Stator core structure suitable for screw compressor

Abstract

The stator core structure comprises an iron core body and a mounting column, the iron core body is formed by laminating a plurality of first punching sheets, each first punching sheet is of a circular structure, the inner side of each first punching sheet is uniformly provided with a plurality of punching sheet grooves, and the outer side of each first punching sheet is provided with a flat edge. The flat edge forms a first welding plane, and the mounting column and the first welding plane are welded and fixed; the number of the flat edges is at least three. According to the utility model, the mounting columns are welded on the outer side of the iron core body, and a large gap is arranged between the iron core body and the mounting columns, so that enough refrigerants can pass through to cool the iron core body and an internal coil, and the performance of the motor is further ensured. The iron core body is formed by combining and laminating two punching sheets made of different materials, the main body adopts a silicon steel sheet, and stainless steel sheets are arranged at two ends, so that the strength of the iron core body is improved while the smoothness of a magnetic circuit of the motor is ensured, and magnetic leakage is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, especially a kind of stator core structure suitable for screw compressor. BACKGROUND

[0002] Refrigeration compressor motor is cooled by the refrigerant in the compressor, and the motor used by the compressor usually has high power density due to the good coolant, and the thermal load of the motor is high. The traditional stator is connected by keyway, pin and shell, and the outer diameter size of the stator core and the inner hole of the shell are small gap fit. The surface of the core is basically close to the inner hole, and the refrigerant is difficult to flow through the gap between the inner wall of the shell and the outer diameter of the core. The refrigerant basically flows through the air gap between the core inner hole and the rotor or the coil in the slot. The refrigerant flows through the small cross-sectional area of this cooling mode, and the surface of the stator core cannot be directly cooled. SUMMARY

[0003] In view of the defects of the prior art, the main purpose of the utility model is to overcome the shortcomings of the prior art, and disclose a stator core structure suitable for screw compressor, which comprises a core body and a mounting column. The core body is composed of a plurality of first punching sheets, the first punching sheets are circular in structure, a plurality of punching sheet grooves are uniformly arranged on the inner side of the first punching sheets, and a flat edge is arranged on the outer side. After a plurality of first punching sheets are laminated, the flat edges form a first welding plane, and the mounting column is welded and fixed with the first welding plane. The flat edge is provided with at least three.

[0004] Further, the flat edge is provided with four equal intervals, and the mounting column is provided with four corresponding.

[0005] Further, the side edge of the mounting column is provided with a second welding plane.

[0006] Further, the mounting column is provided with a connecting hole at both ends.

[0007] Further, the core body is laminated with a second punching sheet at both ends, the thickness of the second punching sheet is 2mm±0.1mm, and the second punching sheet is a stainless steel sheet.

[0008] Further, the flat edge of the first punching sheet is provided with a groove on both sides, the groove forms a fixing groove after the first punching sheet is laminated, and the fixing groove is embedded with a buckle strip.

[0009] Further, the buckle strip is interference fit with the fixing groove.

[0010] Further, the first punching sheet is a silicon steel sheet, and the thickness is 0.5mm±0.05mm.

[0011] Further, the iron core body is circumferentially spaced apart from at least four fixing holes.

[0012] The utility model discloses obtained the beneficial effect:

[0013] The utility model discloses a mounting column is welded to the outside of the iron core body, and the mounting column is arranged between the iron core body and the mounting column to form a large gap, so that the refrigerant can pass through the gap to cool the iron core body and the internal coil, thereby ensuring the performance of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model discloses a kind of stator core structures suitable for screw compressor, as shown in

[0015] Figure 2 The utility model discloses a kind of stator core structures suitable for screw compressor, as shown in

[0016] Figure 3 The utility model discloses a kind of stator core structures suitable for screw compressor, as shown in

[0017] Figure 4 The utility model discloses a kind of stator core structures suitable for screw compressor, as shown in

[0018] Figure 5 The utility model discloses a kind of stator core structures suitable for screw compressor, as shown in

[0019] The following signs are as follows:

[0020] 1, iron core body, 2, mounting column, 3, buckle strip, 11, first punching, 12, second punching, 13, fixed hole, 111, punching slot, 112, flat edge, 113, recess, 21, connecting hole, 8, motor shell, 9, end cover. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail below by combining with drawings and examples.

[0022] A kind of stator core structure suitable for screw compressor, as shown in Figures 1-5As shown, including the core body 1 and mounting column 2, the core body 1 is composed of a plurality of first punching sheet 11, the first punching sheet 11 is circular structure, the inner side of the first punching sheet is uniformly provided with a plurality of punching sheet groove 111, the outer side is provided with a flat edge 112, a plurality of first punching sheet 11 is stacked, the flat edge forms a first welding plane, the mounting column 2 is welded and fixed with the first welding plane; the flat edge 112 is provided with at least three; when the flat edge 112 is provided with three, three first welding planes are formed; preferably, the three flat edges 112 are distributed at equal intervals. The mounting column 2 is fixed on the first welding plane. The core body 1 is installed in the motor shell 8, the core body 1 is supported in the motor shell 8 through the mounting column 2, there is a large gap between the core body 1 and the motor shell 8, so that sufficient refrigerant enters the gap to cool the core body 1. Ensure the performance of the motor.

