Induction heating device for root flange plate of wind power blade mold

Abstract

The utility model discloses a wind power blade mould root flange plate induction heating device, which comprises a wind power blade mould support frame, a wind power blade mould positioned above the wind power blade mould support frame and a mould root flange positioned at the root of the wind power blade mould, and the mould root flange is fastened with a heating device. The induction coil heating device is additionally arranged at the root of the wind power blade mold, so that heat on a root flange plate is transferred to the wind power blade, a composite material of the wind power blade is promoted to be cured, the heating device has the high-power heating characteristic, the heating rate in unit area is larger, and the heating rate is improved; the two coils are used for operation under the condition of electromagnetic coupling heating, higher heating efficiency under the same power can be achieved, the use occasion is more flexible, the technology for heating the root flange of the wind power blade mold is simplified, modular production and flow simplification are achieved in the whole operation process, the whole operation process is matched with modernized flow line production, and the production cost is reduced. The market competitiveness is promoted, and remarkable economic benefits and market advantages are brought.

Description

Technical Field

[0001] This utility model relates to the field of large wind turbine blade molds, specifically an induction heating device for the root flange plate of a wind turbine blade mold. Background Technology

[0002] The main components of wind turbine blades are resin and glass fiber. After the glass fiber is impregnated with resin, it is heated by the heating system of the mold shell until it reaches its glass transition temperature, becoming glass-reinforced plastic with tensile strength similar to carbon steel. Because the root of the wind turbine blade requires embedded parts for connecting flanges and bolts, the root of the blade is thicker than other parts of the blade. Therefore, the heating efficiency of the heating system in the blade mold shell for the root of the wind turbine blade is lower than that for other parts of the blade. Furthermore, since the root flange of the wind turbine blade mold is made of steel, and steel has high thermal conductivity, heat loss from the root of the wind turbine blade also occurs during the heating process, affecting the root curing process.

[0003] Existing heating devices within the root flange of wind turbine blade molds include two types: water heating devices and resistance wire heating devices. However, water heating devices have disadvantages such as limited maximum heating temperature and relatively complex installation and manufacturing processes. Resistance wire heating devices suffer from limited heating density and low heating rate, failing to keep pace with the heating rate on the mold itself.

[0004] For example, Chinese patent CN119348012A discloses a temperature control system for intelligent manufacturing of wind turbine blade molds, including: a temperature sensor for detecting the real-time temperature of various parts of the mold; a heating system connected to the temperature sensor for heating the mold; a cooling system connected to the temperature sensor for cooling the mold; and a controller having a temperature adjustment module, a data processing module, a feedback control module, a fault detection module, and an adaptive tuning module. The temperature adjustment module is connected to the heating and cooling systems and is used to adjust the heating and cooling systems according to the data detected by the temperature sensor. By integrating the PID control algorithm and intelligent optimization function in the adaptive tuning module, the control parameters can be dynamically adjusted according to real-time production conditions, ensuring that the temperature adjustment system maintains high-precision control in various complex production environments. However, in actual operation, due to the complex installation and manufacturing process and limited heating temperature, this technical solution cannot be used in situations with high reheating rates. Furthermore, this technical solution has high requirements for the size of the wind turbine blade mold and low applicability.

[0005] For example, Chinese patent CN110341092A discloses a temperature control device for a wind turbine blade mold, comprising: a main pipe, a heater, a cooler, and a solenoid valve; the main pipe is used to supply fluid medium to the mold; the main pipe is provided with a first connecting port and a second connecting port; a cooling branch is connected between the first connecting port and the second connecting port; the cooling branch passes through the cooler; the heater is disposed on the main pipe; the first connecting port, the second connecting port, and the heater are arranged sequentially along the supply direction of the main pipe; the solenoid valve is located on the main pipe between the first connecting port and the second connecting port and is configured to switch the opening and closing of the first connecting port so that the cooling branch and the main pipe are not connected simultaneously. With this configuration, heating and cooling of the mold can be achieved. According to the specification of this technical solution, the heater in this technical solution includes at least one heating component, and a compensating heating device for heating the branch pipe is provided on the branch pipe. The compensating heating device includes a water tank through which the branch pipe passes and a compensating heater provided on the water tank. It can be seen that the heating device of this technical solution is achieved by combining resistance wire heating and water tank heating. Such a heating method limits the heating density, the heating rate is not high and cannot keep up with the heating rate on the mold. Moreover, the structure is complex, the production cost is high, and once some parts of the structure age, the maintenance cost is high. Summary of the Invention

[0006] Purpose of the utility model: In order to overcome the shortcomings of the prior art, this utility model provides an induction heating device for the root flange plate of wind turbine blade mold. This device solves the problems of limited heating temperature, limited heating density, low heating rate, and simplifies the relatively complex installation and manufacturing process, thereby improving the heating rate of the root flange heating device for wind turbine blade mold.

