Motor integrated with stator oil cooling sealing structure

Abstract

The invention discloses a motor integrated with a stator oil cooling sealing structure, belongs to the technical field of motor stator cooling, and discloses a stator oil cooling type motor sealing structure realized based on stator groove inner sealing and stator end cavity sealing, which has the technical characteristic that the sealing structure does not occupy an equivalent electromagnetic air gap of the motor. Compared with a traditional motor integrated with an air gap oil separation sleeve, the motor has the advantage of power density. The invention discloses an oil separation sleeve adopting a multi-stage composite material multi-layer structure, the oil separation sleeve provided by the invention has the technical characteristic of partial magnetic conduction, reduces the sacrifice of an equivalent electromagnetic air gap of a motor caused by the introduction of an air gap oil separation sleeve, and has performance advantages compared with a non-magnetic conduction traditional oil separation sleeve configuration. Effective sealing of the stator and the rotor is ensured while motor equivalent electromagnetic air gap sacrifice caused by the sealing structure is reduced or avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor stator cooling, and more specifically, relates to a motor integrated with a stator oil cooling sealing structure. Background Art

[0002] In recent years, electric vehicles, electric aviation, military equipment and other application fields have put forward higher power density design requirements for motors, among which increasing the electromagnetic load is currently the main method to increase the power density of motors. Due to the limitations of the magnetic properties of electrical materials, the magnetic load of the motor has reached its bottleneck, and increasing the electrical load has become an effective means to achieve high power density of the motor. However, high electrical load will bring high stator losses, causing stator overheating to affect the stability and safety of motor operation. In engineering, stator oil immersion / oil injection configuration is often used to achieve efficient cooling. At the same time, in order to prevent the cooling oil from entering the rotor cavity and causing high rotor oil stirring losses, effective oil sealing between the stator and rotor has become a key technology in the design of high power density motors.

[0003] For this key technology, the main solution currently used is to arrange an oil separator barrel in the air gap of the motor. For example, in the motor configurations disclosed in the application publication numbers 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), an oil separator ring structure is adopted, in which the oil separator ring is fixed between the front and rear end covers to achieve effective oil sealing between the stator and rotor. In order to avoid large magnetic leakage, the material of the above-mentioned oil separator ring is currently mainly non-magnetic material. For example, the patent with the application publication number CN215071902U (a glass fiber motor oil separator jacket) discloses a glass fiber reinforced resin material motor oil separator jacket.

[0004] In summary, currently, non-magnetic air gap oil-isolating sleeves are 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, reduce the magnetic load of the motor, and to a certain extent restrict the improvement of the motor power density.

[0005] In view of the above problems, in the patent document with application publication number CN110350679A, a stator sealing structure and a motor having the sealing structure are provided, which realizes complete sealing of the motor stator and effectively isolates the motor stator and rotor by setting an end sealing plate and an end sealing plate pressure ring on the end face of the motor and performing a glue filling treatment on the cavity at the slot of the motor stator. Since the end sealing plate and the end sealing plate pressure ring set do not occupy the air gap space between the motor stator and rotor, that is, there is no need to reduce the rotor radius or increase the stator inner diameter for the additional sealing structure, the motor air gap size can be smaller, so the torque density and power density of the motor can be further improved. However, in this motor, in order to achieve sealing, its end sealing plate and the end sealing plate pressure ring need to be fixed to the stator core by end fixing bolts, and accordingly, a threaded hole needs to be set on the stator core, and the stator core is made of stacked silicon steel sheets. It is very difficult to drill the threaded hole in engineering, and its fixing effect is unstable, which may also affect the actual sealing effect, and then affect the cooling effect of the motor stator. At the same time, the space reserved for stator slot filling and sealing will sacrifice the motor slot fill rate to a certain extent, weakening the power density gain brought by the solution. In addition, the slot flow channel designed by it may be blocked by wires in the motor configuration with scattered wire windings. Summary of the invention

[0006] In view of the defects and improvement needs of the prior art, the present invention provides a motor integrated with a stator oil cooling sealing structure, the purpose of which 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 object, according to one aspect of the present invention, a motor with an integrated stator oil cooling sealing structure is provided, comprising: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

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

[0009] The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes is arranged between the tooth shoes of adjacent stator teeth, and a slot wedge is arranged in the stator slot between adjacent stator teeth, and 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;

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

[0011] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

[0012] The motor provided by the present invention has an integrated stator oil cooling sealing structure. When cooling, after the cooling medium is injected into the stator cavity from one terminal hole, the cooling medium will flow into the flow channel in the groove along the outer surface of the end sealing ring, and flow along the flow channel in the groove to the stator cavity at the other end, and then flow out through another terminal hole, thereby cooling the motor stator.

[0013] According to another aspect of the present invention, another motor with an integrated stator oil cooling seal structure is provided, comprising: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

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

[0015] The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes is arranged between the tooth shoes of adjacent stator teeth, and a slot wedge is arranged in the stator slot between adjacent stator teeth, and 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;

[0016] The outer diameter of the end sealing ring is the same as the outer diameter of the slot wedge; an annular sealing ring flow channel is also provided in the middle of the end sealing ring, and a guide hole connected to the sealing ring flow channel is also provided on its outer surface; a plurality of countersunk holes connected to the sealing ring flow channel are also provided at one end of the end sealing ring close to the stator, and the number and position of the countersunk holes correspond to the flow channel in the slot one by one, and the corresponding countersunk holes are connected to the flow channel in the slot through a flow pipe;

[0017] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

[0018] The motor provided by the present invention has an integrated stator oil cooling sealing structure. When cooling, after the cooling medium is injected into the stator cavity from one terminal hole, the cooling medium will flow into the sealing ring flow channel in the end sealing ring along the guide hole on the outer surface of the end sealing ring, and then flow into the flow channel in the groove through the flow pipe and flow along the flow channel in the groove to the other end, and then flow out into the stator cavity through the sealing ring flow channel and the guide hole in the end sealing ring at the other end in turn, and finally flow out through another terminal hole, thereby cooling the motor stator.

