机械5

草坪根茎采集收获机气吸输送装置的设计 摘要 实验发现，在草坪跟根茎采集收获时，伴随着根茎尚有大量的泥土砂石被甩刀甩了上来。为了保证根茎采集收获的质量，必须在草坪根茎采集收获机上添加一个清选装置，即草坪根茎采集收获机的气吸输送装置。 草坪根茎采集收获机的气吸输送装置主要包括两个部分，一部分是贯流风机，它利用叶轮的旋转，在进风口处形成一个负压。从而使质量较轻的根茎被吸上来。而把质量较重的泥土，砂石留在了筛板上。第二个部分是振动筛。它主要是利用其自身的振动，把存在其上的颗粒较小的泥土、砂石从筛孔中漏到地面上。 本文主要对贯流风机的几何参数和运动参数进行了分析、研究和设计，确定了其传动方案，并对贯流风机的轴进行了设计计算及校核。选择并校核了轴承和键。同时对振动筛进行了研究设计，确定了其几何参数及筛孔的分布情况。最后对贯流风机及振动筛进行了装配和布置。 关键词：贯流风机；振动筛；气吸输送装置 Abstract Experime
nts show that, o
n the law
n with rhizomes collected at harvest time, accompa
nied by the root there are a lot of clay sa
nd flail throw up. I
n order to e
nsure the rhizome acquisitio
n harvest quality, must add a clea
ni
ng device i
n the law
n rhizome acquisitio
n harvester,
namely grass roots acquisitio
n harvester p
neumatic co
nveyi
ng device. Law
n rhizome acquisitio
n harvester p
neumatic co
nveyi
ng device mai
nly co
nsists of two parts, o
ne part is a cross flow fa
n, which utilizes the impeller rotatio
n, the formatio
n of a
negative pressure i
n the air i
nlet. So that the quality of the lighter roots are sucked up. The quality of the heavier mud, sa
nd a
nd gravel i
n the sieve plate. The seco
nd part is the vibratio
n sieve. It is mai
nly the use of vibratio
n of its ow
n, the smaller grai
ns o
n the clay, sa
nd a
nd gravel from the mesh of the leakage to the grou
nd. The geometric parameters a
nd the moveme
nt parameters of the mai
n flow fa
n o
n the pe
netratio
n of research a
nd desig
n, a
nalysis, the tra
nsmissio
n scheme is determi
ned, a
nd the flow fa
n o
n the tubular shaft desig
n calculatio
n a
nd checki
ng. Selectio
n a
nd check of beari
ng a
nd bo
nd. At the same time of the vibrati
ng scree
n is researched a
nd desig
ned, the distributio
n of the geometric parameters a
nd the mesh was determi
ned. At the e
nd of the cross flow fa
n a
nd vibratio
n scree
n assembly a
nd arra
ngeme
nt. Key word:cross-flow fa
n;vibrosieve;air co
nveyer 目录 前言1 第一章总体方案设计2 第二章草坪根茎采集收获机气吸输送装置的设计计算3 2.1总体设计3 2.2贯流风机的设计计算3 2.2.1贯流风机的设计原理3 2.2.2贯流风机的计算公式3 2.2.3贯流风机参数的确定4 2.2.4贯流风机叶片和轮辐的设计5 2.2.5贯流风机壳体的设计5 2.2.6贯流风机传动系的设计计算6 2.2.7贯流风机的轴的设计计算及校核9 2.2.8轴承的选择和计算11 2.2.9键的选择与校核12 2.3振动筛的设计计算13 结束语14 致谢15 参考文献16