Multifunctional electromagnetic heating device

Abstract

The utility model provides a multifunctional electromagnetic heating device which comprises a device body, an electromagnetic heating main circuit board and an output capacitor used for filtering are arranged in the device body, and the output end of the electromagnetic heating main circuit board is connected with an induction coil used for being wound on a coupling. The output capacitor is connected between the electromagnetic heating main circuit board and the induction coil, a control circuit board and a temperature control displayer are arranged on the side face of the device body, the input end of the control circuit board is connected with temperature sensors fixed to a coupling and a traction motor driving shaft, and the output end of the control circuit board is connected with the temperature control displayer. A cooling fan is arranged on the outer wall, close to one side of the output capacitor, of the device body. The device is simple in structure and reasonable in design, has the functions of temperature self-control, overload protection, current limitation and the like, can ensure the safety during use, and greatly improves the disassembly efficiency of the coupling.

Description

Technical Field

[0001] This utility model relates to the field of traction motor auxiliary disassembly and assembly technology, specifically a multifunctional electromagnetic heating device. Background Technology

[0002] During the major overhaul of subway car frames, it was found that many motor couplings (more than 30 units) could not be disassembled from the traction motor even with the use of high-pressure oil pumps and auxiliary tools provided by the manufacturer, which prevented the traction motor from being disassembled and maintained.

[0003] Careful on-site observation revealed that hydraulic oil was seeping out from the contact surface between the traction motor shaft and the coupling during disassembly. Analysis of the assembly surface structure of the Flender coupling and the Siemens traction motor shaft indicated that the reason this coupling could not be removed from the motor shaft was:

[0004] 1. The axial oil groove on the inner gear sleeve of the drum-shaped gear coupling is too short, which causes the distance between the circumferential oil groove and the end of the inner gear sleeve to be too large, and the end of the coupling cannot achieve effective expansion.

[0005] 2. The pressure holding effect is not ideal. Hydraulic oil seeps out before the traction motor shaft and the coupling contact surface. The hydraulic oil does not effectively expand the coupling and motor assembly surface, causing the inner gear sleeve of the coupling to not be suspended on the traction motor shaft.

[0006] The following three methods are used in the existing technology to disassemble these couplings:

[0007] 1. Cooling method: It has disadvantages such as high cost, environmental pollution and low safety. In addition, the hydraulic oil inside the coupling freezes due to low temperature, so the coupling cannot be disassembled in the end.

[0008] 2. Hot air gun heating method: If the heating time is too long, the surface of the coupling will not be heated evenly, and the heating temperature will not be high enough, so the coupling cannot be removed.

[0009] 3. Cutting method: This method can dismantle the coupling, but it will completely destroy the coupling. If not operated properly, it will cause personal injury, damage to the motor shaft, and scrapping of the traction motor. Utility Model Content

[0010] To address the shortcomings of the existing technology, this utility model provides a multifunctional electromagnetic heating device. By using a soft coil and the principle of electromagnetic heating, the coupling is heated quickly and evenly, thereby disassembling the coupling. The device has safety measures such as temperature self-control, overload protection, and current limiting, which can ensure safety during use and greatly improve the success rate of disassembly.

[0011] The technical solution provided by this utility model is as follows: A multifunctional electromagnetic heating device includes a device body. An electromagnetic heating main circuit board and an output capacitor for filtering are disposed within the device body. The output end of the electromagnetic heating main circuit board is connected to an induction coil wound on a coupling. The output capacitor is connected between the electromagnetic heating main circuit board and the induction coil. A control circuit board and a temperature control display are disposed on the side of the device body. The input end of the control circuit board is connected to a temperature sensor fixed on the coupling and the drive shaft of the traction motor. The output end of the control circuit board is connected to the temperature control display. A cooling fan is disposed on the outer wall of the device body near the output capacitor.

[0012] Furthermore, a power module is provided inside the main body of the device, and the power module is electrically connected to the control circuit board.

[0013] Furthermore, a heat sink is provided above the bottom of the main body of the device, and the electromagnetic heating main circuit board is mounted on the heat sink.

[0014] Furthermore, the side of the main body of the device is provided with a current adjustment knob, a current and voltage display screen and a main switch, and the current adjustment knob and the current and voltage display screen are electrically connected to the control circuit board.

[0015] Furthermore, a socket is provided on the outer wall of the main body of the device for connecting an external power source.

[0016] Furthermore, the internal circuitry of the electromagnetic heating main circuit board includes an IGBT module and capacitors for inversion, voltage regulation, and filtering.

[0017] The beneficial effects of this utility model are:

[0018] (1) Overcoming the technical challenge of the inability to disassemble some traction motor couplings provides a guarantee for the maintenance of couplings and traction motors.

[0019] (2) The induction coil uses a soft coil, which has wide applicability. The number of turns of the coil can be adjusted according to the shape and size of the workpiece to effectively heat the workpiece. It is suitable for disassembling various interference fit equipment and various large fasteners.

[0020] (3) It has adjustable working power. According to the assembly characteristics of the workpiece, the current can be adjusted by the knob to adjust the output power in real time and generate the temperature required by the workpiece.

