Segmented rotors, motors, compressors and air conditioners

Abstract

The present invention discloses a segmented rotor, a motor, a compressor and an air conditioner, and relates to the technical field of heat exchange devices. The present invention provides a segmented rotor, including a first rotor structure and a second rotor structure arranged in segments, wherein the first rotor structure is provided with a magnetic steel slot structure different from the second rotor structure. The "V"-shaped magnetic steel slot structure arranged on the first rotor structure, compared with the "I"-shaped magnetic steel slot structure arranged on the second rotor structure, makes the electromagnetic force received by the first rotor structure greater than the electromagnetic force received by the second rotor structure, greatly reducing the eccentric distance of the rotor rotation, thereby reducing the vibration noise of the motor.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange devices, and in particular to a segmented rotor, a motor, a compressor and an air conditioner. Background Art

[0002] The rotor assembly inside the existing variable frequency air-conditioning compressor is generally on one side of the bearing, while the rotor structure on the other side is suspended. Therefore, during the operation of the compressor, under the action of the cantilever and the electromagnetic force of the motor, the rotation center of the rotor assembly on the suspended side will be offset during the rotation process, causing the rotor to be displaced in the radial direction. Therefore, the rotor will form a conical rotation when rotating. At this time, the rotation center is not concentric with the magnetic field center of the stator, causing the motor to be eccentric. The eccentricity of the motor will cause the frequency of the electromagnetic force to be modulated with the rotation frequency, increasing the amplitude of the electromagnetic force and the order frequency, thereby causing the motor to vibrate more, and ultimately increasing the vibration noise of the motor. Summary of the invention

[0003] In order to reduce the vibration and noise of the motor, the technical solution of the present invention provides a segmented rotor, a motor, a compressor and an air conditioner. The technical solution is as follows:

[0004] On the one hand, the present invention provides a segmented rotor, including a first rotor structure and a second rotor structure arranged in segments, and the first rotor structure is provided with a magnetic steel slot structure different from that of the second rotor structure.

[0005] Specifically, a "V"-shaped magnetic steel slot structure is provided on the first rotor structure, and an "I"-shaped magnetic steel slot structure is provided on the second rotor structure.

[0006] Through the "V"-shaped magnetic steel slot structure provided on the first rotor structure, compared with the "I"-shaped magnetic steel slot structure provided on the second rotor structure, the electromagnetic force received by the first rotor structure is greater than the electromagnetic force received by the second rotor structure, so that the first rotor structure can provide a larger magnetic density, thereby ensuring that the motor has a larger output torque. At the same time, the electromagnetic force received by the second rotor structure is reduced, thereby reducing the disturbance during the rotation of the rotor structure, so that the rotation of the rotor changes from conical to cylindrical, which greatly reduces the eccentric distance of the rotor rotation, thereby reducing the vibration noise of the motor.

[0007] Specifically, the first rotor structure is close to the power output end of the motor, and the second rotor structure is far away from the power output end of the motor.

[0008] Specifically, the diameter of the first rotor structure is greater than or equal to the diameter of the second rotor structure.

[0009] In particular, the segmented rotor also includes a third rotor structure, the first rotor structure is close to the power output end of the motor, the second rotor structure is far away from the power output end of the motor, the third rotor structure is placed between the first rotor structure and the second rotor structure, the first rotor structure is provided with a "V"-shaped magnetic steel slot structure, the second rotor structure is provided with an "I"-shaped magnetic steel slot structure, and the third rotor structure is provided with a "U"-shaped magnetic steel slot structure.

[0010] By setting the "U"-shaped magnetic steel slot structure on the third rotor structure, the electromagnetic force applied to the third rotor is between the first rotor structure and the second rotor structure, thereby ensuring the stability of the electromagnetic force applied to the entire segmented rotor.

[0011] Specifically, the diameter of the first rotor structure is greater than or equal to the diameter of the third rotor structure, and the diameter of the third rotor structure is greater than or equal to the diameter of the second rotor structure.

[0012] Specifically, the electromagnetic force amplitude of the first rotor structure is greater than the electromagnetic force amplitude of the third rotor structure, and the electromagnetic force amplitude of the third rotor structure is greater than the electromagnetic force amplitude of the second rotor structure.

[0013] On the other hand, the present invention also provides a motor, including a stator core and a winding, and also a segmented rotor.

[0014] In particular, the ratio of the inner diameter of the stator core to the outer diameter of the segmented rotor is between 1.64 and 2.24.

[0015] On the other hand, the present invention also provides a compressor, including a bearing and a motor.

