Stator and compressor

Abstract

The application discloses a kind of stator and compressor, it is related to motor technical field, wherein stator includes annular yoke part and the tooth part made of amorphous material, the inner hole of yoke part is arranged with multiple first grooves along its circumference, multiple tooth parts are correspondingly installed into multiple first grooves, can improve iron loss under the premise of not changing the original stator's external dimensions and installation mode, improve the energy efficiency of product;Tooth part includes tooth body and tooth shoe, the second installation part of two side walls of tooth body along circumference is positioned and connected with the first installation part in first groove, so that the installation of tooth part and yoke part is more stable, and the side wall of tooth body far from tooth shoe side can be abutted with the bottom wall of first groove, so that the gap between first groove and tooth body is smaller, tooth part and yoke part pass through multiple directions perpendicular to multiple circumferential wall surfaces of first groove and pass magnetic flux, can improve the smoothness of magnetic flux transmission between yoke part and amorphous material tooth part.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to a stator and compressor. Background Technology

[0002] Traditional refrigerator compressor stators are typically made of laminated silicon steel sheets. However, silicon steel sheets suffer from high hysteresis and eddy current losses, resulting in high iron losses. In related technologies, amorphous materials have lower iron losses compared to silicon steel, leading some motors to use amorphous materials instead of silicon steel sheets. However, amorphous materials are thin and have low structural strength, resulting in stators with low structural strength that cannot meet the assembly requirements of refrigerator compressor stators. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a stator in which the teeth are made of amorphous material, which can meet the requirements of stator structural strength and ensure the smooth transmission of magnetic flux between the yoke and the teeth when they are made of different materials.

[0004] The present invention also proposes a compressor having the above-described stator.

[0005] According to a first aspect of the present invention, a stator includes: a yoke arranged in a ring, the yoke having an inner hole, the wall of the inner hole having a plurality of first grooves spaced apart along the circumference of the inner hole, the first grooves having a first mounting portion; a plurality of teeth made of amorphous material, correspondingly mounted in the plurality of first grooves, each tooth including a tooth shoe, a tooth body and a second mounting portion, a portion of the tooth body being located in the first groove, the tooth shoe being connected to the side of the tooth body near the center of the inner hole, the second mounting portion being connected to two sidewalls of the tooth body along the circumference, the second mounting portion being connected to the first mounting portion to restrict the tooth from disengaging from the yoke; the sidewall of the tooth body away from the tooth shoe being configured to abut against the bottom wall of the first groove.

[0006] The stator according to embodiments of the present invention has at least the following beneficial effects:

[0007] By setting an annular yoke and arranging multiple first grooves along its circumference in the inner hole of the yoke, multiple teeth made of amorphous material are correspondingly installed into the multiple first grooves. The amorphous material teeth are installed as independent components into the yoke made of the original material, which can meet the requirements of stator structural strength, improve iron loss and increase product energy efficiency without changing the original stator's external dimensions and installation method. Moreover, the high utilization rate of the tooth mold helps to reduce costs. After the tooth body is installed into the first groove, the second mounting part of the tooth body along the two side walls along the circumference is positioned and connected with the two first mounting parts in the first groove, making the installation of the teeth and yoke more stable. In addition, the side wall of the tooth body away from the tooth shoe can abut against the bottom wall of the first groove, making the gap between the first groove and the tooth body smaller. The teeth and yoke can transmit magnetic flux in multiple directions perpendicular to the multiple circumferential walls of the first groove, which can improve the smoothness of magnetic flux transmission between the yoke and the amorphous material teeth.

[0008] According to some embodiments of the present invention, the first mounting portion includes a radial limiting groove, which is disposed on at least one of two sidewalls of the first groove arranged opposite to each other along the circumference. The second mounting portion includes a first protrusion disposed on the side of the tooth body away from the tooth shoe and protruding from at least one of the two sidewalls of the tooth body along the circumference. The first protrusion is positioned and connected to the radial limiting groove.

[0009] According to some embodiments of the present invention, the two sidewalls of the first groove arranged opposite to each other along the circumference are a first sidewall and a second sidewall, the first sidewall and the second sidewall respectively facing the two sidewalls of the tooth body along the circumference; the first sidewall and / or the second sidewall are provided with a fixing mechanism, the fixing mechanism being used to apply pressure to the sidewall of the tooth body.

[0010] According to some embodiments of the present invention, the fixing mechanism includes a second protrusion connected to the first sidewall and the second sidewall, and the two second protrusions apply pressure to both sides of the tooth body by deformation.

[0011] According to some embodiments of the present invention, the first sidewall and the second sidewall are respectively provided with a second groove extending along the axial direction of the stator, and the second protrusion is provided on the bottom wall of the second groove and protrudes out of the groove opening of the second groove.

[0012] According to some embodiments of the present invention, the second protrusion protrudes from the opening of the second groove by a dimension of W1, where W1 is greater than or equal to 0.05 mm; and / or, the difference between the width of the first groove and the width of the tooth body is D, where D is greater than or equal to 0.05 mm and less than or equal to 0.1 mm; and / or, the minimum distance between the two second protrusions is W3, and the width of the tooth body is W4, satisfying: 0.0005≤δ / W3≤0.0015, where δ=W4-W3; and / or, at least one of the first sidewall and the second sidewall abuts against the sidewall of the tooth body.

