Stator punching sheet, stator core, motor and compressor

Abstract

The invention provides a stator punching sheet, a stator core, a motor and a compressor, relates to the technical field of compressors, and solves the technical problem of poor heat dissipation performance of a vortex motor. The stator punching sheet comprises a punching sheet body and a plurality of oil through holes arranged in a yoke part. And all the oil through holes and all the stator inner grooves are arranged in a one-to-one correspondence manner. According to the invention, the oil through holes are formed in the yoke part corresponding to the stator inner grooves, so that oil flowing from the edge originally is forced to flow to the internal opening area, and a flowing oil-gas mixture can take away most heat when flowing through the oil through holes, so that the heat dissipation performance of the stator during operation is greatly improved; the vortex motor can be kept at a low temperature in the operation process through good heat dissipation, resistance increase and magnetic loss increase caused by temperature rise are reduced, and therefore the efficiency and the output power of the motor are improved, the motor can stably operate in a wider load range, and good performance is kept.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a stator punching sheet, a stator core, a motor and a compressor. Background Art

[0002] Compressors are mostly used in low-energy consumption scenarios such as home appliances, and the background can be traced back to the demand for continuous improvement of motor performance. On the basis of traditional motors, in order to achieve higher power density, more compact structure and more efficient energy conversion, researchers continue to explore and innovate, and vortex motors came into being. Scroll motors have the advantages of high power density, high efficiency, low vibration and low noise, and high precision, but due to their compact structure, they have disadvantages such as high requirements for manufacturing precision and process, relatively difficult heat dissipation, and complex control systems.

[0003] The heat dissipation performance of the vortex motor has a crucial impact on its service life. First of all, good heat dissipation performance helps to reduce the operating temperature inside the motor. High temperature will accelerate the aging of the insulation materials inside the motor, such as the insulating paint of the winding. Working in a high temperature environment for a long time, the insulation performance will gradually decline, which may cause faults such as short circuits and shorten the service life of the motor. Secondly, high temperature will cause thermal expansion of the metal parts of the motor, which may affect the matching accuracy and mechanical properties between the parts. For example, the fit between the shaft and the bearing may become loose, increase wear, thereby reducing the running stability and reliability of the motor and shortening the service life. Furthermore, excessive temperature will also affect the performance of the magnetic materials inside the motor, affecting the efficiency and output performance of the motor. Over time, this performance degradation will become more and more obvious, and eventually affect the normal use of the motor. In addition, poor heat dissipation will lead to uneven temperature distribution inside the motor, and some local overheated areas are more likely to fail, thus affecting the service life of the entire motor. In short, good heat dissipation performance can keep the motor working within a suitable temperature range, reduce the aging, wear and performance degradation of components, and significantly extend the service life of the vortex motor.

[0004] Therefore, how to improve the heat dissipation performance of the vortex motor is a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The object of the present invention is to provide a stator punching sheet, a stator core, a motor and a compressor to solve the technical problem of poor heat dissipation performance of the vortex motor existing in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a stator punching sheet, comprising a punching sheet body, a plurality of teeth arranged on the inner side of the punching sheet body, a stator inner slot arranged between adjacent teeth; a yoke located between the bottom of the stator inner slot and the outer circle of the punching sheet body; and also comprising a plurality of oil holes arranged in the yoke; all the oil holes are arranged in a one-to-one correspondence with all the stator inner slots.

[0008] The stator punching sheet provided by the present invention has oil holes arranged on the yoke corresponding to the inner slot position of the stator, thereby forcing the oil originally flowing at the edge to flow to the internal opening area. The flowing oil-gas mixture can take away most of the heat when flowing through the oil holes, thereby greatly improving the heat dissipation performance of the stator during operation. Good heat dissipation can keep the vortex motor at a low temperature during operation, reduce the increase in resistance and magnetic loss caused by temperature increase, thereby improving the efficiency and output power of the motor, and enabling the motor to operate stably within a wider load range and maintain good performance.

