阅读说明：本技术 一种发动机及其缸体水套 (Engine and cylinder body water jacket thereof ) 是由 黄家贵 何道明 潘永亮 姚克甫 赵明祥 马百坦 李华东 于 2020-05-21 设计创作，主要内容包括：本发明提供了一种发动机及其缸体水套,包括用于设置在发动机缸体内的水套本体,水套本体包括与发动机缸体的缸孔对应设置的第一水套,相邻的两个第一水套之间通过第二水套相连接,第一水套的底部为半径为R的第一圆弧,第一圆弧的顶点位于缸孔的中心轴线上,第一圆弧的顶点与第一水套的顶面之间的间距为H,位于缸孔内的活塞的运动行程为L,其中H＝0.9L－1.1L；水套本体的底部为波浪形,相邻的两个第一水套之间通过第二水套相连接,第二水套的底部为半径为r的第二圆弧,相邻的两个第一圆弧之间通过第二圆弧圆滑过渡并形成底部呈波浪形的水套本体。采用本发明技术方案,该缸体水套提高发动机的散热效率,降低了冷却的水泵功率需求,提升了发动机的有效功率。(The invention provides an engine and a cylinder water jacket thereof, which comprise a water jacket body arranged in an engine cylinder, wherein the water jacket body comprises first water jackets arranged corresponding to a cylinder hole of the engine cylinder, two adjacent first water jackets are connected through a second water jacket, the bottom of each first water jacket is a first circular arc with the radius of R, the vertex of each first circular arc is positioned on the central axis of the cylinder hole, the distance between the vertex of each first circular arc and the top surface of each first water jacket is H, and the motion stroke of a piston positioned in the cylinder hole is L, wherein H is 0.9L-1.1L; the bottom of the water jacket body is wavy, two adjacent first water jackets are connected through the second water jacket, the bottom of the second water jacket is a second circular arc with the radius of r, and the two adjacent first circular arcs are in smooth transition through the second circular arc to form the water jacket body with the wavy bottom. By adopting the technical scheme of the invention, the cylinder water jacket improves the heat dissipation efficiency of the engine, reduces the power requirement of a cooling water pump and improves the effective power of the engine.)

1. A cylinder body water jacket is characterized in that: the water jacket body is arranged in an engine cylinder body and comprises first water jackets arranged corresponding to cylinder holes of the engine cylinder body, two adjacent first water jackets are connected through a second water jacket, the bottom of each first water jacket is a first circular arc with the radius of R, the vertex of each first circular arc is positioned on the central axis of each cylinder hole, the distance between the vertex of each first circular arc and the top surface of each first water jacket is H, and the motion stroke of a piston positioned in each cylinder hole is L, wherein H is 0.9L-1.1L;

the bottom of the water jacket body is wavy, two adjacent first water jackets are connected through a second water jacket, the bottom of the second water jacket is a second arc with the radius of r, and the two adjacent first arcs are in smooth transition through the second arc to form the water jacket body with the wavy bottom.

2. The block water jacket according to claim 1, characterized in that: the diameter of the cylinder bore is D, where R is 0.6D-0.7D.

3. The block water jacket according to claim 1, characterized in that: the size relation of the first circular arc and the second circular arc is that R is 0.5R.

4. The block water jacket according to claim 1, characterized in that: the water jacket body is provided with at least two process holes which are matched with the engine cylinder body positioning device.

5. The block water jacket according to claim 4, wherein: each process hole is arranged on the side wall of the first water jacket, and the process holes are arranged in the middle of the first water jacket.

6. The block water jacket according to claim 1, characterized in that: the first water jacket and the second water jacket are integrally formed.

7. An engine, characterized in that: a cylinder block water jacket comprising a cylinder block water jacket as claimed in any one of claims 1 to 6.

8. The engine of claim 7, wherein: the water jacket body is arranged in the engine cylinder body, a cylinder cover is arranged on the top side of the engine cylinder body, and the cylinder cover is connected with the engine cylinder body through bolts.

9. The engine of claim 8, wherein: the engine cylinder body is provided with bolt holes corresponding to the bolts, the depth of each bolt hole is h1, the distance between the vertex of the second circular arc and the cylinder cover surface is h, and h is (0.95-1) x h 1.

