Aircraft engine blade casting mold shell roasting furnace capable of controlling cooling speed

Abstract

The utility model discloses an aircraft engine blade casting mold shell roasting furnace capable of controlling the cooling speed. The roasting furnace comprises a furnace body, an air inlet fan, an air exhaust fan, an air inlet main pipe communicated with an air outlet of the air inlet fan, a plurality of air inlet branch pipes communicated with the air inlet main pipe and an inner cavity of the furnace body, an air exhaust pipe communicated with an air suction opening of the air exhaust fan, and an air exhaust valve arranged on the air exhaust pipe and used for controlling the air exhaust pipe to be opened or closed. The exhaust fan is arranged on the furnace body, the labyrinth exhaust port is arranged on the furnace body, one end of the exhaust pipe is communicated with the exhaust inlet of the exhaust fan, and the other end of the exhaust pipe is communicated with the labyrinth exhaust port; the roasting furnace further comprises a temperature sensor arranged in the furnace body and used for detecting the temperature in the furnace, and a main control unit arranged outside the furnace body, electrically connected with the temperature sensor and used for controlling the rotating frequency of the air inlet fan and the air exhaust fan.

Description

Technical Field

[0001] The utility model relates to a roasting furnace, and more specifically, to a roasting furnace for a casting mold shell of an aero-engine blade with a controllable cooling rate. Background Art

[0002] In the production process of casting film shells for aero-engine blades, a roasting furnace is required for roasting. For the roasting furnace of the casting film shell of an aero-engine blade, after the film shell is roasted, it is necessary to precisely control the cooling rate to prevent abnormal conditions such as deformation of the film shell during the cooling process.

[0003] Most of the existing cooling methods directly use a blower for cooling, which cannot precisely control the cooling of the film shell, and the uneven air supply of the blower easily causes inconsistent cooling rates at different parts of the film shell, resulting in damage to the film shell. Summary of the Utility Model

[0004] The utility model aims at the above-mentioned defects of the prior art and provides a roasting furnace for a casting mold shell of an aero-engine blade with a controllable cooling rate.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to construct a roasting furnace for a casting mold shell of an aero-engine blade with a controllable cooling rate, which includes a furnace body, an intake blower, an exhaust blower, an intake main pipe communicated with the air outlet of the intake blower, multiple intake branch pipes communicating the intake main pipe and the inner cavity of the furnace body, an exhaust pipe communicated with the suction port of the exhaust blower, an exhaust valve arranged on the exhaust pipe for controlling the opening or closing of the exhaust pipe, and a labyrinth exhaust port arranged on the furnace body. One end of the exhaust pipe is communicated with the suction port of the exhaust blower, and the other end of the exhaust pipe is communicated with the labyrinth exhaust port;

[0006] The roasting furnace further includes a temperature sensor arranged inside the furnace body for detecting the temperature inside the furnace, and a main control unit arranged outside the furnace body and electrically connected to the temperature sensor for controlling the rotation frequencies of the intake blower and the exhaust blower.

[0007] In the roasting furnace for a casting mold shell of an aero-engine blade with a controllable cooling rate of the utility model, the intake main pipe is a straight pipe, and the multiple intake branch pipes are all perpendicularly and fixedly connected to the intake main pipe.

[0008] In the roasting furnace for a casting mold shell of an aero-engine blade with a controllable cooling rate of the utility model, the distance between every two adjacent intake branch pipes among the multiple intake branch pipes is the same, and the diameter of the intake branch pipe close to the intake blower among the multiple intake branch pipes is smaller than the diameter of the intake branch pipe far from the intake blower.

[0009] In the baking furnace for the casting mold shell of an aeroengine blade with controllable cooling rate according to the present utility model, the intake main pipe is a conical pipe. One end of the intake main pipe close to the intake fan is the first end, and the other end of the intake main pipe far from the intake fan is the second end. The diameter of the intake main pipe gradually increases from the first end to the second end.

[0010] In the baking furnace for the casting mold shell of an aeroengine blade with controllable cooling rate according to the present utility model, a labyrinth air flow channel is provided in the labyrinth exhaust port.

[0011] In the baking furnace for the casting mold shell of an aeroengine blade with controllable cooling rate according to the present utility model, the labyrinth exhaust port includes a hollow outer shell, an air inlet and an air outlet provided on the outer shell and communicating with the inner cavity, and a first partition plate and a second partition plate provided in the outer shell. A first gap is provided between the first partition plate and the first inner side wall of the outer shell, and a second gap is provided between the second partition plate and the second inner side wall of the outer shell. The air inlet is provided at a position on the first outer side surface of the outer shell and far from the first gap, and the air outlet is provided at a position on the second outer side surface of the outer shell and far from the second gap;

[0012] The air inlet communicates with the inner cavity of the furnace body, and the air outlet communicates with the exhaust pipe.

