Vacuum directional solidification furnace gas cooling system based on pressure gradient principle

Abstract

The invention discloses a vacuum directional solidification furnace gas cooling system based on a pressure gradient principle, and relates to the technical field of cooling. The vacuum directional solidification furnace gas cooling system based on the pressure gradient principle comprises a cooling chamber and a cooling mechanism, the cooling mechanism comprises an extraction opening, a first gas storage tank and a second gas storage tank, and a vacuumizing pump is installed between the surface of the first gas storage tank and the side of the bottom of the extraction opening; a booster pump is installed on the side, away from the vacuumizing pump, of the surface of the first air storage tank, an air injection assembly is installed at the top of the inner wall of the cooling chamber and comprises a circular air channel and an air nozzle, an air inlet of the circular air channel communicates with an air outlet of the flow adjusting valve, and the air nozzle is installed on the inner side face of the circular air channel. The supporting shaft is fixedly connected to the middle of the inner cavity of the air nozzle, the rotating fan blades are rotationally installed on the outer circle face of the supporting shaft, the uniform cooling purpose is achieved, a rotational flow circulating cooling mode is adopted, temperature difference is not prone to occurring, and the cooling effect is good.

Description

Technical Field

[0001] The invention relates to the field of cooling technology, in particular to a vacuum directional solidification furnace gas cooling system based on the pressure gradient principle. Background Art

[0002] Nickel-based single-crystal superalloys are widely used in critical hot-end components of aircraft engines and ground-based gas turbines due to their excellent high-temperature performance. Cast superalloys offer the advantages of high strength and heat resistance. With the advancement of precision casting and ceramic core technology, cast superalloys have become the preferred material for modern aircraft engine turbine blades and guide vanes. Early superalloy blades produced using precision casting exhibited an equiaxed grain structure, with the matrix cut by chaotically arranged grain boundaries. Directional solidification techniques, however, have resulted in blades with directional columnar grains that eliminate transverse grain boundaries perpendicular to the principal stress axes, significantly improving their performance.

[0003] At present, in the existing technology, it is inconvenient to perform directional cooling when cooling the blades, and as the length of some blades increases, there will be local high and local low temperatures on the blades, resulting in a large temperature difference, which affects the cooling effect of the blades. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle, comprising:

[0006] A furnace body, and a cooling chamber fixedly installed at the bottom of the furnace body;

[0007] A cooling mechanism, which is used to circulate and directionally blow the gas and cool the blades, and is installed outside the cooling chamber;

[0008] The cooling mechanism includes an air extraction port, a first air storage tank, and a second air storage tank. The air extraction port is sealed and installed at the bottom of the cooling chamber. A vacuum pump is installed between the surface of the first air storage tank and the side of the bottom of the air extraction port. A booster pump is installed on the surface of the first air storage tank and on a side away from the vacuum pump. A heat exchanger is installed between the booster pump and the second air storage tank. A flow regulating valve is installed at the air outlet of the second air storage tank. An injection assembly is installed at the top of the inner wall of the cooling chamber.

[0009] The jet assembly includes a circular air duct and an air jet nozzle, the annular surface of the circular air duct is fixedly connected to the top position of the inner wall of the cooling chamber, and the air inlet of the circular air duct is communicated with the air outlet of the flow regulating valve, the air jet nozzle is installed on the inner side surface of the circular air duct, and a support shaft is fixedly connected to the middle of the inner cavity of the air jet nozzle, and a rotating fan blade is rotatably installed on the outer circular surface of the support shaft. The cooling inert gas in the cooling chamber is sucked out from the air suction port through the air suction port of the vacuum pump and transported to the first gas storage tank. The gas is pressurized by the booster pump, so that the gas enters the interior of the heat exchanger, heat exchange and temperature reduction of the gas are performed on the gas, and the gas enters the interior of the second gas storage tank. The gas flow is controlled by the flow regulating valve, so that the inert gas can enter the interior of the circular air duct and be blown into the interior of the cooling chamber from the air jet nozzle, thereby performing directional blowing. The air suction and jetting are repeated in this way to perform cooling.

