CN218235285U - Exhaust passage and engine - Google Patents
Exhaust passage and engine Download PDFInfo
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- CN218235285U CN218235285U CN202222710777.XU CN202222710777U CN218235285U CN 218235285 U CN218235285 U CN 218235285U CN 202222710777 U CN202222710777 U CN 202222710777U CN 218235285 U CN218235285 U CN 218235285U
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Abstract
The utility model provides an exhaust passage, wherein a cylinder cover bolt mounting hole is arranged at the edge of a cylinder cover in the exhaust direction, and a first exhaust passage and a second exhaust passage on the cylinder cover are combined and converged to form a converging passage; the first exhaust passage is provided with a first central line along the exhaust trend of the first exhaust passage, the second exhaust passage is provided with a second central line along the exhaust trend of the second exhaust passage, and the first central line and the second central line are intersected to form a meeting angle; the confluence outlet of the confluence channel is an exhaust passage outlet arranged on the side part of the cylinder cover. The first exhaust passage and the second exhaust passage form a confluence passage on one side of the cylinder head bolt mounting hole, and the exhaust heat acts on the cylinder head bolt mounting hole Kong Shance through the avoidance arrangement structure of the second exhaust passage and the cylinder head bolt mounting hole, so that the cooling structure of the cylinder head can be arranged on the other side of the cylinder head bolt mounting hole, the effectiveness of the cylinder head mounting structure is effectively improved while the exhaust is ensured, and the stable structure of the cylinder head is ensured. The utility model also provides an engine of having above-mentioned exhaust passage.
Description
Technical Field
The utility model relates to an engine technical field, more specifically say, relate to an exhaust passage and engine.
Background
With stricter laws and regulations and more importance of society on energy, people put higher demands on the reliability and performance of diesel engines. As shown in FIG. 1, the layout of the cylinder exhaust structure of the existing diesel engine is that 6 cylinder head bolts 2 'are connected with a cylinder body, and an exhaust passage 1' adopts a parallel air passage layout structure. When the cylinder cover is installed, the cylinder cover can be connected with the cylinder body by adopting 6 cylinder cover bolts in the circumferential direction of the cylinder, and when the double-exhaust-passage arrangement is carried out, the arrangement of the parallel exhaust passages, namely the arrangement of two separated exhaust passages on the exhaust port is the most ideal arrangement. However, in the cylinder, due to the high exhaust temperature, the head bolt 2' sandwiched between the two exhaust passages is liable to fail at high temperature, and it is difficult to achieve effective head cooling.
Therefore, how to improve the structural stability in the cylinder head exhaust process is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an exhaust passage to guarantee structural stability in the cylinder cap exhaust process; the utility model also provides an engine.
In order to achieve the above object, the utility model provides a following technical scheme:
an exhaust passage comprises a first exhaust passage and a second exhaust passage which are arranged on a cylinder cover, wherein a cylinder cover bolt mounting hole is formed in the edge of the cylinder cover in the exhaust direction;
the first exhaust passage and the second exhaust passage are combined and converged to the same side of the cylinder cover bolt mounting hole to form a converging passage;
the first exhaust passage is provided with a first central line along the exhaust trend of the first exhaust passage, the second exhaust passage is provided with a second central line along the exhaust trend of the second exhaust passage, and the first central line and the second central line are intersected to form an intersection angle;
and a confluence outlet of the confluence channel is an exhaust passage outlet arranged on the side part of the cylinder cover.
Preferably, in the exhaust passage, the second exhaust passage obliquely avoids the cylinder head bolt mounting hole, and is converged and conducted to the converging passage, and the intersection angle is an acute angle.
Preferably, in the exhaust passage, one end of the first exhaust passage, which is communicated with the confluence passage, has a first flow area, one end of the second exhaust passage, which is communicated with the confluence passage, has a second flow area, and the first flow area is larger than the second flow area.
