Disc type electromagnetic induction heating device

Abstract

The utility model discloses a disc type electromagnetic induction heating device, comprising a coil pedestal, the middle part of which is recessed to form an accommodating cavity, and the side wall of the accommodating cavity is provided with a coil inlet and a coil outlet; one end of the induction coil is located at the coil inlet, and the other end of the induction coil is located at the coil outlet; the Teflon high-temperature cloth is positioned in the accommodating cavity and covers the induction coil; the plurality of cushion blocks are placed on the Teflon high-temperature cloth; the heating box is connected with the two ends of the induction coils, and based on the electromagnetic induction heating principle, an alternating magnetic field is generated through the induction coils distributed in a disc shape, so that eddy currents are generated in the metal disc parts to generate heat.

Description

Technical Field

[0001] This utility model relates to the field of induction heating technology, specifically to a disc-type electromagnetic induction heating device. Background Technology

[0002] The ratchet discs and gear discs of turbine rotor shaft systems mostly employ a large interference fit assembly design. Traditionally, the workshop has used two methods: 1. Flame heating to expand the inner holes of these disc-shaped parts before assembly. In today's context of digitalization, high quality, high efficiency, and safety, this method is outdated. 2. Inner hole electromagnetic induction heating, which does not differentiate between the shape characteristics of the parts, but creates a large temperature difference between the inside and outside, affecting the material properties of the parts. Flame heating uses open flames, raising safety concerns, resulting in uncontrollable heating temperatures, slow heating speed, and low efficiency. While inner hole induction heating is electromagnetic induction heating and has a fast heating speed, it also creates a large temperature difference between the inside and outside. In addition, the device is inconvenient to move: currently, it relies on hoisting equipment (such as gantry cranes) to adjust the position, resulting in low operating efficiency and site limitations; it lacks stability: when placing parts, the insufficient or uneven distribution of support points can lead to uneven heating, affecting the heating quality; and the coil is easily damaged: in high-temperature environments, the coil lacks effective protection and is prone to shortening its lifespan due to wear or insulation failure. Therefore, it is urgent to develop a mobile, highly stable, long-life, and safe device that can accurately control the heating temperature and uniformity. Utility Model Content

[0003] To solve the above technical problems, this utility model provides a disc-shaped electromagnetic induction heating device. Based on the principle of electromagnetic induction heating, it generates an alternating magnetic field through disc-shaped distributed induction coils, which causes eddy currents to be generated inside the metal disc-shaped parts, thus generating heat.

[0004] The present invention adopts the following technical solution:

[0005] A disc-shaped electromagnetic induction heating device includes: a coil base with a recessed cavity in the center, the sidewall of which has a coil inlet and a coil outlet; an induction coil disposed within the cavity, one end at the coil inlet and the other end at the coil outlet; a Teflon high-temperature cloth located within the cavity and covering the induction coil; several pads placed on the Teflon high-temperature cloth; and a heating box connected to both ends of the induction coil. The recessed cavity structure of the coil base facilitates the positioning and installation of the coil; the Teflon high-temperature cloth covering the coil provides insulation protection; the ceramic pads form a stable heating support platform, preventing short circuits due to metal contact; and the heating box and coil are connected to form a complete electromagnetic heating circuit, suitable for uniform heating of disc-shaped workpieces.

[0006] Preferably, the bottom of the receiving cavity has a spiral groove for accommodating the induction coil; the spiral groove keeps the induction coil windings in a regular arrangement, ensures uniform magnetic field distribution, and improves heating efficiency; the groove structure restricts coil displacement and enhances operational stability.

[0007] Preferably, the pad consists of three ceramic blocks, which form a three-point support structure to reduce heat conduction while ensuring sufficient support strength. The ceramic material is heat-resistant (>260℃) and insulating, preventing high-temperature deformation and current leakage.

[0008] Preferably, the pads are arranged in an equilateral triangle pattern. This arrangement ensures that the workpiece is subjected to balanced forces, preventing deformation caused by uneven support during heating. The stability of the triangle maximizes the use of the support area, making it suitable for disc-shaped workpieces of different diameters.

[0009] Preferably, the Teflon high-temperature cloth is connected to the receiving cavity by a resin hexagonal head screw. The resin hexagonal head screw has both high temperature resistance (>200℃) and insulation properties, avoiding the formation of eddy current losses. The hexagonal structure facilitates tool fastening and ensures that the high-temperature cloth covers the coil flat.

