CN1090086A

CN1090086A - Electromagnetic heating magnetic eraser

Info

Publication number: CN1090086A
Application number: CN 93101259
Authority: CN
Inventors: 吴庆隆
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-26
Filing date: 1993-01-26
Publication date: 1994-07-27

Abstract

The invention provides a kind of electromagnetic heating magnetic eraser, comprise that a U-iron heart has two upright open ends, this two upright open end respectively is wound with coil, the series connection mutually of one of this two coil end, its other end is connected to one and has the AC power of preset frequency variation, this two coil makes two open ends of the U-iron heart produce staggered variable magnetic force line simultaneously, a horizontal straight-bar iron staff on two open ends of this U-iron heart, in order to wear a bearing to be heated to proper temperature, or be provided with a non-magnetic plate in this two open end, can place on this non-magnetic plate that magnetic conductivity vessel are heated or magnetized article to one gives demagnetization.

Description

Electromagnetic heating magnetic eraser

The invention relates to a kind of calutron, the device that is applied to METAL HEATING PROCESS or magnetized article is carried out rapid demagnetization.

The present invention is applied to the METAL HEATING PROCESS aspect and is divided into two kinds of purposes, and one is industrial heating purposes, and another is the heating purposes of commercial application.In industrial heating purposes mainly is to be used for bearing when assembling, and heating splashes its volume to open and endoporus enlarges in order to being assemblied on one.On commerce is used, mainly be to be used for heat food or drinking-water, reach identical heating function and purpose to be different from existing electromagnetic oven structure.The present invention can be used as the demagnetization of magnetized product in addition, and for example the rapid demagnetization of audiotape, video tape makes it become blank tape, or for many-sided purposes such as the rapid demagnetizations of industrial products part.

Known to the just existing skill, must closely cooperate during the bearing assembling, mode commonly used is to be press-fitted combination with particular tool, only many occasions also can't use specific purpose tool to be press-fitted bearing, one highest wisdom can't accurately be installed usually and makes bearing location to be beaten the bearing of packing into, thereby influence the useful life of bearing and going slick property, so the preferable practice is that bearing is heated to predetermined temperature, its endoporus is expanded enlarge, then can accurately promptly bearing be placed in axle and go up the location.Existing bearing heats common person and places the oil of high temperature to heat on bearing, not only heating time long, and the equipment of use and inconvenient.

As for present common electromagnetic heating furnace as commercial use, be that AC power is converted to DC power supply, make power supply do the switching of high frequency (about 30KHZ) with the control circuit of complexity extremely again, this electric current produces alternating magnetic field by an induction coil, the pan container that utilizes this alternating magnetic field to respond to its top generates heat and heat food, its whole control circuit is very complicated, the manufacturing cost height.

About the demagnetization aspect, some element can have magnetic in the industrial products manufacture process, must give demagnetization, common degaussing gear is to utilize electronic circuit control-circuit to switch the interior sense of current of the coil of flowing through is alternately changed, and in handoff procedure, progressively reduce the voltage swing that imposes on this coil, eventually till the no-voltage,, then reach the effect of demagnetization even also its hysteresis loop area of forming curve is contracted to initial point gradually.This kind degaussing gear also is preset with the sophisticated electronic control circuit, also increases the cost and the cost of degaussing gear certainly.

The present invention's main purpose is to provide a kind of electromagnetic heating magnetic eraser, electromagnetic principle is used heating and the demagnetizing action that can reach the metal element with simple structural design, a simple and easy metal heating or the degaussing gear of article be provided at lower cost.

The present invention's a time purpose is to provide a kind of electromagnetic heating magnetic eraser, need not special control circuit, makes it simple in structure, and volume is little, easy to use and failure rate is low.

The present invention's another purpose is to provide a kind of electromagnetic heating magnetic eraser, is applicable to the heating and the demagnetization of industrial use and commercial application, is the calutron of a multipurpose.

Greenly be, electromagnetic heating magnetic eraser of the present invention comprises a U sections heart, constitute by multi-disc U-shaped silicon steel sheet is superimposed, this iron core has the coil that open two ends respectively are wound with the suitable number of turns, this two coil-windings direction is identical, that is be all clockwise direction or coiling counterclockwise, one of two coils end is serial connection mutually, the other end of two coils also connects an AC power, then make one of this U sections heart opening end produce alternating expression magnetic field, that is the open end of iron core produces neither the magnetic line of force in the same way simultaneously, and this neither in the same way magnetic field change according to AC power is staggered; Then should can insert a magnetic conduction iron staff between the iron core open end, with concentration magnetic line of force conducting direction, this iron staff upper sleeve through one bearing then rapidly induction heating to design temperature, can put a non-magnetic plate on this U sections heart, this non-magnetic plate top surface can be for storing magnetic conductive metal container generates heat rapidly to respond to this alternating expression magnetic field in order to food in the heating container or drinking-water.If will magnetize the staggered field regions of article material, then make the systematicness molecules align of magnetization article thereby entanglement and reach the demagnetization purpose by this U sections heart open end.

Relevant the present invention's detailed structure, composition mode and characteristics can be got fully by the detailed description of following examples conjunction with figs. and understand.

Fig. 1 is one of electromagnetic heating magnetic eraser of the present invention equivalent circuit structure and magnetic circuit schematic diagram;

Fig. 2 is the magnetic circuit schematic diagram that electromagnetic heating magnetic eraser of the present invention adds load;

Fig. 3 is that the present invention's one application examples is as heating the schematic diagram of a bearing;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is the schematic diagram of Another Application example heating one bowl of the present invention;

Fig. 6 be the present invention again an application examples to the schematic diagram of an article demagnetization.

