A front-end filtration system and oil mist suction device for a water-conducting bearing.

Abstract

This utility model relates to the field of hydropower technology, specifically to a front-end filtration system and oil mist suction device for a water-guided bearing oil mist suction device. It includes a guide pipe, a front-end connecting flange at the first end of the guide pipe, and a rear-end connecting flange at the second end of the guide pipe. The front-end connecting flange is adapted to the oil mist overflow hole of the oil tank cover, and the rear-end connecting flange is adapted to the air inlet of the oil mist suction device. Several baffles are staggered along the axial direction inside the guide pipe. The first end of each baffle is connected to the inner wall of the guide pipe, and the second end of each baffle is inclined and extends towards the central axis of the guide pipe, forming an oil mist flow channel between the second ends of each baffle. This utility model utilizes a barrier baffle design, allowing oil mist to enter the oil mist suction device through the oil mist flow channel formed between the second ends of the baffles, while oil and impurities return to the oil tank due to the barrier effect of the baffles. This effectively reduces sludge accumulation and eliminates the need for regular cleaning of the filtration system.

Description

Technical Field

[0001] This utility model relates to the field of hydropower technology, and more specifically, to a front-end filtration system and an oil mist suction device for a water-conducting bearing. Background Technology

[0002] Water guide bearings, as a crucial component of hydro-generator units, play a vital role in supporting the main shaft, reducing friction, and maintaining the stability of the unit's axis, ensuring the safe and stable operation of the hydro-generator unit. During operation, the high-speed rotation of the turbine main shaft and the resulting increase in oil temperature cause the lubricating oil to atomize. This atomized oil overflows through the breather, oil sump cover, and the gap between the main shaft and the waterwheel, causing oil mist to permeate the waterwheel chamber and accumulate on the equipment surface. This will affect the operation of the equipment in the waterwheel chamber and cause some environmental pollution. Severe oil mist can even affect the safe and stable operation of the hydro-generator unit.

[0003] To solve the problem of oil mist dispersion, an oil mist suction device is usually installed by opening holes in the cover plate of the water guide oil tank. However, since the oil in the water guide oil tank may be directly thrown to the oil mist suction device as the unit rotates, the efficiency of the oil mist suction device will be reduced or the oil mist suction device will be directly damaged. Therefore, a filtration system for filtering or blocking oil droplets and impurities needs to be installed in front of the oil mist suction device. Currently, the filtration system in front of the oil mist suction device usually uses a filter screen, which can prevent oil droplets and impurities from entering the oil mist suction device to a certain extent. However, the following defects still exist: (1) The sludge formed by oil droplets and impurities is very easy to accumulate on the filter screen, which leads to filter screen blockage, resulting in insufficient flow of the filter screen, causing the efficiency of the oil mist suction device to decrease. In severe cases, it may even lead to overload and burnout of the oil mist suction device; (2) Due to the accumulation of sludge, the filter screen needs to be cleaned regularly. Currently, the cleaning of the filter screen requires the removal of the filter screen after the unit is shut down, which seriously affects the operating efficiency of the unit. Utility Model Content

[0004] The purpose of this utility model is to provide a front-end filtration system and an oil mist suction device for a water-conducting bearing, so as to solve the technical problems pointed out in the background art.

[0005] This utility model is achieved through the following technical solution: a front-end filtration system for a water-guided bearing oil mist suction device, comprising a guide pipe, a front-end connecting flange located at the first end of the guide pipe, and a rear-end connecting flange located at the second end of the guide pipe;

[0006] The front connecting flange is adapted to the oil mist overflow hole of the oil tank cover plate, the rear connecting flange is adapted to the air inlet of the oil mist absorption device, and a number of baffles are staggered along the axial direction inside the guide pipe. The first end of the baffle is connected to the inner wall of the guide pipe, and the second end of the baffle is inclined and extends toward the central axis of the guide pipe. An oil mist flow channel is formed between the second ends of each baffle.

[0007] According to a preferred embodiment, the guide pipe includes a first pipe section, a reducing pipe section, and a second pipe section. The reducing pipe section is connected between the first pipe section and the second pipe section. The first pipe section is connected to a front-end connecting flange, and the diameter of the second pipe section is larger than that of the first pipe section.

[0008] According to a preferred embodiment, the guide pipe is provided with a first baffle and a second baffle.

[0009] According to a preferred embodiment, the first end of the first baffle is connected to the junction of the first pipe section and the variable diameter pipe section, and the first end of the second baffle is connected to the junction of the second pipe section and the variable diameter pipe section.

[0010] According to a preferred embodiment, the outer side of the guide pipe is provided with an oil collecting ring groove, and the opening of the oil collecting ring groove faces upward.

