Line stator, motor winding cooling structure and motor

Abstract

The present invention discloses a stator, a motor winding cooling structure and a motor, which relates to the technical field of motors, and comprises an insulating frame, wherein the insulating frame is formed by splicing and enclosing a plurality of frame units, wherein one side of the frame unit has a concave portion, and the other side has a convex portion matched with the concave portion, and the insulating frame is formed by staggered overlapping of the concave portion and the convex portion. The staggered overlapping of the concave portion and the convex portion of the insulating frame avoids oil leakage at the splicing point, and also solves the problem of uneven splicing between the frame units.

Description

Technical Field

[0001] The present invention relates to the technical field of motor winding structures, and in particular to a wire stator, a motor winding cooling structure and a motor. Background Art

[0002] The motor works by generating a magnetic field through the windings. The damage caused by the heating of the windings is even greater than that of mechanical wear. Oil cooling, as an efficient cooling method, has gradually become the main development direction of motor cooling. The stator is composed of multiple stator units. When cooling oil is passed into the windings, the cooling oil can easily flow out from the gaps at the joints, affecting the cooling effect. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] In order to solve the technical problem that cooling oil easily flows out from the gaps at the joints, the present invention provides a stator, a motor winding cooling structure and a motor, which avoids oil leakage at the joints by staggered overlapping of concave parts and convex parts.

[0005] 2. Technical solution

[0006] To solve the above problems, the technical solution provided by the present invention is: a wire stator, including an insulating frame, which is formed by splicing and surrounding a plurality of frame units, one side of the frame unit has a recess, and the other side has a protrusion matching the recess, and the insulating frame is formed by staggered overlapping of the recess and the protrusion.

[0007] The concave and convex parts of the insulating frame are overlapped alternately, which avoids oil leakage at the joints and solves the problem of uneven joints between frame units.

[0008] Optionally, the skeleton unit includes a first plate and a second plate, the first plate and the second plate are arranged in parallel, the first plates are spliced ​​together to form an outer circumference of the insulating skeleton, the second plates are spliced ​​together to form an inner circumference of the insulating skeleton, one side of the second plate has a recess, and the other side has a convex portion that cooperates with the recess, and the inner circumference is formed by staggered overlapping of the recess and the convex portion.

[0009] Optionally, it further includes a winding, wherein a support plate is provided between the first plate and the second plate, and the winding is formed by winding enameled wire on the support plate.

[0010] Optionally, it also includes an iron core, and the insulating frame is arranged between the iron core and the winding.

[0011] The present invention also discloses a motor winding cooling structure, comprising a shell, a first sealing cover, and a second sealing cover, wherein the shell is provided with an oil inlet, and the wire stator, the first sealing cover and the second sealing cover mentioned above are all arranged in the shell; a gap is axially provided inside the wire stator for cooling oil to flow; the first sealing cover and the second sealing cover are respectively connected at two axial ends of the wire stator; the first sealing cover is provided with a plurality of first slots for cooling oil to flow in; the second sealing cover is provided with a plurality of second slots for cooling oil to flow out, and the diameter of the second slots is smaller than the diameter of the first slots.

[0012] Optionally, the first sealing cover includes a first body, the first body is vertically provided with a first baffle and a second baffle, the first baffle is distributed along the outer circumferential edge of the first body, the second baffle is distributed along the inner circumferential edge of the first body, and the first slot is arranged on the first baffle; the second sealing cover includes a second body, the second body is vertically provided with a third baffle and a fourth baffle, the third baffle is distributed along the outer circumferential edge of the second body, the fourth baffle is distributed along the inner circumferential edge of the second body, and the second slot is arranged on the second body.

[0013] Optionally, both axial ends of the linear stator are provided with limit blocks, the first baffle plate and the second baffle plate are provided with limit holes matching with the limit blocks, and the third baffle plate and the fourth baffle plate are provided with limit holes matching with the limit blocks.

[0014] Optionally, an oil outlet is provided at the bottom of the shell, and the oil outlet is used to connect to a cooling box.

[0015] Optionally, a first end cover is disposed on the outer side of the first sealing cover, and a second end cover is disposed on the outer side of the second sealing cover, and the first end cover and the second end cover are respectively connected to two ends of the shell.

[0016] The present invention further discloses a motor, comprising a rotating shaft, a rotor sleeved on the rotating shaft, and the motor winding cooling structure mentioned above, wherein the rotating shaft passes through the center position of the housing.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] (1) In the wire stator proposed in the embodiment of the present application, the concave and convex parts of the insulating frame are overlapped in an alternating manner, thereby avoiding oil leakage at the joints and solving the problem of uneven joints between frame units.

