A device for preventing oil from being thrown off by a hydroelectric generating set

Abstract

This application discloses an oil spill prevention device for hydroelectric generator sets, which is installed circumferentially on the rotating part of the guide bearing body of the hydroelectric generator set. It includes an oil trough, an elevated oil trough sealing cover, and an oil baffle cylinder. The oil trough completes one full rotation around the rotating part of the guide bearing body. The elevated oil trough sealing cover is located at the top of the oil trough and near the thrust head, with a raised top height. An adaptive oil baffle is provided at one end near the outer edge of the thrust head, with a gap between the adaptive oil baffle and the outer edge of the thrust head, forming a semi-contact fit. The oil baffle cylinder is installed on the side of the oil trough near the rotating part of the guide bearing body, located in the gap between the thrust head and the main shaft, and has an oil-blocking labyrinth component at its end. This application, through the cooperation between the elevated oil trough sealing cover, the oil baffle cylinder, and the guide bearing body, increases the volume of the oil trough, improves the space for oil mist condensation, and also prevents oil mist from overflowing on one side of the shaft, making it more difficult for oil droplets to be thrown out, thus avoiding waste and pollution.

Description

Technical Field

[0001] This application relates to the field of hydroelectric generator equipment technology, and in particular to a hydroelectric generator anti-oil-slinging device. Background Technology

[0002] Hydroelectric generator set guide bearing systems generally employ oil groove lubrication structures. When rotating components (such as the main shaft and thrust head) rotate at high speed, they cause the adhering lubricating oil to rotate, generating strong centrifugal force. This results in some lubricating oil splashing, forming oil droplets and oil mist. Traditional anti-oil-slinging solutions mainly rely on two types of sealing structures: non-contact seals and contact seals. Non-contact seals (such as labyrinth seals and gap seals) rely on the dissipation of kinetic energy of the fluid in the micro-gap to reduce leakage, but they cannot completely prevent lubricating oil from "climbing" along the shaft surface and oil mist from escaping. Contact seals (such as felt seals and composite material seals), while enhancing the sealing effect through clamping force, are prone to increased clearance due to friction and wear over long-term operation, and cannot adapt to the dynamic swing of the main shaft, potentially leading to "wear-induced leakage."

[0003] The core challenge lies in the conflict between the oil tank structure and operating conditions: excessively high oil levels can cause oil splashing due to centrifugal force, while excessively low levels affect lubrication and increase the risk of bearing wear. During unit operation, the lubricating oil exhibits a "climbing" phenomenon due to the rotating components, with higher levels on the outside and lower levels on the inside. Oil mist accumulates in the oil baffle area, resulting in oil splashing.

[0004] If a hydroelectric generator unit experiences severe oil spillage over a long period, the lubricating oil will frequently rise and overflow from the upper oil groove, the outer surface of the journal of the lower guide bearing, and the outer wall of the oil baffle. In addition to wasting lubricating oil, the spilled oil combines with dust in the air to form oil sludge that accumulates on the generator's stator and rotor coils, causing serious pollution to the generator's operating environment. The oil sludge also accelerates the damage to the coil insulation, easily leading to grounding faults, affecting the heat dissipation of the stator and rotor coils and the lifespan of various components, threatening the safe operation of the generator unit, and may even cause corresponding economic losses. Utility Model Content

[0005] The main purpose of this application is to provide a device to prevent oil spillage from hydropower units, which aims to solve the problem that lubricating oil in existing hydropower units is easily spilled out of the oil trough during operation.