[0019] According to another aspect of the present invention, another motor with an integrated stator oil cooling seal structure is provided, comprising: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

[0020] The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and a stator pressure plate arranged at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes is arranged between the tooth shoes of adjacent stator teeth, a slot wedge is arranged 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, forming a flow channel in the slot; the stator pressure plate extends outwardly at the corresponding position of the tooth shoe to form a boss, and a positioning block is arranged on the inner surface of the boss, and the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the boss of the two stator pressure plates; the length of the slot wedge is the same as the axial length of the stator core;

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

[0022] An end sealing ring is arranged 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 which is installed in the sealing ring stop, and the other end of which extends from the outer end surface of the stator pressure plate boss into the stator to the positioning block; a second annular groove is arranged on the outer surface of the end sealing ring extending into the stator; a sealing ring is installed in the second annular groove;

[0023] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

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

[0025] According to another aspect of the present invention, another motor with an integrated stator oil cooling seal structure is provided, comprising: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

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

[0027] The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged 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 a "T" shape, the vertical part of which fits the gap between the tooth shoes, the horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially penetrating sealing strip flow channel is arranged therebetween;

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

[0029] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

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

[0031] According to another aspect of the present invention, another motor with an integrated stator oil cooling seal structure is provided, comprising: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

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

[0033] The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged 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 a "T" shape, the vertical part of which fits the gap between the tooth shoes, the horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially penetrating sealing strip flow channel is arranged therebetween;

[0034] The outer diameter of the end sealing ring is the same as the outer diameter of the stator slot sealing strip; an annular sealing ring flow channel is also provided in the middle of the end sealing ring, and a guide hole connected to the sealing ring flow channel is also provided on its outer surface; a plurality of countersunk holes connected to the sealing ring flow channel are also provided at one end of the end sealing ring close to the stator, and the number and position of the countersunk holes correspond to the sealing strip flow channel one by one, and the corresponding countersunk holes and the sealing strip flow channel are connected through a flow pipe;

[0035] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

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

[0037] According to another aspect of the present invention, another motor with an integrated stator oil cooling seal structure is provided, comprising: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

[0038] The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and a stator pressure plate arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged between the tooth shoes of adjacent stator teeth, and the stator slot sealing strip is in a "T" shape, the vertical part of which fits in the gap between the tooth shoes, and the horizontal part is located in the stator slot and contacts the stator tooth tooth shoes, and an axially penetrating sealing strip flow channel is arranged therebetween; the stator pressure plate extends outwardly at the corresponding part with the tooth shoe to form a boss, and a positioning block is arranged on the inner surface of the boss, and the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the boss of the two stator pressure plates;

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

[0040] An end sealing ring is arranged 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 which is installed in the sealing ring stop, and the other end of which extends from the outer end surface of the stator pressure plate boss into the stator to the positioning block; a second annular groove is arranged on the outer surface of the end sealing ring extending into the stator; a sealing ring is installed in the second annular groove;

[0041] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

[0042] The motor provided by the present invention has an integrated stator oil cooling sealing structure. After the cooling medium is injected into the stator cavity from one terminal hole, the cooling medium will flow into the sealing strip flow channel through the outer surface of the end sealing ring and the outer surface of the stator pressure plate boss in sequence, and flow along the sealing strip flow channel to the stator cavity at the other end, and then flow out through another terminal hole to achieve cooling of the motor stator.

[0043] According to another aspect of the present invention, another motor with an integrated stator oil cooling seal structure is provided, comprising: a casing, a stator, an oil separator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

[0044] The oil-isolating sleeve comprises N+1 layers of reinforcing fiber-resin layers and N layers of powder-resin layers which are arranged alternately; the reinforcing fiber-resin layers are formed by mixing reinforcing fiber and resin; the powder-resin layers are divided into alternating magnetic conductive sections and non-magnetic conductive sections along the circumferential direction; the magnetic conductive sections are located corresponding to the tooth surfaces of the stator teeth and are formed by mixing magnetic conductive powder and resin; the non-magnetic conductive sections are located corresponding to the gaps between the stator teeth and are formed by mixing non-magnetic conductive powder and resin;

[0045] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side;

[0046] Wherein, N is a positive integer.

[0047] The motor provided by the present invention has an integrated stator oil cooling sealing structure. When cooling, after the cooling medium is injected into the stator cavity from one terminal hole, the cooling medium will flow into the stator slot along the outer surface of the oil separator sleeve, and flow along the gap of the stator slot to the stator cavity at the other end, and then flow out through another terminal hole to achieve cooling of the motor stator.

[0048] Furthermore, the outer surface and the inner surface of the oil-isolating sleeve are respectively provided with functional layers; the functional layers are used to achieve at least one of the following functions:

[0049] Surface enhancement and corrosion protection.

[0050] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

[0051] (1) In some optional embodiments of the present invention, slot wedges and end sealing rings are used to achieve sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on fixing bolts and does not need to be provided with threaded holes on the stator core, thereby achieving effective sealing.

