CN105658963A - 储压器 - Google Patents

储压器 Download PDF

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CN105658963A
CN105658963A CN201480057559.6A CN201480057559A CN105658963A CN 105658963 A CN105658963 A CN 105658963A CN 201480057559 A CN201480057559 A CN 201480057559A CN 105658963 A CN105658963 A CN 105658963A
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foundation structure
pressure reservoir
dipping
film
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CN105658963B (zh
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P·克劳福特
H·巴特斯
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Hydac Technology GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/02—Diaphragms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3155—Accumulator separating means having flexible separating means characterised by the material of the flexible separating means

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  • Mechanical Engineering (AREA)
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Abstract

本发明涉及储压器，所述储压器具有在介质空间(6、8)之间形成可移动的分离元件的膜(4)，所述膜(4)由具有不同材料的相继的层(16、18、20、22、24、26)构成，其特征在于，在由弹性体组成的层(18)之间设置至少一个具有长丝并且设置有气密性浸渍层(24)的基础结构(16、20)的层。

Description

储压器
本发明涉及储压器，所述储压器具有在介质空间之间形成可移动的分离元件的膜，所述膜由具有不同材料的相继的层构成。
这种储压器(所谓的膜式储存器)属于现有技术。在液压系统中，这种储压器可以被用作减震器或脉冲消除器，用以抑制工作回路中的压力冲击。其还可以用作无泵应急回路中的能量源并且也适合例如作为液压压力弹簧等。
使用这种储压器和工作气体(例如空气或优选氮气)的缺点在于，膜取决于弹性体的化学组成和透过环绕气体的操作时间。氮气或空气首先溶解在弹性体中并且通过蒸发扩散至环境。通过这种方式减少在储存系统中存在的气体量并且功能优越性迅速降低，由此储存系统不可使用也不可再利用，而且必须丢弃。
为了提高高弹性气密性塑料膜的渗透阻力，现有技术中已知的是设置多层膜结构，其中通过刮涂、喷涂、浇注或刷涂施加经交联聚硅氧烷层，参见DE4231927C2。
在另一个根据现有技术的解决方案中(参见DE4405009A1)，为多层膜单元设置第一和第二塑料膜，第一塑料膜由弹性体组成而第二塑料膜为聚酯膜。
从现有技术出发，本发明的目的是提供储压器，所述储压器的膜的特征在于进一步改进的并且在长的操作时间内稳定的渗透阻力。
根据本发明，通过具有权利要求1以其整体的特征的储压器实现所述目的。因此本发明的特征在于，多层膜单元具有至少一个具有长丝并且设置有气密性浸渍层的基础结构的层，所述层设置在由弹性体组成的层之间。使用具有长丝的结构作为多层膜单元的组件避免了为了提高气密性而施加在载体上的层脱落或剥落的危险。由于挤压移动的原因，所述危险存在于现有技术中，膜在操作中经受所述挤压移动并且所述挤压移动在操作过程中可能造成裂缝形成，因此造成脱落或剥落。
与此不同，在通过渗入浸渍层并且包围基础结构上的长丝使根据本发明设置有气密性浸渍层并具有长丝的基础结构，实现紧密的不可脱落的结合和不变的高渗透阻力。
特别有利的是，基础结构可以由由塑料形成的织物、编织物、针织物或无纺布形成，其中优选设置由聚酰胺(PA6.6)形成的塑料织物。
在一个有利的实施方案中，膜可以相继具有丁腈橡胶(NBR)层、经浸渍基础结构、另一个丁腈橡胶(NBR)层、第二个经浸渍基础结构和第三个丁腈橡胶(NBR)层。在设置两个作为组件的膜单元的组件的气密性经浸渍基础结构中实现特别高的透过系数。
特别有利的是在各个基础结构的两侧上设置聚乙酸乙烯酯(PVAc)层用于形成浸渍层。
还特别有利的是在各个经浸渍基础结构和丁腈橡胶(NBR)层之间设置乙烯-乙烯醇-共聚物(EVOH)阻挡层。
在一个特别有利的实施方案中，膜相继具有包含粘合胶层的丁腈橡胶(NBR)阻挡层、乙烯-乙烯醇-共聚物(EVOH)层、浸渍的聚乙酸乙烯酯(PVAc)层、基础结构、浸渍的聚乙酸乙烯酯(PVAc)层、乙烯-乙烯醇-共聚物(EVOH)阻挡层、粘合胶层、乙烯-乙烯醇-共聚物(EVOH)阻挡层、浸渍的聚乙酸乙烯酯(PVAc)层、第二个基础结构、浸渍的聚乙酸乙烯酯(PVAc)层、乙烯-乙烯醇-共聚物(EVOH)阻挡层以及丁腈橡胶(NBR)层上的粘合胶层。
下文通过附图详细解释本发明。
附图显示：
图1显示了根据本发明的储压器的实施例的示意性纵截面；
图1a显示了图1中标出的实施例的膜的局部区域的大幅放大并且不成比例的示意图，和
图2显示了根据图1a的示意图的经修改实施例的膜的局部区域。
图1显示了根据本发明的储压器，所述储压器具有以焊接构造形成的储存壳2，在所述储存壳2中，作为可移动的分离元件的多层结构的膜4分离流体侧6和气体侧8。所述储存壳2通过填充接口10用工作气体(例如氮气)填充。在流体侧6存在流体接口12，所述流体接口12连接至(未示出的)液压系统。在膜4的中间区域中在其面对流体接口12的侧面上存在气门14，在流体侧6完全排空并且膜4被相应拉出时，所述气门14关闭流体接口12。图1显示了在完全清空的无压储存器中所处状态下的膜4。图1a显示了膜4的实施例的层结构的示意图。在所示实施例中，在两个由弹性体18(例如NBR)形成的层之间存在具有长丝的气密性经渗透基础结构16。为了对基础结构16进行气密性渗透，在其两侧上施加聚乙酸乙烯酯涂层。所述基础层在图1a中不可见。基础结构16本身由聚酰胺PA6.6塑料织物形成。图1a的实施例的膜4具有第二个气密性经浸渍基础结构20，所述基础结构20与第一个基础结构16相同地位于由弹性体18形成的层之间。与第一个基础结构16相同，第二个基础结构20也由聚乙酸乙烯酯PA6.6塑料织物形成，其中同样在两侧上设置聚乙酸乙烯酯基础浸渍层。在实际实施方案中，由所述层形成的膜4具有0.6mm的总厚度。
在图2的实施例中，膜4除了在第一个实施例中设置的层之外，在第一和第二基础结构16和20的经浸渍基础层的每一侧上还分别具有乙烯-乙烯醇-共聚物EVOH阻挡层22，所述阻挡层22位于在图2中可见的第一和第二基础结构16、20两侧上的经浸渍基础层24上。在两个弹性体外层18和最接近的阻挡层22之间存在粘合胶层26，在第一和第二基础结构16、20的相邻的阻挡层22之间也存在粘合胶层26。
如在描述的第一个实施例中一样，在图2的具有更多数目的层的实施例中，膜4也以0.6mm的总厚度形成。例如，位于外部的弹性体层18和粘合胶层26的厚度分别为0.15mm。包括基础层24和阻挡层22的第一和第二基础结构16、20的厚度可以分别为0.13mm，并且粘合胶层26可以具有0.04mm的平均层厚度。通过设置在第一和第二基础结构16、20两侧的两对额外的乙烯-乙烯醇-共聚物EVOH阻挡层22，实现膜4的最高气密性。
气密性渗透层24原位引入基础结构，并且在该区域中可以完全省去特别是粘合剂层形式的其它常见的粘合层和结合层。在基础结构中引入浸渍层在增强方面在一定程度上支撑织物层。