[0006] To achieve the above objectives, this application proposes a hydro-generator anti-oil-slinging device. The device is installed circumferentially on the rotating part of the guide bearing housing of the hydro-generator. The rotating part of the guide bearing housing includes a main shaft, a thrust head, and a mirror plate. The hydro-generator anti-oil-slinging device includes: An oil trough, wherein the oil trough is configured to complete one revolution around the rotating portion of the guide bearing body; An elevated oil tank sealing cover is set at the top of the oil tank and close to the thrust head. Its top height is higher than the upper end surface of the oil tank. An adaptive oil baffle is provided at one end near the outer edge of the thrust head. There is a gap between the adaptive oil baffle and the outer edge of the thrust head, forming a semi-contact fit. An oil baffle is installed on the side of the oil groove near the rotating part of the guide bearing body and located in the gap between the thrust head and the main shaft, with an oil baffle labyrinth component at its end.

[0007] For example, in at least one embodiment of the hydroelectric generator anti-oil-slinging device provided in this application, the adaptive oil-blocking component includes an upper pressure cap, a positioning pin, an oil-blocking ring, a sealing ring, and a spring pin; wherein, The upper pressure cap is fixed to the end of the raised oil tank sealing cover, is equipped with the positioning pin, and forms an installation space with the end structure of the raised oil tank sealing cover for the installation of the oil baffle ring. The oil baffle ring is installed in the mounting space by the spring pin. The oil baffle ring is also pressed into the mounting space by the sealing ring and restricted from coming out of the mounting space by the positioning pin.

[0008] For example, in at least one embodiment of the present application, the adaptive oil-blocking component is arranged in a circumferential ring along the rotating portion of the guide bearing body of the turbine generator set.

[0009] For example, in at least one embodiment of the hydroelectric generator anti-oil-slinging device provided in this application, the oil baffle ring is made of polyimide, and the gap between the oil baffle ring and the outer edge of the thrust head is 0.05mm–0.15mm.

[0010] For example, in at least one embodiment of the present application, the top of the oil tank is also provided with a breather to balance the pressure difference between the inside and outside of the oil tank.

[0011] For example, in at least one embodiment of the hydroelectric generator anti-oil-slinging device provided in this application, the breather includes a housing, multiple layers of baffles, and a filter screen; wherein, The multi-layered baffles are arranged in a labyrinthine pattern within the casing to form a meandering flow channel. The filter grid is located at the end of the meandering flow channel and is used to filter the air in the oil tank.

[0012] For example, in at least one embodiment of the present application, the water turbine anti-oil-slinging device further includes an oil drain pipe with an oil seal bend, which connects the beginning and end of the meandering flow channel and is used to collect the end oil droplets into the oil tank.

[0013] For example, in at least one embodiment of the present application, the oil-blocking labyrinth component is a multi-stage stepped bidirectional labyrinth structure, including at least one opening disposed radially and axially relative to the main shaft.

[0014] For example, in at least one embodiment of the present application, the oil tank is further provided with a cooler, which includes a conduit for introducing coolant for liquid cooling.

