An apparatus for controlling the cooling rate in a turbine solidification process

Abstract

This utility model belongs to the technical field of cooling rate control devices, and discloses a device for controlling the cooling rate during turbine solidification. It includes a base with a bearing block on top and a support frame mounted on top of the base; a rotating platform mounted on the base via the support frame, with a rotatable connection between the rotating platform and the support frame; a composite protective pad on top of the rotating platform and an arc-shaped limiting block at the bottom of the rotating platform; the rotating platform being driven by a servo motor; a water mist generator mounted on the base, with a T-shaped mist outlet pipe on top of the water mist generator, and several mist outlets on the T-shaped mist outlet pipe; and three guide fans. This utility model, through the synergistic effect of the rotating platform, water mist generator, and guide fans, can achieve multi-dimensional cooling of the casting while it is rotating, with a short cooling time, and overcomes the contradictions of low efficiency in traditional air cooling and high danger in water spray cooling.

Description

Technical Field

[0001] This utility model relates to the technical field of cooling rate control devices, and in particular to a device for controlling the cooling rate during turbine solidification. Background Technology

[0002] In the solidification manufacturing process of turbines (especially turbine blades), the device for controlling the cooling rate refers to a system of equipment specifically designed to precisely regulate the rate at which the temperature of the liquid metal alloy decreases during solidification. Its core purpose is to achieve active control over the microstructure of the metal (such as grain morphology, size, and orientation) by managing the temperature gradient and cooling rate, thereby optimizing the mechanical properties of the final component (such as high-temperature strength, creep resistance, and fatigue resistance), which is especially crucial for high-temperature components of aero-engines and gas turbines with stringent requirements.

[0003] Existing turbine casting cooling devices are mostly used only to support the castings, keeping them in an air-cooled state during solidification. However, for marine turbines weighing 10-30 kg, the hub is thick and slow to cool, which can easily cause core shrinkage and coarse grains, leading to a decrease in the mechanical properties of the castings. The practice of using water spray for forced cooling is occasionally seen, but it has high safety risks and is difficult to implement under current safety regulations. Some use solid particles such as stainless steel shot or sand as a cooling medium, but the cooling process after the solid medium absorbs heat will bring additional investment, and the temperature of the medium itself is difficult to control. All of these factors make it difficult to promote the solid particle cooling method. Therefore, we propose a device for controlling the cooling rate during turbine solidification. Utility Model Content

[0004] In view of the problems raised in the background art above, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A device for controlling the cooling rate during turbine solidification includes a base, the top of which has an integrally formed support block, and a support frame is mounted on the top of the base.

[0007] A rotating platform is mounted on the base via a support frame, and the rotating platform is rotatably connected to the support frame. The top of the rotating platform is provided with a composite protective pad, and the bottom of the rotating platform has an integrally formed arc-shaped limiting block arranged in a circular array. When in a rotating state, the arc-shaped limiting block rotates in close contact with the outer surface of the support frame. The rotating platform is driven by a servo motor.

[0008] A water mist generator is installed on the base and is located between the bearing block and the support frame. A T-shaped mist outlet pipe is installed on the top of the water mist generator, and several mist outlets are opened on the T-shaped mist outlet pipe, with the mist outlets facing the rotating platform.

[0009] Three guide fans are mounted on the support block and are equidistant from each other along the length of the support block.

[0010] As a technical solution of the device for controlling the cooling rate during turbine solidification according to the present invention, the composite protective pad includes an aluminum silicate fiber core layer disposed on the rotating platform and an alumina fiber cloth layer covering the outside of the aluminum silicate fiber core layer.

[0011] As a technical solution of the device for controlling the cooling rate during the solidification process of a turbine according to the present invention, the servo motor is mounted on the support frame, and the output shaft of the servo motor is connected to the bottom of the rotating platform via a transmission connection. The speed range of the servo motor is - revolutions per minute, and it is steplessly regulated by an external frequency converter.

[0012] As a technical solution for a device for controlling the cooling rate during turbine solidification as described in this utility model, the water mist generator has a mist output of 8-15 kg / h and is arranged at an angle of 15-45° with the central axis of the rotating platform.

