Rotor punching sheet of single-phase motor applied to scroll compressor

Abstract

The utility model discloses a rotor punching sheet applied to a single-phase motor of a scroll compressor, which comprises a punching sheet body, a plurality of rotor slots are uniformly arranged on the edge of the punching sheet body, tooth parts are formed between adjacent rotor slots, the width of each tooth part is H, the number of the rotor slots is K, the outer diameter of the rotor punching sheet is D, and the width of each tooth part is H; the number and the area of each rotor slot are adjusted, the area of each single rotor slot is S, the ratio of the tooth width to the outer diameter of the rotor is P1, P1 is equal to HK / D, the ratio of the slot area to the outer diameter of the rotor is P2, P2 is equal to SK / 10 * D, P1 is equal to 1.43 + / -0.2, P2 is equal to 1.06 + / -0.15, and the efficiency of the motor is the highest. By adjusting the number and the area of the rotor slots and the width of the teeth, the ratio of the tooth width to the outer diameter of the rotor is 1.43 + / -0.2, and the ratio of the slot area to the outer diameter of the rotor is 1.06 + / -0.15; the tooth width is increased, the magnetic potential consumed by the tooth part is reduced, and the induction resistance and loss of the rotor are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor punching sheets, in particular to a rotor punching sheet used for a single-phase motor of a scroll compressor. Background Art

[0002] The motor used in a scroll compressor provides power to the compressor and converts electrical energy into mechanical energy for the compressor. The motor consists of two parts: a stator and a rotor. The stator core is made of laminated silicon steel sheets, with coils embedded in the slots to generate a rotating magnetic field. The rotor core is also made of laminated silicon steel sheets, with cast aluminum material in the slots to form a squirrel cage that generates torque under the rotating magnetic field to drive the compressor mechanism to rotate. The slot size of the motor punching, the distribution of the slots, the inner and outer circle sizes, and the cooling channels inside the compressor will all affect the performance of the motor. The existing motor punching slot area is small, resulting in high copper and aluminum losses, which is not conducive to reducing heat, resulting in low motor efficiency, affecting the overall performance of the compressor, and failing to meet the requirements of high efficiency and energy saving. Utility Model Content

[0003] The purpose of the utility model is to provide a rotor punching for a single-phase motor used in a scroll compressor. By setting the number and area of the rotor slots and the width of the teeth, the ratio of the tooth width to the rotor outer diameter is made 1.43±0.2, and the ratio of the slot area to the rotor outer diameter is made 1.06±0.15. The tooth width is increased, the magnetic potential consumed in the tooth portion is reduced, the performance is improved, the cross-sectional area of the rotor is guaranteed, the rotor induction resistance and loss are reduced, and the efficiency is improved.

[0004] The utility model provides the following technical solution: a rotor punching for a single-phase motor used in a scroll compressor, comprising a punching body, an axial hole being formed in the center of the punching body, a plurality of rotor slots being evenly formed on the edge of the punching body, teeth being formed between adjacent rotor slots, the width of the teeth being H, the number of the rotor slots being K, the outer diameter of the rotor punching being D, and the area of a single rotor slot being S;

[0005] The ratio of the tooth width to the rotor outer diameter is P1, P1=HK / D;

[0006] The ratio of the slot area to the rotor outer diameter is P2, P2=SK / 10*D;

[0007] The P1=1.43±0.2, P2=1.06±0.15, D=69mm±2, and the motor efficiency is the highest.

[0008] Furthermore, the number K of the rotor slots is 32±2.

[0009] Furthermore, the width H of the tooth portion is between 2.3-3.3 mm.

[0010] Furthermore, the area S of the rotor slot is 15-30 mm 2 .

[0011] Furthermore, a flange portion is formed between the shaft hole and the rotor slot, and the flange portion and the tooth portion form a magnetic field path.

[0012] Furthermore, the rotor slots contain cast aluminum, forming a squirrel cage structure as a whole.

[0013] Furthermore, the rotor punchings are used in a single-phase motor, and the power range of the single-phase motor is 1-3.5HP.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: by reasonably setting the number and area of the rotor slots and the width of the teeth, the ratio of the tooth width to the rotor outer diameter is made 1.43±0.2, and the ratio of the slot area to the rotor outer diameter is made 1.06±0.15, thereby increasing the tooth width, reducing the magnetic potential consumed in the tooth portion, improving performance, ensuring the cross-sectional area of the rotor, reducing the rotor induction resistance and loss, and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic structural diagram of the rotor punching of the utility model;

[0017] Figure 2 It is a partial schematic diagram of the rotor slot of the present utility model;

