A seal for an air preheater rotor

Abstract

The application relates to the technical field of air preheater sealing, in particular to an air preheater rotor sealing device. The sealing device is arranged on the upper portion of a partition plate and comprises a mounting piece composed of a connecting plate and a stress plate. The side wall of the stress plate is fixedly connected with the lower portion of the plate surface of the connecting plate, so that the end surface of the mounting piece is in L shape. The outer plate surface of the connecting plate is fixedly connected with the upper end of the plate surface of the partition plate. The lower end of the outer plate surface of the connecting plate is arranged in a spaced mode with the partition plate. The connecting plate is arranged in an inclined mode. The side, away from the connecting plate, of the stress plate is provided with a fixed plate. The plate surface of the fixed plate is opposite to the plate surface of the connecting plate. A sealing piece is arranged in a sliding mode between the connecting plate and the fixed plate. The plate surface of the fixed plate is attached to the side wall of the sealing piece and the side wall of the stress plate. The side wall, away from the stress plate, of the sealing piece can protrude from the side wall, away from the stress plate, of the connecting plate and the fixed plate. The air preheater rotor is flexibly sealed, and the air leakage rate is reduced.

Description

Technical Field

[0001] This application relates to the field of air preheater sealing technology, and in particular to an air preheater rotor sealing device. Background Technology

[0002] Currently, an air preheater is a heat exchange surface that preheats the air entering the boiler to a certain temperature by using internal heat exchange fins to heat the flue gas in the boiler tail flue. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption. There will be a gap between the flue gas side and the air side of the air preheater rotor. When the air preheater rotor is running in a high-temperature environment, high-pressure air will leak into the low-pressure flue gas side, which will lead to problems such as reduced boiler thermal efficiency and increased fuel consumption. Therefore, a sealing device is needed to seal the air preheater rotor.

[0003] The existing sealing structure involves bending the upper end of the rotor's partition plate in the opposite direction of rotor rotation. During rotation, the bent partition plate directly contacts the lower surface of the fixed sector plate to seal the air preheater rotor.

[0004] The existing technical solutions mentioned above have the following drawbacks: when the rotor rotates in a high-temperature environment for a long time, the bent partition plate will have gaps with the fixed sector plate due to long-term direct contact friction, resulting in an increase in its air leakage rate. Utility Model Content

[0005] This application provides an air preheater rotor sealing device to provide flexible sealing for the air preheater rotor and reduce the air leakage rate.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0007] An air preheater rotor sealing device includes an installation component consisting of a connecting plate and a load-bearing plate. The sidewall of the load-bearing plate is fixedly connected to the lower part of the connecting plate surface, making the end face of the installation component L-shaped. The outer surface of the connecting plate is fixedly connected to the upper part of the partition plate surface. The lower end of the outer surface of the connecting plate is spaced apart from the partition plate. The connecting plate is inclined. A fixing plate is provided on the side of the load-bearing plate away from the connecting plate. The surface of the fixing plate is opposite to the surface of the connecting plate. A sealing element is slidably arranged between the connecting plate and the fixing plate. The surface of the fixing plate is in contact with the sidewall of the sealing element and the sidewall of the load-bearing plate. The sidewall of the sealing element away from the load-bearing plate can protrude from the sidewall of the connecting plate and the fixing plate away from the load-bearing plate.

[0008] By adopting the above technical solution, by setting up an installation component consisting of a connecting plate and a load-bearing plate, as well as a fixing plate and a sealing component, the sealing component can protrude from the side wall of the connecting plate and the fixing plate away from the load-bearing plate. Since the connecting plate and the partition plate are inclined, the sealing component is inclined away from the side wall of the load-bearing plate. During the rotation of the rotor, when passing the sector plate, the lower edge of the sector plate first contacts the inclined side wall of the sealing component and compresses the sealing component towards the load-bearing plate, so that the edge of the side wall of the sealing component slides and fits against the lower surface of the sector plate. When the rotor rotates, the sliding of the sealing component achieves a flexible seal, reducing the gap caused by rigid friction, thereby reducing the air leakage rate of the air preheater.