[0013] As a technical solution for a device for controlling the cooling rate during turbine solidification as described in this utility model, a plurality of the mist outlets are equidistantly arranged along the length direction of the T-shaped mist outlet pipe.

[0014] As a technical solution for a device for controlling the cooling rate during turbine solidification as described in this utility model, the airflow of the guide fan is 10-30 m³ / h. 3 / min, the wind direction is set coaxially with the atomization direction of the T-shaped mist outlet pipe.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] 1. This utility model, through the synergistic effect of a rotating platform, a water mist generator, and a guide fan, can achieve multi-dimensional cooling of castings in a rotating state with a short cooling time, while overcoming the contradictions of low efficiency of traditional air cooling and high danger of water spray cooling.

[0017] 2. This utility model, through the linkage design of water mist generator and guide fan, utilizes 15-45° angled atomization spray and coaxial wind guidance to effectively cover the thick parts of the turbine hub with water mist, which can improve the cooling rate of the core of the turbine hub. At the same time, the water mist evaporation process complies with the OSHA vapor exposure limit standard. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the diagram: 1. Base; 101. Bearing block; 2. Support frame; 3. Rotating platform; 301. Arc-shaped limiting block; 302. Alumina silicate fiber core layer; 303. Alumina fiber cloth layer; 4. Servo motor; 5. Water mist generator; 6. T-shaped mist outlet pipe; 601. Mist outlet; 7. Guide fan. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-3 A device for controlling the cooling rate during turbine solidification is provided. This device includes a base 1, an integrally formed support block 101 on the top of the base 1, and a support frame 2 installed on the top of the base 1.

[0026] The rotating platform 3 is mounted on the base 1 via the support frame 2, and the rotating platform 3 is rotatably connected to the support frame 2. The top of the rotating platform 3 is provided with a composite protective pad, and the bottom of the rotating platform 3 has an integrally formed arc-shaped limiting block 301 arranged in a circular array. When it is in the rotating state, the arc-shaped limiting block 301 rotates in close contact with the outer surface of the support frame 2. The rotating platform 3 is driven by a servo motor 4.

[0027] Water mist generator 5 is installed on base 1 and is located between support block 101 and support frame 2. A T-shaped mist outlet pipe 6 is installed on the top of water mist generator 5. Several mist outlets 601 are opened on the T-shaped mist outlet pipe 6 and the mist outlets 601 face the rotating platform 3.

[0028] Three guide fans 7 are mounted on the support block 101 and are equidistantly arranged along the length of the support block 101. In application, through the synergistic effect of the rotating platform 3, the water mist generator 5 and the guide fans 7, multi-dimensional cooling of the casting can be achieved in the rotating state. At the same time, the design of the arc-shaped limiting block 301 and the support frame 2 can enhance the stability of rotation and avoid deviation caused by centrifugal force.

[0029] Reference Figure 2 and Figure 3 The composite protective pad includes an aluminum silicate fiber core layer 302 disposed on the rotating platform 3 and an alumina fiber cloth layer 303 covering the outside of the aluminum silicate fiber core layer 302. In application, the composite structure of the aluminum silicate fiber core layer 302 and the alumina fiber cloth layer 303 can withstand the high temperature of the turbine casting above 1000°C, while reducing the risk of thermal deformation of the rotating platform 3, and the protective layer can extend its service life.

[0030] Reference Figure 1 and Figure 2 The servo motor 4 is mounted on the support frame 2, and the output shaft of the servo motor 4 is connected to the bottom of the rotating platform 3 via a transmission connection. The speed range of the servo motor 4 is 5-30 rpm, and it is steplessly speed-regulated by an external frequency converter. In application, the stepless speed regulation function (5-30 rpm) of the servo motor 4 is adapted to the needs of turbine castings of different sizes. For example, a 10kg casting can use 15 rpm, and a 30kg casting can be matched with 8 rpm, so as to achieve a balance control between grain refinement and shrinkage stress.

