CN114635808A

CN114635808A - Motorcycle water-cooled engine

Info

Publication number: CN114635808A
Application number: CN202210322849.5A
Authority: CN
Inventors: 伍毅; 刘学刚; 周林; 蒋旺
Original assignee: Chongqing Yingang Technology Group Co Ltd
Current assignee: Chongqing Yingang Technology Group Co Ltd
Priority date: 2022-01-14
Filing date: 2022-03-30
Publication date: 2022-06-17
Also published as: CN217029108U

Abstract

The invention discloses a motorcycle water-cooled engine which comprises an engine body and a water cooling system, wherein the engine body comprises an engine shell, a cylinder body and a cylinder head, the water cooling system comprises a water pump groove, a water pump cover, an impeller, a main water inlet, a cooling water pipe, a first water channel and a second water channel, the water pump groove is arranged on the engine shell and corresponds to the position of a rotating shaft, the impeller is positioned in the water pump groove and wound on a balance shaft, the main water inlet is communicated with the water pump groove, the cooling water pipe is communicated with the water pump groove, the first water channel is arranged in the cylinder body and is communicated with the cooling water pipe, the second water channel is arranged in the cylinder head and is communicated with the first water channel, and the cylinder head is provided with a main water outlet communicated with the second water channel. According to the invention, the water pump groove is arranged on the shell of the engine, the water inlet is arranged on the cylinder body, and the slow flow passage is arranged in the cylinder head, so that cooling water in the cylinder body can be quickly discharged, the heat exchange efficiency of the cylinder body is improved, and the structure is simple and compact.

Description

Motorcycle water-cooled engine

Technical Field

The invention relates to the technical field of motorcycle manufacturing, in particular to a motorcycle water-cooled engine.

Background

At present, a water-cooled engine generally presses cooling water into an annular flow channel arranged in a cylinder head from a water inlet on the side wall of the cylinder head, the cooling water is divided into two parts at the inlet of the annular flow channel and flows into the cylinder body at the lower end, the divided cooling water cools the cylinder body and then flows back into the cylinder head at the position close to a water outlet on the other side, and finally flows out through the water outlet.

Disclosure of Invention

The invention aims to provide a motorcycle water-cooled engine capable of improving the cooling efficiency of a cylinder body.

The technical scheme of the invention is as follows:

a motorcycle water-cooled engine comprises an engine body and a water cooling system, wherein the engine body comprises an engine shell, a cylinder body and a cylinder head, the water cooling system comprises a water pump groove, a water pump cover, a total water inlet, a cooling water pipe, a first water channel and a second water channel, the water pump groove is formed in the engine shell and corresponds to the position of a rotating shaft, the water pump cover is used for sealing the water pump groove, the total water inlet is located in the water pump groove and communicated with the water pump groove around an impeller arranged on the rotating shaft, the cooling water pipe is communicated with the water pump groove, the first water channel is arranged in the cylinder body and communicated with the cooling water pipe, the second water channel is arranged in the cylinder head and communicated with the first water channel, and the cylinder head is provided with a total water outlet communicated with the second water channel.

By adopting the structure, the impeller drives the cooling water in the water pump groove to turn over, and the cooling water is guided into the water inlet pipe and enters the first water channel in the cylinder body along the water pump cover, and after the cooling water enters the cylinder head upwards, one part of the cooling water is quickly discharged to the main water outlet through the second water channel, so that the cooling water in the cylinder body is quickly discharged, the other part of the cooling water flows to the slow flow channel through the second water channel and then flows to the main water outlet to be converged, the stroke of the cooling water is increased through the second water channel, the cooling period of the cooling water in the cylinder head is prolonged, part of the cooling water flows out later than the cooling water directly distributed to the main water outlet, and further stable pressure distribution is formed in the water inlet direction of the main water outlet, most of the cooling water in the cylinder body flows into the main water outlet before the cooling water in the cylinder head, and the heat exchange efficiency of the cylinder body is improved; when the water channels are filled with cooling water, the cooling water in the cylinder body can rush the resistance of the cooling water in the cylinder head due to the power of the cooling water discharged into the cylinder body, the cooling water is discharged to the main water outlet more frequently, the cooling water in the second water channel is prolonged in the cooling path, the cooling water in the cylinder body is discharged more smoothly, the heat exchange efficiency of the cylinder head is improved, and the cooling effect of the cylinder body and the cylinder head is improved.

