Sealing structure of rotary air preheater

Abstract

The utility model provides a sealing structure of a rotary air preheater, and belongs to the technical field of air preheaters. The rotary air preheater sealing structure comprises an air preheater body and a lifting structure, the air preheater body comprises a shell, a main shaft, a connecting plate, an upper sector plate, a lower sector plate, a rotor and a sealing piece, the main shaft is connected with the shell, the connecting plate is connected with the main shaft, the upper sector plate is hinged to the connecting plate, the lower sector plate is hinged to the rotor, and the lifting structure is connected with the shell. The lower sector plate is connected with the main shaft, and the rotor is connected with the main shaft. According to the sealing structure of the rotary air preheater, the height of the upper sector plate can be conveniently adjusted, the problem that the area of a triangular air leakage area is increased after the sealing piece is continuously abraded is solved, the area of the triangular air leakage area is kept in a stable interval, then it is guaranteed that the air leakage amount is kept in a stable area, and the energy consumption utilization efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of air preheaters, and in particular to a sealing structure of a rotary air preheater. Background Art

[0002] Air preheater is generally referred to as air preheater. It is mostly used in coal-fired power station boilers. It can be divided into two types: tube box type and rotary type. The rotary type is further divided into wind hood rotary type and heating surface rotary type. Power station boilers often use heating surface rotary preheater. The application in boilers is generally two-compartment, three-compartment, and four-compartment types, among which the four-compartment type is more commonly used in circulating fluidized bed boilers.

[0003] The existing rotary air preheater is a fixed sealing plate. After adjustment, the sealing plate is fixed in position and the distance between it and the compartment fan plate is kept fixed. The air leakage is large, which causes serious damage to the shell and outer edge of the rotary air preheater, resulting in heat loss with high energy consumption. Utility Model Content

[0004] In order to remedy the above deficiencies, the present application provides a rotary air preheater sealing structure, which aims to improve the problem of fixed distance between the fan plate and the sealing plate assembly, large air leakage, and heat loss resulting in high energy consumption.

[0005] An embodiment of the present application provides a rotary air preheater sealing structure, including an air preheater body and a lifting structure, the air preheater body including a shell, a main shaft, a connecting plate, an upper fan-shaped plate, a lower fan-shaped plate, a rotor and a sealing plate, the main shaft is connected to the shell, the connecting plate is connected to the main shaft, the upper fan-shaped plate is hinged to the connecting plate, the lower fan-shaped plate is connected to the main shaft, the rotor is connected to the main shaft, and the sealing plate is connected to the main shaft, the lifting structure includes a reciprocating sliding assembly, a connecting rod, a rotating rod and a mounting plate, the reciprocating sliding assembly is arranged on one side of the shell, the connecting rod is connected to the reciprocating sliding assembly, both ends of the rotating rod are hinged to the connecting rod and the mounting plate respectively, and the mounting plate is connected to the upper fan-shaped plate.

[0006] In a specific embodiment, the reciprocating sliding assembly includes a rectangular frame, a servo motor, a ball screw pair and a screw nut pair. The rectangular frame is arranged on one side of the shell, the servo motor is installed on one side of the rectangular frame, the ball screw pair is connected to the servo motor, the ball screw pair is rotatably connected to the rectangular frame, the screw nut pair is connected to the ball screw pair, and the connecting rod is connected to the screw nut pair.

[0007] In the above implementation process, through the setting of the rectangular frame, servo motor, ball screw pair and screw nut pair, it is convenient to drive the upper fan plate to move, and it is convenient to adjust the height of the upper fan plate, so as to compensate for the problem of the increase in the area of ​​the triangular air leakage area after continuous wear of the sealing plate, so that the area of ​​the triangular air leakage area is maintained in a stable range, thereby ensuring that the air leakage volume remains in a stable area and improving energy consumption efficiency.

[0008] In a specific implementation manner, a sliding block is provided on one side of the screw nut pair, a sliding groove is provided on the inner wall of the rectangular frame, and the sliding block is slidably connected to the sliding groove.

