Sealing structure of nylon roller and nylon roller

Abstract

The utility model discloses a sealing structure of a nylon roller, comprising a sealing seat and a labyrinth sealing end cover, wherein a protruding sealing ring sleeve is formed on the inner side of the labyrinth sealing end cover, a sealing rubber ring is fixedly sleeved on the outer periphery of the sealing ring sleeve, a sealing retaining ring is positioned inside the sealing seat and abuts against the inner side of the sealing rubber ring, a bearing limiting ring platform is relatively provided on the inner side of the sealing retaining ring in the sealing seat, an annular groove and reinforcing ribs are provided on the other side of the sealing seat, and a nylon roller made by using the sealing structure of the nylon roller is also disclosed; the sealing rubber ring and the sealing retaining ring cooperate to exert less rotational resistance on the roller shaft, have less wear, and can avoid the phenomenon that the service life of the sealing rubber ring is shortened due to frictional heat generation, and at the same time, the close fit between the two can better play the effect of dustproof and waterproof; the sealing rubber ring and the sealing retaining ring are both arranged inside the sealing seat, so that the overall structure is more compact, and the design of the annular groove and the reinforcing ribs reduces the material consumption and the production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of rollers for belt conveyors, in particular to a sealing structure of a nylon roller and also to a nylon roller utilizing the sealing structure. Background Art

[0002] Belt conveyors are widely used in electricity, ports, building materials, docks, metallurgy, chemical industry, mining and other industries. They are the main carriers for transporting bulk materials. As the main components of belt conveyors, rollers are important structures used to support the materials carried on the conveyor belts and ensure the stable operation of the conveyor belts. Therefore, the quality of rollers and whether they are correctly selected play an important role in the service life, safe and stable operation and energy consumption of the entire belt conveyor.

[0003] During the operation of the conveyor belt, the roller is one of the main consumable parts and the single product with the largest demand in the belt conveyor. Therefore, the service life of the roller will directly affect the later investment cost of the conveyor. At first, the common supporting rollers on the belt conveyor were mostly steel products, but steel rollers have the disadvantage of poor corrosion resistance, so their service life is short when used in a humid environment. Later, in order to enable the rollers to operate normally for a long time in a humid environment, nylon rollers with good corrosion resistance and self-cleaning functions are often used. Nylon rollers have high wear resistance, ultra-low friction coefficient, ultra-high anti-stick performance, low noise, light weight, small rotation resistance, and good weather resistance and anti-aging characteristics.

[0004] In order to ensure that nylon rollers can operate stably for a long time, sealing facilities need to be installed at both ends. At present, the commonly used sealing methods for nylon rollers are single-channel labyrinth seals and labyrinth seals plus skeleton oil seals. Among them, the single-channel labyrinth seal has poor dust and water resistance, and it is difficult to meet the long-term protection of internal bearings in harsh and humid environments; the labyrinth seal plus skeleton oil seal combination has a better sealing effect, but the addition of skeleton oil seals increases the roller rotation resistance and the cost is relatively high. In addition, the friction resistance of nylon material is small, so it is very easy for the roller to run poorly. Therefore, it is necessary to make further improvements. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sealing structure of a nylon roller which is suitable for use in a humid environment with strong material adhesion and has high waterproof and dustproof performance.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a sealing structure of a nylon roller, comprising a sealing seat, one end of the sealing seat is fitted with a labyrinth sealing end cover, a coaxially arranged sealing assembly hole is provided through the sealing seat and the labyrinth sealing end cover, a protruding sealing ring sleeve is formed on the inner side of the labyrinth sealing end cover, a sealing rubber ring is fixedly sleeved on the outer periphery of the sealing ring sleeve, a sealing retaining ring is positioned inside the sealing seat and abutted against the inner side of the sealing rubber ring, a bearing limiting ring platform is provided inside the sealing seat and relatively to the inner side of the sealing retaining ring, an annular groove is provided on the side of the sealing seat opposite to the labyrinth sealing end cover, and reinforcing ribs are evenly distributed between the two groove walls of the annular groove.

[0007] As a preferred technical solution, the sealing rubber ring includes a sealing sleeve portion that cooperates with the sealing ring sleeve, and a trumpet-shaped sealing abutment portion is formed on the inner side of the sealing sleeve portion, and the end of the sealing abutment portion abuts against the surface of the sealing retaining ring.

