EP3322898A1 - Pompe du type interchangeable - Google Patents

Pompe du type interchangeable

Info

Publication number
EP3322898A1
EP3322898A1 EP15787697.0A EP15787697A EP3322898A1 EP 3322898 A1 EP3322898 A1 EP 3322898A1 EP 15787697 A EP15787697 A EP 15787697A EP 3322898 A1 EP3322898 A1 EP 3322898A1
Authority
EP
European Patent Office
Prior art keywords
pump
lobe
screw
per
rotation
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP15787697.0A
Other languages
German (de)
English (en)
Inventor
Silvia MARIANETTI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3P Prinz SRL
Original Assignee
3P Prinz SRL
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 3P Prinz SRL filed Critical 3P Prinz SRL
Publication of EP3322898A1 publication Critical patent/EP3322898A1/fr
Withdrawn legal-status Critical Current

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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/85—Methods for improvement by repair or exchange of parts
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/70—Use of multiplicity of similar components; Modular construction

Definitions

  • the present invention refers to the technical field relative to the pumps for the sending/aspiration of a fluid.
  • the invention refers to a particularly versatile pump.
  • a pump is defined as volumetric when, as it is well known, it generates a push or an aspiration through a variation of volume.
  • the Lobe Pump transfers the product in a pulsating way, and this is not well seen in most food applications:
  • the pulsations cause vibrations, inconstant flow rates, difficulty in the measurement of the fluid and in the bottling.
  • the Screw Pump instead, lacks pulsations, and this feature is always more satisfying in food applications.
  • the Lobe Pump is not capable of rotating at high speeds to be able to make the CIP (Cleaning in Place) ; therefore, another pump has to be used (for example, a centrifugal pump), which is capable of producing higher speeds of the water flow and chemical products that make the CIP.
  • the Screw Pump instead, is capable of rotating both at low and high speeds, and is therefore capable of pumping a great variety of products (of various viscosities) and of making the CIP at 2000-3000 rpm.
  • the Lobe Pump is capable of pumping soft solid products (for instance, fruit or fruit pieces), also of big size, dissolved in a liquid; the Screw Pump, in order to be able to pump the same sizes of solids, has to be over-dimensioned with respect to the loads requested; further, the Screw Pump can damage a small percentage of the solids, while the Lobe Pump cannot; the Lobe Pump has the further advantage of being able to pump these solids also in liquids of medium viscosity, a feature that is instead more limiting in the screw pumps.
  • the Lobe Pump when it is operated at a low number of turns, can pump liquids very sensitive to shear forces, such as: diced fruit/vegetables , curd, fresh cheeses; the Screw Pump imposes shear forces that are slightly worse.
  • a screw pump foresees two screws enclosed by a body, placed in a parallel way between them and coupled in such a way that between them they can engage, rotating in a synchronized manner.
  • the reciprocal rotation and the engagement causes a translation of the entire volume comprised between the crests of the screws and the body that encloses them, causing the movement of the fluid according to a direction that depends on the sense of rotation.
  • the lobe pump substitutes the two screws coupled between them with two lobe rotors (not in contact between them) , whose rotation causes the movement of the fluid.
  • the first one is certainly that relative to the costs, because it is necessary to purchase two pumps of different nature, also when, for instance, the number of uses of one of the two types of pumps is very reduced with respect to the number of uses of the other pump. In any case, it is anyway necessary to foresee both types of pumps, the whole with an increase in the management costs.
  • Such a pump foresees rotation means (10', 20', 42, 43, 52, 53) that, through the rotation thereof, generate the aspiration/push of a fluid.
  • said rotation means are interchangeable in such a way as to be able to pass from a lobe pump configuration to a screw pump configuration and vice-versa.
  • FIG. 1 shows the pump in accordance with the invention, wherein the front part is interchangeable, that is that it can be every time removed and substituted, in such a way as to be able to have, when needed, a lobe pump or a screw pump;
  • figure 3 and figure 4 are views relative to the back part of the pump to which the interchangeable parts are connected;
  • a pump is represented as per the present invention which, as better clarified below, allows to interchange a front part relative to the lobes or screws, therefore rendering it versatile.
  • Figure 1 shows such a pump in which there is a fixed back part 2, better described below, and a front part (3', 3' ' ) , which is configured in such a way as to result interchangeable, in the sense that it can be substituted so that the pump results to be, according to the needs, a lobe or a screw pump.
  • Figure 1 in fact shows in a cross-section the arrangement of the screw solution and in a further cross- section the lobe solution.
  • Figure 2 highlights the back part in an axonometric view .
  • Figure 2 shows the two attachment holes (10, 20), where the rotation axes are inserted and/or exit on which, in an interchangeable manner, the lobe or screw system assembles .
  • the tabs 11 are highlighted that render integral to the rotation shaft the sleeve forming the screw or the lobe wheel.
  • the sleeves are inserted slidingly on the shaft in such a way that the tabs are inserted in a specific groove and so that said sleeves rotate integrally with the shaft.
  • Figure 5 shows for completeness a section of the back part and highlights the two rotation axes (10', 20') that emerge externally from it and connected to the axes (100, 110) .
  • Such axes (10' , 20' ) can be separable from the axes (100, 110) or be in a single piece.
  • FIG. 5 shows, naturally, the support rotation bearings 130 for the rotation of the shafts.
  • Two back dented wheels engage between them making that the two axes (100, 110) rotate between them in a synchronized manner.
  • a dented wheel that numbered with number 140
  • a back extension 110' of the axis 110 is foreseen, configured to connect to a conventional rotary engine (not shown in figure for descriptive simplicity) .
  • Figure 6 shows in a section the front part provided with two screws (41, 42) .
  • the elements 41 and 42 are two sleeves whose external form is that of screw and that are inserted slidingly on the shaft and dragged in rotation through the tab 11 arranged on each shaft.
  • the screw sleeves are blocked through nuts 50 in position and posteriorly they go in contact against a stop 51 in such a way as to result to be well packaged on the relative shaft.
  • the body (46, 46') is then fixed and a front cover 43 encloses the body and seals. It is further present an inlet/outlet hole for the fluid.
  • Enlargened figure 7 shows the three parts (43, 46, 46') assembled among them with the aspiration/exit openings (44, 44') of the fluid.
  • the sleeves (41, 42) are further highlighted with the form of screw and that are inserted slidingly and fixed to the shafts.
  • Figure 8 instead, shows a section of the lobe solution, which is substantially similar to that of screw described above.
  • the sleeve with the form of screw is substituted with a sleeve (52, 53) with the form of lobe wheel.
  • two lobe wheels (52, 53) are inserted slidingly each one on a shaft (10', 20') and constrained at rotation through the tab mentioned above.
  • Figure 9 shows the openings (56, 57) for inlet/outlet of the fluid and the two lobe wheels engaged between them.
  • the tabs are arranged in such a way that the two lobe wheels engage between them correctly as per figure 9.
  • Figure 10 similarly to the screw solution, shows the closing body composed of a front plug 61 and a lateral part 62 that forms together with the plug the volume of containment of the fluid.
  • the sleeves (52, 53) forming the lobe wheels are inserted slidingly (see figure 8) and are fixed with the bolts foreseen.
  • the front body (61, 62) is assembled .
  • the back engine that connects to the axis 110' will conduct the axes at the rotation speed, desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