[0009] In the above implementation process, the movement of the screw nut pair can be conveniently limited by the sliding connection between the slider and the slide groove.

[0010] In a specific implementation manner, bearings are embedded on both sides of the rectangular frame, and the ball screw pair is interference fit with the inner ring of the bearing.

[0011] In the above implementation process, the loss caused by the rotation is conveniently reduced by the interference fit between the ball screw pair and the inner ring of the bearing.

[0012] In a specific embodiment, a groove is formed on one side of the rectangular frame.

[0013] In the above implementation process, a groove is provided on one side of the rectangular frame to facilitate the movement of the lead screw nut pair in the rectangular frame.

[0014] In a specific implementation manner, a rotating block is disposed on one side of the upper sector plate and the connecting rod, and both ends of the rotating rod are rotatably connected to the rotating block respectively.

[0015] In the above implementation process, the setting of the rotating block facilitates the rotating rod to be hinged to the upper fan-shaped plate and the connecting rod respectively.

[0016] In a specific embodiment, a first screw is provided on one side of the mounting plate, and the first screw is threadedly connected to the upper sector plate.

[0017] In the above implementation process, the first screw rod is provided to facilitate assembly and disassembly of the mounting plate.

[0018] In a specific embodiment, a fixed block is provided on one side of the connecting plate, a connecting block is provided on one side of the upper fan-shaped plate, a second screw is provided on one side of the connecting block, the fixed block and the connecting block are connected by the second screw, and the connecting block is rotationally connected to the second screw.

[0019] In the above implementation process, the upper sector plate can be easily disassembled and assembled by providing the fixing block, the connecting block and the second screw rod.

[0020] Compared with the prior art, the beneficial effects of the present application are as follows: through the setting of the reciprocating sliding assembly, it is convenient to drive the upper fan-shaped plate to move, and it is convenient to adjust the height of the upper fan-shaped plate, and compensate for the problem of the increase in the area of ​​the triangular air leakage area after continuous wear of the sealing plate, so that the area of ​​the triangular air leakage area is maintained in a stable range, thereby ensuring that the air leakage volume remains in a stable area, and improving energy consumption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic cross-sectional structure diagram of a rotary air preheater sealing structure provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a cross-sectional structure of a lifting structure provided in an embodiment of the present application;

[0024] Figure 3 A schematic cross-sectional structure diagram of the connection relationship between the upper sector plate, the rotating rod, the mounting plate and the first screw provided in an embodiment of the present application;

[0025] Figure 4 A schematic cross-sectional structure diagram of the connection relationship between the connecting plate, upper fan-shaped plate, fixing block and connecting block provided in an embodiment of the present application.

[0026] In the figure: 10-air preheater body; 110-housing; 120-spindle; 130-connecting plate; 140-upper fan-shaped plate; 150-lower fan-shaped plate; 160-rotor; 170-sealing plate; 180-fixed block; 190-connecting block; 20-lifting structure; 210-reciprocating sliding assembly; 211-rectangular frame; 212-servo motor; 213-ball screw pair; 214-screw nut pair; 220-connecting rod; 230-rotating rod; 240-mounting plate; 250-slider; 260-rotating block; 270-first screw. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0028] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Example

[0030] See also Figure 1 The present application provides a rotary air preheater sealing structure, including an air preheater body 10 and a lifting structure 20.

[0031] Specifically, the lifting structure 20 facilitates the adjustment of the height of the upper fan-shaped plate 140, compensating for the problem of the increase in the area of ​​the triangular air leakage area after continuous wear of the sealing plate 170, so that the area of ​​the triangular air leakage area is maintained in a stable range, thereby ensuring that the air leakage volume remains in a stable area and improving energy consumption efficiency.

