CN217271892U

CN217271892U - Waterproof dustproof seal assembly

Info

Publication number: CN217271892U
Application number: CN202220977558.5U
Authority: CN
Inventors: 袁野
Original assignee: Weiwan Technology Co ltd
Current assignee: Weiwan Technology Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-08-23
Anticipated expiration: 2032-04-26

Abstract

The utility model discloses a waterproof dustproof seal assembly, it includes annular sealed main part, O type circle elastomer and the ditch groove body, sealed main part is provided with and is used for with the sealed movable seal lip of piston rod, sealed main part is provided with the static seal lip, the static seal lip is sealed with the internal wall of ditch groove, static seal lip, the internal wall of ditch groove and sealed main part are formed with the parcel space that is used for inlaying and establishes O type circle elastomer, O type circle elastomer provides radial seal compelling force for movable seal lip, O type circle elastomer provides axial seal compelling force for the static seal lip. This application has the effect of extension sealing member life and promotion leakproofness.

Description

Waterproof dustproof sealing assembly

Technical Field

The application relates to the field of sealing members, in particular to a waterproof and dustproof sealing assembly.

Background

The pumping oil cylinder of the domestic concrete pump truck has the disadvantages of severe use condition, large rated working pressure of a hydraulic system, frequent reversing, large system impact, high vibration frequency and high working temperature, so the performance of the pumping oil cylinder directly influences the working performance of the whole machine, namely the pumping efficiency. The requirements for the matching sealing element applied to the pumping oil cylinder are correspondingly stricter.

The groove for installing the first waterproof dust ring in the main oil cylinder piston rod sealing system of the concrete pump truck is generally an open groove, a semi-closed groove and a closed groove. What the first waterproof dust ring of main hydro-cylinder of concrete pump car adopted on the existing market is MCS type dust sealing spare, and the slot is open slot, and what the main part adopted is polyurethane material and V type metal spring.

With respect to the related art among the above, the inventors consider that the following disadvantages are present: because the sealing element contains the metal spring, the sealing element can be contacted with water, sludge, dirt and the like frequently in the working process, the service lives of the sealing element and the V-shaped metal spring can be damaged, the V-shaped metal spring in the sealing element can be rusted by the water and the dirt, the V-shaped metal spring can be subjected to fatigue effect under the condition of unbalance loading, the service life of the V-shaped metal spring is shortened, and irreversible influence is caused on products.

SUMMERY OF THE UTILITY MODEL

In order to promote sealing performance and increase of service life, the application provides a waterproof dustproof seal assembly.

The application provides a waterproof dustproof seal assembly adopts following technical scheme:

the utility model provides a waterproof dustproof seal assembly, includes annular sealed main part, O type circle elastomer and the ditch groove body, sealed main part is provided with and is used for with the sealed dynamic seal lip of piston rod, sealed main part is provided with quiet seal lip, quiet seal lip is sealed with the internal wall of ditch groove, quiet seal lip, the internal wall of ditch groove and sealed main part are formed with the parcel space that is used for inlaying the O type circle elastomer of establishing, O type circle elastomer provides radial seal compelling power for dynamic seal lip, O type circle elastomer provides axial seal compelling power for quiet seal lip.

Optionally, the groove body is a semi-closed groove body, the sealing main body is provided with a dustproof auxiliary lip, the dustproof auxiliary lip is arranged between the static sealing lip and the dynamic sealing lip, and the dustproof auxiliary lip is abutted to the middle diameter surface of the semi-closed groove body.

Optionally, a dynamic seal auxiliary lip for sealing with the piston rod is arranged on one side, facing the piston rod, of the seal main body.

Optionally, the sealing main body is a polyurethane sealing body made of a polyurethane material.

Optionally, the O-ring elastic body is a rubber sealing ring made of a nitrile rubber material.

Optionally, a part of the dynamic seal lip in interference fit with the piston rod is provided with a sharp corner.