[0015] Compared with existing oil tank structures or anti-oil-slinging designs, the anti-oil-slinging device of this application has at least the following beneficial effects: by increasing the oil tank volume through the heightened oil tank sealing cover, the space for oil mist condensation is increased. Combined with the self-adaptive oil baffle at its end and the semi-contact sealing structure formed by the thrust head, the dynamic gap adjustment capability of the sealing cover is realized. While blocking oil film climbing (the gap is less than the oil film thickness), it adapts to the spindle swing, solving the contradiction of "wear and leakage" in traditional seals. An oil-baffle labyrinth component is set at the end of the oil baffle cylinder to consume the centrifugal oil flow energy, eliminate the "pump effect" of a single-layer oil baffle cylinder, and avoid oil slinging on one side of the shaft. In addition, the anti-oil-slinging device also achieves system protection of the oil tank structure at the location where oil slinging may occur during operation by linking with the main shaft, mirror plate, thrust head, thrust bearing, and bearing of the hydro-generator unit. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram (cross section) of an embodiment of the anti-oil-slinging device for hydroelectric generators in this application. Figure 2 This is a schematic diagram of the structure of an embodiment of the adaptive oil baffle of this application; Figure 3 This is a schematic diagram of the structure of an embodiment of the oil-blocking labyrinth component of this application; Figure 4 for Figure 1 Enlarged schematic diagram of a respirator; Reference numerals: 1. Main shaft; 2. Thrust head; 3. Thrust bearing; 4. Bearing bush; 5. Mirror plate; 6. Oil groove; 7. Raised oil groove sealing cover; 8. Oil baffle; 9. Self-adaptive oil baffle; 91. Upper pressure cover; 92. Positioning pin; 93. Oil baffle ring; 94. Sealing ring; 95. Spring pin; 10. Oil baffle labyrinth component; 11. Breather; 111. Housing; 112. Multi-layer baffle; 113. Filter screen; 114. Oil drain pipe with oil seal bend; 12. Cooler; The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This application provides an oil-throwing prevention device for a hydro-generator unit. The hydro-generator unit is located circumferentially around the rotating part of the guide bearing body. The rotating part of the guide bearing body includes a main shaft, a thrust head, and a mirror plate. The oil-throwing prevention device includes an oil trough, an elevated oil trough sealing cover, and an oil baffle cylinder. The oil trough is arranged to complete one revolution around the rotating part of the guide bearing body. The elevated oil trough sealing cover is located at the top of the oil trough and close to the thrust head. Its top height is higher than the upper end surface of the oil trough. An adaptive oil baffle is provided at one end near the outer edge of the thrust head. There is a gap between the adaptive oil baffle and the outer edge of the thrust head, forming a semi-contact fit. The oil baffle cylinder is installed on the side of the oil trough near the rotating part of the guide bearing body and located in the gap between the thrust head and the main shaft. An oil-baffle labyrinth is provided at its end.

[0023] Specifically, see Figure 1 This application describes an embodiment of the anti-oil-throwing device for a hydro-generator unit. The device is installed on the guide bearing of the hydro-generator unit. The main components of the hydro-generator unit at the installation location include the main shaft 1, thrust head 2, thrust bearing 3, and bearing 4. The thrust head 2, fixed to the main shaft 1, is the core component of the rotating part of the guide bearing body. Its outer surface contacts the bearing 4 and rotates with the main shaft 1. The bearing 4 is arranged around the outer edge of the thrust head 2, with direct contact between the bearing 4 and the outer edge of the thrust head 2. However, in actual operation, a thin oil film, i.e., an oil film gap, is formed between them. This gap is typically formed by several fan-shaped guide bearings 4, which can bear radial force and provide lubrication. The thrust bearing 3 is the core load-bearing component of the thrust bearing of the hydro-generator unit. It bears the weight of the entire rotating part of the unit and the water thrust of the turbine runner, and forms a hydrodynamic lubrication film with the mirror plate 5. When the mirror plate 5 rotates with the main shaft 1 (thrust head 2), it will bring lubricating oil into the gap between the mirror plate 5 and the thrust bearing 3 to form a high-pressure oil film, thus achieving non-contact bearing.

[0024] The anti-oil-slinging device for hydroelectric generators includes an oil tank 6, an elevated oil tank sealing cover 7, and an oil baffle 8, combined with... Figure 1 The oil groove 6 is set to completely surround the main shaft 1 and the thrust head 2. Figure 1 (Only the structure on one side of the main shaft is shown). The thrust head 2, thrust bearing 3, and bearing 4 of the hydroelectric generator are respectively arranged in coordination with the oil tank 6 structure. For example, the thrust bearing 3 is installed on the oil tank 6 (bottom), and a mirror plate 5 is fixed on the thrust head 2, which acts on the thrust bearing 3 through the mirror plate 5; the bearing 4 is installed and fixed on the oil tank 6 (such as below the raised oil tank sealing cover 7), and is in a wrapping contact with the outer edge of the thrust head 2. Among them, see Figure 1 The raised oil tank sealing cover 7 is fixed at one end to the top of the oil tank 6, and the other end extends radially along the oil tank 6 and approaches the thrust head 2, with a stepped top height. This increased top height increases the axial space of the oil tank 6 near the thrust head 2—that is, the inner space. When oil mist "climbs" within the oil tank 6 under centrifugal force, there is a larger space for oil mist condensation, allowing the oil mist to fully condense and accumulate, preventing it from escaping from the structure of the oil tank 6. It can be understood that the increased top height can also be achieved in other forms such as arcs or multi-step structures, as long as the basic sealing function and the space increase effect are achieved.

