CN112279040A - 具有包括含氟聚合物的护套的电梯承载部件 - Google Patents

具有包括含氟聚合物的护套的电梯承载部件 Download PDF

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CN112279040A
CN112279040A CN201911393751.3A CN201911393751A CN112279040A CN 112279040 A CN112279040 A CN 112279040A CN 201911393751 A CN201911393751 A CN 201911393751A CN 112279040 A CN112279040 A CN 112279040A
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fluoropolymer
load bearing
bearing member
jacket
elevator load
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赵谦
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Otis Elevator Co
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    • B66—HOISTING; LIFTING; HAULING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
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Abstract

电梯承载部件的说明性示例实施例包括多个承载缆索以及至少部分地包绕缆索的护套。护套包括容纳在缆索上的内部部分以及建立护套的耐火外部的含氟聚合物外部部分。

Description

具有包括含氟聚合物的护套的电梯承载部件
技术领域
已知多种电梯系统。一些电梯系统使用液压布置来用于移动电梯轿厢。其它的基于牵引，且包括悬挂电梯轿厢和对重的绳。机器引起牵引轮的移动，其继而引起绳的移动，以用于如期望的那样移动电梯轿厢。
背景技术
多年来，电梯系统中的绳包括圆形钢绳。新近，开发了平带技术，其提供优于传统圆形钢绳布置的优点。即使有进步，本领域技术人员努力改进电梯承载部件技术。
发明内容
电梯承载部件的说明性示例实施例包括多个承载缆索以及至少部分地包绕缆索的护套。护套包括容纳在缆索上的内部部分以及建立护套的耐火外部的含氟聚合物外部部分。
在具有先前段落的电梯承载部件的一个或多个特征的示例实施例中，含氟聚合物部分完全包围内部部分。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，含氟聚合物部分包括功能性含氟聚合物。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，含氟聚合物部分包括四氟乙烯-乙烯共聚物。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，含氟聚合物部分包括全氟烷氧基烷烃。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，含氟聚合物部分包括全氟化乙烯基醚和四氟乙烯的共聚物。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，功能性含氟聚合物包括官能团，该官能团包括酸酐、硅烷、缩水甘油和异氰酸酯中的至少一种。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，内部部分的材料量与含氟聚合物的量的比率在1:2至1:40的范围中。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，比率在1:5至1:20的范围中。
在具有先前段落中任一个的电梯承载部件的一个或多个特征的示例实施例中，比率为1:8或1:15。
制作电梯承载部件的方法的说明性示例实施例包括在多个承载缆索上形成护套的内部部分，以及在内部部分上建立耐火的含氟聚合物部分以限定护套的外部。
在具有先前段落的方法的一个或多个特征的示例实施例中，形成和建立通过共挤出(coextrude)内部部分的材料和含氟聚合物部分的含氟聚合物来执行。
具有先前段落中任一个的方法的一个或多个特征的示例实施例包括分别形成内部部分和至少一层含氟聚合物材料，以及层压该至少一层和所形成的内部部分。
根据以下详细描述，至少一个公开的示例实施例的各种特征和优点对本领域技术人员将变得显而易见。附随详细描述的图可简要描述如下。
附图说明
图1示意性地示出包括根据该发明的实施例设计的承载部件的电梯系统的选定部分。
图2示意性地示出电梯承载部件的示例实施例。
图3示意性地示出用于制作像图2中所示出的电梯承载部件的工艺的选定特征。
图4示意性地示出用于制作像图2中所示出的电梯承载部件的工艺的另一示例实施例。
具体实施方式
图1示意性地示出电梯系统20的选定部分。电梯轿厢22和对重24由承载部件26悬挂。与机器(未特别示出)相关联的牵引轮28选择性地控制承载部件26的移动，以控制电梯轿厢22的移动或位置。为了说明的目的，在图1中表示单个承载部件26。在许多实施例中将包括多个承载部件。
图2示意性地示出示例承载部件26，该示例承载部件26包括至少部分地由护套32包绕的多个承载缆索30。缆索30可包括对支承电梯系统20的负载有用的多种材料。在一些实施例中，缆索30包括钢且各自包括多个线。其它实施例包括例如由铝、碳纤维或液晶聚合物制成的缆索30。
护套32包括内部部分或层34，其被容纳抵靠缆索30。内部部分34包括可压缩材料，该可压缩材料提供与缆索30的良好粘附来提供足够的拔出强度，以保持承载部件26在其使用寿命内的期望构造。示例实施例包括内部部分34，该内部部分34包括聚氨酯、聚酰胺、聚酯或乙烯丙烯二烯单体橡胶(EPDM)中的至少一种。
护套32还包括含氟聚合物部分或层36，其建立护套32的耐火外部。在示出的实施例中，含氟聚合物部分36包绕第一部分34且建立护套32的整个外部。含氟聚合物部分36在暴露于火或其它高温条件时是自熄的且抗点燃、熔化或滴落(drip)。包括含氟聚合物部分36给予承载部件26耐火特性，同时在护套32上建立外部表面，提供用于控制电梯轿厢22的移动和位置的必要牵引。
含氟聚合物部分36在至少一些实施例中还改进护套32的磨损特性，这可延长承载部件26的使用寿命。例如，相比于聚氨酯，含氟聚合物具有优良的硬度、断裂应力和在断裂时的拉伸伸长特性，故相比于先前使用的护套材料，包括外部含氟聚合物部分36的护套具有优良的磨损特性。而且，相比于聚氨酯与阻燃剂的共混物，含氟聚合物部分36为此类护套提供更好的机械性能特性。
在示例实施例中，含氟聚合物包括四氟乙烯-乙烯共聚物。另一示例实施例包括全氟烷氧基烷烃，诸如四氟乙烯和全氟化乙烯基醚的共聚物，其已官能化以在聚合物主链内包括粘合(adhesive)基团。此类材料在暴露于火焰时不熔化或滴落，且给予护套32优良的耐火特性，包括保持承载部件26的几何形状的能力。
在一些实施例中，含氟聚合物材料包括功能性含氟聚合物，该功能性含氟聚合物包括官能团，诸如酸酐、硅烷、缩水甘油、异氰酸酯、羧酸、胺和酰胺。
图3示意性地示出制作示例承载部件26的示例方法。含氟聚合物部分36的含氟聚合物材料40的树脂连同内部部分34的材料44的树脂(其在示出的示例实施例中为聚氨酯)馈送到共挤出器42中。缆索30从缆索供应部46馈送到模具48中。共挤出器42在模具48的第一或内部区段中将内部部分34共挤出到缆索30上，且在模具48的第二或外部区段中将含氟聚合物部分36共挤出到内部部分34上。在共挤出中使用的材料的粘附特性足以将含氟聚合物部分36固定到内部部分34，而在它们之间不需要额外的粘合层。
图4中示出另一示例方法。在该实施例中，内部部分34的材料44的树脂馈送到挤出器50中，挤出器50在模具52内将内部部分34挤出到缆索30上。所得到的结构54包括包围在聚氨酯材料中的缆索30。含氟聚合物的预形成层56抵靠结构54定位，且在60处层压在一起。例如，如图2中示出的，所得到的承载部件26包括包绕内部部分34的含氟聚合物部分36。
护套32可包括内部部分34和含氟聚合物部分36的各种量的相应材料。护套32中内部部分34材料的量与含氟聚合物部分36材料的量的比率在1:2至1:40的范围中。示例实施例包括那些材料在1:5至1:20的范围中的比率。一个示例实施例具有1:8或1:15的优选比率。
根据该发明的实施例设计的承载部件可具有与上文描述和说明中的承载部件的平带样式不同的构造。例如，承载部件可具有圆形截面。
包括含氟聚合物部分作为护套的外部提供抑烟和耐火特性，其包括避免护套32的滴落或熔化。相比于试图将耐火材料并入带有聚氨酯或其它护套材料的共混物中的电梯承载部件护套组合物，含氟聚合物提供此类保护连同优良的机械性能。
前述描述本质上是示例性的，而不是限制性的。对所公开的示例的变型和修改对本领域技术人员可变得显而易见，其不必脱离该发明的本质。给予该发明的法律保护的范围仅可通过研究以下权利要求书来确定。

