阅读说明：本技术 一种发电电动机排热空气轴 (Heat extraction air shaft of generator motor ) 是由 王艳武 陶星明 宫海龙 李桂芬 王书枫 王岩禄 王建刚 刘新天 罗建华 明野 杨 于 2019-11-13 设计创作，主要内容包括：本发明公开一种发电电动机排热空气轴,由顶板、中间筒、扇叶、中间板、轴身、底板组成；顶板设置在中间筒内侧并与中间筒焊接,扇叶设置在中间筒和轴身之间并与中间筒和轴身焊接,中间筒设置在中间板上并与中间板焊接,中间板设置在轴身内侧并与轴身焊接,轴身设置在底板上并与底板焊接,底板设置在集电环支架上,通过螺栓把合固定在集电环支架上,本发明采用安装在集电环上面的排热空气轴将热空气强制排出,安装在集电环上面的排热空气轴会在集电环的带动下旋转,排热风轴的驱动端为集电环,不需外加电源才能运行的抽风机,不会出现电源断电或抽风机故障而引发的事故,极大地提高了发电电动机的运行可靠性。(The invention discloses a heat extraction air shaft of a generator motor, which consists of a top plate, a middle cylinder, fan blades, a middle plate, a shaft body and a bottom plate; the invention adopts the heat extraction air shaft arranged on the collecting ring to forcibly discharge hot air, the heat extraction air shaft arranged on the collecting ring can rotate under the driving of the collecting ring, the driving end of the heat extraction air shaft is the collecting ring, an exhaust fan which can operate without an external power supply can be used, accidents caused by power supply outage or exhaust fan faults can not occur, and the operation reliability of the generating motor is greatly improved.)

1. A heat extraction air shaft of a generator motor is characterized in that: consists of a top plate (1), a middle cylinder (2), fan blades (3), a middle plate (4), a shaft body (5) and a bottom plate (6); the top plate (1) is arranged on the inner side of the middle cylinder (2) and welded with the middle cylinder (2), the fan blades (3) are arranged between the middle cylinder (2) and the shaft body (5) and welded with the middle cylinder (2) and the shaft body (5), the middle cylinder (2) is arranged on the middle plate (4) and welded with the middle plate (4), the middle plate (4) is arranged on the inner side of the shaft body (5) and welded with the shaft body (5), the shaft body (5) is arranged on the bottom plate (6) and welded with the bottom plate (6), the bottom plate (6) is arranged on the collecting ring bracket (8), the collector ring is fixed on a collector ring support (8) through bolts (7), an inner cavity E surrounded by the middle plate (4), the shaft body (5) and the bottom plate (6) is communicated with an inner space D of the top cover (9), and the inner cavity E surrounded by the middle plate (4), the shaft body (5) and the bottom plate (6) is communicated with an upper space F of the top cover (9).

The technical field is as follows:

the invention relates to the field of a generator motor of a pumped storage unit, in particular to a heat extraction air shaft of the generator motor.

Background art:

with the continuous improvement of the technical level of domestic generator motors, more and more generator motors with high capacity and high rotation speed are provided. Generally, a collector ring is designed on the upper part of the top shaft of the generator, and a brush holder device is arranged on the circumference of the collector ring. The brush frame device consists of an electric brush and a conducting ring, and an excitation cable is connected to the conducting ring to supply power to the electric brush, so that the rotor is excited by friction between the electric brush and a collecting ring. In order to protect the collector ring and the brush holder device, a top cover is added on the collector ring and the brush holder device. Friction heat is generated during the friction between the brush and the collector ring. The slip ring and brush holder devices themselves may also generate a significant amount of heat when energized. This heat can accumulate within the generator motor top case. Normally, windows with protective screens are designed around the roof, through which the heat in the roof is naturally discharged to a certain extent. However, as the capacity of the generator motor is continuously improved, the collector ring and the brush holder device generate more and more heat after being electrified. The window on the top cover naturally discharges heat, so that the heat in the top cover is gathered in a large amount, the temperature of the collecting ring and the brush holder device is higher and higher, and after the temperature exceeds the insulation tolerance temperature of the generator motor, the collecting ring and the brush holder device are easy to burn. When the overheating problem is generally encountered, the heat is extracted by adding an exhaust fan on the top cover. The exhaust fan needs an external power supply to operate, and once the power supply is cut off or the exhaust fan is in failure, accidents can happen if the failure is not discovered in time. In view of this, it is urgently needed to develop a high-efficiency heat-extraction air shaft of a generator motor, which has a simple structure, is convenient to install and can operate without an external power supply.

