CN206948061U - A kind of permanent-magnet ferrite rotor - Google Patents

Abstract

The utility model discloses a kind of permanent-magnet ferrite rotor, belong to permanent magnet machine rotor technical field.Including a rotor core, multi-disc permanent-magnet ferrite, rotor core is in regular prism shape, and multiple axially extending bores are opened up evenly and at intervals on rotor core；Permanent-magnet ferrite is in bread shape；The inner plane of each permanent-magnet ferrite is affixed in rotor core respective side, and the side plane of adjacent permanent magnet ferrite mutually fits, and the eccentric extrados that permanent-magnet ferrite two or two abuts is collectively forming dented space；Rotor core is shaped to a unitary rotor jointly with permanent-magnet ferrite by cage type moulding, the cage type moulding takes shape in the end cap portions of the bottom surface of the flank of each dented space, the transverse plane for being overmolded in permanent-magnet ferrite and rotor core by filling up and filling molding forms in the muscle portion of axially extending bore, and the eccentric extrados of its outer peripheral edge profile of rotor and each permanent-magnet ferrite is misaligned.The utility model is fixed and not fallen off persistently reliably, it is ensured that permanent-magnet ferrite rotor exterior magnetic field is sinusoidal waveform.

Description

A kind of permanent-magnet ferrite rotor

【Technical field】

The utility model belongs to permanent magnet machine rotor technical field, is specifically related to a kind of permanent-magnet ferrite rotor.

【Background technology】

Permanent magnet is assembled mostly by way of upper and lower end cap and upper and lower protecting cover together with rotor core and consolidated by rivet Surely PM rotor is turned into, PM rotor has baroque deficiency using end cap, protecting cover and by riveting molding. Wherein, permanent magnet is typically inefficiently fixed to by permanent magnet and being connected for rotor core using adhesive surface-mount type piecewise On the side of rotor core, this surface bonded structure is unfavorable for the maintenance of p-m rotor, and rotor core splits tired with permanent magnet Difficulty or ease are damaged.When need change rotor core when, permanent magnet peel off rotor core during easily undermine it is original-pack can normal work Permanent magnet；And when needing to peel off the permanent magnet of certain piece corrupted, rotor core is easily injured, rotor core will be caused when serious Scrap.Furthermore come off in rotor rotation process because centrifugal force easily causes by the permanent magnet of jelly bonding.

【Utility model content】

The purpose of this utility model is to provide the permanent-magnet ferrite rotor that a kind of fixed permanent is reliable, simple for structure, and it is forever Magnetic ferrites can bear caused big centrifugal force under rotation operating mode at a high speed and not fall off, and ensure rotor exterior magnetic field for just String waveform.

To reach above-mentioned purpose, the utility model provides following technical scheme：

A kind of permanent-magnet ferrite rotor, including a rotor core, multi-disc permanent-magnet ferrite, have at rotor core center Axis hole, its improvement are：The rotor core is in regular prism shape, and opening up multiple axial directions evenly and at intervals on rotor core leads to Hole；The multi-disc permanent-magnet ferrite is in bread shape, each permanent-magnet ferrite be respectively provided with an inner plane, an eccentric extrados, Symmetrical two side planes and symmetrical two transverse planes, the piece number of permanent-magnet ferrite and the number phase of its side of rotor core Deng；The inner plane of each permanent-magnet ferrite is affixed on the corresponding side of rotor core, and the side plane of adjacent permanent magnet ferrite is mutually affixed Close, and the eccentric extrados of two or two adjoinings is collectively forming dented space；Rotor core and the permanent-magnet ferrite for being arranged in its periphery One unitary rotor is shaped to by cage type moulding jointly, wherein, the cage type moulding takes shape in each depression sky by filling up Between flank, be overmolded in the end cap portions and filling molding of the transverse plane of the permanent-magnet ferrite and the bottom surface of rotor core In the muscle portion composition of its axially extending bore of rotor core, two end cap portions are located at the both ends of each flank respectively, and position is distinguished at each flank both ends It is misaligned in the periphery of corresponding end cap portions, the eccentric extrados of its outer peripheral edge profile of rotor and each permanent-magnet ferrite.

It in each bottom surface of regular polygon has 4+2n bars side to above-mentioned rotor core, wherein, n=0~4.

Above-mentioned cage type moulding is non-magnetic.

Compared with prior art, the utility model has the following advantages that and beneficial effect：

1st, permanent-magnet ferrite is set is engaged in bread shape, bread shape permanent-magnet ferrite with the rotor core of regular prism shape, and So that its outer peripheral edge profile of the eccentric extrados and rotor of permanent-magnet ferrite is misaligned, permanent-magnet ferrite structure and rotor core knot Structure can ensure that the utility model rotor exterior magnetic field is sinusoidal waveform.

