Structure of special engine cylinder cover for high-pressure fuel system

Abstract

The invention discloses a structure of an engine cylinder cover special for a high-pressure fuel system, and relates to the technical field of engines, the structure comprises a cylinder cover, a cooling mechanism is arranged at the lower end of the cylinder cover, heat generated by the cylinder cover and a cylinder body is dredged through water flow, and a limiting mechanism is arranged on the outer side of the cylinder cover and used for limiting part of the structure of the cooling mechanism. An anti-diffusion mechanism is arranged at the upper end of the limiting mechanism and used for preventing heat of the cooling mechanism from diffusing outwards; the cooling mechanism comprises a mounting plate and a cooling assembly, a detachable water pump is mounted at the upper end of the mounting plate, and a transmission assembly is mounted at the output end of the water pump. Through the unique design of the cooling liquid channel, the absorption capacity of the cooling liquid to the heat of the cylinder cover can be greatly improved, the heat dissipation efficiency is greatly improved, extra heat generated by a high-pressure fuel system can be effectively taken away in time, the temperature of the cylinder cover of the engine is reduced, and the reliability and durability of the engine are improved.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to a structure of a cylinder head of an engine dedicated to a high-pressure fuel system. Background Art

[0002] An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines usually convert chemical energy into mechanical energy. With the development of engine technology, high-pressure fuel systems have been widely used because they can improve fuel injection accuracy and combustion efficiency, and have become an important part of modern internal combustion engines.

[0003] However, in the prior art, when the high-pressure fuel system is working, the high-pressure injection and intense combustion process of the fuel will generate a large amount of additional heat. The heat dissipation structure of the traditional engine cylinder head is difficult to cope with this heat, resulting in excessive engine temperature, which seriously affects the engine performance and reliability. At the same time, the intervention of the high-pressure fuel system changes the original thermal balance state of the engine, and the temperature distribution in the combustion chamber is uneven, which is easy to cause problems such as knock. The heat generated by components such as the high-pressure oil pump also increases the difficulty of thermal management. Therefore, a structure of a special engine cylinder head for a high-pressure fuel system is proposed. Summary of the invention

[0004] The object of the present invention is to provide a structure of a cylinder head for an engine specially used for a high-pressure fuel system, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a structure of a cylinder head for a high-pressure fuel system engine, comprising a cylinder head, a cooling mechanism is arranged at the lower end of the cylinder head, and the heat generated by the cylinder head and the cylinder body is guided by water flow, a limiting mechanism is arranged at the outer side of the cylinder head, which is used to limit a part of the structure of the cooling mechanism, and an anti-diffusion mechanism is arranged at the upper end of the limiting mechanism, which is used to prevent the heat of the cooling mechanism from diffusing outward; The cooling mechanism comprises a mounting plate and a cooling assembly, a detachable water pump is mounted on the upper end of the mounting plate, a transmission assembly is mounted on the output end of the water pump, a fixing assembly is inserted through one end of the mounting plate, and a part of the fixing assembly is fixed to the outer wall of the cylinder head; The cooling assembly includes a spiral cooling pipe, a layer of cooling pipe is welded to the upper end of the cylinder head, and the outer wall of the cylinder head is sleeved with two layers of cooling pipes, a connecting pipe is fixedly installed on one end of the first layer of cooling pipe, a No. 1 special-shaped pipe is fixedly installed on the other end of the first layer of cooling pipe, and a No. 2 special-shaped pipe is fixedly installed on one end of the second layer of cooling pipe, a triangular spoiler is fixedly installed on the inner wall of the spiral cooling pipe, and U-shaped spoilers are fixedly installed on the inner walls of the first layer of cooling pipe and the second layer of cooling pipe.

[0006] Preferably, the spiral cooling pipe is located below the cylinder cover, and the other end of the connecting pipe is fixed to the water outlet end of the water pump.

[0007] Preferably, the other end of the No. 1 special-shaped pipe is connected to the other end of the second-layer cooling pipe, and the other end of the No. 2 special-shaped pipe is connected to one end of the spiral cooling pipe.

