Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
  • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
  • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
  • B60H1/00557—Details of ducts or cables
  • B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants
• • 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
  • F16L55/02—Energy absorbers; Noise absorbers
  • F16L55/033—Noise absorbers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
  • B60H2001/006—Noise reduction

Definitions

• the present invention relates to an enclosure for the passage of a pressurized fluid of the type comprising a first half-shell formed by a cylindrical wall, provided on one side with a bottom formed in one piece with said wall, and having on the other side, an opening closed by a closure piece made integral with the first half-shell.
• Such silencers are therefore generally made of steel, which then allows soldering after insertion of the part in the half-shell.
• the present invention aims to provide an enclosure which responds better than those previously known to the requirements of practice, in particular in that it uses materials such as aluminum alloys, which are significantly lighter, in that it makes it possible to reduce the thickness of the walls of the enclosure while respecting the same standards of resistance to pressure, and in that it results in easier and less expensive manufacture of said enclosures.
• the invention notably proposes an enclosure for the passage of a pressurized fluid comprising a first half-shell formed of a cylindrical wall, provided on one side with a bottom formed in one piece with said wall, and having on the other side an opening closed by a closure piece made integral with the first half-shell, characterized in that the closure piece is a second half-shell formed in one piece by a bottom and a cylindrical wall introduced frictionally into the first half-shell to which it is fixed by gluing, the first half-shell being crimped on the periphery of the bottom of the second half-shell.
• the first and second half-shells are made of aluminum alloy
• the internal diameter of the cylindrical wall of the first half-shell has a narrowing at the end portion of the wall of the second half-shell with which it cooperates in force;
• the bottom of at least one half-shell comprises at least one cylindrical orifice provided with a tube for the passage of the fluid in the enclosure, said tube being fixed to said bottom by stamping the tube on either side of the bottom; the tube is also fixed by gluing in the hole in the bottom;
• the orifice comprises an internal shoulder opening out on the side of the enclosure;
• Each bottom comprises a cylindrical orifice provided with a passage tube, the orifices being eccentric relative to the axis of the cylindrical walls;
• the enclosure further comprises at least one O-ring in sealing elastomer between the cylindrical walls of the two half-shells.
• the invention also provides a method of manufacturing an enclosure as described above and in particular a method of manufacturing an enclosure for the passage of a pressurized fluid made of aluminum alloy, characterized in that. two tubes are fixed, respectively by gluing and stamping of said tubes on either side of the bottoms of two half-shells, in two holes drilled in said bottoms, eccentrically with respect to the axis of said half-shells, it is coated at least in part of polymerizable adhesive on the internal or external surface of at least one of the two half-shells, the so-called internal half-shell is introduced into the other so-called external half-shell with which it co-operates frictionally, until coming substantially into abutment against the bottom of said external half-shell, and . the end of the external half-shell is crimped onto the bottom of the internal half-shell.
• FIG. 1 is a side sectional view of a first embodiment of the enclosure according to the invention.
• FIG. 2 is a view along arrow II of Figure 1.
• FIG. 3 is a side sectional view of another embodiment with elastomeric seal.
• FIG. 4 is a sectional view, in detail, of the fixing of a tube on a bottom, with seal.
• Figure 1 shows an enclosure 1 for passage of a pressurized liquid for air conditioning circuit.
• the enclosure comprises a first bell-shaped half-shell, made of aluminum alloy, external, formed by a thin cylindrical wall 3 for example from 1 to 3 mm thick, provided on one side with a bottom 4, for example of similar thickness over part of the surface and from 1 to 2 cm in thickness over 1 • other support part of the tubes which will be described below.
• the bottom is of external diameter equal to the external diameter of the wall 3 with which it is formed in one piece, for example by impact spinning.
• the enclosure also comprises a second half-shell 5, bell-shaped and made of aluminum alloy, internal, comprising a thin cylindrical wall 6, for example from 1 to 3 mm thick, of external diameter substantially equal to the diameter internal of the wall 3 of the external half-shell with which it cooperates in friction or substantially in friction over its entire surface.
• the internal half-shell 5 also comprises a bottom 7, for example of variable thickness between 3 and 15 mm, of which an external portion 8 is for example of external diameter a little less than the external diameter of the cylindrical wall 7, to form a shoulder 9.
• the half-shell 5 is for example also obtained by impact spinning.
• the half-shell 5 is pressed or embedded in the first half-shell 2 until the end portion 10 of said half-shell 5 comes into abutment on the surface internal 11 of the bottom 4 of the first half-shell 2.
• the internal diameter of the cylindrical wall 3 of the first half-shell has a narrowing 12 at the end portion 10, for example over 1 or 2 cm.
• This narrowing is for example conical with an angle equal to that of a Morse angle (2 to 3 e ) and allows a force fitting of said end portion, which can itself be slightly bevelled to facilitate the effect of corner.
• the two half-shells are fixed to each other by gluing, for example by means of one or more beads of glue, for example of the type known under the brand name K ⁇ MMERLING, under the reference CORAPOX 562L2, or by means of a thin film of said glue distributed over the entire internal surface of the wall 3, or on the external surface of the wall 6.
