Heavy vertical floating type sealing structure for air pre-heater

Abstract

The utility model discloses a heavy drooping floating type sealing structure for an air pre-heater, which comprises a rotor partition plate, a hard sealing fin is fixedly connected to the plate surface of one side of the rotor partition plate, a heavy drooping self-compensation sealing assembly is fixedly connected to the plate surface of the other side of the rotor partition plate, and the heavy drooping self-compensation sealing assembly comprises a heavy drooping self-compensation sealing pressing plate and a sealing plate. The bottom end of the weight self-compensation sealing plate is rotationally connected with a weight self-compensation sealing piece, the bottom end of the weight self-compensation sealing piece is fixedly connected with a gravity block, and the bottom end of the gravity block is lower than the bottom end of the hard sealing piece. According to the utility model, a conventional gap is kept between the hard sealing sheets on one side of the rotor partition plate, the other side of the rotor partition plate is in floating contact with the sector plate by virtue of gravity through the weight self-compensation sealing sheets, and the weight self-compensation sealing sheets can automatically adapt to the gap between the sector plate through rotation, so that the relative sealing requirement can be met, and the sealing effect is good due to the gravity self-drooping principle. Friction force is reduced, and the fan-shaped plate cannot be excessively abraded.

Description

TECHNICAL FIELD

[0001] The utility model relates to air preheater sealing technical field, especially relate to a kind of for air preheater's heavy vertical floating type sealing structure. BACKGROUND

[0002] Air preheater is a kind of preheating equipment for improving steam boiler heat exchange performance and reducing heat loss in thermal power plant, and air preheater is generally composed of rotor and shell, and the rotor divides air preheater into two parts of flue gas side and air side.Leakage of air preheater is divided into direct leakage and entrainment leakage: entrainment leakage is inevitable, which is caused by the air carried by the cavity of rotating rotor when it passes through air side and then goes to flue gas side: direct leakage is that flue gas side is under negative pressure, and air side is under positive pressure, so under the action of pressure difference, air leaks to flue gas through the gap between rotor and stator directly.Therefore, reducing the sealing gap causing leakage is the main way to reduce the leakage of air preheater.

[0003] Due to the special working condition of air preheater and the influence of thermal expansion and contraction of rotor and fan-shaped plate, the rotor deforms in mushroom shape during actual operation, as shown in the drawings. Figure 3 As shown in the drawings, the rotor deforms during actual operation of air preheater, and conventional sealing system uses a hard seal fixed on rotor partition, which calculates the subsidence amount of rotor under heat in advance, and reserves a certain "safety gap" at the same time, so that the gap at cold end (lower part) decreases after the subsidence of rotor under heat, but if the sealing gap is reserved too small, it will appear jammed, and if the safety distance is reserved too large, the leakage rate will increase. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of heavy vertical floating type sealing structure for air preheater, which is designed as heavy vertical floating type sealing structure by radial sealing at cold end, i.e.the hard sealing piece on one side of rotor partition keeps conventional gap, and the other side contacts fan-shaped plate by gravity floating through heavy vertical self-compensation sealing piece, and heavy vertical self-compensation sealing piece can automatically adapt the gap between fan-shaped plate by rotating, which can not only meet the requirement of relative sealing, but also reduce friction due to gravity self-vertical principle, and will not cause excessive wear of fan-shaped plate.

[0005] In order to realize the purpose of the utility model, the utility model provides a kind of heavy vertical floating type sealing structure for air preheater, comprising: rotor partition plate, one side plate surface of the rotor partition plate is fixedly connected with hard sealing pressing plate, the inner side of the hard sealing pressing plate is fixedly connected with hard sealing sheet, the other side plate surface of the rotor partition plate is fixedly connected with heavy vertical self-compensation sealing assembly, the heavy vertical self-compensation sealing assembly includes: guard plate, the guard plate is installed in the rotor partition plate far from hard sealing sheet end plate surface, the outer side of the guard plate is equipped with heavy vertical self-compensation sealing pressing plate, heavy vertical self-compensation sealing sheet is rotatably connected at the bottom end of the heavy vertical self-compensation sealing pressing plate, the bottom end of the heavy vertical self-compensation sealing sheet is fixedly connected with gravity block, and the bottom end height of the gravity block is lower than the bottom end of the hard sealing sheet setting, the bottom end plate surface of the rotor partition plate is rotatably connected with screw rod, the hard sealing pressing plate, hard sealing sheet, guard plate and heavy vertical self-compensation sealing pressing plate are all installed on the screw rod.

[0006] As the preferred technical scheme of the utility model, the bottom end of the hard sealing sheet is provided with bending structure, the bending direction of the hard sealing sheet is matched with the advancing direction of the sector plate, and the bottom end height of the hard sealing sheet is matched with the top surface height of the sector plate.