[0052] (2) In some optional embodiments of the present invention, the sealing between the stator and the rotor is realized by using the slot wedge and the 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 directly in contact with the stator end through the sealing ring, which does not rely on the fixing bolts and does not need to set the threaded holes on the stator core, so that effective sealing can be achieved. On this basis, by setting the guide hole, the flow pipe and other structures, the outer diameter of the end sealing ring is expanded to the same as the outer diameter of the slot wedge, and the thickness of the end sealing ring is increased, thereby further improving the overall mechanical strength.

[0053] (3) In some optional embodiments of the present invention, the sealing between the stator and the rotor is realized by using slot wedges and end sealing rings. 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 directly in contact with the stator end through the sealing ring, which does not rely on fixing bolts and does not need to be provided with threaded holes on the stator core, so that effective sealing can be achieved. On this basis, the stator pressure plate corresponding to the tooth shoe is extended outward to form a boss, and a positioning block is provided so that the end sealing ring is deeply inserted into the stator, and the sealing ring is installed on the circumferential outer surface, which can avoid sealing failure caused by installation defects, motor vibration and other factors, and further increase the sealing reliability.

[0054] (4) In some optional embodiments of the present invention, the structure of the stator slot sealing strip arranged between the tooth boots of adjacent stator teeth is improved to provide a cooling medium flow channel and realize the function of the slot wedge, which can reduce the space occupied in the stator slot and ensure a high slot fill rate; the sealing ring at the end of the stator slot sealing strip is used to achieve sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on fixing bolts and does not need to be provided with threaded holes on the stator core, thereby achieving effective sealing.

[0055] (5) In some optional embodiments of the present invention, the structure of the stator slot sealing strip arranged between the tooth boots of adjacent stator teeth is improved to provide a cooling medium flow channel and realize the function of the slot wedge, which can reduce the space occupied in the stator slot and ensure a high slot fill rate; the sealing ring at the end of the stator slot sealing strip is used to achieve the sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on the fixing bolts and does not need to set the threaded hole on the stator core, so that effective sealing can be achieved. On this basis, by setting the guide hole, the flow pipe and other structures, the outer diameter of the end sealing ring is expanded to the same as the outer diameter of the slot wedge, and the thickness of the end sealing ring is increased, 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 arranged between the tooth boots of adjacent stator teeth is improved to provide a cooling medium flow channel and realize the function of the slot wedge, which can reduce the space occupied in the stator slot and ensure a high slot fill rate; the sealing ring at the end of the stator slot sealing strip is used to achieve the sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on the fixing bolts and does not need to be provided with threaded holes on the stator core, so that effective sealing can be achieved. On this basis, the stator pressure plate corresponding to the tooth boot is extended outward to form a boss, and a positioning block is provided to make the end sealing ring penetrate into the stator, and the sealing ring is installed on the circumferential outer surface, which can avoid sealing failure caused by installation defects, click 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-isolating sleeve is partially improved to be magnetically conductive. The position corresponding to the gap between the oil-isolating sleeve and the stator tooth is non-magnetic, thereby avoiding the generation of large magnetic leakage; the position corresponding to the tooth surface of the oil-isolating sleeve and the stator tooth is magnetically conductive, reducing the sacrifice of the traditional oil-isolating sleeve to the equivalent electromagnetic air gap of the motor and mitigating the influence of the traditional non-magnetic oil-isolating sleeve on the magnetic load of the motor. At the same time, the present invention directly uses the oil-isolating sleeve to achieve effective sealing between the stator and the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A three-dimensional exploded diagram of a motor structure integrated with a stator oil cooling sealing structure provided in Example 1 of the present invention;

[0059] Figure 2 A three-dimensional explosion of the stator structure of the motor integrated with the stator oil cooling sealing structure provided in Example 1 of the present invention;

[0060] Figure 3 A schematic diagram of the structure of a motor housing integrated with a stator oil cooling sealing structure provided in Example 1 of the present invention;

[0061] Figure 4 A schematic diagram of a drive end cover of a motor integrated with a stator oil cooling sealing structure provided in Example 1 of the present invention;

[0062] Figure 5 A schematic diagram of a non-driving end cover of a motor integrated with a stator oil cooling sealing structure provided in Example 1 of the present invention;

[0063] Figure 6 A schematic diagram of a stator slot sealing strip and its installation position in a motor integrated with a stator oil cooling sealing structure provided in Example 1 of the present invention;

[0064] Figure 7 A schematic diagram of a sealing ring at the middle end of a motor integrated with a stator oil cooling sealing structure provided in Example 1 of the present invention;

[0065] Figure 8 A schematic diagram of the flow of cooling medium in a motor integrated with a stator oil cooling sealing structure provided in Example 1 of the present invention;

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

[0067] Fig.10 It is a three-dimensional explosion of the stator structure in the motor integrated with the stator oil cooling sealing structure provided in Example 2 of the present invention;

[0068] Fig.11 Schematic diagram of a motor housing integrated with a stator oil cooling sealing structure provided in Embodiment 2 of the present invention;

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

[0070] Fig.13 This is a schematic diagram of a non-driving end cover of a motor integrated with a stator oil cooling sealing structure provided in Example 2 of the present invention;

[0071] Fig.14 This is a schematic diagram of stator slot sealing strips, slot wedges and their installation positions in a motor integrated with a stator oil cooling sealing structure provided in Example 2 of the present invention;

[0072] Fig.15 Schematic diagram of the end sealing ring of a motor integrated with a stator oil cooling sealing structure provided in Embodiment 2 of the present invention;

