CN101777411A

CN101777411A - Magnetizing device

Info

Publication number: CN101777411A
Application number: CN 201010122072
Authority: CN
Inventors: 李冶夫; 陈琛
Original assignee: Ningbo Institute of Material Technology and Engineering of CAS
Current assignee: Ningbo Institute of Material Technology and Engineering of CAS
Priority date: 2010-03-11
Filing date: 2010-03-11
Publication date: 2010-07-14
Anticipated expiration: 2030-03-11
Also published as: CN101777411B

Abstract

The invention discloses a magnetizing device, which comprises a magnetizing coil frame, a magnetizing coil and an external connecting terminal, wherein the magnetizing coil is wound on the magnetizing coil frame tightly; the external connecting terminal is in phase electrical connection with the magnetizing coil; the magnetizing coil comprises a first coil and a second coil of the same radius and number of windings; the space between the first coil and the second coil is equal to the radius of the first coil; the direction of electrified current is the same as that of the second coil; two ends of the first coil and the second coil and the magnetizing area between the two ends generate uniform magnetic fields; the magnetizing coil frame is provided with a hollow cavity; the inside of the cavity is provided with a magnetizing fixture; and the magnetizing fixture fixes a magnetized object at the geometric center position of the first coil and the second coil. Compared with the existing magnetizing device, the magnetizing device can greatly improve the magnetizing drift angle of the magnetized object, thereby satisfying the magnetizing requirement of precision magnetism components with strict requirement on the magnetizing drift angle.

Description

A kind of magnetizer

Technical field

The present invention relates to a kind of magnetizer, especially relate to and be magnetized a kind of magnetizer that body is had relatively high expectations to the drift angle of magnetizing.

Background technology

Traditional magnet magnetizer magnetizes with the magnetic field that single air core solenoid coil produces, and this mode of magnetizing can satisfy industrial most of needs.Utilize magnetizer to give to be magnetized body when magnetizing, be magnetized body be magnetized direction be magnetized the direction that body requires to magnetize can be not in full accord, an angle is arranged between the two, be commonly referred to as the drift angle of magnetizing.The magnetizer that the single air core solenoid coil of traditional usefulness is made is owing to the limitation of air core solenoid coil self, and it is a uniform magnetic field that the magnetic field of generation can not guarantee in the zone of magnetizing, and this is to cause one of the key factor of drift angle that magnetizes.The existence of drift angle of magnetizing has very big influence for the work of some accurate magnetic device, for example be applied in the magnet ring in the accurate magnetic suspension device, if when magnetizing, produce the bigger drift angle of magnetizing, buoyant element finally also can have a tangible drift angle by the relative fixed parts in the magnetic suspension device, this will influence working performance of devices undoubtedly greatly, even cause device to work.

The development of the precision instrument that magnet magnetizing direction consistency is had high requirements along with magnetic suspension device and nulcear magnetic resonance (NMR) etc., the drift angle of magnetizing that how to reduce magnet becomes a great technical barrier of restriction accurate magnetic device development, at present the also solution of neither one system in the world.

Summary of the invention

The technical problem to be solved in the present invention is at existing magnetizer because the inhomogeneous bigger problem in the drift angle of magnetizing that is magnetized body that causes of regional internal magnetic field that magnetizes, a kind of magnetizer is provided, guarantee to produce uniform magnetic field in the zone of magnetizing of magnetizing between coil two ends and the two ends, be magnetized the drift angle of magnetizing of body with improvement, satisfy the requirement of magnetizing that the drift angle of magnetizing is required very strict accurate magnetic device.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of magnetizer, comprise the coil rack that magnetizes, and closely be wrapped in the coil that magnetizes on this coil rack that magnetizes, and the external cabling terminal that is electrically connected with this coil that magnetizes; The coil that magnetizes is made up of two radiuses and identical first coil of the number of turn and second coil, spacing between first coil and second coil equals the radius of first coil, and the electrical current direction in first coil and second coil is identical, produces uniform magnetic field at the two ends of first coil and second coil and the zone of magnetizing between the two ends; The coil rack that magnetizes is shaped on hollow cavity, is provided with magnetizing clamp in this hollow cavity, and magnetizing clamp will be magnetized the geometric center position that body is fixed on first coil and second coil.

For optimizing technique scheme, the measure of taking also comprises:

The first above-mentioned coil is in series with second coil and is connected or the connection that is in parallel.

The periphery of the above-mentioned coil rack that magnetizes is shaped on the groove that first coil and second coil are installed respectively, and first coil and second coil are set in the groove of the coil rack that magnetizes.

Above-mentioned magnetizing clamp comprises the magnetizing clamp end cap, and the magnetizing clamp base matched with described magnetizing clamp end cap is shaped at the face of connecting of magnetizing clamp end cap and magnetizing clamp base and places the groove that is magnetized body.

