Generator and aviation power system

Abstract

The invention relates to the technical field of generators, and discloses a generator and an aviation power system, and the generator comprises a stator unit which comprises a bearing assembly and a stator assembly, the outer wall of the bearing assembly is provided with a first liquid inlet hole and a first liquid outlet hole which are communicated with a containing cavity, and the stator assembly is arranged in the containing cavity; the rotor unit comprises a rotating shaft assembly and a rotor assembly, a heat exchange surface is formed on the inner wall of the rotating shaft assembly, at least one second liquid inlet hole is formed in the heat exchange surface, and the rotor assembly is provided with a heat dissipation channel; a bearing assembly; when cooling liquid is continuously sprayed to the heat exchange face of the rotating shaft assembly in the rotating state through the conveying pipe, the cooling liquid moves in the circumferential direction and the axial direction along the heat exchange face to continuously exchange heat with the rotating shaft assembly; and then the liquid enters the heat dissipation channel through the second liquid inlet hole to exchange heat with the interior of the rotor assembly, so that the heat dissipation efficiency of the rotor unit is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and in particular to generators and aviation power systems. Background Art

[0002] Generators are an important part of the power system of aviation equipment. Taking aircraft as an example, generators are the main supplier of electrical energy required by electrical equipment on aircraft. Generators are not only the core component of aircraft electrical systems, but also play an irreplaceable role in ensuring flight safety and improving flight quality. Therefore, for aviation equipment, it is very important for generators to work stably and reliably.

[0003] At present, in order to solve the heating problem of generators, the industry generally adopts cooling methods such as stator water cooling, labyrinth stator cooling, and terminal winding spraying to cool the generators. Generators with lower power can basically meet the heat dissipation requirements by using the above cooling methods. However, in high-power aviation power systems, since the power of the generators is relatively high, high-power generators using the above cooling methods will still overheat, resulting in the generators being unable to work stably and reliably. Therefore, the existing cooling methods of generators have the problem of being unable to meet the heat dissipation requirements of high-power generators. Summary of the invention

[0004] In view of this, the present invention provides a method for solving the problem that the existing cooling method of the generator is difficult to meet the heat dissipation requirements of the high-power generator.

[0005] In a first aspect, the present invention provides a generator, comprising: a stator unit, comprising a bearing assembly and a stator assembly, the bearing assembly is arranged in an annular shape and has a first accommodating cavity inside, a first liquid inlet hole and a first liquid outlet hole connected to the accommodating cavity are arranged on the outer wall of the bearing assembly, the inner ring of the bearing assembly forms a working space along the radially inward space, the stator assembly is arranged in the accommodating cavity, the stator assembly has a cooling channel connected to the first accommodating cavity, and the first liquid inlet hole and the first liquid outlet hole are suitable for connecting to an external cooling liquid source; a rotor unit, rotatably arranged in the working space, the rotor unit comprises a shaft assembly and a rotor assembly The rotor assembly is sleeved on the outer side of the shaft assembly, the inner wall of the shaft assembly forms a heat exchange surface, at least one second liquid inlet hole is arranged on the heat exchange surface, the rotor assembly has a heat dissipation channel whose liquid inlet is connected to the second liquid inlet hole, and the end of the rotor assembly along the axial direction is provided with a liquid outlet connected to the heat dissipation channel; the bearing assembly is located between the shaft assembly and the bearing assembly, and the bearing assembly has a second liquid outlet connected to the liquid outlet of the heat dissipation channel; the delivery pipe is axially inserted into the interior of the shaft assembly and is used to deliver coolant, the outer wall of the delivery pipe is provided with a first liquid infusion hole, and the first liquid infusion hole and the second liquid inlet hole are staggered along the axial direction.

[0006] Beneficial effect: the first liquid infusion hole and the second liquid inlet hole are staggered, and when the coolant is continuously sprayed onto the heat exchange surface of the rotating shaft assembly in a rotating state through the delivery pipe, the coolant will move circumferentially and axially along the heat exchange surface under the action of centrifugal force and continuous supply, and continuously exchange heat with the rotating shaft assembly, and then enter the heat dissipation channel through the second liquid inlet hole to exchange heat with the rotor assembly inside, and finally flow out through the second liquid outlet hole, so that the coolant can not only dissipate heat for the rotor assembly but also dissipate heat for the same rotating shaft assembly, thereby greatly improving the heat dissipation efficiency of the rotor unit. In addition, the coolant is introduced into the first accommodating cavity through the first liquid inlet hole, and the coolant flows out from the first liquid outlet hole via the cooling channel. By adopting a cooling method in which the stator assembly is immersed in the coolant, the contact area between the stator assembly and the coolant is increased, so that the coolant can continuously and stably exchange heat with the stator assembly during the operation of the generator to ensure the heat dissipation effect, thereby effectively solving the problem that the cooling method of the existing generator is difficult to meet the heat dissipation requirements of high-power generators.

[0007] In an optional embodiment, the shaft assembly includes a main body, which includes a first connecting section, a heat exchange section and a second connecting section connected in sequence along the axial direction. The rotor assembly is sleeved on the heat exchange section. The inner diameter of the heat exchange section is larger than the first connecting section and the second connecting section. The second liquid inlet is located on the inner wall of the heat exchange section.

[0008] Beneficial effect: In this form of the main body, the inner walls of the first connecting section, the heat exchange section and the second connecting section can form an annular groove body. Under the action of centrifugal force, the lubricating oil delivered by the first infusion hole in the delivery pipe can be restricted in the groove body, so that the lubricating oil can only enter the second liquid inlet hole after heat exchange with the inner wall of the heat exchange section, which can effectively prevent the lubricating oil from moving freely inside the main body.

[0009] In an optional embodiment, the heat exchange section forms a guiding surface with the connecting surfaces on the inner sides of the first connecting section and the second connecting section respectively, and the inner diameter of the guiding surface gradually increases in the direction approaching the heat exchange section. The second liquid inlet hole is located on the inner wall of the heat exchange section near one end of the first connecting section, and the first liquid inlet hole of the delivery pipe is arranged corresponding to the guiding surface near the second connecting section.

