A whole cast high-speed three-dimensional flow impeller structure and a preparation process thereof

Abstract

The application belongs to the technical field of invention and three-dimensional flow impeller, and particularly relates to a novel whole-casting high-speed three-dimensional flow impeller structure and preparation process, which comprises a high-speed three-dimensional flow impeller body, a rotating rod, a heat dissipation assembly and a positioning assembly. The rotating rod is sleeved on the inner wall of one side of the high-speed three-dimensional flow impeller body. The heat dissipation assembly is fixed on the inner wall of one side of the rotating rod. The positioning assembly is fixed on the outer wall of one side of the high-speed three-dimensional flow impeller body. The heat dissipation assembly comprises a heat dissipation channel, a cooling liquid storage groove, a heat conduction rod and a flexible sealing ring. The heat dissipation assembly can continuously dissipate heat of the three-dimensional flow impeller, so that the heat generated by the impeller is reduced during high-speed rotation, the damage of high temperature to the blade is avoided, and the service life of the impeller is prolonged. The positioning assembly can be used for positioning and installing the three-dimensional flow impeller, so that the three-dimensional flow impeller is assisted in heat dissipation, and the use effect of the impeller is improved.

Description

Technical Field

[0001] This invention relates to the field of three-dimensional flow impeller technology, and particularly to a cast high-speed three-dimensional flow impeller structure and its manufacturing process. Background Technology

[0002] An impeller refers to both a wheel disk equipped with moving blades, which is a component of the rotor of an impulse steam turbine, and the general term for the wheel disk and the rotating blades mounted on it. Three-dimensional flow impellers are one type of impeller. However, existing high-speed three-dimensional flow impeller structures generally do not have heat dissipation structures, and generate a lot of heat when rotating at high speeds. Such sustained high temperatures can damage the blades and reduce the service life of the impeller. Moreover, in the manufacturing process of high-speed three-dimensional flow impeller structures, it is generally not possible to rapidly form the workpiece, which increases processing costs and time and reduces the processing effect of the workpiece. Summary of the Invention

[0003] The problem solved by this invention is to provide a cast high-speed three-dimensional flow impeller structure and manufacturing process, which can continuously dissipate heat from the three-dimensional flow impeller. This reduces the heat generated by the impeller during high-speed rotation, avoids damage to the blades caused by high temperatures, and improves the service life of the impeller. Moreover, the three-dimensional flow impeller can be positioned and installed to ensure auxiliary heat dissipation, which improves the performance of the impeller. Furthermore, the impeller manufacturing process allows for rapid prototyping of the workpiece, shortening processing costs and time, and improving the workpiece's production efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a cast high-speed three-dimensional flow impeller structure, comprising a high-speed three-dimensional flow impeller body, a rotating rod, a heat dissipation assembly, and a positioning assembly. The rotating rod is sleeved on one inner wall of the high-speed three-dimensional flow impeller body, the heat dissipation assembly is fixed on one inner wall of the rotating rod, and the positioning assembly is fixed on one outer wall of the high-speed three-dimensional flow impeller body.

[0005] Preferably, the heat dissipation assembly includes heat dissipation channels, a coolant storage tank, a heat-conducting rod, a flexible sealing ring, a cylinder, a first piston, a guide rod, a baffle plate, a spring, a second piston, a receiving groove, and a liquid outlet. Heat dissipation channels are distributed on one inner wall of the high-speed three-dimensional impeller body, and a coolant storage tank is provided on one inner wall of the rotating rod. Flexible sealing rings are distributed and connected to the heat dissipation channels on one inner wall of the coolant storage tank. A second piston is installed on one inner wall of the coolant storage tank, and a receiving groove is provided on the inner wall of the top of the second piston. A first piston is installed on one inner wall of the storage tank. Guide rods are symmetrically fixedly connected to the bottom outer wall of the first piston. Liquid outlet holes are distributed on the bottom inner wall of the storage tank corresponding to the guide rods. A baffle is fixedly connected to the bottom outer wall of the guide rod. A spring is welded to the top outer wall of the baffle, and the top of the spring is fixedly connected to the outer wall of the second piston. A cylinder is embedded in one inner wall of the coolant storage tank, and the bottom end of the cylinder's telescopic rod is fixedly connected to the outer wall of the first piston. Heat-conducting rods are symmetrically embedded in the top inner wall of the coolant storage tank.

