Oil leakage prevention type ventilation cap

Abstract

The utility model particularly discloses an oil leakage prevention type ventilation cap which comprises a column body, external threads are arranged at the bottom end of the column body, the interior of the column body is of a through hole structure, a filter element is arranged in the through hole structure, and a top cover is arranged at the top of the column body. The filter element made of the super-strong oleophylic and hydrophobic materials is installed in the lubricating oil filter, residual oil mist can be effectively adsorbed, meanwhile, water vapor in air can be prevented from permeating, and the service life of lubricating oil is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a speed reducer related technical field especially, it relates to an oil leakage prevention type breather cap. BACKGROUND

[0002] The yaw system of the wind turbine is one of the core components of the wind turbine, and its function is to make the blades of the wind turbine always face the wind source, so as to maximize the capture of wind energy and improve the power generation efficiency. The yaw reducer mainly undertakes the task of reducing the gyroscopic force generated during yawing, so that the wind turbine can yaw more stably and efficiently, and also helps to reduce wear and tear and prolong the service life of the equipment. During the operation of the reducer, friction and heat are generated inside, resulting in a large amount of hot gas. The breather cap set at the top can make the hot gas exhaust, achieving the effect of consistent pressure inside and outside the reducer. However, in actual application, the lubricating oil forms a splashing phenomenon under the action of centrifugal force, and high-temperature oil mist is generated. The ordinary breather cap has small barrier effect on the lubricating oil, and the height is almost flush with the reducer box, so it is easy to cause lubricating oil leakage, resulting in problems such as waste of lubricating oil, environmental pollution and the like. At the same time, a small amount of water vapor in the air can penetrate into the gearbox through the breather cap, causing the lubricating oil in the gearbox to be contaminated. SUMMARY

[0003] In order to improve the problems of lubricating oil leakage, waste of lubricating oil, environmental pollution and the like caused by the existing breather cap, and the problem that a small amount of water vapor in the air can penetrate into the gearbox through the breather cap, the utility model provides an oil leakage prevention type breather cap.

[0004] The oil leakage prevention type breather cap provided by the utility model adopts the following technical scheme:

[0005] An oil leakage prevention type breather cap, comprising a column body, an outer thread is arranged at the bottom end of the column body, the inside of the column body is a through-hole structure, a filter element is arranged inside the through-hole structure, and a top cover is arranged at the top of the column body.

[0006] Further, the through-hole structure comprises a first hole channel and a second hole channel, the first hole channel is located at the lower end, the inner diameter of the second hole channel is larger than that of the first hole channel, a baffle is arranged at the bottom end of the second hole channel, the top of the baffle is fixedly connected with an extension rod, and a porous baffle is arranged at the top of the extension rod.

[0007] Further, the filter element is arranged at the top of the porous baffle, and the filter element is made of oleophilic and hydrophobic material.

[0008] Further, the oleophilic and hydrophobic material is one or more of polypropylene fiber, alkyl ethylene polymer fiber, long-chain alkyl methacrylate, expanded graphite, wood pulp cellulose and cross-linked polymer of alkyl methacrylate.

[0009] Furthermore, the diameter of the baffle is larger than the diameter of the first channel and smaller than the diameter of the second channel.

[0010] Furthermore, a spring is provided around the periphery of the telescopic rod.

[0011] Furthermore, there is a certain quantitative relationship between the external thread height D1 and the first channel height D2, where D2≥3.5D1.

[0012] Furthermore, the top cover has multiple air holes at its center.

[0013] Furthermore, the top cover is disposed on the top of the filter element, and the top cover is connected to the column by bolts.

[0014] Furthermore, a groove is provided on the top periphery of the external thread of the cylinder.

[0015] In summary, this utility model has at least one of the following beneficial technical effects:

[0016] 1. This leak-proof vent cap has a high column height, providing a large space to accommodate or guide splashed lubricating oil.

[0017] 2. This leak-proof and breathable cap has an internal device consisting of a baffle and a spring. Hot air is pushed open by the pressure difference and discharged. Some of the high-temperature oil mist condenses after contacting the baffle and then flows back into the housing.

