Direct cooling system installed on air-air cooling generator

Abstract

The utility model relates to a direct cooling system installed on an air-air cooling generator, which comprises an air filtering unit, a dehumidification unit, an air outlet unit, an air outlet channel and an air inlet channel, the air outlet unit is connected with the dehumidification unit through one end of the air outlet channel, and the other end of the air outlet channel is used for being connected with an air outlet of an air-air cooler. The air filtering unit is connected with the dehumidification unit through one end of an air inlet channel, the other end of the air inlet channel is used for being connected with an air inlet of the air-air cooler, and the air inlet of the air-air cooler and an air outlet of the air-air cooler are formed in the diagonal positions of the dehumidification unit. Under the condition that the original air-air cooling mode of the generator is not changed, after a set of direct cooling system is added, heat generated in the generator can be directly eliminated, the running temperature rise of the generator is rapidly reduced, unit shutdown caused by high temperature of the generator is effectively avoided, and the generating capacity of a wind turbine generator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-fed asynchronous generators, in particular to a direct cooling system installed in an air-to-air cooling generator. Background Art

[0002] The doubly-fed asynchronous generator is one of the key components of the doubly-fed wind turbine generator set. Most of them use air-to-air cooling to dissipate heat. Stable operation has a direct impact on the power generation and economic benefits of the unit.

[0003] At present, in the 1.5MW double-fed asynchronous generators that have been in operation for about 10 years, problems such as winding aging, ventilation duct blockage and fan breakage are common due to the harsh environment. Under long-term rated load, the temperature rises abnormally and shuts down, which ultimately reduces the power generation and performance of the unit.

[0004] Regarding the high temperature problem of the generator, due to the limitations of space and equipment technology, very little work can be done inside the wind turbine, and solving the high temperature problem is not obvious. The cost of lowering the generator tower is high.

[0005] In summary, there is an urgent need for a direct cooling system installed in an air-to-air cooled generator. Utility Model Content

[0006] The utility model aims to provide a direct cooling system installed in an air-to-air cooled generator, so as to solve the problem in the above background technology that the temperature rise of the winding of the air-to-air cooled double-fed asynchronous generator affects the stable operation of the equipment.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model discloses a direct cooling system installed in an air-to-air cooling generator, comprising an air filter unit, a dehumidification unit, an air outlet unit, an air outlet channel and an air inlet channel, the air outlet unit is connected to the dehumidification unit through one end of the air outlet channel, the other end of the air outlet channel is used to be connected to the air outlet of an air-to-air cooler, the air filter unit is connected to the dehumidification unit through one end of the air inlet channel, the other end of the air inlet channel is used to be connected to the air inlet of the air-to-air cooler, the air inlet of the air-to-air cooler and the air outlet of the air-to-air cooler are arranged at diagonal positions of the dehumidification unit.

[0009] The direct cooling system installed in the air-to-air cooling generator, preferably, the air outlet channel includes a first air duct and a second air duct, the two ends of the first air duct are respectively connected to the air outlet unit and the dehumidification unit, the two ends of the second air duct are respectively connected to the dehumidification unit and the air outlet of the air-to-air cooler, the air inlet channel includes a third air duct and a fourth air duct, the two ends of the third air duct are respectively connected to the dehumidification unit and the air filter unit, and the two ends of the fourth air duct are respectively connected to the dehumidification unit and the air inlet of the air-to-air cooler.

[0010] The direct cooling system installed in the air-to-air cooling generator, preferably, the air filtration unit includes a main body, an air filter and an air pressure difference sensor, the air filter is installed at the air inlet of the main body, the air pressure difference sensor is installed on the air filter, and the air outlet of the main body is connected to the third air duct.

[0011] The direct cooling system installed on the air-to-air cooling generator, preferably, the dehumidification unit includes a dehumidification box, a first partition, a second partition, a first pipeline, a second pipeline, a first dehumidification air inlet, a first dehumidification air outlet, a second dehumidification air inlet, a second dehumidification air outlet, a dehumidification wheel and a driving motor, the first partition and the second partition are respectively provided with openings, the second dehumidification air inlet is connected to the second partition through the second pipeline, the second dehumidification air outlet is connected to the first partition through the first pipeline, the first dehumidification air inlet is connected to the air filter unit through the third air duct, the second dehumidification air outlet is connected to the air outlet unit through the first air duct, the first dehumidification air outlet is connected to the air inlet of the air-to-air cooler through the fourth air duct, the second dehumidification air inlet is connected to the air outlet of the air-to-air cooler through the second air duct, the dehumidification wheel is arranged on the second partition, the driving motor is arranged on the first partition, and the driving motor can drive the dehumidification wheel to rotate through a rotating rod.