In summary, the present application includes at least one of the following beneficial technical effects:

one is as follows: the O-shaped ring elastomer is adopted, so that the elasticity is better, the compression permanent deformation resistance is stronger, the wear resistance is better, the radial sealing packing force can be effectively provided, the problems that the V-shaped metal spring is directly contacted with pollutants and is corroded and subjected to fatigue effect can be effectively solved, the O-shaped ring elastomer is wrapped in the polyurethane main body, the O-shaped ring elastomer cannot be directly contacted with the external environment to cause pollution, and the service life of the O-shaped ring elastomer is prolonged;

the second step is as follows: after the O-shaped ring elastic body is installed, the O-shaped ring elastic body in the groove body deforms, and the special static sealing lip enables the axial static sealing capacity of the sealing main body to be enhanced under the action of the deformed O-shaped ring elastic body, so that the sealing performance is better;

and thirdly: the dustproof auxiliary lip structure can reduce the influence of the external environment on the sealing performance, so that the sealing capability is stronger;

fourthly, the method comprises the following steps: the polyurethane material has oil resistance, strong water resistance and is not easy to oxidize and decay;

and fifthly: due to the adoption of the form of the sharp angle of the lip opening of the movable sealing lip, pollutants attached to the surface of the piston rod can be better scraped in a working environment, the pollutants are prevented from entering a sealing system, the sealing performance is damaged, and the service lives of other sealing elements in the sealing system are prolonged;

and the sixth step: the problem that the piston rod can have the unbalance loading in the vibrations of work can effectively be solved to the vice lip of dynamic seal, and after annular sealed main part installation, the vice lip of dynamic seal can produce certain interference with the piston rod, and elastic deformation can take place for the lip, has annular plane to produce, holds the piston rod tightly, improves piston rod reciprocating motion's ride comfort, reduces the angle of piston rod unbalance loading, also can improve the sealing member and follow the piston rod ability, improves sealing performance, improves sealing member life.

Drawings

Fig. 1 is a schematic cross-sectional view of a waterproof and dustproof sealing assembly disclosed in an embodiment of the present application.

Description of reference numerals: 1. a sealing body; 2. an O-ring elastomer; 3. a trench body; 31. the middle diameter of the groove; 32. the outer diameter of the groove; 4. a dynamic seal lip; 5. a dust-proof auxiliary lip; 6. a dynamic seal auxiliary lip; 7. a piston rod; 8. and a static seal lip.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses waterproof dustproof seal assembly.

Referring to fig. 1, a waterproof and dustproof sealing assembly comprises an annular sealing main body 1, an O-ring elastic body 2 and a groove body 3, wherein the groove body 3 is a semi-closed groove body 3, and the semi-closed groove body 3 is provided with a groove outer diameter 32 with a larger diameter and a groove middle diameter 31 with a smaller diameter.

The sealing main body 1 is provided with a dynamic sealing lip 4 used for sealing with a piston rod, the dynamic sealing lip 4 is integrally formed at a position, close to the inner ring, of one end face of the sealing main body 1, and the dynamic sealing lip 4 extends towards a direction departing from the bottom end face of the sealing main body 1 and the central axis of the sealing main body 1. The interference fit part of the movable sealing lip 4 and the piston rod is arranged in a sharp angle, and when the movable sealing lip is installed, a certain interference magnitude is generated between the movable sealing lip and the outer wall of the piston rod.

Sealing body 1 is provided with quiet seal lip 8, quiet seal lip 8 is toward deviating from 1 axis direction extension of sealing body, when the installation, quiet seal lip 8 produces certain interference magnitude with the inner wall of the ditch slot body 3, and be sealed cooperation, and set up inside sunken draw-in groove in one side that sealing body 1 deviates from its axis,

quiet seal lip

8, 3 external diameter inner walls of the slot body and draw-in groove are formed with the parcel space that is used for inlaying and establishes O type circle elastomer 2, after the installation, O

type circle elastomer

2 and 3 inner walls of the slot body are interference fit. O type circle elastomer 2 provides radial sealing packing force for moving seal lip 4, and O type circle elastomer 2 provides axial sealing packing force for static seal lip 8.