The outer setting of the above-mentioned coil rack that magnetizes, first coil and second coil is useful on the outer enclosure parts of magnetic screen.

The said external package parts comprise and are used for placing the coil rack that magnetizes, the sealed insulation cover of first coil and second coil, be arranged on the coil cover plate that magnetizes on sealed insulation cover top, be arranged on the coil floor that magnetizes of sealed insulation cover bottom, connect the support column of magnetize the coil cover plate and the coil floor that magnetizes.

The above-mentioned coil rack that magnetizes is made by withstand voltage insulating material.

The above-mentioned coil rack that magnetizes is made by nylon.

Above-mentioned first coil and second coil are made by enamelled wire.

The above-mentioned body that is magnetized is magnet ring or cylindrical magnet.

Compared with prior art, produce a direction and the on all four uniform magnetic field of coil rack axis at the two ends of first coil and second coil and the zone of magnetizing between the two ends when first coil of magnetizer of the present invention and second coil working, the second dervative in its magnetic field is zero.So, to come when being magnetized body and magnetizing with this magnetizer, the drift angle of magnetizing that is magnetized body will be improved greatly, thereby satisfy the requirement that accurate magnetic devices such as magnetic suspension device and nulcear magnetic resonance (NMR) magnetize to magnet.

Description of drawings

Fig. 1 is the general assembly drawing of magnetizer of the present invention;

Fig. 2 is the structure cutaway view of magnetizer shown in Figure 1;

Fig. 3 is the electrical connection graph of magnetizer shown in Figure 1;

Fig. 4 be magnetizer of the present invention magnetize the zone magnetic line of force distribution schematic diagram.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Fig. 1 is to Figure 4 shows that structural representation of the present invention.

Reference numeral wherein is: the coil rack 1 that magnetizes, the first coil 2a, the second coil 2b, magnetizing clamp end cap 3a, magnetizing clamp base 3b, be magnetized body 4, the coil cover plate 5 that magnetizes, the coil floor 6 that magnetizes, support column 7, sealed insulation cover 8, coil lead 9, external cabling terminal 10.

By the structure cutaway view of the general assembly drawing of magnetizer shown in Figure 1 and magnetizer shown in Figure 2 as can be known, this magnetizer comprises the coil rack 1 that magnetizes, and coil and external cabling terminal 9 magnetize.Wherein, the coil rack 1 that magnetizes is the cylinder of hollow; The coil that magnetizes closely is wrapped on the coil rack 1 that magnetizes, the coil that magnetizes is made up of two radiuses and the identical first coil 2a of the number of turn and the second coil 2b, spacing between the first coil 2a and the second coil 2b equals the radius of the first coil 2a, also is the radius of the second coil 2b; Periphery at the coil rack 1 that magnetizes is shaped on the groove that the first coil 2a and the second coil 2b are installed respectively, and the first coil 2a and the second coil 2b are set in the groove of the coil rack 1 that magnetizes.The first coil 2a is identical with electrical current direction in the second coil 2b after giving this magnetizer energising, produces uniform magnetic field at the two ends of the first coil 2a and the second coil 2b and the zone of magnetizing between the two ends.The first coil 2a and the second coil 2b can be connected in series or parallel with one another linking together mutually, and the coil lead 9 at two ends is connected on the external cabling terminal 10.At the hollow space fixed placement magnetizing clamp of the coil rack 1 that magnetizes, it comprises magnetizing clamp end cap 3a and magnetizing clamp base 3b, and this magnetizing clamp end cap 3a and magnetizing clamp base 3b connect mutually, is shaped at the face of connecting and places the groove that is magnetized body 4.Magnetizing clamp will be magnetized the geometric center position that body 4 is fixed on the first coil 2a and the second coil 2b.

For the fastness of protecting this magnetizer and operating personnel's safety, be shaped on the outer enclosure parts in the outside of magnetize coil rack 1, the first coil 2a and the second coil 2b.As shown in Figure 1, the outer enclosure parts comprise and are used to place the sealed insulation cover 8 of coil rack 1, the first coil 2a and the second coil 2b of magnetizing, be arranged on the coil cover plate 5 that magnetizes that sealed insulation overlaps 8 tops, the support column 7 that magnetizes coil floor 6 and connect magnetize the coil cover plate 5 and the coil floor 6 that magnetizes of bottom.The coil lead 9 at the first coil 2a and the second coil 2b two ends is connected on the outside binding post 9 by sealed insulation cover 8.

The first coil 2a, promptly the radius of the second coil 2b is relevant with the size that is magnetized body 4, determine the radius of the first coil 2a according to the size range that is magnetized body 4, be optimized the radius value that obtains the first coil 2a of an optimization after the design then, have the first coil 2a of this radius value and the first coil 2b and can satisfy the requirement of magnetizing that is magnetized body 4 in the above-mentioned size range.