[0073] Fig.16This is a schematic diagram of the flow of cooling medium in a motor integrated with a stator oil cooling sealing structure provided in Example 2 of the present invention;

[0074] Fig.17 A three-dimensional exploded view of a stator structure in a motor integrated with a stator oil cooling sealing structure provided in Example 6 of the present invention;

[0075] Fig.18 A schematic structural diagram of a stator pressure plate in a motor with an integrated stator oil cooling sealing structure provided in Example 6 of the present invention;

[0076] Fig.19 A cross-sectional view of a motor integrated with a stator oil cooling sealing structure provided in Example 6 of the present invention;

[0077] Fig. 20 A schematic diagram of the structure of an oil separator sleeve in a motor integrated with a stator oil cooling sealing structure provided in Example 7 of the present invention;

[0078] Throughout the 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-seal ring flow channel, 162-seal ring end surface countersunk hole, 163-first annular groove, 17-slot wedge;

[0080] 2- housing, 21- driving end cover connection hole, 22- non-driving end cover connection hole, 23- stator retaining ring, 24- tooling hole;

[0081] 3- driving end cover, 31- power line terminal hole, 32- signal line terminal hole, 33- driving end stopper, 34- driving end sealing groove, 35- oil inlet terminal hole, 36- driving end cover mounting hole;

[0082] 4-non-driving end cover, 41-non-driving end stopper, 42-non-driving end sealing groove, 43-oil outlet terminal hole, 44-non-driving end cover mounting hole;

[0083] 5- Rotor. DETAILED DESCRIPTION

[0084] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

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

[0086] Embodiment 1:

[0087] A motor with an integrated stator oil cooling seal structure, such as Figure 1 The invention comprises: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

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

[0089] The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged 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 a "T" shape, the vertical part of which fits the gap between the tooth shoes, the horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially penetrating sealing strip flow channel is arranged therebetween;

[0090] The outer diameter of the end sealing ring is the same as the outer diameter of the stator slot sealing strip; an annular sealing ring flow channel is also provided in the middle of the end sealing ring, and a guide hole connected to the sealing ring flow channel is also provided on its outer surface; a plurality of countersunk holes connected to the sealing ring flow channel are also provided at one end of the end sealing ring close to the stator, and the number and position of the countersunk holes correspond to the sealing strip flow channel one by one, and the corresponding countersunk holes and the sealing strip flow channel are connected through a flow pipe;

[0091] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

[0092] The following is a detailed introduction to each structure in the motor with reference to the accompanying drawings.

[0093] In this embodiment, the stator 1 and the housing 2 are installed by interference fit. In this embodiment, the two end covers are respectively used as the driving end cover 3 and the non-driving end cover 4, and the two terminal holes are respectively provided on the driving end cover 3 and the non-driving end cover 4, which serve as the oil inlet and the oil outlet. The rotor 5 is connected to the driving end cover 3 and the non-driving end cover 4 through the front and rear bearings. The entire motor is cantilevered through several mounting holes on the flange of the housing 2.

[0094] like Figure 2As shown, the stator 1 includes a stator core 11, a stator winding 12, a stator pressure plate 13, a stator slot sealing strip 14, a flow tube 15 and an end sealing ring 16. The stator pressure plate 13 is installed on the end faces of both sides of the stator, and is provided with several positioning grooves in the circumference. It can be connected with the corresponding positioning holes in the stator core by positioning pins to constrain its circumferential position; its shape can completely fit with part of the core, and its inner radius is the same as the outer radius of the end sealing ring, which can be used for radial positioning of the end sealing ring. The stator winding 12 is embedded in the tooth slot of the stator core 11, and the winding is not limited to loose wire or flat wire. The stator slot sealing strip 14 acts as a motor slot wedge, which can press the winding to prevent it from loosening; in addition, the contact surface between the stator slot sealing strip 14 and the stator core 11 can be fixed by gluing technology to achieve the sealing of the cooling oil in the stator slot. The stator slot sealing strip is set in a "T" shape, which can ensure sufficient mechanical strength without affecting the slot full rate as much as possible. Two end sealing rings 16 are provided at both ends of the stator 1. One side of the end sealing ring 16 is provided with an annular groove for the installation of the sealing ring. The end faces of the two end sealing rings 16 with the annular groove are arranged opposite to each other and in contact with the end face of the stator. The end sealing ring 16 and the stator slot sealing strip 14 are both provided with 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 tube 15, for the installation of the flow tube 15. At the same time, the flow tube 15 has the function of constraining the tangential position of the end sealing ring 16. It is worth noting that the shape of the flow hole mentioned is not limited to a circle.

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

[0096] like Figure 4 As shown, the drive end cover 3 is cylindrical with a central opening, and has a plurality of 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 end 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 cover mounting hole 36 is provided.

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

[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 tooth boots, and provide sealing effect in conjunction with the adhesive connection; an axially through-going sealing strip flow channel 142 is provided as a slot cooling flow channel; a countersunk hole 141 is provided near the end surface of the stator 11 for the installation of the flow pipe 15.

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

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

[0101] In this embodiment, the structure of the stator slot sealing strip arranged between the tooth boots of adjacent stator teeth is improved to provide a cooling medium flow channel and realize the function of the slot wedge, which can reduce the occupation of the space in the stator slot and ensure a high slot fill rate; the sealing ring at the end of the stator slot sealing strip is used to achieve the sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on the fixing bolts and does not need to set the threaded holes on the stator core, so that effective sealing can be achieved. On this basis, by setting the guide hole, the flow pipe and other structures, the outer diameter of the end sealing ring is expanded to the same as the outer diameter of the stator slot sealing strip, and the thickness of the end sealing ring is increased, thereby further improving the overall mechanical strength.

