Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B23/00—Pumping installations or systems
  • F04B23/02—Pumping installations or systems having reservoirs
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/001—Noise damping
• • 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
  • F15B1/26—Supply reservoir or sump assemblies

Definitions

• Pressure fluid container for hydraulic units and on processes for their production
• the present invention relates to pressure medium containers for hydraulic units and to methods for their production.
• FIG. 1 Hydraulic delivery program of the Mannesmann Rexroth group of companies "Hydropumps for drive hydraulics" is shown, pressure medium tanks are known, on which a pump is attached, via which pressure medium can be removed from the pressure medium tank.
• An example of such a pump pressure medium container assembly is shown in FIG. 1.
• a suction line 1 of a pump 2 is immersed in a pressure medium 3 through an opening in a pressure medium container 4.
• the pressure medium container 4 has sheet metal sections which are welded at the edges. If the pump 2 is operated, vibrations of the pump are transmitted to the pressure medium container 4. Structure-borne noise spreads from one wall to the next. The noise emission increases due to the pressure medium container in a manner similar to that of a violin case.
• Another disadvantage of such a pressure medium container 4 according to the prior art is the increased cost of welding during its manufacture. Also, in the case of welded pressure medium containers, due to the temperatures that occur, no two-layer sheets with an intermediate plastic layer can be used, so that noise insulation by means of a plastic layer is not possible.
• the object of the present invention is to eliminate the disadvantage of the prior art and to provide a pressure medium container for a hydraulic unit in which the noise emission is reduced and in which sheets with a plastic layer can be used. Furthermore, an inexpensive method for producing such a pressure medium container is to be provided. This object is achieved by a pressure medium container according to claim 1 and a method according to claim 8.
• the inventive connection of sheet metal sections to overlapping sections by gluing reduces the transmission of noise between adjacent sheet metal sections, it being possible to set the noise emission by selecting a predetermined distance.
• Straight sheet metal sections are preferably introduced between two U-shaped sheet metal sections, so that a rectangular plan is produced.
• the U-shaped sheet metal sections and the straight sheet metal sections can be made in one piece with a base part. In this way, high mechanical stability can be obtained. This is particularly advantageous when short legs of the U-shaped sheet metal sections overlap the straight sheet metal sections, so that the adhesive point is only subjected to pressure and shear stress.
• the noise behavior can be further optimized by using a PU adhesive for the adhesive layer and a sheet with a plastic layer.
• the sheet metal sections after the sheet metal sections have been provided, they are joined to the overlap sections by gluing.
• the adhesive is preferably introduced after the sheet metal sections have been bent.
• FIG. 1 shows a pressure medium container for a hydraulic pump according to the prior art
• Fig. 2 shows a stamped sheet metal and provided with bending lines for producing a pressure medium container according to the invention
• Fig. 3 shows a plan view of a pressure medium container according to the invention.
• the starting point for the production of the pressure medium container according to the invention is a sheet shown in FIG. 2, which was stamped, for example, using a method known from the prior art.
• the sheet metal has a central sheet metal section 11 and sheet metal sections 12, 13, 14, 15, which are connected to the central sheet metal section 11 via bending lines.
• the sheet can be produced by any method from the prior art.
• the second and fourth sheet metal sections 12, 14 are provided in FIG. 2 on two opposite end sections of the central sheet metal section 11 and each have two overlapping sections 12a, 12b and 14c, 14d lying opposite to each other in the longitudinal direction.
• the overlap sections 12a, 12b and 14c, 14d are connected to the respective sheet section 12, 14 via the bending lines 17 shown in broken lines.
• the first and third sheet metal sections 13, 15 are arranged at opposite end sections of the central sheet metal section 11 and offset by 90 ° with respect to the second and fourth sheet metal sections 12, 14. Gaps 18a, 18b, 18c, 18d are provided between the end portions of the overlap portions 12a, 12b, 14c, 14d and the end portions 13a, 15b, 13c, 15d of the first and third sheet metal portions 13, 15 arranged adjacent to them in such a way that bending of the second and fourth sheet metal sections 12, 14 with respect to the central sheet metal section 11 and bending of the overlap sections 12a, 12b, 14c, 14d with respect to the central parts of the sheet metal sections 12, 14 is possible.
• first and third sheet metal sections 13, 15 are bent by 90 ° with respect to the central sheet metal section 11 at the bending lines 17.
• the second and fourth sheet metal sections 12, 14 are bent by 90 ° with respect to the central sheet metal section 11 at the bending lines 17.
• the overlapping sections 12a, 12b, 14c, 14d are bent by 90 ° with respect to the middle parts of the second and fourth sheet metal sections 12, 14, so that the inner sides of the overlapping sections 12a, 12b, 14c, 14d with respect to the middle sheet section 11 are the outer ones Sides of the end sections 13a, 15b, 13c, 15d lie opposite one another without the sheet metal sections 12, 13, 14, 15 touching.
• the overlap sections 12a, 12b, 14c, 14d and then the sheet metal sections 12, 14 can also be bent first.
• an adhesive layer 16a, 16b, 16c, 16d is interposed between the end section 13a and the overlap section 12a, the end section 15b and the overlap section 12b, the end section 13c and the overlap section 14c, the end section 15d and the overlap section 14d.
• a PU adhesive is preferably used.
• the thickness of the adhesive layer shown in FIG. 3 with "a", which corresponds to the distance between the sheet metal sections 12, 13, 14, 15, is selected so that, on the one hand, there is optimal damping between the sheet metal sections and, on the other hand, an admissible load due to shear is not is exceeded. In this way, the noise emission and the
• a two-layer sheet can also be used
• Plastic intermediate layer can be used because of the lack
• the adhesive layers 16a, 16b, 16c, 16d are only subjected to pressure and shear and not to tension.
• the reason for this is that the overlap sections 12a, 12b, 14c, 14d absorb the pressure acting on the first and third sheet metal sections 13, 15 in the form of a pressure load on the adhesive layers 16a, 16b, 16c, 16d.
• the present invention thus relates to a pressure medium container for hydraulic units, in which the wall sections are connected to one another by adhesive bonding.
• the thickness of the adhesive layer is chosen so that there is optimal noise damping and at the same time the permissible load due to shear is not exceeded.
• a sheet with a plastic layer is preferably used so that the noise emission is reduced more.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Laminated Bodies (AREA)
• Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7666776

Family Applications (1)

Country Status (3)

Families Citing this family (2)

Family Cites Families (10)

• 2000
  • 2000-12-12 DE DE10061794A patent/DE10061794A1/de not_active Withdrawn
• 2001
  • 2001-09-21 WO PCT/DE2001/003659 patent/WO2002048552A2/de not_active Application Discontinuation
  • 2001-09-21 EP EP01270703A patent/EP1342014A2/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events