[0025] In the above embodiment, an adaptive oil baffle 9 is provided at one end of the oil sump 6 near the outer circumferential edge of the thrust head 2. The outer circumferential edge of the thrust head 2 is usually sealed to the oil sump 6 through a contact seal or a semi-contact seal. The adaptive oil baffle 9 used in this embodiment is a semi-contact seal. Structurally, it has a gap between itself and the outer circumferential edge of the thrust head 2, and can autonomously adapt to the slight axial displacement or vibration that the thrust head 2 may generate during operation to reduce friction and wear. Specifically, one implementation of the adaptive oil baffle 9 is as follows: Figure 2As shown, the adaptive oil baffle 9 includes an upper pressure cover 91, a positioning pin 92, an oil baffle ring 93, a sealing ring 94, and a spring pin 95. The upper pressure cover 91 is fixed to the end of the raised oil sump sealing cover 7 by bolts or other means, and the positioning pin 92 is arranged vertically at the end of the upper pressure cover 91. The upper pressure cover 91 and the end structure (the part with the right angle notch) of the raised oil sump sealing cover 7 form an installation space. The oil baffle ring 93 (completely around the thrust head 2) is installed in this installation space by the spring pin 95, and is pressed in the installation space by the sealing ring 94 installed on the upper and lower sides of the oil baffle ring 93. At the same time, the oil baffle ring 93 has a limiting groove, which cooperates with the positioning pin 92. The positioning pin 92 is located in the limiting groove, which can prevent the oil baffle ring 93 from falling out of its installation space. When the hydro-generator unit is running, the thrust head 2 rotates with the main shaft 1, which inevitably produces a slight axial sway. The oil baffle ring 93 can be radially offset by the spring pin 95 after the thrust head 2 produces the sway, so as to adapt to the action of the thrust head 2 under the operating conditions with elastic and flexible radial movement, thereby reducing the sealing failure problem that may be caused by wear.

[0026] Preferably, the adaptive oil baffle 9 can be set in three, four or more at an even angle on the inner circumference of the raised sealing cover to ensure its working stability; or the oil baffle ring 93 can be kept flexible by multiple spring pins 95 and symmetrical positioning pins 92 to achieve the sealing of the adaptive thrust head 2.

[0027] Preferably, the oil baffle ring 93 is made of polyimide, and the gap between the oil baffle ring 93 and the outer edge of the thrust head 2 is 0.05mm–0.15mm. Polyimide has good wear resistance, a low coefficient of friction, excellent self-lubricating properties, and stable performance in high-temperature oil mist environments, which can effectively avoid sealing failure caused by material aging; the gap value of 0.05mm-0.15mm is close to the boundary layer thickness of fluid dynamics at the physical level, which can maximize the use of oil film tension to form a seal; in terms of materials, the combination with polyimide, a material with a low coefficient of thermal expansion, can maintain a stable sealing effect even when the equipment operating temperature changes.

