A labyrinth anti-crystallization jamming component for a fan moving vane

Abstract

The utility model discloses a kind of guide fan moving vane labyrinth type anti-crystallization jamming components, it is related to fan blade technical field, including fixed ring, the circumference outer wall of the fixed ring is annularly equidistantly fixed and installed with multiple cylinder pieces, the cylinder piece is used to fix fan blade, the middle part of the fixed ring is rotatably connected with fixed shaft, sealing ring is arranged between the fixed shaft and the middle part of fixed ring, multiple through holes are set on fixed shaft on the side of the sealing ring. Through the sealing ring of being set, and the multiple through holes of being correspondingly set on fixed shaft, in actual use process, the through hole coated with lubricating layer can realize the efficient discharge of crystal, and cooperate with the setting of cover body and connecting pipe, can avoid that crystal is accumulated between fixed shaft and fixed ring, ensure the normal use of fan.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade technology, specifically a labyrinth-type anti-crystallization and anti-jamming component for induced draft turbine blades. Background Technology

[0002] Exhaust fans, as key ventilation equipment in industrial production, are mainly used to extract dust-laden and humid flue gas discharged from boilers, incinerators, and other equipment. In scenarios such as desulfurization systems for thermal power plants and waste incineration flue gas treatment, the flue gas often contains easily crystallizing media such as gypsum slurry, salt, and dust. These media are prone to deposition and crystallization in the gap between the moving blades and the hub of the exhaust fan, causing the moving blades to jam, and in severe cases, even preventing the blades from rotating, directly affecting the normal operation of the exhaust fan. Current anti-crystallization jamming measures for exhaust fan moving blades have obvious defects: although traditional gap sealing designs are simple in structure, they cannot prevent tiny crystalline particles from entering the gap, and once crystals form, they gradually accumulate, leading to gap blockage; furthermore, high-temperature flue gas causes the seals to age and fail, and elastic components are easily scratched by hard crystalline particles. To address these problems, a labyrinth-type anti-crystallization jamming component for exhaust fan moving blades is proposed to solve the above issues. Utility Model Content

[0003] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a labyrinth-type anti-crystallization and jamming component for fan blades, comprising a fixing ring, wherein multiple cylindrical parts are fixedly installed in a ring at equal intervals on the outer circumference of the fixing ring, the cylindrical parts being used to fix the fan blades, a fixing shaft being rotatably connected to the middle of the fixing ring, a sealing ring being provided between the fixing shaft and the middle of the fixing ring, and multiple through holes being provided on one side of the sealing ring on the fixing shaft.

[0004] Preferably, the plurality of through holes are formed in a ring structure on the fixed shaft, and one end of the plurality of through holes overlaps with the outer wall of the sealing ring, while the other end of the plurality of through holes extends to the outer wall of the fixed shaft.

[0005] Preferably, it also includes a cover fixedly installed at one end of the fixed shaft. The cover is provided with a connecting pipe, which is connected to the suction end of an external air pump. Multiple fixing blocks are arranged in a ring at equal intervals on the outer circumference of the cover. The fixing blocks are connected and fixed to the mounting holes opened on the outer wall of the fixed shaft by bolts.

[0006] Preferably, it further includes a sealing ring disposed on the outer wall of the other end of the fixed shaft, wherein one side of the outer wall of the sealing ring overlaps with the outer wall of the fixed shaft, and the other side of the outer wall of the sealing ring overlaps with the outer wall of the fixed ring.

[0007] Preferably, the outer wall of the sealing ring is provided with a plurality of overlapping blocks in a ring shape at equal intervals, and the overlapping blocks are bonded and fixed to the outer wall of the fixing ring.

[0008] Preferably, the through hole is arc-shaped, and the inner wall of the through hole is coated with a lubricating layer.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] This invention, through the setting of a sealing ring and the corresponding through holes opened on the fixed shaft, enables the efficient discharge of crystals through the through holes coated with a lubricating layer during actual use. In addition, with the setting of the cover and connecting pipe, it can prevent crystals from accumulating between the fixed shaft and the fixed ring, ensuring the normal operation of the fan. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of the anti-crystallization jamming component of this utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the anti-crystallization jamming component of this utility model;

[0014] Figure 3 This is a schematic diagram of the overall explosion of the anti-crystallization jamming component of this utility model.

