CN110566360A - Cylinder head with enhanced rigidity - Google Patents
Cylinder head with enhanced rigidity Download PDFInfo
- Publication number
- CN110566360A CN110566360A CN201910883264.9A CN201910883264A CN110566360A CN 110566360 A CN110566360 A CN 110566360A CN 201910883264 A CN201910883264 A CN 201910883264A CN 110566360 A CN110566360 A CN 110566360A
- Authority
- CN
- China
- Prior art keywords
- lug
- bolt hole
- valve guide
- bottom plate
- air passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 20
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 238000004880 explosion Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a rigidity-enhanced cylinder cover which comprises a top plate, a bottom plate, more than two bolt hole lugs and a valve guide lug, wherein the top plate is arranged above the bottom plate, the bolt hole lugs are uniformly arranged on the periphery of the cylinder cover, two ends of each bolt hole lug are respectively connected with the top plate and the bottom plate, an air passage is arranged between the top plate and the bottom plate, the valve guide lug is arranged in the middle of the top plate and positioned above the air passage, a water passage is arranged between the top plate and the outer wall of the air passage and between the bottom plate and the outer wall of the air passage, one end of the outer wall of the air passage is connected with the valve guide lug, the other end of the outer wall of the air passage is arranged along the water flow direction in the water passage and extends to the bolt hole lug nearest to the valve. The invention is beneficial to enhancing the rigidity of the cylinder cover, reducing the deformation of the bottom plate of the cylinder cover, reducing the cylinder flushing gasket and reducing the abnormal wear hidden trouble of the valve mechanism.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a rigidity-enhanced cylinder cover.
Background
Along with the upgrading of the emission, the requirements on various performance indexes of the diesel engine are continuously improved. At present, the maximum detonation pressure index designed for diesel engines meeting the national Liu-b emission regulations is generally more than 20MPa, which leads to the increase of the wear failure rate of cylinder cushion and valve mechanism. Therefore, measures are required to enhance the rigidity of the cylinder head and enhance the sealing performance of the joint surface between the cylinder head and the cylinder block, thereby reducing the failure rate of the wear of the cylinder head gasket and the valve train.
It is known that there is a strain in force, and at high explosion pressures, deformation of the cylinder head is inevitable, especially at high cylinder head firing surfaces. And in the peripheral area of the cylinder cover bolt hole, the cylinder cover screw hole lug is directly compressed by the pretightening force of the bolt, so that the displacement of the cylinder cover bolt screw hole lug is relatively small.
At present, the common method for enhancing the rigidity of the cylinder cover is to thicken the thickness of a bottom plate 2 of an air sealing part or add a reinforcing rib 7 between two nail hole passing lugs of the cylinder cover, as shown in figure 3.
However, the above method has a limit to the enhancement of the rigidity of the head base plate. Under the condition of high explosion pressure, high-pressure gas pushes a fire surface of a cylinder cover to generate displacement deformation, each valve is surrounded by an air passage outer wall connected with a cylinder cover bottom plate, the air passage outer wall forms a hollow supporting column, the upper part of the hollow air passage supporting column is connected with a guide pipe lug, the cylinder cover bottom plate and the cylinder cover bottom plate are pushed by the explosion pressure to push the air passage outer wall, and the air passage outer wall pushes the guide pipe lug, so that the cylinder cover bottom plate and the guide pipe hole lug are deformed along with the explosion pressure, and the cylinder cushion and the valve mechanism are easy to generate abnormal abrasion faults when deviating from normal working.
