Water pump for engine cooling system
The water pump design with an oblique balance hole and flushing channels addresses issues of non-uniform fluidity and foreign matter accumulation, enhancing sealing performance and extending the service life of the water seal.
EP4143442B1Active Publication Date: 2025-09-17CATERPILLAR MOTOREN GMBH & CO KG
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Patent Information
- Application Number
- EP2021721830
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2020-04-30
- Filing Date
- 2021-04-16
- Publication Date
- 2025-09-17
- Estimated Expiration
- 2041-04-16
AI Technical Summary
Technical Problem
Existing water seals in engine cooling systems suffer from non-uniform fluidity, leading to local temperature rise, bubble accumulation, and damage from foreign particles, which affects cooling and lubrication, resulting in sealing failure.
Method used
A water pump design with an oblique balance hole in the impeller disc, radial flushing channels, and a venting channel to improve flow field distribution, prevent bubble and particle accumulation, and enhance lubrication and cooling effects.
Benefits of technology
Enhances sealing performance, prolongs the service life of the water seal, and reduces failure rates by improving fluid circulation and preventing foreign matter accumulation.
✦ Generated by Eureka AI based on patent content.
Abstract
The present utility model relates to a water pump for an engine cooling system. The water pump comprises: a water pump housing defining a water sealing hole; a pump shaft rotatably supported in the water pump housing; a water seal sleeved on the pump shaft and positioned in the water sealing hole; an impeller sleeved on the pump shaft and close to the water seal, the impeller comprising a disc, blades arranged on a side of the disc away from the water seal, and at least one balance hole penetrating both end sides of the disc, wherein a central axis of the balance hole is coplanar with a central axis of the pump shaft and inclined at a certain angle with respect to the axis of the pump shaft, and a radial distance of a point on the central axis of the balance hole from the axis of the pump shaft gradually decreases as the point approaches the water seal. The water pump according to the utility model has an improved effect of cooling and lubricating the water seal.
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