[0016] On the other hand, the air conditioner includes an indoor unit and an outdoor unit, and the outdoor unit includes a compressor.

[0017] Compared with the prior art, the present invention has the following beneficial effects: through the "V"-shaped magnetic steel slot structure provided on the first rotor structure, compared with the "I"-shaped magnetic steel slot structure provided on the second rotor structure, the electromagnetic force received by the first rotor structure is greater than the electromagnetic force received by the second rotor structure, thereby enabling the first rotor structure to provide a larger magnetic flux density, thereby ensuring that the motor has a larger output torque. At the same time, the electromagnetic force received by the second rotor structure is reduced, thereby reducing the disturbance during the rotation of the rotor structure, so that the rotation of the rotor changes from a cone to a cylindrical shape, greatly reducing the eccentric distance of the rotor rotation, thereby reducing the vibration noise of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention, in which:

[0019] Figure 1It is a schematic diagram of the three-dimensional structure of a rotor in the prior art;

[0020] Figure 2 is a schematic diagram of a three-dimensional structure of a segmented rotor having two rotor structures;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of a segmented rotor having three rotor structures;

[0022] Figure 4 A performance parameter comparison table of a rotor in the prior art and a rotor in two embodiments of the present invention;

[0023] Figure 5 is a comparison table of the 6th order vibration amplitudes of the rotor in the prior art and the rotors in the two embodiments of the present invention;

[0024] Figure 6 This is a comparison table of the 6th frequency noise of the rotor in the prior art and the rotor in two embodiments of the present invention;

[0025] Figure 7 is a cross-sectional view of the compressor mentioned in this embodiment;

[0026] Figure 8 is a front view of the second rotor structure in this embodiment;

[0027] Fig. 9 is a front view of the first rotor structure in this embodiment;

[0028] Fig.10 It is a front view of the third rotor structure in this embodiment.

[0029] Reference numerals: 1 first rotor structure, 2 second rotor structure, 3 third rotor structure, 4 power output end of the motor, 5 "I"-shaped magnetic steel slot structure, 6 "V"-shaped magnetic steel slot structure, 7 "U"-shaped magnetic steel slot structure DETAILED DESCRIPTION

[0030] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0031] like Figure 1As shown, the current rotor structure is usually a single integral type. The rotor assembly inside the variable frequency air-conditioning compressor is generally on one side of the bearing, while the rotor structure on the other side is suspended. Therefore, during the operation of the compressor, under the action of the cantilever and the electromagnetic force of the motor, the rotation center of the rotor assembly on the suspended side will be offset during the rotation process, causing the rotor to be displaced in the radial direction. Therefore, the rotor will form a conical rotation when rotating. At this time, the rotation center is not concentric with the magnetic field center of the stator, causing the motor to be eccentric. The eccentricity of the motor will cause the frequency of the electromagnetic force to be modulated with the rotation frequency, increasing the amplitude of the electromagnetic force and the order frequency, thereby causing the motor to vibrate more, and ultimately increasing the vibration noise of the motor.

[0032] In order to reduce the vibration and noise of the motor, the technical solution of the present invention provides a motor and a compressor with a segmented rotor structure. The technical solution is as follows:

[0033] According to the following Figure 2 Figure 7 The present invention is further described in detail.

[0034] like Figure 2 , Figure 7 , Figure 8 and Fig. 9 As shown, on the one hand, the present invention provides a segmented rotor, including a first rotor structure 1 and a second rotor structure 2 which are arranged in segments, and the first rotor structure 1 is provided with a magnetic steel slot structure which is different from that of the second rotor structure 2 .

[0035] Specifically, a “V”-shaped magnetic steel slot structure 5 is provided on the first rotor structure 1 , and an “I”-shaped magnetic steel slot structure 6 is provided on the second rotor structure 2 .

[0036] By means of the "V"-shaped magnetic steel slot structure 5 provided on the first rotor structure, compared with the "I"-shaped magnetic steel slot structure 6 provided on the second rotor structure, the electromagnetic force received by the first rotor structure 1 is greater than the electromagnetic force received by the second rotor structure 2, thereby enabling the first rotor structure 1 to provide a larger magnetic flux density, thereby ensuring that the motor has a larger output torque. At the same time, the electromagnetic force received by the second rotor structure 2 is reduced, thereby reducing the disturbance during the rotation of the rotor structure, so that the rotation of the rotor changes from a cone to a cylindrical shape, greatly reducing the eccentric distance of the rotor rotation, thereby reducing the vibration noise of the motor.

[0037] Specifically, the first rotor structure 1 is close to the power output end 4 of the motor, and the second rotor structure 2 is far away from the power output end 4 of the motor.