[0011] According to a preferred embodiment, the oil collecting ring groove is connected to the variable diameter pipe section.

[0012] According to a preferred embodiment, the oil collecting ring groove is provided with an oil drain valve.

[0013] According to a preferred embodiment, the second end of the baffle is inclined downward.

[0014] According to a preferred embodiment, the lower end of the front connecting flange and the upper end of the rear connecting flange are flared.

[0015] This utility model also provides a water-guided bearing oil mist suction device, including a front-end filtration system as described above, and a cooling system, wherein the cooling system is disposed between the front-end filtration system and the oil mist overflow hole of the oil tank cover plate.

[0016] The technical solution of the front-end filtration system and oil mist suction device of the water-conducting bearing provided by this utility model has at least the following advantages and beneficial effects: (1) The front-end filtration system utilizes the design of a barrier baffle, and the oil mist can enter the oil mist suction device through the oil mist flow channel formed between the second ends of the baffle, while the oil and impurities will return to the oil tank due to the barrier of the baffle, thereby effectively reducing the accumulation of sludge and eliminating the need for regular cleaning of the filtration system; (2) Since there is no need for regular cleaning of the filtration system, the burden on maintenance personnel is reduced; (3) The oil collection ring groove can receive the oil droplets that condense after the oil mist is absorbed by the oil mist suction device, thereby avoiding environmental pollution caused by oil droplets. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front-end filtration system provided in Embodiment 1 of the present invention;

[0018] Reference numerals: 100-guide pipe, 110-first baffle, 120-second baffle, 200-front connecting flange, 300-rear connecting flange, 400-oil groove, 500-oil collecting ring groove, 510-oil drain valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Example 1

[0021] This embodiment provides a front-end filtration system for a water-conducting bearing oil mist absorption device. Figure 1 See the schematic diagram of the front-end filtration system. Figure 1 As shown, the front-end filtration system includes a guide pipe 100, a front-end connecting flange 200, and a rear-end connecting flange 300. The front-end connecting flange 200 is located at the first end of the guide pipe 100, and the rear-end connecting flange 300 is located at the second end of the guide pipe 100, so as to connect with the oil tank 400 cover plate and the oil mist suction device and establish a path for oil mist circulation.

[0022] The front connecting flange 200 is adapted to the oil mist overflow hole of the oil tank 400 cover plate, and the rear connecting flange 300 is adapted to the air inlet of the oil mist suction device. The lower end of the front connecting flange 200 and the upper end of the rear connecting flange 300 are funnel-shaped, which helps the oil mist to gather and guide. It should be noted that a sealing structure should also be provided at the connection between the front connecting flange 200 and the rear connecting flange 300 to prevent oil mist from overflowing from the sealing gap.

[0023] Several baffles are staggered along the axial direction inside the guide pipe 100. The first end of the baffle is connected to the inner wall of the guide pipe 100, and the second end of the baffle is inclined and extends toward the central axis of the guide pipe 100. An oil mist flow channel is formed between the second ends of each baffle.

[0024] The aforementioned front-end filtration system utilizes a barrier baffle design, allowing oil mist to enter the oil mist suction device through the oil mist flow channel formed between the second ends of the baffle. Meanwhile, oil and impurities will return to the oil tank 400 due to the barrier of the baffle. This effectively reduces sludge accumulation and eliminates the need for regular cleaning of the filtration system, thereby reducing the burden on maintenance personnel.

[0025] Example 2

[0026] This embodiment, based on the technical solution provided in Embodiment 1, further explains the internal structure of the guide pipe 100:

[0027] In this embodiment, the guide pipe 100 is a reducing pipe, comprising a first pipe section, a reducing pipe section, and a second pipe section. The reducing pipe section connects the first pipe section and the second pipe section. The first pipe section is connected to the front connecting flange 200, and the diameter of the second pipe section is larger than that of the first pipe section. Specifically, the reducing pipe design of the guide pipe 100 can change the flow velocity and pressure during the oil mist flow process. When the oil mist flows from the first pipe section through the reducing pipe section into the second pipe section, the flow velocity decreases and the pressure decreases due to the increased pipe diameter. This helps the oil and impurities in the oil mist to better contact the baffle and be blocked. At the same time, it also allows the oil mist to have more flow space in the second pipe section, further improving the filtration effect.

