Anti-drop axial seal assembly and forming method

Abstract

The application discloses a falling-prevention axial sealing assembly and a forming method, which comprises an axial component, a groove and a sealing element, and further comprises the following: the groove is on the axial component, and the opening line diameter of the cross section of the groove is smaller than the waist line diameter of the groove; the groove is used for locking the sealing element; a part of the sealing element fills the groove; and another part of the sealing element is exposed outside to play a sealing role. The technical scheme can lock the elastic body on the shaft while the elastic body plays a sealing role, and solves the problems of falling and extrusion of the sealing element during relative movement of the axial component. The sealing element and the axial component are free of installation, and the surface of the sealing element will not be scratched, and the sealing element will not have installation residual stress. The application is convenient to produce and process, and can improve the sealing effect under harsh working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elastomer sealing, in particular to a falling-prevention axial sealing assembly and a forming method. BACKGROUND

[0002] The axial sealing is a sealing required for the gap between the shaft and the cavity when the shaft is reciprocated or rotated, which prevents the medium from leaking and prevents foreign matters from entering, and is widely used in many fields.

[0003] At present, the sealing element is clamped on the shaft mainly through interference installation, and the sealing element can still move after installation. Once the sealing element is extruded out of the groove, the sealing will fail. In addition, the existing sealing element needs an installation process, and the sealing surface is often damaged to cause failure. This installation method also produces installation residual stress. The traditional sealing element limits the further development of related equipment to high parameters, and a sealing element that can be used in high-speed motion and high-pressure occasions needs to be developed. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a falling-prevention axial sealing assembly and a forming method, which can prevent the sealing from falling off.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a falling-prevention axial sealing assembly, comprising an axial component (1), a groove (2), and a sealing element (3), further comprising: the groove (2) is on the axial component (1), and the opening line diameter of the cross section of the groove (2) is smaller than the waist line diameter of the groove (2); the groove (2) is used for locking the sealing element (3); a part of the sealing element (3) fills the groove (2); and another part of the sealing element (3) is exposed outside to play a sealing role.

[0006] In a preferred embodiment, the axial component (1) comprises a shaft and a cavity; when the axial component (1) is the shaft, the groove (2) is located on the outer surface of the shaft; and when the axial component (1) is the cavity, the groove (2) is located on the inner surface of the cavity.

[0007] In a preferred embodiment, the number of the groove (2) and the sealing element (3) is equal and not less than 1.

[0008] In a preferred embodiment, the cross-sectional shape of the exposed part of the sealing element (3) comprises a semicircle, a triangle, and a quadrilateral.

[0009] In a preferred embodiment, the material of the sealing element (3) comprises rubber, resin, and a material formed by a molecular chain cross-linking reaction.

[0010] The present application provides a falling-prevention axial sealing forming method, which adopts the above-mentioned falling-prevention axial sealing assembly and comprises the following steps:

[0011] 1) machining a groove on an axial component, the opening line diameter of the cross section of the groove being smaller than the waist line diameter of the groove;

[0012] 2) preparing a dismountable mold, the mold having a sealing ring cavity and a glue injection channel, and the mold dismounting line being located on the sealing ring cavity;

[0013] 3) assembling the axial component with the groove and the mold, and aligning the groove with the glue injection channel;

[0014] 4) injecting glue with a certain temperature T1 into the mold channel, and allowing the glue to flow and fill the cavity;

[0015] 5) heating, heating the glue to a cross-linking reaction temperature T2 and keeping for a certain time;

[0016] 6) cooling, cooling the axial sealing to T3;

[0017] 7) opening the mold, obtaining the anti-falling axial sealing.

[0018] In a preferred embodiment, the temperature T1 satisfies 25℃≤T1

[0019] In a preferred embodiment, the temperature T3 is less than 25℃.

[0020] In a preferred embodiment, the heating mode includes heat conduction and heat radiation.

[0021] Compared with the prior art, the present application has the following beneficial effects: the present application can lock the sealing part on the shaft while the sealing part plays a sealing role, solving the problems of falling and extrusion of the sealing part during relative movement of the axial component; the bottom of the sealing part has no leakage channel, reducing one leakage surface. The present application is free of installation between the sealing part and the axial component, and the surface of the sealing part will not be scratched, and the internal part of the sealing part will not have installation residual stress; the present application is convenient to produce and process, and can improve the sealing effect in harsh working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a schematic diagram of an anti-falling axial sealing structure for a shaft in embodiment 1 of the present application.