[0007] Technical solution: In order to achieve the above objectives, this utility model provides an induction heating device for the root flange plate of a wind turbine blade mold, which includes: a wind turbine blade mold support frame, a wind turbine blade mold located above the wind turbine blade mold support frame, and a mold root flange located at the root of the wind turbine blade mold. The characteristic is that the mold root flange is fastened to the heating device, and the mold root flange is induction heated by the heating device.

[0008] The heating device includes: a root flange end panel, a root flange plate, and an induction coil plate. The root flange end panel and the induction coil plate are fixed to the root flange of the mold by the root flange plate. Since the method of fixing the root flange end panel to the root flange of the mold by the root flange plate is existing technology, existing technologies mostly use threaded connections, welding, riveting, etc., and this connection method is already widely used in existing technology, so it will not be described again here.

[0009] The two ends of the induction coil board are respectively connected to the two output ends of the electromagnetic induction control power supply, or the ends of the two induction coil boards are connected in series to the two output ends of the electromagnetic induction control power supply.

[0010] Connection and control method of single induction coil board: The two output ports of the electromagnetic induction control power supply are respectively connected to the two induction coil board connectors of one induction coil board. In this way, the electromagnetic induction control power supply provides high-frequency power to only one induction coil board, so that the induction coil board generates a high-frequency alternating electromagnetic field, which is used to heat the adjacent root mounting flange plate or the part mounting flange plate.

[0011] The electromagnetic coupling connection control method for dual induction coil boards is as follows: one end of the output of the electromagnetic induction control power supply is first connected to one end of the first induction coil board, the other end of the first induction coil board is then connected to one end of the second induction coil board, and the other end of the second induction coil board is then connected to the other end of the electromagnetic induction control power supply. In this way, the two induction coil boards can heat the metal components between them, improving heating efficiency.

[0012] The root flange end panel and the root flange plate are respectively equipped with temperature sensors connected to the electromagnetic induction control power supply. The temperature sensors send the real-time temperature signal of the mold root flange to the electromagnetic induction control power supply, which controls the energization and de-energization of the electromagnetic coil, thereby realizing the induction heating of the mold root flange through the electromagnetic induction control power supply.

[0013] As a further preferred embodiment of this invention, an induction coil plate is placed between the root flange end panel and the mold root flange. The high-frequency alternating electromagnetic field generated by the induction coil plate heats the mold root flange end panel. The heat is transferred through the mold root flange end panel to the mold root flange, and then to the root of the wind turbine blade, thereby promoting the curing of the resin at the root of the wind turbine blade.

[0014] As a further preferred embodiment of this utility model, the induction coil plate is provided with a groove for placing the induction coil. The depth and width of the groove are just enough to accommodate the induction coil when the induction coil is placed in the groove on the induction coil plate.

[0015] As a further preferred embodiment of this invention, after the induction coil is placed into the groove on the induction coil plate, the groove is filled with epoxy resin so that the groove and the surface of the induction coil plate without grooves are kept on the same plane after the epoxy resin is filled, thereby ensuring a tight fit between the mounting surfaces.

[0016] As a further preferred embodiment of this invention, the induction coil plate is placed on the outside of the root flange plate. The high-frequency alternating electromagnetic field generated by the induction coil plate heats the flange mounting plate. The heat is transferred through the flange mounting plate to the root flange, and then to the root of the wind turbine blade mold, thereby promoting the curing of the resin at the root of the wind turbine blade mold.

[0017] As a further preferred embodiment of this invention, after the induction coil is placed in the groove on the induction coil plate, the groove is filled with epoxy resin so that after the epoxy resin is filled, the groove and the surface of the induction coil plate without grooves are kept on the same plane.

[0018] As a further preferred embodiment of this utility model, induction coil plates are respectively added to the outer side of the root flange plate and the inner side of the root flange end panel, and grooves for installing induction coils are formed on the induction coil plates.

