Sealing element of rotary air preheater and rotary air preheater

Abstract

The utility model relates to a sealing piece of a rotary air preheater and the rotary air preheater, the sealing piece comprises a rigid main body, a first sealing piece and a second sealing piece, the two opposite ends of the rigid main body in the first direction are provided with a first groove and a second groove respectively, and the notches of the first groove and the second groove are opposite; the first groove is used for being fixedly connected with the top end of the rotor bin dividing plate in an inserted mode, the second groove is provided with a first groove wall and a second groove wall which are opposite, and the distance between the first groove wall and the second groove wall is gradually reduced in the direction from the groove opening to the groove bottom of the second groove. The first sealing piece and the second sealing piece are both fixed to the rigid body, at least part of the first sealing piece is located in the second groove and forms a first flexible sealing part, at least part of the second sealing piece is located in the second groove and forms a second flexible sealing part, and the first flexible sealing piece and the second flexible sealing part are both used for abutting against the sector plate. The first flexible sealing part and the second flexible sealing part can deform when abutting against the fan-shaped plate and are pressed on the first groove wall and the second groove wall respectively.

Description

Technical Field

[0001] The present disclosure relates to a rotary air preheater, and in particular to a seal of a rotary air preheater and a rotary air preheater. Background Art

[0002] In thermal power plants, there is waste heat in the flue gas. If the flue gas is discharged directly, this heat will be wasted. In order to recover the waste heat of the flue gas, an air preheater is usually required to recycle the heat in the flue gas.

[0003] In the existing rotary air preheater, the sealing effect of the seals at the rotor compartment plate and the sector plate is poor, and air leakage still occurs, which affects the heat exchange efficiency of the rotary air preheater. Utility Model Content

[0004] The purpose of the present disclosure is to provide a rotary air preheater seal and a rotary air preheater to solve the technical problem of poor sealing effect between the rotor compartment plate and the sector plate of the existing rotary air preheater.

[0005] To achieve the above objectives, the present disclosure provides, in a first aspect, a seal for a rotary air preheater, for being disposed between a rotor compartment plate and a sector plate of the rotary air preheater, the seal comprising: a rigid body, a first sealing sheet, and a second sealing sheet, wherein opposite ends of the rigid body in a first direction are respectively provided with a first groove and a second groove with opposite notches, the first groove being used for being plugged and fixed with the top end of the rotor compartment plate, the second groove having a first groove wall and a second groove wall opposite to each other, the spacing between the first groove wall and the second groove wall gradually decreasing along the direction from the notch to the bottom of the second groove; the first sealing sheet and the second sealing sheet are both fixed to the rigid body, at least a portion of the first sealing sheet is located in the second groove and constitutes a first flexible sealing portion, and at least a portion of the second sealing sheet is located in the second groove and constitutes a second flexible sealing portion, the first flexible sealing portion being disposed near the first groove wall, and the second flexible sealing portion being disposed near the second groove wall; wherein the first flexible sealing portion and the second flexible sealing portion are both used to abut against the sector plate, and the first flexible sealing portion and the second flexible sealing portion can be deformed and pressed against the first groove wall and the second groove wall, respectively, when abutting against the sector plate.

[0006] Optionally, the rigid body includes a base and a first support plate and a second support plate fixed on opposite sides of the base, the first groove is formed on the base, the first support plate, the second support plate and the end of the base facing away from the first groove together enclose the second groove, at least part of the first support plate constitutes the first groove wall, and at least part of the second support plate constitutes the second groove wall.

[0007] Optionally, one end of the first sealing sheet is fixed between the first support plate and the base, and the other end of the first sealing sheet extends into the second groove to form the first flexible sealing portion; one end of the second sealing sheet is fixed between the second support plate and the base, and the other end of the second sealing sheet extends into the second groove to form the second flexible sealing portion.

[0008] Optionally, a first sealing protrusion is provided on a side of the first flexible sealing portion facing the first groove wall, the first sealing protrusion extends along a second direction, the second direction is perpendicular to the first direction, and the first sealing protrusion is suitable for crimping and sealing on the first groove wall.

