High-temperature fan shaft end sealing device

Abstract

The utility model discloses a shaft end sealing device of a high-temperature fan, which is sleeved at the shaft end of a fan shaft and comprises an end cover and a gland. An annular first boss is fixed in the circumferential direction of the first outer end face of the end cover, and the second outer end face of the end cover is fixed to the outer wall of the case. The gland and the end cover are oppositely arranged, an annular second boss is fixed in the circumferential direction of the outer end face of the gland, and the second boss and the first boss are arranged through a through shaft and are in pressing fit; sealing cotton felts are embedded between the outer wall of the fan shaft and the inner wall of the first boss and between the outer wall of the fan shaft and the inner wall of the second boss. A double-layer sealing structure is adopted, the sealing effect of the shaft end of the high-temperature fan is effectively guaranteed, meanwhile, the detachable connection mode is convenient to assemble and disassemble, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical and metallurgical equipment sealing, and more particularly to a high-temperature fan shaft end sealing device. Background Art

[0002] High-temperature fans are commonly used to transport high-temperature, dusty gases in the chemical industry, metallurgy, and environmental protection. These fans are specialized fans designed for high-temperature workplaces. Their materials offer strong resistance to high temperatures and high pressures. They primarily include stainless steel high-temperature fans, transmission high-temperature fans, and centrifugal high-temperature fans. They are widely used to transport high-temperature, dusty gases in the chemical industry, petroleum, metallurgy, forging, power generation, nuclear power plants, and environmental protection.

[0003] At present, the shaft end of the high-temperature fan is only sealed with an annular cotton felt connected to the casing. The sealing effect is poor, smoke and dust leakage occurs, and the cotton felt corrodes and burns after running for a period of time, seriously affecting the safe operation of the high-temperature fan.

[0004] Therefore, how to provide a high-temperature fan shaft end sealing device that can be used for the shaft end sealing of the high-temperature fan for a long time, extend its service life, facilitate maintenance, and avoid smoke and dust leakage is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] In view of this, the present invention provides a high-temperature fan shaft end sealing device, aiming to solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-temperature fan shaft end sealing device is sleeved on the shaft end of the fan shaft and includes an end cover and a pressure cover;

[0008] A first annular boss is fixed along the circumference of the first outer end surface of the end cover, and the second outer end surface of the end cover is fixed to the outer wall of the chassis;

[0009] The gland is arranged opposite to the end cover, and an annular second boss is fixed along the circumference of the outer end surface of the gland and the end cover. The second boss is coaxially arranged with the first boss and is press-fitted.

[0010] Wherein, a fan shaft assembly hole is provided in the end cover and the pressure cover, the fan shaft passes through the fan shaft assembly hole, and sealing cotton felt is embedded between the outer wall of the shaft body and the inner walls of the first boss and the second boss.

[0011] The beneficial effect of the above technical solution is that the sealing device is sleeved on the shaft end and fixed to the chassis, and sealing cotton felt is embedded between the fan shaft and the end cover and the pressure cover, which effectively realizes the sealing of the high-temperature fan shaft end and ensures the effective temperature operation of the high-temperature fan.

[0012] Preferably, a pressure plate is further included, wherein a stepped surface is formed between the outer periphery of the first boss and the first outer end surface of the end cover; the pressure plate presses against the stepped surface and is fastened to the outer wall of the chassis via bolts. The end cover and the chassis are detachably connected by the pressure plate welded to the outer wall of the chassis, facilitating installation and removal of the sealing device.

[0013] Preferably, the sealing felt is embedded between the second outer end surface of the end cover and the outer wall of the chassis. A sealing felt is embedded between the end cover and the chassis, and between the end cover, the gland and the fan shaft, using a double-layer sealing method to ensure the sealing effect inside the high-temperature fan shaft end.

[0014] Preferably, a plurality of first bolt holes are formed on the annular surface of the first boss, and a plurality of second bolt holes are formed on the gland that are in communication with the plurality of first bolt holes. The threaded ends of the fastening bolts are screwed into the second bolt holes and the first bolt holes in sequence to fasten the gland to the end cover. The end cover and the gland are detachably connected by bolts, making assembly convenient.

[0015] Preferably, the inner wall of the second boss is provided with a receiving groove, and the sealing felt is embedded between the inner wall of the receiving groove and the outer wall of the fan shaft. The sealing depth of the sealing felt on the fan shaft can be adjusted by adjusting the tightness of the fastening bolts between the gland and the end cap, and the sealing gap can be adjusted at any time according to the sealing condition of the shaft end.