[0010] Preferably, the air extraction port is in an inverted cone shape as a whole, and the air injection assembly is installed directly above the air extraction port.

[0011] Preferably, the air inlet of the vacuum pump passes through the side of the bottom of the air outlet and extends into the interior thereof, and the first air storage tank and the second air storage tank are installed at the same height.

[0012] By tilting the air nozzle, the cooling inert gas blown out by the air nozzle presents a swirl shape, and the cooling inert gas is blown obliquely downward to cool the material in the cooling chamber. By evenly installing the air nozzle on the inner side of the circular air duct, multiple air nozzles can be used to blow air together, thereby increasing the exhaust volume of the cooling inert gas and further helping to cool the material.

[0013] Preferably, the air nozzles are installed at an angle, there are six air nozzles, and the six air nozzles are evenly installed on the inner side of the circular air duct, and there are four rotating blades, and the four rotating blades are evenly distributed on the outer circular surface of the support shaft.

[0014] When the cooling inert gas is blown out from the air nozzle, the cooling inert gas blows onto the surface of the rotating fan blades, and the support shaft is used to support the rotation of the rotating fan blades, so that the rotating fan blades rotate after being subjected to the blowing force, and the cooling inert gas can be spread, so that the cooling inert gas is evenly filled in the interior of the cooling chamber. The rotating airflow can cover a larger area, reduce cooling blind spots, avoid local overheating, thereby ensuring that the temperature of each part of the cooled object drops evenly and improving the consistency of the cooling effect.

[0015] Preferably, a gas guide mechanism is installed on the inner wall of the cooling chamber, and the gas guide mechanism includes a guide plate, the edge of the guide plate surface is fixedly connected to the inner wall of the cooling chamber, a through hole is opened on the curved surface of the outer side of the guide plate, the bottom of the guide plate is fixedly connected to a connecting round rod, the bottom end of the connecting round rod is fixedly connected to a conical guide cylinder, and the inner cavity of the conical guide cylinder is fixedly connected to a baffle. As the cooling inert gas is discharged from the air nozzle and guided by the spiral guide plate, the cooling inert gas is accelerated to flow in a spiral shape, and the guidance of the guide plate is used to make the cooling inert gas blow toward the cooled object, so that the cooling inert gas is in full contact with the cooled object, so that the heat transfer efficiency is high, the heat dissipation is accelerated, and part of the gas passes through the through hole, so that the gas flow is smooth.

[0016] Preferably, the guide plate is spiral, and the central axis in the middle of the guide plate coincides with the central axis in the middle of the cooling chamber, the through holes are evenly distributed on the curved surface outside the guide plate, there are four connecting round rods, and the four connecting round rods are evenly distributed at the bottom of the guide plate.

[0017] As the gas flows downward, it enters the top of the conical guide cylinder and enters the interior, and is blocked by the baffle plates, which are evenly distributed inside the conical guide cylinder, so that the inlet and outlet of the conical guide cylinder present a porous honeycomb shape, increasing the contact area between the gas and the conical guide cylinder and the baffle plates, promoting the dissipation of heat, and by gradually reducing the diameter of the conical guide cylinder from top to bottom, the flow rate of the gas can be increased after the gas enters the conical guide cylinder, further accelerating the discharge of heat.

[0018] Preferably, the diameter of the tapered guide cylinder gradually decreases from top to bottom, the baffles are evenly distributed in the inner cavity of the tapered guide cylinder, and the tapered guide cylinder is installed directly below the guide vane.