[0013] According to some embodiments of the present invention, the yoke includes a plurality of first yoke blanks and at least one second yoke blank, the plurality of first yoke blanks and at least one second yoke blank being stacked along the axial direction, and at least one first yoke blank being connected to each end of the second yoke blank along the axial direction; the first yoke blanks have two oppositely arranged first notches at the first groove, and the plurality of first yoke blanks are stacked such that the two first notches respectively form the second groove; the second yoke blanks have two oppositely arranged second notches at the first groove, and the bottom walls of the two second notches are respectively provided with first blank protrusions protruding toward the tooth body, and the two first blank protrusions can be bent along the axial direction and abut against the two side walls of the tooth body.

[0014] According to some embodiments of the present invention, the second yoke lamination has a plurality of laminations, and N first yoke laminations are stacked between two adjacent second yoke laminations. The thickness of the first yoke lamination is t, which satisfies: 1mm / t≤N≤15mm / t.

[0015] According to some embodiments of the present invention, the tooth portion is formed by stacking amorphous material sheets along the axial direction of the stator; and / or, the yoke portion is formed by stacking metal material sheets along the axial direction.

[0016] According to some embodiments of the present invention, the first mounting portion includes a first concave-convex structure disposed on two sidewalls of the first groove arranged opposite each other along the circumference, and the second mounting portion includes a second concave-convex structure disposed on both sides of the tooth body along the circumference and cooperating with the first concave-convex structure.

[0017] According to a second aspect of the present invention, a stator includes: a yoke arranged in an annular shape, the yoke having an inner hole, the wall of the inner hole having a plurality of first grooves spaced apart along the circumferential direction of the inner hole; a plurality of teeth made of amorphous material, correspondingly installed in the plurality of first grooves, the portions of the teeth being located within the first grooves; two sidewalls of the first grooves arranged opposite each other along the circumferential direction of the stator respectively having second grooves, the bottom walls of the two second grooves respectively having second protrusions protruding from the openings of the second grooves, the two second protrusions respectively applying pressure to both sides of the teeth along the circumferential direction by deformation, and the sidewall of the teeth located on one side of the first groove along the radial direction of the stator being configured to abut against the bottom wall of the first groove.

[0018] The stator according to embodiments of the present invention has at least the following beneficial effects:

[0019] By setting an annular yoke and arranging multiple first grooves along its circumference in the inner hole of the yoke, multiple teeth made of amorphous material are correspondingly installed into the multiple first grooves. The amorphous material teeth are installed as independent components into the yoke made of the original material, which can meet the requirements of stator structural strength, improve iron loss and increase product energy efficiency without changing the original stator's external dimensions and installation method. Moreover, the high utilization rate of the tooth mold helps to reduce costs. Part of the teeth is located in the first groove, and the two sidewalls of the first groove arranged opposite each other along the circumference are respectively provided with second grooves. The bottom wall of each part is provided with a second protrusion protruding from its groove. The two second protrusions are respectively constructed as spring structures. After the two spring structures cooperate with the tooth, they deform and apply pressure to both sides of the tooth in the circumferential direction, thereby clamping the tooth and making the installation of the tooth and yoke more stable. Moreover, the side wall of the tooth located on the first groove side in the radial direction can abut against the bottom wall of the first groove, so that the gap between the first groove and the tooth is smaller. The tooth and yoke can transmit magnetic flux in multiple directions perpendicular to multiple circumferential wall surfaces of the first groove, which can improve the smoothness of magnetic flux transmission between the yoke and the amorphous material tooth.

[0020] According to some embodiments of the present invention, the stator further includes at least one stator lamination, the stator lamination including an integrally formed stator yoke portion and a stator tooth portion, the projected contour line of the stator lamination along the axial direction coincides with the projected contour line of the yoke portion and the tooth portion after assembly; the stator lamination is located at at least one end of the stator along the axial direction.

[0021] According to a third aspect of the present invention, a compressor includes a rotor and a stator as described in the above embodiments, wherein the rotor is rotatably disposed within the stator.

[0022] According to some embodiments of the present invention, the compressor further includes a housing and a crankcase, and a plurality of corner portions of the yoke are respectively provided with mounting holes that extend through the axial direction of the stator. The stator is bolted through the mounting holes and fixedly connected to the crankcase, and the bottom of the stator is connected to the bottom of the housing by a seat spring.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a schematic diagram of the stator structure according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 The top view of the stator shown;

[0027] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 1 Schematic diagram of the structure of the middle yoke;

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 This is a schematic diagram of the structure of the first yoke lamination according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the second yoke lamination according to an embodiment of the present invention;

[0032] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0033] Figure 9 for Figure 1 Enlarged schematic diagram of the middle tooth section;

[0034] Figure 10 for Figure 9 Top view of the teeth shown;

[0035] Figure 11 This is a schematic diagram of the stator structure according to another embodiment of the present invention;

[0036] Figure 12 for Figure 11 Schematic diagram of the structure of the middle stator lamination;

[0037] Figure 13 for Figure 11 The diagram shows the structure of the stator after the teeth are hidden.