Technical Field

The invention relates to the technical field of automobile engines, in particular to an engine and a cylinder water jacket thereof.

Background

The cylinder block water jacket of the engine exists in a space area between the cylinder hole and the outer wall of the cylinder block, and the cylinder block water jacket mainly plays a role of providing a cooling water channel for cooling a piston of the engine, preventing the piston from being damaged due to overheating, and cooling the cylinder hole in the running process of the engine. The cooling system of engine is used for taking away the redundant heat generated during combustion in the cylinder, preventing the high-temperature failure caused by heat accumulation of parts in contact with the combustion system, and the cylinder body water jacket is mainly arranged around the cylinder hole to cool the heat transferred from the cylinder hole.

Among the current cylinder body water jacket, 1) cylinder body water jacket adopts flat bottom scheme, and the bottom of cylinder body water jacket is the flat bottom promptly, and this technical scheme's is not enough: the bottom of the cylinder body is flat, a cooling liquid flow field mainly takes the transverse direction as the main part, the flow distribution is not uniform in the direction of the cylinder cover, the contact area of the cooling liquid and the cylinder hole is small, and the heat emitted by an engine cannot be taken away quickly; 2) adopt W type water jacket, this technical scheme's shortcoming: the W-shaped water jacket has poor heat dissipation performance, and meanwhile, the water jacket does not fully consider the heat transfer effect of the cylinder water jacket piston ring, so that the water jacket cannot meet the heat dissipation requirement of the engine cylinder.

Disclosure of Invention

The invention aims to provide a cylinder water jacket which improves the heat dissipation efficiency of an engine, reduces the power requirement of a cooling water pump and improves the effective power of the engine.

Based on the above, the invention provides a cylinder water jacket, which comprises a water jacket body arranged in an engine cylinder, wherein the water jacket body comprises first water jackets arranged corresponding to a cylinder hole of the engine cylinder, two adjacent first water jackets are connected through a second water jacket, the bottom of each first water jacket is a first circular arc with the radius of R, the vertex of each first circular arc is positioned on the central axis of the cylinder hole, the distance between the vertex of each first circular arc and the top surface of each first water jacket is H, and the motion stroke of a piston positioned in the cylinder hole is L, wherein H is 0.9L-1.1L;

the bottom of the water jacket body is wavy, two adjacent first water jackets are connected through a second water jacket, the bottom of the second water jacket is a second arc with the radius of r, and the two adjacent first arcs are in smooth transition through the second arc to form the water jacket body with the wavy bottom.

Preferably, the diameter of the cylinder hole is D, wherein R is 0.6D to 0.7D.

Preferably, the dimensional relationship between the first circular arc and the second circular arc is R equal to 0.5R.

Preferably, the water jacket body is provided with at least two process holes for positioning equipment with the engine cylinder block.

Preferably, each process hole is arranged on the side wall of the first water jacket, and the process hole is positioned in the middle of the first water jacket.

Preferably, the first water jacket and the second water jacket are integrally formed.

In order to achieve the same object, the invention also provides an engine comprising the cylinder water jacket.

Preferably, the water jacket body is arranged in the engine cylinder body, a cylinder cover is arranged on the top side of the engine cylinder body, and the cylinder cover is connected with the engine cylinder body through a bolt.

Preferably, the engine block is provided with bolt holes corresponding to the bolts, the bolt holes have a depth of h1, and the distance between the vertex of the second arc and the cylinder head surface is h, where h is (0.95-1) × 1.

