Diesel engine cylinder head water jacket

Abstract

The invention discloses a diesel engine cylinder head water jacket, which relates to the technical field of engine cylinder heads, and comprises a water jacket body with multiple cavity structures, wherein the multiple water jacket bodies are not interconnected, and the water jacket body is divided into an upper water jacket and a lower water jacket by a partition, wherein a water outlet is arranged at the top of the upper water jacket, and a water inlet is arranged at the bottom of the lower water jacket, and an injector water jacket and an exhaust seat ring water jacket are arranged in the middle of the water jacket body, and an intake seat ring groove is arranged on the side of the water jacket body to half surround the intake seat ring. The invention has a simple structure, and the coolant flows through each water jacket body respectively, so that the cylinder head is cooled sufficiently and evenly, and the independent water jacket body simplifies the water jacket structure, is conducive to the compact cylinder head arrangement, and is convenient for the processing and preparation of the water jacket sand core.

Description

Technical Field

[0001] The invention relates to the technical field of engine cylinder heads, in particular to a diesel engine cylinder head water jacket. Background Art

[0002] As one of the most critical parts of the engine, the reliability of the cylinder head is closely related to the casting process and cooling effect. A water jacket is set in the cylinder head to cool the heat generated in the combustion chamber and other mechanical operation parts of the engine to prevent the engine from overheating and keep the engine at a suitable temperature to achieve the best thermal efficiency. The traditional water jacket is an integral part of the cylinder head and has a complex structure. For multi-cylinder engines, the integral water jacket casting process is complicated, the sand core is inconvenient to process and prepare, and it is easy to produce defects, which seriously affects the production cost and reliability of the cylinder head. Summary of the invention

[0003] The present invention aims to solve the above technical problems existing in the prior art and provides a diesel engine cylinder head water jacket, which solves the problems of complex cylinder head water jacket structure and inconvenient processing and preparation of water jacket sand core.

[0004] In order to solve this technical problem, the present invention provides a diesel engine cylinder head water jacket, the water jacket is located in the diesel engine cylinder head, and includes a plurality of water jacket bodies, characterized in that the plurality of water jacket bodies are arranged in one-to-one correspondence with the cylinders, and the plurality of water jacket bodies are not connected to each other; the water jacket body is a cavity structure, including an upper water jacket and a lower water jacket, the bottom of the upper water jacket is connected to the top of the lower water jacket, and a partition is arranged between the upper water jacket and the lower water jacket; the top of the upper water jacket is provided with a water outlet; the bottom of the lower water jacket is provided with a water inlet; the middle of the water jacket body is provided with an injector water jacket and an exhaust seat ring water jacket, and the side of the water jacket body is provided with an intake seat ring groove.

[0005] Furthermore, the water inlet includes a main water inlet and a secondary water inlet arranged on opposite sides, the main water inlet is located near the exhaust seat ring, and the secondary water inlet is located near the intake seat ring.

[0006] Furthermore, the water outlet is arranged at the highest position on the top of the upper water jacket.

[0007] Furthermore, a drainage groove is provided on the side of the water jacket body.

[0008] Furthermore, a first channel is provided between the intake seat ring groove and the exhaust seat ring water jacket.

[0009] Furthermore, a second channel is provided between the injector water jacket and the exhaust seat ring water jacket.

[0010] Furthermore, a third channel is provided between the intake seat ring groove and the injector water jacket.

[0011] The present invention has the following beneficial effects:

[0012] 1. Multiple water jacket bodies are arranged to correspond to the cylinders one by one. The multiple water jacket bodies are not interconnected. The coolant flows through each water jacket body respectively, so that the cylinder head is cooled sufficiently and relatively evenly. The independent and identical water jacket bodies are conducive to simplifying the water jacket structure and facilitating the processing and preparation of the water jacket sand core.

[0013] 2. The intake seat ring water jacket is cancelled, and an intake seat ring groove is set to half surround the intake seat ring, making the water jacket structure more compact, which is conducive to compact cylinder head layout.

