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V形密封圈
V形密封圈是一种唇形密封圈,主要用于往复运动,作活塞或活塞杆的密封。V形圈的唇口有“自 封”作用。其结构如图18-5-1所示。
V形圈有如下特点:
① 密封性能良好;
② 允许一定的偏心载荷和偏心运动;
③ 可以多圈重叠使用,并通过调节压紧力来获得最佳密封效果;
④ 耐冲击压力和振动压力;
⑤ 当填料不能从轴向装入时,可以开切口使用,只要安装时将切口互相错开,不影响密封效果。
V形圈密封适用于液压油、水和乳化液等介质, 使用压力可达40MPa以上,表面线速度可在0.5m/s, 使用温度可在-30~120℃范围内。如采用塑料支承环时,使用温度一般不高于100℃。在高温或在特种液压油如耐燃油中,必须使用夹织物橡胶圈;使用温度-50~140℃时,可采用棉帆布氟橡胶;若用石棉氟橡胶,使用温度可为-50~160℃,短时期内可达200℃。
单向密封橡胶圈使用条件(摘自GB/T 10708.1-2000)
| 密封圈结构形式 | 往复运动速度/(m/s) | 间隙f/mm | 工作压力范围/MPa |
|---|---|---|---|
| Y形橡胶密封圈 | 0.5 | 0.2 | 0~15 |
| Y形橡胶密封圈 | 0.5 | 0.1 | 0~20 |
| Y形橡胶密封圈 | 0.15 | 0.2 | 0~20 |
| Y形橡胶密封圈 | 0.15 | 0.1 | 0~15 |
| 蕾形橡胶密封圈 | 0.5 | 0.3 | 0~25 |
| 蕾形橡胶密封圈 | 0.5 | 0.1 | 0~45 |
| 蕾形橡胶密封圈 | 0.15 | 0.3 | 0~30 |
| 蕾形橡胶密封圈 | 0.15 | 0.1 | 0~50 |
| V形组合密封圈 | 0.5 | 0.3 | 0~20 |
| V形组合密封圈 | 0.5 | 0.1 | 0~40 |
| V形组合密封圈 | 0.15 | 0.3 | 0~25 |
| V形组合密封圈 | 0.15 | 0.1 | 0~60 |
活塞L3密封沟槽用V形组合密封圈结构型式、尺寸和公差(摘自GB/T 10708.1-2000)
注:本表的单位是mm。
| D | d | L3 | 外径 | 宽度 | 高度 | V形圈数量 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D1 | D2 | D3 | 极限偏差 | S1 | S2 | S3 | 极限偏差 | h1 | h2 | h3 | 极限偏差 | ||||
| 20 | 10 | 16 | 20.6 | 19.7 | 20.8 | ±0.22 | 5.6 | 4.7 | 5.8 | ±0.15 | 3 | 6 | 6.5 | ±0.20 | 1 |
| 25 | 15 | 16 | 25.6 | 24.7 | 25.8 | ±0.22 | 5.6 | 4.7 | 5.8 | ±0.15 | 3 | 6 | 6.5 | ±0.20 | 1 |
| 32 | 22 | 16 | 32.6 | 31.7 | 32.8 | ±0.22 | 5.6 | 4.7 | 5.8 | ±0.15 | 3 | 6 | 6.5 | ±0.20 | 1 |
| 40 | 30 | 16 | 40.6 | 39.7 | 40.8 | ±0.22 | 5.6 | 4.7 | 5.8 | ±0.15 | 3 | 6 | 6.5 | ±0.20 | 1 |
| 50 | 40 | 16 | 50.6 | 49.7 | 50.8 | ±0.22 | 5.6 | 4.7 | 5.8 | ±0.15 | 3 | 6 | 6.5 | ±0.20 | 1 |
| 56 | 46 | 16 | 56.6 | 55.7 | 56.8 | ±0.22 | 5.6 | 4.7 | 5.8 | ±0.15 | 3 | 6 | 6.5 | ±0.20 | 1 |
| 63 | 53 | 16 | 63.6 | 62.7 | 63.8 | ±0.22 | 5.6 | 4.7 | 5.8 | ±0.15 | 3 | 6 | 6.5 | ±0.20 | 1 |
| 50 | 35 | 25 | 50.7 | 49.5 | 51.1 | ±0.22 | 8.2 | 7 | 8.6 | ±0.15 | 4.5 | 7.5 | 8 | ±0.20 | 2 |
| 56 | 41 | 25 | 56.7 | 55.5 | 57.1 | ±0.22 | 8.2 | 7 | 8.6 | ±0.15 | 4.5 | 7.5 | 8 | ±0.20 | 2 |
| 63 | 48 | 25 | 63.7 | 62.5 | 64.1 | ±0.22 | 8.2 | 7 | 8.6 | ±0.15 | 4.5 | 7.5 | 8 | ±0.20 | 2 |
活塞杆L3密封沟槽结构型式及V形圈、压环、支承环尺寸和公差(摘自GB/T 10708.1-2000)
注:本表的单位是mm。
| d | D | L3 | 内径 | 宽度 | 高度 | V形圈数量 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d1 | d2 | 极限偏差 | S1 | S2 | 极限偏差 | h1 | h2 | h4 | 极限偏差 | ||||