[0038] Figure 14 This is a schematic diagram of the compressor according to an embodiment of the present invention, wherein the housing is hidden.

[0039] Icon labels:

[0040] Stator 1000; Crankcase 2000; Seat spring 3000;

[0041] Yoke 100; Inner hole 110; First groove 120; First sidewall 121; Second sidewall 122; Mounting hole 130; First mounting part 140; Radial limiting groove 141; Fixing mechanism 150; Second protrusion 151; Second groove 160; First yoke punch 170; First notch 171; Second yoke punch 180; Second notch 181; First punch protrusion 182; Rivet point 190;

[0042] Tooth portion 200; tooth shoe 210; tooth body 220; second mounting portion 230; first protrusion 231; radial sidewall 240;

[0043] Stator lamination 300; stator yoke 310; stator tooth 320. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0046] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0047] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0048] Reciprocating compressors are commonly used in refrigeration equipment such as refrigerators and freezers. As a core component of refrigeration equipment, the reciprocating compressor is used to compress the refrigerant in the refrigeration cycle. Inside the compressor housing, a motor assembly drives the crankshaft to rotate. The crankshaft, through a connecting rod, drives the piston to reciprocate within the cylinder, thereby achieving the intake, compression, and exhaust of the refrigerant. The motor assembly includes a stator and a rotor; the rotor is fixedly connected to the crankshaft, and the stator is fixedly connected to the crankcase.

[0049] Traditional stators are typically made by laminating silicon steel sheets. These sheets are stamped into laminations of the same specifications, and the laminations are then stacked to form the stator. However, silicon steel sheets have high iron losses, especially in the stator teeth, which leads to a decrease in compressor efficiency.

[0050] To address the issue of high iron loss in the stator 1000, this invention provides a stator 1000 that combines a toothed portion 200 made of amorphous material with a yoke portion 100 made of a metal sheet (e.g., silicon steel sheet). This combination structure ensures the structural strength of the compressor stator 1000 while effectively reducing its iron loss and maintaining smooth magnetic flux transmission between the yoke portion 100 and the toothed portion 200 when they are made of different materials. The stator 1000 of this invention will be described below with reference to the accompanying drawings.

[0051] Reference Figure 1 , Figure 2 and Figure 4 As shown, a stator 1000 according to an embodiment of the present invention includes a yoke 100 and teeth 200. The yoke 100 is arranged in a ring shape and is generally made of a metal material such as silicon steel. The yoke 100 has an inner hole 110, and the wall of the inner hole 110 is provided with a plurality of first grooves 120, which are spaced apart circumferentially along the inner hole 110. There are a plurality of teeth 200, the number of which matches the number of first grooves 120, and the plurality of teeth 200 are installed one-to-one in the plurality of first grooves 120. The teeth 200 are made of an amorphous material such as an amorphous alloy.

[0052] The following description uses the mating structure of one set of first grooves 120 and teeth 200 as an example. The tooth 200 includes a toothed shoe 210 and a toothed body 220, with a portion of the toothed body 220 located within the first groove 120. The toothed shoe 210 is connected to the side of the toothed body 220 near the center of the inner hole 110. The toothed shoe 210 is located outside the first groove 120, protruding from the yoke 100 and located within the inner hole 110.

[0053] Reference Figure 2 and Figure 3 As shown, to maintain the transmission of magnetic flux between the tooth portion 200 and the yoke portion 100, the wall surface of the tooth body 220 located within the first groove 120 at least partially abuts against the wall surface of the first groove 120. The sidewall of the tooth body 220 away from the tooth shoe 210 is configured to abut against the bottom wall of the first groove 120; that is, along the radial direction of the stator 1000, the sidewall of the tooth body 220 away from the inner hole 110 abuts against the bottom wall of the first groove 120 that mates with this sidewall. It should be noted that the abutment relationship between the two walls here can be partial or complete. Since portions of the two circumferential sidewalls of the tooth body 220 are also located within the first groove 120, the transmission of magnetic flux between the yoke portion 100 and the tooth portion 200 can occur through the three adjacent walls of the tooth body 220 and the three walls of the first groove 120, as shown in Figure [reference needed]. Figure 2 As can be seen from the magnetic induction lines shown, the magnetic flux is transmitted from the yoke 100 to the tooth 200 and from the tooth 200 to the yoke 100, respectively, with at least three magnetic flux transmission channels in each direction (including but not limited to directions perpendicular to multiple circumferential walls of the first groove 120), ensuring the smooth transmission of magnetic flux between the two different materials, the tooth 200 and the yoke 100.

[0054] Reference Figure 1 and Figure 3 As shown, to further improve the connection stability between the tooth 200 and the yoke 100, a first mounting portion 140 is provided in the first groove 120. The tooth 200 includes a second mounting portion 230, which is connected to the two circumferential sidewalls of the tooth body 220. The positions of the second mounting portion 230 and the first mounting portion 140 are adapted, and the first mounting portion 140 and the second mounting portion 230 are mutually limitingly connected, thereby restricting the tooth 200 from disengaging from the yoke 100 radially. Because the gap between the tooth 200 and the yoke 100 is designed to be small, the first mounting portion 140 and the second mounting portion 230 abut at multiple positions, which also restricts the tooth 200 from disengaging from the yoke 100 axially.