[0102] Embodiment 2:

[0103] A motor with an integrated stator oil cooling seal structure, such as Fig. 9 As shown, it includes: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

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

[0105] like Fig.10 As shown, the stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes is arranged between the tooth shoes of adjacent stator teeth, and a slot wedge is arranged in the stator slot between adjacent stator teeth, and 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;

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

[0107] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

[0108] The following is a detailed introduction to each structure in the motor with reference to the accompanying drawings.

[0109] In this embodiment, the stator 1 and the housing 2 are installed by interference fit. In this embodiment, the two end covers are respectively used as the driving end cover 3 and the non-driving end cover 4, and the two terminal holes are respectively provided on the driving end cover 3 and the non-driving end cover 4, which serve as the oil inlet and the oil outlet. The rotor 5 is connected to the driving end cover 3 and the non-driving end cover 4 through the front and rear bearings. The entire motor is cantilevered through several mounting holes on the flange of the housing 2.

[0110] like Fig.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 the end faces of both sides of the stator, and is provided with several positioning grooves in the circumference. It can be connected with the corresponding positioning holes in the stator core by using positioning pins to constrain its circumferential position; its shape can completely fit with part of the core, and at the same time, its inner radius is the same as the outer radius of the end sealing ring, which can be used for radial positioning of the end sealing ring. The stator winding 12 is embedded in the tooth slot 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 press the winding to prevent it from loosening. The shape of the stator slot sealing strip 14 and the stator slot opening fits. The contact surface between the stator slot sealing strip 14 and the stator core 11 can be fixed by gluing to achieve the 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 cooling medium flow channel. 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 the sealing ring; the end faces of the two end sealing rings 16 with the annular groove are arranged opposite to each other and contact the stator end face.

[0111] like Fig.11 As shown, the casing 2 is a cylindrical shape with a flange, and its structure is the same as the casing structure in the above-mentioned embodiment 1, with a plurality of drive end cover connecting holes 21 and non-drive end cover connecting holes 22, which are respectively used for positioning and installing the drive end cover 3 and the non-drive end cover 4; at the same time, a stator retaining ring 23 is provided, and a plurality of positioning holes are distributed on it, and the positioning pins of the common stator core 11 and the non-drive end stator pressure plate 13 are used to provide axial and circumferential positioning for the stator 1; a plurality of tooling holes 24 are provided on the flange for cantilever installation of the motor.

[0112] like Fig.12 As shown, the drive end cover 3 is cylindrical with a central opening, and its structure is the same as that of the drive end cover in the above-mentioned embodiment 1, with a plurality of 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 end 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 cover mounting hole 36 is provided.

[0113] like Fig.13 As shown, the non-driving end cover 4 is cylindrical with a central opening, and its structure is the same as that of the non-driving end cover in the above-mentioned embodiment 1, and is provided with a non-driving end stop 41 for installation of the non-driving end side end sealing ring 16; an oil outlet terminal hole 43 is provided for installation of the oil inlet terminal; a non-driving end sealing groove 42 is provided for installation of the sealing ring; and a non-driving end cover mounting hole 44 is provided.

[0114] like Fig.14As shown, the shape of the stator slot sealing strip 14 can completely fit the gap between part of the stator tooth boots, and provide sealing effect in conjunction with the 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 Fig.15 As shown, the end sealing ring 16 is in the shape of a cylindrical shell, and is provided with an annular groove 161 on the end face of the sealing ring for installation of the sealing ring. The outer diameter of the end sealing ring 16 is the same as the outer diameter of the stator slot sealing strip.

[0116] like Fig.16 As shown, in this embodiment, the cooling oil enters from the oil inlet provided 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 is discharged from the stator oil outlet provided on the non-drive end cover. In practical applications, the cooling medium can be cooling oil or other liquid or gas cooling medium.

[0117] This embodiment utilizes the stator slot sealing strip and the end sealing ring to achieve sealing between the stator and the rotor. 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 end sealing ring is installed on the sealing ring stop provided on the end cover, and the other end is directly in contact with the stator end through the sealing ring. It does not rely on fixing bolts and does not need to set threaded holes on the stator core, so effective sealing can be achieved.

[0118] Embodiment 3:

[0119] A motor integrated with a stator oil cooling sealing structure comprises: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing.

[0120] This embodiment is similar to the above-mentioned embodiment 2, except that, in this embodiment, a "T"-shaped stator slot sealing strip provided with a sealing strip flow channel is used to simultaneously realize the function of a slot wedge as in embodiment 1. Accordingly, the stator comprises: a stator core and a stator winding embedded in the tooth slot of the stator core, and a stator pressure plate provided at both ends of the stator core; in the stator core, a stator slot sealing strip is provided between the tooth boots 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 a "T" shape, the vertical part of which fits in the gap between the tooth boots, the horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially penetrating sealing strip flow channel is provided 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, when cooling, after the cooling medium is injected into the stator cavity from one terminal hole, the cooling medium will flow into the sealing strip flow channel along the outer surface of the end sealing ring, and flow along the sealing strip flow channel to the stator cavity at the other end, and then flow out through another terminal hole, thereby cooling the motor stator.

