CN210536436U

CN210536436U - Medium frequency doubling generator set

Info

Publication number: CN210536436U
Application number: CN201921304859.6U
Authority: CN
Inventors: 牟立春
Original assignee: Wuhan Jinyuan Electric Co Ltd
Current assignee: Wuhan Jinyuan Electric Co Ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-05-15
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses a medium frequency doubling generator set, which comprises a base, a power frequency motor and a medium frequency generator, wherein the power frequency motor and the medium frequency generator are fixedly connected with the upper end of the base; the intermediate frequency generator comprises a generator shell, a shell end cover and a protective cover; the shell is sleeved outside the motor shell; the shell end cover is connected with the shell through a screw, and the protective cover is connected to one end of the shell, which is far away from the shell end cover; a rotating shaft, a generator stator, a generator rotor, an alternating current exciter stator, an alternating current exciter rotor, a three-phase bridge rectifier, a voltage regulator and a rotating rectifier are arranged inside the generator shell; the generator stator and the alternating current exciter rotor are arranged on the rotating shaft, the generator stator is connected with the generator rotor and the three-phase bridge rectifier, the three-phase bridge rectifier is connected with the voltage regulator, the voltage regulator is connected with the alternating current exciter stator, and the alternating current exciter stator is connected with the alternating current exciter rotor; the AC exciter rotor is connected to the rotating rectifier.

Description

Medium frequency doubling generator set

Technical Field

The utility model relates to a generator technical field specifically is a well frequency doubling generating set.

Background

The medium frequency doubling generator set consists of a power frequency motor, a medium frequency generator, an alternating current exciter and the like, a coaxial medium frequency brushless synchronous generator with a common shell is driven by a power frequency squirrel-cage asynchronous motor (hereinafter referred to as the power frequency motor) to generate electricity, and a three-phase medium frequency power supply with the frequency close to 150Hz and the voltage of 800V is externally provided; in the conventional medium frequency doubling generator set, after the generator is started, the no-load residual magnetic voltage of the medium frequency generator does not exceed 26V, and the output voltage cannot be continuously adjusted within the range of 26V to 800V.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a well frequency doubling generating set to solve the problem of proposing in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a middle frequency doubling generator set comprises a base, a power frequency motor and a middle frequency generator which are fixedly connected to the upper end of the base, wherein the power frequency motor is connected with the middle frequency generator through a pair of wheels; the intermediate frequency generator comprises a generator shell, a shell end cover and a protective cover; the shell is sleeved outside the motor shell; the shell end cover is connected with the shell through a screw, and the protective cover is connected to one end, far away from the shell end cover, of the shell; a rotating shaft, a generator stator, a generator rotor, an alternating current exciter stator, an alternating current exciter rotor, a three-phase bridge rectifier, a voltage regulator and a rotating rectifier are arranged inside the generator shell; the generator stator and the alternating current exciter rotor are arranged on the rotating shaft, the generator stator is connected with the generator rotor and the three-phase bridge rectifier, the three-phase bridge rectifier is connected with the voltage regulator, the voltage regulator is connected with the alternating current exciter stator, and the alternating current exciter stator is connected with the alternating current exciter rotor; the AC exciter rotor is connected to the rotating rectifier.

Preferably, the generator stator is composed of an iron core, a winding and a winding insulation, the stator iron core is formed by laminating stamped sheets punched by cold-rolled silicon steel plates, and an armature winding is embedded in a groove of the inner circle of the stator iron core.

Preferably, the generator rotor is formed by laminating salient pole type stamped sheets punched by cold-rolled silicon steel plates, and two ends of a coil of the generator rotor are bound by a weftless tape.

Preferably, install the fan in the protection casing, but rapid cooling avoids the generator high temperature, reduces life.

Preferably, the alternating current exciter stator is composed of an iron core, a pole coil and insulation thereof, the iron core is formed by laminating full-circle punching sheets, and the pole coil is a soft coil.

