Motor and compressor having the same

Abstract

The present invention provides a motor and a compressor having the same. The motor includes a stator; an upper rotor disposed within the stator; a lower rotor disposed within the stator and spaced apart from the upper rotor; and a balancing portion connected to the lower rotor and located between the upper and lower rotors. The rotor is configured as a split structure having an upper rotor and a lower rotor, and the balancing portion is disposed between the upper and lower rotors. This configuration optimizes the axial height of the overall rotor structure, effectively reducing the deflection of a crankshaft passing through the upper and lower rotors, thereby improving the reliability of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor equipment, and in particular to a motor and a compressor having the same. Background Art

[0002] In traditional compressor design, primary and secondary balancing blocks are placed on the upper and lower sections of the motor rotor, respectively, to achieve torque balance with the eccentric structure of the pump body. However, due to the cantilever structure used to secure the crankshaft relative to the rotor and the asymmetric design of the balancing blocks, the compressor's crankshaft deflects excessively during rotation, creating a risk of the upper rotor end scraping. Furthermore, traditional compressors are equipped with mufflers, and rotating components must maintain sufficient safety distance. The presence of the primary balancing block limits the motor rotor's assembly height. This increased rotor assembly height increases crankshaft deflection, reducing motor reliability. Summary of the Invention

[0003] The main purpose of the present invention is to provide a motor and a compressor having the same, so as to solve the problem of low reliability of motors in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a motor is provided, comprising: a stator; an upper rotor, which is arranged in the stator; a lower rotor, which is arranged in the stator and is arranged at a distance from the upper rotor; and a balancing part, which is connected to the lower rotor and is located between the upper rotor and the lower rotor.

[0005] Furthermore, the balancing part includes a secondary balancing block connected to the end surface of the lower rotor facing the upper rotor, and at least part of the secondary balancing block is arranged at a distance from the upper rotor.

[0006] Furthermore, the height of the upper rotor in the axial direction is H1, and the height of the lower rotor in the axial direction is H2, wherein 0.57≤H1 / H2≤4.5.

[0007] Furthermore, the motor also includes: a housing; an upper stator, which is arranged in the housing and is matched with the upper rotor; a lower stator, which is arranged in the housing and is located below the upper stator, and is matched with the lower rotor; and a stator partition, which is arranged in the housing and is located between the upper stator and the lower stator.

[0008] Furthermore, the distance from the upper end surface of the upper rotor to the lower end surface of the lower rotor is H, wherein the height of the stator partition in the axial direction is H3, wherein H3≦0.3H.

[0009] Furthermore, the upper rotor and the lower rotor are provided with flow channels, the flow channels are extended along the axial direction of the shell, and the stator partition is provided with a communication channel in communication with the flow channels in the axial direction.

[0010] Furthermore, a flow passage is provided on the lower rotor, and a communication passage communicating with the flow passage is provided in a radial direction of the stator partition.

[0011] Furthermore, the outer diameter of the stator partition is larger than the outer diameters of the upper stator and the lower stator.

[0012] Furthermore, the shape of the cross section of the stator partition is the same as the cross section shape of the stator core of the upper stator, or the stator partition is an annular structure, or the stator partition is an annular structure, a plurality of protrusion structures are provided on the inner circumferential surface of the stator partition, a flow channel is provided on the lower rotor, and at least one of the plurality of protrusion structures is provided with a connecting channel connected to the flow channel.

[0013] Furthermore, the stator partition is an annular structure, and partition stator teeth are provided on the inner circumferential surface of the stator partition. The distance from the end of the partition stator tooth to the geometric center line of the axial direction of the shell is greater than the distance from the end of the upper stator tooth of the upper stator to the geometric center line.

[0014] Furthermore, the stator partition is made of non-magnetic material or magnetic material, wherein when the stator partition is made of magnetic material, the stator partition is formed by splicing multiple annular bodies and multiple teeth.

[0015] Furthermore, the upper end surface of the stator partition is provided with a first connecting column connected to the upper stator, and the lower end surface of the stator partition is provided with a second connecting column connected to the lower stator.

[0016] Furthermore, the stator partition is integrally formed and has a hollow structure, and the refrigeration oil of the motor can flow in the shell through the hollow structure.

[0017] Furthermore, the lower end surface of the lower stator is flush with the lower end surface of the lower rotor, the height of the upper end surface of the lower rotor along the axial direction of the motor is greater than the height of the upper end surface of the lower stator along the axial direction of the motor, and / or the height of the upper end surface of the upper rotor along the axial direction of the motor is greater than the height of the upper end surface of the upper stator along the axial direction of the motor.

