Environment-friendly brushless excitation system

Abstract

The utility model discloses an environment-friendly brushless excitation system, which comprises a body, an air cooler, a stator, a rotor, a front fan cover, a rear fan cover and a fan, a first cavity, a second cavity and a third cavity are arranged in the body, and a loop air duct is arranged among the first cavity, the second cavity and the third cavity. A temperature monitoring unit is installed in the loop air duct and used for monitoring the real-time temperature before and after cooling in the loop air duct, the air cooler is installed at the bottom end of the interior of the body, the stator, the rotor and the fan are all installed in the body, and the front fan cover and the rear fan cover are arranged on the two sides of the body respectively. Through the implementation of the air cooler control system, after the temperature monitoring unit obtains the real-time temperature before and after cooling in the loop air duct, the air cooler can be accurately controlled and adjusted, and the air cooler control system is simple and reasonable in structural design, environmentally friendly and high in practicability and has certain use value and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless exciters, in particular to an environmentally friendly brushless excitation system. Background Art

[0002] Brushless exciters are used for high-speed synchronous motors, especially large thermal power generating units. The brushless excitation system eliminates the traditional slip ring and carbon brush structure, and integrates the rectifier (usually a silicon rectifier diode) on the generator shaft, which rotates coaxially with the generator, avoiding carbon brush wear and maintenance problems, and improving the reliability and service life of the system. The air cooler is a key component for heat dissipation. It cools the heating elements in the generator and excitation system, especially the rotating rectifier and the generator rotor winding, by forced air convection. The air flow takes away the heat, ensuring that the temperature rise of the generator under high load or long-term operation is controlled within a safe range to prevent overheating damage.

[0003] As the excitation power source, the cooling of the brushless exciter generally takes part of the cold air from the host machine. This makes the wind path long and easily interferes with the host machine. In addition, the air cooler cannot perform targeted cooling according to the actual heat generated by the brushless exciter, which is not very environmentally friendly.

[0004] In summary, an environmentally friendly brushless excitation system is needed to solve the deficiencies in the prior art. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an environmentally friendly brushless excitation system, aiming to solve the above problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an environmentally friendly brushless excitation system, including a body, an air cooler, a stator, a rotor, a front air hood, a rear air hood and a fan, wherein the body is provided with a first cavity, a second cavity and a third cavity, a loop air duct is provided between the first cavity, the second cavity and the third cavity, a temperature monitoring unit is installed in the loop air duct, and the temperature monitoring unit is used to monitor the real-time temperature before and after cooling in the loop air duct, the air cooler is installed at the bottom of the body, the stator, the rotor and the fan are all installed in the body, and the front air hood and the rear air hood are respectively arranged on both sides of the body. Through the loop air duct formed in the first cavity, the second cavity and the third cavity, the temperature monitoring unit can obtain the real-time temperature before and after cooling in the loop air duct, and the air cooler can be controlled and adjusted more accurately, the structural design is simple and reasonable, more environmentally friendly, and relatively practical.

[0007] Furthermore, the first cavity is used to install a stator, a rotor and a fan, the second cavity is used to install a front air hood and a rear air hood, and the third cavity is used to install an air cooler.

[0008] Furthermore, the stator and the rotor are located close to one side of the fan output end.

[0009] Furthermore, the temperature monitoring unit includes a front-end monitoring module and a back-end monitoring module, the front-end monitoring module is installed in the first cavity, and the back-end monitoring module is installed in the third cavity.

[0010] Furthermore, the front-end monitoring module is located on a side of the stator and the rotor away from the fan.

[0011] Furthermore, the rear-end monitoring module is located in the third cavity and close to one side of the output end of the air cooler.

[0012] Furthermore, a solenoid valve for accurately controlling the amount of water is installed on the water inlet pipe of the air cooler.

[0013] Furthermore, the fan, front-end monitoring module, rear-end monitoring module and solenoid valve are all electrically connected to a control terminal, and the control terminal is used to adjust the solenoid valve in real time to change the water volume according to the temperature before and after cooling monitored by the front-end monitoring module and the rear-end monitoring module.

