A downcomer sleeve and double-ply water jacket

Abstract

The utility model discloses a kind of lower water jacket and double-layer water jacket, upper water jacket is installed above lower water jacket, and upper water jacket has upper water flow passage, lower water jacket has lower water flow passage, total water inlet area is provided with total water inlet shunt groove, lower water flow passage of lower water jacket is additionally provided with throttling water channel, the top of upper water jacket is additionally provided with the opening of a plurality of water channeling mouths, the flowing direction of lower water flow passage is parallel to the direction of exhaust gas transverse flow, the flowing direction of upper water flow passage is vertical to the direction of longitudinal flow of exhaust gas.The beneficial effects of the present application are: the lower water jacket is the main cooling jacket of the cylinder head, and the water flow direction is parallel to the direction of exhaust gas transverse flow, with short flow process and small water resistance, which can improve the heat dissipation efficiency of the cylinder head.

Description

Technical Field

[0001] This utility model relates to water jacket structures, and in particular to a lower water jacket and a double-layer water jacket. Background Technology

[0002] Currently, most cast aluminum cylinder heads for diesel engines have only one layer of cooling water jacket, while a few have two layers. The water flow direction of the cylinder head is consistent, with no horizontal flow parallel to the intake and exhaust directions, but rather a vertical flow perpendicular to the intake and exhaust directions. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lower water jacket and a double-layer water jacket.

[0004] The purpose of this utility model is achieved through the following technical solution: a water jacket, the top of which has a water flow channel, the right side of which is the EGR side, the water flow channel is connected to the cavity of the EGR side, the front side of the water jacket has a total water inlet area, a total water inlet diversion channel is provided in the total water inlet area, the total water inlet diversion channel is close to the EGR side and is connected to the water flow channel, the rear end of the water jacket is provided with an outlet near the EGR side, and the water flow channel of the water jacket is also provided with a throttling channel, the flow direction of the water flow channel is parallel to the air intake and exhaust direction and flows laterally.

[0005] Optionally, the main inlet diversion channel has a Y-shaped structure on the front and rear projection surfaces.

[0006] A double-layer water jacket includes a lower water jacket and an upper water jacket. The upper water jacket is installed above the lower water jacket and has an upper water flow channel. The right side of the upper water jacket is also an EGR side. The upper water flow channel is connected to the cavity of the corresponding EGR side. The throttling channel of the lower water jacket is connected to the upper water flow channel. The top of the upper water jacket is also provided with several water inlets, which are connected to the upper water flow channel. The rear end of the EGR side of the upper water jacket is also provided with an outlet docking piece corresponding to the outlet. The right side of the EGR side of the upper water jacket is also provided with a main outlet, which is connected to the cavity of the EGR side. The flow direction of the upper water flow channel is longitudinal flow perpendicular to the inlet and outlet direction.

[0007] Optionally, the front sides of the upper and lower water jackets form the exhaust side, and the rear sides of the upper and lower water jackets form the intake side.

[0008] Optionally, the upper water jacket is also provided with an exhaust port, which is connected to the inner cavity of the upper water jacket and is located near the exhaust side of the upper water jacket.

[0009] Optionally, the vent is located at the highest point on the vent side of the upper water jacket.

[0010] Optionally, the rear end of the upper water jacket is provided with a valve corresponding to the number of cylinders, and a water inlet is provided between two adjacent valves.

[0011] Optionally, the number of cylinders is four.

[0012] Optionally, a conformal connection section is also provided between the upper water jacket and the EGR side.

[0013] Optionally, the main inlet diversion channel has a Y-shaped structure on the front and rear projection surfaces.