[0018] Furthermore, the lower end surface of the lower rotor is located within the inner circumferential surface formed by the lower stator, and the height of the upper end surface of the upper rotor along the axial direction of the motor is greater than the height of the upper end surface of the upper stator along the axial direction of the motor.

[0019] Furthermore, a height between an upper end surface of the upper stator and a lower end surface of the lower stator is smaller than a height between an upper end surface of the upper rotor and a lower end surface of the lower rotor.

[0020] Furthermore, the balancing part includes a secondary balancing block and a main balancing block. The main balancing block is arranged between the upper rotor and the lower rotor, and the secondary balancing block is connected to the upper end surface of the upper rotor.

[0021] According to another aspect of the present invention, a compressor is provided, comprising a motor, which is the motor described above.

[0022] By applying the technical solution of the present invention, the rotor is configured as a split structure having an upper rotor and a lower rotor, and a balancing part is provided between the upper rotor and the lower rotor. This configuration can optimize the axial height of the overall rotor structure, effectively reduce the deflection of the crankshaft passing through the upper rotor and the lower rotor, thereby improving the reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of a first embodiment of a motor according to the present invention is shown;

[0025] Figure 2 A schematic structural diagram of a second embodiment of a motor according to the present invention is shown;

[0026] Figure 3 shows a schematic structural diagram of a third embodiment of a motor according to the present invention;

[0027] Figure 4 shows a schematic structural diagram of an embodiment of a lower rotor according to the present invention;

[0028] Figure 5 shows a schematic structural diagram of an embodiment of an upper rotor according to the present invention;

[0029] Figure 6 shows a schematic structural diagram of a fourth embodiment of a motor according to the present invention;

[0030] Figure 7 A schematic structural diagram of an embodiment of a stator separator according to the present invention is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Stator; 20. Upper rotor; 30. Lower rotor; 40. Auxiliary balance block; 50. Flow channel; 60. Housing; 70. Upper stator; 80. Lower stator; 90. Stator partition; 91. Annular body; 92. Tooth portion.

[0033] 100. Oil deflector cap; 101. Crankshaft; 102. Main balance block. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0038] Combine Figures 1 to 7 As shown, according to a specific embodiment of the present invention, a motor is provided.

[0039] Specifically, the motor includes a stator 10, an upper rotor 20, a lower rotor 30, and a balancing part. The upper rotor 20 is disposed in the stator 10. The lower rotor 30 is disposed in the stator 10, and the lower rotor 30 is disposed at a distance from the upper rotor 20. The balancing part is connected to the lower rotor 30, and the balancing part is located between the upper rotor 20 and the lower rotor 30. Figure 1As shown, the balancing portion includes a secondary balancing mass 40 , which is connected to the end surface of the lower rotor 30 facing the upper rotor 20 , and at least part of the secondary balancing mass 40 is arranged at a distance from the upper rotor 20 .

[0040] In this embodiment, the rotor is configured as a split structure having an upper rotor and a lower rotor, and a balancing portion is provided between the upper rotor and the lower rotor. This configuration can optimize the axial height of the overall rotor structure, effectively reduce the deflection of the crankshaft 101 passing through the upper rotor and the lower rotor, thereby improving the reliability of the motor.

[0041] In order to ensure reliability and reduce the impact of the motor ends on the motor efficiency, the motor segment height cannot be too small. Figure 6 and Figure 7 As shown, the motor also includes a housing 60, an upper stator 70, a lower stator 80 and a stator partition 90. The upper stator 70 is arranged in the housing 60, and the upper stator 70 is arranged in cooperation with the upper rotor 20. The lower stator 80 is arranged in the housing 60 and is located below the upper stator 70. The lower stator 80 is arranged in cooperation with the lower rotor 30. The stator partition 90 is arranged in the housing 60 and is located between the upper stator 70 and the lower stator 80. The height of the upper rotor 20 in the axial direction is H1, and the height of the lower rotor 30 in the axial direction is H2, wherein 0.57≤H1 / H2≤4.5. The distance from the upper end surface of the upper rotor 20 to the lower end surface of the lower rotor 30 is H, wherein the height of the stator partition 90 in the axial direction is H3, wherein H3≦0.3H. This arrangement can improve the reliability of the motor. Among them, as Figure 1 As shown, an oil deflector cap 100 is provided on the end surface of the upper rotor 20 .

[0042] like Figure 2 As shown, the upper rotor 20 and the lower rotor 30 are provided with a flow passage 50, which extends in the axial direction of the housing 60. The stator partition plate 90 is provided with a communication passage in the axial direction thereof, which communicates with the flow passage 50. This arrangement facilitates the circulation of the refrigerant oil.

