A generator stator drying device and a generator

Abstract

This utility model relates to the technical field of generators, and more particularly to a generator stator drying device and a generator. The device is installed on the generator casing, with a window located on the side wall of the casing near the stator. The generator stator drying device also includes a ventilation duct, a heating source, and a fan. One end of the ventilation duct is connected to the window, and the other end is connected to the outlet end of the fan. The inlet end of the fan is connected to one end of the heating source, and the other end of the heating source is open to the outside air. By providing a window on the side wall of the generator casing near the stator, the ventilation duct is connected to the inside of the generator casing. Drying air heated by the heating source can be driven by the fan and transported through the ventilation duct to the inside of the generator casing, entering the generator stator windings to dry the generator stator. This solves the technical problem in the prior art where, when the generator is shut down for maintenance, moisture can cause a decrease in the insulation of the generator stator due to the relatively humid air.

Description

Technical Field

[0001] This utility model relates to the technical field of generators, and in particular to a generator stator drying device and a generator. Background Technology

[0002] The generator stator is one of the key components of a generator. For high-voltage, high-capacity synchronous motors, a rotating magnetic pole structure is used. Since the capacity and voltage of the excitation section are often much smaller than those of the armature, the armature is mounted on the stator, and the main magnetic poles are mounted on the rotor. The main function of the generator stator is to generate voltage by cutting the magnetic field generated by the rotating magnetic field formed in the rotor.

[0003] When an existing generator is shut down for maintenance, the humidity in the air can cause a decrease in the insulation of the generator stator, preventing the generator from reaching the insulation level required for normal startup. Utility Model Content

[0004] The purpose of this utility model is to provide a generator stator drying device and a generator to solve the technical problem in the prior art that when a generator is shut down for maintenance, the moisture in the air may cause a decrease in the insulation of the generator stator, thus preventing the generator from reaching the insulation level required for normal startup.

[0005] In a first aspect, the present invention provides a generator stator drying device, which is disposed on the generator housing, wherein the generator housing has a window on the side wall near the stator, and the generator stator drying device further includes a ventilation duct, a heating source and a fan;

[0006] One end of the ventilation duct is connected to the window, the other end of the ventilation duct is connected to the outlet end of the fan, the inlet end of the fan is connected to one end of the heating source, and the other end of the heating source is connected to the outside air.

[0007] Furthermore, the generator stator drying device also includes a temperature detection element, which is disposed inside the window and fixed to the generator housing. The temperature detection element is electrically connected to the heating source and the fan respectively.

[0008] Furthermore, the generator stator drying device also includes a humidity detection element, which is disposed inside the window and fixed to the generator housing. The humidity detection element is electrically connected to the heating source and the fan respectively.

[0009] Secondly, this utility model also provides a generator, including the aforementioned generator stator drying device.

[0010] Compared with the prior art, the generator stator drying device provided by this utility model is installed in the generator casing, with a window set on the side wall of the generator casing near the stator. The generator stator drying device also includes a ventilation duct, a heating source, and a fan. One end of the ventilation duct is connected to the window, and the other end of the ventilation duct is connected to the outlet end of the fan. The inlet end of the fan is connected to one end of the heating source, and the other end of the heating source is connected to the outside air. By setting a window on the side wall of the generator casing near the stator, the ventilation duct is connected to the inside of the generator casing, so that the drying air heated by the heating source can be driven by the fan and transported to the inside of the generator casing through the ventilation duct, entering the generator stator winding to dry the generator stator. This solves the technical problem in the prior art that when the generator is shut down for maintenance, the moisture may cause the generator stator insulation to drop, thus preventing the generator from reaching the insulation level required for normal start-up. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of the generator stator drying device provided in an embodiment of the present utility model;

[0013] Figure 2 This is a cross-sectional view of the overall structure of the generator stator drying device provided in an embodiment of this utility model.

[0014] Figure label:

[0015] 100. Ventilation duct; 200. Heating source; 300. Fan; 400. Generator casing; 410. Window. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] Example 1

[0024] like Figure 1 and Figure 2As shown, this utility model embodiment provides a generator stator drying device, which is disposed in the generator housing 400. The generator housing 400 has a window 410 on the side wall near the stator. The generator stator drying device also includes a ventilation duct 100, a heating source 200 and a fan 300. One end of the ventilation duct 100 is connected to the window 410, and the other end of the ventilation duct 100 is connected to the outlet end of the fan 300. The inlet end of the fan 300 is connected to one end of the heating source 200, and the other end of the heating source 200 is in communication with the outside air.

