Piston and Rings - Three Ring Piston
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| 图 1 | g01038789 |
(1) 安装顶环时必须使黄色条朝向活塞环开口间隙右侧。 安装顶环时必须使 "UP-1" 朝上。 活塞环开口间隙必须与相邻活塞环开口间隙隔 120 ± 20 度。
(2) 安装第二道活塞环时必须使绿色条朝向活塞环开口间隙右侧。 安装中间环时必须使 "UP-2" 朝上。 活塞环开口间隙必须与相邻活塞环开口间隙隔 120 ± 20 度。
(3) 安装油控环和油环弹簧时，必须使它们的开口间隔相隔 180 度。 油环弹簧的白色部位必须可以通过油控环间隙看见。 活塞环开口间隙必须与相邻活塞环开口间隙隔 120 ± 20 度。
注: 表 1 中的值是新活塞环的技术规范。
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| 活塞和活塞环 | ||||
| 项目 | (1) 顶环 | (2) 第二道环 | (3) 油控环 | |
| 新活塞环上槽宽 | 6.185 ± 0.015 mm (0.2435 ± 0.0006 in) |
6.185 ± 0.015 mm (0.2435 ± 0.0006 in) |
8.050 ± 0.010 mm (0.3169 ± 0.0004 in) |
|
| 活塞环的宽度 | 5.9825 ± 0.0075 mm (0.2355 ± 0.0003 in) |
5.9825 ± 0.0075 mm (0.2355 ± 0.0003 in) |
7.925 ± 0.011 mm (0.3120 ± 0.0004 in) |
|
| 环槽和活塞环之间的间隙 | 0.2025 ± 0.0225 mm (0.0080 ± 0.0009 in) |
0.2025 ± 0.0225 mm (0.0080 ± 0.0009 in) |
0.125 ± 0.021 mm (0.0049 ± 0.0008 in) |
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| 活塞环开口间隙 (1) |
1.15 ± 0.15 mm (0.0453 ± 0.0059 in) |
1.95 ± 0.15 mm (0.0768 ± 0.0059 in) |
1.10 ± 0.20 mm (0.043 ± 0.008 in) |
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| ( 1 ) | 给出的值适用于安装在 280 mm (11.024 in) 孔中的环。 |
活塞销孔径 ... 120.028 ± 0.008 mm (4.7255 ± 0.0003 in)
活塞销直径 ... 119.994 ± 0.006 mm (4.7242 ± 0.0002 in)
活塞销和活塞孔的冷态间隙 ... 0.034 ± 0.014 mm (0.0013 ± 0.0006 in)
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