[0009] As a further improvement of the present invention, the oil through hole is a long arc-shaped hole, and the length thereof is adapted to the bottom specification of the stator inner slot.

[0010] As a further improvement of the present invention, the two ends of the oil hole are semi-circular arc structures, and the radius R5 of the semi-circular arc structure is not greater than the radius R2 of the skeleton buckle point; the radius R5 of the semi-circular arc structure is equal to the distance from the intersection of the center line of the stator inner slot and the center line of the oil hole to the edge of the stator inner slot.

[0011] As a further improvement of the present invention, the angle E between the centers of the two semicircular arc structures satisfies the following formula: 0<E<360 / M; wherein M is the number of the inner slots of the stator.

[0012] As a further improvement of the present invention, a plurality of stator outer slots are further provided on the outer ring of the punching sheet body; the number of the stator outer slots is less than the number of the stator inner slots.

[0013] As a further improvement of the present invention, one of the stator outer grooves is located at the oil guide hole, and the other stator outer grooves are symmetrically distributed with the center line of the oil guide hole as the center.

[0014] As a further improvement of the present invention, the number of the stator outer slots is five, and four long outer slot protrusions and one short outer slot protrusion are formed between two adjacent stator outer slots and between the oil guide hole and the stator outer slot; the curvature of the stator outer slot at the position without the oil guide hole is C; the curvature of the stator outer slot corresponding to the position of the oil guide hole is F; the curvature of the long outer slot protrusion is B; the curvature of the short outer slot protrusion is D; the curvature of the oil through hole is E; wherein, A=D; 2C<the curvature of the long outer slot protrusion B<3C; the curvature D of the short outer slot protrusion is smaller than the curvature C of the stator outer slot at the position without the oil guide hole.

[0015] As a further improvement of the present invention, the stator outer slot is formed by connecting a number of short arc segments end to end, and the radius of each short arc segment is R1; the distance between the centers of adjacent short arc segments is R1; the center of each short arc segment is located on the first arc segment. The outer edge of the vortex motor stator is provided with a stator outer slot, and the design of the stator outer slot plays the role of oil flow during the operation of the compressor. The circulating oil can take away some of the heat from the motor. The area of ​​the stator outer slot has a significant effect on the heat dissipation performance of the motor. For the stator core, more heat from the motor can be taken away by increasing the surface area of ​​the stator outer slot, thereby achieving the purpose of heat dissipation for the motor.

[0016] As a further improvement of the present invention, the radius of the cutting circle between the straight edge of the stator outer slot and the center of the stator punching sheet is R3, and the radius of the circle where the skeleton buckle point is farthest from the center of the stator punching sheet is R4; the first arc segment is an arc segment connecting the two end points of the stator outer slot and the intersection A; wherein: the intersection A is the intersection of the midpoint between R3 and R4 and the center line of the stator outer slot.

[0017] The stator punching provided by the present invention changes the structure of the stator cooling channel and increases the flow area of ​​the stator surface when the compressor is running; at the same time, the number of outer slots of the outer edge stator is reduced, the contact area between the outer edge of the stator and the shell is increased, and the effect of heat dissipation in contact with the shell is increased; at the same time, an oil hole is set in the stator core to force the oil flowing at the edge to flow to the internal opening area, and the flowing oil-gas mixture can take away most of the heat when flowing through the oil hole; the contact area of ​​the remaining stator outer slot edge is increased, and the straight surface is changed to a curved surface, so that the contact area between the oil-gas mixture and the outer surface of the core is increased, and more heat can be taken away when passing through. By adding oil holes to the stator, the heat dissipation performance of the stator during operation is greatly improved. By changing the slot structure of part of the stator and optimizing the oil path, the problem of slow heat dissipation of the motor is solved, the motor loss is reduced, and the efficiency is increased.

[0018] The present invention provides a stator core, comprising a plurality of stator punching sheets; all of the stator punching sheets are stacked to form the stator core.