[0025] That is, the generator stator drying device provided in this embodiment of the utility model provides a window 410 on the side wall of the generator housing 400 near the stator, so that the ventilation duct 100 is connected to the inside of the generator housing 400. The drying air heated by the heating source 200 can be driven by the fan 300 and transported to the inside of the generator housing 400 through the ventilation duct 100, and enter the generator stator winding to dry the generator stator. This solves the technical problem in the prior art that when the generator is shut down for maintenance, the moisture may cause the generator stator insulation to drop due to the relatively humid air, thus preventing the generator from reaching the insulation level required for normal start-up.

[0026] Specifically, a rectangular window 410 is typically provided on the side wall of the engine casing near the stator, usually serving as an inspection port to allow communication between the engine interior and the outside. A cover is provided at the window 410 to maintain its normally closed state when not under maintenance. In this embodiment, to connect the ventilation duct 100 to the generator casing 400, the cover needs to be removed, and the ventilation duct 100 is connected to the window 410. The ventilation duct 100 can be constructed using welded metal fittings or as a plastic flexible hose, with one end connected to the window 410 via a pipe joint, bolt, or adhesive connector. The other end of the ventilation duct 100 is connected to the air outlet of the fan 300, and the air inlet of the fan 300 is connected to the heat source 200 via a pipe. In this embodiment, the heat source 200 can be a gas electric heater. The gas electric heater has a central through-pipe, one end of which is connected to the air inlet of the fan 300 via a pipe, and the other end is open to the outside air. This allows the fan 300 to draw outside air into the ventilation duct 100 and deliver it to the generator. Heat exchange tubes are installed around the through-pipe of the gas heater, heating and drying the air inside. This enables the engine stator drying device to deliver dry, hot air into the generator, maintaining the generator stator winding temperature above the dew point, preventing condensation, keeping the winding insulation material dry, maintaining dielectric strength, and preventing corrosion of internal components due to condensation caused by temperature differences.

[0027] Furthermore, the generator stator drying device also includes a temperature detection element, which is located inside the window 410 and fixed to the generator housing 400. The temperature detection element is electrically connected to the heating source 200 and the fan 300 respectively.

[0028] Specifically, the temperature detection component is configured as a temperature sensor, which is bolted to the inside of the generator housing 400, thus placing it within the generator cavity. The temperature detection component is connected to the heating source 200 and the fan 300 via wires and a control element. When the temperature detection component detects that the temperature inside the generator is lower than a preset temperature (typically set to 10-15℃), it sends a signal to the control element. The control element then activates the heating source 200 and the fan 300, thereby delivering hot, dry air into the generator to reduce thermal stress during start-up and shutdown.

[0029] Furthermore, the generator stator drying device also includes a humidity detection element, which is located inside the window 410 and fixed to the generator housing 400. The humidity detection element is electrically connected to the heating source 200 and the fan 300 respectively.

[0030] Specifically, the humidity detection component is configured as a humidity sensor, which is bolted to the inside of the generator housing 400, thus placing it within the generator cavity. The humidity detection component is connected to the heating source 200 and the fan 300 via wires and a control element. When the humidity detection component detects that the temperature inside the generator is lower than the preset humidity, it sends a signal to the control element. The control element then activates the heating source 200 and the fan 300, thereby delivering hot, dry air into the generator to prevent the generator stator insulation from becoming damp and causing insulation degradation when the generator is off.

[0031] Example 2

[0032] This utility model also provides a generator, which includes all the technical features of the generator stator drying device described above, and can naturally achieve all the technical effects of the generator stator drying device described above. It will not be described again in this embodiment.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A generator stator drying apparatus provided in a generator housing (400), characterized by, The generator housing (400) has a window (410) near the side wall of the stator. The generator stator drying device also includes a ventilation duct (100), a heating source (200), and a fan (300). One end of the ventilation duct (100) is connected to the window (410), the other end of the ventilation duct (100) is connected to the outlet end of the fan (300), the inlet end of the fan (300) is connected to one end of the heating source (200), and the other end of the heating source (200) is connected to the outside air.

2. The generator stator drying apparatus of claim 1, wherein, The generator stator drying device also includes a temperature detection element, which is disposed in the window (410) and fixed to the generator housing (400). The temperature detection element is electrically connected to the heating source (200) and the fan (300) respectively.

3. The generator stator drying device according to claim 1, characterized in that, The generator stator drying device also includes a humidity detection element, which is disposed in the window (410) and fixed to the generator housing (400). The humidity detection element is electrically connected to the heating source (200) and the fan (300) respectively.

4. A generator, characterized in that, Includes the generator stator drying apparatus as described in any one of claims 1-3.

Images