[0008] As an improvement to the above technical solution, the sealing seat, the labyrinth sealing end cover and the sealing retaining ring are respectively configured as nylon structures.

[0009] The utility model also relates to a nylon roller, which utilizes the sealing structure of the nylon roller and comprises a nylon drum, a roller shaft is coaxially arranged penetrating the nylon drum, the sealing structure of the nylon roller is respectively arranged between the two ends of the nylon drum and the roller shaft, and roller bearings are respectively limitedly mounted on each of the bearing limiting rings, and the roller bearings are sleeved on the outer periphery of the roller shaft.

[0010] As a preferred technical solution, limit shaft grooves are respectively provided on the roller shaft between the sealing ring sleeve and the roller bearing and on the outer side of the labyrinth sealing end cover, and a limit retaining ring is correspondingly installed in each of the limit shaft grooves. The labyrinth sealing end cover is arranged to abut against the limit retaining ring arranged on the outer side thereof.

[0011] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects: the combination of the labyrinth sealing end cover and the sealing rubber ring takes into account dustproof and waterproof, the cooperation of the sealing rubber ring and the sealing retaining ring has a small rotational resistance to the roller shaft, small wear, and can avoid the phenomenon of shortening the service life of the sealing rubber ring due to frictional heat, and the close fit between the two can better play the role of dustproof and waterproof; the sealing rubber ring and the sealing retaining ring are both arranged inside the sealing seat and will not occupy additional assembly space, making the overall structure more compact and minimizing the size of the installation fit. The design of the annular groove and the reinforcing ribs reduces the material consumption to a certain extent while ensuring the strength of the sealing seat, thereby reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0013] Figure 1 It is a schematic cross-sectional structure diagram of the sealing structure of the nylon roller in the embodiment of the utility model;

[0014] Figure 2 It is a side view of the sealing structure of the nylon roller in the embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of a nylon roller in an embodiment of the utility model;

[0016] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0017] In the figure: 1-seal seat; 2-labyrinth seal end cover; 3-seal assembly hole; 4-annular groove; 5-reinforcement rib; 6-seal ring sleeve; 7-seal retaining ring; 8-seal sleeve part; 9-seal abutment part; 10-bearing limit ring platform; 11-nylon roller; 12-roller shaft; 13-roller bearing; 14-limit shaft groove; 15-limit retaining ring. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0019] like Figure 1 and Figure 2 As shown, the sealing structure of the nylon roller is used on a belt conveyor to achieve sealing between the roller and the roller shaft, and has good waterproof and dustproof effects, making it more suitable for materials with strong material adhesion and working in harsh and humid environments, which helps to increase the overall service life of the roller and reduce its operation and maintenance costs. Specifically, it includes a sealing seat 1, one end of the sealing seat 1 is fitted with a labyrinth sealing end cover 2, and a coaxially arranged sealing assembly hole 3 is provided through the sealing seat 1 and the labyrinth sealing end cover 2. An annular groove 4 is provided on the side of the sealing seat 1 opposite to the labyrinth sealing end cover 2, and reinforcing ribs 5 are evenly distributed between the two groove walls of the annular groove 4. The sealing seat 1 and the labyrinth sealing end cover 2 are both made by a casting molding process. With the cooperation of the annular groove 4 and the reinforcing ribs 5, the overall strength of the sealing seat 1 is guaranteed, and the use of casting materials can be saved, which is conducive to reducing production costs.

[0020] A protruding sealing ring sleeve 6 is formed on the inner side of the labyrinth sealing end cover 2, a sealing rubber ring is fixedly sleeved on the outer periphery of the sealing ring sleeve 6, and a sealing retaining ring 7 is limitedly abutted against the inner side of the sealing rubber ring in the sealing seat 1. The sealing seat 1, the labyrinth sealing end cover 2 and the sealing retaining ring 7 are respectively set as nylon structures, and can all be cast in one piece, which has a simple process and high production efficiency.

