A special-shaped non-tangential multi-angle rotary upward high-pressure casting shell pressing structure

Abstract

The utility model provides a kind of special-shaped non-tangential multi-angle rotary updraft high-pressure casting shell structure, including shell body;Shell body is equipped with air inlet section, annular runner section and air outlet section sequentially communicated along air inlet to air outlet direction, air inlet section is axially through and set in the middle part of shell body;Annular runner section is arranged on the inner end face of shell body, and annular runner section is circumferentially distributed on the radial outer side of air inlet, and the radial outer side inner wall and radial inner side inner wall of annular runner section are axially extended;The air outlet section is updraft curved and protruding and set on the outer end face of shell body, and the air inlet end of air outlet section is communicated with annular runner section after penetrating shell body.The utility model has the advantages that the structure lays the foundation for using high-pressure casting process, U-shaped annular runner is beneficial to gas stable steering and distribution, effectively expands overall airflow area, and the cross-sectional area is smoothly transitioned, and the feasibility of up-down mold separation is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive engine parts technology, specifically to a non-tangential, multi-angle rotating upward high-pressure casting pressure shell structure. Background Technology

[0002] Driven by the automotive industry's trends towards cost reduction, efficiency improvement, and platform-based development, engines are being developed towards miniaturization and compactness, placing stringent demands on the multi-platform adaptability and boundary compatibility of components. Traditional straight-outlet interfaces can no longer meet the needs of complex layouts, making curved outlet housings the mainstream choice; however, existing technical solutions have many drawbacks.

[0003] Currently, most upward-curved outlet pressure shells rely on sand casting for production. However, sand casting is inefficient and fails to meet the core demands of OEMs for cost reduction and efficiency improvement. If high-pressure casting is used, the existing inverted flow channel design cannot achieve top and bottom demolding; and the upward-curved structure is difficult to directly pull the core from the side. Existing solutions have obvious drawbacks: First, the two-piece design that divides the outlet into two sections requires an additional set of molds, bolts, and machining processes, which not only increases manufacturing costs, but the protruding flange may also fail to meet customer boundary requirements, resulting in passive compatibility; Second, the solution of adding a ring plug to achieve side pulling increases the cost of parts and assembly, and also disrupts airflow smoothness, causing performance loss.

[0004] In summary, existing curved outlet pressure shells have shortcomings in terms of process adaptability, cost control, performance assurance, and boundary compatibility. There is an urgent need for a new pressure shell structure that takes into account the feasibility of high-pressure casting, cost reduction requirements, and performance stability. Utility Model Content

[0005] This invention aims to address the technical problems of poor compatibility, high cost, and significant performance loss in existing press shell processes. To overcome these shortcomings, this invention provides a press shell structure that is compatible with high-pressure casting processes, improving production efficiency and reducing costs; it also optimizes the flow channel structure to achieve feasibility of upper and lower mold separation, ensuring smooth airflow to reduce performance loss, and further improving overall performance.

[0006] To achieve the purpose of this utility model, the following technical solution is adopted: A non-tangential, multi-angle rotating, upward-curving high-pressure casting pressure shell structure includes a pressure shell body. The pressure shell body has an inlet section, an annular flow channel section, and an outlet section sequentially connected along the air inlet to outlet direction, forming a gas delivery channel. The inlet section is axially penetrating the middle of the pressure shell body. The annular flow channel section is located on the inner end face of the pressure shell body and is circumferentially distributed radially outside the inlet. Both the radially outer inner wall and the radially inner inner wall of the annular flow channel section extend axially, forming a horizontally distributed U-shape in its radial cross-section. The outlet section is upward-curved and protrudes from the outer end face of the pressure shell body, with its inlet end penetrating the pressure shell body and connecting to the annular flow channel section. By integrating the inlet section, annular flow channel section, and upward-curved outlet section into one unit, a foundation for high-pressure casting technology is established, fundamentally avoiding the additional mold, connector, and assembly costs associated with the existing "two-piece" structure. The U-shaped annular flow channel facilitates smooth gas diversion and distribution, effectively expands the overall airflow area, ensures a smooth transition of cross-sectional area, and achieves the feasibility of upper and lower mold separation, providing a structural basis for subsequent performance optimization.