2nd, by cage type moulding and multi-disc permanent-magnet ferrite, rotor core are fixed-type is integral, the monoblock type turns Minor structure is succinct, fixed permanent is reliable.Wherein, flank plays a part of circumferentially fixed whole permanent-magnet ferrites, and end cap portions play The effect of the radially fixed bottom surface of rotor core two and permanent-magnet ferrite both ends of the surface, muscle portion ensure end cap portions axially and securely with rotor Iron core is fixed, it is seen that and cage type moulding realizes the fixation fastness of unitary rotor from inside to outside, therefore caused by rotor rotation Centrifugal force still ensures that permanent-magnet ferrite continues to be fixed without coming off by reliable, and having abandoned existing riveting molding rotor, it is complicated The deficiency of structure, and permanent magnet need to be adhered to the outer surface of rotor core piecewise with adhesive, can avoid in full rotor Indivedual permanent magnets bonding defect that may be present.

3rd, the utility model permanent-magnet ferrite rotor can be advantageously from the cheap cage type moulding of its external damage cost To realize disassembling for rotor.When that need to be repaired because of rotor core damage, the replacing of rotor core does not undermine can normal work Permanent-magnet ferrite；And when that need to be repaired because of the damage of certain piece permanent-magnet ferrite, it is only necessary to replace that piece permanent magnet of damage Oxysome, rotor core good for use will not be undermined, intact rotor core and intact number can be utilized during injection molding again Permanent-magnet ferrite, be not to scrap whole rotor.

【Brief description of the drawings】

Fig. 1 is the stereogram of rotor core of the present utility model；

Fig. 2 is Fig. 1 top view；

Fig. 3 is the stereogram of permanent-magnet ferrite of the present utility model；

Fig. 4 is the schematic diagram that permanent-magnet ferrite is attached on each side of rotor core；

Fig. 5 is schematically shown outside outer peripheral edge profile (part) line and wherein a piece of its bias of permanent-magnet ferrite of rotor The schematic diagram of circle (part) where cambered surface；

Fig. 6 schematically shows rotor core and the schematic diagram of permanent-magnet ferrite injection；

Fig. 7 is the stereogram of cage type moulding；

Fig. 8 is the schematic diagram that cage type moulding and rotor core, permanent-magnet ferrite are shaped to unitary rotor jointly；

Fig. 9 is the schematic diagram (sinusoidal waveform) of the external magnetic field waveform of hexapole permanent magnet ferrite rotor.

【Embodiment】

Refer to shown in Fig. 1,2,3,4,5,6,7,8, a kind of permanent-magnet ferrite rotor, including rotor core 1, a multi-disc Permanent-magnet ferrite 2, there is axis hole 10 at the center of rotor core 1, its improvement is：Rotor core 1 is in regular prism shape, rotor iron Multiple axially extending bores 100 are opened up on core 1 evenly and at intervals；The multi-disc permanent-magnet ferrite 2 is in bread shape, each permanent-magnet ferrite 2 are respectively provided with 21, eccentric extrados 23 of an inner plane, symmetrical two side planes 24 and symmetrical two transverse planes 22, The number of its side 11 of the piece number with rotor core 1 of permanent-magnet ferrite 2 is equal；The inner plane 21 of each permanent-magnet ferrite 2, which is affixed on, to be turned On sub- 1 corresponding side of iron core, the side plane 24 of adjacent permanent magnet ferrite 2 mutually fits, and the eccentric extrados of two or two adjoinings It is collectively forming dented space 231；Rotor core 1 and be arranged in the permanent-magnet ferrite 2 of its periphery by cage type moulding 3 jointly into Type is a unitary rotor, wherein, the cage type moulding 3 by end cap portions 32, fill up and take shape in the flank of each dented space 231 31 and filling molding formed in the muscle portion 30 of rotor core 1 its axially extending bore 100, two end cap portions 32 are located at each flank 31 respectively Both ends, each both ends of flank 31 are respectively positioned at the periphery of corresponding end cap portions 32, its outer peripheral edge profile of rotor and each permanent-magnet ferrite 2 Eccentric extrados 23 it is misaligned.

Wherein, end cap portions 32 are overmolded in the transverse plane 22 of permanent-magnet ferrite 2 and the bottom surface 12 of rotor core 1.

See Fig. 1,2, the rotor core 1 in the present embodiment is positive six prismsby shape, and the rotor core 1 of the positive six prismsby shape has There are two bottom surfaces 12 and six sides 11, axially extending bore 100 is evenly distributed with six.

Rotor core 1 can be process using prior art, for example, by multi-disc regular hexagon rotor punching after stack Formed in corner welding, the present embodiment rotor core 1 is preferentially obtained using the rotor punching of multi-disc regular hexagon through folded riveting.