[0019] The top of the disc is fixedly connected with a disk, and the edge of the top of the disc is fixedly installed, and the top of the disc extends into the interior of the furnace body. A runner tube is installed at the top of the disc, and a sprue sleeve is installed at the top of the runner tube. By contraction of the telescopic end of the hydraulic cylinder, an upward pulling force can be applied to the bottom end of the inverted T-shaped connecting rod, and under the support and guidance of the inverted T-shaped connecting rod, the disc and the blade mold are driven upward together, so that the blade mold is inside the furnace body, so that the heating temperature of the blade mold can be increased, and molten metal is injected into the blade mold from the sprue sleeve to form the blade.

[0020] Preferably, the inverted T-shaped connecting rod is installed vertically, the hydraulic cylinder is installed vertically, there are two hydraulic cylinders, and the two hydraulic cylinders are installed symmetrically along the inverted T-shaped connecting rod.

[0021] When the molten metal is injected into the blade, the hydraulic cylinder can be opened again to work. By extending the telescopic end of the hydraulic cylinder, a downward pushing force can be applied to the bottom end of the inverted T-shaped connecting rod, so that the inverted T-shaped connecting rod can be moved downward, and the disc and the blade mold can be moved downward together, so that the position of the blade mold can be adjusted so that the blade mold is inside the cooling chamber, which is convenient for subsequent cooling of the blade mold.

[0022] Preferably, there are four blade molds, and the four blade molds are evenly distributed on the sides of the top of the disc, and the gate sleeve is installed directly above the disc.

[0023] The present invention provides a gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle. It has the following beneficial effects:

[0024] 1. The gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle sucks out the cooling inert gas in the cooling chamber from the air suction port through the suction port of the vacuum pump and transports it to the first gas storage tank. The gas is pressurized by the booster pump, so that the gas enters the interior of the heat exchanger, heat exchange and temperature reduction of the gas is carried out, and the gas enters the interior of the second gas storage tank. The gas flow is controlled by the flow regulating valve, so that the inert gas can enter the interior of the circular air channel and be blown into the interior of the cooling chamber from the air nozzle, thereby performing directional blowing. The suction and air ejection are repeated in this way to achieve cooling.

[0025] Second, the gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle has an air nozzle installed at an angle, so that the cooling inert gas blown out by the air nozzle presents a swirl shape, and the cooling inert gas is blown diagonally downward to cool the material in the cooling chamber. In addition, by evenly installing the air nozzles on the inner side of the circular air duct, multiple air nozzles can be used to blow air together, thereby increasing the exhaust volume of the cooling inert gas, which further helps to cool the material.

[0026] 3. The gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle blows gas out from the air nozzle, and the cooling inert gas is blown onto the surface of the rotating fan blades. The rotating fan blades are supported by the support shaft, so that the rotating fan blades rotate after being subjected to the blowing force, and the cooling inert gas can be spread, so that the cooling inert gas is evenly filled in the interior of the cooling chamber. The rotating airflow can cover a larger area, reduce cooling blind spots, and avoid local overheating, thereby ensuring that the temperature of each part of the cooled object drops evenly and improving the consistency of the cooling effect.

[0027] 4. The gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle accelerates the cooling inert gas to flow in a spiral shape as the cooling inert gas is discharged from the air nozzle and guided by the spiral guide vane. The cooling inert gas is guided by the guide vane to blow toward the cooled object, so that the cooling inert gas is in full contact with the cooled object, resulting in high heat transfer efficiency and accelerated heat dissipation. In addition, part of the gas passes through the through hole, which makes the gas flow smooth.

[0028] 5. The gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle allows the gas to enter the top of the conical guide cylinder and enter the interior as the gas flows downward, and is blocked by the baffle plate, and the baffle plate is evenly distributed inside the conical guide cylinder, so that the inlet and outlet of the conical guide cylinder present a porous honeycomb shape, increasing the contact area between the gas and the conical guide cylinder and the baffle plate, promoting the dissipation of heat, and by gradually reducing the diameter of the conical guide cylinder from top to bottom, the gas flow rate can be increased after entering the conical guide cylinder, further accelerating the discharge of heat.

