Shaft end sealing structure to prevent dust leakage in rotating equipment

Abstract

This shaft end sealing structure for rotating equipment, designed to prevent dust spillage, falls under the field of sealing structures and is primarily intended to address the poor sealing performance of existing shaft end seals in dust-generating rotating equipment. It comprises an annular inner labyrinth seal body, which is fitted onto and fixed to the rotating shaft. Several baffles are fixed to the outer surface of the inner labyrinth seal body. An outer labyrinth seal body is located outside the inner labyrinth seal body and is bolted to the housing of the rotating equipment. The inner surface of the outer labyrinth seal body has a groove, within which the baffles of the inner labyrinth seal body are positioned. The outer labyrinth seal body contains an oil cavity with an oil inlet connected to it. The oil cavity is filled with packing material. The outer labyrinth seal body has a two-part structure, with the two separate outer labyrinth seal bodies connected by bolts. The packing material is lithium-based grease dry oil packing. Its advantage is excellent sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of sealing structures, specifically to a shaft end sealing structure for rotating equipment that can prevent dust from spilling out. Background Technology

[0002] Existing dust-generating shaft end seals for rotating equipment include a sealing seat welded to the housing, a sealing gland connected to the sealing seat by bolts, and sealing materials such as felt and packing filling the space between the sealing gland and the sealing seat. The sealing material adheres to the rotating shaft to prevent dust from overflowing from the rotating equipment. However, the drawback is that the existing sealing material rubs against the rotating shaft for a long time, causing it to wear down and affecting its service life. This results in the sealing material not being able to fully adhere to the rotating shaft, leading to poor sealing performance, leakage of internal material dust, environmental pollution, and the need for shutdown for maintenance and replacement, which affects production and is time-consuming and labor-intensive. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a shaft end sealing structure for rotating equipment that has a good sealing effect and causes less environmental pollution, thus preventing dust from overflowing.

[0004] The purpose of this utility model is achieved as follows:

[0005] This sealing structure includes an annular inner labyrinth seal body, which is sleeved on and fixed to the rotating shaft. The outer ring of the inner labyrinth seal body is fixed with several annular baffles extending outward.

[0006] An outer labyrinth seal is provided outside the inner labyrinth seal. The outer ring of the outer labyrinth seal has mounting holes. The outer labyrinth seal is fixed to the housing of the rotating equipment by bolts. The inner ring of the outer labyrinth seal has several annular grooves that correspond to the baffles of the inner labyrinth seal. Each baffle on the inner labyrinth seal is placed in a groove of the outer labyrinth seal.

[0007] The outer labyrinth seal body has several interconnected oil cavities, and the outer labyrinth seal body has an oil injection port that communicates with the oil cavities; the oil cavities are filled with filler.

[0008] The outer labyrinth seal is a split structure, that is, the outer labyrinth seal is a two-part structure, and the two split outer labyrinth seals are connected together by bolts.

[0009] The filler inside the oil cavity of the external labyrinth seal is lithium-based grease dry oil filler.

[0010] The advantages of this utility model are: since the outer labyrinth seal is a split structure, the two split outer labyrinth seals are connected together by bolts, which makes it convenient to replace and maintain.

[0011] Because the oil cavity inside the outer labyrinth seal is filled with lithium-based grease dry oil filler, and the filler can be replenished through the oil injection port, the oil cavity is filled with filler, ensuring the sealing effect, preventing material dust from leaking out of the rotating equipment, and reducing environmental pollution. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0014] Figure 3 This is a side view structural diagram of the outer labyrinth sealing body of this utility model. Detailed Implementation

[0015] The following is combined with Figure 1-3 The present invention will be further described below;

[0016] This sealing structure is installed on the rotating shaft between the outer end face of the housing of the rotating equipment 5 and the bearing seat 6;

[0017] This sealing structure includes an annular inner labyrinth seal 1, which is sleeved on and fixed to the rotating shaft 2. The outer ring of the inner labyrinth seal is fixed with several annular baffles 3 extending outward.

[0018] An outer labyrinth seal 4 is provided outside the inner labyrinth seal body. The outer ring of the outer labyrinth seal body has mounting holes. The outer labyrinth seal body is fixed to the housing of the rotating device 5 by bolts. The inner ring of the outer labyrinth seal body has several annular grooves that are adapted to the baffles of the inner labyrinth seal body. Each baffle on the inner labyrinth seal body is placed in each groove of the outer labyrinth seal body.

[0019] The outer labyrinth seal body has several interconnected oil cavities, and the outer labyrinth seal body has an oil inlet 8 that is connected to the oil cavities; the oil cavities are filled with filler 7.

[0020] The outer labyrinth seal is a split structure, that is, the outer labyrinth seal is a two-part structure, and the two split outer labyrinth seals are connected together by bolts.

[0021] The filler inside the oil cavity of the external labyrinth seal is lithium-based grease dry oil filler.

[0022] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A shaft end sealing structure for preventing dust leakage in rotating equipment, characterized by: It includes an annular inner labyrinth seal (1), which is fitted onto a rotating shaft (2) and fixed to the rotating shaft. The outer ring of the inner labyrinth seal is fixed with several annular baffles (3) extending outward. An outer labyrinth seal (4) is provided outside the inner labyrinth seal. The outer ring of the outer labyrinth seal has mounting holes. The outer labyrinth seal is fixed to the housing of the rotating device (5) by bolts. The inner ring of the outer labyrinth seal has several annular grooves that are adapted to the baffles of the inner labyrinth seal. Each baffle on the inner labyrinth seal is placed in each groove of the outer labyrinth seal. The outer labyrinth seal body has several interconnected oil cavities, and the outer labyrinth seal body has an oil inlet (8) that is connected to the oil cavities; the oil cavities are filled with filler (7).

2. The shaft end sealing structure for preventing dust leakage in rotating equipment according to claim 1, characterized in that: The outer labyrinth seal is a split structure, that is, the outer labyrinth seal is a two-part structure, and the two split outer labyrinth seals are connected together by bolts.

3. The shaft end sealing structure for preventing dust leakage in rotating equipment according to claim 1 or 2, characterized in that: The filler inside the oil cavity of the external labyrinth seal is lithium-based grease dry oil filler.

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