Method for aerodynamic noise analysis based on computer value-assisted simulation

An aerodynamic and noise analysis technology that is applied to applications, harvesters, agricultural machinery and implements, etc. It can solve problems such as difficult knife points, and achieve the effect of low cost and easy data

Inactive Publication Date: 2015-12-02
NINGBO DAYE GARDEN EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the cutting knife is a thin steel plate that has been partially bent in a slender strip, due to tolerances, shape and position tolerances, and cumulative assembly errors, it is difficult to ensure that the tip of the knife at both ends is not high or low in a circle in a large number of actual production. On the plane; in case something happens is unavoidable, but it is also necessary to ensure that there is no safety problem in Wantai

Method used

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  • Method for aerodynamic noise analysis based on computer value-assisted simulation
  • Method for aerodynamic noise analysis based on computer value-assisted simulation
  • Method for aerodynamic noise analysis based on computer value-assisted simulation

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Embodiment Construction

[0106] Lawn mowers are widely used to mow grass in the manner chosen by people. Some operators like to walk and are used to pushing the lawn mower; while some operators can choose to mow by riding. A kind of lawn mower used for mowing lawns in places such as gardens, parks and roads can be used, that is, an environment-friendly (band prosthetic foot protection and noise reduction groove) push and ride dual-purpose lawn mower. The improvement is that the front of the lawn mower is equipped with a barb tooth-intake bar; the middle of the lawn mower is equipped with artificial foot protection plates with rotating hinges; Wheels; especially the addition of a muffler tank (including a muffler pipe and a water tank); the comprehensive effect is conducive to grass feeding, counterweight, noise reduction, cooling, energy saving, environmental protection, moisture conservation and a safe lawn mower.

[0107] It turns out that when mowing grass, because the front of the lawn mower is n...

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Abstract

A method for aerodynamic noise analysis based on computer value-assisted simulation aims at using a computer to perform a 'numerical experiment', theoretically reproducing the physical process, obtaining the numerical simulation advantages of low cost, easy data acquisition and theoretical problem analysis compared with the experiment, achieving the effects of continuous calculation period shortening and more and more accurate calculation results with development of the computer and a model, using FLUENT fluid data to calculate a fluid in a rotary machine and an MRE model, considering a variable velocity field, a pressure field and turbulence energy, using LMS Virtual lab software to obtain a noise spectrum, analyzing a noise source and acquiring noise data to reduce noise. A lawn mowing machine is provided with an engine of an LPG fuel tank, and artificial-foot protection plates made of a noise elimination material are arranged on two sides of the middle of the mowing machine.

Description

technical field [0001] The present invention relates to a method for aerodynamic noise analysis aided by computer numerical simulation. The main improvement is a lawn mower which uses computer numerical simulation blade aerodynamic noise analysis. It is a lawn mowing engine with an LPG gas fuel tank. The front part of the lawn mower is equipped with a barb teeth grass feed rod; the middle part of the lawn mower is equipped with artificial foot protection plates with rotating hinges on both sides; Wheels are used; a muffler tank (including a muffler pipe and a water tank) is added; it is beneficial to grass feeding, counterweight, noise reduction, cooling, energy saving, environmental protection, moisture conservation and safety. Background technique [0002] Lawn mowers are widely used to mow grass in the manner chosen by people. When some pedestrians like and are used to using lawn mowers, they put a little more force on the rear upper armrest and have a feeling of leaning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01D43/06
Inventor 苏克叶晓波胡靖榕叶彦宁胡陈枢
Owner NINGBO DAYE GARDEN EQUIP
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