• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1051057A1
    申请号:SE1051057
    申请日:2010-10-11
    公开日:2012-04-12
    发明作者:Magnus Bergman；Tommy Andersson
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    10152025302difficult and time-consuming to predict / calculate which lines will be exposedfor vibrations that can cause fatigue failure.
    DESCRIPTION OF THE INVENTIONAn object of the present invention is to provide a simple and reliablevibration dampers of an initially stated type which may be for preventive purposesarranged on pipelines which may be exposed to harmful vibrations.
    This is achieved by the features set forth in the appended claims.
    According to a consideration of the invention, the vibration damper has a mass comprisinga kinetic energy absorbing housing and a connection for joining the housing to aoutside of the pipeline to set the mass in motion through the pipeline and therebyby absorbing vibration-inducing kinetic energy of the pipeline. Therebycan be achieved that the mass is set in motion relative to the pipeline by the pipeline and performsa damping work, so that the pipeline is at least partially prevented from vibratingby absorbing at least some of the energy associated with vibratingparticularly vibrational resonant vibrations.
    In particular, the mass may be arranged to absorb the kinetic energy by damping.work involving internal friction in the mass and / or friction between the mass andthe pipeline. In addition, the mass has the advantage that it changes the total masstogether with the pipeline and that this in turn leads to harmful intrinsiccan be transferred to frequencies to which the pipeline is not exposed.
    Although within the scope of the invention the pulp could comprise a rigid casingwhich contains e.g. a damping fluid, the housing is flexible in one embodiment of the inventionningen. It can then be easily formed around the pipeline and to follow its thirtymental extent. It can then also be so flexible that it is completely or partially setin motion of the vibrations to perform the damping work.10152025303The cover can also be elastic. It can then be biased to better follow the pipelineoutside. The elasticity can also contribute to the damping work by providingreciprocating frictional movements in the housing and between the housing and the pipeline.
    The casing can be bent or wrapped around the pipeline. It can then be mounted afterwards onan already installed pipeline.
    The housing can also be tubular. It may then have occurred on the pipeline before itinstalled.
    Such a tubular housing may also be radially expandable by axial contact.pressure. If it is then also elastic, it can easily be moved to different desired placesalong the conduit by being compressed wholly or in sections in the longitudinal direction,moved and finally released at the new location. Connection of the housing to thethe reaction can in this case be achieved with the inherent elasticity and then be consideredbe an elastic shrink joint, which may but may not need anyseparate connectors.
    The casing can furthermore be composed of metal wires. The metal wires can then betied as a fabric in the form of a sock or cuff of loosely tiedfabric, braid, mesh or the like to provide a large number of friction contact pointswhere the threads can rub against each other to contribute to the damping work whensan is set in motion by the pipeline. The housing may also consist of two or moreother connected concentric layers of interwoven metal wires where the inner layeris responsible for the connection and the outer layer / s is responsible for the energy absorption. A so-such a casing can be made by turning a metal sock in half inside out.
    The connection may also comprise a plurality of connecting means along the mass. Before-connecting means at opposite ends of the mass, one or more connecting means maygan be arranged in different positions along the mass. The positions can be determined bycalculations or attempts to tune the damper to achieve optimal vibrationattenuation of the pipeline under varying operating conditions.10152025304A connector for the housing may comprise a strap or clamp enclosing itmass. Bands can in turn be any known type of cable ties made of metal or plastic.
    A clamp may comprise any known type of pipe clamp.
    Other connecting means for the casing may, where appropriate, include glue, solder orwelded joints.
    An advantage of the invention is that the several advantageous embodiments relativelycan be applied to already existing pipelines in the event that it is found that an existingpipeline from the beginning has not been designed in an optimal way. The invention can thereforewith constitute a suitable service solution for pipelines that prove to have problemswith vibrations. As a result, largely standardized pipelines can be usedand only those pipelines which have problems with vibration need to beaccording to the invention. This brings obvious benefits with cost savingswhich is of great importance for mass-produced products such as vehicles and engines.
