the shape of a combination of a cylindrical section and a flaring section; a distance L between clamping ring slots in the pin hole of the plug skirt is lengthened to 220-440 mm, and a piston pin matched with the pin hole is lengthened; and contact stress on the pin hole is reduced by increasing the contact area between the piston pin and the pin hole of the plug skirt. According to the steel head and aluminum skirt combined plug for the diesel engine disclosed by the utility model, the structure of the pin hole of the plug skirt is simplified, the risk of unstable quality of the plug is reduced and the jumping situation of the piston during use process is avoided; and the steel head and aluminum skirt combined plug for the diesel engine is suitable for railway transportation.
Description
Technical field
The utility model relates to use for diesel engine combined piston technical field.
Background technique
At present, existing a kind of use for diesel engine steel toe aluminium skirt combined piston, structure is as shown in Figure 1.It is made up of piston head, piston skirt, elastic sleeve, attachment screw, O shape circle, lining.Connect through 4 screws between piston head and the piston skirt, attachment screw passes piston skirt and elastic sleeve from the skirt bottom, is screwed in the tapped hole of piston head.In piston utilization process, for the intensity and the working life of improving the piston skirt pin-and-hole, pin-and-hole increases copper bush on structural design.Yet; The piston of this project organization is in the utilization process; Because of piston skirt pin-and-hole and lining are assembled together through interference, this machining accuracy and assembling to the two interference fit size is had higher requirement, and this will make, and the destabilizing factor of piston increases, reliability reduces.In railway transport course, several piston skirt pin-and-hole lining play faults once took place with the diesel engine of this structure piston in dress.The lining play will cause that the piston oil circuit is smooth, cooling is bad, and then make the piston bulk temperature too high.Generation the lighter of this fault will cause piston scraping, and weight person will cause the diesel engine serious damage, and it has had a strong impact on the Security of railway traffic transportation.
The model utility content
The technical problem that the utility model solved provides a kind of use for diesel engine steel toe aluminium skirt combined piston, simplifies the design of piston skirt pin-and-hole, avoids piston the cover phenomenon in the utilization process, to occur scurrying, guarantees the intensity and the working life of piston skirt pin-and-hole simultaneously.
The technological scheme that the utility model adopts is that it is φ 120mm piston skirt pin-and-hole that use for diesel engine steel toe aluminium skirt combined piston, piston diameter φ 265mm, the high 235mm in center, height overall 360mm, piston skirt are provided with diameter; The piston skirt pin-and-hole directly contacts with wrist pin, and the piston skirt pin-and-hole is a noncircular pin hole, is divided into cylindrical section and flared section; Semidiameter 0.015～the 0.050mm at the two ends of flared section, on piston skirt pin-and-hole longitudinal section, being connected with cylindrical section with flared section a little is true origin; The piston skirt pin bore axis is to being the Y axle, and Y axle forward makes progress, and perpendicular is the X axle; X axle forward is towards piston axes, then the profile line and function Y=2.07e-7X of flared section
3+ 1.25e-5X
2+ 0.0006X-4.1e-5 is consistent, and flared section length is 20～40mm.
Further, the semidiameter 0.034mm at the two ends of flared section, flared section length is 30.5mm.
Also be provided with annular groove on the piston skirt pin-and-hole, the spacing of annular groove is 220～240mm.
The beneficial effect of the utility model is that the design of simplification piston skirt pin-and-hole reduces the unsettled risk of piston mass, avoids piston the cover phenomenon in the utilization process, to occur scurrying, and then improves the whole service life and the Security of guaranteeing the railway traffic transportation of piston.
Description of drawings
Fig. 1 is the structural representation of existing diesel steel toe aluminium skirt combined piston.
Fig. 2 is an A-A direction sectional view among Fig. 1.
Fig. 3 is the improved steel toe aluminium of a utility model skirt combined piston structural representation.
Fig. 4 is an A-A direction sectional view among Fig. 3.
Fig. 5 is the improved piston skirt pin-and-hole of a utility model shape line structure schematic representation.
Be labeled as among the figure: 1-piston head, 2-O shape circle, 3-piston skirt, 4-elastic sleeve, 5-attachment screw, 6-lining, 8-annular groove.
Embodiment
The use for diesel engine steel toe aluminium skirt combined piston of the utility model is made up of parts such as piston head 1, piston skirt 3, attachment screw 5, piston skirts 4, and it is φ 120mm pin-and-hole that piston diameter φ 265mm, the high 235mm in center, height overall 360mm, piston skirt 3 are provided with diameter.Relative existing structure piston has carried out design improvement to piston skirt pin-and-hole structure and shape line and piston skirt 3 top inside support ring faces 7 shape lines.Concrete scheme is following:
(1) piston skirt pin-and-hole cancellation copper bush 6.
