橡胶弹簧构造以及功能简介

1、橡胶弹簧构造以及功能简介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Vibration Isolator隔振器Description描述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：性能类似于空气弹簧但是不需要压缩空气Why the name MarshM

2、ellow? 为什么叫MarshMellowDeveloped by Firestone engineer, Jerry Marsh 开发者是凡士通工程师， Jerry Marsh History历史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Construction构造Review SampleApplication dependent 基于应用Vibrat

3、ion 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Solid Rubber Core Material 实心橡胶材质Construction构造Variable of Load Capaci

4、ty 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Construction构造Hollow Center 中空中心Mounting Method安装方法A pin needs to be supplied by the customer on their mountin

5、g 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。Mounting Method安装方法Examp

6、le: W223580176No 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 Construction构造End Configuration端面形状选择High tensile tire cord fabric 高强度轮胎纤维Angle

7、d 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Similar to an air spring与空气弹簧相似Fabric Construction纤维层结构Construction构造Air Spring空气弹簧Marsh Mellow橡胶弹簧Similar concept to an Air Spring与空气弹簧理念相似Construction构造MarshMellow Operation橡胶弹簧应用When rubber is

8、 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。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

9、是橡胶与金属件的接触面积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

10、橡胶弹簧。Performance Characteristics性能Marsh Mellows maintain a cylindrical shape橡胶弹簧保持圆柱形状Performance Characteristics特性No Load(0 kg)零载荷Height = 57 cm高度Performance Characteristics特性22,5 tons载荷Height = 38 cm高度Performance Characteristics特性45 tonsHeight = 33 cmLoad increases by 100%Deflection increases by 1

11、3%Performance CharacteristicsPerformance Characteristics特性Precautions & Advantages注意事项以及优势Chemical Resistance Chart化学物质耐受性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 si

12、deways 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

13、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。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 d

14、uring 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。Also, minimum of 15% in order to get into a better isolation range due to natural frequency15%的最低压缩率还保证了较好的隔振率Maximum of 27.5% in order to keep rubber temperature under control in normal working conditions最高压缩率27.5%确保正常运行过程中橡胶弹簧的温度不至于超高Ma

15、ximum 40% deflection Why?最大变形40%Although you should not operate the part dynamically at above 27.5% deflection, it can take impact loads up to 40%虽然不应使橡胶弹簧的动态压缩率超过27.5%，但是橡胶弹簧可以承受40%压缩率的冲击。Above 40% compression the rubber can fracture and the fabric plys fail超过40%的压缩率时，橡胶可能会破裂，纤维层可能会失效。Load Range载荷范

16、围Lateral Static Deflection横向位移Although MM can move laterally on a dynamic basis, you should keep them vertical statically as close as you can. 即使橡胶弹簧可以在动态情况下允许横向移动，但在静态情况下应尽可能得保证其垂直。Vertical/Lateral dynamic motion垂直方向运动Most vibrating equipment moves in three dimensions with two dimensions being domi

17、nant. (see the oval pattern at right). 多数振动设备有3个方向的振动但是以2个方向为主（见右图）Stroke/Deflection行程/变形Equipment stroke设备行程Advantages vs. Coil and Rubber Springs与螺旋弹簧及橡胶块对比的优势Compared to a steel spring:对比钢质弹簧Corrosion resistance 耐腐蚀寿命长Quieter安静Improved overload condition 改善超载运行状态Improved failure mode 优化的失效模式 零载荷高

18、度低,易于安装有冲击时高度变化小Better lateral isolation 更好的横向隔振性能Compared to a solid rubber mount: 对比于橡胶块弹簧寿命长Better isolation隔振效果好Larger load capacity/diameter载荷能力大Better lateral stability横向稳定性好Improved failure mode优化的失效模式Why does this matter to you?其他特性Mobile Vibrating Screen移动振动筛 Most Vibrating Screen applications are used outdoors and often in damp, dirty environments多数振动筛用于户外，且常见环境比较潮湿、脏乱。 Variable spring rate means that you can maintai