[0055] With the cooperation of the first mounting part 140 and the second mounting part 230, the gap between the first groove 120 and the tooth body 220 is smaller, and the gap between the tooth part 200 and the yoke part 100 along the direction of the three magnetic flux transmission channels is smaller, which can further improve the smoothness of magnetic flux transmission.

[0056] Reference Figure 4 , Figure 5 and Figure 9As shown, in this embodiment of the invention, the yoke 100 is formed by riveting stamped silicon steel sheets. The rivet points 190 are simultaneously stamped while the silicon steel sheets are being stamped. Therefore, this process allows the yoke sheets to be stacked into a yoke sheet assembly, making assembly more convenient and the structure more stable. Alternatively, the yoke sheets can also be stacked and fixed by welding. In this embodiment of the invention, the toothed portion 200 is formed by stacking amorphous material sheets along the axial direction of the stator 1000, while the yoke 100 is formed by stacking metal material sheets along the axial direction. The toothed portion 200 is typically formed by gluing stamped amorphous alloy sheets. Since the thickness of the amorphous alloy sheet can be as low as 0.02 mm, which is at least one-tenth the thickness of the silicon steel sheet, the glue bonding process causes minimal damage to the amorphous alloy sheet and is more convenient to operate.

[0057] It should be noted that amorphous materials have the characteristic of low iron loss, and the thickness of amorphous materials can be as low as 0.02mm, which is at least one-tenth the thickness of silicon steel sheets. Therefore, the tooth 200 made of amorphous materials has the advantages of low hysteresis loss and low eddy current loss, thus improving the energy efficiency of the compressor.

[0058] Although the saturation magnetic flux density of amorphous materials is lower than that of silicon steel, the motor operating magnetic flux density of reciprocating compressors used in refrigeration equipment such as refrigerators is relatively low. Even if the tooth 200 made of amorphous material causes a decrease in saturation magnetic flux density, the compressor in this embodiment can still meet the usage requirements of this type of product, that is, it has basically no impact on the performance of the compressor.

[0059] Reference Figure 1 As shown, the stator 1000 of a reciprocating compressor is typically made of sheet metal material stacked axially. The connection between the stator 1000 and the compressor housing is generally as follows: axially penetrating mounting holes 130 are provided at the four corners of the yoke 100; the stator 1000 is bolted through the mounting holes 130 and fixed to the crankcase 2000; and the stator 1000 is connected to the bottom of the housing by a seat spring 3000.

[0060] Because amorphous materials have low strength, they are prone to damage during compressor operation after being connected to the seat spring 3000. Furthermore, tightening bolts onto amorphous materials can easily lead to excessive localized stress and damage. If the entire stator 1000 were made of amorphous material, the stator 1000's fixing method would need to be redesigned, increasing its dimensions and manufacturing costs. Additionally, since the rotor cannot be made of amorphous material, the amorphous material within the stator 1000's inner bore cannot be effectively utilized after stamping, resulting in significant material waste and further increasing manufacturing costs.

[0061] To address the aforementioned issues, this embodiment of the invention uses amorphous material only in the tooth section 200, and installs the tooth section 200 as an independent component into the yoke section 100. Meanwhile, the yoke section 100 continues to use sheet-like metal material, and its installation structure within the housing does not require redesign. Furthermore, this embodiment of the invention allows for the fabrication of the tooth section 200 using amorphous narrow strip material, resulting in high die utilization, which helps reduce costs while improving the energy efficiency of the compressor product.

[0062] Reference Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the first mounting portion 140 includes a radial limiting groove 141, which extends in a radial direction perpendicular to the stator 1000 and communicates with the first groove 120. The first groove 120 has two circumferentially opposite sidewalls, a first sidewall 121 and a second sidewall 122, which face the two circumferential sidewalls of the gear body 220, respectively. One of the first sidewall 121 or the second sidewall 122 may be provided with the radial limiting groove 141, or both the first sidewall 121 and the second sidewall 122 may be provided with the radial limiting groove 141.

[0063] Reference Figure 3 and Figure 9 As shown, the second mounting portion 230 includes a first protrusion 231 positioned and connected to the radial limiting groove 141. The first protrusion 231 is located on the side of the tooth body 220 away from the tooth shoe 210 and protrudes from at least one of the two side walls of the tooth body 220 along the circumferential direction. The first protrusion 231 and the radial limiting groove 141 are arranged in a one-to-one correspondence, with each first protrusion 231 fitting one radial limiting groove 141. In order to improve the radial connection stability between the tooth portion 200 and the yoke portion 100, the first side wall 121 and the second side wall 122 of this embodiment are both provided with radial limiting grooves 141, and the two side walls of the tooth body 220 are respectively provided with first protrusions 231.

[0064] In some embodiments, refer to Figure 3 , Figure 9 and Figure 10 As shown, along the radial direction of the stator 1000, the sidewall of the first protrusion 231 away from the tooth shoe 210 is coplanar with the sidewall of the tooth body 220 away from the tooth shoe 210. Therefore, in this embodiment, the stator 1000 increases the contact area of ​​the radial sidewall 240 of the tooth portion 200, thereby improving the transmission efficiency of the magnetic flux transmission channel in the direction perpendicular to the radial sidewall 240 and enhancing the smoothness of magnetic flux transmission.