[0021] The sealing rubber ring includes a sealing sleeve portion 8 that fits with the sealing ring sleeve 6, and a trumpet-shaped sealing abutment portion 9 is formed on the inner side of the sealing sleeve portion 8. The end of the sealing abutment portion 9 abuts against the surface of the sealing retaining ring 7, that is, the sealing rubber ring as a whole is a VA-type sealing ring structure and is made of rubber material, which has the advantages of easy procurement and low cost. The sealing rubber ring and the sealing retaining ring 7 cooperate with each other to exert less resistance to the rotation of the roller, less wear, and can avoid the phenomenon of shortening the service life of the sealing rubber ring due to frictional heat generation. At the same time, the close fit between the two can better play a dustproof and waterproof effect. After the sealing rubber ring and the sealing retaining ring 7 are assembled, they are completely embedded in the sealing seat 1 on the inner side of the labyrinth sealing end cover 2, thereby avoiding occupying the external assembly space, making the overall structure more compact, and minimizing the size used for installation and matching.

[0022] A bearing limiting ring 10 is provided in the sealing seat 1 at the inner side of the sealing retaining ring 7 for mounting bearing accessories so as to facilitate assembly to form a roller structure.

[0023] like Figure 3 and Figure 4 As shown, a nylon idler utilizes the sealing structure of the nylon idler, including a nylon roller 11, a roller shaft 12 is coaxially provided through the nylon roller 11, and the sealing structure of the nylon idler is respectively provided between the two ends of the nylon roller 11 and the roller shaft 12, and roller bearings 13 are respectively limitedly installed on each of the bearing limiting rings 10, and the roller bearings 13 are sleeved on the outer periphery of the roller shaft 12. After assembly, the roller shaft 12 is encapsulated in the sealing seat 1, and with the cooperation of the labyrinth sealing end cover 2, the sealing rubber ring and the sealing retaining ring 7, the waterproof and dustproof effects are good, thereby reducing unnecessary friction between the roller shaft 12 and the roller bearing 13, helping to protect the roller bearing 13 and reduce its operation and maintenance and replacement frequency.

[0024] The roller shaft 12 is provided with a limit shaft groove 14 between the sealing ring sleeve 6 and the roller bearing 13 and on the outer side of the labyrinth seal end cover 2. A limit retaining ring 15 is correspondingly installed in each limit shaft groove 14. The labyrinth seal end cover 2 is arranged against the limit retaining ring 15 arranged on its outer side to form an axial limit for the roller bearing 13, making its rotation more stable. The roller shaft 12 can be made of a stainless steel shaft, which can increase the service life of the entire nylon roller under harsh working conditions.

[0025] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. The sealing structure of the nylon roller includes a sealing seat, which is characterized by: One end of the sealing seat is fitted with a labyrinth sealing end cover, a coaxial sealing assembly hole is provided through the sealing seat and the labyrinth sealing end cover, a protruding sealing ring sleeve is formed on the inner side of the labyrinth sealing end cover, a sealing rubber ring is fixedly fitted on the outer periphery of the sealing ring sleeve, a sealing retaining ring is positioned inside the sealing seat and abuts against the inner side of the sealing rubber ring, a bearing limiting ring platform is provided inside the sealing seat and opposite to the inner side of the sealing retaining ring, an annular groove is provided on the side of the sealing seat opposite to the labyrinth sealing end cover, and reinforcing ribs are evenly distributed between the two groove walls of the annular groove.

2. The sealing structure of the nylon roller according to claim 1, characterized in that: The sealing rubber ring comprises a sealing sleeve portion which is sleeved with the sealing ring sleeve, a bell-shaped sealing abutment portion is formed on the inner side of the sealing sleeve portion, and an end of the sealing abutment portion abuts against the surface of the sealing retaining ring.

3. The sealing structure of the nylon roller according to claim 1, characterized in that: The sealing seat, the labyrinth sealing end cover and the sealing retaining ring are respectively configured as nylon structures.

4. A nylon roller, characterized in that: The sealing structure of the nylon roller as claimed in any one of claims 1 to 3 comprises a nylon roller, a roller shaft is coaxially arranged through the nylon roller, sealing structures of the nylon roller are respectively arranged between the two ends of the nylon roller and the roller shaft, roller bearings are respectively limitedly mounted on each bearing limiting ring, and the roller bearings are sleeved on the outer periphery of the roller shaft.

5. The nylon roller according to claim 4, characterized in that: The roller shaft is located between the sealing ring sleeve and the roller bearing and on the outer side of the labyrinth sealing end cover, respectively, with a limiting shaft groove, and each limiting shaft groove is correspondingly equipped with a limiting retaining ring, and the labyrinth sealing end cover is arranged to abut against the limiting retaining ring arranged on the outer side thereof.

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