[0009] Optionally, there are multiple first sealing protrusions, and the multiple first sealing protrusions are arranged in parallel and at intervals along the first direction. The multiple first sealing protrusions and the first flexible sealing portion form a labyrinth sealing structure.

[0010] Optionally, the surface of the first sealing protrusion facing the first groove wall is an arc surface.

[0011] Optionally, a second sealing protrusion is provided on the side of the second flexible sealing portion facing the second groove wall, the second sealing protrusion extends along a second direction, the second direction is perpendicular to the first direction, and the second sealing protrusion is suitable for crimping and sealing on the second groove wall.

[0012] Optionally, there are multiple second sealing protrusions, and the multiple second sealing protrusions are arranged in parallel and at intervals along the first direction. The multiple second sealing protrusions and the second flexible sealing portion form a labyrinth sealing structure.

[0013] Optionally, a surface of the second sealing protrusion facing the second groove wall is an arc surface.

[0014] In a second aspect, the present disclosure provides a rotary air preheater, which includes a rotor partition plate, a fan-shaped plate and the above-mentioned seal. The seal is clamped to the top end of the rotor partition plate through the first groove, and the fan-shaped plate presses against the first flexible sealing part and the second flexible sealing part of the seal, and presses the first flexible sealing part and the second flexible sealing part against the first groove wall and the second groove wall respectively.

[0015] Through the above technical solution, the seal is applied to the rotary air preheater, and the rigid body can be plugged and fixed on the top of the rotor partition plate through the first groove, thereby achieving relative fixation with the rotor partition plate. The fan-shaped plate provides pressure to the rigid body, so that the bottom of the first groove and the end face of the top of the rotor partition plate are pressed and sealed. The first sealing sheet undergoes elastic deformation under the pressure of the fan-shaped plate and is pressed between the first groove wall and the fan-shaped plate, thereby sealing the gap between the first groove wall and the fan-shaped plate. Similarly, the second sealing sheet undergoes elastic deformation under the pressure of the fan-shaped plate and is pressed between the second groove and the fan-shaped plate, thereby sealing the gap between the second groove wall and the fan-shaped plate. In this way, a double sealing structure is formed for the fan-shaped plate, which solves the technical problem of the contact gap between the rotor partition plate and the fan-shaped plate of the existing rotary air preheater.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0018] Figure 1 1 is a schematic structural diagram of a seal of a rotary air preheater provided in an exemplary embodiment of the present disclosure.

[0019] Description of Reference Numerals

[0020] 10-seal; 20-rotor compartment plate;

[0021] 100 - rigid body; 101 - first groove; 102 - second groove; 103 - first groove wall; 104 - second groove wall; 110 - base; 120 - first support plate; 130 - second support plate;

[0022] 200 - first sealing sheet; 210 - first flexible sealing portion; 220 - first sealing protrusion;

[0023] 300 - second sealing sheet; 310 - second flexible sealing portion; 320 - second sealing protrusion. DETAILED DESCRIPTION

[0024] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0025] In the description of this disclosure, it should be understood that the terms "inside" and "outside" refer to the inside and outside of the corresponding structural outline. In addition, the terms "first" and "second" are only used to distinguish one element from another and do not have order or importance.

[0026] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections via an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0027] In the related art, the gap between the rotor compartment plate and the fan plate of the rotary air preheater is usually sealed by a brush, but this method has a poor sealing effect and air leakage still occurs, affecting the heat exchange efficiency of the rotary air preheater.

[0028] In view of this, the present disclosure provides a rotary air preheater seal for being arranged between the rotor compartment plate and the fan plate of the rotary air preheater, such as Figure 1 As shown, the seal 10 includes a rigid body 100, a first sealing sheet 200 and a second sealing sheet 300. The rigid body 100 is provided with a first groove 101 and a second groove 102 with opposite notches at opposite ends in the first direction. The first groove 101 is used to be plugged and fixed with the top end of the rotor compartment plate. The second groove 102 has a first groove wall 103 and a second groove wall 104 opposite to each other. Along the notch of the second groove 102 to the groove bottom, the distance between the first groove wall 103 and the second groove wall 104 gradually decreases; the first sealing sheet 200 and the second sealing sheet 300 are both fixed to the rigid body 100, at least Part of the first sealing sheet 200 is located in the second groove 102 to form a first flexible sealing portion 210, and at least part of the second sealing sheet 300 is located in the second groove 102 to form a second flexible sealing portion 310. The first flexible sealing portion 210 is arranged close to the first groove wall 103, and the second flexible sealing portion 310 is arranged close to the second groove wall 104. The first flexible sealing portion 210 and the second flexible sealing portion 310 are both used to abut against the fan-shaped plate, and the first flexible sealing portion 210 and the second flexible sealing portion 310 can be deformed and pressed against the first groove wall 103 and the second groove wall 104 respectively when abutting against the fan-shaped plate.