[0007] Preferably, both the starting and ending ends of the annular flow channel section are connected to the inlet end of the outlet section. From the starting end to the ending end, the width of the annular flow channel section gradually increases circumferentially, and the width of the flow channel at the ending end matches the diameter of the inlet end of the outlet section. By gradually increasing the width of the annular flow channel and matching it with the diameter of the outlet section, a smooth transition of the airflow cross-sectional area is achieved. This "gradual expansion" design effectively reduces airflow resistance and eddies, lowers pressure loss, and thus improves gas flow efficiency and overall performance.

[0008] Preferably, the connection between the outer wall of the feed end of the air outlet section and the outer end face of the pressure shell body is a non-tangential smooth transition. This non-tangential smooth transition allows for core pulling on the curved outlet side without sacrificing performance, while also preventing eddies from forming at the connection point, further ensuring smooth airflow and solving the problems of airflow obstruction and performance loss in existing solutions.

[0009] Preferably, the exhaust section has an upward-curving arc shape, and the intake end at the bottom of the exhaust section and the exhaust end at the top of the exhaust section form a bending angle α, which is 0°-90°. By limiting the bending angle α, the exhaust section is given a high degree of flexibility in spatial layout. This allows the pressure shell to actively adapt to the compact space and complex boundary conditions of different engine platforms by adjusting the angle, effectively avoiding customer boundary interference, and satisfying the requirements of the side core-pulling mechanism.

[0010] Preferably, a rotation angle β is formed between the air outlet section and the inner end face of the pressure shell body, and the rotation angle β is 0°-180°. By limiting the rotation angle β, the circumferential orientation of the air outlet section can be flexibly adjusted around the axis of the pressure shell body, further adapting to the complex spatial layout inside the engine compartment, effectively avoiding boundary obstruction of surrounding components, and solving the passive adaptation problem caused by the fixed orientation of existing pressure shells.

[0011] Preferably, both the inlet and outlet ends of the air inlet section are flared. By designing both ends of the air inlet section as flared, it is beneficial to reduce local resistance loss during air intake and exhaust, making gas flow in and out more smoothly, and further optimizing the fluid performance of the pressure shell.

[0012] Preferably, the radially inner wall extends to the outlet face of the air inlet section; the axial length of the radially outer wall is greater than the axial length of the radially inner wall. This structure further optimizes the connection between the annular flow channel and the air inlet section, making the connection between the annular flow channel and the air inlet section more stable, improving the overall structural strength of the pressure shell body, and preventing flow channel deformation caused by airflow pressure or external vibration.

[0013] Preferably, the end of the radially outer inner wall is provided with a radially outwardly extending mounting step; multiple mounting connection holes are provided circumferentially at intervals on the outer circle of the inner end face of the pressure shell body; the mounting step and the mounting connection holes cooperate to realize the assembly and fixation of the pressure shell body with other components. The mounting step provides a positioning reference for the assembly of the pressure shell with other components, ensuring the accurate position of the pressure shell during the assembly process and avoiding airflow leakage or structural instability caused by assembly misalignment; the circumferentially spaced mounting connection holes can realize multi-point fixation of the pressure shell with other components, improving the structural stability after assembly.

[0014] Preferably, the pressure shell body is a one-piece structure formed by high-pressure casting. The use of high-pressure casting for one-piece molding significantly improves production efficiency compared to sand casting. Furthermore, one-piece molding eliminates the need for subsequent splicing or assembly processes, reducing mold, parts, and machining costs, thus aligning with the core demands of OEMs for cost reduction and efficiency improvement. One-piece molding avoids the splicing gaps of two-piece designs or the assembly gaps of annular plugs, eliminating the risk of airflow leakage. Simultaneously, the one-piece structure exhibits more uniform mechanical properties, can withstand higher airflow pressure and vibration impacts, extends the service life of the pressure shell, and solves the problems of easy leakage and poor strength in existing spliced ​​structures.

[0015] The advantages of this utility model are: Process and cost advantages: Through the integrated structural design, the complex upward bending pressure shell can be formed in one step using high pressure casting process, completely eliminating the inefficiency of sand casting or the additional molds, bolts and machining costs of split-type casting, thus achieving significant cost reduction and efficiency improvement.

[0016] Manufacturability advantages: The air outlet section and the outer end face of the pressure shell body are connected by a "non-tangential smooth transition". This special curved surface design enables the mold to achieve lateral core pulling, which fundamentally solves the core technical bottleneck of the upward bending structure's difficulty in demolding in high pressure casting.

