Stator cooling system, stator structure, rotation driving part and carrying equipment

Abstract

The invention discloses a stator cooling system, a stator structure, a rotation driving part and carrying equipment. The stator cooling system is used for installing a stator module and comprises a shell assembly and a sealing assembly. The shell assembly comprises a shell and inner shells, the inner shells are arranged in a surrounding mode to define a rotor installation cavity, and the inner shells coaxially penetrate through the shell and are arranged at intervals to define a stator cooling cavity. The stator cooling system is provided with a stator cooling input part and a stator cooling output part; the stator cooling input part and the stator cooling output part are communicated with the stator cooling cavity; and the sealing assembly is arranged between the shell and the inner shell and is used for sealing the stator cooling cavity and isolating the stator cooling cavity from the rotor mounting cavity. The stator cooling cavity is separated from the internal space of the shell and the rotor mounting cavity, so that the stator cooling cavity is independently arranged, an independent cooling loop is formed in the stator cooling cavity through the stator cooling input part and the stator cooling output part, and the cooling speed of the stator structure can be increased.

Description

Technical Field

[0001] The present application relates to the technical field of motor cooling, and more specifically, to a stator cooling system, a stator structure, a rotating drive member and a carrying device. Background Art

[0002] As a driving structure, the inner rotor motor will generate a lot of heat in its rotor structure when working. It is necessary to cool the stator and rotor structures of the motor to avoid overheating of the stator and rotor structures, which will cause internal short circuit of the motor and shorten the service life of the motor.

[0003] Traditional motors generally have only one coolant passage, which passes through the rotor structure and the stator structure in turn to cool the entire motor. However, the coolant passage is long, and the coolant temperature is already high after passing through the rotor structure. The cooling effect on the stator structure is not obvious at a later stage, and the temperature of the stator structure drops slowly, so the motor may still short-circuit. Summary of the invention

[0004] Embodiments of the present application provide a stator cooling system, a stator structure, a rotating drive component, and a transport device.

[0005] According to the first aspect of the present application, an embodiment of the present application provides a stator cooling system, the stator cooling system is used to install a stator module, the stator module is used to drive the rotor structure to rotate, and the stator cooling system includes a shell assembly and a sealing assembly. The shell assembly includes a shell and an inner shell, the inner shell circumferentially defines a rotor installation cavity for installing the rotor structure, the inner shell is coaxially arranged in the shell, the shell and the inner shell are spaced to jointly define a stator cooling cavity for installing the stator module, the stator cooling system is provided with a stator cooling input part and a stator cooling output part, the stator cooling input part and the stator cooling output part are both connected to the stator cooling cavity; the sealing assembly is arranged between the shell and the inner shell, the sealing assembly is used to seal the stator cooling cavity, and isolate the stator cooling cavity from the rotor installation cavity.

[0006] According to the second aspect of the present application, an embodiment of the present application further provides a stator structure, which includes a stator module and the above-mentioned stator cooling system.

[0007] According to the third aspect of the present application, an embodiment of the present application provides a rotating drive component, which includes a rotor structure and the above-mentioned stator structure, the rotor structure is installed on the shell, the rotor structure is penetrated by the inner shell, and the rotor structure and the stator structure are rotatably matched.

[0008] According to a fourth aspect of the present application, an embodiment of the present application provides a transport device, the transport device comprising a body and the above-mentioned rotating drive member, wherein the rotating drive member is mounted on the body.

[0009] The present application provides a stator cooling system, a stator structure, a rotating drive member and a carrier. The stator cooling system is used to install and cool the stator module. The stator cooling system includes a shell and an inner shell, the inner shell is coaxially arranged in the shell, and the inner shell and the shell are spaced apart, a stator cooling cavity is defined between the inner shell and the shell, and the stator module is arranged in the stator cooling cavity. The inner shell is arranged around and defines a rotor installation cavity for accommodating the rotor structure. The shell has an internal space, and the stator cooling cavity and the rotor installation cavity are both located in the internal space of the shell. In this embodiment, a sealing assembly is arranged between the shell and the inner shell to seal the stator cooling cavity, and the stator cooling cavity is separated from the internal space of the shell and the rotor installation cavity to achieve an independent arrangement. In addition, the stator cooling system is provided with a stator cooling input part and a stator cooling output part, both of which are connected to the stator cooling cavity to provide coolant to the stator cooling cavity separately, which can increase the cooling speed of the internal structure of the stator cooling cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a schematic diagram of the structure of the transport equipment provided in the embodiment of the present application.

[0012] Figure 2 It is a schematic diagram of the structure of the rotating drive member provided in an embodiment of the present application.

[0013] Figure 3 It is a structural schematic diagram of the stator structure provided in an embodiment of the present application.

[0014] Figure 4 It is a structural schematic diagram of the stator cooling system provided in an embodiment of the present application.

[0015] Figure 5 yes Figure 3 A schematic structural diagram of a stator module of a stator structure shown.

[0016] Figure 6 yes Figure 5 A partial enlarged view of the stator module A is shown.

[0017] Figure 7 yes Figure 6 Schematic diagram of the structure of the slot wedge shown.

[0018] Figure 8 yes Figure 4 The stator cooling cavity is shown as a schematic structural diagram of being divided into two sub-cooling cavities.

[0019] Fig. 9 yes Figure 8 Schematic diagram of the structure of the collecting groove on the sealing assembly shown.

[0020] Fig.10 yes Figure 8 The schematic diagram of the structure of the collecting groove and the sealing end cover shown.

[0021] Fig.11 This Figure 4 Schematic diagram of the structure of the pipeline assembly shown.

[0022] Fig.12 It is a structural schematic diagram of the rotor structure provided in an embodiment of the present application.

[0023] Fig.13 It is a schematic diagram of the structure of the rotating shaft assembly provided in an embodiment of the present application.

[0024] Fig.14 yes Fig.13 A schematic structural diagram of the cooperation between the first shaft portion and the first bearing is shown.

[0025] Fig.15 yes Fig.14 A partial enlarged view of the shaft assembly B is shown. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0027] See also Figure 1, the embodiment of the present application provides a transport device 1000, and the transport device 1000 includes but is not limited to a transportation vehicle for carrying people or goods, such as a sedan, an SUV, and a van. The transport device 1000 includes a body 400, a travel system, and a rotating drive member 900, etc. A compartment 410 is formed inside the body for users to ride or to accommodate goods. The rotating drive member 900 is generally arranged in the accommodation space at the bottom of the body 400, and forms a driving connection relationship with the travel system of the transport device 1000. In some embodiments, the transport device 1000 can also be a manned aircraft, and its travel system may include a rotor, which is connected to the rotation output end of the rotating drive member 900 to rotate under the drive of the rotating drive member 900, thereby providing the transport device 1000 with power for flight. In other embodiments, the carrier 1000 may also be a flying car, whose travel system may include wheels and axles, wherein the axles are connected to the rotation output end of the rotating drive member 900 so as to rotate under the drive of the rotating drive member 900, thereby providing power for the carrier 1000 to travel on land.

[0028] See also Figure 2 The embodiment of the present application also provides a rotary drive member 900, which can be applied to multiple fields, such as the above-mentioned carrier 1000 and flying car, as well as pumping devices, manufacturing equipment, etc. The rotary drive member 900 can be a rotary drive element such as a rotary motor, a rotary cylinder, a rotary servo, etc. In this embodiment, the rotary drive member 900 includes a stator structure 700 and a rotor structure 500. The stator structure 700 includes a shell 910, an inner shell 920 and a stator module 930, and the rotor structure 500 includes a shaft assembly 100 and a rotor 510. The stator structure 700 is arranged around the outer circumference of the rotor structure 500 at intervals. After the rotary drive member 900 is powered on, the stator structure 700 and the rotor structure 500 cooperate with each other, and the rotor structure 500 rotates relative to the stator structure 700.