| 6 | 14 | 14.5 | 5.5 | 6.3 | ±0.18 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 8 | 16 | 14.5 | 7.5 | 8.3 | ±0.18 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 10 | 18 | 14.5 | 9.5 | 10.3 | ±0.18 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 12 | 20 | 14.5 | 11.5 | 12.3 | ±0.18 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 14 | 22 | 14.5 | 13.5 | 14.3 | ±0.18 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 16 | 24 | 14.5 | 15.5 | 16.3 | ±0.18 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 18 | 26 | 14.5 | 17.5 | 18.3 | ±0.22 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 20 | 28 | 14.5 | 19.5 | 20.3 | ±0.22 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 22 | 30 | 14.5 | 21.5 | 22.3 | ±0.22 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 25 | 33 | 14.5 | 24.5 | 25.3 | ±0.22 | 4.5 | 3.7 | ±0.15 | 2.5 | 6 | 3 | ±0.20 | 2 |
| 10 | 20 | 16 | 9.4 | 10.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 12 | 22 | 16 | 11.4 | 12.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 14 | 24 | 16 | 13.4 | 14.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 16 | 26 | 16 | 15.4 | 16.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 18 | 28 | 16 | 17.4 | 18.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 20 | 30 | 16 | 19.4 | 20.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 22 | 32 | 16 | 21.4 | 22.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 25 | 35 | 16 | 24.4 | 25.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 28 | 38 | 16 | 27.4 | 28.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 32 | 42 | 16 | 31.4 | 32.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 36 | 46 | 16 | 35.4 | 36.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 40 | 50 | 16 | 39.4 | 40.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 45 | 55 | 16 | 44.4 | 45.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 50 | 60 | 16 | 49.4 | 50.3 | ±0.22 | 5.6 | 4.7 | ±0.15 | 3 | 6.5 | 3 | ±0.20 | 2 |
| 28 | 43 | 25 | 27.3 | 28.5 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 32 | 47 | 25 | 31.3 | 32.5 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 36 | 51 | 25 | 35.3 | 36.5 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 40 | 55 | 25 | 39.3 | 40.5 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 45 | 60 | 25 | 44.3 | 45.5 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 50 | 65 | 25 | 49.3 | 50.5 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 56 | 71 | 25 | 55.3 | 56.6 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 63 | 78 | 25 | 62.3 | 63.6 | ±0.22 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 70 | 85 | 25 | 69.3 | 70.5 | ±0.28 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 80 | 95 | 25 | 79.3 | 80.5 | ±0.28 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 90 | 105 | 25 | 89.3 | 90.5 | ±0.28 | 8.2 | 7 | ±0.15 | 4.5 | 8 | 3 | ±0.20 | 3 |