[0065] In some embodiments, the first protrusion 231 may also be disposed in the center of the tooth body 220 in the radial direction, or disposed near the bottom wall of the first groove 120, which is not specifically limited here.

[0066] Reference Figure 3 and Figure 5 As shown, in some embodiments of the present invention, in order to improve the axial connection stability of the tooth 200 and the yoke 100, a fixing mechanism 150 is provided on the first sidewall 121 or the second sidewall 122. The fixing mechanism 150 is used to apply pressure to the sidewall of the tooth body 220. When the fixing mechanism 150 and the radial limiting groove 141 are respectively provided, the fixing mechanism 150 and the radial limiting groove 141 are usually respectively provided on both sides of the tooth body 220, so that the force on the tooth 200 is more balanced.

[0067] As an alternative embodiment, the first sidewall 121 and the second sidewall 122 are respectively provided with fixing mechanisms 150. The two fixing mechanisms 150 can jointly apply clamping force to the tooth body 220, thereby making the connection between the tooth 200 and the yoke 100 more stable.

[0068] Reference Figure 5 As shown in this embodiment of the invention, the fixing mechanism 150 includes second protrusions 151 connected to the first sidewall 121 and the second sidewall 122. The two second protrusions 151 apply pressure to both sides of the tooth body 220 through deformation. The two second protrusions 151 are respectively constructed as spring structures. After the second protrusions 151 cooperate with the tooth 200, they deform themselves to clamp the tooth 200, making the installation of the tooth 200 and the yoke 100 more stable.

[0069] Reference Figure 3 and Figure 5 As shown, in order to further reduce the gap between the two circumferential sidewalls of the tooth 200 and the first sidewall 121 and the second sidewall 122, and to improve the transmission efficiency of the magnetic flux channels perpendicular to the first sidewall 121 and the second sidewall 122, the first sidewall 121 and the second sidewall 122 are respectively provided with second grooves 160 extending axially. A second protrusion 151 is provided on the bottom wall of the second groove 160, and the second protrusion 151 protrudes from the opening of the second groove 160. The first sidewall 121 and the second sidewall 122 still maintain a small contact gap with the tooth 200 in areas not covered by the second groove 160. It is understood that, in order to achieve the deformation characteristics of the second protrusion 151, the second protrusion 151 cannot extend continuously along the axial direction, but is arranged at intervals along the axial direction, thereby ensuring that the tooth 200 can be clamped by the second protrusion 151 after being installed in the first groove 120.

[0070] Reference Figure 5 As shown, and through Figure 7 , Figure 8 and Figure 10To aid understanding, in order to ensure that the gap between the tooth 200 and the yoke 100 meets the requirements for magnetic flux transmission, and at the same time, the second protrusion 151 can effectively clamp the tooth 200 without damaging it, the second protrusion 151 protrudes from the opening of the second groove 160 by a size of W1, which is limited to greater than or equal to 0.05 mm.

[0071] In this embodiment, the difference between the width W5 of the first groove 120 and the width W4 of the tooth body 220 is D, where D = W5 - W4, and D is limited to between 0.05 mm and 0.1 mm. This ensures a loose fit between the tooth 200 and the yoke 100, preventing damage to the amorphous material tooth 200 due to excessive tightness. At the same time, the gap between the tooth 200 and the yoke 100 is not too large, thereby reducing the magnetic field influence at the connection between the tooth 200 and the yoke 100 and preventing magnetic flux obstruction.

[0072] In this embodiment, at least one of the first sidewall 121 and the second sidewall 122 abuts against the sidewall of the tooth body 220. When the first sidewall 121 abuts against the corresponding sidewall of the tooth body 220, the abutment relationship can be partial or complete. When the second sidewall 122 abuts against the corresponding sidewall of the tooth body 220, the abutment relationship can be partial or complete.

[0073] In this embodiment, the minimum distance between the two second protrusions 151 is W3, the width of the tooth body 220 is W4, δ=W4-W3, and δ / W3∈[0.0005, 0.0015]. By limiting the above parameter range, this embodiment can ensure that the tooth 200 and the first groove 120 of the yoke 100 are reliably assembled and do not loosen, while the contact pressure of the second protrusion 151 on the tooth 200 is controlled within a safe range.

[0074] Reference Figure 5 , Figure 6 and Figure 7 As shown, in one embodiment of the present invention, the yoke 100 includes a plurality of yoke tabs stacked axially. To realize the structure of the second groove 160 and the second protrusion 151 in the above embodiment of the present invention, the plurality of yoke tabs include a plurality of first yoke tabs 170 and at least one second yoke tab 180. It is understood that the first yoke tabs 170 and the second yoke tabs 180 are usually stamped from metal materials such as silicon steel. During the stamping process, silicon steel can simultaneously stamp out a plurality of rivet points 190. The first yoke tabs 170 and the second yoke tabs 180 are riveted together through the corresponding rivet points 190 to achieve a fixed connection.

[0075] Reference Figure 6As shown, in the first yoke piece 170, there are two first notches 171 arranged opposite to each other at the first groove 120. After multiple first yoke pieces 170 are stacked, the two first notches 171 respectively form two second grooves 160.

