Double-runner volute
By introducing a heating riser, flow channel core, and cladding core structure into the dual-channel volute, using ceramsite sand-coated sand, and optimizing the position of the chills, problems such as suction pockets, shrinkage porosity, and tongue tip core breakage in volute casting were solved, thus improving core quality and process efficiency.
Patent Information
- Application Number
- CN202422820502.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-19
AI Technical Summary
During the casting process of dual-channel volutes, problems such as suction pitting, shrinkage porosity, core breakage at the tongue tip, unqualified internal roughness, and sand core expansion often occur, affecting the core quality.
The above problems were solved by introducing heating risers, adaptable flow channel cores and shell core structures into the volute design, using coated sand containing ceramsite sand, optimizing the position of chills, and improving the core assembly process.
It improves the shrinkage compensation effect of the volute, reduces suction and shrinkage, enhances the high-temperature strength of the sand core, reduces thermal expansion, and improves the core-making quality and process yield.
Smart Images
Figure CN223536619U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of turbocharger casting technology, specifically relating to a dual-flow volute for automobiles. Background Technology
[0002] Twin-slot volutes are important components in fluid machinery (such as turbochargers and centrifugal pumps), primarily functioning to collect and accelerate fluids before guiding them to a turbine or impeller for energy conversion. However, during the casting process of twin-slot volutes, suction indentation and shrinkage porosity often occur at the diaphragm section. This means that localized material depressions occur due to air intake or the pressure difference caused by air intake. Molten iron enters the twin-slot volute through the pouring cup and then flows into the volute via the cold riser for casting. During the solidification process, insufficient feeding can lead to suction indentation and shrinkage porosity in the diaphragm.
[0003] After entering the volute, the material of the flow channel core can cause the tongue tip to break, and the roughness of the inner cavity is not up to standard, causing the sand core to expand, which in turn causes the volute to expand and crack. At the same time, due to the fit between the shell core and the flow channel core, the flow channel core does not pass through the round hole on the surface of the volute and is not flush with the shell core, causing the coating to fall into the cavity, resulting in R-cavity slurry holes.
[0004] In the casting process of a dual-flow-channel volute, eight chills (i.e., components used to accelerate the cooling of molten metal) are installed across the entire surface and inside the volute. Sometimes, the surface of the sand core becomes loose, meaning the molten metal fails to completely fill the chill areas. This can lead to incomplete core formation in the chill areas (loose sand core surface) during the core-making process, affecting the core quality. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a dual-flow-channel volute to address the shortcomings of the existing technology.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] A dual-flow volute includes a body and a horizontal runner, characterized in that: the body includes a volute, an air inlet flange is provided on one side of the volute, a riser is provided on the air inlet flange, the riser is fixedly connected to the horizontal runner, and a pouring cup is provided in the middle of the horizontal runner;
[0008] The volute is provided with a first air intake and a second air intake. A partition is provided on one side of the first air intake and the second air intake. The air intake and the air intake form a vortex chamber inside the volute.
[0009] Furthermore, the surface of the volute is provided with a heating riser, which is connected to the horizontal runner.
[0010] Furthermore, the volute has a circular hole and a flow channel core disposed within the circular hole, and a shell core is disposed on the surface of the volute. The flow channel core is disposed inside the volute through the circular hole and the shell core, and the circular hole and the flow channel core are adapted to each other.
[0011] Furthermore, the material of the flow channel core is coated sand containing ceramsite sand.
[0012] Furthermore, the longitudinal section of the volute is arc-shaped.
[0013] Furthermore, a chill is provided below the second air intake duct in the volute.
[0014] Furthermore, the heating riser is provided with a heating riser sleeve.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] A riser is fixedly installed on the air intake flange on one side of the volute. A heating riser is fixedly installed on the surface of the volute. A riser sleeve is fitted on the heating riser. There are intermediate partitions in the first and second air intake passages inside the volute. By setting a heating riser on the volute, the feeding can be increased, the problem of suction and shrinkage of the intermediate partition can be solved, and the process yield can be improved.
[0017] The volute has a circular hole inside, and inside the volute are a cladding core and a flow channel core. The cladding core is installed with the flow channel core through the circular hole, and the circular hole and the flow channel core are adapted to each other. By adjusting the mating structure of the cladding core and the flow channel core head, the problem of the coating of the flow channel core head falling into the cavity during core assembly is solved, which causes R-arc slurry holes. At the same time, the coating sand containing ceramsite sand used through the flow channel core coating sand is adjusted to increase the high temperature strength of the sand core and reduce the thermal expansion of the sand core, thus solving the problems of core tip breakage and core splintering.
[0018] The volute is located below the air intake and has a chill. The chill is optimized to prevent the surface of the sand core from becoming loose. Attached Figure Description
[0019] The present invention will now be described in further detail with reference to the accompanying drawings.
[0020] Figure 1 : A schematic diagram of the overall structure of Embodiment 1 of this utility model;
[0021] Figure 2 Cross-sectional view of the volute structure of Embodiment 1 of this utility model;
[0022] Figure 3 Cross-sectional view of the core assembly process before adjustment in Embodiment 1 of this utility model;
[0023] Figure 4 : A cross-sectional view of the adjusted core assembly process of Embodiment 1 of this utility model.
