Slotted rotor core and scroll compressor

Abstract

The utility model provides a slotted rotor iron core and a scroll compressor, the slotted rotor iron core comprises an iron core body, the iron core body is provided with a slot part, and the slot part comprises a plurality of mounting slot groups and a plurality of magnet slots; on a horizontal projection, the plurality of magnet grooves are sequentially arranged at the edge of the iron core body at intervals along the circumferential direction of the iron core body, the plurality of mounting groove groups are arranged in one-to-one correspondence with the plurality of magnet grooves, and the mounting groove groups are arranged on the outer sides of the magnet grooves in the radial direction of the iron core body. The slotted rotor iron core can effectively reduce high-order radial force, and can reduce the density of high-order harmonic waves and optimize the harmonic waves of electromagnetic force through the mutual cooperation of the plurality of mounting groove groups and the plurality of magnet grooves; the installation groove group can reduce the cogging torque of the motor and enable the waveform of the motor to be close to a sine type in a wireless mode, the front cogging torque is improved, and vibration generated by the motor and high-order electromagnetic noise can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scroll compressors, in particular to a slotted rotor core and a scroll compressor. BACKGROUND

[0002] At present, the driving motor of the scroll compressor generally adopts a permanent magnet synchronous motor. The permanent magnet synchronous motor has the characteristics of small size, large output torque, high motor efficiency, accurate speed control, etc. However, with the gradual increase of industry development and market competition, the manufacturers of air conditioning systems also improve the requirements for the single speed of the compressor from 130 rps to 160 rps or even higher. The faster speed of the compressor will cause the motor to run at high speed.

[0003] However, the existing permanent magnet synchronous motor will generate high-order radial force when running at high speed, which will cause the motor to generate a large amount of electromagnetic noise when running at high speed. In addition, with the continuous increase of the displacement of the scroll compressor and the weight of the orbiting scroll, the motor speed and its maximum output torque are also increasing, which further increases the high-order noise generated by the motor when running at high speed.

[0004] Therefore, it is necessary to design a slotted rotor core to reduce high-order noise. CONTENT OF THE INVENTION

[0005] Therefore, in order to overcome the defects of the prior art, the present application provides a slotted rotor core and a scroll compressor, which effectively solves the problem of high-order noise generated by the existing permanent magnet synchronous motor when running at high speed.

[0006] According to the first aspect of the present application, a slotted rotor core is provided, wherein the core body is provided with a slot part, and the slot part comprises a plurality of installation slot groups and a plurality of magnet slots; in the horizontal projection, a plurality of magnet slots are sequentially and spacedly arranged at the edge of the core body along the circumferential direction of the core body, a plurality of installation slot groups are arranged one by one corresponding to a plurality of magnet slots, and in the radial direction of the core body, the installation slot group is arranged on the outer side of the magnet slot.

[0007] Preferably, the installation slot group comprises a first installation slot, a second installation slot, a third installation slot and an intermediate installation slot arranged at intervals, and the first installation slot, the second installation slot and the third installation slot are arranged on both sides of the intermediate installation slot.

[0008] Preferably, in the radial direction of the core body, the outermost side of the intermediate installation slot is close to the edge of the core body, and the outermost sides of the first installation slot, the second installation slot and the third installation slot are away from the outermost side of the intermediate installation slot and close to the magnet slot.

[0009] Preferably, the first installation slot is away from the intermediate installation slot along the circumference of the core body; the first installation slot is formed as a trapezoidal slot, and the second installation slot, the third installation slot and the intermediate installation slot are formed as rectangular slots.

[0010] Preferably, the distance between the second installation slot and the third installation slot is 0.2mm-0.5mm, and / or the distance between the second installation slot and the intermediate installation slot is less than 20mm, and / or the distance between the first installation slot and the intermediate installation slot is less than 30mm.

[0011] Preferably, the length of the second installation slot and the third installation slot in the first direction is greater than 2mm, and / or the length of the second installation slot and the third installation slot in the second direction is greater than 1mm.

[0012] Preferably, the slot part further comprises a plurality of auxiliary slot groups, and each two adjacent magnet slots are provided with the auxiliary slot group.