[0076] Reference Figure 7 As shown, in the second yoke punch 180, there are two second notches 181 arranged opposite to each other in the first groove 120, and the bottom walls of the two second notches 181 are respectively provided with first punch protrusions 182 protruding toward the tooth body 220.

[0077] Reference Figure 3 and Figure 5 As shown, at least one first yoke punch 170 is connected to each end of the second yoke punch 180 along the axial direction. After the second yoke punch 180 and the multiple first yoke punches 170 are stacked, the two second notches 181 and the two first notches 171 form two second grooves 160, and the first punch protrusion 182 forms a second protrusion 151. The two first punch protrusions 182 can be bent along the axial direction and abut against the two side walls of the tooth body 220.

[0078] Reference Figure 5 As shown, it can be understood that there are multiple second yoke laminations 180, and N first yoke laminations 170 are stacked between two adjacent second yoke laminations 180. The thickness of the first yoke lamination 170 is t, which can be 0.5mm, 0.35mm, 0.3mm, 0.25mm, 0.2mm, etc. In this embodiment, when the range of 1mm / t ≤ N ≤ 15mm / t is satisfied, a second yoke lamination 180 is inserted every N first yoke laminations 170, based on the thickness of the first yoke laminations 170. This ensures that the first lamination protrusion 182 has sufficient deformation space at the first groove 120, while simultaneously satisfying the clamping function of the toothed portion 200. For example, when the first yoke lamination 170 is made of silicon steel sheet with a thickness of 0.5mm, N is 2 to 30, and correspondingly, the thickness of the first yoke laminations 170 stacked between two adjacent second yoke laminations 180 is 1mm to 15mm.

[0079] In another embodiment of the present invention, the yoke 100 includes a plurality of first yoke laminations 170 stacked along the axial direction, at least one third yoke lamination, and at least one fourth yoke lamination. The structure of the first yoke laminations 170 is the same as that in the previous embodiment and can be understood by reference.

[0080] In the third yoke blank, there are two oppositely arranged third notches at the first groove 120, and the bottom wall of one of the two third notches is provided with a second blank protrusion protruding toward the tooth body 220.

[0081] In the fourth yoke piece, there are two fourth notches arranged opposite to each other in the first groove 120. In the same first groove 120 formed together with the third yoke piece, the bottom wall of the two fourth notches opposite to the second piece protrusion is provided with a third piece protrusion protruding toward the tooth body 220.

[0082] The fixing mechanism 150 includes a second punch protrusion and a third punch protrusion. When the first yoke punch 170, the third yoke punch and the fourth yoke punch are stacked axially, the second punch protrusion can be bent axially and abut against one side wall of the tooth body 220, and the third punch protrusion can be bent axially and abut against the other side wall of the tooth body 220.

[0083] It should be noted that the third yoke stamp and the fourth yoke stamp may not overlap the first yoke stamp 170, or one or more first yoke stamps 170 may overlap. There shall be at least three yoke stamps (first yoke stamp 170 or fourth yoke stamp and their combination) between two adjacent third yoke stamps, and at least three yoke stamps (first yoke stamp 170 or fourth yoke stamp and their combination) between two adjacent fourth yoke stamps.

[0084] In another embodiment of the stator 1000 of the present invention, the first mounting portion 140 includes a first concave-convex structure disposed on two circumferentially opposite sidewalls of a first groove 120, and the second mounting portion 230 includes a second concave-convex structure disposed on both sides of the tooth body 220 along the circumferential direction and cooperating with the first concave-convex structure. This embodiment achieves the positioning connection between the tooth portion 200 and the yoke portion 100 through the cooperation of the first and second concave-convex structures, thereby improving the connection stability of the tooth portion 200 and the yoke portion 100.

[0085] Reference Figure 1 , Figure 2 and Figure 3 As shown, a stator 1000 according to another embodiment of the present invention includes a yoke 100 and teeth 200. The yoke 100 is arranged in a ring shape and has an inner hole 110. A plurality of first grooves 120 are arranged at intervals along the circumference of the inner hole 110. There are multiple teeth 200, all of which are made of amorphous material. The multiple teeth 200 are correspondingly installed within the multiple first grooves 120, such that a portion of the structure of each tooth 200 is located within the first groove 120.

[0086] The first groove 120 has two sidewalls arranged opposite each other along the circumference of the stator 1000, namely the first sidewall 121 and the second sidewall 122. The first sidewall 121 and the second sidewall 122 are respectively provided with second grooves 160. The bottom walls of the two second grooves 160 are respectively provided with second protrusions 151 protruding from the opening of the second groove 160. The two second protrusions 151 apply pressure to both sides of the tooth 200 along the circumference by deformation. It can be understood that the two second protrusions 151 are respectively constructed as spring structures. After the second protrusions 151 cooperate with the tooth 200, they deform themselves, thereby clamping the tooth 200, making the installation of the tooth 200 and the yoke 100 more stable.