[0029] Through the above solution, seal 10 is applied to a rotary air preheater. Rigid body 100 can be inserted and fixed to the top of the rotor compartment plate via first groove 101, achieving relative fixation with the rotor compartment plate. The sector plate applies pressure to rigid body 100, forcing the bottom of first groove 101 into contact with the end surface of the top of the rotor compartment plate, creating a seal. After the first sealing portion 210 is pressed against the fan plate, it is elastically deformed under the pressure of the fan plate and is pressed between the first groove wall 103 and the fan plate, thereby sealing the gap between the first groove wall 103 and the fan plate through the first sealing portion 210. Similarly, after the second flexible sealing portion 310 is pressed against the fan plate, it is elastically deformed under the pressure of the fan plate and is pressed between the second groove 102 and the fan plate, thereby sealing the gap between the second groove wall 104 and the fan plate through the second flexible sealing portion 310. In this way, a double sealing structure is formed between the fan plate and the first groove wall 103 and the second groove wall 104 through the first flexible sealing portion 210 and the second flexible sealing portion 310, thereby solving the technical problem of poor sealing effect between the rotor compartment plate and the fan plate of the existing rotary air preheater.

[0030] It should be noted that the width of the first groove 101 is adapted to the thickness of the rotor compartment plate, so that the groove wall of the first groove 101 can fit with the plate surface of the rotor compartment plate, so that the rigid body 100 and the rotor compartment plate are relatively fixed after being plugged in.

[0031] In some optional embodiments, a third sealing sheet is provided at the bottom of the first groove 101, and the third sealing sheet is crimped between the end face of the rotor compartment plate and the bottom of the first groove 101, which can further improve the sealing performance between the rigid body 100 and the rotor compartment plate.

[0032] like Figure 1 As shown, in some optional embodiments, the rigid body 100 includes a base 110 and a first support plate 120 and a second support plate 130 fixed on opposite sides of the base 110. A first groove 101 is provided at the first end of the base 110. The first groove 101 is formed on the base. The first support plate 120, the second support plate 130 and the end of the base 110 facing away from the first groove 101 together enclose a second groove 102. At least a portion of the first support plate 120 constitutes a first groove wall 103, and at least a portion of the second support plate 130 constitutes a second groove wall 104.

[0033] The first groove 101 is formed on the base 110 so that the groove wall and the groove bottom of the first groove 101 are both formed by the base 110, thereby enhancing the strength of the first groove 101 and ensuring that the relative groove walls of the first groove 101 are parallel to each other so as to be compatible with the rotor compartment plate. Furthermore, when the first groove 101 is clamped on the rotor compartment plate, the connection stability between the rigid body 100 and the rotor compartment plate can be enhanced. Since the first support plate 120 and the second support plate 130 are separate plates, they can be processed separately before being fixed to the base 110, making the processing of the first support plate 120 and the second support plate 130 more convenient. For example, the portion of the first support plate 120 that constitutes the first groove wall 103 is bent, and the portion of the second support plate 130 that constitutes the second groove wall 104 is bent, so that the distance between the first groove wall 103 and the second groove wall 104 is gradually reduced along the direction from the notch of the second groove 102 to the groove bottom. At the same time, it is also convenient to install and fix the first sealing sheet 200 and the second sealing sheet 300 on the base 110 .

[0034] It should be noted that the fixing method between the first support plate 120 and the base 110 includes but is not limited to bolt connection and welding.