[0013] Preferably, the magnet slot is formed as a rectangular structure, and the rectangular structure is provided with a magnetic combing part near both ends of the auxiliary slot group.

[0014] Preferably, the auxiliary slot group comprises a first auxiliary slot and a second auxiliary slot, the first auxiliary slot is formed as a rectangular slot, the second auxiliary slot is formed as a trapezoidal slot, and the second auxiliary slot is close to the end of the magnet slot.

[0015] According to the second aspect of the utility model, a scroll compressor is provided, wherein the scroll compressor comprises the slotted rotor core as described above.

[0016] According to the slotted rotor core of the utility model, by providing the slot part on the core body, the high-order radial force can be effectively reduced, by the mutual cooperation of the plurality of installation slot groups and the plurality of magnet slots, the density of high-order harmonics can be reduced, and the harmonics of electromagnetic force are optimized. The installation slot group can reduce the cogging torque of the motor and make its waveform tend to be sinusoidal, improve the effect of front cogging torque, and effectively reduce the vibration and high-order electromagnetic noise generated by the motor during operation.

[0017] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described, and the accompanying drawings are shown as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 A front view of a slotted rotor core according to an embodiment of the present application is shown.

[0020] Figure 2 A partial structure schematic view of a slotted rotor core according to an embodiment of the present application is shown. Figure 1

[0021] Figure 3 A partial structure schematic view of a slotted rotor core according to an embodiment of the present application is shown. Figure 2

[0022] Reference signs: 1 - core body; 201 - first installation slot; 202 - second installation slot; 203 - third installation slot; 204 - intermediate installation slot; 3 - magnet slot; 301 - magnetic combing part; 401 - first auxiliary slot; 402 - second auxiliary slot; 5 - installation hole; 6 - circular outer edge; a - first distance; b - second distance; c - third distance; d - fourth distance; e - fifth distance. DETAILED DESCRIPTION

[0023] The following detailed description is provided to help the reader obtain a complete understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent after an understanding of the disclosure of the present application. For example, the order of the operations described herein is merely an example, and is not limited to the order set forth herein, but, except for operations that must occur in a specific order, changes that will be apparent after an understanding of the disclosure of the present application can be made. In addition, the description of features known in the art can be omitted in order to improve clarity and conciseness.

[0024] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to show some of the many ways in which the methods, devices, and / or systems described herein can be implemented after an understanding of the disclosure of the present application.

[0025] ​​Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element, or terms similar thereto, it is understood that an intervening element may be present or absent. For example, if a layer is described as being "on" a substrate, it is understood that an intervening layer may be present or absent. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to," "directly adjacent to," "directly on top of," or terms similar thereto, it is understood that no intervening element is present.

[0026] As used herein, the term "and / or" includes any one of the listed items and any combination of two or more of the listed items.

[0027] Although terms such as "first" and "second" and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as a first component, assembly, region, layer or section in one example described herein can also be referred to as a second component, assembly, region, layer or section in another example without departing from the teachings of the examples.

[0028] For ease of description, spatial terms such as "on," "upper," "below," and "lower" can be used with respect to the orientation of one element with respect to another element as illustrated in the figures. Such spatial terms can be intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, a component described as being "on" or "upper" relative to another component would then be oriented "below" or "lower" relative to the other component. Accordingly, the term "on" encompasses both an "on" and "under" orientation depending on the spatial orientation of the device. The device can be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and an appropriate modification to the spatial terms would be made to those of skill in the art in light of the drawings.

[0029] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of examples. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "has," "having," and the like are inclusive of the stated features, numbers, operations, members, elements, and / or the like, but do not exclude the presence or addition of one or more other features, numbers, operations, members, elements, and / or the like.

[0030] Variations in the shapes illustrated in the drawings can occur as a result of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the specific shapes illustrated in the drawings, but include variations in shapes that occur during manufacturing.

[0031] Features of the examples described herein can be combined with one another in any manner, in accordance with various aspects of the disclosure. Moreover, although examples described herein have a variety of configurations, other configurations are possible in accordance with aspects of the disclosure.

