Labyrinth sealing device for main bearing of roller press
By combining a labyrinth seal structure with lubricating grease, the problem of dust entering the traditional roller press seal structure is solved, achieving effective sealing of the bearing and extending its service life.
Patent Information
- Application Number
- CN202520830951.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-29
AI Technical Summary
Traditional roller press sealing structures cannot effectively prevent dust from entering the bearing, leading to wear of the seal ring and damage to the bearing.
The labyrinth seal structure is adopted, which forms a labyrinth seal through the serrated annular protrusions of the end cap and the sealing ring. When used with grease, it ensures that the bearing oil cavity maintains outward tension, prevents impurities from entering, and forms a sealing oil layer during rotation.
It effectively prevents impurities from entering the bearing, extends the bearing's service life, and improves the sealing effect.
Smart Images
Figure CN223938484U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of roller press technology, specifically to a labyrinth seal device for the main bearing of a roller press. Background Technology
[0002] Roller presses are high-efficiency and energy-saving grinding equipment, widely used in the cement, metallurgy, and mining industries. Traditionally, the end face seals between the bearing housing and the roller press main shaft are achieved by directly installing lip seals on the main shaft, or by combining lip seals with V-type end face seals. However, since there is no pressure difference between the sealing cavity and the outside, the seals wear down over time as the roller press runs, allowing dust to enter and causing wear and damage to the roller shaft or bearings. Summary of the Invention
[0003] The purpose of this invention is to provide a labyrinth seal device for the main bearing of a roller press, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a labyrinth sealing device for the main bearing of a roller press, comprising a roller shaft, a self-aligning roller bearing mounted on the outer cylindrical surface of the roller shaft, a bearing housing mounted on the outer cylindrical surface of the self-aligning roller bearing, an end cover mounted on the bearing housing, a sealing ring mounted on the outer cylindrical surface of the roller shaft, and an end face sealing ring mounted on the outer cylindrical surface of the sealing ring.
[0005] Preferably, the end cap has a serrated annular protrusion on its side, and the end cap is installed on the bearing seat by bolts.
[0006] Preferably, the sealing ring has a serrated annular protrusion on its side, and a labyrinth sealing structure is formed between the side protrusion of the sealing ring and the side protrusion of the end cap. The sealing ring is installed on the roller shaft by interference fit.
[0007] Preferably, the labyrinth sealing structure contains lubricating grease.
[0008] Preferably, the end face sealing ring is installed on the sealing ring by interference fit, and the end face sealing ring is pressed against the side of the end cover by the sealing ring, and the end face sealing ring and the side of the end cover are subject to sliding friction.
[0009] Preferably, the inner ring of the self-aligning roller bearing is mounted to the roller shaft via an interference fit.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] By using the fit of the labyrinth seal components, the bearing oil cavity is always kept under outward tension, which effectively prevents impurities from entering the bearing. At the same time, the labyrinth seal structure forms a sealing oil layer during bearing rotation and retains space for the self-aligning roller bearing to swing, thus improving the bearing's service life. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;
[0014] Figure 3 This is a schematic diagram of the end cap structure of this utility model;
[0015] Figure 4 This is a schematic diagram of the sealing ring structure of this utility model.
[0016] In the diagram: 1. Roller shaft; 2. Self-aligning roller bearing; 3. Bearing housing; 4. End cover; 5. Sealing ring; 6. End face sealing ring. Detailed Implementation
[0017] 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.
[0018] Please see Figure 1-4 This utility model provides a technical solution: a labyrinth sealing device for the main bearing of a roller press, including a roller shaft 1, a self-aligning roller bearing 2 mounted on the outer cylindrical surface of the roller shaft 1, a bearing housing 3 mounted on the outer cylindrical surface of the self-aligning roller bearing 2, an end cover 4 mounted on the bearing housing 3, a sealing ring 5 mounted on the outer cylindrical surface of the roller shaft 1, and an end face sealing ring 6 mounted on the outer cylindrical surface of the sealing ring 5. A labyrinth sealing structure is provided between the end cover 4 and the sealing ring 4. Through the cooperation of the parts of the labyrinth sealing structure, the bearing oil cavity is always kept under outward tension, which can effectively prevent impurities from entering the bearing. At the same time, the labyrinth sealing structure forms a sealing oil layer during the rotation of the bearing and retains space for the self-aligning roller bearing to swing.
