Classifications

• • 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
  • 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
  • F16L55/10—Means for stopping flow from or in pipes or hoses
  • F16L55/11—Plugs
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B77/00—Component parts, details or accessories, not otherwise provided for
  • F02B77/005—Plugs

Definitions

• the invention relates to a closure element for tightly closing a bore whose closure body is provided with a defined outer diameter, so that it can be pressed into the bore.
• closure elements are used in motor housings or hydraulic and pneumatic systems, which are relatively low according to pressure, used. In the automotive industry, for example, these are used tightly in bores of motor housings. Closure elements of this type are inexpensive to produce and also easy to install and remove.
• closure element of this type is disclosed in EP PS 0 364 699 B1.
• the closure element is designed as a solid ball which can be pressed into a plug inserted into the bore.
• the solid ball works there as an organ of expansion for the plug. But it can also be pressed directly into the hole to be closed. In both cases, the ball diameter over the bore has an excess, which ensures the proper tightness of the closure.
• the solid ball is pressed directly into the hole to be closed, creates a high radial pressure on the circular pressure surface when pressed, which can damage the bore result.
• the invention has for its object to avoid this disadvantage and to provide a closure element of the type mentioned above, which causes no damage to the bore and still ensures a perfect and permanent tightness of the closure with larger bore tolerances.
• closure body of the closure element is designed as a hollow body.
• the closure element can thus easily yield during the pressing of the closure body into the bore, so that it on the wall of the Borehole exerts a reduced radial pressure, which is sufficient on the one hand for a perfect tight seal, while ensuring the integrity of the bore.
• the reduced radial pressure also allows the use of the closure element in holes with a thinner wall thickness.
• the hollow closure body also has the advantage of a lower weight, is inexpensive to produce and can be easily installed in the hole.
• the wall thickness of the hollow closure body can be selected such that the load on the bore becomes minimal.
• the cavity of the closure body according to the invention can be divided by at least one preferably centrally arranged partition wall. In this way, the hollow body regardless of its design, the necessary overall strength can be imparted without affecting the plastic deformability of the hollow body in the region of the sealing surface.
• the closure body is spherical in a first variant, in particular as a spherical hollow ball having a preferably uniform wall thickness.
• This is hers republicstechnisch and also in the installation of the closure body in the bore advantageous because the spherical ball shape no defined mounting position of the hollow sphere is necessary.
• the closure element according to the invention can also be shaped, depending on the conditions of use, with other designs deviating from the spherical shape. It may in particular be barrel-shaped and / or otherwise adapted to the cross-sectional geometry of the bore to be closed.
• closure element according to the invention can be increased by virtue of the fact that the closure body is produced in multiple layers, its outer layer preferably being softer than the inner layer. This also gives it a wider sealing surface.
• closure body is exposed in the bore during the setting process an inductive curing. As a result, it can be securely fixed in the adopted installation position and the pressure output can be increased by increasing the strength.
• the inventive closure body is primarily designed so that it can be pressed directly into the hole to be closed. But it can also be used as an expansion organ of a closure with an inserted into the bore plug.
• Figure 1 shows a closure element in section, shown before installation in the hole to be closed.
• Figure 2 shows the closure element according to the prior art in section after installation.
• FIG. 3 shows the closure element according to FIG. 2 with a device for curing the closure body during the setting process, shown schematically;
• Fig. 6 is a section of another embodiment of a closure element.
• the closure element V shown in FIG. 1 is used for sealing a bore 2 'with a closure body 3' whose diameter is dimensioned with an excess relative to the diameter of the bore to be sealed. By pressing the closure body 3 'in the bore 2' this is securely closed.
• closure elements 1 are used in housing with holes 2 and walls 4, which is, for example, motor housing of motor vehicles, hydraulic units, valve blocks or the like.
• closure element 1 in a conventional solid ball 3 'causes deformation or damage to the bore, because by the excess of a high radial pressure against the wall 4', 5 'is exercised, this also in the area of the bore where the ball is inserted.
• the closure element 1 according to the invention is distinguished by the fact that its closure body 3, which is also dimensioned with oversize, is designed as a hollow body, so that it can easily be elastically and / or plastically deformed when it is pressed into the bore 2.
• his Radiafdruck is lowered against the wall 4 of the borehole so far that it ensures a perfect and permanent tight closure of the bore without damaging the bore.
• the plastic deformation of the hollow body also results in an enlarged sealing surface.
• the shape, the wall thickness and / or the nature of the material of the closure body designed as a Hohikugel 3 are selected so that an elastic deformation takes place during its insertion into the bore 2, so that in eHarepressten state a permanent radially outward on the bore 2 acting pressure force arises.