[0028] In the above embodiments, the raised sealing cap and the adaptive oil baffle ring 93 can prevent oil mist from being thrown out at the top of the oil tank 6, and the side walls of the oil tank 6 are usually set in the form of oil baffles 8. Figure 1In the gap between the thrust head 2 and the main shaft 1, the oil groove 6 can achieve better lubrication in the working state. The existing oil groove's oil baffle is designed as a single-layer inner oil baffle, which is suitable for medium and low speed units. In this embodiment, by designing an oil baffle 8 on the side of the oil surface of the oil groove 6 and setting an oil baffle labyrinth 10 at the end, the pumping effect caused by the impact of the existing single-layer inner oil baffle 8 in the oil can be eliminated. The oil baffle labyrinth 10 also forms a vortex-blocking device between the thrust head 2 and the oil baffle 8, reducing the Reynolds number of the oil flow in this area, weakening turbulence, and preventing the lubricating oil in the oil groove 6 from overflowing from the inner layer of the oil baffle 8 along the main shaft. If possible, oil return holes can also be evenly distributed in the circumferential direction of the oil baffle 8 to ensure that the oil flow between layers flows smoothly back to the oil groove 6.

[0029] In particular, in some embodiments, the oil-blocking labyrinth member 10 is a multi-stage stepped two-way labyrinth structure, including at least one opening disposed radially and axially relative to the main shaft 1, respectively. For example, see... Figure 3 With the axial and radial directions of the main shaft 1 as reference, the oil baffle labyrinth component 10 is configured to have two notches in the radial direction and one notch in the axial direction. The radial and axial grooves synchronously cut the tangential oil flow and the axial climbing oil film, which alleviates the pumping effect of the single-layer oil baffle 8, forces the oil flow / oil mist to repeatedly change its direction of motion and even form eddies, consume kinetic energy and condense and fall back.

[0030] It is understandable that there is no limit to the number of multi-level, stepped, two-way maze structures that can be used in combination. They can be designed according to actual needs. At least one can be set in the axial and one in the radial directions to achieve the corresponding functions and effects.

[0031] The anti-oil-slinging device of the hydro-generator unit in the above embodiment expands the internal volume of the oil tank 6 by increasing the height of the oil tank sealing cover 7, thereby increasing the space for oil mist condensation. Combined with the semi-contact sealing structure formed by the adaptive oil baffle 9 at its end and the thrust head 2, it realizes the dynamic gap adjustment capability of the sealing cover. While blocking the oil film from climbing, it adapts to the swing of the main shaft 1 (thrust head 2), solving the wear and leakage problems existing in the traditional sealing structure. An oil baffle labyrinth component 10 is set at the end of the oil baffle cylinder 8 to consume the centrifugal oil flow energy, eliminate the pump effect of the single-layer oil baffle cylinder 8, and avoid oil slinging on one side of the shaft. In addition, the anti-oil-slinging device also realizes system protection of the oil tank structure at the position where oil slinging may occur during operation by linking with the main shaft 1, mirror plate 5, thrust head 2, thrust bearing 3, bearing 4 and other components of the hydro-generator unit.

[0032] In some embodiments of this application, a breather 11 is also provided on the top of the oil tank 6 to balance the pressure difference between the inside and outside of the oil tank 6. The anti-oil-slinging device balances the air pressure inside and outside the oil tank 6 through the breather 11, eliminating the phenomenon of oil mist overflowing due to positive pressure and generating oil mist spray; on the other hand, the breather complements the adaptive oil-blocking component 9: the oil-blocking ring 93 blocks the liquid oil flow, and the breather 11 solves the problem of gaseous oil mist escape, realizing oil / gas dual-phase sealing.

[0033] Specifically, such as Figure 4 As shown, in one embodiment of the respirator 11, it includes a housing 111, multi-layer baffles 112, and a filter grid 113. The multi-layer baffles 112 are longitudinally arranged in a labyrinthine pattern within the housing 111 to form a meandering flow channel. At the top of the housing 111, i.e., at the end of the meandering flow channel, a filter grid 113 is provided to filter the air within the oil tank 6. Oil mist in the oil tank 6 condenses into oil droplets as it passes through the meandering flow channel formed by the multi-layer baffles 112. The oil droplets flow back into the oil tank 6, while the air treated by the filter grid 113 is discharged from the oil tank 6, thus completing oil mist recovery and balancing the pressure difference between the inside and outside of the oil tank 6.

