CN210509412U - Cylinder cover of diesel engine - Google Patents
Cylinder cover of diesel engine Download PDFInfo
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- CN210509412U CN210509412U CN201921017153.1U CN201921017153U CN210509412U CN 210509412 U CN210509412 U CN 210509412U CN 201921017153 U CN201921017153 U CN 201921017153U CN 210509412 U CN210509412 U CN 210509412U
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- diesel engine
- cylinder cover
- water cavity
- cylinder head
- cover body
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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 diesel engine cylinder head, including the cylinder head body, still include: the oil injector mounting hole is arranged in the center of the inner part of the cylinder cover body and is used for mounting an oil injector; the air inlet channel and the air exhaust channel are arranged on the side surface of the oil sprayer mounting hole; and the multilayer cooling water cavity is arranged inside the cylinder cover body, so that the cylinder cover body is ensured to be cooled sufficiently at high temperature and high detonation pressure. The utility model provides an exhaust passage with low vortex ratio, which can effectively improve the inflation efficiency of the diesel engine; the fuel injector is arranged in the cylinder cover body in a centered and upright mode, so that fuel beams can be uniformly injected into a combustion chamber, and tissue combustion can be facilitated; the multi-layer casting water cavity structure, the drilling of the bottom plate and other water cooling channels in various forms ensure that the cylinder cover can be sufficiently cooled at high temperature and high detonation pressure. Meanwhile, through the reasonable design of predictability, the universal blank of the common rail diesel engine cylinder cover can be used with a common rail diesel engine cylinder cover developed subsequently, and the production cost is greatly saved.
Description
Technical Field
The utility model relates to a marine and electricity generation internal-combustion engine technical field, it is specific, relate to a diesel engine cylinder head.
Background
The cylinder cover is the main part of the diesel engine structure, is used for sealing the upper part of the engine body, forms a combustion chamber space with the piston and the cylinder sleeve, and ensures the smooth proceeding of the air inlet and exhaust processes of the diesel engine. When the cylinder cover works, the cylinder cover is not only subjected to the pretightening force of the fastening bolt, but also subjected to the explosion pressure of gas in the cylinder. In addition, the cylinder head is also subjected to alternating thermal stress under the action of high-temperature fuel gas. This, old product mainly has the following problem:
(1) the original old product cylinder cover is low in safety factor under the working condition of a high-detonation-pressure and high-power diesel engine through simulation calculation and analysis, and cannot meet the new requirements of the current market.
(2) The original cylinder cover of the old product has the defects of large volume, difficult operation, limitation of arrangement of only being suitable for an overhead camshaft and the like, and the air passage design can not meet the general requirements of a mechanical pump diesel engine and a common rail diesel engine.
Therefore, it is necessary to develop a new cylinder head having a compact structure, a good air flow structure, a high degree of reinforcement, and a good cooling effect.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a cylinder head of a diesel engine, which is a multi-layer water chamber high strength cylinder head developed for a certain diesel engine, wherein the four-valve structure and the newly designed air inlet and exhaust duct can effectively improve the air charging efficiency of the diesel engine; the fuel injector is arranged in the cylinder cover body in a centered and upright mode, so that fuel beams can be uniformly injected into a combustion chamber, and tissue combustion can be facilitated; the multi-layer casting water cavity structure, the drilling of the bottom plate and other water cooling channels in various forms ensure that the cylinder cover can be sufficiently cooled at high temperature and high detonation pressure. Meanwhile, through the reasonable design of predictability, the universal blank of the common rail diesel engine cylinder cover can be used with a common rail diesel engine cylinder cover developed subsequently, and the production cost is greatly saved.
The utility model aims at realizing through the following technical scheme:
a diesel engine cylinder head, includes the cylinder head body, still includes:
the oil injector mounting hole is arranged in the center of the inner part of the cylinder cover body and is used for mounting an oil injector;
the air inlet channel and the air exhaust channel are arranged on one side of the oil sprayer mounting hole;
and the multilayer cooling water cavity is arranged inside the cylinder cover body, so that the cylinder cover body is ensured to be cooled sufficiently at high temperature and high detonation pressure.
Further, the multilayer cooling water cavity comprises a bottom water cavity, a middle water cavity and an upper water cavity.