[0122] In this embodiment, the structure of the stator slot sealing strip arranged between the tooth boots of adjacent stator teeth is improved to provide a cooling medium flow channel and realize the function of the slot wedge, which can reduce the occupation of the space in the stator slot and ensure a high slot fill rate; the sealing ring at the end of the stator slot sealing strip is used to achieve the sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on fixing bolts and does not need to be provided with threaded holes on the stator core, so that effective sealing can be achieved.

[0123] In this embodiment, the specific implementation of the stator slot sealing strip can refer to the description in the above embodiment 1, and the remaining structures can refer to the description in the above embodiment 2.

[0124] Embodiment 4:

[0125] A motor integrated with a stator oil cooling sealing structure comprises: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing.

[0126] The structure of this embodiment is similar to that of the above-mentioned embodiment 3, except that Fig.17 As shown, the sealing structure between the end sealing ring and the stator is different. Considering that the sealing ring is arranged on the axial end surface of the end sealing ring, the sealing effect will be affected due to installation defects, motor vibration and other factors. Therefore, the sealing structure between the end sealing ring and the stator is improved in this embodiment.

[0127] like Fig.17 and Fig.18 As shown, in this embodiment, the stator includes: a stator core and a stator winding embedded in the tooth slots of the stator core, and a stator pressure plate arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged between the tooth boots of adjacent stator teeth, and the stator slot sealing strip is in a "T" shape, the vertical part of which fits with the gap between the tooth boots, and the horizontal part is located in the stator slot and contacts with the stator tooth tooth boots, and an axially penetrating sealing strip flow channel is arranged therebetween; the stator pressure plate extends outwardly at the corresponding part with the tooth boot to form a boss, and a positioning block is arranged 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 boss 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 surface of the end cover;

[0129] An end sealing ring is provided between each end cover and the stator; Fig.18 As shown, 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 of the end sealing ring extends from the outer end surface of the stator pressure plate boss into the stator to the positioning block; the outer surface of the end sealing ring extending into the stator is provided with a second annular groove; and a sealing ring is installed in the second annular groove;

[0130] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

[0131] like Fig.19 As shown, the motor provided by the present embodiment has an integrated stator oil cooling sealing structure. After the cooling medium is injected into the stator cavity from a terminal hole, the cooling medium will flow into the flow channel in the slot through the outer surface of the end sealing ring and the outer surface of the stator pressure plate boss in sequence, and flow along the flow channel in the slot to the stator cavity at the other end, and then flow out through another terminal hole to achieve cooling of the motor stator.

[0132] This embodiment uses the stator slot sealing strip and the end sealing ring to achieve the sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on the fixing bolts and does not need to be provided with threaded holes on the stator core, so that effective sealing can be achieved. On this basis, the stator pressure plate is extended outward at the corresponding position of the tooth shoe to form a boss, and a positioning block is provided so that the end sealing ring is deeply inserted into the stator, and the sealing ring is installed on the circumferential outer surface, which can avoid the sealing failure caused by installation defects, click vibration and other factors, and further increase the sealing reliability.

[0133] Embodiment 5:

[0134] A motor integrated with a stator oil cooling sealing structure comprises: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing.

[0135] This embodiment is similar to the above-mentioned embodiment 1, except that, as in the above-mentioned embodiment 2, a stator slot sealing strip that matches the gap between the tooth shoes is provided between the tooth shoes of adjacent stator teeth, and 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. And the two end sealing rings are connected to the flow channel in the slot through the countersunk hole and the through-flow pipe.

[0136] The motor provided by the present embodiment has an integrated stator oil cooling sealing structure. When cooling, after the cooling medium is injected into the stator cavity from a terminal hole, the cooling medium will flow into the sealing ring flow channel in the end sealing ring along the guide hole on the outer surface of the end sealing ring, and then flow into the flow channel in the groove through the flow pipe and flow along the flow channel in the groove to the other end, and then flow out into the stator cavity through the sealing ring flow channel and the guide hole in the end sealing ring at the other end in turn, and finally flow out through another terminal hole to achieve cooling of the motor stator.

[0137] This embodiment uses slot wedges and end sealing rings to achieve sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on fixing bolts and does not need to be provided with threaded holes on the stator core, so that effective sealing can be achieved. On this basis, by providing structures such as guide holes and flow pipes, the outer diameter of the end sealing ring is expanded to the same as the outer diameter of the slot wedge, and the thickness of the end sealing ring is increased, thereby further improving the overall mechanical strength.

[0138] Embodiment 6:

[0139] A motor integrated with a stator oil cooling sealing structure comprises: a casing, a stator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing.

[0140] This embodiment is similar to the above-mentioned embodiment 4, except that, as in the above-mentioned embodiment 2, a stator slot sealing strip that matches the gap between the tooth shoes is provided between the tooth shoes of adjacent stator teeth, and 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. And the two end sealing rings are connected to the flow channel in the slot through the countersunk hole and the through-flow pipe.

[0141] The motor provided in the present embodiment has an integrated stator oil cooling sealing structure. When cooling, after the cooling medium is injected into the stator cavity from one terminal hole, the cooling medium will flow into the flow channel in the groove through the outer surface of the end sealing ring and the outer surface of the stator pressure plate boss in sequence, and flow along the flow channel in the groove to the stator cavity at the other end, and then flow out through another terminal hole to achieve cooling of the motor stator.

