A crankcase front oil seal and assembly
By designing a front oil seal of a metal crankcase and combining with the maze-like bending structure of the connecting flange, the problems of air leakage, oil leakage and water leakage in the crankcase of the diesel engine are solved, and the oil mist is closed and reflux is achieved, and reliability and wear resistance are improved.
CN111927956BActive Publication Date: 2025-03-25CHONGQING WEICHAI ENGINE FACTORY +1
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Patent Information
- Application Number
- CN202010916736.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-09-03
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2040-09-03
AI Technical Summary
Technical Problem
The crankcase in diesel engines has problems of air, oil and water leakage. The existing labyrinth ring oil seal structure is prone to aging, wear, and is difficult to assemble and has high cost.
Method used
A crankcase front oil seal is designed, made of metal, through the inner wall surface, epitaxial edge, vertical oil passage and groove structure, combined with the maze-like bending structure of the coupling flange, to achieve the sealing and return of oil mist.
Benefits of technology
The sealing and separation of oil mist is achieved, and the oil flows back to the oil pan, eliminating rubber parts and spacer rings that are prone to aging and wear are eliminated, making it easy to assemble, and improving reliability and wear resistance.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention belongs to the technical field of engine sealing accessories, and discloses a crankcase front oil seal and assembly, aiming to solve the problems that the skeleton oil seal is not wear-resistant and the rubber seal is easy to age. The front oil seal has an inner wall surface that is gap-matched with the outer wall of the connecting flange, an outer extension edge that is fixedly connected to the front end case of the crankcase, and a vertical oil passage that is connected to the crankcase and arranged in the outer extension edge. The outer wall of the sealing side of the front oil seal is provided with a first groove, and a second groove, a third groove and a fourth groove are provided in sequence along the axial direction of the inner wall surface and from the sealing side of the front oil seal to the non-sealing side. The vertical oil passage is also connected to the third groove. The crankcase front oil seal of the present invention reduces the number of parts and components, and is easy to process and assemble. Its mechanical sealing structure is not easy to wear and has high reliability.
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