Locking and limiting device of large fan shaft sealing ring

Abstract

The utility model discloses a locking and limiting device of a large fan shaft sealing ring, and belongs to the technical field of fan shaft sealing. Comprising an upper locking ring and a lower locking ring, the upper locking ring and the lower locking ring are of semi-arc structures, the upper locking ring and the lower locking ring are connected together through fastening bolts and fastened on a transmission shaft of the fan, and a plurality of adjusting screws parallel to the transmission shaft are arranged on the upper locking ring and the lower locking ring in a threaded mode. The utility model effectively solves the problems of sealing effect weakening, lubricating oil leakage, insufficient bearing lubrication, frequent damage and the like caused by the fact that the sealing ring is not installed in place, and avoids shutdown and production delay caused by the sealing effect weakening, lubricating oil leakage, insufficient bearing lubrication, frequent damage and the like. The service life of the sealing ring can be prolonged, and the sealing ring has the advantages of being convenient to adjust, timely in problem finding, rapid in processing and the like.

Description

Technical Field

[0001] This utility model relates to the field of fan shaft sealing technology, specifically to a locking and limiting device for a large fan shaft sealing ring, and particularly to a shaft sealing locking and limiting device for a shaft end sealing device using an aluminum sealing ring at the shaft seal of a large ring fan and exhaust fan. Background Technology

[0002] Circular dust collectors are primarily used in metallurgical industries to collect, treat, and discharge harmful fumes emitted from furnaces. This system effectively collects and treats fumes generated during the metallurgical process using specific technologies, ensuring that emissions meet environmental standards and thus protecting the environment and the health of operators. The application of circular dust collectors, especially in environmental fume treatment at smelters, plays a crucial role. It collects and aggregates SO2-containing fumes escaping from various furnace openings, and after desulfurization treatment to meet environmental requirements, discharges them centrally outside the main plant. This not only ensures that the main smelting plant meets occupational health requirements but also improves the comprehensive recovery rate of sulfur resources, which is beneficial for sulfuric acid production.

[0003] The rear seal of the bearing housing of the ring blower uses an aluminum sealing ring, which is fixed in place by circumferential set screws. The gap between the aluminum sealing ring and the bearing housing is adjusted by adjusting the position of three set screws. This ensures that the outer ring of the sealing ring does not rub against the circumference of the bearing housing while maintaining a 0.5mm gap to prevent lubricating oil leakage and thus achieve the function of shaft end sealing.

[0004] However, the most significant and perplexing problem for large ring blowers is the inadequate shaft end sealing, with oil leakage being a common occurrence. The main reason is the uneven stress on the aluminum sealing ring under the action of the three set screws, making it difficult to maintain the correct clearance. The aluminum sealing ring frequently becomes misaligned during installation. Once the blower starts, the sealing ring may wobble, or in severe cases, it may rub against the cylindrical cavity inside the bearing housing, causing wear and deformation, loss of tightening force, and even cracking or breakage. This results in weakened sealing of the bearing housing and significant lubricant leakage. Inadequate bearing lubrication leads to easy damage to the bearing under high temperatures, causing frequent equipment shutdowns for maintenance. The large amount of leaked lubricant is not only difficult to clean but also causes severe pollution to the plant, posing safety hazards. Furthermore, the aluminum sealing ring is installed as a single unit, making removal and replacement extremely troublesome, requiring the complete removal of the impeller and bearing before replacement. Moreover, the sealing ring is made of soft aluminum, making it very prone to wear and deformation. Uneven stress during tightening of the set screws can also cause deformation of the sealing ring. If the screw tightening force is too weak, the set screw will loosen and fall off after a period of operation. If the tightening force is too strong, it will deform the sealing ring. Therefore, how to properly install the sealing ring, prevent it from falling off, and extend its service life is an urgent problem to be solved. This problem has been affecting the normal and continuous operation of the ring blower. Utility Model Content

[0005] The purpose of this invention is to provide a locking and limiting device for a large fan shaft sealing ring. This device has both adjusting and limiting functions, confining the aluminum sealing ring within a certain range to prevent it from falling off. Furthermore, during installation, the sealing ring can be adjusted to be perpendicular to the shaft by adjusting four adjusting screws, and then fixed by the set screws on the sealing ring. This effectively prevents seal deformation caused by uneven tightening force during installation. Moreover, during operation, the limiting device can hold the sealing ring in place, preventing it from falling off. This solves the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A locking and limiting device for a large fan shaft sealing ring includes an upper locking ring 1 and a lower locking ring 2. The upper locking ring 1 and the lower locking ring 2 are semi-circular arc structures. The upper locking ring 1 and the lower locking ring 2 are connected together by fastening bolts 3 and fastened to the drive shaft of the fan. Several adjusting screws 4 parallel to the drive shaft are threaded on the upper locking ring 1 and the lower locking ring 2.

[0008] The upper locking ring 1 has symmetrical grooves on the outer sides of both ends, and bolt mounting through holes are vertically opened in the grooves.

[0009] The lower locking ring 2 has symmetrical vertical bolt holes at both ends, corresponding to the bolt mounting through holes. The fastening bolt 3 passes through the bolt mounting through holes on the upper locking ring 1 and is tightened into the bolt holes of the lower locking ring 2.

[0010] The upper locking ring 1 has two symmetrical horizontal threaded holes, each of which is used to thread an adjusting screw 4.

