Stator assembly and compressor

Abstract

This invention discloses a stator assembly and compressor, solving the problem of short circuits between bridge wires affecting motor reliability. The stator assembly includes: a stator core; multiple sets of windings, all of which are disposed on the stator core and connected in series with bridge wires; and an insulating frame disposed on the stator body, with wire slots on the frame, each corresponding to a bridge wire; all wire slots are arranged sequentially away from the stator core. The stator assembly and compressor of this invention, by providing multiple wire slots, effectively separates the bridge wires, overcoming the problem in the prior art where the bridge wires are exposed and easily damaged by external impacts and scratches, ensuring that short circuits do not occur between the bridge wires, thus guaranteeing motor reliability.

Description

Technical Field

[0001] This invention relates to the field of drive structure technology, and more specifically, to a stator assembly and a compressor. Background Technology

[0002] Existing compressor permanent magnet synchronous motor insulation frames primarily use wire winding on the outer wall of the frame. While this method is convenient for both machine and manual winding, the crossover wires are exposed, making them susceptible to impact and scratches from external objects. Furthermore, the insulation between the three-phase crossover wires is incomplete; if the winding is too loose, the wires may become tangled and come into contact, significantly increasing the risk of short circuits, reducing product safety, and ultimately leading to poor insulation withstand voltage and decreased motor reliability. Summary of the Invention

[0003] This invention discloses a stator assembly and compressor that uses wire slots corresponding one-to-one with the bridge wires to separate all the bridge wires, thus solving the problem of short circuits between the bridge wires affecting the reliability of the motor.

[0004] This invention discloses a stator assembly, comprising:

[0005] Stator core;

[0006] Multiple sets of windings, all of which are disposed on the stator core, and the windings connected in series are connected by a bridging wire;

[0007] An insulating frame is disposed on the stator body, and the insulating frame is provided with a wire groove, the wire groove corresponding one-to-one with the bridge wire;

[0008] All the aforementioned wire guide slots are arranged sequentially in a direction away from the stator core.

[0009] The wire guide groove is provided with a wire lead-out outlet, and the bottom edge of the wire lead-out outlet is on the same plane as the bottom surface of the corresponding wire guide groove.

[0010] The relationship between the depth L1 of the cable groove and the diameter D1 of the bridging wire is: L1 > D1; and / or, the relationship between the width L2 of the cable groove and the diameter D1 of the bridging wire is: L2 > D1.

[0011] The insulating frame includes:

[0012] A first annular plate is disposed at the end of the stator core;

[0013] A winding support portion is disposed on the first annular plate, and the winding is wound around the winding support portion;

[0014] The wire groove is located on the side wall of the first annular plate away from the winding support.

[0015] The first annular plate has a star point receiving groove on its side away from the stator core, and the common end of all the windings is located in the star point receiving groove.

[0016] The relationship between the depth H1 of the star-shaped receiving groove and the diameter D2 of the common end is as follows: D2

[0017] The cable tray includes a U-phase cable tray, a V-phase cable tray, and a W-phase cable tray. The U-phase cable tray is located below the V-phase cable tray, and the W-phase cable tray is located above the V-phase cable tray.

[0018] The stator assembly also includes a frame cover plate, which is disposed on the insulating frame and is capable of closing all the wire passage slots.

[0019] The skeleton cover plate includes a second annular plate and a cover body. The second annular plate surrounds the side wall of the insulating skeleton, and the cover body is disposed at one end of the second annular plate, and the cover body can cover the end of the insulating skeleton away from the stator core.

[0020] The cover is provided with an oil return hole, and the oil return hole corresponds to the spacing between two adjacent windings.

[0021] The stator assembly also includes an oil baffle cap, the cover of which is provided with a clearance hole, and the oil baffle cap is positioned on the side of the clearance hole away from the stator core.

[0022] The oil baffle includes a third annular plate and a flow guide. The third annular plate is disposed on the cover, and the clearance hole is located inside the third annular plate. The flow guide is disposed on the end of the third annular plate away from the cover.

[0023] The cross-section of the fairing is triangular, and the angle range of the base angle θ of the triangle is: 15°≤θ≤30°.