In order to enhance the local strength of each part of the cylinder cover, chinese patent application No. CN105257423B on 11/13/2015, entitled cylinder cover, discloses a cylinder cover, which adds a plurality of reinforcing ribs at a plurality of positions of the cylinder cover to enhance the local strength of each part of the cylinder cover, thereby forming a solid frame structure between a top plate and a bottom plate. The novel cylinder cover has the disadvantages that for each cylinder, only one reinforcing rib in the four valve guide pipe lugs connects one valve guide pipe lug with the bolt hole lug, the rigidity of the novel cylinder cover is enhanced limitedly, and the deformation of the novel cylinder cover cannot be well prevented when the novel cylinder cover faces the high explosion pressure index of the national six-model.
disclosure of Invention
In order to solve the problems, the invention provides the rigidity-enhanced cylinder cover, which is beneficial to enhancing the rigidity of the cylinder cover, reducing the deformation of a cylinder cover bottom plate, reducing a cylinder flushing gasket and reducing the hidden danger of abnormal abrasion of a valve mechanism.
the invention adopts the following technical scheme to realize the purpose:
The utility model provides a cylinder head of reinforcing rigidity, includes roof, bottom plate, two above bolt hole lugs and valve pipe lug, the roof set up in the top of bottom plate, bolt hole lug evenly arranges in the periphery of cylinder head, and the both ends of every bolt hole lug are connected respectively roof and bottom plate, be equipped with the air flue between roof and the bottom plate, valve pipe lug establishes the middle part of roof and is located the top of air flue, the roof with be equipped with the water course between the air flue outer wall and the bottom plate with between the air flue outer wall, the one end of air flue outer wall is connected valve pipe lug, the other end sets up and extends to the connection ion along the direction of rivers in the water course the nearest bolt hole lug of valve pipe lug, keeps away from the bolt hole lug of air flue then connects through the strengthening rib valve pipe lug.
Preferably, the top plate and the bottom plate are integrally formed, the valve guide lug is provided with a valve guide, and the lower part of the valve guide extends into the air passage.
Preferably, the number of the valve guide lugs is four, and each two valve guide lugs are symmetrically arranged with respect to the center of the top plate.
Preferably, the bolt hole lugs are six, and each two bolt hole lugs are symmetrically arranged with respect to the center of the cylinder head.
Preferably, the number of the outer walls of the air passages is four, the number of the reinforcing ribs is two, the four outer walls of the air passages are respectively connected with the four bolt hole lugs and the valve guide lugs, and the two reinforcing ribs are respectively connected with the two bolt hole lugs and the valve guide lugs which are far away from the air passages.
The invention has the beneficial effects that:
The rigidity-enhanced cylinder cover is characterized in that the bolt hole lug and the valve guide lug are respectively connected through the reinforcing rib and the outer wall of the air passage, so that the integral rigidity of the cylinder cover is enhanced, the deformation of the fire surface of the cylinder cover is greatly reduced, the sealing performance of the air sealing part is enhanced, the deformation displacement of the valve guide lug is reduced, and the risk of abnormal abrasion of a cylinder cushion and a valve mechanism is reduced.
Drawings
FIG. 1 is a cross-sectional view of a single cylinder of the enhanced rigidity cylinder head provided by the present invention;
FIG. 2 is a cross-sectional view of a cylinder head of the present invention providing increased rigidity;
Fig. 3 is a schematic structural view of a conventional cylinder head described in the background of the invention.
In the figure, 1-top plate, 2-bottom plate, 3-air flue, 4-bolt hole lug, 41-first bolt hole lug, 42-second bolt hole lug, 43-third bolt hole lug, 44-fourth bolt hole lug, 45-fifth bolt hole lug, 46-sixth bolt hole lug, 5-valve guide lug, 51-first valve guide lug, 52-second valve guide lug, 53-third valve guide lug, 54-fourth valve guide lug, 6-air flue outer wall, 61-first air flue outer wall, 62-second air flue outer wall, 63-third air flue outer wall, 64-fourth air flue outer wall, 7-reinforcing rib, 71-first reinforcing rib, 72-second reinforcing rib, 8-valve guide, 9-valve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings 1-2 and the detailed description thereof.
