Evaporative cooling device for generator rotor and generator

Abstract

The utility model relates to the field of generators, particularly provides an evaporative cooling device for a generator rotor and a generator, and aims to solve the problems of limited selectable range of a cooling medium, phase change position deviation and backflow. In order to achieve the purpose, according to the evaporative cooling device for the generator rotor, the throttling assembly is arranged in the liquid return pipe fitting, on one hand, the pressure of a cooling medium can be reduced, the throttling effect is generated when the cooling medium flows through the throttling assembly, and therefore the pressure of the cooling medium is reduced; the problem of phase change position offset caused by boiling point rise due to too high pressure of the cooling medium is solved, the running stability of the rotor is ensured, and the optional range of the cooling medium is widened; on the other hand, backflow of the cooling medium can be prevented, it is ensured that the cooling medium circulates in the preset direction, and therefore the cooling effect of the rotor is improved. In addition, the evaporative cooling device can enhance the adaptability of the system to different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of generators, specifically providing an evaporative cooling device for a generator rotor and a generator. Background Technology

[0002] In evaporative cooling generators, the stator typically uses evaporative cooling technology for heat dissipation, while the rotor usually uses air cooling. Compared to air cooling, evaporative cooling uses a cooling medium with higher latent heat of phase change, is more environmentally friendly, safer, and corrosion-resistant. Due to its significant advantages, evaporative cooling technology is increasingly being adopted for rotor cooling.

[0003] Currently, when evaporative cooling technology is applied to cool rotors, channels large enough to accommodate cooling pipes need to be pre-machined on the rotor's magnetic pole coils. These cooling pipes are connected to the condenser via a gas collecting pipe, and the condensed liquid medium is transported back to the cooling pipes through a return pipe, thus forming a complete closed-loop circulation circuit to cool the rotor. However, as the rotor speed increases, the increased centrifugal force leads to a rise in the pressure of the cooling medium within the cooling pipes, causing an increase in the boiling point of the cooling medium. This phenomenon not only limits the range of cooling media that can be selected but also causes phase change position shifts and working fluid reflux problems, thereby affecting the rotor's cooling and heat dissipation effect.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] To address at least one problem in the prior art, namely the limited range of selectable cooling media, phase change position deviation, and backflow issues, this application provides an evaporative cooling device for a generator rotor, the evaporative cooling device comprising:

[0006] The condenser, cooling pipes, and return pipes are arranged sequentially according to the flow path of the cooling medium.

[0007] A throttling assembly is disposed within a return pipe and is configured to reduce the pressure of the cooling medium while preventing the cooling medium from flowing back.

[0008] In the preferred embodiment of the above-mentioned evaporative cooling device, the throttling component includes:

[0009] A baffle is provided inside the return pipe fitting, and a connecting hole is provided thereon to allow the condenser to form a passage with the cooling pipe.

[0010] A cover plate, rotatably disposed on the backflow side of the baffle, and configured to rotate between a first position and a second position to connect or disconnect the passage between the condenser and the cooling pipe.

[0011] In the preferred embodiment of the above-mentioned evaporative cooling device, the throttling component further includes a connecting block, which is disposed on the side of the cover plate near the baffle.

[0012] When the cover plate is rotated to the first position, the connecting block blocks the connecting hole, thereby disconnecting the passage between the condenser and the cooling pipe;

[0013] When the cover plate rotates from the first position to the second position, the connecting block disengages from the connecting hole, thereby connecting the condenser with the cooling pipe.

[0014] In the preferred embodiment of the above-mentioned evaporative cooling device, the throttling component further includes a connecting rod and a counterweight. One end of the connecting rod is connected to the side of the connecting block away from the cover plate, and the other end passes through the connecting hole and is provided with the counterweight.

[0015] In the preferred embodiment of the above-mentioned evaporative cooling device, the connecting rod is made of a rigid material or a flexible material.

