CN1925278B

CN1925278B - Improving structure for compressor motor rotor balancing block

Info

Publication number: CN1925278B
Application number: CN200510014924A
Authority: CN
Inventors: 陈鹏
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2005-08-31
Filing date: 2005-08-31
Publication date: 2010-05-12
Anticipated expiration: 2025-08-31
Also published as: CN1925278A

Abstract

This invention discloses one compressor motor rotor balance block improve structure in arc shape composed upper bench and down bottom bench. Through reducing bottom rack height, it reduces gravity transfer of balance block to reduce quality and copper materials volume.

Description

Improving structure for compressor motor rotor balancing block

Technical field

The present invention relates to compressor, particularly relate to the balance weight of compressor rotor.

Background technology

Compressor is the important composition parts that air conditioner, refrigerator etc. utilize the household electrical appliance of cooling cycle system work.The moving piston of compressor (rolling piston or reciprocating piston) changes mechanical energy into the pressure energy under the drive of motor, realize the compression to the compresser cylinder inner refrigerant.Motor converts electrical energy into the rotary machine energy by the rotation of corresponding component under the current field effect, for the running of compressor provides power.Therefore, motor is the vitals of compressor, and its behavior in service directly influences the function performance of compressor.

In general, motor is made up of stator and rotor two parts, and stator and rotor are made of the iron core that the folded collection of silicon steel core sheet forms respectively.Single stator lamination is circular, and the stator core that is made of the folded collection of lamination is cylindric.Rotor is cylindric, and rotor directly is pressed on the bent axle and inserts in the cylinder cavity of stator core, has air-gap to be separated by between rotor and the stator.Embed the winding of enamelled wire coiled on the stator, stator winding outside source current by the time produce magnetic field.Rotor interacts with stator field when having electric current to pass through, and the generation electromagnetic torque also rotates in stator.

The household electrical appliance that power is slightly little as window air conditioner, wall-hanging air conditioner etc., adopt monophase machine mostly.Be not with the enamelled wire winding on the monophase machine rotor, the electric current in the rotor is not supplied with by external power, but induce by stator field.Induced current and former magnetic field interaction make rotor rotation.

Be moment of torsion that increases rotor and the dynamic balancing of keeping the rotation rotor, additional balance weight on the rotor.Fig. 1 is monophase machine stator and rotor profile schematic diagram.As seen from Figure 1, stator 1 embeds enamelled wire winding 2 in the form of a ring on the stator 1, and the top of rotor 3 is provided with balance weight 4, and balance weight 4 places the outer circumferential edge on rotor 3 tops.Balance weight 4 is set on the rotor 3, increases the moment of torsion of rotor 3.

Fig. 2 shows a kind of concrete structure of motor rotor balance weight.As shown in Figure 2, balance weight is the arcuation body, is made of the convex 5a on top and the collet 6a one of bottom.The intrados of top convex 5a is littler than the intrados radian of bottom collet 6a, and the inward at both ends side of collet 6a is stretched out.The end face of the inward at both ends side extension of collet 6a is the plane, and the central authorities of extension are provided with through hole 7a.The bolt that passes through hole 7a is fixed on balance weight on the rotor of motor.

The intrados 8a of collet 6a and the intrados 9a of convex 5a connect, and the intrados 7a of collet 6a is 180 °, and the intrados 9a of convex 5a is 116 °, and the height of collet 6a is 7.6mm.

The motor rotor balance weight of structure shown in Figure 2 plays an important role for increasing rotor torque and keeping rotor dynamic balancing, but, because balance weight is a copper material, the copper material consumption of the balance weight of the prior art of said structure is bigger than normal, has increased the component materials expense that compressor electric motor is produced.

Summary of the invention

The present invention is directed to the balance weight copper material consumption problem bigger than normal of above-mentioned prior art, improve its structure, by reducing the collet height and reducing collet and the inner face radian of convex makes the out-shift of gravity center of balance weight, thereby make balance weight when moment of torsion is constant, reduce quality, to reduce the copper material consumption of balance weight.

The balance weight of compressor rotor involved in the present invention is the arcuation body, constituting by the convex on top and the collet one of bottom. the inward at both ends side of bottom collet is stretched out. and the end face of the inward at both ends side extension of collet is prominent face, and the central authorities of extension are provided with balance weight is fixed on through hole on the rotor.

The intrados of collet and the intrados of convex connect, and the intrados of collet and convex is little than the intrados radian of prior art balance weight collet shown in Figure 2 and convex, and the height of collet is low than prior art balance weight collet height shown in Figure 2.The intrados of convex is reduced to 76 ° by 116 °, and the height of collet is reduced to 5.0mm by 7.6mm.

Again, the height of collet is low than prior art balance weight collet height shown in Figure 2, therefore, rotor balancing piece out-shift of gravity center involved in the present invention, the center of gravity arm of force increases.

According to torque arithmetic formula: N=m.d, the attach most importance to product of mental and physical efforts arm d and quality m of moment of torsion N can draw, and when moment of torsion was constant, the center of gravity arm of force increased, and quality just reduces.Therefore, rotor balancing piece involved in the present invention can reduce the copper material consumption.Simultaneously, the partial noise that reduces to reduce motor of quality.

Description of drawings

Fig. 1 is monophase machine stator and rotor profile schematic diagram.

Fig. 2 is a kind of motor rotor balance weight structure figure of prior art.

Fig. 3 is that motor rotor balance weight of the present invention improves structure chart.

The drawing description of symbols:

1, stator 2, enamelled wire winding

3, rotor 4, balance weight

5a, 5b, convex 6a, 6b, collet

7a, 7b, through hole 8a, 8b, collet intrados

9a, 9b, convex intrados

Embodiment

Now further specify specific embodiments of the invention in conjunction with the accompanying drawings.

Fig. 3 is that motor rotor balance weight of the present invention improves structure chart.As shown in Figure 3, the balance weight of compressor rotor involved in the present invention is the arcuation body, is made of the convex 5b on top and the collet 6b one of bottom.Bottom collet 6b the inward at both ends side stretch out.The end face of the inward at both ends side extension of collet 6b is prominent face, and the central authorities of extension are provided with through hole 7b.The bolt that passes through hole 7b is fixed on balance weight on the rotor of motor.

The intrados 8b of collet 6b and the intrados 9b of convex 5b connect, and the intrados of collet 6b and the convex 5b intrados radian of balance weight collet and convex compared to prior art is little, and the height of collet 6b balance weight collet height compared to prior art is low.The intrados of convex is reduced to 76 ° by 116 °, and the height of collet is reduced to 5.0mm by 7.6mm.

Claims

1. an improving structure for compressor motor rotor balancing block is made of the convex on top and the collet one of bottom, is the arcuation body, it is characterized in that the intrados of convex is 76 °, and the height of collet is 5.0mm.

2. improving structure for compressor motor rotor balancing block according to claim 1 is characterized in that, the inward at both ends side of collet is stretched out, and the end face of extension is prominent face to the inside.

3. improving structure for compressor motor rotor balancing block according to claim 2 is characterized in that the central authorities of the inward at both ends side extension of collet are provided with through hole.