[0020] (2) In the motor winding cooling structure proposed in the embodiment of the present application, the cooling oil enters the interior of the shell through the oil inlet of the shell, flows through the outer surface of the stator, enters the stator through the first slot on the first sealing cover, passes axially through the stator through the gap inside the stator to reach the second sealing cover, and gradually flows out from the second slot of the second sealing cover. Since the diameter of the second slot is smaller than the diameter of the first slot, the inflow rate of the cooling oil is much greater than the outflow rate, so that the cooling oil gradually fills the entire internal space of the stator, and has a good cooling effect on the outer surface and the interior of the stator. Since the concave and convex parts of the insulating frame of the stator are staggered and overlapped, oil leakage at the joints is avoided, and quality problems such as uneven joints are also solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a wire stator proposed in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of the insulation frame of the wire stator proposed in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a skeleton unit of a wire stator proposed in an embodiment of the present invention;

[0024] Figure 4 An exploded diagram of a motor winding cooling structure proposed in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of a motor proposed in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0028] Example 1

[0029] Combined with Figure 1-5 The wire stator of this embodiment includes an insulating frame 21, which is formed by splicing and enclosing a plurality of frame units 211. One side of the frame unit 211 has a concave portion 2111, and the other side has a convex portion 2112 that matches the concave portion 2111. The insulating frame 21 is formed by staggered overlap of the concave portions 2111 and the convex portions 2112. The staggered overlap of the concave portions 2111 and the convex portions 2112 of the insulating frame 21 avoids oil leakage at the splicing, and also solves the problem of uneven splicing between the frame units 211.

[0030] Example 2

[0031] Combined with Figure 1-5Compared with the technical solution of Example 1, the wire stator of this embodiment can be improved as follows: the skeleton unit 211 includes a first plate 2113 and a second plate 2114, the first plate 2113 and the second plate 2114 are arranged in parallel, the first plate 2113 is spliced ​​to form the outer circumference of the insulating skeleton 21, the second plate 2114 is spliced ​​to form the inner circumference of the insulating skeleton 21, one side of the second plate 2114 has a recess 2111, and the other side has a protrusion 2112 matched with the recess 2111, and the inner circumference is formed by the staggered overlap of the recess 2111 and the protrusion 2112. The cooling oil is gathered to the inner circumference of the insulating skeleton 21 under the action of gravity. The second plate 2114 includes a first surface 21141 and a second surface 21142 which are arranged parallel to and staggered with the first surface 21141. The first surface 21141 is connected to the support plate 2115. A first side plate 21143 and a second side plate 21144 are provided between the first surface 21141 and the second surface 21142. One end of the first side plate 21143 is connected to the first surface 21141, and the other end is bent toward the direction of the second surface 21142 and connected to the second surface 21142, and a concave portion 2111 is formed with the first surface 21141 at the bending point. The second side plate 21144 is connected to the second surface 21142 at one end, and the other end is bent toward the direction of the first surface 21141 and connected to the first surface 21141, and a convex portion 2112 is formed with the second surface 21142 at the bending point. The concave portion 2111 and the convex portion 2112 of the second plate 2114 are overlapped in an alternating manner, thereby avoiding oil leakage at the joint, which would affect the cooling effect of the cooling oil on the winding 22 wound on the skeleton unit 211, and also solve the problem of uneven joints between the second plates 2114. In other embodiments, a concave portion 2111 may be provided on one side of the first plate 2113, and a convex portion 2112 cooperating with the concave portion 2111 may be provided on the other side, and the outer circumference is formed by the alternating overlap of the concave portion 2111 and the convex portion 2112, thereby solving the problem of oil leakage due to loose joints between the first plates 2113, which would affect the cooling effect of the cooling oil on the winding 22 wound on the skeleton unit 211, and also solve the problem of uneven joints between the first plates 2113.

[0032] Example 3

[0033] Combined with Figure 1-5 Compared with the technical solutions of Embodiment 1 or 2, the stator of the present embodiment can be improved as follows: it also includes a winding 22, a support plate 2115 is provided between the first plate 2113 and the second plate 2114, and the winding 22 is formed by winding an enameled wire 221 on the support plate 2115. The enameled wire 221 is wound on the support plate 2115, which greatly increases the actual length of the enameled wire, so that the winding 22 can generate a stronger electromagnetic field.

[0034] Example 4

[0035] Combined with Figure 1-5 The stator of this embodiment can be improved as follows compared with any one of the technical solutions of embodiments 1-3: it includes an iron core 23, and the insulating frame 21 is arranged between the iron core 23 and the winding 22. The insulating frame 21 ensures good insulation between the winding 22 and the iron core 23 to avoid short circuit.