    Other features and advantages of the invention may be set forth in the claims anddescription of embodiments.
    BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a plan view with broken away parts of a pipeline with a pair of vibratingdampers according to the invention;FIG. 2 is a side view of a pipeline with a vibration damper which may be elastic.politically connected with the management;FIG. 3A and 3B are side views of a cut piece of pipeline with an expandablevibration dampers, before resp. after connection to the pipeline;FIG. 4 is a side view of a cut piece of pipeline with a vibration damper forbound by a clamp connection at the pipeline; andFIG. 5 is a view corresponding to FIG. 4 with a vibration damper connected by aadhesive, solder or welded joints at the pipeline; andFIG. 6 is a perspective view of a cut piece of pipeline with an approximate conduita wound vibration damper according to the invention.10152025305In the drawing, the same reference numerals are used throughout for parts with equal or similarfunction.
    DETAILED DESCRIPTION OF EMBODIMENTSIn the illustrative representation of FIG. 1, a pipeline 30 is fixed at its ends.bonded to a pair of components 40 and 42 which may be, for example, a vehicletor and an additive. In this example, the pipeline is designed by onesubstantially rigid matter, for example a metallic material, but can in other applicationsbe made of another material, such as plastic or other non-rigid material. Duringoperation, the line 30 can vibrate in an undesired manner by vibrations from the component40, 42 are transmitted to line 30 from either of the fixed connections 32,36. The line 30 can also vibrate undesirably by transporting a pulseflow induced by velocity or pressure variations. To prevent suchUnwanted or harmful vibrations can, as mentioned above, line 30 on the knownways are connected e.g. through one or more pipe clamps 34 at some solid object 44,for example in the engine compartment not shown in more detail.
    According to the invention, however, in addition or exclusively one or more vibrators are used.ration attenuator 10 to prevent the undesired vibrations of such a pipeline30. In the embodiment shown in FIG. 1 comprises the two vibration dampers 10 eacha mass in the form of a casing 12 of a flexible material which at least in sectionscloses and is limited movably connected to the conduit 30 to absorb the movementenergy of the line 30, so that it is prevented from vibrating - e.g. with its resonantfrequency - in a way that can cause fatigue failure. Each flexible housing 12 is inthis case clamped by straps or clamps 20, such as cable ties, hose clampsor other suitable connecting means in suitable places along the pipeline 30. Thussuch suitable places can be determined by experiments or calculations with the aim ofminimize the unwanted vibrations.
    As indicated in the smaller enlarged area in FIG. 1, the housing may be in the form of asock or cuff of woven or braided metal wires 14 of e.g. rust-free steel. As further indicated, In the larger enlarged area in FIG. 1, the contact point10152025306ter P (only one is shown) between the wires 14 be limited movable, so that the wires 14slides with friction against each other in the large number of contact points P, when thegi is transferred from the pipeline 30 to the housing 12, and thus contributes to the damping work.
    Damping work is also performed when the housing 12 simultaneously slides with friction against the pipethe outside of the ning.
    In FIG. 2 shows an example of a pipeline 30 with a vibration damper 10 in shapeof an elastic casing 12 of metal wires 14. The casing 12 may then be connected to tubularthe conduit 30 by inherent elasticity. As indicated in the enlarged area inFIG. 2, the housing 12 may have double layers of wires 14, 14 ”. The inner layer can then do moreresponsible for the connection to the pipeline 30, while the outer layer is more responsible forthe limited mobility. As mentioned, the double layers can also provideby partially inverting (not shown) the housing 12.
    In FIG. 3A and 3B show the possibility of designing the housing 12 so that it can expand the frame.partially when compressed axially. The housing 12 can then be more easily threaded on and moved alonga finished pipeline 30, and optionally also allowed to be threaded over fasteners, such asfastening nuts 32, 36 (FIG. 2) of the pipeline 30. Especially in the case where the invention is usedas a service solution for an existing pipeline, it is an essential advantage tobe able to easily mount the cover 12.
