橡胶弹簧构造、功能

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Load Range载荷范围

Working compression 15 to 27.5 % - Why?压缩率15-27.5%，为什么？
Need minimum compression of 15% to insure that the machine will not bounce off of the mounting pins during start up or shut down. 最低压缩率15%以保证安 装销在启动、停机过程中不至于跳出橡胶弹簧。

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Performance Cha maintain a cylindrical shape橡 胶弹簧保持圆柱形状
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FIRESTONE INDUSTRIAL PRODUCTS COMPANY
Construction构造
Hollow Center 中空中心
Variable of Load Capacity 可提供不同的载荷能力
Affects contact area 影响接触面积 Smaller ID carries larger load 中心直径越小，载荷能力越强
Mounting Method安装方法
A pin needs to be supplied by the customer on their mounting plate to fit into the hollow center of the MarshMellow. The details are supplied on each data page of the catalog .客户需要在安装板上提供一个 销子，插入到橡胶弹簧的中心孔，详细信息请见数据样本。 Also the plate needs to be at least as large in diameter as the maximum diameter of the MarshMellow. 安装板直径不得小于橡胶弹簧的 最大直径。
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Potential damage潜在破坏
•If the pin diameter is too large it can cause tearing of the rubber core. 如果安 装销直径过大，有可能切坏橡胶芯 •If the pin diameter is too small it can allow the part to shift sideways and damage the ID 如果安装销直径过小，有可能导致橡胶弹簧水平移动，从而导致内壁损坏 •If the pin is too long it will gouge the ID of the part when compressed during lateral vibrations. 如果安装销过长，它可能啃坏橡胶弹簧内孔壁 •If the pin is too short the part can jump off during operation and damage the end of the core 如果安装销过短，运行过程中，橡胶弹簧可能跳出销子，从而导致端面损坏 •The mounting plate diameter needs to be larger than the largest diameter of the MarshMellow under full compression 安装板的直径需要大于橡胶弹簧的最大压缩时的最 大直径。
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MarshMellow Operation
橡胶弹簧应用
Performance Characteristics性能

When rubber is deformed, it flows to the path of least resistance like a fluid. 像流体一样，橡胶被压缩时会 遵循最小阻力原则。
Precautions & Advantages 注意事项以及优势
Chemical Resistance Chart化学物质耐受性
For more information you can log into the DuPont web site for a much more extensive list. 更多信息，请登 录杜邦公司网站： www.dupontelastomers.co m/tech_info/chemical.asp
Performance Characteristics特性
Linear vs. Variable Spring Rate
2800 2400 2000 Load (lb) 1600 1200 800 400 0 1 2 3 4 5 6 7 8 9 10 Displacement (in)
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FIRESTONE INDUSTRIAL PRODUCTS COMPANY
Performance Characteristics 45 tons
Height = 33 cm
Load increases by 100%
Deflection increases by 13%
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类似于空气弹簧但是不需要压缩空气
Why the name MarshMellow? 为什么叫MarshMellow
Developed by Firestone engineer, Jerry Marsh 开发者是凡士通工程师， Jerry Marsh
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It forms a sphere with flat ends.那样 会形成一个两端是平面的球形 The load is carried like a cylinder, pressure times area 载荷能力计算 类似气缸，压力乘以面积 However, the area is only the size of the contact area of the rubber and metal ends 然而，面积只是橡胶 与金属件的接触面积
MarshMellow Introduction, Construction and Function 橡胶弹簧介绍、构造以及功能
Description描述
What is a Marsh Mellow®? 橡胶弹簧是什么？

Rubber cylinder橡胶柱 Fabric reinforced纤维加固 Compression Spring压缩弹簧
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Construction构造
Fabric Construction纤维层结构
High tensile tire cord fabric 高强度轮胎纤维 Angled plies provide 层与层之间纤维成角度排列
Consistent cylindrical shape （被压缩时）保持圆柱形状 Load curve profile 载荷曲线 Stability 稳定性
Vibration Isolator隔振器
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History历史
Developed in 1973开发于1973年
Looking for a “spring” with similar characteristics to an air spring, but without requiring air 需求是：性能
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Construction构造 Solid Rubber Core Material 实心橡胶材质
Application dependent 基于应用 Vibration Isolation Compound (all catalog parts are this high efficiency compound)隔振器配方（手册中所 有产品都是这种高效的配方） High efficiency高效 Provides little damping仅提供很小的阻尼 Shock Absorption Compound冲击吸收配方 Higher damping 高阻尼 Reduces “spring back” effect降低回弹效应
Performance Characteristics特性
No Load (0 kg)零载荷 Height = 57 cm高度
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Performance Characteristics特性
22,5 tons载荷 Height = 38 cm高度
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Mounting Method安装方法
Example: W223580176
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Construction构造 End Configuration端面形状选择
Aids in installation安装指南
“Installation” p. 24 – 26 in Catalog产品样本第24-26页 Mounting pins安装销 Center rod中心杆 Cable张紧带
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Similar to an air spring与空气弹簧相似
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Construction构造
Similar concept to an Air Spring与空气弹簧理念相似
Air Spring空气弹簧
Marsh Mellow橡胶弹簧
Construction构造

Unique elements of design flexibility特殊的组成 Solid rubber core material
实心橡胶芯
Hollow center中空中心 End configuration 端面形状可选 Fabric reinforced plies 纤维增强层
No taper is the standard 标准形式是非锥面形状的。 Taper advantages 锥面形状端面的优势
Softer at low compression 低压缩时更软 Reduced stress in arc motions 弧形运动时可以降低应力 Improved fabric performance for tall, thin parts 用于又高又长的产 品时，可以提高纤维层的性能


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Performance Characteristics性能

As the height decreases in a MarshMellow, the cords pantograph, increasing diameter at the same volumetric rate. 橡胶弹簧被压 缩时，纤维平行移动，使得其直 径相应增长，但容积不变。 Internal pressure is applied over the entire volume since the contact area increases as well 由于接触面积随之增大， 内部压强会作用于整个橡胶弹 簧。