[0032] See also Figure 1 Figure 3 Figure 4 The air preheater body 10 includes a shell 110, a main shaft 120, a connecting plate 130, an upper fan-shaped plate 140, a lower fan-shaped plate 150, a rotor 160 and a sealing sheet 170. The main shaft 120 is connected to the shell 110, the connecting plate 130 is connected to the main shaft 120, the upper fan-shaped plate 140 is hinged to the connecting plate 130, the lower fan-shaped plate 150 is connected to the main shaft 120, the rotor 160 is connected to the main shaft 120, and the sealing sheet 170 is connected to the main shaft 120.

[0033] In the specific setting, a fixed block 180 is provided on one side of the connecting plate 130, a connecting block 190 is provided on one side of the upper fan-shaped plate 140, a second screw is provided on one side of the connecting block 190, the fixed block 180 and the connecting block 190 are connected by the second screw, and the connecting block 190 is rotatably connected to the second screw, wherein the setting of the fixed block 180, the connecting block 190 and the second screw facilitates the disassembly and assembly of the upper fan-shaped plate 140.

[0034] See also Figure 1 Figure 2 Figure 3The lifting structure 20 includes a reciprocating sliding assembly 210, a connecting rod 220, a rotating rod 230 and a mounting plate 240. The reciprocating sliding assembly 210 is arranged on one side of the shell 110, the connecting rod 220 is connected to the reciprocating sliding assembly 210, and the two ends of the rotating rod 230 are respectively hinged to the connecting rod 220 and the mounting plate 240, and the mounting plate 240 is connected to the upper fan-shaped plate 140.

[0035] In a specific configuration, the reciprocating sliding assembly 210 includes a rectangular frame 211, a servo motor 212, a ball screw pair 213 and a screw nut pair 214. The rectangular frame 211 is arranged on one side of the housing 110, the servo motor 212 is installed on one side of the rectangular frame 211, the ball screw pair 213 is connected to the servo motor 212, the ball screw pair 213 is rotatably connected to the rectangular frame 211, and the screw nut pair 214 is connected to the ball screw pair 213. The connecting rod 220 is connected to the screw nut pair 214, wherein the rectangular frame 211, the servo motor 212, the ball screw pair 213 and the screw nut pair 214 are arranged to conveniently drive the upper sector plate 140 to move, to conveniently adjust the height of the upper sector plate 140, to compensate for the problem of the increase in the area of ​​the triangular air leakage region of the sealing plate 170 after continuous wear, so that the area of ​​the triangular air leakage region is maintained in a stable range, thereby ensuring that the air leakage volume is maintained in a stable area, and improving energy consumption efficiency.

[0036] In the specific setting, a slider 250 is provided on one side of the screw nut pair 214, and a sliding groove is opened on the inner wall of the rectangular frame 211. The slider 250 is slidably connected to the sliding groove. The sliding connection between the slider 250 and the sliding groove can conveniently limit the movement of the screw nut pair 214.

[0037] In the specific configuration, bearings are embedded on both sides of the rectangular frame 211, and the ball screw pair 213 is interference fit with the inner ring of the bearing. The interference fit between the ball screw pair 213 and the inner ring of the bearing can conveniently reduce the loss caused by the rotation.

[0038] In a specific configuration, a groove is provided on one side of the rectangular frame 211 , wherein the groove is provided on one side of the rectangular frame 211 to facilitate the movement of the lead screw nut pair 214 in the rectangular frame 211 .

[0039] In the specific setting, a rotating block 260 is provided on one side of the upper fan-shaped plate 140 and the connecting rod 220, and the two ends of the rotating rod 230 are respectively rotatably connected to the rotating block 260. The setting of the rotating block 260 facilitates the rotating rod 230 to be hinged to the upper fan-shaped plate 140 and the connecting rod 220 respectively.

[0040] In a specific configuration, a first screw rod 270 is disposed on one side of the mounting plate 240 , and the first screw rod 270 is threadedly connected to the upper fan-shaped plate 140 . The configuration of the first screw rod 270 facilitates assembly and disassembly of the mounting plate 240 .