[0013] Implementing the baking furnace for the casting mold shell of an aeroengine blade with controllable cooling rate according to the present utility model has the following beneficial effects: When using the baking furnace for the casting mold shell of an aeroengine blade with controllable cooling rate according to the present utility model, after the mold shell in the furnace body is baked, start the intake fan and the exhaust fan. The intake fan blows air into the intake main pipe and evenly sends it to each position in the furnace body through multiple intake branch pipes, forming a uniform cooling effect. The air entering the furnace body absorbs heat and then is discharged by the exhaust pipe and the exhaust fan. In this application, by setting the labyrinth exhaust port, the difficulty of air flow outflow can be increased, so that the air flow circulates and absorbs heat more fully in the furnace body and discharges the heat. By setting the temperature sensor and the main control unit, the temperature sensor real-time detects the temperature in the furnace body. When the temperature in the furnace body drops too fast, the main control unit controls the intake fan and the exhaust fan to reduce the rotation frequency. When the temperature in the furnace body drops too slowly, the main control unit controls the intake fan and the exhaust fan to increase the rotation frequency, so as to achieve the purpose of precise control of the temperature reduction in the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following will further illustrate the present utility model in conjunction with the drawings. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the first embodiment of the baking furnace for the casting mold shell of an aeroengine blade with controllable cooling rate according to the present utility model;

[0016] Figure 2It is a schematic structural diagram of the second embodiment of the baking furnace for the aero-engine blade casting mold shell with controllable cooling rate of the present utility model;

[0017] Figure 3 It is a schematic structural diagram of the labyrinth exhaust port in the baking furnace for the aero-engine blade casting mold shell with controllable cooling rate of the present utility model. Specific embodiments

[0018] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will further describe in detail the embodiments of the present utility model with reference to the accompanying drawings.

[0019] As Figures 1-3 shown, in the first embodiment of the baking furnace for the aero-engine blade casting mold shell with controllable cooling rate of the present utility model, the baking furnace 10 includes a furnace body 11, an intake air blower 12, an exhaust air blower 13, an intake main pipe 14 communicated with the air outlet of the intake air blower 12, a plurality of intake branch pipes 15 communicating the intake main pipe 14 and the inner cavity of the furnace body 11, an exhaust pipe 16 communicated with the suction port of the exhaust air blower 13, an exhaust valve 17 provided on the exhaust pipe 16 for controlling the opening or closing of the exhaust pipe 16, and a labyrinth exhaust port 18 provided on the furnace body 11. One end of the exhaust pipe 16 is communicated with the suction port of the exhaust air blower 13, and the other end of the exhaust pipe 16 is communicated with the labyrinth exhaust port 18.

[0020] The baking furnace 10 further includes a temperature sensor provided in the furnace body 11 for detecting the temperature inside the furnace, and a main control unit provided outside the furnace body 11 and electrically connected to the temperature sensor for controlling the rotation frequencies of the intake air blower 12 and the exhaust air blower 13.

[0021] When using the baking furnace for the aero-engine blade casting mold shell with controllable cooling rate of the present utility model, after the mold shell in the furnace body 11 is baked, start the intake air blower 12 and the exhaust air blower 13. The intake air blower 12 blows air into the intake main pipe 14 and evenly sends it to each position inside the furnace body 11 through a plurality of intake branch pipes 15, forming an effect of uniform cooling. The air entering the furnace body 11 absorbs heat and then is discharged by the exhaust pipe 16 and the exhaust air blower 13. In this application, by providing the labyrinth exhaust port 18, the difficulty of air flow outflow can be increased, so that the air flow circulates and absorbs heat more fully inside the furnace body 11 and discharges the heat. By providing the temperature sensor and the main control unit, the temperature sensor continuously detects the temperature inside the furnace body 11. When the temperature inside the furnace body 11 drops too fast, the main control unit controls the intake air blower 12 and the exhaust air blower 13 to reduce the rotation frequencies. When the temperature inside the furnace body 11 drops too slowly, the main control unit controls the intake air blower 12 and the exhaust air blower 13 to increase the rotation frequencies, thereby achieving the purpose of precise control of the temperature drop inside the furnace body 11.

[0022] As Figure 1As shown, in the first embodiment, the intake main pipe 14 is a straight pipe, and the multiple intake branch pipes 15 are all perpendicularly and fixedly connected to the intake main pipe 14.

[0023] Preferably, the distance between every two adjacent intake branch pipes 15 among the multiple intake branch pipes 15 is the same, and the diameter of the intake branch pipe 15 closer to the intake fan 12 among the multiple intake branch pipes 15 is smaller than the diameter of the intake branch pipe 15 farther from the intake fan 12.

[0024] During the process of the intake fan 12 blowing air into the intake main pipe 14, since the wind force gradually decreases along the intake main pipe 14, by setting intake branch pipes 15 with different diameters, such that the diameter of the intake branch pipe 15 closer to the intake fan 12 is smaller than the diameter of the intake branch pipe 15 farther from the intake fan 12, it can enable the air flow to enter the furnace body 11 from different intake branch pipes 15 more evenly or in equal amounts, achieving the purpose of uniformly cooling each area.

