Rotor shaft sealing assembly

Abstract

A rotor shaft sealing assembly comprises a dynamic wear-resistant sealing ring and a static wear-resistant sealing ring, and the contact surfaces of the dynamic wear-resistant sealing ring and the static wear-resistant sealing ring are both of a stepped structure, so that the contact surfaces of the dynamic wear-resistant sealing ring and the static wear-resistant sealing ring form a stepped structure and form two sealing surfaces; therefore, a plane friction pair and a ring-ring friction pair are formed between the dynamic wear-resistant sealing ring and the static wear-resistant sealing ring; the ring-ring friction pair can realize sliding friction, rolling friction and rolling-sliding composite friction; rolling friction and plane friction can be formed between the moving ring and the static ring when equipment normally operates; the service life of the sealing element can be effectively prolonged; the rotor moves, the moving ring and the static ring are not pure rolling friction any more, and rolling and sliding composite friction can be formed; the composite friction mode can quickly adapt to changes caused by movement, and possible gaps are effectively filled through increase of friction force and self-adaptive adjustment of the sealing surface, so that leakage is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotor shaft sealing technical field, concretely is a rotor shaft sealing assembly. BACKGROUND

[0002] In modern industrial production, the rubber and plastic industry develops rapidly, and as the key equipment in the rubber and plastic mixing process, the mixer plays an important role. The mixer melts and shapes various raw materials, laying a solid foundation for the subsequent production process. In this complex and precise process, every part of the mixer plays an indispensable role, and the rotor shaft end sealing is particularly important. For users, the sealing effect of the rotor end face of the mixer is an important indicator of its performance. Poor sealing effect of the rotor end face can cause material and powder leakage, which not only changes the composition ratio of the rubber material, but also directly affects the quality and performance of the finished product, and also causes environmental pollution. Good sealing effect of the rotor shaft end can not only ensure the quality of the rubber material, but also improve the working environment of the operator. Therefore, the rotor shaft end sealing problem has always been the focus of users.

[0003] Currently, the rotor shaft end sealing of the mixer is formed by the contact of the dynamic ring and the static ring (attached Fig. 1-2 ). It is composed of a dynamic ring and a static ring, and the dynamic ring and the static ring are in relative sliding plane friction pair through external force. At the same time, high-pressure lubricating oil is injected between the dynamic ring and the static ring to form an oil film to bond and dilute the leaked dust and other materials and carry away the heat generated by the friction of the dynamic ring and the static ring. If a series of problems such as wear of the contact surface, rotor movement, lack of softening oil or sealing oil, uneven stress, etc. occur, it will cause leakage. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a rotor shaft sealing assembly capable of reducing the occurrence of shaft end sealing leakage.

[0005] The technical solution adopted by the utility model to solve the technical problem is:

[0006] A rotor shaft sealing assembly, comprising a dynamic wear-resistant sealing ring and a static wear-resistant sealing ring, the contact surface of the dynamic wear-resistant sealing ring and the static wear-resistant sealing ring is a stepped structure, so that the dynamic wear-resistant sealing ring and the static wear-resistant sealing ring form a stepped structure and form two sealing surfaces.

[0007] In one embodiment, the two sealing surfaces include a plane seal and an annular seal.

[0008] In one embodiment, the wear-resistant sealing ring and the static wear-resistant sealing ring form a two-step stepped structure.

[0009] In one embodiment, the dynamic wear-resistant sealing ring and the static wear-resistant sealing ring are arranged in a stepped manner and form two sealing surfaces, which can realize sliding friction, rolling friction and rolling-sliding combined friction.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention utilizes a stepped structure for both the dynamic and static wear-resistant sealing rings, creating two sealing surfaces: a planar seal and a ring seal. This results in not only a planar friction pair but also a ring-to-ring friction pair between the dynamic and static rings. The ring-to-ring friction pair can achieve sliding friction, rolling friction, and a combination of rolling and sliding friction. During normal operation, rolling and planar friction occur between the dynamic and static rings. This rolling friction is characterized by low friction and relatively low wear, effectively extending the service life of the seals. If the rotor experiences axial movement, the friction between the dynamic and static rings is no longer simple rolling friction but a combination of rolling and sliding friction. This combined friction mode can quickly adapt to changes caused by axial movement, effectively filling potential gaps through increased friction and adaptive adjustment of the sealing surfaces, thus preventing leakage. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of a planar seal formed by the contact between the dynamic ring and the stationary ring in the prior art;