[0029] 6. The gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle utilizes the contraction of the telescopic end of the hydraulic cylinder to apply an upward pulling force to the bottom end of the inverted T-shaped connecting rod. Under the support and guidance of the inverted T-shaped connecting rod, the disc and the blade mold are driven upward together, so that the blade mold is located inside the furnace body, which can increase the temperature of the blade mold and inject molten metal into the blade mold from the gate sleeve to form the blade.

[0030] 7. The gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle utilizes the extension of the telescopic end of the hydraulic cylinder to apply a downward pushing force to the bottom end of the inverted T-shaped connecting rod, so that the inverted T-shaped connecting rod can move downward and drive the disc and the blade mold to move downward together, so that the position of the blade mold can be adjusted so that the blade mold is inside the cooling chamber, which is convenient for subsequent cooling of the blade mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the gas cooling system of the vacuum directional solidification furnace based on the pressure gradient principle of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of a gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to the present invention, viewed from above;

[0033] Figure 3 Schematic diagram of the connection structure between the cooling mechanism and the cooling chamber of the present invention;

[0034] Figure 4 This is a schematic diagram of the overall structure of the cooling mechanism of the present invention;

[0035] Figure 5 This is a schematic diagram of the overall structure of the jet assembly of the present invention;

[0036] Figure 6 Schematic diagram of the connection structure between the gas guide mechanism and the cooling chamber of the present invention;

[0037] Figure 7 Schematic diagram of the overall structure of the gas guide mechanism of the present invention;

[0038] Figure 8 It is a schematic diagram of the connection structure between the traction mechanism and the cooling chamber of the present invention;

[0039] Figure 9 It is a schematic diagram of the overall structure of the traction mechanism of the present invention.

[0040] In the figure: 1. furnace body; 2. cooling chamber; 3. cooling mechanism; 4. gas guide mechanism; 5. traction mechanism; 31. exhaust port; 32. first gas storage tank; 33. second gas storage tank; 34. vacuum pump; 35. booster pump; 36. heat exchanger; 37. flow regulating valve; 38. jet assembly; 381. circular air duct; 382. jet nozzle; 383. support shaft; 384. rotating fan blade; 41. guide vane; 42. through hole; 43. connecting round rod; 44. tapered guide cylinder; 45. baffle; 51. inverted T-shaped connecting rod; 52. hydraulic cylinder; 53. disc; 54. blade mold; 55. runner tube; 56. gate sleeve. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] The first embodiment, as Figures 1 to 5 As shown, the present invention provides a technical solution:

[0043] A gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle, comprising:

[0044] A furnace body 1, and a cooling chamber 2 fixedly installed at the bottom of the furnace body 1;

[0045] The cooling mechanism 3 is used to blow the gas in a circular and directional manner and cool the blades. The cooling mechanism 3 is installed outside the cooling chamber 2;

[0046] The cooling mechanism 3 includes an air extraction port 31, a first air storage tank 32, and a second air storage tank 33. The air extraction port 31 is sealed and installed at the bottom of the cooling chamber 2. A vacuum pump 34 is installed between the surface of the first air storage tank 32 and the side of the bottom of the air extraction port 31. A booster pump 35 is installed on the surface of the first air storage tank 32 and on a side away from the vacuum pump 34. A heat exchanger 36 is installed between the booster pump 35 and the second air storage tank 33. A flow regulating valve 37 is installed at the air outlet of the second air storage tank 33. An injection assembly 38 is installed at the top position of the inner wall of the cooling chamber 2.

[0047] The air extraction port 31 is in an inverted cone shape as a whole, and the air injection assembly 38 is installed right above the air extraction port 31 .

[0048] The air inlet of the vacuum pump 34 passes through the side of the bottom of the air extraction port 31 and extends into the interior thereof. The first air storage tank 32 and the second air storage tank 33 are installed at the same height.

