Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C7/00—Rotary-piston machines or pumps with fluid ring or the like
• • 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
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
• • 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
  • F04D29/52—Casings; Connections of working fluid for axial pumps
  • F04D29/528—Casings; Connections of working fluid for axial pumps especially adapted for liquid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D3/00—Axial-flow pumps
  • F04D3/02—Axial-flow pumps of screw type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
  • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
  • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
  • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating

Definitions

• the present invention relates to a liquid ring screw pump design, including a housing with a suction inlet part and a pressure outlet part and within the housing rotatably provided Archimedes screw driven by a motor via a shaft.
• EP patent No. 0 454 794 also filed by the applicant, further shows a revolutionary improvement of a vacuum sewage system where the liquid ring screw pump is provided with a grinder or macerator and is connected directly with the suction pipe of the system, whereby vacuum is generated in the sewage suction pipe and sewage is discharged directly from the system by means of the pump.
• the present invention may, or may not include such grinder provided at the inlet end of the Archimedes screw rotor.
• Liquid ring screw pumps of the above-mentioned type commonly comprise a housing with a suction inlet part at one end and a pressure outlet part at the other end and within the housing rotatably provided Archimedes screw which is driven by an electric motor via a shaft.
• the known prior art pump and motor as for instance shown in the above EP patent No. 0 454 794, is commonly provided with four or more separate legs or supports by which the pump and motor is attached to the floor ground where it is provided.
• liquid ring screw pump solution which is based on a much simpler design which is much simpler to produce and install.
• the invention is characterized by the features as defined in the attached independent claim 1.
• Fig. 1 shows a liquid ring screw pump according to the known (prior art) design including a common support solution
• Fig. 2 shows a liquid ring screw with a support design according to the invention.
• Fig. 3 shows a cross section of the pump as shown in Fig. 2.
• Fig. 1 shows, as stated above, an example of a known liquid ring screw pump 1 including a housing 2 with a suction inlet section 4 at one end and a pressure outlet section 3 at the other end and within the housing 2 rotatably provided Archimedes screw (not shown) driven by a motor 6 via a shaft (neither not shown).
• the inlet section 4 further includes a suction chamber which is provided with a front cover or lid 5 which is fastened to the suction chamber by means a flange connection 7 with a plurality of screw and nuts 8.
• the pump including the motor is provided with two pairs of legs or supports 9, whereof one leg or support 9 for each pair is shown in the figures (the legs on the other side are not shown).
• some known solution even may have three or more pair of legs including at least one for the motor 6.
• the legs or supports 9 of this known prior art solution are provided on intermediate ring elements 14.
• the housing 2 with the suction inlet section 4 and pressure outlet section 3 are detachably held together by means of longitudinally provided bolts 13 through these intermediate elements 14.
• Fig. 2 shows a liquid ring pump according to the invention.
• the novel and inventive design feature of the solution as shown in this figure is the use of only one pair of legs or supports 10 provided preferably at a weight balance point between the motor 6 and pump 1 .
• each leg or support 10 is designed with two wings or flaps 1 1 longitudinally arranged in relation to the pump 1 and motor 6, each with through going screw holes 12 for the attachment of the pump/motor to the floor or ground where it is supposed to be placed or used.
• the leg or support 10 is constructed as an integrated part of the pressure outlet section 3 of the pump 1 and may preferably be made of metal such as aluminium or steel by casting in one piece and then machined to finished product.
• the inlet suction section 4 and pump housing 2 may be made of polymer composite material such as composite Poly Amid (PA) or Poly Propylene (PP) materials.
• PA Composite Poly Amid
• PP Poly Propylene
• the pump according to the preferred embodiment of the invention as described above may be made of a combination of metal and polymer composite material
• the whole pump (all sections 2, 3 and 4 of the pump) may be made of metal or it may be made completely of a composite polymer or other suitable material.
• the leg or support 10 does not have to form part of the pressure section 3 as shown in Fig. 2 and explained above, but may be made as part of the pump section 2 or even as part of the motor 6. It is however important that the design of the leg or support is provided such in relation to the pump and rotor that it weight wise establishes a weight balance between this pump and motor.
• Fig. 3 shows a cross section of the pump and motor as shown in Fig. 3.
• the pump is provided with only two bearings for the pump and motor, one 17 at the rear end of the electrical motor 6 and the other 16 at the pressure outlet section 3 of the pump 1 .
• the bearing 16 is provided in a recess 18 of the pressure outlet section 3 of the pump. This represents a very simple and cheap, but still strong and reliable bearing solution.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Details And Applications Of Rotary Liquid Pumps (AREA)
• Applications Or Details Of Rotary Compressors (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=49916371

Family Applications (1)

Country Status (3)

Families Citing this family (5)

Family Cites Families (24)

• 2013
  • 2013-07-04 EP EP13816030.4A patent/EP2870365A4/de not_active Withdrawn
  • 2013-07-04 US US14/413,961 patent/US20150176581A1/en not_active Abandoned
  • 2013-07-04 WO PCT/NO2013/000029 patent/WO2014011055A1/en active Application Filing

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