CN201252456Y - Flame-proof type permanent-magnetic industrial frequency generator - Google Patents

Abstract

The utility model relates to a flame-proof type permanent-magnetic industrial frequency generator, wherein magnetic wheels are fixed around a rotation shaft, and rare-earth magnetic steel is felted outside the magnetic wheels, wherein the magnetic steel and the magnetic wheels are fixed through screws, the rotation shaft is respectively connected with a flame-proof front end cover and a flame-proof rear end cover through a left and a right bearings, which forms a rotor, and the flame-proof front end cover and the flame-proof rear end cover are screwed with a flame-proof type machine shell, the inner side of the flame-proof type machine shell is corresponding to the position of the rare-earth magnetic steel, a stator is arranged, and the induced voltage of a stator coil is led out through a down-lead device. The generator has the advantages that the generator can be used for various fuel gas environment, the efficiency is high and the consumption is low, the alternating current synchronization type of a structure without brush and actuating coil and with multipole rare-earth permanent-magnetic rotor is adopted, which prevents spark and contact consumption due to adopting a brush and a sliding ring structure by a common alternating generator, improves the safety and the reliability, reduces the frequentative maintenance and prolongs the service life, the weight is reduced by more than 20%, and the generator has the advantages of high power density, low temperature rise and permissibility.

Description

Flame-proof type permanent magnetism power frequency generator

Technical field

The utility model relates to a kind of Blast Furnace Top Gas Recovery Turbine Unit (TRT) that can send industrial-frequency alternating current, particularly a kind of permanent magnetism power frequency generator that has the flame proof effect in the operational environment with hyperpressure, flammable natural gas gas.

Background technology

Present known alternating current generator structure is made up of magnet exciting coil, brush and slip ring structure, under normal circumstances can not produce spark, but in the running power generation process, owing to the damage of internal electric parts, aging, short circuit cause spark, because the loose electric arc that causes of conductive parts, owing to mechanical breakdown and other reason cause generator overload, stall to produce reasons such as high temperature, all can become incendiary source, be not suitable in having hyperpressure, imflammable gas environment, using.

The utility model content

Technical problem of the present utility model is will provide a kind of to be full of natural gas flow and to have the power generator of installing in the pipeline of hyperpressure in West-East National Gas Transmission Project, even the mixture of generator inside produces blast, generator casing does not damage yet, guarantee that internal flame can not pass through the flameproof enclosure faying face, cause blast, the efficient flame-proof type permanent magnetism power frequency generator of extraneous explosion mixture.

In order to solve above technical problem, the utility model provides a kind of flame-proof type permanent magnetism power frequency generator, one rotating shaft periphery is fixed with magnetic conductive iron, outside magnetic conductive iron, be bonded with rare earth magnetic steel, both are again with pressing closer screw, rotating shaft is with two bearings of left and right end, is connected with rear end cap with the explosion-proof type front end housing respectively and carries out rotation; Explosion-proof type front end housing and explosion-proof type rear end cap are connected with explosion-proof type casing screw, and the rare earth magnetic steel position of the inboard respective rotor of explosion-proof type casing is provided with the multiple-grooved stator, and the induced voltage that the coil on the stator produces is drawn by the special leads device.

Described special leads device is to insert one high voltage withstanding, high pressure pipe to lead to explosion-proof type casing inboard on the explosion-proof type casing, and pipe connects a compression type line outlet, inserts a fairlead in the pipe again, is provided with sealing ring between this fairlead and the pipe.

Be provided with sealing ring between described rotating shaft and explosion-proof type front end housing, the explosion-proof type rear end cap.

Described epitrochanterian magnetic conductive iron, rare earth magnetic steel and stator coil are with the embedding of high density epoxy resin.