[0019] In this utility model, the end cover 4 has a serrated annular protrusion on its side. The end cover 4 is installed on the bearing seat 3 by bolts. The end cover 4 and the bearing seat 3 are in a stationary state.
[0020] In this utility model, the sealing ring 5 has a serrated annular protrusion on its side. The protrusion on the side of the sealing ring 5 and the protrusion on the side of the end cover 4 form a labyrinth sealing structure. The sealing ring 5 is installed on the roller shaft 1 by interference fit. The sealing ring 5 and the roller shaft 1 rotate together.
[0021] In this invention, the labyrinth seal structure contains lubricating grease, which reduces the entry of external impurities into the interior; the labyrinth seal has a space inside to prevent collision between the sealing ring and the end cap when the self-aligning roller bearing swings.
[0022] In this utility model, the end face sealing ring 6 is installed on the sealing ring 5 by interference fit and rotates together with the sealing ring 5 and the roller 1. The end face sealing ring 6 is pressed against the side of the end cover 4 by the sealing ring 5, thereby ensuring that the bearing is in a closed oil cavity, and the grease in the oil cavity always maintains an outward tension, which can effectively prevent impurities from entering the bearing. The end face sealing ring 6 and the side of the end cover 4 are in sliding friction.
[0023] In this invention, the inner ring of the self-aligning roller bearing 2 is mounted on the roller shaft 1 by an interference fit, and the inner ring of the self-aligning roller bearing 2 rotates together with the roller shaft; the outer ring of the self-aligning roller bearing 2 and the bearing housing are in a stationary state.
[0024] The working principle of this utility model is as follows: A labyrinth seal structure is formed between the serrated annular boss on the side of the end cap and the serrated annular boss on the side of the sealing ring. The labyrinth seal structure is filled with grease. The sealing ring is installed on the roller shaft with an interference fit and rotates together with the roller shaft. Through the cooperation of the parts of the labyrinth seal structure, the bearing oil cavity is always kept under outward tension, which can effectively prevent impurities from entering the bearing. At the same time, the labyrinth seal structure forms a sealing oil layer during the bearing rotation and retains space for the self-aligning roller bearing to swing, thereby improving the bearing service life.
[0025] The contents not described in detail in this specification are prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A labyrinth seal device for the main bearing of a roller press, characterized in that: The roller shaft (1) is equipped with a self-aligning roller bearing (2) on its outer cylindrical surface. The self-aligning roller bearing (2) is equipped with a bearing housing (3) on its outer cylindrical surface. An end cap (4) is installed on the bearing housing (3). A sealing ring (5) is installed on the outer cylindrical surface of the roller shaft (1). An end face sealing ring (6) is installed on the outer cylindrical surface of the sealing ring (5).
2. The labyrinth seal device for the main bearing of a roller press according to claim 1, characterized in that: The end cap (4) has a serrated annular protrusion on its side and is bolted to the bearing seat (3).
3. The labyrinth seal device for the main bearing of a roller press according to claim 1, characterized in that: The sealing ring (5) has a serrated annular protrusion on its side. The protrusion on the side of the sealing ring (5) and the protrusion on the side of the end cap (4) form a labyrinth sealing structure. The sealing ring (5) is installed on the roller shaft (1) by interference fit.
4. The labyrinth seal device for the main bearing of a roller press according to claim 3, characterized in that: The labyrinth sealing structure contains lubricating grease.
5. The labyrinth seal device for the main bearing of a roller press according to claim 1, characterized in that: The end face sealing ring (6) is installed on the sealing ring (5) by interference fit. The end face sealing ring (6) is pressed against the side of the end cover (4) by the sealing ring (5). The end face sealing ring (6) and the side of the end cover (4) are in sliding friction.
6. The labyrinth seal device for the main bearing of a roller press according to claim 1, characterized in that: The inner ring of the self-aligning roller bearing (2) is mounted on the roller shaft (1) by an interference fit.