[0006] Preferably, the positioning assembly includes a positioning groove, a lead screw, a rotating handle, a moving plate, a threaded hole, a positioning rod, a limiting ring, a guide hole, a limiting groove, and a positioning plate. Positioning plates are welded to one side of the outer wall of the rotating rod. A positioning groove is formed on the bottom inner wall of the high-speed three-dimensional impeller body corresponding to the positioning plate. A limiting ring is fitted onto one side of the inner wall of the rotating rod. A guide hole is formed on one side of the inner wall of the limiting ring. A positioning rod is fitted onto one side of the inner wall of the guide hole. A limiting groove is formed on one side of the inner wall of the rotating rod corresponding to the positioning rod. A moving plate is welded to one end of the outer wall of the positioning rod. A lead screw is rotatably connected to one side of the outer wall of the rotating rod. A threaded hole is formed on one side of the inner wall of the moving plate corresponding to the lead screw. A rotating handle is fixedly connected to one end of the outer wall of the lead screw.

[0007] Preferably, an inlet pipe is connected through one side of the inner wall of the coolant storage tank, and a leak-proof cover is sealed on one side of the outer wall of the inlet pipe.

[0008] Preferably, a battery is installed on one inner wall of the rotating rod, and the electrical output terminal of the battery is electrically connected to the electrical input terminal of the cylinder.

[0009] Preferably, one side of the spring is internally sleeved on the outer wall of the guide rod.

[0010] Preferred, a manufacturing process for a cast high-speed three-dimensional flow impeller structure includes the following steps: Step 1, prototype fabrication; Step 2, mold fabrication; Step 3, low-pressure casting; Step 4, physical and chemical testing; Step 5, heat treatment; Step 6, precision machining; Step 7, radiographic testing; Step 8, dynamic balancing; Step 9, overspeed testing; Step 10, coordinate measuring machine (CMM) testing; Step 11, dye penetrant testing; Step 12, finished product warehousing.

[0011] In step one, the high-speed three-dimensional flow impeller structure is first 3D printed using plastic according to the dimensions of the design drawing;

[0012] In step two, based on the prototype in step one, soft materials such as wax, silicone rubber, epoxy resin, and polyurethane are poured to shape the outside of the prototype, thereby forming a soft mold. The soft mold made by rapid prototyping is then combined with traditional processes such as investment casting, ceramic mold precision casting, electroforming, and cold spraying to produce a hard mold.

[0013] In step three, a hard mold is placed above a sealed crucible, and then compressed air is introduced into the crucible to create low pressure on the surface of the molten metal, causing the molten metal to rise from the riser pipe to fill the mold and control solidification, thereby forming a rough blank of a high-speed three-dimensional flow impeller.

[0014] In step four, the blank is chemically analyzed to test its composition using measuring tools, instruments, and reagents. Then, physical experiments are conducted to determine the blank's physical parameters such as hardness, strength, yield strength, and plasticity, and unqualified blanks are removed.

[0015] In step five, the qualified billet is cleaned and dried for later use. At this time, the billet is annealed in a pit-type carburizing electric furnace at a high temperature of 500-600℃. Then, an appropriate amount of methanol and kerosene are added. The billet is then kept at a temperature of 1-2 hours in a salt furnace. The billet is then air-cooled and finally tempered.

[0016] In step six, the tempered blank is then finished by turning and polishing;

[0017] In step seven, the workpiece from step six is ​​irradiated with X-rays to observe whether there are any defects inside the workpiece, and the workpieces that meet the standards are selected.

[0018] In step eight, the workpiece from step seven is placed inside the dynamic balancing testing instrument, and it is observed whether the workpiece vibrates. This can remove workpieces with uneven mass distribution.

[0019] In step nine, the workpiece from step eight is installed onto the operating equipment, and then the operating equipment is run continuously for 2 to 4 hours at 20-25% of its rated load to observe whether any problems occur with the workpiece.

[0020] In step ten, the workpiece from step nine is inspected and measured using a coordinate measuring machine to determine whether the error of the workpiece is within the tolerance range.

[0021] In step eleven, colored oil is used as a penetrating liquid to soak the workpiece from step ten, and then the workpiece surface is observed under natural light to see if there are any defects.

[0022] In step 12, qualified workpieces are labeled and recorded, and then stored in the warehouse.

[0023] Preferably, the low pressure in step three is 0.06 to 0.15 MPa.

[0024] The beneficial effects of this invention are: by adopting a heat dissipation component, the three-dimensional flow impeller can be continuously cooled, thus reducing the heat generated by the impeller during high-speed rotation, avoiding damage to the blades caused by high temperature, and improving the service life of the impeller.