In order to simplify the structure and facilitate the installation, the water pump groove is formed by inwards recessing from one end position of the engine shell corresponding to the rotating shaft, the groove bottom of the water pump groove is provided with a through hole, a bearing assembly is embedded in the through hole, and the end head of the rotating shaft penetrates through the bearing assembly to be positioned in the water pump groove; the impeller is annularly arranged on the end head to generate kinetic energy along with the rotation of the rotating shaft.

In order to facilitate the cooling water to be quickly discharged into the cooling water pipe, preferably, the bottom of the water pump tank is provided with a spiral first step surface arranged around the through hole and a deep groove communicated with the first step surface, and the depression depth of the deep groove is greater than that of the first step surface; and a water outlet communicated with the water inlet end of the cooling water pipe is formed in the position, corresponding to the bottom of the deep groove, of the engine shell.

In order to simplify the structure of the water pump cover and facilitate water drainage, preferably, a second step surface is formed at the position of the water pump cover corresponding to the first step surface, and the first step surface and the second step surface are combined to form a vortex-shaped pressurizing and guiding channel; the water pump cover is provided with a main water inlet which is communicated with the pressurizing and flow guiding channel.

In order to accelerate the flow of the cooling water at the bottom of the first water channel, preferably, a water inlet is formed in one side of the side wall of the cylinder body, which is close to the main water outlet, and a water outlet end of the cooling water pipe penetrates into the water inlet to be communicated with the first water channel.

In order to simplify the structure, preferably, the first water channel is an annular water channel arranged around the cylinder body, the side wall of the cylinder body forms an annular outer side wall of the annular water channel, an annular inner side wall is formed in the side wall of the cylinder body, and the bottoms of the annular inner side wall and the annular outer side wall are sealed to form a bottom wall of the annular water channel.

In order to ensure the cooling efficiency of the cylinder, the height of the first water channel is preferably adapted to the height of the cylinder.

In order to ensure the rapid flow of the cooling water and improve the heat exchange efficiency, preferably, the second water channel is also annular on the horizontal projection plane and is matched with the first water channel in shape, and a plurality of water inlet holes communicated with the first water channel are formed in the lower end of the second water channel.

In order to prolong the stroke of cooling water in the cylinder head, preferably, the water inlet and the main water outlet are used as boundaries on a horizontal plane projection, a shorter arc-shaped section between the water inlet and the main water outlet on the second water channel is a first water flow section, and a longer arc-shaped section between the water inlet and the main water outlet on the second water channel is a second water flow section; at least one part of the second water flow section is a slow flow section, and the bottom surface of the slow flow section is higher than that of the second water flow section.

In order to simplify the structure, preferably, the slow flow section is a winding structure in a horizontal plane projection, and two ends of the winding structure are respectively communicated with corresponding positions of the second water flow section.

In order to make the cooling water perform sufficient heat exchange, preferably, the water cooling system further includes a transition section formed between the second water channel and the main water outlet, one end of the transition section is communicated with a joint of the first water flow section and the second water flow section, the other end of the transition section is communicated with the main water outlet, and the transition section is in a Z-shaped structure with a low inside and a high outside in the vertical direction.

Has the advantages that: according to the invention, the water pump groove is arranged on the engine shell, the water inlet is arranged on the cylinder body, and the slow flow passage is arranged in the cylinder head, so that cooling water in the cylinder body can be quickly discharged, the heat exchange efficiency of the cylinder body is improved, and the structure is simple and compact.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of an installation structure of a water pump cover and a water pump tank.

Fig. 3 is a schematic structural view of the cylinder head and the connecting hole.

Fig. 4 is a schematic structural view of the second water passage and the slow flow passage.

Fig. 5 is a schematic structural diagram of a water pump groove and a water channel mold core.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1, 2, 3, 4 and 5, the present invention includes an engine block and a water cooling system. The engine body comprises an engine shell, a cylinder body 2 and a cylinder head 3, wherein a main water inlet 123 is arranged on the engine shell, a main water outlet 33 is arranged on the cylinder head 3, one end of the water cooling system is communicated with the main water inlet 123, and the other end of the water cooling system is communicated with the main water outlet 33. Cooling water (external water source, cooling liquid, etc.) enters the water cooling system, passes through the cylinder body 2 and the cylinder head 3, and then flows out from the main water outlet 33.

