Motor integrated with stator oil cooling sealing structure

Abstract

The application discloses a motor integrated with a stator oil cooling sealing structure, belongs to the technical field of motor stator cooling, discloses a sealing structure of a stator oil cooling configuration motor realized based on sealing in a stator slot and sealing of a stator end cavity, has the technical feature that the sealing structure does not occupy an equivalent electromagnetic air gap of the motor, has the power density advantage compared with a traditional motor configuration integrated with an air gap oil separation sleeve, discloses an oil separation sleeve adopting a multistage composite material multilayer structure, the proposed oil separation sleeve has the technical feature of partial magnetic conduction, reduces the sacrifice of the equivalent electromagnetic air gap of the motor caused by the introduction of the air gap oil separation sleeve, and has the performance advantage compared with a traditional oil separation sleeve configuration without magnetic conduction. The application reduces or avoids the sacrifice of the equivalent electromagnetic air gap of the motor caused by the sealing structure while ensuring the effective sealing of the stator and the rotor.

Description

Technical Field

[0001] This invention belongs to the field of motor stator cooling technology, and more specifically, relates to a motor with an integrated stator oil-cooling sealing structure. Background Technology

[0002] In recent years, applications in electric vehicles, electric aviation, and military equipment have placed higher power density requirements on motors, with increasing electromagnetic load being the primary method for achieving this. However, due to limitations in the magnetic properties of electrical materials, the magnetic load of motors has reached its limit, making increasing electrical load an effective means of achieving high power density. High electrical load, however, leads to high stator losses, causing stator overheating and affecting motor stability and safety. In engineering, stator immersion / spraying configurations are often used to achieve efficient cooling. Simultaneously, to prevent cooling oil from entering the rotor cavity and causing high rotor churning losses, effective oil sealing between the stator and rotor has become a key technology in the design of high power density motors.

[0003] The current main solution for this key technology is to arrange an oil separator sleeve in the air gap of the motor. For example, the motor structure disclosed in patent applications CN113300538A (A High Power Density Permanent Magnet Synchronous Motor), CN117674461A (A Direct Drive Motor Circulating Oil Cooling Structure), and CN118300314A (A High-Speed ​​Permanent Magnet Motor and Its Heat Dissipation System) all employ an oil separator ring structure. The oil separator ring is fixed to the front and rear end covers, achieving effective oil sealing between the stator and rotor. To avoid significant magnetic leakage, the material of the aforementioned oil separator ring is currently mainly non-magnetic. For example, patent application CN215071902U (A Glass Fiber Motor Oil Separator Sleeve) discloses a motor oil separator sleeve made of glass fiber reinforced resin material.

[0004] In summary, non-magnetic air gap oil separators are currently mainly used to achieve stator sealing. However, the introduction of non-magnetic materials will directly lead to an increase in the effective electromagnetic air gap of the motor, reducing the magnetic load of the motor and restricting the improvement of motor power density to a certain extent.

[0005] To address the aforementioned issues, patent application CN110350679A provides a stator sealing structure and a motor with this sealing structure. This structure achieves complete sealing of the motor stator by setting end sealing plates and end sealing plate pressure rings on the motor end faces and by potting adhesive into the cavity at the stator slots, effectively isolating the motor stator and rotor. Since the end sealing plates and end sealing plate pressure rings do not occupy the air gap space between the motor stator and rotor, it is not necessary to reduce the rotor radius or increase the stator inner diameter to add the sealing structure. Therefore, the motor air gap size can be smaller, further improving the motor's torque density and power density. However, in this motor, to achieve the seal, both the end sealing plates and end sealing plate pressure rings need to be fixed to the stator core using end fixing bolts. Correspondingly, threaded holes need to be provided on the stator core. However, since the stator core is made of stacked silicon steel sheets, drilling threaded holes is very difficult in engineering, resulting in unstable fixing and potentially affecting the actual sealing effect, thus impacting the cooling effect of the motor stator. Meanwhile, the space reserved for sealing the stator slots with glue will inevitably result in a certain sacrifice in the motor slot fill factor, weakening the power density gain of the design. Furthermore, the slot flow channels in this design may be blocked by wires in motor configurations using loose-wire windings. Summary of the Invention

[0006] In view of the shortcomings of the existing technology and the need for improvement, the present invention provides a motor with an integrated stator oil-cooled sealing structure. Its purpose is to ensure effective sealing of the stator and rotor while avoiding the sealing structure occupying the electromagnetic air gap.

[0007] To achieve the above objectives, according to one aspect of the present invention, an electric motor with an integrated stator oil-cooled sealing structure is provided, comprising: a housing, a stator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0008] An end sealing ring is provided between each end cover and the stator; an annular sealing ring stop is provided on the inner end face of the end cover; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove.

[0009] The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip that fits the gap between the tooth shoes of adjacent stator teeth is disposed between the tooth shoes, and a slot wedge is disposed in the stator slot between adjacent stator teeth, the length of the stator slot sealing strip and the slot wedge being the same as the axial length of the stator core; there is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth, forming an in-slot flow channel;

[0010] The outer diameter of the end sealing ring is the same as the outer diameter of the stator groove sealing strip;

[0011] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0012] The motor with integrated stator oil-cooling sealing structure provided by the present invention, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the groove channel along the outer surface of the end sealing ring, flows along the groove channel to the other end stator cavity, and then flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0013] According to another aspect of the present invention, another type of motor with an integrated stator oil-cooled sealing structure is provided, comprising: a housing, a stator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0014] An end sealing ring is provided between each end cover and the stator; an annular sealing ring stop is provided on the inner end face of the end cover; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove.

[0015] The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip that fits the gap between the tooth shoes of adjacent stator teeth is disposed between the tooth shoes, and a slot wedge is disposed in the stator slot between adjacent stator teeth, the length of the stator slot sealing strip and the slot wedge being the same as the axial length of the stator core; there is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth, forming an in-slot flow channel;

[0016] The outer diameter of the end sealing ring is the same as the outer diameter of the groove wedge; the middle of the end sealing ring is also provided with an annular sealing ring flow channel, and its outer surface is also provided with a guide hole that communicates with the sealing ring flow channel; the end of the end sealing ring near the stator is also provided with multiple countersunk holes that communicate with the sealing ring flow channel. The number and position of the countersunk holes correspond one-to-one with the flow channel in the groove, and the corresponding countersunk holes are connected to the flow channel in the groove through a flow pipe.