[0043] like Figure 3 As shown, in another embodiment of the present application, the flow channel 50 is only provided on the lower rotor 30, and a communication channel is provided in the radial direction of the stator partition 90, which communicates with the flow channel 50. This arrangement enables the lower end surface of the upper rotor 20 to function as an oil baffle, eliminating the need for an oil baffle structure and further improving the reliability of the motor.

[0044] The outer diameter of the stator partition 90 is larger than that of the upper stator 70 and the lower stator 80. This configuration increases the interference fit between the stator partition 90 and the housing, increasing the stiffness of the entire stator and housing, reducing motor vibration and noise, and avoiding the stator stress iron loss problem that would be caused by directly increasing the interference fit of the stator core.

[0045] The cross-sectional shape of the stator partition 90 is the same as the cross-sectional shape of the stator core of the upper stator 70, or the stator partition 90 is an annular structure, or the stator partition 90 is an annular structure, and a plurality of protrusion structures are provided on the inner circumferential surface of the stator partition 90, and a flow channel 50 is provided on the lower rotor 30, and at least one of the plurality of protrusion structures is provided with a connecting channel connected to the flow channel 50.

[0046] The stator partition 90 is an annular structure, and partition stator teeth are provided on the inner circumference of the stator partition 90. The distance between the end of the partition stator teeth and the geometric centerline of the housing 60 in the axial direction is greater than the distance between the end of the upper stator teeth of the upper stator 70 and the geometric centerline. In other words, the teeth of the stator partition 90 are shorter than the teeth of the stator.

[0047] Specifically, when the stator partition plate 90 is punched into a circular ring structure using a magnetic conductive structure, it can be an integral type or a type such as Figure 7 When the stator partition 90 is designed with non-magnetic materials, it can be punched from thin sheets into the same core structure as the stator for lamination, or it can be punched into a structure without toothed boots or a ring structure with only a yoke. Alternatively, the blocks can be stacked into a ring structure of a certain height, with each block connected to the stator core on both sides via buckle points.

[0048] The stator partition 90 is made of a non-magnetic material or a magnetic material. When the stator partition 90 is made of a magnetic material, the stator partition 90 is formed by splicing a plurality of annular bodies 91 and a plurality of teeth 92 .

[0049] Furthermore, the upper end surface of the stator partition 90 is provided with a first connection post connected to the upper stator 70, and the lower end surface of the stator partition 90 is provided with a second connection post connected to the lower stator 80. This arrangement can improve the installation reliability of the stator.

[0050] The stator partition plate 90 may also be integrally formed, and the stator partition plate 90 may be a hollow structure, and the refrigeration oil of the motor may flow in the housing 60 through the hollow structure.

[0051] In the present application, the lower end surface of the lower stator 80 is flush with the lower end surface of the lower rotor 30, the upper end surface of the lower rotor 30 is greater in height along the axial direction of the motor than the upper end surface of the lower stator 80, and the upper end surface of the upper rotor 20 is greater in height along the axial direction of the motor than the upper end surface of the upper stator 70. Alternatively, the lower end surface of the lower rotor 30 is positioned within the inner circumferential surface formed by the lower stator 80, the upper end surface of the upper rotor 20 is greater in height along the axial direction of the motor than the upper end surface of the upper stator 70, and the height between the upper end surface of the upper stator 70 and the lower end surface of the lower stator 80 is less than the height between the upper end surface of the upper rotor 20 and the lower end surface of the lower rotor 30. The design of a height difference between the stator and rotor end surfaces is intended to balance the upward gas force exerted on the rotor by the internal airflow of the compressor during operation of a compressor having this motor structure, thereby improving the reliability of the compressor.

[0052] In another embodiment of the present application, the balancing unit includes a secondary balancing mass 40 and a primary balancing mass. The primary balancing mass is disposed between the upper rotor 20 and the lower rotor 30, and the secondary balancing mass 40 is connected to the upper end surface of the upper rotor 20. This arrangement can also reduce the deflection of the motor crankshaft.

[0053] The motor in the above embodiment can also be used in the technical field of compressor equipment. That is, according to another aspect of the present invention, a compressor is provided, comprising a motor, which is the motor in the above embodiment.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also falls within the scope of the present invention.

[0056] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A motor, characterized in that: include: stator (10); an upper rotor (20), the upper rotor (20) being disposed in the stator (10); a lower rotor (30), the lower rotor (30) being disposed in the stator (10), the lower rotor (30) being disposed at a distance from the upper rotor (20); a balancing portion connected to the lower rotor (30), the balancing portion being located between the upper rotor (20) and the lower rotor (30); The motor further comprises a lower stator (80) and an upper stator (70), the lower end surface of the lower stator (80) being flush with the lower end surface of the lower rotor (30), the height of the upper end surface of the lower rotor (30) along the axial direction of the motor being greater than the height of the upper end surface of the lower stator (80) along the axial direction of the motor, and / or the height of the upper end surface of the upper rotor (20) along the axial direction of the motor being greater than the height of the upper end surface of the upper stator (70) along the axial direction of the motor.

