CN208870923U - The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging - Google Patents
The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging Download PDFInfo
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- CN208870923U CN208870923U CN201821233786.1U CN201821233786U CN208870923U CN 208870923 U CN208870923 U CN 208870923U CN 201821233786 U CN201821233786 U CN 201821233786U CN 208870923 U CN208870923 U CN 208870923U
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Abstract
The utility model discloses a kind of medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging.The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of the high pressure-charging includes: trunnion, rod journal and crank arm, and one trunnion, a rod journal and a crank arm form a crank throw；The diameter of the trunnion and the ratio of cylinder diameter are 0.84~0.90；The diameter of the rod journal and the ratio of cylinder diameter are 0.71~0.75；The thickness of the crank arm and the ratio of cylinder diameter are as follows: 0.25~0.3；The fillet of the trunnion and connecting rod neck is all made of secondary rolled technique, and is quenched.The material of the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of the high pressure-charging uses spheroidal graphite cast-iron, by the improvement of technique, material to crankshaft main structure parameters, axle journal quenching and fillet rolling, improves its structural strength, can bear higher detonation pressure.
Description
Technical field
The utility model is about engine art, especially with regard to a kind of medium-and-large-sized diesel engine spheroidal graphite cast-iron song of high pressure-charging
Axis.
Background technique
Crankshaft is most important part in engine.It bears the power that connecting rod transmits, and is transformed into torque and passes through song
Axis exports and other attachmentes on engine is driven to work.Crankshaft generally by trunnion, rod journal, crank, balance weight, front end and
The composition such as rear end.One trunnion, a rod journal and a crank constitute a crank throw.
The crankshaft strength of existing V-type diesel is not high, needs to reinforce in structure and process aspect.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
The purpose of this utility model is to provide a kind of simple and reasonable medium-and-large-sized diesel engine spheroidal graphite cast-iron of high pressure-charging
The material of crankshaft, the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of the high pressure-charging uses spheroidal graphite cast-iron, by joining to crankshaft primary structure
The improvement of the technique, material of number, axle journal quenching and fillet rolling, improves its structural strength, can bear higher detonation pressure.
To achieve the above object, the utility model provides a kind of medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging, packet
Include: trunnion, rod journal and crank arm, one trunnion, a rod journal and a crank arm form a song
It turns；The diameter of the trunnion and the ratio of cylinder diameter are 0.84~0.90；The diameter of the rod journal and the ratio of cylinder diameter are
0.71~0.75；The thickness of the crank arm and the ratio of cylinder diameter are as follows: 0.25~0.3；The fillet of the trunnion and connecting rod neck
It is all made of secondary rolled technique, and is quenched.
In a preferred embodiment, the rolling radius of corner of trunnion is the 3.6-5% of main journal diameter；The company
The rolling radius of corner of bar neck is the 3.6-5% of connecting rod neck diameter.
It in a preferred embodiment, is pre- rolling to the first time rolling of the fillet of the trunnion and connecting rod neck,
Rolling power is 4MPa-40MPa, and the rolling time is 3s-5s；Second rolling power is 1.5-2 times for rolling power for the first time, when rolling
Between be 5-8s.
In a preferred embodiment, the quenching hardness of trunnion and connecting rod neck is 53-60HRC.
Compared with prior art, the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging according to the present utility model has as follows
The utility model has the advantages that the material of the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of the high pressure-charging uses spheroidal graphite cast-iron, by mainly tying to crankshaft
The improvement of the technique, material of structure parameter, axle journal quenching and fillet rolling, improves its structural strength, can bear higher
Detonation pressure.
Detailed description of the invention
Fig. 1 is shown according to the structure of the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging of one embodiment of the utility model
It is intended to.
Fig. 2 is the portion the A enlarged structure schematic diagram of Fig. 1.
Fig. 3 is the portion the B enlarged structure schematic diagram of Fig. 1.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, according to the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging of the preferred embodiments of the present invention
Specific structure include: trunnion 1, rod journal 2 and crank arm 3.Wherein, 1, rod journal 2 and one of a trunnion
A crank arm 3 constitutes a crank throw.
