CN202034855U

CN202034855U - Hybrid cooling heat radiation structure of synchronous generator permanent magnet rotor

Info

Publication number: CN202034855U
Application number: CN2010206470830U
Authority: CN
Inventors: 余虹锦
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-08
Filing date: 2010-12-08
Publication date: 2011-11-09
Anticipated expiration: 2020-12-08

Abstract

The utility model relates to a hybrid cooling heat radiation structure of a synchronous generator permanent magnet rotor. The hybrid cooling heat radiation structure adopts the mode of forced air cooling plus self-circulating water cooling, and can be used for the cooling of a rare earth permanent magnet rotor of a magneto type gasoline generating set. The hybrid cooling heat radiation structure is characterized in that the two ends of a rotor core 6 arranged on a driving shaft 1 are provided with an axial flow fan 2 and a centrifugal fan 8 which have the forced air cooling function respectively; the inside of the rotor core 6 is provided with rare earth permanent magnets 7 which are arranged in parallel, and the rare earth permanent magnets 7 are provided with built-in cooling water tubes 5 which are made of a metal material; the water tubes are riveted into a sealed pipeline via end connecting tubes 4 at the two ends of the rotor core 6; the pipeline are filled with a proper amount of water to form a self-circulating water path cooling system; when the rotor rotates, the centrifugal force and the temperature difference between the hot water and the cold water drive the internally sealed water to flow along a certain direction so as to form the self-circulating cooling system of the cooling water; the internal heat of the rotor and the magnetic steels are radiated out via the end connecting tubes 4, the end radiation fins 3 which are fixedly arranged, and core radiating ribs 10.

Description

A kind of hybrid cooling heat dissipation structure of synchronous generator p-m rotor

Technical field

The utility model is the hybrid cooling heat dissipation structure of a kind of synchronous generator p-m rotor, this cooling heat dissipation structure adopts " forced air cooling+self-loopa water-cooled " mode to dispel the heat, be applicable to the heat radiation cooling of synchronous motor permanent magnetic rotor, be applied to generator and become combustion engine powered generating set, use as portable power supplies or standby emergent single, three phase mains with gasoline engine or diesel engine are supporting.

Background technology

Rare-earth permanent magnet generator rotor extensively adopts neodymium iron boron NdFeB material as permanent magnet, the NdFeB material has very high remanent magnetism performance Br, higher coercivity H and good magnetic energy product [B.H], the generator of being made by it has very high efficient, good performance, higher characteristics such as reliability, is the inevitable development trend of following generator techniques.But neodymium iron boron NdFeB material also has its tangible weakness: one, the Curie temperature of NdFeB material is not high, and the Curie temperature of Sintered NdFeB is generally about 350 ℃, and this makes that the working temperature of this class magnet is the highest at present and can only adapt to 150 ℃; Two, the temperature coefficient of NdFeB material is bigger, magnetic flux density temperature coefficient α _Br=-0.125%/℃, so its temperature stability is poor slightly.At present, the working temperature grade of domestic sintered NdFeB NdFeB material is divided into 80 ℃ of N series, 100 ℃ of M series, 120 ℃ of H series, 150 ℃ of SH series, temperature grade has determined the cost and price of NdFeB material, is also directly determining the cost of permanent magnet generator.

In sum, the motor of making of NdFeB material is the comparison sensitivity to temperature, the irreversible demagnetization phenomenon appears in the too high permanent magnet that causes easily of electric machine temperature rise during operation, and the temperature of p-m rotor is just determining the Selection and Design of permanent magnet material, thereby also determining the cost height of permanent magnet generator, on design of electrical motor, the temperature of rotor of Nd-Fe-B permanent-magnetic generator is controlled in the working temperature limit value that is lower than regulation for this reason.The p-m rotor temperature of design is low more, and then generator performance is superior more, and its cost is also low more.

The utility model content

The poor slightly problem of temperature stability at existing neodymium iron boron NdFeB existence, the purpose of this utility model is to provide for the minitype permanent magnetism synchronous generator of 1～10kW the hybrid cooling heat dissipation structure of synchronous generator p-m rotor of a kind of employing " forced air cooling+self-loopa water-cooled ", the utility model structure is on the forced air cooling mode basis that generator is used always, it is big to make full use of specific heat of water, the feature that heat absorption capacity is strong, increased self-loopa water-cooled cooling system in generator p-m rotor inside, the heat absorption that produces when rotor of permanent-magnetic power generator is moved is stored in the rotor built-in water-cooling system, and by circulation waterway heat is scattered out from the end, with the rotor temperature rise of effective reduction permanent magnet generator.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of hybrid cooling heat dissipation structure of synchronous generator p-m rotor, it is characterized in that: the cooling heat radiation system that constitutes motor is combined by two parts, and one, be installed on tube-axial fan 2 and centrifugal fan 8 that rotor core 6 two ends that drive in the rotating shaft 1 have been respectively arranged with the forced air cooling effect; Two, be provided with the built-in cooling water pipe made from metal material 5 between each rare-earth permanent magnet 7 that rotor core 6 inside distribute side by side, water pipe is riveted into the pipeline of sealing by 4 welderings of end tube connector at rotor core 6 both ends, charge into the self-circulating water line cooling system that an amount of water constitutes sealing in the pipeline.