Preferably, in the exhaust passage, a connection line between a center of a first passage inlet of the first exhaust passage and a center of a second passage inlet of the second exhaust passage is a passage connection line, the passage connection line is parallel to a cylinder head main axis of the cylinder head, and a total flow area of the two passage inlets is a third flow area;
the third flow area is greater than a sum of the first flow area and the second flow area.
Preferably, in the exhaust passage, the confluence outlet has a fourth flow area, and the fourth flow area is smaller than the sum of the first flow area and the second flow area.
Preferably, in the exhaust passage, the confluence outlet is a square confluence outlet, and the confluence passage is a variable-diameter exhaust passage which is variable in diameter from a circular passage to a square passage and exhausts the gas.
Preferably, in the exhaust passage, a flow area of the first exhaust passage from the first passage inlet to a confluence inlet position of the confluence passages is kept consistent; the flow area of the second exhaust passage from the second air passage inlet to the position of the confluence inlet is gradually reduced.
Preferably, in the exhaust passage, the flow area of the confluence passage from the confluence inlet position to the confluence outlet is gradually reduced.
An engine comprises a cylinder cover and a cylinder body, wherein a plurality of cylinders are arranged between the cylinder cover and the cylinder body, and an exhaust passage of each cylinder is the exhaust passage as described above.
Preferably, in the engine, an outlet of the exhaust passage of the cylinder head is connected with an exhaust pipe, and the exhaust pipe is provided with a square sealing flange matched with a confluence outlet of the exhaust passage.
The utility model provides an exhaust passage, a first exhaust passage and a second exhaust passage are arranged on a cylinder cover of the exhaust passage, and a cylinder cover bolt mounting hole is arranged at the edge of the cylinder cover in the exhaust direction; the first exhaust passage and the second exhaust passage are combined and converged to the same side of the cylinder cover bolt mounting hole to form a converging passage, the first exhaust passage is provided with a first central line along the exhaust trend of the first exhaust passage, the second exhaust passage is provided with a second central line along the exhaust trend of the second exhaust passage, and the first central line and the second central line are intersected to form a converging angle; the confluence outlet of the confluence channel is an exhaust passage outlet arranged on the side part of the cylinder cover. The first exhaust passage and the second exhaust passage form a confluence passage on one side of the cylinder cover bolt mounting hole, and the exhaust heat acts on the cylinder cover bolt mounting Kong Shance through the avoidance arrangement structure of the second exhaust passage and the cylinder cover bolt mounting hole, so that the cooling structure of the cylinder cover can be arranged on the other side of the cylinder cover bolt mounting hole, the effectiveness of the cylinder cover mounting structure is effectively improved while the exhaust is ensured, and the structural stability of the cylinder cover is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a layout diagram of a cylinder exhaust structure of a diesel engine;
FIG. 2 is a cross-sectional view of the exhaust direction of the top surface of the exhaust passage according to the present invention;
FIG. 3 is a cross-sectional view of the side exhaust direction of the exhaust passage according to the present invention;
FIG. 4 is a schematic view of the exhaust side structure of the exhaust passage according to the present invention.
Detailed Description
The utility model discloses an exhaust passage, which ensures the structural stability in the exhaust process of a cylinder cover; the utility model also provides an engine.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 2-4, fig. 2 is a cross-sectional structure diagram of the exhaust direction of the top surface of the exhaust passage provided by the present invention; FIG. 3 is a cross-sectional view of the side exhaust direction of the exhaust passage according to the present invention; FIG. 4 is a schematic view of the exhaust side structure of the exhaust passage according to the present invention.