[0017] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0018] The motor with integrated stator oil-cooling sealing structure provided by the present invention, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the sealing ring flow channel inside the end sealing ring along the guide hole on the outer surface of the end sealing ring, then flows into the groove flow channel through the flow pipe and flows to the other end along the groove flow channel, and flows out into the stator cavity through the sealing ring flow channel and guide hole in the end sealing ring at the other end in sequence, and finally flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0019] According to another aspect of the present invention, another type of motor with an integrated stator oil-cooled sealing structure is provided, comprising: a housing, a stator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0020] The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, stator slot sealing strips that fit the gap between adjacent stator teeth are disposed between the tooth shoes, and slot wedges are disposed in the stator slots between adjacent stator teeth, with a certain gap between the slot wedges and the stator slot sealing strips of the same pair of adjacent stator teeth, forming a flow channel in the slot; the stator pressure plates extend outward from the corresponding positions of the tooth shoes to form bosses, and positioning blocks are disposed on the inner surface of the bosses; the length of the stator slot sealing strips is the same as the axial distance between the outer end faces of the bosses of the two stator pressure plates; the length of the slot wedges is the same as the axial length of the stator core;

[0021] An annular sealing ring stop is provided on the inner end face of the end cap;

[0022] An end sealing ring is provided between each end cover and the stator; the end sealing ring is cylindrical, and its outer diameter is the same as the inner diameter of the stator pressure plate boss. One end of the end sealing ring is installed in the sealing ring stop, and the other end extends from the outer end face of the stator pressure plate boss into the stator to the positioning block; a second annular groove is provided on the outer surface of the part of the end sealing ring that extends into the stator; a sealing ring is installed in the second annular groove.

[0023] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0024] The motor with integrated stator oil-cooling sealing structure provided by the present invention, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the groove channel through the outer surface of the end sealing ring and the outer surface of the stator pressure plate boss in sequence, and flows along the groove channel to the other end stator cavity, and then flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0025] According to another aspect of the present invention, another type of motor with an integrated stator oil-cooled sealing structure is provided, comprising: a housing, a stator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0026] An end sealing ring is provided between each end cover and the stator; an annular sealing ring stop is provided on the inner end face of the end cover; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove.

[0027] The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the length of the stator slot sealing strip is the same as the axial length of the stator core and is in the shape of a "T", its vertical part fits with the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoes, and an axially through sealing strip flow channel is disposed therebetween;

[0028] The outer diameter of the end sealing ring is the same as the outer diameter of the stator core gear shoe;

[0029] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0030] The motor with integrated stator oil-cooling sealing structure provided by the present invention, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the sealing strip channel along the outer surface of the end sealing ring, and flows along the sealing strip channel to the other end stator cavity, and then flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0031] According to another aspect of the present invention, another type of motor with an integrated stator oil-cooled sealing structure is provided, comprising: a housing, a stator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0032] An end sealing ring is provided between each end cover and the stator; an annular sealing ring stop is provided on the inner end face of the end cover; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove.

[0033] The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the length of the stator slot sealing strip is the same as the axial length of the stator core and is in the shape of a "T", its vertical part fits with the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoes, and an axially through sealing strip flow channel is disposed therebetween;

[0034] The outer diameter of the end sealing ring is the same as the outer diameter of the stator groove sealing strip; the middle of the end sealing ring is also provided with an annular sealing ring flow channel, and its outer surface is also provided with a guide hole that communicates with the sealing ring flow channel; the end of the end sealing ring near the stator is also provided with multiple countersunk holes that communicate with the sealing ring flow channel, the number and position of the countersunk holes correspond one-to-one with the sealing strip flow channel, and the corresponding countersunk holes and the sealing strip flow channel are connected by a flow pipe.

[0035] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0036] The motor with integrated stator oil-cooling sealing structure provided by the present invention, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the sealing ring flow channel inside the end sealing ring along the guide hole on the outer surface of the end sealing ring, then flows into the sealing strip flow channel through the flow pipe and flows along the sealing strip flow channel to the other end, and then flows out into the stator cavity through the sealing ring flow channel and guide hole in the end sealing ring at the other end in sequence, and finally flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0037] According to another aspect of the present invention, another type of motor with an integrated stator oil-cooled sealing structure is provided, comprising: a housing, a stator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0038] The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the stator slot sealing strip is "T" shaped, its vertical part fits with the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoes, and an axially through sealing strip flow channel is disposed therebetween; the stator pressure plate extends outward from the corresponding position of the tooth shoes to form a boss, and a positioning block is disposed on the inner surface of the boss, the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the bosses of the two stator pressure plates;

[0039] An annular sealing ring stop is provided on the inner end face of the end cap;

[0040] An end sealing ring is provided between each end cover and the stator; the end sealing ring is cylindrical, and its outer diameter is the same as the inner diameter of the stator pressure plate boss. One end of the end sealing ring is installed in the sealing ring stop, and the other end extends from the outer end face of the stator pressure plate boss into the stator to the positioning block; a second annular groove is provided on the outer surface of the part of the end sealing ring that extends into the stator; a sealing ring is installed in the second annular groove.

[0041] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0042] The motor with integrated stator oil-cooling sealing structure provided by the present invention allows the cooling medium to be injected into the stator cavity through one terminal hole. The cooling medium will flow into the sealing strip channel through the outer surface of the end sealing ring and the outer surface of the stator pressure plate boss in sequence, and then flow along the sealing strip channel to the other end stator cavity, and then flow out through another terminal hole, thereby achieving cooling of the motor stator.

[0043] According to another aspect of the present invention, another type of motor with an integrated stator oil-cooled sealing structure is provided, comprising: a housing, a stator, an oil separator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0044] The oil separator includes N+1 layers of reinforcing fiber-resin and N layers of powder-resin, arranged alternately. The reinforcing fiber-resin layer is composed of a mixture of reinforcing fiber and resin. The powder-resin layer is divided into alternating magnetic and non-magnetic sections along the circumferential direction. The magnetic sections are located corresponding to the stator tooth surfaces and are composed of a mixture of magnetic powder and resin. The non-magnetic sections are located corresponding to the stator tooth gaps and are composed of a mixture of non-magnetic powder and resin.

[0045] Each end cap or housing of the motor is provided with a terminal hole that connects to the stator cavity on the same side;

[0046] Where N is a positive integer.

[0047] The motor with integrated stator oil-cooling sealing structure provided by the present invention, when cooled, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the stator slot along the outer surface of the oil separator sleeve, and flows along the gap of the stator slot to the other end of the stator cavity, and then flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0048] Furthermore, the outer and inner surfaces of the oil separator sleeve are each provided with a functional layer; the functional layer is used to perform at least one of the following functions:

[0049] Surface reinforced for corrosion resistance.