2. The motor according to claim 1, characterized in that The balancing portion includes a secondary balancing block (40), the secondary balancing block (40) being connected to the end surface of the lower rotor (30) facing the upper rotor (20), and at least a portion of the secondary balancing block (40) being arranged at a distance from the upper rotor (20).

3. The motor according to claim 1, characterized in that The height of the upper rotor (20) in the axial direction is H1, and the height of the lower rotor (30) in the axial direction is H2, wherein 0.57≤H1 / H2≤4.

5.

4. The motor according to claim 1, characterized in that The motor further comprises: Housing (60); The upper stator (70) is disposed in the housing (60), and the upper stator (70) is disposed in coordination with the upper rotor (20); The lower stator (80) is disposed in the housing (60) and is located below the upper stator (70), and the lower stator (80) is disposed in coordination with the lower rotor (30); A stator partition (90) is provided in the housing (60) and is located between the upper stator (70) and the lower stator (80).

5. The motor according to claim 4, characterized in that The distance from the upper end surface of the upper rotor (20) to the lower end surface of the lower rotor (30) is H, wherein the height of the stator partition (90) in the axial direction is H3, wherein H3≦0.3H.

6. The motor according to claim 4, characterized in that The upper rotor (20) and the lower rotor (30) are provided with flow passages (50), the flow passages (50) extending along the axial direction of the housing (60), and the stator partition (90) is provided with a communication passage in the axial direction thereof, the communication passage being in communication with the flow passages (50).

7. The motor according to claim 4, characterized in that The lower rotor (30) is provided with a flow passage (50), and the stator partition plate (90) is provided with a communication passage in radial direction that communicates with the flow passage (50).

8. The motor according to claim 4, characterized in that The outer diameter of the stator partition (90) is greater than the outer diameters of the upper stator (70) and the lower stator (80).

9. The motor according to claim 4, characterized in that The cross-sectional shape of the stator partition (90) is the same as the cross-sectional shape of the stator core of the upper stator (70), or, The stator partition (90) is an annular structure, or The stator partition (90) is an annular structure, and a plurality of protrusion structures are provided on the inner circumference of the stator partition (90). A flow passage (50) is provided on the lower rotor (30), and at least one of the plurality of protrusion structures is provided with a communication passage connected to the flow passage (50).

10. The motor according to claim 4, characterized in that The stator partition (90) is an annular structure, and partition stator teeth are provided on the inner circumferential surface of the stator partition (90), and the distance between the end of the partition stator tooth and the geometric center line in the axial direction of the housing (60) is greater than the distance between the end of the upper stator tooth of the upper stator (70) and the geometric center line.

11. The motor according to claim 9 or 10, characterized in that The stator partition (90) is made of a non-magnetic material or a magnetic material, wherein when the stator partition (90) is made of the magnetic material, the stator partition (90) is formed by splicing a plurality of annular bodies (91) and a plurality of teeth (92).

12. The motor according to claim 4, characterized in that The upper end surface of the stator partition (90) is provided with a first connecting column connected to the upper stator (70), and the lower end surface of the stator partition (90) is provided with a second connecting column connected to the lower stator (80).

13. The motor according to claim 4, characterized in that The stator partition (90) is integrally formed and has a hollow structure, and the refrigeration oil of the motor can flow into the housing (60) through the hollow structure.

14. The motor according to claim 4, characterized in that The lower end surface of the lower rotor (30) is located within the inner circumferential surface formed by the lower stator (80), and the height of the upper end surface of the upper rotor (20) along the axial direction of the motor is greater than the height of the upper end surface of the upper stator (70) along the axial direction of the motor.

15. The motor according to claim 4, characterized in that The height between the upper end surface of the upper stator (70) and the lower end surface of the lower stator (80) is smaller than the height between the upper end surface of the upper rotor (20) and the lower end surface of the lower rotor (30).

16. The motor according to claim 1, characterized in that The balancing part comprises a secondary balancing block (40) and a main balancing block, wherein the main balancing block is arranged between the upper rotor (20) and the lower rotor (30), and the secondary balancing block (40) is connected to the upper end surface of the upper rotor (20).

17. A compressor comprising a motor, characterized in that: The motor is the motor according to any one of claims 1 to 16.

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