[0016] In the preferred embodiment of the above-mentioned evaporative cooling device, the connecting hole is a conical hole, and the radial dimension of the connecting hole gradually increases from the front side of the baffle to the back side.

[0017] The radial dimension of the connecting block gradually increases from the upstream side of the baffle to the downstream side.

[0018] In the preferred embodiment of the above-mentioned evaporative cooling device, the maximum radial dimension of the counterweight is greater than the maximum radial dimension of the frontal side located in the connecting hole.

[0019] In the preferred embodiment of the above-mentioned evaporative cooling device, the baffle is inclinedly disposed inside the return liquid pipe; or

[0020] The baffle is radially disposed inside the return pipe fitting.

[0021] In the preferred embodiment of the above-mentioned evaporative cooling device, the liquid return pipe includes a liquid return pipe and a liquid distribution pipe. One end of the liquid distribution pipe is connected to the cooling pipe, and the other end is connected to the liquid return pipe. The throttling component is provided inside the liquid return pipe.

[0022] This application also provides a generator, which includes the evaporative cooling device described in any of the above preferred technical solutions.

[0023] Those skilled in the art will understand that the evaporative cooling device for generator rotors provided in this application, by incorporating a throttling component within the return pipe, can reduce the pressure of the cooling medium. This throttling effect, as the cooling medium flows through the throttling component, reduces the cooling medium pressure and solves the problem of phase change position shift caused by excessively high cooling medium pressure leading to an increase in boiling point. This ensures rotor operational stability and broadens the range of selectable cooling media. Furthermore, it prevents cooling medium backflow, ensuring that the cooling medium circulates in a predetermined direction, thereby improving the rotor's cooling effect. In addition, the evaporative cooling device of this application can enhance the system's adaptability to different operating conditions.

[0024] Furthermore, by installing a baffle inside the return pipe and rotatably installing a cover plate on the back flow side of the baffle, on the one hand, the cooling medium can generate a throttling effect when flowing through the connecting hole, effectively reducing the pressure of the cooling medium, thereby avoiding the phase change position shift caused by the boiling point rise due to excessive pressure. On the other hand, when the cooling medium flows in the reverse direction, it can push the cover plate to close the connecting hole, cut off the passage between the condenser and the cooling pipe, and prevent the cooling medium from flowing back.

[0025] Furthermore, by setting a connecting block on the side of the cover plate near the baffle, the connecting block can block the connecting hole under the action of the cover plate, thereby preventing the backflow of the cooling medium. In addition, the connecting block can also disengage from the connecting hole under the action of the cooling medium, so that the cooling medium produces a throttling effect when flowing through the connecting hole, effectively reducing the pressure of the cooling medium, thereby preventing the phase change position shift caused by the increase of the boiling point of the cooling medium.

[0026] Furthermore, by setting a connecting rod and a counterweight on the side of the connecting block away from the cover plate, the pressure reduction of the cooling medium can be further adjusted.

[0027] Furthermore, by making the maximum radial dimension of the counterweight larger than the maximum radial dimension on the flow-facing side of the connecting hole, the counterweight is effectively prevented from accidentally coming out of the connecting hole under the impact of the cooling medium, thus ensuring the pressure reduction effect of the throttling component. Attached Figure Description

[0028] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0029] Figure 1 This is a schematic diagram of the evaporative cooling device for a generator rotor used in this application;

[0030] Figure 2 This is a cross-sectional view of the first embodiment of the throttling component of this application;

[0031] Figure 3 yes Figure 2 Cross-sectional view of the middle cover plate in the first position;

[0032] Figure 4 This is a cross-sectional view of a second embodiment of the throttling component of this application;

[0033] Figure 5 yes Figure 4 Cross-sectional view of the middle cover plate in the first position;

[0034] Figure 6 This is a cross-sectional view of a third embodiment of the throttling component of this application;

[0035] Figure 7 yes Figure 6 Cross-sectional view of the middle cover plate in the first position.