[0010] Beneficial effect: With this type of guide surface, when the coolant output from the first infusion hole reaches the guide surface close to the second connecting section, under the action of centrifugal force, the coolant will move faster along the guide surface toward the heat exchange section and the guide surface close to the first connecting section, thereby increasing the flow rate of the coolant.

[0011] In an optional embodiment, the coolant in the delivery pipe is lubricating oil, the bearing assembly includes a connecting bearing and a bearing seat, the first connecting section and the second connecting section are respectively provided with bearing assemblies, the first connecting section and the second connecting section are respectively connected to the inner ring of the corresponding connecting bearing, the outer ring of the connecting bearing is assembled and connected to the load-bearing assembly through the bearing seat, the inner walls of the first connecting section and the second connecting section are respectively provided with lubrication grooves, the lubrication grooves are provided with lubrication holes connected to the connecting bearing, and the outer wall of the delivery pipe is provided with a second infusion hole at the position corresponding to the lubrication groove.

[0012] Beneficial effect: By providing this type of lubrication groove and lubrication hole, the lubricating oil can not only cool the shaft assembly and the rotor assembly, but also be used to lubricate the connecting bearings. The delivery process of the cooling and lubricating lubricating oil can be completed simultaneously through a single delivery pipe.

[0013] In an optional embodiment, the bearing assembly also includes a sealing ring connected to the side of the bearing seat close to the rotor assembly, the sealing ring respectively abuts against one end of the rotor assembly and the inner ring wall of the bearing assembly, the bearing assembly, the two sealing rings and the rotor assembly together form a sealed cavity, the sealing ring, the bearing seat, the connecting bearing, the main body and the rotor assembly together form a first liquid discharge cavity, the second liquid outlet hole is located in the bearing seat, and the liquid outlet of the heat dissipation channel is connected to the second liquid outlet hole through the first liquid discharge cavity.

[0014] Beneficial effect: By setting a sealing ring, the coolant can be prevented from flowing into the sealing cavity, and the friction between the coolant and the bearing assembly when the rotor assembly rotates can be prevented, which can prevent the coolant from being stirred, thereby ensuring that the rotor assembly can work normally and reliably.

[0015] In an optional embodiment, one end of the main body where the second connecting section is located is closed, and one end of the main body where the first connecting section is located is provided with an opening, and the delivery pipe extends into the interior of the main body through the opening; the generator also includes a first cover plate and a second cover plate, the first cover plate is located on a side of the first connecting section away from the second connecting section and is sleeved on the delivery pipe, the periphery of the first cover plate is assembled and connected to the bearing component, and the first cover plate is provided with a first discharge outlet on the second liquid outlet on the side where the first cover plate is located; the second cover plate is sleeved on the second connecting section and is located on a side of the bearing assembly away from the rotor assembly, the periphery of the second cover plate is assembled and connected to the bearing component, and the second cover plate is provided with a second discharge outlet on the second liquid outlet on the side where the second cover plate is located.

[0016] Beneficial effect: By arranging the first cover plate and the second cover plate to seal the outer side of the bearing assembly, the lubricating oil entering the connecting bearing is prevented from directly flowing out of the generator from the connecting bearing. The lubricating oil at the connecting bearing can be combined and then discharged from a unified second discharge port, thereby improving the reliability and safety of the lubricating oil discharge.

[0017] In an optional embodiment, the rotating shaft assembly also includes a comb ring sleeved on the second connecting section, the second cover plate is abutted against the outer wall of the second connecting section through the comb ring, the comb ring is matched with the second connecting section through the first comb structure on its outer circumferential surface, the first comb structure is sealed against the second connecting section and forms a sealed cavity; a first air supply channel and an air inlet for connecting to an external air source are provided inside the second cover plate, the inlet of the first air supply channel is connected to the air inlet, and the outlet of the first air supply channel is connected to the sealed cavity.

[0018] Beneficial effect: The airflow is introduced into the sealing cavity through the air inlet and the first air delivery channel. The air curtain formed by the airflow cooperates with the first comb tooth structure, which can effectively ensure the sealing between the second cover plate and the second connecting section to prevent the coolant from leaking from here, and can also prevent the airflow from flowing out of the sealing cavity in large quantities, thereby ensuring the reliability of the air curtain seal.

[0019] In an optional embodiment, the sealing ring is sealed with one end of the rotor assembly through a second comb tooth structure; the bearing assembly also has a second air supply channel, the inlet of the second air supply channel is connected to the air inlet, and the outlet of the second air supply channel is connected to the sealing chamber.

[0020] Beneficial effect: The airflow is introduced into the sealing chamber through the second air supply channel and fills the sealing chamber. The airflow can form a more reliable sealing form at the second comb tooth structure of the two sealing rings respectively. The comb tooth structure and the air curtain work together to prevent the lubricating oil in the first liquid discharge chamber from entering the sealing chamber, so that the sealing chamber remains dry, ensuring that the rotor assembly has lower friction resistance when rotating.

[0021] In an optional embodiment, the stator assembly includes a stator core and a winding arranged on the stator core, the cooling channel includes a first cooling section, a second cooling section and a third cooling section extending along the axial direction, the first cooling section is formed inside the stator core, the gap between the winding and the stator core forms the second cooling section, and the gap between the stator core and the inner ring of the bearing assembly forms the third cooling section, and / or the rotor assembly includes a protective cover, a rotor core and a permanent magnet, the protective cover and the heat exchange section together form an installation space, the rotor core and the permanent magnet are arranged in the installation space in sequence from the outside to the inside along the radial direction, each heat dissipation channel includes an alternating first heat dissipation section and a second heat dissipation section, the first heat dissipation section and the second heat dissipation section are both located inside the rotor core and are connected end to end in sequence, the first heat dissipation section extends radially of the rotor core, the second heat dissipation section extends axially of the rotor core, the liquid inlet of the heat dissipation channel is located on the inner wall of the rotor core, and the liquid outlet of the heat dissipation channel is located on the protective cover.