[0009] Optionally, the force-bearing plate has multiple sliding holes evenly distributed on its surface, which connect the two surfaces of the force-bearing plate. Multiple limiting posts are fixed to the side wall of the sealing element opposite to the force-bearing plate. The axis of the limiting posts is perpendicular to the side wall of the sealing element. The limiting posts are adapted to the sliding holes and are slidably disposed in the sliding holes. A spring is provided between the force-bearing plate and the sealing element. The spring is sleeved on the periphery of the limiting posts. One end of the spring abuts against the side wall of the sealing element, and the other end of the spring abuts against the surface of the force-bearing plate.

[0010] By adopting the above technical solution, by setting a limiting post and a spring, the limiting post is adapted to the sliding hole and is slidably set, and the two ends of the spring abut against the sealing element and the force plate respectively. The limiting post can restrict the sliding trajectory of the sealing element, and at the same time, the elastic force of the spring can keep the sealing element in contact with the surface of the sector plate, continuously providing sealing pressure during the rotation of the rotor, and further reducing the air leakage rate.

[0011] Optionally, the end face of the limiting post away from the seal is provided with an installation notch, and a flipping baffle is rotatably arranged in the installation notch via a rotating shaft. The flipping baffle can be completely located in the installation notch, and an annular limiting gasket is provided between the flipping baffle and the force plate. The limiting gasket is sleeved on the peripheral wall of the limiting post.

[0012] By adopting the above technical solution, and by setting a flip-up baffle, a rotating shaft, and a limiting gasket, the flip-up baffle can rotate and be located between the installation notch and the force plate. The limiting gasket abuts against the flip-up baffle and the force plate. After the limiting post is installed, the flip-up baffle can be rotated to block the limiting gasket, thereby limiting the range of movement of the seal along the axis of the limiting post, reducing the possibility of the seal separating from the mounting part and the fixing plate, and enhancing the structural stability of the sealing device. At the same time, the rotatable flip-up baffle allows the sealing device to be installed conveniently.

[0013] Optionally, the end face edge of the limiting post away from the seal is machined into a conical shape.

[0014] By adopting the above technical solution, and by machining the edge of the limiting post away from the end face of the sealing element into a conical shape, the sliding hole position can be positioned more quickly when installing the limiting post, so that the limiting post can be inserted into the sliding hole more smoothly, thereby improving the installation efficiency of the sealing device.

[0015] Optionally, the corners where the sidewall of the flipping baffle intersects with the end face are all processed into chamfers.

[0016] By adopting the above technical solution, and by setting a chamfer at the corner where the side wall of the flipping baffle intersects with the end face, the frictional resistance when the flipping baffle rotates can be reduced, making it easier for the flipping baffle to rotate into place during installation and facilitating the fixing operation of the limiting post.

[0017] Optionally, the fixing plate has multiple circular connecting holes on its surface, the connecting holes connecting the two surfaces of the fixing plate, and bolt holes are provided on the opposite surfaces of the connecting plate and the fixing plate, with connecting bolts passing through the connecting holes and threadedly connected to the bolt holes.

[0018] By adopting the above technical solution, and by setting the connecting holes on the surface of the fixing plate, the bolt holes on the connecting plate, and the connecting bolts that pass through the connecting holes and are threaded into the bolt holes, the fixing plate can be detachably connected to the connecting plate, which facilitates subsequent inspection, maintenance or replacement of the sealing device and other operations.

[0019] Optionally, the connecting plate and the fixed plate are provided with multiple sliding grooves on their opposite surfaces. The length direction of the sliding groove is perpendicular to the length direction of the connecting plate. The sliding groove is provided with an opening on the side wall of the connecting plate and the fixed plate away from the force plate. A sliding member adapted to the sliding groove is provided at the corresponding position on the side wall of the sealing member. The sliding member is slidably disposed in the sliding groove.

[0020] By adopting the above technical solution, by setting sliding grooves on the opposite surfaces of the connecting plate and the fixed plate, and sliding parts adapted to the sliding grooves, the sliding parts are slidably set in the sliding grooves, which can restrict the sliding direction of the seal, so that the seal only moves along the length of the sliding groove, avoid the seal from shifting during operation, ensure that the contact position between the seal and the sector plate is accurate, and maintain a good sealing effect.