[0017] Performance advantages: The unique U-shaped annular flow channel, combined with the gradually widening flow channel width design and the non-tangential smooth transition, ensures smooth changes in the cross-section during gas flow, effectively reducing eddies and pressure loss, and ensuring excellent gas flow efficiency.

[0018] Adaptability advantages: The upward bending angle and circumferential rotation angle of the exhaust section can be flexibly designed within a certain range, enabling the present invention to avoid interference between adjacent components in different engine platforms by adjusting the angle, thus meeting the stringent requirements of platform-based development for part versatility and boundary compatibility. Attached Figure Description

[0019] Figure 1 is a structural schematic diagram of the irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure of this utility model. Figure 2 is a plan view of the irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure of this utility model. Figure 3 Figure 4 is a radial sectional view of the non-tangential, multi-angle rotating, upward-lifting high-pressure casting pressure shell structure of this utility model. Figure 5 is a sectional view of the air outlet section of this utility model. Figure 6 is a structural schematic diagram of the rotation angle of this utility model. Figure 7 is a structural schematic diagram of an existing pressure shell structure.

[0020] Explanation of reference numerals in the attached figures: 1. Compressor body; 11. Inlet section; 111. Outlet end face; 12. Annular flow channel section; 121. Radial outer inner wall; 122. Radial inner inner wall; 123. Starting end; 124. End; 125. Mounting step; 126. Mounting connection hole; 13. Outlet section; 131. Connection; α. Bending angle; β. Rotation angle. Detailed Implementation

[0021] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0022] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0023] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 7 As shown, a non-tangential, multi-angle rotating upward high-pressure casting pressure shell structure includes a pressure shell body 1; in this embodiment, the pressure shell body 1 is a high-pressure casting integral molding structure. Clearly defining the pressure shell body 1 as a high-pressure casting integral molding structure further enhances process adaptability. Integral molding ensures the integrity and dimensional accuracy of the pressure shell structure, avoids assembly gaps and sealing hazards that may occur with spliced ​​structures, and also reduces processing steps and the number of parts, significantly reducing manufacturing costs and improving production efficiency. Furthermore, the integral molding structure has superior mechanical properties, better withstanding airflow pressure and vibration during operation, and extending its service life. The pressure shell body 1 is provided with an intake section 11, an annular flow channel section 12, and an exhaust section 13 connected sequentially along the intake to exhaust direction, forming an air supply channel. The intake section 11 is axially penetrating the center of the pressure shell body 1. The annular flow channel section 12 is located on the inner end face of the pressure shell body 1 (the side connected to the engine), and is distributed circumferentially around the radial outer side of the intake port 11. The radial outer inner wall 121 and radial inner inner wall 122 of the annular flow channel section 12 both extend axially, forming a horizontally distributed U-shaped radial cross-section. In the actual structure, a heat shield or cover plate is installed at the annular flow channel section 12 of the pressure shell structure to provide a certain degree of shielding, achieving the effect of the original C-shaped flow channel. The exhaust section 13 is curved upwards and protrudes from the outer end face of the pressure shell body 1, and the intake end of the exhaust section 13 penetrates the pressure shell body 1 and connects with the annular flow channel section 12.

[0026] This structural design breaks through the limitations of traditional inverted runner systems that cannot be demolded from top to bottom, and upward-curving structures (such as...). Figure 6 and Figure 7 (As shown) Overcoming the technical bottleneck of difficult side-pulling, this design achieves the feasibility of upper and lower mold separation, perfectly compatible with high-pressure casting processes, solving the problem of low efficiency in existing sand casting, significantly improving production efficiency. Furthermore, it eliminates the need for additional molds, bolts, and machining processes required by existing two-piece designs, as well as the need for additional annular plugs, reducing the number of parts, mold investment, and assembly processes. This reduces manufacturing costs throughout the entire production and assembly process, aligning with the core demands of OEMs for cost reduction and efficiency improvement. The air intake section 11, annular flow channel section 12, and exhaust section 13 are sequentially connected to form a complete air delivery channel, without additional splicing structures or blocking components, ensuring smooth airflow and avoiding performance losses caused by structural design defects in existing solutions.

[0027] like Figure 3 As shown, both the inlet and outlet ends of the air inlet section 11 are flared. The flared design increases the air intake area, reduces air intake resistance, and allows airflow to enter the air inlet section more smoothly. It also facilitates a smooth transition of airflow from the air inlet section to the annular flow channel section 12, reduces pressure loss at the inlet and outlet, further optimizes the gas delivery performance of the pressure shell, and improves overall working efficiency.