[0087] The sidewall of the tooth 200 located radially along the stator 1000 on one side of the first groove 120 is a radial sidewall 240, which is configured to abut against the bottom wall of the first groove 120. It should be noted that the abutment between the radial sidewall 240 and the bottom wall of the first groove 120 can be partial or complete. Since portions of the two circumferential sidewalls of the tooth 200 are also located within the first groove 120, and these portions are close to the first sidewall 121 and the second sidewall 122, the gap between the first groove 120 and the tooth 200 is small. Therefore, magnetic flux transmission between the yoke 100 and the tooth 200 can occur through the three adjacent walls of the tooth 200 and the three walls of the first groove 120, as shown in the figure. Figure 2 As can be seen from the magnetic induction lines shown, the magnetic flux is transmitted from the yoke 100 to the tooth 200 and from the tooth 200 to the yoke 100, respectively, with at least three magnetic flux transmission channels in three directions (including but not limited to directions perpendicular to the multiple circumferential walls of the first groove 120), which can improve the smoothness of magnetic flux transmission between the yoke 100 and the amorphous material tooth 200.

[0088] Reference Figure 11 , Figure 12 and Figure 13 As shown, in another embodiment of the stator 1000 of the present invention, in order to improve the connection reliability after the stator 1000 is installed inside the compressor or motor, the stator 1000 of this embodiment has... Figure 1 Based on the relevant embodiments shown, at least one stator lamination 300 is also included. The stator lamination 300 includes an integrally formed stator yoke portion 310 and a stator tooth portion 320. The stator lamination 300 can be integrally stamped from metal materials such as silicon steel. To facilitate connection with the yoke lamination, rivet points 190 can also be stamped simultaneously during the stamping process of the stator lamination 300. The stator lamination 300 is located at at least one end of the stator 1000 along the axial direction. Multiple stator laminations 300 are stacked to form a stator lamination group. The stator lamination group and the yoke lamination group are stacked and installed, thereby enhancing the reliability of the connection of the stator 1000.

[0089] To ensure the stability of the air gap between the rotor and stator 1000, the axial projection contour of the stator lamination 300 coincides with the projection contour of the yoke 100 and tooth 200 after assembly. It should be noted that since the stator lamination 300 is a single-piece structure, its inner and outer contours are continuous lines; while the yoke 100 and tooth 200 are assembled structures, their inner and outer contours overlap at the mating points, and the projection of the stator lamination 300 at these points is not present. Therefore, in this embodiment, the overlap of the projection contours should be interpreted as the overlap of the inner contour of the stator shoe, the outer contour of the stator yoke, and the contour of the winding groove, while other contours are essentially overlapped.

[0090] Reference Figure 14 As shown, a compressor according to one embodiment of the present invention includes a rotor and a stator 1000 as described in the previous embodiment, with the rotor rotatably disposed within the stator 1000. In this embodiment, the stator 1000 features an annular yoke 100 with multiple first grooves 120 arranged circumferentially within the inner hole 110 of the yoke 100. Multiple teeth 200 made of amorphous material are correspondingly installed within these first grooves 120. The amorphous material teeth 200 are installed as independent components within the yoke 100, which improves iron loss and increases the compressor's energy efficiency without altering the original stator 1000's external dimensions and installation method. Furthermore, the high utilization rate of the tooth 200's die arrangement helps reduce costs. Moreover, this embodiment meets the structural strength requirements of the stator 1000 and ensures smooth magnetic flux transmission between the yoke 100 and the teeth 200 when they are made of different materials.

[0091] Understandably, the compressor also includes a housing and a crankcase 2000. Multiple corners of the yoke 100 are provided with axially penetrating mounting holes 130. The stator 1000 is bolted through the mounting holes 130 and fixedly connected to the crankcase 2000. The bottom of the stator 1000 is connected to the bottom of the housing via a seat spring 3000. The yoke 100 is made of metal or other materials instead of amorphous materials, which effectively improves the structural strength of the mounting holes 130. Furthermore, the top of the stator 1000 is connected to the crankcase 2000, which also protects the amorphous material teeth 200, enhancing the stability of the stator 1000 installation. In addition, the stator lamination assembly at the bottom of the stator 1000 can further enhance the overall strength of the stator 1000, making the overall strength of the mounting hole 130 higher. It can also support and protect the amorphous material teeth 200. At the same time, it can better withstand the reaction force of the seat spring 3000, making the installation stability of the teeth 200 and yoke 100 higher, and further improving the stability of the compressor.

[0092] Since the compressor of this embodiment adopts all the technical solutions of the stator 1000 of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0093] Reference Figure 11 and Figure 13 As shown, a method for manufacturing a stator 1000 according to an embodiment of the present invention includes the following steps:

[0094] Step 1: Amorphous alloy strip is stamped into amorphous sheets;

[0095] Step 2: Stack and glue the amorphous laminations to form amorphous teeth;

[0096] Step 3: Stamp the silicon steel strip into the first yoke lamination and the second yoke lamination;

[0097] Step 4: Stack the first yoke stamping and the second yoke stamping in such a way that N first yoke stampings are stacked on top of one second yoke stamping to form a yoke stamping group; wherein, the thickness of the first yoke stamping is t, which satisfies: 1mm / t≤N≤15mm / t;

[0098] Step 5: Stamping silicon steel strip into stator laminations;

[0099] Step 6: Stack the stator laminations onto one end of the yoke lamination assembly;

[0100] Step 7: Install the amorphous teeth into the first groove of the yoke lamination assembly from top to bottom until they abut against the stator teeth of the stator lamination.