[0024] An oil baffle is provided at the edge of the clearance hole, and an oil baffle groove is formed between the third annular plate and the oil baffle. An oil passage hole is provided on the third annular plate, and the oil baffle groove is connected to the oil return hole through the oil passage hole.

[0025] ​The relationship between the height H4 of the oil baffle cap and the height H5 of the oil baffle plate is: 1 / 2H5≤H4≤H5; and / or, the relationship between the height H5 of the oil baffle plate and the height H6 of the oil passage hole is: 1 / 3H6≤H5≤2 / 3H6.

[0026] Another aspect of the present invention provides a compressor including the stator assembly described above.

[0027] The stator assembly and compressor of this invention, by setting multiple wire guide slots, ensures that each slot corresponds one-to-one with a bridge wire, thereby effectively separating the bridge wires. This overcomes the problem in existing technologies where the bridge wires are exposed and easily damaged by external objects, ensuring that short circuits do not occur between the bridge wires and thus guaranteeing the reliability of the motor. Furthermore, all wire guide slots are arranged sequentially in a direction away from the stator core, creating a height difference between the bridge wires within the slots, further preventing contact short circuits between the bridge wires and further ensuring the reliability of the motor. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the stator assembly according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the insulating frame according to an embodiment of the present invention;

[0030] Figure 3 This is a top view of the insulating frame and winding according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the lead-in outlet according to an embodiment of the present invention;

[0032] Figure 5 This is a cross-sectional view of the insulating frame and the bridging wire according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the wire channel and wire lead-out outlet according to an embodiment of the present invention;

[0034] Figure 7 This is a cross-sectional view of the skeleton cover plate according to an embodiment of the present invention;

[0035] Figure 8 yes Figure 7 A partial schematic diagram of point A;

[0036] Figure 9 This is a schematic diagram of the skeleton cover plate according to an embodiment of the present invention;

[0037] Figure 10 This is a half-sectional view of the skeleton cover plate according to an embodiment of the present invention;

[0038] Legend: 1. Stator core; 2. Winding; 3. Bridge wire; 4. Insulating frame; 41. Wire groove; 411. Wire lead-out outlet; 42. First annular plate; 43. Winding support; 44. Star point receiving groove; 5. Common end; 6. Frame cover plate; 61. Second annular plate; 62. Cover body; 63. Oil return hole; 64. Clearance hole; 7. Oil baffle cap; 71. Third annular plate; 72. Flow guide; 65. Oil baffle plate; 73. Oil baffle groove; 74. Oil passage hole. Detailed Implementation

[0039] The present invention will be further described below with reference to embodiments, but is not limited to the contents of the specification.

[0040] This invention discloses a method such as Figures 1 to 10 The stator assembly shown includes: a stator core 1; multiple sets of windings 2, all of which are mounted on the stator core 1 and connected in series with bridging wires 3; and an insulating frame 4, which is mounted on the stator body and has wire slots 41 corresponding to the bridging wires 3. All wire slots 41 are arranged sequentially away from the stator core 1. By providing multiple wire slots 41, each corresponding to a bridging wire 3, the bridging wires 3 are effectively separated, overcoming the problem in the prior art where the bridging wires 3 are exposed and easily damaged by external objects. This ensures that short circuits do not occur between the bridging wires 3, thus guaranteeing the reliability of the motor. Furthermore, the sequential arrangement of all wire slots 41 away from the stator core 1 creates a height difference between the bridging wires 3 within the slots 41, further preventing short circuits and ensuring the reliability of the motor.

[0041] The insulating frame 4 is provided with a first snap-fit ​​structure, and the insulating frame 4 is snap-fitted with the stator core 1 through the first snap-fit ​​structure.

[0042] Since the bridging wire 3 needs to connect to the corresponding winding 2, it needs to pass through the wire guide slot 41. Therefore, the wire guide slot 41 is provided with a wire lead-out port 411. The bridging wire 3 can pass through the corresponding wire lead-out port 411 to connect to the winding 2. Furthermore, to prevent the bridging wire 3 from contacting other bridging wires 3 in the wire guide slot 41 when it exits, the bottom edge of the wire lead-out port 411 is on the same plane as the bottom surface of the corresponding wire guide slot 41. Due to the height difference between the wire guide slots 41, the bridging wire 3 will contact the bottom edge of the wire lead-out port 411 when it exits, thus avoiding contact with the bridging wires 3 below it due to gravity. This further ensures the relative separation between the bridging wires 3 and guarantees the reliability of the motor.