[0019] The stator core provided by the present invention reduces the number P of stator outer slots by adding oil through holes and modifying the number and shape of stator outer slots, with the constraint P < M; the number of added oil through holes is T, with the constraint T = M. The positions of the stator outer slots remain unchanged, and only the stator outer slots to be reduced are filled; the positions of the stator outer slots are roughly the same as those of the existing scroll stator, and are symmetrically distributed with respect to the center line of the stator outer slots where the oil guiding holes are located. The present invention optimizes the stress condition of the stator when the housing squeezes the stator during the hot sleeving of the stator, can ensure the stability of the stator structure to the greatest extent, and good heat dissipation can keep the scroll motor at a lower temperature during operation, reducing the increase in resistance and magnetic loss caused by temperature rise, thereby improving the efficiency and output power of the motor, enabling the motor to operate stably within a wider load range and maintaining good performance.

[0020] A motor provided by the present invention includes the stator core.

[0021] A compressor provided by the present invention is a scroll compressor and includes the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0023] Figure 1 is a schematic structural diagram of a stator core in the prior art;

[0024] Figure 2 is a schematic structural diagram of the stator core of the present invention;

[0025] Figure 3 is a specification dimension diagram of the stator core of the present invention;

[0026] Figure 4 is Figure 3 a partial enlarged view of S in;

[0027] Figure 5 is Figure 3 a partial enlarged view of T in;

[0028] Figure 6 is Figure 3 a partial enlarged view of U in;

[0029] Figure 7 is Figure 3 a partial enlarged view of V in;

[0030] Figure 81 is a schematic diagram of the partial structure of the stator core of the present invention (I);

[0031] Fig. 9 Schematic diagram of the partial structure of the stator core of the present invention (II);

[0032] Fig.10 It is a temperature comparison diagram of the motor of the present invention and the motor of the prior art.

[0033] In the figure, 1, stator core; 2, tooth part; 3, stator inner slot; 4, yoke part; 5, oil guide hole; 6, frame buckle point; 7, core buckle point; 10, oil hole; 20, stator outer slot; 30, long outer slot protrusion; 40, short outer slot protrusion. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0035] like Figure 1 The figure shows a schematic diagram of the structure of the stator core 1 of the motor in the conventional scroll compressor. In order to solve the problem of poor heat dissipation effect of the existing scroll motor, the present invention provides a stator punching sheet with improved structure.

[0036] Specifically, Figure 2 As shown, the stator punching sheet of the present invention includes a punching sheet body, a plurality of teeth 2 arranged on the inner side of the punching sheet body, a stator inner slot 3 arranged between adjacent teeth 2; a yoke 4 located between the bottom of the stator inner slot 3 and the outer circle of the punching sheet body; and also includes a plurality of oil holes 10 arranged in the yoke 4; all the oil holes 10 are arranged in a one-to-one correspondence with all the stator inner slots 3.

[0037] like Figure 2 As shown, the stator punching sheet has M teeth 2, N core buckling points 7, and the number of stator inner slots 3 is also M. One tooth 2 corresponds to three core buckling points 7, then 3N=M; the number of oil holes 10 is also M.

[0038] The stator punching provided by the present invention provides an oil hole 10 at the position of the yoke 4 corresponding to the stator inner slot 3, thereby forcing the oil originally flowing at the edge to flow to the internal opening area. The flowing oil-gas mixture can take away most of the heat when flowing through the oil hole 10, greatly improving the heat dissipation performance of the stator during operation. Good heat dissipation can keep the vortex motor at a low temperature during operation, reduce the increase in resistance and magnetic loss caused by temperature increase, thereby improving the efficiency and output power of the motor, and allowing the motor to operate stably within a wider load range and maintain good performance.

[0039] As an optional embodiment of the present invention, the oil hole 10 is a long arc-shaped hole, and the length is adapted to the bottom specification of the stator inner slot 3, such as Figure 2 As shown, the oil through hole 10 is arranged close to the stator inner slot 3, and the length of the oil through hole 10 is close to the bottom width of the stator inner slot 3.

