Casting runner structure for dynamic and static scroll plates of air compressor
By designing a cast runner structure suitable for air compressor scrolls, the problem of difficulty in filling the scroll cavity in aluminum alloy casting is solved, the stable flow and filling of aluminum liquid is achieved, and the product quality is improved.
Patent Information
- Application Number
- CN202421763429.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-24
AI Technical Summary
The prior art is difficult to effectively fill the cavity of the scroll disk, especially the heat dissipation fin area, in the casting of aluminum alloys, resulting in defects such as pores and bubbles of the product, and the yield is low.
An air compressor motor static scroll cast runner structure is designed, including a material cake, a retaining ring and a runner arranged along the melt flow direction. The extension direction of the runner is facing the heat dissipation fins, the cross-sectional area gradually decreases from the melt flow direction, and a guide surface is provided at the gate to promote the filling of liquid aluminum.
By optimizing the runner structure, we ensure the stable flow of aluminum liquid, suppress unstable flow, ensure that the aluminum liquid fills the cavity smoothly, improve product quality, and reduce the occurrence of pores and bubbles.
Smart Images
Figure CN222817935U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of aluminum alloy casting, in particular to a casting runner structure of a dynamic and static scroll disc of an air compressor. Background Art
[0002] With the rapid development of industry, industrial air compressors are also widely used. The key components of air compressors: scroll disks, scroll disks include movable scroll disks and static scroll disks, which are related to the working performance of the entire machine. The current forming processes of movable and static disks include ordinary die casting, semi-solid die casting, extrusion casting and other methods. The effect of ordinary die casting is very poor, with many pores, bubbling in key parts after heat treatment, and low yield; the forming method of semi-solid die casting has a low yield, air entrapment cannot be solved, and the production capacity cannot meet production needs; the slow and high-pressure forming method of extrusion casting is better, but the design of its extrusion casting process and mold is unreasonable, and the extrusion casting production process is not strictly controlled. The products produced have defects such as insufficient pouring, cold shut, air entrapment, inclusions and air entrapment, which cannot meet the use needs of customers.
[0003] The die-casting of a scroll disk including heat dissipation fins is more difficult. For example, the structure of such a movable scroll disk includes a scroll surface on one side and a heat dissipation fin surface on the other side. During die-casting, it is difficult for the aluminum alloy metal liquid to completely fill the cavity. Utility Model Content
[0004] In order to solve the above problems in the prior art, the utility model provides a casting runner structure for a dynamic and stationary scroll disc of an air compressor.
[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:
[0006] A casting runner structure for a moving and stationary scroll of an air compressor comprises a material cake, a material retaining ring and a runner arranged along the flow direction of the molten liquid; the size of the material retaining ring is larger than the size of the material cake; the extension direction of the runner is arranged toward the extension direction of the heat dissipation fins of the moving and stationary scroll; the cross-sectional area of the runner perpendicular to the flow direction of the molten liquid gradually decreases from the flow direction of the molten liquid.
[0007] Furthermore, the runner includes a first runner area, a second runner area, a third runner area, and a fourth runner area along the flow direction of the molten metal.
[0008] Furthermore, the cross-sectional area of the first runner region perpendicular to the flow direction of the molten metal is 23-25 cm 2 The cross-sectional area of the second runner region perpendicular to the melt flow direction is 20-23cm 2 The cross-sectional area of the third runner region perpendicular to the melt flow direction is 17-20cm 2 The cross-sectional area of the fourth runner region perpendicular to the melt flow direction is 14-17cm 2 .
[0009] Furthermore, a guide surface facing the heat dissipation fins is provided at the gate of the runner.
[0010] Furthermore, the guide surface is an inclined surface or an arc-shaped guide surface.
[0011] Furthermore, when the runner is used for the movable scroll, the gate of the runner is connected to the reference plate surface in the middle of the movable scroll.
[0012] Furthermore, when the runner is used for a fixed scroll disk, a gate of the runner is connected to a reference plate surface on an upper portion of the fixed scroll disk.