[0025] The use of positioning components allows for the precise positioning and installation of the three-dimensional flow impeller, ensuring auxiliary heat dissipation and improving the impeller's performance.

[0026] In the impeller manufacturing process, the workpiece can be rapidly formed, which shortens the processing cost and time, and improves the workpiece's production efficiency. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of the present invention viewed from below;

[0029] Figure 3 This is a front sectional view of the present invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged view of the structure of region A in the image;

[0031] Figure 5 This is a process flow diagram of the present invention.

[0032] Legend:

[0033] 1. High-speed three-dimensional impeller body; 2. Rotating rod; 3. Heat dissipation assembly; 4. Positioning assembly; 5. Liquid inlet pipe; 6. Leak-proof cover; 7. Battery; 301. Heat dissipation channel; 302. Coolant storage tank; 303. Heat-conducting rod; 304. Flexible sealing ring; 305. Cylinder; 306. First piston; 307. Guide rod; 308. Baffle plate; 309. Spring; 3010. Second piston; 3011. Storage groove; 3012. Liquid outlet; 401. Positioning groove; 402. Lead screw; 403. Rotating handle; 404. Moving plate; 405. Threaded hole; 406. Positioning rod; 407. Limiting ring; 408. Guide hole; 409. Limiting groove; 4010. Positioning plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0035] See Figures 3-4 A cast-in-place high-speed three-dimensional flow impeller structure includes a high-speed three-dimensional flow impeller body 1, a rotating rod 2, a heat dissipation assembly 3, and a positioning assembly 4. The rotating rod 2 is sleeved on one inner wall of the high-speed three-dimensional flow impeller body 1, and the heat dissipation assembly 3 is fixed on one inner wall of the rotating rod 2. The positioning assembly 4 is fixed on one outer wall of the high-speed three-dimensional flow impeller body 1. An inlet pipe 5 is connected through one inner wall of a coolant storage tank 302, and a leak-proof cover 6 is sealed on one outer wall of the inlet pipe 5. By unscrewing the leak-proof cover 6, coolant is injected into the coolant storage tank 302 through the inlet pipe 5, and then the leak-proof cover 6 is used to cover the inlet pipe 5 to facilitate coolant injection. A battery 7 is installed on one inner wall of the rotating rod 2, and the electrical output terminal of the battery 7 is electrically connected to the electrical input terminal of a cylinder 305, which can supply power to the cylinder 305 to ensure heat dissipation of the equipment.

[0036] The heat dissipation assembly 3 includes a heat dissipation channel 301, a coolant storage tank 302, a heat-conducting rod 303, a flexible sealing ring 304, a cylinder 305, a first piston 306, a guide rod 307, a baffle 308, a spring 309, a second piston 3010, a receiving groove 3011, and a liquid outlet 3012. A heat dissipation channel 301 is distributed on one inner wall of the high-speed three-dimensional impeller body 1. A coolant storage tank 302 is distributed on one inner wall of the rotating rod 2. Flexible sealing rings 304 are distributed and connected to the heat dissipation channel 301 on one inner wall of the coolant storage tank 302. A second piston 3010 is installed on one inner wall of the coolant storage tank 302. A receiving groove 3011 is formed on the inner wall of the top of the second piston 3010. A first piston 306 is installed on one inner wall of the receiving groove 3011. Guide rods 304 are symmetrically fixed to the outer wall of the bottom end of the first piston 306. 07. Liquid outlet holes 3012 are distributed on the inner wall of the bottom end of the storage tank 3011 corresponding to the guide rod 307. A baffle 308 is fixedly connected to the outer wall of the bottom end of the guide rod 307. A spring 309 is welded to the outer wall of the top end of the baffle 308, and the top end of the spring 309 is fixed to the outer wall of the second piston 3010. A cylinder 305 is embedded in the inner wall of one side of the coolant storage tank 302, and the bottom end of the telescopic rod of the cylinder 305 is fixed to the outer wall of the first piston 306. Heat-conducting rods 303 are symmetrically embedded in the inner wall of the top end of the coolant storage tank 302. One side of the spring 309 is sleeved on the outer wall of the guide rod 307. Under the elastic force of the spring 309 and the pressure of the coolant, the liquid outlet holes 3012 in the second piston 3010 can move along the guide rod 307 on the baffle 308, thereby separating the first piston 306 from the storage tank 3011.

