CN202978646U - Brushless synchronous generator with overheating alarm - Google Patents

Abstract

The utility model relates to a generator field especially relates to a brushless synchronous generator. The utility model provides an overheated warning brushless synchronous generator, includes casing, pivot, generator stator, generator rotor, exciter stator, exciter armature, rotary rectifier and terminal box, the casing is passed in the pivot, generator rotor, exciter armature and rotary rectifier fixed mounting in order backward in the past are in the pivot, generator stator and exciter stator fixed mounting are in the casing, and generator stator and generator rotor cooperate, and exciter stator and exciter armature cooperate, terminal box fixed mounting is outside the casing, the casing internal fixation is equipped with the temperature probe, the temperature probe sets up between generator stator and exciter stator. The utility model discloses overheated warning brushless synchronous generator's the interior temperature probe that sets up, once the inside high temperature of generator, alarm signal is sent out at once to the alarm, has guaranteed the reliability of motor work.

Description

Brushless synchronous generator with overheating alarm

technical field

The utility model relates to the field of generators, in particular to a brushless synchronous generator.

Background technique

Because electric energy has the advantages of relatively economical production and transformation, relatively easy transmission and distribution, and convenient use and control, it has become the most commonly used energy source in modern times. And with the continuous development of the national economy, the degree of automation is getting higher and higher, and the demand for electricity is increasing. Not only the quantity of electricity consumption is required, but also the quality of electricity consumption is required, which undoubtedly affects the performance of synchronous generators. made high demands. The excitation method directly affects the performance, reliability and technical requirements of the generator, so the research on the excitation method has become an important topic in the development of the motor. Originally, DC generators were used for excitation, that is, DC generators were used to generate direct current, and the rotors of synchronous generators were introduced along the ring and brushes. However, with the continuous increase of motor capacity, the commutation of DC motors has been Becomes a big problem and requires carbon brushes and rings, there are carbon brush wear and carbon brush dust pollution coil insulation and other parts problems.

The brushless synchronous generator is composed of main generator, AC exciter, rotary rectifier and other main parts. The rotor of the main generator, the armature of the exciter and the rotary rectifier are all installed on the same shaft to rotate together. Due to the material relationship, the diameter of the rotor is strictly controlled. Generally, it cannot exceed 1.2 meters. The length of the rotor body is limited by the critical speed. When the length of the body reaches more than 6 times the diameter, the second critical speed of the rotor will be close to the running speed of the motor, and larger vibrations may occur during operation. Therefore, the size of the large high-speed generator rotor is strictly limited. The rotor size of the air-cooled motor of about 100,000 kilowatts has reached the above-mentioned limit size. To increase the motor capacity, it can only be realized by increasing the electromagnetic load of the motor. For this reason, the cooling of the motor must be strengthened. The cooling capacity directly determines the size of the large generator. maximum capacity.

Contents of the invention

The technical problem to be solved by the utility model is to provide a brushless synchronous generator with an overheating alarm. A temperature measuring probe is installed in the generator. Once the internal temperature of the generator is too high, the alarm will immediately send out an alarm signal, ensuring the smooth operation of the motor. reliability.

The utility model is realized in the following way: a brushless synchronous generator with overheating alarm, including a casing, a rotating shaft, a generator stator, a generator rotor, an exciter stator, an exciter armature, a rotary rectifier and a junction box. Through the casing, the generator rotor, exciter armature and rotating rectifier are fixedly installed on the rotating shaft in sequence from front to back, the generator stator and exciter stator are fixedly installed in the casing, and the generator stator and generator rotor The stator of the exciter is matched with the armature of the exciter, the junction box is fixedly installed outside the casing, and a temperature measuring probe is fixed inside the casing, and the temperature measuring probe is arranged between the stator of the generator and the stator of the exciter. between.

The casing is provided with cooling vents.

The front end of the rotating shaft is connected with the connecting steel sheet through a coupling.

The front and rear ends of the casing are respectively provided with a front end cover and a rear end cover, and the rotating shaft is connected with the front end cover and the rear end cover through bearings.

A fan is also fixedly installed on the rotating shaft, and the fan is arranged in the casing, and the blowing surface of the fan faces the generator stator and the generator rotor.

The junction box is equipped with an excitation regulator.

The junction box is fixedly installed on the top of the casing.

The brushless synchronous generator with overheating alarm of the utility model is provided with a temperature measuring probe, once the internal temperature of the generator is too high, the alarm immediately sends out an alarm signal, which ensures the reliability of the motor operation.