The embodiment provides an exhaust passage, wherein a cylinder cover 1 of the exhaust passage is provided with a first exhaust passage 11 and a second exhaust passage 12, and the edge of the cylinder cover 1 in the exhaust direction is provided with a cylinder cover bolt mounting hole 2; the first exhaust passage 11 and the second exhaust passage 12 are combined and converged to the same side of the cylinder head bolt mounting hole to form a converging passage; the first exhaust passage 11 is provided with a first central line along the exhaust trend, the second exhaust passage 12 is provided with a second central line along the exhaust trend, and the first central line and the second central line are intersected to form a meeting angle 13; the confluence outlet 7 of the confluence passage 8 is an exhaust passage outlet arranged at the side of the cylinder head 1. 3 side of admitting air of cylinder cap 1 sets up inlet channel, exhaust side 4 sets up exhaust passage, to the cylinder structure of two air inlets and double exhaust ports, all have two air flue access & exit, form conflux passageway 8 with first exhaust passage 11 and second exhaust passage 12 in one side of cylinder cap bolt mounting hole 2, through dodging arrangement structure of second exhaust passage 12 and cylinder cap bolt mounting hole 2, make the exhaust heat act on 2 unilateral in cylinder cap bolt mounting hole, the cooling structure of cylinder cap 1 can arrange in the opposite side of cylinder cap bolt mounting hole 2, when guaranteeing to exhaust, the validity of cylinder cap mounting structure has effectively been carried out, guarantee cylinder cap stable in structure.
In one embodiment, the first exhaust passage 11 has a first center line 14 along the exhaust direction, the second exhaust passage 12 has a second center line along the exhaust direction, the first center line 14 and the second center line intersect to form an intersection angle 13, the intersection angle 13 has an angle θ, and the intersection angle 13 is an acute angle. First exhaust passage 11 and second exhaust passage 12 adopt the cross confluence structure, and at the two intersection position, produce mutual interference easily between the exhaust, influence the exhaust smoothness nature to the first central line 14 of the two exhaust direction is the main direction of exhaust, controls the intersection angle 13 of the intersection position of first exhaust passage 11 and second exhaust passage 12, through setting up intersection angle 13 as the acute angle, reduces the flow loss when the exhaust intersects. It can be understood that the intersection angle 13 should be controlled to be a smaller angle, and the distance between the second exhaust passage 12 and the cylinder head bolt mounting hole 2 needs to be considered, so that the influence of the second exhaust passage 12 on the bolt locking structure in the cylinder head bolt mounting hole 2 is minimized.
In an embodiment of the present disclosure, an end of the first exhaust passage 11 communicating with the confluence passage 8 has a first flow area 9, an area of the first flow area 9 is S1, an end of the second exhaust passage 12 communicating with the confluence passage 8 has a second flow area 10, an area of the second flow area 10 is S2, and the first flow area 9 is larger than the second flow area 10, that is, S1> S2. The first exhaust passage 11 and the second exhaust passage 12 converge to the converging passage 8 to exhaust together, and before the flow in each exhaust passage converges, the flow area of the flow affects the flow stability when the two exhaust passages converge.
In the embodiment, a first exhaust passage 11 is used as a main exhaust passage, a second exhaust passage 12 is used as a secondary exhaust passage, the first exhaust passage 11 and the second exhaust passage 12 have the same flow area at the passage inlets in a cylinder, the first exhaust passage 11 is provided with a first flow area 9 at a confluence inlet position, the second exhaust passage 12 is provided with a second flow area 10 at a confluence inlet, in order to reduce the influence of the confluence of the two exhaust passages on the stability of airflow, the first flow area 9 is set to be larger than the second flow area 10, and preferably, the flow areas of the first exhaust passage 11 from the first passage inlet to the confluence inlet position are kept consistent; the second exhaust duct 12 is arranged with a tapering flow area from the second duct inlet to the location of the merging inlet.
In the exhaust process of the cylinder, more airflow enters the first exhaust passage 11, less airflow enters the second exhaust passage 12, the proportion of the first flow area 9 and the second flow area 10 is adjusted according to parameters such as air resistance and flow coefficient when the airflows converge, and the flow area of the first exhaust passage 11 and the second exhaust passage 12 at the position of a convergence inlet is controlled, so that the exhaust volume of the main air passage is increased, the exhaust volume of the auxiliary air passage is reduced, the air resistance is integrally reduced, and the exhaust loss in the convergence process is reduced.