[0008] Preferably, the limiting mechanism includes two groups of connecting plates and a clamping assembly, multiple groups of vertical blocks are welded to one side of the two groups of connecting plates, and semicircular seats are welded to the lower ends of the multiple groups of vertical blocks. A No. 1 clamping seat is welded on one side of the cylinder head, and a No. 2 clamping seat is welded on the other side of the cylinder head. A No. 1 clamping block is inserted into the reserved groove of the No. 2 clamping seat, and a No. 2 clamping block is inserted into the reserved groove of the No. 1 clamping seat. A connecting frame is fixedly installed on one side of the two groups of connecting plates, and the inner walls of the multiple groups of semicircular seats are in contact with the outer wall of the second layer of cooling pipes.

[0009] Preferably, one side of the two groups of connecting plates are respectively in contact with the two sides of the cylinder head, one end of the No. 1 clamping block is fixed to one side of one group of connecting plates, and one end of the No. 2 clamping block is fixed to one side of the other group of connecting plates.

[0010] Preferably, a limiting block is welded at one end of the two groups of connecting frames, and the clamping assembly includes two groups of square seats. Push-down plates are provided inside the two groups of square seats for sliding up and down, support springs are fixedly installed at the top ends of the two groups of square seats, and limiting grooves are provided on both sides of the two groups of square seats.

[0011] Preferably, one end of the two groups of square seats are fixed to one end of the cylinder cover, the lower ends of the two groups of support springs are respectively fixed to the upper ends of the two groups of push-down plates, and the two groups of limit blocks are respectively inserted into the interior of the two groups of limit grooves.

[0012] Preferably, the lower ends of the two groups of push-down plates are in contact with the upper ends of the two groups of limit blocks respectively, the lower ends of the two groups of square seats are penetrated by long holes, and the protrusions at the lower ends of the two groups of limit blocks are respectively inserted into the interior of the two groups of long holes.

[0013] Preferably, the anti-diffusion mechanism includes a flexible nano thermal insulation board 1, support plates are inserted into the upper end openings of multiple groups of vertical blocks, flexible nano thermal insulation boards 2 are fixedly installed on both sides of the flexible nano thermal insulation board 1, and flexible nano thermal insulation boards 3 are fixedly installed on both ends of the flexible nano thermal insulation board 1.

[0014] Preferably, the flexible nano thermal insulation board 1 is located above the cylinder cover, and the upper ends of the plurality of support plates are fixed to the lower side of the flexible nano thermal insulation board 1.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By setting up a cooling component, the first layer of cooling pipes and the second layer of cooling pipes are in close contact with the top and outer wall of the cylinder head respectively, which can effectively absorb the heat on the surface of the cylinder head, and the spiral cooling pipe is wrapped around the outer wall of the cylinder body, so that the coolant can be better close to the high-temperature area, thereby enhancing the heat exchange efficiency, increasing the flow path and contact area of ​​the coolant, and preventing the heat in the cylinder body from gathering on the cylinder head. At the same time, by setting U-shaped spoilers inside the first layer of cooling pipes and the second layer of cooling pipes, and setting triangular spoilers inside the spiral cooling pipes, the flow state of the coolant inside the first layer of cooling pipes, the second layer of cooling pipes and the spiral cooling pipes can be changed to generate turbulence, thereby further improving the heat dissipation effect. Through this unique coolant channel design, the coolant's ability to absorb cylinder head heat can be greatly improved, the heat dissipation efficiency is greatly improved, the extra heat generated by the high-pressure fuel system can be effectively taken away in time, the engine cylinder head temperature can be reduced, and the reliability and durability of the engine can be improved.

[0016] 2. By setting up an anti-diffusion mechanism, a flexible nano-insulation board 1, two groups of flexible nano-insulation boards 2 and two groups of flexible nano-insulation boards 3 are respectively set between the combustion chamber and other parts of the cylinder head. This can not only prevent heat from diffusing to the surroundings, but also quickly disperse the locally concentrated heat evenly to a larger area, and then the heat is taken away by a first-layer cooling pipe, a second-layer cooling pipe and a spiral cooling pipe, thereby improving the uniformity of temperature distribution inside the cylinder head, reducing the risk of detonation, and improving the overall thermal stability of the engine.