[0018] In the figure: 1, shaft hole; 2, tooth part; 3, rotor slot; 4, rotor part. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1The utility model provides a technical solution: a rotor punching for a single-phase motor used in a scroll compressor, comprising a punching body, an axial hole 1 being formed in the center of the punching body, a plurality of rotor slots 3 being evenly formed on the edge of the punching body, a tooth portion 2 being formed between adjacent rotor slots 3, the width of the tooth portion 2 being H, the number of the rotor slots 3 being K, the outer diameter of the rotor punching being D, and the area of a single rotor slot 3 being S;

[0021] The ratio of tooth width to rotor outer diameter is P1, P1=HK / D;

[0022] The ratio of the slot area to the rotor outer diameter is P2, P2=SK / 10*D;

[0023] P1=1.43±0.2, and P2=1.06±0.15, D=69mm±2, K=32±2, H is 2.3-3.3mm, S is 15-30mm 2 When the motor efficiency is the highest, P1 and P2 are within a certain ratio range, so that the width H of the tooth 2 and the area S of the rotor slot are both appropriate values, which not only meets the size requirements of the rotor slot 3, but also ensures the area of the tooth 2, reduces the magnetic potential consumed by the tooth, improves performance, and also ensures the cross-sectional area of the rotor, reduces the rotor induction resistance and loss, and improves efficiency.

[0024] like Figure 2 As shown, the space between the shaft hole 1 and the rotor slot 3 is the elbow portion 4, and the elbow portion 4 and the tooth portion 2 form a magnetic field path. The P1 ratio ensures the width of the tooth portion 2 and reduces the magnetic potential consumption on the tooth portion 2.

[0025] The rotor slots 3 contain cast aluminum, forming a squirrel cage structure as a whole.

[0026] The rotor punching is used for single-phase motors with a power range of 1-3.5HP. Motors within this power range have the highest efficiency when using the rotor punching.

[0027] The utility model reasonably optimizes the slot size and slot distribution of the rotor punching sheet, increases the rotor slot area, ensures the tooth area, reduces the rotor resistance, reduces the rotor aluminum loss, and improves the motor efficiency.

[0028] Some data examples:

[0029]

[0030] As shown in the table above, the two highest efficiencies are 88.1% and 88.2%, namely, Scheme 1 and Scheme 2. In Scheme 1, P1=1.429 and P2=1.058, both of which are in line with the numerical ranges of P1=1.43±0.2 and P2=1.06±0.15 in Claim 1; in Scheme 2, P1=1.35 and P2=1.097, also in line with the numerical ranges of P1 and P2 in Claim 1.

[0031] In Scheme 3, P1=1.20 is not within the numerical range of P1=1.43±0.2. In Scheme 4, P2=0.898 is not within the numerical range of P2=1.06±0.15. Although other values of Scheme 3 are close to those of Scheme 1, the efficiency of Scheme 3 is significantly lower than that of Scheme 1 due to the difference in P1. Other values of Scheme 4 are close to those of Scheme 2, but the efficiency of Scheme 4 is significantly lower than that of Scheme 2 due to the difference in P2.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rotor lamination for a single-phase motor used in a scroll compressor, comprising a lamination body, an axial hole formed in the center of the lamination body, a plurality of rotor slots uniformly formed on the edge of the lamination body, and teeth formed between adjacent rotor slots, characterized in that: The width of the tooth portion is H, the number of the rotor slots is K, the outer diameter of the rotor punching is D, and the area of a single rotor slot is S; The ratio of the tooth width to the rotor outer diameter is P1, P1=HK / D; The ratio of the slot area to the rotor outer diameter is P2, P2=SK / 10*D; The P1=1.43±0.2, P2=1.06±0.15, D=69mm±2, and the motor efficiency is the highest.

2. The rotor punching sheet of a single-phase motor used in a scroll compressor according to claim 1, characterized in that: The number K of the rotor slots is 32±2.

3. The rotor punching sheet of a single-phase motor used in a scroll compressor according to claim 1, characterized in that: The width H of the tooth portion is between 2.3-3.3 mm.

4. The rotor punching sheet of a single-phase motor used in a scroll compressor according to claim 1, characterized in that: The area S of the rotor slot is 15-30 mm 2 .

5. The rotor punching sheet of a single-phase motor used in a scroll compressor according to claim 1, characterized in that: The area between the shaft hole and the rotor slot is a tongue portion, and the tongue portion and the tooth portion form a magnetic field path.

6. The rotor punching sheet of a single-phase motor used in a scroll compressor according to claim 1, characterized in that: The rotor slots contain cast aluminum, forming a squirrel cage structure as a whole.

7. The rotor punching sheet of a single-phase motor used in a scroll compressor according to claim 1, characterized in that: The rotor punchings are used for single-phase motors with a power range of 1-3.5HP.

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