[0013] Furthermore, the runner includes a first inclined surface and a second inclined surface that are arranged opposite to each other; the first inclined surface is arranged on one side close to the heat dissipation fins of the movable and stationary scroll disks; and the angle between the first inclined surface and the melt flow direction is smaller than the angle between the second inclined surface and the melt flow direction.
[0014] Furthermore, the central angle formed by the gate of the runner corresponding to the center of the moving and stationary scroll disks is 70°-150°.
[0015] Furthermore, the perimeter of the cross section of the runner perpendicular to the flow direction of the molten metal becomes longer as it approaches the gate.
[0016] The beneficial effects of the utility model are: by optimizing the shape structure of the runner, the stability of the aluminum liquid during flow is ensured, and the unstable flow of the aluminum liquid is suppressed; by gradually increasing the circumference of the cross section and reducing the cross-sectional area, the aluminum liquid is ensured to smoothly transform from a columnar shape to a wide thin sheet shape and flow into the cavity, the fluidity of the aluminum liquid is effectively improved, and the flow rate change of the aluminum liquid is suppressed under the changed cross-sectional shape, so that the aluminum liquid enters the cavity in a stable and good flow state, avoiding turbulence and turbulence of the aluminum liquid. At the same time, the extension direction of the runner is set in the same direction as the extension direction of the heat dissipation fins of the dynamic and static vortex disk, reducing obstacles during pouring, making it easier to fill the area of the heat dissipation fins, and through the setting of the material retaining ring, a part of the cold material is intercepted, and the molten liquid with a higher center temperature is filled, reducing temperature loss, which is conducive to improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 This is a reference diagram of the use status of the runner structure of the utility model;
[0019] Figure 2 yes Figure 1 corresponding cross-sectional schematic diagram;
[0020] Figure 3 This is the main view of the runner structure of the utility model in use state;
[0021] Figure 4 yes Figure 1 The corresponding explosion diagram;
[0022] Figure 5 yes Figure 4 The corresponding cross-sectional diagram;
[0023] Figure 6 It is a schematic cross-sectional view of the runner structure of the utility model;
[0024] Figure 7 yes Figure 6 The corresponding AA cross-section;
[0025] Figure 8 yes Figure 6 The corresponding BB cross-section;
[0026] Fig. 9 This is a rear view of the runner structure of the utility model in the use state;
[0027] Fig.10 This is a reference diagram of another pouring channel structure in the utility model;
[0028] Fig.11 This is a three-dimensional diagram of another pouring channel structure of the utility model in use state;
[0029] Fig.12 This is a side view of another pouring channel structure of the utility model in use state;
[0030] Fig.13 This is a rear view of another pouring channel structure of the utility model in use state;
[0031] Description of reference numerals:
[0032] 110, material cake; 120, retaining ring; 130, runner; 1301, first runner area; 1302, second runner area; 1303, third runner area; 1304, fourth runner area; 131, gate; 132, guide surface; 133, first inclined surface; 134, second inclined surface; 135, lower section; 136, upper section; 200, product; 201, reference plate surface; 202, vortex blade; 203, heat dissipation fin; 204, vortex blade matching groove; 210, slag bag; 220, exhaust duct. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] Example
[0037] A casting runner structure for a dynamic and static scroll of an air compressor comprises a material cake 110, a material blocking ring 120, and a runner 130 arranged along a molten metal flow direction; the size of the material blocking ring 120 is larger than that of the material cake 110; the extending direction of the runner 130 is arranged toward the extending direction of the heat dissipation fins 203 of the dynamic and static scroll; the cross-sectional area of the runner 130 perpendicular to the molten metal flow direction gradually decreases from the molten metal flow direction;