[0029] The housing 910 includes a first cover 911, a main housing 912, and a second cover 913 along its axial direction. The main housing 912 defines an internal space of the housing 910, and the internal space is arranged at opposite ends of the main housing 912. The first cover 911 and the second cover 913 respectively close the two ends of the main housing 912. The inner housing 920 is arranged in the internal space, and the inner housing 920 is coaxially arranged with the main housing 912, and the inner housing 920 and the main housing 912 are arranged at intervals, so that a stator cooling cavity 9121 is defined between the inner housing 920 and the main housing 910. The stator cooling cavity 9121 is sealed (for example, a sealing connection between the inner housing 920 and the main housing 910 is achieved by a sealing cover, a sealing ring, etc.). The stator cooling cavity 9121 is used to accommodate the stator module 930, and the stator module 930 is arranged around the outer periphery of the inner housing 920. The stator cooling cavity 9121 is also used to store coolant and allow the coolant to flow, so as to cool the stator module 930 through the coolant.

[0030] The inner shell 920 is arranged in a sleeve shape and defines a rotor installation cavity 921. Therefore, the stator cooling cavity 9121 and the rotor installation cavity 921 are separated by the inner shell 920. The rotor structure 500 is arranged in the inner shell 920 and is at least partially located in the rotor installation cavity 921. The rotor installation cavity 921 is located in the internal space of the housing 910, and the rotor installation cavity 921 is connected to the internal space to form a cooling cavity 9122. In this embodiment, the inner shell 920 is a structure made of carbon fiber material. The inner shell 920 made of carbon fiber can first significantly reduce the overall weight of the rotating drive member 900, thereby achieving lightweighting of the rotating drive member 900. And the carbon fiber motor can convert electrical energy into mechanical energy more efficiently. At the same power, the carbon fiber motor can generate higher torque and power, so that the car has better acceleration performance and driving experience. In some other embodiments, the inner shell 920 is a structure made of metal material. The inner shell 920 made of metal material has higher hardness, greater strength, and more stable structure. Moreover, metal materials have good thermal conductivity and can dissipate heat quickly. The materials of other components of the rotary drive member 900 such as the outer shell 910 and other structures can be set with reference to the inner shell 920, and will not be described in detail here.

[0031] At least part of the rotor structure 500 is disposed in the cooling chamber 9122, and the rotor structure 500 is coaxially disposed with the main housing 912. The rotating shaft assembly 100 of the rotor structure 500 has a first shaft portion 137 and a second shaft portion 138 in the axial direction thereof, and a liquid guiding chamber 11 is disposed between the first shaft portion 137 and the second shaft portion 138. The liquid guiding chamber 11 is formed with a first liquid outlet channel 112 at the first shaft portion 137, and the first liquid outlet channel 112 is disposed in communication with the cooling chamber 9122. The liquid guiding chamber 11 is formed with a first liquid inlet channel 111 at the second shaft portion 138, and the first liquid inlet channel 111 is disposed in communication with the supply device. The first shaft portion 137 is disposed correspondingly to the first cover body 911, and the first shaft portion 137 is mounted on the first cover body 911 through the first bearing 914, and the first shaft portion 137 passes through the first cover body 911 and extends to the outside of the housing 910 to serve as the output end of the rotating drive member 900. The second shaft portion 138 is arranged corresponding to the second cover body 913, and the second shaft portion 138 is installed on the second cover body 913 through the second bearing 915. The supply device is connected to the first liquid inlet channel 111. The coolant enters the liquid guide cavity 11 through the first liquid inlet channel 111, and then enters the cooling cavity 9122 through the liquid guide cavity 11 to cool the rotor structure 500.

[0032] See also Figure 3 and Figure 4 The stator structure 700 provided in the embodiment of the present application includes a stator module 930 and a stator cooling system 600 for cooling the stator module 930 , and the stator module 930 is disposed in the stator cooling system 600 .

[0033] First, let's introduce the stator module 930. Figure 5, the stator module 930 in the embodiment of the present application may include a stator yoke 931, a plurality of stator teeth 932 and a plurality of windings 933. The stator yoke 931 is arranged around the outer periphery of the inner shell 920, and a plurality of stator teeth 932 are arranged around the outer periphery of the stator yoke 931 in sequence and at intervals, and a winding slot 934 is defined between two adjacent stator teeth 932. The embodiment of the present application does not specifically limit the relative position state of the stator teeth 932 and the stator yoke 931. The extension direction of the stator teeth 932 can be arranged parallel to the axial direction of the stator yoke 931, or can be arranged to intersect. In this embodiment, for the convenience of illustration, the extension direction of the stator teeth 932 is arranged in the same direction as the axial direction of the stator yoke 931, and thus the direction of the winding slots 934 is the same as the axial direction of the stator yoke 931. The plurality of stator teeth 932 are arranged in one-to-one correspondence with the plurality of windings 933, and each winding 933 is wound on a corresponding stator tooth 932 to form a plurality of coils 9331, and the plurality of coils 9331 are sequentially arranged along the radial direction of the stator yoke 931. In the stator cooling cavity 9121, the coolant infiltrates the stator module 930, and part of the coolant flows in the winding slots 934. During the flow, the coolant can cool the winding 934 part located in the winding slots 933, the stator yoke 931, and the stator teeth 932.

[0034] See also Figure 5 In some embodiments, in order to improve the cooling effect of the coolant on the stator yoke 931, a guide hole 9311 may be provided on the stator yoke 931. The guide hole 9311 is provided in the stator yoke 931 along the axial direction of the stator yoke 931, so that the coolant can flow into the guide hole 9311, thereby further cooling the stator yoke 931. In order to ensure that the magnetic field generated by the winding 933 is not affected, the guide groove 9311 may be provided at a position corresponding to the stator yoke 931 and the winding groove 934, that is, the guide groove 9311 is provided away from the stator teeth 932. On any diameter of the stator yoke 931, it is impossible for the stator teeth 932 and the guide groove 9311 to appear at the same time, so as to avoid the guide groove 9311 affecting the magnetic field generated by the stator module 930.

[0035] See also Figure 5 and Figure 6In order to improve the cooling effect of the coolant on the winding 933, in this embodiment, the stator module 930 may further include a plurality of slot wedges 935, and the plurality of slot wedges 935 are arranged one-to-one with the plurality of winding slots 934, and each slot wedge 935 is embedded in a corresponding winding slot 934. The extending direction of the slot wedge 935 in the winding slot 934 is substantially consistent with the extending direction of the winding slot 934, and both extend along the axial direction of the stator module 930. When the slot wedge 935 is not arranged in the winding slot 934, the cross-sectional area of ​​the flow channel of the coolant in the winding slot 934 is substantially the cross-sectional area of ​​the winding slot 934. When the slot wedge 935 is arranged in the winding slot 934, the flow channel of the coolant in the winding slot 934 is changed, and the flow channel changes from the winding slot 934 to the gap between the winding slot 934 and the slot wedge 935. After the slot wedge 935 is set in the winding slot 934, the cross-sectional area of ​​the flow channel of the coolant in the winding slot 934 is greatly reduced. When the input flow rate of the supply device remains unchanged, after the coolant enters the stator cooling cavity 9121, the flow rate of the coolant in the winding slot 934 is significantly improved, and then the heat transfer coefficient of the coolant is also improved, and each unit volume of the coolant is fully exchanged with the winding 933, the stator yoke 931 and the stator teeth 932 and other structures, greatly improving the utilization rate of the coolant. This embodiment does not specifically limit the method for increasing the flow rate of the coolant. In addition to increasing the flow rate of the coolant in the winding slot 934 by setting the slot wedge 935, it can also be achieved by increasing the coolant output rate of the supply device.

