Water-cooled engine cylinder block

Abstract

The utility model discloses a water-cooled engine cylinder block which comprises a cylinder block body, a plurality of double-layer heat dissipation fins are arranged on the side wall of the cylinder block body, the heat dissipation fins are arranged in parallel, a heat dissipation cavity is formed in each heat dissipation fin, and at least one water inlet pipe and at least one water outlet pipe are arranged on the heat dissipation fins in a penetrating mode. The side walls of the water inlet pipe and the water outlet pipe are provided with through holes communicating with the heat dissipation cavity, and the water inlet pipe and the water outlet pipe are each provided with a blocking end and an external pipeline end. The water inlet pipe and the water outlet pipe conduct water cooling in an upper-inlet lower-outlet mode or a lower-inlet upper-outlet mode. According to the engine cylinder block, the fins outside the engine cylinder block body are arranged to be of the double-layer structure, the heat dissipation cavities are formed in the fins, then the heat dissipation cavities are communicated through the pipelines, when an engine operates, the heat dissipation fins are cooled in a circulating water injection mode, heat generated by working of the engine is indirectly dissipated, it is guaranteed that the temperature of the engine is within the normal range, and the service life of the engine is prolonged. The structure has the advantages of high heat dissipation efficiency and low construction difficulty.

Description

Technical Field

[0001] The utility model relates to the field of engine components, in particular to a water-cooled engine cylinder body. Background Art

[0002] The cylinder block is the main body of the engine. It connects each cylinder and the crankcase into one, and is the supporting frame for installing the piston, crankshaft and other parts and accessories.

[0003] Since the cylinder body has reciprocating cylinders, rotating crankshafts, and combustion of oil and gas, a large amount of heat is released during operation. In order to ensure the normal operation of each component, heat dissipation and cooling are required during its operation. The patent with application number 201610476532.1 discloses a water-cooled motorcycle engine cylinder body structure, which is provided with a cylinder hole, a cooling water chamber and a chain chamber on the cylinder body; the cooling water chamber is located outside the two A bolt holes and the two B bolt holes. The inner wall of the cooling water chamber near the cylinder hole is connected smoothly from end to end by the first large arc, the first small arc, the second large arc, the second small arc, the third large arc, the third small arc and the fourth large arc, and the first large arc and the fourth large arc are disconnected by one of the A bolt holes. The first small arc, the second small arc and the third small arc are respectively wrapped around the two B bolt holes and the other A bolt hole and have the same center as the corresponding B bolt hole and A bolt hole. The present invention increases the heat dissipation area of ​​the cylinder body and improves the cooling efficiency; the engine structure is more compact, and the cylinder body and the cylinder head of the air cooler can be directly changed to a water cooler without changing other parts such as the crankcase.

[0004] The above patent opens a cooling channel on the cylinder body, and then cools the engine by the cooling water flowing through it. However, since it is necessary to open a channel inside the cylinder body for cooling, it will affect the structural strength of the cylinder body. In addition, opening a complex channel inside involves considerable manufacturing difficulty whether it is cast by setting a salt core or other methods. Utility Model Content

[0005] Based on the disadvantages of the prior art that a cooling channel is provided inside the cylinder body, which leads to a decrease in the structural strength of the cylinder body and an increase in the difficulty of manufacturing, the utility model provides a water-cooled engine cylinder body.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A water-cooled engine cylinder block comprises a cylinder body, a side wall of which is provided with a plurality of double-layer heat dissipation fins, the heat dissipation fins are arranged in parallel and have a heat dissipation cavity therein, at least one water inlet pipe and at least one water outlet pipe are passed through the heat dissipation fins, the side walls of the water inlet pipe and the water outlet pipe are provided with through holes connected to the heat dissipation cavity, and the water inlet pipe and the water outlet pipe both have a blocking end and an external pipe end.

[0008] Preferably, the penetration points of the water inlet pipe and the water outlet pipe on the heat dissipation fin are sealed by welding.

[0009] Preferably, the top and bottom surfaces of the heat dissipation fins are provided with an annular boss surrounding the water inlet pipe and the water outlet pipe, and the annular boss is connected to the water inlet pipe / water outlet pipe by welding.

[0010] Preferably, the inner side wall of the annular boss is in contact with the side wall of the water inlet pipe / water outlet pipe.

[0011] Preferably, the heat dissipation fin comprises an upper plate body and a lower plate body, the outer edges of the upper plate body and the lower plate body are bent toward each other and then extended horizontally to form abutment portions for welding, and the abutment portions are used to weld the outer edges of the upper plate body and the lower plate body.