The shape that is magnetized body 4 is not limit, and can be magnet ring, the magnet of cylindrical magnet or other shapes.

Coil rack 1 skeleton that magnetizes needs certain intensity, and the back that prevents to wind the line produces distortion, generally adopts withstand voltage insulating material to make, and is preferably made by withstand voltage insulated nylon.The first coil 2a and the second coil 2b are made by the high material of the withstand voltage class of insulation, are preferably made by enamelled wire.

When giving with this magnetizer when being magnetized body 4 and magnetizing, will be magnetized body 4 and fold up on magnetizing clamp base 3b by magnetizing clamp end cap 3a, guarantee to be magnetized the geometric center position that body 4 is fixed on the first coil 2a and the second coil 2b.Give this magnetizer energising by external power supply, as shown in Figure 3, supply unit output high-tension electricity, carry the pulse current of given intensity to this magnetizer by controller, this pulse current is introduced the first coil 2a and the second coil 2b by binding post 10, and as shown in Figure 4, the zone of magnetizing between the first coil 2a and the second coil 2b two ends and two ends produces uniform magnetic field, the second dervative in this magnetic field reaches zero, is uniform magnetic field very uniformly.

In the present embodiment, being magnetized body is a magnet ring, the radius of the first coil 2a is 100 millimeters, coil use bare wire line directly is 2.12 millimeters a circular enamelled wire, the coil turn of the first coil 2a and the second coil 2b is 76 circles, when the electric current that feeds 2700 amperes, produce the magnetic field intensity of 4 teslas in the zone of magnetizing.The first coil 2a of this size and the second coil 2b can satisfy the magnetize requirement of diameter less than 50 millimeters magnet ring.

Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.

Claims

1. magnetizer, comprise the coil rack that magnetizes (1), closely be wrapped in the coil that magnetizes on this coil rack that magnetizes (1), and the external cabling terminal (10) that is electrically connected with this coil that magnetizes, it is characterized in that: the described coil that magnetizes is made up of with second coil (2b) two radiuses and identical first coil of the number of turn (2a), spacing between first coil (2a) and second coil (2b) equals the radius of first coil (2a), and the electrical current direction in first coil (2a) and second coil (2b) is identical, in the two ends of first coil (2a) and second coil (2b) and the zone generation uniform magnetic field that magnetizes between the two ends; The described coil rack that magnetizes (1) is shaped on hollow cavity, is provided with magnetizing clamp in this hollow cavity, and magnetizing clamp will be magnetized the geometric center position that body (4) is fixed on first coil (2a) and second coil (2b).

2. a kind of magnetizer according to claim 1 is characterized in that: described first coil (2a) is in series with second coil (2b) and is connected or the connection that is in parallel.

3. a kind of magnetizer according to claim 1, it is characterized in that: the periphery of the described coil rack that magnetizes (1) is shaped on the groove that first coil (2a) and second coil (2b) are installed respectively, and described first coil (2a) and second coil (2b) are set in the groove of the coil rack that magnetizes (1).

4. a kind of magnetizer according to claim 1, it is characterized in that: described magnetizing clamp comprises magnetizing clamp end cap (3a), the magnetizing clamp base (3b) matched with described magnetizing clamp end cap (3a) is shaped at the face of connecting of magnetizing clamp end cap (3a) and magnetizing clamp base (3b) and places the groove that is magnetized body (4).

5. according to the described a kind of magnetizer of the arbitrary claim of claim 1 to 4, it is characterized in that: the outer setting of the described coil rack that magnetizes (1), first coil (2a) and second coil (2b) is useful on the outer enclosure parts of magnetic screen.

6. a kind of magnetizer according to claim 5 is characterized in that: described outer enclosure parts comprise sealed insulation cover (8), the coil cover plate (5) that magnetizes that is arranged on sealing insulating case (8) top that is used to place the described coil rack that magnetizes (1), first coil (2a) and second coil (2b), the support column (7) that is arranged on the coil floor that magnetizes (6) of sealing insulating case (8) bottom and is connected magnetize the coil cover plate (5) and coil floor (6) of magnetizing.

7. a kind of magnetizer according to claim 6 is characterized in that: the described coil rack that magnetizes (1) is made by withstand voltage insulating material.

8. a kind of magnetizer according to claim 7 is characterized in that: the described coil rack that magnetizes (1) is made by nylon.

9. a kind of magnetizer according to claim 8 is characterized in that: described first coil (2a) is made by enamelled wire with second coil (2b).

10. a kind of magnetizer according to claim 1 is characterized in that: the described body (4) that is magnetized is magnet ring or cylindrical magnet.