Air guiding hood capable of flow guiding and noise reduction

Abstract

The invention provides an air guiding hood capable of flow guiding and noise reduction. The air guiding hood capable of flow guiding and noise reduction comprises a box body. The box body comprises a top plate and a plurality of side plates. A round ventilation opening is formed in the top plate. The bottom surface enclosed by the plurality of side plates is of a square shape. The air guiding hood capable of flow guiding and noise reduction further comprises a plurality of air guiding hood plates. The sections of the ends of the air guiding hood plates are of arc shapes and the sections of the other ends of the air guiding hood plates are of straight line shapes. The plurality of air guiding hood plates are connected and formed in the box body closely by welding. The ends, of which sections are of arc shapes, of the air guiding hood plates abut on the round edge of the ventilation opening to form a standard roundness in an enclosing manner and the ends, of which sections are of straight line shapes, of the air guiding hood plates abut on the bottom surface of box body to form a standard squareness in an enclosing manner. The air guiding hood provided by the invention is in a smooth transition and streamline polyhedron structure in the direction that the air guiding hood faces a runner inwardly, so that a relatively stable flow field can be built in the air guiding hood and at the same time the air guiding hood with excellent performance can be produced without the need for developing moulds.

Description

technical field [0001] The invention relates to an air guide cover of a cooling device, in particular to an engineering machine equipped with a heat exchanger, a fan and an air guide cover with a flow guiding function between the fan and the heat exchanger. Background technique [0002] Fan noise is one of the three main noise sources on construction machinery, and the power consumption of the fan occupies the first place in the loss of engine accessories, accounting for between 5% and 12% of the effective output power of the engine. Optimizing and matching the power of the cooling system, improving the efficiency of the fan and the heat dissipation capacity of the heat exchanger, so that on the premise of meeting the heat balance requirements, reducing the fan speed as much as possible has become the main means of reducing noise and fan energy consumption; [0003] There are two main types of windshields used at this stage: stamping and tailor-welded; tailor-welded - proces...

AI Technical Summary

Problems solved by technology

When transitioning from a square heat exchanger group to an axial-flow cooling fan with left circular motion, the edges 103B at the joint are distinct and the transition is blunt. The sudden changes in these edges, corners, and sides are likely to cause backflow and aerodynamics Loss of noise and wind energy. At the same time, the backflow in the cover will also prevent the hot air (or heat radiation) from the heat exchanger from being discharged in time, resulting in a local temperature rise. At the same time, the effect of turbulence will reduce the local wind speed, resulting in heat dissipation. The uneven distribution of wind speed on the surface of the heat exchanger, these factors will lead to a decrease in the heat exchange efficiency of the heat exchanger; and the smooth transition of the edges and corners of the stamping can eliminate a series of problems caused by the vortex of the edges and corners (or edges) in the above-mentioned cover. , but in the early stage of product design, it is necessary to develop a stamping mold, which is costly, and due to the incomplete grasp of relevant parameters in the early stage of design, the air duct needs to be modified, but the mold has been formed, which will limit its further matching and modification;

[0004] The above two types of air guides can only play a certain role in guiding air, but the cooling system composed of axial fans, heat exchangers and air guides is a relatively closed space without sound absorption, and the fans are used in construction machinery. is one of the three main noise sources, the reverberation in the enclosure will be very huge

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