[0036] Example 5

[0037] Combined with Figure 1-5 The motor winding cooling structure of this embodiment includes a shell 1, a first sealing cover 3, and a second sealing cover 4, wherein the shell 1 is provided with an oil inlet, and the wire stator 2, the first sealing cover 3 and the second sealing cover 4 described in any technical solution of embodiments 1 to 4 are all arranged in the shell 1; the wire stator 2 is provided with a gap 21 for cooling oil to flow along the axial direction; the first sealing cover 3 and the second sealing cover 4 are respectively connected at two axial ends of the wire stator 2; the first sealing cover 3 is provided with a plurality of first slots 313 for cooling oil to flow in; the second sealing cover 4 is provided with a plurality of second slots 413 for cooling oil to flow out, and the diameter of the second slot 413 is smaller than the diameter of the first slot 313. The cooling oil enters the interior of the housing 1 through the oil inlet 11 of the housing 1, flows through the outer surface of the stator 2, enters the stator 2 through the first slot 313 on the first sealing cover 3, passes through the stator 2 axially from the gap 21 inside the stator 2 to reach the second sealing cover 4, and gradually flows out from the second slot 413 of the second sealing cover 4. Since the diameter of the second slot 413 is smaller than the diameter of the first slot 313, the inflow rate of the cooling oil is much greater than the outflow rate, so that the cooling oil gradually fills the entire internal space of the stator 2, and has a good cooling effect on the outer surface and the interior of the stator 2. Since the concave portion 2111 and the convex portion 2112 of the insulating frame 21 of the stator 2 are staggered and overlapped, oil leakage at the joint is avoided, and quality problems such as uneven joints are also solved.

[0038] Example 6

[0039] Combined with Figure 1-5Compared with the technical solution of embodiment 5, the motor winding cooling structure of this embodiment can be improved as follows: the first sealing cover 3 includes a first body 31, the first body 31 is vertically provided with a first baffle 311 and a second baffle 312, the first baffle 311 is distributed along the outer circumferential edge of the first body 31, the second baffle 312 is distributed along the inner circumferential edge of the first body 31, and the first slot 313 is arranged on the first baffle 311; the second sealing cover 4 includes a second body 41, the second body 41 is vertically provided with a third baffle 411 and a fourth baffle 412, the third baffle 411 is distributed along the outer circumferential edge of the second body 41, the fourth baffle 412 is distributed along the inner circumferential edge of the second body 41, and the second slot 413 is arranged on the second body 41. The first baffle 311 and the second baffle 312 prevent the cooling oil from leaking toward the outer side wall of the first sealing cover 3, and the third baffle 411 and the fourth baffle 412 prevent the cooling oil from leaking toward the outer side wall of the second sealing cover 4.

[0040] Example 7

[0041] Combined with Figure 1-5 Compared with the technical solutions of Embodiment 5 or 6, the motor winding cooling structure of this embodiment can be improved as follows: both axial ends of the line stator 2 are provided with limit blocks 224, the first baffle 311 and the second baffle 312 are provided with limit holes 314 matched with the limit blocks 224, and the third baffle 411 and the fourth baffle 412 are provided with limit holes 314 matched with the limit blocks 224. The first baffle 311 and the third baffle fasten the first sealing cover 3 and the second sealing cover 4 to the outer circumference of the line stator 2, and the second baffle 312 and the fourth baffle fasten the first sealing cover 3 and the second sealing cover 4 to the inner circumference of the line stator 2, so as to achieve the effect of sealing the line stator 2.

[0042] Example 8

[0043] Combined with Figure 1-5 Compared with any one of the technical solutions of embodiments 5-7, the motor winding cooling structure of this embodiment can be improved as follows: the bottom of the housing 1 is provided with an oil outlet 12, and the oil outlet 12 is used to connect to a cooling box. The cooling oil flows out from the second slot 413, and is collected at the bottom of the housing 1 under the action of gravity, and then returns to the cooling box for loading the cooling oil through the oil outlet 12.

[0044] Example 9

[0045] Combined with Figure 1-5Compared with any one of the technical solutions in Embodiments 5-8, the motor winding cooling structure of this embodiment can be improved as follows: a first end cover 5 is provided on the outside of the first sealing cover 3, a second end cover 6 is provided on the outside of the second sealing cover 4, and the first end cover 5 and the second end cover 6 are respectively connected to the two ends of the housing 1. The first end cover 5, the second end cover 6 and the housing 1 form a closed cavity, which protects the first sealing cover 3, the second sealing cover 4 and the stator 2 inside to prevent them from being damaged by the external environment.