[0022] Beneficial effects: The cooling channels are arranged in multiple sections along the radial direction. The coolant enters the first accommodating cavity from the first liquid inlet hole and flows through the stator assembly in multiple paths, which can further increase the contact area between the coolant and the stator assembly. Not only is the cooling effect better, but it can also prevent the heat of the stator assembly from being radiated from the inner ring of the load-bearing assembly to the rotor assembly. The heat dissipation channel has a simple structure and is easy to process and manufacture. The second heat dissipation section allows the coolant to fully contact the rotor core to ensure the cooling effect.

[0023] In a second aspect, the present invention also provides an aviation power system, which includes: the above-mentioned generator; a first coolant delivery device, which is respectively connected to the first liquid inlet and the first liquid outlet of the stator unit of the generator; and a second coolant delivery device, which is respectively connected to the delivery pipe of the generator and the second liquid outlet of the bearing assembly of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a cross-sectional schematic diagram of a generator according to an embodiment of the present invention, showing only the cooling method of the rotor unit;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view showing the cooling method of the stator unit in the generator shown;

[0027] Figure 3 for Figure 1 The generator shown is a cutaway schematic diagram showing only the airflow sealing structure;

[0028] Figure 4 for Figure 3 An enlarged schematic diagram of the left end of the generator shown;

[0029] Figure 5 for Figure 3 An enlarged schematic diagram of the right end of the generator shown;

[0030] Figure 6 for Figure 1 The generator shown is a schematic diagram of the connection status of various cavities when the coolant flow channel and the sealing gas path are not shown.

[0031] Description of reference numerals:

[0032] 1. Carrying assembly; 101. First accommodating cavity; 102. End cover; 1021. Second gas transmission channel; 103. Casing; 1031. First liquid inlet hole; 1032. First liquid outlet hole; 104. Sealing ring;

[0033] 2. stator assembly; 201. cooling channel; 2011. first cooling section; 2012. second cooling section; 2013. third cooling section; 202. stator core; 203. winding;

[0034] 3. Rotating shaft assembly; 301. Main body; 3011. First connecting section; 3012. Heat exchange section; 30121. Second liquid inlet hole; 3013. Second connecting section; 3014. Guide surface; 3015. Lubrication groove; 3016. Lubrication hole; 302. Grate ring; 3021. Sealing cavity; 303. Power flange;

[0035] 4. rotor assembly; 401. heat dissipation channel; 402. rotor core; 403. permanent magnet; 404. retaining ring; 405. sheath; 406. locking nut; 407. second comb tooth structure;

[0036] 5. Bearing assembly; 501. Connecting bearing; 502. Bearing seat; 5021. Second liquid outlet; 503. Sealing ring;

[0037] 6. Delivery tube; 601. First infusion hole; 602. Second infusion hole;

[0038] 701, sealed chamber; 702, first liquid discharge chamber; 703, second liquid discharge chamber;

[0039] 8. first cover plate; 801. first discharge outlet;

[0040] 9. Second cover plate; 901. Second exhaust port; 902. First gas transmission channel; 903. Gas inlet. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] Combine the following Figures 1 to 5 , describing an embodiment of the present invention.

[0043] In the relevant technology, in the current field of generators, since most of them are ground equipment with relatively small power (about hundreds of kilowatts), the problem of heat generation during the working process of the generator is not particularly prominent. However, the high-power generators used in aviation have very large power (such as 1MW level and above), which leads to a very prominent problem of motor heating. Excessive temperature will cause the rotor to lose magnetism, the generator cannot generate enough electrical power, and the motor cannot operate normally for a long time.

[0044] According to an embodiment of the present invention, on the one hand, a generator is provided, including: a stator unit, a rotor unit, a bearing assembly 5 and a delivery pipe 6, the stator unit includes a bearing assembly 1 and a stator assembly 2, the bearing assembly 1 is arranged in an annular shape and has a first accommodating cavity 101 inside, the outer wall of the bearing assembly 1 is provided with a first liquid inlet hole 1031 and a first liquid outlet hole 1032 connected to the accommodating cavity, the inner ring of the bearing assembly 1 forms a working space along the radially inward space, the stator assembly 2 is arranged in the accommodating cavity, the stator assembly 2 has a cooling channel 201 connected to the first accommodating cavity 101, the first liquid inlet hole 1031 and the first liquid outlet hole 1032 are suitable for communicating with an external cooling liquid source, the rotor unit is rotatably arranged in the working space, and the rotor unit includes a shaft assembly 3 and a rotor assembly 4, the rotor assembly 4 is sleeved on the outer side of the shaft assembly 3, the inner wall of the shaft assembly 3 forms a heat exchange surface, at least one second liquid inlet hole 30121 is arranged on the heat exchange surface, the rotor assembly 4 has a heat dissipation channel 401 whose liquid inlet is connected to the second liquid inlet hole 30121, and the end of the rotor assembly 4 along the axial direction is provided with a liquid outlet connected to the heat dissipation channel 401, the bearing assembly 5 is located between the shaft assembly 3 and the bearing assembly 1, the bearing assembly 5 has a second liquid outlet hole 5021 connected to the liquid outlet of the heat dissipation channel 401, the delivery pipe 6 is axially inserted into the shaft assembly 3 and is used to transport coolant, the outer wall of the delivery pipe 6 is provided with a first liquid infusion hole 601, and the first liquid infusion hole 601 and the second liquid inlet hole 30121 are axially staggered.

[0045] In the generator of this embodiment, the first liquid infusion hole 601 and the second liquid inlet hole 30121 are staggered. When the coolant is continuously sprayed to the heat exchange surface of the rotating shaft assembly 3 in the rotating state through the delivery pipe 6, the coolant will move circumferentially and axially along the heat exchange surface under the action of centrifugal force and continuous supply to continuously exchange heat with the rotating shaft assembly 3, and then enter the heat dissipation channel 401 through the second liquid inlet hole 30121 to exchange heat with the rotor assembly 4 inside, and finally flow out through the second liquid outlet hole 5021, so that the coolant can not only dissipate heat for the rotor assembly 4 but also The co-rotating shaft assembly 3 can be cooled, which greatly improves the heat dissipation efficiency of the rotor unit. In addition, the coolant is introduced into the first accommodating cavity 101 through the first liquid inlet hole 1031, and the coolant flows out from the first liquid outlet hole 1032 through the cooling channel 201. The stator assembly 2 is immersed in the coolant to increase the contact area between the stator assembly 2 and the coolant, so that the coolant can continuously and stably exchange heat with the stator assembly 2 during the operation of the generator to ensure the heat dissipation effect, which effectively solves the problem that the cooling method of the existing generator is difficult to meet the heat dissipation requirements of high-power generators.