Referring to fig. 1 and 2, an embodiment of the present invention provides a cylinder head with enhanced rigidity, including a top plate 1, a bottom plate 2, two or more bolt hole lugs 4, and a valve guide lug 5. Roof 1 sets up in the top of bottom plate 2, and bolt hole lug 4 evenly arranges the periphery at the cylinder cap, and roof 1 and bottom plate 2 are connected respectively to the both ends of every bolt hole lug 4. An air channel 3 is arranged between the top plate 1 and the bottom plate 2. The valve guide lug 5 is arranged in the middle of the top plate 1 and is positioned above the air channel 3. Water channels are arranged between the top plate 1 and the outer wall 6 of the air channel and between the bottom plate 2 and the outer wall 6 of the air channel, one end of the outer wall 6 of the air channel is connected with the valve guide lug 5, and the other end of the outer wall of the air channel is arranged along the direction of water flow in the water channel and extends to the bolt hole lug 4 which is connected with the valve guide lug 5 and is closest to the bolt hole lug. The bolt hole lug 4 far away from the air channel 3 is connected with the valve guide lug 5 through a reinforcing rib 7.
when the cylinder cover with the enhanced rigidity is used, the bolt hole lug 4 and the valve guide lug 5 are respectively connected through the reinforcing rib 7 and the air channel outer wall 6. The bolt hole lug 4 of the cylinder cover and the peripheral area thereof are compressed by the bolt, and the displacement is extremely small under the detonation pressure. After the valve guide lug 5 is connected with the bolt hole lug 4, the rigidity is enhanced, the displacement of the valve guide lug 5 is obviously reduced, and a hollow supporting column is formed outside an air passage connected with the cylinder cover bottom plate 2 below the valve guide lug 5, so that the displacement (or called as cylinder head lifting amount) of the cylinder cover bottom plate 2 is also obviously reduced, the whole rigidity of the cylinder cover is enhanced by the structure, the fire surface of the cylinder cover bottom plate 2 and the deformation displacement of the valve guide lug 5 are greatly reduced, the sealing performance of a gas sealing part is enhanced, the motion and normal matching of a valve mechanism are ensured, and the risk of abnormal abrasion of a cylinder cushion and the valve mechanism is reduced. The outer wall 6 of the air passage is arranged along the direction of water flow in the water passage, so that the structure of the cylinder cover is more compact.
further, the top plate 1 and the bottom plate 2 are integrally formed, the valve guide pipe lug 5 is provided with a valve guide pipe 8, and the lower part of the valve guide pipe 8 extends into the air passage 3. The valve 9 is mounted in a valve guide 8.
Furthermore, four valve guide lugs 5 are respectively a first valve guide lug 51, a second valve guide lug 52, a third valve guide lug 53 and a fourth valve guide lug 54, and every two valve guide lugs 5 are symmetrically arranged relative to the center of the top plate 1, so that the purpose of uniform stress is achieved, and the top plate 1 is prevented from being easily deformed. In the present embodiment, the first valve guide lug 51 and the fourth valve guide lug 54 are symmetrically arranged with respect to the center of the top plate 1, and the second valve guide lug 52 and the third valve guide lug 53 are symmetrically arranged with respect to the center of the top plate 1. The valve guide lugs 5 are the same as the number of the air passages 3.
Furthermore, the number of the bolt hole lugs 4 is six, the bolt hole lugs are respectively a first bolt hole lug 41, a second bolt hole lug 42, a third bolt hole lug 43, a fourth bolt hole lug 44, a fifth bolt hole lug 45 and a sixth bolt hole lug 46, and every two bolt hole lugs 4 are symmetrically arranged relative to the center of the cylinder cover, so that the purpose of uniform stress is achieved, and the top plate 1 and the bottom plate 2 are prevented from being easily deformed. In the present embodiment, the first bolt hole strap 41 and the sixth bolt hole strap 46 are symmetrically arranged with respect to the center of the cylinder head, the second bolt hole strap 42 and the fifth bolt hole strap 45 are symmetrically arranged with respect to the center of the cylinder head, and the third bolt hole strap 43 and the fourth bolt hole strap 44 are symmetrically arranged with respect to the center of the cylinder head.
