CN218267234U - A composite sealing lip valve oil seal - Google Patents

Abstract

The utility model provides a composite sealing lip valve oil seal, which comprises a metal skeleton ring, a rubber body, and an oil seal spring; the upper port of the metal skeleton ring is provided with an inner closing card platform, and the rubber body is made of fluorine rubber, and the rubber body includes Sealing lip, oil storage lip, rubber sleeve inside the ring; the sealing lip is located above the upper port of the metal skeleton ring, the oil storage lip is located inside the inner closing card platform of the metal skeleton ring, and the rubber sleeve inside the ring is attached to the metal skeleton ring On the inner wall; the oil seal spring is installed on the outside of the sealing lip; the section of the sealing lip is in an inclined shape with the upper port shrinking inward, and a polytetrafluoroethylene film is attached to the inner surface of the sealing lip; the back end of the polytetrafluoroethylene film is connected to the A V-shaped groove that can store a small amount of lubricating oil is formed between the oil storage lips; the inner wall of the rubber sleeve in the ring is provided with concave-convex corrugations that are horizontally distributed around. The utility model has the advantages of strong wear resistance, low wear, good sealing effect, long service life and easy assembly and disassembly.

Description

A composite sealing lip valve oil seal

technical field

The utility model relates to the technical field of mechanical seals, in particular to a composite sealing lip valve oil seal.

Background technique

The valve oil seal is one of the most important parts of the engine valve assembly, which prevents the oil from entering the intake and exhaust pipes, prevents the mixture of gasoline and air and the leakage of exhaust gas, and prevents the engine oil from entering the combustion chamber. The valve oil seal is in contact with gasoline and engine oil at high temperature, the working environment is harsh, and it also needs to reciprocate continuously at high frequency, the wear speed is fast, and the service life is short. Most of the valve oil seals in the prior art are formed by pressing and vulcanizing a single material of rubber. The rubber sealing ring is not wear-resistant, and long-term use is likely to cause problems such as poor sealing, loss of engine oil, frequent maintenance, and environmental pollution. In addition, the surface of the rubber layer attached to the inner wall of the metal frame is flat, and the space for installing the conduit is limited, and the rubber has no room for flow and deformation. The resistance is large, and the frame is easy to expand and deform, which increases the difficulty of installing and disassembling the valve oil seal. Therefore, it is necessary to provide a new composite sealing lip valve oil seal to solve the above technical problems.

Contents of the invention

The technical problem solved by the utility model is to provide a composite sealing lip valve oil seal, which has the advantages of strong wear resistance, low wear, good sealing effect, long service life and easy disassembly.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A composite sealing lip valve oil seal, characterized in that it includes a metal skeleton ring, a rubber body, and an oil seal spring; the upper port of the metal skeleton ring is provided with an inner closing card platform, the rubber body is made of fluorine rubber, and the rubber body includes a seal Lip, oil storage lip, rubber sleeve inside the ring; the sealing lip is located above the upper port of the metal skeleton ring, the oil storage lip is located inside the inner closing card platform of the metal skeleton ring, and the rubber sleeve inside the ring is attached to the inner wall of the metal skeleton ring Above; there is a spring groove on the outer surface of the sealing lip, and the oil seal spring is installed in the spring groove; the section of the sealing lip is in an inclined shape in which the upper port shrinks inward, and a polytetrafluoroethylene film layer is attached to the inner surface of the sealing lip; A V-shaped groove that can store a small amount of lubricating oil is formed between the rear end of the polytetrafluoroethylene film layer and the oil storage lip.

Further, the inner wall of the rubber sleeve in the ring is provided with concavo-convex corrugations horizontally distributed around.

The main sealing part of the utility model adopts the method of compounding the sealing lip made of fluororubber material and the polytetrafluoroethylene film layer. The sealing lip made of fluororubber material has good tear resistance and pressure change resilience, and the polytetrafluoroethylene film layer High self-lubrication, wear resistance, high and low temperature resistance, this structure can make the valve oil seal have better sealing effect and longer service life. The V-shaped groove between the rear end of the polytetrafluoroethylene film and the oil storage lip can store a small amount of lubricating oil, which improves the self-lubricating effect of the valve oil seal. The concave-convex corrugation of the inner wall of the rubber sleeve in the ring reduces the tightness of the rubber body to the valve guide, which facilitates the installation and removal of the valve oil seal.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

Fig. 2 is a schematic diagram of the use state of the utility model.

The names of the corresponding parts in the figure are: 1 metal skeleton ring; 2 oil seal spring; Corrugation; 100 valve stem; 101 valve guide.

detailed description

In order to have a clearer understanding of the technical features, purpose and effects of the utility model, the specific implementation, structure and features of the utility model are described in detail below in conjunction with the accompanying drawings and preferred embodiments. However, the accompanying drawings are only for reference and description, and are not intended to limit the present invention.

Please refer to Figure 1-2, the utility model provides a composite sealing lip valve oil seal, which includes a metal skeleton ring 1, a rubber body, and an oil seal spring 2; The rubber body is made of fluorine rubber, and the rubber body includes a sealing lip 4, an oil storage lip 5, and an inner rubber sleeve 6; the sealing lip 4 is located above the upper port of the metal skeleton ring 1, and the oil storage lip 5 is located on the metal skeleton ring On the inner side of the card table 3 of the inner mouth, the rubber sleeve 6 in the ring is attached to the inner wall of the metal skeleton ring 1; a spring groove is provided on the outer surface of the sealing lip 4, and the oil seal spring 2 is installed in the spring groove; the sealing lip 4 The cross-section is in an inclined shape with the upper port shrinking inward, and a polytetrafluoroethylene film layer 7 is attached to the inner surface of the sealing lip 4; a micro-lubrication can be stored between the rear end of the polytetrafluoroethylene film layer 7 and the oil storage lip 5 V-shaped grooves for oil. The inner wall of the rubber sleeve in the ring is provided with concavo-convex corrugations 8 that are horizontally distributed around.

Based on the composite sealing lip valve oil seal designed with the above structure, the metal skeleton ring 1 plays the role of installation and fixing, and the polytetrafluoroethylene film layer 7 is in contact with the valve stem 100 to play a sealing role. The valve guide 101 is inserted into the inner rubber sleeve 6 of the ring.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (2)

1. The utility model provides a compound seal lip valve oil seal which characterized in that: comprises a metal framework ring, a rubber body and an oil seal spring; an inner closing-up clamping table is arranged at the upper end opening of the metal framework ring, the rubber body is made of fluororubber, and the rubber body comprises a sealing lip, an oil storage lip and an in-ring rubber sleeve; the sealing lip is positioned above the upper port of the metal framework ring, the oil storage lip is positioned on the inner side of the inner closing port clamping table of the metal framework ring, and the rubber sleeve in the ring is attached to the inner wall of the metal framework ring; the outer side surface of the sealing lip is provided with a spring groove, and the oil sealing spring is arranged in the spring groove; the section of the sealing lip is in an inclined shape with an upper port shrinking inwards, and a polytetrafluoroethylene film layer is attached to the inner side surface of the sealing lip; a V-shaped groove capable of storing a trace amount of lubricating oil is formed between the rear end of the polytetrafluoroethylene film layer and the oil storage lip.

2. The composite seal lip valve oil seal according to claim 1, characterized in that: the inner wall of the rubber sleeve in the ring is provided with concave-convex ripples which are horizontally distributed in a surrounding way.

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