[0014] 3. Set up the main water inlet and secondary water inlet, and arrange them in different areas, so that a large amount of coolant can be used to cool the high-temperature area in a targeted manner, improve the utilization rate of the coolant, and improve the cooling efficiency.

[0015] 4. A drainage groove is set to guide the coolant from the main water inlet to flow to the exhaust seat ring water jacket, ensuring the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 yes Figure 1 A-direction view;

[0019] Figure 3 It is a schematic diagram of the structure of the present invention in use state.

[0020] In the figure, 1, water jacket body; 11, upper water jacket; 111, water outlet; 12, lower water jacket; 121, water inlet; 1211, main water inlet; 1212, secondary water inlet; 13, partition; 14, injector water jacket; 15, exhaust seat ring water jacket; 16, intake seat ring groove; 17, drainage groove; 18, first channel; 19, second channel; 20, third channel. DETAILED DESCRIPTION

[0021] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0022] like Figure 1-2As shown, the present invention provides a diesel engine cylinder head water jacket, which is located in the diesel engine cylinder head and includes a plurality of water jacket bodies 1, which are arranged one by one with the cylinders, and the plurality of water jacket bodies 1 are not connected to each other; the water jacket body 1 is a cavity structure, including an upper water jacket 11 and a lower water jacket 12, the bottom of the upper water jacket 11 is connected to the top of the lower water jacket 12, and a partition 13 is arranged between the upper water jacket 11 and the lower water jacket 12; a water outlet 111 is arranged at the top of the upper water jacket 11; a water inlet 121 is arranged at the bottom of the lower water jacket 12; an injector water jacket 14 and an exhaust seat ring water jacket 15 are arranged in the middle of the water jacket body 1, and an intake seat ring groove 16 is arranged on the side of the water jacket body 1.

[0023] The water jacket body 1 is divided into an upper water jacket 11 and a lower water jacket 12 by a partition 13. The bottom of the upper water jacket 11 is connected to the cavity of the lower water jacket 12. The temperature of the lower water jacket 12 is higher than that of the upper water jacket 11. The coolant flows into the lower water jacket 12 from the water inlet 121. The partition 13 can make the coolant fully cool the lower water jacket 12 and then flow into the upper water jacket 11 for cooling, and finally flow out from the water outlet 111, thereby improving the utilization rate of the coolant.

[0024] The exhaust seat ring is the high temperature area of ​​the cylinder head. The exhaust seat ring water jacket 15 is set to surround the exhaust seat ring, which can quickly cool it. The fuel injector is next to the exhaust seat ring, so the fuel injector water jacket 14 is set to surround the fuel injector to prevent high temperature from affecting the action of the fuel injector needle valve and affecting normal fuel injection and materialization. The temperature of the intake seat ring is lower than that of the exhaust seat ring, so the intake seat ring groove 16 is set to half surround the intake seat ring, reducing the volume of the coolant flowing through the water jacket, making the water jacket structure more compact, which is conducive to the compact cylinder head layout, and can make the coolant concentrate on cooling the high temperature exhaust seat ring, preventing excessive cold and heat differences in the water jacket, and improving the cooling efficiency of the coolant.

[0025] like Figure 1 As shown, the water outlet 111 is arranged at the highest position on the top of the upper water jacket 11, and is arranged on the opposite side of the secondary water inlet 1212, so that the coolant can fully cool each area of ​​the water jacket body 1, and at the same time, the gas mixed in the coolant is discharged from the water outlet 111 along with the coolant, preventing the gas from accumulating in the water jacket and affecting the heat exchange between the coolant and the water jacket.

[0026] like Figure 2 As shown, the water inlet 121 includes a main water inlet 1211 and a secondary water inlet 1212 arranged on opposite sides. The main water inlet 1211 is located near the exhaust seat ring, and the secondary water inlet 1212 is located near the intake seat ring. The main water inlet 1211 and the secondary water inlet 1212 are arranged in different areas so that the coolant can be concentratedly cooled in the high-temperature area in a targeted manner, thereby improving the utilization rate of the coolant and the cooling efficiency. The coolant of the main water inlet 1211 is mainly used for cooling the exhaust seat ring water jacket 15, and the coolant of the secondary water inlet 1212 is mainly used for cooling the intake seat ring and the outer side of the exhaust seat ring.

