题目

压缩环的密封作用主要依靠:circled 1环的径向弹力; circled 2燃气对环的轴向压力; circled 3环内圆柱面的径向燃气压2分力; circled 4与缸壁摩擦力气流燃气流Piston rings are available in many variations. Generally each enginetops and make has to an specific ing passage. For high wor and convor and other paton-mg problems nodications are made to impose try package popcies(a)第一次密封(b)第二次密封 A. circled 1 circled 2B. circled 1 circled 2 circled 3C. circled 1 circled 2 circled 3 circled 4D. circled 1 circled 3

压缩环的密封作用主要依靠:\textcircled 1环的径向弹力; \textcircled 2燃气对环的轴向压力; \textcircled 3环内圆柱面的径向燃气压2分力; \textcircled 4与缸壁摩擦力气流燃气流Piston rings are available in many variations. Generally each enginetops and make has to an specific ing passage. For high wor and convor and other paton-mg problems nodications are made to impose try package popcies(a)第一次密封(b)第二次密封

  • A. \textcircled 1 \textcircled 2
  • B. \textcircled 1 \textcircled 2 \textcircled 3
  • C. \textcircled 1 \textcircled 2 \textcircled 3 \textcircled 4
  • D. \textcircled 1 \textcircled 3

题目解答

答案

B

解析

步骤 1：理解压缩环的密封作用
压缩环是活塞环的一种，其主要作用是密封燃烧室，防止燃气泄漏。压缩环的密封作用主要依靠环的径向弹力、燃气对环的轴向压力、环内圆柱面的径向燃气压力分力等。

步骤 2：分析选项
A. \textcircled 1 \textcircled 2：环的径向弹力和燃气对环的轴向压力。
B. \textcircled 1 \textcircled 2 \textcircled 3：环的径向弹力、燃气对环的轴向压力和环内圆柱面的径向燃气压力分力。
C. \textcircled 1 \textcircled 2 \textcircled 3 \textcircled 4：环的径向弹力、燃气对环的轴向压力、环内圆柱面的径向燃气压力分力和与缸壁摩擦力气流燃气流。
D. \textcircled 1 \textcircled 3：环的径向弹力和环内圆柱面的径向燃气压力分力。

步骤 3：选择正确答案
根据压缩环的密封作用，环的径向弹力、燃气对环的轴向压力和环内圆柱面的径向燃气压力分力都是其密封作用的主要因素。因此，正确答案是B。