Claims (9)

1.储压器，所述储压器具有膜(4)，所述膜(4)在介质空间(6、8)之间形成可移动的分离元件并且由具有不同材料的相继的层(16、18、20、22、24、26)构成，其特征在于，在由弹性体组成的层(18)之间设置至少一个具有长丝并且设置有气密性浸渍层(24)的基础结构(16、20)的层。
2.根据权利要求1所述的储压器，其特征在于，每个具有长丝的基础结构(16、20)具有织物、编织物、针织物或无纺布。
3.根据权利要求1或2所述的储压器，其特征在于，设置多于一个具有长丝、经浸渍基础结构(16、20)的层。
4.根据前述权利要求任一项所述的储压器，其特征在于，在基础结构(16、20)之间设置至少一个另外的层，所述另外的层的至少一者由弹性体(18、26)组成。
5.根据前述权利要求任一项所述的储压器，其特征在于，经浸渍基础结构(16、20)具有优选由聚酰胺(PA6.6)构成的塑料织物。
6.根据前述权利要求任一项所述的储压器，其特征在于，膜(4)相继具有丁腈橡胶(NBR)层(18)、经浸渍基础结构(16)、另一个丁腈橡胶(NBR)层(18)、第二个经浸渍基础结构(20)和第三个丁腈橡胶(NBR)层(18)。
7.根据前述权利要求任一项所述的储压器，其特征在于，在各个基础结构(16、20)的两侧上设置聚乙酸乙烯酯(PVAc)层(24)用于形成浸渍层。
8.根据前述权利要求任一项所述的储压器，其特征在于，在各个经浸渍基础结构(16、20)和丁腈橡胶(NBR)层(18、26)之间设置乙烯-乙烯醇-共聚物(EVOH)阻挡层(22)。
9.根据前述权利要求任一项所述的储压器，其特征在于，膜(4)相继具有包括粘合胶层(26)的丁腈橡胶(NBR)层(18)、乙烯-乙烯醇-共聚物(EVOH)阻挡层(22)、浸渍的聚乙酸乙烯酯(PVAc)层(24)、基础结构(16)、浸渍的聚乙酸乙烯酯(PVAc)层(24)、乙烯-乙烯醇-共聚物(EVOH)阻挡层(22)、粘合胶层(26)、乙烯-乙烯醇-共聚物(EVOH)阻挡层(22)、浸渍的聚乙酸乙烯酯(PVAc)层(24)、第二个基础结构(20)、浸渍的聚乙酸乙烯酯(PVAc)层(24)、乙烯-乙烯醇-共聚物(EVOH)阻挡层(22)以及丁腈橡胶(NBR)层(18)上的粘合胶层(26)。
CN201480057559.6A 2014-01-09 2014-11-14 储压器 Active CN105658963B (zh)

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PCT/EP2014/003054 WO2015104034A1 (de) 2014-01-09 2014-11-14 Druckspeicher

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US10145390B2 (en) 2018-12-04

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