[0046] In the related art, among the rotating parts of the generator, only a coolant flow channel is set inside the rotor assembly for heat dissipation. In this heat dissipation method, in order to avoid affecting the structural strength of the rotor assembly, the inner diameter of the channel for the coolant flow is usually set small, so the contact area between the coolant and the rotor assembly is also small, and the rotor assembly cannot be fully and efficiently cooled.

[0047] Since the heat generated by the rotor assembly 4 during operation will be quickly transferred to the shaft assembly 3, in the generator of this embodiment, the bearing assembly 5 has a hollow cavity inside, and lubricating oil is transported to the inner wall of the bearing assembly 5 through the delivery pipe 6. By utilizing the rotation characteristics of the rotor unit along the shaft, the lubricating oil can automatically move along the inner wall of the bearing assembly 5 and exchange heat under the action of centrifugal force. This method of dissipating heat for the shaft assembly 3 and the rotor assembly 4 at the same time can significantly improve the cooling efficiency of the rotor unit as a whole without increasing the inner diameter of the cooling channel inside the rotor assembly 4. At the same time, the overall structure is relatively simple and easy to manufacture and assemble.

[0048] Specifically, it should be noted that there is no limitation on the specific form of the stator unit, and it can be annular along the circumferential direction, or it can be multi-segmented along the circumferential direction, and the selection can be flexible.

[0049] Furthermore, the bearing assembly 1 includes an end cover 102, a casing 103 and a sealing ring 104, the casing 103 is located on the outer ring, the sealing ring 104 is located on the inner ring, the end cover 102 is located at both ends of the axial direction and is assembled and connected with the casing 103 and the sealing ring 104 respectively, and the end covers 102, the casing 103 and the sealing ring 104 at both ends together form a first accommodating cavity 101.

[0050] Preferably, the sealing ring 104 is a glass fiber reinforced plastic sealing ring, and the sealing ring 104 and the end covers 102 on both sides are sealed by gluing or O-rings.

[0051] The specific positions of the first liquid inlet 1031 and the first liquid outlet 1032 are not limited, and they may be located on the end cover 102 or opened on the casing 103 , which can be flexibly selected according to needs.

[0052] Preferably, the generator of this embodiment is placed horizontally, that is, the axial direction of the generator is horizontal. In order to allow the coolant to fully contact the stator assembly 2, the first liquid inlet 1031 and the first liquid outlet 1032 are located at the top of the casing 103, such as Figure 2 As shown, the first liquid inlet 1031 is close to the right end of the casing 103 , and the first liquid outlet 1032 is close to the left end of the casing 103 .

[0053] It should be noted that the axial direction of the generator is not strictly limited to the horizontal direction, and can also be set at a certain angle with the horizontal direction.

[0054] In a possible embodiment, the shaft assembly 3 includes a main body 301, and the main body 301 includes a first connecting section 3011, a heat exchange section 3012 and a second connecting section 3013 connected in sequence along the axial direction. The rotor assembly 4 is sleeved on the heat exchange section 3012, and the inner diameter of the heat exchange section 3012 is larger than the first connecting section 3011 and the second connecting section 3013. The second liquid inlet hole 30121 is located on the inner wall of the heat exchange section 3012. In this form of the main body 301, the inner walls of the first connecting section 3011, the heat exchange section 3012 and the second connecting section 3013 can form an annular groove body. Under the action of centrifugal force, the lubricating oil transported by the first liquid infusion hole 601 in the delivery pipe 6 can be restricted in the groove body, so that the lubricating oil can only enter the second liquid inlet hole 30121 after heat exchange with the inner wall of the heat exchange section 3012, which can effectively prevent the lubricating oil from moving freely inside the main body 301.

[0055] Specifically, there is no limitation on the relationship between the outer diameters of the first connecting section 3011, the heat exchange section 3012 and the second connecting section 3013. The three can have equal outer diameters, or the outer diameter of the heat exchange section 3012 can be larger than the first connecting section 3011 and the second connecting section 3013. The choice can be flexible.

[0056] In a possible embodiment, the heat exchange section 3012 forms a guide surface 3014 with the connecting surfaces on the inner sides of the first connecting section 3011 and the second connecting section 3013, respectively. The inner diameter of the guide surface 3014 gradually increases in the direction close to the heat exchange section 3012. The second liquid inlet hole 30121 is located on the inner wall of the heat exchange section 3012 close to one end of the first connecting section 3011. The first liquid inlet hole 601 of the delivery tube 6 is arranged corresponding to the guide surface 3014 close to the second connecting section 3013. This form of the guide surface 3014, when the first After the coolant output from the infusion hole 601 reaches the guide surface 3014 close to the second connecting section 3013, under the action of centrifugal force, the coolant will move faster along the guide surface 3014 toward the heat exchange section 3012 and the guide surface 3014 close to the first connecting section 3011. In this way, the flow speed of the coolant can be increased, which not only enables the coolant to enter the second liquid inlet hole 30121 faster, but also increases the flow range of the coolant, so that the coolant can more comprehensively cover the inner wall of the heat exchange section 3012, thereby improving the heat exchange effect.

[0057] It can be understood that, as an alternative embodiment, the positions of the first connecting section 3011 and the second connecting section 3013 can also be swapped; the first infusion hole 601 can also be set corresponding to each guide surface 3014 respectively, and the second liquid inlet hole 30121 is located in the middle of the heat exchange section 3012, and the coolant flows from the heat exchange section 3012 toward the middle and finally enters the second liquid inlet hole 30121.