Further, a connecting line of centers of a first air passage inlet of the first exhaust passage 11 and a second air passage inlet of the second exhaust passage 12 is an air passage connecting line 6, the air passage connecting line 6 is parallel to a cylinder head main axis 5 of the cylinder head 1, and a total flow area of the two air passage inlets is a third flow area 15, and if a position indicated in fig. 3 is an area S3 of one air passage inlet, an area of the third flow area 15 is 2S3; the third flow area 15 is larger than the sum of the first flow area 9 and the second flow area 10. The position of the third flow area 15 is shown by the position of the first or second port inlet on the cylinder head bottom surface 17, which refers to the flow area of the exhaust valve seat insert 16, and the third flow area 15 is the sum of the flow areas of the two port inlets, the first and second port inlets.
Considering the airflow loss generated by the first exhaust passage 11 and the second exhaust passage 12 during confluence, according to the cylinder exhaust structure, the air passage connecting line 6 of the first air passage inlet and the second air passage inlet is parallel to the main axis 5 of the cylinder cover, the total flow area of the two air passage inlets of the first air passage inlet and the second air passage inlet is set as the third flow area 15, and the third flow area 15 is set to be larger than the sum of the first flow area 9 and the second flow area 10, namely 2S3 is larger than S1+ S2, so that the airflow flow area of the exhaust gas is gradually reduced before the exhaust gas enters the confluence passage 8, the airflow is accelerated, the airflow speed is improved by controlling the exhaust passage structure to balance the airflow energy loss of the airflow confluence, and the stability of the exhaust gas is ensured.
Preferably, the exhaust flow area of the first exhaust passage 11 is kept consistent, and the second exhaust passage 12 is designed to be a converging inlet tapered structure from the inlet of the second exhaust passage to the converging passage 8, so that the airflow converging interference is reduced, the airflow flow stability is ensured, the airflow velocity jump is reduced, and the generation of an air resistance structure is avoided.
In one embodiment of the present invention, the confluence outlet 7 has a fourth flow area 18 with an area S4, the fourth flow area 18 being smaller than the sum of the first flow area 9 and the second flow area 10. I.e., S4 < S1+ S2. The passageway 8 that converges is arranged by converging the flow area convergent of entry position to outlet 7 that converges, it adopts convergent structural design to converge passageway 8 on the whole, make carminative overall structure be S4 < S1+ S2 < 2S3, namely, the exhaust flow area of cylinder is the convergent structural design on the whole, the exhaust state is all with higher speed to the exhaust process of air current, thereby reduce the flow loss that brings because the change of 12 exhaust structure of second exhaust passage, make the air current wholly pass through main air duct, reduce the gas flow of vice air flue, and through convergent exhaust structure, the air current energy loss that balanced confluence structure brought.
In one embodiment of the present disclosure, the confluence output 7 is a square confluence output, and the confluence channel 8 is a variable diameter exhaust channel that is variable from a circular channel to a square channel for exhausting. The cylinder is for the export 7 that converges of the passageway 8 of converging in the exhaust passage export on cylinder cap 1, it sets up to square outlet of converging to converge the export 7 of converging the export, the passageway 8 that converges reduces to the square export of converging of the export 7 of converging from the circular passageway of the entry that converges, on the one hand easily arrange the flange structure in the hookup location of blast pipe and cylinder cap 1 and improve mounting structure stability, on the other hand make full use of cylinder cap lateral part's space, improve the maximum area of single outlet of converging, reduce the area difference of third flow area 15 and fourth flow area 18, reduce the air resistance that the increase of flow area difference brought because the structure that converges leads to, improve exhaust capacity.
Based on the exhaust passage structure that provides in the above-mentioned embodiment, the utility model also provides an engine, including cylinder cap and cylinder body, be provided with a plurality of cylinders between the two, the exhaust passage of every cylinder is the exhaust passage that provides in the above-mentioned embodiment.
Because the engine adopts the exhaust passage structure of the above embodiment, please refer to the above embodiment for the beneficial effects brought by the exhaust passage structure of the engine.