Further, the bottom water cavity comprises a plurality of cooling channels with drilling structures, and each cooling channel is arranged in the bottom area of the exhaust channel and the nose bridge area inside the cylinder cover body.
Furthermore, the outlet end of each cooling channel is annularly distributed around the oil injector.
Furthermore, the middle-layer water cavity comprises a plurality of cooling cavities, and the cooling cavities are distributed around the air inlet channel, the exhaust channel and the oil sprayer and used for cooling the cylinder cover body.
Furthermore, the upper water cavity is arranged around the exhaust passage, and the top of the upper water cavity is provided with a water outlet.
Further, the air inlet end of the air inlet channel is provided with an air inlet, and the outer circumference of the air inlet is provided with a concentric chamfer.
Further, an exhaust port is arranged at the exhaust end of the exhaust passage, and an eccentric chamfer is arranged on the outer circumference of the exhaust port.
Further, the cylinder cover body further comprises a lubricating oil path inside, and the lubricating oil path is communicated with the push rod chamber through a return flow channel.
Further, the air inlet and the air outlet are both arranged on a bottom plate of the cylinder cover body, and the bottom plate is of a funnel-shaped structure.
The utility model has the advantages that:
the utility model provides a low vortex ratio air passage, which can effectively improve the inflation efficiency of the diesel engine; the fuel injector is arranged in the cylinder cover body in a centered and upright mode, so that fuel beams can be uniformly injected into a combustion chamber, and tissue combustion can be facilitated; the multi-layer casting water cavity structure, the drilling of the bottom plate and other water cooling channels in various forms ensure that the cylinder cover can be sufficiently cooled at high temperature and high detonation pressure. Meanwhile, through the reasonable design of predictability, the universal blank of the common rail diesel engine cylinder cover can be used with a common rail diesel engine cylinder cover developed subsequently, and the production cost is greatly saved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a longitudinal section view of the present invention-1;
FIG. 2 is a longitudinal section view of the present invention-2;
FIG. 3 is a longitudinal section-3 of the present invention;
FIG. 4 is a top view of the present invention;
FIG. 5 is a bottom view of the present invention;
FIG. 6 is a cross sectional view of the present invention, FIG. 1;
FIG. 7 is a cross sectional view of the present invention, FIG. 2;
FIG. 8 is a cross sectional view of the present invention, FIG. 3;
FIG. 9 is a diagram showing shapes of an intake port and an exhaust port, wherein a is a diagram showing a shape of an intake port and b is a diagram showing a shape of an exhaust port.
1, an air inlet channel; 2, exhausting the gas channel; 3 bottom water cavity; 4, a middle-layer water cavity; 5, an upper water cavity; 6 lubricating oil cavity; 7, installing holes of an oil sprayer; 8, a fuel oil channel; 9 rocker arm seat mounting holes; 10 a pushrod chamber; 11 housing mounting surfaces; 12 a combustion chamber face; 13 oil pipe and bracket mounting surface; 14, measuring a blast hole; 15, eccentric chamfering of the air inlet seat; 16 concentric chamfers of the exhaust seat.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.
As shown in fig. 1-5, the utility model provides a diesel engine cylinder cover, which comprises a cylinder cover body and a fuel injector mounting hole 7 arranged in the center of the cylinder cover body and used for mounting a fuel injector, which is beneficial to uniformly injecting fuel oil into a combustion chamber and is more beneficial to organizing combustion; the air inlet channel 1 and the exhaust channel 2 are installed at the proper positions on one side of the oil sprayer installation hole 7, the air inlet end of the air inlet channel 1 is provided with 2 air inlets, the exhaust end of the exhaust channel 2 is provided with 2 exhaust ports, and the four-valve cylinder cover is a typical four-valve cylinder cover arrangement structure. As shown in fig. 9, the design structure of the air inlet channel 1 and the exhaust channel 2 is low vortex ratio, high flow coefficient, in order to adapt to the application of the mechanical pump diesel engine simultaneously, the outer circumference of the air inlet is provided with a concentric chamfer, the outer circumference of the exhaust port is provided with an eccentric chamfer, so that the universality of the mechanical pump diesel engine and the common rail diesel engine cylinder cover and the vortex ratio of a certain degree are facilitated, the serialized design of a platform model is facilitated, the production cost of parts can be reduced, meanwhile, the air inlet and the exhaust port are both arranged on the bottom plate of the cylinder cover body, in order to improve the overall strength, the bottom plate is designed into a.