[0041] The working principle of the rotary air preheater sealing structure is as follows: when the rotary air preheater sealing structure is used, the ball screw pair 213 is driven to rotate by the servo motor 212, so that the screw nut pair 214 drives the upper fan plate 140 to move, so as to facilitate the adjustment of the height of the upper fan plate 140, compensate for the problem of the increase in the area of ​​the triangular air leakage area after continuous wear of the sealing plate 170, so that the area of ​​the triangular air leakage area is maintained in a stable range, thereby ensuring that the air leakage volume is maintained in a stable area, improving the energy consumption efficiency, and facilitating the disassembly and assembly of the mounting plate 240 through the setting of the first screw 270, and facilitating the disassembly and assembly of the upper fan plate 140 through the setting of the fixing block 180, the connecting block 190 and the second screw, thereby improving the practicality of the device.

[0042] It should be noted that the specific models and specifications of the rotor 160, the sealing plate 170 and the servo motor 212 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0043] The power supply and principle of the rotor 160 and the servo motor 212 are clear to those skilled in the art and will not be described in detail here.

[0044] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A rotary air preheater sealing structure, characterized in that: include An air preheater body (10), the air preheater body (10) comprising a shell (110), a main shaft (120), a connecting plate (130), an upper fan-shaped plate (140), a lower fan-shaped plate (150), a rotor (160) and a sealing sheet (170), the main shaft (120) being connected to the shell (110), the connecting plate (130) being connected to the main shaft (120), the upper fan-shaped plate (140) being hinged to the connecting plate (130), the lower fan-shaped plate (150) being connected to the main shaft (120), the rotor (160) being connected to the main shaft (120), and the sealing sheet (170) being connected to the main shaft (120); A lifting structure (20), the lifting structure (20) comprising a reciprocating sliding assembly (210), a connecting rod (220), a rotating rod (230) and a mounting plate (240), the reciprocating sliding assembly (210) being arranged on one side of the shell (110), the connecting rod (220) being connected to the reciprocating sliding assembly (210), the two ends of the rotating rod (230) being respectively hinged to the connecting rod (220) and the mounting plate (240), and the mounting plate (240) being connected to the upper fan-shaped plate (140).

2. A rotary air preheater sealing structure according to claim 1, characterized in that: The reciprocating sliding assembly (210) comprises a rectangular frame (211), a servo motor (212), a ball screw pair (213) and a screw nut pair (214); the rectangular frame (211) is arranged on one side of the housing (110); the servo motor (212) is installed on one side of the rectangular frame (211); the ball screw pair (213) is connected to the servo motor (212); the ball screw pair (213) is rotatably connected to the rectangular frame (211); the screw nut pair (214) is connected to the ball screw pair (213); and the connecting rod (220) is connected to the screw nut pair (214).

3. A rotary air preheater sealing structure according to claim 2, characterized in that: A sliding block (250) is provided on one side of the lead screw nut pair (214), a sliding groove is provided on the inner wall of the rectangular frame (211), and the sliding block (250) is slidably connected to the sliding groove.

4. A rotary air preheater sealing structure according to claim 2, characterized in that: Bearings are embedded on both sides of the rectangular frame (211), and the ball screw pair (213) is interference fit with the inner ring of the bearing.

5. A rotary air preheater sealing structure according to claim 2, characterized in that: A groove is formed on one side of the rectangular frame (211).

6. A rotary air preheater sealing structure according to claim 1, characterized in that: A rotating block (260) is disposed on one side of the upper sector plate (140) and the connecting rod (220), and both ends of the rotating rod (230) are rotatably connected to the rotating block (260).

7. The rotary air preheater sealing structure according to claim 1, characterized in that: A first screw rod (270) is disposed on one side of the mounting plate (240), and the first screw rod (270) is threadedly connected to the upper sector plate (140).

8. The rotary air preheater sealing structure according to claim 1, characterized in that: A fixing block (180) is disposed on one side of the connecting plate (130), a connecting block (190) is disposed on one side of the upper fan-shaped plate (140), a second screw rod is disposed on one side of the connecting block (190), the fixing block (180) and the connecting block (190) are connected via the second screw rod, and the connecting block (190) is rotationally connected to the second screw rod.

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