[0016] Preferably, the outer diameter of the end cover is larger than the outer diameter of the first boss, the outer diameter of the first boss is the same as the outer diameter of the pressure cover, and the outer diameter of the second boss is smaller than the outer diameter of the first boss.

[0017] Preferably, a filling gap is provided between the outer wall of the fan shaft and the inner walls of the end cover and the gland, so as to facilitate the embedding of the sealing cotton felt.

[0018] It can be seen from the above technical solution that compared with the existing technology, the utility model discloses a high-temperature fan shaft end sealing device, which adopts a double-layer sealing structure to effectively ensure the sealing effect of the high-temperature fan shaft end. At the same time, the detachable connection method is convenient for installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 A cross-sectional view of the shaft end sealing device provided by the utility model;

[0021] Figure 2 A top view of the end cover provided by the utility model;

[0022] Figure 3 A cross-sectional view of the end cover provided by the utility model;

[0023] Figure 4 A top view of the gland provided by the utility model;

[0024] Figure 5 A cross-sectional view of the gland provided by the present utility model;

[0025] Figure 6 This is a front view of the installation of the sealing device provided by the utility model.

[0026] in,

[0027] 1-end cover; 11-first bolt hole; 12-first boss; 2-pressure cover; 21-second bolt hole; 22-second boss; 3-fan shaft; 4-sealing cotton felt; 5-pressure plate; 6-chassis. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See attached Figures 1 to 6 , the embodiment of the utility model discloses a high temperature fan shaft end sealing device, which is sleeved on the shaft end of the fan shaft 3 and includes an end cover 1 and a pressure cover 2;

[0030] A first annular boss 12 is fixed along the circumference of the first outer end surface of the end cover 1, and the second outer end surface of the end cover 1 is fixed to the outer wall of the chassis 6;

[0031] The gland 2 is arranged opposite to the end cover 1. An annular second boss 22 is fixed along the circumference of the outer end surface of the gland 2 opposite to the end cover 1. The second boss 22 is arranged through the axis and tightly fitted with the first boss 12.

[0032] Among them, a fan shaft assembly hole is provided in the end cover 1 and the pressure cover 2, the fan shaft 3 passes through the fan shaft assembly hole and a sealing cotton felt 4 is embedded between the outer wall of the shaft body and the inner walls of the first boss 12 and the second boss 22.

[0033] In this embodiment, the end cover is connected to the chassis, and the gland is bolted to the end cover. Both the end cover and the gland are annular covers, and a sealing cotton felt is embedded between the inner wall of the gland and the fan shaft to seal the shaft end of the fan. The outer surfaces of the gland and the end cover are formed with a boss.

[0034] In order to further optimize the above technical solution and facilitate the connection between the end cover and the chassis, a pressure plate 5 is also included, and a step surface is formed between the outer periphery of the first boss 12 and the first outer end surface of the end cover 1; the pressure plate 5 presses the step surface and is fastened to the outer wall of the chassis 6 by bolts.

[0035] like Figure 6 As shown, bolts are welded to the outer wall of the chassis. One end of the pressure plate has a bent section, the end face of which abuts the outer wall of the chassis. The panel presses the stepped surface between the end cover and the first boss. At the same time, the pressure plate has a through hole adapted for the bolt. After pressing the end cover tightly, the pressure plate is placed on the bolt and fastened to the end cover and chassis via a nut. The detachable structure facilitates installation and removal of the end cover.

[0036] In order to further optimize the above technical solution, a sealing felt 4 is embedded between the second outer end surface of the end cover 1 and the outer wall of the chassis 6. By adjusting the tightness of the nut, the sealing depth of the sealing felt between the end cover and the chassis can be adjusted.

[0037] A sealing cotton felt is provided between the end cover and the outer wall of the chassis, and a sealing cotton felt is provided between the inner wall of the end cover and the pressure cover and the fan shaft. A double-layer sealing method is adopted to improve the sealing effect of the high-temperature fan shaft end; at the same time, the end cover can be used as a sealer, and the gap between the end cover and the chassis and the fan shaft is completely sealed, which greatly improves the sealing performance of the high-temperature fan shaft end.