[0032] According to a first aspect of the present application, a slotted rotor core is provided, as shown in Figures 1 to 3 The slotted rotor core is used in a motor of a scroll compressor, for example, a permanent magnet synchronous motor, and includes a core body 1. In the following description, reference will be made to Figures 1 to 3 The detailed structure of the core body 1 of the slotted rotor core will be specifically described.

[0033] As shown in Figure 1 In an embodiment, the core body 1 can be formed in a disc-shaped structure, and a through hole is formed in the middle of the disc-shaped structure for assembling a plurality of the slotted rotor cores to form a rotor. The core body 1 can be provided with a slot portion, which can include a plurality of through slots that can be used for mounting permanent magnets and assisting in reducing high-order electromagnetic noise generated by the motor during high-speed and high-output operation.

[0034] Specifically, the slot portion can include a plurality of mounting slot groups and a plurality of magnet grooves 3. In a horizontal projection (for example, as shown in the front view Figure 1 In a horizontal projection (for example, as shown in the front view

[0035] Furthermore, multiple mounting slots are arranged in a one-to-one correspondence with multiple magnet slots 3. This one-to-one correspondence can be understood as a one-to-one correspondence in shape and size; for example, a corresponding mounting slot is provided on the side of each magnet slot 3. In the radial direction of the iron core body 1, the mounting slots are located on the outer side of the magnet slots 3, that is, each mounting slot is located between the corresponding magnet slot 3 and the outer edge of the iron core body 1, which is the circular outer edge 6. The mounting slots can reduce the cogging torque of the motor and make its waveform infinitely closer to a sine wave, thus improving the front cogging torque. Reducing the cogging torque and making the motor waveform infinitely closer to a sine wave can effectively improve the vibration and high-order electromagnetic noise generated by the motor during operation.

[0036] The slotted rotor core effectively reduces high-order radial forces by creating slots on the core body 1. Through the interaction of multiple mounting slots and multiple magnet slots 3, it reduces the density of high-order harmonics and optimizes electromagnetic force harmonics. The mounting slots reduce the motor's cogging torque and make its waveform more sinusoidal, improving the front cogging torque and effectively reducing vibration and high-order electromagnetic noise generated during motor operation.

[0037] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the mounting slot group may include a first mounting slot 201, a second mounting slot 202, a third mounting slot 203, and a middle mounting slot 204 arranged sequentially at intervals. The middle mounting slot 204 has one first mounting slot 201, one second mounting slot 202, and one third mounting slot 203 on each side. That is, each mounting slot group may include two first mounting slots 201, two second mounting slots 202, and two third mounting slots 203, and the mounting slot group is formed into a symmetrical structure, which can effectively reduce higher-order radial electromagnetic forces when the motor is running.

[0038] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the intermediate mounting slot 204 is positioned close to the edge of the core body 1, that is, radially in the core body 1. The outermost position of the intermediate mounting slot 204 is close to the edge of the core body 1, specifically close to the outer circular edge 6. The outermost positions of the first mounting slot 201, the second mounting slot 202, and the third mounting slot 203 are far from the outermost position of the intermediate mounting slot 204 and close to the magnet groove 3. The positions of the first mounting slot 201, the second mounting slot 202, and the third mounting slot 203 are close to the magnet groove 3. Since the edge of the core body 1 is formed as a circular outer edge 6, in order to effectively distribute the multiple mounting slots in the mounting slot group and effectively reduce the higher-order radial electromagnetic force when the core body 1 rotates, the intermediate mounting slot 204, located in the middle, needs to be closer to the circular outer edge 6 than the other mounting slots, so that the multiple mounting slots in the mounting slot group are evenly distributed.

[0039] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the first mounting groove 201 is located circumferentially away from the intermediate mounting groove 204 along the core body 1. The first mounting groove 201 is formed as a trapezoidal groove, while the second mounting groove 202, the third mounting groove 203, and the intermediate mounting groove 204 are all formed as rectangular grooves. Since the edge of the core body 1 is formed as a circular outer edge 6, the first mounting groove 201, which is closer to the circular outer edge 6 than the other mounting grooves, needs to avoid this circular outer edge 6, thus forming a trapezoidal groove. The fact that the second mounting groove 202, the third mounting groove 203, and the intermediate mounting groove 204 are all formed as rectangular grooves can effectively reduce the higher-order radial electromagnetic force at these locations, thereby reducing the noise generated during operation.