[0017] 3. By setting a limiting mechanism, the No. 2 clamping block is inserted into the No. 1 clamping seat, and the No. 1 clamping block is inserted into the No. 2 clamping seat, and the two groups of limiting blocks are respectively inserted into the corresponding limiting grooves. At this time, the inner walls of multiple groups of semicircular seats are in contact with the outer walls of the second-layer cooling pipes, which is convenient for multiple groups of semicircular seats to support the second-layer cooling pipes; and by setting a clamping assembly, it is convenient for the two groups of support springs to push the two groups of limiting blocks to move through the two groups of push-down plates, so that the protruding parts of the two groups of limiting blocks are respectively inserted into the long holes of the two groups of square seats, and then the two groups of limiting blocks can be respectively fixed inside the two groups of square seats, so that the two groups of limiting blocks can be fixed to improve the fixity of the two groups of connecting plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the structure of the engine cylinder head dedicated to the high-pressure fuel system of the present invention; Figure 2 A partial top view of the structure of a cylinder head for an engine specially used for a high-pressure fuel system of the present invention; Figure 3 It is a partial three-dimensional view of the structure of a cylinder head of an engine specially used for a high-pressure fuel system of the present invention; Figure 4 A three-dimensional diagram of a cooling mechanism in the structure of a cylinder head for an engine specially used for a high-pressure fuel system of the present invention; Figure 5 It is a partial structural schematic diagram of a cooling assembly in the structure of a cylinder head for a high-pressure fuel system of the present invention; Figure 6 The structure of the cylinder head of the engine dedicated to the high pressure fuel system of the present invention Figure 5 A is a schematic diagram of the enlarged structure of the middle part; Figure 7 A three-dimensional diagram of a triangular spoiler in the structure of a cylinder head for a high-pressure fuel system of the present invention; Figure 8 The structure of the cylinder head of the engine dedicated to the high pressure fuel system of the present invention Figure 5 A schematic diagram of the enlarged structure of B; Fig. 9 The laminar and turbulent flow diagrams of the structure of the cylinder head for the high pressure fuel system of the present invention; Fig.10 It is a three-dimensional diagram of a first-layer cooling pipe, a second-layer cooling pipe and a limiting mechanism in the structure of a cylinder head for a high-pressure fuel system of the present invention; Fig.11 It is a side view of the limiting mechanism in the structure of the cylinder head of the engine specially used for the high-pressure fuel system of the present invention; Fig.12 It is a structural schematic diagram of a connecting frame and a square seat in the structure of a cylinder head specially used for a high-pressure fuel system of the present invention; Fig.13 It is a structural schematic diagram of a cylinder head, a mounting plate and a square seat in the structure of a cylinder head for a high-pressure fuel system of the present invention; Fig.14 A bottom view of the anti-diffusion mechanism in the structure of the cylinder head of the engine dedicated to the high-pressure fuel system of the present invention; Fig.15 It is a schematic diagram of the exploded structure of the vertical block and the support plate in the structure of the engine cylinder head specially used for the high-pressure fuel system of the present invention.