[0014] Beneficial effects of the utility model:

[0015] 1. In the utility model, the loop air duct formed in the first cavity, the second cavity and the third cavity is set, and after the temperature monitoring unit obtains the real-time temperature in the loop air duct before and after cooling, the air cooler can be controlled and adjusted more accurately, which has a targeted cooling effect and is more scientific and environmentally friendly;

[0016] 2. In the present invention, the first cavity, the second cavity and the third cavity are provided to form relatively independent spaces capable of circulating air. The overall structural design is relatively simple, and the spatial layout is reasonable and practical.

[0017] 3. In the utility model, the front-end monitoring module is installed on the side of the stator and rotor away from the fan, and the rear-end monitoring module is located in the third cavity and close to the side of the air cooler output end, so that the front-end monitoring module can monitor the specific temperature value in the fastest time, and give the control terminal a certain time to calculate and adjust the solenoid valve. At the same time, the rear-end monitoring module detects the temperature of the gas after discharge for the first time, and uses the temperature after discharge as the basis for further adjusting the water volume. It has certain use value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below 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 labor.

[0019] Figure 1 It is a front view cross-sectional view of the structure of the utility model.

[0020] Figure 2 This is a structural principle block diagram of the utility model.

[0021] In the figure: 1-main body, 11-first cavity, 12-second cavity, 13-third cavity, 14-loop air duct; 2-air cooler, 3-stator, 4-rotor, 5-front air hood, 6-rear air hood, 7-fan, 8-temperature monitoring unit. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0024] like Figure 1 , 2As shown, an environmentally friendly brushless excitation system includes a body 1, an air cooler 2, a stator 3, a rotor 4, a front air hood 5, a rear air hood 6 and a fan 7. A first cavity 11, a second cavity 12 and a third cavity 13 are provided inside the body 1. A loop air duct 14 is provided between the first cavity 11, the second cavity 12 and the third cavity 13. A temperature monitoring unit 8 is installed in the loop air duct 14. The temperature monitoring unit 8 is used to monitor the real-time temperature before and after cooling in the loop air duct 14. The air cooler 2 is installed at the bottom end of the body 1, the stator 3, the rotor 4 and the fan 7 are all installed in the body 1, and the front air hood 5 and the rear air hood 6 are respectively arranged on both sides of the body 1; the loop air duct 14 formed in the first cavity 11, the second cavity 12 and the third cavity 13 can control and adjust the air cooler 2 more accurately after obtaining the real-time temperature before and after cooling in the loop air duct 14 through the temperature monitoring unit 8, which is more scientific and environmentally friendly while achieving targeted cooling effect.

[0025] As an implementation mode, the first cavity 11 is used to install the stator 3 , the rotor 4 and the fan 7 , the second cavity 12 is used to install the front air hood 5 and the rear air hood 6 , and the third cavity 13 is used to install the air cooler 2 .

[0026] As an implementation mode, the stator 3 and the rotor 4 are close to one side of the output end of the fan 7 .

[0027] As an implementation manner, the temperature monitoring unit 8 includes a front-end monitoring module and a back-end monitoring module. The front-end monitoring module is installed in the first cavity 11 , and the back-end monitoring module is installed in the third cavity 13 .

[0028] As an implementation mode, the front-end monitoring module is located on the left side of the stator 3 and the rotor 4, and the rear-end monitoring module is located in the third cavity 13 and close to the right side of the air cooler 2; the front-end monitoring module is installed on the left side of the stator 3 and the rotor 4 away from the fan, and the rear-end monitoring module is located in the third cavity 13 and close to the right side of the air cooler, so that the front-end monitoring module can monitor the specific temperature value in the fastest time, and give the control terminal a certain time to calculate and adjust the solenoid valve. At the same time, the rear-end monitoring module detects the gas temperature after discharge for the first time, and uses the temperature after discharge as the basis for further adjusting the water volume.

[0029] As an implementation mode, a solenoid valve for accurately controlling the water volume is installed on the water inlet pipe of the air cooler 2 to adjust the water volume according to the temperature of the loop air duct 14 before cooling. The principle is relatively simple and the control is convenient.