[0038] like Figure 1The figure shows the use state of the runner structure of the utility model. The product 200 produced by die casting is located behind the gate 131 of the runner 130. A plurality of slag bags 210 and exhaust passages 220 connected to the slag bags 210 are formed around the product 200. The product 200 includes a moving scroll plate and a fixed scroll plate. Figure 1 The product 200 described in the invention is a movable scroll disk; the movable scroll disk comprises a reference plate surface 201; a scroll sheet 202 is formed on one side of the reference plate surface 201, and a heat dissipation fin 203 is formed on the other opposite side; the extension direction of the runner 130 is arranged toward the extension direction of the heat dissipation fin 203 of the movable and stationary scroll disk, so that during die casting, the flow of the molten liquid / aluminum liquid can more easily fill the cavity where the heat dissipation fin 203 is located, forming a compact heat dissipation fin 203 structure; the extension direction of the runner 130 is usually in the same direction as the flow direction of the molten liquid, and when the extension direction of the heat dissipation fin 203 is in the same direction as the extension direction of the runner 130, the resistance to the flow of the molten liquid / aluminum liquid is smaller;
[0039] The overall shape of the retaining ring 120 and the material cake 110 is generally approximately cylindrical, and the diameter of the retaining ring 120 is larger than the diameter of the material cake 110. The retaining ring 120 and the material cake 110 are coaxially arranged. When the molten metal / aluminum liquid exceeds the retaining ring 120 during die casting, a portion of the cold material is left outside the retaining ring 120, that is, the size of the retaining ring 120 is larger than the peripheral area of the material cake 110, and the molten metal / aluminum liquid with a higher center temperature is continuously pushed into the runner 130, thereby ensuring the temperature uniformity of the molten metal / aluminum liquid in the runner 130 and improving the quality of the final product 200;
[0040] The change in the cross-sectional area of the runner 130 can further increase the stability of the flow of the molten aluminum / aluminum liquid in the runner 130, thereby avoiding / reducing splashing, turbulence, turbulence, etc. when the molten aluminum fills the cavity; the change in the cross-sectional area of the runner 130 is used to ensure the stability of the flow rate of the molten aluminum / aluminum liquid. When the molten aluminum / aluminum liquid flows in the runner 130, the flow rate of the molten aluminum / aluminum liquid will be reduced due to the existence of viscosity, and the flow rate of the molten aluminum / aluminum liquid can be increased by reducing the size of the cross-sectional area along the flow direction. The interaction between the two ensures the stability of the flow rate of the molten aluminum / aluminum liquid, so that it can better fill the cavity;
[0041] like Figure 2-3 As shown, in one embodiment, the runner 130 includes a first runner area 1301, a second runner area 1302, a third runner area 1303, and a fourth runner area 1304 along the flow direction of the molten metal; the cross-sectional area of the first runner area 1301 perpendicular to the flow direction of the molten metal is 23-25 cm 2 The cross-sectional area of the second runner region 1302 perpendicular to the flow direction of the molten metal is 20-23 cm 2The cross-sectional area of the third runner region 1303 perpendicular to the melt flow direction is 17-20cm 2 The cross-sectional area of the fourth runner region 1304 perpendicular to the melt flow direction is 14-17 cm 2 That is, the cross-sectional area change from the first runner region 1301 to the fourth runner region 1304 is continuous; Figure 3 The cross-sectional area of the horizontal line below the first runner area 1301 is 25 cm 2 The cross-sectional area at the horizontal line above the first runner area 1301 is 23 cm 2 , which is also the junction of the first runner area 1301 and the second runner area 1302; similarly, the horizontal line above the second runner area 1302 is the junction with the third runner area 1303, and the cross-sectional area here is 20cm 2 The horizontal line above the third runner area 1303 is the junction with the fourth runner area 1304, and the cross-sectional area here is 17cm 2 In another embodiment, the runner 130 may not be subdivided, and the cross-sectional area of the runner 130 perpendicular to the flow direction of the molten metal is 14-25 cm 2 During the filling process, the product 200 fills the cavity in a laminar flow manner at a speed of 0.1 to 0.3 m / s, and then the product 200 is pressurized and compensated at a specific pressure value of 90 to 110 MPa, thereby obtaining a casting with higher quality.