[0058] There is no limitation on the specific number of the second liquid inlet holes 30121 on the heat exchange section 3012 , and it can be one or multiple arranged along the circumferential direction, which can be selected according to the number of the heat dissipation channels 401 in the rotor assembly 4 .

[0059] In a possible embodiment, the coolant in the delivery pipe 6 is lubricating oil, the bearing assembly 5 includes a connecting bearing 501 and a bearing seat 502, the first connecting section 3011 and the second connecting section 3013 are respectively provided with bearing assemblies 5, the first connecting section 3011 and the second connecting section 3013 are respectively connected to the inner ring of the corresponding connecting bearing 501, the outer ring of the connecting bearing 501 is assembled and connected to the bearing assembly 1 through the bearing seat 502, the inner walls of the first connecting section 3011 and the second connecting section 3013 are respectively provided with lubrication grooves 3015, and the lubrication grooves 3015 are provided with lubrication holes connected to the connecting bearing 501 3016, a second infusion hole 602 is provided at the position of the outer wall of the delivery tube 6 corresponding to the lubrication groove 3015. By setting this type of lubrication groove 3015 and lubrication hole 3016, the lubricating oil can not only cool the shaft assembly 3 and the rotor assembly 4, but also be used to lubricate the connecting bearing 501. The delivery process of the cooling and lubricating lubricating oil can be completed simultaneously through a single delivery tube 6. In addition, by setting the inner diameter of the main body 301 and setting the lubrication groove 3015, the two lubricating oils with different functions can flow into the corresponding holes more effectively, thereby ensuring the reliability of the cooling and lubrication processes.

[0060] Specifically, there is no limitation on the specific structural form of the lubrication groove 3015 , which may be an annular groove body or a multi-segment groove body arranged at axial intervals, and may be selected according to the needs, wherein the number and position of the lubrication holes 3016 may correspond to the lubrication groove 3015 .

[0061] In a possible embodiment, the bearing assembly 5 also includes a sealing ring 503 connected to the side of the bearing seat 502 close to the rotor assembly 4, and the sealing ring 503 is respectively abutted against one end of the rotor assembly 4 and the inner ring wall of the bearing assembly 1. The bearing assembly 1, the two sealing rings 503 and the rotor assembly 4 together form a sealed cavity 701. The sealing ring 503, the bearing seat 502, the connecting bearing 501, the main body 301 and the rotor assembly 4 together form a first liquid discharge cavity 702. The second liquid outlet 5021 is located in the bearing seat 502. The liquid outlet of the heat dissipation channel 401 is connected with the second liquid outlet 5021 through the first liquid discharge cavity 702. By setting the sealing ring 503, the coolant can be prevented from entering the sealed cavity 701 when it flows out, and the friction between the coolant and the bearing assembly 1 when the rotor assembly 4 rotates can be prevented, which can prevent the coolant from being stirred, thereby ensuring that the rotor assembly 4 can work normally and reliably.

[0062] Specifically, there is no limitation on the connection method between the sealing ring 503 and the bearing seat 502. The two may be integrally formed components, or may be components connected by another connection step such as welding, and the selection may be made according to actual needs.

[0063] In a possible implementation, Figure 1 As shown, one end of the main body 301 where the second connecting section 3013 is located is closed, and one end of the main body 301 where the first connecting section 3011 is located is provided with an opening, and the delivery pipe 6 extends into the interior of the main body 301 through the opening; the generator also includes a first cover plate 8 and a second cover plate 9, the first cover plate 8 is located on a side of the first connecting section 3011 away from the second connecting section 3013 and is sleeved on the delivery pipe 6, the periphery of the first cover plate 8 is assembled and connected with the bearing component 1, and the first cover plate 8 is provided with a first discharge port 801 corresponding to the second liquid outlet hole 5021 on the side thereof; the second cover plate 9 is sleeved on the first The second connecting section 3013 is located on the side of the bearing assembly 5 away from the rotor assembly 4. The periphery of the second cover plate 9 is assembled and connected to the bearing assembly 1. The second cover plate 9 is provided with a second discharge port 901 at the second liquid outlet 5021 on the corresponding side. The first cover plate 8 and the second cover plate 9 are provided to seal the outer side of the bearing assembly 5 to prevent the lubricating oil entering the connecting bearing 501 from directly flowing out of the generator from the connecting bearing 501. The lubricating oil at the connecting bearing 501 can be combined and then discharged from the unified second discharge port 901, thereby improving the reliability and safety of the lubricating oil discharge.

[0064] Specifically, Figure 1 As shown, a second drainage chamber 703 is formed between the first cover plate 8 and the second cover plate 9 and the bearing assembly 5 on the corresponding side respectively. The second drainage chamber 703 is connected with the first drainage chamber 702 via the bearing assembly 5 and the second liquid outlet 5021 respectively. The lubricating oil at the bearing assembly 5 and the lubricating oil in the first drainage chamber 702 enter the second drainage chamber 703 and merge, and then are discharged uniformly from the second discharge port 901, so that the same discharge port can receive all the lubricating oil, thereby improving the convenience of collecting the discharged lubricating oil.

[0065] Furthermore, if Figure 1 As shown, the second liquid discharge chamber 703 formed by the first cover plate 8 and the second cover plate 9 respectively discharges liquid through its own second discharge port 901 .

[0066] In a possible implementation, Figure 3As shown, the shaft assembly 3 also includes a grate ring 302 sleeved on the second connecting section 3013, the second cover plate 9 is abutted against the outer wall of the second connecting section 3013 through the grate ring 302, the grate ring 302 is matched with the second connecting section 3013 through the first grate structure on its outer circumference, the first grate structure and the second connecting section 3013 are sealed and form a sealed cavity 3021; ​​the second cover plate 9 is provided with a first gas transmission channel 902 and an air inlet 903 for communicating with an external gas source ... The entrance of the first gas transmission channel 902 is connected with the air inlet 903, and the outlet of the first gas transmission channel 902 is connected with the sealing chamber 3021. The air flow is introduced into the sealing chamber 3021 through the air inlet 903 and the first gas transmission channel 902. The air curtain formed by the air flow cooperates with the first comb tooth structure, which can effectively ensure the sealing between the second cover plate 9 and the second connecting section 3013 to prevent the coolant from leaking therefrom, and can also prevent the air flow from flowing out of the sealing chamber 3021 in large quantities, thereby ensuring the reliability of the air curtain seal.

