Active cooling motor rotor

Abstract

The utility model provides a kind of active cooling type motor rotor belongs to mechanical technical field.It solves the problem that current motor rotor cannot be better cooling cooling down.This active cooling type motor rotor, including rotor core, rotating shaft and permanent magnet, permanent magnet is fixed on rotor core, and cooling cavity for air circulation is equipped between rotor core and rotating shaft, and guide vane is fixed on rotating shaft and guide vane can introduce air into cooling cavity.This active cooling type motor rotor has the advantages of good heat dissipation effect and long service life.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a motor rotor, particularly an active cooling motor rotor. Background Technology

[0002] The electric motor is a crucial component of the compressor, a driven fluid machine that elevates low-pressure gas to high-pressure gas; it is the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it using the piston driven by the motor, and then discharges high-temperature, high-pressure refrigerant gas through the exhaust pipe. During the use of variable frequency compressors, we have found that the compressor rotor vibrates significantly at low frequencies and generates substantial heat during high-frequency operation. This leads to accelerated wear between the friction pairs of the equipment, and the continuous accumulation of excess heat can even directly burn out the friction surfaces, causing a major machine accident. Existing technologies use refrigerant return or exhaust cooling to dissipate heat from the compressor rotor, but these methods still cannot completely solve the problem of rotor overheating at high frequencies. Therefore, how to solve the problem of rotor overheating at high frequencies is an urgent issue that engineers need to address.

[0003] For example, a rotor assembly structure disclosed in Chinese patent literature (application number: 201920881328.7) includes a shaft, bearings, a bushing, a snap ring, a spring, and washers. The bearings are sleeved on the shaft; the bushing is sleeved on the outside of the bearings; the snap ring, spring, and washers are all disposed between the bearings, and all are sleeved on the shaft; the spring is disposed between the washers; the inner ring of the bushing is respectively provided with a first groove and a second groove, and an O-ring is embedded and connected in the first groove; the snap ring is engaged in the second groove. However, when this rotor is working, because it does not have a drainage structure, it cannot be effectively cooled. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an active cooling motor rotor that has good heat dissipation and a long service life.

[0005] The purpose of this utility model can be achieved through the following technical solution: an active cooling motor rotor, including a rotor core, a shaft and a permanent magnet, wherein the permanent magnet is fixedly connected to the rotor core, characterized in that a cooling cavity for air circulation is provided between the rotor core and the shaft, and a guide vane is fixedly connected to the shaft and the guide vane can introduce air into the cooling cavity.

[0006] When the rotor of this motor is working, the guide vanes rotate synchronously with the shaft, and the air outside the rotor core is transported into the cooling chamber through the guide vanes, which improves the heat dissipation effect on the shaft and the rotor core, and gives the rotor of this motor a longer service life.

[0007] In the aforementioned actively cooled motor rotor, the guide vanes are helical, and their outer ends extend beyond the outer end face of the rotor core. The helical shape of the guide vanes, with their outer ends extending beyond the outer end face of the rotor core, provides the advantage of good airflow guidance.

[0008] In the aforementioned actively cooled motor rotor, the rotor core is provided with several cooling channels, and these cooling channels are connected to the cooling chamber. By connecting the cooling channels to the cooling chamber, the heat dissipation effect on the rotor core is increased.

[0009] In the aforementioned actively cooled motor rotor, the outer wall of the rotor core is provided with several guide grooves, which are located outside the permanent magnet. By setting the aforementioned guide grooves and guide vanes, heat can be dissipated from the side wall of the rotor core, thus improving the heat dissipation effect.

[0010] In the aforementioned actively cooled motor rotor, the guide groove is equipped with elastic guide vanes. By setting the guide groove and guide vanes, heat can be dissipated from the sidewalls of the rotor core, thus improving the heat dissipation effect.

[0011] In the aforementioned actively cooled motor rotor, the guide vanes are threadedly connected to the shaft. This configuration offers the advantages of easy assembly and disassembly, as well as a secure connection.

[0012] In the aforementioned active cooling motor rotor, a locking nut is provided between the guide vane and the rotating shaft, and the locking nut presses against the guide vane.

[0013] Compared with existing technologies, the active cooling motor rotor has the following advantages:

[0014] 1. The guide vanes rotate synchronously with the shaft, and transport the air outside the rotor core to the cooling chamber through the guide vanes, which improves the heat dissipation effect on the shaft and rotor core, and makes the rotor of this motor have a longer service life.