[0036] List of reference numerals in the attached diagram:

[0037] 1. Rotor; 11. Connecting shaft; 12. Rotor support; 13. Magnetic yoke; 14. Magnetic pole structure; 141. Pole body; 142. Magnetic pole coil; 143. Pole shoe; 2. Evaporative cooling device; 21. Condenser; 22. Cooling pipe; 23. Liquid return fitting; 231. Liquid return pipe; 232. Liquid distribution pipe; 24. Throttling assembly; 241. Baffle; 2411. Connecting hole; 242. Cover plate; 243. Connecting block; 244. Connecting rod; 245. Counterweight; 246. Rotating shaft; 25. Gas collecting pipe. Detailed Implementation

[0038] Preferred embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0039] It should be noted that in the description of this application, the terms "upper", "lower", "inner", "bottom", "end", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0040] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "set up," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] like Figure 1As shown, in order to solve the problems of limited selection range of cooling medium, phase change position displacement and backflow, this application provides an evaporative cooling device 2 for generator rotor 1. When cooling generator rotor 1, the evaporative cooling device 2 can not only prevent the cooling medium from flowing back, but also reduce the cooling medium pressure, solve the problem of phase change position displacement caused by the boiling point increase due to excessive cooling medium pressure, ensure the stability of rotor 1 operation and broaden the selection range of cooling medium.

[0042] See Figure 1 The generator rotor 1 comprises a connecting shaft 11, a rotor support 12, a magnetic yoke 13, and a magnetic pole structure 14. The rotor support 12 is nested on the connecting shaft 11, and the magnetic yoke 13 is nested on the rotor support 12, allowing the rotor support 12 and the magnetic yoke 13 to rotate with the rotation of the connecting shaft 11. The magnetic pole structure 14 includes a pole body 141, a magnetic pole coil 142, and a pole shoe 143. The pole body 141 is mounted on the outside of the magnetic yoke 13 and is evenly distributed circumferentially on the outside of the magnetic yoke 13. The magnetic pole coil 142 is nested on the pole body 141 and fixed by a magnetic pole support plate. There is inter-turn insulation between each turn of the magnetic pole coil 142 to effectively prevent inter-turn short circuits.

[0043] It should be noted that, in other embodiments, the rotor support 12 and the connecting shaft 11 can be integrally formed. And / or, the magnetic yoke 13 is integrally formed with the rotor support 12. And / or, the magnetic yoke 13 and the pole body 141 can also be integrally formed. And / or, the pole body 141 and the pole shoe 143 are integrally formed.

[0044] See Figure 1 The evaporative cooling device 2 includes a condenser 21, cooling pipes 22, a gas collecting pipe 25, a liquid return pipe 23, and a throttling assembly 24. These components are arranged sequentially along the cooling medium flow direction as follows: condenser 21 → liquid return pipe 23 → cooling pipe 22 → gas collecting pipe 25 → condenser 21, forming a closed-loop circuit to cool the magnetic pole coil 142. Specifically, the cooling pipes 22 adopt a multi-parallel design, corresponding one-to-one with the multi-turn magnetic pole coil 142, and are embedded in the grooves of their corresponding magnetic pole coils 142. Each cooling pipe 22 has a first connector and a second connector at both ends, with the first connector located above the second connector. The first connector is connected to the condenser 21 via the gas collecting pipe 25, and the second connector is connected to the condenser 21 via the liquid return pipe 23, thus forming a complete cooling medium circulation loop. This allows for cooling of the magnetic pole coil 142 during rotor operation, ensuring that the magnetic pole coil 142 operates at a suitable temperature.

[0045] It should be noted that this application does not limit the cooling medium; any phase change medium suitable for cooling the magnetic pole coil 142 can be used. Accordingly, the condenser 21 can be adapted to different forms, such as a water-cooled condenser 21, depending on the selected medium type. To avoid electrical connection between the rotor 1 and the cooling pipe 22, the connector is made of insulating material.