• the outer diameter of the Verschiuss stresses 3 has over the inner diameter of the bore 2 to such an excess that a defined elastic deformation takes place when it is pressed into the bore.
• the ball diameter may be 10.1 to 10.5 mm, depending on how large the elastic deformation of the hollow ball is designed.
• this excess moves in a ratio to the bore diameter of 1% to 5%.
• This excess is distributed in each half of the ball on both sides, ie if this is 0.3 mm, then there is a difference of 0. 5 mm per side between ball and bore. Due to the resulting reduced radial pressure, it is also possible to use the closure element for closing holes with a thinner wall thickness. Another advantage also results from the reduced dead weight of the hollow closure body, a feature that is advantageous for example in automotive or aircraft.
• This closure body 3 is formed as a spherical hollow ball and has a uniform wall thickness. As a result, the production of the hollow body is simplified. Depending on the design of the bore 2, however, the hollow sphere may also deviate slightly from the exactly spherical shape, for example if the bore to be closed is to have a not exactly circular cross section.
• the closure body 3 is usually made of a metallic material, in particular steel, by welding two spherical halves together, by glazing the hollow sphere, by means of a 3D printer, a spin coating or the like.
• the closure body 3 can be treated in the bore 2 during the setting process by inductive hardening or tempering by means of a corresponding heating element 8. In this way, it remains in the assembled position preferably kept as tight over the entire life of the housing with the wall 4, as is achieved with the curing or quenching, that the stressed areas in the assembled state are stress-free.
• its interior 6 can be subdivided by at least one preferably centrally arranged separating web 7, 17, 27 or the like, as can be seen in FIGS. 4 to 6.
• this separating web 7, 17, 27 is pin-shaped and the formed interior 6 is sleeve-shaped.
• the divider is arranged concentrically to the bore axis.
• the stiffness of the hollow body can be increased in the direction of the press-in pressure, without this affecting the deformability of the hollow body transversely to the sealing surface.
• the divider 7 is dispensable if the wall thickness is sufficient only for the stiffness of the hollow body.
• FIG. 5 A corresponding variant of a closure body 13 is shown in Fig. 5, in which a barrel-shaped design is provided, in which this closure body 13 is flat on its top and bottom and the outer radius R is greater than half the diameter of the bore 2, so that after setting as shown, an annular sealing surface 15 results in order to improve the required sealing of the bore 2.
• This flat design allows easier Einpressvorgang.
• closure body 23 In a similar embodiment of a closure body 23 according to FIG. 6, this is formed with a similar outer shape as that of FIG. 5, so that reference is made to the above explanations of the closure body 13.
• the closure body can also be made in multiple layers, making it possible to adapt the material of the individual layers of their local stress. It is particularly expedient if the material for the outer layer of the hollow body is made softer than for the inner layer. As a result, the effective sealing surface of the closure element can be increased.
• Such an inner layer can be provided over the entire spherical surface or only as a ring at the point of contact with the bore.
• the hollow closure element is installed directly in the bore to be closed.
• the same advantages also arise when the hollow closure element is used as an expansion body in closures with a sealing plug embedded in the bore, as is shown, for example, in EP PS 0 364 699 B1.
• the closure body according to the invention is further distinguished by a gentle effect on the wall of the borehole to be closed.
• the wall thickness of the hollow sphere can be from approximately 1 mm to 5 mm, depending on the choice of material and the requirements.
• the inventive closure body also has the advantage that it can be used even with relatively large tolerances of the bore diameter, because he can compensate for these tolerances in particular by its elastic and conditionally plastic deformability.
• the interaction of its shape, its wall thickness and the nature of its material also makes it possible to combine these parameters. to combine from case to case so that the closure is always optimally designed for the particular conditions of use.
• the interior of the hollow body can be filled with a gas- or foam-like material or else with an activatable liquid.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Pressure Vessels And Lids Thereof (AREA)
• Dowels (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

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• 2014
  • 2014-07-18 US US15/326,518 patent/US10030802B2/en active Active
  • 2014-07-18 KR KR1020177004447A patent/KR20170033375A/ko not_active Application Discontinuation
  • 2014-07-18 RU RU2017103997A patent/RU2017103997A/ru not_active Application Discontinuation
  • 2014-07-18 EP EP14741296.9A patent/EP3169926A1/de not_active Withdrawn
  • 2014-07-18 MX MX2017000525A patent/MX2017000525A/es unknown
  • 2014-07-18 CN CN201480080675.XA patent/CN107076347B/zh active Active
  • 2014-07-18 CA CA2954304A patent/CA2954304A1/en not_active Abandoned
  • 2014-07-18 WO PCT/EP2014/065495 patent/WO2016008539A1/de active Application Filing
  • 2014-07-18 JP JP2017522718A patent/JP6538838B2/ja not_active Expired - Fee Related

Non-Patent Citations (2)

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