A high-pressure cooling fan for high-flow and low-noise fuel cell vehicles

Abstract

The invention relates to a high-pressure cooling fan for a high-flow low-noise fuel cell vehicle, which includes a hub, fan blades, an outer ring and a wind protection ring, the hub and the outer ring are coaxially arranged, and the fan blades are fixed between the hub and the outer ring and rotate The axis is centered and distributed at equal intervals in the circumferential direction. The wind protection ring is arranged outside the outer ring. The fan blades include a plurality of two-dimensional blades. The two-dimensional blades are inclined at a certain blade installation angle. The two-dimensional blades The three-dimensional blade shape is projected onto the corresponding circumferential cylindrical section. The three-dimensional blade shape from the root to the tip of the fan blade is superimposed on the inner side of the outer ring along the set leading edge stacking line. The installation of each two-dimensional blade shape The relationship between the angle and the normalized radius of the cylindrical section of the two-dimensional airfoil is a polynomial function, and the normalized radius is the ratio of the radius of the cylindrical section of the three-dimensional airfoil to the radius of the cylindrical section at the blade tip of the fan blade. Compared with the prior art, the fan of the invention improves gas flow and effectively suppresses turbulent noise, and has low-noise and high-flow characteristics at high rotational speed.

Description

technical field [0001] The invention relates to an automobile cooling fan, in particular to a high-pressure cooling fan for a high-flow low-noise fuel cell automobile. Background technique [0002] In recent years, there has been more and more research on thermal management in the automotive industry. Among them, the cooling fan is a very important component in the car cooling system. Its efficiency and performance are one of the important indicators for the performance evaluation of the entire car cooling system. Choosing a suitable cooling fan is very important for the cooling system and air conditioning system. In fuel cell vehicles, fuel cell stacks, air compressors, drive motors and controllers will generate a lot of heat during operation. Since the maximum operating temperature of the fuel cell stack is required to be about 20°C lower than that of a traditional engine, the temperature difference between gas and liquid at the cooling water is much lower than that of a ...

AI Technical Summary

Problems solved by technology

The noise value increases with the flow and pressure of the fan. High flow usually means high noise. These two indicators affect each other, and it is difficult to achieve a balance. Blindly increasing the fan speed to increase the air volume of the fan will inevitably cause noise. Therefore, it is necessary to develop a large-flow and low-noise cooling fan structure for high-speed operating conditions in fuel cell vehicles

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