[0012] The direct cooling system installed in the air-to-air cooling generator, preferably, an air quality monitoring sensor is installed inside the dehumidification box.

[0013] The direct cooling system installed in the air-to-air cooling generator, preferably, the dehumidification wheel includes a dehumidification wheel body, a first area, a second area and a sealing strip, the sealing strip divides the dehumidification wheel body into the first area and the second area, the first area is respectively connected to the second dehumidification air inlet and the second dehumidification air outlet, the second area is respectively connected to the first dehumidification air inlet and the first dehumidification air outlet.

[0014] The direct cooling system installed in the air-to-air cooling generator, preferably, the air outlet unit includes an air guide hood, a fan and a blocking vane, the air guide hood is connected to the second dehumidification air outlet through the first air duct, the fan is installed inside the air guide hood, and the blocking vane is installed at the tail of the air guide hood.

[0015] In the direct cooling system installed in the air-to-air cooling generator, preferably, the blocking vanes are multiple rows of blocking vanes, and the blocking vanes are installed obliquely at the rear of the wind guide cover to enable the fan to blow air to open the blocking vanes.

[0016] The utility model adopts the above technical solution, which has the following advantages:

[0017] The utility model can directly discharge the hot air inside the generator and input the dust-removed and dehumidified air into the generator. When combined with the direct cooling system without changing the original air-to-air cooling method, the operating temperature rise of the generator can be quickly reduced, effectively avoiding the shutdown of the generator due to high temperature and increasing the power generation of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall schematic diagram of the direct cooling system;

[0019] Figure 2 The meta-intention for air filtration unit;

[0020] Figure 3 is a schematic diagram of a dehumidification unit;

[0021] Figure 4 is a schematic diagram of an air outlet unit;

[0022] Figure 5 This is a usage state diagram of the utility model.

[0023] Reference numerals in the figures:

[0024] 1. Air filter unit; 101. Air filter; 102. Air pressure difference sensor;

[0025] 2. Dehumidification unit; 201. First dehumidification air inlet; 202. First dehumidification air outlet; 203. Second dehumidification air inlet;

[0026] 204, second dehumidification air outlet; 205, dehumidification wheel; 206, driving motor; 207, first partition;

[0027] 208, second partition; 209, first pipeline; 210, second pipeline; 211, opening;

[0028] 3. Air outlet unit; 301. Air guide cover; 302. Fan; 303. Blocking leaf window;

[0029] 401, third air duct; 402, fourth air duct; 403, second air duct; 404, first air duct;

[0030] 5. Air inlet of air-to-air cooler; 6. Air outlet of air-to-air cooler; 7. Air quality monitoring sensor;

[0031] 8. Air-to-air cooler; 9. Generator. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "one end", "the other end", "upper", "first", "second", "third" and "fourth" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "set" and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The utility model provides a direct cooling system installed in an air-to-air cooling generator. The utility model comprises an air filter unit, a dehumidification unit, an air outlet unit, an air outlet channel and an air inlet channel, wherein the air outlet unit is connected to the dehumidification unit through one end of the air outlet channel, and the other end of the air outlet channel is used to be connected to the air outlet of the air-to-air cooler, the air filter unit is connected to the dehumidification unit through one end of the air inlet channel, and the other end of the air inlet channel is used to be connected to the air inlet of the air-to-air cooler, and the air inlet of the air-to-air cooler and the air outlet of the air-to-air cooler are arranged at diagonal positions of the dehumidification unit.

[0036] Below, a direct cooling system installed in an air-to-air cooling generator provided by an embodiment of the utility model is described in detail with reference to the accompanying drawings.

[0037] Reference Figures 1 to 5 As shown, the utility model provides a direct cooling system that can be used for air-to-air cooling of a generator, comprising an air filter unit 1, a dehumidification unit 2, an air outlet unit 3, an air outlet channel and an air inlet channel, wherein the air outlet unit 3 is connected to the dehumidification unit through one end of the air outlet channel, and the other end of the air outlet channel is used to be connected to an air outlet 6 of an air-to-air cooler, and the air outlet channel discharges the heat generated inside the generator; the air filter unit 1 is connected to the dehumidification unit 2 through one end of the air inlet channel, and the other end of the air inlet channel is used to be connected to an air inlet 5 of an air-to-air cooler, and when the heat inside the generator is discharged, the air inlet channel ensures that no negative pressure is formed inside the generator, and holes are opened at the diagonals of the air-to-air cooler 8 to form an air inlet 5 and an air outlet 6 of the air-to-air cooler, wherein the air-to-air cooler 8 is installed with the generator 9 in a conventional manner.

