CN208820649U - One kind remanufacturing low noise motor - Google Patents

Abstract

The utility model discloses one kind to remanufacture low noise motor, it include: the stator and rotor in motor with mutual cooperation and central axis, the stator includes stator core and winding, it is provided with centre bore, multiple stator tooths around the centre bore on the stator core, is formed with a stator slot between each adjacent two stator tooth；The rotor includes shaft and the rotor body that is formed by stacking by multiple groups rotor core module, the rotor is rotatably arranged in the centre bore, there are multiple magnetic slots around central shaft annular spread, multiple magnets are inserted into respectively in the multiple magnetic slot on the rotor；The stator tooth close to the end of the centre bore be it is arc-shaped, the arc-shaped center of circle is located remotely from the side of the centre bore.The utility model can reduce the operation noise of conventional motors.

Description

One kind remanufacturing low noise motor

Technical field

The utility model relates to motors to remanufacture field, in particular to one kind remanufactures low noise motor.

Background technique

Motor is the driving device of the various equipment such as blower, pump, compressor, lathe, transmission belt, weaving loom, is widely applied It is that the maximum power consumption of electricity consumption is mechanical in multiple industries such as metallurgy, petrochemical industry, chemical industry, coal, building materials, public utility and field.According to Statistical calculation, 2011, about 1,700,000,000 kilowatts of China's motor ownership, about 3,000,000,000,000 kilowatt hour of total power consumption accounted for the total electricity consumption of the whole society The 64% of amount, wherein industrial circle motor total electricity consumption is 2.6 trillion kilowatt hours, accounts for about the 75% of commercial power.

Currently, the problem of there is the following aspects in motor use process.Firstly, being born in motor application operating condition Load rate is often all insufficient, so that electric efficiency is very low.Secondly, asynchronous machine is widely used, asynchronous machine rotor winding can be with hair Hot form consumes part electric energy, which accounts for about the 20%~30% of motor total losses, and the efficiency of motor reduces, while influencing electricity The service life of machine.Meanwhile in inductance current after the conversion to stator winding of rotor windings exciting current, make into stator winding Electric current lags behind one angle of network voltage, and the power factor of motor is caused to reduce.Again, when starting asynchronous motor, it is desirable that electricity Machine has sufficiently large starting torque, but wishes that starting current is not too big, so as not to power grid generate excessive voltage landing and Influence connects the normal operation of other electric machinery and apparatus on power grid.In addition, motor itself will be made when starting current is excessive The impact of power is done by excessive electricity, if often started, the danger for also overheating winding.Therefore, the starting of asynchronous machine is set Meter is often faced with dilemma.

To sum up, that there are power factors is low for conventional asynchronous motor, and motor working efficiency is low, and starting current is big, and it is steady to influence power grid It is fixed, the problem of rotor windings consume electric energy in the form of generating heat, motor service life is impacted etc..Propose permanent magnet synchronous electric The concept of machine, by the way that rotor windings are become p-m rotor, it is synchronous to constitute p-m rotor that is, in the structure of conventional asynchronous motor Motor.Magnetic flux can be provided to motor by p-m rotor, induce electromotive force in the stator windings, reduce exciting current, from And motor power factor both can be improved, motor working efficiency is improved, starting current becomes smaller, and starting torque increases, while can be with The thermal energy consumption of rotor windings is reduced, motor service life is extended, energy-saving effect is prominent.

But in the actual production process, it between permanent magnet and iron core, is bonded by glue, under motor low-speed situations, Glue bonding can be used normally, or the long period can be used, but under motor high-speed case, specifically be greater than When 3500 revs/min, for glue under the effect of huge centrifugal force, while in the case of a high temperature, glue failure leads to permanent magnet It falls, so that magneto breaks down.In practice, the shape cooperation of stator and rotor is bad, will lead to electricity The torque pulsation of machine is big, generates noise.

Utility model content

The technical problem to be solved by the present invention is to provide one kind to remanufacture low noise motor, to reduce conventional motors Run noise.

In order to solve the above-mentioned technical problem, the technical solution of the utility model are as follows:

One kind remanufacturing low noise motor, comprising: there is the stator and rotor of mutual cooperation and central axis in motor, The stator includes stator core and winding, centre bore is provided on the stator core, around the multiple fixed of the centre bore Sub- tooth is formed with a stator slot between each adjacent two stator tooth；The rotor includes shaft and by multiple groups rotor core mould The rotor body that block is formed by stacking, the rotor are rotatably arranged in the centre bore, are had on the rotor around wherein Multiple magnetic slots of mandrel annular spread, multiple magnets are inserted into respectively in the multiple magnetic slot；The stator tooth is close to described The end of centre bore be it is arc-shaped, the arc-shaped center of circle is located remotely from the side of the centre bore.

Preferably, the cross section of the stator tooth further includes two arc-shaped transitions connecting respectively with the two sides of the end Section.

Preferably, the center of circle of described two arc-shaped transition sections is located at the same side close to each other.