Description of drawings

Fig. 1 is a structural schematic diagram of a brushless synchronous generator with an overheating alarm of the present invention.

In the figure: 1 casing, 2 front end cover, 3 rear end cover, 4 rotating shaft, 5 generator stator, 6 generator rotor, 7 exciter stator, 8 exciter armature, 9 rotary rectifier, 10 junction box, 11 movable gear Plate, 12 coupling, 13 connecting steel sheet, 14 excitation regulator, 15 fan, 16 temperature measuring probe.

Detailed ways

Below in conjunction with specific embodiment, further set forth the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the content of the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Example 1

As shown in Figure 1, a brushless synchronous generator with an overheating alarm includes a casing 1, a rotating shaft 4, a generator stator 5, a generator rotor 6, an exciter stator 7, an exciter armature 8, a rotating rectifier 9 and a junction box 10. The rotating shaft 4 passes through the casing 1, the generator rotor 6, the exciter armature 8 and the rotating rectifier 9 are fixedly installed on the rotating shaft 4 from front to back, and the generator stator 5 and the exciter stator 7 Fixedly installed in the casing 1, the generator stator 5 cooperates with the generator rotor 6, the exciter stator 7 cooperates with the exciter armature 8, the junction box 10 is fixedly installed outside the casing 1, and the casing 1 A temperature measuring probe 16 is fixed inside, and the temperature measuring probe 16 is arranged between the generator stator 5 and the exciter stator 7 .

In this embodiment, the casing 1 is provided with a cooling vent 11 .

The utility model can be further described as, the front end of the rotating shaft 4 is connected with the connecting steel sheet 13 through the coupling 12, and the connecting steel sheet 13 is connected with a diesel engine or a steam turbine to drive the rotating shaft 4 to rotate and generate electricity.

In this embodiment, the front and rear ends of the casing 1 are provided with a front end cover 2 and a rear end cover 3 respectively, and the rotating shaft 4 is connected with the front end cover 2 and the rear end cover 3 through bearings.

In this embodiment, in order to ensure the heat dissipation effect inside the motor, a fan 15 is fixedly installed on the rotating shaft 4, and the fan 15 is arranged in the casing 1, and the blowing surface of the fan 15 faces the generator stator 5 and the power generator. Machine rotor 6.

In this embodiment, the junction box 10 is equipped with an excitation regulator 14 .

In this embodiment, the junction box 10 is fixedly installed on the top of the casing 1, and a junction board is installed in the junction box 10 to facilitate the extraction of alternating current.

Claims (7)

1. temperature alarm no-brush synchronous generator, comprise casing (1), rotating shaft (4), generator unit stator (5), generator amature (6), exciter stator (7), armature of exciter (8), rotating rectifier (9) and terminal box (10), casing (1) is passed in described rotating shaft (4), described generator amature (6), armature of exciter (8) and rotating rectifier (9) are fixedly mounted in rotating shaft (4) from front to back in turn, described generator unit stator (5) and exciter stator (7) are fixedly mounted in casing (1), generator unit stator (5) matches with generator amature (6), exciter stator (7) matches with armature of exciter (8), described terminal box (10) is fixedly mounted on outside casing (1), it is characterized in that: temperature probe (16) fixedly is housed in described casing (1), described temperature probe (16) is arranged between generator unit stator (5) and exciter stator (7).

2. temperature alarm no-brush synchronous generator as claimed in claim 1, is characterized in that: be provided with thermovent (11) on described casing (1).

3. temperature alarm no-brush synchronous generator as claimed in claim 1 is characterized in that: the front end of described rotating shaft (4) is connected with connection steel disc (13) by shaft coupling (12).

4. temperature alarm no-brush synchronous generator as claimed in claim 1, it is characterized in that: the rear and front end of described casing (1) is respectively arranged with front end housing (2) and rear end cap (3), is connected by bearing between described rotating shaft (4) and front end housing (2) and rear end cap (3).

5. temperature alarm no-brush synchronous generator as claimed in claim 1, it is characterized in that: fan (15) also fixedly is housed in described rotating shaft (4), described fan (15) is arranged in casing (1), and the blowing of fan (15) is facing to generator unit stator (5) and generator amature (6).

6. temperature alarm no-brush synchronous generator as claimed in claim 1, is characterized in that: field regulator (14) is housed in described terminal box (10).

7. temperature alarm no-brush synchronous generator as claimed in claim 6, it is characterized in that: described terminal box (10) is fixedly mounted on the top of casing (1).

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