[0038] Among them, the air outlet channel includes a first air duct 404 and a second air duct 403, the two ends of the first air duct 404 are respectively connected to the air outlet unit 3 and the dehumidification unit 2, the two ends of the second air duct 403 are respectively connected to the dehumidification unit 2 and the air outlet 6 of the air-to-air cooler, and the air inlet channel includes a third air duct 401 and a fourth air duct 402, the two ends of the third air duct 401 are respectively connected to the dehumidification unit 2 and the air filter unit 1, and the two ends of the fourth air duct 402 are respectively connected to the dehumidification unit 2 and the air inlet 5 of the air-to-air cooler.

[0039] Continue to refer to Figure 2 As shown, the air filter unit 1 includes a main body, an air filter 101 and an air pressure difference sensor 102. The air filter unit 1 has at least one air inlet of the main body. The air filter 101 is installed at the air inlet of the main body to filter the moisture in the ash layer in the air. The air pressure difference sensor 102 is installed on the air filter 101, and the air outlet of the main body is connected to the third air duct 401.

[0040] Among them, the air filter 101 is detachably fixed and fixed with a quick-release buckle to facilitate later maintenance and replacement.

[0041] Among them, the air filter 101 adopts an IP65 protection grade air inlet window and a dust-permeable and high wind pressure resistant filter material, which can effectively filter dust particles with a diameter of ≥5μm to ensure efficient ventilation and complete dust prevention. The filter material can be washed with water or cleaned with wind.

[0042] The air pressure difference sensor 102 is used to monitor the resistance of the air filter 101. The air pressure difference sensor 102 is connected to the control system. When the resistance reaches the design requirements, the control system reminds the operation and maintenance personnel to perform maintenance in time.

[0043] Reference Figure 3 As shown, the dehumidification unit 2 is used to further absorb moisture in the air entering the generator. The dehumidification unit 2 includes a dehumidification box, a first partition 207, a second partition 208, a first pipeline 209, a second pipeline 210, a first dehumidification air inlet 201, a first dehumidification air outlet 202, a second dehumidification air inlet 203, a second dehumidification air outlet 204, a dehumidification wheel 205 and a driving motor 206. The first partition 207 and the second partition 208 are respectively provided with openings 211. The second dehumidification air inlet 203 is connected to the second partition 208 through the second pipeline 210, and the second dehumidification air outlet 204 is connected to the first partition 207 through the first pipeline 209.

[0044] The first dehumidification air inlet 201 is connected to 1 through the third air duct 401, the second dehumidification air outlet 204 is connected to the air outlet unit 3 through the first air duct 404, the first dehumidification air outlet 202 is connected to the air inlet 5 of the air-to-air cooler through the fourth air duct 403, the second dehumidification air inlet 203 is connected to the air outlet 6 of the air-to-air cooler through the second air duct 403, the dehumidification wheel 205 is arranged on the second partition 208, and the driving motor 206 is arranged on the first partition 107. The driving motor 206 can drive the dehumidification wheel 205 to rotate through the rotating rod, and the driving motor 206 can drive the dehumidification wheel 205 to rotate through the rotating rod.

[0045] The dehumidification wheel 205 is a honeycomb structure, which is formed by combining a molecular sieve with a high-efficiency hygroscopic silica gel to absorb moisture in the intake air.

[0046] The dehumidification wheel 205 includes a dehumidification wheel body, a first area, a second area and a sealing strip, wherein the sealing strip divides the dehumidification wheel body into the first area and the second area, wherein the first area occupies 1 / 4 of the area of ​​the dehumidification wheel 205, and the second area occupies 3 / 4 of the area of ​​the dehumidification wheel 205. The first area is respectively connected to the second dehumidification air inlet 203 and the second dehumidification air outlet 204, and the hot air inside the generator is used to take away the moisture in the dehumidification wheel 205, complete the desorption regeneration, and quickly restore the moisture absorption function of the dehumidification wheel. The second area is respectively connected to the first dehumidification air inlet 201 and the first dehumidification air outlet 202, and is used to further absorb the moisture in the air entering the generator.

[0047] Among them, an air quality monitoring sensor 7 is installed inside the dehumidification unit 2. The air quality monitoring sensor 7 is used to monitor the dust concentration and real-time temperature and humidity of the air entering the generator. The air quality monitoring sensor 7 is connected to the control system. When the dust concentration and humidity reach the design requirements, the system alarm stops running, reminding the operation and maintenance personnel to perform maintenance in time.