The invention content is as follows:

the invention aims to disclose a heat extraction air shaft of a generator motor, which provides reliable guarantee for heat dissipation of a collector ring and a brush carrier device of the generator motor and ensures safe and stable operation of a unit, and the technical scheme of the invention is as follows: consists of a top plate, a middle cylinder, fan blades, a middle plate, a shaft body and a bottom plate; the roof sets up in a middle section of thick bamboo inboard and welds with a middle section of thick bamboo, the flabellum sets up between a middle section of thick bamboo and axle body and welds with a middle section of thick bamboo and axle body, a middle section of thick bamboo sets up on the intermediate lamella and welds with the intermediate lamella, the intermediate lamella sets up inboard and welds with the axle body at the axle body, the axle body sets up on the bottom plate and welds with the bottom plate, the bottom plate sets up on the collecting ring support, fix closing on the collecting ring support through the bolt, by the intermediate lamella, the axle body, the inner chamber E that the bottom plate encloses and the inner space D UNICOM of overhead guard, by the intermediate lamella, the axle body, the inner chamber E that the bottom plate encloses and the upper portion space F.

The working principle is as follows:

in order to solve the problem that the collector ring and the brush holder device are easy to burn out after the temperature of the collector ring and the brush holder device exceeds the insulation tolerance temperature of the generator motor due to the fact that the temperature of the collector ring and the brush holder device is higher and higher, and further improve the operation reliability of the generator motor, the hot air is forcibly exhausted by the aid of the heat exhaust air shaft arranged on the collector ring support. The collecting ring support is a part of a generator rotor, when the generator set rotates, the collecting ring support rotates, the heat extraction air shaft arranged on the collecting ring support rotates under the driving of the collecting ring support to generate an axial pressure head, then hot air in the top cover is extracted, an external power supply is not needed, and the operation reliability of the generating motor is greatly improved.

The technical effects are as follows:

1. the heat extraction air shaft is arranged on the rotating collecting ring, when the unit rotates, the collecting ring support rotates, the heat extraction air shaft arranged on the collecting ring support rotates under the driving of the collecting ring support to generate an axial pressure head, and then hot air in the top cover is extracted, so that the accident that the collecting ring and the electric brush are burnt out after the temperature of the collecting ring and the brush holder device is higher and exceeds the insulation tolerance temperature of the generator motor is avoided.

2. The heat-extraction air shaft is a component formed by welding a plurality of parts into a whole, and is simple in structure and easy to manufacture and maintain.

3. The heat-extraction air shaft is fixed on the collecting ring by bolts, so that the heat-extraction air shaft is convenient to mount.

4. The driving end of the heat-extraction air shaft is the collecting ring, an exhaust fan which can operate without an external power supply is not needed, accidents caused by power failure or exhaust fan faults can be avoided, and the operation reliability of the generator motor is greatly improved.

5. The heat extraction air shaft of the invention avoids the electric shock risk of overhaul and maintenance personnel because the exhaust fan can operate without an external power supply.

Description of the drawings:

FIG. 1 is a schematic cross-sectional view of the present invention

FIG. 2 is a schematic cross-sectional view of the present invention

FIG. 3 is a schematic top view of FIG. 1

FIG. 4 is a cross-sectional view of FIG. 1A-A

FIG. 5 is a cross-sectional view of FIG. 1B-B

Reference numbers in the drawings indicate:

1. a top plate; 2. an intermediate barrel; 3. a fan blade; 4. a middle plate; 5. a shaft body; 6. a base plate; 7. a bolt; 8. a collecting ring support; 9. top cover

The specific implementation mode is as follows:

as shown in fig. 1, 2, 3, 4 and 5, the heat removal air shaft of the generator motor comprises a top plate 1, a middle cylinder 2, fan blades 3, a middle plate 4, a shaft body 5 and a bottom plate 6; roof 1 sets up 2 inboards in the middle of a section of thick bamboo and welds with middle section of thick bamboo 2, flabellum 3 sets up between middle section of thick bamboo 2 and axle body 5 and welds with middle section of thick bamboo 2 and axle body 5, middle section of thick bamboo 2 sets up on intermediate lamella 4 and welds with intermediate lamella 4, intermediate lamella 4 sets up at axle body 5 inboards and welds with axle body 5, axle body 5 sets up on bottom plate 6 and welds with bottom plate 6, bottom plate 6 sets up on collecting ring support 8, fix closing on collecting ring support 8 through bolt 7, by intermediate lamella 4, axle body 5, inner chamber E that bottom plate 6 encloses and the inner space D UNICOM of overhead guard 9, by intermediate lamella 4, axle body 5, inner chamber E that bottom plate 6 encloses and the upper portion space F UNICOM of overhead guard 9.

Finally, the scope of protection of the invention is not limited to the embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.