[0036] See also Figure 6 In order to further improve the cooling effect of the coolant on the winding 933, the slot wedge 935 of the embodiment of the present application may include a main body 9351 and a protrusion 9352. The main body 9351 extends in the winding slot 934 along the axial direction of the stator module 930, and the main body 9351 is spaced from the winding 933 in the winding slot 934, leaving a gap for the coolant to flow. The protrusion 9352 is located on the side of the main body 9351 facing the winding 933, and protrudes relative to the main body 9351 in the direction close to the winding 933, so as to further reduce the cross-sectional area of ​​the flow channel of the coolant in the winding slot 934.

[0037] It should be noted that the protrusion 9352 can be located at the edge of the main body 9351 facing the winding 933, or at the middle of the main body 9351 facing the winding 933. The embodiment of the present application does not impose specific restrictions on this. The protrusion 9352 in this embodiment is arranged at the middle of the main body 9351 facing the winding 933 to separate a larger gap between the main body 9351 and the winding slot 933 into two smaller gaps. According to the above content, the flow rate of the coolant in the two smaller gaps is further improved, and the cooling effect of the coolant on the winding 933 is also improved.

[0038] In this embodiment, due to the arrangement of the protrusion 9352, the surface of the main body 9351 facing the winding 933 is divided into a first guide surface 9353 and a second guide surface 9354, and the first guide surface 9353 and the second guide surface 9354 are still arranged at intervals from the winding 933. The first guide surface 9353 is close to the inner shell 920, the second guide surface 9354 is close to the shell 910, and the protrusion 9352 is located between the first guide surface 9353 and the second guide surface 9354. According to the extension direction of the slot wedge 935, the extension direction of the first guide surface 9353 and the second guide surface 9354 is the same as the axial direction of the stator module 930.

[0039] See also Figure 6 and Figure 7 , it can be understood that the first guide surface 9353 corresponds to a portion of the coil 9331. For the sake of convenience of explanation and understanding, the portion of the coil 9331 is defined as the first coil group 9332. Similarly, the portion of the coil 9331 corresponding to the second guide surface 9354 is defined as the second coil group 9333. The embodiment of the present application does not specifically limit the size of the first guide surface 9353 and the size of the second guide surface 9354. The two sizes can be set to be the same, or can be set to be one large and one small. In this embodiment, the size of the first guide surface 9353 is smaller than the size of the second guide surface 9354. The gap between the first guide surface 9353 and the winding 933 is smaller, the flow rate of the coolant between the first guide surface 9353 and the winding 933 is faster, and the heat exchange coefficient of the coolant is higher, which can further quickly reduce the temperature of the first coil group 9332. The first coil group 9332 is closer to the rotor structure 500 than the second coil group 9333, and the temperature of the first coil group 9332 is higher. The size setting of the first guide surface 9353 and the second guide surface 9354 in this embodiment can solve this technical problem. It can be inferred that because the size of the first guide surface 9353 is smaller than the size of the second guide surface 9354, the number of coils 9331 in the first coil group 9332 is less than the number of coils 9331 in the second coil group 9333.

[0040] See also Figure 4, the stator cooling system 600 provided in the embodiment of the present application is introduced next. Specifically, a stator cooling system 600 provided in the embodiment of the present application can be understood as a combination of structures constituting the stator cooling cavity 9121. In order to form a sealed stator cooling cavity 9121 and enable the coolant in the stator cooling cavity 9121 to be continuously updated, the stator cooling system 600 in this embodiment, in addition to the shell 910 and the inner shell 920 mentioned above, also includes a sealing assembly 940, a stator cooling input portion 950 and a stator cooling output portion 960. The sealing assembly 940 is used to seal the stator cooling cavity 9121. The stator cooling input portion 950 is used for allowing the coolant to pass through and enter the stator cooling cavity 9121, and the stator cooling output portion 960 is used for allowing the coolant to pass through and flow out of the stator cooling cavity 9121.

[0041] See also Figure 4 It can be understood that the inner shell 920 and the main shell 912 are both sleeve-shaped structures, so the stator cooling chamber 9121 that has not been sealed has two openings 9129 that are oppositely arranged along the axis of the rotor installation chamber 921. For the convenience of distinction, the two openings 9129 are defined as a first opening 9123 and a second opening 9124, wherein the first opening 9123 is arranged corresponding to the first cover body 911, and the second opening 9124 is arranged corresponding to the second cover body 913. Therefore, the sealing assembly 940 in this embodiment is correspondingly provided with two seals 943. For the convenience of distinction, the two seals 943 are defined as a first seal 941 and a second seal 942. The first seal 941 is used to seal the first opening 9123, and the second seal 942 is used to seal the second opening 9124. The embodiment of the present application does not specifically limit the way in which the seal 943 seals the opening 9129 and the structure of the seal 943. The seal 943 may be a groove-shaped structure, and the groove-shaped seal 943 covers the opening 9129 and covers the shell 910 and the inner shell 920 at the opening 9129. The seal 943 may also be a sealing plug-shaped structure, and the seal 943 is embedded in the opening 9129. Figure 3 or Figure 4 As shown, the present embodiment uses a sealing plug-shaped sealing member 943. Specifically, taking the first sealing member 941 and the first opening 9123 as an example, the first sealing member 941 is embedded in the first opening 9123, the first sealing member 941 is located between the main housing 912 and the inner housing 920, and the first sealing member 941 is sealedly connected to the main housing 912 and the inner housing 920 to seal the stator cooling cavity 9121.

[0042] See also Figure 8In order to increase the probability that the rotating drive member 900 can still work normally when encountering abnormal coolant supply, a redundant design is adopted for the stator cooling chamber 9121 in this embodiment. The stator cooling chamber 9121 in this embodiment includes at least two sub-cooling chambers 9125, and the two sub-cooling chambers 9125 are separated by a common partition 919. The two sub-cooling chambers 9125 are independently arranged, that is, the coolant in one sub-cooling chamber 9125 is not easy to flow into the other sub-cooling chamber 9125. The embodiment of the present application does not impose specific restrictions on the way in which the common partition 919 divides the stator cooling chamber 9121. The setting direction of the common partition 919 can be the same as the axial direction of the stator cooling chamber 1921, or it can intersect. The setting direction of the common partition 919 in the embodiment of the present application is consistent with the axial direction of the stator cooling cavity 1921, so that the two divided sub-cooling cavities 9125 are arranged side by side in the radial direction of the stator module 930, and the coolant mainly flows along the axial direction in the sub-cooling cavity 9125. Therefore, the possibility of flow and exchange between the two sub-cooling cavities 9125 along the radial direction is small, and the performance achieved by the redundant design is more stable.

[0043] It can be understood that in order to divide the stator cooling cavity 9121 into two sub-cooling cavities 9125, it is necessary to partition at two positions in the stator cooling cavity 9121. Therefore, the common partition 9190 in this embodiment includes at least two partition components 9191, and the two partition components 9191 are arranged in the stator cooling cavity 9121 at intervals along the axial direction of the stator cooling cavity 9121. The partition component 9191 is used to prevent the interaction of coolant on both sides of the partition component 9191 to achieve the partition of the stator cooling cavity 9121.

