Stator and rotor structure for scroll compressor motor

Abstract

The utility model discloses a stator and rotor structure for a scroll compressor motor, and relates to the technical field of scroll compressor processing, in particular to a motor structure for a scroll compressor. According to the utility model, the wave-shaped welding bead is arranged on the linear segment of the stator punching sheet and is used for welding after the stator punching sheet is laminated; the number of the rotor slots of the rotor punching sheet is 38. Rivet buckles B which are used for connection after the rotor punching sheets are stacked are uniformly distributed on the annular part between the shaft hole of the rotor punching sheet and the rotor groove. The laminated thickness of the stator punching sheets ranges from 80 mm to 200 mm. And the laminated thickness of the rotor punching sheets ranges from 78 mm to 200 mm. The technical scheme of the utility model solves the problems that the stator punching sheet in the prior art is close to the center hole of the arc segment, the magnetic density of the stator yoke is increased, and the motor efficiency is reduced; and the rotor slot area of the rotor punching sheet is relatively small, so that the rotor resistance is relatively high, the aluminum consumption of the rotor is relatively large, and the motor efficiency is reduced.

Description

Technical Field

[0001] The utility model discloses a stator and rotor structure for a scroll compressor motor, relates to the technical field of scroll compressor processing, and in particular to a motor structure for a scroll compressor. Background Art

[0002] The motor is the core driving component of the scroll compressor. The motor consists of a motor stator and a motor rotor. The design dimensions of the motor stator and rotor directly affect the motor efficiency and speed, thereby affecting the performance of the compressor. Therefore, the optimized design of the motor stator and rotor is crucial to improving the performance of the compressor.

[0003] The center of the motor punching used in the 8HP~20HP scroll compressor is provided with a stator inner hole for installing the rotor punching. The stator outer diameter is 190mm±0.03, and the inner diameter is 87mm±0.2. The circular stator sheet body has 30 pear-shaped stator slots with the same structure evenly distributed outward on the stator inner hole. The part between the stator slots is the stator tooth, and the width of the stator tooth is 4.8mm±0.02. The outer contour of the stator punching includes four straight line segments and four arc segments. The four straight line segments and the four arc segments are spaced from each other and connected end to end in sequence, and the four arc segments have the same center of the circle. The four arc segments are provided with wavy line-shaped welds for stacking the stator punchings. Four center holes with a diameter of 8.6 are provided near the stator punchings near the arc segments for connecting with the compressor support through bolts. Due to the presence of these four center holes, the magnetic flux density of the stator yoke increases, reducing the efficiency of the motor. The rotor punching includes a rotor body with a diameter of 85.88mm±0.04. The center of the rotor body is provided with an axial hole for placing the rotating shaft. 34 rotor slots with the same structure are evenly distributed on the axial hole. The radial inner and outer sides of the rotor slots are both arc-shaped edges, and the bottom of the rotor slot is a flat-bottomed slot structure. The part between the rotor slots is the rotor tooth, and the width of the rotor tooth is 3.4mm±0.02. The rotor slot area is small, the rotor resistance is high, resulting in a large rotor aluminum loss, which reduces the efficiency of the motor.

[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new stator and rotor structure for a scroll compressor motor to overcome the problems existing in the prior art. Summary of the invention

[0005] According to the above-mentioned prior art, the stator punching sheet is close to the center hole of the arc segment, which increases the magnetic density of the stator yoke and reduces the motor efficiency; the rotor slot area of ​​the rotor punching sheet is small, resulting in high rotor resistance, large rotor aluminum loss, and reduced motor efficiency. A stator and rotor structure for a scroll compressor motor is provided. The utility model mainly uses a weld or a rivet to replace the original center hole for connection, thereby improving the motor efficiency.

[0006] The technical means adopted by the utility model are as follows:

[0007] A stator and rotor structure for a scroll compressor motor, comprising a plurality of stacked stator punchings and a plurality of stacked rotor punchings; the outer contour of the stator punchings is formed by four straight line segments of equal length and four arc segments of equal arc and length, which are spaced from each other and connected end to end in sequence; 30 stator slots separated by stator teeth are evenly distributed on the stator punchings; the rotor punchings are arranged in the stator inner holes of the stator punchings; the rotor punchings are provided with rotor slots separated by rotor teeth; the characteristics are:

[0008] Furthermore, a wavy weld is provided on the straight section of the stator punching sheet, which is used for welding after the stator punching sheets are stacked;

[0009] Furthermore, the number of rotor slots of the rotor punching is 38.

[0010] Furthermore, four arc segments of the stator punching sheets are provided toward the inner hole of the stator with rivets A for connecting the stator punching sheets after stacking.

[0011] Furthermore, the number of the rivet buckles A is one of 8 or 12.

[0012] Furthermore, rivet buckles B used for connecting the rotor punches after stacking are evenly distributed on the annular portion between the shaft hole of the rotor punching and the rotor slot.

[0013] Furthermore, the number of rivet buckles B is 5-6.

[0014] Furthermore, the stacked thickness of the stator sheets is in the range of 80-200 mm.

[0015] Furthermore, the rotor lamination stack has a thickness ranging from 78 to 200 mm.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The stator and rotor structure for the scroll compressor motor provided by the utility model cancels the four 8.6 center holes set on the stator punching sheet near the arc section, and changes the assembly method of the motor and the housing to hot installation. Since the four center holes are cancelled, the magnetic density of the stator yoke is reduced, and the motor efficiency is improved by 0.3%.

[0018] 2. The stator and rotor structure for the scroll compressor motor provided by the utility model re-optimizes the design of the rotor slots, reduces the rotor resistance, reduces the rotor aluminum loss, and further improves the motor efficiency by 0.3%.