[0024] Among them, 100-volute, 101-heating riser sleeve, 102-riser, 103-pour cup, 104-horizontal runner, 105-heating riser, 106-round hole, 200-body, 201-vortex chamber, 202-middle partition, 203-chill, 204-inlet flange, 205-first inlet passage, 206-second inlet passage, 301-shell core, 302-flow channel core, 401-shell core, 402-flow channel core. Detailed Implementation
[0025] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.
[0026] Example 1: See Figure 1-4 This embodiment of a dual-flow volute includes a body 200, which includes four volutes 100 connected to a horizontal runner 104. An air inlet flange 204 is provided on one side of each volute, and a riser 102 is fixedly connected to the air inlet flange 204. The riser 102 is fixedly connected to the horizontal runner 104. A heating riser 105 is fixedly installed on the surface of each volute 100, and a heating riser sleeve 101 is attached to the heating riser 105. The heating riser 105 is fixedly connected to the horizontal runner 104. A pouring cup 103 is fixedly installed in the middle of the horizontal runner. The volute 100 has a first air inlet 205 and a second air inlet 206. A partition plate 202 is provided inside the first air inlet 205 and the second air inlet 206. The fixed installation of the heating riser 105 on the surface of the volute 100 can increase riser heating, reduce shrinkage, and prevent the partition plate 202 from sinking or loosening.
[0027] See Figure 3 In the prior art, the volute 100 has a circular hole 106 inside. The original volute 100 has a shell core 401 and a flow channel core 402. When the flow channel core 402 is engaged with the shell core 401 through the circular hole 106, the flow channel core 402 and the shell core 401 are horizontally aligned, causing the core coating to fall into the cavity, resulting in R-arc sprue holes.
[0028] See Figure 4 By adjusting the mating position of the shell core 301 and the flow channel core 302 so that the flow channel core 302 passes through the round hole 106 and is fixed to the shell core 301, the problem of the coating of the flow channel core falling into the cavity during core assembly is solved by adjusting the mating structure of the shell core 301 and the flow channel core 302. At the same time, the coating sand of the flow channel core 302 is replaced. Using coating sand containing ceramsite sand can increase the high temperature strength of the sand core, reduce the thermal expansion of the sand core, and solve the problems of core breakage at the tongue tip and core burrs.
[0029] Beneficial effects:
[0030] A riser 102 is fixedly installed on the intake flange 204 on one side of the volute 100. A heating riser 105 is fixedly installed on the surface of the volute 100. A heating riser sleeve 101 is fitted on the heating riser 105. There is a middle partition 202 inside the intake passage of the volute 100. By setting the heating riser sleeve 101 on the heating riser 105 of the volute 100, the feeding can be increased and the problems of suction and shrinkage of the middle partition can be solved, thereby improving the process yield.
[0031] The use of 302 coated sand containing ceramsite in the flow channel core increases the high-temperature strength of the sand core, reduces the thermal expansion of the sand core, and solves the problems of core breakage at the tongue tip and core splintering.
[0032] The volute 100 has a circular hole 106 inside and a flow channel core 302 set in the circular hole 106. The volute 100 has a shell core 301 inside. The flow channel core 302 is detachably installed in the volute 100 through the circular hole 106 and the shell core 301. The circular hole and the flow channel core 302 are adapted to each other. By adjusting the mating structure of the shell core 301 and the flow channel core 302, the problem of the coating of the flow channel core 302 falling into the cavity during core assembly is solved, which causes R-arc sprue holes.
[0033] Example 2 is a further improvement based on Example 1. The volute 100 is provided with a chill 203 below the air intake 206. By reducing the number of chills, the surface of the sand core is prevented from becoming loose.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A dual-flow-channel volute, comprising a body (200) and a transverse runner (104), characterized in that: The main body (200) includes a volute (100), an air inlet flange (204) is provided on one side of the volute (100), a riser (102) is provided on the air inlet flange (204), the riser (102) is fixedly connected to the horizontal runner (104), and a pouring cup (103) is provided in the middle of the horizontal runner (104). The volute (100) is provided with a first air intake (205) and a second air intake (206). A partition (202) is provided on one side of the interior of the air intake (205) and the air intake (206). The first air intake (205) and the second air intake (206) form a vortex chamber (201) inside the volute (100).
2. The dual-channel volute according to claim 1, characterized in that: The surface of the volute (100) is provided with a heating riser (105), which is connected to the horizontal runner (104).
3. The dual-channel volute according to claim 1, characterized in that: The volute (100) has a circular hole (106) inside and a flow channel core (302) disposed in the circular hole (106). The surface of the volute (100) has a shell core (301). The flow channel core (302) is disposed in the volute (100) through the circular hole (106) and the shell core (301). The circular hole (106) and the flow channel core (302) are adapted to each other.
4. The dual-channel volute according to claim 3, characterized in that: The material of the flow channel core (302) is coated sand containing ceramsite sand.
5. The dual-channel volute according to claim 1, characterized in that: The longitudinal section of the volute (100) is arc-shaped.
6. The dual-channel volute according to claim 1, characterized in that: The volute (100) is provided with a chill (203) located below the second air intake (206).
7. The dual-channel volute according to claim 2, characterized in that: A heating riser sleeve (101) is provided on the heating riser (105).