[0044] As can be seen from the above, a stator module 930 is provided in the stator cooling cavity 9121. Therefore, the partition component 9191 needs to cooperate with the stator module 930. The embodiment of the present application does not specifically limit the structure of the stator module 930, the structure of the partition component 9191, and the cooperation between the two. For example, the partition component 9191 can block the stator cooling cavity 9121 by avoiding the stator module 930, and the partition component 9191 can also cooperate with the stator module 930, and the two together block the stator cooling cavity 9121. In this embodiment, the partition component 9191 is selected to cooperate with the stator module 930 to achieve the isolation of the stator cooling cavity 9121.

[0045] First, the partitioning method of the stator module 930 is introduced. Specifically, the stator module 930 is provided with at least two sealing parts 939, and the two sealing parts 939 are arranged in the stator cooling cavity 9121 along the circumferential direction of the inner shell 920 at intervals. Each sealing part 939 is arranged in close contact with the inner shell 920 and the main shell 912 to complete the partial partition. It can be understood that in the axial direction of the inner shell 920, the sealing part 939 is located between the first sealing member 941 and the second sealing member 942. The sealing part 939 is arranged at intervals from the first sealing member 941, so that a first flow gap 9126 is defined between the sealing part 939 and the first sealing member 941. The sealing part 939 and the second sealing member 942 are also arranged at intervals, so that a second flow gap 9127 is defined between the sealing part 939 and the second sealing member 942. The first flow gap 9126 and the second flow gap 9127 defined by the sealing portion 939 and the first sealing member 941 and the second sealing member 942 are the unisolated portions.

[0046] Next, it is introduced that the first flow gap 9126 and the second flow gap 9127 are separated and sealed by the separation component 9191 in cooperation with the sealing part 939. Specifically, each separation component 9191 includes two separation members 9192. For the convenience of distinction and description, the two separation members 9192 are defined as a first separation member 9193 and a second separation member 9194. The first separation member 9123 is arranged on the first sealing member 941 and extends toward the stator module 930 to seal the first flow gap 9126. The second separation member is arranged on the second sealing member 942 and extends toward the stator module 930 to seal the second flow gap 9127. The first separation member 9193 and the second separation member 9194 cooperate with the stator module 930 to achieve the purpose of jointly separating the stator cooling cavity 9121.

[0047] It should be noted that the structure of the sealing portion 939 forming the stator module 930 can be the stator teeth 932, or the slot wedge 935, or a structure extending and protruding from the stator yoke 931, and the present embodiment of the application does not impose any specific restrictions on this. In this embodiment, the slot wedge 935 is selected as the sealing portion 939, please refer to Figure 7 and Figure 8. First, the stator yoke 931 is sealedly arranged around the inner shell 920, and then the slot wedge 935 is tightly fitted with the main shell 912 and the inner shell 920 to achieve preliminary sealing. Specifically, the slot wedge 935 has two opposite side portions. The two side portions are arranged along the radial direction of the stator yoke 931. Of the two side portions of the slot wedge 935, one side portion is tightly fitted with the main shell 912, and the other side portion is tightly fitted with the outer side surface of the stator yoke 931. This embodiment does not specifically limit the specific structure of the stator module 930. The stator teeth 932 can be arranged on the outer periphery of the stator yoke 931, or on the inner side of the stator yoke 931. When the stator teeth 932 are arranged on the inner side of the stator yoke 931, one of the two side portions is tightly fitted with the inner side surface of the stator yoke 931, and the other side portion is tightly fitted with the inner shell 920. In the axial direction of the inner shell 920, the slot wedge 935 is located between the first seal 941 and the second seal 942, and the slot wedge 935 is spaced apart from the first seal 941 and the second seal 942 so that the above-mentioned flow gap 9126 is formed on both opposite sides of the slot wedge 935 along the axial direction of the inner shell 920.

[0048] It should be noted that the two partition components in this embodiment can be matched with two slot wedges 935 at any position, two slot wedges 935 separated from each other, or two adjacent slot wedges 935, and this embodiment does not impose any specific restrictions on this. Figure 8 As shown, in this embodiment, two slot wedges 935 are selected and arranged at intervals along the radial direction of the inner shell 920. The two slot wedges 935 and two partition components divide the stator cooling cavity 9121 into two sub-cooling cavities 9125 of the same volume.

[0049] The stator cooling cavity 9121 is divided into two independent sub-cooling cavities 9121 by a partition assembly, so it is necessary to supply coolant to the two sub-cooling cavities 9121 separately. If the coolant supply passage corresponding to one of the sub-cooling cavities 9125 is abnormal, while the coolant supply passage corresponding to the other sub-cooling cavity 9125 is normal, the rotary drive member 900 can still operate normally, so as to achieve the purpose of the redundant design for the stator cooling cavity 912 in this embodiment.

[0050] First, the two sealed sub-cooling chambers 9125 need to be connected to the outside. Specifically, the sealing assembly 940 in this embodiment is provided with two conducting parts 9420, and the two conducting parts 9420 are arranged in a one-to-one correspondence with the two sub-cooling chambers 9125, and each conducting part 9420 is connected to a corresponding sub-cooling chamber 9125, so that the two sub-cooling chambers 9125 are connected to the outside. The embodiment of the present application does not specifically limit the position of the two conducting parts 9420. The two conducting parts 9420 can be arranged on the first sealing member 941, or on the second sealing member 942, or on the first sealing member 941 and the second sealing member 942, respectively.

[0051] See also Figure 4 , Fig. 9 and Fig.10 In this embodiment, two conducting parts 9420 are arranged on the second sealing member 942. The second sealing member 942 is arranged corresponding to the second cover 913, and the first liquid inlet channel 111 is also arranged corresponding to the second cover 913. The supply device in this embodiment can provide coolant to the stator cooling cavity 9121 and the cooling cavity 9122 at the same time through the pipeline assembly 915 on the second cover 913, which can simplify the structure of the housing 910. In addition, it should be noted in advance that this embodiment also performs redundant design on the rotor structure 500 and the cooling cavity 9122. This embodiment realizes redundant design by configuring at least two coolant supply passages for the first liquid inlet channel 111.

[0052] Specifically, the pipeline assembly 915 includes a stator cooling liquid inlet pipe 9152 and a rotor cooling liquid inlet pipe 9153. The stator cooling inlet pipe 9152 is connected to the sub-cooling cavity 9125 through a corresponding conductive portion 9420, and the rotor cooling inlet pipe 9153 is connected to the first liquid inlet channel 111. A one-way valve 9154 is provided on the rotor cooling inlet pipe 9153 to prevent the cooling cavity 9122 from actively sucking the cooling liquid in the supply device. The number of cooling liquid supply passages in the first liquid inlet channel 111 is the same as the number of sub-cooling cavities 9125. Therefore, in order to reduce the number of connecting pipes between the supply device and the second cover body 913, the stator cooling liquid inlet pipe 9152 and the rotor cooling liquid inlet pipe 9153 can be combined. In this embodiment, the pipeline assembly 915 also includes a main inlet pipe 9151, one end of which is connected to the supply device, and the other end is connected to the stator cooling liquid inlet pipe 9152 and the rotor cooling liquid inlet pipe 9153 at the same time.