[0040] Furthermore, in this embodiment, if Figure 3 and Figure 7 As shown, both ends of the oil hole 10 are semicircular arc structures, and the radius R5 of the semicircular arc structure is not greater than the radius R2 of the frame buckle point 6; the radius R5 of the semicircular arc structure is equal to the distance from the intersection of the center line of the stator inner slot 3 and the center line of the oil hole 10 to the edge of the stator inner slot 3.

[0041] The specification requirements of the oil hole 10 of the present invention are: the radius of the skeleton buckle point 6 is R2, the radius of the semicircular arcs at both ends of the oil hole 10 is R5 (R5≤R2), H is a point on the center line of the stator inner slot 3, the distance between H and the center line and the three sides of the stator inner slot is R5, and the angle between the centers of the semicircular arcs at both ends is E.

[0042] As an optional embodiment of the present invention, Figure 3 As shown, the angle E between the centers of the two semicircular arc structures satisfies the following formula: 0<E<360 / M; wherein M is the number of the stator inner slots 3, and the newly added oil holes 10 are beneficial to improving the heat dissipation performance of the stator.

[0043] In order to further improve the heat dissipation performance of the motor, such as Figure 1-Figure 9 As shown, a plurality of stator outer slots 20 are also provided on the outer ring of the punch body; the number P of the stator outer slots 20 is less than the number M of the stator inner slots 3.

[0044] Specifically, Figure 2 and Figure 3 As shown, one of the stator outer slots 20 is located at the oil guide hole 5, and the other stator outer slots 20 are symmetrically distributed with the center line of the oil guide hole 5 as the center.

[0045] As an alternative embodiment of the present invention, the number of stator outer grooves 20 is five. Four long outer groove protrusions 30 and one short outer groove protrusion 40 are formed between two adjacent stator outer grooves 20 and between the oil guiding hole 5 and the stator outer groove 20. The radian of the stator outer groove 20 at the position without the oil guiding hole 5 is C; the radian of the stator outer groove 20 corresponding to the position of the oil guiding hole 5 is F; the radian of the long outer groove protrusion 30 is B; the radian of the short outer groove protrusion 40 is D; the radian of the oil through hole 10 is E. Wherein, A = D; 2C < the radian B of the long outer groove protrusion 30 < 3C; the radian D of the short outer groove protrusion 40 is less than the radian C of the stator outer groove 20 at the position without the oil guiding hole 5.

[0046] The specification requirements of the stator outer groove 20 of the present invention are as follows: the radian of the longer stator outer edge (long outer groove protrusion 30) is B, the radian of the stator outer groove 20 without the oil guiding hole 5 is C, the radian of the shorter stator outer edge (short outer groove protrusion 40) is D, the radian of the oil through hole 10 is E, and the radian of the stator outer groove 20 at the position of the oil guiding hole 5 is F. Among them, the radians of two kinds of stator outer grooves 20 are the same, that is, A = F, 2C < B < 3C, and the radians of four longer stator outer edges are the same, and D is always less than C. This structure can balance the heat dissipation of the contact between the stator outer edge and the housing and the heat dissipation of the surface of the stator outer groove 20 to the greatest extent.

[0047] Without changing the original position of the stator outer groove 20 of the present invention, two by two connections are made between the existing eight stator outer grooves, so as to form outer groove protrusions with a radian of B distributed in four directions. The advantage of this is that it optimizes the stress condition of the stator when the housing squeezes the stator during the stator hot sleeve, and can ensure the stability of the stator structure to the greatest extent.