[0046] Example 10

[0047] Combined with Figure 1-5 The motor of this embodiment comprises a rotating shaft (not marked in the figure), a rotor (not marked in the figure) sleeved on the rotating shaft (not marked in the figure), and a motor winding cooling structure according to any one of claims 5 to 9, wherein the rotating shaft (not marked in the figure) passes through the center of the housing 1. After the winding 223 is energized, the stator 2 generates a rotating magnetic field, and the rotor (not marked in the figure) cuts the rotating magnetic field to generate an induced electromotive force and current, and forms an electromagnetic torque to rotate the rotating shaft (not marked in the figure) to output torque. The cooling oil enters the interior of the housing 1 through the oil inlet 11 of the housing 1, flows through the outer surface of the stator 2, enters the stator 2 through the first slot 313 on the first sealing cover 3, passes through the stator 2 axially from the gap 21 inside the stator 2 to reach the second sealing cover 4, and gradually flows out from the second slot 413 of the second sealing cover 4. Since the diameter of the second slot 413 is smaller than the diameter of the first slot 313, the inflow rate of the cooling oil is much greater than the outflow rate, so that the cooling oil gradually fills the entire internal space of the stator 2, and has a good cooling effect on the outer surface and the interior of the stator 2. Since the concave portion 2111 and the convex portion 2112 of the insulating frame 21 of the stator 2 are staggered and overlapped, oil leakage at the joint is avoided, and quality problems such as uneven joints are also solved. The cooling oil circuit is composed of the oil inlet 11, the first slot 313, the gap 21, the second slot 413 and the oil outlet 12, which can simultaneously cool the outer surface (i.e., the iron core 23) and the interior (winding 22) of the stator 2 without the need for additional oil circuits, making the internal structure of the motor compact and small in size. The good cooling effect prevents the motor from being damaged by high temperature, greatly improving the performance and working efficiency of the motor.

[0048] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A motor winding cooling structure, characterized in that: It includes a housing, a first sealing cover, a second sealing cover, and a stator, wherein: The housing is provided with an oil inlet, and the stator, the first sealing cover and the second sealing cover are all arranged in the housing; A gap is provided inside the stator along the axial direction for cooling oil to flow; The two axial ends of the stator are respectively connected to a first sealing cover and a second sealing cover; The first sealing cover is provided with a plurality of first slots for cooling oil to flow into; The second sealing cover is provided with a plurality of second slots for cooling oil to flow out, and the diameter of the second slots is smaller than the diameter of the first slots; The first sealing cover comprises a first body, the first body is vertically provided with a first baffle and a second baffle, the first baffle is distributed along the outer circumferential edge of the first body, the second baffle is distributed along the inner circumferential edge of the first body, and the first slot is provided on the first baffle; The second sealing cover comprises a second body, the second body is vertically provided with a third baffle and a fourth baffle, the third baffle is distributed along the outer circumferential edge of the second body, the fourth baffle is distributed along the inner circumferential edge of the second body, and the second slot is provided on the second body; The wire stator comprises an insulating frame, which is formed by splicing and enclosing a plurality of frame units, one side of the frame unit has a concave portion, and the other side has a convex portion matched with the concave portion, and the insulating frame is formed by staggered overlapping of the concave portion and the convex portion; The skeleton unit includes a first plate and a second plate, the first plate and the second plate are arranged in parallel, the first plate is spliced ​​together to form the outer circumference of the insulating skeleton, the second plate is spliced ​​together to form the inner circumference of the insulating skeleton, one side of the second plate has a concave portion, and the other side has a convex portion that matches the concave portion, and the inner circumference is formed by staggered overlap of the concave portion and the convex portion; the second plate includes a second surface that is staggered and arranged parallel to the first surface and the first surface, the first surface is connected to the support plate, and a first side plate and a second side plate are provided between the first surface and the second surface, one end of the first side plate is connected to the first surface, and the other end is bent toward the direction of the second surface and connected to the second surface, and a concave portion is formed at the bending point with the first surface; one end of the second side plate is connected to the second surface, and the other end is bent toward the direction of the first surface and connected to the first surface, and a convex portion is formed at the bending point with the second surface; An oil outlet is provided at the bottom of the shell body, and the oil outlet is used to connect to a cooling box.

2. The motor winding cooling structure according to claim 1, characterized in that: It also includes a winding, wherein a support plate is provided between the first plate and the second plate, and the winding is formed by winding an enameled wire on the support plate.

3. The motor winding cooling structure according to claim 1, characterized in that: It also includes an iron core, and the insulating frame is arranged between the iron core and the winding.

4. The motor winding cooling structure according to claim 1, characterized in that: The two axial ends of the linear stator are both provided with limit blocks, the first baffle plate and the second baffle plate are provided with limit holes matched with the limit blocks, and the third baffle plate and the fourth baffle plate are provided with limit holes matched with the limit blocks.

5. The motor winding cooling structure according to claim 1, characterized in that: A first end cover is disposed on the outer side of the first sealing cover, and a second end cover is disposed on the outer side of the second sealing cover. The first end cover and the second end cover are respectively connected to two ends of the shell.

6. A motor, characterized in that: It comprises a rotating shaft, a rotor sleeved on the rotating shaft and a motor winding cooling structure as claimed in any one of claims 1 to 5, wherein the rotating shaft passes through the center of the shell.

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