CN112112844A - 具有带金属化阻挡膜的隔膜或囊胆的蓄压器 - Google Patents

具有带金属化阻挡膜的隔膜或囊胆的蓄压器 Download PDF

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CN112112844A
CN112112844A CN202010547511.0A CN202010547511A CN112112844A CN 112112844 A CN112112844 A CN 112112844A CN 202010547511 A CN202010547511 A CN 202010547511A CN 112112844 A CN112112844 A CN 112112844A
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thermoplastic film
bladder
metal
film
membrane
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J·沃克尔
P·J·霍格斯桑格
N·塔克尔曼
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Freudenberg NOK GP
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    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04—Devices damping pulsations or vibrations in fluids
    • F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
    • F16L55/05—Buffers therefor
    • F16L55/052—Pneumatic reservoirs
    • F16L55/053—Pneumatic reservoirs the gas in the reservoir being separated from the fluid in the pipe
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    • B32B1/00—Layered products having a non-planar shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
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    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
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    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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    • C23C14/20—Metallic material, boron or silicon on organic substrates
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Abstract

用于蓄压器的隔膜和囊胆，各自包括形成为圆顶形状或球根形状的热塑性膜。金属气相沉积层设置在所述热塑性材料的至少一侧上。内橡胶层和外橡胶层粘附在所述金属涂覆的膜的相反侧上，使得所述金属化热塑性膜提供阻挡膜以有效地减慢诸如氮气的气体穿过所述隔膜或囊胆的渗透。