[0031] Reference Figure 1 and Figure 2 The mist generator 5 has a mist output of 8-15 kg / h and is arranged at an angle of 15-45° with the central axis of the rotating platform 3.

[0032] Several mist outlets 601 are equidistantly arranged along the length of the T-shaped mist outlet pipe 6;

[0033] The airflow of the guide fan 7 is 10-30m³. 3 / min, the wind direction is set coaxially with the atomization direction of the T-shaped mist outlet pipe 6. In application, the linkage design of the water mist generator 5 and the guide fan 7, through the atomization spray at a 15-45° angle and the coaxial wind guidance, enables the water mist to effectively cover the thick part of the turbine hub, which can improve the cooling rate of the core of the turbine hub. At the same time, the water mist evaporation process complies with the OSHA vapor exposure limit standard.

[0034] The working principle of this utility model is as follows: The cast part is placed on a rotating platform 3, and the servo motor 4 fixed on the support frame 2 is started. The output shaft of the servo motor 4 drives the rotating platform 3 to rotate uniformly at a speed of 20 revolutions per minute. Simultaneously, the coordinated design of the arc-shaped limiting block 301 and the support frame 2 enhances the stability of the rotation and prevents deviation caused by centrifugal force. Then, the water mist generator 5 and the guide fan 7 are started. The water mist generator 5 sprays water mist onto the casting at a rate of 10 kg / h, and the guide fan 7 sprays water mist at a rate of 20 m / s. 3 With an airflow of / min directed at the casting, the casting is cooled by water mist and airflow during rotation, achieving multi-dimensional cooling with a short cooling time. This overcomes the contradictions of low efficiency of traditional air cooling and high danger of water spray cooling, and enables multi-dimensional cooling of the casting while it is rotating, with a short cooling time.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An apparatus for controlling the cooling rate in a turbine solidification process, characterized by: include: The base (1) has an integrally formed support block (101) on its top and a support frame (2) is installed on its top. A rotating platform (3) is mounted on the base (1) via the support frame (2), and the rotating platform (3) is rotatably connected to the support frame (2). The top of the rotating platform (3) is provided with a composite protective pad, and the bottom of the rotating platform (3) has an integrally formed arc-shaped limiting block (301) arranged in a circular array. When in a rotating state, the arc-shaped limiting block (301) rotates close to the outer surface of the support frame (2). The rotating platform (3) is driven by a servo motor (4). A water mist generator (5) is installed on the base (1) and is located between the bearing block (101) and the support frame (2). A T-shaped mist outlet pipe (6) is installed on the top of the water mist generator (5). Several mist outlets (601) are opened on the T-shaped mist outlet pipe (6) and the mist outlets (601) face the rotating platform (3). Three guide fans (7) are mounted on the support block (101) and are equidistant from each other along the length of the support block (101).

2. The apparatus for controlling the cooling rate during the turbine solidification process according to claim 1, wherein: The composite protective pad includes an aluminum silicate fiber core layer (302) disposed on the rotating platform (3) and an alumina fiber cloth layer (303) covering the outside of the aluminum silicate fiber core layer (302).

3. The apparatus for controlling the cooling rate during the turbine solidification process according to claim 1, wherein: The servo motor (4) is mounted on the support frame (2), and the output shaft of the servo motor (4) is connected to the bottom of the rotating platform (3) via a transmission connection. The speed range of the servo motor (4) is 5-30 revolutions per minute, and it is steplessly regulated by an external frequency converter.

4. The device for controlling the cooling rate during turbine solidification according to claim 1, characterized in that: The mist generator (5) has a mist output of 8-15 kg / h and is arranged at an angle of 15-45° with the central axis of the rotating platform (3).

5. The device for controlling the cooling rate during turbine solidification according to claim 1, characterized in that: Several of the mist outlets (601) are equidistantly arranged along the length of the T-shaped mist outlet pipe (6).

6. The device for controlling the cooling rate during turbine solidification according to claim 1, characterized in that: The air outlet volume of the guide fan (7) is 10-30 m 3 / min, and the air direction is coaxial with the atomizing direction of the T-shaped mist outlet pipe (6).

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