CN212079471U - Forced cooling double-layer water channel integral cylinder cover - Google Patents

Abstract

The utility model discloses a double-deck water course whole cylinder head of forced cooling, the bottom surface of cylinder head is the fire face, be provided with lower floor's water course and upper water course in the cylinder head from bottom to supreme interval, the upper water course is provided with the apopore, lower floor's water course with upper water course passes through the upper water hole intercommunication, just go up the water hole set up in the side of admitting air of cylinder head, the bottom surface of lower floor's water course be provided with a plurality of lieing in the exhaust side of cylinder head and along the main inlet opening of controlling direction evenly distributed, and all the aperture of main inlet opening reduces gradually from the middle toward controlling the direction. Adopt the utility model discloses a be provided with upper water course and lower floor's water course in the cylinder head, can strengthen the cooling effect to the cylinder head, the aperture of all main inlet openings reduces gradually toward left right direction from the centre to the flow of cooling water keeps unanimous basically in making every combustion chamber, improves the refrigerated equilibrium of cylinder head, thereby improves the life of cylinder head.

Description

Forced cooling double-layer water channel integral cylinder cover

Technical Field

The utility model relates to the technical field of engines, in particular to whole cylinder head of double-deck water course of forced cooling.

Background

At present, the development of diesel engine technology can not change the fuel oil system. The fuel is pushed out from a mechanical fuel pump to an electric control unit pump and then to the existing national six-high pressure common rail pump. With the continuous improvement of power and emission level, diesel engine manufacturers at home and abroad improve the power and emission level of the diesel engine through various technical means, such as the improvement of supercharging pressure, oil injection pressure, advance angle optimization and the like. These improvements lead to an increase in the indexes of diesel engine explosion pressure, power per liter, etc., and the mechanical and thermal loads on engine parts are greatly increased. With the mature application of the multi-valve technology and the electric control high-pressure common rail technology of the diesel engine, the power per liter and the average effective pressure of the engine reach an extremely high level, so that the heat load of the engine is increased.

In the technical field of water-cooled multi-cylinder diesel engines, a cylinder cover is one of extremely important parts, and the bottom surface of the cylinder cover is directly influenced by combustion and explosion pressure and is influenced by heat loads of an air inlet and exhaust channel, so that the cylinder cover bears serious thermal shock loads, and the design structure of the cylinder cover is complicated due to the fact that parts such as an oil injector, an air distribution mechanism system and the like are installed on the cylinder cover. Therefore, the water channel design is particularly important for improving the cooling strength and ensuring the cooling balance of each cylinder, and plays an important role in the reliability of the diesel engine and the heat balance of the whole engine.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double-deck water course whole cylinder head of forced cooling to overcome the poor shortcoming of cooling equilibrium of current cylinder head.

In order to achieve the purpose, the utility model provides a forced cooling double-layer water channel integral cylinder cover, the cylinder cover comprises a plurality of combustion chambers which are uniformly distributed along the left-right direction, the center of each combustion chamber is provided with an oil injector mounting hole, four valve seats which are uniformly distributed along the circumferential direction are arranged around the oil injector mounting hole, the bottom surface of the cylinder cover is a fire surface, a lower water channel and an upper water channel are arranged in the cylinder cover at intervals from bottom to top, the upper water channel is provided with a water outlet hole, the lower water channel is communicated with the upper water channel through the water outlet hole, the upper water holes are formed in the air inlet side of the cylinder cover, the bottom surface of the lower-layer water channel is provided with a plurality of main water inlet holes which are located on the air exhaust side of the cylinder cover and are uniformly distributed along the left-right direction, and the aperture of each main water inlet hole is gradually reduced from the middle to the left-right direction.

Preferably, in the above technical solution, the main water inlets and the combustion chamber are distributed in a one-to-one correspondence, a nose bridge branch is disposed in a region of the lower water passage close to the injector mounting hole, a first branch and a second branch are disposed in regions close to the two valve seats located on the exhaust side, and cooling water flowing from the main water inlet flows into the upper water hole after separately flowing through the first branch, the second branch and the nose bridge branch.

Preferably, among the above-mentioned technical scheme, it includes that the water hole is gone up to a plurality of owner and two inferior water holes, adjacent two be provided with one between the combustion chamber the owner goes up the water hole, and is located leftmost the left side of combustion chamber is provided with one inferior water hole, is located rightmost the right side of combustion chamber is provided with one inferior water hole.

