阅读说明：本技术 一种电磁加热控制电路及拉玛器 (Electromagnetic heating control circuit and gamma ware ) 是由 张明波 陈育文 庄秀忠 宫俊芳 阮国华 王市欢 于 2021-09-18 设计创作，主要内容包括：本发明公开了一种电磁加热控制电路及拉玛器,控制电路包括：整流单元、滤波单元、控制单元和加热单元；整流单元的输入端与交流电压输入端连接,整流单元的输出端与滤波单元的输入端连接,滤波单元的输出端分别与控制单元的输入端和加热单元连接,控制单元与加热单元连接。本发明实施例采用电磁加热方式对轴承进行加热,使得轴承的加热效率提高,避免加热过慢导致与轴承衔接的部分因为热传递同样受热膨胀,而不利于轴承的拆卸效率,从而能够快速、精准对待拆卸的轴承进行加热,提高轴承的拆卸效率；采用钳形加热线圈301与轴承适配,以均匀加热轴承内圈定点,有效地提高了轴承的加热效率,从而能够有效提高拉玛器的工作效率。(The invention discloses an electromagnetic heating control circuit and a gamma device, wherein the control circuit comprises: the device comprises a rectifying unit, a filtering unit, a control unit and a heating unit; the input end of the rectifying unit is connected with the alternating voltage input end, the output end of the rectifying unit is connected with the input end of the filtering unit, the output end of the filtering unit is respectively connected with the input end of the control unit and the heating unit, and the control unit is connected with the heating unit. According to the embodiment of the invention, the bearing is heated in an electromagnetic heating mode, so that the heating efficiency of the bearing is improved, and the problem that the part connected with the bearing is heated and expanded due to heat transfer and is not beneficial to the disassembly efficiency of the bearing due to too slow heating is avoided, so that the bearing to be disassembled can be heated quickly and accurately, and the disassembly efficiency of the bearing is improved; the pincerlike heating coil 301 is matched with the bearing to uniformly heat the fixed point of the inner ring of the bearing, so that the heating efficiency of the bearing is effectively improved, and the working efficiency of the Rama device can be effectively improved.)

1. An electromagnetic heating control circuit, comprising:

the device comprises a rectifying unit, a filtering unit, a control unit and a heating unit;

the input end of the rectifying unit is connected with the alternating voltage input end, the output end of the rectifying unit is connected with the input end of the filtering unit, the output end of the filtering unit is respectively connected with the input end of the control unit and the heating unit, and the control unit is connected with the heating unit.

2. The electromagnetic heating control circuit according to claim 1, wherein the rectifying unit includes a rectifying bridge and a choke coil, and the filtering unit includes a smoothing capacitor;

the input end of the rectifier bridge is connected with the alternating voltage input end, and the positive voltage output end of the rectifier bridge is connected with one end of the smoothing capacitor through the choke coil; and the negative voltage output end of the rectifier bridge is connected with the other end of the smoothing capacitor.

3. The electromagnetic heating control circuit of claim 2, wherein the heating unit comprises a heating coil and a resonant capacitor, and the control unit comprises a gating tube;

the resonant capacitor is connected in parallel at two ends of the heating coil, and the gating tube is respectively connected with the heating coil and the smoothing capacitor.

4. The electromagnetic heating control circuit of claim 3, wherein the heating coil is a pincer heating coil.

5. An electromagnetic heating gamma, comprising the electromagnetic heating control circuit of any one of claims 1-4.

Technical Field

The invention relates to the technical field of mechanical maintenance and disassembly, in particular to an electromagnetic heating control circuit and a gamma device.

Background

At present, a hydraulic puller is generally adopted for pulling out the bearing for disassembling a large mechanical bearing. But current hydraulic pressure draws ma ware needs to cooperate the heating method of oxygen acetylene to heat the bearing, is drawn out by hydraulic pressure drawing ma ware after the bearing is heated the inflation, but oxygen acetylene heating methods can't make the bearing be heated evenly, and is lower to the heating efficiency of bearing, leads to drawing the work efficiency of ma ware lower.

