Heat dissipation structure of air-air cooling doubly-fed wind driven generator

Abstract

The utility model discloses an air-air cooling doubly-fed wind driven generator heat dissipation structure, which comprises a cooling fan, a first pipeline, a second pipeline and a T-shaped tee joint, the side surface of the rear area of the shell of the cooling fan is provided with an opening, the shape and size of the opening are matched with those of the pipe orifice of the first pipeline, and one end of the first pipeline is butted with the opening. The other transverse interface of the T-shaped tee joint is connected with one end of the second pipeline, an opening is formed in the side face of a stator outlet box installed on a shell of the generator, the shape and the size of the opening are matched with those of a pipe opening of the second pipeline, and the other end of the second pipeline is in butt joint with the opening in the side face of the stator outlet box. The T-shaped tee joint is located above a driving end bearing outer cover of the generator, and a vertical connector of the T-shaped tee joint faces and is close to the driving end bearing outer cover as an air outlet. According to the utility model, the heat radiation effect of the driving end bearing and the stator outlet box can be effectively enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of double-fed wind driven generator heat dissipation, and especially to an air-air cooling double-fed wind driven generator heat dissipation structure. BACKGROUND

[0002] With the development of the wind power industry, the unit power is getting larger and larger, and the heat dissipation problems of the generator bearing and the stator outlet box are getting more and more prominent. Bearing heat dissipation generally includes grease heat dissipation and bearing outer cover heat dissipation. Small-power generator bearings generally use double-ball structures, that is, one bearing at the driving end and one bearing at the non-driving end, at which time the non-driving end is far away and has poor heat dissipation conditions, and is prone to high temperature. For high-power generator bearing structures, there are generally three bearings, two bearings at the driving end, one ball and one column, and one column bearing at the non-driving end. Due to the difference in structure, the oil path at the driving end is relatively long, and the heat dissipation is much worse than that at the non-driving end, which makes the driving end bearing prone to high temperature. The stator outlet box generates heat during the operation of the generator due to its sealed structure, and the heat dissipation is poor. In addition, the heat inside the motor is also conducted to the inside of the stator outlet box, causing the air temperature inside the stator outlet box to be too high, which in turn causes the cable temperature to be very high. Combined with the special working conditions on site, the high temperature aging of the cable is aggravated, causing the cable to burn out, which affects the normal operation of the motor.

[0003] The existing high temperature of the generator bearing is generally solved by manual greasing, replacing grease, and modifying a new bearing cover, but the practicability is poor, the effect is not obvious, and the problem can only be temporarily solved in a short period of time, and the problem cannot be completely solved. The stator outlet box mainly dissipates heat through the external air, and the efficiency is low, the effect is poor, and only high-grade cables or larger stator outlet boxes can be used, which increases the overall cost and layout difficulty. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the shortcomings and deficiencies of the prior art, and provides an air-air cooling double-fed wind driven generator heat dissipation structure, which can effectively enhance the heat dissipation effect of the driving end bearing and the stator outlet box, reduce the risk of bearing and cable high temperature failure, and avoid the labor material cost and power generation loss caused by bearing failure and cable high temperature damage.

[0005] To achieve the above object, the utility model provides a technical scheme for air-air cooling double-fed wind driven generator heat dissipation structure, cooling fan is installed on the top of the generator's shell, provides power for the generator's outer circulation, and exchanges heat with the generator's inner circulation, still includes first pipeline, second pipeline and T type tee, the rear area side of the shell of cooling fan is opened, the opening shape size matches with the pipe orifice of first pipeline, one end of first pipeline is docked in above-mentioned opening, and the other end is connected with one of the horizontal interfaces of T type tee, the other interface of T type tee is connected with one end of second pipeline, the side opening of the stator terminal box installed on the shell of generator is opened, the opening shape size matches with the pipe orifice of second pipeline, the other end of second pipeline is docked in the side opening of the stator terminal box, T type tee is located above the drive end bearing cover of generator, and the vertical interface is as air outlet and approaches the drive end bearing cover.

[0006] Further, it further includes filter screen, the shape size of filter screen matches with the side opening of stator terminal box, and is installed at the side opening of stator terminal box.

[0007] Further, the first pipeline is installed on the shell of cooling fan by first clamping piece.

[0008] Further, the first clamping piece is fixed on the shell of cooling fan by bolt.

[0009] Further, sealing glue is used between the first pipeline and opening.

[0010] Further, the second pipeline is installed on the shell of generator by second clamping piece.

[0011] Further, the second clamping piece is fixed on the shell of generator by bolt.

[0012] Further, sealing glue is used between the second pipeline and opening.

[0013] Compared with prior art, the utility model has the following advantages and beneficial effects:

[0014] 1, simple and efficient solution air-air cooling double-fed wind driven generator drive end bearing and stator terminal box cable temperature problem of being too high.

[0015] 2, without affecting the internal structure of generator, simple and convenient and easy to reform.

[0016] 3, reduce the cost of replacing generator grease and cable, internal reconstruction cost and power generation loss. DRAWINGS

[0017] Figure 1It is a schematic view of a heat dissipation structure of an air-air cooling doubly-fed wind power generator. DETAILED DESCRIPTION

[0018] The utility model will be described in further detail below in combination with the embodiments and drawings, but the embodiments of the utility model are not limited thereto.

