JP4782888B1 - Internal air cooling of the generator motor by air suction. - Google Patents

Abstract

A gas is pumped by an axial fan in a sealed container, cooled outside the motor, and returned to the inside of the motor.
SOLUTION: The power generation motor is sucked into the air and internally cooled, and it is possible to select whether the suction motor is mounted on the motor according to the location where the power generation motor is installed or whether the suction device is installed at a remote location. Air taken in from the lid, air that has passed through the gap between the rotary shaft, rotor, and stator yoke slot absorbs heat from the rotary shaft, rotor, and slot, and air that has passed through the gap between the stator outer periphery and the motor case inside the stator. It absorbs the heat of the air and sucks it with a turbo fan or a compressor from the suction port attached to the rear lid.
[Selection] Figure 2

Description

  The present invention is in the field of power motors and generators.

  A cooling method in which a gas inlet and an outlet are provided in a rotary electric motor body, an air flow is pumped, and the air is returned to the inside of the electric motor body through the outlet and a sealed cooling device.

Utility model registration No. 3075563

  The problem to be solved is that the gas inside the motor body is pushed out to cool the gas by either natural air cooling by the exhaust heat fin provided outside or gas cooling by the fan, and the heat energy of the gas is sent to the outside In order to diverge, a centrifugal subflow fan or an axial fan is provided on the output shaft inside the motor, and a high-temperature gas is pushed into the cooling device by a cooling device, a heat exhaust plate, a heat absorption fin, and an air filtering device to circulate and exhaust heat. , The pressure-feed type circulation heat exhaust device was eliminated.

  The present invention is a power generation motor in which an air passage is provided inside a motor that cools the inside of the power generation motor by suction air and air. The power generation motor is hermetically sealed, and an air intake is provided in the front cover or the front cover side motor case. A generator motor case that only has a hole to allow the coil lead wire to pass through, creating a suction port, and the motor fixed angle legs are welded to the left and right sides of the case. A space is created between the case side of the stator yoke to be inserted into the case and the inside of the case, and an air passage is provided. The internal air cooling of the generator motor is a clearance between the rotary shaft rotor and the cylindrical inner circumference of the slot on the stator yoke side. Is the NO1 air-cooled air passage, and the NO2 air passage that allows air to pass through the gap between the outer side of the stator yoke and the inner side of the motor case is equally divided into the circumference inside the motor case, with the gap material sandwiched between every other division range, and the rest The other divided range is the NO2 air passage, or when the stator is manufactured, the recessed portion is formed in the other divided range portion of the outer peripheral divided portion to make the NO2 air passage, and with the bearing case on the rotary shaft power transmission side A hole in the air intake opening that surrounds the bearing case on the front lid. A hole is opened at the bottom to make a strong air suction port. The suction port of the turbo fan or compressor is closely attached to the suction port, and the air passing through the NO1 air passage between the rotor and slot in the motor and the stator yoke Air is cooled by sucking only the air that passes through the NO2 air passage between the motor case and the motor case. The suction port of the internal air-cooled turbo fan is opened diagonally below the bearing case of the rear cover so that water drops can be sucked out. In addition, when dust or iron powder jumps from the air intake port, the gap between the rotor and stator slots is attracted by the magnetic force and the rotor does not rotate, so a dust collection filter is attached to each air intake port, and the entire front lid is also filtered. If you use a generator motor in a place close to a heat source, place it in the air intake. Attach the pipe and extend the pipe to the cold air to take in the air.

The air sucked by the suction force of the turbo fan and compressor is easy to pass through the NO2 air-cooled air passage, so a thin cylindrical film or wall is formed between the NO1 air passage and the NO2 air passage on the rear cover side of the generator motor. Suction when the NO1 air passage and the NO2 air passage are formed between the rear lid and the stator is divided into one NO.sub.1 air passage and a NO.sub.2 air passage by a Y-shaped pipe, and air is sucked uniformly. Or, when sucking with two turbo fans or two compressors, make two suction ports on the rear lid side and suck the air in the NO1 air passage and NO2 air passage by installing two suction machines In this case, the air intake of the NO1 air passage on the front lid side is the area surrounding the bearing case.

In order to bring the air intake port and suction port into close contact with each other, attach a flange to the outside of the back cover with a motor case or bearing case and a flange on the suction device port, and bolt the flange, or attach a screw socket to the motor and use the suction device. A small turbofan, which is also piped with a threaded pipe at the suction port, is provided with a cylindrical turbofan storage part on the rear cover of the generator motor, or a member storing the turbofan is arranged away from the generator motor for suction. Extend the pipe to the inlet.