In this embodiment, the exhaust passage outlet of the cylinder cover is connected with an exhaust pipe, and the exhaust pipe is provided with a square-mouth sealing flange matched with the confluence outlet of the exhaust passage. Because the export of converging sets up to square outlet of converging, sets up sealing flange into square mouthful sealing flange, guarantees seal structure intensity, simultaneously, sets up the blast pipe entry of blast pipe into the reducing structure of square mouthful reducing for the round mouth, guarantees cylinder cap and blast pipe exhaust structure's smooth transition, further guarantees carminative smooth and easy nature.
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 (10)
1. The exhaust passage is characterized by comprising a first exhaust passage and a second exhaust passage which are arranged on a cylinder cover, wherein a cylinder cover bolt mounting hole is formed in the edge of the cylinder cover in the exhaust direction;
the first exhaust passage and the second exhaust passage are combined and converged to the same side of the cylinder cover bolt mounting hole to form a converging passage;
the first exhaust passage is provided with a first central line along the exhaust trend of the first exhaust passage, the second exhaust passage is provided with a second central line along the exhaust trend of the second exhaust passage, and the first central line and the second central line are intersected to form a meeting angle;
the confluence outlet of the confluence passage is an exhaust passage outlet arranged on the side part of the cylinder cover.
2. The exhaust passage according to claim 1, wherein the second exhaust passage obliquely bypasses the bolt mounting hole of the cylinder head and is converged and conducted to the converging passage, and the intersection angle is an acute angle.
3. The exhaust passageway according to claim 2, wherein an end of said first exhaust passageway in communication with said joining passageway has a first flow area and an end of said second exhaust passageway in communication with said joining passageway has a second flow area, said first flow area being greater than said second flow area.
4. An exhaust passage according to claim 3, characterized in that the line between the centre of the first passage inlet of the first exhaust passage and the centre of the second passage inlet of the second exhaust passage is a passage line, the passage line is parallel to the main axis of the cylinder head, and the total flow area of the two passage inlets is a third flow area;
the third flow area is greater than a sum of the first flow area and the second flow area.
5. The stack of claim 4, wherein the outlet manifold has a fourth flow area that is less than the sum of the first flow area and the second flow area.
6. The exhaust passage according to claim 5, wherein the confluence outlet is a square confluence outlet, and the confluence passage is a reducing exhaust passage which reduces from a round passage to a square passage for exhausting.
7. The exhaust stack of claim 6, wherein a flow area of the first exhaust stack from the first stack inlet to a location of a confluence inlet of the confluence passages is maintained uniform; the flow area of the second exhaust passage from the second air passage inlet to the position of the confluence inlet is gradually reduced.
8. The exhaust stack of claim 7, wherein the flow area of the joining channel from the joining inlet location to the joining outlet is tapered.
9. An engine comprising a cylinder head and a cylinder block with a plurality of cylinders disposed therebetween, wherein an exhaust passage of each of said cylinders is an exhaust passage according to any one of claims 1 to 8.
10. The engine of claim 9, characterized in that an exhaust pipe is connected to the outlet of the exhaust passage of the cylinder head, and the exhaust pipe is provided with a square sealing flange matched with the confluence outlet of the exhaust passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222710777.XU CN218235285U (en) | 2022-10-14 | 2022-10-14 | Exhaust passage and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222710777.XU CN218235285U (en) | 2022-10-14 | 2022-10-14 | Exhaust passage and engine |
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| CN218235285U true CN218235285U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222710777.XU Active CN218235285U (en) | 2022-10-14 | 2022-10-14 | Exhaust passage and engine |
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| CN (1) | CN218235285U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117552884A (en) * | 2024-01-12 | 2024-02-13 | 潍柴动力股份有限公司 | Engine cylinder cover and engine |
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2022
- 2022-10-14 CN CN202222710777.XU patent/CN218235285U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117552884A (en) * | 2024-01-12 | 2024-02-13 | 潍柴动力股份有限公司 | Engine cylinder cover and engine |
| CN117552884B (en) * | 2024-01-12 | 2024-04-16 | 潍柴动力股份有限公司 | Engine cylinder cover and engine |
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