[0010] Preferably, the coil base is provided with several casters, which enable the device to move flexibly and adapt to different working conditions; the casters with brakes can be fixed in position during heating to ensure operational safety.

[0011] Preferably, the angle between the coil inlet and the side wall of the receiving cavity is 60 degrees; the angle between the coil outlet and the side wall of the receiving cavity is 45 degrees. The 60° inlet angle facilitates natural bending when the coil is introduced, reducing stress concentration; the 45° outlet angle balances the smoothness of the wire exit and the compactness of the structure, facilitating the arrangement of the induction coil.

[0012] Preferably, the coil inlet depth is greater than the coil outlet depth to prevent interference between the induction coil that enters first and the induction coil that enters later.

[0013] Preferably, the wall thickness of the coil base is greater than or equal to 20mm, and the height of the edge baffle is greater than or equal to 100mm. The wall thickness ensures the structural rigidity of the base and resists high-frequency vibration; the baffle height effectively constrains magnetic field leakage and improves energy utilization.

[0014] Preferably, the pad has a diameter of 68mm and a thickness of 15mm, which can provide sufficient support area, take into account both load-bearing capacity and thermal resistance characteristics, and achieve the best balance between support stability and thermal efficiency.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention provides a disc-shaped electromagnetic induction heating device, which generates an alternating magnetic field through a disc-shaped distribution of induction coils, causing eddy currents to be generated inside the metal disc-shaped parts and thus generating heat. Attached Figure Description

[0016] Figure 1 This is a partial structural diagram of a disc-type electromagnetic induction heating device.

[0017] Figure 2 This is a schematic diagram of the coil base.

[0018] Figure 3 This is a schematic diagram of a disc-type electromagnetic induction heating device.

[0019] Figure 4 This is a schematic diagram of the structure of a disc-type electromagnetic induction heating device from another perspective.

[0020] In the diagram, the components are: coil base 1, receiving cavity 1-1, coil inlet 1-2, coil outlet 1-3, spiral groove 1-4, induction coil 2, Teflon high-temperature cloth 3, pad 4, heating box 5, resin hexagonal head screw 6, and caster wheel 7. Detailed Implementation

[0021] To facilitate understanding of the technical solution of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figure 1-4 As shown, a disc-shaped electromagnetic induction heating device includes:

[0024] The coil base 1 has a recessed center forming a receiving cavity 1-1, and the side wall of the receiving cavity 1-1 is provided with a coil inlet 1-2 and a coil outlet 1-3;

[0025] The induction coil 2 is located in the receiving cavity 1-1, with one end located at the coil inlet 1-2 and the other end located at the coil outlet 1-3;

[0026] Teflon high-temperature cloth 3 is located inside the receiving cavity 1-1 and covers the induction coil 2;

[0027] Several pads 4 are placed on Teflon high-temperature cloth 3;

[0028] Heating box 5 is connected to both ends of induction coil 2;

[0029] For ease of representation, the induction coil 2 inside the receiving cavity 1-1 is omitted, while the part of the induction coil 2 connected to the heating box 5 is retained;

[0030] The recessed cavity 1-1 structure of the coil base 1 facilitates the positioning and installation of the coil; the Teflon high-temperature cloth 3 has the characteristics of wear resistance, insulation and high temperature resistance, which protects the heating coil and covers the induction coil 2 to achieve insulation protection; the pad 4 forms a stable heating support platform to avoid metal contact short circuit; the heating box 5 is connected to the induction coil 2 to form a complete electromagnetic heating circuit, which is suitable for uniform heating of disc-shaped workpieces.

[0031] When it is necessary to heat disc-shaped parts, place them horizontally on the pad 4, and then use the induction coil 2 in the coil base 1 to induction heat the disc-shaped parts.

[0032] like Figure 2 As shown, the bottom of the receiving cavity 1-1 has a spiral groove 1-4 for accommodating the induction coil 2; the spiral groove 1-4 keeps the windings of the induction coil 2 in a regular arrangement, ensures uniform magnetic field distribution, and improves heating efficiency; the groove structure restricts the displacement of the induction coil 2 and enhances operational stability.

[0033] The pad 4 consists of three ceramic blocks, which form a three-point support structure to reduce heat conduction while ensuring sufficient support strength. The ceramic material is resistant to high temperatures (>260℃) and is insulating, preventing high-temperature deformation and current leakage.