[0043] The relationship between the depth L1 of the cable guide groove 41 and the diameter D1 of the bridging cable 3 is: L1 > D1. This ensures that the bridging cable 3 will not protrude from the cable guide groove 41 when placed inside it, thus avoiding the problem of the bridging cable 3 being damaged by collisions and wear due to protrusion from the cable guide groove 41, and ensuring the structural reliability of the bridging cable 3.

[0044] Similarly, the relationship between the width L2 of the wire groove 41 and the diameter D1 of the bridge wire 3 is: L2 > D1. This ensures that the bridge wire 3 will not protrude from the wire groove 41 when it is placed inside the wire groove 41, thus avoiding the problem of the bridge wire 3 being damaged by collision due to protrusion from the wire groove 41, and ensuring the structural reliability of the bridge wire 3.

[0045] In one embodiment, the insulating frame 4 includes: a first annular plate 42 disposed at the end of the stator core 1; a winding support portion 43 disposed on the first annular plate 42, and the winding 2 wound around the winding support portion 43; and a wire groove 41 disposed on the side wall of the first annular plate 42 away from the winding support portion 43. Since the end face of the stator core 1 is circular, and the bridging wires 3 between the windings 2 exist within the entire circle, a first annular plate 42 is provided to cover the end face of the stator core 1, and a wire groove 41 is provided on the first annular plate 42, so that the shape of the wire groove 41 is annular, which can completely protect the bridging wires 3 with an annular structure. Only the wire lead-out outlet 411 needs to be provided at the required position, ensuring that the bridging wires 3 will not come into contact with each other and short-circuit at any position at the end of the stator core 1, and that there will be no problem of some bridging wires 3 being worn and damaged because they are not in the wire groove 41, thus fully protecting the reliability of the bridging wires 3. Furthermore, the winding support part 43 is provided so that the winding 2 can be wound on the winding support part 43 and the stator core 1. The bridge wire 3 can be directly connected to the corresponding winding 2 on the side of the winding support part 43 away from the stator core 1, which reduces the length and bending degree of the bridge wire 3, avoids problems such as entanglement between bridge wires 3, and effectively improves the reliability of the bridge wire 3.

[0046] In addition, at present, most treatments for the common end of the winding 2 are to fit it with an insulating sleeve and then directly insert it into the winding slot. This method may scratch the enameled wire in the slot, and the insulating sleeve is also prone to falling off, which increases the short-circuit risk of the motor, reduces product safety, and further leads to problems such as poor insulation voltage resistance and reduced motor reliability. To this end, a star point receiving groove 44 is provided on the side of the first annular plate 42 facing away from the stator core 1, and the common ends 5 of all the windings 2 are arranged in the star point receiving groove 44. The star point receiving groove 44 for receiving the common end 5 is separately provided on the insulating frame 4, which avoids the problems of damage to the common end 5 or falling off of the insulating sleeve caused by arranging the common end 5 in the winding slot in the prior art, prevents the occurrence of short circuits and other situations between the common end 5 and the winding 2 or the crossover wire 3, and ensures the reliability of the motor.

[0047] The relationship between the depth H1 of the star point receiving groove 44 and the diameter D2 of the common end 5 is: D2<H1<2D2. In this case, the star point receiving groove 44 can completely receive the common end 5, ensuring that the common end 5 does not protrude out of the star point receiving groove 44, thereby maximally avoiding the problems of damage to the common end 5 or falling off of the insulating sleeve caused by arranging the common end 5 in the winding slot in the prior art, preventing the occurrence of short circuits and other situations between the common end 5 and the winding 2 or the crossover wire 3, and ensuring the reliability of the motor.