[0101] It should be noted that the stamping and assembly steps one through six can be adjusted according to the actual production line needs, and their specific order is not limited. Of course, those skilled in the art should know that the stamping step of the corresponding lamination must be before the stacking step. For the first yoke lamination 170, the second yoke lamination 180, and the stator lamination 300, rivet points 190 can be stamped simultaneously with the stamping process, so that they can be easily fixed during assembly, thereby improving assembly efficiency.

[0102] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A stator, characterized in that, include: The yoke is arranged in a ring shape and has an inner hole. The inner hole wall is provided with a plurality of first grooves at intervals along the circumference of the inner hole, and a first mounting part is provided in the first groove. Multiple teeth made of amorphous material are correspondingly installed in multiple first grooves. Each tooth includes a tooth shoe, a tooth body, and a second mounting part. A portion of the tooth body is located in the first groove. The tooth shoe is connected to the side of the tooth body near the center of the inner hole. The second mounting part is connected to two sidewalls of the tooth body along the circumferential direction. The second mounting part is connected to the first mounting part to restrict the tooth from disengaging from the yoke. The sidewall of the tooth body away from the toothed shoe is configured to abut against the bottom wall of the first groove; The first groove has two sidewalls arranged opposite each other along the circumference, which are a first sidewall and a second sidewall. The first sidewall and the second sidewall face the two sidewalls of the tooth body along the circumference, respectively. The first sidewall and the second sidewall are provided with a fixing mechanism, which is used to apply pressure to the sidewall of the tooth body. The fixing mechanism includes a second protrusion connected to the first sidewall and the second sidewall. The two second protrusions apply pressure to both sides of the tooth body by deformation. The first sidewall and the second sidewall are respectively provided with a second groove extending along the axial direction of the stator, and the second protrusion is provided on the bottom wall of the second groove and protrudes out of the groove opening of the second groove; The yoke includes a plurality of first yoke blanks and at least one second yoke blank, the plurality of first yoke blanks and at least one second yoke blank are stacked along the axial direction, and at least one first yoke blank is connected to each end of the second yoke blank along the axial direction. The first yoke punch has two oppositely arranged first notches at the first groove, and multiple first yoke punches are stacked so that the two first notches respectively form the second groove; the second yoke punch has two oppositely arranged second notches at the first groove, and the bottom wall of the two second notches is respectively provided with a first punch protrusion protruding toward the tooth body, and the two first punch protrusions can be bent along the axial direction and abut against the two side walls of the tooth body.

2. The stator according to claim 1, characterized in that: The first mounting portion includes a radial limiting groove, which is disposed on at least one of the two sidewalls of the first groove arranged opposite each other along the circumference. The second mounting portion includes a first protrusion disposed on the side of the tooth body away from the tooth shoe and protruding from at least one of the two sidewalls of the tooth body along the circumference. The first protrusion is positioned and connected to the radial limiting groove.

3. The stator according to claim 1, characterized in that: The second protrusion extends out of the opening of the second groove by a dimension of W1, where W1 is greater than or equal to 0.05 mm; and / or, The difference between the width of the first groove and the width of the tooth body is D, where D is greater than or equal to 0.05 mm and less than or equal to 0.1 mm; and / or, The minimum distance between the two second protrusions is W3, and the width of the tooth body is W4, satisfying: 0.0005 ≤ δ / W3 ≤ 0.0015, where δ = W4 - W3; and / or, At least one of the first sidewall and the second sidewall abuts against the sidewall of the tooth body.

4. The stator according to claim 1, characterized in that: The second yoke lamination has multiple parts, and N first yoke laminations are stacked between two adjacent second yoke laminations. The thickness of the first yoke lamination is t, which satisfies: 1mm / t≤N≤15mm / t.

5. The stator according to claim 1, characterized in that: The teeth are formed by stacking amorphous material sheets along the axial direction of the stator; and / or The yoke is formed by stacking metal sheets along the axial direction.

6. The stator according to claim 1, characterized in that: The first mounting portion includes a first concave-convex structure disposed on two sidewalls of the first groove arranged opposite each other along the circumference, and the second mounting portion includes a second concave-convex structure disposed on both sides of the tooth body along the circumference and cooperating with the first concave-convex structure.

7. The stator according to any one of claims 1 to 6, characterized in that: The stator further includes at least one stator lamination, which includes an integrally formed stator yoke portion and a stator tooth portion. The projected contour line of the stator lamination along the axial direction of the stator coincides with the projected contour line of the yoke portion and the tooth portion after assembly. The stator lamination is located at at least one end of the stator along the axial direction.

8. A compressor, characterized in that: It includes a rotor and a stator as described in any one of claims 1 to 7, wherein the rotor is rotatably disposed within the stator.

9. The compressor according to claim 8, characterized in that: The compressor also includes a housing and a crankcase. Multiple corners of the yoke are provided with mounting holes that extend through the axial direction of the stator. The stator is bolted through the mounting holes and fixedly connected to the crankcase. The bottom of the stator is connected to the bottom of the housing by a seat spring.

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