[0042] like Figure 4-5 As shown, in one embodiment, a guide surface 132 facing the heat dissipation fins 203 is provided at the gate 131 of the runner 130; in this embodiment, the runner 130 is preferably used for a movable scroll disk, that is, the product 200 in this embodiment is a movable scroll disk, and the gate 131 of the runner 130 is connected to the reference plate surface 201 in the middle of the movable scroll disk; since the product 200 is a movable scroll disk, the reference plate surface 201 of the movable scroll disk is respectively provided with a vortex sheet 202 and a heat dissipation fin 203 on both sides, and the reference plate surface 201 is also a relatively flat plate surface in the movable scroll disk, it is more suitable to be carried out here After the aluminum liquid / molten metal is poured at the reference plate surface 201, it needs to diffuse toward both sides of the reference plate surface 201 and fill the cavity to form a movable scroll disk. The guide surface 132 is provided to better fill the heat dissipation fins 203 and ensure that the heat dissipation fins 203 are fully filled. The guide surface 132 is an inclined surface or an arc-shaped guide surface, which can achieve full filling of the heat dissipation fins 203. Preferably, the guide surface 132 is an arc-shaped guide surface, so that it can have a better arc transition with the runner 130, reduce the resistance to the molten metal, and improve the smoothness and stability of the molten metal pouring.
[0043] In one embodiment, the perimeter of the cross section of the runner 130 perpendicular to the flow direction of the molten metal becomes longer as it approaches the gate 131. Figure 6-8 As shown, the cross sections at AA and BB near the third runner area 1303 are taken for illustration; the cross section at AA is the lower cross section 135, and the cross section at BB is the upper cross section 136; the cross-sectional area of the lower cross section 135 is 2097 mm 2 , the circumference of the cross section is 212mm; the cross-sectional area of the upper section 136 is 1669mm 2 , the circumference of the cross section is 234mm; that is, along the flow direction of the molten metal, the cross-sectional area of the runner 130 is gradually reduced, and the circumference of the cross section is gradually lengthened. The flow rate loss is offset by the gradual reduction of the cross-sectional area. The lengthening of the circumference of the cross section suppresses the change rate of the flow rate when the shape of the aluminum liquid is changed. The cross-sectional length near the gate 131 is long and thin, and the aluminum liquid / molten metal can be supplied in a wider direction. The molten metal has higher fluidity and is not easily obstructed, thereby improving the quality of the product 200 during casting, reducing the occurrence of air entrapment, and facilitating the sequential filling of the aluminum liquid. It is not easy to cause the loss of pressure, speed, and temperature, thereby effectively ensuring the filling time;
[0044] In one embodiment, if Fig. 9 As shown, the central angle formed by the gate 131 of the runner 130 corresponding to the center of the moving and stationary scroll disk is 70°-150°. In this embodiment, the product 200 is a moving scroll disk, and the central angle formed by the gate 131 of the runner 130 corresponding to the center of the moving scroll disk is α=90°. At this angle, the overall width of the gate 131 can cover more areas of the heat dissipation fins 203, and the diffusion area to both sides when the molten liquid enters the cavity of the product 200 from the gate 131 is small, and the pressure and speed losses of the molten liquid are small.
[0045] In one embodiment, if Figure 10-12As shown, in this embodiment, the product 200 is a static scroll disk; the reference plate surface 201 of the static scroll disk is biased upward, and the reference plate surface 201 is sealed toward one side to form a scroll sheet matching groove 204 and a heat dissipation fin 203; the heat dissipation fin 203 is located below the scroll sheet matching groove 204; therefore, during casting, the molten metal needs to have a flow direction toward the bottom of the reference plate surface 201 after exiting the gate 131, so as to better fill and form the heat dissipation fin 203 and the scroll sheet matching groove 204, and the runner 130 includes a first inclined surface 133 and a second inclined surface 134 arranged opposite to each other. The second inclined surface 134; the first inclined surface 133 is arranged on one side close to the heat dissipation fins 203 of the movable and stationary scroll disks; the angle between the first inclined surface 133 and the flow direction of the molten liquid is smaller than the angle between the second inclined surface 134 and the flow direction of the molten liquid, and the second inclined surface 134 enables the molten liquid to flow toward the heat dissipation fins 203 after exiting the gate 131, and the first inclined surface 133 also ensures that the molten liquid can flow toward the reference plate surface 201 after exiting the gate 131, and the diffusion direction of the molten liquid at the gate 131 matches the shape of the stationary scroll disk, making it easier to fill the cavity;
[0046] In one embodiment, if Fig.13 As shown, in the present embodiment, the product 200 is a static scroll disk; the central angle β formed by the gate 131 of the runner 130 corresponding to the center of the movable scroll disk is 110°. At this angle, the overall width of the gate 131 is equivalent to the width of one side of the reference plate surface 201. When the molten metal enters the cavity of the product 200 from the gate 131, the diffusion area to both sides is small, and the pressure and velocity losses of the molten metal are small.