[0046] It should also be noted that in other preferred embodiments, the gas collecting pipe 25 is not mandatory, and those skilled in the art can choose to include it as needed. In the absence of a gas collecting pipe 25, multiple condensers 21 corresponding one-to-one with the cooling pipes 22 can be provided, allowing each cooling pipe 22 to be connected to its corresponding condenser 21.

[0047] See next Figures 1 to 3 The return pipe fitting 23 includes a return pipe 231 and a distribution pipe 232. One end of the distribution pipe 232 is connected to multiple cooling pipes 22, and the other end is connected to the return pipe 231. A throttling component 24 is installed inside the return pipe 231. The throttling component 24 includes a baffle 241 and a cover plate 242. The baffle 241 is located at the connection between the return pipe 231 and the distribution pipe 232. Its bottom end is located at the bottom of the return pipe 231, and its top end is inclined upward in the opposite direction to the flow direction of the cooling medium, forming a throttling structure with a guiding function. A connecting hole 2411 is provided on the baffle 241, which allows the return pipe 231 and the distribution pipe 232 to communicate, thereby forming a passage between the condenser 21 and the cooling pipes 22. A cover plate 242 is provided on the back-flow side of the baffle 241. The cover plate 242 is rotatably mounted on the baffle 241 via a rotating shaft 246, allowing it to rotate between a first position and a second position, thereby connecting or disconnecting the return pipe 231 and the distributor pipe 232. When the cover plate 242 is in the first position, it completely closes the connecting hole 2411, cutting off the connection between the return pipe 231 and the distributor pipe 232, thus disconnecting the passage between the condenser 21 and the cooling pipe 22. When the cover plate 242 rotates from the first position to the second position, the cooling medium on the front-flow side of the baffle 241, i.e., the cooling medium in the return pipe 231, experiences a throttling effect when flowing through the connecting hole 2411. This effect effectively reduces the pressure of the cooling medium, thereby preventing phase change position shift caused by an increase in the boiling point of the cooling medium.

[0048] It should be noted that the first position refers to the position where the cover plate 242 completely closes the connecting hole 2411, thus disconnecting the passage between the return pipe 231 and the distribution pipe 232. The second position refers to the position where the cover plate 242 reaches its maximum opening angle relative to the baffle 241, at which point the passage between the return pipe 231 and the distribution pipe 232 is connected. This application does not limit the size of the connecting hole 2411, as long as the cover plate 242 disconnects the passage between the return pipe 231 and the distribution pipe 232 when in the first position.

[0049] During the rotation of rotor 1, centrifugal force causes the pressure of the cooling medium at the inlet side of the throttling assembly 24 to be greater than that at the outlet side, thereby pushing the cover plate 242 to rotate from the first position to the second position. This causes the cover plate 242 to form an angle with the baffle 241, which in turn causes the connecting block 243 to disengage from the connecting hole 2411, creating a flow gap and connecting the cooling pipe 22 with the condenser 21. When rotor 1 completely stops rotating, due to the gravity difference between the cooling medium in the cooling pipe 22 and the return pipe 23, the medium flows in the opposite direction, pushing the cover plate 242 to rotate to the first position, cutting off the connection between the return pipe 231 and the distribution pipe 232, thereby effectively preventing the cooling medium from flowing back.

[0050] It should be noted that this application does not limit the tilt angle of the baffle 241, as long as the baffle 241 and the cover plate 242 cooperate to connect or disconnect the passage between the condenser 21 and the cooling pipe 22. For example, the tilt angle can be any angle such as 30°, 45°, or 60°.