    FIG. 4 again shows the possibility of clamping the housing 12 with a band clamp or ring20, while FIG. 5 generally shows an adhesive, solder or welded joint 20. As can be seen inIn these cases the casing 12 has a slightly larger inner diameter than the outer diameter of the pipeline 30.to enable the housing 12 to perform radial damping movements, when necessaryvändigt.
    In FIG. 6 finally shows the possibility of using a flexible casing 12 in the form of a bandor sheets that can be bent or wound, e.g. helical, around the pipeline 30 andanchored in suitable places by means of e.g. hose clamps 20 (only one is shown inFIG. 6). Such a bent or wrapped casing does not necessarily have to completely enclosethe management, but can e.g. for material-saving purposes be screw-wound with a largewithout overlap (not shown) if this is sufficient for the desired damping function in itindividual case.7The above detailed description of a pipeline in a vehicle is primarily intended tofacilitate understanding and any limitations of the claims should not be construedfrom there. Those skilled in the art will appreciate upon reviewing the description that the invention maycarried out without deviation from the inventive concept in many other applications toexamples where there is an internal combustion engine or other component such as onepump or a compressor. The invention can thus be applied generally to all types ofper of pipelines.
    权利要求:
    Claims (16)
    [1]
    A vibration damper (10) for a pipeline (30), characterized by a mass comprising a kinetic energy absorbing housing (12); and a connection (20) connecting the housing to an outside of the pipeline (30) to set the mass in motion through the pipeline and thereby absorb vibration-inducing kinetic energy of the pipeline
    [2]
    Vibration dampers according to claim 1, wherein the mass (12) is arranged to absorb the kinetic energy by damping work comprising internal friction in the housing (12) and / or friction between the housing (12) and the pipeline (30).
    [3]
    Vibration damper according to one of the preceding claims, wherein the housing (12) is flexible.
    [4]
    Vibration damper according to one of the preceding claims, wherein the housing (12) is elastic.
    [5]
    A vibration damper according to any one of the preceding claims, wherein the housing (12) is bent or wound around the pipeline (30).
    [6]
    A vibration damper according to any one of claims 1-4, wherein the housing (12) is tubular.
    [7]
    Vibration damper claim 6, wherein the connection comprises an elastic shrinkage band inherent in the housing (12).
    [8]
    Vibration damper according to claim 6 or 7, wherein the housing (12) is radially expandable by axial compression.
    [9]
    Vibration damper according to one of the preceding claims, wherein the housing (12) is composed of metal wires (14, 14 ').
    [10]
    Vibration dampers according to claim 9, wherein the metal wires (14, 14 ') are composed such as fabric, braid or mesh. 9
    [11]
    A vibration damper according to any one of the preceding claims, wherein the connection comprises a plurality of connecting means (20) along the housing (12).
    [12]
    A vibration damper according to claim 11, wherein said connecting means comprises a band or clamp (20) enclosing the mass (12).
    [13]
    A vibration damper according to claim 11, wherein said connecting means comprises an adhesive joint (20).
    [14]
    A vibration damper according to claim 11, wherein said connecting means comprises a solder joint (20).
    [15]
    A vibration damper according to claim 11, wherein said connecting means comprises a welded joint (20).
    [16]
    Pipeline (30), provided with a vibration damper (10) according to any one of the preceding claims, preferably intended for an engine or a vehicle.
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    同族专利:
    公开号 | 公开日
    SE535300C2|2012-06-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1051057A|SE535300C2|2010-10-11|2010-10-11|Vibration damper for a pipeline and piping provided with such a vibration damper|SE1051057A| SE535300C2|2010-10-11|2010-10-11|Vibration damper for a pipeline and piping provided with such a vibration damper|
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