Further, in the present embodiment, there are four outer duct walls 6, namely, the first outer duct wall 61, the second outer duct wall 62, the third outer duct wall 63, and the fourth outer duct wall 64, and there are two reinforcing ribs 7, namely, the first reinforcing rib 71 and the second reinforcing rib 72. Four air flue outer walls 6 are respectively connected with four bolt hole lugs 4 and an air valve guide pipe lug 5, and two reinforcing ribs 7 are respectively connected with two bolt hole lugs 4 and an air valve guide pipe lug 5 which are far away from the air flue 3. The method specifically comprises the following steps: the first bolt hole strap 41 is connected to the first valve guide strap 51 through the second duct outer wall 62. The second bolt hole lug 42 is connected to the second valve guide lug 52 by a first reinforcing rib 71. The third bolt hole lug 43 is connected to the second valve guide lug 52 by a fourth port outer wall 64. The fourth bolt hole lug 44 is connected to the third valve guide lug 53 through the first duct outer wall 61. The fifth bolt hole lug 45 is connected to the third valve guide lug 53 by a second reinforcing rib 72. The sixth bolt hole lug 46 is connected to the fourth valve guide lug 54 by a third duct outer wall 63.
Although the invention has been described in detail above with reference to specific embodiments, it will be apparent to one skilled in the art that modifications or improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. A cylinder cover with enhanced rigidity is characterized by comprising a top plate, a bottom plate, more than two bolt hole lugs and a valve guide pipe lug, the top plate is arranged above the bottom plate, the bolt hole lugs are uniformly arranged on the periphery of the cylinder cover, and both ends of each bolt hole lug are respectively connected with the top plate and the bottom plate, an air passage is arranged between the top plate and the bottom plate, the valve guide lug is arranged in the middle of the top plate and is positioned above the air passage, water passages are arranged between the top plate and the outer wall of the air passage and between the bottom plate and the outer wall of the air passage, one end of the outer wall of the air passage is connected with the valve guide lug, the other end of the outer wall of the air passage is arranged along the direction of water flow in the water passage and extends to be connected with the bolt hole lug nearest to the valve guide lug, and the bolt hole lug far away from the air passage is connected with the valve guide lug through a reinforcing rib.
2. The cylinder head of claim 1, wherein the top plate and the bottom plate are integrally formed, and a valve guide is provided on the valve guide tab, and a lower portion of the valve guide extends into the air passage.
3. The increased rigidity cylinder head according to claim 1, wherein the valve guide tabs are four, and each two valve guide tabs are arranged symmetrically with respect to a center of the head plate.
4. The enhanced rigidity cylinder head according to claim 1, wherein the bolt hole lugs are six, and each two bolt hole lugs are arranged symmetrically with respect to a center of the cylinder head.
5. The cylinder head according to claim 4, wherein the number of the outer walls of the air passages is four, the number of the reinforcing ribs is two, the four outer walls of the air passages are respectively connected to the four bolt hole lugs and the valve guide lug, and the two reinforcing ribs are respectively connected to the two bolt hole lugs and the valve guide lug away from the air passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910883264.9A CN110566360B (en) | 2019-09-18 | 2019-09-18 | Rigidity-enhanced cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910883264.9A CN110566360B (en) | 2019-09-18 | 2019-09-18 | Rigidity-enhanced cylinder head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110566360A true CN110566360A (en) | 2019-12-13 |
| CN110566360B CN110566360B (en) | 2024-06-18 |
Family
ID=68780985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910883264.9A Active CN110566360B (en) | 2019-09-18 | 2019-09-18 | Rigidity-enhanced cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110566360B (en) |
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-
2019
- 2019-09-18 CN CN201910883264.9A patent/CN110566360B/en active Active
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| CN110566360B (en) | 2024-06-18 |
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