Power Compartment Vent Grille for Cooling and Fan Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The power compartment in engineering machinery faces a contradiction between the opening area and sound-absorbing/sound-insulating properties, particularly due to the influence of fan noise and heat dissipation, where larger air ports weaken sound-insulating effects and affect heat dissipation.
Innovation Solution
A noise-reducing unit is introduced, comprising adjustable grilles and elastic parts that adjust the opening degree of air ports based on fan rotating speed, forming a perforated plate resonance sound-absorbing structure to optimize air flow and noise reduction while maintaining sound-insulating properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the area of air ports in the power compartment hood is increased to improve heat dissipation, then the heat dissipation performance is improved, but the sound-insulating effect is weakened
Solution Approach 1:
The air port is divided into multiple segments: a first air port for heat dissipation and a second air port for noise reduction. The hood body is segmented into different functional zones with different perforation rates, allowing simultaneous optimization of heat dissipation and sound insulation
Solution Approach 2:
Different regions of the hood body are assigned different local qualities: the first air port region has higher permeability for heat dissipation, while the second air port region has lower permeability for noise reduction. The perforation rate varies locally to achieve different functional requirements in different areas
2Productivity
If the rotating speed of the fan is increased to improve cooling air volume, then the cooling performance is improved, but the noise frequency and sound pressure level are increased
Solution Approach 1:
A noise reduction component is introduced as an intermediary element between the fan noise source and the external environment. This component absorbs and attenuates noise while allowing cooling air to pass through, mediating between the conflicting requirements of high cooling performance and low noise
Solution Approach 2:
The high-velocity air flow generated by high-speed fan operation, which contributes to noise, is converted into a beneficial effect by using this air flow to drive the noise reduction component. The kinetic energy of the air flow is utilized to enhance the noise reduction function rather than being wasted
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures smooth air flow and effective noise reduction by adjusting the opening degree of air ports in sync with fan speed, enhancing both heat-dissipating and noise-reducing properties of the power compartment.
Implementation Method 1
a first elastic part pushes the first grille towards the second grille
Implementation Method 2
air out of each second air opening drives the first grille away from the second grille
Implementation Method 3
The sound-eliminating frequency is related to the perforation rate of the perforated plate and the thickness of the cavity on the back
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention relates to a power compartment and an engineering machinery with the same. The power compartment includes: a compartment; an engine, arranged in the compartment and having a cooling liquid flow path for cooling liquid to circulate; a radiator, arranged in the compartment and communicating with the cooling liquid flow path of the engine; a ventilation port, arranged on the compartment and used to introduce air for exchanging heat with the radiator or discharge the air which has exchanged heat with the radiator; and a noise-reducing unit, arranged on the ventilation port and including a first grille, a second grille and a first elastic part, wherein the first grille and the second grille are stacked along a thickness direction of a wall of the compartment, a distance between the second grille and the first grille is adjustable, the first elastic part pushes the first grille towards the second grille, the first grille includes a plurality of first air ports arranged in parallel and a first solid part located between the two adjacent first air ports, the second grille includes a plurality of second air ports arranged in parallel and a second solid part located between the two adjacent second air ports, and a projection of each second air opening in a plane vertical to a thickness direction partially or all overlaps a projection of the first solid part in the plane, so that air out of each second air opening drives the first grille away from the second grille.