[0053] The present embodiment does not impose any specific restrictions on the number of stator cooling liquid inlet pipes 9152 and the number of rotor cooling liquid inlet pipes 9153. The number of stator cooling liquid inlet pipes 9152 is set according to the number of sub-cooling chambers 9125. Similarly, the number of rotor cooling liquid inlet pipes 9153 is set according to the number of cooling liquid supply passages of the first liquid inlet channel 111. For example, in the present embodiment, the number of stator cooling liquid inlet pipes 9152 is set to at least two. The number of rotor cooling liquid inlet pipes 9153 is set to at least two, and the two rotor cooling inlet pipes 9153 form two rotor cooling input parts of the cooling chamber 9122. In addition, at least one rotor cooling output part (not shown in the figure) is also provided on the housing 910. The present embodiment does not impose any specific restrictions on the number of rotor cooling output parts, and one may be provided, or two or more may be provided to increase the cooling liquid outflow speed. The present embodiment does not impose any specific restrictions on the position of the rotor cooling output part, and it may be provided on the first cover 911. It may be provided on the second cover 913, or it may be provided on the main housing 912. In this embodiment, the rotor cooling output part is arranged on the second cover body 913. It can be inferred that the flow path of the coolant is: the coolant is discharged from the supply device, enters the first liquid inlet channel 111 through the rotor coolant input pipe 9153 on the second cover body 913, and then the coolant flows through the liquid guide cavity 11 to the first liquid outlet channel 112 at the first shaft portion 137, that is, the first cover body 911. Then the coolant is introduced into the cooling cavity 9122 from the first liquid outlet channel 112. When the coolant is introduced into the cooling cavity 9122, it is still at the first cover body 911, that is, the cooling cavity 9122 is farthest from the rotor coolant input pipe 9153. Finally, under the suction action of the recovery device, the coolant flows from the first cover body 911 to the second cover body 913, so that the flow path of the coolant in the cooling cavity 9122 is longer, which can improve the cooling effect of the coolant on the rotor structure 500.

[0054] It should be noted that, in this embodiment, the number of stator coolant inlet pipes 9152 is the same as the number of rotor coolant inlet pipes 9153, and one stator coolant inlet pipe 9152 and one rotor coolant inlet pipe 9153 may be combined or not.

[0055] In other embodiments, if the number of sub-cooling cavities 9125 is different from the number of coolant supply passages of the rotor structure 500, the multiple stator coolant inlet pipes 9152 and the multiple rotor coolant inlet pipes 9153 may all be provided separately, or may be partially combined.

[0056] This embodiment does not limit the specific form of the conductive portion 9420. It can be a through-hole structure or a slot structure. Fig. 9, the conducting part 9420 in this embodiment adopts a slot structure. In this embodiment, two conducting parts 9420 are arranged on the second sealing member 942, and the conducting part 9420 has a collecting groove 9421. Specifically, two collecting grooves 9421 are provided on one side of the second sealing member 942 facing the ion cooling cavity 9125, and the two collecting grooves 9421 correspond to two sub-cooling cavities 9125. A plurality of spray ports 9422 are arranged at intervals on the collecting groove 9421, and each collecting groove 9421 is connected to a corresponding sub-cooling cavity 9125 through a plurality of spray ports 9422. The plurality of spray ports 9422 allow the coolant to be sprayed at multiple positions, so that each part of the stator module 930 in the sub-cooling cavity 9125 can be taken into account.

[0057] See also Figure 4 , Fig. 9 and Fig.10 In order to make the stator coolant inlet pipe 9152 cooperate with the collecting groove 9421, the housing 910 of this embodiment further includes a sealing end cover 917, which is covered on the two collecting grooves 9421 and seals the two collecting grooves 9421. The sealing end cover 917 is provided with two flow holes 9171, and the two flow holes 9171 are arranged in a one-to-one correspondence with the two collecting grooves 9421, and the two flow holes 9171 are arranged in a one-to-one correspondence with the two stator coolant inlet pipes 9152. Each stator coolant inlet pipe 9152 is connected to a corresponding collecting groove 9421 through a corresponding flow hole 9171, and then connected to a corresponding sub-cooling cavity 9125. In this embodiment, the main inlet pipe 9151, the stator coolant pipeline 9152, the flow hole 9171, and the collecting groove 9421 are connected in sequence and together constitute the stator cooling input part 950. It can be deduced from the above that in this embodiment, there are two stator cooling input parts 950 , and the two stator cooling input parts 950 correspond to the two sub-cooling chambers 9125 .

[0058] Similarly, in response to the at least two sub-cooling chambers 9125 in this embodiment, the number of stator cooling output parts 960 is also at least two. The two stator cooling output parts 960 are arranged in a one-to-one correspondence with the two sub-cooling chambers 9125, and each stator cooling output part 960 is connected to a corresponding sub-cooling chamber 9125. Therefore, each sub-cooling chamber 9125 is configured with a stator cooling input part 950 and a stator cooling output part 960. The stator cooling input part 950 cooperates with the supply device, and the stator cooling output part 960 cooperates with the recovery device, so that each sub-cooling chamber 9125 has an independent coolant flow channel.

[0059] The present embodiment does not impose any specific restrictions on the relative positions of the stator cooling input portion 950 and the stator cooling output portion 960 of each sub-cooling cavity 9125. The stator cooling input portion 950 and the stator cooling output portion 960 corresponding to each sub-cooling cavity 9125 can be simultaneously arranged on the first cover body 911 and its vicinity, can be simultaneously arranged on the second cover body 913 and its vicinity, or can be respectively arranged on the first cover body 911 and its vicinity and the second cover body 913 and its vicinity. In the present embodiment, the stator cooling input portion 950 and the stator cooling output portion 960 corresponding to the sub-cooling cavity 9125 are respectively arranged on the first cover body 911 and its vicinity and the second cover body 913 and its vicinity, so as to extend the flow path of the coolant in the sub-cooling cavity, so that the coolant can be fully utilized, thereby improving the utilization rate of the coolant. Please refer to Fig.11 In this embodiment, the two stator cooling input parts 950 are arranged on the second cover body 913 , and therefore, the two stator cooling output parts 960 are arranged at a position of the main shell 912 close to the first cover body 911 .

[0060] In this embodiment, the stator cooling input part 950 and the stator cooling output part 960 are respectively arranged at the two ends of the stator cooling system 600, so that the coolant flows from one end of the stator cooling system 600 to the other end along the axis of the inner shell 920. In this embodiment, the relative position relationship between the stator cooling input part 950 and the stator cooling output part 960 in the vertical direction is not specifically limited. The stator cooling input part 950 can be arranged lower than the stator cooling output part 960, that is, the stator cooling system 600 supplies coolant from the bottom. Such an arrangement can ensure that the coolant fills the stator cooling cavity 9121, and the coolant can cool various parts of the stator module 930. The stator cooling input part 950 can also be arranged higher than the stator cooling output part 960, that is, the stator cooling system 600 supplies coolant from the top. Such an arrangement can reduce the spread of coolant with lower temperature, and the flow direction of coolant with lower temperature is more stable, which can improve the cooling efficiency of the stator module 930 by the coolant.

