CN203883579U

CN203883579U - A ventilation structure of a single-bearing permanent magnet generator rotor

Info

Publication number: CN203883579U
Application number: CN201420247805.1U
Authority: CN
Inventors: 夏松谦; 刘忠福; 张国良; 杨正俊
Original assignee: ZHENJIANG DONGFANG KANGCHI ELECTRICAL MANUFACTURING Co Ltd
Current assignee: Jiangsu Dongfang Kangchi Electromechanical Technology Co ltd
Priority date: 2014-05-14
Filing date: 2014-05-14
Publication date: 2014-10-15
Anticipated expiration: 2024-05-14

Abstract

The utility model discloses a ventilation structure of a single-bearing permanent magnet generator rotor. The ventilation device comprises magnetic poles and a permanent magnet rotor. Tow gaps extending in the axial direction of the permanent magnet rotor are formed between the magnetic poles. The ventilation structure also comprises deflectors which are fixed to the permanent magnet rotor and located in the gaps. The deflectors form the deflection angles in line with the rotation direction of a generator from an air inlet end to an air outlet end in the axial direction of the permanent magnet rotor. The ventilation structure is ingenious in design and easy to install, solves the problem of poor ventilation of a permanent magnet rotor, guarantees good heat dissipation performance of the rotor, enables the temperature of the magnetic bodies of the rotor to be kept in an allowable range, and enables the environmental suitability of the generator to be higher and the efficiency of the motor to be higher.

Description

A kind of aeration structure of single-bearing rotor of permanent-magnetic power generator

Technical field

The utility model relates to a kind of aeration structure of generator amature, particularly a kind of aeration structure of single-bearing rotor of permanent-magnetic power generator.

Background technology

Single-bearing generator is mainly connected with power section, rare earth permanent-magnetic generator structure is special, its rotor is outer tabular form permanent-magnet structure, and be screwed in rotor yoke, in order to keep the magnetic flux of permanent magnet, needing permanent magnet to be no more than in temperature under the environment of 80 DEG C works, although the binding end of generator and engine has centrifugal fan, but engine temperature in real work generally all reaches more than 90 DEG C, heat can be conducted to generator rotor shaft by engine crankshaft, thereby strengthen the heat radiation difficulty of rotor, while working long hours generator-temperature detection can with engine temperature balance, thereby can cause magnetic flux to decline, generator output voltage declines, cause generator performance to decline.

Permanent magnet generator internal heat dissipating ventilates and mainly relies on the air gap (generally at 1mm) between stator reserved ventilation hole and stator and rotor, although also have larger space between rotor two magnetic poles in addition, but because two ends of rotor is planar structure, the fan of end and rotor synchronous rotate, air-flow is impossible through the space between rotor two magnetic poles, in the time that generator rotates, space between rotor two magnetic poles has formed an axial nonventilated barrier, therefore cause generator improper ventilation, complete machine heat radiation is bad, generator voltage declines, and unit performance declines.

Utility model content

Utility model object: for the problems referred to above, the purpose of this utility model is to provide a kind of aeration structure of single-bearing rotor of permanent-magnetic power generator, ensures its efficiently radiates heat.

Technical scheme: a kind of aeration structure of single-bearing rotor of permanent-magnetic power generator, comprise magnetic pole, p-m rotor, between described magnetic pole, form two along the axial space of described p-m rotor, also comprise baffler, described baffler is fixed on described p-m rotor and is positioned at described space, and described baffler axially forms the deflection angle consistent with generator direction of rotation from air intake to outlet air end along described p-m rotor.

Described baffler two ends exceed described p-m rotor both ends of the surface, play better drainage and guide effect to air.

Article two, in described space, respectively at least fix a described baffler, air velocity and flow while rotation to increase rotor self, accelerate the heat in rotor permanent magnet to discharge.

Operation principle of the present utility model is: in the time that driven by engine generator amature rotates, air-flow sucks in magnetic pole through the diversed plate of generator afterbody air inlet, and then the diversed plate of air-flow squeezes out rotor region to the other end, then is discharged outside generator by external fan.

Beneficial effect: compared with prior art, the utility model has the advantages that structure is ingenious, install easily, solved the problem of p-m rotor improper ventilation, rotor dispersing good in thermal property, can make rotor magnet temperature keep in allowed limits, make generator environmental suitability stronger, generator efficiency is high.

Brief description of the drawings

Fig. 1 is the utility model end face structure schematic diagram;

Fig. 2 is that Fig. 1 removes A after shell to structural representation;

In figure, filled arrows is air flow, and hollow arrow is that generator amature turns to.

Embodiment

Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment and only be not used in restriction scope of the present utility model for the utility model is described, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present utility model.

As shown in accompanying drawing 1-2, a kind of aeration structure of single-bearing rotor of permanent-magnetic power generator, comprises two magnetic poles 1,2 and p-m rotor 3, and shell 6, baffler 5.

Between two magnetic poles 1,2, on p-m rotor 3, form two larger gaps 4 vertically, the baffler 5 of non-magnet material is placed in gap 4 and is fixed on p-m rotor 3, baffler 5 is provided with certain deflection angle, it axially forms deflection from air intake to outlet air end is consistent with generator direction of rotation along p-m rotor 3, and baffler 5 two ends exceed the both ends of the surface of p-m rotor 3, play drainage and guide effect to air, form flow-disturbing.

Baffler 5 is interior in every space 4 respectively at least fixes one, and air velocity and flow while increasing rotor self rotation, be discharged to by fan the heat producing in rotor permanent magnet outside generator rapidly.

The utility model is to utilize worm screw air compressor principle, in the time that driven by engine generator amature rotates, air-flow sucks in magnetic pole through the diversed plate of generator afterbody air inlet, then the diversed plate of air-flow squeezes out rotor region to the other end, discharged outside generator by external fan again, solve the problem of p-m rotor improper ventilation, so that rotor has good heat dispersion.

Claims

1. the aeration structure of a single-bearing rotor of permanent-magnetic power generator, comprise magnetic pole (1,2), p-m rotor (3), described magnetic pole (1,2) between, form two along the axial space (4) of described p-m rotor (3), it is characterized in that: also comprise baffler (5), described baffler (5) is fixed on described p-m rotor (3) and goes up and be positioned at described space (4), and described baffler (5) axially forms the deflection angle consistent with generator direction of rotation from air intake to outlet air end along described p-m rotor (3).

2. the aeration structure of a kind of single-bearing rotor of permanent-magnetic power generator according to claim 1, is characterized in that: described baffler (5) two ends exceed described p-m rotor (3) both ends of the surface.

3. the aeration structure of a kind of single-bearing rotor of permanent-magnetic power generator according to claim 1, is characterized in that: in two described spaces (4), respectively at least fix a described baffler (5).