A filter core structure for a fume removal device of a steam turbine oil system

Abstract

A filter core structure for oil fume removal equipment of a steam turbine oil system, the filter core structure comprising an outer filter core assembly and an inner filter core assembly; the outer filter core assembly comprising an outer filter core, an outer top cover and an outer bottom cover; the outer top cover covering the top of the outer filter core, the outer top cover having an opening in the middle; the outer bottom cover covering the bottom of the outer filter core; the inner filter core assembly comprising an inner filter core, an inner top cover and an inner bottom cover; the inner top cover covering the top of the inner filter core, the inner top cover having an opening in the middle; the inner bottom cover covering the bottom of the inner filter core; the lower end of the inner filter core assembly being inserted into the outer filter core assembly from the opening in the middle of the outer top cover, the inner top cover being fixed on the outer top cover; a gap being present between the outer surface of the inner filter core and the inner side of the outer filter core; the distance between the inner bottom cover and the outer bottom cover being greater than or equal to half the distance between the outer top cover and the outer bottom cover. The filter core structure can ensure sufficient filtration of oil fume and avoid air carrying oil when the air is discharged from the filter core structure.

Description

Technical Field

[0001] This utility model relates to the field of oil fume filtration in turbine oil systems, specifically a filter element structure for oil fume removal equipment in turbine oil systems. Background Technology

[0002] With the continuous development of power systems, steam turbines are being used in increasingly widespread projects. A steam turbine is a machine that uses the mechanical work output by the expansion of gas to obtain energy. The thermal energy of the steam produced by the boiler is converted into kinetic energy in the nozzles, and the moving blades further convert kinetic energy into mechanical energy. In reaction blades, the steam is directly converted from thermal energy to mechanical energy in the expansion section of the moving blades. The turbine rotor and the generator rotor are connected by a coupling. When the turbine rotor rotates at a certain speed, the generator rotor also rotates. Due to electromagnetic induction, current is generated in the generator stator coils, which supplies power to users through power distribution equipment. During the operation of the steam turbine unit, lubricating oil is required to form a continuous oil film in the bearings and gearbox to protect the main bearings and ensure normal operation. Forming the oil film itself only requires a small amount of lubricating oil, but due to heat transfer from the bearing rotor, friction on the bearing surfaces, and the turbulence of the lubricating oil itself, a large amount of heat is generated. To maintain the normal operating temperature of the bearings, a larger amount of oil is needed to cool them. Simultaneously, the oil system generates a large amount of oil fumes during operation. Therefore, it is necessary to treat these oil fumes to meet environmental protection requirements. This oil fume filter element is specifically designed to remove oil fumes from oil systems.

[0003] The turbine oil system is a crucial component of a steam turbine. During operation, it generates a significant amount of oil fumes, necessitating the addition of an oil fume removal device at the end of the system. Existing oil fume removal devices have simple filter structures, consisting of a filter element, a top cover, and a bottom cover. The top cover sits atop the filter element with an opening in the center, while the bottom cover sits atop the filter element. During filtration, oil fumes enter the filter element from the side, and the filtered oil accumulates on the bottom cover, while air is discharged from the top cover. However, when excessive oil accumulates on the bottom cover, the filtered air mixes with the oil again and is then discharged directly from the top cover, potentially polluting the external environment.

[0004] Therefore, in order to address the above problems, it is particularly necessary to provide a new filter structure to ensure sufficient filtration of oil fumes and prevent the air discharged from the filter structure from carrying oil. Summary of the Invention

[0005] The purpose of this invention is to provide a filter element structure for an oil fume removal device in a turbine oil system, which addresses the aforementioned problems. This filter element structure ensures sufficient filtration of oil fumes and prevents the air discharged from the filter element structure from carrying oil.