Preferably, among the above-mentioned technical scheme, the bottom surface of lower floor's water course is provided with a plurality of and is located admit air the side and along the inferior inlet opening of left and right directions evenly distributed, just inferior inlet opening with main inlet opening one-to-one distributes, is being close to and is being located admit air two of side the region of valve seat is provided with third branch road and fourth branch road, follow the cooling water division flow that inferior inlet opening flowed in flows through third branch road with flow into behind the fourth branch road the water feeding hole.

Preferably, in the above technical solution, the aperture of the main water inlet is larger than the aperture of the secondary water inlet.

Preferably, in the above technical solution, the aperture of the main upper water hole is larger than the aperture of the secondary upper water hole.

Preferably, in the above technical scheme, an annular water cavity located in the upper water channel is formed around each fuel injector mounting hole, and cooling water flowing out of the upper water hole flows through the annular water cavity and then flows out of the water outlet hole.

Preferably, in the above technical solution, the exhaust passage and the intake passage of the cylinder head are both sandwiched between the upper water passage and the lower water passage, and the upper water passage is inclined inward and downward from the outer side of the exhaust passage.

Preferably, in the above technical scheme, each of the main water inlet holes is distributed in a waist shape with a concave surface facing inwards.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a be provided with upper water course and lower floor's water course in the cylinder head, in order to strengthen the cooling effect to the cylinder head, and be provided with the exhaust side that a plurality of is located the cylinder head and follow the main inlet opening of left right direction evenly distributed in the bottom surface of lower floor's water course, the aperture of all main inlet openings reduces gradually from the middle toward left right direction, the aperture that is located the main inlet opening in the middle of the cylinder head promptly is the biggest, it is then smaller toward both sides more, so that the flow of cooling water keeps unanimous basically in every combustion chamber, improve the refrigerated equilibrium of cylinder head, thereby improve the life of cylinder head.

2. The utility model discloses a lower floor's water course still is provided with the inferior inlet opening that is located the side of admitting air, and inferior inlet opening acts together with main inlet opening, cools off the intake duct and the exhaust passage of cylinder head respectively to improve the cooling effect of cylinder head.

3. The utility model discloses an upper water course is provided with the annular water cavity that encircles the sprayer mounting hole, improves the cooling effect to the sprayer.

4. The utility model discloses an intake duct and the exhaust passage clamp of cylinder head establish between upper water course and lower floor's water course, and the upper water course inwards inclines downwards by the outside of exhaust passage to increase the area of contact of upper water course and exhaust passage, improve the cooling effect, prevent that the local overheat phenomenon from appearing in the cylinder head.

Drawings

Fig. 1 is a schematic view of the main structure of the forced cooling double-layer water channel integral cylinder cover according to the present invention.

Fig. 2 is a schematic bottom view of fig. 1 according to the present invention.

Fig. 3 is a schematic sectional view taken along line a-a of fig. 1 according to the present invention.

Fig. 4 is a schematic cross-sectional view taken along line B-B of fig. 1 according to the present invention.

Fig. 5 is a schematic cross-sectional view taken along line C-C of fig. 1 according to the present invention.

Description of the main reference numerals:

1-oil injector mounting hole, 2-valve seat, 3-main water inlet hole, 4-secondary water inlet hole, 5-lower water channel, 6-exhaust channel, 7-upper water channel, 8-main upper water hole, 9-secondary upper water hole, 10-first branch, 11-second branch, 12-nose bridge branch, 13-third branch, 14-fourth branch, 15-water outlet hole, 16-annular water cavity and 17-air inlet channel.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Fig. 1 to 5 show according to the utility model discloses preferred embodiment's a structural schematic diagram of the whole cylinder head of double-deck water course of forced cooling, the cylinder head includes four combustion chambers along left right direction evenly distributed, and the center of every combustion chamber is provided with sprayer mounting hole 1, and is provided with four valve seats 2 along circumference evenly distributed around sprayer mounting hole 1. Referring to fig. 1 to 5, the bottom surface of the cylinder head is a fire surface, and a lower water channel 5 and an upper water channel 7 are arranged in the cylinder head at intervals from bottom to top, wherein the upper water channel 7 is sequentially communicated with each combustion chamber, and the lower water channel is also sequentially communicated with each combustion chamber, so as to enhance the cooling effect on the cylinder head; upper water course 7 is provided with apopore 15, lower floor's water course 5 and upper water course 7 are through the upper water hole intercommunication, and the upper water hole sets up in the side of admitting air of cylinder head, the bottom surface of lower floor's water course 5 is provided with the exhaust side that a plurality of is located the cylinder head and follows left right direction evenly distributed's main inlet opening 3, the aperture of all main inlet openings 3 reduces gradually from the centre toward left right direction, the aperture that is located main inlet opening 3 in the middle of the cylinder head is the biggest promptly, it is then smaller toward both sides more, so that the flow of the cooling water in every combustion chamber keeps unanimous basically, improve the refrigerated equilibrium of cylinder head, thereby improve the life of cylinder head.