The embodiment of the invention has the following beneficial effects:

the cooling of the cylinder water jacket of the engine mainly needs to consider two main key points: one is the heat transfer of the cylinder hole, the other is the heat transferred to the cylinder hole by the piston ring, and the two key points are related to the motion stroke L of the piston rod, and the value H of the first water jacket is the depth value of the cylinder water jacket, wherein H is 0.9L-1.1L, so that the piston stroke L is close to the depth value of the cylinder water jacket, and the heat in the inner wall of the cylinder hole can be transferred to the water jacket when the piston is at any position and the high-temperature gas in the cylinder hole and the piston ring transfer the heat to the inner wall of the cylinder hole, so that the cylinder water jacket has good heat dissipation capacity; the wavy water jacket body can lead the cooling liquid to have longer flowing contact time with the cylinder hole, increase the contact area between the water jacket body and the cooling liquid, and can promote the flow velocity of the cooling liquid passing between the two cylinders, thus being more beneficial to heat conduction and further promoting the cooling effect, and in combination with the arrangement of the cooling water channel of the cylinder cover, the cooling water channel is arranged between the outer wall of the cylinder body and the cylinder water jacket, the cylinder water jacket adopting the scheme leads the distribution of the cooling flow field to be more reasonable, and simultaneously, the wavy water jacket body is adopted, the flow field of the cooling liquid can be optimized, the flowing speed of the fluid between the two cylinders is increased, furthermore, the wavy structure of the water jacket body leads the cooling liquid to have an upward component force when flowing, thereby increasing the rolling effect of the cooling liquid to the cylinder cover, leading the cooling liquid to uniformly distribute and cool the cylinder cover of the cylinder body, reducing the temperature difference effect, through setting up foretell cylinder body water jacket that has good cooling effect, can reduce refrigerated water pump power demand, promote the effective power of engine.

Drawings

Fig. 1 is a schematic structural view of a water jacket body in an embodiment of the invention.

FIG. 2 is a top view of an engine block provided with a block water jacket in an embodiment of the present invention.

Fig. 3 is a cross-sectional view taken at a-a in fig. 2.

In the figure: 1. a water jacket body; 11. a first water jacket; 12. a second water jacket; 13. a fabrication hole; 2. an engine block; 21. bolt holes; 3. the cylinder cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

As shown in fig. 1 to 3, the present embodiment provides a cylinder water jacket, which includes a water jacket body 1 for being disposed in an engine cylinder 2, the water jacket body 1 includes first water jackets 11 disposed corresponding to cylinder bores of the engine cylinder 2, two adjacent first water jackets 11 are connected by a second water jacket 12, bottoms of the first water jackets 11 are first arcs having a radius R, vertexes of the first arcs are located on a central axis of the cylinder bores, a distance between the vertexes of the first arcs and a top surface of the first water jackets 11 is H, a moving stroke of a piston located in the cylinder bore is L, where H is 0.9L to 1.1L, it is noted that, in the present embodiment, piston rings are sleeved on outer walls of the piston, so that abrasion caused by the piston during movement can be avoided, heat during the piston movement is mainly transferred by the piston rings, and a part of heat in the cylinder bores is directly transferred from the cylinder walls by heat in high-temperature gas generated during combustion in the cylinder bores The heat that another part needs the transmission then comes from the piston, because the power source that the engine produced mainly leans on the high temperature high-pressure gas direct action piston that produces after the gaseous outbreak burning of cylinder hole internal mixing, the piston is direct to be contacted with the high temperature high-pressure gas after the burning, high temperature high pressure gas after the burning then directly transmits a large amount of heat to the piston top, for preventing that the heat from piling up at the piston top and causing piston hot melt inefficacy, then the heat at piston top need directly transmit the cylinder hole inner wall through the piston ring on, through the heat-conduction of piston ring, the heat load factor of safety of piston has been guaranteed, to sum up, two main key points need be considered in the cooling of the cylinder: one is the heat transfer of the cylinder hole, the other is the heat transferred to the cylinder hole by the piston ring, and the two key points are related to the motion stroke L of the piston rod, and the above-mentioned value H of the first water jacket 11 is the depth value of the cylinder water jacket, where H is 0.9L-1.1L, so that the piston stroke L is close to the depth value of the cylinder water jacket, which can ensure that when the piston is at any position, the high-temperature gas in the cylinder hole and the heat transferred by the piston ring to the inner wall of the cylinder hole can be transferred to the cylinder water jacket, so that the cylinder water jacket has good heat dissipation capacity, and it should be noted that the cylinder water jacket referred to in this embodiment is the water jacket body;