[0012] Preferably, the inner edges of the upper plate and the lower plate are welded to the outer side wall of the cylinder body.

[0013] Preferably, the cylinder body comprises a top part and a bottom part, the side wall of the top part has a protrusion, the heat dissipation fins of the side wall of this part are of a single-layer structure, and the liquid inlet pipe and the liquid outlet pipe only pass through the heat dissipation fins of the single-layer structure.

[0014] Preferably, the side wall of the bottom part of the cylinder body is a circular structure, and the heat dissipation fins of a double-layer structure are arranged on the side wall of the bottom part of the cylinder body.

[0015] Preferably, after installation, the top side and the bottom side of the cylinder body have a spacing from the first heat dissipation fins on both sides, and the spacing is used for external pipes for the water inlet pipe and the water outlet pipe.

[0016] Preferably, two water inlet pipes and two water outlet pipes are provided, which are alternately penetrated at the four corners of the heat dissipation fins.

[0017] Compared with the prior art, the advantages of the utility model are as follows: the fins outside the engine cylinder body are arranged as a double-layer structure, a heat dissipation cavity is formed inside, and the heat dissipation cavities are connected by pipes. When the engine is running, the heat dissipation fins are cooled by circulating water injection, and the heat generated by the engine is indirectly dissipated to ensure that the engine temperature is within the normal range. The structure has high heat dissipation efficiency and has the advantage of low construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 for Figure 2 A perspective view of the present application;

[0020] Figure 3 A cross-sectional view of the present application;

[0021] Figure 4 It is a three-dimensional diagram of a double-layer heat sink;

[0022] Figure 5 This is an exploded view of a double-layer heat sink;

[0023] Figure 6 It is a cross-sectional view of a double-layer heat sink fin;

[0024] In the figure: 10, cylinder body; 20, cooling fins; 201, single-layer cooling fins; 202, double-layer cooling fins; 2021, cooling cavity; 2022, annular boss; 2023, upper plate; 2024, lower plate; 2025, abutment portion; 30, water inlet pipe; 40, water outlet pipe. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0026] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0027] This embodiment mainly describes the title of the water-cooled engine cylinder block, which is as follows:

[0028] Main program :

[0029] Water-cooled engine cylinder block, see attached Figure 1-Figure 6, including a cylinder body 10, a plurality of double-layer heat dissipation fins 20 are arranged on the side wall of the cylinder body 10, the heat dissipation fins 20 are arranged in parallel and have a heat dissipation cavity 2021 inside, at least one water inlet pipe 30 and at least one water outlet pipe 40 are penetrated by the heat dissipation fins 20, the side walls of the water inlet pipe 30 and the water outlet pipe 40 are provided with through holes connected to the heat dissipation cavity 2021, and the water inlet pipe 30 and the water outlet pipe 40 both have a blocking end and an external pipe end. Among them, the water inlet pipe 30 and the water outlet pipe 40 are water-cooled in a top-in-bottom-out or bottom-in-top-out manner. In this scheme, the fins outside the engine cylinder body 10 are set as a double-layer structure, and a heat dissipation cavity 2021 is formed inside, and then the heat dissipation cavities 2021 are connected through pipes. When the engine is running, the heat dissipation fins 20 are cooled by circulating water injection, and the heat generated by the engine operation is indirectly dissipated to ensure that the engine temperature is within a normal range. The structure has high heat dissipation efficiency and has the advantages of low construction difficulty.

[0030] Connection structure :

[0031] Specifically, the penetration points of the water inlet pipe 30 and the water outlet pipe 40 on the heat dissipation fin 20 are sealed by welding.

[0032] like Figure 4 As shown, the top and bottom surfaces of the heat dissipation fin 20 are provided with an annular boss 2022 surrounding the water inlet pipe 30 and the water outlet pipe 40, and the annular boss 2022 is welded to the water inlet pipe 30 / the water outlet pipe 40; the inner side wall of the annular boss 2022 is close to the side wall of the water inlet pipe 30 / the water outlet pipe 40. This structure allows welding to be performed only at the annular boss 2022, and the increase in thickness can avoid the risk of welding through, which has a higher construction tolerance.

[0033] Heat sink fin part :

[0034] like Figure 3-6 As shown, the heat dissipation fin 20 includes an upper plate body 2023 and a lower plate body 2024. The outer edges of the upper plate body 2023 and the lower plate body 2024 are bent toward each other and then extended horizontally to form abutment portion 2025 for welding. The abutment portion 2025 is used to weld the outer edges of the upper plate body 2023 and the lower plate body 2024; the inner edges of the upper plate body 2023 and the lower plate body 2024 are welded to the outer wall of the cylinder body 10. The abutment portion 2025 is used for welding to form a seal at the edge portion. In addition, when the bottom portion of the cylinder body 10 is a regular circular structure, the fin can also be integrally formed and then welded to the side wall at the bottom portion of the cylinder body 10.