[0021] Optionally, the lower end of the outer plate of the connecting plate is connected to the partition plate via a support plate, one side wall of the support plate is fixedly connected to the plate surface of the connecting plate, and the other side wall of the support plate is inclined and fixedly connected to the plate surface of the partition plate.

[0022] By adopting the above technical solution, and by setting a support plate, one side of the support plate is fixed to the connecting plate, and the other side wall is inclined to fix the partition plate, so that the connecting plate is set at an angle. The angled side wall of the support plate increases the contact surface with the partition plate, enhances the connection strength between the connecting plate and the partition plate, and improves the structural stability of the installation component.

[0023] In summary, this application has the following technical effects:

[0024] 1. By setting up an installation component consisting of a connecting plate and a load-bearing plate, as well as a fixing plate and a sealing component, the sealing component can protrude from the side wall of the connecting plate and the fixing plate away from the load-bearing plate. Since the connecting plate and the partition plate are inclined, the sealing component is inclined away from the side wall of the load-bearing plate. During the rotation of the rotor, when passing the sector plate, the lower edge of the sector plate first contacts the inclined side wall of the sealing component and compresses the sealing component towards the load-bearing plate, so that the edge of the side wall of the sealing component slides and fits against the lower surface of the sector plate. When the rotor rotates, the sliding of the sealing component achieves a flexible seal, reducing the gap caused by rigid friction, thereby reducing the air leakage rate of the air preheater.

[0025] 2. By setting a limiting post and a spring, the limiting post is adapted to the sliding hole and is slidably set. The two ends of the spring abut against the sealing element and the force plate respectively. The limiting post can restrict the sliding trajectory of the sealing element, and at the same time, the elastic force of the spring can keep the sealing element in contact with the surface of the sector plate. During the rotation of the rotor, the sealing pressure is continuously provided, further reducing the air leakage rate.

[0026] 3. By setting up a flip-up baffle, a rotating shaft, and a limiting gasket, the flip-up baffle can rotate and is located between the installation notch and the force plate. The limiting gasket abuts against the flip-up baffle and the force plate. After the limiting post is installed, the flip-up baffle can be rotated to block the limiting gasket, limiting the range of movement of the seal along the axis of the limiting post, reducing the possibility of the seal separating from the mounting part and the fixing plate, and enhancing the structural stability of the sealing device. At the same time, the rotatable flip-up baffle makes the sealing device easy to install. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the object of this application;

[0028] Figure 2 This is a structural diagram of the internal components of the installation components in this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Compartment plate; 2. Mounting assembly; 21. Mounting component; 211. Connecting plate; 2111. Bolt hole; 212. Load-bearing plate; 22. Support plate; 23. Fixing plate; 231. Connecting hole; 24. Sliding groove; 25. Connecting bolt; 3. Sealing assembly; 31. Sealing element; 311. Sliding element; 32. Limiting post; 321. Mounting notch; 33. Spring; 34. Flipping baffle; 35. Rotating shaft; 36. Limiting gasket. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] This application discloses an air preheater rotor sealing device, which is installed on the compartment plate 1, as shown in the following embodiment. Figure 1 The sealing device includes an installation component 2 and a sealing component 3. The sealing component 3 is mounted on the installation component 2, which is mounted on the partition plate 1. The installation component 2 provides support for the sealing component 3. The sealing component 3 can provide a flexible seal for the air preheater rotor, thereby reducing the air leakage rate of the air preheater.

[0032] Combination Figure 1 and Figure 2 The installation component 2 includes an installation part 21, which consists of a connecting plate 211 and a load-bearing plate 212. The surface of the connecting plate 211 is perpendicular to the surface of the load-bearing plate 212. The length directions of the connecting plate 211 and the load-bearing plate 212 are parallel to each other. The side wall of the load-bearing plate 212 is fixedly connected to the surface of the connecting plate 211. The end face of the installation part 21 is L-shaped. A sealing component 3 is installed on the inner side of the installation part 21. The outer side of the installation part 21 is connected to the partition plate. The end of the outer surface of the connecting plate 211 away from the load-bearing plate 212 is fixedly connected to the upper end of the surface of the partition plate 1. The length direction of the installation part 21 is parallel to the length direction of the upper surface of the partition plate 1.