[0014] This invention has the following advantages: The two water jackets of this invention have inconsistent water flow directions. The lower water jacket is the main cooling water jacket of the cylinder head, and its water flow direction is transverse, parallel to the intake and exhaust directions. This results in a short flow path, low water resistance, and improved heat dissipation efficiency of the cylinder head. At the same time, the cooling water of each cylinder flows in parallel, ensuring consistent cooling of each cylinder in the cylinder head and avoiding excessive thermal stress caused by uneven cooling. The upper water jacket has a longitudinal flow direction perpendicular to the intake and exhaust directions, which is more conducive to the timely removal of air bubbles in the cooling water. Therefore, this double-layer water jacket is beneficial to improving the cooling efficiency of the cylinder head and enhancing the reliability and lifespan of the cylinder head. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 Schematic diagram of the lower water jacket structure Figure 1 ; Figure 3 Schematic diagram of the lower water jacket structure Figure 2 ; Figure 4 Schematic diagram of the upper water jacket structure Figure 1 ; Figure 5 Schematic diagram of the upper water jacket structure Figure 2 ; In the diagram, 1-upper water jacket, 2-lower water jacket, 3-EGR side, 4-intake side, 5-exhaust side, 6-total water inlet area, 7-outlet, 8-lower water flow channel, 9-throttling water channel, 10-outlet connector, 11-total outlet, 12-total inlet diversion channel, 13-water leakage port, 14-exhaust port. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1As shown, a double-layer water jacket includes a lower water jacket 2 and an upper water jacket 1. The upper water jacket 1 is installed above the lower water jacket 2 and has an upper water flow channel. In this embodiment, a lower water flow channel 8 is provided at the top of the lower water jacket 2. The right side of the lower water jacket 2 is the EGR side 3. The lower water flow channel 8 communicates with the cavity of the EGR side 3. The front side of the lower water jacket 2 has a total water inlet area 6. A total water inlet diversion channel 12 is provided at the total water inlet area 6. The total water inlet diversion channel 12 is close to the EGR side 3 and communicates with the lower water flow channel 8. An outlet 7 is provided at the rear end of the lower water jacket 2 near the EGR side 3. A throttling channel 9 is also provided on the lower water flow channel 8 of the lower water jacket 2. The flow direction is parallel to the intake and exhaust direction and flows laterally. The main water inlet diversion channel 12 has a Y-shaped structure on the front and rear projection planes. The cooling water is first divided into two paths from the main water inlet area 6. A small part of the water flows to the right to the EGR side 3, and most of the water flows to the left longitudinally into the area below the cylinder head exhaust passage. At the same time, each cylinder flows parallel from the exhaust side 5 to the intake side 4. This water flow direction makes the flow path of the cooling water through the cylinder head heat-prone area short and the flow resistance small. It can quickly and evenly remove the excess heat of each cylinder in the cylinder head. The cooling water of each cylinder converges below the intake pipe and then flows to the outlet 7. In this embodiment, in order to achieve the above water flow direction, a diversion channel structure is designed at the main water inlet, that is, the main water inlet diversion channel 12 is opened at the main water inlet area 6.

[0023] In this embodiment, the right side of the upper water jacket 1 is also the EGR side 3. The upper water flow channel is connected to the cavity of the corresponding EGR side 3. The throttling water channel 9 of the lower water jacket 2 is connected to the upper water flow channel. The diversion channel connecting the upper and lower water jackets 2 is the throttling water channel 9 of the upper water jacket through which the cooling water of the lower water jacket flows to the upper water jacket. These throttling water channels 9 can effectively guide the water flow according to the design flow direction requirements. At the same time, these throttling water channels 9 are both the positioning support structure of the upper and lower water jackets and the sand outlet after the cylinder head is cast.

[0024] In this embodiment, the top of the upper water jacket 1 is also provided with a plurality of water inlets 13, which are connected to the upper water flow channel. The rear end of the ECR side of the upper water jacket 1 is also provided with an outlet docking part 10 corresponding to the outlet 7. The right side of the EGR side 3 of the upper water jacket 1 is also provided with a main outlet 11, which is connected to the cavity of the EGR side 3. The flow direction of the upper water flow channel is longitudinal flow perpendicular to the inlet and outlet directions. Due to the restriction of the air inlet pipe, the upper water jacket 1 cannot allow cooling Water flows parallel from the exhaust side 5 to the intake side 4 and then converges at the outlet 7. Cooling water can only flow longitudinally from the left end of the water jacket to the right end of the water jacket at the main outlet 11, perpendicular to the intake and exhaust directions. This ensures smooth longitudinal flow of cooling water in the water jacket above the exhaust pipe. The water flow direction of the upper water jacket 1 is shown by the arrow in the figure. Considering the feasibility of the sand casting process for the water jacket, the upper water jacket 1 must ensure the smooth flow of cooling water and the successful removal of air bubbles from the cooling water. Therefore, in both cylinders... A water jacket connecting port 13 is designed on the intake side 4. In this embodiment, the rear end of the upper water jacket 1 is provided with a valve corresponding to the number of cylinders, and a water outlet 13 is provided between two adjacent valves. Furthermore, there are four cylinders. These three exhaust structures ensure that the intake side 4 of the upper water jacket can be connected to allow the cooling water to flow longitudinally towards the main outlet 11. At the same time, it also serves as the core support structure for the upper and lower water jackets 2 and the sand outlet after the cylinder head is cast. To ensure reliable exhaust, an exhaust port is also provided on the upper water jacket 1. The exhaust port 14 is connected to the inner cavity of the upper water jacket 1, and the exhaust port 14 is close to the exhaust side 5 of the upper water jacket 1. The exhaust port 14 is located at the highest point of the exhaust side 5, and also serves as the sand outlet after the cylinder head is cast. The connection structure between the EGR side 3 water jacket and the main water jacket is designed as a two-section connection, that is, there is also a conformal connection section between the upper water jacket 1 and the EGR side 3. Therefore, it ensures that the flow cross section of the water jacket is as large as possible to reduce water resistance, while also ensuring the casting strength of the overall water jacket core.