[0027] A drainage groove 17 is arranged on the side of the water jacket body 1, and the drainage groove 17 is on the same side as the intake seat ring groove 16. The drainage groove 17 is close to the main water inlet 1211, and has a throttling effect on the coolant of the main water inlet 1211. It can guide the coolant of the main water inlet 1211 to flow to the exhaust seat ring water jacket 15, thereby ensuring the cooling effect and increasing the heat dissipation area of ​​the water jacket body 1.

[0028] A first channel 18 is provided between the intake seat ring groove 16 and the exhaust seat ring water jacket 15, a second channel 19 is provided between the injector water jacket 14 and the exhaust seat ring water jacket 15, and a third channel 20 is provided between the intake seat ring groove 16 and the injector water jacket 14; the coolant guided by the drainage groove 17 flows to the exhaust seat ring water jacket 15, when the coolant enters the first channel 18, the flow rate increases, which can effectively reduce the temperature between the exhaust seat ring water jacket 15 and the intake seat ring groove 16, and prevent the high temperature of the exhaust seat ring water jacket 15 from affecting the action of the intake seat ring; the coolant flows into the second channel 19 and the third channel 20 through the first channel 18, when the coolant flows through the second channel 19, it can effectively reduce the temperature between the exhaust seat ring water jacket 15 and the injector water jacket 14, and prevent the high temperature of the exhaust seat ring water jacket 15 from affecting the action of the injector, and when the coolant flows through the third channel 20, it can further reduce the temperature of the intake seat ring groove 16 and the injector water jacket 14.

[0029] like Figure 3 As shown, multiple water jacket bodies 1 are arranged in the cylinder head in a one-to-one correspondence with the cylinders. The multiple water jacket bodies 1 are not connected to each other. The coolant flows through each water jacket body 1 respectively, so that the cylinder head is cooled sufficiently and relatively evenly. The independent and identical water jacket bodies 1 are conducive to compact cylinder head layout, simplified water jacket structure, and convenient for the processing and preparation of water jacket sand cores.

[0030] The above is a preferred embodiment of the present invention, and the description of the specific embodiment is only used to better understand the concept of the present invention. For those skilled in the art, several improvements or equivalent replacements can be made according to the principles of the present invention, and these improvements or equivalent replacements are also considered to fall within the protection scope of the present invention.

Claims

1. A diesel engine cylinder head water jacket, the water jacket is located in the diesel engine cylinder head, comprising a plurality of water jacket bodies (1), characterized in that: A plurality of water jacket bodies (1) are arranged in one-to-one correspondence with the cylinders, and the plurality of water jacket bodies (1) are not interconnected; the water jacket body (1) is a hollow structure, comprising an upper water jacket (11) and a lower water jacket (12); the bottom of the upper water jacket (11) is connected to the top of the lower water jacket (12), and a partition (13) is arranged between the upper water jacket (11) and the lower water jacket (12); the top of the upper water jacket (11) is provided with a water outlet (111); the bottom of the lower water jacket (12) is provided with a water inlet (121); the middle of the water jacket body (1) is provided with an injector water jacket (14) and an exhaust seat ring water jacket (15), and the side of the water jacket body (1) is provided with an intake seat ring groove (16); A drainage groove (17) is provided on the side of the water jacket body (1); A first channel (18) is provided between the intake seat ring groove (16) and the exhaust seat ring water jacket (15); A second channel (19) is provided between the injector water jacket (14) and the exhaust seat ring water jacket (15); A third channel (20) is provided between the intake seat ring groove (16) and the injector water jacket (14).

2. A diesel engine cylinder head water jacket as claimed in claim 1, characterized in that: The water inlet (121) comprises a main water inlet (1211) and a secondary water inlet (1212) arranged on opposite sides, the main water inlet (1211) being located near the exhaust seat ring, and the secondary water inlet (1212) being located near the intake seat ring.

3. A diesel engine cylinder head water jacket as claimed in claim 1, characterized in that: The water outlet (111) is arranged at the highest position on the top of the upper water jacket (11).

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