[0023] Figure 2 FIG. 2 is a schematic diagram of a forming method flow of an anti-falling axial sealing in embodiment 1 of the present application.

[0024] Figure 3 FIG. 3 is a schematic diagram of an anti-falling axial sealing structure for a cavity in embodiment 2 of the present application.

[0025] Figure 4 FIG. 4 is a schematic diagram of a forming method flow of an anti-falling axial sealing for a cavity in embodiment 2 of the present application.

[0026] Figure: 1 - axial component; 2 - groove; 3 - sealing element. DETAILED DESCRIPTION

[0027] The application will be further described below with reference to the accompanying drawings and examples.

[0028] It should be noted that the following detailed description is illustrative only and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it is further to be understood that the terms "comprising", "including", and / or "containing" when used herein, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof.

[0030] In one embodiment of the application, as shown in Figure 1 the anti-falling axial seal for shafts comprises an axial component (1), a groove (2) and a sealing element (3), the groove (2) is on the axial component (1), the opening line diameter of the cross section of the groove (2) is smaller than the waist line diameter of the groove (2), the groove (2) is used to lock the sealing element (3), one part of the sealing element (3) fills the groove (2), and the other part of the sealing element (3) is exposed to the outside to play a sealing role.

[0031] Specifically, the axial component (1) is a shaft, the groove (2) is located on the outer surface of the shaft, the number of the groove (2) and the sealing element (3) is equal and is one, the cross-sectional shape of the exposed part of the sealing element (3) is semicircular, and the material of the sealing element (3) is ethylene-propylene-diene rubber.

[0032] The forming method of the anti-falling axial seal for shafts, as shown in Figure 2 comprises the following steps:

[0033] processing the groove on the shaft, the opening line diameter of the cross section of the groove is smaller than the waist line diameter of the groove;

[0034] preparing a disassembled mold, the mold has a sealing ring cavity and a glue injection channel, and the disassembly line of the mold is located on the sealing ring cavity;

[0035] assembling the shaft with the groove and the mold, and aligning the groove with the glue injection channel;

[0036] injecting glue at 80°C into the mold channel to make the glue flow and fill the cavity;

[0037] Heating, heating the rubber to a cross-linking reaction temperature of 175°C for 10 min;

[0038] Cooling, cooling the axial seal to 20°C;

[0039] Opening the mold, obtaining the anti-falling axial seal.

[0040] The heating method is heat conduction.

[0041] In one embodiment of the application, as shown in Figure 3 The anti-falling cavity axial seal includes an axial component (1), a groove (2), and a sealing element (3). The groove (2) is on the axial component (1), and the opening line diameter of the groove (2) cross-section is smaller than the waist line diameter of the groove (2). The groove (2) is used to lock the sealing element (3). One part of the sealing element (3) fills the groove (2), and the other part of the sealing element (3) is exposed externally to play a sealing role.

[0042] Specifically, the axial component (1) is a cavity, the groove (2) is located on the outer surface of the shaft, the number of the groove (2) and the sealing element (3) is equal and is 1, the cross-sectional shape of the exposed part of the sealing element (3) is semicircular, and the material of the sealing element (3) is natural rubber.

[0043] The anti-falling cavity axial seal forming method, as shown in Figure 4 includes the following steps:

[0044] Processing a groove on the cavity, and the opening line diameter of the groove cross-section is smaller than the waist line diameter of the groove;

[0045] Preparing a detachable mold, which has a sealing ring cavity and a rubber injection channel. The mold disassembly line is located on the sealing ring cavity;

[0046] Assembling the cavity with a groove and the mold, and aligning the groove with the rubber injection channel;

[0047] Injecting rubber at 80°C into the mold channel to make the rubber flow and fill the cavity;

[0048] Heating, heating the rubber to a cross-linking reaction temperature of 160°C for 15 min;

[0049] Cooling, cooling the axial seal to 0°C;

[0050] Opening the mold, obtaining the anti-falling axial seal.