[0013] Fig. 2 for Fig. 1 A schematic diagram of the enlarged structure of Part I;

[0014] Fig. 3 This is a schematic diagram of the structure of the two sealing surfaces of the dynamic wear-resistant sealing ring and the static wear-resistant sealing ring in Embodiment 1 of this utility model;

[0015] Fig. 4 This utility model Fig. 2 Dynamic wear-resistant sealing ring;

[0016] Fig. 5 This utility model Fig. 2 Static wear-resistant sealing ring and dynamic wear-resistant sealing ring.

[0017] In the diagram: 1. Dynamic ring, 2. Static ring, 10. Dynamic wear-resistant sealing ring, 20. Static wear-resistant sealing ring, 30. Flat sealing surface, 40. Annular sealing surface. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example 1

[0020] like Fig. 3-5 As shown, this embodiment includes a dynamic wear-resistant sealing ring 10 and a static wear-resistant sealing ring 20. The contact surfaces of the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20 are both stepped structures, so that the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20 form a stepped structure and form two sealing surfaces. In this embodiment, the step structure of the contact surfaces of the wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20 is two-step.

[0021] The two sealing surfaces include a planar sealing surface 30 and an annular sealing surface 40. In this embodiment, the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20 are arranged in a stepped manner and form two sealing surfaces to achieve sliding friction, rolling friction and rolling-sliding combined friction. That is, the vertical contact surface of the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20 is the planar sealing surface 30, and the transverse contact surface is the annular sealing surface 40.

[0022] Thus, by using a stepped structure for the contact surfaces of both the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20, a stepped structure is formed, creating two sealing surfaces. These two sealing surfaces include a planar sealing surface 30 and an annular sealing surface 40. Therefore, a planar friction pair and an annular sealing surface 40 (ring-to-ring friction pair) are formed between the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20. The ring-to-ring friction pair can achieve sliding friction, rolling friction, and a combination of rolling and sliding friction. During normal operation, the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20 will experience both rolling and planar friction. This rolling friction is characterized by low friction and relatively low wear, effectively extending the service life of the seals. If the rotor experiences axial movement, the dynamic wear-resistant sealing ring 10 and the static wear-resistant sealing ring 20 will no longer experience simple rolling friction, but rather a combination of rolling and sliding friction. This combined friction mode can quickly adapt to the changes caused by axial movement, effectively filling any gaps that may occur through increased friction and adaptive adjustment of the sealing surfaces, thereby preventing leakage. Therefore, even if the planar seal fails, the annular seal can still play its key sealing role after the stepped contact end face sealing structure is changed.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A rotor shaft seal assembly, characterized by: The dynamic wear-resistant sealing ring (10) and the static wear-resistant sealing ring (20) are stepped in structure, so that the dynamic wear-resistant sealing ring (10) and the static wear-resistant sealing ring (20) are stepped and form two sealing surfaces.

2. The rotor shaft seal assembly of claim 1, wherein: The two sealing surfaces include a planar sealing surface (30) and an annular sealing surface (40).

3. The rotor shaft seal assembly of claim 2, wherein: The dynamic wear-resistant sealing ring (10) and the static wear-resistant sealing ring (20) are stepped in structure, so that the dynamic wear-resistant sealing ring (10) and the static wear-resistant sealing ring (20) are stepped and form two sealing surfaces.

4. The rotor shaft seal assembly of claim 3, wherein: The dynamic wear-resistant sealing ring (10) and the static wear-resistant sealing ring (20) are stepped in structure, so that the dynamic wear-resistant sealing ring (10) and the static wear-resistant sealing ring (20) are stepped and form two sealing surfaces.

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