[0015] In the diagram: 1. Fixing ring; 11. Cylindrical component; 2. Sealing ring; 3. Fixing shaft; 31. Mounting hole; 32. Through hole; 4. Cover; 41. Connecting pipe; 42. Fixing block; 43. Bolt; 5. Sealing ring; 51. Overlapping block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Figures 1-3As shown, this utility model provides a labyrinth-type anti-crystallization and anti-jamming assembly for induced draft fan blades, including: a fixing ring 1, with multiple cylindrical components 11 fixedly installed in a ring at equal intervals on the outer circumference of the fixing ring 1. The cylindrical components 11 are used to fix the fan blades. A fixing shaft 3 is rotatably connected to the middle of the fixing ring 1. A sealing ring 5 is provided between the fixing shaft 3 and the middle of the fixing ring 1. Multiple through holes 32 are provided on one side of the sealing ring 5. Specifically, in this application, during actual operation, when the induced draft fan starts, the fixing shaft 3 rotates accordingly. Due to the setting of the sealing ring 5, it can effectively prevent small crystalline particles in the external flue gas from directly entering the gap between the fixing shaft 3 and the fixing ring 1. The multiple through holes 32 with a ring structure on the fixing shaft 3 have one end opening to overlap with the outer wall of the sealing ring 5, and the other end extending to the outer wall of the fixing shaft 3. This design allows the through holes 32 to form a special airflow channel during operation.

[0018] Furthermore, in this application, multiple through holes 32 are formed in a ring structure on the fixed shaft 3, with one end of each through hole 32 overlapping the outer wall of the sealing ring 5, and the other end extending to the outer wall of the fixed shaft 3. Specifically, with this configuration, when a small number of crystalline particles attempt to enter the gap, the airflow passes through the channel formed by the through holes 32, carrying the crystalline particles away and preventing their deposition within the gap. Moreover, the through holes 32 are arc-shaped, which allows for smoother airflow within the holes, reducing airflow resistance and further enhancing the effect of preventing crystalline particle deposition. Simultaneously, a lubricating layer is coated on the inner wall of the through holes 32, which not only reduces friction between the crystalline particles and the hole wall, lowering the likelihood of crystalline particles adhering to the hole wall, but also reduces friction during the rotation of the fixed shaft 3 to a certain extent, improving the overall operating efficiency of the assembly.

[0019] Furthermore, the assembly includes a cover 4 fixedly installed at one end of the fixed shaft 3. The cover 4 has a connecting pipe 41 that communicates with the suction end of an external air pump. Multiple fixing blocks 42 are arranged in a ring at equal intervals on the outer circumference of the cover 4. These fixing blocks 42 are connected and fixed to mounting holes 31 on the outer wall of the fixed shaft 3 using bolts 43. The cover 4 is fixedly installed at one end of the fixed shaft 3, and the connecting pipe 41 on it communicates with the suction end of the external air pump. During operation, the external air pump draws air through the connecting pipe 41, creating a negative pressure environment inside the cover 4. This helps to remove any crystalline particles that may enter the end of the fixed shaft 3, preventing them from entering the assembly. The multiple fixing blocks 42 arranged in a ring at equal intervals on the outer circumference of the cover 4, connected and fixed to mounting holes 31 on the outer wall of the fixed shaft 3 using bolts 43, ensure the stability of the cover 4 installation.

[0020] In one embodiment, this application also includes a sealing ring 2 disposed on the outer wall of the other end of the fixed shaft 3. One side of the outer wall of the sealing ring 2 overlaps with the outer wall of the fixed shaft 3, and the other side of the outer wall of the sealing ring 2 overlaps with the outer wall of the fixed ring 1. Specifically, the sealing ring 2 disposed on the outer wall of the other end of the fixed shaft 3 has one side of its outer wall overlapping with the outer wall of the fixed shaft 3, and the other side of its outer wall overlapping with the outer wall of the fixed ring 1, further enhancing the sealing performance of the assembly and preventing crystalline media in the external flue gas from entering the gap from the other end of the fixed shaft 3. Multiple overlapping blocks 51 arranged in a ring shape at equal intervals on the outer wall of the sealing ring 5 are bonded and fixed to the outer wall of the fixed ring 1, ensuring the firmness of the sealing ring 5 installation and enabling it to stably play its role in blocking crystalline particles.