[0007] As the preferred technical scheme of the utility model, the outer side of the hard sealing pressing plate is provided with nut and gasket, the gasket is clamped between the nut and the hard sealing pressing plate, and the nut is threadedly connected with the screw rod for limiting and fixing.

[0008] As the preferred technical scheme of the utility model, the end plate surface of the rotor partition plate far from the hard sealing sheet is provided with nut and gasket, the gasket is clamped between the nut and the rotor partition plate, and the nut is threadedly connected with the screw rod for limiting and fixing.

[0009] As the preferred technical scheme of the utility model, the guard plate is provided with straight-angle bending structure, the horizontal section length of the guard plate is matched with the thickness of the nut and gasket, so that the inner side plate surface of the vertical section of the guard plate is matched with the outer side surface of the nut.

[0010] As the preferred technical scheme of the utility model, the outer side of the heavy vertical self-compensation sealing pressing plate is provided with nut and gasket, the gasket is clamped between the nut and the heavy vertical self-compensation sealing pressing plate, and the nut is threadedly connected with the screw rod for limiting and fixing.

[0011] As the preferred technical scheme of the utility model, the top end of the heavy vertical self-compensation sealing sheet is rotatably connected to the bottom end of the heavy vertical self-compensation sealing pressing plate through rotating shaft.

[0012] Compared with the prior art, the utility model provides a kind of heavy vertical floating type sealing structure for air preheater, with the following beneficial effects:

[0013] The utility model discloses a heavy vertical floating type sealing structure is designed to the cold end radial seal, that is, the hard sealing sheet of one side of rotor partition board keeps the conventional gap, and the other side is contacted with the fan-shaped plate by the gravity floating of heavy vertical self-compensation sealing sheet, and the heavy vertical self-compensation sealing sheet can automatically adapt the gap between the fan-shaped plate by rotating. Before entering the fan-shaped plate, the gravity block is affected by gravity, and the heavy vertical self-compensation sealing sheet keeps the vertical state, when entering the fan-shaped plate, the gravity block and the lower fan-shaped plate are directly contacted to realize relative sealing, when the rotor is deformed and sinks, the gravity block is tightly attached to the fan-shaped plate surface by the effect of rotating shaft and floats up, and the jamming phenomenon and the "safety gap" air leakage do not appear, the utility model discloses can reach relative sealing requirement, and can infinitely reduce the sealing gap, due to the gravity self-vertical principle, the friction is reduced, and the fan-shaped plate is not excessively abraded, and the gravity self-vertical principle is adopted, and the self-compensation purpose is realized. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the initial state structure schematic drawing of the utility model,

[0015] Figure 2 It is the structure schematic drawing of entering the fan-shaped plate state of the utility model,

[0016] Figure 3 It is the structure schematic drawing of the rotor deformation of the air preheater of the utility model.

[0017] 1 is the rotor partition board, 2 is the hard sealing pressing plate, 3 is the hard sealing sheet, 4 is the guard plate, 5 is the heavy vertical self-compensation sealing pressing plate, 6 is the heavy vertical self-compensation sealing sheet, 7 is the rotating shaft, 8 is the gravity block, 9 is the screw rod, 10 is the nut, 11 is the gasket, 12 is the fan-shaped plate, 13 is the rotor. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0019] Please refer to Figures 1-3The utility model discloses an embodiment provides a kind of heavy vertical floating type sealing structure for air preheater, comprising: rotor partition board 1, one side board surface of the rotor partition board 1 is fixedly connected with hard sealing pressing plate 2, the inboard of hard sealing pressing plate 2 is fixedly connected with hard sealing piece 3, the other side board surface of the rotor partition board 1 is fixedly connected with heavy vertical self-compensation sealing assembly, and the heavy vertical self-compensation sealing assembly includes: guard plate 4, the guard plate 4 is installed on the end board surface of the rotor partition board 1 away from hard sealing piece 3, the outside of the guard plate 4 is installed with heavy vertical self-compensation sealing pressing plate 5, and the bottom end of the heavy vertical self-compensation sealing pressing plate 5 is rotatably connected with heavy vertical self-compensation sealing piece 6, the bottom end of the heavy vertical self-compensation sealing piece 6 is fixedly connected with gravity block 8, and the bottom end height of the gravity block 8 is lower than the bottom end of the hard sealing piece 3 setting, the bottom end board surface of the rotor partition board 1 is connected with screw rod 9, and the hard sealing pressing plate 2, hard sealing piece 3, guard plate 4 and heavy vertical self-compensation sealing pressing plate 5 are all installed on the screw rod 9.

[0020] In an embodiment of the utility model, the bottom end of hard sealing piece 3 is bent structure, the bending direction of hard sealing piece 3 is adapted to the direction of fan-shaped plate 12, and the bottom end height of hard sealing piece 3 is adapted to the top height of fan-shaped plate 12.

