• 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:
    The present invention relates to a reservoir for holding a fluid. The reservoir comprises a housing where an elastic membrane able to increase in area constitutes a wall part. The reservoir may be applied in a centralized lubrication system where grease or oil is held and over a period is forced into a system of moving parts such as a wind turbine. In particular, the invention relates to a reservoir for fluid comprising a housing (1) at least partly constituting a reservoir chamber for fluid which housing (1) is made of metal or similar rigid material and which housing comprises an inlet (2) for fluid and an outlet (3) for fluid, wherein the reservoir chamber of the housing comprises a wall part constituted of an elastic membrane (4) which elastic membrane (4) is configured so that the area of the elastic membrane (4) can and will increase when pressure inside the reservoir chamber is increased as fluid is added to the reservoir chamber.
    公开号:DK201901300A1
    申请号:DKP201901300
    申请日:2019-11-07
    公开日:2021-07-02
    发明作者:Hove Thomas
    申请人:Danhydra As；
    IPC主号:
    专利说明:

    Membrane device The present invention relates to a reservoir for holding a fluid. The reservoir comprises a housing where an elastic membrane able to increase in area constitutes a wall part. The reservoir may be applied in a centralized lubrication system where grease or oil is held and over a period is forced into a — system of moving parts such as a wind turbine.
    Background Art: Often reservoirs used for grease or other lubricants in lubrication systems comprises a cylindric reservoir chamber equipped with a piston for pushing the lubricant towards the outlet.
    EP3260754 discloses a reservoir for a lubrication system having a significant grease capacity. The grease is supplied to a reservoir chamber via a channel in a piston rod, and the reservoir or grease chamber is positioned under the piston where the chamber is filled with grease from a grease container mounted at the end of the piston rod. Hereby the grease capacity depends on the capacity of the grease container. By allowing the piston rod to project through the top of the cylinder, the amount of grease in the chamber may be detected from the position of the piston rod. A problem with the known lubrication systems are a limited grease capacity and a risk of trapping air in the grease which may cause an irregular grease supply to the individual lubrication sites. The pump of the lubrication system operates poorly when taking in air, why the pump qualities are lost short-term or long-term. As filling the lubrication system with lubricant must take place at the operational site itself, — which in the case of offshore wind turbines means expensive transportation etc., there is a need for a grease lubrication system which reduces such servicing.
    The present invention provides an improved and less expensive reservoir for a lubrication system, the reservoir according to the present invention is very easily replaced during maintenance and includes no need for replaceable parts during filling which reduce the price for service.
    Summary of invention: According to one aspect of the invention, the invention relates to a reservoir for fluid comprising a housing at least partly constituting a reservoir chamber for fluid which housing is made of metal or similar rigid material and which housing comprises an inlet for fluid and an outlet for fluid, wherein the reservoir chamber of the housing comprises a wall part constituted of an elastic membrane which elastic membrane is configured so that the area of the elastic membrane can and will increase when pressure inside the reservoir chamber is increased as fluid is added to the reservoir chamber.
    The housing may comprise one, two, three or more wall parts constituted of an elastic membrane. According to any embodiment of the invention, the area of the elastic membrane may be able to increase at least 50% compared to the area of the elastic material in relaxed or unbiased state, or e.g.
    the area of the elastic material is able to increase at least 100%, or e.g. at least 150%, or e.g. between 100% and 600%. According to any embodiment of the invention, a pump may be connected to the housing and the pump may force fluid out of the reservoir chamber through the outlet during operation.
    According to any embodiment of the invention, the elastic membrane may be constituted of a sheet of a fluid resistant e.g. an oil or a grease resistant elastomer such as a nitrile rubber. According to any embodiment of the invention, the elastic membrane may be fixed to the housing by fastening means. E.g. the fastening means may comprise a first flange or surface of the housing and a corresponding second flange or surface where the elastic membrane is positioned between the first and second flange or surface and maintained in a position relative to the housing as the two flanges or surfaces or forced together by forcing means. E.g. the forcing means are screws or bolts.
    According to any embodiment of the invention, the elastic membrane may cover a round or oval opening in the wall of the reservoir chamber/housing. According to a second aspect of the invention, the invention relates to a centralized lubrication system comprising a reservoir according to any embodiments of the first aspect.