Preferably, the ac exciter rotor is composed of a bracket, an iron core, a winding and insulation thereof, the ac exciter iron core is press-fitted on the bracket, an axle hole of the bracket is matched with an outer circle of the rotating shaft, and is connected with the entire rotor through a key to rotate together, a cover plate is mounted on an outer end face of the bracket, and is connected with the bracket and a corresponding screw hole on an end face of the shaft through a bolt.

Preferably, the shell is provided with a plurality of heat dissipation holes, and the inner cavities of the heat dissipation holes are internally provided with dust screens.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses simple structure has effectively solved intermediate frequency generator output voltage at 26V to 800V within range problem that can not continuous adjustment.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the medium-frequency generator according to the present invention;

fig. 3 is a schematic view of the flow structure of the present invention.

In the figure: 1. a base; 2. a power frequency motor; 3. an intermediate frequency generator; 4. a pair of wheels; 5. a generator housing; 6. a housing; 7. a housing end cap; 8. a generator stator; 9. a generator rotor; 10. a protective cover; 11. an exciter stator; 12. a rotating shaft; 13. an AC exciter rotor; 14. a fan; 15. a weftless tape; 16. a three-phase bridge rectifier; 17. a voltage regulator; 18. a rotating rectifier; 19. heat dissipation holes; 20. a dust screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: a middle frequency doubling generator set comprises a base 1, a power frequency motor 2 and a middle frequency generator 3 which are fixedly connected to the upper end of the base 1, wherein the power frequency motor 2 is connected with the middle frequency generator 3 through a pair of wheels 4; the intermediate frequency generator 3 comprises a generator shell 5, a shell 6, a shell end cover 7 and a protective cover 10; the shell 6 is sleeved outside the motor shell 5; the shell end cover 7 is connected with the shell 6 through screws, and the protective cover 10 is connected to one end, far away from the shell end cover 7, of the shell 6; a rotating shaft 12, a generator stator 8, a generator rotor 9, an alternating current exciter stator 11, an alternating current exciter rotor 13, a three-phase bridge rectifier 16, a voltage regulator 17 and a rotating rectifier 18 are arranged inside the generator shell 5; the generator stator 8 and the alternating current exciter rotor 13 are arranged on the rotating shaft 12, the generator stator 8 is connected with the generator rotor 9 and the three-phase bridge rectifier 16, the three-phase bridge rectifier 16 is connected with the voltage regulator 17, the voltage regulator 17 is connected with the alternating current exciter stator 11, and the alternating current exciter stator 11 is connected with the alternating current exciter rotor 13; the ac exciter rotor 13 is connected to a rotating rectifier 18.

Preferably, the generator stator 8 is composed of an iron core, a winding and a winding insulation, the stator iron core is formed by laminating stamped sheets punched by a cold-rolled silicon steel plate, and an armature winding is embedded in a groove of an inner circle of the stator iron core.

Preferably, the generator rotor 9 is formed by laminating salient pole type stamped sheets punched by cold-rolled silicon steel plates, and two ends of a coil of the generator rotor 9 are bound by a weftless tape 15.

Preferably, a fan 14 is installed in the hood 10.

Preferably, the ac exciter stator 11 is composed of an iron core, a pole coil and an insulation, the iron core is formed by laminating full-circle stamped sheets, and the pole coil is a soft coil.

Preferably, the ac exciter rotor 13 is composed of a bracket, an iron core, a winding and insulation thereof, the ac exciter iron core is press-fitted on the bracket, and a shaft hole of the bracket is engaged with an outer circle of the rotating shaft, and is coupled by a key to rotate together with the entire rotor. The outer end face of the bracket is provided with a cover plate which is connected with the bracket and the corresponding screw holes of the shaft end face by bolts.

Preferably, the housing 6 is provided with a plurality of rod heat dissipation holes 19, and a dust screen 20 is arranged in the inner cavity of each heat dissipation hole 19.