[0025] As Figure 2 shown, in the second embodiment, the intake main pipe 14 is a conical pipe. The end of the intake main pipe 14 closer to the intake fan 12 is the first end, and the end of the intake main pipe 14 farther from the intake fan 12 is the second end. The diameter of the intake main pipe 14 gradually increases from the first end to the second end.

[0026] Similarly, since the diameter of the first end of the intake main pipe 14 is smaller than that of the second end, it can prevent the air flow from concentrating on entering the furnace body 11 from the first intake branch pipe 15, and is more conducive to the air flow flowing from the first end to the second end of the intake main pipe 14, achieving the purpose of uniformly cooling each area inside the furnace body 11.

[0027] Specifically, a labyrinth air flow channel is provided inside the labyrinth exhaust port 18.

[0028] As Figure 3 shown, the labyrinth exhaust port 18 includes a hollow outer shell 19, an air inlet 20 and an air outlet 21 provided on the outer shell 19 and communicating with the inner cavity, and a first partition 22 and a second partition 23 provided inside the outer shell 19. A first gap 24 is provided between the first partition 22 and the first inner side wall of the outer shell 19, and a second gap 25 is provided between the second partition 23 and the second inner side wall of the outer shell 19. The air inlet 20 is provided at a position on the first outer side surface of the outer shell 19 and far from the first gap 24, and the air outlet 21 is provided at a position on the second outer side surface of the outer shell 19 and far from the second gap 25. The air inlet 20 communicates with the inner cavity of the furnace body 11, and the air outlet 21 communicates with the exhaust pipe 16.

[0029] During the exhaust process, the gas in the furnace body 11 needs to flow along the labyrinth air flow channel, which can prevent the gas blown into the furnace body 11 from being directly extracted by the exhaust fan 13, increasing the difficulty of gas discharge, enabling the gas to fully flow in the furnace body 11 and achieving a better cooling effect.

[0030] In addition, in the present utility model, unless otherwise clearly defined and limited, terms such as "connected", "connected to", "stacked", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A roasting furnace for a casting mold shell of an aero-engine blade with a controllable cooling rate, characterized in that, The roasting furnace includes a furnace body, an intake air blower, an exhaust air blower, an intake main pipe communicated with the air outlet of the intake air blower, a plurality of intake branch pipes communicating the intake main pipe and the inner cavity of the furnace body, an exhaust pipe communicated with the suction port of the exhaust air blower, an exhaust valve provided on the exhaust pipe for controlling the conduction or closing of the exhaust pipe, and a labyrinth exhaust port provided on the furnace body. One end of the exhaust pipe is communicated with the suction port of the exhaust air blower, and the other end of the exhaust pipe is communicated with the labyrinth exhaust port; The roasting furnace further includes a temperature sensor provided in the furnace body for detecting the temperature in the furnace, and a main control unit provided outside the furnace body and electrically connected to the temperature sensor for controlling the rotation frequencies of the intake air blower and the exhaust air blower.

2. The shell baking furnace for aeroengine blade casting with controllable cooling rate according to claim 1, wherein The intake main pipe is a straight pipe, and the plurality of intake branch pipes are all perpendicularly and fixedly connected to the intake main pipe.

3. The controllable cooling rate aero-engine blade casting mold shell roasting furnace according to claim 2, characterized in that The distances between every two adjacent intake branch pipes among the plurality of intake branch pipes are the same, and the diameter of the intake branch pipe close to the intake air blower among the plurality of intake branch pipes is smaller than the diameter of the intake branch pipe far from the intake air blower.

4. The roasting furnace for the casting mold shell of the aero-engine blade with controllable cooling rate according to claim 3, characterized in that, The intake main pipe is a conical pipe. One end of the intake main pipe close to the intake air blower is the first end, and the other end of the intake main pipe far from the intake air blower is the second end. The diameter of the intake main pipe gradually increases from the first end to the second end.

5. The controllable cooling rate aero-engine blade casting mold shell roasting furnace according to claim 1, characterized in that, A labyrinth air flow channel is provided in the labyrinth exhaust port.

6. The roasting furnace for the casting mold shell of an aero-engine blade with a controllable cooling rate according to claim 5, characterized in that, The labyrinth exhaust port includes a hollow outer shell, an air inlet and an air outlet provided on the outer shell and communicated with the inner cavity, and a first partition plate and a second partition plate provided in the outer shell. A first gap is provided between the first partition plate and the first inner side wall of the outer shell, and a second gap is provided between the second partition plate and the second inner side wall of the outer shell. The air inlet is provided at a position on the first outer side surface of the outer shell and far from the first gap, and the air outlet is provided at a position on the second outer side surface of the outer shell and far from the second gap; The air inlet is communicated with the inner cavity of the furnace body, and the air outlet is communicated with the exhaust pipe.

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