CN2904438Y

CN2904438Y - Full aluminium cast permanent magnetic rotor for permanent magnetic motor

Info

Publication number: CN2904438Y
Application number: CN 200620113415
Authority: CN
Inventors: 刘洪预
Original assignee: Individual
Current assignee: Wang Qinghua
Priority date: 2006-04-29
Filing date: 2006-04-29
Publication date: 2007-05-23
Anticipated expiration: 2016-04-29

Abstract

An integral cast aluminum permanent magnet motor of a permanent magnet rotor comprises a shaft, a separable magnetic pole, a magnet and a cage. The separable magnetic pole is distributed uniformly along the circumference around the shaft, a tangential magnetizing magnet is located among the separable magnetic poles, and the cast aluminum is arranged between the shaft and the separable magnetic pole being. The cage composed of the cast aluminum connects the cage and the separable magnetic pole very firmly. The structure of this utility mode of the permanent magnet rotor and the integral cast aluminum makes the effective utilization of the separable magnetic pole without any leaking magnetic circuit among each magnetic pole, improving the utilization ratio of the Permanent Magnetic Materials and the magnetic flux of per grade, making the motor having greater output and better energy index. The cage got by the cast aluminum comprises a septal magnetic set, a stiffener, a rotor-bar, an end-ring and other effective parts, connecting the whole rotor firmly, improving the stiffness and durability of the whole rotor. The cast aluminum structure omitted the processing of the septal magnetic set and the welding of the rotor-bar and ending-ring, saving the material cost and processing cost, improving the production efficiency.

Description

The full cast aluminium p-m rotor of magneto

Technical field

The utility model relates to a kind of p-m rotor of full cast aluminium, is mainly used in permanent magnet synchronous motor, DC permanent-magnetic brushless machine and magneto alternator etc.

Background technology

In various magnetoes, the structure of p-m rotor has a variety of at present, and wherein split type field structure is a kind of version commonly used.This rotor is by rotating shaft, split type magnetic pole, and magnetic patch, magnetism-isolating loop and sliver and end ring are formed.Magnetism-isolating loop with non-magnetic material (brass or stainless steel) through the machining moulding.Magnetic pole and magnetism-isolating loop interconnect with welding procedure or by the dovetail tongue-and-groove, and sliver and end ring form by welding procedure with the red copper material.From structure and process aspect, the major defect of this rotor is: the material cost height, and processing and assembly technology complexity, workload is big, and overall stiffness is poor.

Summary of the invention

The utility model provides a kind of full cast aluminium p-m rotor of magneto, to solve the material cost height that prior art exists, processes and the assembly technology complexity, and workload is big, the problem of overall stiffness difference.

The technical solution of the utility model is: the utility model is by rotating shaft, split type magnetic pole, and the cover cage that magnet and whole cast aluminium form is formed, and split type magnetic pole evenly distributes in rotor circumference, and the relative two sides of adjacent pole is parallel to each other.Midfeather is placed magnet, and certain interval is arranged between magnetic pole internal diameter and rotating shaft, has been full of separated magnetic effect by cast aluminium.

Described whole aluminum process method, it is characterized in that being placed in rotating shaft and split type magnetic pole in the die cavity of cast-aluminum die by design size, in the interval of per two magnetic poles, place core with the magnet same cross-sectional, the diameter of cast aluminium die cavity is identical with the design root diameter, the axial length of cast aluminium die cavity makes magnetic pole two ends to die cavity both ends of the surface that certain space be arranged than the long certain distance of magnetic pole.The aluminium alloy that uses behind the cast aluminium can be full of whole cast aluminium die cavity, and with rotating shaft, magnetic pole is tightened to an integral body, and corresponding space has formed magnetism-isolating loop, reinforcement, sliver and end ring.The various piece that interconnects all cast aluminiums is referred to as the cover cage.

Described split type magnetic pole is characterized in that magnetic pole is formed by the pole piece closed assembly of sheet metal through the stamping-out moulding.Near the pears type hole that some is arranged the cylindrical on the pole piece forms sliver during for cast aluminium.In interior round centerline long shape hole is arranged, form reinforcement usefulness during for cast aluminium, and can reduce the reactance of Q axle.

The p-m rotor of this full cast aluminium structure and the structure of whole cast aluminium make that split type magnetic pole is effectively utilized, the leakage magnetic circuit that forms without any permeability magnetic material between each magnetic pole, improved the utilance of permanent magnetic material, improved every grade of magnetic flux, made motor that bigger exerting oneself and better energy index be arranged.The cover cage that cast aluminium obtains has comprised magnetic shield, reinforcement, and sliver, each live part such as end ring, and whole rotor firmly connected together, improved the rigidity of whole rotor and the durability of structure.The cast aluminium structure has saved the processing of magnetic shield and the welding of sliver end ring, saves Master Cost and processing charges, effectively reduces product cost, enhances productivity.