[0018] 3. This leak-proof and breathable cap is equipped with a filter element made of super oleophilic and hydrophobic materials, which can effectively adsorb the remaining oil mist and prevent the penetration of water vapor in the air, thus effectively extending the life of the lubricating oil. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 3 This is a top view of an embodiment of the present utility model.

[0022] Reference numerals: 1. Column; 2. External thread; 3. First channel; 4. Baffle; 5. Spring; 6. Telescopic rod; 7. Bolt; 8. Top cover; 9. Filter element; 10. Perforated baffle; 11. Second channel; D1 is the height of the external thread; D2 is the height of the first channel of the vent cap. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 1-3 The present invention will be described in further detail below.

[0024] This utility model discloses an oil-leak-proof and breathable cap. For example... Figure 1 The oil-proof vent cap includes a column 1, with an external thread 2 at the bottom of the column 1. The vent cap is assembled with the reducer housing through the external thread 2. The inside of the column 1 is a through-hole structure, and a filter element 9 is installed inside the through-hole structure. A top cover 8 is installed on the top of the column 1.

[0025] like Figure 1 The through-hole structure includes a first channel 3 and a second channel 11. The first channel 3 is located at the lower end, and the inner diameter of the second channel 11 is larger than that of the first channel 3. A baffle 4 is provided at the bottom end of the second channel 11, and a telescopic rod 6 is fixedly connected to the top of the baffle 4. A spring 5 is provided around the periphery of the telescopic rod 6, and a porous baffle 10 is provided at the top of the telescopic rod 6. The diameter of the baffle 4 is larger than the diameter of the first channel 3 but smaller than the diameter of the second channel 11. A filter element 9 is disposed on the top of the porous baffle 10, and the filter element material is an oleophilic and hydrophobic material.

[0026] Baffle 4, spring 5, telescopic rod 6, and perforated baffle 10 form a telescopic mechanism. Baffle 4, as the main control element, opens and closes according to changes in the pressure difference between the inside and outside of the gearbox. Spring 5 provides the power for baffle 4 to reset, ensuring that baffle 4 automatically closes when the internal and external pressures are balanced. Telescopic rod 6 assists baffle 4 in smooth movement, preventing impacts or noise caused by rapid movement. Hot air pushes baffle 4 open due to the pressure difference, causing spring 5 and telescopic rod 6 to contract, allowing the hot air to escape smoothly from the gearbox, thus achieving pressure uniformity between the inside and outside. The delay in the opening of baffle 4 provides an opportunity for high-temperature oil mist to contact and condense on the baffle, further increasing the efficiency of lubricating oil return. The design of perforated baffle 10 not only helps in the uniform discharge of hot air but also increases the contact area between oil mist and cold air through the holes, promoting condensation.

[0027] Furthermore, the oleophilic and hydrophobic material is one or more of the following: polypropylene fiber, alkyl ethylene polymer fiber, long-chain alkyl methacrylate, expanded graphite, and cross-linked polymers of wood pulp cellulose and alkyl methacrylate. The filter element 9 of the vent cap is made of an oleophilic and hydrophobic material. Residual high-temperature oil mist, upon contact with filter element 9, is quickly adsorbed and condensed into liquid oil, flowing back into the chamber, further ensuring that the lubricating oil does not overflow. In addition, filter element 9 has superhydrophobic properties, effectively intercepting moisture in the air and preventing it from reacting with the lubricating oil in the chamber, ensuring the purity and service life of the lubricating oil.

[0028] like Figure 1 The external thread height D1 and the first channel height D2 have a certain quantitative relationship, D2≥3.5D1. A larger inner cavity can provide a buffer zone, allowing splashed lubricating oil to slow down, condense, and flow back to the housing before impacting the baffle 4 of the vent cap.

[0029] like Figure 2 ,Figure 3 The top cover 8 is located on top of the filter element 9 and is connected to the column 1 by bolts 7. The top cover 8 has multiple air holes in its center. The gas generated by the reducer pushes open the baffle 4 through the first channel 3, passes through the perforated baffle 10 and the filter element 9, and is discharged from the air holes of the top cover 8.