[0048] Similarly, the relationship between the width L3 of the star point receiving groove 44 and the diameter D2 of the common end 5 is: D2<L3<2D2. In this case, the star point receiving groove 44 can completely receive the common end 5, ensuring that the common end 5 does not protrude out of the star point receiving groove 44, thereby maximally avoiding the problems of damage to the common end 5 or falling off of the insulating sleeve caused by arranging the common end 5 in the winding slot in the prior art, preventing the occurrence of short circuits and other situations between the common end 5 and the winding 2 or the crossover wire 3, and ensuring the reliability of the motor.

[0049] As shown in the figure, the stator assembly is a three-phase stator assembly, including a U-phase bridging line, a V-phase bridging line, and a W-phase bridging line, as well as nine windings 2 numbered 1 to 9. Windings 2 numbered 1, 4, and 7 are connected in series via the U-phase bridging line, windings 2, 5, and 8 are connected in series via the V-phase bridging line, and windings 2 numbered 3, 6, and 9 are connected in series via the W-phase bridging line. At this time, the wire slot 41 includes a U-phase wire slot, a V-phase wire slot, and a W-phase wire slot. The U-phase wire slot is located below the V-phase wire slot, and the W-phase wire slot is located above the V-phase wire slot. The U-phase cable tray is used to accommodate the U-phase bridging wire, the V-phase cable tray is used to accommodate the V-phase bridging wire, and the W-phase cable tray is used to accommodate the W-phase bridging wire. In the diagram, between adjacent windings 2 (between windings 1 and 2, between windings 2 and 3, etc.), each of the U-phase, V-phase, and W-phase cable trays has a cable lead-out 411. Furthermore, between windings 1 and 2, the U-phase bridging wire connected to winding 1 passes through the cable lead-out of the U-phase cable tray. 411 extends out of the U-phase wire slot, and the lead-in outlet 411 of the V-phase bridge wire connected to winding 2 extends out of the V-phase wire slot. Due to the height difference between the U-phase wire slot and the V-phase wire slot, there is also a height difference between the lead-in outlet 411 of the U-phase wire slot and the lead-in outlet 411 of the V-phase bridge wire. This height difference between the U-phase bridge wire and the V-phase bridge wire avoids contact between the U-phase bridge wire and the V-phase bridge wire, ensuring the reliability of the stator assembly and the motor.

[0050] To further protect the bridge wire 3 and prevent it from coming out of the wire slot 41, the stator assembly also includes a frame cover plate 6. The frame cover plate 6 is disposed on the insulating frame 4 and can close all the wire slots 41. By using the frame cover plate 6 to close the openings of the wire slots 41, the bridge wire 3 is further prevented from coming out of the wire slots 41, ensuring the reliability of the bridge wire 3. The frame cover plate 6 is provided with a snap-fit ​​groove, and the insulating frame is provided with a second snap-fit ​​member, which engages with the snap-fit ​​groove.

[0051] As shown in the figure, the opening of the wire passage 41 faces the side wall of the first annular plate 42 away from the winding support portion 43. Therefore, the skeleton cover plate 6 includes a second annular plate 61 and a cover 62. The second annular plate 61 surrounds the side wall of the insulating skeleton 4, and the cover 62 is disposed at one end of the second annular plate 61, and the cover 62 can cover the end of the insulating skeleton 4 away from the stator core 1. By using the second annular plate 61 to surround the first annular plate 42, the side of the first annular plate 42 away from the winding support portion 43 is closed, thereby closing the opening of the wire passage 41 and achieving the purpose of further protecting the bridge wire 3.

[0052] When the motor housing the stator assembly is used in a compressor, the motor rotor carries lubricating oil from the bottom of the compressor to the top during operation. The oil returns slowly from the top, resulting in reduced lubrication in the lower half of the compressor. Since the components requiring lubrication are mainly concentrated in the lower half, this affects lubrication efficiency. Therefore, the cover 62 is provided with an oil return hole 63, the spacing of which corresponds to the distance between two adjacent windings 2. The oil return hole 63 allows the lubricating oil flowing to the top of the compressor to flow directly back to the bottom of the compressor via the motor, thus ensuring the reliable operation of the compressor housing the motor.