[0019] As a further preferred embodiment of this utility model, the induction coils are respectively placed in the grooves on the induction coil plates provided on the outer side of the root flange plate and the inner side of the root flange end panel. The grooves are filled with epoxy resin so that after the epoxy resin is filled, the grooves and the surface of the root flange end panel without grooves are kept on the same plane, thereby ensuring a tight fit between the mounting surfaces.

[0020] As a further preferred embodiment of this invention, the groove is obtained by CNC milling, and the depth and width of the groove are just enough to accommodate the induction coil plate.

[0021] The heating device installed inside the root flange of the wind turbine blade mold uses an electromagnetic coil arranged next to the mold flange. The electromagnetic coil generates a high-frequency alternating electromagnetic field. Since the mold root flange plate and the mold root flange end plate are close to the electromagnetic coil, they are in a high-frequency alternating electromagnetic field. Based on the principle of electromagnetic induction, the high-frequency alternating induced current generated inside them will generate heat, causing their own temperature to rise, thereby raising the temperature of the mold flange that is close to the electromagnetic coil.

[0022] Beneficial effects: The induction heating device for the root flange plate of the wind turbine blade mold described in this utility model has the following advantages compared with the prior art:

[0023] (1) By adding an induction coil plate heating device at the root of the wind turbine blade mold, the heat on the root flange plate is transferred to the wind turbine blade, which promotes the curing of the wind turbine blade composite material, and the heating device has high power heating characteristics, with a larger heating rate per unit area and an improved heating rate.

[0024] (2) By using two coils for electromagnetic coupling heating, higher heating efficiency can be achieved at the same power, making the application more flexible;

[0025] (3) By using the electromagnetic induction control power supply control part and the induction coil board to heat the root flange of the wind turbine blade mold, the process of heating the root flange of the wind turbine blade mold is simplified, the entire operation process realizes modular production, simplifies the process, matches with modern assembly line production, promotes market competitiveness, and brings significant economic benefits and market advantages. Attached Figure Description

[0026] Figure 1 This is a schematic diagram showing the placement of the induction coil plate between the root flange end panel and the mold root flange.

[0027] Figure 2 This is a schematic diagram showing the installation of the induction coil board on the outside of the root flange plate.

[0028] Figure 3 This is a schematic diagram showing that induction coil plates are installed between the root flange end panel and the mold root flange, as well as on the outside of the root flange plate.

[0029] Figure 4 This is a schematic diagram of the control connection method for a single induction coil board;

[0030] Figure 5 This is a schematic diagram of a dual electromagnetic coil coupling control connection method. Detailed Implementation

[0031] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0032] The present invention relates to an induction heating device for the root flange plate of a wind turbine blade mold, comprising: a wind turbine blade mold support frame 1, a wind turbine blade mold 2, a mold root flange 3, a root flange end panel 4, a root flange plate 5, an induction coil plate 6, and an electromagnetic induction control power supply 7.

[0033] The wind turbine blade mold 2 is placed above the wind turbine blade mold support frame 1. The mold root flange 3 is located at the root of the wind turbine blade mold 2. The root flange plate 5 fixes the root flange end panel 4 and the induction coil plate 6 to the mold root flange 3.

[0034] The two ends of the induction coil board 6 are respectively connected to the two output ends of the electromagnetic induction control power supply 7 to form a single induction coil board connection control mode; the ends of the two induction coil boards 6 are connected in series to the two output ends of the electromagnetic induction control power supply 7 to form a dual induction coil board electromagnetic coupling connection control mode. Example

[0035] like Figure 1As shown, the wind turbine blade mold 2 is placed above the wind turbine blade mold support frame 1. The inner side of the root flange end panel 4 is provided with an induction coil plate 6. The induction coil plate 6 is provided with a groove for placing the induction coil. The depth and width of the groove are just enough to place the induction coil.

[0036] After the induction coil plate is laid in the groove on the induction coil plate 6 inside the root flange end panel 4, the groove where the induction coil is placed is filled with epoxy resin so that the groove and the surface of the induction coil plate 6 without grooves are kept on the same plane after the epoxy resin is filled, thereby ensuring a tight fit of the mounting surface.