[0019] In the figure: 1. Cylinder head; 2. Cooling mechanism; 21. Mounting plate; 22. Water pump; 23. Cooling assembly; 231. First-layer cooling pipe; 232. Spiral cooling pipe; 233. Second-layer cooling pipe; 234. Connecting pipe; 235. No. 1 special-shaped pipe; 236. No. 2 special-shaped pipe; 237. Triangular spoiler; 238. U-shaped spoiler; 24. Transmission assembly; 25. Fixing assembly; 3. Limiting mechanism; 31. Vertical block; 311. Semicircular seat; 32. Snap-on assembly; 321. Square seat; 322. Push-down plate; 323. Support spring; 324. Limiting groove; 33. Connecting plate; 34. No. 1 snap-on seat; 35. No. 2 snap-on seat; 36. No. 1 snap-on block; 37. No. 2 snap-on block; 38. Connecting frame; 39. Limiting block; 4. Anti-diffusion mechanism; 41. Support plate; 42. Flexible nano thermal insulation board one; 43. Flexible nano thermal insulation board two; 44. Flexible nano thermal insulation board three. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Reference Figures 1 to 15 As shown: the structure of the cylinder head of the engine dedicated to the high-pressure fuel system includes a cylinder head 1, a cooling mechanism 2 is arranged at the lower end of the cylinder head 1, and the heat generated by the cylinder head 1 and the cylinder body is guided by water flow, a limiting mechanism 3 is arranged on the outer side of the cylinder head 1, which is used to limit the partial structure of the cooling mechanism 2, and an anti-diffusion mechanism 4 is arranged at the upper end of the limiting mechanism 3, which is used to prevent the heat of the cooling mechanism 2 from diffusing outward; The cooling mechanism 2 includes a mounting plate 21 and a cooling assembly 23. A detachable water pump 22 is mounted on the upper end of the mounting plate 21. A transmission assembly 24 is mounted on the output end of the water pump 22. A fixing assembly 25 is inserted through one end of the mounting plate 21, and a part of the fixing assembly 25 is fixed to the outer wall of the cylinder head 1. The cooling assembly 23 includes a spiral cooling pipe 232, a layer of cooling pipe 231 is welded to the upper end of the cylinder head 1, and a second layer of cooling pipe 233 is sleeved on the outer wall of the cylinder head 1. A connecting pipe 234 is fixedly installed on one end of the first layer of cooling pipe 231, and a No. 1 special-shaped pipe 235 is fixedly installed on the other end of the first layer of cooling pipe 231, and a No. 2 special-shaped pipe 236 is fixedly installed on one end of the second layer of cooling pipe 233. A triangular spoiler 237 is fixedly installed on the inner wall of the spiral cooling pipe 232, and U-shaped spoilers 238 are fixedly installed on the inner walls of the first layer of cooling pipe 231 and the second layer of cooling pipe 233. The spiral cooling pipe 232 is located below the cylinder head 1, and the other end of the connecting pipe 234 is fixed to the water outlet end of the water pump 22, the other end of the No. 1 special-shaped pipe 235 is connected to the other end of the second layer of cooling pipe 233, and the other end of the No. 2 special-shaped pipe 236 is connected to one end of the spiral cooling pipe 232.

