Oil return structure for cooling fan

Abstract

The invention discloses an oil return structure for a cooling fan. The oil return structure for the cooling fan comprises a base frame, a bearing, a stator, fan blades and a rotor, wherein the bearing, the stator, the fan blades and the rotor are installed on the base frame, an upwards protruding and hollow central pillar is formed in the middle of the base frame, the bearing is installed in the central pillar, a rotation shaft is matched with the bearing so that the fan blades can be arranged on the base frame, an oil return frame and an insulating annular piece are installed on the central pillar of the base frame, a first interval is formed between the central pillar of the base frame and the bearing, a second interval is formed between the bearing and the rotation shaft, the parts, making contact with the fan blades, of the oil return frame, the insulating annular piece and the rotation shaft passing through the first interval and the second interval form a plurality of circulating oil-return flowing passages in a matched and blocking mode, and grease thrown out from the fan blades flows back to the bearing through the oil-return flowing passages. The oil return structure for the cooling fan can basically recycle all the thrown-out lubricating grease through the oil-return flowing passages, enables the lubricating grease to be recycled continuously, is high in backflow efficiency of the lubricating grease, and can effectively reduce noise and frictional force for a long time.

Description

Technical field: [0001] The invention relates to the technical field of computer component products, in particular to an oil return structure for a cooling fan which has high oil return efficiency and can effectively improve the service life of the cooling fan. Background technique: [0002] With the development of the electronic industry, the development of electronic products is gradually evolving towards the direction of high performance, high frequency, high speed and light weight. With the continuous improvement of the performance of electronic products, the calculation speed is getting faster and faster, the calculation speed of the internal chipset is constantly improving, the number of chips is increasing, and the heat emitted by the chips is also increasing correspondingly. If these chips are not dissipated in time Heat will greatly affect the performance of electronic products and reduce the computing speed of electronic products. As the heat continues to accumulat...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned structure only has one oil return flow channel, and the lubricating grease is a relatively viscous liquid, so its fluidity is not good, resulting in a single oil return flow channel that cannot satisfy all the lubricating grease thrown out. Recycling, there will still be a large part that will be thrown out, that is, the grease return efficiency of the above structure is not good, and the grease thrown out will pollute the internal structure of the cooling fan, and the grease will condense after a long time, so that it hinders The operation of the entire cooling fan reduces the service life of the cooling fan

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