[0142] This embodiment uses slot wedges and end sealing rings to achieve sealing between the stator and the rotor. 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 directly in contact with the stator end through the sealing ring, which does not rely on fixing bolts and does not need to be provided with threaded holes on the stator core, so that effective sealing can be achieved. On this basis, the stator pressure plate corresponding to the tooth shoe is extended outward to form a boss, and a positioning block is provided so that the end sealing ring is deeply inserted into the stator, and the sealing ring is installed on the circumferential outer surface, which can avoid sealing failure caused by installation defects, click vibration and other factors, and further increase the sealing reliability.

[0143] Embodiment 7:

[0144] A motor with an integrated stator oil cooling sealing structure comprises: a casing, a stator, an oil separator and a rotor arranged in sequence from the outside to the inside, and two end covers respectively arranged at both ends of the casing;

[0145] like Fig. 20 As shown, the oil-isolating sleeve includes N+1 layers of reinforcing fiber-resin layers and N layers of powder-resin layers which are alternately arranged; the reinforcing fiber-resin layer is formed by mixing reinforcing fiber and resin, and the reinforcing fiber can be selected from carbon fiber, glass fiber, etc.; the powder-resin layer is divided into alternating magnetic conductive sections and non-magnetic conductive sections along the circumferential direction; the magnetic conductive sections are located corresponding to the tooth surfaces of the stator teeth, and are formed by mixing magnetic conductive powder and resin, and the magnetic conductive powder can be selected from metal magnetic powder, Fe-based amorphous alloy powder, etc.; the non-magnetic conductive sections are located corresponding to the gaps between the stator teeth, and are formed by mixing non-magnetic conductive powder and resin, and the non-magnetic conductive section powder can be selected from ceramic powder, etc.;

[0146] The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side;

[0147] Wherein, N is a positive integer; in this embodiment, multiple layers of reinforced fiber-resin layers and powder-resin layers are alternately arranged to effectively ensure the overall mechanical strength of the oil-isolating sleeve.

[0148] The motor provided in the present embodiment has an integrated stator oil cooling sealing structure. When cooling, after the cooling medium is injected into the stator cavity from one terminal hole, the cooling medium will flow into the stator slot along the outer surface of the oil separator sleeve, and flow along the gap of the stator slot to the stator cavity at the other end, and then flow out through another terminal hole to achieve cooling of the motor stator.

[0149] In this embodiment, the oil-isolating sleeve is non-magnetic at the position corresponding to the gap between the stator teeth, thereby avoiding the generation of large magnetic leakage; the oil-isolating sleeve is magnetic at the position corresponding to the stator tooth surface, which is equivalent to not occupying the electromagnetic air gap of the motor at the stator teeth, thereby avoiding the influence on the magnetic circuit of the stator teeth, and further avoiding the influence on the magnetic load of the motor. At the same time, the present invention directly uses the oil-isolating sleeve to achieve the sealing between the stator and the rotor, does not rely on fixing bolts, and does not need to set threaded holes on the stator core, so that effective sealing can be achieved.

[0150] As a preferred implementation, in this embodiment, the outer surface and the inner surface of the oil separator are also provided with functional layers respectively, for achieving functions such as surface enhancement and corrosion protection.

[0151] It will be easily understood by those skilled in the art that the above description is only 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 in the protection scope of the present invention.

Claims

1. A motor integrated with a stator oil cooling sealing structure, characterized in that: include: A casing, a stator and a rotor are sequentially arranged from the outside to the inside, and two end covers are respectively arranged at both ends of the casing; An end sealing ring is arranged between each end cover and the stator; an annular sealing ring stop is arranged on the inner end surface of the end cover; the end sealing ring is cylindrical, one end of which is installed in the sealing ring stop, and the other end is in contact with the stator, and a first annular groove is arranged on the end surface of the end in contact with the stator; a sealing ring is installed in the first annular groove; The stator comprises: a stator core and a stator winding embedded in a tooth slot of the stator core, and a stator pressure plate arranged at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes is arranged between the tooth shoes of adjacent stator teeth, a slot wedge is arranged in the stator slot between adjacent stator teeth, and 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; The outer diameter of the end sealing ring is the same as the outer diameter of the stator slot sealing strip; The end cover or casing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

2. A motor with an integrated stator oil cooling seal structure, characterized in that: include: A casing, a stator and a rotor are sequentially arranged from the outside to the inside, and two end covers are respectively arranged at both ends of the casing; An end sealing ring is arranged between each end cover and the stator; an annular sealing ring stop is arranged on the inner end surface of the end cover; the end sealing ring is cylindrical, one end of which is installed in the sealing ring stop, and the other end is in contact with the stator, and a first annular groove is arranged on the end surface of the end in contact with the stator; a sealing ring is installed in the first annular groove; The stator comprises: a stator core and a stator winding embedded in a tooth slot of the stator core, and a stator pressure plate arranged at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes is arranged between the tooth shoes of adjacent stator teeth, a slot wedge is arranged in the stator slot between adjacent stator teeth, and 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; The outer diameter of the end sealing ring is the same as the outer diameter of the slot wedge; an annular sealing ring flow channel is also provided in the middle of the end sealing ring, and a guide hole connected to the sealing ring flow channel is also provided on its outer surface; a plurality of countersunk holes connected to the sealing ring flow channel are also provided at one end of the end sealing ring close to the stator, and the number and position of the countersunk holes correspond to the flow channel in the slot one by one, and the corresponding countersunk holes are connected to the flow channel in the slot through a flow pipe; The end cover or casing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