[0037] Then, the root flange end panel 4 and the induction coil plate 6 are fixed on the root flange 3 of the mold using the root flange plate 5. By placing the induction coil plate 6 between the root flange end panel 4 and the root flange 3 of the mold, the high-frequency alternating electromagnetic field generated by the induction coil plate 6 is used to heat the root flange end panel 4. The heat is transferred to the root flange 5 through the root flange end panel 4, and then transferred to the root of the wind turbine blade mold 2, thereby promoting the curing of the resin at the root position of the wind turbine blade mold 2.

[0038] Finally, the two ends of the induction coil plate 6 are led out and connected to the two output ends of the electromagnetic induction control power supply 7. The two output ports of the electromagnetic induction control power supply 7 are respectively connected to the two induction coil plate connectors of one induction coil plate 6. In this way, the electromagnetic induction control power supply 7 provides high-frequency power to only one induction coil plate 6, causing the induction coil plate 6 to generate a high-frequency alternating electromagnetic field, which is used to heat the adjacent root flange end panel 4. Figure 4 As shown;

[0039] A temperature sensor connected to the electromagnetic induction control power supply 7 is provided on the root flange end panel 4. The temperature sensor sends the real-time temperature signal of the mold root flange 3 to the electromagnetic induction control power supply 7, which controls the energization and de-energization of the electromagnetic coil 6, thereby realizing the induction heating of the mold root flange 3 by the electromagnetic induction control power supply 7. Example

[0040] like Figure 2 As shown, the wind turbine blade mold 2 is placed above the wind turbine blade mold support frame 1. An induction coil plate 6 is provided on the outer side of the root flange plate 5. The induction coil plate 6 is provided with a groove, and the depth and width of the groove are just enough to accommodate the induction coil.

[0041] After the induction coil is laid in the groove on the induction coil plate 6 on the outside of the root flange plate 5, the groove where the induction coil is placed is filled with epoxy resin so that the groove and the surface of the induction coil plate 6 without grooves are kept on the same plane after the epoxy resin is filled, thereby ensuring a tight fit between the mounting surfaces.

[0042] Then, the induction coil plate 6, the root flange plate 5, and the root flange end panel 4 are fixed to the root flange 3 of the mold in sequence by means of threaded connection, riveting, or welding. By placing the induction coil plate 6 on the outside of the root flange plate 5, the high-frequency alternating electromagnetic field generated by the induction coil plate 6 is used to heat the root flange plate 5. The heat is transferred to the root of the wind turbine blade mold 2 through the root flange plate 5, thereby promoting the curing of the resin at the root position of the wind turbine blade mold 2.

[0043] Finally, the two ends of the induction coil plate 6 are led out and connected to the two output ends of the electromagnetic induction control power supply 7. The two output ports of the electromagnetic induction control power supply 7 are respectively connected to the two induction coil plate connectors of one induction coil plate 6. In this way, the electromagnetic induction control power supply 7 provides high-frequency power to only one induction coil plate 6, causing the induction coil plate 6 to generate a high-frequency alternating electromagnetic field, which is used to heat the adjacent root flange plate 5. Figure 4 As shown.

[0044] A temperature sensor connected to the electromagnetic induction control power supply 7 is provided on the root flange plate 5. The temperature sensor sends the real-time temperature signal of the mold root flange 3 to the electromagnetic induction control power supply 7. The electromagnetic induction control power supply 7 controls the energization and de-energization of the electromagnetic coil 6 to realize the induction heating of the mold root flange 3 through the electromagnetic induction control power supply 7. Example

[0045] like Figure 3 As shown, the wind turbine blade mold 2 is placed above the wind turbine blade mold support frame 1. The outer side of the root flange plate 5 and the inner side of the root flange end panel 4 are provided with induction coil plates 6. The induction coil plates 6 are provided with grooves, and the depth and width of the grooves are just enough to accommodate the induction coils.

[0046] Place the two induction coil plates 6 on the outside of the root flange plate 5 and the inside of the root flange end panel 4 respectively. Fill the grooves where the induction coils are placed with epoxy resin so that after the epoxy resin is filled, the grooves and the surface of the induction coil plate 6 without grooves are kept on the same plane, thereby ensuring a tight fit between the mounting surfaces.