[0049] The jet assembly 38 includes a circular air channel 381 and an air jet nozzle 382. The annular surface of the circular air channel 381 is fixedly connected to the top position of the inner wall of the cooling chamber 2, and the air inlet of the circular air channel 381 is connected to the air outlet of the flow regulating valve 37. The air jet nozzle 382 is installed on the inner side of the circular air channel 381. The middle of the inner cavity of the air jet nozzle 382 is fixedly connected to the support shaft 383. The outer circular surface of the support shaft 383 is rotatably installed with a rotating fan blade 384. The staff starts the vacuum pump 34 to work, and the air is sucked from the vacuum pump 34 through the suction port of the vacuum pump 34. The cooling inert gas in the cooling chamber 2 is sucked out at the air port 31 and transported to the first air tank 32. The gas is pressurized by the booster pump 35 so that the gas enters the interior of the heat exchanger 36, where the gas is subjected to heat exchange and cooling. The gas then enters the interior of the second air tank 33, and the gas flow is controlled by the flow regulating valve 37 so that the inert gas can enter the interior of the circular air channel 381 and be blown into the interior of the cooling chamber 2 from the air nozzle 382 for directional blowing. The air suction and air ejection are repeated in this way for cooling.

[0050] The air nozzles 382 are installed at an angle. There are six air nozzles 382 , and the six air nozzles 382 are evenly installed on the inner side of the circular air channel 381 . There are four rotating blades 384 , and the four rotating blades 384 are evenly distributed on the outer circumferential surface of the support shaft 383 .

[0051] By tilting the air nozzle 382, the cooling inert gas blown out by the air nozzle 382 is in a swirling shape, and the cooling inert gas is blown obliquely downward, so that the material in the cooling chamber 2 is cooled. By evenly installing the air nozzles 382 on the inner side of the circular air duct 381, multiple air nozzles 382 can be used to blow air together, thereby increasing the exhaust volume of the cooling inert gas, which further helps to cool the material.

[0052] When the cooling inert gas is blown out from the air nozzle 382, the cooling inert gas blows onto the surface of the rotating fan blade 384, and the support shaft 383 supports the rotation of the rotating fan blade 384, so that the rotating fan blade 384 rotates after receiving the blowing force, and the cooling inert gas can be spread, so that the cooling inert gas is evenly filled in the interior of the cooling chamber 2, and the rotating airflow can cover a larger area.

[0053] The second embodiment, based on the first embodiment, see Figures 1 to 7 As shown:

[0054] A gas guide mechanism 4 is installed on the inner wall of the cooling chamber 2. The gas guide mechanism 4 includes a guide plate 41. The edge of the surface of the guide plate 41 is fixedly connected to the inner wall of the cooling chamber 2. A through hole 42 is opened on the curved surface on the outer side of the guide plate 41. The bottom of the guide plate 41 is fixedly connected to a connecting round rod 43. The bottom end of the connecting round rod 43 is fixedly connected to a conical guide cylinder 44. The inner cavity of the conical guide cylinder 44 is fixedly connected to a baffle 45. As the cooling inert gas is discharged from the air nozzle 382 and guided by the spiral guide plate 41, the cooling inert gas is accelerated to flow in a spiral shape. The guidance of the guide plate 41 is used to make the cooling inert gas blow toward the cooled object, so that the cooling inert gas is in full contact with the cooled object, so that the heat transfer efficiency is high, the heat dissipation is accelerated, and part of the gas passes through the through hole 42, and the gas flows smoothly.

[0055] The guide vane 41 is spiral, and the central axis of the middle of the guide vane 41 coincides with the central axis of the middle of the cooling chamber 2. The through holes 42 are evenly distributed on the curved surface outside the guide vane 41. There are four connecting rods 43, and the four connecting rods 43 are evenly distributed at the bottom of the guide vane 41.