[0022] In this embodiment, a layer of cooling pipe 231 is welded to the top of the cylinder head 1, and a second layer of cooling pipe 233 is sleeved on the outer wall of the cylinder head 1. Since the spiral cooling pipe 232 is made of a material with a certain elasticity, such as a specially modified aluminum alloy or a high-performance elastic engineering plastic, this elastic property enables the spiral cooling pipe 232 to better fit the complex contour of the engine cylinder body and tightly wrap the cylinder body. Then the spiral cooling pipe 232 is tightly wrapped on the outer wall of the cylinder body, and then the transmission component 24 is connected to the transmission component on the engine, so that the power on the engine is transmitted to the water pump 22 through the transmission component 24, which is convenient for providing power to the water pump 22. The interior of the water pump 22 generally adopts a centrifugal structure. When the impeller rotates at a high speed in the pump housing, A low-pressure area will be formed at the center of the impeller, so that the coolant in the coolant storage tank is sucked into the pump. Then, under the action of centrifugal force, the water is thrown to the edge of the impeller and transported to the coolant channel of the engine at a higher pressure and speed, pushing the water to circulate in the entire cooling mechanism 2. At the same time, the water pump 22 can accurately control the flow of the coolant according to the speed and load of the engine. When the engine is running at a high load and generating a lot of heat, the speed of the water pump 22 increases accordingly, increasing the circulation amount of the coolant to ensure that the engine is fully cooled; when the engine is under low load or cold starting, the speed of the water pump 22 decreases, reducing the coolant flow, which is conducive to the rapid heating of the engine to reach the normal operating temperature, improving fuel economy and engine efficiency; The coolant is introduced into the interior of the connecting pipe 234 through the water pump 22, flows into the interior of the second cooling pipe 233 through the first cooling pipe 231 and the first special-shaped pipe 235, and then flows into the interior of the spiral cooling pipe 232 through the second special-shaped pipe 236, so that the coolant flows inside the first cooling pipe 231, the second cooling pipe 233 and the spiral cooling pipe 232, which can effectively absorb the heat on the surface of the cylinder head 1 and the heat on the outer wall of the cylinder body, thereby preventing the heat in the cylinder body from gathering at the cylinder head 1; During the internal flow of the coolant in the first cooling tube 231, the second cooling tube 233 and the spiral cooling tube 232, the coolant can generate turbulent flow in the first cooling tube 231, the second cooling tube 233 and the spiral cooling tube 232 under the action of the two groups of U-shaped spoilers 238 and the triangular spoiler 237, thereby further improving the heat dissipation effect. This unique coolant channel design can greatly improve the coolant's ability to absorb heat from the cylinder head 1, greatly improve the heat dissipation efficiency, effectively take away the extra heat generated by the high-pressure fuel system in time, reduce the temperature of the engine cylinder head 1, and improve the reliability and durability of the engine. In pipeline transportation, turbulence helps reduce the flow resistance of the fluid and improve the transportation efficiency. Although the flow state of turbulence seems complex and chaotic, it can actually make the velocity distribution of the fluid on the pipeline cross section more uniform, reduce the influence of the boundary layer, and thus reduce the friction resistance. During turbulence, there is strong disturbance and mixing inside the fluid, which speeds up the transfer of heat and mass. The spiral cooling tube 232 is made of a material with a certain elasticity. This elasticity makes it easy for the staff to adjust the shape of the spiral cooling tube 232 so that the spiral cooling tube 232 can better fit the complex contour of the engine cylinder block and tightly wrap the cylinder block, effectively reducing the thermal resistance between the coolant and the cylinder block, ensuring that the coolant can absorb the heat emitted by the cylinder head 1 in all directions and without dead angles; The arrangement of the mounting plate 21 facilitates the mounting plate 21 to support the water pump 22 , and the arrangement of the fixing assembly 25 can fix the mounting plate 21 to the outer wall of the cylinder head 1 .

[0023] Embodiment 2: According to Figure 2 , Figure 3 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.15 As shown, the limiting mechanism 3 includes two groups of connecting plates 33 and a clamping assembly 32, one side of the two groups of connecting plates 33 is welded with multiple groups of vertical blocks 31, the lower ends of the multiple groups of vertical blocks 31 are welded with semicircular seats 311, one side of the cylinder head 1 is welded with a No. 1 clamping seat 34, and the other side of the cylinder head 1 is welded with a No. 2 clamping seat 35, and the inside of the reserved groove of the No. 2 clamping seat 35 is inserted with a No. 1 clamping block 36, and the inside of the reserved groove of the No. 1 clamping block 34 is inserted with a No. 2 clamping block 37, and one side of the two groups of connecting plates 33 is fixedly installed with a connecting frame 38, the inner walls of the multiple groups of semicircular seats 311 are in contact with the outer wall of the second layer of cooling pipe 233, and one side of the two groups of connecting plates 33 are respectively in contact with the two sides of the cylinder head 1, one end of the No. 1 clamping block 36 is fixed to one side of one group of connecting plates 33, and one end of the No. 2 clamping block 37 is fixed to one side of the other group of connecting plates 33 The two sets of connecting frames 38 are fixed to each other, and one end of the two sets of connecting frames 38 is welded with a limiting block 39. The clamping assembly 32 includes two sets of square seats 321. The inside of the two sets of square seats 321 is provided with a push plate 322 that slides up and down. The top of the inner part of the two sets of square seats 321 is fixedly installed with a supporting spring 323. Both sides of the two sets of square seats 321 are penetrated with a limiting groove 324. One end of the two sets of square seats 321 is fixed to one end of the cylinder cover 1. The lower ends of the two sets of supporting springs 323 are respectively fixed to the upper ends of the two sets of push plates 322. The two sets of limiting blocks 39 are respectively inserted into the inside of the two sets of limiting grooves 324. The lower ends of the two sets of push plates 322 are respectively in contact with the upper ends of the two sets of limiting blocks 39. The lower ends of the two sets of square seats 321 are penetrated with a long hole, and the protrusions at the lower ends of the two sets of limiting blocks 39 are respectively inserted into the inside of the two sets of long holes.