[0050] In summary, the above-described technical solutions conceived in this invention can achieve the following beneficial effects:

[0051] (1) In some optional embodiments of the present invention, the seal between the stator and rotor is achieved by using a slot wedge and an end sealing ring. Since the sealing structure does not occupy the electromagnetic air gap, the influence on the magnetic load of the motor is avoided. At the same time, one end of the sealing ring end cover is installed on the sealing ring stop provided on the end cover, and the other end is in direct contact with the stator end through the sealing ring. It does not rely on fixing bolts and does not require threaded holes to be provided on the stator core, thus achieving effective sealing.

[0052] (2) In some optional embodiments of the present invention, the seal between the stator and rotor is achieved using a slot wedge and an end sealing ring. Since the sealing structure does not occupy the electromagnetic air gap, it avoids the influence on the magnetic load of the motor. At the same time, one end of the sealing ring end cover is installed on the sealing ring stop provided on the end cover, and the other end directly contacts the stator end through the sealing ring. It does not rely on fixing bolts, nor does it require threaded holes on the stator core, thus achieving effective sealing. On this basis, by setting structures such as guide holes and flow pipes, the outer diameter of the end sealing ring is expanded to be the same as the outer diameter of the slot wedge, increasing the thickness of the end sealing ring, thereby further improving the overall mechanical strength.

[0053] (3) In some optional embodiments of the present invention, a groove wedge and an end sealing ring are used to achieve a seal between the stator and rotor. Since the sealing structure does not occupy the electromagnetic air gap, it avoids the influence on the magnetic load of the motor. At the same time, one end of the sealing ring end cover is installed on the sealing ring stop provided on the end cover, and the other end directly contacts the stator end through the sealing ring. It does not rely on fixing bolts, nor does it require threaded holes on the stator core, thus achieving effective sealing. On this basis, a boss is formed by extending outward from the stator pressure plate corresponding to the tooth shoe, and a positioning block is provided so that the end sealing ring penetrates into the stator, and the sealing ring is installed on the circumferential outer surface. This can avoid sealing failure due to installation defects, motor vibration, and other factors, further increasing the reliability of the seal.

[0054] (4) In some optional embodiments of the present invention, the structure of the stator slot sealing strip provided between the tooth shoes of adjacent stator teeth is improved so that it provides a cooling medium flow channel and realizes the function of slot wedge, which can reduce the space occupied in the stator slot and ensure a high slot fill factor; the sealing between the stator and rotor is realized by using the sealing ring at the end of the stator slot sealing strip. Since the sealing structure does not occupy the electromagnetic air gap, the influence on the magnetic load of the motor is avoided. At the same time, one end of the sealing ring end cover is installed on the sealing ring stop provided on the end cover, and the other end is in direct contact with the stator end through the sealing ring. It does not rely on fixing bolts and does not require threaded holes to be provided on the stator core, thus achieving effective sealing.

[0055] (5) In some optional embodiments of the present invention, the structure of the stator slot sealing strip provided between the tooth shoes of adjacent stator teeth is improved so that it provides a cooling medium flow channel and realizes the function of a slot wedge, which can reduce the space occupied in the stator slot and ensure a high slot fill factor; the sealing between the stator and rotor is achieved by using the end sealing ring of the stator slot sealing strip. Since the sealing structure does not occupy the electromagnetic air gap, it avoids the influence on the magnetic load of the motor. At the same time, one end of the sealing ring end cover is installed on the sealing ring stop provided on the end cover, and the other end directly contacts the stator end through the sealing ring, which does not rely on fixing bolts and does not require threaded holes on the stator core, thus achieving effective sealing. On this basis, by setting the flow guide hole, flow pipe and other structures, the outer diameter of the end sealing ring is expanded to be the same as the outer diameter of the slot wedge, increasing the thickness of the end sealing ring, thereby further improving the overall mechanical strength.

[0056] (6) In some optional embodiments of the present invention, the structure of the stator slot sealing strip provided between the tooth shoes of adjacent stator teeth is improved so that it provides a cooling medium flow channel and realizes the function of a slot wedge, which can reduce the space occupied in the stator slot and ensure a high slot fill factor; the sealing between the stator and rotor is achieved by using the end sealing ring of the stator slot sealing strip. Since the sealing structure does not occupy the electromagnetic air gap, it avoids the influence on the magnetic load of the motor. At the same time, one end of the sealing ring end cover is installed on the sealing ring stop provided on the end cover, and the other end directly contacts the stator end through the sealing ring, which does not rely on fixing bolts and does not require threaded holes on the stator core, thus achieving effective sealing. On this basis, a boss is formed by extending outward from the stator pressure plate corresponding to the tooth shoe and a positioning block is provided so that the end sealing ring penetrates into the stator and the sealing ring is installed on the circumferential outer surface, which can avoid sealing failure due to installation defects, motor vibration and other factors, and further increase the sealing reliability.

[0057] (7) In some optional embodiments of the present invention, the structure of the oil separator sleeve is partially improved by making it magnetically conductive. The position corresponding to the gap between the oil separator sleeve and the stator teeth is non-magnetic, thereby avoiding large magnetic leakage. The position corresponding to the oil separator sleeve and the stator tooth surface is magnetically conductive, reducing the sacrifice of the equivalent electromagnetic air gap of the motor by the traditional oil separator sleeve and mitigating the impact of the traditional non-magnetic oil separator sleeve on the magnetic load of the motor. At the same time, the present invention directly utilizes the oil separator sleeve to achieve effective sealing between the stator and rotor. Attached Figure Description

[0058] Figure 1 This is a three-dimensional exploded view of the motor structure with integrated stator oil-cooling sealing structure provided in Embodiment 1 of the present invention;

[0059] Figure 2 This is a three-dimensional exploded view of the stator structure in the motor with integrated stator oil-cooling sealing structure provided in Embodiment 1 of the present invention.

[0060] Figure 3 This is a schematic diagram of the housing structure of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 1 of the present invention;

[0061] Figure 4 This is a schematic diagram of the drive end cover of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 1 of the present invention;

[0062] Figure 5 This is a schematic diagram of the non-drive end cover of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 1 of the present invention;

[0063] Figure 6 This is a schematic diagram of the stator slot sealing strip and its installation position in a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 1 of the present invention.