[0030] As an implementation mode, the fan 7, the front-end monitoring module, the rear-end monitoring module and the solenoid valve are all electrically connected to a control terminal, and the control terminal is used to adjust the solenoid valve in real time to change the water volume according to the temperature before and after cooling monitored by the front-end monitoring module and the rear-end monitoring module.

[0031] Working principle of the utility model: when in use, the stator 3 and the rotor 4 in the first cavity 11 are air-cooled by the fan 7 to remove the generated heat. The heat removed by the gas circulation is firstly monitored by the front-end monitoring module on the left side of the stator 3 and the rotor 4 for temperature monitoring, and synchronously fed back to the control terminal, according to the preset processing logic (when the temperature of the gas is in the specified temperature range, the solenoid valve maintains a normal water inlet flow rate, and as the temperature of the gas changes, the water volume is adjusted in proportion through the solenoid valve, the water volume is increased when the temperature rises, and the water volume is reduced accordingly when the temperature decreases), and specifically, the gas cooled by the air cooler 2 is monitored by the back-end monitoring module on one side as soon as it is output, and the actual temperature after cooling is fed back to the control terminal, if the temperature after cooling is lower than the threshold value, the water volume of the air cooler 2 is reduced, otherwise, the water volume of the air cooler 2 is increased, thereby realizing an overall efficient cooling air path with relatively strong pertinence.

[0032] It should be noted that the preferred implementation methods of the utility model are given in the specification and drawings of the utility model. However, the utility model can be implemented in many different forms and is not limited to the implementation methods described in the specification. These implementation methods are not used as additional restrictions on the content of the utility model. The purpose of providing these implementation methods is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various implementation methods not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. An environmentally friendly brushless excitation system, characterized in that: The invention comprises a body (1), an air cooler (2), a stator (3), a rotor (4), a front air cover (5), a rear air cover (6) and a fan (7); a first cavity (11), a second cavity (12) and a third cavity (13) are arranged inside the body (1); a loop air duct (14) is arranged between the first cavity (11), the second cavity (12) and the third cavity (13); a temperature monitoring unit (8) is installed in the loop air duct (14); the temperature monitoring unit (8) is used to monitor the real-time temperature in the loop air duct (14) before and after cooling; the air cooler (2) is installed at the bottom end of the body (1); the stator (3), the rotor (4) and the fan (7) are all installed in the body (1); the front air cover (5) and the rear air cover (6) are respectively arranged on both sides of the body (1).

2. According to claim 1, an environmentally friendly brushless excitation system is characterized in that: The first cavity (11) is used for installing a stator (3), a rotor (4) and a fan (7), the second cavity (12) is used for installing a front air hood (5) and a rear air hood (6), and the third cavity (13) is used for installing an air cooler (2).

3. The environmentally friendly brushless excitation system according to claim 2, characterized in that: The stator (3) and the rotor (4) are located close to one side of the output end of the fan (7).

4. The environmentally friendly brushless excitation system according to claim 3, characterized in that: The temperature monitoring unit (8) comprises a front-end monitoring module and a back-end monitoring module, wherein the front-end monitoring module is installed in the first cavity (11) and the back-end monitoring module is installed in the third cavity (13).

5. The environmentally friendly brushless excitation system according to claim 4, characterized in that: The front-end monitoring module is located on a side of the stator (3) and the rotor (4) away from the fan (7).

6. The environmentally friendly brushless excitation system according to claim 5, characterized in that: The rear-end monitoring module is located in the third cavity (13) and close to a side of the output end of the air cooler (2).

7. An environmentally friendly brushless excitation system according to claim 6, characterized in that: A solenoid valve for accurately controlling the amount of water is installed on the water inlet pipe of the air cooler (2).

8. The environmentally friendly brushless excitation system according to claim 7, characterized in that: The fan (7), the front-end monitoring module, the rear-end monitoring module and the solenoid valve are all electrically connected to a control terminal, and the control terminal is used to adjust the solenoid valve in real time to change the water volume according to the temperature before and after cooling monitored by the front-end monitoring module and the rear-end monitoring module.

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