[0051] The heating method is microwave heating.

[0052] The above-described techniques can be described with reference to the following drawings, which are hereby incorporated into and made part of this application. These drawings illustrate implementations of the described embodiments and are not intended to limit the scope of the described embodiments. The drawings provided are intended to demonstrate various implementations of the described embodiments and are not intended to limit the scope of the described embodiments. For example, the sequences of operations (or the sequences of any other process) described in connection with the diagrams can be changed, eliminated, or combined with other operations in various ways. Embodiments are described with reference to the drawings, in which like reference characters are used to refer to like elements throughout.

[0053] Additionally, the terminology used in the description presented above is intended to be interpreted in an illustrative manner rather than a limiting manner. Thus, the above description of the described embodiments is presented for the purpose of illustration and description. The described embodiments presented in the above description as well as the examples disclosed in the above description are provided as separate examples to add context and to aid in the understanding of the described embodiments. The above description is not intended to be exhaustive or to limit the described embodiments to the precise forms disclosed. Many modifications, adaptations, and variations are possible in light of the above teachings. In some instances, well-known processes and techniques have not been described in detail in order to avoid unnecessarily obscuring the described embodiments. Accordingly, the above description is meant to be taken only by way of example and is not to be taken limiting the claimed subject matter.

[0054] The principles and implementations of the present application are described in the detailed description of the application. The above description of the embodiments is only to help understand the method and its core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

[0055] The content described in the embodiments of the specification is only a list of implementation forms of the inventive concept, and the protection scope of the present application should not be regarded as being limited to the specific forms stated in the embodiments. The protection scope of the present application also includes equivalent technical means that can be thought of by those skilled in the art according to the inventive concept.

Claims

1. Anti-falling axial seal forming method, characterized in that: An anti-drop-off axial sealing assembly is used, the anti-drop-off axial sealing assembly comprising an axial component (1), a groove (2), and a sealing member (3), further comprising: the groove (2) being on the axial component (1) and having an opening diameter of a cross section of the groove (2) being smaller than a waist diameter of the groove (2), the groove (2) being used to lock the sealing member (3), a portion of the sealing member (3) being filled with the groove (2), and another portion of the sealing member (3) being exposed to the outside to perform a sealing function; The process includes the following steps: 1) Processing grooves on axial parts, the opening diameter of the groove section is smaller than the waist diameter of the groove; 2) Prepare a disassembly mold with a sealing ring cavity and a rubber injection channel. The mold disassembly line is located on the sealing ring cavity. 3) Assemble the grooved axial component with the mold, aligning the groove with the rubber injection channel; 4) Inject the rubber with a certain temperature T1 into the mold channel and let the rubber flow to fill the cavity; 5) Heating: heating the rubber material to the cross-linking reaction temperature T2 and maintaining it for a certain period of time; 6) Cooling: Cool the axial seal to T3; 7) Open the mold to obtain an anti-fall axial seal.

2. The anti-falling axial seal forming method according to claim 1, characterized in that: The temperature T1 satisfies 25°C≤T1<T2.

3. The anti-falling axial seal forming method according to claim 1, characterized in that: The temperature T3 is less than 25°C.

4. The anti-falling axial seal forming method according to claim 1, characterized in that: Heating methods include heat conduction and heat radiation.

5. The anti-falling axial seal forming method according to claim 1, characterized in that: The axial component (1) comprises a shaft and a cavity; when the axial component (1) is a shaft, the groove (2) is located on the outer surface of the shaft; when the axial component (1) is a cavity, the groove (2) is located on the inner surface of the cavity.

6. The method for forming an anti-falling axial seal according to claim 1, characterized in that: The number of the grooves (2) and the number of the sealing members (3) are equal and no less than one.

7. The method for forming an anti-falling axial seal according to claim 1, characterized in that: The cross-sectional shape of the exposed portion of the seal (3) includes a semicircle, a triangle, and a quadrilateral.

8. The method for forming an anti-falling axial seal according to claim 1, characterized in that: The material of the sealing member (3) includes rubber, resin, and a material formed by a molecular chain cross-linking reaction.

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