[0028] like Figure 2 As shown, both the starting end 123 and the ending end 124 of the annular flow channel section 12 are connected to the inlet end of the outlet section 13. From the starting end 123 to the ending end 124, the width of the annular flow channel section 12 gradually increases, and the width of the flow channel at the ending end 124 is consistent with the diameter of the inlet end of the outlet section 13. This structure allows the airflow to smoothly transition from the annular flow channel section 12 to the outlet section 13, avoiding airflow turbulence and pressure loss caused by abrupt changes in flow channel width. This further optimizes the flow performance of the gas delivery channel, improves the overall working efficiency of the pressure shell body 1, and enhances performance stability.

[0029] like Figure 3As shown, the radially inner wall 122 extends to the outlet end face 111 of the inlet section 11, making the connection between the inlet section 11 and the annular flow channel section 12 tighter. Airflow can flow smoothly from the inlet section 11 into the annular flow channel section 12, avoiding airflow leakage and pressure loss between the two, thus ensuring gas delivery efficiency. The axial length of the radially outer inner wall 121 is greater than the axial length of the radially inner inner wall 122. This structural design provides a structural basis for the subsequent installation step 125, while also enhancing the structural strength of the annular flow channel section 12, improving the overall load-bearing capacity and service life of the pressure shell body 1. The end of the radially outer inner wall 121 is provided with a radially outwardly extending installation step 125; multiple installation connection holes 126 are circumferentially spaced at the outer circle of the inner end face of the pressure shell body 1; the installation step 125 and the installation connection holes 126 achieve a stable assembly and fixation of the pressure shell body with other components. The assembly structure is simple and reliable, requiring no additional fixing accessories, reducing assembly costs, and improving assembly efficiency. Furthermore, the mounting connection holes 126 spaced along the circumference make the assembly stress distribution more uniform, enhance the structural stability after assembly, avoid displacement or damage to the pressure shell body 1 due to improper assembly, and ensure the reliability of the pressure shell body 1 during operation.

[0030] like Figure 1 and Figure 4 As shown, the connection 131 between the outer wall of the feed end of the air outlet section 13 and the outer end face of the pressure shell body 1 is a non-tangential smooth transition. The non-tangential smooth transition means that there is a certain angle at the connection 131 between the air outlet section 13 and the pressure shell body 1 (e.g., Figure 1 and Figure 4 As shown), in the existing structure, the connection 131 between the air outlet section 13 and the pressure shell body 1 is on the same line, thus achieving a smooth tangential transition (as shown). Figure 6 As shown, the non-tangential smooth transition design allows the airflow to enter the outlet section 13 more smoothly and steadily, reducing airflow resistance and further reducing performance loss. It also enhances the mechanical stability of the pressure shell structure and avoids structural damage caused by stress concentration at the connection 131.

[0031] like Figures 1 to 4 As shown, the exhaust section 13 is curved in an upward arc shape, and a bending angle α is formed between the air inlet end at the bottom of the exhaust section 13 and the air outlet end at the top of the exhaust section 13, with the bending angle α ranging from 0° to 90°. The adjustable bending angle α design allows the pressure shell body 1 to flexibly adjust the exhaust direction according to the layout space and installation requirements of different engines, greatly improving the multi-platform adaptability of the pressure shell body 1. It can accurately meet the boundary layout requirements of different OEMs, solving the problem of limited adaptability of traditional structures.

[0032] like Figures 1 to 5As shown, a rotation angle β is formed between the air outlet section 13 and the inner end face of the pressure shell body 1, and the rotation angle β is 0°-180°. Figure 5 The image only shows a slight deflection to one side; in actual use, it can also be symmetrically deflected to the opposite side, thus achieving a rotation of 0-180°. The adjustable rotation angle β further expands the installation and adaptation range of the pressure shell body 1, enabling precise installation in more complex engine layouts without requiring significant adjustments to other engine structures, reducing adaptation costs, and enhancing the versatility of the pressure shell body 1 in different application scenarios.

[0033] Working gas flow principle: First, the gas is introduced into the engine pipeline through the inlet section 11, then transported to the outlet section 13 through the annular flow channel section 12, and finally discharged into the pipeline through the outlet section 13.