[0033] Combination Figure 1 and Figure 2 The lower end of the outer plate of the connecting plate 211 is spaced apart from the plate surface of the partition plate 1. The lower end of the outer plate of the connecting plate 211 is connected to the partition plate 1 through the support plate 22. The length direction of the support plate 22 is parallel to the length direction of the mounting part 21. The side wall of the support plate 22 is fixed to the plate surface of the connecting plate 211. The plate surface of the support plate 22 is perpendicular to the plate surface of the connecting plate 211. The side wall of the support plate 22 away from the connecting plate 211 is inclined to increase the contact area with the plate surface of the partition plate 1 and improve the stability of the connection.

[0034] Combination Figure 1 and Figure 2 A fixing plate 23 is detachably provided on the side of the load-bearing plate 212 away from the connecting plate 211. The fixing plate 23 is a strip-shaped metal plate. The length direction of the fixing plate 23 is parallel to the length direction of the mounting part 21. The surface of the fixing plate 23 abuts against the side wall of the load-bearing plate 212 away from the connecting plate 211. Multiple connecting holes 231 are spaced apart on the surface of the fixing plate 23 along its length direction. Bolt holes 2111 are provided at corresponding positions on the opposite surfaces of the connecting plate 211 and the fixing plate 23. The connecting holes 231 connect the two surfaces of the fixing plate 23. Connecting bolts 25 are inserted into the connecting holes 231. The ends of the connecting bolts 25 are threaded to the bolt holes 2111, connecting the fixing plate 23 and the mounting part 21.

[0035] Combination Figure 1 and Figure 2The sealing assembly 3 includes a sealing element 31 disposed between the connecting plate 211 and the fixed plate 23. The sealing element 31 is a square column, and its length direction is parallel to that of the mounting component 21. The two opposite side walls of the sealing element 31 slide against the opposite surfaces of the connecting plate 211 and the fixed plate 23, respectively. The side walls of the sealing element 31 can protrude from the side walls of the connecting plate 211 and the fixed plate 23 away from the force plate 212. Since the connecting plate 211 and the partition plate 1 are inclined, the side wall of the sealing element 31 is inclined away from the force plate 212. During the rotation of the rotor, when it passes the sector plate, the lower edge of the sector plate first contacts the inclined side wall of the sealing element 31 and compresses the sealing element 31 towards the force plate 212, so that the edge of the side wall of the sealing element 31 slides against the lower surface of the sector plate, thus sealing the air preheater.

[0036] Combination Figure 1 and Figure 2 Multiple strip-shaped sliding grooves 24 are provided on the opposite surfaces of the connecting plate 211 and the fixing plate 23. The multiple sliding grooves 24 are evenly distributed along the length direction of the mounting component 21, and the length direction of the sliding grooves 24 is perpendicular to the length direction of the mounting component 21. The sliding grooves 24 are spaced apart from the connecting holes 231 or bolt holes 2111. Sliding components 311 that are adapted to the sliding grooves 24 are provided on both sides of the sealing component 31 that are in contact with the surfaces of the connecting plate 211 and the fixing plate 23. The sliding components 311 are slidably disposed in the sliding grooves 24. The sliding grooves 24 are provided with openings on the side walls of the connecting plate 211 and the fixing plate 23 that are away from the force plate 212 to facilitate the installation of the sealing component 31.

[0037] Combination Figure 1 and Figure 2 Multiple limiting posts 32 are provided on the side wall of the sealing element 31 near the force plate 212. The limiting posts 32 are cylindrical, and their end faces are fixed to the side wall of the sealing element 31. A circular sliding hole is provided on the corresponding position of the surface of the force plate 212, connecting the two surfaces of the force plate 212. The limiting posts 32 are adapted to the sliding holes and slidably disposed within them, restricting the sliding trajectory of the sealing element 31. The limiting posts 32 are spaced apart from the connecting bolts 25. A spring 33 is provided between the sealing element 31 and the force plate 212. One end of the spring 33 abuts against the side wall of the sealing element 31, and the other end abuts against the surface of the force plate 212. The spring 33 provides elastic force to the sealing element 31, ensuring that the side wall of the sealing element 31 facing away from the force plate 212 remains in contact with the surface of the sector plate during the rotation of the air preheater rotor, thus reducing air leakage.