    According to any embodiment of the second aspect of the invention, the system may be used for filling lubrication systems for wind turbines or the like. List of figures: — Figure 1A and 1B disclose respectively a side view and a top view of an embodiment of a reservoir according to the invention.
    Figure 2 discloses a cut-through view of the same embodiment as shown in figs. 1A and 1B. Throughout the application identical or similar elements of different embodiments are given the same reference numbers.
    Definitions of words: In general — when this expression is used in respect of a feature, the feature may be employed with any embodiment of the invention, even though the specific mentioning appears in the detailed part of the description.
    — Elastic membrane — Is a membrane which is able to resume its normal shape spontaneously after being stretched or compressed, i.e. such a membrane is able to exercise a pressure. This is contrary to a plastic membrane which is able to adapt to forces or to be molded into shape during a soft condition and then maintain this shape after hardening or after the forces stop affecting the membrane. A flexible membrane may be either elastic or plastic depending on the material constituting the membrane.
    Detailed description of invention: Figures 1A and 1B disclose respectively a side view and a top view of an embodiment of the reservoir according to the invention. Figure 2 discloses a cut-through-view of the same embodiment.
    The embodiment of the reservoir comprises a housing 1 made of metal or a similar rigid and robust material which housing has an inlet 2 for fluid and an outlet for fluid 3. The housing 1 comprises a wall or surface, according to fig. 1A and 2 an upper wall or surface, constituted of an elastic membrane 4, which elastic membrane is configured so that the area of the elastic membrane is able to increase or extend when pressure inside the reservoir is increased as fluid is added to the reservoir.
    The reservoir may be described as having a reservoir chamber and the walls of this reservoir chamber is constituted partly of the inner walls of the housing 1 and partly of the inner surface of the elastic membrane 4. The inlet 2 and the outlet 3 may be formed as openings through the walls of the housing 1 and the surfaces of the reservoir chamber.
    Normally, the elasticity of the membrane is dimensioned so that the pressure inside the reservoir chamber is only slightly higher than the surrounding pressure, i.e. normally the pressure inside the reservoir chamber in a filled state is up to 2 bar higher than the surrounding pressure, e.g. the pressure inside the reservoir chamber in a filled state is around 1 mbar — 1 bar, or e.g. 1-100 mbar higher than the surrounding pressure.
    The increased pressure inside the reservoir chamber supports working of a pump connected to the — reservoir chamber. Especially when a viscous fluid such as grease is kept in the reservoir chamber, it is advantageous to use the reservoir chamber according to the invention as the increased pressure which is maintained during emptying of the reservoir chamber will reduce occurrence of air bubbles and size of occurrent air bubbles in the viscous fluid.
    In relaxed or un-biased state, the elastic membrane 4 may be flat, i.e. in this case, the hemispheric shape shown in figs. 1A and 2 is only obtained when fluid is forced into the reservoir chamber through the inlet 2. However, the elastic membrane 4 may also be slightly curved in a relaxed or un-biased state.
    E.g. the fluid to be filled into the reservoir chamber may be a viscous fluid such as grease or a less viscous fluid such as oil.
    — Normally, the area of the elastic membrane may be able to increase at least 50% compared to the area of the elastic material in relaxed or unbiased state. Preferably, the area of the elastic material is able to increase at least 100%, or e.g. at least 150%, or e.g. between 100% and 600% when fluid is forced into the reservoir chamber.
    Normally, the reservoir is used in relation with a pump 5, which pump 5 will force or dose fluid from the reservoir chamber to a receiving system.
    Normally, the elastic membrane is formed as a sheet e.g. a sheet of a fluid resistant e.g. oil or grease resistant elastomer. A well-known material oil resistant elastomer is e.g. be nitrile rubber. However,
    many different known rubber-types may be used, and elastomers may even be tailor-made for adapting to different fluids.
    The elastic membrane 4 is fixed to the housing 1 by fastening means.
    The fastening means may comprise a first flange or surface 6 of the housing and a corresponding second flange or surface 7 — where the elastic membrane 4 is positioned between the first 6 and second 7 flange or surface and maintained in a position relative to the housing 1 as the two flanges or surfaces or forced together by forcing means 8 thereby pressing on each side of the elastic membrane 4. The forcing means may e.g. be screws or bolts or similar mechanical means able to hold the two flanges or surfaces together with suitable force. — The opening in the wall covered by the elastic membrane may have any shape or form.