[0047] Then, by means of threaded connection, riveting or welding, the induction coil plate 6, the root flange plate 5, another induction coil plate 6, and the root flange end panel 4 are fixed to the root flange 3 of the mold in sequence. By placing the induction coil plate 6 on the outside of the root flange plate 5 and placing the induction coil plate 6 between the root flange end panel 4 and the root flange 3 of the mold, the high-frequency alternating electromagnetic field generated by the induction coil plate 6 is used to heat the root flange plate 5 and the root flange end panel 4 respectively. The heat is transferred to the root of the wind turbine blade mold 2 through the root flange plate 5 and the root flange end panel 4, thereby promoting the curing of the resin at the root position of the wind turbine blade mold 2.

[0048] Finally, the ends of the two induction coil plates 6 are connected in series to the two output terminals of the electromagnetic induction control power supply 7. One output terminal of the electromagnetic induction control power supply 7 is first connected to one end of the first induction coil plate 6, and the other end of the first induction coil plate 6 is then connected to one end of the second induction coil plate 6. The other end of the second induction coil plate 6 is then connected to the other output terminal of the electromagnetic induction control power supply 7. In this way, the two induction coil plates 6 can heat the metal parts between the two induction coil plates 6, improving heating efficiency. Figure 5 As shown;

[0049] Temperature sensors connected to the electromagnetic induction control power supply 7 are respectively installed on the root flange end panel 4 and the root flange plate 5. The temperature sensors send the real-time temperature signal of the mold root flange 3 to the electromagnetic induction control power supply 7, which controls the energization and de-energization of the two electromagnetic coils 6, thereby realizing the induction heating of the mold root flange 3 by the electromagnetic induction control power supply 7.

[0050] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A wind turbine blade mould root flange plate induction heating apparatus comprising: The utility model provides a wind power blade mould support frame (1), wind power blade mould (2) above wind power blade mould support frame (1) and mould root flange (3) at the root of wind power blade mould (2), it is characterized in that: the mould root flange (3) is fastened with heating device, and the mould root flange (3) is inductively heated through heating device. The heating device comprises a root flange end panel (4), a root flange plate (5) and an induction coil plate (6), and the root flange end panel (4) and the induction coil plate (6) are fixed on the mould root flange (3) through the root flange plate (5). The two ends of the induction coil plate (6) are connected to the two output ends of an electromagnetic induction control power supply (7), or the ends of the two induction coil plates (6) are connected in series to the two output ends of the electromagnetic induction control power supply (7). Temperature sensors connected to the electromagnetic induction control power supply (7) are arranged on the root flange end panel (4) and the root flange plate (5).

2. A wind turbine blade mould root flange plate induction heating apparatus according to claim 1 characterised in that: The induction coil plate (6) is arranged between the root flange end panel (4) and the mould root flange (3).

3. A wind turbine blade mould root flange plate induction heating apparatus according to claim 2, characterised in that: The induction coil plate (6) is provided with a groove for placing an induction coil.

4. A wind turbine blade mould root flange plate induction heating apparatus according to claim 3, characterised in that: After the induction coil is placed in the groove, epoxy resin is used to fill the groove, and the surface of the groove that is not provided with a groove and the induction coil plate (6) are kept in a plane after the epoxy resin is filled.

5. The wind turbine blade mould root flange plate induction heating apparatus according to claim 1, characterised in that: The induction coil plate (6) is arranged outside the root flange plate (5).

6. A wind turbine blade mould root flange plate induction heating arrangement according to claim 5, characterised in that: The induction coil plate (6) arranged outside the root flange plate (5) is provided with a groove, and after the induction coil is placed in the groove of the induction coil plate (6), epoxy resin is used to fill the groove, and the surface of the groove that is not provided with a groove and the induction coil plate (6) are kept in a plane after the epoxy resin is filled.

7. A wind turbine blade mould root flange plate induction heating apparatus according to claim 1 characterised in that: Induction coil plates (6) are additionally arranged outside the root flange plate (5) and inside the root flange end panel (4).

8. A wind turbine blade mould root flange plate induction heating arrangement according to claim 7, characterised in that: The induction coil plates (6) are respectively provided with grooves for placing induction coils, and after the induction coils are placed in the grooves, epoxy resin is used to fill the grooves, and the surface of the groove that is not provided with a groove and the induction coil plate (6) are kept in a plane after the epoxy resin is filled.

9. A wind turbine blade mould root flange plate induction heating arrangement according to claim 3 or 6 or 8, characterised in that: The grooves are obtained by using CNC milling.

Images