CN208128006U - Stator punching, stator core, motor and refrigerator - Google Patents

Abstract

The utility model relates to the field of motors, and discloses a stator punch, a stator iron core, a motor and a refrigerator. The stator punch includes a body (10) with a central hole (11), and the body (10) is provided with A plurality of stator slots (12) communicated with the central hole (11), the stator slots (12) include a plurality of small slots (12a) and a plurality of large slots (12b), and the small slots (12a) are along The depth in the radial direction is smaller than the depth in the radial direction of the large grooves (12b), and a plurality of the small grooves (12a) are distributed and arranged symmetrically along the circumferential direction of the center hole (11), and a plurality of the large grooves (12b) ) are distributed at intervals along the circumferential direction of the central hole (11) and arranged symmetrically. In the utility model, by making a plurality of stator slots include large slots and small slots, and at the same time making the large slots and small slots symmetrically arranged, the magnetic density distribution of the stator punch is more uniform and the magnetic density margin is larger. It is easier to control the temperature rise of the motor during use, which is conducive to meeting the high torque operation requirements of the motor.

Description

Stator punching, stator core, motor and refrigerator

technical field

The utility model relates to a motor, in particular to a stator punch, a stator core, a motor and a refrigerator.

Background technique

The main function of the motor is to generate driving torque to provide power for electrical appliances or various machinery. Generally, a motor includes a stator and a rotor, wherein the stator includes a stator core and a stator winding fixed on the stator core, wherein the stator core is generally formed by stacking a plurality of stator punches along the axial direction of the motor.

Taking refrigerators as an example, the compressor motors of traditional refrigerators generally use single-phase asynchronous motors, and the stator punches of single-phase asynchronous motors are made of silicon steel sheets, which are similar to rectangles in shape. Generally, the outer contour of the stator stamping is formed by connecting two sets of parallel line segments and two sets of chamfers, which includes a body with a central hole, and a plurality of motor windings communicated with the central hole are arranged on the body. The stator slots are arranged at intervals along the circumference of the central hole.

However, in order to save steel and silicon sheets, one set of parallel line segments of the stator punching sheet is longer, and the other set of parallel line segments is shorter, so that the distance between one set of parallel lines is greater than the distance between the other set of parallel lines, and Since the stator slots have the same size, the yoke width of the straight part of the outer contour is much smaller than that of the outer chamfered part, resulting in the yoke density of the straight part of the outer contour being much larger than that of the outer chamfered part, which affects the output power of the motor , which also affects the performance of the motor, and in the application to the large-power compressors of commercial models, the magnetic density of the stator punching is too high, resulting in a high temperature rise of the motor. In addition, because the punching is an asymmetric structure, it is difficult to ensure the magnetic density uniform.

Utility model content

The purpose of the utility model is to overcome the problem of high temperature rise of the motor caused by the high magnetic density of the stator punching sheet in the prior art, and provide a stator punching sheet, the magnetic density distribution of the stator punching sheet is more uniform, the magnetic density The margin is greater.

In order to achieve the above object, the utility model provides a stator punching piece on the one hand, the stator punching piece includes a body with a central hole, a plurality of stator slots communicating with the central hole are arranged on the body, the stator punching piece The grooves include a plurality of small grooves and a plurality of large grooves, the depth of the small grooves in the radial direction is smaller than the depth of the large grooves in the radial direction, and a plurality of the small grooves are distributed at intervals along the circumference of the central hole And arranged symmetrically, a plurality of the large grooves are arranged at intervals along the circumference of the central hole and arranged symmetrically.

Preferably, the plurality of stator slots are divided into four groups, each group of stator slots includes two small slots and a plurality of large slots, and the small slots of adjacent two groups of stator slots are adjacent.

Preferably, four large slots are arranged between two small slots of the same set of stator slots.

Preferably, the outer contour of the body is formed by setting the adjacent sides of the square as arc transitions, the four arcs are located on a circle, and the center of the circle where the four arcs are located Concentric with the center of the center hole.

Preferably, the side length of the square used to form the outer contour of the body is 110-120 mm, and the diameter of the central hole is 59-63 mm.

Preferably, the slot width of the stator slot is 2.0-2.4mm, and the tooth width of the stator slot is 3.2-4.0mm.

Preferably, the stator slot is a pear-shaped slot or a flat-bottomed slot.