[0051] Of course, the location and arrangement of the baffle 241 are not fixed in this application, and those skilled in the art can adjust them as needed. For example, the baffle 241 can also be located in the middle of the return pipe or at any other location in the return pipe. And / or, the baffle 241 can also be radially arranged inside the return pipe, such as... Figures 4 to 5 Alternatively, the baffle 241 can be positioned at the bottom of the return pipe 231, with its top angled upwards along the direction of cooling medium flow. Figures 6 to 7 At this point, the tilt angle of the baffle 241 is not limited and can be any angle such as 30°, 45°, or 60°. Here, radial refers to... Figures 2 to 7 The radial extension direction shown is perpendicular to the central axis of the return pipe.

[0052] It should be noted that the method by which the cover plate 242 is rotatably connected to the baffle 241 is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the cover plate 242 can also be rotatably connected to the baffle 241 via a hinge.

[0053] like Figures 2 to 7As shown, the throttling assembly 24 also includes a connecting block 243, a connecting rod 244, and a counterweight 245. The connecting block 243 is located on the side of the cover plate 242 near the baffle 241. The connecting rod 244 is made of a rigid material. One end of the connecting rod 244 is connected to the side of the connecting block 243 away from the cover plate 242, and the other end passes through the connecting hole 2411 and is fitted with the counterweight 245. At this time, the dimension of the connecting rod 244 along the axial direction of the return pipe 231 is larger than the dimension of the connecting hole 2411 along the axial direction of the return pipe 231, giving the connecting rod 244 a length redundancy, which facilitates the rotation of the cover plate 242 between the first and second positions. With the above arrangement, when the rotor 1 is in operation, the centrifugal force generated by the rotation creates a pressure difference between the inlet and outlet cooling media of the throttling assembly 24, pushing the cover plate 242 to overcome the centrifugal force on the counterweight 245, and causing the connecting block 243 to disengage from the connecting hole 2411. This action enhances the throttling effect and thus significantly increases the pressure reduction. When rotor 1 stops rotating, counterweight 245 drives cover plate 242 to reset, so that connecting block 243 can be inserted into connecting hole 2411 to form mechanical seal, cutting off the connection between return pipe 231 and distributor pipe 232.

[0054] Of course, the material of the connecting rod 244 is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the material of the connecting rod 244 can also be a flexible material. Since the connecting rod 244 has length redundancy, when the pressure difference between the inlet and outlet of the throttling assembly 24 is relatively large, the cover plate 242 will not block the connecting hole 2411 when it is rotated to the second position. At this time, the throttling assembly 1 is equivalent to an orifice plate structure.

[0055] It should be noted that in other preferred embodiments, the connecting rod 244 and the counterweight 245 are not essential, and those skilled in the art can choose them as needed. Even without the connecting rod 244 and the counterweight 245, the connecting block 243 alone can still connect or disconnect the condenser 21 from the cooling pipe 22. Specifically, when the cover plate 242 rotates to the first position, the connecting block 243 blocks the connecting hole 2411, thus disconnecting the condenser 21 from the cooling pipe 22. When the cover plate 242 rotates from the first position to the second position, the connecting block 243 disengages from the connecting hole 2411, thus connecting the condenser 21 to the cooling pipe 22.

[0056] It should also be noted that this application does not limit the material of the counterweight 245, and it can be a metal block or other counterweight material, including but not limited to alloy blocks, concrete blocks, etc.

[0057] See Figures 2 to 7The connecting hole 2411 is a conical hole with a circular cross-section, and its diameter gradually increases from the flow-facing side of the baffle 241 towards the flow-reverse side. The connecting block 243 is a conical block with a circular cross-section, and its diameter gradually increases from the flow-facing side of the baffle 241 towards the flow-reverse side. When the connecting block 243 rotates to the first position under the action of the cover plate 242, it can be inserted into the connecting hole 2411 and block it, thereby cutting off the connection between the return pipe 231 and the distributor pipe 232, thus disconnecting the passage between the condenser 21 and the cooling pipe 22. When the connecting block 243 moves from the first position to the second position, it gradually disengages from the connecting hole 2411 and forms a flow gap with it, thus connecting the condenser 21 and the cooling pipe 22.

