Oil-free scroll vacuum pump

Abstract

The invention relates to an oil-free scroll vacuum pump which comprises a fan blade (1), a fan blade cover (2), an end cover (3), a rotating shaft (4) and an annular flow guide cover (8). Multiple convex ribs (5) are circumferentially arranged on the end cover (3), a ventilation groove (6) is formed between every two adjacent convex ribs (5), one end of the rotating shaft (4) is connected with the fan blade (1), the fan blade cover (2) covers the fan blade (1), the fan blade cover (2) is provided with multiple first air holes (7), the annular flow guide cover (8) is located in the fan blade cover (2), the lower end of the annular flow guide cover (8) presses the convex ribs (5), the upper end of the annular flow guide cover (8) abuts against the inner wall of the fan blade cover (2), the multiple first air holes (7) are located on the inner side of the annular flow guide cover (8), the outer side of the ventilation groove (6) communicates with external air, and the inner side of the ventilation grove (6) communicates with an inner cavity of the fan blade cover (2) through a hole in the middle of the annular flow guide cover (8). The oil-free scroll vacuum pump has the advantage of being good in heat dissipation effect.

Description

technical field [0001] The invention relates to a pump, in particular to an oil-free scroll vacuum pump. Background technique [0002] The oil-free scroll vacuum pump will generate a lot of heat during operation, which will cause the temperature of the pump body to rise sharply. Therefore, a cooling device is required to cool the pump body and dissipate heat. At present, oil-free scroll vacuum pumps on the market are equipped with heat dissipation devices, which generally include fan blades and fan blade covers. The rotating shaft of the oil-free scroll vacuum pump is connected outside the end cover, and the fan blade cover is covered outside the fan blade and fixed on the heat dissipation rib. Although the oil-free scroll vacuum pump of the above structure has a simple structure, it cannot form a reasonable cooling air duct, resulting in the unsmooth circulation of the high-speed airflow generated by the rotation of the fan blades, especially in the middle area of ​​the ou...

AI Technical Summary

Problems solved by technology

Although the oil-free scroll vacuum pump with the above-mentioned structure has a simple structure, it cannot form a reasonable cooling air passage, which leads to the unsmooth circulation of the high-speed airflow generated by the rotation of the fan blades, especially in the middle area of ​​the outer surface of the end cover. The air circulation is the worst, so that the heat here cannot be transferred out in time, which greatly affects the heat dissipation effect of the oil-free scroll vacuum pump, and in severe cases, the oil-free scroll vacuum pump will be stuck

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