[0040] Preferably, such as Figure 3 As shown, in this embodiment, the distance between the second mounting groove 202 and the third mounting groove 203 is 0.2mm-0.5mm. This distance can be understood as... Figure 3 The first distance 'a' is between 0.2mm and 0.5mm. The distance between the second mounting slot 202 and the intermediate mounting slot 204 is less than 20mm. This distance can be understood as... Figure 3 The third distance c in the figure refers to the distance between the first mounting slot 201 and the intermediate mounting slot 204 being less than 30mm. This distance can be understood as being within... Figure 3 The fourth distance d in the middle. In order to ensure that the mounting slot group can have a better opening effect, the distance between the first mounting slot 201, the second mounting slot 202 and the third mounting slot 203 and the middle mounting slot 204 needs to meet the above requirements.

[0041] Preferably, such as Figure 3 As shown, in this embodiment, the shape and size of the second mounting groove 202 and the third mounting groove 203 can be the same. The lengths of the second mounting groove 202 and the third mounting groove 203 in a first direction are greater than 2 mm. This first direction can be, for example, in... Figure 3 The direction from bottom to top in the middle, that is Figure 3 The second distance b in the middle, the length of the second distance b is greater than 2mm. The length of the second mounting groove 202 and the third mounting groove 203 in the second direction is greater than 1mm, where the second direction can be, for example, in the middle. Figure 3 The direction from left to right in the middle, that is Figure 1 to 3 The fifth distance e in the equation has a length greater than 1 mm. Thus, the second mounting slot 202 and the third mounting slot 203, which are opened according to the dimensional requirements described above, can effectively reduce the higher-order radial electromagnetic force, thereby reducing the noise generated by the motor at high speeds.

[0042] Preferably, such asFigure 1 to 3 As shown in the embodiments, the groove portion can further include a plurality of auxiliary groove groups, and one auxiliary groove group is arranged between every two adjacent magnet grooves 3. The auxiliary groove group can further reduce the high-order radial electromagnetic force, thereby reducing the high-order electromagnetic noise generated by the motor during high-speed and high-power operation.

[0043] Preferably, as Figure 1 to 3 As shown in the embodiments, the auxiliary groove group can include a first auxiliary groove 401 and a second auxiliary groove 402, the first auxiliary groove 401 can be formed as a rectangular groove, and the second auxiliary groove 402 can be formed as a trapezoidal groove, and the second auxiliary groove 402 is close to the end of the magnet groove 3. In the embodiments, each auxiliary groove group can include two first auxiliary grooves 401 and two second auxiliary grooves 402, and the two first auxiliary grooves 401 and the two second auxiliary grooves 402 are symmetrically arranged with respect to each other, so that one second auxiliary groove 402 is arranged at the end of each magnet groove 3. In order to further reduce the high-order radial electromagnetic force, the auxiliary groove group can include a plurality of auxiliary grooves, and in order to avoid the end of the magnet groove 3, the second auxiliary groove 402 needs to be formed as a trapezoidal groove.

[0044] Preferably, as Figure 1 to 3 As shown in the embodiments, the magnet groove 3 can be formed as a rectangular structure, and the rectangular structure is provided with a magnetic grooming portion 301 at both ends of the auxiliary groove group. Since the magnet groove 3 is internally provided with a permanent magnet, in order to enable the permanent magnet to be formed as a rotor magnetic pole, the magnetic grooming portion 301 needs to be provided, and the magnetic grooming is a very important process, which has a direct impact on the overall performance of the motor or other devices using permanent magnets. This process mainly includes accurate control of the magnetic field distribution around the permanent magnet, thereby optimizing the output performance of the motor. Users can use finite element analysis and other tools to perform simulation calculations as needed to predict and optimize the design of the permanent magnet installation groove, thereby achieving the above-mentioned goals. In addition, appropriate permanent magnet materials can be selected, the shape of the magnet can be optimized, the core material and structure can be considered, and other measures can be taken to significantly improve the performance of the permanent magnet motor or other related devices. In the embodiments, the magnetic grooming portion 301 can be formed as an arc-shaped protrusion, and the arc-shaped protrusion is arranged at both ends of the magnet groove 3 in the length direction.