Preferably, the both ends of casing are respectively arranged with the drive end bearing bracket and rear end cap being firmly connected with it, the drive end bearing bracket and The center of the rear end cap is respectively arranged with the bearing matched with the shaft.

Preferably, the drive end bearing bracket and the rear end cap are fixedly connected with the both ends of the stator respectively.

Compared with prior art, the utility model has the beneficial effects that: the cooperation of shape can before stator and rotor The harmonic content of air-gap field is reduced, to reduce the electro-magnetic exciting force of harmonic wave generation, and then reduces the torque arteries and veins of conventional motors Dynamic and operation noise.

Detailed description of the invention

Some specific realities of the utility model are described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter Apply example.Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that The drawings are not necessarily drawn to scale.In attached drawing:

Fig. 1 is a kind of schematic diagram for remanufacturing low noise motor of the utility model.

Meaning represented by each symbol is as follows in figure:

1- stator slot；2- stator tooth；3- shaft；4- magnetic slot；The end 5-；6- arc-shaped transition section.

Specific embodiment

Specific embodiment of the present utility model is described further with reference to the accompanying drawing.It should be noted that The explanation of these embodiments is used to help to understand the utility model, but does not constitute the restriction to the utility model.This Outside, technical characteristic involved in the various embodiments of the present invention described below is as long as they do not conflict with each other It can be combined with each other.

As shown in Figure 1, the utility model discloses one kind to remanufacture low noise motor, comprising: mutual cooperation and central axis Coaxial stator and rotor.Rotor is arranged in stator.Rotor body is made of shaft 3 and rotor core module.Before casing End and rear end are respectively provided with drive end bearing bracket and rear end cap, wherein are equipped with and are covered in shaft 3 in the middle part of drive end bearing bracket and middle part and rear end cap On bearing so that bearing is located at the two sides of rotor body.Moreover, the drive end bearing bracket and the rear end cap respectively with it is described fixed The both ends of son are fixedly connected.

Stator includes stator core and winding.Centre bore, multiple stator tooths around centre bore are provided on stator core 2, a stator slot 1 is formed between each adjacent two stator tooth 2.Wherein, stator tooth 2 is circular arc close to the end of centre bore 5 Shape, the arc-shaped center of circle are located remotely from the side of centre bore.The cross section of stator tooth 2 further includes connecting respectively with the two sides of end 5 The two arc-shaped transition sections 6 connect.The center of circle of two arc-shaped transition sections 6 is located at the same side close to each other.Rotor includes 3 He of shaft The rotor body being formed by stacking by multiple groups rotor core module.Rotor is rotatably arranged in centre bore.On rotor have around Multiple magnetic slots 4 of central shaft annular spread.Multiple magnets are inserted into respectively in multiple magnetic slots 4.Therefore, the end of stator tooth 2 Portion 5 realizes the effect for cutting arc, so that stator and rotor engagement run more stable when rotating, winding mmf harmonics content is more It is small.

Therefore, the cooperation of shape can reduce the harmonic content of air-gap field before stator and rotor, to reduce harmonic wave The electro-magnetic exciting force of generation, and then reduce torque pulsation and the operation noise of conventional motors.

The embodiments of the present invention is explained in detail in conjunction with attached drawing above, but the utility model is not limited to be retouched The embodiment stated.For a person skilled in the art, right in the case where not departing from the utility model principle and spirit These embodiments carry out a variety of change, modification, replacement and modification, still fall in the protection scope of the utility model.

Claims (5)

1. one kind remanufactures low noise motor characterized by comprising have in motor and to cooperate and central axis is determined Son and rotor, the stator include stator core and winding, centre bore are provided on the stator core, around the centre bore Multiple stator tooths, be formed with a stator slot between each adjacent two stator tooth；The rotor includes shaft and is turned by multiple groups The rotor body that sub- iron core module is formed by stacking, the rotor are rotatably arranged in the centre bore, are had on the rotor There are multiple magnetic slots around central shaft annular spread, multiple magnets are inserted into respectively in the multiple magnetic slot；The stator tooth Close to the centre bore end be it is arc-shaped, the arc-shaped center of circle is located remotely from the side of the centre bore.

2. one kind according to claim 1 remanufactures low noise motor, which is characterized in that the cross section of the stator tooth is also Including two arc-shaped transition sections being connect respectively with the two sides of the end.

3. one kind according to claim 2 remanufactures low noise motor, which is characterized in that described two arc-shaped transition sections The center of circle is located at the same side close to each other.

4. one kind according to claim 1 remanufactures low noise motor, which is characterized in that the both ends of casing are respectively arranged with The center of the drive end bearing bracket and rear end cap being firmly connected with it, the drive end bearing bracket and the rear end cap is respectively arranged with and the shaft The bearing matched.

5. one kind according to claim 4 remanufactures low noise motor, which is characterized in that the drive end bearing bracket and the rear end Lid is fixedly connected with the both ends of the stator respectively.