Disclosure of Invention

The invention provides an electromagnetic heating control circuit and a gamma device, and aims to solve the problems that the existing hydraulic gamma device cannot enable a bearing to be heated uniformly, the heating efficiency of the bearing is low, and the working efficiency of the gamma device is low.

A first embodiment of the present invention provides an electromagnetic heating control circuit including:

the device comprises a rectifying unit, a filtering unit, a control unit and a heating unit;

the input end of the rectifying unit is connected with the alternating voltage input end, the output end of the rectifying unit is connected with the input end of the filtering unit, the output end of the filtering unit is respectively connected with the input end of the control unit and the heating unit, and the control unit is connected with the heating unit.

Further, the rectifying unit comprises a rectifying bridge and a choke coil, and the filtering unit comprises a smoothing capacitor;

the input end of the rectifier bridge is connected with the alternating voltage input end, and the positive voltage output end of the rectifier bridge is connected with one end of the smoothing capacitor through the choke coil; and the negative voltage output end of the rectifier bridge is connected with the other end of the smoothing capacitor.

Further, the heating unit comprises a heating coil and a resonant capacitor, and the control unit comprises a gating tube;

the resonant capacitor is connected in parallel at two ends of the heating coil, and the gating tube is respectively connected with the heating coil and the smoothing capacitor.

Further, the heating coil is a pincer-shaped heating coil.

The second embodiment of the invention provides an electromagnetic heating gamma machine, which comprises the electromagnetic heating control circuit.

According to the embodiment of the invention, the bearing is heated in an electromagnetic heating mode, so that the heating efficiency of the bearing is improved, and the problem that the part connected with the bearing is heated and expanded due to heat transfer and is not beneficial to the disassembly efficiency of the bearing due to too slow heating is avoided, so that the bearing to be disassembled can be heated quickly and accurately, and the disassembly efficiency of the bearing is improved; the pincerlike heating coil 301 is matched with the bearing to uniformly heat the fixed point of the inner ring of the bearing, so that the heating efficiency of the bearing is effectively improved, and the working efficiency of the Rama device can be effectively improved.

Furthermore, the electromagnetic heating gamma device provided by the embodiment of the invention can heat the bearing by adopting the electromagnetic heating gamma device arranged inside, and extra external tools such as oxygen, acetylene, a baking handle, a gamma frame, a jack and the like do not need to be prepared in the process of disassembling the bearing, so that the complexity of operation can be effectively reduced, and the working efficiency of the gamma device can be further improved.

Drawings

Fig. 1 is a schematic structural diagram of an electromagnetic heating control circuit provided in an embodiment of the present invention;

fig. 2 is another schematic structural diagram of an electromagnetic heating control circuit according to an embodiment of the present invention.

Wherein, the attached figure labels in the attached drawings of the specification are specifically as follows:

10. a rectifying unit; 101. a rectifier bridge; 102. a choke coil; 20. a filtering unit; 201. a smoothing capacitor; 30. a control unit; 301. a door control pipe; 40. a heating unit; 401. a heating coil; 402. a resonant capacitance.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1-2, in a first embodiment of the present invention, there is provided an electromagnetic heating control circuit 30 shown in fig. 1, including:

a rectifying unit 10, a filtering unit 20, a control unit 30, and a heating unit 40;

the input end of the rectifying unit 10 is connected with the alternating voltage input end 50, the output end of the rectifying unit 10 is connected with the input end of the filtering unit 20, the output end of the filtering unit 20 is respectively connected with the input end of the control unit 30 and the heating unit 40, and the control unit 30 is connected with the heating unit 40.

In the embodiment of the present invention, the ac voltage is 220V, the rectifying unit 10 rectifies the 220V ac voltage of 50Hz into a dc voltage, and the dc voltage is filtered by the smoothing capacitor 201 in the filtering unit 20.