[0045] Preferably, as ​ As shown in the embodiments, the core body 1 can further be provided with a mounting hole 5, and the number of the mounting hole 5 can be six. The six mounting holes 5 are arranged at the core body 1 at intervals. One core body 1 can be assembled with the remaining core bodies 1 through the six mounting holes 5, thereby forming a rotor. The assembly method can be, for example, the use of connecting bolts.

[0046] The slotted rotor core can effectively reduce high-order radial force by the slot part on the core body, can reduce the density of high-order harmonics by the mutual cooperation of the plurality of installation slot groups and the plurality of magnet slots, and optimize the harmonics of electromagnetic force. The installation slot group can reduce the tooth slot torque of the motor and make the waveform thereof close to the sine type, improve the effect of the front tooth slot torque, and effectively reduce the vibration and high-order electromagnetic noise generated by the motor during operation.

[0047] In addition, according to the second aspect of the utility model, a scroll compressor is provided, the scroll compressor comprises the slotted rotor core as described above. The scroll compressor can effectively improve the vibration and high-order electromagnetic noise generated by the motor during operation by using the motor comprising the slotted rotor core as described above, and improve the user experience.

[0048] Finally, it should be noted that: the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, the protection scope of the present application is not limited to this, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: any person skilled in the art in the technical range disclosed by the present application, it can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and all should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope of the claims.

Claims

1. A slotted rotor core characterized by, The iron core body is provided with a slot part including a plurality of installation slot groups and a plurality of magnet slots. In the horizontal projection, the plurality of magnet slots are sequentially and spacedly arranged at the edge of the iron core body in the circumferential direction of the iron core body, and the plurality of installation slot groups are arranged corresponding to the plurality of magnet slots, and in the radial direction of the iron core body, the installation slot groups are arranged outside the magnet slots.

2. The slotted rotor core according to claim 1, characterized by The installation slot groups include a first installation slot, a second installation slot, a third installation slot and an intermediate installation slot arranged at intervals, and the first installation slot, the second installation slot and the third installation slot are arranged on both sides of the intermediate installation slot.

3. The slotted rotor core according to claim 2, characterized by In the radial direction of the iron core body, the outermost side of the intermediate installation slot is close to the edge of the iron core body, and the outermost sides of the first installation slot, the second installation slot and the third installation slot are away from the outermost side of the intermediate installation slot and close to the magnet slots.

4. The slotted rotor core according to claim 2, characterized by The first installation slot is away from the intermediate installation slot in the circumferential direction of the iron core body. The first installation slot is formed as a trapezoidal slot, and the second installation slot, the third installation slot and the intermediate installation slot are formed as rectangular slots.

5. The slotted rotor core according to claim 2, characterized by The distance between the second installation slot and the third installation slot is 0.2-0.5mm, and / or the distance between the second installation slot and the intermediate installation slot is less than 20mm, and / or the distance between the first installation slot and the intermediate installation slot is less than 30mm.

6. The slotted rotor core according to claim 2, characterized by The length of the second installation slot and the third installation slot in the first direction is greater than 2mm, and / or the length of the second installation slot and the third installation slot in the second direction is greater than 1mm.

7. The slotted rotor core of claim 1, characterized by The slot part further includes a plurality of auxiliary slot groups arranged between every two adjacent magnet slots.

8. The slotted rotor core according to claim 7, characterized in that The magnet slot is formed as a rectangular structure, and the rectangular structure is provided with a magnetic combing part close to both ends of the auxiliary slot group.

9. The slotted rotor core of claim 7, characterized by The auxiliary slot group includes a first auxiliary slot and a second auxiliary slot, the first auxiliary slot is formed as a rectangular slot, and the second auxiliary slot is formed as a trapezoidal slot, and the second auxiliary slot is close to the end of the magnet slot.

10. A scroll compressor characterized by, The scroll compressor includes the slotted rotor iron core according to any one of claims 1-9.

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