[0061] In other embodiments, the stator cooling system 600 may not separate the stator cooling cavity 9121, that is, the stator cooling system has only one cavity, namely, the stator cooling cavity 9121. In this embodiment, there may be only one flow channel for the coolant in the stator cooling cavity 9121, that is, there is only one stator cooling input part 950 and one stator cooling output part 960 in this embodiment. The flow channel of the coolant may also be designed redundantly, for example, two or more stator cooling input parts 950 are provided, or two or more stator cooling output parts 960 are provided. Such a setting enables the stator cooling system 600 to still flow the coolant even if only one stator cooling input part 950 and only one stator cooling output part 960 are able to be turned on, and the stator cooling system 600 can still work normally. The stator cooling system 600 in this embodiment is normally conductive when at least one stator cooling input part 950 and at least one stator cooling output part 960 are normally conductive and the coolant is normally conductive, so as to avoid the coolant being unable to be introduced into the stator cooling cavity 9121, causing the temperature of the stator module 930 to be too high, or the coolant being unable to be discharged from the stator cooling cavity 9121, causing the pressure in the stator cooling cavity 9121 to be too high, thereby causing damage to the stator cooling system structure.

[0062] See also Fig.12 The present application further provides a rotor structure 500. As described above, the rotor structure 500 is disposed in a cooling cavity 9122 defined by a housing 910. The rotor structure 500 in this embodiment may include a rotor 510 and a rotating shaft assembly 100.

[0063] First, the shaft assembly 100 is introduced. The shaft assembly 100 provided in this embodiment includes a shaft 10 and a flow limiting member 20. The shaft 10 is arranged in the cooling chamber 9122 and cooperates with the housing 910 so that the shaft 10 can be rotatably arranged on the housing 910. The liquid guide chamber 11 is arranged inside the shaft 10 to provide a space for the flow of the coolant. The liquid guide chamber 11 extends along the axial direction of the shaft 10, so that the first liquid inlet channel 111 and the first liquid outlet channel 112 are formed at both ends of the shaft 10, so that the coolant flow path formed by the liquid guide chamber 11 can pass through most of the structure of the shaft 10, thereby improving the cooling effect. The first liquid inlet channel 111 is connected to the rotor coolant input pipe 9153 to receive the coolant provided by the supply device. The first liquid outlet channel 112 is connected to the cooling chamber 9122 to guide the coolant in the liquid guide chamber 11 into the cooling chamber 9122. The cooling chamber 9122 is connected to an external recovery device to recover the coolant after heat exchange.

[0064] During the high-speed rotation of the rotor structure 500 of the conventional rotary drive member 900, a negative pressure condition will be formed in the cooling chamber 9122, and the negative pressure will cause the cooling chamber 9122 to draw substances from the outside to balance the negative pressure inside the cooling chamber 9122. The negative pressure formed in the cooling chamber 9122 is limited, and it is difficult to support the cooling chamber 9122 so that the coolant can flow back from the recovery device to the cooling chamber 9122 in a countercurrent manner. Therefore, the negative pressure in the cooling chamber 9122 will cause the coolant to flow into the cooling chamber from the liquid guide chamber 11 or the first outflow channel 112 in a downstream manner, forming active suction, thereby affecting the control and distribution of the coolant by the supply device. In an embodiment of the present application, a limit member 20 is provided on the rotating shaft 10, and the limit member 20 forms a pressure equalizing channel, and the pressure equalizing channel enables the first liquid outlet channel 112 and the liquid guide chamber 11 to communicate with the outside of the rotating shaft 10. Gas is easier to be sucked than liquid. Therefore, during the rotation of the shaft 10, the airflow is affected by the negative pressure in the cooling chamber 9122 before the coolant. The airflow enters the cooling chamber 9122 through the pressure equalizing channel and the first liquid outlet channel 112, which can balance the negative pressure in the cooling chamber 9122 and prevent the cooling chamber 9122 from extracting the coolant in the first liquid outlet channel 112 and the liquid guide chamber 11, thereby fully ensuring the control and distribution of the coolant by the supply device, so that the rotating drive component 900 can operate with sufficient cooling guarantee, thereby extending the service life of the rotating drive component 900.

[0065] See also Fig.13 In order to provide a space for accommodating air in the rotating shaft 10, the rotating shaft 10 in this embodiment may include a main shaft body 13 and an internal tube body 14. The main shaft body 13 has an inner cavity, and the internal tube body 14 is coaxially arranged in the inner cavity of the main shaft body 13 and is spaced apart from the inner wall of the main shaft body 13. A first cavity 131 is defined between the internal tube body 14 and the inner wall of the main shaft body 13. The flow limiting member 20 is arranged in the first cavity 131. The internal tube body 14 is provided with a second cavity 141, and the first cavity 131 is connected with the second cavity 141 to form a liquid guide cavity 11. The first cavity 131 is connected with the cooling channel 5111 to allow the coolant to flow. Specifically, the coolant first enters the second cavity 141 of the internal tube body 14, and then enters the first cavity 131. The coolant is subjected to the centrifugal force in the first cavity 131 and adheres to the inner wall of the main shaft body 13 to form a space for accommodating air in the first cavity 131.

[0066] In order to connect the first cavity 131 with the outside so that the airflow can enter the cooling cavity 9122 under the action of negative pressure, the pressure equalizing channel connects the first cavity 131 with the outside of the rotating shaft 10. The present embodiment does not specifically limit the environment outside the rotating shaft 10, which can be the outside of the entire rotating drive member 900 or the cooling cavity 9122 where the rotating shaft 10 is located. In the present embodiment, the pressure equalizing channel connects the first cavity 131 with the cooling cavity 911. When there is negative pressure in the cooling cavity 9122 and a substance needs to be sucked from the outside, the airflow in the first cavity 131 can enter the cooling cavity 9122, preventing the coolant from being sucked into the cooling cavity 9122.

[0067] See also Fig.13 In order to ensure that the first cavity 131 has enough space to accommodate enough air whether the rotary drive member 900 is arranged vertically, inclined or horizontally, in this embodiment, the flow limiting member 20 is used to concentrate the coolant at one end of the first cavity 131 close to the first liquid outlet channel 112 to prevent the coolant from occupying most of the space of the first cavity 131. Specifically, the flow limiting member 20 in this embodiment includes an annular baffle 21, which is arranged in the first cavity 131, and the annular baffle 21 is connected to the inner cavity side wall of the spindle body 13, and the first cavity 131 is divided into a first sub-cavity 1312 and a second sub-cavity 1311. The annular baffle 21 is arranged around the outer periphery of the internal tube body 14, and the annular baffle 21 is spaced from the internal tube body 14, and an airflow gap 22 is formed between the annular baffle 21 and the internal tube body 12, so that the first sub-cavity 1312 and the second sub-cavity 1311 are connected. Among them, the airflow gap 22 is a component of the pressure equalization channel. In addition, in this embodiment, a pressure equalizing hole 133 is provided on the main shaft body 13, and the second sub-cavity 1311 is connected to the outside of the rotating shaft 10 through the pressure equalizing hole 133. The pressure equalizing hole 133, the second sub-cavity 1311 and the airflow gap 22 are connected in sequence to form a pressure equalizing channel together. When the rotor structure 500 rotates at a high speed, the annular baffle 21 can make the coolant accumulate in the first sub-cavity 1312, preventing the coolant from extending on the inner wall of the main shaft body 13 in the direction toward the first liquid inlet channel 111, that is, blocking the coolant from flowing into the second sub-cavity 1311.