[0024] In this embodiment, first insert the second clamping block 37 into the first clamping seat 34, and insert the first clamping block 36 into the second clamping seat 35, and then operate the two sets of connecting frames 38 one by one, so that the two sets of connecting frames 38 drive the two sets of limiting blocks 39 to move, and the two sets of limiting blocks 39 are respectively inserted into the inside of the two sets of limiting grooves 324. At this time, the inner walls of the multiple sets of semicircular seats 311 are in contact with the outer wall of the second layer of cooling pipe 233, and then cooperate with the two sets of connecting plates 33, so that the multiple sets of semicircular seats 311 can support the second layer of cooling pipe 233, which can improve the firmness of the second layer of cooling pipe 233 and the outer wall of the cylinder head 1. Under the elastic force of the two groups of support springs 323, the two groups of support springs 323 drive the two groups of lower push plates 322 to move, so that the two groups of lower push plates 322 slide downward inside the two groups of square seats 321 respectively. At the same time, the two groups of lower push plates 322 push the two groups of limit blocks 39 to move, so that the protruding parts of the two groups of limit blocks 39 are respectively inserted into the long holes of the two groups of square seats 321, and then the two groups of limit blocks 39 can be fixed inside the two groups of square seats 321 respectively, so that the two groups of limit blocks 39 can be fixed to improve the fixing stability of the two groups of connecting plates 33; By penetrating one end of the two sets of connecting plates 33 with a semicircular hole design, the installation of the cylinder head 1 will not be affected, ensuring that the cylinder head 1 can be normally connected to the cylinder body.

[0025] Embodiment 3: According to Figure 1 , Figure 2 , Fig.14 and Fig.15 As shown, the anti-diffusion mechanism 4 includes a flexible nano-insulation board 42, support boards 41 are inserted into the upper end openings of multiple groups of vertical blocks 31, flexible nano-insulation boards 43 are fixedly installed on both sides of the flexible nano-insulation board 42, and flexible nano-insulation boards 3 44 are fixedly installed on both ends of the flexible nano-insulation board 42. The flexible nano-insulation board 42 is located above the cylinder head 1, and the upper ends of the multiple groups of support boards 41 are fixed to the lower side of the flexible nano-insulation board 42.

[0026] In this embodiment, a flexible nano heat insulation board 1 42, two groups of flexible nano heat insulation boards 2 43 and two groups of flexible nano heat insulation boards 3 44 are respectively arranged between the combustion chamber and other parts of the cylinder head 1, and the lower end of the flexible nano heat insulation board 1 42 is in contact with the outer wall of the first layer of cooling pipe 231, and the two groups of flexible nano heat insulation boards 2 43 and the two groups of flexible nano heat insulation boards 3 44 are in contact with the outer walls of the spiral cooling pipe 232 and the second layer of cooling pipe 233, which can not only prevent the heat from diffusing to the surroundings, but also quickly and evenly disperse the locally concentrated heat to a larger area, and then the first layer of cooling pipe 231, the second layer of cooling pipe 233 and the spiral cooling pipe 232 take away the heat, thereby improving the uniformity of temperature distribution inside the cylinder head 1, reducing the risk of knocking, and improving the overall thermal stability of the engine; Under the plug-in cooperation of the multiple groups of support boards 41 and the multiple groups of vertical blocks 31, it is convenient to pull out or insert the multiple groups of support boards 41 from the inside of the multiple groups of vertical blocks 31, and the multiple groups of support boards 41 and the multiple groups of vertical blocks 31 can be quickly disassembled and installed. At the same time, the multiple groups of support boards 41 can support the flexible nano thermal insulation board 1 42; The flexible nano thermal insulation board 1 42, two sets of flexible nano thermal insulation board 2 43, and two sets of flexible nano thermal insulation board 3 44 have good flexibility and bending properties and can adapt to installation surfaces of different shapes and angles, thereby improving the practicality of the flexible nano thermal insulation board 1 42, two sets of flexible nano thermal insulation board 2 43, and two sets of flexible nano thermal insulation board 3 44.