Such as Fig. 3,4, the rotor core 1 of a positive six prismsby shape needs the permanent-magnet ferrite 2 of six quantity supporting, permanent magnet Oxysome 2 can be transferred to magnetic material factory to process to obtain by the design requirement.

In the present embodiment, its eccentric place diameter of a circle of extrados 23 of permanent-magnet ferrite 2 is 31.06mm.

Its cage type moulding 3 of the present embodiment hexapole permanent magnet ferrite rotor is by two end cap portions, 32, six flanks 31, the six roots of sensation Muscle portion 30 forms.

As seen from Figure 5, the circular path C2 (not drawing all) and rotor of circle where its eccentric extrados of permanent-magnet ferrite Outer peripheral edge contour line C1 (only drawing half) do not overlap.

The present embodiment permanent-magnet ferrite rotor a diameter of 54mm in its outer peripheral edge.

It in each bottom surface 12 of regular polygon has 4+ (2 × n) bars side to rotor core 1, wherein, n=0~4, n are oneself So number.

In the present embodiment, rotor core 1 is in positive six prismsby shape, and two bottom surfaces 12 of rotor core 1 are regular hexagon, Now n=1.

As n=0, rotor core is in four-prism shape；As n=2, rotor core is prismatic in positive eight；As n=3, Rotor core is prismatic in positive ten；As n=4, rotor core is prismatic in positive 12.

During the specific processing and forming of the utility model permanent-magnet ferrite rotor：See Fig. 4, first by six permanent-magnet ferrites 2 by Piece is attached on six sides 11 of rotor core 1, makes inner plane 21 and the 1 corresponding side of rotor core of every permanent-magnet ferrite 2 Face 11 is bonded, and the side plane 24 of adjacent permanent magnet ferrite 2 mutually fits, then by this six permanent-magnet ferrites 2 and one In one of the mould (not shown) for being put into injection machine of rotor core 1, the external diameter of the internal diameter of its die cavity of mould and rotor to be formed Match somebody with somebody, then injection machine makes molten plastic fill six dented spaces, 231, six axial directions respectively toward pressure injection molten plastic in mould Through hole 100 (six axially extending bores, 100, six dented spaces 231 visible in figure 6 filled molten plastic) in Fig. 4, with And make two transverse planes 22 of molten plastic cladding permanent-magnet ferrite 2 and (Fig. 6 is not shown two bottom surfaces 12 of rotor core 1 Go out), injection finishes is formed as a cage type moulding 3 (see Fig. 7) after the molten plastic cooling and solidifying in die cavity, cage type note Plastic 3 is shaped to unitary rotor jointly with rotor core 1, permanent-magnet ferrite 2, as shown in Figure 8.

When the internal diameter of its die cavity of mould matches with the external diameter of rotor to be formed, the madial wall of die cavity with every permanent magnet oxygen The center (most convex) of its eccentric extrados 23 of body 2 contradicts.

Cage type moulding 3 is non-magnetic, and the present embodiment cage type moulding 3 uses commercially available PBT as raw material.

As seen from Figure 9, the external magnetic field waveform of the utility model embodiment hexapole permanent magnet ferrite rotor is sinusoidal waveform.

Claims (3)

1. a kind of permanent-magnet ferrite rotor, including a rotor core, multi-disc permanent-magnet ferrite, have axle at rotor core center Hole, it is characterised in that：The rotor core is in regular prism shape, and multiple axially extending bores are opened up evenly and at intervals on rotor core；Institute It is in bread shape to state multi-disc permanent-magnet ferrite, and each permanent-magnet ferrite is respectively provided with an an inner plane, eccentric extrados, symmetrical Two side planes and symmetrical two transverse planes, the piece number of permanent-magnet ferrite are equal with the number of its side of rotor core；Respectively forever The inner plane of magnetic ferrites is affixed on the corresponding side of rotor core, and the side plane of adjacent permanent magnet ferrite mutually fits, and two The eccentric extrados of two adjoinings is collectively forming dented space；Rotor core passes through cage type with being arranged in the permanent-magnet ferrite of its periphery Moulding is shaped to a unitary rotor jointly, wherein, the cage type moulding taken shape in by filling up each dented space flank, Be overmolded in the transverse plane of the permanent-magnet ferrite and the bottom surface of rotor core end cap portions and filling molding in rotor iron The muscle portion composition of its axially extending bore of core, two end cap portions are located at the both ends of each flank respectively, and each flank both ends are located at corresponding end respectively The periphery of cap, the eccentric extrados of its outer peripheral edge profile of rotor and each permanent-magnet ferrite are misaligned.

2. permanent-magnet ferrite rotor according to claim 1, it is characterised in that：The rotor core its in regular polygon Each bottom surface has 4+2n bars side, wherein, n=0~4.

3. permanent-magnet ferrite rotor according to claim 1, it is characterised in that：The cage type moulding is non-magnetic 's.