[0038] Combination Figure 1 and Figure 2The end face of the limiting post 32 away from the seal 31 is machined into a conical shape. The conical end allows the limiting post 32 to be positioned in the sliding hole more quickly, improving installation efficiency. A strip-shaped installation notch 321 is formed inward on the end face of the limiting post 32 away from the seal 31, and the length of the installation notch 321 is parallel to the axis of the limiting post 32. A flipping baffle 34 is rotatably mounted inside the installation notch 321 via a rotating shaft 35. The flipping baffle 34 is a strip-shaped metal plate that fits into the installation notch 321, and its surface remains parallel to the sidewall of the installation notch 321.

[0039] Combination Figure 1 and Figure 2 The rotating shaft 35 is cylindrical, with its conical end close to the shaft. The end of the rotating shaft 35 passes through a limiting post 32 and a flipping baffle 34. The axis of the rotating shaft 35 is perpendicular to the surface of the flipping baffle 34. Both ends of the rotating shaft 35 are flush with the opposing surfaces of the peripheral wall of the limiting post 32. When the limiting post 32 is inserted into the sliding hole, its conical end enters through one end of the sliding hole. The length direction of the flipping baffle is parallel to the axis of the limiting post 32. The opposing sidewalls of the flipping baffle 34 are flush with the edge of the sidewall of the mounting notch 321. When the mounting notch 321 is completely located on the side of the force plate 212 away from the seal 31, the flipping baffle 34 is rotated so that its length direction is perpendicular to the axis of the limiting post 32.

[0040] Combination Figure 1 and Figure 2 A limiting gasket 36 is provided between the flipping baffle 34 and the force-bearing plate 212. The limiting baffle is annular and the limiting gasket 36 is sleeved on the periphery of the limiting post 32. The inner periphery of the limiting gasket 36 slides and fits against the periphery of the limiting post 32. The side wall of the flipping baffle 34 can abut against the surface of the limiting gasket 36, and the surface of the limiting gasket 36 away from the flipping baffle 34 can abut against the surface of the force-bearing plate 212. The limiting gasket 36 can reduce the risk of the sealing member 31 disengaging from the mounting member 21 and the fixing plate 23 when it moves along the axis of the limiting post 32.

[0041] Combination Figure 1 and Figure 2 The four corners where the side wall of the flip-up baffle 34 intersects with the end face are all chamfered to facilitate the rotation of the flip-up baffle 34. The rotating shaft 35 is close to the bottom of the mounting notch 321. The connection position between the rotating shaft 35 and the flip-up baffle 34 is offset from the center of the flip-up baffle 34 plate surface, which allows the flip-up baffle 34 to hang down under its own weight. The side wall of the flip-up baffle 34 is offset from the peripheral wall of the limiting post 32 to block the limiting gasket 36, reducing the possibility of the limiting gasket 36 separating from the limiting post 32 during the sliding of the seal 31 and the limiting post 32.

[0042] Combination Figure 1 and Figure 2The upper end of the outer plate of the connecting plate 211 is fixed to the partition plate 1, and the lower end of the outer plate of the connecting plate 211 is connected to the partition plate 1 through the support plate 22. The sealing element 31 is set inside the mounting element 21, the limiting post 32 is slidably inserted in the sliding hole, the end of the spring 33 abuts against the side wall of the sealing element 31 and the plate surface of the force plate 212 respectively, the limiting gasket 36 is sleeved, the rotating baffle 34 is rotated to fix the position of the limiting post 32, the plate surface of the fixing plate 23 is attached to the side wall of the sealing element 31 and the side wall of the force plate 212, and fixed by the connecting bolt 25. The sliding element 311 is slidably set in the sliding groove 24 to reduce the possibility of the sealing element 31 moving along its length direction, thus completing the installation of the sealing device.

[0043] Combination Figure 1 and Figure 2 The sealing device can be detached and installed using connecting bolts 25 and flip-up baffles 34, facilitating subsequent inspection, maintenance, or replacement. The sidewalls of the fixing plate 23 and the connecting plate 211 away from the load-bearing plate 212 are both inclined and flush with the upper surface of the partition plate 1.

