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u= 1—γ/E·(r_1~2P_1-r_2~2p_2/r_2~2-r_1~2)r+(1+γ)/E·(P_1-P_2)r_1~2 r_2~2/r_2~2-r_1~2·1/r 式中:γ——圆筒材料的泊桑比 E——圆筒材料的弹性模量预应力的大小由预紧压力确定,而预紧压力又取决于配合公盈值。如图2所示。设内外圈之间的过盈量为△d,在半径上则为△r=△d/2。压合后,内圈在p_2的作用下缩小△r”,外圈半径在p_2的作用下增大△r’,根据变形协调关系可得:
u = 1-γ / E · (r_1 ~ 2P_1-r_2 ~ 2p_2 / r_2 ~ 2-r_1 ~ 2) r + (1 + γ) / E · (P_1 -P_2) r_1 ~ 2 r_2 ~ 2 / r_2 ~ 2- r_1 ~ 2 · 1 / r Where: γ - Poisson’s ratio of cylinder material E - elastic modulus of cylinder material The magnitude of prestress is determined by preload pressure, which in turn depends on the ratio value. as shown in picture 2. Set the amount of interference between the inner and outer ring for the △ d, the radius is △ r = △ d / 2. After press-fitting, the inner ring will reduce Δr "under the effect of p_2, and the outer ring radius will increase Δr ’under the action of p_2. According to the deformation coordination relationship,