[0037] Working principle: Before the high-speed three-dimensional impeller body 1 starts operating, unscrew the leak-proof cover 6 and inject coolant into the coolant storage tank 302 through the inlet pipe 5. Then, cover the inlet pipe 5 with the leak-proof cover 6. When the high-speed three-dimensional impeller body 1 needs heat dissipation, start the cylinder 305 to lower the first piston 306, causing the guide rod 307 on the first piston 306 to enter the receiving tank 3011 along the outlet hole 3012. The first piston 306 and the second piston 3010 squeeze the coolant, which is then injected into the heat dissipation channel 301 through the flexible sealing ring 304. When the coolant absorbs a large amount of heat, it will be injected above the first piston 306 and the second piston 3010. The heat is then dissipated through the heat-conducting rod 303. At this time, the cylinder 305 is activated to reset the first piston 306. Then, under the elastic force of the spring 309 and the pressure of the coolant, the outlet hole 3012 in the second piston 3010 can move along the guide rod 307 on the baffle 308, thereby separating the first piston 306 from the receiving groove 3011. At this time, the cooled coolant is re-injected into the area below the first piston 306 and the second piston 3010 through the outlet hole 3012, thus forming a heat dissipation cycle. This can continuously dissipate heat from the three-dimensional impeller, thereby reducing the heat generated by the impeller during high-speed rotation, avoiding damage to the blades caused by high temperature, and improving the service life of the impeller. Example

[0038] See Figures 1-3 The positioning component 4 includes a positioning groove 401, a lead screw 402, a rotating handle 403, a moving plate 404, a threaded hole 405, a positioning rod 406, a limiting ring 407, a guide hole 408, a limiting groove 409, and a positioning plate 4010. Positioning plates 4010 are welded to one side of the outer wall of the rotating rod 2. A positioning groove 401 is formed on the inner wall of the bottom end of the high-speed three-dimensional impeller body 1 corresponding to the positioning plate 4010. A limiting ring 407 is sleeved on one side of the inner wall of the rotating rod 2. A guide hole 408 is provided on one side of the inner wall of rod 7. A positioning rod 406 is sleeved on one side of the inner wall of the guide hole 408. A limit groove 409 is provided on one side of the inner wall of the rotating rod 2 corresponding to the positioning rod 406. A movable plate 404 is welded to one end of the outer wall of the positioning rod 406. A lead screw 402 is rotatably connected to one side of the outer wall of the rotating rod 2. A threaded hole 405 is provided on one side of the inner wall of the movable plate 404 corresponding to the lead screw 402. A rotating handle 403 is fixedly connected to one end of the outer wall of the lead screw 402.

[0039] First, insert the rotating rod 2 into the high-speed three-dimensional impeller body 1, and insert the positioning plate 4010 into the positioning groove 401. Then, place the limiting ring 407 on the top of the high-speed three-dimensional impeller body 1. At this time, turn the rotating handle 403 to rotate the lead screw 402. Then, under the action of the threaded hole 405, the positioning rod 406 on the moving plate 404 is inserted into the limiting groove 409 along the guide hole 408, thereby positioning the high-speed three-dimensional impeller body 1. This allows for the positioning and installation of the three-dimensional impeller, ensuring auxiliary heat dissipation of the three-dimensional impeller and improving the impeller's performance. Example

[0040] See Figure 5 A fabrication process for a cast high-speed three-dimensional flow impeller structure includes the following steps: Step 1, prototype fabrication; Step 2, mold fabrication; Step 3, low-pressure casting; Step 4, physical and chemical testing; Step 5, heat treatment; Step 6, precision machining; Step 7, X-ray inspection; Step 8, dynamic balancing; Step 9, overspeed testing; Step 10, coordinate measuring machine (CMM) inspection; Step 11, dye penetrant testing; Step 12, finished product warehousing.

[0041] In step one, the high-speed three-dimensional flow impeller structure is first 3D printed using plastic according to the dimensions of the design drawing;

[0042] In step two, based on the prototype in step one, soft materials such as wax, silicone rubber, epoxy resin, and polyurethane are poured to shape the outside of the prototype, thereby forming a soft mold. The soft mold made by rapid prototyping is then combined with traditional processes such as investment casting, ceramic mold precision casting, electroforming, and cold spraying to produce a hard mold.