[0006] The technical solution adopted in this invention is as follows: A filter element structure for an oil fume removal device in a steam turbine oil system, the filter element structure comprising an outer filter element assembly and an inner filter element assembly; The external filter assembly includes an external filter element, an external top cover, and an external bottom cover; the external top cover covers the top of the external filter element and has an opening in the middle; the external bottom cover covers the bottom of the external filter element. The inner filter assembly includes an inner filter element, an inner top cover, and an inner bottom cover; the inner top cover covers the top of the inner filter element and has an opening in the middle; the inner bottom cover covers the bottom of the inner filter element. The lower end of the inner filter element assembly is inserted into the outer filter element assembly through the opening in the middle of the outer top cover, and the inner top cover is fixed on the outer top cover; There is a gap between the outer side of the inner filter element and the inner side of the outer filter element; the distance between the inner bottom cover and the outer bottom cover is greater than or equal to half the distance between the outer top cover and the outer bottom cover.

[0007] Furthermore, the central axes of the inner filter element and the outer filter element coincide.

[0008] Furthermore, the inner filter element is provided with one or more connecting rods; the lower end of the connecting rod passes through the bottom of the inner bottom cover and is detachably connected to the outer bottom cover; the upper end of the connecting rod passes through the inner top cover; the connecting rod is provided with an upper limit nut and a lower limit nut; the upper limit nut is located above the inner top cover, and the lower surface of the upper limit nut contacts the top surface of the inner top cover; the lower limit nut is located below the inner bottom cover, and the upper surface of the lower limit nut contacts the bottom surface of the inner bottom cover.

[0009] Furthermore, multiple connecting rods are provided, and the connecting rods are arranged in a circular array around the central axis of the inner filter element.

[0010] Furthermore, the external filter assembly includes an external filter frame one, an external filter frame two, and an external filter frame three arranged sequentially from the inside to the outside in a cylindrical mesh structure; an external filter layer one is disposed between the external filter frame one and the external filter frame two; and an external filter layer two is disposed between the external filter frame two and the external filter frame three.

[0011] Furthermore, the inner filter assembly includes an inner filter frame one, an inner filter frame two, and an inner filter frame three arranged sequentially from the inside to the outside in a cylindrical mesh structure; an inner filter filter layer one is disposed between the inner filter frame one and the inner filter frame two; and an inner filter filter layer two is disposed between the inner filter frame two and the inner filter frame three.

[0012] Furthermore, the outer filter element filter layer one and the inner filter element filter layer one are made of stainless steel filter screens; the outer filter element filter layer two and the inner filter element filter layer two are made of glass fiber filter screens.

[0013] Furthermore, the mesh diameter on the outer filter element filter layer one is greater than or equal to the mesh diameter on the inner filter element filter layer one; the mesh diameter on the outer filter element filter layer two is greater than or equal to the mesh diameter on the inner filter element filter layer two.

[0014] Furthermore, the mesh structure on inner filter element frame 1, inner filter element frame 2, inner filter element frame 3, outer filter element frame 1, outer filter element frame 2, and outer filter element frame 3 is a honeycomb mesh.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In this invention, the fumes first enter the outer filter element from the side. After filtration, the oil accumulates on the outer bottom cover. Then, air enters the inner filter element from the side for secondary filtration, and finally, the air is discharged from the inner top cover. The presence of the inner filter element ensures that the fumes are filtered again, guaranteeing thorough filtration and preventing the air exiting the filter structure from carrying oil. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is a partial structural diagram of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 or an electrical connection; they can refer to 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 invention based on the specific circumstances.

[0023] like Figure 1 and 2 As shown, the present invention discloses a filter element structure for an oil fume removal device for a steam turbine oil system, the filter element structure comprising an outer filter element assembly and an inner filter element assembly; The external filter assembly includes an external filter element, an external top cover 1, and an external bottom cover 7; the external top cover 1 covers the top of the external filter element and has an opening in the middle; the external bottom cover 7 covers the bottom of the external filter element. The inner filter assembly includes an inner filter element, an inner top cover 14, and an inner bottom cover 10; the inner top cover 14 covers the top of the inner filter element and has an opening in the middle; the inner bottom cover 10 covers the bottom of the inner filter element. The lower end of the inner filter element assembly is inserted into the outer filter element assembly through the opening in the middle of the outer top cover 1, and the inner top cover 14 is fixed on the outer top cover 1; There is a gap between the outer side of the inner filter element and the inner side of the outer filter element; the distance between the inner bottom cover 10 and the outer bottom cover 7 is greater than or equal to half the distance between the outer top cover 1 and the outer bottom cover 7.