[0064] Figure 7 This is a schematic diagram of the end sealing ring of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 1 of the present invention;

[0065] Figure 8 This is a schematic diagram of the cooling medium flow in a motor with an integrated stator oil-cooled sealing structure provided in Embodiment 1 of the present invention;

[0066] Figure 9 This is a three-dimensional exploded view of the motor structure with integrated stator oil-cooling sealing structure provided in Embodiment 2 of the present invention;

[0067] Figure 10 This is a three-dimensional exploded view of the stator structure in the motor with integrated stator oil-cooling sealing structure provided in Embodiment 2 of the present invention;

[0068] Figure 11 This is a schematic diagram of the motor housing with an integrated stator oil-cooling sealing structure provided in Embodiment 2 of the present invention;

[0069] Figure 12 This is a schematic diagram of the drive end cover of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 2 of the present invention;

[0070] Figure 13 This is a schematic diagram of the non-drive end cover of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 2 of the present invention;

[0071] Figure 14 This is a schematic diagram of the stator slot sealing strip, slot wedge, and their installation positions in a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 2 of the present invention.

[0072] Figure 15 This is a schematic diagram of the end sealing ring of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 2 of the present invention;

[0073] Figure 16This is a schematic diagram of the flow of cooling medium in a motor with an integrated stator oil-cooled sealing structure provided in Embodiment 2 of the present invention;

[0074] Figure 17 This is a three-dimensional exploded view of the stator structure in the motor with integrated stator oil-cooling sealing structure provided in Embodiment 6 of the present invention;

[0075] Figure 18 This is a schematic diagram of the stator pressure plate in the motor with an integrated stator oil-cooling sealing structure provided in Embodiment 6 of the present invention;

[0076] Figure 19 This is a cross-sectional view of a motor with an integrated stator oil-cooling sealing structure provided in Embodiment 6 of the present invention;

[0077] Figure 20 This is a schematic diagram of the structure of the oil separator sleeve in the motor with an integrated stator oil cooling sealing structure provided in Embodiment 7 of the present invention;

[0078] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0079] 1-Stator, 11-Stator core, 12-Winding, 13-Stator pressure plate, 14-Stator slot sealing strip, 141-Seal strip end countersunk hole, 142-Seal strip flow channel, 15-Flow pipe, 16-End sealing ring, 161-Sealing ring flow channel, 162-Sealing ring end face countersunk hole, 163-First annular groove, 17-Slot wedge;

[0080] 2-Housing, 21-Drive end cover connection hole, 22-Non-drive end cover connection hole, 23-Stator retaining ring, 24-Tooling hole;

[0081] 3-Drive end cap, 31-Power line terminal hole, 32-Signal line terminal hole, 33-Drive end stop, 34-Drive end sealing groove, 35-Oil inlet terminal hole, 36-Drive end cap mounting hole;

[0082] 4-Non-drive end cap, 41-Non-drive end stop, 42-Non-drive end sealing groove, 43-Oil outlet terminal hole, 44-Non-drive end cap mounting hole;

[0083] 5-Rotor. Detailed Implementation

[0084] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0085] In this invention, the terms "first," "second," etc. (if present) in the invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0086] Example 1:

[0087] A motor with an integrated stator oil-cooled sealing structure, such as Figure 1 The aforementioned includes: a housing, a stator, and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0088] An end sealing ring is provided between each end cover and the stator; an annular sealing ring stop is provided on the inner end face of the end cover; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove.

[0089] The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the length of the stator slot sealing strip is the same as the axial length of the stator core and is in the shape of a "T", its vertical part fits with the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoes, and an axially through sealing strip flow channel is disposed therebetween;

[0090] The outer diameter of the end sealing ring is the same as the outer diameter of the stator groove sealing strip; the middle of the end sealing ring is also provided with an annular sealing ring flow channel, and its outer surface is also provided with a guide hole that communicates with the sealing ring flow channel; the end of the end sealing ring near the stator is also provided with multiple countersunk holes that communicate with the sealing ring flow channel, the number and position of the countersunk holes correspond one-to-one with the sealing strip flow channel, and the corresponding countersunk holes and the sealing strip flow channel are connected by a flow pipe.

[0091] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0092] The following section provides a detailed description of each structure in the motor, with reference to the accompanying drawings.

[0093] In this embodiment, the stator 1 and the housing 2 are installed with an interference fit. In this embodiment, the two end covers serve as the drive end cover 3 and the non-drive end cover 4, respectively. Two terminal holes are respectively located on the drive end cover 3 and the non-drive end cover 4, serving as the oil inlet and oil outlet, respectively. The rotor 5 is connected to the drive end cover 3 and the non-drive end cover 4 via front and rear bearings, respectively. The entire motor is cantilevered via several mounting holes on the flange of the housing 2.

[0094] like Figure 2As shown, the stator 1 includes a stator core 11, stator windings 12, a stator pressure plate 13, a stator slot sealing strip 14, a flow pipe 15, and an end sealing ring 16. The stator pressure plate 13 is installed on both end faces of the stator and has several circumferentially positioned slots. These slots can be connected to corresponding positioning holes in the stator core using positioning pins to constrain its circumferential position. Its shape can perfectly fit a portion of the core, and its inner radius is the same as the outer radius of the end sealing ring, allowing for radial positioning of the end sealing ring. The stator windings 12 are embedded in the slots of the stator core 11. The windings are not limited to loose or flat wires. The stator slot sealing strip 14 acts as a slot wedge, pressing the windings to prevent loosening. Additionally, adhesive bonding can be used to fix the contact surface between the stator slot sealing strip 14 and the stator core 11 to achieve sealing of the cooling oil within the stator slots. The stator slot sealing strip is designed in a "T" shape to ensure sufficient mechanical strength without significantly affecting the slot fill factor. Two end sealing rings 16 are provided at both ends of the stator 1. One side of each end sealing ring 16 has an annular groove for mounting a sealing ring. The end faces of the two end sealing rings 16 with the annular grooves face each other and contact the stator end face. Both the end sealing rings 16 and the stator groove sealing strip 14 have axial flow channels, and both flow channels have countersunk holes near the end face of the stator core 11. The total length of the countersunk holes is the axial length of the flow passage 15, providing space for the flow passage 15 to be installed. The flow passage 15 also serves to constrain the tangential position of the end sealing rings 16. It is worth noting that the shape of the mentioned flow passage holes is not limited to circular.

[0095] like Figure 3 As shown, the housing 2 is a cylindrical shape with a flange, and has several drive end cover connection holes 21 and non-drive end cover connection holes 22, which are used for positioning and installation of drive end cover 3 and non-drive end cover 4 respectively; at the same time, a stator retaining ring 23 is provided, and several positioning holes are distributed on it, which share the positioning pins of stator core 11 and non-drive end stator pressure plate 13, providing axial and circumferential positioning for stator 1; several tooling holes 24 are provided on the flange for cantilever installation of the motor.