[0056] As the gas flows downward, it enters the top of the conical guide cylinder 44 and enters the interior. Under the isolation of the baffle plate 45, and the baffle plate 45 is evenly distributed inside the conical guide cylinder 44, the inlet and outlet of the conical guide cylinder 44 presents a porous honeycomb shape, which increases the contact area between the gas and the conical guide cylinder 44 and the baffle plate 45, promotes the dissipation of heat, and utilizes the conical guide cylinder 44 to gradually reduce its diameter from top to bottom, so that after the gas enters the conical guide cylinder 44, the flow rate of the gas can be increased.

[0057] The diameter of the tapered guide cylinder 44 gradually decreases from top to bottom. The baffles 45 are evenly distributed in the inner cavity of the tapered guide cylinder 44 . The tapered guide cylinder 44 is installed directly below the guide vane 41 .

[0058] The third embodiment, based on the first and second embodiments, see Figures 1 to 9 As shown:

[0059] A traction mechanism 5 is installed at the center of the cooling chamber 2. The traction mechanism 5 includes an inverted T-shaped connecting rod 51 and a hydraulic cylinder 52. The outer surface of the inverted T-shaped connecting rod 51 is slidably installed in the middle of the bottom of the exhaust port 31. The hydraulic cylinder 52 is fixedly installed on the side of the bottom of the exhaust port 31. The telescopic end of the hydraulic cylinder 52 is fixedly connected to the side of the bottom end of the inverted T-shaped connecting rod 51. The top of the inverted T-shaped connecting rod 51 is fixedly connected to a disc 53. A blade mold 54 is fixedly installed on the side of the top of the disc 53. The top of the blade mold 54 extends to the inside of the furnace body 1. The blade mold 54 A runner tube 55 is installed at the top of the runner tube 55, and a sprue sleeve 56 is installed at the top of the runner tube 55. The staff starts the hydraulic cylinder 52 to work, and uses the contraction of the telescopic end of the hydraulic cylinder 52 to apply an upward pulling force to the bottom end of the inverted T-shaped connecting rod 51. Under the support and guidance of the inverted T-shaped connecting rod 51, the disc 53 and the blade mold 54 are driven to move upward together, so that the blade mold 54 is inside the furnace body 1, which can increase the temperature of the blade mold 54 and inject molten metal into the blade mold 54 from the sprue sleeve 56 to form the blade.

[0060] The inverted T-shaped connecting rod 51 is installed vertically, and the hydraulic cylinder 52 is installed vertically. There are two hydraulic cylinders 52 , and the two hydraulic cylinders 52 are installed symmetrically along the inverted T-shaped connecting rod 51 .

[0061] When the molten metal is injected into the blade, the hydraulic cylinder 52 can be started again to work. By extending the telescopic end of the hydraulic cylinder 52, a downward pushing force can be applied to the bottom end of the inverted T-shaped connecting rod 51, so that the inverted T-shaped connecting rod 51 can be moved downward, and the disc 53 and the blade mold 54 can be moved downward together, so that the position of the blade mold 54 can be adjusted so that the blade mold 54 is inside the cooling chamber 2, which is convenient for the subsequent cooling of the blade mold 54.

[0062] There are four blade molds 54 , and the four blade molds 54 are evenly distributed on the sides of the top of the disc 53 , and the gate bushing 56 is installed right above the disc 53 .

[0063] When in use, the staff first starts the hydraulic cylinder 52 to work. By using the contraction of the telescopic end of the hydraulic cylinder 52, an upward pulling force can be applied to the bottom end of the inverted T-shaped connecting rod 51. Under the support and guidance of the inverted T-shaped connecting rod 51, the disc 53 and the blade mold 54 are driven to move upward together, so that the blade mold 54 is inside the furnace body 1. This can increase the temperature of the blade mold 54, and inject molten metal into the blade mold 54 from the sprue sleeve 56 to form the blade;

[0064] When the injection of the molten metal into the blade is completed, the hydraulic cylinder 52 can be opened again to work. By extending the telescopic end of the hydraulic cylinder 52, a downward pushing force can be applied to the bottom end of the inverted T-shaped connecting rod 51, so that the inverted T-shaped connecting rod 51 can be moved downward, and the disc 53 and the blade mold 54 can be moved downward together, so that the position of the blade mold 54 can be adjusted so that the blade mold 54 is inside the cooling chamber 2;

