Oil mist eliminating device for water guide bearing

Abstract

The utility model relates to the field of hydro-generators, and discloses a water guide bearing oil mist eliminating device which is integrally of a wrapping type structure, an upper flange, a vertical ring and a lower flange are formed in a welding mode, the upper flange, a flow stabilizing plate and an inner oil baffle ring are connected through bolts in a combined mode, and the lower flange is fixed on a bearing body through screws. The hardness of the inner oil baffle ring is far smaller than that of the main shaft, the main shaft cannot be damaged, the flow stabilizing plate and the vertical ring block the oil mist, on the premise that the main shaft is not damaged, the oil mist is prevented from splashing, the oil mist converges and slowly converges into oil in the oil tank, the visual field in the outer oil tank is clear, and the felt replacement frequency above the oil tank is reduced. The utility model has the advantages of simple structure, regular appearance and reduced maintenance cost, and can be widely applied to various units.

Description

Technical Field

[0001] The utility model belongs to the field of water turbines, and specifically relates to an oil mist elimination device for a water guide bearing. Background Art

[0002] In the field of water turbines, the rotation of the water guide bearing is used as the initial moving part of the water turbine to complete the pumping function. As the core high-speed rotating part of the water turbine, during the operation of the unit, the oil film between the high-speed rotation of the water guide bearing and the static load part water guide tile in contact will gradually heat up, causing some lubricating oil to vaporize and form oil mist. When the oil mist accumulates to a certain extent, it will overflow from the joint between the sealing part and the rotating part. The overflowing oil mist will directly impact the outer oil tank or disperse on the oil level surface, blocking the view of the observation window and causing the oil mist to overflow from the outer oil tank. To prevent the oil mist from overflowing from the oil tank and blocking the view caused by the above reasons, this utility model studies the design of such an oil mist elimination device to solve various problems. Summary of the Invention

[0003] The purpose of the utility model is to provide an oil mist elimination device for a water guide bearing, which can avoid or reduce the problems of oil mist splashing, blocking the view of the observation window, and oil mist overflowing from the outer oil tank during the high-speed rotation of the water guide bearing in the unit.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: an oil mist elimination device for a water guide bearing, including an upper oil tank, an oil baffle support, and a follower oil seal. The upper oil tank is divided into two parts, and is wrapped around the outside of the water guide bearing as a whole through flange surface bolts, fixed to the bearing body through bolts, and has a gap with the main shaft. A follower oil seal is arranged above the upper oil tank cover as a seal and is closely fitted with the main shaft. The follower oil seal is fixed to the upper oil tank cover through bolts, and a sealing ring is used to ensure the sealing performance. The double-layer seal is adopted at the position where it contacts and cooperates with the main shaft. The bearing body supports the water guide tile and separates the upper and lower oil tanks. A cooler is arranged in the lower oil tank to cool the hot oil. The gap between the water guide tile and the main shaft is matched by an oil film. The oil baffle support is arranged inside the upper oil tank, outside the water guide tile, and above the bearing body, and is bolted to the steady flow plate. An inner oil baffle is bolted to the steady flow plate. The inner oil baffle is in small clearance fit with the bearing to prevent the oil mist from being thrown out from the gap. The steady flow plate intercepts the oil in the vertical direction as the inner oil tank cover. The oil baffle support intercepts the splashing oil mist in the circumferential direction. Multiple radial oil discharge holes are arranged in the circumferential direction of the oil baffle support. The whole oil baffle support intercepts the oil mist during the splashing of the oil mist, converges the oil mist and makes it slide down along the oil baffle support, and makes the splashing oil mist slowly flow into the oil tank through the radial oil discharge holes.

[0005] The beneficial effects of the present utility model are as follows: The oil mist eliminator can effectively eliminate oil mist, prevent oil mist from splashing without damaging the main shaft, enable the oil mist to slowly converge and flow into the oil in the fuel tank, clear the internal vision of the outer fuel tank, and reduce the replacement frequency of the felt above the fuel tank. The structure of the present utility model is simple and the appearance is regular, reducing the maintenance cost, and it can be widely applied to various units. Brief Description of the Drawings

[0006] Figure 1 It is a detailed drawing of the oil mist eliminator for the water guide bearing.