[0053] Since the rotor and shaft need to be installed in the middle of the stator assembly, and the length of the shaft is greater than the size of the stator assembly, it may protrude from the end of the stator core 1 where the skeleton cover plate 6 is located. Therefore, the cover 62 is provided with a clearance hole 64 to allow the shaft to pass, ensuring reliable installation of the shaft. Simultaneously, to prevent the compressor's lubricating oil from flowing to the location where the stator assembly and rotor meet, the stator assembly also includes an oil baffle cap 7, which covers the side of the clearance hole 64 away from the stator core 1. The distance between the oil baffle cap 7 and the cover 62 creates clearance space for the shaft, while the oil baffle cap 7 also ensures that the cover 62 blocks the lubricating oil, preventing the compressor's lubricating oil from flowing to the location where the stator assembly and rotor meet, thus ensuring reliable motor operation.

[0054] Specifically, the oil baffle 7 includes a third annular plate 71 and a flow guide 72. The third annular plate 71 is disposed on the cover 62, and the clearance hole 64 is located inside the third annular plate 71. The flow guide 72 covers the end of the third annular plate 71 away from the cover 62. By utilizing the connection between the third annular plate 71 and the cover 62, and by placing the flow guide 72 on the third annular plate 71, the third annular plate 71 can effectively increase the distance between the flow guide 72 and the cover 62, thereby increasing the size of the clearance space formed to avoid the rotating shaft. The flow guide 72 can also reliably shield the clearance hole 64 to prevent lubricating oil from entering the mating position of the stator assembly and the rotor, ensuring the reliability of the motor and compressor. It can also effectively and quickly return the lubricating oil carried by the rotor to the bottom of the compressor, avoiding the risk of reduced lubrication effect due to slow oil return.

[0055] Preferably, the cross-section of the guide shield 72 is triangular. Lubricating oil dripping onto the guide shield 72 can flow downwards along the hypotenuse of the triangle, thus smoothly guiding the lubricating oil outside the range of the clearance hole 64, further ensuring the reliable operation of the motor. Preferably, the base angle θ of the triangle is in the range of 15°≤θ≤30°. This allows for the reduction of the height of the guide shield 72 while ensuring smooth lubricating oil flow, thereby reducing the axial dimension of the stator assembly and improving the applicability of the stator assembly and the motor.

[0056] An oil baffle plate 65 is provided at the edge of the clearance hole 64. The oil baffle plate 65 prevents lubricating oil flowing onto the cover plate from flowing into the clearance hole 64 through its edge. The oil baffle plate 65 blocks the flow path of the lubricating oil. To facilitate the installation of the third annular plate 71, the third annular plate 71 and the oil baffle plate 65 are separately installed, forming an oil baffle groove 73 between them. The third annular plate 71 has an oil passage hole 74, and the oil baffle groove 73 communicates with the oil return hole 63 through the oil passage hole 74. The lubricating oil flowing into the oil baffle groove 73 can be collected, further preventing the lubricating oil from flowing through the clearance hole 64. Moreover, the oil passage hole 74 allows the lubricating oil to flow into the oil return hole 63, further ensuring smooth oil return.

[0057] The relationship between the height H4 of the oil baffle cap 7 and the height H5 of the oil baffle plate 65 is: 1 / 2H5≤H4≤H5, which avoids the overall height of the frame cover plate 6 being too high, thus causing the stator assembly to occupy too much space and improving the applicability of the stator assembly and the motor.

[0058] The relationship between the height H5 of the oil baffle plate 65 and the height H6 of the oil passage hole 74 is 1 / 3H6≤H5≤2 / 3H6, which ensures that the oil droplets will not overflow from the oil baffle plate 65 during the downward process, and further ensures reliable oil return.

[0059] The shape of the oil return hole 63 can be the same as the shape of the winding groove of the stator core 1, or it can be round, square, or other shapes.