• glue for example of the type known under the brand name K ⁇ MMERLING, under the reference CORAPOX 562L2
• a thin film of said glue distributed over the entire internal surface of the wall 3, or on the external surface of the wall 6.
• the first half-shell is further set on the periphery 13 of the bottom 7 of the half-shell 5, in a manner known in itself.
• the glue trapped between the shoulder 9 and the constriction 12 at the end portion 10 of the half-shell 5, is polymerized by heating, thus allowing the fixing of the half-shells together, good mechanical strength and excellent sealing.
• 1 • total thickness of the wall of 1 • enclosure obtained by superposition of the walls 3 and 6 may be less than that of a single wall, for the same performance with respect to pressure, this which allows gains in material.
• the bottoms 4 and 7 of the two half-shells are each and respectively pierced right through with identical cylindrical orifices 14 and 15 with an axis 14 • and 15 ′ parallel to the axis 1 • of the cylindrical walls of the enclosure 1 .
• the diameter of these orifices is substantially equal to one third of the diameter of the internal cylindrical wall 6.
• the angle ⁇ formed in the plane transverse to the enclosure by the straight lines passing through the centers of the two orifices and the center of the cylindrical enclosure is for example 120 ° (see FIG. 2).
• An advantage of the present invention is in fact to be able to give this angle an optimum value taking into account the installation constraints.
• Each orifice comprises an internal shoulder 16, 17 or in other words has an additional peripheral cylindrical annular recess opening out on the side of the enclosure.
• the shoulder is for example located at two thirds with respect to the internal surface of the corresponding bottom.
• Each orifice 14 and 15 is provided with an aluminum alloy connecting tube 16, 17 for the passage of the coolant, with an external diameter equal to the internal diameter of the orifice.
• the tubes can also be made of steel for example.
• the drawing of the aluminum alloy tubes also deforms the ends of the latter which fill the peripheral annular recesses of the orifices.
• the tubes are also fixed by gluing, a film of glue of the type described above having been previously deposited inside the shouldered orifices.
• the swelling of the tubes when they are stamped makes it possible to trap the adhesive, before its polymerization, for example by heating.
• Such seals can in particular be added when the diameter of the enclosure becomes large, for example greater than 10 cm.
• FIG. 3 therefore shows the enclosure provided with two O-rings 20 and 21, for example made of an elastomer of the type known under the brand VITON, placed between the external surface of the internal wall 6 of the half-shell 5 and the internal surface of the outer wall 3 of the half-shell 2.
• the first seal 20 is wedged between the shoulder 9 and the wall 3 which is crimped at this level around the bottom 7.
• the seal 21 is in turn inserted into an external groove 22 in the end portion 10 of the half-shell 5.
• Each tube can also be provided with an O-ring 23 (see FIG. 4) disposed in a recess 24 made on the external face 25 of the bottom 4 or 7, wedged between said recess and the fold 18 of the tube 16 or 17, a fold which preferably comes into contact with said external face 25.
• the tubes 16 or 17 are for example connecting tubes with a flexible hose (not shown), the fixing of one to the other being carried out in a manner known per se, for example by crimping a ring 26 in bell-shaped, fixed between two folds 27 of the tube, on the flexible hose, for example made of elastomer.
• the tubes 16 and 17 are fixed in the orifices previously coated with glue by stamping and deformation of said tubes in the orifices.
• the internal surface of the half-shell 3 is then coated with several beads of glue of the type known under the name KOMMERLING, for example in three regularly spaced circular bands,
• a circular groove 12 • is provided on the internal surface of the wall 6, for example obtained by folding the wall 6, near the open end of the external half-shell, in which a bead of glue is arranged.
• the internal half-shell 6 is then introduced into the other half-shell by applying pressure, for example 1 or 2 bars, until the portion 10 reaches the abutment against the internal surface of the bottom 3. Then the end of the external half-shell is crimped in a manner known per se on the bottom of the internal half-shell.
• an enclosure according to the invention for example designed from 1070 aluminum alloy (standard NFA02104), of the following dimensions: external diameter: 50 mm length: 50 to 70 mm total thickness (2 cylindrical walls): 2.8 mm
• the invention is not limited to the embodiments more particularly described but on the contrary embraces all variants and in particular those where the material used is a plastic material such as polyamide reinforced with glass fibers; the crimping is carried out by spinning or by magneto-forming; a single bottom is pierced with two orifices, the enclosure further comprising dehydrating means.
• the material used is a plastic material such as polyamide reinforced with glass fibers; the crimping is carried out by spinning or by magneto-forming; a single bottom is pierced with two orifices, the enclosure further comprising dehydrating means.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)
• Physical Or Chemical Processes And Apparatus (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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Citations (2)

• 1993
  • 1993-06-21 FR FR9307496A patent/FR2706977B1/fr not_active Expired - Fee Related
• 1994
  • 1994-04-21 EP EP94913679A patent/EP0705406B1/fr not_active Expired - Lifetime
  • 1994-04-21 WO PCT/FR1994/000455 patent/WO1995000796A1/fr active IP Right Grant
  • 1994-04-21 DE DE69419419T patent/DE69419419T2/de not_active Expired - Fee Related

Patent Citations (2)

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