O-shaped seal ring of automobile fuel oil pump and manufacturing method thereof

Abstract

The invention discloses an O-shaped seal ring of an automobile fuel oil pump and belongs to the technical field of fuel oil pumps. The O-shaped seal ring of the automobile fuel oil pump comprises a seal ring body and a dustproof strip. The dustproof strip is fixedly connected to the back side of the seal ring body. A manufacturing method of the O-shaped seal ring of the automobile fuel oil pump comprises the following steps of rubber inner ring formation, snap cage fixation, injection molding and dustproof strip fixation. The O-shaped seal ring of the automobile fuel oil pump is provided withthe dustproof strip, so that during installation and use, external dust can be prevented from entering the O-shaped seal ring installation portion, and it is avoided that the dust enters the O-shapedseal ring and accelerates wear of the O-shaped seal ring; the seal ring body adopts multi-layer design and is provided with a cold-resistant outer sheath, so that the cold resistance of the O-shaped seal ring is greatly improved, and the O-shaped seal ring can be used under cold conditions; multiple snap cages are annularly arranged in the O-shaped seal ring, so that the O-shaped seal ring has good rebound resilience, when the O-shaped seal ring is used and squeezed for a long time, the O-shaped seal ring is not prone to generating permanent deformation, and the O-shaped seal ring can always keep good seal performance.

Description

technical field [0001] The invention relates to the technical field of fuel pumps, in particular to an O-shaped sealing ring of an automobile fuel pump and a preparation method thereof. Background technique [0002] The fuel pump usually consists of an electric motor, a pressure limiter, and a check valve. The electric motor actually works in the fuel inside the pump housing. Don't worry, because there is nothing in the housing to ignite. The fuel lubricates and cools the fuel motor. A check valve is installed at the port, and a pressure limiter is located on the pressure side of the oil pump housing with a channel leading to the oil inlet. [0003] Fuel pumps require a large number of seals during installation and use. Among them, O-ring seals are the most commonly used, because they are cheap, easy to manufacture, reliable in function, and have simple installation requirements. O-ring seals are the most common mechanical design for sealing. [0004] At present, when the f...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of automobile fuel pump O-ring and its preparation method, to solve the conventional fuel pump O-ring proposed in the above background technology, which has poor dustproof performance, poor cold resistance, and is prone to permanent The problem of sexual deformation

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