[0060] Another aspect of the present invention provides a compressor including the stator assembly described above.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all embodiments here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A stator assembly, characterized in that, comprising: a stator core (1); a plurality of sets of windings (2), all of said windings (2) being arranged on said stator core (1), and jumper wires (3) being connected between said windings (2) connected in series with each other; an insulating frame (4), said insulating frame (4) being arranged on the stator body, and said insulating frame (4) being provided with wire passing grooves (41), said wire passing grooves (41) being in one-to-one correspondence with said jumper wires (3); all of said wire passing grooves (41) are sequentially arranged in a direction away from said stator core (1); said stator assembly further comprises a frame cover plate (6), said frame cover plate (6) is arranged on said insulating frame (4), and said frame cover plate (6) is capable of enclosing all of said wire passing grooves (41); said frame cover plate (6) comprises a second annular plate (61) and a cover body (62), said second annular plate (61) surrounds the side wall of said insulating frame (4), said cover body (62) is arranged at one end of said second annular plate (61), and said cover body (62) is capable of shielding the end of said insulating frame (4) that is away from said stator core (1).

2. The stator assembly according to claim 1, characterized in that, A wire passing outlet (411) is provided on said wire passing groove (41), and the bottom edge of said wire passing outlet (411) is on the same plane as the bottom surface of the corresponding said wire passing groove (41).

3. The stator assembly according to claim 1, characterized in that, The relationship between the depth L1 of said wire passing groove (41) and the diameter D1 of said jumper wire (3) is: L1>D1; and / or, the relationship between the width L2 of said wire passing groove (41) and the diameter D1 of said jumper wire (3) is: L2>D1.

4. The stator assembly according to claim 1, characterized in that, Said insulating frame (4) comprises: a first annular plate (42), said first annular plate (42) being arranged at the end of said stator core (1); a winding support portion (43), said winding support portion (43) being arranged on said first annular plate (42), and said winding (2) being wound on said winding support portion (43); Said wire passing groove (41) is arranged on the side wall of said first annular plate (42) that is away from said winding support portion (43).

5. The stator assembly according to claim 4, characterized in that, A star point receiving groove (44) is provided on the side surface of said first annular plate (42) that is away from said stator core (1), and the common ends (5) of all said windings (2) are arranged in said star point receiving groove (44).

6. The stator assembly according to claim 5, characterized in that, The relationship between the depth H1 of said star point receiving groove (44) and the diameter D2 of said common end (5) is: D2<H1<2D2; and / or, the relationship between the width L3 of said star point receiving groove (44) and the diameter D2 of said common end (5) is: D2<L3<2D2.

7. The stator assembly according to claim 1, characterized in that, Said wire passing grooves (41) comprise a U-phase wire passing groove, a V-phase wire passing groove and a W-phase wire passing groove, said U-phase wire passing groove is located below said V-phase wire passing groove, and said W-phase wire passing groove is located above said V-phase wire passing groove.

8. The stator assembly according to claim 1, characterized in that, An oil return hole (63) is provided on said cover body (62), and said oil return hole (63) corresponds to the spacing between two adjacent said windings (2).

9. The stator assembly according to claim 8, characterized in that, The stator assembly also includes an oil baffle cap (7), and the cover (62) is provided with a clearance hole (64). The oil baffle cap (7) covers the side of the clearance hole (64) away from the stator core (1).

10. The stator assembly according to claim 9, characterized in that, The oil baffle cap (7) includes a third annular plate (71) and a flow guide (72). The third annular plate (71) is disposed on the cover (62), and the clearance hole (64) is located inside the third annular plate (71). The flow guide (72) covers the end of the third annular plate (71) away from the cover (62).

11. The stator assembly according to claim 10, characterized in that, The cross-section of the fairing (72) is triangular, and the angle range of the base angle θ of the triangle is: 15°≤θ≤30°.

12. The stator assembly according to claim 10, characterized in that, An oil baffle plate (65) is provided at the edge of the clearance hole (64), and an oil baffle groove (73) is formed between the third annular plate (71) and the oil baffle plate (65). An oil passage hole (74) is provided on the third annular plate (71), and the oil baffle groove (73) is connected to the oil return hole (63) through the oil passage hole (74).

13. The stator assembly according to claim 12, characterized in that, The relationship between the height H4 of the oil baffle cap (7) and the height H5 of the oil baffle plate (65) is: 1 / 2H5≤H4≤H5; and / or, the relationship between the height H5 of the oil baffle plate (65) and the height H6 of the oil passage hole (74) is: 1 / 3H6≤H5≤2 / 3H6.

14. A compressor, characterized in that: Includes the stator assembly according to any one of claims 1 to 13.

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