[0038] Specifically, the diameter of the first rotor structure 1 is greater than or equal to the diameter of the second rotor structure 2 .

[0039] like Figure 3and Fig.10 As shown, the segmented rotor also includes a third rotor structure 3, the first rotor structure 1 is close to the power output end 4 of the motor, the second rotor structure 2 is far away from the power output end 4 of the motor, the third rotor structure 3 is placed between the first rotor structure 1 and the second rotor structure 2, the first rotor structure 1 is provided with a "V"-shaped magnetic steel slot structure 6, the second rotor structure 2 is provided with an "I"-shaped magnetic steel slot structure 5, and the third rotor structure 3 is provided with a "U"-shaped magnetic steel slot structure 7.

[0040] By setting the "U"-shaped magnetic steel slot structure 7 on the third rotor structure 3, the electromagnetic force received by the third rotor 3 is between the first rotor structure 1 and the second rotor structure 2, thereby ensuring the stability of the electromagnetic force of the entire segmented rotor.

[0041] Specifically, the diameter of the first rotor structure 1 is greater than or equal to the diameter of the third rotor structure 3, and the diameter of the third rotor structure 3 is greater than or equal to the diameter of the second rotor structure 2. Figure 4 It can be concluded that, in terms of electromagnetic force amplitude, the electromagnetic force amplitude of the first rotor structure 1 is greater than that of the third rotor structure 3, and the electromagnetic force amplitude of the third rotor structure 3 is greater than that of the second rotor structure 2. More specifically, the ratio of the outer diameter of the stator core to the outer diameter of the segmented rotor is between 1.6 and 2.2.

[0042] like Figure 4 As shown, the maximum eccentric displacement of the rotor during operation in the first embodiment is reduced by 65% ​​compared with the displacement in the existing solution, and the motor output torque is increased by 10.4%.

[0043] The maximum displacement of the rotor eccentricity during the operation of the rotor in the second embodiment is reduced by 72.5% compared with the displacement in the existing solution, and the motor output torque is increased by 18.8%.

[0044] like Figure 5 As shown, the vibration amplitudes in the first embodiment and the second embodiment are significantly reduced compared to the vibration values ​​in the prior art.

[0045] like Figure 6 As shown, the noise in the first embodiment and the second embodiment is reduced compared with the noise in the prior art, wherein the noise in the first embodiment is relatively lower than the noise in the second embodiment.

[0046] On the other hand, the present invention also provides a motor, including a stator core and a winding, and also a segmented rotor.

[0047] On the other hand, the present invention also provides a compressor, including a bearing and a motor.

[0048] On the other hand, the air conditioner includes an indoor unit and an outdoor unit, and the outdoor unit includes a compressor.

[0049] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention invented herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art of the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0050] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. Segmented rotor, characterized in that: The segmented rotor comprises a first rotor structure (1) and a second rotor structure (2) which are arranged in segments, the first rotor structure (1) being provided with a magnetic steel slot structure different from that of the second rotor structure (2), the segmented rotor further comprising a third rotor structure (3), the first rotor structure (1) being close to a power output end (4) of the motor, the second rotor structure (2) being far from the power output end (4) of the motor, the third rotor structure (3) being arranged between the first rotor structure (1) and the second rotor structure (2), the first rotor structure being provided with a "V"-shaped magnetic steel slot structure, the second rotor structure being provided with a "I"-shaped magnetic steel slot structure, and the third rotor structure being provided with a "U"-shaped magnetic steel slot structure, the diameter of the first rotor structure (1) being greater than or equal to the diameter of the third rotor structure (3), and the diameter of the third rotor structure (3) being greater than or equal to the diameter of the second rotor structure (2).

2. The segmented rotor according to claim 1, characterized in that: The electromagnetic force amplitude of the first rotor structure (1) is greater than the electromagnetic force amplitude of the third rotor structure (3), and the electromagnetic force amplitude of the third rotor structure (3) is greater than the electromagnetic force amplitude of the second rotor structure (2).

3. A motor, comprising a stator core and a winding, characterized in that: It also includes a segmented rotor as described in any one of claims 1-2.

4. The motor according to claim 3, characterized in that The ratio of the outer diameter of the stator core to the outer diameter of the segmented rotor is between 1.6 and 2.

2.

5. A compressor, comprising a bearing, characterized in that Also includes the motor as claimed in claim 3.

6. An air conditioner, comprising an indoor unit and an outdoor unit, characterized in that: The external machine includes the compressor as claimed in claim 5.

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