As shown in Figure 3, in order to satisfy the piston compatibility of deformation between wrist pin and the piston skirt pin-and-hole in the course of the work, the piston skirt pin-and-hole is designed to noncircular pin hole, promptly the piston skirt pin-and-hole is shaped as the combination of cylindrical section and flared section.As shown in Figure 3, the part two ends maximum radius of flared section differs from 0.015～0.050mm, and flared section length B is 20～40mm, and preferred parameter is: flared section two ends maximum radius difference 0.034mm, flared section length B is 30.5mm.
As shown in Figure 5, being connected with cylindrical section with flared section a little is true origin, and the piston skirt pin bore axis is to being the Y axle, Y axle forward upwards, perpendicular is the X axle, X axle forward is towards piston axes, then the profile line and function Y=2.07e-7X of flared section
3+ 1.25e-5X
2+ 0.0006X-4.1e-5 is consistent.
(2) because cancelling the contact stress that causes pin-and-hole to bear, piston skirt pin-and-hole copper bush 6 increases problem in order to remedy; The piston skirt pin-and-hole adds annular groove 8 spacing L in design and grows to 220～240mm; And the wrist pin length that has extended simultaneously and matched, as shown in Figure 4, thus the contact stress that pin-and-hole bears reduced through the area of contact that increases wrist pin and piston skirt pin-and-hole; Accept more reasonable period, and the life-span is longer.
Through calculating and testing and learn, the improvement of this piston structure has improved the reliability that piston uses greatly, and is structurally also compact more, reduced the piston cost of production.
Claims (3)
1. use for diesel engine steel toe aluminium skirt combined piston, it is φ 120mm piston skirt pin-and-hole that piston diameter φ 265mm, the high 235mm in center, height overall 360mm, piston skirt (3) are provided with diameter, it is characterized in that: the piston skirt pin-and-hole directly contacts with wrist pin; The piston skirt pin-and-hole is a noncircular pin hole, is divided into cylindrical section and flared section, the semidiameter 0.015～0.050mm at the two ends of flared section; On piston skirt pin-and-hole longitudinal section, being connected with cylindrical section with flared section a little is true origin, and the piston skirt pin bore axis is to being the Y axle; Y axle forward upwards; Perpendicular is the X axle, and X axle forward is towards piston axes, then the profile line and function Y=2.07e-7X of flared section
3+ 1.25e-5X
2+ 0.0006X-4.1e-5 is consistent, and flared section length is 20～40mm.
2. use for diesel engine steel toe aluminium skirt combined piston as claimed in claim 1, it is characterized in that: the semidiameter 0.034mm at the two ends of flared section, flared section length is 30.5mm.
3. use for diesel engine steel toe aluminium skirt combined piston as claimed in claim 1, it is characterized in that: also be provided with annular groove (8) on the said piston skirt pin-and-hole, the spacing of annular groove (8) is 220～240mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204897959U CN202431387U (en) | 2011-11-30 | 2011-11-30 | Steel head and aluminum skirt combined plug for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204897959U CN202431387U (en) | 2011-11-30 | 2011-11-30 | Steel head and aluminum skirt combined plug for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431387U true CN202431387U (en) | 2012-09-12 |
Family
ID=46780842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204897959U Expired - Lifetime CN202431387U (en) | 2011-11-30 | 2011-11-30 | Steel head and aluminum skirt combined plug for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645798A (en) * | 2022-03-14 | 2022-06-21 | 北京理工大学 | Piston pin hole bush structure |
-
2011
- 2011-11-30 CN CN2011204897959U patent/CN202431387U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645798A (en) * | 2022-03-14 | 2022-06-21 | 北京理工大学 | Piston pin hole bush structure |
| CN114645798B (en) * | 2022-03-14 | 2023-02-28 | 北京理工大学 | Piston pin hole bush structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 116021 Shahekou, Liaoning, China No. 49 The Strip Patentee after: CRRC DALIAN INSTITUTE CO., LTD. Address before: 116021 Shahekou, Liaoning, China No. 49 The Strip Patentee before: CNR Dalian Locomotive Research Institute Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191219 Address after: 116000 No. 49, central The Strip, Shahekou District, Liaoning, Dalian Co-patentee after: Dalian CRRC Zetong Machinery Co., Ltd Patentee after: CRRC DALIAN INSTITUTE CO., LTD. Address before: 116021 No. 49, central The Strip, Shahekou District, Liaoning, Dalian Patentee before: CRRC DALIAN INSTITUTE CO., LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |