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WO1996012893A1 - Pompe du type moineau - Google Patents

Pompe du type moineau Download PDF

Info

Publication number
WO1996012893A1
WO1996012893A1 PCT/HU1995/000053 HU9500053W WO9612893A1 WO 1996012893 A1 WO1996012893 A1 WO 1996012893A1 HU 9500053 W HU9500053 W HU 9500053W WO 9612893 A1 WO9612893 A1 WO 9612893A1
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
screw
machine
walls
housing
Prior art date
Application number
PCT/HU1995/000053
Other languages
English (en)
Inventor
Gyo^'zo^' FERENCZY
Original Assignee
Diósgyo^'ri Szivattyúgyár Kft.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Diósgyo^'ri Szivattyúgyár Kft. filed Critical Diósgyo^'ri Szivattyúgyár Kft.
Publication of WO1996012893A1 publication Critical patent/WO1996012893A1/fr

Links

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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1076—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member orbits or wobbles relative to the other member which rotates around a fixed axis

Definitions

  • This invention relates to a rotary machine, preferably pump or compressor comprising a screw with a driving unit, a housing provided with suction and delivery openings and a prism shaped membrane body arranged between said housing and said screw
  • turbine pumps those types suitable for rather high delivery performance are the turbine pumps, while those with rather high lift capabilities are piston pumps.
  • turbine pumps have characteristically low lift and piston pumps characteristically low delivery. Accordingly, neither of these pump types has favourable performance characteristics in terms of practical requirements.
  • the membrane pumps are suitable rather for low performance requirements with regard both to lift and to delivery and, at the same time, because of the need for reciprocating motion and the need to provide them with rectification valves, they may be viewed as mechanisms relatively complicated and expensive in their construction. A further disad ⁇ vantage is the pulsating nature of the delivery.
  • screw pumps would be optimal for small and medium power and delivery applications and, by virtue of this more widely used.
  • This type of pump is, however, also rather complicated and expensive in their construction. Furthermore, they are vulnerable to the possible corrosive and erodent influence of the fluids being delivered, and to unfavourable lubrication and fric ⁇ tion characteristics, since the delivery of the fluid has to be performed by parts with fitting surfaces produced with the most costly machining work. For this reason, the double screw pump is suitable for continuous operation only when delivering fluids which are suitably clean and lubrifying.
  • a single screw pump variety comprises characteristically a housing, provided with a two-start rib spiral on its internal surface which is in moving contact with the rotating screw, and the requirement is that these two parts make also planetary movements with respect to each other, which either demands complicated costly design or, otherwise, or involves very unfavourable, high level of friction relatively high rate of wear in the mechanism.
  • the housing should necessarily be made in this latter case with a rather thick wall and of a very deformable structural material for the necessary planetary motion to be made possible; but, in this design, high and asymmetrical pressure and frictional forces arise which, in turn, result in significantly increased energy input due to reduced efficiency and which may lead to relatively early damage, depending on the character of the fluid being delivered.
  • the sides, formed as plane faces, of the prism membrane employed in this screw-membrane pump are joined to each other at distances corresponding with the external diameter of the screw and with rounded segments in order to reduce to an acceptable value the tensions caused by deformation demands arising during operation and, thereby, to attain the desired working life.
  • the object of the invention is primarily to provide a membrane screw pump which may be designed for long life without reduction of the delivery indeed such that it may be possible to increase both the lift and the delivery together.
  • the invention achieves this objective by improved joining the sides of the prism-shaped membrane to each other. As a result of this, the magnitude of the critical working tensions in the membrane may be reduced and, at the same time, the volume of the delivery chambers between the housing and the membrane may be increased, as can the speed of the machine.
  • the rotary machine preferably ferably pump or compressor is comprising a screw coupled with a driving unit, a housing provided with suction and delivery openings and a prism-shaped membrane body arranged between said housing and said screw, wherein the side walls of the prism-shaped membrane are connected to each other by curved segments arranged outside the space defined by the outer diameter of the screw and/or by the inner surfaces of the membrane.
  • the inner surfaces of the membrane are preferably plain or convex surfaces and the developed length of the convex walls of the membrane is about equal to the inner perimeter of the housing.
  • the curved segments are generally concave surfaces.
  • the walls of the membrane are of resilient homogeneous material and may be provided with reinforcing coils springs, filaments or textile inserts, wherein these filaments or coil springs extend in directions corresponding to the pitch of the screw.
  • the walls of the membrane are consisting of zones of different elastic modulus or of zones of different wall thicknesses, wherein the zones extend in directions corresponding to the pitch of the screw.
  • the invention is based on the following recognitions:
  • the effective cubic capacity, and thus also the displacement may be increased still further.
  • a further recognition relating to ability to increase performance is that, in order to counteract external demands for flexibility arising in the parts unsupported between the crests of the screw, in the vicinity of the edges of the sides of the prism membrane, namely in the section of the membrane body subjected to the fluid pressure it is preferable to form the walls of the membrane with a convex shape and/or to reinforce these with embedded fibre or textile insert.
  • a further, related recognition is that fibre or textile reinforcement of very low extensibility and high strength can be embedded into the membrane by which means the lift and the working life can both be increased several times. As a result, the importance of the strength characteristics of the structural material of the membrane is decreasing.
  • Another design possibility with similar effect is embedding preferably pre- stressed a row of coil springs into the sides of the membrane made of homogeneous structural material or made as described in the foregoing, set in a suitable direction.
  • the strength properties of the membrane wall, so produced, are favourably dependent upon direction the values parallel to the axis of the screw are higher than those in a direction perpendicular to this, i.e. the extensibility of the membrane wall is greater in the latter direction, and these properties contribute to their fitting more efficiently into the grooves of the screw.
  • Another possible method for achieving a more efficient fit into the grooves is creating, inside the membrane body during assembly, a pressure lower than that in the delivery chamber (preferably a vacuum).
  • the best and simplest method of maintaining this condition is employing a motor whose housing is open only at its drive end, and so the internal spaces of the two parts may be joined by a safe static seal.
  • Slip is produced only between the surfaces of the screw and the inner surface of the membrane body. These surfaces can be produced as lapped faces and lubricant can be arranged between them.
  • the machine can be used for delivering different fluids being corrosive or erodent and it can be adapted to different purposes by applying appropriate material for the parts of the machine.
  • the machine is also suitable for being applied as a feeding pump as well as a compressor for producing pressurised air.
  • the machine of the invention may be a pump or compressor and is very advantageous compared to other designs for pumping corrosive and erodent fluids, or for compressing gases.
  • the membrane body may be made of a laminate material and, where applicable, have a corrugated internal and/or external surface.
  • the essence of the invention is therefore an improved membrane body arranged between the moving parts of the pump. Due to this improved membrane body, the loading of the operating parts can be reduced and the machine comprises only three relatively small parts, whereby the machine operates in a new, improved way, due to the construction of the parts and to the presence of the membrane body.
  • Fig. 1 is the longitudinal section of a pump according to the invention.
  • Fig. 2 is section ll-ll of Fig. 1.
  • a screw 2 provided with an outer thread having an ace rounded profile.
  • the prism shape membrane 3 prepared with a special, star formed cross section. Shoulder 6 of the elastic prism-shaped membrane 3 is clamped between flange 1 1 of housing 1 and the front surface of the housing of the motor 17.
  • Screw 2 is connected to the shaft 16 of the driving motor 17.
  • the pump can provide any needed pressure.
  • the fluid enters the delivery chambers 10 through suction opening 14 and leaves the pump through delivery opening 15.
  • the walls 4 of the membrane 3 are connected to each other by segments 5 arranged outside the space defined by the outer diamater of the screw 2. Due to the above fact the bending movements have a greater space along these segments during operation and accordingly the bending stresses are reduced. This will result in a longer service time.
  • the clamping of the membrane 3 according to the invention enables to apply deeper threads, which in turn goes with an increased delivery.
  • the space between the screw and the membrane body is filled with lubricant, which can circulate through channels 12 and 13. Accordingly, the friction between the moving parts is considerably reduced.