The control unit 30 converts the filtered direct current voltage into a high-frequency voltage with the frequency of 20 KHz-40 KHz, the current changing at high speed can generate a magnetic field changing at high speed under heating, a large amount of strong eddy current can be generated when magnetic lines of force in the magnetic field pass through metal in the bearing, and when the eddy current is blocked by material resistance, a large amount of heat is emitted to heat the bearing in contact with the heating coil 401, so that the bearing is heated and expanded.

In one embodiment, the electromagnetic heating control circuit 30 of the embodiment of the present invention is disposed in the electromagnetic heating expander, so as to heat the bearing to be heated by the electromagnetic heating control circuit 30, so that the bearing is easily pulled out after being heated and expanded, thereby effectively improving the working efficiency of the expander.

As a specific implementation manner of the embodiment of the present invention, the rectifying unit 10 includes a rectifying bridge 101 and a choke coil 102, and the filtering unit 20 includes a smoothing capacitor 201;

the input end of the rectifier bridge 101 is connected with the alternating voltage input end 50, and the positive voltage output end of the rectifier bridge 101 is connected with one end of the smoothing capacitor 201 through the choke coil 102; the negative voltage output terminal of the rectifier bridge 101 is connected to the other terminal of the smoothing capacitor 201.

As a specific implementation manner of the embodiment of the present invention, the heating unit 40 includes a heating coil 401 and a resonant capacitor 402, and the control unit 30 includes a gating tube 301;

the resonant capacitor 402 is connected in parallel to both ends of the heating coil 401, and the gate tube 301 is connected to the heating coil 401 and the smoothing capacitor 201, respectively.

In one embodiment, the gate transistor 301(IGBT) is an insulated gate bipolar transistor, which is formed by a field effect transistor and a darlington transistor. The gate tube 301 in the present embodiment can safely operate for a long time in a high-voltage, large-current state under a driving voltage, and exhibits excellent switching characteristics.

As a specific implementation of the embodiment of the present invention, the heating coil 401 is a pincer-shaped heating coil 401.

The heating coil 401 in the embodiment of the present invention is a pincer-shaped heating coil 401, that is, the heating coil 401 is similar to a pincer of a pincer ammeter, and the heating coil 401 in the embodiment of the present invention can be adapted to various bearings to be heated through the design of the pincer-shaped heating coil 401, so that the heating of the inner ring of the bearing at a fixed point can be more uniform, and the heating accuracy can be effectively improved.

In a specific embodiment, the heating temperature is controlled by a temperature sensor so as to improve the control accuracy of the heating temperature.

An embodiment of the present invention provides an electromagnetic heating gamma device, which includes the electromagnetic heating control circuit 30.

According to the embodiment of the invention, the bearing is heated in an electromagnetic heating mode, so that the heating efficiency of the bearing is improved, and the problem that the part connected with the bearing is heated and expanded due to heat transfer and is not beneficial to the disassembly efficiency of the bearing due to too slow heating is avoided, so that the bearing to be disassembled can be heated quickly and accurately, and the disassembly efficiency of the bearing is improved; the pincerlike heating coil 401 is matched with the bearing to uniformly heat the fixed point of the inner ring of the bearing, so that the heating efficiency of the bearing is effectively improved, and the working efficiency of the Rama device can be effectively improved.

Furthermore, the electromagnetic heating gamma device provided by the embodiment of the invention can heat the bearing by adopting the electromagnetic heating gamma device arranged inside, and extra external tools such as oxygen, acetylene, a baking handle, a gamma frame, a jack and the like do not need to be prepared in the process of disassembling the bearing, so that the complexity of operation can be effectively reduced, and the working efficiency of the gamma device can be further improved.

The foregoing is a preferred embodiment of the present invention, and it should be noted that it would be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are also considered to be within the scope of the invention.