[0068] In order to further prevent the coolant from entering the first sub-cavity 1312 from the second sub-cavity 1311, the annular baffle 21 in this embodiment includes an annular portion 211 and a channel portion 212. The channel portion 212 is arranged at intervals around the outer periphery of the inner tube body 14. The channel portion 212 and the inner tube body 14 define an airflow gap 22. The annular portion 211 is connected to an end of the channel portion 212 away from the first shaft portion 137, and 211 protrudes radially relative to the channel portion 212, and is generally flat and annular. The annular portion 211 has an outer ring side and an inner ring side. The outer ring side of the annular portion 211 is connected to the inner cavity side wall of the spindle body 13, and the inner ring side of the annular portion 211 is connected to the arc of the channel portion 212. Therefore, the airflow enters the first sub-cavity 1312 through the pressure equalizing hole 133, and then enters the second sub-cavity 1311 through the airflow gap 22. When passing through the airflow gap 22, even if the flow rate is high, the noise generated is relatively low. The channel portion 212 protrudes relative to the annular portion 211 along the axial direction of the spindle body 13, so that the channel portion 212, the annular portion 211 and the inner cavity side wall of the spindle body 13 together define a liquid storage tank 213. Most of the coolant can be confined in the liquid storage tank 213 under the action of centrifugal force to wait to be introduced into the cooling cavity 9122, and it is not easy to enter the first sub-cavity 1312 through the air flow gap 22.

[0069] It should be noted that the embodiment of the present application does not specifically limit the structure of the flow limiting member 20. In addition to the annular baffle 21 described above, other components may be selected to realize the function of the flow limiting member 20. For example, the first sub-cavity 1312 and the second sub-cavity 1311 are sealed by an annular sealing plate, and a valve body is provided on the annular sealing plate. The valve body prevents the coolant in the first sub-cavity 1312 from entering the second sub-cavity 1311, but the gas in the second sub-cavity 1311 can enter the first sub-cavity 1312.

[0070] See also Fig.13 In order to make the first cavity 131 and the second cavity 141 communicate with each other, a first liquid outlet hole 142 is provided on the inner tube body 14, and the first cavity 131, that is, the first sub-cavity 1312 communicates with the second cavity 141 through the first liquid outlet hole 142. In order to make the first sub-cavity 1312 communicate with the outside of the rotating shaft 10, a second liquid outlet hole 132 is provided on the main shaft body 13, and the first sub-cavity 1312 communicates with the outside of the rotating shaft 10 through the second liquid outlet hole 132. Among them, the first liquid outlet hole 142, the first sub-cavity 1312 and the second liquid outlet hole 132 are connected in sequence and together constitute the first liquid outlet channel 112.

[0071] See also Fig.13During the high-speed rotation of the rotor structure 500, the coolant in the first cavity 131 and the second cavity 141 has centrifugal force, and the coolant has a tendency to move toward the outer ring. Therefore. In order to be able to cooperate with the movement trend of the coolant and improve the smoothness of the coolant flow, in this embodiment, the first liquid outlet 142 is arranged on the side wall of the internal tube body 14, so that the coolant in the second cavity 141 can be introduced into the first cavity 131 through the first liquid outlet 142 under the action of centrifugal force. Similarly, the second liquid outlet 132 is arranged on the side wall of the spindle body 13, and the coolant in the first cavity 131 can be introduced into the cooling cavity 9122 through the second liquid outlet 132 under the action of centrifugal force.

[0072] In this embodiment, by setting a flow limiting member 20 in the first cavity 131, the flow path of the coolant is effectively limited, so that most of the coolant flows into the cooling cavity 9122. When the rotary drive member 900 is working, the shaft assembly 100 rotates at high speed, and the coolant in the first sub-cavity 1312 overcomes gravity and is limited on the inner wall of the first sub-cavity 1312 under the action of centrifugal force to wait to be introduced into the cooling cavity 9122. It is not easy to enter the first sub-cavity 1312 through the air flow gap 22. Therefore, the posture of the stator cooling system 600 and the rotary drive member 900 in this embodiment during operation can be unrestricted. The rotary drive member 900 can be set upright in the application environment, that is, the shaft assembly 100 is set approximately vertically. The rotary drive member 900 can also be set horizontally in the application environment, that is, the shaft assembly 100 is set approximately horizontally.

[0073] In this embodiment, the main shaft body 13 has a first shaft portion 137, a main shaft portion 136, and a second shaft portion 138 that are sequentially connected along the axial direction thereof. The inner cavity is provided in the main shaft portion 136, and the inner cavity passes through the two opposite ends of the main shaft portion 136. The first shaft portion 137 and the second shaft portion 138 respectively close the two ends of the main shaft portion. In this embodiment, the main shaft body 13 is provided with a third liquid outlet 134 at a position close to the first shaft portion 137, and the third liquid outlet 134 is connected to the first sub-cavity 1312, and the third liquid outlet 134 points to the first bearing 914, so that the first bearing 914 can be cooled after the coolant enters the cooling cavity 9122.

[0074] Next, the rotor is introduced. The rotor 510 is connected to the rotating shaft 10. The rotor 510 includes a rotor core 511 and a plurality of magnets 512. The rotor core 511 is arranged around the outer periphery of the rotating shaft 10, and the plurality of magnets 512 are arranged around the outer periphery of the rotor core 511 at intervals. The rotor structure 500 cooperates with the stator structure 700 described above to generate a driving force to rotate the rotor structure 500. In this embodiment, a cooling channel 5111 is provided on the rotor core 511. The cooling channel 5111 penetrates the rotor core 511 along the axial direction of the rotating shaft 10, so that the cooling channel 5111 can be connected to the cooling cavity 9122, thereby cooling the interior of the rotor core 5111 to improve the cooling effect. The rotor 510 is arranged in the cooling cavity 9122. The coolant in the cooling cavity 9122 can exchange heat and cool the surface of the rotor 510. The setting of the cooling channel 5111 can overcome the problem of the large thickness of the rotor core 511, so that the coolant can also cool the inside of the rotor core 511 and the rotating shaft 10 in time.

[0075] See also Fig.12 In order to allow the coolant to be directly introduced into the cooling channel 5111, the rotor structure 500 in this embodiment further includes a first conductive member 540, which is disposed between the rotor core 511 and the first liquid outlet channel 112. It can be understood that the first conductive member 540 is disposed between the cooling channel 5111 and the first liquid outlet channel 112. A first conductive groove 541 is provided on the first conductive member 540, and the first liquid outlet channel 112 is connected to the cooling channel 5111 through the first conductive groove 541, so that the coolant can directly enter the cooling channel 5111 from the inside of the rotating shaft 10. In this embodiment, the method and structure of connecting the first liquid outlet channel 112 and the cooling channel 5111 are not limited, and a connecting pipe or a liquid accumulation tank that plays a transition and transfer role can be used.

[0076] In this embodiment, in order to allow the coolant to cool the second bearing 915 after being introduced into the cooling cavity 9122, in this embodiment, the rotor structure 500 may further include a second conductive member 550, which is disposed between the rotor core 511 and the second shaft portion 138, and a guide hole 551 is provided on the second conductive member 550, the guide hole 551 passes through the second conductive member 550, and forms a first hole end 5511 and a second hole end 5512, wherein the first hole end 5511 is communicated with the cooling channel 5111, and the second hole end 5512 is communicated with the cooling cavity 9122. The guide hole 551 is inclined relative to the axis of the main shaft body 13. Specifically, the first hole end 5511 is closer to the axis of the main shaft body 13 relative to the second hole end 5512, so that the second hole end 5512 points to the second bearing 915. After the guide hole 551 allows the coolant to enter the cooling cavity 9122, it first flows to the second bearing 915 and cools the second bearing 915, and then flows in a direction away from the spindle body 13. When the coolant is oil, it can also lubricate the first bearing 914 and the second bearing 915.