[0043] In step three, a hard mold is placed above a sealed crucible, and then compressed air is introduced into the crucible to create a low pressure on the surface of the molten metal. This causes the molten metal to rise from the riser pipe to fill the mold and control solidification, thereby forming a rough blank of a high-speed three-dimensional flow impeller. The pressure of the low air pressure in step three is 0.06 to 0.15 MPa.

[0044] In step four, the blank is chemically analyzed to test its composition using measuring tools, instruments, and reagents. Then, physical experiments are conducted to determine the blank's physical parameters such as hardness, strength, yield strength, and plasticity, and unqualified blanks are removed.

[0045] In step five, the qualified billet is cleaned and dried for later use. At this time, the billet is annealed in a pit-type carburizing electric furnace at a high temperature of 500-600℃. Then, an appropriate amount of methanol and kerosene are added. The billet is then kept at a temperature of 1-2 hours in a salt furnace. The billet is then air-cooled and finally tempered.

[0046] In step six, the tempered blank is then finished by turning and polishing;

[0047] In step seven, the workpiece from step six is ​​irradiated with X-rays to observe whether there are any defects inside the workpiece, and the workpieces that meet the standards are selected.

[0048] In step eight, the workpiece from step seven is placed inside the dynamic balancing testing instrument, and it is observed whether the workpiece vibrates. This can remove workpieces with uneven mass distribution.

[0049] In step nine, the workpiece from step eight is installed onto the operating equipment, and then the operating equipment is run continuously for 2 to 4 hours at 20-25% of its rated load to observe whether any problems occur with the workpiece.

[0050] In step ten, the workpiece from step nine is inspected and measured using a coordinate measuring machine to determine whether the error of the workpiece is within the tolerance range.

[0051] In step eleven, colored oil is used as a penetrating liquid to soak the workpiece from step ten, and then the workpiece surface is observed under natural light to see if there are any defects.

[0052] In step 12, qualified workpieces are labeled and recorded, and then stored in the warehouse.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cast-in-place high-speed three-dimensional flow impeller structure, characterized in that, The device includes a high-speed three-dimensional impeller body (1), a rotating rod (2), a heat dissipation assembly (3), and a positioning assembly (4). A rotating rod (2) is sleeved on one inner wall of the high-speed three-dimensional impeller body (1), and a heat dissipation assembly (3) is fixed on one inner wall of the rotating rod (2). A positioning assembly (4) is fixed on one outer wall of the high-speed three-dimensional impeller body (1). The heat dissipation assembly (3) includes a heat dissipation channel (301), a coolant storage tank (302), a heat-conducting rod (303), a flexible sealing ring (304), and a gas... The high-speed three-dimensional impeller body (1) has a cylinder (305), a first piston (306), a guide rod (307), a baffle (308), a spring (309), a second piston (3010), a storage groove (3011), and a liquid outlet (3012). A heat dissipation channel (301) is distributed on one side of the inner wall of the high-speed three-dimensional impeller body (1). A coolant storage tank (302) is distributed on one side of the inner wall of the rotating rod (2). A flexible seal is distributed and connected to the heat dissipation channel (301) on one side of the inner wall of the coolant storage tank (302). A second piston (3010) is installed on one inner wall of the coolant storage tank (302), and a receiving groove (3011) is opened on the top inner wall of the second piston (3010). A first piston (306) is installed on one inner wall of the receiving groove (3011). Guide rods (307) are symmetrically fixedly connected to the bottom outer wall of the first piston (306). Liquid outlet holes (3012) are distributed on the bottom inner wall of the receiving groove (3011) corresponding to the guide rods (307). A baffle (308) is fixedly connected to the bottom outer wall of the rod (307). A spring (309) is welded to the top outer wall of the baffle (308), and the top of the spring (309) is fixed to the outer wall of the second piston (3010). A cylinder (305) is embedded in the inner wall of one side of the coolant storage tank (302), and the bottom end of the telescopic rod of the cylinder (305) is fixed to the outer wall of the first piston (306). Heat-conducting rods (303) are symmetrically embedded in the inner wall of the top of the coolant storage tank (302).