(1) main design parameters of the crank throw of the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of the high pressure-charging:
Trunnion diameter d1/D (cylinder diameter) is 0.84~0.90；
Rod journal diameter d2/D is 0.71~0.75；
Crank thickness H/D are as follows: 0.25~0.3；
(2) as shown in Fig. 2, the fillet of all trunnions and connecting rod neck uses rolling technology, rounded structure is as follows:
1, rolling fillet R is the 3.6-5% of the diameter of trunnion or connecting rod neck；
2, rolling angle is 50-60 degree；
3, it is 10-30% that fillet, which sinks,；
4, arc width is 1.5-1.8 times；
5, entrance angle is 20-30 degree；
6, rolling roughness is 0.25；
7, technique:
The adjustment of the parameter of rolling and reinforcing technology carries out secondary rolled to knuckle, and rolling for the first time is pre- rolling, rolling
Pressure is 4MPa-40MPa, and the rolling time is 3s-5s.Second of rolling power is 1.5-2 times for rolling power for the first time, rolls the time
For 5-8s.
(3) as shown in figure 3, the quenching hardness of trunnion and connecting rod neck is 53-60HRC, depth 3.2-5, distance rolling
Fillet distance 0.5-1；
(4) in terms of ductile iron material
Spherulitic iron crankshaft casting needs normalized treatment, and hardness (270~320) HBW, same crankshaft difference of hardness is no more than 30HBW
Unit；
The mechanical property of materials: tensile strength is not less than 800-840MPa, elongation percentage 5-6%, and impact value is greater than 25N.m/cm.
Metallographic structure: content of pearlite in alloy is up to 90%；Nodularization type: graphite nodule is small and rounding, and Oxygen potential is at 1~3 grade, graphite
Size is 5~8 grades；Cementite and steadite binomial total amount are not more than 3%, and free cementite, steadite are respectively not more than
2%.
To sum up, the material of the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of the high pressure-charging uses spheroidal graphite cast-iron, by crankshaft master
The improvement for wanting the technique, material of structural parameters, axle journal quenching and fillet rolling, improves its structural strength, can bear
Higher detonation pressure.
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shapes
Formula is limited.
Claims (3)
1. a kind of medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging characterized by comprising trunnion, rod journal and song
Shaft arm, one trunnion, a rod journal and a crank arm form a crank throw；The diameter and cylinder of the trunnion
The ratio of diameter is 0.84~0.90；The diameter of the rod journal and the ratio of cylinder diameter are 0.71~0.75；The crank arm
The ratio of thickness and cylinder diameter are as follows: 0.25~0.3；The fillet of the trunnion and connecting rod neck is all made of secondary rolled technique, goes forward side by side
Row quenching.
2. the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging as described in claim 1, which is characterized in that the trunnion
Roll the 3.6-5% that radius of corner is main journal diameter；The rolling radius of corner of the connecting rod neck is the 3.6- of connecting rod neck diameter
5%.
3. the medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging as described in claim 1, which is characterized in that the trunnion and
The quenching hardness of connecting rod neck is 53-60HRC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821233786.1U CN208870923U (en) | 2018-08-01 | 2018-08-01 | The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821233786.1U CN208870923U (en) | 2018-08-01 | 2018-08-01 | The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208870923U true CN208870923U (en) | 2019-05-17 |
Family
ID=66463786
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821233786.1U Active CN208870923U (en) | 2018-08-01 | 2018-08-01 | The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging |
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| CN (1) | CN208870923U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591240A (en) * | 2018-08-01 | 2018-09-28 | 广西玉柴机器股份有限公司 | The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging |
-
2018
- 2018-08-01 CN CN201821233786.1U patent/CN208870923U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591240A (en) * | 2018-08-01 | 2018-09-28 | 广西玉柴机器股份有限公司 | The medium-and-large-sized nodular graphite cast iron crankshaft of diesel engine of high pressure-charging |
| CN108591240B (en) * | 2018-08-01 | 2023-11-07 | 广西玉柴机器股份有限公司 | Nodular cast iron crankshaft of high-supercharging medium-large diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230116 Address after: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Yuchai Ship Electric Power Co.,Ltd. Address before: 537005 No. 88 flyover West Road, the Guangxi Zhuang Autonomous Region, Yulin Patentee before: Guangxi Yuchai Machinery Co.,Ltd. |
|
| TR01 | Transfer of patent right |