[0067] Specifically, Figure 4 As shown, the first comb tooth structure on the outer peripheral surface of the comb tooth ring 302 is distributed in two sections along the axial direction, and a sealing cavity 3021 is formed between the two sections of the first comb tooth structure. After the high-pressure airflow enters the sealing cavity 3021, the first comb tooth structures on both sides can respectively block the air paths on both sides of the sealing cavity 3021 along the axial direction to prevent a large amount of airflow from entering the connecting bearing 501, and can also prevent the airflow from directly flowing out and failing to achieve the sealing effect of the air curtain.

[0068] In addition, the rotating shaft assembly 3 further includes a power flange 303 disposed on the second connecting section 3013 , and the power flange 303 is used to connect to an external power source.

[0069] In a possible implementation, Figure 3 As shown, the sealing ring 503 is sealed with one end of the rotor assembly 4 through the second comb tooth structure 407; the bearing assembly 1 also has a second air supply channel 1021, the inlet of the second air supply channel 1021 is connected with the air inlet 903, and the outlet of the second air supply channel 1021 is connected with the sealing chamber 701. The air flow is introduced into the sealing chamber 701 through the second air supply channel 1021 and fills the sealing chamber 701. The air flow can form a more reliable sealing form at the second comb tooth structure 407 of the two sealing rings 503 respectively. The comb tooth structure and the air curtain work together to prevent the lubricating oil in the first drainage chamber 702 from entering the sealing chamber 701, so that the sealing chamber 701 remains dry, ensuring that the rotor assembly 4 has a lower friction resistance when rotating.

[0070] It can be understood that, as an alternative implementation, the second gas delivery channel 1021 can also be disposed inside the blocking ring 503 .

[0071] Specifically, Figure 4 As shown, an air inlet 903 is provided on the second cover plate 9, and high-pressure gas can be supplied to the first air supply channel 902 and the second air supply channel 1021 at the same time through the air inlet 903. One air flow can prevent the coolant from leaking into the interior of the generator, and the other air flow can prevent the coolant from leaking into the sealing cavity 701, which can effectively improve the stability and reliability of the coolant cooling process. Compared with simply setting an air curtain at the bearing, the sealing form formed by the comb tooth structure and the air curtain is more reliable.

[0072] It should be noted that the specific number of the first gas transmission channel 902 and the second gas transmission channel 1021 is not limited, and can be one or more respectively, which can be selected according to the sealing requirements; in addition, Figure 3 As shown, since the figure only shows the outlet of the heat dissipation channel 401 located at one end close to the second cover plate 9, the first gas supply channel 902 and the air inlet 903 are only set at the second cover plate 9. If the outlets of multiple heat dissipation channels 401 are opened at both ends of the rotor assembly 4 in the axial direction, the first gas supply channel 902 and the air inlet 903 can be set at both the first cover plate 8 and the second cover plate 9, and the second gas supply channel 1021 can be set at the corresponding position of the supporting assembly 1.

[0073] In a possible embodiment, the stator assembly 2 includes a stator core 202 and a winding 203 arranged on the stator core 202, the cooling channel 201 includes a first cooling segment 2011, a second cooling segment 2012 and a third cooling segment 2013 extending along the axial direction, the first cooling segment 2011 is formed inside the stator core 202, the gap between the winding 203 and the stator core 202 forms the second cooling segment 2012, the gap between the stator core 202 and the inner ring of the bearing assembly 1 forms the third cooling segment 2013, and the cooling channel 201 is formed along the inner ring of the stator core 202. The cooling liquid enters the first accommodating cavity 101 through the first liquid inlet hole 1031 and flows through the stator assembly 2 in multiple paths, which can further increase the contact area between the cooling liquid and the stator assembly 2. The first cooling segment 2011 can be used to cool the stator core 202, the second cooling segment 2012 can be used to cool the winding 203, and the third cooling segment 2013 can be used to cool the inner ring of the bearing assembly 1. This not only has a better cooling effect, but also can prevent the heat of the stator assembly 2 from being radiated from the inner ring of the bearing assembly 1 to the rotor assembly 4.

[0074] In a possible embodiment, the rotor assembly 4 includes a protective cover, a rotor core 402 and a permanent magnet 403. The protective cover and the heat exchange section 3012 are enclosed to form an installation space. The rotor core 402 and the permanent magnet 403 are arranged in the installation space in sequence from the outside to the inside along the radial direction. Each heat dissipation channel 401 includes a first heat dissipation section and a second heat dissipation section that are alternately arranged. The first heat dissipation section and the second heat dissipation section are both located inside the rotor core 402 and are connected end to end in sequence. The first heat dissipation section extends radially along the rotor core 402, and the second heat dissipation section extends axially along the rotor core 402. The liquid inlet of the heat dissipation channel 401 is located on the inner wall of the rotor core 402, and the liquid outlet of the heat dissipation channel 401 is located on the protective cover. The heat dissipation channel 401 has a simple structure and is easy to process and manufacture. The second heat dissipation section allows the coolant to fully contact the rotor core 402 to ensure the cooling effect.

[0075] Specifically, Figure 1 As shown, it only shows that each heat dissipation channel 401 has a first heat dissipation section and a second heat dissipation section. It can be understood that the heat dissipation channel 401 can also have multiple second heat dissipation sections arranged at intervals along the radial direction. The multiple second heat dissipation sections are connected end to end in sequence through a corresponding number of first heat dissipation sections, so that the coolant flows back along one side of the axial direction to fully absorb the heat of the rotor assembly 4.