The water cooling system includes a water pump tank 1 disposed on the engine housing at a position corresponding to one of the rotating shafts (such as a crankshaft, a camshaft, and a balance shaft, which are described in detail in this embodiment taking the balance shaft as an example) that can increase water pressure, a water pump cover 12 for sealing the water pump tank 1, an impeller 4 disposed in the water pump tank 1 and wound around the balance shaft, a total water inlet 123 communicated with the water pump tank 1, a cooling water pipe 11 communicated with the water pump tank 1, a first water channel 21 disposed in the cylinder block 2 and communicated with the cooling water pipe 11, and a second water channel 31 disposed in the cylinder head 3 and communicated with the first water channel 21. A water inlet is formed in the side wall of the cylinder body 2, and the water outlet end of the cooling water pipe 11 penetrates through the water inlet to be communicated with the first water channel 21.

In this embodiment, the water pump groove 1 is formed by inward recessing of the engine housing, that is, the portion of the engine housing corresponding to the balance shaft is inward recessing to form the inward recessing water pump groove 1, a water outlet is formed on the engine housing corresponding to the water pump groove 1, and the cooling water pipe 11 is communicated with the water pump groove 1 through the water outlet. So set up, can reduce the setting degree of difficulty of water pump groove 1, can accomplish through integrative technology, need not to add in addition components of a whole that can function independently, increase the uniformity, integrality, the wholeness of engine housing, reduce the technology degree of difficulty, practice thrift the cost. The bottom of the water pump tank 1 is provided with a through hole, a bearing assembly is embedded in the through hole, and the end head of the balance shaft penetrates through the bearing assembly to be positioned in the water pump tank 1; the impeller 4 is annularly arranged on the end head to generate kinetic energy along with the rotation of the balance shaft. So set up, through simple ingenious design, only need change the engine housing shape, make the engine housing form water pump tank 1 to make the end of balanced axle be located in the water pump tank 1, lieing in impeller 4 is established to the cover on the end in the water pump tank 1, can pass through the rotation of balanced axle drives impeller 4 and rotates, thereby produces water pump kinetic energy. Need not to purchase in addition and increase the water pump, utilize original structure, can satisfy the demand through simple equipment design, further reduced purchasing cost, manufacturing cost, assembly cost, improve packaging efficiency, have high practicality.

Preferably, the groove bottom of the water pump groove 1 is provided with a spiral first step surface 122 arranged around the through hole and a deep groove communicated with the first step surface 122, and the concave depth of the deep groove is greater than that of the first step surface 122; the water outlet is formed at the position of the engine shell corresponding to the bottom of the deep groove. Correspondingly, a second step surface 121 is formed at a position of the water pump cover 12 corresponding to the first step surface, the first step surface 122 and the second step surface 121 are involuted to form a vortex-shaped pressurizing and flow guiding channel, the water pump cover 12 is provided with the main water inlet 123, and the main water inlet 123 is communicated with the pressurizing and flow guiding channel.

The height of the first water channel 21 is matched with that of the cylinder body 2, the first water channel 21 is an annular water channel arranged around the cylinder body 2, the side wall of the cylinder body 2 forms an annular outer side wall of the annular water channel, an annular inner side wall is formed in the side wall of the cylinder body 2, the bottom of the annular inner side wall and the bottom of the annular outer side wall are sealed to form a bottom wall of the annular water channel, the top of the annular inner side wall and the top of the annular outer side wall are sealed to form a top wall of the annular water channel, and a plurality of water outlet holes are formed in the top wall.