[0023] In an embodiment, as shown in Figures 1-5 The flat edge 112 is provided at equal intervals. Correspondingly, the mounting column 2 is provided with four.

[0024] In an embodiment, as shown in Figures 1-5 The side edge of the mounting column 2 is provided with a second welding plane. After the first welding plane and the second welding plane are fitted, the two sides of the mounting column 2 and the first welding plane are fixed by welding. At the same time, the first punching sheet 11 is connected and fixed through the welding seam, thereby improving the strength of the core body 1.

[0025] In an embodiment, as shown in Figures 1-5 The two ends of the mounting column 2 are provided with connecting holes 21. The end cover 9 of the motor is fixed by bolts and connecting holes. Preferably, the connecting hole is a screw hole.

[0026] In an embodiment, as shown in Figures 1-5 As shown, the two ends of the core body 1 are stacked with the second punching sheet 12, the thickness of the second punching sheet 12 is 2mm±0.1mm; the second punching sheet 12 is a stainless steel sheet. The stainless steel plate has good magnetic shielding performance and reliable mechanical strength, which not only prevents magnetic leakage, but also effectively ensures the strength of the two end faces of the core.

[0027] In the above embodiment, as shown in Figures 1-5 The outer shape structure of the second punching sheet 12 is the same as that of the first punching sheet 11, which only differs in material and thickness.

[0028] In an embodiment, as shown in Figures 1-5 As shown, the two sides of the flat edge of the first punching sheet 11 are provided with grooves 113, the grooves 113 form a fixed groove after the first punching sheet 11 is stacked, and the fixed groove is embedded with the buckle strip 3. Preferably. The buckle strip 3 is embedded in the fixed groove by cold pressing interference fit, and the first punching sheet 11 and the second punching sheet 12 after being connected and stacked are connected by the buckle strip 3. Make it into a whole, thereby increasing the strength of the core body 1.

[0029] In an embodiment, as shown in Figures 1-5 The first punching sheet 11 is a silicon steel sheet with a thickness of 0.5mm±0.05mm. This ensures the smoothness of the magnetic circuit of the motor.

[0030] In an embodiment, as shown in Figures 1-5 The iron core body 1 is provided with at least four fixing holes 13 at equal intervals in the circumferential direction. The motor shell 8 is provided with pin holes at corresponding positions. When the iron core body 1 is installed in the motor shell 8, the pin holes are aligned with the fixing holes 13, and the pin holes and the fixing holes 13 are connected by a pin.

[0031] In use, as shown in Figures 1-5 The first punching sheet 11 is a silicon steel sheet with a thickness of 0.5mm±0.05mm. This ensures the smoothness of the magnetic circuit of the motor.

[0032] The above is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; if the modification or equivalent replacement of the present application does not deviate from the spirit and scope of the present application, it should be covered in the protection scope of the claims of the present application.

Claims

1. A stator core structure suitable for screw compressors, characterized in that, The device includes a core body and mounting posts. The core body is composed of several stacked first laminations. The first laminations are circular in shape. Several lamination grooves are evenly arranged on the inner side of the first laminations, and flat edges are provided on the outer side. After several first laminations are stacked, the flat edges form a first welding plane. The mounting posts are welded and fixed to the first welding plane. At least three flat edges are provided.

2. The stator core structure for a screw compressor according to claim 1, characterized in that, Four equal-spaced flat edges are provided, and correspondingly, four mounting columns are provided.

3. The stator core structure for a screw compressor according to claim 1, characterized in that, A second welding plane is provided on the side of the mounting column.

4. The stator core structure for a screw compressor according to claim 1, characterized in that, The mounting post has connection holes at both ends.

5. A stator core structure suitable for a screw compressor according to claim 1, characterized in that, The two ends of the iron core body are stacked with second laminations, the thickness of the second laminations is 2mm±0.1mm; the second laminations are stainless steel sheets.

6. A stator core structure suitable for a screw compressor according to claim 1, characterized in that, The first punch has grooves on both sides of its flat edge. After the first punch is stacked, the grooves form a fixing groove, and a fastener strip is embedded in the fixing groove.

7. A stator core structure suitable for a screw compressor according to claim 6, characterized in that, The fastener strip is interference-fitted with the fixing groove.

8. A stator core structure suitable for a screw compressor according to claim 1, characterized in that, The first lamination is a silicon steel sheet with a thickness of 0.5mm ± 0.05mm.

9. A stator core structure suitable for a screw compressor according to claim 1, characterized in that, The iron core body is provided with at least four fixing holes at circumferential intervals.

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