2. The integrally cast high-speed three-dimensional flow impeller structure according to claim 1, characterized in that, The positioning assembly (4) includes a positioning groove (401), a lead screw (402), a rotating handle (403), a moving plate (404), a threaded hole (405), a positioning rod (406), a limiting ring (407), a guide hole (408), a limiting groove (409), and a positioning plate (4010). The positioning plate (4010) is welded to one side of the outer wall of the rotating rod (2). The positioning groove (401) is provided on the bottom inner wall of the high-speed three-dimensional impeller body (1) corresponding to the positioning plate (4010). The limiting ring (407) is sleeved on one side of the inner wall of the rotating rod (2). A guide hole (408) is provided on one side of the inner wall of the rotating rod (2). A positioning rod (406) is sleeved on one side of the inner wall of the guide hole (408). A limit groove (409) is provided on one side of the inner wall of the rotating rod (2) corresponding to the positioning rod (406). A movable plate (404) is welded on one end of the outer wall of the positioning rod (406). A lead screw (402) is rotatably connected on one side of the outer wall of the rotating rod (2). A threaded hole (405) is provided on one side of the inner wall of the movable plate (404) corresponding to the lead screw (402). A rotating handle (403) is fixedly connected on one end of the outer wall of the lead screw (402).

3. The integrally cast high-speed three-dimensional flow impeller structure according to claim 1, characterized in that, A liquid inlet pipe (5) is connected through the inner wall of one side of the coolant storage tank (302), and a leak-proof cover (6) is sealed on the outer wall of one side of the liquid inlet pipe (5).

4. The integrally cast high-speed three-dimensional flow impeller structure according to claim 1, characterized in that, A storage battery (7) is installed on one side of the inner wall of the rotating rod (2), and the electrical output terminal of the storage battery (7) is electrically connected to the electrical input terminal of the cylinder (305).

5. The integrally cast high-speed three-dimensional flow impeller structure according to claim 1, characterized in that, The spring (309) is internally sleeved on one side of the guide rod (307) on the outer wall.

6. A fabrication process for a cast high-speed three-dimensional flow impeller structure, comprising the following steps: Step 1: Prototype fabrication; Step 2: Mold fabrication; Step 3: Low-pressure casting; Step 4: Physical and chemical testing; Step 5: Heat treatment; Step 6: Finishing; Step 7: Radiographic testing; Step 8: Dynamic balancing; Step 9: Overspeed testing; Step 10: Coordinate measuring machine (CMM); Step 11: Dyeing flaw detection; Step 12: Finished product warehousing; Its features are: In step one, the high-speed three-dimensional flow impeller structure is first 3D printed using plastic according to the dimensions of the design drawing; In step two, based on the prototype in step one, wax, silicone rubber, epoxy resin, and polyurethane soft materials are poured and molded on the outside of the prototype to form a soft mold. The soft mold made by rapid prototyping is then combined with traditional processes such as investment casting, ceramic mold precision casting, electroforming, and cold spraying to make a hard mold. In step three, a hard mold is placed above a sealed crucible, and then compressed air is introduced into the crucible to create low pressure on the surface of the molten metal, causing the molten metal to rise from the riser pipe to fill the mold and control solidification, thereby forming a rough blank of a high-speed three-dimensional flow impeller. In step four, the blank is chemically analyzed using measuring tools, instruments, and reagents to examine its composition, and then physical experiments are conducted to determine its hardness, strength, yield strength, and plasticity parameters, thereby removing any unqualified blanks. In step five, the qualified billet is cleaned and dried for later use. At this time, the billet is annealed in a pit-type carburizing electric furnace at a high temperature of 500-600℃. Then, an appropriate amount of methanol and kerosene are added. The billet is then kept at a temperature of 1-2 hours in a salt furnace. The billet is then air-cooled and finally tempered. In step six, the tempered blank is then finished by turning and polishing; In step seven, the workpiece from step six is ​​irradiated with X-rays to observe whether there are any defects inside the workpiece, and the workpieces that meet the standards are selected. In step eight, the workpiece from step seven is placed inside the dynamic balancing testing instrument, and it is observed whether the workpiece vibrates. This can remove workpieces with uneven mass distribution. In step nine, the workpiece from step eight is installed onto the operating equipment, and then the operating equipment is run continuously for 2 to 4 hours at 20-25% of its rated load to observe whether any problems occur with the workpiece. In step ten, the workpiece from step nine is inspected and measured using a coordinate measuring machine to determine whether the error of the workpiece is within the tolerance range. In step eleven, colored oil is used as a penetrating liquid to soak the workpiece from step ten, and then the workpiece surface is observed under natural light to see if there are any defects. In step 12, qualified workpieces are labeled and recorded, and then stored in the warehouse.

7. The manufacturing process of a cast high-speed three-dimensional flow impeller structure according to claim 6, characterized in that, The low pressure in step three is 0.06 to 0.15 MPa.

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