[0035] Preferably, the cylinder body 10 includes a top portion and a bottom portion, the side wall of the top portion has a protrusion, the heat dissipation fins 20 of the side wall of this portion are of a single-layer structure, and the liquid inlet pipe and the liquid outlet pipe only penetrate the heat dissipation fins 20 of the single-layer structure. Since the protrusion of the top portion is not convenient for welding, it can be integrally formed with the cylinder body 10. In addition, this portion has a smaller width in the horizontal and vertical directions, so the heat dissipation cavity 2021 is not provided in this portion.

[0036] Preferably, the side wall of the bottom part of the cylinder body 10 is a circular structure, and the double-layer heat sink fins 20 are arranged on the side wall of the bottom part of the cylinder body. Since the bottom part is cylindrical in structure, it is easy to weld, so the heat sink fins 20 for water cooling are arranged there.

[0037] Pipeline distribution :

[0038] like Figure 1-2 As shown, after the top and bottom sides of the cylinder body 10 are installed, there is a gap between them and the first heat dissipation fins 20 on both sides, and the gap is used for the external connection of the water inlet pipe 30 and the water outlet pipe 40. The reserved gap is used for the external connection of the pipe to avoid interference.

[0039] Preferably, two water inlet pipes 30 and two water outlet pipes 40 are provided, and they are alternately penetrated and provided at the four corners of the heat dissipation fins 20. In this solution, providing multiple water inlet pipes 30 and water outlet pipes 40 can increase the water flow rate and improve the heat dissipation efficiency.

[0040] The above is a detailed introduction to the titles provided by the utility model. Specific examples are used in this article to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A water-cooled engine cylinder block, comprising a cylinder block body, characterized in that: A plurality of double-layer heat dissipation fins are arranged on the side wall of the cylinder body. The heat dissipation fins are arranged in parallel and have a heat dissipation cavity inside. At least one water inlet pipe and at least one water outlet pipe are penetrated through the heat dissipation fins. The side walls of the water inlet pipe and the water outlet pipe are provided with through holes connected to the heat dissipation cavity, and the water inlet pipe and the water outlet pipe both have a blocking end and an external pipe end.

2. The water-cooled engine cylinder block according to claim 1, characterized in that: The penetration points of the water inlet pipe and the water outlet pipe on the heat dissipation fin are sealed by welding.

3. The water-cooled engine cylinder block according to claim 2, characterized in that: The top and bottom surfaces of the heat dissipation fins are provided with annular bosses surrounding the water inlet pipe and the water outlet pipe, and the annular bosses are connected to the water inlet pipe / water outlet pipe by welding.

4. The water-cooled engine cylinder block according to claim 3, characterized in that: The inner side wall of the annular boss is in contact with the side wall of the water inlet pipe / water outlet pipe.

5. The water-cooled engine cylinder block according to claim 1, characterized in that: The heat dissipation fin comprises an upper plate body and a lower plate body. The outer edges of the upper plate body and the lower plate body are bent toward each other and then extended horizontally to form abutment parts for welding. The abutment parts are used to weld the outer edges of the upper plate body and the lower plate body.

6. The water-cooled engine cylinder block according to claim 5, characterized in that: The inner edges of the upper plate body and the lower plate body are welded to the outer side wall of the cylinder body.

7. The water-cooled engine cylinder block according to claim 1, characterized in that: The cylinder body comprises a top part and a bottom part, the side wall of the top part has a convex part, the heat dissipation fins of the side wall of this part are of a single-layer structure, and the liquid inlet pipe and the liquid outlet pipe only pass through the heat dissipation fins of the single-layer structure.

8. The water-cooled engine cylinder block according to claim 7, characterized in that: The side wall of the bottom part of the cylinder body is a circular structure, and the heat dissipation fins with a double-layer structure are arranged on the side wall of the bottom part of the cylinder body.

9. The water-cooled engine cylinder block according to claim 1, characterized in that: After the top side and the bottom side of the cylinder body are installed, there is a distance between them and the first heat dissipation fins on both sides, and the distance is used for external pipes of the water inlet pipe and the water outlet pipe.

10. The water-cooled engine cylinder block according to claim 1, characterized in that: Two water inlet pipes and two water outlet pipes are provided, and they are alternately penetrated at the four corners of the heat dissipation fins.

Images