[0011] The lower locking ring 2 has two symmetrical horizontal threaded holes, each of which is used to thread an adjusting screw 4.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] This utility model features a simple structure and convenient operation, with adjustment and limiting functions. It can confine the aluminum sealing ring within a specific range to prevent it from falling off. During installation, the sealing ring can be adjusted to be perpendicular to the shaft by adjusting the four screws, and then fixed using the set screws on the sealing ring, effectively avoiding sealing deformation caused by uneven tightening force. Simultaneously, during equipment operation, the limiting device can hold the sealing ring in place, further preventing it from falling off.

[0014] In summary, this invention effectively solves the problems of weakened sealing effect, lubricating oil leakage, insufficient bearing lubrication, and frequent damage caused by improper installation of the sealing ring, thus avoiding shutdowns and production delays. By using this invention, the service life of the sealing ring can be extended, and it offers advantages such as convenient adjustment, timely problem detection, and quick resolution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a new top view of the utility model;

[0017] In the diagram: Upper locking ring 1; Lower locking ring 2; Fastening bolt 3; Adjusting screw 4. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Example 1

[0022] like Figure 1-2This embodiment provides a locking and limiting device for a large fan shaft sealing ring, including an upper locking ring 1 and a lower locking ring 2. The upper locking ring 1 and the lower locking ring 2 are semi-circular arc structures. The upper locking ring 1 and the lower locking ring 2 are connected together by fastening bolts 3 and fastened to the drive shaft of the fan. Several adjusting screws 4 parallel to the drive shaft are threaded on the upper locking ring 1 and the lower locking ring 2.

[0023] The upper locking ring 1 has symmetrical grooves on the outer sides of both ends, and vertical bolt mounting holes are formed in the grooves. The lower locking ring 2 has symmetrical vertical bolt holes on both ends corresponding to the bolt mounting holes. The fastening bolts 3 pass through the bolt mounting holes on the upper locking ring 1 and are tightened into the bolt holes on the lower locking ring 2.

[0024] The upper locking ring 1 has two symmetrical horizontally threaded holes, each for threaded installation of an adjusting screw 4. The lower locking ring 2 also has two symmetrical horizontally threaded holes, each for threaded installation of an adjusting screw 4.

[0025] The working principle of this utility model is as follows: 1. When an aluminum sealing end cover needs to be installed on the shaft of a large fan, this fastening device can be installed on the outside of the sealing ring. Then, adjust the adjusting screws installed on the upper and lower locking rings. By adjusting the position of the adjusting screws, the adjusting screws can act directly on the sealing ring. Fine-tuning with four adjusting screws can make the sealing ring perpendicular to the vertical plane of the shaft. At the same time, the sealing ring can be tightly attached to the inner cavity of the bearing chamber, preventing improper installation. Finally, adjust the three set screws around the sealing ring. Because of the function of this limiting device, when tightening the three set screws around the sealing ring, it can fundamentally avoid the sealing ring installation deviation caused by uneven force or the deformation of the sealing ring caused by excessive force. It can quickly and accurately install the sealing ring into place, and can improve installation efficiency and quality. This utility model can solve the problems of weakened sealing effect, large amount of lubricating oil leakage, insufficient bearing lubrication, frequent bearing damage and shutdown caused by improper installation of the sealing ring, thus delaying production.

[0026] 2. After installing the sealing ring, loosen all adjusting screws 4 on the limiting device to release tension, then remove it from the locking limiting device. Loosen the fastening bolts 3 counterclockwise with an Allen wrench. Then move the limiting adjustment device towards the sealing ring so that it is flush against the sealing ring but not in contact with it, ensuring a gap of approximately 1-2mm. This ensures that the sealing ring and the locking limiting device do not contact each other and maintain a certain gap during equipment operation. If the sealing ring becomes loose, shifts, or falls off, its operation can be detected through daily inspections. If deviation or a decrease in gap occurs, stop the machine immediately. The solution is as follows: After installing the four adjusting screws on the locking limiting device, loosen the three set screws on the sealing ring. Adjust the limiting screws and set screws, and readjust the sealing ring position as described above to ensure accurate installation. Using this locking limiting device can extend the service life of the sealing ring and offers the advantages of convenient adjustment, timely problem detection, and quick and easy troubleshooting.

Claims

1. A locking and limiting device for a large fan shaft sealing ring, comprising an upper locking ring (1) and a lower locking ring (2), characterized in that, The upper locking ring (1) and the lower locking ring (2) are semicircular arc structures, the upper locking ring (1) and the lower locking ring (2) are connected together through fastening bolts (3) and are fastened on the transmission shaft of the fan, and a plurality of adjusting screws (4) parallel to the transmission shaft are threadedly arranged on the upper locking ring (1) and the lower locking ring (2).

2. A locking and limiting device for a large fan shaft sealing ring according to claim 1, characterized in that: The outer side of the two end heads of the upper locking ring (1) is symmetrically provided with a groove, and a bolt mounting through hole is vertically arranged in the groove.

3. A locking and limiting device for a large fan shaft sealing ring according to claim 2, characterized in that: The two end heads of the lower locking ring (2) are symmetrically and vertically provided with bolt holes corresponding to the bolt mounting through hole, and the fastening bolts (3) are screwed in the bolt holes of the lower locking ring (2) after passing through the bolt mounting through hole of the upper locking ring (1).

4. The locking and limiting device for a large fan shaft sealing ring according to claim 1, characterized in that: The upper locking ring (1) is symmetrically and transversely provided with two screw holes, and each screw hole is used for threadedly assembling one adjusting screw (4).

5. A locking and limiting device for a large fan shaft sealing ring according to claim 1, characterized in that: The lower locking ring (2) is symmetrically and transversely provided with two screw holes, and each screw hole is used for threadedly assembling one adjusting screw (4).

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