CN202395554U - rotary compressor - Google Patents

Abstract

A rotary compressor, the housing is provided with a motor and a compression mechanism, the motor includes a rotor and a stator, the rotor includes a rotor core formed by laminating multiple rotor punches and a permanent magnet, and the permanent magnet is built in the rotor core; The permanent magnets are twisted at a certain angle along the axis of the motor; the rotor iron core is twisted at the same angle corresponding to the permanent magnets to embed the permanent magnets. The twist angle α of the permanent magnet is between 1° and 30°; wherein, α is the maximum twisted angle of both ends of the permanent magnet. The permanent magnet is in the shape of a rectangle or a magnetic tile. The permanent magnets are magnetized radially or in parallel. The utility model twists the permanent magnet at a certain angle along the axial direction of the motor, so that the oblique pole of the permanent magnet not only significantly improves the voltage waveform induced in the stator winding, but also reduces the cogging torque and the torque ripple of the motor And stray loss, to achieve high efficiency, low vibration, low noise and smooth operation of the compression system.

Description

rotary compressor

technical field

The utility model relates to a rotary compressor.

Background technique

A significant portion of the noise of a rotary compressor comes from the permanent magnet motor that powers the compressor. However, due to the influence of cogging torque and non-sinusoidal harmonics of the back EMF waveform, the permanent magnet motor will increase the load torque ripple, resulting in increased vibration and noise, thereby affecting the performance of the entire compressor system.

In order to reduce harmonics and reduce noise and vibration, many methods and measures have been proposed. It mainly includes: using bread-shaped permanent magnets, stator chute and so on. The use of bread-type permanent magnets is mainly aimed at surface-mounted rotor structures, and is not suitable for built-in structures; while the use of stator inclined slots will reduce the utilization of stator slots and increase the difficulty of winding, which is not conducive to the realization of automatic winding processes .

Utility model content

The purpose of this utility model is to provide a rotary compressor with simple and reasonable structure, flexible operation, small cogging torque, low vibration, low noise, small torque ripple, small stray loss, high efficiency and stable operation, so as to overcome the existing There are deficiencies in the technology.

A rotary compressor designed for this purpose has a motor and a compression mechanism inside the housing. The motor includes a rotor and a stator. The rotor includes a rotor core and a permanent magnet made of laminated rotor blades. Its structural characteristics The permanent magnet is built into the rotor iron core; the permanent magnet is twisted at a certain angle along the axis of the motor; the rotor iron core is twisted at the same angle corresponding to the permanent magnet to embed the permanent magnet.

The twist angle α of the permanent magnet is between 1° and 30°; wherein, α is the maximum twisted angle of both ends of the permanent magnet.

The permanent magnet is in the shape of a rectangle or a magnetic tile.

The permanent magnets are magnetized radially or in parallel.

The utility model twists the permanent magnet at a certain angle along the axial direction of the motor, so that the oblique pole of the permanent magnet significantly improves the voltage waveform induced in the stator winding, reduces the cogging torque, and reduces the torque ripple of the motor and Stray losses for high efficiency, low vibration, low noise and smooth operation of the compression system.

The utility model has the characteristics of simple and reasonable structure, flexible operation, small cogging torque, low vibration, low noise, small torque pulsation, small stray loss, high efficiency and stable operation.

Description of drawings

Fig. 1 is a top view structural diagram of an embodiment of the utility model.

Fig. 2 is a schematic diagram of the three-dimensional structure of the permanent magnet.

FIG. 3 is an axial schematic view of FIG. 2 .

In the figure: 1 is the rotor core, 2 is the permanent magnet, 3 is the screw hole, and 4 is the rotor main shaft hole.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Referring to Figures 1-3, the rotary compressor has a motor and a compression mechanism inside the housing. The motor includes a rotor and a stator. The rotor includes a rotor core 1 and a permanent magnet 2 formed by laminating multiple rotor punches. The permanent magnet 2 is built into the rotor core 1; the permanent magnet 2 is twisted at a certain angle along the axis of the motor; the rotor core 1 is twisted at the same angle corresponding to the permanent magnet 2 to embed the permanent magnet 2.

In this embodiment, the twist angle α of the permanent magnet 2 is between 1° and 30°; wherein, α is the maximum twisted angle of both ends of the permanent magnet 2 . The shape of the permanent magnet 2 can be rectangular or magnetic tile. The permanent magnet 2 can be magnetized radially or magnetized in parallel.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the actual spirit scope of the utility model, the implementation of the above The changes and modifications of the examples all fall within the scope of the claims of the present utility model.

Claims (4)

1. a rotary compressor is provided with motor and compressing mechanism in the housing, and motor comprises rotor and stator, and rotor includes rotor core (1) and the permanent magnet (2) that is overrided to form by the multi-disc rotor punching, it is characterized in that permanent magnet (2) is built in rotor core (1); Permanent magnet (2) reverses certain angle along the axis direction of motor; Rotor core (1) reverses equal angular to embed permanent magnet (2) corresponding to permanent magnet (2).

2. rotary compressor according to claim 1, the windup-degree α that it is characterized in that said permanent magnet (2) is between 1 ° to 30 °; Wherein, α is the maximum angle that the both ends of the surface of permanent magnet (2) are reversed.

3. rotary compressor according to claim 1 and 2 is characterized in that the rectangular or magnetic shoe shape of said permanent magnet (2).

4. rotary compressor according to claim 3 is characterized in that said permanent magnet (2) is radial magnetizing or parallel magnetization.

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