Claims (13)

1.一种电梯承载部件，包括：
多个承载缆索；以及
护套，所述护套至少部分地包绕所述缆索，所述护套包括被容纳抵靠所述缆索的内部部分以及建立所述护套的耐火外部的含氟聚合物部分。
2.根据权利要求1所述的电梯承载部件，其特征在于，所述含氟聚合物部分完全包围所述内部部分。
3.根据权利要求1所述的电梯承载部件，其特征在于，所述含氟聚合物部分包括功能性含氟聚合物。
4.根据权利要求3所述的电梯承载部件，其特征在于，所述含氟聚合物部分包括四氟乙烯-乙烯共聚物。
5.根据权利要求3所述的电梯承载部件，其特征在于，所述含氟聚合物部分包括全氟烷氧基烷烃。
6.根据权利要求5所述的电梯承载部件，其特征在于，所述含氟聚合物部分包括四氟乙烯和全氟化乙烯基醚的共聚物。
7.根据权利要求3所述的电梯承载部件，其特征在于，所述功能性含氟聚合物包括官能团，所述官能团包括酸酐、硅烷、缩水甘油和异氰酸酯中的至少一种。
8.根据权利要求1所述的电梯承载部件，其特征在于，所述内部部分的材料量与含氟聚合物的量的比率在1:2至1:40的范围中。
9.根据权利要求8所述的电梯承载部件，其特征在于，所述比率在1:5至1:20的范围中。
10.根据权利要求8所述的电梯承载部件，其特征在于，所述比率为1:8或1:15。
11.一种制作电梯承载部件的方法，所述方法包括：
在多个承载缆索上形成护套的内部部分；以及
在所述内部部分上建立耐火的含氟聚合物部分以限定所述护套的外部。
12.根据权利要求11所述的方法，其特征在于，所述形成和所述建立通过共挤出所述含氟聚合物部分的含氟聚合物和所述内部部分的材料来执行。
13.根据权利要求11所述的方法，其特征在于，所述方法包括
分别形成所述内部部分和至少一层含氟聚合物材料；以及
层压所述至少一层和所形成的内部部分。
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