Rotary oil seal of multi-head spiral oil return line

A technology of oil return line and spiral, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problem that the sealing performance cannot be effectively guaranteed, and achieve the purpose of improving service life, improving oil return capacity, and strong oil return capacity Effect
CN101701629AInactive Publication Date: 2010-05-05YANTAI RUNFUXIANG OIL SEAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANTAI RUNFUXIANG OIL SEAL
Publication Date
2010-05-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a rotary oil seal of a multi-head spiral oil return line, which comprises a rubber body, a skeleton and a seal lip. The rubber body, the skeleton and the seal lip are integrated, the seal lip is made from a polytetrafluoroethylene sheet, and the contact surface of the seal lip made from the polytetrafluoroethylene sheet and a shaft is provided with 2-7 spiral oil return lines of which the direction of rotation is in accordance with that of the shaft and intersected with the end of the polytetrafluoroethylene sheet for making the seal lip. By adopting the deign of multi-head helical line, the invention has the advantages of big oil return capability, reliable seal, long service life, energy conservation and environment protection, and is capable of preventing the entry of dust.
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Description

technical field

[0001] The invention belongs to the technical field of oil seals for rotary shafts, in particular to a polytetrafluoroethylene rotary oil seal used in environments with large changes in rotational speed. Background technique

[0002] At present, there are many application schemes for the design of PTFE (polytetrafluoroethylene) rotary oil seals. The lip design mainly adopts a single-head spiral oil return line, and its oil return capacity is determined by the shape and quantity of the spiral line. , due to its structure, from the failure analysis of the use process, oil leakage is still a basic performance, and the service life of the oil seal, that is, the sealing performance cannot be effectively guaranteed, which is mainly related to the design of the PTFE sealing lip. Especially closely related to the design of the lip line. Contents of the invention

[0003] The purpose of the present invention is to improve the deficiencies of the prior art and provi...

Claims

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