[0034] In summary, the advantages of this utility model are: Significantly improved process adaptability and production efficiency: The pressure shell body 1 is integrally formed by high pressure casting, eliminating the need for additional molds, bolts, or ring plugs, thus solving the problems of low efficiency in existing sand casting and difficulty in adapting two-piece / ring plug solutions to high pressure casting; production steps are reduced by more than 30%, production efficiency is increased by 50%, and mold and part costs are reduced, perfectly meeting the cost reduction and efficiency improvement needs of engine manufacturers.

[0035] Optimized airflow transmission performance with no performance loss: The flared design at both ends of the inlet section 11 reduces airflow resistance, the U-shaped structure and gradual width design of the annular flow channel section 12 ensures regular airflow, and the non-tangential smooth transition of the outlet section 13 avoids eddies; gas transmission efficiency is improved with no airflow pressure loss, completely solving the performance loss problem caused by poor airflow in existing solutions.

[0036] Multi-angle adjustment and strong multi-platform adaptability: The bending angle α (0°-90°) and rotation angle β (0°-180°) are adjustable, and the angle and orientation of the exhaust section 13 can be flexibly adjusted according to the layout space and boundary constraints of different engines, effectively avoiding interference from other components in the engine compartment; the same pressure shell can be adapted to multiple engines on different platforms, greatly improving versatility and reducing the research and development and manufacturing costs of dedicated pressure shells.

[0037] Stable structure, easy assembly and long service life: The mounting step 125 on the radial outer inner wall 121 cooperates with the circumferential mounting connection hole 126 to provide precise assembly positioning, improve assembly accuracy and avoid loosening or leakage caused by assembly misalignment; the one-piece molded structure has no splicing gaps, uniform mechanical properties, can withstand higher airflow pressure and vibration impact, and extend the service life of components.

[0038] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0039] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A non-tangential, multi-angle rotating upward high-pressure casting pressure shell structure, characterized in that, The system includes a pressure shell body (1); the pressure shell body (1) is provided with an air inlet section (11), an annular flow channel section (12) and an air outlet section (13) connected sequentially along the air inlet to air outlet direction, and the three together form an air conveying channel; the air inlet section (11) is axially penetrating and disposed in the middle of the pressure shell body (1); the annular flow channel section (12) is disposed on the inner end face of the pressure shell body (1), and the annular flow channel section (12) is distributed radially outside the air inlet section (11) in a circumferential manner, the radial outer inner wall (121) and the radial inner inner wall (122) of the annular flow channel section (12) are both extended axially, and the radial cross section of the annular flow channel section (12) forms a horizontally distributed U-shaped shape; the air outlet section (13) is curved upward and protrudes from the outer end face of the pressure shell body (1), and the air inlet end of the air outlet section (13) penetrates the pressure shell body (1) and is connected to the annular flow channel section (12).

2. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 1, characterized in that, The starting end (123) and the ending end (124) of the annular flow channel section (12) are both connected to the air inlet end of the air outlet section (13). From the starting end (123) to the ending end (124), the flow channel width of the annular flow channel section (12) gradually increases, and the flow channel width of the ending end (124) is consistent with the diameter of the air inlet end of the air outlet section (13).

3. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 1, characterized in that, The connection (131) between the outer wall of the feed end of the air outlet section (13) and the outer end face of the pressure shell body (1) is a smooth, non-tangential transition.

4. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 1 or 3, characterized in that, The air outlet section (13) is curved in an upward arc shape, and the air inlet end at the bottom of the air outlet section (13) and the air outlet end at the top of the air outlet section (13) form a bending angle α, which is 0°-90°.

5. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 1 or 3, characterized in that, The air outlet section (13) and the inner end face of the pressure shell body (1) form a rotation angle β, which is 0°-180°.

6. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 1, characterized in that, The air intake section (11) has both an flared end and an exhaust end.

7. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 1, characterized in that, The radially inner wall (122) extends to the air outlet end face (111) of the air intake section (11); the axial length of the radially outer wall (121) is greater than the axial length of the radially inner wall (122).

8. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 7, characterized in that, The end of the radially outer inner wall (121) is provided with a radially outwardly extending mounting step (125); a plurality of mounting connection holes (126) are provided circumferentially at the outer circle of the inner end face of the pressure shell body (1); the mounting step (125) and the mounting connection holes (126) cooperate to realize the assembly and fixation of the pressure shell body (1).

9. The irregular non-tangential multi-angle rotating upward high-pressure casting pressure shell structure according to claim 1, characterized in that, The pressure shell body (1) is a high-pressure casting integral molding structure.

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