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环形护舷
环形浮动护舷、滚动护舷
环形护舷安装在圆形单桩、码头墙面、港口入口和转弯处，产品内部安装导轨，当环形护舷接触船只时可以跟随转动，起到引导船只前行、系泊的作用。环形护舷在金属圆筒外包裹EVA，最外层喷涂聚脲。整个产品质量轻，可以随着水面上下浮动；当船只与产品接触时，内部导轨可以减少摩擦力；而高弹发泡材料有高回弹性的特点，减少船只受到的碰撞和摩擦。环形护舷尺寸0.5m×1m至2m×4m，如需其他尺寸也可定制。
Donut fenders are designed to float up and down with the tide on a circular mono-pile either driven into the bed or mounted on the face of a quay wall. Donut fenders are suited for lock entrances, turning structures, approach channels and breasting dolphins. Not only do Donut fenders rise and fall with the tide but due to the low friction guides located inside the fender they also rotate around the pile assisting in lining up vessels for mooring or guiding though a channel.
Construction of a Donut fender is much the same as a Foam Filled Floating Fender giving them all the ideal properties for optimal, maintenance free use. As with the foam fenders any variation of size is feasible allowing the fender to be sized to fit its purpose, they are unsinkable and can be finished in a variety of colors.
内部直径
Pile Diameter （m）
外部直径Outer Diameter of Fender
（m）
垂直长度Vertical contact face height
(m)
低吸能反力
高吸能反力
能量吸收Energy Absorption
(KNm)
反作用力
Reaction Force
(kN)
能量吸收Energy Absorption
(KNm)
反作用力
Reaction Force
(kN)
0.5
1
3
14.7
224.6
24.5
374.7
0.6
1.2
2
13.7
179.5
23.5
300.2
0.6
1.2
3
21.5
269.6
34.3
450.2
0.9
1.8
1
15.7
135.3
26.4
224.6
0.9
1.8
2
32.3
269.7
51.9
450.2
0.9
1.8
3
48
405.1
78.4
674.9
1.25
2.5
2
61.8
374.7
100.1
624.8
1.25
2.5
3
92.2
562.1
151
937.8
1.25
2.5
4
123.6
750.4
201.1
1249.7
1.5
3
2
89.2
450.2
144.2
750.4
1.5
3
3
133.4
674.9
200.6
1125.2
1.5
3
4
177.5
899.7
289.4
1509.7
2
4
2
157.9
600.3
257
999.6
2
4
3
236.4
899.5
385.5
1499.9
2
4
4
315.8
1199.7
514.1
2000.3