Landscapes

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

Abstract

Machine rotative comportant une vis associée à une unité d'entraînement, un carter pourvu d'orifices d'aspiration et de refoulement, et un corps de membrane prismatique intercalé entre ledit carter et ladite vis. Les parois latérales (4) de la membrane prismatique (3) sont reliées entre elles par des segments curvilignes (5) situés en dehors du volume délimité par le diamètre externe de la vis (2) et/ou par les surfaces internes des parois de la membrane (3). Ladite membrane (3) peut être pourvue de ressorts hélicoïdaux, de filaments ou de pièces rapportées en textile pour le renforcement, et/ou de zones ayant des modules d'élasticité différents ou des parois d'épaisseurs différentes.
PCT/HU1995/000053 1994-10-21 1995-10-20 Pompe du type moineau WO1996012893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUP9403027 1994-10-21
HU9403027A HUT72342A (en) 1994-10-21 1994-10-21 Rotary-piston machine

Publications (1)

Publication Number Publication Date
WO1996012893A1 true WO1996012893A1 (fr) 1996-05-02

Family

ID=10985672

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU1995/000053 WO1996012893A1 (fr) 1994-10-21 1995-10-20 Pompe du type moineau

Country Status (2)

Country Link
HU (1) HUT72342A (fr)
WO (1) WO1996012893A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9624724B2 (en) 2012-11-20 2017-04-18 Halliburton Energy Services, Inc. Acoustic signal enhancement apparatus, systems, and methods
US10184333B2 (en) 2012-11-20 2019-01-22 Halliburton Energy Services, Inc. Dynamic agitation control apparatus, systems, and methods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229643A (en) * 1962-06-12 1966-01-18 Roudaut Philippe Robert Louis Rotary pump
WO1994018454A1 (fr) * 1993-02-12 1994-08-18 Diósgyori Szivattyúgyár Kft. Machine rotative d'alimentation en liquides ou en gaz

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229643A (en) * 1962-06-12 1966-01-18 Roudaut Philippe Robert Louis Rotary pump
WO1994018454A1 (fr) * 1993-02-12 1994-08-18 Diósgyori Szivattyúgyár Kft. Machine rotative d'alimentation en liquides ou en gaz

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9624724B2 (en) 2012-11-20 2017-04-18 Halliburton Energy Services, Inc. Acoustic signal enhancement apparatus, systems, and methods
US10184333B2 (en) 2012-11-20 2019-01-22 Halliburton Energy Services, Inc. Dynamic agitation control apparatus, systems, and methods

Also Published As

Publication number Publication date
HUT72342A (en) 1996-04-29
HU9403027D0 (en) 1994-12-28

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