[0024] Due to the above structure, the fumes first enter the outer filter element from the side. After filtration, the oil accumulates on the outer bottom cover 7. Then, the air enters the inner filter element from the side for secondary filtration. Finally, the air is discharged from the inner top cover 14.

[0025] Because of the presence of the inner filter element, the fumes can be filtered again, ensuring that the fumes are fully filtered and preventing the air discharged from the filter element structure from carrying oil.

[0026] Because oil is heavier than air, air tends to rise while oil tends to sink. Therefore, when filtered air is within the gap between the outer side of the inner filter element and the inner side of the outer filter element, this gap ensures sufficient time for the oil to settle, reducing the amount of oil present when air enters the inner filter element. Simultaneously, the distance between the inner bottom cover 10 and the outer bottom cover 7 is greater than or equal to half the distance between the outer top cover 1 and the outer bottom cover 7, keeping the inner filter elements as far apart as possible to prevent air from contaminating the oil on the outer bottom cover 7, while also providing time for the hydraulic fluid inside the outer filter element to settle. Therefore, in practical implementation, the distance between the inner bottom cover 10 and the outer bottom cover 7 should be as large as possible, as should the gap between the outer side of the inner filter element and the inner side of the outer filter element.

[0027] Furthermore, the central axes of the inner filter element and the outer filter element coincide.

[0028] Furthermore, the inner filter element is provided with one or more connecting rods 17; the lower end of the connecting rod 17 passes through the bottom of the inner bottom cover 10 and is detachably connected to the outer bottom cover 7, and the detachable connection can be a threaded connection; the upper end of the connecting rod 17 passes through the inner top cover 14; the connecting rod 17 is provided with an upper limit nut 15 and a lower limit nut 16; the upper limit nut 15 is located above the inner top cover 14, and the lower surface of the upper limit nut 15 contacts the top surface of the inner top cover 14; the lower limit nut 16 is located below the inner bottom cover 10, and the upper surface of the lower limit nut 16 contacts the bottom surface of the inner bottom cover 10.

[0029] In existing filter element structures, the filter element is often glued to the top and bottom covers. If the entire filter element structure is heavy, the bottom cover is prone to detaching when a large amount of oil accumulates on it. In this application, the outer bottom cover 7, inner bottom cover 10, and inner top cover 14 are fixed together by a connecting rod 17, which prevents the inner bottom cover 10 and outer bottom cover 7 from detaching after a large amount of oil accumulates on them. This ensures greater stability of the entire filter element structure.

[0030] Furthermore, multiple connecting rods 17 are provided, and the connecting rods 17 are arranged in a circular array around the central axis of the inner filter element. The multiple connecting rods 17 cooperate with each other to further ensure the stability of the entire filter element structure.

[0031] Furthermore, the external filter assembly includes an external filter frame 4, an external filter frame 5, and an external filter frame 6 arranged sequentially from the inside to the outside in a cylindrical mesh structure; an external filter layer 8 is disposed between the external filter frame 4 and the external filter frame 25; and an external filter layer 9 is disposed between the external filter frame 25 and the external filter frame 36.

[0032] Furthermore, the inner filter assembly includes an inner filter frame 13, an inner filter frame 2 12, and an inner filter frame 3 11 arranged sequentially from the inside to the outside in a cylindrical mesh structure; an inner filter layer 1 3 is disposed between the inner filter frame 13 and the inner filter frame 2 12; and an inner filter layer 2 2 is disposed between the inner filter frame 2 12 and the inner filter frame 3 11.

[0033] In this invention, both the outer filter element assembly and the inner filter element assembly are multi-layered filters, which can further improve the filtration effect.

[0034] Furthermore, the outer filter element filter layer 8 and the inner filter element filter layer 3 are made of stainless steel mesh; the outer filter element filter layer 9 and the inner filter element filter layer 2 are made of glass fiber mesh.

[0035] Furthermore, the mesh diameter on the outer filter element filter layer 8 is greater than or equal to the mesh diameter on the inner filter element filter layer 3; the mesh diameter on the outer filter element filter layer 9 is greater than or equal to the mesh diameter on the inner filter element filter layer 2.