[0015] 2. The guide vanes are spiral-shaped, with their outer ends extending beyond the outer end face of the rotor core, which has the advantage of good air guiding effect;

[0016] 3. Several flow guide grooves are provided on the outer side wall of the rotor core. The flow guide grooves are located on the outside of the permanent magnet, which can dissipate heat from the side wall of the rotor core and improve the heat dissipation effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the rotor of this active cooling motor.

[0018] Figure 2 This is a front view schematic diagram of the rotor of this active cooling motor.

[0019] Figure 3 yes Figure 2 A schematic diagram of the AA section.

[0020] In the diagram, 1 is the rotor core; 1a is the cooling channel; 1b is the guide groove; 2 is the cooling chamber; 3 is the shaft; 4 is the permanent magnet; 5 is the guide vane; 6 is the guide plate; and 7 is the locking nut. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figures 1 to 3 As shown, the active cooling motor rotor includes a rotor core 1, a rotating shaft 3, and a permanent magnet 4. The permanent magnet 4 is fixedly connected to the rotor core 1. The characteristic feature is that a cooling chamber 2 for air circulation is provided between the rotor core 1 and the rotating shaft 3. A guide vane 5 is fixedly connected to the rotating shaft 3 and the guide vane 5 can introduce air into the cooling chamber 2. The guide vane 5 is spiral and the outer end of the guide vane 5 extends out of the outer end face of the rotor core 1.

[0023] The rotor core 1 is provided with several cooling channels 1a and the cooling channels 1a are connected to the cooling chamber 2, which increases the heat dissipation effect of the rotor core 1.

[0024] The outer wall of the rotor core 1 is provided with several guide grooves 1b. The guide grooves 1b are located outside the permanent magnet 4. The guide grooves 1b are provided with elastic guide plates 6, which can dissipate heat from the side wall of the rotor core 1 and improve the heat dissipation effect.

[0025] The guide vane 5 is threadedly connected to the rotating shaft 3. A locking nut 7 is provided between the guide vane 5 and the rotating shaft 3. The locking nut 7 presses against the guide vane 5, which has the advantages of easy disassembly and assembly and a firm connection.

[0026] When the motor rotor is working, the guide vanes 5 rotate synchronously with the shaft 3. The guide vanes 5 transport the air outside the rotor core 1 into the cooling chamber 2, improving the heat dissipation effect on the shaft 3 and the rotor core 1, thus giving the motor rotor a longer service life. The guide vanes 5 are spiral-shaped, with their outer ends extending out of the outer end face of the rotor core 1, which has the advantage of good air guiding effect.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0028] Although this document frequently uses terms such as rotor core 1, cooling channel 1a, guide groove 1b, cooling chamber 2, rotating shaft 3, permanent magnet 4, guide vane 5, guide plate 6, and locking nut 7, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A motor rotor with active cooling, comprising a rotor core (1), a rotating shaft (3) and permanent magnets (4) fixed to the rotor core (1), characterized in that, A cooling chamber (2) for air circulation is provided between the rotor core (1) and the rotating shaft (3). A guide vane (5) is fixedly connected to the rotating shaft (3) and the guide vane (5) can introduce air into the cooling chamber (2).

2. The actively cooled motor rotor of claim 1, wherein, The guide vane (5) is spiral-shaped and the outer end of the guide vane (5) extends out of the outer end face of the rotor core (1).

3. The actively cooled motor rotor of claim 2, wherein, The rotor core (1) is provided with several cooling channels (1a) and the cooling channels (1a) are connected to the cooling chamber (2).

4. The actively cooled motor rotor of claim 1 or 2 or 3, wherein, The outer wall of the rotor core (1) is provided with several guide grooves (1b), and the guide grooves (1b) are located on the outside of the permanent magnet (4).

5. The actively cooled motor rotor of claim 4, wherein, The guide groove (1b) is provided with an elastic guide plate (6), and the guide vane (5) is threadedly connected to the rotating shaft (3).

6. The actively cooled motor rotor of claim 1 or 2 or 3, wherein, A locking nut (7) is provided between the guide vane (5) and the rotating shaft (3), and the locking nut (7) presses against the guide vane (5).

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