Superior effect of the present utility model is:

1) the AC synchronous type of employing brushless, no magnet exciting coil, multipole rare-earth permanent magnet rotor structure, spark and the contact loss of having avoided common alternating current generator to adopt brush, slip ring structure to be caused, the fail safe and the reliability of unit have been improved, reduce regular maintenance, prolonged useful life;

2) adopted the optimal design of teeth groove and winding, guaranteed that generator has the less resistance square, harder steady state voltage is adjusted characteristic, good output waveform and reach the Fast starting and the steady purpose of output industrial-frequency alternating current;

3) adopt high density epoxy inserts encapsulation rotor, allow lead, magnet steel and gas-insulated;

4) adopt explosion-proof type casing, the forward and backward end cap of explosion-proof type and axial decompression structure;

5) the generator thread guide devices adopts the sealing of enhancement mode carbon fiber packing, has good, anti-hyperbar of air-tightness and explosion prevention function;

6) with the common generator of power compare: weight saving more than 20%, have very high power density, low temperature rise and explosion-proof;

7) rotor surface is smooth relatively, and the windage loss during rotation reduces greatly, and the static-magnetic pulling force and the moment of resistance are little, starting easily, Fast starting and smooth operation.

Description of drawings

Fig. 1 is an internal view of the present utility model;

The number in the figure explanation

1-rotating shaft; 2-bearing;

3-front end housing; 4-fairlead;

5-screw; 6-stator;

7-rare earth magnetic steel; 8-thread guide devices;

801-pipe; 802-compression type line outlet;

803-sealing ring; 804-fairlead;

9-casing; 10-rotor core.

Embodiment

See also shown in the accompanying drawing, the utility model will be further described.

As shown in Figure 1, the utility model provides a kind of flame-proof type permanent magnetism power frequency generator, one rotating shaft, 1 periphery is fixed with rotor core 10, be bonded with multipole rare earth magnetic steel 7 outside the rotor core 10, both are fixing with screw 5, rotating shaft 1 is connected with rear end cap with explosion-proof type front end housing 3 respectively with two bearings 2 of left and right end, constitutes to rotate; Explosion-proof type front end housing 3 and rear end cap are connected with explosion-proof type casing 9 screws, and rare earth magnetic steel 7 positions of explosion-proof type casing 9 inboard respective rotor are provided with stator 6, and the voltage that stator 6 coils produce is drawn by thread guide devices 8.

Described thread guide devices 8, be on explosion-proof type casing 9, to insert one high voltage withstanding, high pressure pipe 801 to lead to explosion-proof type casing 9 inboards, pipe 801 connects a compression type line outlet 802, inserts a fairlead 804 in the pipe 801 again, is provided with sealing ring 803 between this fairlead 804 and the pipe 801.Thread guide devices 8 adopts the sealing of enhancement mode carbon fiber packing, and its function is that the generator electric energy is drawn out to outside the machine in generator, and can bear the test of 6MPa hyperbar and 1500V electric property.

Be provided with sealing ring between described rotating shaft 1 and explosion-proof type front end housing 3, the explosion-proof type rear end cap.

Coil on described rotor core 10 and rare earth magnetic steel 7 and the stator 6 adopts the embedding of high density epoxy resin.

Claims (4)

1, a kind of flame-proof type permanent magnetism power frequency generator is characterized in that:

One rotating shaft periphery is fixed with magnetic conductive iron, is bonded with rare earth magnetic steel outside magnetic conductive iron, and with pressing closer screw, rotating shaft is connected with rear end cap with the explosion-proof type front end housing respectively with two bearings of left and right end again for both, constitutes rotor; Explosion-proof type front end housing and explosion-proof type rear end cap are connected with explosion-proof type casing screw, and the rare earth magnetic steel position of the inboard respective rotor of explosion-proof type casing is provided with stator, and the induced voltage of stator coil is drawn by thread guide devices.

2, by the described flame-proof type permanent magnetism of claim 1 power frequency generator, it is characterized in that:

Described thread guide devices is to insert a pipe to lead to explosion-proof type casing inboard on the explosion-proof type casing, and pipe connects a compression type line outlet, inserts a fairlead in the pipe again, is provided with sealing ring between this fairlead and the pipe.

3, by the described flame-proof type permanent magnetism of claim 1 power frequency generator, it is characterized in that:

Be provided with sealing ring between described rotating shaft and explosion-proof type front end housing, the explosion-proof type rear end cap.

4, by the described flame-proof type permanent magnetism of claim 1 power frequency generator, it is characterized in that:

Described epitrochanterian magnetic conductive iron, rare earth magnetic steel and stator coil are with the embedding of high density epoxy resin.

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