Description of drawings

Fig. 1 is the profile schematic perspective view of the utility model p-m rotor;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 is the cover cage three-dimensional shape schematic diagram that cast aluminium of the present utility model forms;

Fig. 4 is the view of cover cage section among Fig. 3;

Fig. 5 is the split type pole lamination shape of a utility model schematic diagram;

Fig. 6 is a magnet structure schematic diagram of the present utility model.

Embodiment

Referring to Fig. 1 to Fig. 6, the utility model p-m rotor primary structure is made up of rotating shaft 7, magnet 1, magnetic pole 2 and cover cage 9.Concrete structure composing method is: design the cast-aluminum die that cylindrical cavity is arranged, the diameter of die cavity is identical with rotor diameter, and the aspect ratio magnetic pole length of die cavity is longer.Rotating shaft 7 is fixed to the center of die cavity, and split type magnetic pole 2 evenly is placed in the circumference of die cavity.In respective rotor, place the position of magnet 1, put into section and the identical core in magnet 1 cross section.The core height is not less than the die cavity height.Magnetic pole 2 two ends are identical with die cavity two ends distance.In die cavity, inject the aluminium alloy that requires with suitable cast aluminium method.Therefore aluminium alloy can be full of all spaces of cast aluminium die cavity, and rotating shaft 7, split type magnetic pole 2 are connected into an integral body securely.After removing cast-aluminum die, the core of respective magnet 1 position is extracted out, embedded the magnet behind the magnetic of substituting the bad for the good, p-m rotor has just been finished substantially, and rotor profile as shown in Figure 1.

Fig. 2 is the sectional drawing of the utility model p-m rotor.Split type magnetic pole 2 be evenly distributed on rotating shaft 7 around.The space that split type magnetic pole 2 and rotating shaft are 7 is full of by aluminium alloy, form magnetic shield 5, the slotted hole of magnetic pole 2 centers is full of aluminium alloy and forms dowel 6, magnetic pole is firmly fixing, pears type hole is full of aluminium alloy formation sliver 3 in the magnetic pole cylindrical, be magnet 1 between two magnetic poles, the space between magnet 1 and the rotor cylindrical also is full of by aluminium alloy and forms press strip 4, and the aluminium alloy at magnetic pole two ends becomes end ring 8.

Whole cover cages 9 that are called of all cast aluminium parts, its structure as shown in Figure 3 and Figure 4.

The punching shape of split type magnetic pole 2 as shown in Figure 5.Its outer inner round side has for forming the pears type hole that sliver is used, and has on the interior round center line for forming the long shape hole that reinforcement is used, and the reinforcement that cast aluminium forms in the hole can guarantee that split type magnetic pole 2 is fixing with rotating shaft 7 reliably.

Magnet 1 as shown in Figure 6, magnet dash the tangential direction that magnetic direction is a rotor, adjacent two magnet same polarities are relative.

Claims

1. the full cast aluminium p-m rotor of a magneto, comprise rotating shaft, split type magnetic pole, magnet and conductor, it is characterized in that, described conductor is the cover cage, described split type magnetic pole evenly distributes along circumference around rotating shaft, laying the magnet of cutting orientation magnetizing between split type magnetic pole, is cast aluminium between rotating shaft and the split type magnetic pole, and the cover cage that this cast aluminium constitutes links together rotating shaft and split type magnetic pole securely.

2. the full cast aluminium p-m rotor of magneto according to claim 1, it is characterized in that, described cover cage comprises magnetic shield, dowel, sliver and end ring, slotted hole in the center of described split type magnetic pole is full of aluminium alloy and forms dowel, split type magnetic pole is firmly fixing, pears type hole is full of aluminium alloy formation sliver in the split type magnetic pole cylindrical, insert magnet between the two adjacent split type magnetic poles, space between this magnet and the rotor cylindrical also is full of the formation press strip by aluminium alloy, and the aluminium alloy at magnetic pole two ends becomes end ring.

3. the full cast aluminium permanent magnetism of magneto according to claim 1 and 2 changes, it is characterized in that, described split type magnetic pole is formed by the pole lamination closed assembly of sheet metal stamping-out, and the pears type hole of using for sliver is arranged in the pole lamination cylindrical, and centerline has the long shape hole of using for dowel.