La présente invention concerne une pompe, qui comprend des moyens de rotation (10', 20', 42, 43, 52, 53) pour générer l'aspiration/la poussée d'un fluide. Selon l'invention, lesdits moyens de rotation sont interchangeables de façon à être aptes à passer d'une configuration de pompe à lobe à une configuration de pompe à vis, et vice-versa.
EP15787697.0A 2015-07-14 2015-07-14 Pompe du type interchangeable Withdrawn EP3322898A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2015/000185 WO2017009877A1 (fr) 2015-07-14 2015-07-14 Pompe du type interchangeable

Publications (1)

Publication Number Publication Date
EP3322898A1 true EP3322898A1 (fr) 2018-05-23

Family

ID=54364626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15787697.0A Withdrawn EP3322898A1 (fr) 2015-07-14 2015-07-14 Pompe du type interchangeable

Country Status (2)

Country Link
EP (1) EP3322898A1 (fr)
WO (1) WO2017009877A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019128602B3 (de) * 2019-10-23 2021-02-11 Leistritz Pumpen Gmbh Schraubenspindelpumpe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102828952A (zh) * 2012-07-24 2012-12-19 中国科学院沈阳科学仪器股份有限公司 干式真空泵单元及具有该干式真空泵单元的干式真空泵

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293290A (en) * 1979-05-04 1981-10-06 Crepaco, Inc. Positive displacement rotary pump with bearings in countersunk portions of the rotors
DE102014000846A1 (de) * 2014-01-27 2015-07-30 Klaus Union Gmbh & Co. Kg Schraubenspindelpumpe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102828952A (zh) * 2012-07-24 2012-12-19 中国科学院沈阳科学仪器股份有限公司 干式真空泵单元及具有该干式真空泵单元的干式真空泵
WO2014015710A1 (fr) * 2012-07-24 2014-01-30 中国科学院沈阳科学仪器股份有限公司 Unité de pompe à vide sèche et pompe à vide sèche comprenant celle-ci

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2017009877A1 *

Also Published As

Publication number Publication date
WO2017009877A1 (fr) 2017-01-19

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