[0076] Further, such as Figure 3 As shown, the protective sleeve includes a retaining ring 404, a sleeve 405 and a locking nut 406, the retaining rings 404 at both ends and the sleeve 405 radially sleeved on the outside of the permanent magnet 403, the outer wall of the heat exchange section 3012 extends radially outward to form a retaining platform, wherein the retaining ring 404 at one end abuts against the retaining platform, and the retaining ring 404 at the other end is fixed in axial position by the locking nut 406.

[0077] Preferably, the sheath 405 is a carbon fiber sheath, and the rotor core 402 and the stator core 202 are both silicon steel sheets.

[0078] In addition, if Figure 3 As shown, the second liquid outlet hole of the heat dissipation channel 401 is located on the left retaining ring 404, and the second liquid outlet hole extends along the axial direction. Along the downstream direction, the second liquid outlet hole is gradually obliquely arranged along the direction away from the axis to form an oil-throwing hole, so that the coolant in the heat dissipation channel 401 can be smoothly thrown into the first liquid discharge cavity 702 under the rotation of the rotor assembly 4.

[0079] Among them, Figure 4 and Figure 5 As shown, the second comb tooth structure 407 on the left side is located on the retaining ring 404 on the left side, and the second comb tooth structure 407 on the right side is located on the locking nut 406 on the right side.

[0080] In this embodiment, combined with Figures 1 to 3 as well as Figure 6 As shown, the generator is placed horizontally, and the sealed cavity 701 is a pure gas cavity filled with gas;

[0081] The sealing gas in the sealing chamber 701 enters the first liquid discharge chamber 702 through the second grate structure 407 between the left sealing ring 503 and the rotor assembly 4, the sealing gas in the sealing chamber 3021 on the left enters the second liquid discharge chamber 703 on the left through the grate ring 302, the lubricating oil at the left connecting bearing 501 enters the second liquid discharge chamber 703, the coolant and the sealing gas in the first liquid discharge chamber 702 on the left enter the second liquid discharge chamber 703 through the second liquid outlet 5021 provided at the bottom of the bearing seat 502, the coolant and the sealing gas in the second liquid discharge chamber 703 are finally discharged through the second discharge port 901, and the first liquid discharge chamber 702 and the second liquid discharge chamber 703 on the left are both gas-liquid mixing chambers;

[0082] The sealing gas in the sealing chamber 701 enters the first liquid discharge chamber 702 on the right side through the second comb structure 407 between the right sealing ring 503 and the rotor assembly 4, and the coolant and sealing gas in the first liquid discharge chamber 702 on the right side enter the second liquid discharge chamber 703 through the second liquid outlet 5021 arranged at the bottom of the bearing seat 502, and the lubricating oil at the right connecting bearing 501 enters the second liquid discharge chamber 703, and the second liquid discharge chamber 703 on the right side is connected to the space inside the main body 301, and the excess lubricating oil inside the main body 301 enters the second liquid discharge chamber 703 and is discharged through the first discharge port 801 at the bottom along with the original lubricating oil and sealing gas.

[0083] The best cooling effect of each chamber and channel can be maintained by controlling parameters such as the pressure and flow of the lubricating oil and the sealing airflow input to the rotor assembly 4 and the stator assembly 2 .

[0084] According to an embodiment of the present invention, on the other hand, an aviation power system is provided, which includes: the above-mentioned generator, a first coolant delivery device and a second coolant delivery device, the first coolant delivery device is respectively connected to the first liquid inlet hole 1031 and the first liquid outlet hole 1032 of the stator unit of the generator, and the second coolant delivery device is respectively connected to the delivery pipe 6 of the generator and the second liquid outlet hole 5021 of the bearing assembly 5 of the generator.

[0085] In a possible implementation, the output end of the second coolant delivery device is connected to the delivery pipe 6, and the input end of the second coolant delivery device is respectively connected to the first discharge port 801 and the second discharge port 901. The first discharge port 801 and the second discharge port 901 can be returned to oil at the same time through an oil return structure, thereby improving the integration of the equipment layout.

[0086] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A generator, characterized in that: include: A stator unit comprises a bearing assembly (1) and a stator assembly (2), wherein the bearing assembly (1) is arranged in an annular shape and has a first accommodating cavity (101) therein, a first liquid inlet hole (1031) and a first liquid outlet hole (1032) in communication with the accommodating cavity are arranged on the outer wall of the bearing assembly (1), the inner ring of the bearing assembly (1) forms a working space along the radially inward space, the stator assembly (2) is arranged in the accommodating cavity, the stator assembly (2) has a cooling channel (201) in communication with the first accommodating cavity (101), and the first liquid inlet hole (1031) and the first liquid outlet hole (1032) are suitable for being in communication with an external cooling liquid source; A rotor unit is rotatably arranged in the working space, the rotor unit comprising a shaft assembly (3) and a rotor assembly (4), the rotor assembly (4) is sleeved on the outer side of the shaft assembly (3), the inner wall of the shaft assembly (3) forms a heat exchange surface, at least one second liquid inlet hole (30121) is arranged on the heat exchange surface, the rotor assembly (4) has a heat dissipation channel (401) whose liquid inlet is connected to the second liquid inlet hole (30121), and the end of the rotor assembly (4) along the axial direction is provided with a liquid outlet connected to the heat dissipation channel (401); A bearing assembly (5) is located between the rotating shaft assembly (3) and the bearing assembly (1), and the bearing assembly (5) has a second liquid outlet (5021) connected to the liquid outlet of the heat dissipation channel (401); A delivery pipe (6) is axially inserted into the interior of the rotating shaft assembly (3) and is used to deliver cooling liquid. The outer wall of the delivery pipe (6) is provided with a first liquid infusion hole (601), and the first liquid infusion hole (601) and the second liquid inlet hole (30121) are axially staggered.

2. The generator according to claim 1, characterized in that: The rotating shaft assembly (3) comprises a main body (301), the main body (301) comprises a first connecting section (3011), a heat exchange section (3012) and a second connecting section (3013) which are connected in sequence along the axial direction, the rotor assembly (4) is sleeved on the heat exchange section (3012), the inner diameter of the heat exchange section (3012) is larger than that of the first connecting section (3011) and the second connecting section (3013), and the second liquid inlet hole (30121) is located on the inner wall of the heat exchange section (3012).