The techno-economic effect that technique scheme reached

Use this hybrid cooling heat dissipation structure, can make generator p-m rotor working temperature descend about about 15 ℃～25 ℃, thereby can improve output of a generator indirectly, improve the generator energy conversion efficiency, the reliability and the stability of p-m rotor are further improved, enlarged the range of application of neodymium iron boron NdFeB material at machine field.

Description of drawings

Fig. 1 is that the hybrid cooling heat dissipation axis of no-feathering of synchronous generator p-m rotor that relates to of this patent is to generalized section.

Fig. 2 is the A end face line arrangement schematic diagram of the hybrid cooling heat dissipation structure of synchronous generator p-m rotor shown in Figure 1

Fig. 3 is the B end face line arrangement schematic diagram of the hybrid cooling heat dissipation structure of synchronous generator p-m rotor shown in Figure 1

More than among each figure: 1. drive rotating shaft, 2. tube-axial fan, 3. end fin, 4. end tube connector,

5. built-in cooling water pipe, 6. rotor core, 7. rare earth magnetic steel, 8. centrifugal fan,

9. iron core heat dam, 10. iron core radiating ribs

Embodiment

The hybrid cooling heat dissipation structure of synchronous generator p-m rotor described in the utility model is to reduce the key core of working rotor temperature, this novel mixed cooling heat dissipation structure is applicable to the p-m rotor of " the multi-disc magnet combination becomes a utmost point ", below in conjunction with the drawings and specific embodiments the utility model is described further, as Fig. 1, Fig. 2 and shown in Figure 3:

At first, see shown in Figure 1ly, adopt centrifugal fan 8 to carry out on the basis of forced ventilation cooling, p-m rotor is increased a tube-axial fan 2 again to accelerate cross-ventilation speed at existing rotor, strengthen the forced air cooling effect, two fans are installed on the two ends that drive the rotor core 6 in the rotating shaft 1 respectively;

Second, in Fig. 1, Fig. 2, p-m rotor example shown in Figure 3, p-m rotor inside has increased self-loopa water-cooled cooling system, be provided with the built-in cooling water pipe made from metal pipe material 5 between each rare-earth permanent magnet 7 that rotor core 6 inside distribute side by side, water pipe by the pipeline of being riveted into sealing by 4 welderings of end tube connector, charges into the self-circulating water line cooling system that an amount of water constitutes sealing at rotor core 6 both ends in the pipeline; During rotor operation, the water that the centrifugal force and the hot and cold water temperature difference will be ordered about enclose inside flows by certain orientation, form the self-circulation cooling system of cooling water, rotor and magnet steel internal heat radiate by end tube connector 4, hard-wired end fin 3 and iron core radiating ribs 10;

The 3rd, p-m rotor iron core 6 is near near the air iron core heat dam 9 that is provided with the heat effect of isolation gasoline engine line shaft transmission the driving rotating shaft 1, intermediate location between magnetic pole has been provided with the iron core radiating ribs 10 of the thermolysis of blowing simultaneously, is being provided with the louvre that built-in cooling water pipe 5 is installed near the close rare earth magnet under every magnetic pole.

The 4th, the installation of above-mentioned water-cooled pipe-line system should be arranged in after folded 6 last items of rotor core and before built-in permanent magnet 7 is installed to be carried out, and should carry out the hydraulic pressure leakage test after pipe-line system installs, the overspeed test examination is qualified.

Above-described only is preferred implementation of the present utility model, for a person skilled in the art, under the prerequisite that does not break away from the utility model structure, can also make some distortion and improvement (as improving end pipeline connecting mode etc.), these improvement and distortion can not influence effect and the practical applicability that the utility model is implemented.

Claims

1. the hybrid cooling heat dissipation structure of a synchronous generator p-m rotor, it is characterized in that: the cooling heat radiation system that constitutes motor is combined by two parts, and one, be installed on tube-axial fan (2) and centrifugal fan (8) that rotor core (6) two ends that drive in the rotating shaft (1) have been respectively arranged with the forced air cooling effect; Two, be provided with the built-in cooling water pipe made from metal material (5) between inner each rare-earth permanent magnet (7) that distributes side by side of rotor core (6), water pipe is riveted into the pipeline of sealing by end tube connector (4) weldering at rotor core (6) both ends, charge into the self-circulating water line cooling system that an amount of water constitutes sealing in the pipeline.

2. the hybrid cooling heat dissipation structure of a kind of synchronous generator p-m rotor according to claim 1, its rotor structure feature is that rotor core (6) is near near the air iron core heat dam (9) that is provided with the heat effect of isolation gasoline engine line shaft transmission the driving rotating shaft (1), intermediate location between magnetic pole has been provided with the iron core radiating ribs (10) of the thermolysis of blowing simultaneously, is being provided with the louvre that built-in cooling water pipe (5) is installed near the close rare earth magnet under every magnetic pole.