And the multilayer cooling water cavity is arranged inside the cylinder cover body, so that the cylinder cover body is ensured to be cooled sufficiently at high temperature and high detonation pressure. The multilayer cooling water cavity comprises a bottom water cavity 3, a middle water cavity 4 and an upper water cavity 5.
Further, as shown in fig. 6, the bottom water cavity 3 includes a plurality of cooling channels 31 with a drilling structure, each cooling channel 31 is disposed in the bottom region of the exhaust passage 2 and the nose bridge region inside the cylinder cover, the cooling channels 31 are designed as drilling holes, where the cooling water has a fast flow rate, and can quickly take away heat, and are specially used for cooling the nose bridge region with a high heat load and the region below the exhaust passage, and the water cavities around the exhaust valve seat are communicated through the drilling holes, so as to provide a powerful guarantee for the cooling effect of the exhaust valve, and simultaneously, all water holes are finally collected to the periphery of the oil injector bush to cool the lower part of the oil injector, so that the oil injector is well cooled and sufficiently atomized in a;
as a further improvement, as shown in fig. 7, the middle water cavity 4 includes a plurality of cooling cavities, each cooling cavity is distributed around the intake duct 1, the exhaust duct 2 and the injector, and is used for cooling the cylinder cover body, the middle water cavity 4 is the largest water cavity, and plays a main role in cooling the whole cylinder cover, cooling water directly enters the middle water cavity 4 from the engine body from 3 cast oval large water holes at the bottom of the cylinder cover, so that the cooling water can be rapidly filled in most cooling cavities of the cylinder cover, and the required cooling effect can be rapidly realized, and meanwhile, the water flow in the whole cooling cavity can be rapidly circulated, so that the key role of connecting the bottom water cavity 3 with the upper water cavity 5 can be played.
As a further improvement, the upper-layer water cavity is arranged around the exhaust passage, the top of the exhaust passage is provided with a water outlet, water flow in the bottom-layer water cavity 3 is collected to the upper-layer water cavity 5 from the water cavity around the oil sprayer, the middle-layer water cavity 4 is communicated to the upper-layer water cavity through an internal casting hole, and the upper-layer water cavity 5 guides water flow to surround the periphery of the exhaust passage and finally flows out of the water outlet at the top of the cylinder cover.
Compared with the prior art in the field, the utility model discloses a middle level water cavity 4 has been covered the utility model discloses interior most area has UNICOM bottom water cavity 3 and upper water cavity 5 simultaneously, the utility model discloses a bottom water cavity 3 has increased key position cooling rate, has improved cooling efficiency, makes the utility model discloses can satisfy high temperature, high detonation pressure operating mode work, guarantee that the cylinder head can obtain sufficient cooling when high temperature high detonation pressure.
As a further improvement, as shown in fig. 9, the lubricating oil in the cylinder head is introduced from the main oil gallery of the engine body through a drill hole, enters the rocker arm seat through the oil hole, reaches the rocker arm shaft, reaches each friction pair of the valve train, finally flows into the lubricating oil cavity 6 of the cylinder head, accumulates to a certain level, flows into the push rod chamber 10 through the cast oil return channel, and finally flows into the crankshaft cavity and the oil pan through the camshaft cavity. In addition, one path of lubricating oil introduced from the engine body is used for cooling the oil injector and then returns to the lubricating oil cavity of the cylinder head through an oil return channel of the oil injector. The whole lubricating oil circuit has no external pipeline, the sealing performance is good, and the periphery of the cylinder cover is neat and attractive.
The utility model discloses a design theory of no pipelining is with lubricating oil advance, return oil passage all design inside the cylinder head, compares many pipelines around the prior art in this field's arrangement succinct more, pleasing to the eye, and the reliability is also better.
The utility model has the advantages that:
1. the variable eccentric chamfer design can be used for a low-vortex-ratio air passage of a common rail diesel engine and a variable eccentric chamfer design used for a mechanical pump diesel engine.
