Cooling device for generator exciter

Abstract

The utility model relates to the technical field of excitation motors, in particular to a generator exciter cooling device, which comprises a generator assembly, a volute sight glass of the generator assembly is connected with a cooling pipeline, one end of the cooling pipeline is butted with a cooling fan in a motor assembly, and the other end of the cooling pipeline is connected with an excitation assembly. The generator exciter cooling device has the beneficial effects that the cooling air of the generator assembly is guided to the excitation assembly through the cooling pipeline to cool the excitation assembly, the air quantity passing through the excitation assembly can be controlled through the control valve, and the use effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of excitation motors, in particular to a temperature reduction device for an excitation machine of a generator. Background Art

[0002] During the production process of the power plant, the generator rotor rotates, and the excitation current is mainly transmitted to the rotor winding (excitation winding) through the contact between the carbon brush and the slip ring, generating the generator stator current. When the generator excitation system is operating normally, the temperature of the carbon brush in normal operation is generally 50℃-80℃ (temperature rise of about 40℃), and the heat generated by the carbon brush and the slip ring in operation is taken away by the ventilation system. When the air volume of the ventilation cooling system is small and the resistance of the ventilation system is too large, the operating condition of the carbon brush will deteriorate, the temperature of some carbon brushes will rise, and the temperature of the entire excitation slip ring will rise. When heating, the temperature of the brush and the collector ring is as high as 100℃ or above, and in the most serious case, it reaches 200℃-300℃, causing abnormal beating or jamming of the carbon brush, and a large number of sparks, which gradually develop into fire or ring fire, affecting the normal operation of the generator excitation system, and even burning the slip ring, forcing the unit to shut down.

[0003] At present, there are 4 right-angle bends in the generator excitation cooling air duct. The air outlet resistance of the excitation air duct is too large and the ventilation is poor, which can easily cause the abnormal increase in the temperature of the generator excitation slip ring and carbon brush, resulting in the burning of the generator excitation slip ring. At the same time, the base guard plate of the generator exciter is sealed, which will cause the heat dissipation effect of the excitation machine chamber to be poor, resulting in the heat generated by the excitation carbon brush during operation being difficult to take away, the carbon brush temperature is high, and the service life of the exciter is reduced. At the same time, the workload of equipment maintenance is increased.

[0004] In view of the above-mentioned problem that the exciter has poor heat dissipation effect, which leads to a shortened service life of the exciter and increased equipment maintenance work, a generator exciter cooling device is needed. Summary of the invention

[0005] The utility model proposes a cooling device for a generator exciter to solve the existing problems that the exciter's service life is reduced and equipment maintenance work is increased due to poor heat dissipation effect of the exciter.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is a generator exciter cooling device, including a generator assembly, a turbine housing sight glass of the generator assembly is connected to a cooling pipe, one end of the cooling pipe is connected to the cooling fan in the motor assembly, and the other end of the cooling pipe is connected to the excitation assembly. When in use, the wind of the cooling fan in the generator assembly is guided to the excitation assembly through the cooling pipe to cool the excitation assembly, thereby avoiding the situation where the temperature of the excitation assembly is too high, and the temperature of the excitation assembly is always maintained at a suitable operating temperature, thereby increasing the service life of the excitation assembly and enhancing the use effect.

[0007] Furthermore, the generator assembly is connected to the excitation assembly via a bearing assembly.

[0008] Furthermore, a control valve is provided on the cooling pipeline, and the air volume inside the cooling pipeline can be controlled by the control valve.

[0009] Furthermore, the control valve adopts a manual butterfly valve, which is used to facilitate adjustment of the control valve.

[0010] Furthermore, the cooling pipe adopts a metal pipe.

[0011] Furthermore, the cooling pipe adopts a flexible pipe, and the flexible cooling pipe is adopted to facilitate the installation of the cooling pipe.

[0012] The beneficial effects of the utility model are:

[0013] The utility model guides the heat dissipation wind of the generator assembly to the excitation assembly through the cooling pipeline to cool the excitation assembly, and the air volume passing through the excitation assembly can be controlled by controlling the valve, thereby enhancing the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure: 1. Generator assembly; 2. Bearing assembly; 3. Excitation assembly; 4. Cooling pipe; 5. Control valve. DETAILED DESCRIPTION

[0017] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0018] like Figure 1As shown, in this embodiment, a generator exciter cooling device proposed by the utility model includes a generator assembly 1, which is connected to the excitation assembly 3 through a bearing assembly 2, a cooling pipe 4 is connected to the turbine housing sight glass of the generator assembly 1, and one end of the cooling pipe 4 is connected to the cooling fan inside the generator assembly 1, and the other end of the cooling pipe 4 is connected to the excitation assembly 3, the cooling pipe 4 adopts a flexible metal pipe, and the flexible cooling pipe 4 is adopted to facilitate the installation of the cooling pipe 4, and a control valve 5 is provided on the cooling pipe 4, and the size of the air volume inside the cooling pipe 4 can be controlled by the control valve 5, the control valve 5 adopts a manual butterfly valve, and the manual butterfly valve is used to facilitate the adjustment of the control valve 5, when in use, the wind of the cooling fan in the generator assembly 1 is guided to the excitation assembly 3 through the cooling pipe 4, the excitation assembly 3 is cooled, and the situation that the temperature of the excitation assembly 3 is too high is avoided, so that the temperature of the excitation assembly 3 is always maintained at a suitable working temperature, the service life of the excitation assembly 3 is increased, and the use effect is enhanced.

[0019] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A generator exciter cooling device, comprising a generator assembly (1), characterized in that: A cooling pipe (4) is connected to the turbine housing sight glass of the generator assembly (1); one end of the cooling pipe (4) is connected to a cooling fan in the generator assembly (1); and the other end of the cooling pipe (4) is connected to the excitation assembly (3).

2. The generator exciter cooling device according to claim 1, characterized in that: The generator assembly (1) is connected to the excitation assembly (3) via a bearing assembly (2).

3. The generator exciter cooling device according to claim 1, characterized in that: A control valve (5) is provided on the cooling pipeline (4).

4. The generator exciter cooling device according to claim 3, characterized in that: The control valve (5) adopts a manual butterfly valve.

5. The generator exciter cooling device according to claim 1, characterized in that: The cooling pipe (4) is made of metal.

6. The generator exciter cooling device according to claim 5, characterized in that: The cooling pipe (4) adopts a flexible pipe.

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