CN201126859Y

CN201126859Y - Connecting structure of aluminum varnished wire and copper wire in aluminum core winding motor

Info

Publication number: CN201126859Y
Application number: CNU2007202014930U
Authority: CN
Inventors: 姚利明
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-28
Filing date: 2007-11-28
Publication date: 2008-10-01
Anticipated expiration: 2017-11-28

Abstract

The utility model discloses a connecting structure for aluminium enamelled wires and copper wires in aluminum-core winding motors, which comprises aluminium enamelled wire winded on the motor stator and leading copper wire in joint portion of the motor. The leading copper wire is provided with tinned layer, depainted aluminium wire 5 on end of the aluminium enamelled wire 2 is winded with leading copper wire 3 and is welded by welding rod containing aluminium-tin. The connecting structure of the utility model has the advantages that electric corrosion can be reduced during utilizing process, service life and quality of the aluminum-core winding motor is improved, connection strength of the copper wire and the aluminium wire which are winded together is improved by welding reinforcement with welding rod containing aluminium-tin, and disconnection is prevented; by covering thermal-shrinkage tube sleeve on the connecting segment, firstly, creepage is prevented and safety hidden troubles are reduced, secondly, contact of water vapour and carbon dioxide in air with the connecting segment aluminium wire are reduced, which further reduces generation of electric corrosion. Therefore, the utility model is provided with good spreading value and utilization value.

Description

The syndeton of aluminium enamel-covered wire and copper cash in a kind of aluminium core winding motor

Technical field

The utility model relates to a kind of aluminium core winding motor, the syndeton of aluminium enamel-covered wire and copper cash in particularly a kind of aluminium core winding motor.

Background technology

For reducing the motor production cost, replace the motor of copper cash to begin gradually to promote with aluminum steel at present, stator winding commonly used is an aluminium enamel-covered wire, electric machine joint part lead-out wire is a copper cash.When directly connecting because of copper, aluminum conductor, the contact-making surface of these two kinds of metals very easily forms electrolyte with under the effect of airborne moisture, carbon dioxide and other impurity, thereby form with aluminium is that negative pole, copper are anodal primary cell, make aluminium produce couple corrosion, cause the contact resistance of copper, aluminium junction to increase.In addition,, be in operation after cold cycling (energising and outage) repeatedly, can make the contact point place produce bigger gap and influence contact, further increased contact resistance because the modulus of elasticity and the thermal coefficient of expansion of copper, aluminium differ greatly.The increase of contact resistance, motor are in operation connecting portion will the temperature rising.Corrosion oxidation will aggravate under the high temperature, produces vicious circle, and quality of connection is further worsened, and causes the contact point temperature too high even accident such as can smolder, burn at last, influences the quality and the useful life of aluminium core winding motor.

Summary of the invention

The technical problems to be solved in the utility model is: provide the syndeton of aluminium enamel-covered wire and copper cash in a kind of aluminium core winding motor that reduces aluminum steel and copper cash tie point generation galvano-cautery, to overcome the deficiencies in the prior art.

The utility model is to constitute like this: the syndeton of aluminium enamel-covered wire and copper cash in a kind of aluminium core winding motor, what it comprised the aluminium enamel-covered wire 2 that is wrapped on the motor stator and motor blank area draws copper cash 3, be characterized in: be provided with tin coating 4 on the copper cash 3 drawing, aluminum steel 5 behind the aluminium enamel-covered wire 2 end depaintings is wrapped in has the drawing on the copper cash 3 of tin coating 4, and welds fixing with containing the aluminium tin solder.

The syndeton of aluminium enamel-covered wire and copper cash is in the above-mentioned aluminium core winding motor, also is with pyrocondensation pipe box 1 outside aluminium enamel-covered wire 2 and the welding canned paragraph of drawing copper cash 3.

Compared with prior art, the utility model is by zinc-plated drawing on the copper cash of aluminium core winding motor blank area, again the aluminium enamel-covered wire behind the depainting is wrapped on the copper cash after zinc-plated, because of the metal activity of tin between copper and aluminium, so in use just can reduce the generation of galvano-cautery phenomenon; Improve the useful life and the quality of aluminium core winding motor; And tin plating technique is simple relatively in processing technology.The copper cash and the aluminum steel that are intertwined are carried out the bonding strength that reinforcement of weld can improve copper cash and aluminum steel like this with containing the aluminium tin solder, prevent that tie point from disconnecting; Socket pyrocondensation pipe box on the linkage section, first can prevent electric leakage, reduces potential safety hazard, second can reduce contacting of water in air steam and carbon dioxide etc. and linkage section aluminum steel, can further reduce the generation of galvano-cautery phenomenon.Therefore this practicality has the excellent popularization value and use value.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Embodiment of the present utility model: structure of the present utility model as shown in Figure 1, aluminium core winding motor is wrapped in that enamelled wire is an aluminium enamel-covered wire 2 on the motor stator, aluminium core winding motor blank area draw lead for drawing copper cash 3, for reducing galvano-cautery, drawing plating layer of metal tin on the copper cash 3 earlier, form tin coating 4, the depainting processing is carried out in aluminium enamel-covered wire 2 ends that will be wrapped in again on the motor stator, the aluminum steel 5 of removing insulating varnish is spirally wound on draws the position that tin coating 4 is arranged on the copper cash 3, be to improve bonding strength, will be wrapped in the aluminum steel 5 of drawing on copper cash 3 tin coatings 4 and weld fixing with containing the aluminium tin solder.Simultaneously for preventing electric leakage, water vapour in the air-isolation and carbon dioxide etc. contact with depainting section aluminum steel, exposed portion can carry out conventional insulation processing at aluminium enamel-covered wire 2 and the electric wire of drawing copper cash 3, and reasonable is to make it be subjected to the pyrocondensation pipe box 1 with insulation property of thermal contraction in aluminium enamel-covered wire 2 and the electric wire exposed part socket of drawing copper cash 3 by firing equipments such as hair dryer, baking oven, pyrocondensation machines.

Claims

1. the syndeton of aluminium enamel-covered wire and copper cash in the aluminium core winding motor, what it comprised the aluminium enamel-covered wire (2) that is wrapped on the motor stator and motor blank area draws copper cash (3), it is characterized in that: be provided with tin coating (4) on the copper cash (3) drawing, the aluminum steel (5) behind the depainting of aluminium enamel-covered wire (2) end with draw that copper cash (3) is intertwined and connected and fixing through containing the welding of aluminium tin solder.

2. the syndeton of aluminium enamel-covered wire and copper cash in the aluminium core winding motor according to claim 1 is characterized in that: be with pyrocondensation pipe box (1) at aluminium enamel-covered wire (2) and the welding canned paragraph of drawing copper cash (3).