[0036] Furthermore, the mesh structure on the inner filter element frame 13, inner filter element frame 2 12, inner filter element frame 3 11, outer filter element frame 1 4, outer filter element frame 2 5, and outer filter element frame 3 6 is a honeycomb mesh. Compared to round holes, the honeycomb mesh allows for more pores to be set throughout the frame, enabling the oil fumes to pass through the frame more evenly and smoothly.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A filter element structure for an oil fume removal device in a steam turbine oil system, characterized in that: The filter element structure includes an outer filter element assembly and an inner filter element assembly; The external filter assembly includes an external filter element, an external top cover (1), and an external bottom cover (7); the external top cover (1) covers the top of the external filter element and has an opening in the middle; the external bottom cover (7) covers the bottom of the external filter element. The inner filter assembly includes an inner filter, an inner top cover (14), and an inner bottom cover (10); the inner top cover (14) covers the top of the inner filter and has an opening in the middle; the inner bottom cover (10) covers the bottom of the inner filter. The lower end of the inner filter element assembly is inserted into the outer filter element assembly through the opening in the middle of the outer top cover (1), and the inner top cover (14) is fixed on the outer top cover (1); There is a gap between the outer side of the inner filter element and the inner side of the outer filter element; the distance between the inner bottom cover (10) and the outer bottom cover (7) is greater than or equal to half the distance between the outer top cover (1) and the outer bottom cover (7).

2. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 1, characterized in that: The central axes of the inner filter element and the outer filter element coincide.

3. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 2, characterized in that: The inner filter element is provided with one or more connecting rods (17); the lower end of the connecting rod (17) passes through the bottom of the inner bottom cover (10) and is detachably connected to the outer bottom cover (7); the upper end of the connecting rod (17) passes through the inner top cover (14); the connecting rod (17) is provided with an upper limit nut (15) and a lower limit nut (16); the upper limit nut (15) is located above the inner top cover (14), and the lower surface of the upper limit nut (15) is in contact with the top surface of the inner top cover (14); the lower limit nut (16) is located below the inner bottom cover (10), and the upper surface of the lower limit nut (16) is in contact with the bottom surface of the inner bottom cover (10).

4. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 3, characterized in that: The connecting rod (17) is provided in multiple forms, and the connecting rod (17) is arranged in a ring array around the central axis of the inner filter element.

5. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 4, characterized in that: The external filter assembly includes an external filter frame one (4), an external filter frame two (5), and an external filter frame three (6) arranged sequentially from the inside to the outside in a cylindrical mesh structure; an external filter layer one (8) is provided between the external filter frame one (4) and the external filter frame two (5); and an external filter layer two (9) is provided between the external filter frame two (5) and the external filter frame three (6).

6. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 5, characterized in that: The inner filter assembly includes an inner filter frame one (13), an inner filter frame two (12), and an inner filter frame three (11) arranged sequentially from the inside to the outside in a cylindrical mesh structure; an inner filter filter layer one (3) is provided between the inner filter frame one (13) and the inner filter frame two (12); and an inner filter filter layer two (2) is provided between the inner filter frame two (12) and the inner filter frame three (11).

7. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 6, characterized in that: The outer filter element filter layer one (8) and the inner filter element filter layer one (3) are made of stainless steel mesh; the outer filter element filter layer two (9) and the inner filter element filter layer two (2) are made of glass fiber mesh.

8. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 7, characterized in that: The mesh diameter on the outer filter element filter layer one (8) is greater than or equal to the mesh diameter on the inner filter element filter layer one (3); the mesh diameter on the outer filter element filter layer two (9) is greater than or equal to the mesh diameter on the inner filter element filter layer two (2).

9. The filter element structure for an oil fume removal device in a steam turbine oil system according to claim 8, characterized in that: The mesh structure on the inner filter element frame 1 (13), inner filter element frame 2 (12), inner filter element frame 3 (11), outer filter element frame 1 (4), outer filter element frame 2 (5) and outer filter element frame 3 (6) is a honeycomb mesh.

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