Sealing body 1 is provided with dustproof vice lip 5, and dustproof vice lip 5 sets up between static seal lip 8 and moving seal lip 4, and after the installation, dustproof vice lip 5 butt in the well footpath surface of half slot body 3 to dustproof vice lip 5 produces certain interference magnitude with the well footpath surface of half slot body 3, prevents that pollutant or water from entering into among the sealing system.

One side of the sealing main body 1 facing the piston rod is provided with a dynamic sealing auxiliary lip 6 used for sealing with the piston rod, the dynamic sealing auxiliary lip 6 is integrally formed on one side of the inner ring of the sealing main body 1 close to the bottom end face, and a deformation groove which is not contacted with the outer wall of the piston rod after installation is formed between the dynamic sealing lip 4 and the dynamic sealing auxiliary lip 6. The dynamic seal auxiliary lip 6 can generate certain interference with the piston rod, the lip can generate elastic deformation, an annular plane can be generated, the piston rod is held tightly, the smoothness of reciprocating motion of the piston rod is improved, the angle of unbalance loading of the piston rod is reduced, the capability of the seal main body 1 for following the piston rod can be improved, the sealing performance is improved, and the service life of a sealing element is prolonged.

The O-shaped ring elastic body 2 is a rubber sealing ring made of synthetic rubber-butadiene acrylonitrile rubber, the material and the performance can be reasonably guaranteed, the detection can be carried out according to the national GB1235-76 standard, the O-shaped ring elastic body is a mature product, the problem of difficult product purchase can be reduced, and the purchase cost can be reduced. The sealing body 1, the static sealing lip 8, the dynamic sealing lip 4 and the dynamic sealing auxiliary lip 6 are polyurethane sealing bodies made of polyurethane materials, and can be formed by mould injection molding or turning of a numerical control machine tool, and the polyurethane materials are oil-resistant, water-resistant and not easy to oxidize and decay. The O-shaped ring elastic body 2 is embedded in the polyurethane sealing body, so that the compression permanent deformation resistance of the polyurethane sealing body can be improved, the sealing performance and the service life of the polyurethane sealing body are improved, and the sealing ring is guaranteed to have excellent sealing performance in a low-pressure state.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a waterproof dustproof seal assembly which characterized in that: including annular sealing main body (1), O type circle elastomer (2) and the ditch groove body (3), sealing main body (1) is provided with and is used for moving seal lip (4) sealed with piston rod (7), sealing main body (1) is provided with quiet seal lip (8), quiet seal lip (8) are sealed with ditch groove body (3) inner wall, quiet seal lip (8), ditch groove body (3) inner wall and sealing main body (1) are formed with the parcel space that is used for inlaying O type circle elastomer (2), O type circle elastomer (2) are for moving seal lip (4) to provide radial seal packing power, O type circle elastomer (2) provide axial seal packing power for quiet seal lip (8).

2. The waterproof and dustproof seal assembly according to claim 1, wherein: the groove body (3) is a semi-closed groove body, the sealing main body (1) is provided with a dustproof auxiliary lip (5), the dustproof auxiliary lip (5) is arranged between the static sealing lip (8) and the dynamic sealing lip (4), and the dustproof auxiliary lip (5) is abutted to the middle diameter surface of the semi-closed groove body (3).

3. The waterproof and dustproof seal assembly according to claim 1, wherein: one side of the sealing main body (1) facing the piston rod (7) is provided with a dynamic sealing auxiliary lip (6) used for sealing with the piston rod (7).

4. The waterproof and dustproof seal assembly according to claim 1, wherein: the sealing main body (1) is a polyurethane sealing body made of a polyurethane material.

5. The waterproof and dustproof seal assembly according to claim 1, wherein: the O-shaped ring elastic body (2) is a rubber sealing ring made of a nitrile rubber material.

6. The waterproof and dustproof seal assembly according to claim 1, wherein: the movable sealing lip (4) and the interference fit part of the piston rod (7) are arranged in a sharp angle.