Description

具有带金属化阻挡膜的隔膜或囊胆的蓄压器
技术领域
本公开涉及一种具有带金属化阻挡膜的隔膜或囊胆的蓄压器。
背景技术
这部分提供与本公开相关的背景信息，所述背景信息并不一定是现有技术。
蓄压器通常在液压系统中用作压力储库，其中不可压缩的液压流体由外部源保持在压力下。外部源可以是弹簧、升高的重量或压缩气体。当使用压缩气体作为弹簧源时，通常在压缩气体与液压流体之间使用隔膜或囊胆。使用压缩气体的问题在于：气体可能渗透穿过隔膜或囊胆，并且需要定期再充填气体。
发明内容
这部分提供本公开的总体概述，并且不是对本公开的全部范围或其所有特征的全面公开。
用于蓄压器的隔膜包括形成为圆顶形状的热塑性膜。金属气相沉积层设置在所述圆顶形热塑性膜的至少一侧上以形成金属涂覆的圆顶形膜。内橡胶层和外橡胶层粘附在所述金属涂覆的圆顶形膜的相反侧上。所述金属化热塑性膜提供阻挡膜以有效地减慢诸如氮气的气体穿过所述隔膜的渗透。
根据另一方面，用于蓄压器的囊胆包括形成为球根形状的热塑性膜。金属气相沉积层设置在所述球根形热塑性膜的至少一侧上以形成金属涂覆的预定形状的膜。所述膜的形状可以是圆顶形的或被成形为与其他囊胆或隔膜相对应。内橡胶层和外橡胶层粘附在所述金属涂覆的预定形状的膜的相反侧上。所述金属化热塑性膜提供阻挡膜以有效地减慢诸如氮气的气体穿过所述囊胆的渗透。
另外的应用领域将通过本文提供的描述变得显而易见。在这个概述中的描述和具体实例仅仅意图用于说明目的，而并不意图限制本公开的范围。
附图说明
本文描述的附图仅仅是为了说明所选实施方案而不是所有可能实现方式，并且并不意图限制本公开的范围。
图1是根据本公开的原理的示例性隔膜蓄压器的剖视图；
图2A是根据本公开的原理的隔膜的剖视图；
图2B是根据本公开的原理的图2A的指示部分的放大视图；
图3是根据本公开的原理的示例性囊胆蓄压器的剖视图；
图4A是根据本公开的原理的囊胆的剖视图；并且
图4B是根据本公开的原理的图4A的指示部分的放大视图。
贯穿附图的若干视图，对应的附图标号指示对应的部分。
具体实施方式
现在将参考附图更全面地描述示例性实施方案。
提供示例实施方案以使得本公开将是完整的，并且将向本领域的技术人员充分传达范围。阐述了许多特定细节，诸如特定部件、装置和方法的实例，以提供对本公开的实施方案的透彻理解。对于本领域技术人员将显而易见的是具体细节不需要进行采用，示例性实施方案可按许多不同的形式来实施，并且不应当将两者理解为对本公开的范围的限制。在一些示例性实施方案中，并未详细描述众所周知的过程、众所周知的装置结构和众所周知的技术。
本文所使用的术语仅用于描述特定示例性实施方案的目的，并且并不意图进行限制。如本文所使用，单数形式“一个(a,an)”和“所述(the)”可意图同样包括复数形式，除非上下文明确地以其他方式指示。术语“包括(comprises,comprsing,including)”和“具有(having)”是包括性的且因此指明所陈述特征、整体、步骤、操作、元件和/或部件的存在，但并不排除一个或多个其他特征、整体、步骤、操作、元件、部件和/或其群组的存在或添加。本文描述的方法步骤、过程和操作不应当理解为必定需要以所讨论或所示的特定次序执行，除非具体地标识为执行次序。还应当理解，可采用另外的或替代的步骤。
当一个元件或层被称为“在另一个元件或层上”、“接合至”、“连接至”、或“耦接至”另一个元件或层时，它可直接在另一个元件或层上、接合至、连接至或耦接至另一个元件或层，或者可存在中间元件或中间层。相反，当一个元件被称为“直接在另一个元件或层上”、“直接接合至”、“直接连接至”或“直接耦接至”另一个元件或层时，可不存在中间元件或中间层。用来描述元件之间的关系的其他词应当以类似方式解释(例如，“在……之间”与“直接在……之间”，“相邻”与“直接相邻”等等)。如本文所使用，术语“和/或”包括相关联的所列项目中的一个或多个的任何和所有组合。
参考图1，示出了隔膜式蓄压器10，其包括壳体12，所述壳体12在第一端部处具有充气阀14并且在第二端部处具有流体端口16。圆顶形隔膜18设置在壳体12内，并且包括由夹紧圈36密封地附接到壳体12的外周边缘20。通常通过充气阀14引入诸如氮气的加压气体以对隔膜18的内表面施加压力。液压流体系统22连接到蓄压器10的流体端口16。
参考图2，隔膜18包括形成为圆顶形状的热塑性膜24。更特别地，热塑性膜可由聚三氟氯乙烯(PCTFE)、FEP、CTFE(商业名称ACLAR)、ECTFE(商业名称HALAR)、PVF(商业名称TEDLAR)、具有聚酰胺的含EvOH层压材料、具有聚酯的氟碳膜层压材料或其他热塑性材料形成。金属气相沉积层26设置在圆顶形热塑性膜24的至少一侧上以形成金属涂覆的圆顶形膜。金属气相沉积层26可施加到圆顶形热塑性膜24的内表面和外表面。内橡胶层28和外橡胶层30粘附在金属涂覆的圆顶形膜24的相反侧上。内橡胶层和外橡胶层可包含例如硅橡胶、氟碳橡胶或氢化丁腈橡胶(HNBR)。粘合剂层32可用于将内橡胶层28和外橡胶层30粘附到金属涂覆的圆顶形膜24。粘合剂层32可包含基于硅烷或环氧树脂的粘合剂，尽管可使用其他类型的粘合剂。内橡胶层28和外橡胶层30可预成型或直接模制到可预涂覆有粘合剂32的金属涂覆的圆顶形膜24。内橡胶层28和/或外橡胶层30可设置有环形沟槽或肋38，所述环形沟槽或肋38为隔膜18提供挠曲区域。
热塑性膜24的厚度可在4密耳与8密耳之间，并且更特别地为约6密耳。金属气相沉积层26可包含铝或另一种金属，并且其厚度可在1500与5000埃之间。内橡胶层28和外橡胶层30可具有厚度在1mm与5mm之间并且更特别地为约2mm的平均厚度。内橡胶层28和外橡胶层30可包括内和外密封珠或特征34，其有助于将隔膜18密封在夹紧圈36与壳体12的内表面之间。内橡胶层28和外橡胶层30可包含聚氨酯、HNBR、硅橡胶、氟碳橡胶和ECO橡胶。
金属化热塑性膜24/26提供阻挡膜以有效减慢诸如氮气的气体穿过隔膜18的渗透。
参考图3，示出了囊胆式蓄压器110，其包括壳体112，所述壳体112在第一端部处具有充气阀114并且在第二端部处具有流体端口116。囊胆118设置在壳体112内，并且包括密封地附接到壳体112的外周边缘120。通常通过充气阀114引入诸如氮气的加压气体以在囊胆118的内部施加压力。液压流体系统22连接到蓄压器110的流体端口116。
参考图4，囊胆118包括形成为球根形状的热塑性膜124。更特别地，热塑性膜124可由聚三氟氯乙烯(PCTFE)或其他热塑性材料形成。球根形状可由多个零部件形成，这多个零部件包括可由粘合剂128粘附到彼此的两个圆顶形部分126a、126B。应当理解的是，球根形膜124可以其他方式形成。金属气相沉积层130设置在球根形膜124的至少一侧上。金属气相沉积层130可施加到球根形热塑性膜124的内表面和外表面。一对橡胶层134、136粘附在金属涂覆的球根形膜124的相反侧上。粘合剂层132可提供用于将橡胶层134、136粘附到金属涂覆的球根形膜124，并且可包含基于硅烷或环氧树脂的粘合剂132。内橡胶层134和外橡胶层136可预成型或直接模制到可预涂覆有粘合剂132的金属涂覆的球根形膜124。
热塑性膜124的厚度可在4密耳与8密耳之间，并且更特别地为约6密耳。金属气相沉积层130可包含铝或另一种金属，并且其厚度可在1500与5000埃之间。内橡胶层134和外橡胶层136的厚度可在1mm与10mm之间，并且更特别地为约3mm。
金属化热塑性膜124/130提供阻挡膜以有效减慢诸如氮气的气体穿过囊胆118的渗透。
已出于说明和描述目的提供实施方案的以上描述。不意图是穷举的或限制本公开。特定实施方案的单独元件或特征通常不限于那个特定实施方案，而是在适当情况下为可互换的并且可用于所选实施方案中，即使没有具体示出或描述。特定实施方案的单独元件或特征也可以多种方式变化。这些变化不应当视为脱离本公开，并且所有这些修改都意图包括在本公开的范围内。