    However, according to one embodiment the opening in wall of the reservoir chamber or housing is round or oval as this shape provides an equally distribution of tear along the edge of the elastic membrane 4. The reservoir of the present invention may be used in connection with a centralized lubrication system.
    Such centralized lubrication systems are e.g. used for filling lubrication systems for wind turbines or the like.
    Ref.no. |Reframe | Inlet for fluid Outlet for fluid 4 jeksticmembrane 6 | First flange or surface of the housing Second corresponding flange or surface 8s |focingmeorrs |
    权利要求:
    Claims (10)
    [1] 1. A reservoir for fluid comprising a housing (1) at least partly constituting a reservoir chamber for fluid which housing (1) is made of metal or similar rigid material and which housing comprises an inlet (2) for fluid and an outlet (3) for fluid, 5 characterized in that the reservoir chamber of the housing comprises a wall part constituted of an elastic membrane (4) which elastic membrane (4) is configured so that the area of the elastic membrane (4) can and will increase when pressure inside the reservoir chamber is increased as fluid is added to the reservoir chamber.
    [2] 2. Areservoir according to claim 1, wherein the area of the elastic membrane is able to increase at least 50% compared to the area of the elastic material in relaxed or unbiased state, or e.g. the area of the elastic material is able to increase at least 100%, or e.g. at least 150%, or e.g. between 100% and 600%.
    [3] —3.A reservoir according to any previous claim, wherein a pump (5) is connected to the housing (1) and the pump may force fluid out of the reservoir chamber through the outlet (3) during operation.
    [4] 4. A reservoir according to any previous claim, wherein the elastic membrane (4) is constituted of a sheet of a fluid resistant e.g. oil or grease resistant elastomer such as a nitrile rubber.
    [5] 5. A reservoir according to any previous claim, wherein the elastic membrane (4) is fixed to the housing by fastening means (6,7).
    [6] 6. A reservoir according to claim 5, wherein the fastening means comprises a first flange or surface of — the housing (6) and a corresponding second flange or surface (7) where the elastic membrane (4) is positioned between the first and second flange or surface and maintained in a position relative to the housing (1) as the two flanges or surfaces or forced together by forcing means (8).
    [7] 7. A reservoir according to claim 6, wherein the forcing means (8) are screws or bolts.
    [8] 8. A reservoir according to any previous claim, wherein the elastic membrane (4) covers a round or oval opening in the wall of the reservoir chamber/housing (1).
    [9] 9. A centralized lubrication system comprising a reservoir according to any of the claims 1-8.
    DK 2019 01300 A1 6
    [10] 10. A centralized lubrication system according to claim 9, which system is used for filling lubrication systems for wind turbines or the like.
    类似技术:
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    同族专利:
    公开号 | 公开日
    DK180693B1|2021-12-02|
    EP3819531A1|2021-05-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    AU2004254303A1|2003-07-07|2005-01-13|Natasa Enterprises Ltd.|Reusable fluid dispenser|
    DE202007016788U1|2007-11-29|2008-02-21|Lincoln Gmbh|Lubricant dispenser|
    EP2472109B1|2011-01-04|2016-06-29|Siemens Aktiengesellschaft|Repository for a lubricant|
    EP2920405B1|2012-11-16|2020-06-17|Petromac IP Limited|Sensor transportation apparatus and guide device|
    DE202015003601U1|2015-05-06|2015-07-06|Markus Landwehr|Pump unit for grease|
    EP3260754A1|2016-06-21|2017-12-27|T Hove Holding ApS|Grease lubricator|
    法律状态:
    2021-07-02| PAT| Application published|Effective date: 20210508 |
    2021-12-02| PME| Patent granted|Effective date: 20211202 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201901300A|DK180693B1|2019-11-07|2019-11-07|Membrane device|DKPA201901300A| DK180693B1|2019-11-07|2019-11-07|Membrane device|
    EP20205673.5A| EP3819531A1|2019-11-07|2020-11-04|Membrane device|
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