the bottom of the water jacket body 1 is wave-shaped, two adjacent first water jackets 11 are connected through the second water jacket 12, the bottom of the second water jacket 12 is a second circular arc with the radius r, the two adjacent first circular arcs are in smooth transition through the second circular arc to form the water jacket body 1 with the wave-shaped bottom, the smooth transition structure enables the structure of the water jacket body 1 to be more reasonable, the wave-shaped water jacket body 1 can enable cooling liquid to have longer flowing contact time with a cylinder hole and is more beneficial to heat conduction, so that the cooling effect is improved, the cooling water channel arrangement of the cylinder cover 3 is combined, the cooling water channel is arranged between the outer wall of the cylinder body and the cylinder body water jacket, the cylinder body water jacket adopting the flow field scheme enables the cooling distribution to be more reasonable, and meanwhile, the wave-shaped water jacket body 1 is adopted, the cooling liquid flow field can be optimized, the flowing speed of fluid between two cylinders is increased, and further, the wave structure of the water jacket body 1 enables the cooling liquid to have an upward component force when flowing, so that the rolling effect of the cooling liquid to the cylinder cover 3 is increased, the cooling liquid uniformly cools the cylinder body and the cylinder cover 3, the temperature difference effect is reduced, and the cooling effect is improved.

Based on the technical scheme, two main key points are mainly considered for cooling the cylinder body water jacket of the engine: one is the heat transfer of the cylinder hole, the other is the heat transferred to the cylinder hole by the piston ring, and the two key points are related to the motion stroke L of the piston rod, and the value H of the first water jacket 11 is the depth value of the cylinder water jacket, wherein H is 0.9L-1.1L, so that the piston stroke L is close to the depth value of the cylinder water jacket, and the heat in the inner wall of the cylinder hole can be transferred to the water jacket when the piston is at any position and the high-temperature gas in the cylinder hole and the piston ring transfer the heat to the inner wall of the cylinder hole, so that the cylinder water jacket has good heat dissipation capacity; by adopting the wavy water jacket body 1, the cooling liquid can have longer flowing contact time with the cylinder hole, the contact area between the water jacket body 1 and the cooling liquid is increased, the flow velocity of the cooling liquid passing between the two cylinders can be improved, the heat conduction is more facilitated, and the cooling effect is improved, and by combining the arrangement of the cooling water channel of the cylinder cover 3, the cooling water channel is arranged between the outer wall of the cylinder body and the cylinder body water jacket, the distribution of the cooling flow field is more reasonable by adopting the cylinder body water jacket of the scheme, meanwhile, the flow field of the cooling liquid can be optimized by adopting the wavy water jacket body 1, the flowing speed of the fluid between the two cylinders is increased, furthermore, the wavy structure of the water jacket body 1 enables the cooling liquid to have an upward component force when flowing, so that the rolling effect of the cooling liquid to the cylinder cover 3 is increased, and the cooling liquid uniformly cools the cylinder body and the cylinder, reduce the difference in temperature effect and promote the cooling effect, through setting up foretell cylinder body water jacket that has good cooling effect, can reduce refrigerated water pump power demand, promote the effective power of engine.

In the present embodiment, the diameter of the cylinder hole is D, where R is 0.6D-0.7D, so that the water jacket body 1 is structurally reasonable, that is, the first circular arc of the first water jacket 11 is slightly larger than the radius of the cylinder hole, so as to meet the setting requirement, and at the same time, the first circular arc of the first water jacket 11 cannot be too large, and too large causes the flow speed of the coolant to be too small, which affects the cooling effect of the coolant. Further, the size relationship between the first arc and the second arc is R equal to 0.5R, and the bottom of the first water jacket 11 and the bottom of the second water jacket 12 are in smooth transition, so that the bottom of the water jacket body 1 is more reasonable in wave shape due to the adoption of the smooth transition structure, and unstable flowing of the coolant caused by an excessively large fall arranged at the bottom of the water jacket body 1 is avoided.