[0019] As Figure 1 shown, the embodiment discloses a heat dissipation structure of an air-air cooling doubly-fed wind power generator, which comprises a cooling fan 1, a first pipeline 3, a second pipeline 4 and a T-shaped tee joint 5, the cooling fan 1 is installed at the top of the shell of a generator 2, provides power for the external circulation of the generator and exchanges heat with the internal circulation of the generator, so that the normal operation of each component of the generator is ensured, the rear area side of the shell of the cooling fan 1 is opened, the opening shape and size are matched with the pipe opening of the first pipeline 3, one end of the first pipeline 3 is connected to the opening, and the other end is connected with one of the horizontal interfaces of the T-shaped tee joint 5, the other horizontal interface of the T-shaped tee joint 5 is connected with one end of the second pipeline 4, the side opening of the stator outlet box 7 installed on the shell of the generator 2 is opened, the opening shape and size are matched with the pipe opening of the second pipeline 4, the other end of the second pipeline 4 is connected to the side opening of the stator outlet box 7, and the T-shaped tee joint 5 is located above the driving end bearing cover 6 of the generator, and the vertical interface of the T-shaped tee joint 5 serves as an air outlet and is close to the driving end bearing cover 6.

[0020] Preferably, a filter screen (not shown in the figure) is further included, the shape and size of the filter screen are matched with the side opening of the stator outlet box 7, and the filter screen is installed at the side opening of the stator outlet box 7 and used for filtering dust.

[0021] Preferably, the first pipeline 3 is installed on the shell of the cooling fan 1 through a first clamping piece 8, the first clamping piece 8 is fixed on the shell of the cooling fan 1 by means of a bolt, and sealing glue is used to block the gap between the first pipeline 3 and the opening.

[0022] Preferably, the second pipeline 4 is installed on the shell of the generator 2 through a second clamping piece 9, the second clamping piece 9 is fixed on the shell of the generator 2 by means of a bolt, and sealing glue is used to block the gap between the second pipeline 4 and the opening.

[0023] Preferably, the first pipeline 3, the second pipeline 4, the T-shaped tee joint 5 and the stator outlet box 7 are made of Q235 material.

[0024] The driving end bearing outer cover 6 is made of cast iron material, and forms a bearing unit with bearings and the like. The first pipeline 3 guides cold air to the driving end bearing outer cover 6 to forcibly cool the driving end bearing outer cover 6, thereby achieving the effect of cooling. Further, the bearing supports the rotating movement of the rotor, and is generally cooled by lubricating grease and the driving end bearing outer cover 6. The heat generated by the bearing is radiated to the driving end bearing outer cover 6, and then cooled by the wind of the first pipeline 3, thereby achieving the effect of strengthening the cooling of the bearing.

[0025] When the first pipeline 3 and the second pipeline 4 are installed, the connection bolt torque is fastened to prevent the bolts from loosening due to the vibration of the generator during long-time operation, and sealing glue is added to block the gap to prevent dust from entering the generator assembly. The pipeline is assembled outside the generator to save time and labor.

[0026] When the cooling fan 1 is started, the cold air directly cools the driving end bearing outer cover 6 and the stator outlet box 7 through the first pipeline 3, the second pipeline 4 and the T-shaped tee joint 5, which can effectively handle the imbalance of the generator cooling system, directly reduce the temperature of the driving end bearing and the stator outlet box of the generator, improve the availability of the wind turbine generator, and increase the power generation capacity of the unit.

[0027] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A heat dissipation structure for an air-cooled doubly-fed wind turbine generator, comprising a cooling fan (1), wherein the cooling fan (1) is installed on the top of the casing of a generator (2), providing power to the external circulation of the generator and exchanging heat with the internal circulation of the generator, characterized in that, It also includes a first pipe (3), a second pipe (4) and a T-shaped tee (5). The cooling fan (1) has a side opening in the rear area of ​​its casing. The shape and size of the opening match the opening of the first pipe (3). One end of the first pipe (3) is connected to the opening mentioned above, and its other end is connected to one of the horizontal interfaces of the T-shaped tee (5). The other horizontal interface of the T-shaped tee (5) is connected to one end of the second pipe (4). The stator outlet box (7) installed on the casing of the generator (2) has a side opening. The shape and size of the opening match the opening of the second pipe (4). The other end of the second pipe (4) is connected to the side opening of the stator outlet box (7). The T-shaped tee (5) is located above the outer cover (6) of the drive end bearing of the generator. Its vertical interface serves as an air outlet facing and close to the outer cover (6) of the drive end bearing.

2. The heat dissipation structure for an air-cooled doubly-fed wind turbine generator according to claim 1, characterized in that, It also includes a filter screen whose shape and size match the side opening of the stator outlet box (7) and is installed at the side opening of the stator outlet box (7).

3. The heat dissipation structure for an air-cooled doubly-fed wind turbine generator according to claim 1, characterized in that, The first pipe (3) is mounted on the housing of the cooling fan (1) via the first clamp (8).

4. The heat dissipation structure for an air-cooled doubly-fed wind turbine generator according to claim 3, characterized in that, The first clip (8) is fixed to the outer casing of the cooling fan (1) with bolts.

5. The heat dissipation structure for an air-cooled doubly-fed wind turbine generator according to claim 1, characterized in that, The first pipe (3) is sealed with sealant between itself and the opening.

6. The heat dissipation structure for an air-cooled doubly-fed wind turbine generator according to claim 1, characterized in that, The second pipe (4) is mounted on the housing of the generator (2) via the second clamp (9).

7. The heat dissipation structure for an air-cooled doubly-fed wind turbine generator according to claim 6, characterized in that, The second clip (9) is fixed to the housing of the generator (2) with bolts.

8. The heat dissipation structure for an air-cooled doubly-fed wind turbine generator according to claim 1, characterized in that, The second pipe (4) is sealed with sealant between itself and the opening.

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