[0044] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An air preheater rotor sealing device, wherein the sealing device is disposed on the upper part of the compartment plate (1), characterized in that: The mounting component (21) comprises a connecting plate (211) and a load-bearing plate (212). The sidewall of the load-bearing plate (212) is fixedly connected to the lower part of the connecting plate (211), making the end face of the mounting component (21) L-shaped. The outer surface of the connecting plate (211) is fixedly connected to the upper part of the partition plate (1). The lower end of the outer surface of the connecting plate (211) is spaced apart from the partition plate (1). The connecting plate (211) is inclined, and the load-bearing plate (212) is away from the connecting plate (211). A fixing plate (23) is provided on one side, and the surface of the fixing plate (23) is opposite to the surface of the connecting plate (211). A sealing element (31) is slidably provided between the connecting plate (211) and the fixing plate (23). The surface of the fixing plate (23) is in contact with the side wall of the sealing element (31) and the side wall of the force plate (212). The side wall of the sealing element (31) away from the force plate (212) can protrude from the side wall of the connecting plate (211) and the fixing plate (23) away from the side wall of the force plate (212).

2. The air preheater rotor sealing device according to claim 1, characterized in that: The force-bearing plate (212) has a plurality of sliding holes evenly distributed on its surface. The sliding holes connect the two surfaces of the force-bearing plate (212). The sealing element (31) is fixed to the side wall opposite to the force-bearing plate (212) with a plurality of limiting posts (32). The axis of the limiting posts (32) is perpendicular to the side wall of the sealing element (31). The limiting posts (32) are adapted to the sliding holes and are slidably disposed in the sliding holes. A spring (33) is provided between the force-bearing plate (212) and the sealing element (31). The spring (33) is sleeved on the periphery of the limiting posts (32). One end of the spring (33) abuts against the side wall of the sealing element (31), and the other end of the spring (33) abuts against the surface of the force-bearing plate (212).

3. The air preheater rotor sealing device according to claim 2, characterized in that: The end face of the limiting post (32) away from the seal (31) is provided with an installation notch (321). A flipping baffle (34) is rotatably arranged in the installation notch (321) via a rotating shaft (35). The flipping baffle (34) can be completely located in the installation notch (321). A ring-shaped limiting gasket (36) is provided between the flipping baffle (34) and the force plate (212). The limiting gasket (36) is sleeved on the peripheral wall of the limiting post (32).

4. The air preheater rotor sealing device according to claim 2, characterized in that: The end face edge of the limiting post (32) away from the seal (31) is machined into a cone shape.

5. The air preheater rotor sealing device according to claim 3, characterized in that: The corners where the sidewall of the flipping baffle (34) intersects with the end face are all chamfered.

6. The air preheater rotor sealing device according to claim 1, characterized in that: The fixing plate (23) has a plurality of circular connecting holes (231) on its surface. The connecting holes (231) connect the two surfaces of the fixing plate (23). The connecting plate (211) has bolt holes (2111) at corresponding positions on the opposite surface of the fixing plate (23). A connecting bolt (25) passes through the connecting hole (231) and is threaded into the bolt hole (2111).

7. The air preheater rotor sealing device according to claim 6, characterized in that: The connecting plate (211) and the fixed plate (23) are provided with multiple sliding grooves (24) on their opposite surfaces. The length direction of the sliding groove (24) is perpendicular to the length direction of the connecting plate (211). The sliding groove (24) is provided with an opening on the side wall of the connecting plate (211) and the fixed plate (23) away from the force plate (212). The side wall of the sealing member (31) is provided with a sliding member (311) that is adapted to the sliding groove (24). The sliding member (311) is slidably disposed in the sliding groove (24).

8. The air preheater rotor sealing device according to claim 1, characterized in that: The lower end of the outer plate of the connecting plate (211) is connected to the partition plate (1) through the support plate (22). One side wall of the support plate (22) is fixed to the plate surface of the connecting plate (211), and the other side wall of the support plate (22) is inclined and fixed to the plate surface of the partition plate (1).

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