[0077] The rotating shaft assembly 100 in the embodiment of the present application includes a main shaft body 13 and an internal pipe 14. A first cavity 131 is formed between the main shaft body 13 and the internal pipe 14, and a second cavity 141 is formed in the internal pipe 14. The first cavity 131 is connected to the second cavity 141 to realize the conduction of the coolant. Among them, the first cavity 131 is connected to the cooling channel 5111. In order to prevent the cooling channel 5111 in a negative pressure state from actively sucking coolant into the first cavity 131, an annular baffle 21 is provided in the first cavity 131 so that there is more air in the first cavity 131. A pressure equalization channel is also formed in the first cavity 131. When the cooling channel 5111 sucks material into the first cavity 131 under the action of negative pressure, the air in the first cavity 131 can be sucked into the cooling channel 5111. The coolant in the cooling cavity 9122 can be the coolant actively input by the supply device, so that the supply device can control the coolant and reasonably distribute the coolant.

[0078] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0079] In the description of the present application, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", and "inside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely simplified descriptions for the convenience of describing the present application. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0080] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A stator cooling system, characterized in that: The stator cooling system is used to install the stator module, and the stator module is used to drive the rotor structure to rotate. The stator cooling system includes: A housing assembly, the housing assembly comprising a housing and an inner housing, the inner housing circumferentially defining a rotor mounting cavity for mounting the rotor structure, the inner housing coaxially penetrating the housing, the housing and the inner housing spaced apart to jointly define a stator cooling cavity for mounting the stator module, the stator cooling system being provided with a stator cooling input portion and a stator cooling output portion, the stator cooling input portion and the stator cooling output portion both being connected to the stator cooling cavity; and, A sealing assembly is arranged between the shell and the inner shell, and is used for sealing the stator cooling cavity and isolating the stator cooling cavity from the rotor installation cavity.

2. The stator cooling system according to claim 1, characterized in that: The stator cooling cavity comprises at least two sub-cooling cavities, two adjacent sub-cooling cavities are separated by a common partition so as to be independently arranged from each other, a part of the stator module is located in one of the sub-cooling cavities, and another part of the stator module is located in another sub-cooling cavity; At least two stator cooling input parts are provided, and the two stator cooling input parts are provided in one-to-one correspondence with the two sub-cooling chambers, and each stator cooling input part is communicated with a corresponding sub-cooling chamber; At least two stator cooling output parts are provided, and the two stator cooling output parts are provided in one-to-one correspondence with the two sub-cooling chambers, and each stator cooling output part is communicated with a corresponding sub-cooling chamber.

3. The stator cooling system according to claim 2, characterized in that: At least two conducting parts are provided on the sealing assembly, the two conducting parts are arranged in one-to-one correspondence with the two sub-cooling chambers, the two conducting parts are arranged in one-to-one correspondence with the two stator cooling input parts, and each stator cooling input part is connected to a corresponding sub-cooling chamber through the conducting part.

4. The stator cooling system according to claim 3, characterized in that: The sealing assembly includes two sealing members; In the axial direction of the rotor mounting cavity, the stator cooling cavity has two opposite openings; the two seals are arranged in one-to-one correspondence with the two openings; each seal is arranged between the shell and the inner shell, and the seal is sealed and connected to the shell and the inner shell to close a corresponding opening.

5. The stator cooling system according to claim 4, characterized in that: The two conducting parts are both arranged on one of the sealing members; and / or the two conducting parts are respectively arranged on two sealing members.

6. The stator cooling system according to claim 5, characterized in that: The conducting portion has a collecting groove, which is arranged on a side of the sealing member away from the stator cooling cavity, and the collecting groove is connected to a corresponding sub-cooling cavity.

7. The stator cooling system according to claim 6, characterized in that: A plurality of spray ports are arranged at intervals in the collecting tank, and each of the spray ports is connected to a corresponding sub-cooling cavity.

8. The stator cooling system according to claim 5, characterized in that: The housing has two ends along the axial direction; Each of the sub-cooling cavities corresponds to a stator cooling input portion and a stator cooling output portion, and the stator cooling input portion and the stator cooling output portion corresponding to each of the sub-cooling cavities are respectively arranged at two ends of the shell.

9. The stator cooling system according to claim 2, characterized in that: The shell further comprises a common partition, which is arranged in the stator cooling cavity along the axial direction of the stator cooling cavity so as to divide the stator cooling cavity into two sub-cooling cavities which are arranged in parallel in the radial direction of the stator module.

10. The stator cooling system according to claim 7, characterized in that: The common partition includes two partition components, and the two partition components are arranged in the stator cooling cavity at intervals along the axial direction of the stator cooling cavity to prevent the interaction of coolant on both sides of the partition components.

11. The stator cooling system according to claim 10, characterized in that: The two seals include a first seal and a second seal, the stator module is suitable for being arranged between the first seal and the second seal, and the partition assembly includes a first partition and a second partition; the first partition is connected to the first seal, and the second partition is connected to the second seal, and the first partition and the second partition both extend toward the stator module to form a structure together with the stator module to hinder the interaction of coolant on both sides of the partition assembly.

12. A stator structure, characterized in that: A stator module comprising a stator module and a stator cooling system according to any one of claims 1 to 11; The stator module is arranged in the stator cooling cavity.

13. The stator structure according to claim 12, characterized in that: The stator module comprises a stator yoke, a plurality of stator teeth and a plurality of slot wedges; The stator yoke is arranged on the outer periphery of the inner shell, and a plurality of stator teeth are arranged in sequence and spaced apart on the outer periphery of the stator yoke. A winding slot is defined between two adjacent stator teeth, and each slot wedge is embedded in a corresponding winding slot.

14. The stator structure according to claim 10, characterized in that: The slot wedge includes a main body and a protruding portion. The main body extends along the axial direction of the stator module and is arranged in the winding slot and is spaced relative to the winding in the winding slot; the protruding portion is arranged on a side of the main body facing the winding and protrudes relative to the main body.

15. The stator structure according to claim 14, characterized in that: The protrusion is extended along the axial direction of the stator module; the surface of the main body facing the winding includes a first guide surface and a second guide surface extending along the axial direction of the stator module, and the protrusion is arranged between the first guide surface and the second guide surface.

16. The stator structure according to claim 15, characterized in that: The first flow guide surface is closer to the stator yoke than the second flow guide surface, and in the radial direction, a size of the first flow guide surface is smaller than a size of the second flow guide surface.

17. The stator structure according to claim 15, characterized in that: The distance between the winding and the first flow guiding surface is greater than the distance between the winding and the protrusion, or the distance between the winding and the second flow guiding surface is greater than the distance between the winding and the protrusion.

18. The stator structure according to claim 14, characterized in that: The stator module also includes multiple windings; the windings include multiple coils, the multiple coils in one winding are wound around a corresponding stator tooth, and the multiple coils on one stator tooth are arranged in sequence along the radial direction of the stator module; among the multiple coils on one stator tooth, there is a first coil group directly opposite to the first guide surface and a second coil group directly opposite to the second guide surface, the first guide surface is closer to the stator yoke than the second guide surface, and the number of coils in the first coil group is less than the number of coils in the second coil group.

19. A rotary drive member, characterized in that: include: The stator structure according to any one of claims 12 to 18; as well as, The rotor structure is installed on the shell, the rotor structure is arranged through the inner shell, and the rotor structure is rotationally matched with the stator structure.

20. A transport device, characterized in that: It comprises a machine body and the rotary driving member according to claim 19, wherein the rotary driving member is installed in the machine body.

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