At first see also Fig. 1, the structure of this invention electromagnetic heating magnetic eraser comprises being piled up by multi-disc U type silicon steel sheet one of forms the U sections heart (10), its two upright open end (110, (12) be wound with two groups of pitch of the laps L1 on respectively, L2, this two coil L1, L2 connects mutually and is parallel to an AC power VAC again, insert the power supply (for example 60HZVAC) of a preset frequency variation when this AC power, two open ends (11) of this U sections heart (10), (12) produce an alternating magnetic field φ 1 between, φ 2, and this alternating magnetic field size changes with electric current and voltage size and the frequency of this AC power of work VAC.

Above-mentioned electromagnetic heating magnetic eraser is to utilize two coil L1, L2 to be connected with connection in series-parallel between power supply VAC, make two line coil L1, L2 belong to primary side together for power supply, and must directly produce alternating magnetic field in the open end of its U sections heart, utilize this alternating magnetic field to reach the purpose of heating of metal or demagnetization.

As shown in Figure 2, between two open ends of this U sections heart (10), put a straight-bar iron staff (14), then two open ends (11), (12) magnetic line of force φ 1 that interlocks of the magnetic between, φ 2 must concentrate by this straight-bar iron staff (14), and the open end (11) of this straight-bar iron staff (14) and this U sections heart (10), (12) the sectional area A1 that contacts is about this open end (11), (12) 1/3rd of area of core section, more concentrated with guiding magnetic ledger line by this straight-bar iron staff (14), used this straight-bar iron staff upper sleeve through hardware, will make this hardware induction produce vortex flow and heat this hardware.

As Fig. 3, shown in 4, the straight-bar iron staff (14) of application drawing 2 is coated with a bearing (15), feed AC power when connecting power supply VAC, this two open end (11), the alternation magnetic line of force φ 1 of generation (12), φ 2 is by this straight-bar iron staff (14) and bearing (15) and inducing eddy-current heats this bearing (15), its heating time and temperature must be by the voltages of power supply VAC, electric current and frequency size and change or adjust, therefore the may command bearing is heated to proper temperature, for example about 200 ℃, its endoporus aperture is enlarged, be able to easily this bearing (15) is installed in one and go up the location, in order to accurately installing of bearing.

The U sections heart (10) volume that above-mentioned electromagnetic heating magnetic eraser is applied to heat bearing is little, and can be simple and easy and promptly heated mandrel (15) to proper temperature, carry and use all very conveniently, and be easy to control its heating-up temperature scope, have greatly for industrial quarters installing bearing and benefit.

As shown in Figure 5, this electromagnetic heating magnetic eraser in the U sections heart (10) open end (11), (12) top is provided with a non-magnetic flat board (16), this flat board (16) must only must be able to bear the temperature of heating for bearing the part of one of this U sections heart (10) housing.One magnetic conductivity bowl (17) is placed in this flat board (16) top, two open ends (11) of this U sections heart (10) then, (12) the staggered magnetic line of force φ 1 between, φ 2 will be by this bowl (17) bottom, produce vortex flow and generate heat and respond to this bowl (17), heated whirlpool (17) interior drinking-water or food, its heating-up temperature and time also can be by the voltages of power supply VAC, electric current or frequency shift and adjust, it is very easy that it directly uses AC power to add in the thermal control, need not as electromagnetic oven transfer AC power to complicated control circuit that DC power supply is controlled its power output again, and the present invention is able to easy structure and reaches heating purposes, not only cost of manufacture is low and reduce the failure rate of use significantly, is a splendid heater.

Again as shown in Figure 6, the structure of this electromagnetic heating magnetic eraser is similar to Fig. 5, the proper volume shape is made by system, go up mobile magnetized article (18) at two open ends (11) of this U sections heart, the flat board (16) on (12) top, because of upsetting its magnetic, the effect of staggered magnetic field boundary φ 1, φ 2 distributes, reach the purpose of demagnetization, it can be applicable to audiotape, the rapid demagnetization of video tape are become blank tape, also can be applicable to the rapid demagnetization work of industrial element.

All omit the outward appearance housing according to the above embodiments explanation, but can fully understand the structure and the application thereof of electromagnetic heating magnetic eraser of the present invention, it is widely used in the heating and the demagnetization purposes of industrial and commercial circles and daily life with simple structural design, and be different from existing electromagnetism heating or degaussing gear in the design fully, certainly the foregoing description application only is to illustrate, and the present invention will comprise other equivalent application enforcement.

In sum, the present invention is the new invention of a heating and degaussing gear, and has value on the industry, meets the application for a patent for invention regulation, so propose patent application in accordance with the law.

Claims

1, a kind of electromagnetic heating magnetic eraser, it is characterized in that, comprise that a U sections heart has two upright open ends, this two upright open end respectively is wound with coil, the series connection mutually of one of this two coil end, its other end is connected to an AC power to supply the alternating voltage of preset frequency variation, and this two coil makes two open ends of the U sections heart produce the staggered magnetic line of force that changes simultaneously, generates heat or demagnetizes with the magnetic conductivity object that presets of responding to this place.

2, electromagnetic heating magnetic eraser according to claim 1 is characterized in that, horizontal on these U sections heart two open ends have a straight-bar iron staff, can wear a bearing on this straight-bar iron staff and be heated to predetermined temperature.

3, electromagnetic heating magnetic eraser according to claim 1, it is characterized in that, these U sections heart two open ends are provided with a non-magnetic plate, can respond to this magnetic conductivity vessel bottom heating or make the demagnetization of magnetization article with the staggered magnetic line of force between two open ends for placing magnetic conductivity vessel or magnetized article on this non-magnetic plate.