[0038] In order to further optimize the above technical solution, a detachable connection is made between the end cover and the pressure cover to facilitate the fixation between the pressure cover and the end cover. A plurality of first bolt holes 11 are provided on the annular surface of the first boss 12, and a second bolt hole 21 corresponding to and connected to the plurality of first bolt holes 11 is provided on the pressure cover 2. The threaded end of the fastening bolt is screwed into the second bolt hole 21 and the first bolt hole 11 in turn to fasten the pressure cover 2 to the end cover 1.

[0039] To further optimize the above technical solution, a receiving groove is formed on the inner wall of the second boss 22, and a sealing felt 4 is embedded between the inner wall of the receiving groove and the outer wall of the fan shaft 3. Since the annular surface of the second boss has bolt holes, when the gland and end cover are fixed together by fastening bolts, the threaded end of the fastening bolt will penetrate the receiving groove and screw into the sealing felt. The sealing depth of the sealing felt can be adjusted by adjusting the tightness of the fastening bolt. At the same time, the fastening bolt can also adjust the sealing depth of the sealing felt between the end cover and the chassis.

[0040] To further optimize the above technical solution and facilitate the installation of the sealing felt, a filling gap is provided between the outer wall of the fan shaft 3 and the inner walls of the end cover 1 and gland 2. The gap between the fan shaft and the end cover and gland is 5 to 8 mm, and the sealing depth of the sealing felt can be adjusted by tightening the bolts according to the sealing degree.

[0041] In this embodiment, the outer diameter of the end cover 1 is larger than the outer diameter of the first boss 12, the outer diameter of the first boss 12 is the same as the outer diameter of the pressure cover 2, and the outer diameter of the second boss 22 is smaller than the outer diameter of the first boss 12; the inner diameter of the second bolt hole 21 is larger than the inner diameter of the first bolt hole 11.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0043] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-temperature fan shaft end sealing device, sleeved on the shaft end of the fan shaft (3), characterized in that: It comprises an end cover (1) and a gland (2); A first annular boss (12) is fixed along the circumference of a first outer end surface of the end cover (1), and a second outer end surface of the end cover (1) is fixed to an outer wall of the chassis (6); The gland (2) is arranged opposite to the end cover (1), and an annular second boss (22) is fixed along the circumference of the outer end surface of the gland (2) opposite to the end cover (1), and the second boss (22) is coaxially arranged with the first boss (12) and is press-fitted; A fan shaft assembly hole is provided in the end cover (1) and the pressure cover (2), the fan shaft (3) passes through the fan shaft assembly hole, and sealing cotton felt (4) is embedded between the outer wall of the shaft body and the inner walls of the first boss (12) and the second boss (22).

2. A high temperature fan shaft end sealing device according to claim 1, characterized in that: It also includes a pressure plate (5), wherein a step surface is formed between the outer periphery of the first boss (12) and the first outer end surface of the end cover (1); the pressure plate (5) presses the step surface and is fastened to the outer wall of the chassis (6) by bolts.

3. A high temperature fan shaft end sealing device according to claim 2, characterized in that: The sealing cotton felt (4) is embedded between the second outer end surface of the end cover (1) and the outer wall of the chassis (6).

4. A high temperature fan shaft end sealing device according to claim 1, characterized in that: A plurality of first bolt holes (11) are provided on the annular surface of the first boss (12), and a second bolt hole (21) corresponding to and connected to the plurality of first bolt holes (11) is provided on the pressure cover (2), and the threaded end of the fastening bolt is screwed into the second bolt hole (21) and the first bolt hole (11) in sequence to fasten the pressure cover (2) to the end cover (1).

5. A high temperature fan shaft end sealing device according to claim 4, characterized in that: An accommodating groove is provided on the inner wall of the second boss (22), and the sealing cotton felt (4) is embedded between the inner wall of the accommodating groove and the outer wall of the fan shaft (3).

6. A high temperature fan shaft end sealing device according to claim 1, characterized in that: The outer diameter of the end cover (1) is greater than the outer diameter of the first boss (12), the outer diameter of the first boss (12) is the same as the outer diameter of the pressure cover (2), and the outer diameter of the second boss (22) is smaller than the outer diameter of the first boss (12).

7. The high temperature fan shaft end sealing device according to claim 1, characterized in that: There is a filling gap between the outer wall of the fan shaft (3) and the inner walls of the end cover (1) and the pressure cover (2).

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