3. A motor with an integrated stator oil cooling seal structure, characterized in that: include: A casing, a stator and a rotor are sequentially arranged from the outside to the inside, and two end covers are respectively arranged at both ends of the casing; The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and a stator pressure plate arranged at both ends of the stator core; in the stator core, a stator slot sealing strip that matches the gap between the tooth shoes is arranged between the tooth shoes of adjacent stator teeth, a slot wedge is arranged in the stator slot between adjacent stator teeth, and a certain gap exists 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; the stator pressure plate extends outwardly at the corresponding position with the tooth shoe to form a boss, and a positioning block is arranged on the inner surface of the boss, and the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the boss 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 surface of the end cover; An end sealing ring is arranged 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 which is installed in the sealing ring stop, and the other end of which extends from the outer end surface of the stator pressure plate boss into the stator to the positioning block; the outer surface of the end sealing ring extending into the stator is provided with a second annular groove; a sealing ring is installed in the second annular groove; The end cover or casing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

4. A motor with an integrated stator oil cooling seal structure, characterized in that: include: A casing, a stator and a rotor are sequentially arranged from the outside to the inside, and two end covers are respectively arranged at both ends of the casing; An end sealing ring is arranged between each end cover and the stator; an annular sealing ring stop is arranged on the inner end surface of the end cover; the end sealing ring is cylindrical, one end of which is installed in the sealing ring stop, and the other end is in contact with the stator, and a first annular groove is arranged on the end surface of the end in contact with the stator; a sealing ring is installed in the first annular groove; The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged 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 a "T" shape, the vertical part of the stator slot sealing strip fits in the gap between the tooth shoes, the horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially penetrating sealing strip flow channel is arranged therebetween; The outer diameter of the end sealing ring is the same as the outer diameter of the stator core tooth shoe; The end cover or casing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

5. A motor with an integrated stator oil cooling seal structure, characterized in that: include: A casing, a stator and a rotor are sequentially arranged from the outside to the inside, and two end covers are respectively arranged at both ends of the casing; An end sealing ring is arranged between each end cover and the stator; an annular sealing ring stop is arranged on the inner end surface of the end cover; the end sealing ring is cylindrical, one end of which is installed in the sealing ring stop, and the other end is in contact with the stator, and a first annular groove is arranged on the end surface of the end in contact with the stator; a sealing ring is installed in the first annular groove; The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and stator pressure plates arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged 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 a "T" shape, the vertical part of the stator slot sealing strip fits in the gap between the tooth shoes, the horizontal part is located in the stator slot and contacts the stator tooth shoe, and an axially penetrating sealing strip flow channel is arranged therebetween; The outer diameter of the end sealing ring is the same as the outer diameter of the stator slot sealing strip; an annular sealing ring flow channel is also provided in the middle of the end sealing ring, and a guide hole connected to the sealing ring flow channel is also provided on its outer surface; a plurality of countersunk holes connected to the sealing ring flow channel are also provided at one end of the end sealing ring close to the stator, and the number and position of the countersunk holes correspond to the sealing strip flow channel one by one, and the corresponding countersunk holes and the sealing strip flow channel are connected through a flow pipe; The end cover or casing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

6. A motor with an integrated stator oil cooling seal structure, characterized in that: include: A casing, a stator and a rotor are sequentially arranged from the outside to the inside, and two end covers are respectively arranged at both ends of the casing; The stator comprises: a stator core and a stator winding embedded in the tooth slots of the stator core, and a stator pressure plate arranged at both ends of the stator core; in the stator core, a stator slot sealing strip is arranged between the tooth boots of adjacent stator teeth, and the stator slot sealing strip is in a "T" shape, the vertical part of which fits in the gap between the tooth boots, and the horizontal part is located in the stator slot and contacts the stator tooth tooth boots, and an axially penetrating sealing strip flow channel is arranged therebetween; the stator pressure plate extends outwardly at the corresponding part with the tooth boot to form a boss, and a positioning block is arranged on the inner surface of the boss, and the length of the stator slot sealing strip is the same as the axial distance between the outer end faces of the boss of the two stator pressure plates; An annular sealing ring stop is provided on the inner end surface of the end cover; An end sealing ring is arranged 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 which is installed in the sealing ring stop, and the other end of which extends from the outer end surface of the stator pressure plate boss into the stator to the positioning block; the outer surface of the end sealing ring extending into the stator is provided with a second annular groove; a sealing ring is installed in the second annular groove; The end cover or casing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side.

7. A motor integrated with a stator oil cooling seal structure, characterized in that: include: A casing, a stator, an oil separator and a rotor are sequentially arranged from the outside to the inside, and two end covers are respectively arranged at both ends of the casing; The oil-isolating sleeve comprises N+1 layers of reinforcing fiber-resin layers and N layers of powder-resin layers arranged alternately; the reinforcing fiber-resin layers are formed by mixing reinforcing fibers and resin; the powder-resin layers are divided into alternating magnetic conductive sections and non-magnetic conductive sections along the circumferential direction; the magnetic conductive sections are located corresponding to the tooth surfaces of the stator teeth and are formed by mixing magnetic conductive powder and resin; the non-magnetic conductive sections are located corresponding to the gaps between the stator teeth and are formed by mixing non-magnetic conductive powder and resin; The end cover or housing at each end of the motor is provided with a terminal hole connected to the stator cavity on the same side; Wherein, N is a positive integer.

8. The motor with integrated stator oil cooling sealing structure as claimed in claim 7, characterized in that: The outer surface and the inner surface of the oil isolation sleeve are also provided with functional layers respectively; the functional layers are used to achieve at least one of the following functions: Surface enhancement and corrosion protection.

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