Referring to fig. 2 to 4, preferably, the main water inlets 3 are distributed in one-to-one correspondence with the combustion chambers, and in each combustion chamber, the lower water passage 5 is provided with a nose bridge branch 12 in a region close to the injector mounting hole 1, and is provided with a first branch 10 and a second branch 11 in a region close to the two valve seats 2 located on the exhaust side, wherein the nose bridge branch 12 is distributed in a "y" shape with an opening facing the injector mounting hole 1, the first branch 10 and the second branch 11 are distributed in an arc shape with an opening facing the injector mounting hole 1 and located outside the valve seats 2, and the nose bridge branch 12 is located between the first branch 10 and the second branch 11, so that the cooling water flowing in from the main water inlet 3 is divided into three branches, and after flowing through the first branch 10, the second branch 11 and the nose bridge branch 12, enters the upper water passage 7 through the upper water hole. Further preferably, each main water inlet hole 3 is distributed in a waist shape with a concave surface facing inwards.

Referring to fig. 2 to 4, preferably, the water supply holes include a plurality of main water supply holes 8 and two sub water supply holes 9, one main water supply hole 8 is provided between the two combustion chambers, and the left side of the leftmost combustion chamber is provided with one sub water supply hole 9, the right side of the rightmost combustion chamber is provided with one sub water supply hole 9, and all the main water supply holes 8 and the sub water supply holes 9 are located on the same straight line. In each combustion chamber, cooling water flowing in from the corresponding main water inlet hole 3 is divided into three branches, the three branches are respectively a first branch, a second branch and a third branch, the first branch flows through the first branch 10, the second branch flows through the second branch 11, the third branch flows into the nose bridge branch 12 and then is divided equally and flows into the first branch 10 and the second branch 11 on two sides, and the third branch and the first branch 10 are converged into the main water inlet hole 3 or the secondary water inlet hole 4 close to the left side of the combustion chamber and the second branch 11 are converged into the main water inlet hole 3 or the secondary water inlet hole 4 close to the right side of the combustion chamber. It is further preferable that the diameter of the primary upper water hole 8 is larger than that of the secondary upper water hole 9.

Referring to fig. 2 to 4, preferably, the bottom surface of the lower waterway 5 is provided with a plurality of secondary water inlets 4 located at the air inlet side of the cylinder head and uniformly distributed along the left-right direction, the secondary water inlets 4 are distributed in one-to-one correspondence with the primary water inlets 3, a third branch 13 and a fourth branch 14 are arranged in the regions close to the two valve seats 2 located at the air inlet side, the third branch 13 and the fourth branch 14 are distributed in an arc shape with openings facing the injector mounting hole 1 and located outside the valve seats 2, the cooling water flowing in from the secondary water inlets 4 is divided into two branches, and the cooling water flows through the third branch 13 and the fourth branch 14 respectively and then enters the upper waterway 7 through the upper water holes. In each combustion chamber, the third branch flows through the third branch 13 and then merges into the main water inlet hole 3 or the secondary water inlet hole 4 close to the left side of the combustion chamber, and the fourth branch flows through the fourth branch 14 and then merges into the main water inlet hole 3 or the secondary water inlet hole 4 close to the right side of the combustion chamber. The secondary water inlet 4 and the primary water inlet 3 act together to respectively cool the air inlet passage 17 and the air outlet passage 6 of the cylinder head, so that the cooling effect of the cylinder head is improved. Further preferably, the diameter of the main water inlet hole 3 is larger than that of the secondary water inlet hole 4, so that cooling of the exhaust passage 6 of the cylinder cover is enhanced, the cooling effect of the cylinder cover is improved, and the local overheating phenomenon of the cylinder cover is prevented.

Referring to fig. 3 and 5, preferably, an annular water cavity 16 is formed around each injector mounting hole 1 and located in the upper water channel 7, so as to improve the cooling effect of the injector, and cooling water from the upper water hole flows through the annular water cavity 16 and then flows out from the water outlet hole 15, that is, in the upper water channel 7, cooling water from the main upper water hole 8 and the secondary upper water hole 9 flows in the left-right direction, and finally all flows into the water outlet hole 15 and flows out from the water outlet hole 15 after sequentially flowing through the corresponding annular water cavities 16.