[0034] The pads 4 are arranged in an equilateral triangle pattern, which ensures that the workpiece is subjected to balanced force and prevents deformation caused by uneven support during heating. The stability of the triangle maximizes the use of the support area and is suitable for disc-type workpieces of different diameters.

[0035] The Teflon high-temperature cloth 3 is connected to the receiving cavity 1-1 by a resin hexagonal head screw 6. The resin hexagonal head screw 6 has both high temperature resistance (>200℃) and insulation properties, avoiding the formation of eddy current losses. The hexagonal structure facilitates tool fastening and ensures that the high-temperature cloth covers the coil flat.

[0036] The coil base 1 is provided with several casters 7. The caster group enables the device to move flexibly, adapt to different working conditions, and is not affected by factors such as fixed site. After heating, it can also be pushed to the target rotor assembly position to reduce the hoisting time of the gantry crane. Preferably, the casters are equipped with brakes, which can fix the position during heating and ensure operational safety.

[0037] like Figure 2 As shown, the angle between the coil inlet 1-2 and the side wall of the receiving cavity 1-1 is 60 degrees; the angle between the coil outlet 1-3 and the side wall of the receiving cavity 1-1 is 45 degrees. The 60° inlet angle facilitates the natural bending of the coil during introduction, reducing stress concentration; the 45° outlet angle balances the smoothness of the wire exit and the compactness of the structure, facilitating the arrangement of the induction coil.

[0038] The coil inlet 1-2 is deeper than the coil outlet 1-3 to prevent interference between the induction coils that enter first and those that enter later. Specifically, the coil inlet 1-2 is 20mm deeper than the coil outlet 1-3.

[0039] The wall thickness of the coil base 1 is greater than or equal to 20mm, the height of the edge baffle is greater than or equal to 100mm, and the center height of the coil base 1 is 82mm. The wall thickness ensures the structural rigidity of the base and resists high-frequency vibration, while the baffle height effectively constrains magnetic field leakage and improves energy utilization.

[0040] The pad 4 has a diameter of 68mm and a thickness of 15mm, which can provide sufficient support area, take into account both load-bearing capacity and thermal resistance characteristics, and achieve the best balance between support stability and thermal efficiency.

[0041] To facilitate the sensing of temperature on disc-shaped parts, temperature sensors can be placed on the disc-shaped parts.

[0042] The above are merely preferred embodiments of this utility model. The scope of protection of this utility model is defined by the scope of the claims. Any improvements and modifications made by those skilled in the art without departing from the spirit and scope of this utility model should also be considered as protection within the scope of this utility model.

Claims

1. A disc-shaped electromagnetic induction heating device, characterized in that, include: The coil base (1) has a recessed cavity (1-1) in the middle, and the side wall of the cavity (1-1) is provided with a coil inlet (1-2) and a coil outlet (1-3); An induction coil (2) is disposed in a receiving cavity (1-1), with one end located at the coil inlet (1-2) and the other end located at the coil outlet (1-3); Teflon high-temperature cloth (3) is located inside the receiving cavity (1-1) and covers the induction coil (2); Several pads (4) are placed on Teflon high-temperature cloth (3); The heating box (5) is connected to both ends of the induction coil (2).

2. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, The bottom of the receiving cavity (1-1) has a spiral groove (1-4) for accommodating the induction coil (2).

3. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, The pad (4) consists of 3 pieces, and the material is ceramic.

4. The disc-shaped electromagnetic induction heating device according to claim 3, characterized in that, The pads (4) are arranged in an equilateral triangle.

5. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, The Teflon high-temperature cloth (3) is connected to the receiving cavity (1-1) by a resin hexagonal head screw (6).

6. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, Several casters (7) are provided below the coil base (1).

7. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, The angle between the coil inlet (1-2) and the side wall of the receiving cavity (1-1) is 60 degrees; the angle between the coil outlet (1-3) and the side wall of the receiving cavity (1-1) is 45 degrees.

8. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, The depth of the coil inlet (1-2) is greater than that of the coil outlet (1-3).

9. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, The wall thickness of the coil base (1) is greater than or equal to 20 mm, and the height of the edge baffle is greater than or equal to 100 mm.

10. The disc-shaped electromagnetic induction heating device according to claim 1, characterized in that, The pad (4) has a diameter of 68 mm and a thickness of 15 mm.

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