[0048] As Figure 4-Figure 9 shown, the stator outer groove 20 is formed by connecting a plurality of short arc segments end to end. The radius of each short arc segment is R1; the distance between the centers of adjacent short arc segments is R1; the center of each short arc segment is located on the first arc segment. There is a stator outer groove 20 left on the outer edge of the scroll motor stator. The design of the stator outer groove 20 plays a role in passing oil during the operation of the compressor. The circulating oil can take away part of the heat on the motor. The area size of the stator outer groove 20 has a significant impact on the heat dissipation performance of the motor. For the stator core 1, more heat on the motor can be taken away by increasing the surface area of the stator outer groove 20, so as to achieve the purpose of dissipating heat for the motor.

[0049] As Figure 6 shown, the radius of the tangent circle of the straight edge of the stator outer groove 20 and the center of the stator punching is R3, and the radius of the circle where the skeleton buckle point 6 is farthest from the center of the stator punching is R4; the first arc segment is an arc segment connecting the two end points and the intersection point A of the stator outer groove 20; wherein: the intersection point A is the intersection point of the midpoint between R3 and R4 and the center line of the stator outer groove 20.

[0050] The design idea of ​​the stator outer slot 20 and the outer slot protrusion structure of the present invention is: the radius of the small circle where the short arc segments of all stator outer slots are located is R1, the interval between the small circles where the short arc segments of adjacent stator outer slots are located is R1, and they are equidistantly arranged on the arc ⌒1, ⌒1=GR1 (G≤20), and the short arc segment of the stator outer slot 20 with the oil guide hole 5 is characterized in that one end of the short arc segment is connected to the stator outer slot, and the other end is connected to the extension line of the circle where the oil guide hole 5 is located, and the intersection point is Q; the short arc segment in the stator outer slot 20 without the oil guide hole 5 is connected to the stator outer slot at both ends, and connected to each other in the middle, so that the surface area of ​​the stator outer slot can be appropriately increased, such as Figure 4 , Figure 6 , Figure 8 and Fig. 9 shown.

[0051] The stator punching provided by the present invention changes the structure of the stator cooling channel and increases the flow area of ​​the stator surface when the compressor is running; at the same time, the number of the outer slots 20 of the outer edge stator is reduced, the contact area between the outer edge of the stator and the shell is increased, and the effect of heat dissipation in contact with the shell is increased; at the same time, an oil hole 10 is set in the stator core 1, forcing the oil originally flowing at the edge to flow to the internal opening area, and the flowing oil-gas mixture can take away most of the heat when flowing through the oil hole 10; the contact area of ​​the edge of the remaining stator outer slot 20 is increased, and the straight surface is changed to a curved surface, so that the contact area between the oil-gas mixture and the outer surface of the core is increased, and more heat can be taken away when passing through. By adding the oil hole 10 to the stator, the heat dissipation performance of the stator during operation is greatly improved. By changing the slot structure of part of the stator and optimizing the oil passage path, the problem of slow heat dissipation of the motor is solved, the motor loss is reduced, and the efficiency is increased.

[0052] like Figure 1-Figure 9 As shown, a stator core 1 provided by the present invention includes a plurality of stator punching sheets; all the stator punching sheets are stacked to form a stator core 1. Specifically, the stator core 1 also includes an oil guide hole 5, a tooth portion 2, a stator inner slot 3, a stator outer slot 20, a core buckle point 7, and a skeleton buckle point 6. A plurality of tooth portions 2 are provided on the stator core 1, and the plurality of tooth portions 2 are distributed along the circumferential direction. The plurality of tooth portions 2 are connected as a whole by a yoke portion 4, and the yoke portion 4 is located on the outer side of the tooth portion 2. A stator inner slot 3 is formed between the yoke portion 4 and two adjacent tooth portions 2. The stator inner slot 3 is provided with a notch on the opposite side of the yoke portion 4, which is a stator outer slot 20. The winding conductor is wound on the stator tooth portion 2 through the notch position and filled in the stator inner slot 3. The stator outer slot 20 is distributed on the periphery of the core, and the number is less than the number of the stator inner slot 3. The number of the skeleton buckle points 6 is equal to the number of the stator inner slot 3.