[0065] At this time, the staff starts the vacuum pump 34 to work, and sucks the cooling inert gas in the cooling chamber 2 from the air outlet 31 through the air intake of the vacuum pump 34 and transports it to the first air storage tank 32. The gas is then pressurized by the booster pump 35, allowing the gas to enter the interior of the heat exchanger 36, where it is subjected to heat exchange and temperature reduction. The gas is then allowed to enter the interior of the second air storage tank 33, and the gas flow is controlled by the flow regulating valve 37, so that the inert gas can enter the interior of the circular air channel 381 and be blown into the interior of the cooling chamber 2 from the air nozzle 382 for directional blowing. The air intake and air ejection are repeated in this cycle to cool the air.

[0066] Furthermore, the air nozzles 382 are installed at an angle, so that the cooling inert gas blown out by the air nozzles 382 presents a swirl shape, and the cooling inert gas is blown obliquely downward, thereby cooling the material in the cooling chamber 2. Furthermore, the air nozzles 382 are evenly installed on the inner side of the circular air channel 381, so that multiple air nozzles 382 can be used to blow air together, thereby increasing the exhaust volume of the cooling inert gas, further contributing to the cooling of the material.

[0067] When the cooling inert gas is blown out from the air nozzle 382, the cooling inert gas blows onto the surface of the rotating blade 384. The rotating blade 384 is supported by the support shaft 383, so that the rotating blade 384 rotates after receiving the blowing force, thereby spreading the cooling inert gas, so that the cooling inert gas is evenly filled in the interior of the cooling chamber 2, and the rotating airflow can cover a larger area.

[0068] Furthermore, as the cooling inert gas is discharged from the air nozzle 382 and guided by the spiral guide vane 41, the cooling inert gas is accelerated to flow in a spiral shape. The guide vane 41 guides the cooling inert gas so that the cooling inert gas is blown toward the object to be cooled, so that the cooling inert gas fully contacts the object to be cooled, thereby increasing the heat transfer efficiency and accelerating the heat dissipation. In addition, part of the gas passes through the through hole 42, and the gas flows smoothly.

[0069] As the gas flows downward, it enters the top of the conical guide tube 44 and enters the interior. Under the isolation of the baffle plate 45, and the baffle plate 45 is evenly distributed inside the conical guide tube 44, the inlet and outlet of the conical guide tube 44 present a porous honeycomb shape, which increases the contact area between the gas and the conical guide tube 44 and the baffle plate 45, promotes the dissipation of heat, and uses the conical guide tube 44 to gradually reduce its diameter from top to bottom, so that after the gas enters the conical guide tube 44, the flow rate of the gas is increased, which promotes the removal of heat.

[0070] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0071] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle, characterized in that: include: A furnace body (1), and a cooling chamber (2) fixedly mounted on the bottom of the furnace body (1); A cooling mechanism (3), the cooling mechanism (3) is used to blow the gas in a circular and directionally manner and cool the blades, and the cooling mechanism (3) is installed outside the cooling chamber (2); The cooling mechanism (3) comprises an air extraction port (31), a first air storage tank (32) and a second air storage tank (33); the air extraction port (31) is sealed and installed at the bottom of the cooling chamber (2); a vacuum pump (34) is installed between the surface of the first air storage tank (32) and the side of the bottom of the air extraction port (31); a booster pump (35) is installed on the surface of the first air storage tank (32) and on a side away from the vacuum pump (34); a heat exchanger (36) is installed between the booster pump (35) and the second air storage tank (33); a flow regulating valve (37) is installed at the air outlet of the second air storage tank (33); and an injection assembly (38) is installed at the top position of the inner wall of the cooling chamber (2); The jet assembly (38) includes a circular air duct (381) and an air jet nozzle (382). The annular surface of the circular air duct (381) is fixedly connected to the top position of the inner wall of the cooling chamber (2), and the air inlet of the circular air duct (381) is connected to the air outlet of the flow regulating valve (37). The air jet nozzle (382) is installed on the inner side surface of the circular air duct (381). A support shaft (383) is fixedly connected to the middle of the inner cavity of the air jet nozzle (382). The outer circular surface of the support shaft (383) is rotatably mounted with a rotating fan blade (384).

2. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 1, characterized in that: The air extraction port (31) is in an inverted cone shape as a whole, and the air injection assembly (38) is installed directly above the air extraction port (31).

3. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 1, characterized in that: The air inlet of the vacuum pump (34) passes through the side of the bottom of the air extraction port (31) and extends into the interior thereof. The first air storage tank (32) and the second air storage tank (33) are installed at the same height.

4. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 1, characterized in that: The air nozzles (382) are installed at an angle, there are six air nozzles (382), and the six air nozzles (382) are evenly installed on the inner side of the circular air duct (381), and there are four rotating fan blades (384), and the four rotating fan blades (384) are evenly distributed on the outer circular surface of the support shaft (383).

5. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 1, characterized in that: A gas guide mechanism (4) is installed on the inner wall of the cooling chamber (2), and the gas guide mechanism (4) includes a guide plate (41). The edge of the surface of the guide plate (41) is fixedly connected to the inner wall of the cooling chamber (2). A through hole (42) is provided on the curved surface outside the guide plate (41). The bottom of the guide plate (41) is fixedly connected to a connecting rod (43). The bottom end of the connecting rod (43) is fixedly connected to a tapered guide cylinder (44). The inner cavity of the tapered guide cylinder (44) is fixedly connected to a baffle plate (45).

6. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 5, characterized in that: The guide plate (41) is spiral-shaped, and the central axis of the guide plate (41) coincides with the central axis of the cooling chamber (2). The through holes (42) are evenly distributed on the curved surface outside the guide plate (41). There are four connecting rods (43), and the four connecting rods (43) are evenly distributed on the bottom of the guide plate (41).

7. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 5, characterized in that: The diameter of the tapered guide cylinder (44) gradually decreases from top to bottom, and the baffles (45) are evenly distributed in the inner cavity of the tapered guide cylinder (44). The tapered guide cylinder (44) is installed directly below the guide plate (41).

8. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 1, characterized in that: A traction mechanism (5) is installed at the center of the cooling chamber (2), and the traction mechanism (5) includes an inverted T-shaped connecting rod (51) and a hydraulic cylinder (52). The outer circular surface of the inverted T-shaped connecting rod (51) is slidably installed in the middle of the bottom of the exhaust port (31). The hydraulic cylinder (52) is fixedly installed at the side of the bottom of the exhaust port (31). The telescopic end of the hydraulic cylinder (52) is fixedly connected to the side of the bottom end of the inverted T-shaped connecting rod (51). The top of the inverted T-shaped connecting rod (51) is fixedly connected to a disk (53). A blade mold (54) is fixedly installed at the side of the top of the disk (53). The top of the blade mold (54) extends to the inside of the furnace body (1). A runner tube (55) is installed at the top of the runner tube (55). A gate sleeve (56) is installed at the top of the runner tube (55).

9. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 8, characterized in that: The inverted T-shaped connecting rod (51) is installed vertically, and the hydraulic cylinder (52) is installed vertically. There are two hydraulic cylinders (52), and the two hydraulic cylinders (52) are installed symmetrically along the inverted T-shaped connecting rod (51).

10. The gas cooling system for a vacuum directional solidification furnace based on the pressure gradient principle according to claim 8, characterized in that: There are four blade molds (54), and the four blade molds (54) are evenly distributed on the sides of the top of the disc (53), and the gate sleeve (56) is installed directly above the disc (53).

Images