The water jacket body 1 is provided with at least two process holes 13 which are positioned and equipped with the engine cylinder body 2, and the water jacket body 1 and the engine cylinder body 2 can be positioned and connected by arranging the process holes 13, so that the water jacket body 1 can be conveniently disassembled and assembled, and the installation position of the water jacket body 1 is more accurate. Further, each of the fabrication holes 13 is disposed on the side wall of the first water jacket 11, and the fabrication hole 13 is located in the middle of the first water jacket 11, so that the structural strength of the first water jacket 11 can be improved, and the structural strength of the cylinder water jacket is prevented from being affected by the fabrication hole 13.

Preferably, the first water jacket 11 and the second water jacket 12 are integrally formed, and the water jacket body 1 is of an integral structure, so that the requirement of structural strength is met, and the processing and production are more convenient.

In order to achieve the same purpose, the embodiment further provides an engine, which comprises the cylinder water jacket as described above, and by providing the cylinder water jacket with good cooling effect as described above, the power requirement of a cooling water pump can be reduced, and the effective power of the engine can be increased.

Wherein, water jacket body 1 set up in the engine cylinder body 2, just the top side of engine cylinder body 2 is provided with cylinder cap 3, cylinder cap 3 through the bolt with engine cylinder body 2 is connected, adopts bolt structure to make the dismouting between engine cylinder body 2 and the cylinder cap 3 more convenient, and joint strength satisfies the demand, guarantees that the structure of engine cylinder body 2 sets up more rationally.

In addition, the engine block 2 is provided with bolt holes 21 corresponding to the bolts, the depth of the bolt holes 21 is h1, the distance between the vertex of the second arc and the surface of the cylinder head 3 is h, wherein h is (0.95-1) × h1, the adoption of the structure can effectively increase the structural strength of the bolts of the cylinder head 3, reduce the deformation amount of the cylinder hole, reduce the engine oil consumption and improve the heat efficiency of the engine, specifically, as shown in fig. 3, the vertex in the water jacket body 1 is lower than or equal to the bottom of the bolt holes 21, so that the force borne by the bolt holes 21 is close to parallel as shown in the figure, the resultant force F between the two is close to horizontal, the damage to the outer wall at the periphery of the bolt holes 21 when the engine block 2 flows the cooling liquid is avoided, the structural strength of the engine block 2 is enhanced, and the deformation amount of the cylinder hole is reduced, the structure of the engine block 2 is more stable.

By adopting the engine and the cylinder water jacket thereof provided by the embodiment of the invention, the cylinder water jacket of the engine is mainly cooled by considering two main key points: one is the heat transfer of the cylinder hole, the other is the heat transferred to the cylinder hole by the piston ring, and the two key points are related to the motion stroke L of the piston rod, and the value H of the first water jacket 11 is the depth value of the cylinder water jacket, wherein H is 0.9L-1.1L, so that the piston stroke L is close to the depth value of the cylinder water jacket, and the heat in the inner wall of the cylinder hole can be transferred to the water jacket when the piston is at any position and the high-temperature gas in the cylinder hole and the piston ring transfer the heat to the inner wall of the cylinder hole, so that the cylinder water jacket has good heat dissipation capacity; by adopting the wavy water jacket body 1, the cooling liquid can have longer flowing contact time with the cylinder hole, the contact area between the water jacket body 1 and the cooling liquid is increased, the flow velocity of the cooling liquid passing between the two cylinders can be improved, the heat conduction is more facilitated, and the cooling effect is improved, and by combining the arrangement of the cooling water channel of the cylinder cover 3, the cooling water channel is arranged between the outer wall of the cylinder body and the cylinder body water jacket, the distribution of the cooling flow field is more reasonable by adopting the cylinder body water jacket of the scheme, meanwhile, the flow field of the cooling liquid can be optimized by adopting the wavy water jacket body 1, the flowing speed of the fluid between the two cylinders is increased, furthermore, the wavy structure of the water jacket body 1 enables the cooling liquid to have an upward component force when flowing, so that the rolling effect of the cooling liquid to the cylinder cover 3 is increased, and the cooling liquid uniformly cools the cylinder body and the cylinder, reduce the difference in temperature effect and promote the cooling effect, through setting up foretell cylinder body water jacket that has good cooling effect, can reduce refrigerated water pump power demand, promote the effective power of engine.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.