[0021] Specifically, in this application, the outer wall of the sealing ring 5 is provided with multiple overlapping blocks 51 arranged in a ring at equal intervals. The overlapping blocks 51 are bonded and fixed to the outer wall of the fixing ring 1. This bonding and fixing method is not only easy to install, but also ensures a tight connection between the sealing ring 5 and the fixing ring 1, effectively preventing crystalline media in the flue gas from entering through the gap between them. In practical applications, the sealing ring 5 is firmly combined with the fixing ring 1 through multiple overlapping blocks 51, forming a reliable sealing barrier, which greatly reduces the risk of crystalline particles entering the gap between the fixing shaft 3 and the fixing ring 1. At the same time, this design also facilitates the later maintenance and replacement of the sealing ring 5.

[0022] In one embodiment, the through hole 32 in this application is arranged in an arc shape, and a lubricating layer is coated on the inner wall of the through hole 32. The arc shape of the through hole is a carefully designed feature. During the operation of the induced draft fan, the airflow flowing within the arc-shaped through hole forms a more stable and smooth airflow trajectory. Compared to straight channels, the arc-shaped design reduces turbulence and collisions within the hole, allowing the airflow to pass through more efficiently. This more effectively removes any crystalline particles that may enter the gaps, further enhancing the effect of preventing crystalline particle deposition.

[0023] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A labyrinth-type anti-crystallization and anti-jamming component for induced draft turbine blades, characterized in that, include: A fixing ring (1) has multiple cylindrical parts (11) fixedly installed in a ring at equal intervals on its outer circumference. The cylindrical parts (11) are used to fix the fan blades. A fixing shaft (3) is rotatably connected to the middle of the fixing ring (1). A sealing ring (5) is provided between the fixing shaft (3) and the middle of the fixing ring (1). Multiple through holes (32) are provided on one side of the sealing ring (5) on the fixing shaft (3).

2. The labyrinth-type anti-crystallization and anti-jamming assembly for induced draft turbine blades as described in claim 1, characterized in that, Multiple through holes (32) are formed in a ring structure on the fixed shaft (3), and one end of the multiple through holes (32) is connected to the outer wall of the sealing ring (5), while the other end of the multiple through holes (32) extends to the outer wall of the fixed shaft (3).

3. The labyrinth-type anti-crystallization and anti-jamming assembly for induced draft turbine blades as described in claim 2, characterized in that, It also includes a cover (4) fixedly installed at one end of the fixed shaft (3). The cover (4) is provided with a connecting pipe (41), which is connected to the suction end of the external air pump. Multiple fixing blocks (42) are arranged in a ring at equal intervals on the outer circumference of the cover (4). The fixing blocks (42) are connected and fixed to the mounting holes (31) opened on the outer wall of the fixed shaft (3) by bolts (43).

4. The labyrinth-type anti-crystallization and anti-jamming assembly for induced draft turbine blades as described in claim 3, characterized in that, It also includes a sealing ring (2) disposed on the outer wall of the other end of the fixed shaft (3), one side of the outer wall of the sealing ring (2) overlaps with the outer wall of the fixed shaft (3), and the other side of the outer wall of the sealing ring (2) overlaps with the outer wall of the fixed ring (1).

5. The labyrinth-type anti-crystallization and anti-jamming assembly for induced draft turbine blades as described in claim 4, characterized in that, The outer wall of the sealing ring (5) is provided with multiple overlapping blocks (51) arranged in a ring shape at equal intervals. The overlapping blocks (51) are bonded and fixed to the outer wall of the fixing ring (1).

6. The labyrinth-type anti-crystallization and anti-jamming assembly for induced draft turbine blades as described in claim 5, characterized in that, The through hole (32) is arranged in an arc shape, and the inner wall of the through hole (32) is coated with a lubricating layer.

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