[0007] Description of the component numbers in the drawings:

[0008] 1 - Inner oil baffle; 2 - Flow stabilizer plate; 3 - Bolt; 4 - Upper flange; 5 - Vertical ring; 6 - Screw; 7 - Lower flange; 8 - Follow-up oil baffle; 9 - Fuel tank cover; 10 - Upper fuel tank; 11 - Bearing body; 12 - Lower fuel tank; 13 - Cooler; 14 - Bearing bush. Specific Embodiments

[0009] The present utility model will be described in detail below in conjunction with the drawings and specific embodiments.

[0010] It should be noted that the terms "upper", "lower", "inner" and other similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation manner.

[0011] As Figure 1 shown, an oil mist eliminator for a water guide bearing has an overall wrapped structure, including an upper flange 4, a vertical ring 5, and a lower flange 7. The upper flange 4, the vertical ring 5, and the lower flange 7 are fixed together by welding to form the above-mentioned oil baffle support. The lower flange 7 is fixed on the bearing body 11 by screws 6. The vertical ring 5 circumferentially wraps the main shaft and covers the bearing bush 14 in a circle. During the operation of the bearing bush 14, the oil film between the main shaft and the main shaft will gradually heat up during the high-speed rotation of the main shaft. During the process of the oil film temperature gradually rising and the continuous increase of the main shaft speed, oil mist will be formed and some oil will be thrown out in a liquid state from the upper end where the bearing bush 14 contacts the main shaft. An observation window is provided on the fuel tank cover 9 to observe the oil level and the working state of the main shaft. However, the splashed oil droplets and oil mist will greatly affect the internal vision of the upper fuel tank 10. Therefore, the vertical ring 5 and the flow stabilizer plate 2 are bolted to the upper flange 4 to form a sealing structure. The vertical ring 5 circumferentially blocks the splashing of oil mist, and the flow stabilizer plate 2 blocks the rising of oil mist in the vertical direction. There is a gap between the flow stabilizer plate 2 and the main shaft. An inner oil baffle 1 is provided on the flow stabilizer plate 2 and bolted. The inner oil baffle 1 is in small clearance fit with the main shaft to prevent oil mist from flowing out. The hardness of the inner oil baffle 1 is much smaller than that of the main shaft and will not cause damage to the main shaft. Multiple radial oil discharge holes are provided in the circumferential direction of the vertical ring 5. The splashed oil mist intercepted by the vertical ring 5 and the flow stabilizer plate 2 slowly converges and flows into the upper fuel tank 10 through the radial oil discharge holes.

[0012] The bearing body 11 fixedly supports the bearing bush 14. The bearing body 11 separates the upper oil tank 10 and the lower oil tank 12. A cooler 13 is arranged inside the lower oil tank 12 to reduce the oil temperature. The upper oil tank 10 and the oil tank cover 9 are bolted together. An observation window is arranged on the oil tank cover 9 to observe the internal situation of the upper oil tank 10. A follow-up oil baffle 8 is bolted to the oil tank cover 9. The follow-up oil baffle 8 is closely fitted with the main shaft seal to prevent oil mist from overflowing from the oil tank and entering the rest of the unit environment.

[0013] In the present utility model, the newly provided oil mist elimination device can effectively eliminate oil mist. Without damaging the main shaft, the flow stabilizing plate 2 and the vertical ring 5 prevent the oil mist from splashing, so that the oil mist converges slowly and flows into the oil in the upper oil tank 10, clearing the internal vision of the upper oil tank 10, facilitating observation through the window of the oil tank cover 9, greatly reducing the working pressure of the follow-up oil baffle 8, and reducing the frequency of felt replacement. The structure of the present utility model is simple and the appearance is regular, reducing the maintenance cost, and it can be widely applied to various units.

[0014] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0015] The above has made a detailed description of the preferred embodiment of the present utility model. However, the present utility model is not limited to the above embodiment. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present utility model.

Claims

1. An oil mist elimination device for a water guide bearing, characterized in that: The whole is a wrapped structure. The vertical ring (5), lower flange (7), and upper flange (4) are welded together. The inner oil baffle ring (1) and the flow stabilizer plate (2) are bolted and connected to the upper flange (4). The lower flange (7) is fixed on the bearing body (11) by screws (6).

2. The oil mist elimination device for a water guide bearing according to claim 1, wherein: The inner oil baffle ring (1) has a small clearance fit with the main shaft.

3. The oil mist elimination device for a water guide bearing according to claim 1, wherein: The hardness of the inner oil baffle ring (1) is less than that of the main shaft.

4. A water guide bearing oil mist elimination device according to claim 1, characterized in that: Multiple radial oil discharge holes are arranged circumferentially on the vertical ring (5).

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