[0048] refer to Figure 4 As shown, the air outlet unit 3 is used to discharge the hot air inside the generator, and includes an air guide cover 301, a fan 302, and a blocking vane 303; the air guide cover 301 is connected to the air outlet 204 through an air duct 404; the fan 302 is installed inside the air guide cover 301; and the blocking vane 303 is installed at the tail of the air guide cover 301.

[0049] Among them, the blocking window blades 303 include multiple rows of blocking window blades, which form a one-way ventilation structure. The multiple rows of blocking window blades are installed in an inclined manner at the tail of the air guide cover 301, and rely on the fan 302 to blow air to achieve ventilation by opening the multiple rows of blocking window blades.

[0050] Working process:

[0051] The air entering after being filtered by the air filter unit 1 further absorbs moisture in the air through the second area of ​​the dehumidification wheel 205, and then enters the generator through the air inlet 5 of the air-to-air cooler through the fourth air duct 402. The hot air inside the generator enters the first area of ​​the dehumidification wheel 205 through the air outlet 6 of the air-to-air cooler and the second air duct 403. The hot air inside the generator is used to take away the moisture in the dehumidification wheel 205, completing the desorption regeneration and quickly restoring the moisture absorption function of the dehumidification wheel.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A direct cooling system installed in an air-to-air cooled generator, characterized in that: The air filter comprises an air filter unit, a dehumidification unit, an air outlet unit, an air outlet channel and an air inlet channel, wherein the air outlet unit is connected to the dehumidification unit through one end of the air outlet channel, and the other end of the air outlet channel is used to be connected to the air outlet of an air-to-air cooler, the air filter unit is connected to the dehumidification unit through one end of the air inlet channel, and the other end of the air inlet channel is used to be connected to the air inlet of the air-to-air cooler, and the air inlet of the air-to-air cooler and the air outlet of the air-to-air cooler are arranged at diagonal positions of the air-to-air cooler; The air outlet channel includes a first air channel and a second air channel, the two ends of the first air channel are respectively connected to the air outlet unit and the dehumidification unit, the two ends of the second air channel are respectively connected to the dehumidification unit and the air outlet of the air-to-air cooler, the air inlet channel includes a third air channel and a fourth air channel, the two ends of the third air channel are respectively connected to the dehumidification unit and the air filter unit, and the two ends of the fourth air channel are respectively connected to the dehumidification unit and the air inlet of the air-to-air cooler; The dehumidification unit includes a dehumidification box, a first partition, a second partition, a first pipeline, a second pipeline, a first dehumidification air inlet, a first dehumidification air outlet, a second dehumidification air inlet, a second dehumidification air outlet, a dehumidification wheel and a driving motor, the first partition and the second partition are respectively provided with openings, the second dehumidification air inlet is connected to the second partition through the second pipeline, the second dehumidification air outlet is connected to the first partition through the first pipeline, the first dehumidification air inlet is connected to the air filter unit through the third air duct, the second dehumidification air outlet is connected to the air outlet unit through the first air duct, the first dehumidification air outlet is connected to the air inlet of the air-to-air cooler through the fourth air duct, the second dehumidification air inlet is connected to the air outlet of the air-to-air cooler through the second air duct, the dehumidification wheel is arranged on the second partition, the driving motor is arranged on the first partition, and the driving motor can drive the dehumidification wheel to rotate through a rotating rod; The dehumidification wheel includes a dehumidification wheel body, a first area, a second area and a sealing strip, wherein the sealing strip divides the dehumidification wheel body into the first area and the second area, the first area is respectively connected to the second dehumidification air inlet and the second dehumidification air outlet, and the second area is respectively connected to the first dehumidification air inlet and the first dehumidification air outlet.

2. The direct cooling system installed in an air-to-air cooled generator according to claim 1, characterized in that: The air filter unit includes a body, an air filter and an air pressure difference sensor. The air filter is installed at the air inlet of the body, the air pressure difference sensor is installed on the air filter, and the air outlet of the body is connected to the third air duct.

3. The direct cooling system installed in an air-to-air cooled generator according to claim 2, characterized in that: An air quality monitoring sensor is also installed inside the dehumidification box.

4. The direct cooling system installed in an air-to-air cooled generator according to claim 3, characterized in that: The air outlet unit includes an air guide hood, a fan and a blocking vane. The air guide hood is connected to the second dehumidification air outlet through the first air duct. The fan is installed inside the air guide hood, and the blocking vane is installed at the rear of the air guide hood.

5. The direct cooling system installed in an air-to-air cooled generator according to claim 4, characterized in that: The blocking leaf windows are multiple rows of blocking leaf windows, and the blocking leaf windows are installed obliquely at the rear of the wind guide cover so that the fan can open the blocking leaf windows by blowing air.

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