CN214741710U - Cylinder cover spiral air passage of vertical single-cylinder diesel engine - Google Patents
Cylinder cover spiral air passage of vertical single-cylinder diesel engine Download PDFInfo
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- CN214741710U CN214741710U CN202120878887.XU CN202120878887U CN214741710U CN 214741710 U CN214741710 U CN 214741710U CN 202120878887 U CN202120878887 U CN 202120878887U CN 214741710 U CN214741710 U CN 214741710U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a vertical single cylinder diesel cylinder cap spiral air flue, it includes: the air flow inlet, the direct flow channel, the spiral channel and the air flow outlet are communicated in sequence. The cross-sectional dimension of the air inlet is 44mm multiplied by 49mm, and the minimum cross-sectional area in the spiral channel is 1800mm2And under the conditions that the radius R of the spiral is 40.5mm and the end angle A of the spiral is 25 degrees, the spiral air passage of the cylinder cover of the vertical single-cylinder diesel engine obtains the optimal size parameter. Can obtain proper air inlet channel vortex ratio, larger air inlet flow coefficient, and can be matched with combustion system, combustion chamber and fuel injection to implement high powerEnergy saving and environmental protection requirements such as rate, low oil consumption, low emission and the like.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to vertical single cylinder diesel cylinder cap spiral air flue.
Background
At present, a vertical single-cylinder diesel engine usually adopts a spiral air passage, and the spiral air passage is in a spiral curved surface shape. When the suction stroke of the diesel engine starts, the air passage inlet is opened, air flow enters the spiral air inlet passage from the air passage inlet, generates vortex flow when passing through the spiral chamber, and keeps the vortex flow to enter the combustion chamber through the air passage outlet under the action of inertia to continue spiral flow.
In the development process of the diesel engine, the appropriate air inlet channel swirl ratio and the larger flow coefficient are matched with a combustion system, a combustion chamber and oil injection, so that the energy-saving and environment-friendly requirements of high power, low oil consumption, low emission and the like can be met. Therefore, how to design the air passage of the cylinder cover of the diesel engine, which can meet the requirements, becomes a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a vertical single cylinder diesel cylinder cap spiral air flue, it can improve above-mentioned problem.
The embodiment of the utility model is realized like this:
the utility model provides a vertical single cylinder diesel cylinder cap spiral air flue, it includes:
the air flow inlet, the direct flow channel, the spiral channel and the air flow outlet are sequentially communicated;
the cross section of the airflow inlet is rectangular, and the size of the cross section of the airflow inlet is 44mm multiplied by 49 mm.
In an alternative embodiment of the invention, the area of the smallest cross-section in the spiral channel is 1800mm2。
It can be understood that as the minimum cross-sectional area in the spiral channel increases, the flow coefficient increases, the minimum cross-sectional area increases, resulting in a decrease in the rotational arm of force of the gas flow entering the spiral section, a decrease in the generated momentum moment, a decrease in the flow resistance of the gas flow, a decrease in the swirl ratio and thus an increase in the flow coefficient. Experiments prove that in a certain range, along with the increase of the minimum section area, the swirl ratio is reduced and the flow coefficient is increased; increase to 1800mm2Then, as the minimum cross-sectional area continues to increase, the swirl ratio increases,the flow coefficient decreases.
In an alternative embodiment of the present invention, the spiral radius R of the spiral channel is 40.5 mm.
It can be understood that the influence of the change of the spiral radius R on the flow performance of the air passage is complex, and in a certain range, the flow coefficient is lower and the vortex ratio is high because the spiral radius R is smaller, the flow section area of the spiral section is small, the gas flow speed is high and the flow loss is large; after the radius R of the spiral is increased, the flow area of the spiral section is fully utilized, the gas passing capacity is rapidly enhanced, the gas flow velocity is reduced, the flow loss is reduced, the flow coefficient is increased, and the swirl ratio is reduced. Through experiments, a suitable helix radius R for this model was found to be 40.5 mm.
In an alternative embodiment of the present invention, the spiral termination angle a of the spiral channel is 25 °.
It can be understood that as the spiral termination angle A increases, the flow coefficient of the air passage increases firstly, and after the flow coefficient reaches 25 degrees, the flow coefficient decreases with the continuous increase of the spiral termination angle A; the change trend of the swirl ratio is just opposite to the flow coefficient, and the swirl ratio tends to decrease first and then increase along with the increase of the spiral termination angle A, so that the spiral termination angle A suitable for the machine type is found to be 25 degrees through experiments.
Has the advantages that:
the utility model discloses a vertical single cylinder diesel cylinder cap spiral air flue, it includes: the air flow inlet, the direct flow channel, the spiral channel and the air flow outlet are communicated in sequence. The cross-sectional dimension of the air inlet is 44mm multiplied by 49mm, and the minimum cross-sectional area in the spiral channel is 1800mm2And under the conditions that the radius R of the spiral is 40.5mm and the end angle A of the spiral is 25 degrees, the spiral air passage of the cylinder cover of the vertical single-cylinder diesel engine obtains the optimal size parameter. The appropriate air inlet channel vortex ratio and the large flow coefficient can be obtained, and the air inlet channel vortex ratio and the large flow coefficient are matched with a combustion system, a combustion chamber and oil injection, so that the energy-saving and environment-friendly requirements of high power, low oil consumption, low emission and the like are met.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a spiral air passage of a cylinder head of a vertical single cylinder diesel engine provided by the present invention;
FIG. 2 is a first perspective plan view of the helical air passage of the cylinder head of the vertical single cylinder diesel engine shown in FIG. 1;
fig. 3 is a plan view of the spiral duct of the cylinder head of the vertical single cylinder diesel engine shown in fig. 1 from a second perspective.