Claims (20)

1.一种用于蓄压器的隔膜，其包括：
热塑性膜，所述热塑性膜形成为限定形状；
金属层，所述金属层设置在所述热塑性膜的至少一侧上以形成金属涂覆的膜；以及
内橡胶层和外橡胶层，所述内橡胶层和所述外橡胶层粘附在所述金属涂覆的膜的相反侧上。
2.根据权利要求1所述的隔膜，其中所述热塑性膜由聚三氟氯乙烯、FEP、CTFE、ECTFE、PVF、具有聚酰胺的含EvOH层压材料和具有聚酯的氟碳膜层压材料中的一种制成。
3.根据权利要求1所述的隔膜，其中所述内橡胶层和所述外橡胶层由粘合剂粘附到所述金属涂覆的膜。
4.根据权利要求1所述的隔膜，其中所述热塑性膜具有在4密耳与8密耳之间的厚度。
5.根据权利要求4所述的隔膜，其中设置在所述圆顶形热塑性膜上的所述金属层具有在1500与5000埃之间的厚度。
6.根据权利要求4所述的隔膜，其中所述金属层设置在所述热塑性膜的两侧上。
7.根据权利要求4所述的隔膜，其中所述金属层由铝制成。
8.根据权利要求1所述的隔膜，其中所述内橡胶层和外橡胶层中的每一者由聚氨酯、HNBR、硅橡胶、氟碳橡胶和ECO橡胶中的一种制成。
9.一种形成蓄压器的隔膜的方法，其包括：
将热塑性膜形成为限定形状；
在所述热塑性膜的至少一侧上气相沉积金属层以形成金属涂覆的热塑性膜；以及
将内橡胶层和外橡胶层粘附在所述金属涂覆的热塑性膜的相反侧上。
10.根据权利要求9所述的方法，其中所述热塑性膜由聚三氟氯乙烯、FEP、CTFE、ECTFE、PVF、具有聚酰胺的含EvOH层压材料和具有聚酯的氟碳膜层压材料中的一种制成，并且所述金属层由铝制成。
11.根据权利要求10所述的方法，其中所述热塑性膜具有在4密耳与8密耳之间的厚度。
12.根据权利要求11所述的方法，其中设置在所述热塑性膜上的所述金属层具有在1500与5000埃之间的厚度。
13.一种用于蓄压器的囊胆，其包括：
热塑性膜，所述热塑性膜形成为球根形状；
金属层，所述金属层设置在所述球根形热塑性膜的至少一侧上以形成金属涂覆的球根形膜；以及
内橡胶层和外橡胶层，所述内橡胶层和所述外橡胶层粘附在所述金属涂覆的球根形热塑性膜的相反侧上。
14.根据权利要求13所述的囊胆，其中所述热塑性膜由聚三氟氯乙烯、FEP、CTFE、ECTFE、PVF、具有聚酰胺的含EvOH层压材料和具有聚酯的氟碳膜层压材料中的一种制成。
15.根据权利要求13所述的囊胆，其中所述内橡胶层和所述外橡胶层由粘合剂粘附到所述金属涂覆的球根形膜。
16.根据权利要求13所述的囊胆，其中所述热塑性膜具有在4密耳与8密耳之间的厚度。
17.根据权利要求16所述的囊胆，其中设置在所述圆顶形热塑性膜上的所述金属层具有在1500与5000埃之间的厚度。
18.根据权利要求16所述的囊胆，其中所述金属层设置在所述热塑性膜的两侧上。
19.根据权利要求16所述的囊胆，其中所述金属层由铝制成。
20.根据权利要求13所述的囊胆，其中所述内橡胶层和所述外橡胶层由聚氨酯、HNBR、硅橡胶、氟碳橡胶和ECO橡胶中的一种制成。
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