3. The generator according to claim 2, characterized in that: The heat exchange section (3012) forms a guide surface (3014) with the inner connecting surfaces of the first connecting section (3011) and the second connecting section (3013), respectively; the inner diameter of the guide surface (3014) gradually increases in a direction approaching the heat exchange section (3012); the second liquid inlet hole (30121) is located on the inner wall of the heat exchange section (3012) close to one end of the first connecting section (3011); and the first liquid inlet hole (601) of the delivery pipe (6) is arranged corresponding to the guide surface (3014) close to the second connecting section (3013).

4. The generator according to claim 2, characterized in that: The coolant in the delivery pipe (6) is lubricating oil. The bearing assembly (5) comprises a connecting bearing (501) and a bearing seat (502). The first connecting section (3011) and the second connecting section (3013) are respectively provided with the bearing assembly (5). The first connecting section (3011) and the second connecting section (3013) are respectively connected to the inner ring of the corresponding connecting bearing (501). The outer ring of the connecting bearing (501) is assembled and connected to the bearing assembly (1) through the bearing seat (502). The inner walls of the first connecting section (3011) and the second connecting section (3013) are respectively provided with lubrication grooves (3015). The lubrication grooves (3015) are provided with lubrication holes (3016) communicating with the connecting bearing (501). The outer wall of the delivery pipe (6) is provided with a second infusion hole (602) at a position corresponding to the lubrication grooves (3015).

5. The generator according to claim 4, characterized in that: The bearing assembly (5) further comprises a sealing ring (503) connected to a side of the bearing seat (502) close to the rotor assembly (4); the sealing ring (503) is respectively abutted against one end of the rotor assembly (4) and the inner ring wall of the bearing assembly (1); the bearing assembly (1), the two sealing rings (503) and the rotor assembly (4) together form a sealed cavity (701); the sealing ring (503), the bearing seat (502), the connecting bearing (501), the main body (301) and the rotor assembly (4) together form a first liquid discharge cavity (702); the second liquid outlet hole (5021) is located on the bearing seat (502); and the liquid outlet of the heat dissipation channel (401) is connected to the second liquid outlet hole (5021) through the first liquid discharge cavity (702).

6. The generator according to claim 5, characterized in that: The end of the main body (301) where the second connecting section (3013) is located is closed, and the end of the main body (301) where the first connecting section (3011) is provided with an opening, and the delivery pipe (6) extends into the interior of the main body (301) through the opening; The generator further comprises a first cover plate (8) and a second cover plate (9); the first cover plate (8) is located on a side of the first connecting section (3011) away from the second connecting section (3013) and is sleeved on the delivery pipe (6); the periphery of the first cover plate (8) is assembled and connected to the bearing assembly (1); and the first cover plate (8) is provided with a first discharge port (801) at the side corresponding to the second liquid outlet (5021); The second cover plate (9) is sleeved on the second connecting section (3013) and is located on the side of the bearing assembly (5) away from the rotor assembly (4); the periphery of the second cover plate (9) is assembled and connected to the bearing assembly (1); and the second liquid outlet (5021) on the side corresponding to the second cover plate (9) is provided with a second discharge port (901).

7. The generator according to claim 6, characterized in that: The rotating shaft assembly (3) further comprises a grate ring (302) sleeved on the second connecting section (3013); the second cover plate (9) is in abutment with the outer wall of the second connecting section (3013) through the grate ring (302); the grate ring (302) is in abutment with the second connecting section (3013) through a first grate structure on its outer peripheral surface; the first grate structure is in abutment with the second connecting section (3013) to form a sealing cavity (3021); The second cover plate (9) is provided with a first gas delivery channel (902) and an air inlet (903) for communicating with an external gas source, the inlet of the first gas delivery channel (902) is communicated with the air inlet (903), and the outlet of the first gas delivery channel (902) is communicated with the sealing cavity (3021).

8. The generator according to claim 7, characterized in that: The sealing ring (503) is sealed and matched with one end of the rotor assembly (4) via a second comb tooth structure (407); The bearing assembly (1) further comprises a second gas delivery channel (1021), the inlet of the second gas delivery channel (1021) being in communication with the gas inlet (903), and the outlet of the second gas delivery channel (1021) being in communication with the sealed cavity (701).

9. The generator according to any one of claims 2 to 4, characterized in that: The stator assembly (2) comprises a stator core (202) and a winding (203) arranged on the stator core (202); the cooling channel (201) comprises a first cooling section (2011), a second cooling section (2012) and a third cooling section (2013) extending along the axial direction; the first cooling section (2011) is formed inside the stator core (202); the gap between the winding (203) and the stator core (202) forms the second cooling section (2012); the gap between the stator core (202) and the inner ring of the bearing assembly (1) forms the third cooling section (2013); And / or, the rotor assembly (4) comprises a protective sleeve, a rotor core (402) and a permanent magnet (403), the protective sleeve and the heat exchange section (3012) together form an installation space, the rotor core (402) and the permanent magnet (403) are arranged in sequence in the installation space from the outside to the inside along the radial direction, each of the heat dissipation channels (401) comprises a first heat dissipation section and a second heat dissipation section which are arranged alternately, the first heat dissipation section and the second heat dissipation section are both located inside the rotor core (402) and are connected end to end in sequence, the first heat dissipation section extends in the radial direction of the rotor core (402), the second heat dissipation section extends in the axial direction of the rotor core (402), the liquid inlet of the heat dissipation channel (401) is located on the inner wall of the rotor core (402), and the liquid outlet of the heat dissipation channel (401) is located on the protective sleeve.

10. An aviation power system, characterized in that: include: The generator according to any one of claims 1 to 9; A first coolant delivery device, respectively connected to the first liquid inlet (1031) and the first liquid outlet (1032) of the stator unit of the generator; The second coolant delivery device is respectively connected to the delivery pipe (6) of the generator and the second liquid outlet hole (5021) of the bearing assembly (5) of the generator.

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