CN201063467Y - High-power high-voltage solid rotor permanent-magnet motor rotor shaft radial ventilation system - Google Patents

Abstract

The high-power high-voltage solid rotor permanent magnet motor rotor shaft radial ventilation system relates to a permanent magnet motor rotor ventilation system to solve the poor ventilation effect of the existing high-voltage permanent magnet motor solid rotor, which easily leads to excessive temperature rise of the solid rotor. High, causing irreversible high-temperature loss of magnetism to the permanent magnet on the rotor side. Its solid rotor has a plurality of ventilation slots on the inner surface of the solid rotor, and a plurality of rotor ventilation holes are opened between the bottom end surface of the ventilation slots and the outer surface of the solid rotor. Multiple stator ventilation holes are opened between the circular surfaces, and the centrifugal fan is arranged on the motor shaft. The cooling air produced by the motor rotor ventilation system of the utility model can take away a large amount of heat generated by the motor, effectively reduce the temperature rise of the motor rotor, prolong the working life of the permanent magnet and the entire motor, and enhance the overload capacity of the motor.

Description

High-power high-voltage solid rotor permanent magnet motor rotor shaft radial ventilation system

technical field

The utility model relates to a ventilation system for a rotor of a permanent magnet motor.

Background technique

High-power high-voltage induction motors are widely used in fans, water pumps and other occasions. With the implementation of national energy policies, the requirements for energy conservation in this industrial field are getting higher and higher. The application of ordinary laminated rotor high-voltage permanent magnet motor can improve the power saving efficiency, but the motor itself has poor starting performance, large starting current and small starting torque; on the other hand, the rigidity of the motor rotor is poor, and the processing technology is also poor. quite complicated. Compared with the above-mentioned motors, the solid rotor high-voltage permanent magnet motor not only has a good energy-saving effect, but also has a significantly improved starting performance. When the cyclical rated load works, the temperature rise of the rotor temperature will be higher, which will easily cause irreversible high-temperature demagnetization of the permanent magnet on the rotor side, resulting in damage to the motor.

Utility model content

The utility model provides a high-power high-voltage solid rotor in order to solve the problem that the solid rotor of the existing high-voltage permanent magnet motor has poor ventilation effect, which easily causes the temperature rise of the solid rotor to be too high, and causes irreversible high-temperature demagnetization of the permanent magnet on the rotor side. Permanent magnet motor rotor shaft radial ventilation system. The utility model is composed of a stator 1, a solid rotor 2, a centrifugal fan 6, a motor shaft 7 and a magnetic isolation part 8. The magnetic isolation part 8 is sleeved on the motor shaft 7, and the solid rotor 2 is sleeved on the magnetic isolation part 8. There is an air gap 9 between the inner surface of the stator 1 and the outer surface of the solid rotor 2, and a plurality of ventilation channels 5 are opened on the inner surface of the solid rotor 2, and the bottom surface of the ventilation channels 5 and the solid rotor A plurality of rotor ventilation through holes 3 are opened between the outer circular surfaces of the stator 1, a plurality of stator ventilation through holes 4 are opened between the inner circular surface and the outer circular surface of the stator 1, and the centrifugal fan 6 is arranged on the motor shaft 7 .

Working principle: under the action of the centrifugal fan 6, the cooling air enters the interior of the solid rotor 2 from the multiple air channel slots 5, and the cooling air enters the multiple rotor ventilation through holes 3 under the action of the centrifugal force generated by the rotation of the solid rotor 2, and enters the After the cooling air in the rotor ventilation holes 3 merges with the cooling air in the air gap 9, it also enters the plurality of stator ventilation holes 4 under the action of centrifugal force, so as to achieve the effect of cooling the solid rotor.

The beneficial effect of the utility model is that: the cooling wind generated by the ventilation system composed of the rotor ventilation hole, the stator ventilation hole, the air gap and the centrifugal fan can take away a large amount of heat generated by the motor, which can effectively reduce the temperature rise of the motor rotor and prolong the life of the motor. The working life of the permanent magnet and the entire motor can be improved, and the overload capacity of the motor can be enhanced.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model, and Fig. 2 is a sectional view of A-A of Fig. 1 .

Detailed ways

Specific embodiment 1: Referring to Fig. 1 and Fig. 2, this embodiment consists of a stator 1, a solid rotor 2, a centrifugal fan 6, a motor shaft 7 and a magnetic isolation member 8, and the magnetic isolation member 8 is sleeved on the motor shaft 7, The solid rotor 2 is sleeved on the magnetic isolation part 8, there is an air gap 9 between the inner surface of the stator 1 and the outer surface of the solid rotor 2, and a plurality of ventilation channels 5 are opened on the inner surface of the solid rotor 2 A plurality of rotor ventilation through holes 3 are opened between the bottom end surface of the ventilation channel 5 and the outer circular surface of the solid rotor 2, and a plurality of stator ventilation through holes are opened between the inner circular surface and the outer circular surface of the stator 1 4. The centrifugal fan 6 is set on the motor shaft 7 . Under the action of the centrifugal fan 6, cooling air is generated in the ventilation channel 5 of the solid rotor 2, and the cooling air in the ventilation channel 5 passes through the rotor ventilation through hole 3 under the action of the centrifugal force of the rotor rotation, and the air gap 9 The cooling air in the air flows into the stator ventilation hole 4 after converging, so as to achieve the effect of cooling the solid rotor 2.

Claims (1)

1. High-power high-voltage solid rotor permanent magnet motor rotor shaft radial ventilation system, which consists of stator (1), solid rotor (2), centrifugal fan (6), motor shaft (7) and magnetic isolation parts (8) , the magnetic isolation part (8) is sleeved on the motor shaft (7), the solid rotor (2) is sleeved on the magnetic isolation part (8), the inner circle surface of the stator (1) and the outer circle of the solid rotor (2) There is an air gap (9) between the surfaces, which is characterized in that a plurality of ventilation channels (5) are opened on the inner surface of the solid rotor (2), and the bottom surface of the ventilation channel (5) is connected with the solid rotor (2). There are a plurality of rotor ventilation through holes (3) between the outer circular surfaces of the stator (1), and a plurality of stator ventilation through holes (4) are opened between the inner and outer circular surfaces of the stator (1), and the centrifugal fan ( 6) Set on the motor shaft (7).

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