[0058] The backflow side refers to, for example, Figures 2 to 7 The side shown with the cover plate, the frontal side refers to, for example, the side with the flow plate. Figures 2 to 7 The opposite side to the backflow side is shown.

[0059] Of course, the shapes of the connecting hole 2411 and the connecting block 243 are not fixed in this application, and those skilled in the art can adjust them as needed. For example, the cross-sectional shape of the connecting hole 2411 can also be a quadrilateral or other polygonal structure, in which case the cross-sectional shape of the connecting block 243 is a corresponding polygonal structure that matches the connecting hole. Wherein, when the cross-sectional shape of the connecting hole 2411 is a quadrilateral or other polygonal structure, the radial dimension of the connecting hole 2411 gradually increases from the flow-facing side of the baffle 241 to the flow-reverse side, and correspondingly, the radial dimension of the connecting block 243 gradually increases from the flow-facing side of the baffle 241 to the flow-reverse side.

[0060] See Figure 1 The counterweight 245 is spherical, with an outer diameter larger than the inner diameter of the connecting hole 2411 located on the flow-facing side. This causes mechanical interference between the counterweight 245 and the connecting hole 2411, effectively preventing the counterweight 245 from disengaging from the connecting hole 2411 when the baffle 241 rotates from the first position to the second position under the pressure of the cooling medium. The position where the counterweight 245 forms mechanical interference with the connecting hole is the second position, which is the position where the cover plate 242 reaches its maximum opening angle relative to the baffle 241.

[0061] It should be noted that when the structural parameters of the throttling component 24 (such as the tilt angle of the baffle 241, the size of the counterweight 245, etc.) are different, the pressure difference generated by the inlet and outlet cooling media, i.e., the pressure drop amplitude, will be different. Therefore, by adjusting the structural parameters of the throttling component 24, the adaptability of the throttling component 24 in this application can be strengthened, making the throttling component 24 more adaptable and able to match different types of cooling media, thereby ensuring efficient cooling of the rotor 1 by the evaporative cooling device 2.

[0062] Of course, the shape of the counterweight 245 is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the counterweight can also be columnar, cuboid, etc., as long as the maximum radial dimension of the counterweight 245 is greater than the maximum radial dimension on the flow-facing side of the connecting hole, so as to prevent the counterweight 245 from detaching from the connecting hole 2411.

[0063] Combination Figures 1 to 7 The working process of the evaporative cooling device 2 used in the generator rotor 1 of this application is described.

[0064] When rotor 1 is operating, the heat generated by the energized magnetic pole coil 142 is conducted to the cooling pipe 22, causing the cooling medium within the cooling pipe 22 to absorb heat and vaporize. Under the radial pressure difference generated by the rotation of rotor 1, the vaporized medium flows into the condenser 21 through the gas collecting pipe 25 to complete liquefaction. The condensed cooling medium flows to the throttling component 24 through the return liquid pipe 231, where the pressure is reduced. The depressurized cooling medium then flows into each cooling pipe 22 through the liquid distribution pipe 232, thus completing one cycle. The entire cooling cycle is repeated continuously, ensuring not only the stable operation of the magnetic pole coil 142 but also improving the reliability of motor operation. It should be noted that the above cycle continues until the rotor 1 completely stops rotating.

[0065] During the rotation of rotor 1, centrifugal force creates a pressure difference between the inlet and outlet cooling media of the throttling assembly 24, causing the cover plate 242 to rotate from the first position to the second position. This causes the cover plate 242 to form an angle with the baffle 241, which in turn causes the connecting block 243 to disengage from the connecting hole 2411, creating a flow gap and connecting the cooling pipe 22 with the condenser 21. As the rotational acceleration increases, this angle decreases, causing the flow gap to contract accordingly. This significantly increases the pressure difference flowing through the throttling assembly 24, increasing the pressure difference of the cooling medium before and after passing through the throttling assembly 24, and consequently significantly reducing the pressure of the cooling medium.