[0028] Furthermore, the second end of the baffle is inclined downwards, and the guide pipe 100 is provided with a first baffle 110 and a second baffle 120. The first end of the first baffle 110 is connected to the junction of the first pipe section and the variable diameter pipe section, and the first end of the second baffle 120 is connected to the junction of the second pipe section and the variable diameter pipe section. The staggered arrangement of the first baffle 110 and the second baffle 120 forms a complex oil mist flow path, which increases the contact opportunity between the oil mist and the baffle, so that the oil and impurities in the oil mist can be more fully combined by the first baffle 110 and the second baffle 120, improving the filtration efficiency and effect, and ensuring that the oil mist entering the oil mist suction device is purer.

[0029] Example 3

[0030] This embodiment, based on the technical solution provided in Embodiment 2, further describes the external structure of the guide pipe 100:

[0031] In this embodiment, an oil collecting ring groove 500 is provided on the outer side of the guide pipe 100, and the opening of the oil collecting ring groove 500 faces upward, so as to receive the oil droplets that condense after the oil mist is absorbed by the oil mist device, thereby avoiding environmental pollution caused by oil droplets.

[0032] In some specific embodiments of this example, the oil collecting ring groove 500 is connected to the reducing pipe section and maintains a certain distance from the rear connecting flange 300 to prevent interference. The oil collecting ring groove 500 is equipped with a drain valve 510, which allows oil to be drained when the oil collecting ring groove 500 is full.

[0033] Example 4

[0034] This embodiment, based on the technical solutions provided in any one of Embodiments 1 to 3, provides a water-guided bearing oil mist suction device. The water-guided bearing oil mist suction device includes a front-end filtration system as described in any one of Embodiments 1 to 3, and a cooling system. The cooling system is located between the front-end filtration system and the oil mist overflow hole of the oil tank 400 cover plate. Specifically, the cooling system can cool the oil mist overflowing from the oil tank 400 cover plate. After cooling, the oil vapor in the oil mist can condense into oil droplets, making it easier for the baffles in the filtration system to block the droplets, improving the filtration effect, reducing the amount of oil entering the oil mist suction device, and further protecting the oil mist suction device.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A front end filtration system for a water-lubricated bearing oil mist extractor, characterized by, It includes a guide pipe (100), a front connecting flange (200) located at the first end of the guide pipe (100), and a rear connecting flange (300) located at the second end of the guide pipe (100); The front connecting flange (200) is adapted to the oil mist overflow hole of the oil tank (400) cover plate, the rear connecting flange (300) is adapted to the air inlet of the oil mist suction device, and a number of baffles are staggered along the axial direction in the guide pipe (100). The first end of the baffle is connected to the inner wall of the guide pipe (100), and the second end of the baffle is inclined and extends toward the central axis of the guide pipe (100). An oil mist flow channel is formed between the second ends of each baffle.

2. The front end filtration system of an oil mist lubrication apparatus for a hydrodynamic bearing according to claim 1, characterized in that, The guide pipe (100) includes a first pipe section, a reducing pipe section and a second pipe section. The reducing pipe section is connected between the first pipe section and the second pipe section. The first pipe section is connected to the front connecting flange (200). The diameter of the second pipe section is larger than that of the first pipe section.

3. The front end filtration system of an oil mist lubrication apparatus for a hydrodynamic bearing according to claim 2, wherein The guide pipe (100) is provided with a first baffle (110) and a second baffle (120).

4. The front end filtration system of an oil mist lubrication apparatus for a hydrodynamic bearing according to claim 3, wherein The first end of the first baffle (110) is connected to the junction of the first pipe section and the variable diameter pipe section, and the first end of the second baffle (120) is connected to the junction of the second pipe section and the variable diameter pipe section.

5. The front end filtration system of an oil mist lubrication apparatus for a hydrodynamic bearing according to claim 2, wherein The guide pipe (100) is provided with an oil collecting ring groove (500) on the outside, and the opening of the oil collecting ring groove (500) faces upward.

6. The front end filtration system of an oil mist lubrication apparatus for a hydrodynamic bearing according to claim 5, wherein The oil collecting ring groove (500) is connected to the variable diameter pipe section.

7. The front end filtration system of an oil mist lubrication apparatus for a hydrodynamic bearing according to claim 6, wherein An oil drain valve (510) is provided on the oil collecting ring groove (500).

8. The front-end filtration system of the water-guided bearing oil mist suction device as described in claim 1, characterized in that, The second end of the baffle is inclined downward.

9. The front end filtration system of an oil mist lubrication apparatus for a hydrodynamic bearing according to claim 1, wherein The lower end of the front connecting flange (200) and the upper end of the rear connecting flange (300) are flared.

10. A water-lubricated bearing oil mist extractor characterized by comprising: The device includes a front-end filtration system for the water-guided bearing oil mist suction device as described in any one of claims 1 to 9, and a cooling system disposed between the front-end filtration system and the oil mist overflow hole of the oil tank (400) cover plate.

Images