In this embodiment, the water inlet is disposed at a position on a side wall of the cylinder 2, which is close to the main water outlet 33. The second water channel 31 is also annular on the horizontal projection plane and is matched with the first water channel 21 in shape, and a plurality of water inlet holes 34 communicated with the second water channel 31 are formed in the positions, corresponding to the water outlet holes, of the second water channel 31. Use on the horizontal plane projection water inlet and total delivery port are the boundary, lie in on the second water course 31 a shorter arc section between water inlet and the total delivery port 33 is first water flow section 311, second water course 31 is located a longer arc section is second water flow section 312 between water inlet and the total delivery port 33. At least a part of the second flow path 312 (the at least a part refers to at least one segment of the second flow path 312 and at most the whole segment of the second flow path) is a slow flow path 32, and the bottom surface of the slow flow path 32 is higher than the bottom surface of the first flow path 311. The slow flow section 32 is a roundabout structure in a horizontal plane projection, specifically, a "V" shaped structure is adopted in this embodiment, and two ends of the "V" shaped structure are respectively communicated with corresponding positions of the second water flow section 312. The circuitous shape includes, but is not limited to, a "V" shape, a "W" shape, an "S" shape, a wave shape, a serpentine shape, etc. in a horizontal plane projection.

In this embodiment, preferably, a transition section 35 is provided between the second water channel 31 and the main water outlet 33, one end of the transition section 35 is communicated with the junction of the first water flow section 311 and the second water flow section 312, the other end of the transition section 35 is communicated with the main water outlet 33, and the transition hole 35 is in a "Z" shape structure with a low inside and a high outside in the vertical direction.

The using method of the invention is as follows:

as shown in fig. 1 and 2, the balance shaft extends from a position on the engine housing corresponding to the water pump tank 1, the extending end of the balance shaft is sleeved with the upper impeller 4, the water pump cover 12 is fastened at the position of the water pump tank 1 to form a structure of the water pump, cooling water flows into the water pump tank 1 from the water tank through the main water inlet 123, the balance shaft drives the impeller 4 to rotate to drive the cooling water in the water pump tank 1 to turn over, and the cooling water is guided into the second step surface 122 along the water pump cover 12 and then enters the first water channel 21 in the cylinder 2 after passing through the cooling water pipe 11.

As shown in fig. 3, 4 and 5, eight connecting holes 34 are uniformly formed around the annular first water channel 31 (the specific number may be determined according to different embodiments), one part of the connecting holes is quickly discharged to the position of the total water outlet 33 through the first water channel 311 of the second water channel 21 and is accumulated, so as to be beneficial for quickly discharging the cooling water in the cylinder 2, the other part of the connecting holes is flowed to the slow water channel 32 through the second water channel 312 and is accumulated and then gradually flowed to the position of the total water outlet 33, wherein the plane of the bottom of the slow water channel 32 is higher than the plane of the bottom of the second water channel 31, that is, the water level of the slow water channel 32 is higher than the water level of the second water channel 31, the cooling water has a process of lifting and accumulating water before flowing into the slow water channel 32, and then flows from the slow water channel 32 to the total water outlet 33 through the second water channel 31, the water level decreases the flow rate and increases to form a certain potential energy, and the slow water channel 32 increases the stroke of the cooling water, the cooling period of the cooling water in the cylinder head 3 is prolonged, the cooling water flows out later than the cooling water directly distributed to the position of the main water outlet 33, stable pressure distribution is formed in the water inlet direction of the main water outlet channel 33, most of the cooling water in the cylinder body 2 flows into the position of the main water outlet channel 33 before the cooling water in the cylinder head 3, and the heat exchange efficiency of the cylinder body is improved.

In the process, as the transition hole 35 is communicated between the second water channel 31 and the main water outlet 33, the transition hole 35 is in a Z-shaped structure with a low inside and a high outside in the vertical direction, a process of accumulating cooling water from low to high can be formed, the period of absorbing heat in the cylinder head 3 by the cooling water is increased, and the heat exchange efficiency of the cylinder head 3 is also improved.

When the three water channels are filled with cooling water, the flow sequence of the cooling water in the cylinder body 2 and the cylinder head 3 is generated, the cooling water in the cylinder body 2 is discharged more smoothly, and most of the cooling water in the cylinder body 2 is always discharged firstly.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on 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 claims of the present invention.