[0025] In this embodiment, the flow direction of the lower water flow channel 88 is parallel to the intake and exhaust direction, flowing laterally. The flow path is short and the water resistance is small, which can improve the heat dissipation efficiency of the cylinder head. At the same time, the cooling water of each cylinder flows in parallel, ensuring the consistency of cooling of each cylinder in the cylinder head and avoiding excessive thermal stress caused by uneven cooling of the cylinder head. The flow direction of the upper water flow channel is perpendicular to the intake and exhaust direction, flowing longitudinally, which is more conducive to the timely removal of air bubbles in the cooling water. Therefore, this double-layer water jacket is beneficial to improving the cooling efficiency of the cylinder head and enhancing the reliability of the cylinder head life.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sewer jacket, characterized in that: The top of the lower water jacket is provided with a water flow channel. The right side of the lower water jacket is the EGR side. The water flow channel is connected to the cavity on the EGR side. The front side of the lower water jacket has a total water inlet area. A total water inlet diversion channel is provided in the total water inlet area. The total water inlet diversion channel is close to the EGR side and is connected to the water flow channel. An outlet is provided on the rear end of the lower water jacket near the EGR side. A throttling channel is also provided on the water flow channel of the lower water jacket. The flow direction of the water flow channel is parallel to the air intake and exhaust direction and flows laterally.

2. A downcomer sleeve as set forth in claim 1 characterized in that: The main water inlet diversion channel has a Y-shaped structure on the front and rear projection surfaces.

3. A double-walled jacket characterized by: The system includes a lower water jacket as described in claim 1 or 2, and an upper water jacket. The upper water jacket is installed above the lower water jacket and has an upper water flow channel. The right side of the upper water jacket is also an EGR side. The upper water flow channel is connected to the cavity of the corresponding EGR side. The throttling channel of the lower water jacket is connected to the upper water flow channel. The top of the upper water jacket is also provided with a plurality of water inlets, which are connected to the upper water flow channel. The rear end of the EGR side of the upper water jacket is also provided with an outlet connector corresponding to the outlet. The right side of the EGR side of the upper water jacket is also provided with a main outlet, which is connected to the cavity of the EGR side. The flow direction of the upper water flow channel is longitudinal flow perpendicular to the inlet and outlet directions.

4. A double-walled jacket according to claim 3, characterized in that: The front sides of the upper and lower water jackets form the exhaust side, and the rear sides of the upper and lower water jackets form the intake side.

5. A double-walled jacket according to claim 4, characterized in that: The upper water jacket is also provided with an exhaust port, which is connected to the inner cavity of the upper water jacket and is located near the exhaust side of the upper water jacket.

6. A double-walled jacket according to claim 5, characterized in that: The vent is located at the highest point on the vent side of the upper water jacket.

7. A double-walled jacket according to claim 6, characterized in that: The rear end of the upper water jacket is provided with a valve corresponding to the number of cylinders, and the water inlet is provided between two adjacent valves.

8. A double-walled jacket according to claim 7, characterized in that: The number of cylinders is four.

9. A double-walled jacket according to claim 8, characterized in that: A conformal connection section is also provided between the upper water jacket and the EGR side.

10. A double-walled jacket according to claim 9, characterized in that: The main water inlet diversion channel has a Y-shaped structure on the front and rear projection surfaces.

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