[0096] like Figure 4 As shown, the drive end cap 3 is cylindrical with a central opening, and has several power line terminal holes 31 and signal line terminal holes 32; it is provided with a drive end stop 33 for the installation of the drive end side sealing ring 16; it is provided with an oil inlet terminal hole 35 for the installation of the oil inlet terminal; it is provided with a drive end sealing groove 34 for the installation of the sealing ring; and it is provided with a drive end cap mounting hole 36.

[0097] like Figure 5 As shown, the non-drive end cap 4 is cylindrical with a central opening, and is provided with a non-drive end stop 41 for the installation of the non-drive end side sealing ring stop; it is provided with an oil outlet terminal hole 43 for the installation of an oil inlet terminal; it is provided with a non-drive end sealing groove 42 for the installation of a sealing ring; and it is provided with a non-drive end cap mounting hole 44.

[0098] like Figure 6 As shown, the shape of the stator slot sealing strip 14 can completely fit the gap between part of the stator gear shoes, and provides a sealing effect with adhesive connection; an axially through sealing strip flow channel 142 is provided as a slot cooling flow channel; a countersunk hole 141 is provided near the end face of the stator 11 for the installation of the flow pipe 15.

[0099] like Figure 7 As shown, the end sealing ring 16 is cylindrical; a circumferential sealing ring flow channel 161 is provided in its middle, and a guide hole communicating with the sealing ring flow channel 161 is provided on its outer surface; a first annular groove 163 is provided on the end face for the installation of the sealing ring; a countersunk hole 162 on the end face of the flow channel is provided near the end face for the installation of the flow pipe 15. The outer diameter of the end sealing ring 16 is the same as the outer diameter of the stator groove sealing strip 14.

[0100] like Figure 8 As shown, in this embodiment, the cooling medium enters through the oil inlet on the drive end cover, enters the stator cavity of the motor drive end, and then flows sequentially through the flow paths provided in the drive end end sealing ring 16, drive end flow pipe 15, stator slot sealing strip 14, non-drive end flow pipe 15, and non-drive end end sealing ring 16 into the non-drive end stator cavity. Finally, it is discharged through the stator oil outlet on the non-drive end cover 4. In practical applications, the cooling medium can be cooling oil or other liquid or gaseous cooling media.

[0101] In this embodiment, the structure of the stator slot sealing strip between adjacent stator teeth is improved to provide a cooling medium flow channel and function as a slot wedge, reducing the space occupied in the stator slots and ensuring a high slot fill factor. The sealing ring at the end of the stator slot sealing strip achieves a seal between the stator and rotor. Since the sealing structure does not occupy the electromagnetic air gap, it avoids affecting the motor's magnetic load. Simultaneously, one end of the sealing ring end cap is installed on a sealing ring stop on the end cap, and the other end directly contacts the stator end via a sealing ring, eliminating the need for fixing bolts and threaded holes in the stator core, thus achieving effective sealing. Furthermore, by incorporating flow guide holes and flow pipes, the outer diameter of the end sealing ring is enlarged to match the outer diameter of the stator slot sealing strip, increasing the thickness of the end sealing ring and further improving the overall mechanical strength.

[0102] Example 2:

[0103] A motor with an integrated stator oil-cooled sealing structure, such as Figure 9 As shown, it includes: a housing, a stator, and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0104] An end sealing ring is provided between each end cover and the stator; an annular sealing ring stop is provided on the inner end face of the end cover; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove.

[0105] like Figure 10 As shown, the stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip that fits the gap between the tooth shoes of adjacent stator teeth is disposed between the tooth shoes, and a slot wedge is disposed in the stator slot between adjacent stator teeth, the length of the stator slot sealing strip and the slot wedge being the same as the axial length of the stator core; there is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth, forming an in-slot flow channel;

[0106] The outer diameter of the end sealing ring is the same as the outer diameter of the stator groove sealing strip;

[0107] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0108] The following section provides a detailed description of each structure in the motor, with reference to the accompanying drawings.

[0109] In this embodiment, the stator 1 and the housing 2 are installed with an interference fit. In this embodiment, the two end covers serve as the drive end cover 3 and the non-drive end cover 4, respectively. Two terminal holes are respectively located on the drive end cover 3 and the non-drive end cover 4, serving as the oil inlet and oil outlet, respectively. The rotor 5 is connected to the drive end cover 3 and the non-drive end cover 4 via front and rear bearings, respectively. The entire motor is cantilevered via several mounting holes on the flange of the housing 2.

[0110] like Figure 10As shown, the stator 1 includes a stator core 11, a stator winding 12, a stator pressure plate 13, a stator slot wedge 17, a stator slot sealing strip 14, and an end sealing ring 16. The stator pressure plate 13 is installed on both end faces of the stator and has several positioning slots circumferentially arranged therein. These slots can be connected to the corresponding positioning holes in the stator core using positioning pins to constrain its circumferential position. Its shape can perfectly fit part of the core, and its inner radius is the same as the outer radius of the end sealing ring, allowing for radial positioning of the end sealing ring. The stator winding 12 is embedded in the slots of the stator core 11. It is worth noting that the winding here is not limited to loose wire or flat wire. The stator slot wedge 17 can clamp the winding to prevent it from loosening. The stator slot sealing strip 14 fits the shape of the stator slot opening. The contact surface between the stator slot sealing strip 14 and the stator core 11 can be fixed by adhesive bonding to achieve sealing of the cooling oil in the stator slot. A certain gap is provided between the stator slot wedge 17 and the stator slot sealing strip 14 as a flow channel for the cooling medium. Two end sealing rings 16 are provided at both ends of the stator 1. One side of the end sealing ring 16 has an annular groove for installing a sealing ring. The end faces of the two end sealing rings 16 with the annular groove face each other and contact the stator end face.

[0111] like Figure 11 As shown, the housing 2 is a cylindrical shape with a flange, and its structure is the same as that of the housing in Embodiment 1 above. It has several drive end cover connection holes 21 and non-drive end cover connection holes 22, which are used for positioning and installation of drive end cover 3 and non-drive end cover 4, respectively. At the same time, a stator retaining ring 23 is provided, and several positioning holes are distributed on it to connect the positioning pins of the shared stator core 11 and non-drive end stator pressure plate 13, providing axial and circumferential positioning for the stator 1. Several tooling holes 24 are provided on the flange for cantilever installation of the motor.