[0066] After rotor 1 completely stops rotating, the cover plate 242 automatically resets to the first position due to the gravity pressure difference generated by the liquid level difference between cooling pipe 22 and return pipe 23. At this time, connecting block 243 blocks connecting hole 2411 to form a mechanical seal, cutting off the passage between cooling pipe and condenser, thereby effectively preventing the backflow of cooling medium.

[0067] The radial direction of the radial pressure difference generated by the rotation of rotor 1 differs from the radial direction involved in other parts of this application. The radial direction of the radial pressure difference generated by the rotation of rotor 1 refers to, for example, the radial direction of the radial pressure difference generated by the rotation of rotor 1. Figure 1 The radial extension direction shown is perpendicular to the AA direction, while the radial direction of other parts in this application refers to the radial extension direction perpendicular to the central axis of the return pipe.

[0068] In addition, this application also provides a generator, which includes the evaporative cooling device described in the above embodiments.

[0069] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0070] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. An evaporative cooling device for a generator rotor, characterized in that, The evaporative cooling device (2) includes: The condenser (21), cooling pipe (22) and return pipe (23) are arranged in sequence according to the flow path of the cooling medium. A throttling assembly (24) is disposed within a return pipe (23) and is configured to prevent the backflow of the cooling medium while reducing the pressure of the cooling medium.

2. The evaporative cooling apparatus according to claim 1, characterized in that, The throttling component (24) includes: Baffle (241) is provided inside the return pipe (23) and has a connecting hole (2411) that allows the condenser (21) and the cooling pipe (22) to form a passage. A cover plate (242) is rotatably disposed on the back flow side of the baffle (241) and is configured to rotate between a first position and a second position so that the passage between the condenser (21) and the cooling pipe (22) is connected or disconnected.

3. The evaporative cooling apparatus according to claim 2, characterized in that, The throttling assembly (24) further includes a connecting block (243), which is disposed on the side of the cover plate (242) near the baffle (241); When the cover plate (242) is rotated to the first position, the connecting block (243) blocks the connecting hole (2411) so that the passage between the condenser (21) and the cooling pipe (22) is disconnected; When the cover plate (242) rotates from the first position to the second position, the connecting block (243) disengages from the connecting hole (2411) so that the condenser (21) is connected to the passage of the cooling pipe (22).

4. The evaporative cooling apparatus according to claim 3, characterized in that, The throttling assembly (24) also includes a connecting rod (244) and a counterweight (245). One end of the connecting rod (244) is connected to the side of the connecting block (243) away from the cover plate (242), and the other end passes through the connecting hole (2411) and is provided with the counterweight (245).

5. The evaporative cooling apparatus according to claim 4, characterized in that, The connecting rod (244) is made of either a rigid or flexible material.

6. The evaporative cooling apparatus according to claim 3, characterized in that, The connecting hole (2411) is a tapered hole, and the radial dimension of the connecting hole (2411) gradually increases from the front side of the baffle (241) to the back side. The radial dimension of the connecting block (243) gradually increases from the front side of the baffle (241) towards the back side.

7. The evaporative cooling apparatus according to claim 4, characterized in that, The maximum radial dimension of the counterweight (245) is greater than the maximum radial dimension on the upstream side of the connecting hole (2411).

8. The evaporative cooling apparatus according to claim 2, characterized in that, The baffle (241) is inclinedly disposed inside the return pipe fitting (23); or The baffle (241) is radially disposed inside the return pipe (23).

9. The evaporative cooling apparatus according to claim 1, characterized in that, The return pipe fitting (23) includes a return pipe (231) and a distribution pipe (232). One end of the distribution pipe (232) is connected to the cooling pipe (22), and the other end is connected to the return pipe (231). The throttling component (24) is provided inside the return pipe (231).

10. A generator, characterized in that, The generator includes the evaporative cooling device as described in any one of claims 1-9.

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