[0027] The use method and working principle of the device are as follows: the spiral cooling pipe 232 is sleeved on the outer wall of the cylinder body, the cylinder head 1 is installed on the cylinder body, the second layer of cooling pipe 233 is sleeved on the outer wall of the cylinder head 1, the mounting plate 21 is fixed to the outer wall of the cylinder head 1 through the fixing assembly 25, the water pump 22 is installed on the mounting plate 21, and then the transmission assembly 24 is connected to the transmission system of the engine, and then the components of the cooling assembly 23 are connected one by one, and the other end of the spiral cooling pipe 232 is connected to the coolant storage tank; Then, insert the No. 1 clamping block 36 into the No. 2 clamping seat 35 one by one, insert the No. 2 clamping block 37 into the No. 1 clamping seat 34, and then insert the two groups of limit blocks 39 into the two groups of limit grooves 324 respectively. Under the elastic force of the two groups of support springs 323, the two groups of support springs 323 drive the two groups of lower push plates 322 to move, so that the two groups of lower push plates 322 slide downward in the two groups of square seats 321 respectively. At the same time, the two groups of lower push plates 322 push the two groups of limit blocks 39 to move, so that the protruding parts of the two groups of limit blocks 39 are respectively inserted into the long holes of the two groups of square seats 321, and then the two groups of limit blocks 39 can be fixed in the two groups of square seats 321 respectively. At this time, the multiple groups of semicircular seats 311 can support the second layer of cooling pipes 233; Finally, when the engine is running at a high load and generates a large amount of heat, the speed of the water pump 22 increases accordingly, increasing the circulation volume of the coolant to ensure that the engine is fully cooled; when the engine is running at a low load or cold starting, the speed of the water pump 22 decreases to reduce the coolant flow rate. During this period, the water pump 22 transmits coolant to the interior of the first layer of cooling pipe 231 through the connecting pipe 234, and the coolant flows to the second layer of cooling pipe 233 through the No. 1 special-shaped pipe 235, and then flows into the interior of the spiral cooling pipe 232 through the No. 2 special-shaped pipe 236. Under the action of the two groups of U-shaped spoilers 238 and the triangular spoiler 237, the coolant can generate turbulence inside the first layer of cooling pipe 231, the second layer of cooling pipe 233 and the spiral cooling pipe 232, which can further improve the heat dissipation effect.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure of a cylinder head for a high-pressure fuel system engine, comprising a cylinder head (1), characterized in that: A cooling mechanism (2) is provided at the lower end of the cylinder head (1) to conduct heat generated by the cylinder head (1) and the cylinder body by means of water flow; a limiting mechanism (3) is provided on the outer side of the cylinder head (1) to limit a part of the structure of the cooling mechanism (2); and an anti-diffusion mechanism (4) is provided at the upper end of the limiting mechanism (3) to prevent the heat of the cooling mechanism (2) from diffusing outwards; The cooling mechanism (2) comprises a mounting plate (21) and a cooling assembly (23); a detachable water pump (22) is mounted on the upper end of the mounting plate (21); a transmission assembly (24) is mounted on the output end of the water pump (22); a fixing assembly (25) is inserted through one end of the mounting plate (21), and a partial structure of the fixing assembly (25) is fixed to the outer wall of the cylinder head (1); The cooling assembly (23) comprises a spiral cooling pipe (232), a layer of cooling pipe (231) is welded to the upper end of the cylinder head (1), a second layer of cooling pipe (233) is sleeved on the outer wall of the cylinder head (1), a connecting pipe (234) is fixedly mounted on one end of the first layer of cooling pipe (231), a No. 1 special-shaped pipe (235) is fixedly mounted on the other end of the first layer of cooling pipe (231), a No. 2 special-shaped pipe (236) is fixedly mounted on one end of the second layer of cooling pipe (233), a triangular spoiler (237) is fixedly mounted on the inner wall of the spiral cooling pipe (232), and a U-shaped spoiler (238) is fixedly mounted on the inner walls of both the first layer of cooling pipe (231) and the second layer of cooling pipe (233).