[0112] like Figure 12 As shown, the drive end cap 3 is a cylindrical shape with a central opening, and its structure is the same as that of the drive end cap in Embodiment 1 above. It has several power line terminal holes 31 and signal line terminal holes 32; a drive end stop 33 is provided for the installation of the drive end side sealing ring 16; an oil inlet terminal hole 35 is provided for the installation of the oil inlet terminal; a drive end sealing groove 34 is provided for the installation of the sealing ring; and a drive end cap mounting hole 36 is provided.

[0113] like Figure 13 As shown, the non-drive end cap 4 is a cylindrical shape with a central opening. Its structure is the same as that of the non-drive end cap in Embodiment 1 above. It is provided with a non-drive end stop 41 for the installation of the non-drive end sealing ring 16; an oil outlet terminal hole 43 for the installation of the oil inlet terminal; a non-drive end sealing groove 42 for the installation of the sealing ring; and a non-drive end cap mounting hole 44.

[0114] like Figure 14As shown, the shape of the stator slot sealing strip 14 can completely fit the gap between part of the stator tooth shoe, and provides a sealing effect with adhesive connection; a certain gap is left between the stator slot wedge 17 and the stator slot sealing strip 14 to provide a channel for the cooling medium.

[0115] like Figure 15 As shown, the end sealing ring 16 is cylindrical and has an annular groove 161 on its end face for mounting the sealing ring. The outer diameter of the end sealing ring 16 is the same as the outer diameter of the stator groove sealing strip.

[0116] like Figure 16 As shown, in this embodiment, the cooling oil enters from the oil inlet on the drive end cover, enters the stator cavity of the motor drive end, then enters the stator cavity of the motor non-drive end through the gap between the stator slot wedge 17 and the stator slot sealing strip 14, and finally exits from the stator oil outlet on the non-drive end cover. In practical applications, the cooling medium can be cooling oil or other liquid or gaseous cooling media.

[0117] This embodiment utilizes stator slot sealing strips and end sealing rings to achieve sealing between the stator and rotor. Since the sealing structure does not occupy the electromagnetic air gap, it avoids the influence on the magnetic load of the motor. At the same time, one end of the end sealing ring is installed on the sealing ring stop provided on the end cover, and the other end directly contacts the stator end through the sealing ring. It does not rely on fixing bolts, nor does it require threaded holes on the stator core, thus achieving effective sealing.

[0118] Example 3:

[0119] An electric motor with an integrated stator oil-cooled sealing structure includes: a housing, a stator, and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing.

[0120] This embodiment is similar to Embodiment 2 above, except that, in this embodiment, as in Embodiment 1, the "T"-shaped stator slot sealing strip with a sealing strip flow channel is used to simultaneously achieve the function of a slot wedge. Accordingly, the stator includes: a stator core and a stator winding embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the length of the stator slot sealing strip is the same as the axial length of the stator core and is "T"-shaped, its vertical part fits the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoe, with an axially penetrating sealing strip flow channel disposed therebetween; and the outer diameter of the end sealing ring is the same as the outer diameter of the stator core tooth shoe.

[0121] The motor with integrated stator oil-cooling sealing structure provided by the present invention, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the sealing strip channel along the outer surface of the end sealing ring, and flows along the sealing strip channel to the other end stator cavity, and then flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0122] This embodiment improves the structure of the stator slot sealing strip between adjacent stator teeth, enabling it to provide a cooling medium flow channel and function as a slot wedge. This reduces the space occupied in the stator slots and ensures a high slot fill factor. The sealing ring at the end of the stator slot sealing strip achieves a seal between the stator and rotor. Since the sealing structure does not occupy the electromagnetic air gap, it avoids the impact on the motor's magnetic load. At the same time, one end of the sealing ring end cover is installed on the sealing ring stop provided on the end cover, and the other end directly contacts the stator end through the sealing ring. This does not rely on fixing bolts and does not require threaded holes on the stator core, thus achieving an effective seal.

[0123] In this embodiment, the specific implementation of the stator groove sealing strip can be referred to the description in Embodiment 1 above, and the other structures can be referred to the description in Embodiment 2 above.

[0124] Example 4:

[0125] An electric motor with an integrated stator oil-cooled sealing structure includes: a housing, a stator, and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing.

[0126] This embodiment is similar in structure to Embodiment 3 above, except that, as Figure 17 As shown, the sealing structure between the end sealing ring and the stator differs. Considering that placing the sealing ring on the axial end face of the end sealing ring could affect the sealing effect due to installation defects, motor vibration, and other factors, this embodiment improves the sealing structure between the end sealing ring and the stator.

[0127] like Figure 17 and Figure 18 As shown, in this embodiment, the stator includes: a stator core and a stator winding embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the stator slot sealing strip is "T" shaped, its vertical part fits with the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially through sealing strip flow channel is disposed therebetween; the stator pressure plate extends outward from the corresponding position of the tooth shoe to form a boss, and a positioning block is disposed on the inner surface of the boss, the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the bosses of the two stator pressure plates, and the stator slot sealing strip and the stator pressure plate are in close contact and sealed by adhesive;

[0128] An annular sealing ring stop is provided on the inner end face of the end cap;

[0129] An end sealing ring is provided between each end cover and the stator; such as Figure 18 As shown, the end sealing ring is cylindrical, with its outer diameter being the same as the inner diameter of the stator pressure plate boss. One end of the ring is installed in the sealing ring stop, and the other end extends from the outer end face of the stator pressure plate boss into the stator to the positioning block. A second annular groove is provided on the outer surface of the portion of the end sealing ring that extends into the stator. A sealing ring is installed in the second annular groove.

[0130] Each end cap or housing of the motor has a terminal hole that connects to the stator cavity on the same side.

[0131] like Figure 19 As shown, in the motor with integrated stator oil-cooling sealing structure provided in this embodiment, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium will flow into the groove channel in sequence through the outer surface of the end sealing ring and the outer surface of the stator pressure plate boss, and flow along the groove channel to the other end stator cavity, and then flow out through another terminal hole, thereby achieving cooling of the motor stator.

[0132] This embodiment utilizes stator slot sealing strips and end sealing rings to achieve sealing between the stator and rotor. Since the sealing structure does not occupy the electromagnetic air gap, it avoids impacting the motor's magnetic load. Simultaneously, one end of the sealing ring end cover is mounted on a sealing ring stop on the end cover, while the other end directly contacts the stator end via the sealing ring. This eliminates the need for fixing bolts and threaded holes in the stator core, achieving effective sealing. Furthermore, a boss is formed by extending outwards from the stator pressure plate corresponding to the gear shoe, and a positioning block is provided to allow the end sealing ring to penetrate deep into the stator. The sealing ring is then installed on the circumferential outer surface, preventing seal failure due to installation defects, motor vibration, or other factors, further increasing sealing reliability.