Referring to fig. 3, preferably, the exhaust passage 6 and the intake passage 17 of the cylinder head are sandwiched between the upper water passage 7 and the lower water passage 5, and the upper water passage 7 is inclined inward and downward from the outer side of the intake passage 17 of the exhaust passage 6, so as to increase the contact area between the upper water passage 7 and the exhaust passage 6, improve the cooling effect, and prevent the cylinder head from local overheating.

By adopting the utility model, the upper water channel 7 and the lower water channel 5 are arranged in the cylinder cover to enhance the cooling effect on the cylinder cover, and the hole diameters of all the main water inlet holes 3 on the cylinder cover are gradually reduced towards the left and right directions, so that the flow of cooling water in each combustion chamber is basically kept consistent, the cooling balance of the cylinder cover is improved, and the service life of the cylinder cover is prolonged; and the upper water channel 7 inclines towards the exhaust passage 6, so that the contact area between the upper water channel 7 and the exhaust passage 6 is increased, the cooling effect is improved, and the cylinder cover is prevented from being locally overheated.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (9)

1. A forced cooling double-layer water channel integral cylinder cover comprises a plurality of combustion chambers which are uniformly distributed along the left-right direction, a fuel injector mounting hole is arranged at the center of each combustion chamber, four valve seats which are uniformly distributed along the circumferential direction are arranged around the fuel injector mounting hole, it is characterized in that the bottom surface of the cylinder cover is a fire surface, a lower water channel and an upper water channel are arranged in the cylinder cover at intervals from bottom to top, the upper layer water channel is provided with a water outlet hole, the lower layer water channel is communicated with the upper layer water channel through the water outlet hole, the upper water holes are formed in the air inlet side of the cylinder cover, the bottom surface of the lower-layer water channel is provided with a plurality of main water inlet holes which are located on the air exhaust side of the cylinder cover and are uniformly distributed along the left-right direction, and the aperture of each main water inlet hole is gradually reduced from the middle to the left-right direction.

2. A forced cooling double-deck water passage integral cylinder head as set forth in claim 1, wherein said main water inlet holes are distributed in one-to-one correspondence with said combustion chambers, said lower water passage is provided with a nose bridge branch at a region near said injector mounting hole, and a first branch and a second branch are provided at a region near said two valve seats at said exhaust side, and cooling water flowing from said main water inlet hole flows into said upper water hole after separately passing through said first branch, said second branch and said nose bridge branch.

3. The cylinder head with the double-layer water channel and the integral cylinder head with the double-layer water channel as claimed in claim 2, wherein the water supply holes comprise a plurality of main water supply holes and two secondary water supply holes, one main water supply hole is arranged between two adjacent combustion chambers, one secondary water supply hole is arranged on the left side of the combustion chamber on the leftmost side, and one secondary water supply hole is arranged on the right side of the combustion chamber on the rightmost side.

4. The cylinder head with the double-deck water channels as claimed in claim 3, wherein a plurality of secondary water inlets are provided on the bottom surface of the lower water channel, the secondary water inlets are located on the air inlet side and are uniformly distributed in the left-right direction, the secondary water inlets are distributed in one-to-one correspondence with the primary water inlets, a third branch and a fourth branch are provided in the regions close to the two valve seats located on the air inlet side, and the cooling water flowing from the secondary water inlets separately flows through the third branch and the fourth branch and then flows into the water inlet holes.

5. A forced cooling double-layer water channel integral cylinder cover as claimed in claim 4, characterized in that the aperture of the main water inlet is larger than that of the secondary water inlet.

6. A forced cooling double-deck water passage integrated cylinder head as set forth in claim 3, wherein said primary water supply hole has a larger diameter than said secondary water supply hole.

7. A forced cooling double-layer water channel integral cylinder cover as claimed in claim 1, wherein an annular water cavity is formed around each fuel injector mounting hole and located in the upper water channel, and cooling water flowing out of the upper water hole flows through the annular water cavity and then flows out of the water outlet hole.

8. A forced cooling double-deck water passage integrated cylinder head as set forth in claim 1, wherein both of the exhaust passage and the intake passage of the cylinder head are sandwiched between said upper water passage and said lower water passage, and said upper water passage is inclined inward and downward from the outer side of said exhaust passage.

9. A forced cooling double-deck water channel integral cylinder head as claimed in claim 1, wherein each of said main water inlet holes is distributed in a kidney shape with a concave surface facing inward.

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