[0019] 3. The stator and rotor structure for the scroll compressor motor provided by the utility model can be widely promoted in the technical field of scroll compressor motors.

[0020] In summary, the technical solution of the utility model solves the problems in the prior art that the center hole of the stator punching sheet is close to the arc segment, the magnetic density of the stator yoke is increased, and the efficiency of the motor is reduced; the rotor slot area of ​​the rotor punching sheet is small, resulting in high rotor resistance, large rotor aluminum loss, and reduced motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of a stator punching sheet provided with a weld bead according to the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of a stator punching sheet provided with a rivet buckle A according to the utility model;

[0025] Figure 4 This is a schematic diagram of the rotor punching structure provided with rivet buckles B according to the utility model;

[0026] Figure 5 It is a schematic diagram of the structure of existing stator punching sheets and rotor punching sheets.

[0027] In the figure: 1, stator punching sheet; 11, straight line segment; 12, arc segment; 13, rivet A; 14, weld; 2, stator slot; 3, stator tooth; 4, notch; 5, rotor punching sheet; 51, rivet B; 6, shaft hole; 7, rotor slot; 8, rotor tooth. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention 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.

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] 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 utility model. 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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 their position 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.

[0034] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0035] Example 1

[0036] like Figure 1 , 2 As shown, the utility model provides a stator and rotor structure for a scroll compressor motor, comprising a stator punching sheet 1 and a rotor punching sheet 5; a stator inner hole for installing the rotor punching sheet 5 is opened at the center of the stator punching sheet 1, the stator punching sheet 1 is a circular stator sheet body with an outer diameter of 190 mm ± 0.03 and an inner diameter of 87 mm ± 0.2, 30 stator slots 2 with the same structure are evenly distributed outward on the stator inner hole, the stator slots 2 are pear-shaped slots, a stator slot opening 4 is provided between the stator slots 2 and the stator inner hole, the part between the stator slots 2 is a stator tooth 3, and the width of the stator tooth 3 is 4.8 mm ± 0.02.

[0037] The outer contour of the stator punching sheet 1 includes four straight line segments 11 and four arc line segments 12, which are spaced from each other and connected end to end in sequence, the lengths of the four straight line segments 11 are equal, the lengths of the four arc line segments 12 are equal, and the four arc line segments 12 have the same center. The four straight line segments 11 are provided with a wavy line weld bead 14 for stacking the stator punching sheet 1. One of the four straight line segments 11 is provided with an arc mark with a radius of 2.

[0038] The rotor punching 5 is a rotor sheet body with a diameter of 85.88mm±0.04. The center of the rotor sheet body is provided with an axial hole 6 for placing the rotating shaft. 38 rotor slots 7 with the same structure are evenly distributed outward from the axial hole 6. The radial inner and outer sides of the rotor slots 7 are both arc-shaped edges, and the bottom of the rotor slots 7 is a flat bottom slot structure. The part between the rotor slots 7 is a rotor tooth 8, and the width of the rotor tooth 8 is 2.9mm±0.02.

[0039] The diameter of the shaft hole 6 is in the range of 30-40 mm.

[0040] The stacked thickness of the stator laminations 1 ranges from 80 to 200 mm.

[0041] The stacked thickness of the rotor laminations 5 ranges from 78 to 200 mm.

[0042] Example 2

[0043] like Figure 3 , 4 As shown, (on the basis of Example 1,) the utility model also provides a stator and rotor structure for a scroll compressor motor; the four arc segments 12 of the stator punching sheet 1 are provided with rivets 13 toward the center hole to enable the stator punching sheet 1 to be stacked, and the number of the rivets 13 is 8 or 12; the annular part between the axial hole 6 of the rotor punching sheet 5 and the rotor slot 7 is provided with 5-6 evenly distributed rivets.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A stator and rotor structure for a scroll compressor motor, comprising a plurality of stacked stator sheets (1) and a plurality of stacked rotor sheets (5); the outer contour of the stator sheet (1) is formed by four straight line segments (11) of equal length and four arc segments (12) of equal arc and length, which are spaced from each other and connected end to end in sequence; 30 stator slots (2) spaced by stator teeth (3) are evenly distributed on the stator sheet (1); the rotor sheet (5) is arranged in the stator inner hole of the stator sheet (1); the rotor sheet (5) is provided with rotor slots (7) spaced by rotor teeth (8); the characteristics are: A wavy weld bead is provided on the straight section of the stator punching sheet (1) for use in welding the stator punching sheets (1) after stacking; The number of rotor slots (7) of the rotor punching sheet (5) is 38.

2. The stator and rotor structure for a scroll compressor motor according to claim 1, characterized in that: The four arc segments (12) of the stator punching sheet (1) are arranged towards the inner hole of the stator and are provided with rivet buckles A (13) used for connecting the stator punching sheets (1) after stacking.

3. The stator and rotor structure for a scroll compressor motor according to claim 2, characterized in that: The number of the rivet buckles A (13) is one of 8 or 12.

4. The stator and rotor structure for a scroll compressor motor according to claim 1, characterized in that: Rivet buckles B (51) for connecting the rotor punching sheets (5) after stacking are evenly distributed on the annular portion between the shaft hole (6) and the rotor slot (7) of the rotor punching sheet (5).

5. The stator and rotor structure for a scroll compressor motor according to claim 4, characterized in that: The number of the rivet buckles B (51) is 5-6.

6. The stator and rotor structure for a scroll compressor motor according to claim 1, characterized in that: The stacked thickness of the stator punching sheets (1) is in the range of 80-200 mm.

7. The stator and rotor structure for a scroll compressor motor according to claim 1, characterized in that: The stacked thickness of the rotor punching sheets (5) is in the range of 78-200 mm.

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