[0133] Example 5:

[0134] An electric motor with an integrated stator oil-cooled sealing structure includes: a housing, a stator, and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing.

[0135] This embodiment is similar to Embodiment 1 above, except that, as in Embodiment 2 above, a stator slot sealing strip that fits the gap between adjacent stator teeth is provided between the tooth shoes. A slot wedge is provided in the stator slot between adjacent stator teeth. The length of the stator slot sealing strip and the slot wedge is the same as the axial length of the stator core. There is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth, forming a flow channel in the slot. Furthermore, the two end sealing rings are connected to the flow channel in the slot through countersunk holes and flow pipes.

[0136] The motor with integrated stator oil-cooling sealing structure provided in this embodiment, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium flows into the sealing ring flow channel inside the end sealing ring along the guide hole on the outer surface of the end sealing ring, then flows into the groove flow channel through the flow pipe and flows to the other end along the groove flow channel, and flows out into the stator cavity through the sealing ring flow channel and guide hole in the end sealing ring at the other end in sequence, and finally flows out through another terminal hole, thereby achieving cooling of the motor stator.

[0137] This embodiment utilizes a slot wedge and an end sealing ring to achieve a seal between the stator and rotor. Since the sealing structure does not occupy the electromagnetic air gap, it avoids affecting the motor's magnetic load. Simultaneously, one end of the sealing ring end cover is mounted on a sealing ring stop on the end cover, while the other end directly contacts the stator end via a sealing ring. This eliminates the need for fixing bolts and threaded holes in the stator core, achieving effective sealing. Furthermore, by incorporating flow guide holes and flow pipes, the outer diameter of the end sealing ring is enlarged to match the outer diameter of the slot wedge, increasing the thickness of the end sealing ring and further enhancing the overall mechanical strength.

[0138] Example 6:

[0139] An electric motor with an integrated stator oil-cooled sealing structure includes: a housing, a stator, and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing.

[0140] This embodiment is similar to Embodiment 4 above, except that, as in Embodiment 2 above, a stator slot sealing strip that matches the gap between adjacent stator teeth is provided between the tooth shoes. A slot wedge is provided in the stator slot between adjacent stator teeth. The length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the bosses of the two stator pressure plates, and the length of the slot wedge is the same as the axial length of the stator core. There is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth, forming a flow channel in the slot. Furthermore, the two end sealing rings are connected to the flow channel in the slot through countersunk holes and flow pipes.

[0141] In the motor with integrated stator oil-cooling sealing structure provided in this embodiment, during cooling, after the cooling medium is injected into the stator cavity through one terminal hole, the cooling medium will flow into the groove channel in sequence through the outer surface of the end sealing ring and the outer surface of the stator pressure plate boss, and flow along the groove channel to the other end stator cavity, and then flow out through another terminal hole, thereby achieving cooling of the motor stator.

[0142] This embodiment utilizes slotted wedges and end sealing rings to achieve a seal between the stator and rotor. Since the sealing structure does not occupy the electromagnetic air gap, it avoids impacting the motor's magnetic load. Simultaneously, one end of the sealing ring end cover is mounted on a sealing ring stop on the end cover, while the other end directly contacts the stator end via a sealing ring. This eliminates the need for fixing bolts and threaded holes in the stator core, achieving effective sealing. Furthermore, a boss is formed by extending outwards from the stator pressure plate corresponding to the toothed shoe, and a positioning block is installed to allow the end sealing ring to penetrate deep into the stator. The sealing ring is then mounted on the circumferential outer surface, preventing seal failure due to installation defects, motor vibration, or other factors, further increasing seal reliability.

[0143] Example 7:

[0144] An electric motor with an integrated stator oil-cooled sealing structure includes: a housing, a stator, an oil separator and a rotor arranged sequentially from the outside to the inside, and two end caps respectively disposed at both ends of the housing;

[0145] like Figure 20 As shown, the oil separator includes N+1 layers of reinforcing fiber-resin and N layers of powder-resin, arranged alternately. The reinforcing fiber-resin layer is composed of a mixture of reinforcing fiber and resin, and the reinforcing fiber can be carbon fiber, glass fiber, etc. The powder-resin layer is divided into alternating magnetic and non-magnetic sections along the circumferential direction. The magnetic section is located corresponding to the stator tooth surface and is composed of a mixture of magnetic powder and resin, and the magnetic powder can be metal magnetic powder, Fe-based amorphous alloy powder, etc. The non-magnetic section is located corresponding to the stator tooth gap and is composed of a mixture of non-magnetic powder and resin, and the non-magnetic powder can be ceramic powder, etc.

[0146] Each end cap or housing of the motor is provided with a terminal hole that connects to the stator cavity on the same side;

[0147] Where N is a positive integer; this embodiment can effectively ensure the overall mechanical strength of the oil separator sleeve by alternating the multi-layer reinforcing fiber-resin layer and the powder-resin layer.

[0148] The motor with integrated stator oil-cooling sealing structure provided in this embodiment, when cooled, injects the cooling medium into the stator cavity through one terminal hole. The cooling medium then flows along the outer surface of the oil separator into the stator slot and flows along the gap in the stator slot to the other end of the stator cavity. It then flows out through another terminal hole, thus cooling the motor stator.

[0149] In this embodiment, the position corresponding to the gap between the oil separator sleeve and the stator teeth is non-magnetic, thereby avoiding significant magnetic leakage. The position corresponding to the oil separator sleeve and the stator tooth surface is magnetic, which is equivalent to not occupying the electromagnetic air gap of the motor at the stator teeth, thus avoiding affecting the magnetic circuit of the stator teeth and consequently avoiding affecting the magnetic load of the motor. At the same time, this invention directly uses the oil separator sleeve to achieve the seal between the stator and rotor, without relying on fixing bolts or requiring threaded holes on the stator core, thus achieving effective sealing.

[0150] In a preferred embodiment, the outer and inner surfaces of the oil separator sleeve are further provided with functional layers to achieve functions such as surface reinforcement and corrosion protection.

[0151] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A motor with an integrated stator oil-cooled sealing structure, characterized in that, include: The components arranged from the outside in are a housing, a stator, and a rotor, and two end caps respectively located at both ends of the housing. An end sealing ring is provided between each end cap and the stator; an annular sealing ring stop is provided on the inner end face of the end cap; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove. The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip that fits the gap between the tooth shoes of adjacent stator teeth is disposed between the tooth shoes, and a slot wedge is disposed in the stator slot between adjacent stator teeth, the length of the stator slot sealing strip and the slot wedge being the same as the axial length of the stator core; there is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth, forming an in-slot flow channel; The outer diameter of the end sealing ring is the same as the outer diameter of the stator groove sealing strip; The motor has a terminal hole on each end cap or housing that connects to the stator cavity on the same side.