[0035] like Figure 1 As shown, in some optional embodiments, one end of the first sealing sheet 200 is fixed between the first support plate 120 and the base 110, and the other end of the first sealing sheet 200 extends into the second groove 102 to form a first flexible sealing portion 210, and one end of the second sealing sheet 300 is fixed between the second support plate 130 and the base 110, and the other end of the second sealing sheet 300 extends into the second groove 102 to form a second flexible sealing portion 310.

[0036] By placing the first sealing sheet 200 between the first support plate 120 and the base 110, the first sealing sheet 200 can be simultaneously secured by fixing the first support plate 120 to the base 110. Similarly, by placing the second sealing sheet 300 between the second support plate 130 and the base 110, the second sealing sheet 300 can be simultaneously secured by fixing the second support plate 130 to the base 110. This not only enhances the stability of the first and second sealing sheets 200 and 300 after they are secured, but also simplifies the installation steps of the sealing member 10, eliminating the need to secure the first and second sealing sheets 200 and 300 separately.

[0037] In some optional embodiments, a first sealing protrusion 220 is provided on the side of the first flexible sealing portion 210 facing the first groove wall 103 , and the first sealing protrusion 220 extends along a second direction perpendicular to the first direction, and the first sealing protrusion 220 is suitable for crimping and sealing on the first groove wall 103 .

[0038] The first sealing protrusion 220 is extended along the second direction so that the first sealing protrusion 220 can adapt to the length of the rotor partition plate in the radial direction of the rotor. When the seal 10 is used in the rotary air preheater, the first sealing protrusion 220 can be pressed between the first flexible sealing portion 210 and the first groove wall 103. Since the first sealing protrusion 220 is a protruding structure protruding from the surface of the first flexible sealing portion 210, it has a larger deformation activity area during the pressing process, thereby achieving better contact between the first sealing protrusion 220 and the first groove wall 103 to achieve sealing.

[0039] In some optional embodiments, there are multiple first sealing protrusions 220 , and the multiple first sealing protrusions 220 are arranged in parallel and at intervals along the first direction. The multiple first sealing protrusions 220 and the first flexible sealing portion 210 form a labyrinth sealing structure.

[0040] The multiple first sealing protrusions 220 can be pressed against the first groove wall 103, so that the first flexible sealing portion 210, the first groove wall 103 and the multiple first seals together form multiple spaced cavities, constituting the above-mentioned labyrinth sealing structure to enhance the sealing performance.

[0041] In some optional embodiments, the surface of the first sealing protrusion 220 facing the first support plate 120 is an arc surface. When the first sealing protrusion 220 is pressed against the first groove wall 103 formed by the first support plate 120, the arc surface is flattened to better contact and seal with the first support plate 120.

[0042] In some optional embodiments, a second sealing protrusion 320 is provided on a side of the second flexible sealing portion 310 facing the second groove wall 104. The second sealing protrusion 320 extends along a second direction that is perpendicular to the first direction, and the second sealing protrusion 320 is adapted to be crimped and sealed against the second groove wall 104. The second sealing protrusion 320 protrudes from the surface of the second flexible sealing portion 310 to form a raised structure. The second sealing protrusion 320 can be compressed between the second flexible sealing portion 310 and the second groove wall 104, thereby achieving a line contact seal between the second sealing protrusion 320 and the second groove wall 104.

[0043] To enhance the sealing effect of the second sealing sheet 300, in some optional embodiments, multiple second sealing protrusions 320 are provided. These multiple second sealing protrusions 320 are arranged parallel and spaced apart along the first direction. The multiple second sealing protrusions 320 and the second flexible sealing portion 310 form a labyrinth seal structure. This labyrinth seal structure, formed when the multiple second sealing protrusions 320 are pressed against the second support plate 130, can enhance the sealing effect of the second sealing sheet 300 on the gap between the rotor compartment plate and the sector plate.

[0044] In some optional embodiments, the surface of the first sealing protrusion 220 facing the second groove wall 104 is an arc surface. When the second sealing protrusion 320 is pressed against the second groove wall 104 formed by the second support plate 130, the arc surface of the second sealing protrusion 320 is flattened to better contact and seal with the two support plates.