Claims

1. A motorcycle water-cooled engine comprises an engine body and a water cooling system, wherein the engine body comprises an engine shell, a cylinder body (2) and a cylinder head (3), and is characterized in that: the water cooling system comprises a water pump groove (1) which is arranged on the shell of the engine and corresponds to the position of a rotating shaft, a water pump cover (12) which is used for sealing the water pump groove (1), an impeller (4) which is positioned in the water pump groove (1) and winds the rotating shaft, a total water inlet (123) which is communicated with the water pump groove (1), a cooling water pipe (11) which is communicated with the water pump groove (1), a first water channel (21) which is arranged in the cylinder body (2) and communicated with the cooling water pipe (11) and a second water channel (31) which is arranged in the cylinder head (3) and communicated with the first water channel (21), wherein the cylinder head (3) is provided with a total water outlet (33) which is communicated with the second water channel (31).

2. A motorcycle water-cooled engine as set forth in claim 1, characterized in that: the water pump groove (1) is formed by inwards recessing the position of one end of the engine shell corresponding to the rotating shaft, a through hole is formed in the bottom of the water pump groove (1), a bearing assembly is embedded in the through hole, and the end of the rotating shaft penetrates through the bearing assembly to be located in the water pump groove (1); the impeller (4) is annularly arranged on the end head to generate kinetic energy along with the rotation of the rotating shaft.

3. A motorcycle water-cooled engine as set forth in claim 1, characterized in that: the bottom of the water pump tank (1) is provided with a spiral first step surface (122) arranged around the through hole and a deep groove communicated with the first step surface (122), and the depth of the deep groove is greater than that of the first step surface (122); and a water outlet communicated with the water inlet end of the cooling water pipe (11) is formed in the position, corresponding to the bottom of the deep groove, of the engine shell.

4. A motorcycle water-cooled engine as set forth in claim 3, characterized in that: a second step surface (121) is formed at the position, corresponding to the first step surface, of the water pump cover (12), and the first step surface (122) and the second step surface (121) are combined to form a vortex-shaped pressurizing and guiding channel; the water pump cover (12) is provided with a main water inlet (123), and the main water inlet (123) is communicated with the pressurizing flow guide channel.

5. A motorcycle water-cooled engine as set forth in any one of claims 1 through 4, characterized in that: a water inlet is formed in one side, close to the main water outlet, of the side wall of the cylinder body (2), and a water outlet end of the cooling water pipe (11) penetrates into the water inlet to be communicated with the first water channel (21).

6. A motorcycle water-cooled engine as set forth in claim 5, characterized in that: the first water channel (21) is an annular water channel arranged around the cylinder body (2), the side wall of the cylinder body (2) forms an annular outer side wall of the annular water channel, an annular inner side wall is formed in the side wall of the cylinder body (2), and the annular inner side wall and the bottom of the annular outer side wall are sealed to form a bottom wall of the annular water channel.

7. A motorcycle water-cooled engine as set forth in claim 6, characterized in that: the height of the first water channel (21) is matched with that of the cylinder body (2).

8. A motorcycle water-cooled engine as set forth in claim 1, characterized in that: the second water channel (31) is also annular on the horizontal projection plane and is matched with the first water channel (21) in shape, and a plurality of water inlet holes (34) communicated with the first water channel (21) are formed in the lower end of the second water channel (31).

9. A motorcycle water-cooled engine as set forth in claim 1, characterized in that: in the horizontal plane projection, the water inlet and the main water outlet are used as boundaries, a shorter arc-shaped section between the water inlet and the main water outlet (33) on the second water channel (31) is a first water flow section (311), and a longer arc-shaped section between the water inlet and the main water outlet (33) on the second water channel (31) is a second water flow section (312); at least one part of the second water flow section (312) is a slow flow section (32), and the bottom surface of the slow flow section (32) is higher than that of the second water flow section (312).

10. A motorcycle water-cooled engine as set forth in claim 9, characterized in that: the slow flow section (32) is of a roundabout structure in horizontal plane projection, and two ends of the roundabout structure are respectively communicated with corresponding positions of the second water flow section (312).

11. A motorcycle water-cooled engine as set forth in claim 9, characterized in that: the water cooling system further comprises a transition section (35) formed between the second water channel (31) and the main water outlet (33) in a communicated mode, one end of the transition section (35) is communicated with the joint of the first water flow section (311) and the second water flow section (312), the other end of the transition section (35) is communicated with the main water outlet 33, and the transition section (35) is of a Z-shaped structure with the inner part being low and the outer part being high in the vertical direction.