[0047] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.
Claims
1. A casting runner structure for a dynamic and stationary scroll of an air compressor, characterized in that: It comprises a material cake (110), a material blocking ring (120), and a runner (130) arranged along the flow direction of the melt; the size of the material blocking ring (120) is larger than the size of the material cake (110); the extension direction of the runner (130) is arranged toward the extension direction of the heat dissipation fins (203) of the moving and stationary scroll disks; the cross-sectional area of the runner (130) perpendicular to the flow direction of the melt gradually decreases from the flow direction of the melt.
2. The casting runner structure of the air compressor dynamic and static scroll according to claim 1 is characterized in that: The runner (130) includes a first runner area (1301), a second runner area (1302), a third runner area (1303), and a fourth runner area (1304) along the flow direction of the molten liquid.
3. The casting runner structure of the air compressor dynamic and static scroll according to claim 2 is characterized in that: The cross-sectional area of the first runner region (1301) perpendicular to the flow direction of the molten metal is 23-25 cm 2 The cross-sectional area of the second runner region (1302) perpendicular to the flow direction of the molten metal is 20-23 cm 2 The cross-sectional area of the third runner region (1303) perpendicular to the melt flow direction is 17-20cm 2 The cross-sectional area of the fourth runner region (1304) perpendicular to the flow direction of the molten metal is 14-17 cm 2 .
4. The casting runner structure of the air compressor dynamic and static scroll according to claim 1 is characterized in that: A guide surface (132) facing the heat dissipation fins (203) is provided at the gate (131) of the runner (130).
5. The casting runner structure of the air compressor dynamic and static scroll according to claim 4 is characterized in that: The guide surface (132) is an inclined surface or an arc-shaped guide curved surface.
6. The casting runner structure of the air compressor dynamic and static scroll according to claim 1 is characterized in that: When the pouring channel (130) is used for a movable scroll, the pouring port (131) of the pouring channel (130) is connected to the reference plate surface (201) in the middle of the movable scroll.
7. The casting runner structure of the air compressor dynamic and static scroll according to claim 1 is characterized in that: When the runner (130) is used for a fixed scroll disk, the gate (131) of the runner (130) is connected to the reference plate surface (201) on the upper part of the fixed scroll disk.
8. The casting runner structure of the air compressor dynamic and static scroll according to claim 1 is characterized in that: The runner (130) comprises a first inclined surface (133) and a second inclined surface (134) which are arranged opposite to each other; the first inclined surface (133) is arranged close to one side of the heat dissipation fins (203) of the orbiting and stationary scroll disks; and the angle between the first inclined surface (133) and the flow direction of the melt is smaller than the angle between the second inclined surface (134) and the flow direction of the melt.
9. The casting runner structure of the air compressor dynamic and stationary scroll according to claim 1, characterized in that: The perimeter of the cross section of the runner (130) perpendicular to the flow direction of the molten liquid increases as it approaches the gate (131).
10. The casting runner structure of the air compressor dynamic and static scroll according to claim 1, characterized in that: The central angle formed by the gate (131) of the runner (130) and the center of the moving and stationary scroll disks is 70°-150°.