Reference numerals:
the air flow inlet 10, the straight flow channel 20, the spiral channel 30 and the air flow outlet 40.
Detailed Description
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 of the 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.
As shown in fig. 1, the utility model provides a vertical single cylinder diesel cylinder cap spiral air flue, it includes: the air flow inlet 10, the straight flow channel 20, the spiral channel 30 and the air flow outlet 40 are communicated in sequence. The cross section of the air flow inlet 10 is rectangular, and the cross section of the air flow inlet 10 is 44mm × 49 mm.
In an alternative embodiment of the invention, the area of the smallest cross-section in the spiral channel 30 is 1800mm2。
It will be appreciated that as the minimum cross-sectional area in the spiral passage 30 increases, flow occursThe flow coefficient is increased, the minimum cross-sectional area is increased, the rotating force arm of the airflow entering the spiral section is reduced, the generated momentum moment is reduced, the airflow flowing resistance is reduced, the vortex ratio is reduced, and therefore the flow coefficient is increased. Experiments prove that in a certain range, along with the increase of the minimum section area, the swirl ratio is reduced and the flow coefficient is increased; increase to 1800mm2Then, as the minimum cross-sectional area continues to increase, the swirl ratio increases and the flow coefficient decreases.
In an alternative embodiment of the invention, as shown in fig. 2, the spiral radius R of the spiral channel 30 is 40.5 mm.
It can be understood that the influence of the change of the spiral radius R on the flow performance of the air passage is complex, and in a certain range, the flow coefficient is lower and the vortex ratio is high because the spiral radius R is smaller, the flow section area of the spiral section is small, the gas flow speed is high and the flow loss is large; after the radius R of the spiral is increased, the flow area of the spiral section is fully utilized, the gas passing capacity is rapidly enhanced, the gas flow velocity is reduced, the flow loss is reduced, the flow coefficient is increased, and the swirl ratio is reduced. Through experiments, a suitable helix radius R for this model was found to be 40.5 mm.
In an alternative embodiment of the invention, as shown in fig. 3, the helical termination angle a of the helical channel 30 is 25 °.
It can be understood that as the spiral termination angle A increases, the flow coefficient of the air passage increases firstly, and after the flow coefficient reaches 25 degrees, the flow coefficient decreases with the continuous increase of the spiral termination angle A; the change trend of the swirl ratio is just opposite to the flow coefficient, and the swirl ratio tends to decrease first and then increase along with the increase of the spiral termination angle A, so that the spiral termination angle A suitable for the machine type is found to be 25 degrees through experiments.
Has the advantages that:
the utility model discloses a vertical single cylinder diesel cylinder cap spiral air flue, it includes: the air flow inlet 10, the straight flow channel 20, the spiral channel 30 and the air flow outlet 40 are communicated in sequence. The cross-sectional dimension of the airflow inlet 10 is 44mm × 49mm, and the minimum cross-sectional area of the spiral passage 30 is 1800mm2The radius R of the helix is 40.5mm, and the terminating angle A of the helix is 2Under the condition of 5 degrees, the spiral air passage of the cylinder cover of the vertical single-cylinder diesel engine obtains the optimal size parameter. The appropriate air inlet channel vortex ratio and the large flow coefficient can be obtained, and the air inlet channel vortex ratio and the large flow coefficient are matched with a combustion system, a combustion chamber and oil injection, so that the energy-saving and environment-friendly requirements of high power, low oil consumption, low emission and the like are met.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a vertical single cylinder diesel cylinder cap spiral air flue which characterized in that includes:
the air flow inlet, the direct flow channel, the spiral channel and the air flow outlet are sequentially communicated;
the cross section of the airflow inlet is rectangular, and the size of the cross section of the airflow inlet is 44mm multiplied by 49 mm.
2. The spiral air passage of the cylinder cover of the vertical single cylinder diesel engine according to claim 1,
the area of the smallest cross section in the spiral channel is 1800mm2。
3. The spiral air passage of the cylinder cover of the vertical single cylinder diesel engine as claimed in claim 2,
the spiral radius R of the spiral channel is 40.5 mm.
4. The spiral air passage of the cylinder cover of the vertical single cylinder diesel engine according to claim 3,
the spiral termination angle a of the spiral channel is 25 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120878887.XU CN214741710U (en) | 2021-04-27 | 2021-04-27 | Cylinder cover spiral air passage of vertical single-cylinder diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120878887.XU CN214741710U (en) | 2021-04-27 | 2021-04-27 | Cylinder cover spiral air passage of vertical single-cylinder diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214741710U true CN214741710U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120878887.XU Active CN214741710U (en) | 2021-04-27 | 2021-04-27 | Cylinder cover spiral air passage of vertical single-cylinder diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214741710U (en) |
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2021
- 2021-04-27 CN CN202120878887.XU patent/CN214741710U/en active Active
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