[0053] The stator core 1 provided by the present invention reduces the number P of the outer stator slots 20 by adding oil through holes 10 and modifying the number and shape of the outer stator slots 20, and restricts P < M; the number of the added oil through holes 10 is T, and restricts T = M. The positions of the outer stator slots 20 remain unchanged, and only the outer stator slots 20 to be reduced are filled; the positions of the outer stator slots 20 are substantially the same as those of the existing scroll stator, and are symmetrically distributed with respect to the center line where the outer stator slots 20 at the position of the oil guiding hole 5 are located. The present invention optimizes the stress condition of the stator when the housing extrudes the stator during the hot sleeving of the stator, and can ensure the stability of the stator structure to the greatest extent. Good heat dissipation can keep the scroll motor at a lower temperature during operation, reduce the increase in resistance and magnetic loss caused by the temperature rise, thereby improving the efficiency and output power of the motor, enabling the motor to operate stably within a wider load range and maintaining good performance.

[0054] A motor provided by the present invention includes a stator core 1.

[0055] The motor reduces the number of stator outer slots 20 on the basis of a conventional vortex motor. The conventional motor includes 9 stator outer slots 20, and the motor of the present invention includes 5 stator outer slots 20. R3 is the radius of the tangent circle between the straight side of the stator outer slot 20 and the center of the stator before the change, R4 is the radius of the circle drawn between the farthest point of the skeleton buckle point 6 from the center of the circle and the center of the circle, the intersection of the midpoint of the difference between R3 and R4 and the center line is taken as point A, ⌒1 is the arc formed by the two end points of the slot and point A, and a circle with a radius of R1 is drawn from one end point of ⌒1 to the other end point, ⌒1=GR1 (G<=20, where G is 20), the distance between adjacent circle centers on ⌒1 is a radius R1, the intersection point of the curved side of the extended groove and the upper semicircle of the small circle is taken, the arcs above all the adjacent small circle intersections are taken to obtain a new groove figure, and the remaining groove arcs are drawn in the same way as above. This structure can increase the surface area when the stator slot distance is constant. The contact area between the stator outer slot 20 and the shell is increased, and the contact heat dissipation effect with the shell is enhanced; the surfaces of the five stator outer slots 20 are curved. After rough calculation, the surface area of ​​the five curved outer slots is about 0.776 times the surface area of ​​the conventional nine outer slots. After curving, the surface area of ​​a single stator outer slot is increased by 139.68% compared with the conventional surface area, which increases the contact area with the oil-gas mixture during the operation of the compressor. The number of stator outer slots 20 is reduced, and the passage of the oil-gas mixture is reduced, which will lead to an increase in the oil discharge rate during the operation of the compressor, a slowdown in the oil flow rate, and accumulation on the upper layer of the stator. More oil will flow toward the coil direction, and the heating of the motor comes from the stator and rotor. The interaction between the heat generation and the internal diffusion to the outside, at this time, an oil hole 10 is set on the periphery of each coil, so that the accumulated oil-gas mixture flows through the oil hole 10 on the periphery of the coil. At this time, the heat dissipation acts near the heat source. The radius of R5 and the radius R2 of the skeleton buckle point 6 have certain constraints. The maximum value of R5 cannot exceed R2. If R5 is too large, there is a probability that the stator teeth will be squeezed and deformed during the shrink sleeve, affecting the stability of the motor during installation. In addition, if R5 is too large, the oil-gas mixture will have a probability of passing through the motor without contacting the iron core, which has a certain impact on the heat dissipation function. In this proposal, R5=1 / 2R2 is taken to test the heat dissipation performance of the motor. The heat dissipation performance of the motor is shown in Fig.10 It can be seen that the stator of the present invention greatly improves the heat dissipation performance during the operation of the motor, and the temperature increase has a greater advantage compared with conventional motors.

