PFE-31016
PFEDT
PFEDU
PFEDU 20
PFEDT
PFEDT
PFEDU
PFEDW
PFE-31028
PFEDT
PFEDT 20
PFEDU
PFEDV
PFEDV 20导阀要求有良好的密封性，而且导阀流量增益太大对稳定性不利，故一般导阀半锥角α2取为20°．
8、导阀座孔径d，d1
导阀座孔直径d大，导阀芯工作稳定性好，则导阀弹簧力加大，结构尺寸增大，一般取d=(2～5)d0；另外，d1对导阀动态特性影响较大，为使阻尼也起正常作用，设计中保证d>d1
9、主阀弹簧的予压量h1
10、主阀弹簧刚度Ky
11、导阀弹簧予压量x10和刚度Kx
可根据导阀欲开未开时导阀芯受力关系导出。
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