The second aspect of the present invention provides a stator core, the stator core includes a plurality of the above-mentioned stator punching pieces.

The third aspect of the utility model provides a motor, which includes the stator core.

The fourth aspect of the utility model provides a refrigerator, which includes the motor.

In the utility model, by making a plurality of stator slots include stator slots with different depths along the radial direction, that is, large slots and small slots, and at the same time, the large slots and small slots are symmetrically arranged, so that the magnetic density of the stator punching sheet The distribution is more uniform and the magnetic density margin is larger, which makes it easier to control the temperature rise of the motor during use, which is conducive to meeting the high torque operation requirements of the motor.

Description of drawings

Fig. 1 is a schematic structural view of a stator punch provided by a specific embodiment of the present invention.

Explanation of reference signs

10-body; 11-center hole;

12-stator slot; 12a-small slot;

12b-big slot; 13-; installation hole;

w1- slot width of stator slot; w2- tooth width of stator slot.

Detailed ways

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

In the present utility model, in the case of no contrary description, the used orientation words such as "up, down, left, right, top, bottom" usually refer to the direction shown in the drawings or to the vertical direction. , vertical or gravitational direction to describe the mutual positional relationship between the components. In addition, "inside and outside" means inside and outside with respect to the outline of each member itself. In addition, "plurality" referred to in the present invention means two or more and includes two.

The utility model will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

According to one aspect of the present invention, as shown in FIG. 1 , the stator punch provided by the specific embodiment of the present invention includes a body 10 with a central hole 11 , and the body 10 is provided with a plurality of The stator slot 12, the stator slot 12 includes a plurality of small slots 12a and a plurality of large slots 12b, the depth of the small slots 12a in the radial direction is smaller than the depth of the large slots 12b in the radial direction, and the plurality of small slots 12a along the The circumferential direction of the central hole 11 is arranged symmetrically at intervals, and a plurality of large grooves 12b are arranged at intervals along the circumferential direction of the central hole 11 and arranged symmetrically. Wherein, considering cost factors and processing techniques, preferably, the stator slot 12 may be a pear-shaped slot or a flat-bottomed slot.

In the utility model, by making a plurality of stator slots 12 include stator slots with different depths along the radial direction, that is, large slots and small slots, and making the large slots and small slots symmetrically arranged at the same time, so that the magnetism of the stator punching sheet The density distribution is more uniform and the magnetic density margin is larger, which makes it easier to control the temperature rise of the motor during use, which is conducive to meeting the high torque operation requirements of the motor.

Further, the plurality of stator slots 12 are divided into four groups, and each group of stator slots 12 includes two small slots 12a and a plurality of large slots 12b (that is to say, in order to realize the symmetrical arrangement of the stator slots 12, the plurality of stator slots 12 includes 8 small slots 12a), the small slots 12a of two adjacent sets of stator slots 12 are adjacent. For example, as shown in FIG. 1 , the body is divided into four parts by a first reference straight line d2 passing through the center of the central hole 11 and extending transversely and a second reference straight line d1 passing through the center of the central hole 11 and extending longitudinally. , that is, correspondingly divide the plurality of stator slots 12 into four groups, so that the small slots 12a of two adjacent groups of stator slots 12 are symmetrical with respect to the first reference straight line d2 or the second reference straight line d1.

Furthermore, there are 16 large slots 12b, that is to say, there are 4 large slots 12b between the two small slots 12a of the same set of stator slots 12, this arrangement makes the stator punching plate provided by the utility model On the basis of ensuring that the stator punching material is reasonable, the performance of the stator punching is guaranteed, and the magnetic density margin of the stator punching is increased. At the same time, the performance of the motor is guaranteed during use, and the temperature rise of the compressor is better controlled.

Wherein, the shape of the outer contour of the body 10 can be selected according to the actual situation. Preferably, in this embodiment, the outer contour of the body 10 is formed by setting adjacent sides of a square as arc transitions, That is to say, as shown in FIG. 1 , the outer contour of the body 10 in this embodiment includes 4 straight line segments and 4 circular arcs, the four circular arcs are located on the same circle, and the center of the circle where the four circular arcs are located Concentric with the center of the center hole 11 . In this way, the magnetic density margin can be further improved, and at the same time, the performance of the motor can be guaranteed during use.