The turbo fan installed in the strong air suction port is connected to the input line of the three-phase motor that directly drives and rotates the turbo fan with the three-phase output line of the generator motor. Alternatively, rotate the turbofan with a single-phase motor, or attach a pulley to the rear cover side of the motor rotation shaft and rotate the turbofan with a belt, increase the rotation speed with a large pulley on the rotation drive side and a small pulley on the driven turbofan side Or, add a gear to the rotating shaft and combine the gears to rotate the turbo fan, the rotational drive side of the gear increases the rotation speed of the turbo fan with a large gear and the driven side with a small gear, other than the turbo fan, the propeller Fans, sirocco fans, etc. can suck air and cool it, and in addition to fans, use the suction power of the compressor. Yes, there are two types of compressors, reciprocating and rotating types, turbo type and volume type. If the suction volume is large, the cooling air of several generator motors can be sucked by one compressor. Use the rotational force of the rotating shaft of the generator motor, or rotate and suck the compressor of the three-phase motor with self-generated electricity, and reduce the size of the turbo fan, rotary scroll, etc. inside the rear cover of the generator motor case The turbo fan may be used in a vacuum cleaner or the like.

The air-cooled generator motor of the present invention sufficiently cools the rotating shaft, rotor, and motor case on the air-cooled air intake side, reducing the magnetic force of the magnet rotor due to the heat generated by the generator motor and reducing the torque due to the heat generated by the iron core rotor. Prevents the rotation force from increasing and the generator motor lasts for a long time, and the fixed coil air cooling fin attached to the rotor is no longer needed. Depending on the installation location, one or two suction machines can be used, or a separate suction machine can be selected.

Assemble and fix the front and rear lids with bearing case to the motor case by turning the left and right ends of the cylinder of the motor case to the inner diameter of the inner half of the plate thickness. Laminate the frame reinforcement material in a cross shape and machine it so that the inside of the frame can be pushed into the cylinder of the motor case, and make the inner circle center of the stator yoke and the center of the left and right lids of the bearing case match, and the motor case To fix the lid with the bearing case after all, the bolts are drilled into the square bars on the outer side of the cross frame reinforcement part of the lid frame and welded, the square nuts are also welded to the same places on the motor case, and the front and rear lids are fixed with bolts.

Front lid air intake diagram. Motor cross section, air passage, and two turbo fans.

DESCRIPTION OF SYMBOLS 1 Air intake 2 Front lid fixing bolt and fixture 3 Rotating shaft 4 Bearing case reinforcement 5 Bearing case 6 Rear lid turbofan case 7 Rotating shaft pulley 8 Pulley belt 9 Wall 10 separating the rear lid side NO1 air passage from the NO2 air passage Air intake port 11 Air intake port 12 Safety cover 13 Air passage NO2
14 Air passage NO1
15 Bearing 16 Dust filter mounting portion 17 Turbo fan Pulley 18 Turbo fan shaft bearing bearing outer material 19 Rotor 20 Fixed coil

Claims (2)

This is a suction air / air cooling structure for a generator motor characterized by the following requirements.
(B) The internal air passage for air-cooling the generator motor is divided on the inner circumference side of the motor case, and a gap filling material is inserted into every other divided portion, and the gap between the stator outer circumference side and the motor case inner circumference side is NO, 2 air At the time of manufacture of the passage or stator, a recess is made in the divided range on the outer periphery of the stator to make a NO, 2 air passage, and the air entered from the air intake opening in the front cover with the rotating shaft bearing case is the rotating shaft rotor The space between the outer circumference and the inner circumference of the stator yoke fixed coil slot is NO, 1 air passage (b) The front lid side air intake is fitted with a pipe at the intake near the heat source The pipe is extended to a cool air location, and the suction air is cooled by a single suction device using a single suction port opened in the rear cover, and suction is applied to the lower side of the rear lid of the motor case or the lower side of the rear lid. Make mouth Absorbing water droplets (c) NO, as described in 1) above, a thin cylindrical film or wall between the rear lid and the stator is created between the 1 air passage and NO, 2 air passage, and one suction When using a single suction device for the mouth, it is divided into NO, 1 air passage and NO2 air passage with a Y-tube, and air is evenly sucked. Increase the suction capacity by making two suction ports on the side (d) Since dust or iron powder jumps from the air intake described in b) above, attach a dust collection filter individually to the air intake or the entire front cover (2) The rear cover suction port described in c) above has a turbo fan such as a vacuum cleaner, a propeller fan, and a sirocco fan. A gear is attached and the rotational force of the rotating shaft of the generator motor is used as the power source. That the few cars power generation motor when the suction volume suction force is also available in, such as repressor is greater it can be aspirated with a single compressor The suction internal air-cooling according to claim 1 can air-cool all the sealed motor fixing coils and rotors, and the open-type motor can be closed by closing the motor case on the rear lid side and attaching the suction port to the rear lid. Air-cooled structure that can be cooled by suction air.