[0056] like Fig.10 As shown, it is a temperature comparison diagram of a motor without oil holes 10 and before the structure of the stator outer slot 20 is improved in the prior art and the improved motor of the present invention. It can be seen from the figure that the temperature of the improved motor is lower than that of the prior art motor before the improvement when the motor runs for different time periods, indicating that the heat dissipation effect is better, and the difference is more obvious when the running time is short, that is, the heat dissipation effect is better.

[0057] A compressor provided by the present invention is a scroll compressor, comprising a motor.

[0058] It should be noted that the above only shows the optimal design scheme. Without changing the overall technical path and ideas, the designer can simply increase the types of stator punchings of the stator core 1, adjust the values ​​of R1 and R5, or stack and buckle them at different axial positions on the stator core 1. Such further optimization and modification of the core scheme are all within the scope of protection of the present invention.

[0059] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A stator punching sheet, comprising a punching sheet body, a plurality of teeth arranged on the inner side of the punching sheet body, a stator inner slot arranged between adjacent teeth; a yoke located between the bottom of the stator inner slot and the outer circle of the punching sheet body; characterized in that: It also includes a plurality of oil holes arranged in the yoke; all of the oil holes are arranged in one-to-one correspondence with all of the stator inner slots.

2. The stator sheet according to claim 1, characterized in that: The oil through hole is a long arc-shaped hole, and the length thereof is adapted to the bottom specification of the stator inner slot.

3. The stator sheet according to claim 1, characterized in that: The two ends of the oil hole are semicircular arc structures, and the radius R5 of the semicircular arc structure is not greater than the radius R2 of the frame buckle point; the radius R5 of the semicircular arc structure is equal to the distance from the intersection of the center line of the stator inner slot and the center line of the oil hole to the edge of the stator inner slot.

4. The stator sheet according to claim 3, characterized in that: The angle E between the centers of the two semicircular arc structures satisfies the following formula: 0<E<360 / M; wherein M is the number of the inner slots of the stator.

5. The stator sheet according to claim 1, characterized in that: A plurality of stator outer slots are also arranged on the outer ring of the punching sheet body; the number of the stator outer slots is less than the number of the stator inner slots.

6. The stator sheet according to claim 5, characterized in that: One of the stator outer grooves is located at the oil guide hole, and the other stator outer grooves are symmetrically distributed with the center line of the oil guide hole as the center.

7. The stator sheet according to claim 6, characterized in that: The number of the stator outer slots is five, and four long outer slot protrusions and one short outer slot protrusion are formed between two adjacent stator outer slots and between the oil guide hole and the stator outer slot; the curvature of the stator outer slot at the position without the oil guide hole is C; The curvature of the stator outer groove corresponding to the oil guide hole position is F; the curvature of the long outer groove protrusion is B; the curvature of the short outer groove protrusion is D; the curvature of the oil through hole is E; wherein, A=D; 2C<the curvature of the long outer groove protrusion B<3C; the curvature D of the short outer groove protrusion is smaller than the curvature C of the stator outer groove at the position without the oil guide hole.

8. The stator sheet according to claim 5, characterized in that: The stator outer slot is formed by connecting a number of short arc segments end to end, the radius of each short arc segment is R1; the distance between the centers of adjacent short arc segments is R1; the center of each short arc segment is located on the first arc segment.

9. The stator sheet according to claim 8, characterized in that: The radius of the cutting circle between the straight edge of the stator outer slot and the center of the stator punching sheet is R3, and the radius of the circle where the skeleton buckle point is farthest from the center of the stator punching sheet is R4; the first arc segment is an arc segment connecting the two end points of the stator outer slot and the intersection A; wherein: the intersection A is the intersection of the midpoint between R3 and R4 and the center line of the stator outer slot.

10. A stator core, characterized in that: It comprises a plurality of stator punching sheets as described in any one of claims 1 to 9; all of the stator punching sheets are stacked to form the stator core.

11. A motor, characterized in that: It comprises the stator core as claimed in claim 10.

12. A compressor, characterized in that: A scroll compressor comprises the motor as claimed in claim 11.

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