[0021] In an embodiment of the utility model, the outside of hard sealing pressing plate 2 is provided with nut 10 and gasket 11, gasket 11 is clamped between nut 10 and hard sealing pressing plate 2, and nut 10 is threadedly connected with screw rod 9 for limiting and fixing.

[0022] In an embodiment of the utility model, the end board surface of the rotor partition board 1 away from hard sealing piece 3 is provided with nut 10 and gasket 11, gasket 11 is clamped between nut 10 and the rotor partition board 1, and nut 10 is threadedly connected with screw rod 9 for limiting and fixing.

[0023] In an embodiment of the utility model, the guard plate 4 is set as right-angle bending structure, the horizontal length of guard plate 4 is adapted to the thickness of nut 10 and gasket 11, so that the inside board surface of the vertical section of guard plate 4 is attached to the outside surface of nut 10.

[0024] In an embodiment of the utility model, the outside of heavy vertical self-compensation sealing pressing plate 5 is provided with nut 10 and gasket 11, gasket 11 is clamped between nut 10 and heavy vertical self-compensation sealing pressing plate 5, and nut 10 is threadedly connected with screw rod 9 for limiting and fixing.

[0025] In an embodiment of the utility model, the top end of heavy vertical self-compensation sealing piece 6 is rotatably connected to the bottom end of heavy vertical self-compensation sealing pressing plate 5 through rotating shaft 7.

[0026] The above merely is the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited to this, any skilled person in the technical field according to the technical scheme and the utility model concept of the present utility model within the technical range disclosed by the present utility model makes equivalent replacement or change, should be covered in the protection scope of the present utility model.

Claims

1. A gravity-floating sealing structure for an air preheater, characterized in that, include: A rotor compartment plate (1) has a hard sealing pressure plate (2) fixedly connected to one side of the rotor compartment plate (1), a hard sealing sheet (3) fixedly connected to the inner side of the hard sealing pressure plate (2), and a self-compensating sag sealing assembly fixedly connected to the other side of the rotor compartment plate (1). The self-compensating sag sealing assembly includes a guard plate (4), which is installed on the end plate of the rotor compartment plate (1) away from the hard sealing sheet (3). A self-compensating sag sealing pressure plate (5) is installed on the outer side of the guard plate (4). The bottom end of the self-compensating sealing plate (5) is rotatably connected to a self-compensating sealing sheet (6), and the bottom end of the self-compensating sealing sheet (6) is fixedly connected to a gravity block (8). The bottom end of the gravity block (8) is lower than the bottom end of the hard sealing sheet (3). The rotor compartment plate (1) is connected to a screw (9) through the bottom plate surface. The hard sealing plate (2), hard sealing sheet (3), guard plate (4) and self-compensating sealing plate (5) are all installed on the screw (9).

2. The gravity-floating sealing structure for an air preheater according to claim 1, characterized in that: The bottom end of the hard sealing sheet (3) is provided with a bent structure. The bending direction of the hard sealing sheet (3) is adapted to the traveling direction of the fan-shaped plate (12), and the bottom height of the hard sealing sheet (3) is adapted to the top surface height of the fan-shaped plate (12).

3. The gravity-floating sealing structure for an air preheater according to claim 1, characterized in that: The hard sealing plate (2) is provided with a nut (10) and a washer (11) on the outside. The washer (11) is sandwiched between the nut (10) and the hard sealing plate (2). The nut (10) is threadedly connected to the screw (9) for limiting and fixing.

4. The gravity-floating sealing structure for an air preheater according to claim 1, characterized in that: The rotor compartment plate (1) is provided with a nut (10) and a washer (11) on the end plate surface away from the hard sealing sheet (3). The washer (11) is sandwiched between the nut (10) and the rotor compartment plate (1). The nut (10) is threadedly connected to the screw (9) for limiting and fixing.

5. A gravity-floating sealing structure for an air preheater according to claim 4, characterized in that: The guard plate (4) is configured as a right-angle bent structure. The length of the horizontal section of the guard plate (4) is adapted to the thickness of the nut (10) and the washer (11), so that the inner side of the vertical section of the guard plate (4) is attached to the outer side of the nut (10).

6. The gravity-floating sealing structure for an air preheater according to claim 1, characterized in that: The outer side of the self-compensating sealing pressure plate (5) is provided with a nut (10) and a washer (11). The washer (11) is sandwiched between the nut (10) and the self-compensating sealing pressure plate (5). The nut (10) is threadedly connected to the screw (9) for limiting and fixing.

7. A gravity-floating sealing structure for an air preheater according to claim 1, characterized in that: The top end of the self-compensating sealing sheet (6) is rotatably connected to the bottom end of the self-compensating sealing pressure plate (5) via a rotating shaft (7).

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