Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
  • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
  • F04D29/4266—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps made of sheet metal

Definitions

• the invention relates to a centrifugal pump housing according to the preamble of the main claim.
• Centrifugal pump housings of this type are, on the one hand, loaded by external pipeline forces and, on the other hand, they are subjected to high internal pressures.
• the invention is therefore based on the object of developing a shape for a centrifugal pump housing designed as a sheet metal construction which remains stable under the influence of high internal pressures. This object is achieved in accordance with the characterizing part of the main claim.
• the inventive integration of the suction-side connection flange into the housing shell results in a spherical or arcuate course of the pressure-receiving housing between the pressure-side fastening flange and the connection point of the suction line. This creates a housing that is highly protected against deformation.
• the bead-like free spaces that are required for the assembly of the flange connection screws require additional stiffening of the housing shell.
• One embodiment of the invention provides that the bead-like free spaces are provided with disk-shaped counter bearings in the area of the suction-side connecting flange. This embodiment is used in those cases in which the nuts of the flange screw connections are bead-shaped in these
• Free spaces can be arranged. Because of the counter bearing, the flanges of the suction line to be connected and the suction nozzle integrated into the housing rail can then be connected to one another.
• a separate ring flange is connected to the housing shell in the area of the suction-side connecting flange.
• the housing shell here has, in addition to the bead-like spaces for the flanking, a shoulder on which an annular flange lies flush and is firmly connected to the housing shell.
• This ring flange which can also be designed as an individual part made of sheet metal, brings about a further stiffening of the housing shell.
• a further embodiment of the invention provides that the housing shell is provided with an insert which forms the suction nozzle and which provides a gap seal with the impeller.
• This insert which can be inserted into the housing shell from the pressure side, for example, can be produced as a simple tubular part. Depending on its design, it can interact directly with the suction mouth of the impeller and thus form a gap seal, or it can accommodate a suitably shaped split ring that interacts with the suction mouth of the impeller.
• the housing shell is provided with a one-part or multi-part insert which forms the suction nozzle and / or the wheel side space on the suction side.
• This measure can serve to improve the hydraulic properties within the housing shell, on the other hand it also offers the possibility of further stiffening the housing shell.
• a further embodiment of the invention works, according to which within the housing between the suction nozzle and the
• Stiffening means surrounding the suction port are arranged. These can be appropriately designed sheet metal parts which, for example, extend between the split ring area and the bead-like free spaces.
• the space inside the housing shell and surrounding the suction nozzle can be filled with appropriate potting materials as well. These can be of a metallic type, but it is also possible to use appropriate plastics.
• Fig. 1 to 3 a housing shell, the bead-like free spaces are provided with counter bearings and the
• the housing shell 1 is provided on the pressure side with a mounting flange 2, which ensures the connection of the housing shell with a bearing block or block motor, not shown.
• Impeller 3 shown in a radial design.
• the housing shell 1 extends from the pressure-side mounting flange 2 approximately in an arc shape to the suction-side connection flange 4. This is formed by a sealing surface 5, above which in the
• Housing shell beads-like free spaces 6 are stamped, which are provided in this embodiment for receiving nuts 7 for flange bolts not shown.
• the free spaces have a size that allows the nuts 7 to be held with an appropriate tool.
• the suction nozzle 9, which is arranged within the housing shell 1 due to this design, is provided with a split ring 10 into which the suction mouth of the impeller 3 is immersed.
• the housing shell 1, including the flange sealing surface 5 is designed as a one-piece molded sheet metal part.
• the Fig. In contrast to FIG. 1, 2 has a suction nozzle 9, which, in order to improve the hydraulic properties within the pressure chamber 11, has one on the suction side
• Wheel side space reducing insert 12 is integrally formed. This insert can be inserted into the housing from the pressure side without difficulty and can be connected to the housing shell 1 on the outer and inner circumference by weld seams 13, 14. Appropriately attached
• the Fig. 3 shows a front view of the housing shell designed according to the invention and shows how the disk-shaped counter-bearings 8 close the bead-like free spaces 6 in the area of the fastening nuts 7.
• the Fig. 4 shows a housing shell 1, in which the suction-side connection flange is formed by a separate ring flange 15 which is flush with the rear surface of the
• Housing shell 1 abuts. In the area of the mounting holes 16 for the flange ver see the nuts 7 shown here lie in the bead-like free spaces 6.
• the ring flange 15 can with the housing shell 1 by a circumferential weld 17 or. appropriately attached spot welds are firmly connected.
• one Suction nozzle 9 is in turn designed as a simple tubular single part provided with a split ring.
• the Fig. 5 shows one of the FIG. 4 different variant, similar to the Fig. 2 a reducing the wheel space
• the object 12 has, which is formed in one piece with the suction nozzle 9. To stiffen the suction-side area of the housing shell, it is possible to provide the space 1 8, which surrounds the suction nozzle 9, with additional stiffening means. This can - not shown here -
• Be support elements that connect the area of the bead-like free spaces 6 located within the housing shell 1 to the area of the split ring 10. Filling with a correspondingly rigid casting compound, which improves the compressive strength of the housing, can just as well be.
• this housing is extremely resistant to pressure loads both from the inside and from the outside.
• FIG. 6 again shows one of the FIG. 3 corresponding front view of the housing shell 1, from which it can be seen how the ring flange 1 5 acts in the bead-like free spaces 6 as a counter bearing for the nuts 7. Due to the flush contact of the ring flange 1 5 on the housing shell 1, the
• Ring flange 1 5 som it to the load-bearing component of the housing.
• the arcuate course of the housing shell 1, which is also spherical, conical or, as shown in the exemplary embodiments, from a combination thereof, has a very high strength against the possible pressure forces that occur.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6271012

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (4)

Citations (2)

Family Cites Families (2)

• 1985
  • 1985-05-17 DE DE19853517827 patent/DE3517827A1/de active Granted
• 1986
  • 1986-05-09 EP EP86902795A patent/EP0259313B1/de not_active Expired
  • 1986-05-09 DE DE8686902795T patent/DE3661759D1/de not_active Expired
  • 1986-05-09 WO PCT/DE1986/000188 patent/WO1986006800A1/de active IP Right Grant
  • 1986-05-09 JP JP61502737A patent/JPS63500817A/ja active Granted
  • 1986-05-13 CA CA000509011A patent/CA1266797A/en not_active Expired - Lifetime
  • 1986-05-13 IN IN363/CAL/86A patent/IN165644B/en unknown
  • 1986-05-16 CN CN86103310.8A patent/CN1004645B/zh not_active Expired

Patent Citations (2)

Also Published As

Similar Documents

Legal Events