In addition, considering the processing technology and cost factors, preferably, the side length of the square used to form the outer contour of the body 10 is 110-120 mm, and the diameter of the central hole 11 is 59-63 mm. Preferably, The diameter of the central hole 11 is 61mm. The notch width w1 of the stator slot is 2.0-2.4 mm, and the tooth width w2 of the stator slot is 3.2-4.0 mm. It should be noted that the notch width w1 of the stator slot here refers to the size of the opening of the stator slot, that is, the size of the position directly connected with the central hole; the slot tooth width w2 of the stator slot here refers to the size of the adjacent The distance between the two stator slots is shown in Figure 1.

According to another aspect of the utility model, the stator core provided by the specific embodiment of the utility model includes a plurality of the above-mentioned stator punches, specifically, a plurality of mounting holes 13 can be provided on the body 10, for example, as shown in FIG. 1 One installation hole 13 can be respectively provided at the four arc positions of the outer contour of the body 10, so that the structure is more compact and the installation is more convenient.

According to still another aspect of the present utility model, the specific embodiment of the present utility model provides a motor comprising the above-mentioned stator core. Of course, the motor also includes windings, which are wound on the stator core, and the windings may include primary phase windings and secondary phase windings, and the primary phase windings and secondary phase windings are copper wires or aluminum wires respectively. Wire. Since the stator punching according to the utility model has the above-mentioned technical effects, the motor according to the utility model also has the corresponding technical effects, that is, it has the characteristics of miniaturization, high efficiency and low cost, and can be assembled in a compressor with limited space. Among them, there is a sufficient safety distance between the wire pack of the motor and the spring at the installation hole, and the performance of the motor is effectively guaranteed.

According to still another aspect of the utility model, the refrigerator provided by the specific implementation manner of the utility model includes the above-mentioned motor.

The preferred implementation of the present utility model has been described in detail above in conjunction with the accompanying drawings, however, the present utility model is not limited thereto. Within the scope of the technical concept of the utility model, various simple modifications can be made to the technical solution of the utility model, including combinations of specific technical features in any suitable manner. In order to avoid unnecessary repetition, the utility model will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the content disclosed by the utility model, and all belong to the protection scope of the utility model.

Claims (10)

1. A stator punch, characterized in that the stator punch includes a body (10) with a central hole (11), and the body (10) is provided with multiple holes communicating with the center hole (11). a stator slot (12), and the stator slot (12) comprises a plurality of small slots (12a) and a plurality of large slots (12b), and the depth of the small slots (12a) in the radial direction is smaller than that of the large slots ( 12b) depth along the radial direction, a plurality of small grooves (12a) are distributed and symmetrically arranged along the circumferential direction of the central hole (11), and a plurality of large grooves (12b) are arranged along the central hole (12b) 11) are distributed at circumferential intervals and arranged symmetrically. 2. The stator punching sheet according to claim 1, characterized in that, a plurality of said stator slots (12) are divided into four groups, and each group of said stator slots (12) includes two said small slots (12a) It is adjacent to a plurality of the large slots (12b), and the small slots (12a) of two adjacent groups of the stator slots (12). 3. The stator stamping according to claim 2, characterized in that, four large slots (12b) are arranged between two small slots (12a) of the same set of stator slots (12). 4. The stator punching sheet according to claim 1, characterized in that, the outer contour of the body (10) is formed by setting the adjacent sides of the square as arc transitions, and the four arcs Located on a circle, the center of the circle where the four arcs are located is concentric with the center of the center hole (11). 5. The stator punching sheet according to claim 4, characterized in that, the side length of the square used to form the outer contour of the body (10) is 110-120mm, and the diameter of the central hole (11) 59-63mm. 6. The stator punching sheet according to claim 1, characterized in that, the notch width (w1) of the stator slot is 2.0-2.4mm, and the tooth width (w2) of the stator slot is 3.2-4.0mm . 7. The stator punching sheet according to claim 1, characterized in that, the stator slot (12) is a pear-shaped slot or a flat-bottomed slot. 8. A stator core, characterized in that the stator core comprises a plurality of stator punching pieces according to any one of claims 1-7. 9. An electrical machine, characterized in that the electrical machine comprises the stator core as claimed in claim 8. 10. A refrigerator, characterized in that the refrigerator comprises the motor according to claim 9.