[0030] like Figure 1 , Figure 2 The top circumference of the external thread 2 of the cylinder is provided with a groove to facilitate the installation of the sealing ring, ensure the airtightness between the vent cap and the box, and prevent oil leakage from the connection.

[0031] The implementation principle of the leak-proof vent cap of this utility model is as follows: During operation, the reducer will generate lubricating oil splashes and a high-temperature oil-gas mixture. The leak-proof vent cap is installed on the reducer housing via an external thread 2. Due to the high height of the first channel 3 inside the column 1, most of the splashed lubricating oil will not reach the baffle 4 and will flow back into the reducer housing along the channel 1. The high-temperature oil-gas mixture will reach the baffle 4 along the first channel 3. Due to the pressure difference between the inside and outside of the reducer housing, the high-temperature oil-gas mixture will push the baffle 4 open along the first channel 3. The spring 5 and the telescopic rod 6 will then contract, and the baffle 4 will slide upward along the second channel 11 of the column 1. This process takes a certain amount of time. When the high-temperature oil-gas comes into contact with the baffle 4 and the porous baffle 9, condensation will occur, forming oil droplets that flow into the housing along the channel of the column 1. Hot air and residual oil mist will evenly enter the interior of filter element 9 through the pores of porous baffle 10. Since filter element 9 is made of an oleophilic and hydrophobic material, it will absorb the residual oil mist. The absorbed lubricating oil will aggregate into large droplets and flow back into the housing along the pores. Hot air will pass through the gaps in filter element 9 and be discharged outside the housing through the vent at the top of the vent cap 8. Furthermore, the inherent properties of filter element 9 can effectively prevent moisture in the air from entering the housing, preventing a chemical reaction between the lubricating oil and water. This vent cap, through its triple design, completely prevents lubricating oil leakage, thereby reducing the frequency and cost of gearbox maintenance.

[0032] This utility model has a filter element made of a super oleophilic and hydrophobic material installed inside, which can effectively adsorb the remaining oil mist and prevent the penetration of water vapor in the air, thus effectively extending the life of the lubricating oil.

[0033] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A leak-proof and breathable cap, characterized in that, The device includes a column, the bottom of which is provided with an external thread, the interior of which has a through-hole structure, a filter element is provided inside the through-hole structure, and a top cover is provided on the top of the column.

2. The leak-proof and breathable cap according to claim 1, characterized in that: The through-hole structure includes a first channel and a second channel. The first channel is located at the lower end, and the inner diameter of the second channel is larger than that of the first channel. A baffle is provided at the bottom end of the second channel, and a telescopic rod is fixedly connected to the top of the baffle. A multi-hole baffle is provided at the top of the telescopic rod.

3. The leak-proof breathable cap according to claim 2, characterized in that: The filter element is disposed on the top of the porous baffle, and the filter element material is an oleophilic and hydrophobic material.

4. The leak-proof breathable cap according to claim 3, characterized in that: The oleophilic and hydrophobic material is one or more of the following: polypropylene fiber, alkyl ethylene polymer fiber, long-chain alkyl methacrylate, expanded graphite, and cross-linked polymers of wood pulp cellulose and alkyl methacrylate.

5. The leak-proof breathable cap according to claim 4, characterized in that: The diameter of the baffle is larger than the diameter of the first channel and smaller than the diameter of the second channel.

6. The leak-proof breathable cap according to claim 5, characterized in that: Springs are provided around the periphery of the telescopic rod.

7. The leak-proof breathable cap according to claim 6, characterized in that: There is a certain quantitative relationship between the external thread height D1 and the first channel height D2, where D2≥3.5D1.

8. The leak-proof breathable cap according to claim 7, characterized in that: The top cover has multiple air holes at its center.

9. The leak-proof breathable cap according to claim 8, characterized in that: The top cover is located on top of the filter element and is connected to the column by bolts.

10. The leak-proof and breathable cap according to claim 1, characterized in that: The external thread of the cylinder has a groove on its top periphery.

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