[0045] Based on the above-mentioned seal 10, the present disclosure provides a rotary air preheater in the second aspect, which includes a rotor partition plate, a fan-shaped plate and the above-mentioned seal 10. The seal 10 is clamped to the top end of the rotor partition plate through the first groove 101, and the fan-shaped plate abuts the first flexible sealing part 210 and the second flexible sealing part 310 of the seal 10, and presses the first flexible sealing part 210 and the second flexible sealing part 310 onto the first groove wall 103 and the second groove wall 104 respectively.

[0046] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0048] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A seal for a rotary air preheater, used to be arranged between a rotor compartment plate and a sector plate of the rotary air preheater, characterized in that: The sealing member comprises: A rigid body, wherein the rigid body is provided with a first groove and a second groove with opposite notches at opposite ends in a first direction, the first groove being used for plugging and fixing with the top end of the rotor compartment plate, and the second groove having a first groove wall and a second groove wall facing each other, and the distance between the first groove wall and the second groove wall gradually decreases along the direction from the notch to the bottom of the second groove; a first sealing sheet and a second sealing sheet, both fixed to the rigid body, at least a portion of the first sealing sheet being located in the second groove and constituting a first flexible sealing portion, at least a portion of the second sealing sheet being located in the second groove and constituting a second flexible sealing portion, the first flexible sealing portion being disposed close to the first groove wall, and the second flexible sealing portion being disposed close to the second groove wall; Wherein, the first flexible sealing portion and the second flexible sealing portion are both used to abut against the fan-shaped plate, and the first flexible sealing portion and the second flexible sealing portion can be deformed and pressed against the first groove wall and the second groove wall respectively when abutting against the fan-shaped plate.

2. The seal according to claim 1, wherein: The rigid body includes a base and a first support plate and a second support plate fixed on opposite sides of the base. The first groove is formed on the base. The first support plate, the second support plate and an end of the base facing away from the first groove together enclose the second groove. At least a portion of the first support plate constitutes the first groove wall, and at least a portion of the second support plate constitutes the second groove wall.

3. The seal according to claim 2, characterized in that One end of the first sealing sheet is fixed between the first support plate and the base, and the other end of the first sealing sheet extends into the second groove to form the first flexible sealing portion. One end of the second sealing sheet is fixed between the second support plate and the base, and the other end of the second sealing sheet extends into the second groove to form the second flexible sealing portion.

4. The seal according to any one of claims 1 to 3, characterized in that A first sealing protrusion is provided on the side of the first flexible sealing portion facing the first groove wall. The first sealing protrusion extends along a second direction which is perpendicular to the first direction. The first sealing protrusion is suitable for being crimped and sealed on the first groove wall.

5. The seal according to claim 4, characterized in that There are multiple first sealing protrusions, and the multiple first sealing protrusions are arranged in parallel and at intervals along the first direction. The multiple first sealing protrusions and the first flexible sealing portion form a labyrinth sealing structure.

6. The seal according to claim 4, characterized in that The surface of the first sealing protrusion facing the first groove wall is an arc surface.

7. The sealing element according to any one of claims 1 to 3, characterized in that: A second sealing protrusion is provided on the side of the second flexible sealing portion facing the second groove wall. The second sealing protrusion extends along a second direction which is perpendicular to the first direction. The second sealing protrusion is suitable for being crimped and sealed on the second groove wall.

8. The seal according to claim 7, characterized in that There are multiple second sealing protrusions, and the multiple second sealing protrusions are arranged in parallel and at intervals along the first direction. The multiple second sealing protrusions and the second flexible sealing portion form a labyrinth sealing structure.

9. The seal according to claim 7, wherein: The surface of the second sealing protrusion facing the second groove wall is an arc surface.

10. A rotary air preheater, characterized in that: It includes a rotor partition plate, a fan-shaped plate and a seal as described in any one of claims 1 to 9, wherein the seal is clamped to the top end of the rotor partition plate through the first groove, and the fan-shaped plate presses against the first flexible sealing part and the second flexible sealing part of the seal, and presses the first flexible sealing part and the second flexible sealing part onto the first groove wall and the second groove wall respectively.

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