[0021] (4) It can realize real-time monitoring of component temperature and online detection of device operating conditions. By using two temperature sensors, it can monitor the temperature of disassembled parts and fixed parts in real time to avoid equipment burnout.

[0022] (5) It can achieve one-time smooth disassembly of the coupling, avoiding repeated disassembly of the coupling, which would waste manpower and time, and shorten the operation cycle, ensuring the normal progress of the overhaul production. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is the circuit schematic diagram of this utility model;

[0025] In the diagram: 1—Main body of the device, 2—Electromagnetic heating main circuit board, 3—Output capacitor, 4—Induction coil, 5—Control circuit board, 6—Temperature control display, 7—Temperature sensor, 8—

[0026] 9—Cooling fan, 10—Power module, 11—Current adjustment knob, 12—Current and voltage display, 13—Main switch, 14—Socket, 15—Heat sink. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] like Figure 1 and Figure 2The multifunctional electromagnetic heating device shown includes a main body 1. An electromagnetic heating main circuit board 2 and an output capacitor 3 for filtering are disposed within the main body 1. The output end of the electromagnetic heating main circuit board 2 is connected to an induction coil 4 wound around a coupling. The output capacitor 3 is connected between the electromagnetic heating main circuit board 2 and the induction coil 4. A control circuit board 5 and a temperature control display 6 are disposed on the side of the main body 1. The input end of the control circuit board 5 is connected to a temperature sensor 7 fixed on the coupling and the drive shaft of the traction motor. The output end of the control circuit board 5 is connected to the temperature control display 6. A cooling fan 8 is disposed on the outer wall of the main body 1 near the output capacitor 3.

[0031] The main body 1 of the device is equipped with a power module 9, which is electrically connected to the control circuit board 5. A heat sink 14 is provided on the top bottom of the main body 1, and the electromagnetic heating main circuit board 2 is mounted on the heat sink 14. A current adjustment knob 10, a current and voltage display screen 11, and a main switch 12 are provided on the side of the main body 1, and the current adjustment knob 10 and the current and voltage display screen 11 are electrically connected to the control circuit board 5.

[0032] A socket 13 is provided on the outer wall of the main body 1 of the device for connecting an external power source to provide AC power. The internal circuit of the electromagnetic heating main circuit board 2 includes an IGBT module and capacitors for inversion, voltage regulation, and filtering.

[0033] In use, this invention involves winding a flexible induction coil around a coupling, and fixing two temperature sensors to the coupling and the traction motor drive shaft, respectively. Turning on the main switch converts the mains AC power to high-frequency AC power via a current adjustment knob. When the high-frequency AC power passes through the coil, it generates an alternating magnetic field. This alternating magnetic field induces eddy currents in the coupling, generating heat and raising its temperature. Due to thermal expansion and contraction, a tiny gap forms at the contact surface of the drive shaft, allowing the coupling to be disassembled. By employing two temperature sensors, the temperatures of both the disassembled and fixed components are monitored in real time, preventing equipment burn-out.

[0034] Using this device, couplings can be disassembled smoothly in one go, avoiding repeated disassembly of couplings, which would waste manpower and time, and shortening the operation cycle, thus ensuring the normal progress of the overhaul production schedule.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multifunctional electromagnetic heating device, characterized in that, The device includes a main body (1), which contains an electromagnetic heating main circuit board (2) and an output capacitor (3) for filtering. The output end of the electromagnetic heating main circuit board (2) is connected to an induction coil (4) for winding on a coupling. The output capacitor (3) is connected between the electromagnetic heating main circuit board (2) and the induction coil (4). The side of the main body (1) is provided with a control circuit board (5) and a temperature control display (6). The input end of the control circuit board (5) is connected to a temperature sensor (7) fixed on the coupling and the drive shaft of the traction motor. The output end of the control circuit board (5) is connected to the temperature control display (6). A cooling fan (8) is provided on the outer wall of the main body (1) near the output capacitor (3).

2. The multifunctional electromagnetic heating device according to claim 1, characterized in that, The main body (1) of the device is provided with a power module (9), which is electrically connected to the control circuit board (5).

3. The multifunctional electromagnetic heating device according to claim 1, characterized in that, A heat sink (14) is provided above the bottom of the main body (1) of the device, and the electromagnetic heating main circuit board (2) is mounted on the heat sink (14).

4. The multifunctional electromagnetic heating device according to claim 1, characterized in that, The main body (1) of the device is provided with a current adjustment knob (10), a current and voltage display screen (11) and a main switch (12) on its side. The current adjustment knob (10) and the current and voltage display screen (11) are electrically connected to the control circuit board (5).

5. The multifunctional electromagnetic heating device according to claim 1, characterized in that, A socket (13) is provided on the outer wall of the main body (1) of the device for connecting an external power source.

6. The multifunctional electromagnetic heating device according to claim 1, characterized in that, The internal circuit of the electromagnetic heating main circuit board (2) includes an IGBT module and a capacitor for inversion, voltage regulation and filtering.

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