The working principle is as follows: when the generator is used, after the direct start or the Y-delta start, the rotating speed of the generator is close to the rated rotating speed, the potential induced by the three-phase fundamental wave auxiliary winding on the stator of the power frequency motor 2 is rectified into direct current through the three-phase bridge rectifier 16 and provides excitation for the winding of the alternating current exciter stator 11 through the voltage regulator 17, the three-phase symmetrical winding on the alternating current exciter rotor 14 generates three-phase symmetrical potential, the three-phase symmetrical potential is rectified into direct current through the rotating rectifier 18 and then is supplied to the magnetic field winding of the intermediate frequency generator 3, the intermediate frequency generator 3 generates electricity, the output voltage of the generator is gradually increased or decreased by adjusting the voltage setting potentiometer externally connected with the voltage regulator 17 after the intermediate frequency generator 3 generates electricity, and the problem that the output voltage of the intermediate frequency generator cannot be continuously regulated within. After the intermediate frequency generator 3 generates electricity, heat is generated, the heat is dissipated through the heat dissipation hole 19, and the heat is further dissipated through the fan 14, so that the phenomenon that the generator is damaged due to overhigh heat of the intermediate frequency generator 3 is avoided, and the service life of the generator is shortened.

It is worth noting that: whole device passes through the button and realizes control to it, because the equipment that the button matches is equipment commonly used, belongs to current well-done technology, no longer gives unnecessary details its electric connection relation and specific circuit structure again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The medium frequency doubling generator set is characterized by comprising a base (1), a power frequency motor (2) and a medium frequency generator (3) which are fixedly connected to the upper end of the base (1), wherein the power frequency motor (2) is connected with the medium frequency generator (3) through a pair of wheels (4); the medium-frequency generator (3) comprises a generator shell (5), a shell (6), a shell end cover (7) and a protective cover (10); the shell (6) is sleeved outside the motor shell (5); the shell end cover (7) is connected with the shell (6) through screws, and the protective cover (10) is connected to one end, far away from the shell end cover (7), of the shell (6); a rotating shaft (12), a generator stator (8), a generator rotor (9), an alternating current exciter stator (11), an alternating current exciter rotor (13), a three-phase bridge rectifier (16), a voltage regulator (17) and a rotary rectifier (18) are arranged in the generator shell (5); the generator stator (8) and the alternating current exciter rotor (13) are arranged on the rotating shaft (12), the generator stator (8) is connected with the generator rotor (9) and the three-phase bridge rectifier (16), the three-phase bridge rectifier (16) is connected with the voltage regulator (17), the voltage regulator (17) is connected with the alternating current exciter stator (11), and the alternating current exciter stator (11) is connected with the alternating current exciter rotor (13); the AC exciter rotor (13) is connected to a rotating rectifier (18).

2. The medium frequency doubling generator set according to claim 1, wherein: the generator stator (8) is composed of an iron core, a winding and a winding insulator, the stator iron core is formed by laminating stamped sheets punched by cold-rolled silicon steel plates, and an armature winding is embedded in a groove of the inner circle of the stator iron core.

3. The medium frequency doubling generator set according to claim 1, wherein: the generator rotor (9) is formed by laminating salient pole type punching sheets punched by cold-rolled silicon steel plates, and two ends of a coil of the generator rotor (9) are bound by a weftless tape (15).

4. The medium frequency doubling generator set according to claim 1, wherein: a fan (14) is arranged in the protective cover (10).

5. The medium frequency doubling generator set according to claim 1, wherein: the alternating current exciter stator (11) is composed of an iron core, a magnetic pole coil and insulation, the iron core is formed by laminating full-circle punching sheets, and the magnetic pole coil is a soft coil.

6. The medium frequency doubling generator set according to claim 5, wherein: the alternating current exciter rotor (13) is composed of a support, an iron core, a winding and insulation of the winding, the alternating current exciter iron core is pressed on the support, a shaft hole of the support is matched with the excircle of the rotating shaft and is connected with the whole rotor through a key, a cover plate is arranged on the outer end face of the support, and the cover plate is connected with the support and corresponding screw holes of the end face of the shaft through bolts.

7. The medium frequency doubling generator set according to claim 5, wherein: a plurality of rod heat dissipation holes (19) are formed in the shell (6), and a dust screen (20) is arranged in the inner cavity of each heat dissipation hole (19).