2. A motor with an integrated stator oil-cooled sealing structure, characterized in that, include: The components arranged from the outside in are a housing, a stator, and a rotor, and two end caps respectively located at both ends of the housing. An end sealing ring is provided between each end cap and the stator; an annular sealing ring stop is provided on the inner end face of the end cap; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove. The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip that fits the gap between the tooth shoes of adjacent stator teeth is disposed between the tooth shoes, and a slot wedge is disposed in the stator slot between adjacent stator teeth, the length of the stator slot sealing strip and the slot wedge being the same as the axial length of the stator core; there is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth, forming an in-slot flow channel; The outer diameter of the end sealing ring is the same as the outer diameter of the groove wedge; the middle of the end sealing ring is also provided with an annular sealing ring flow channel, and its outer surface is also provided with a guide hole communicating with the sealing ring flow channel; the end of the end sealing ring near the stator is also provided with a plurality of countersunk holes communicating with the sealing ring flow channel, the number and position of the countersunk holes correspond one-to-one with the flow channel in the groove, and the corresponding countersunk holes are connected to the flow channel in the groove through a flow pipe. The motor has a terminal hole on each end cap or housing that connects to the stator cavity on the same side.

3. A motor with an integrated stator oil-cooled sealing structure, characterized in that, include: The components arranged from the outside in are a housing, a stator, and a rotor, and two end caps respectively located at both ends of the housing. The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes of adjacent stator teeth is disposed between the tooth shoes, and a slot wedge is disposed in the stator slot between adjacent stator teeth, and there is a certain gap between the slot wedge and the stator slot sealing strip between the same pair of adjacent stator teeth to form a flow channel in the slot; the stator pressure plate extends outward from the corresponding position of the tooth shoe to form a boss, and a positioning block is disposed on the inner surface of the boss; the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the bosses of the two stator pressure plates; the length of the slot wedge is the same as the axial length of the stator core; An annular sealing ring stop is provided on the inner end face of the end cap; An end sealing ring is provided between each end cap and the stator; the end sealing ring is cylindrical, and its outer diameter is the same as the inner diameter of the stator pressure plate boss. One end of the end sealing ring is installed in the sealing ring stop, and the other end extends from the outer end face of the stator pressure plate boss into the stator to the positioning block; a second annular groove is provided on the outer surface of the portion of the end sealing ring extending into the stator; a sealing ring is installed in the second annular groove; The motor has a terminal hole on each end cap or housing that connects to the stator cavity on the same side.

4. A motor with an integrated stator oil-cooled sealing structure, characterized in that, include: The components arranged from the outside in are a housing, a stator, and a rotor, and two end caps respectively located at both ends of the housing. An end sealing ring is provided between each end cap and the stator; an annular sealing ring stop is provided on the inner end face of the end cap; the end sealing ring is cylindrical, with one end installed in the sealing ring stop and the other end in contact with the stator, and a first annular groove is provided on the end face in contact with the stator; a sealing ring is installed in the first annular groove. The stator includes: a stator core and a stator winding embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the length of the stator slot sealing strip is the same as the axial length of the stator core and is in the shape of "T", its vertical part fits with the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially through sealing strip flow channel is disposed therebetween; The outer diameter of the end sealing ring is the same as the outer diameter of the stator slot sealing strip; the middle of the end sealing ring is also provided with an annular sealing ring flow channel, and its outer surface is also provided with a guide hole communicating with the sealing ring flow channel; the end of the end sealing ring near the stator is also provided with a plurality of countersunk holes communicating with the sealing ring flow channel, the number and position of the countersunk holes correspond one-to-one with the sealing strip flow channel, and the corresponding countersunk holes and the sealing strip flow channel are connected by a flow pipe; The motor has a terminal hole on each end cap or housing that connects to the stator cavity on the same side.

5. A motor with an integrated stator oil-cooling sealing structure, characterized in that, include: The components arranged from the outside in are a housing, a stator, and a rotor, and two end caps respectively located at both ends of the housing. The stator includes: a stator core and stator windings embedded in the slots of the stator core, and stator pressure plates disposed at both ends of the stator core; in the stator core, a stator slot sealing strip is disposed between the tooth shoes of adjacent stator teeth, the stator slot sealing strip is "T" shaped, its vertical part fits with the gap between the tooth shoes, and its horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially through sealing strip flow channel is disposed therebetween; the stator pressure plate extends outward from the corresponding position of the tooth shoe to form a boss, and a positioning block is disposed on the inner surface of the boss, the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the bosses of the two stator pressure plates; An annular sealing ring stop is provided on the inner end face of the end cap; An end sealing ring is provided between each end cap and the stator; the end sealing ring is cylindrical, and its outer diameter is the same as the inner diameter of the stator pressure plate boss. One end of the end sealing ring is installed in the sealing ring stop, and the other end extends from the outer end face of the stator pressure plate boss into the stator to the positioning block; a second annular groove is provided on the outer surface of the portion of the end sealing ring extending into the stator; a sealing ring is installed in the second annular groove; The motor has a terminal hole on each end cap or housing that connects to the stator cavity on the same side.

6. A motor with an integrated stator oil-cooling sealing structure, characterized in that, include: The components arranged from the outside in are a housing, a stator, an oil separator, and a rotor, as well as two end caps respectively located at both ends of the housing; The oil separator sleeve includes alternately arranged... N +1 layer of reinforcing fiber-resin layer and N The powder-resin layer consists of a powder layer and a reinforcing fiber-resin layer. The reinforcing fiber-resin layer is composed of a mixture of reinforcing fibers and resin. The powder-resin layer is divided into alternating magnetically conductive and non-magnetically conductive sections along the circumferential direction. The magnetically conductive sections are located corresponding to the stator tooth surfaces and are composed of a mixture of magnetically conductive powder and resin. The non-magnetically conductive sections are located corresponding to the stator tooth gaps and are composed of a mixture of non-magnetically conductive powder and resin. The end cap or housing at each end of the motor is provided with a terminal hole that connects to the stator cavity on the same side. in, N It is a positive integer.

7. The motor with an integrated stator oil-cooled sealing structure as described in claim 6, characterized in that, The outer and inner surfaces of the oil separator sleeve are each provided with a functional layer; the functional layer is used to perform at least one of the following functions: Surface reinforced for corrosion resistance.

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