2. The structure of the engine cylinder head for a high-pressure fuel system according to claim 1 is characterized in that: The spiral cooling pipe (232) is located below the cylinder head (1), and the other end of the connecting pipe (234) is fixed to the water outlet end of the water pump (22).

3. The structure of the cylinder head for a high-pressure fuel system according to claim 1, characterized in that: The other end of the No. 1 special-shaped pipe (235) is connected to the other end of the second-layer cooling pipe (233), and the other end of the No. 2 special-shaped pipe (236) is connected to one end of the spiral cooling pipe (232).

4. The structure of the cylinder head for a high-pressure fuel system according to claim 1, characterized in that: The limiting mechanism (3) comprises two groups of connecting plates (33) and a clamping assembly (32), one side of the two groups of connecting plates (33) is welded with multiple groups of vertical blocks (31), the lower ends of the multiple groups of vertical blocks (31) are welded with semicircular seats (311), one side of the cylinder head (1) is welded with a No. 1 clamping seat (34), the other side of the cylinder head (1) is welded with a No. 2 clamping seat (35), the inside of the reserved groove of the No. 2 clamping seat (35) is inserted with a No. 1 clamping block (36), the inside of the reserved groove of the No. 1 clamping seat (34) is inserted with a No. 2 clamping block (37), one side of the two groups of connecting plates (33) is fixedly mounted with a connecting frame (38), and the inner walls of the multiple groups of semicircular seats (311) are in contact with the outer wall of the second layer of cooling pipe (233).

5. The structure of the cylinder head for a high-pressure fuel system according to claim 4 is characterized in that: One side of the two groups of connecting plates (33) are respectively in contact with two sides of the cylinder head (1), one end of the first clamping block (36) is fixed to one side of one group of connecting plates (33), and one end of the second clamping block (37) is fixed to one side of the other group of connecting plates (33).

6. The structure of the cylinder head for a high-pressure fuel system according to claim 4, characterized in that: A limiting block (39) is welded to one end of the two groups of connecting frames (38), and the clamping assembly (32) comprises two groups of square seats (321). Push plates (322) are provided inside the two groups of square seats (321) for sliding up and down. Support springs (323) are fixedly installed at the top ends of the two groups of square seats (321), and limiting grooves (324) are provided on both sides of the two groups of square seats (321).

7. The structure of the cylinder head for a high-pressure fuel system according to claim 6, characterized in that: One end of the two groups of square seats (321) is fixed to one end of the cylinder cover (1), the lower ends of the two groups of support springs (323) are respectively fixed to the upper ends of the two groups of push-down plates (322), and the two groups of limit blocks (39) are respectively inserted into the interior of the two groups of limit grooves (324).

8. The structure of the cylinder head for a high-pressure fuel system according to claim 7, characterized in that: The lower ends of the two groups of push-down plates (322) are in contact with the upper ends of the two groups of limit blocks (39) respectively, and the lower ends of the two groups of square seats (321) are penetrated by long holes, and the protruding parts of the lower ends of the two groups of limit blocks (39) are respectively inserted into the inside of the two groups of long holes.

9. The structure of the cylinder head for a high-pressure fuel system according to claim 4, characterized in that: The anti-diffusion mechanism (4) comprises a first flexible nano-insulation board (42), a plurality of groups of upper end openings of the vertical blocks (31) are each inserted with a support plate (41), both sides of the first flexible nano-insulation board (42) are each fixedly mounted with a second flexible nano-insulation board (43), and both ends of the first flexible nano-insulation board (42) are each fixedly mounted with a third flexible nano-insulation board (44).

10. The structure of the cylinder head for a high-pressure fuel system engine according to claim 9, characterized in that: The flexible nano heat insulation board 1 (42) is located above the cylinder head (1), and the upper ends of the plurality of groups of support plates (41) are fixed to the lower side of the flexible nano heat insulation board 1 (42).

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