| 56 | 76 | 32 | 55.2 | 56.6 | ±0.22 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 63 | 83 | 32 | 62.2 | 63.6 | ±0.22 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 70 | 90 | 32 | 69.2 | 70.6 | ±0.28 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 80 | 100 | 32 | 79.2 | 80.6 | ±0.28 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 90 | 110 | 32 | 89.2 | 90.6 | ±0.28 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 100 | 120 | 32 | 99.2 | 100.6 | ±0.28 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 110 | 130 | 32 | 109.2 | 110.6 | ±0.28 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 125 | 145 | 32 | 124.2 | 125.6 | ±0.35 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 140 | 165 | 32 | 139.2 | 140.6 | ±0.35 | 10.8 | 9.4 | ±0.15 | 6 | 10 | 3 | ±0.20 | 3 |
| 100 | 125 | 40 | 99 | 100.6 | ±0.35 | 13.5 | 11.9 | ±0.15 | 6 | 12 | 3 | ±0.20 | 4 |
| 110 | 135 | 40 | 109 | 110.6 | ±0.35 | 13.5 | 11.9 | ±0.15 | 6 | 12 | 3 | ±0.20 | 4 |
| 125 | 150 | 40 | 124 | 125.6 | ±0.35 | 13.5 | 11.9 | ±0.15 | 6 | 12 | 3 | ±0.20 | 4 |
| 140 | 160 | 40 | 139 | 140.6 | ±0.35 | 13.5 | 11.9 | ±0.15 | 6 | 12 | 3 | ±0.20 | 4 |
| 160 | 185 | 40 | 159 | 160.6 | ±0.35 | 13.5 | 11.9 | ±0.15 | 6 | 12 | 3 | ±0.20 | 4 |
| 180 | 205 | 40 | 179 | 180.6 | ±0.45 | 13.5 | 11.9 | ±0.15 | 6 | 12 | 3 | ±0.20 | 4 |
| 200 | 225 | 40 | 199 | 200.6 | ±0.45 | 13.5 | 11.9 | ±0.15 | 6 | 12 | 3 | ±0.20 | 4 |
| 160 | 190 | 50 | 158.8 | 160.8 | ±0.35 | 16.2 | 14.2 | ±0.20 | 6.5 | 14 | 3 | ±0.25 | 5 |
| 180 | 210 | 50 | 178.8 | 180.8 | ±0.45 | 16.2 | 14.2 | ±0.20 | 6.5 | 14 | 3 | ±0.25 | 5 |
| 200 | 230 | 50 | 198.8 | 200.8 | ±0.45 | 16.2 | 14.2 | ±0.20 | 6.5 | 14 | 3 | ±0.25 | 5 |
| 220 | 250 | 50 | 218.8 | 220.8 | ±0.45 | 16.2 | 14.2 | ±0.20 | 6.5 | 14 | 3 | ±0.25 | 5 |
| 250 | 280 | 50 | 248.8 | 250.8 | ±0.45 | 16.2 | 14.2 | ±0.20 | 6.5 | 14 | 3 | ±0.25 | 5 |
| 280 | 310 | 50 | 278.8 | 280.8 | ±0.60 | 16.2 | 14.2 | ±0.20 | 6.5 | 14 | 3 | ±0.25 | 5 |
| 320 | 360 | 63 | 318.4 | 321 | ±0.60 | 21.6 | 19 | ±0.25 | 7 | 15.5 | 4 | ±0.25 | 6 |
| 360 | 400 | 63 | 358.4 | 361 | ±0.60 | 21.6 | 19 | ±0.25 | 7 | 15.5 | 4 | ±0.25 | 6 |