[0034] Additionally, the respirator 11 is also equipped with an oil drain pipe 114 with an oil seal bend, which connects the beginning and end of the meandering flow channel and can drain the accumulated oil on the top of the housing 111 back into the oil tank 6.

[0035] Preferably, in the above embodiments, the number of breathers 11 is adjusted according to the volume of the oil tank 6, the specifications of the generator set, etc., and multiple breathers are provided.

[0036] In some embodiments of this application, a cooler 12 is further provided inside the oil tank 6. The cooler 12 includes conduits for introducing coolant for liquid cooling. Figure 1 As shown, the oil tank 6 of the anti-oil-throw device of the hydro-generator unit is also equipped with a cooler 12. The cooler 12 can be arranged in a ring shape and connected to an external cooling source through a conduit to circulate coolant to absorb the oil temperature.

[0037] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A device for preventing oil flinging of a hydroelectric generating set, the device being arranged circumferentially on a rotating portion of a guide bearing body of the hydroelectric generating set, the rotating portion of the guide bearing body including a main shaft, a thrust head, and a mirror plate, characterized in that, include: An oil trough, wherein the oil trough is configured to complete one revolution around the rotating portion of the guide bearing body; An elevated oil tank sealing cover is set at the top of the oil tank and close to the thrust head. Its top height is higher than the upper end surface of the oil tank. An adaptive oil baffle is provided at one end near the outer edge of the thrust head. There is a gap between the adaptive oil baffle and the outer edge of the thrust head, forming a semi-contact fit. An oil baffle is installed on the side of the oil groove near the rotating part of the guide bearing body and located in the gap between the thrust head and the main shaft, with an oil baffle labyrinth component at its end.

2. The oil thrower prevention device for a hydroelectric generating unit according to claim 1, characterized by The adaptive oil baffle includes an upper pressure cap, a positioning pin, an oil baffle ring, a sealing ring, and a spring pin; wherein... The upper pressure cap is fixed to the end of the raised oil tank sealing cover, is equipped with the positioning pin, and forms an installation space with the end structure of the raised oil tank sealing cover for the installation of the oil baffle ring. The oil baffle ring is installed in the mounting space by the spring pin. The oil baffle ring is also pressed into the mounting space by the sealing ring and restricted from coming out of the mounting space by the positioning pin.

3. The oil throw-out prevention device for a hydroelectric generating unit according to claim 1, characterized by The adaptive oil baffle is arranged in a ring around the circumference of the rotating part of the guide bearing body of the hydro-generator unit.

4. The oil thrower prevention device for a hydroelectric generating unit according to claim 2, characterized by The oil baffle ring is made of polyimide, and the gap between the oil baffle ring and the outer edge of the thrust head is 0.05mm-0.15mm.

5. The oil thrower prevention device for a hydroelectric generating unit according to claim 1, characterized by A breather is also installed on the top of the oil tank to balance the pressure difference between the inside and outside of the oil tank.

6. The oil thrower prevention device for a hydroelectric generating unit according to claim 5, characterized by The respirator includes a shell, multiple baffles, and a filter grid; wherein... The multi-layered baffles are arranged in a labyrinthine pattern within the casing to form a meandering flow channel. The filter grid is located at the end of the meandering flow channel and is used to filter the air in the oil tank.

7. The oil thrower prevention device for a hydroelectric generating set according to claim 6, characterized by The breather also includes an oil drain pipe with an oil seal bend, which connects the beginning and end of the meandering flow channel and is used to collect the end oil droplets into the oil tank.

8. The oil thrower prevention device for a hydroelectric generating unit according to claim 1, characterized by The oil-blocking labyrinth component is a multi-stage stepped bidirectional labyrinth structure, including at least one opening disposed radially and axially relative to the main shaft, respectively.

9. The anti-oil-slinging device for hydroelectric generators according to claim 1, characterized in that, The oil tank is also equipped with a cooler, which includes a conduit for introducing coolant for liquid cooling.

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