2. Can satisfy the high strength funnel formula bottom plate design of high temperature, high detonation pressure operating mode performance requirement, guarantee the multilayer water cavity structure that key position velocity of flow and whole cooling effect and design simultaneously, a plurality of water holes of going up are arranged and are satisfied different regional cooling demands.
3. The design of the built-in lubricating and cooling oil ducts integrates the push rod cavity, so that lubricating oil can be directly returned to the engine body oil cavity.
4. The double-layer sealing structure enables oil-water and gas to be separated and sealed, special materials and structures can be used for meeting sealing requirements of different positions, disassembly and replacement are facilitated, and the cost of a cylinder cover sealing gasket is reduced.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a diesel engine cylinder head, includes the cylinder head body, its characterized in that: further comprising:
the oil injector mounting hole is arranged in the center of the inner part of the cylinder cover body and is used for mounting an oil injector;
the air inlet channel and the air exhaust channel are arranged on the side surface of the oil sprayer mounting hole;
and the multilayer cooling water cavity is arranged inside the cylinder cover body, so that the cylinder cover body is ensured to be cooled sufficiently at high temperature and high detonation pressure.
2. The cylinder head of a diesel engine according to claim 1, wherein: the multilayer cooling water cavity comprises a bottom layer water cavity, a middle layer cooling water cavity and an upper layer water cavity.
3. A diesel engine cylinder head according to claim 2, characterized in that: the bottom water cavity comprises a plurality of cooling channels with drilling structures, and each cooling channel is arranged in the bottom area of the exhaust channel and the nose bridge area in the cylinder cover body.
4. A diesel engine cylinder head according to claim 3, characterized in that: and the outlet ends of the cooling channels are annularly distributed around the oil injector.
5. The cylinder head of the diesel engine according to claim 4, wherein: the middle-layer cooling water cavity comprises a plurality of cooling cavities, and the cooling cavities are distributed around the air inlet channel, the exhaust channel and the oil sprayer and used for cooling the cylinder cover body.
6. The cylinder head of the diesel engine according to claim 5, wherein: the upper water cavity is arranged around the exhaust passage, and the top of the upper water cavity is provided with a water outlet.
7. The cylinder head of a diesel engine according to claim 1, wherein: the air inlet end of the air inlet channel is provided with an air inlet, and the outer circumference of the air inlet is provided with an eccentric chamfer.
8. The cylinder head of a diesel engine according to claim 7, wherein: the exhaust end of the exhaust passage is provided with an exhaust port, and the outer circumference of the exhaust port is provided with a concentric chamfer.
9. The cylinder head of a diesel engine according to claim 1, wherein: the cylinder cover body further comprises a lubricating oil path inside, and the lubricating oil path is communicated with the push rod chamber through a return flow channel.
10. The cylinder head of a diesel engine according to claim 8, wherein: the air inlet and the air outlet are both arranged on the bottom plate of the cylinder cover body, and the bottom plate is of a funnel-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921017153.1U CN210509412U (en) | 2019-07-02 | 2019-07-02 | Cylinder cover of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921017153.1U CN210509412U (en) | 2019-07-02 | 2019-07-02 | Cylinder cover of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210509412U true CN210509412U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921017153.1U Active CN210509412U (en) | 2019-07-02 | 2019-07-02 | Cylinder cover of diesel engine |
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| CN (1) | CN210509412U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242435A (en) * | 2019-07-02 | 2019-09-17 | 重庆潍柴发动机有限公司 | A kind of cylinder cover for diesel engine |
| CN113719376A (en) * | 2021-09-26 | 2021-11-30 | 一汽解放汽车有限公司 | Cylinder head, cylinder head cooling system, engine and cylinder head cooling method |
-
2019
- 2019-07-02 CN CN201921017153.1U patent/CN210509412U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242435A (en) * | 2019-07-02 | 2019-09-17 | 重庆潍柴发动机有限公司 | A kind of cylinder cover for diesel engine |
| CN113719376A (en) * | 2021-09-26 | 2021-11-30 | 一汽解放汽车有限公司 | Cylinder head, cylinder head cooling system, engine and cylinder head cooling method |
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