EP2082134B1 - Transmission apparatus in homogeniser or high pressure piston pump - Google Patents
Transmission apparatus in homogeniser or high pressure piston pump Download PDFInfo
- Publication number
- EP2082134B1 EP2082134B1 EP06821731A EP06821731A EP2082134B1 EP 2082134 B1 EP2082134 B1 EP 2082134B1 EP 06821731 A EP06821731 A EP 06821731A EP 06821731 A EP06821731 A EP 06821731A EP 2082134 B1 EP2082134 B1 EP 2082134B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reducer
- fixed body
- crankshaft
- motor
- flange
- 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.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 35
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 66
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 230000003534 oscillatory effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/146—Piston-rod guiding arrangements
-
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Abstract
Description
- The present invention relates to a transmission apparatus, in a homogeniser or high pressure piston pump, said apparatus comprising: a fixed body housing a rotating crankshaft, a motor able to actuate the crankshaft, a reducer interconnected between said shaft and said transmission means. Documents
US-A-223/131 ,US-A-2419775 US-A-1385141 andGB-A 547455 - The present invention further relates to a technical solution for the assembly of a transmission apparatus, for a homogeniser or high pressure piston pump.
- Within the field of the treatment of high pressure fluids (indicatively, from 150 to 1,500 bar), in particular with regard to applications involving emulsion micronisation, stabilisation of spills and also the controlled cellular rapture / break-up of a fluid, apparatuses known as homogenisers are frequently used. Such apparatuses generally comprise a piston pump part, used to achieve the reciprocating motion of the pumping pistons, synchronous and mutually offset by an angle 360°/n where n is the number of the pistons. In particular, the Italian patent application
PR99A000045 - In known solutions, the connection between the reducer, the pump and the motor takes place according to a fastening / assembly technique called "pendulum-like". Said technique provides for keying the reducer (in particular, the slow shaft of the reducer) directly on a projection of the crankshaft of the pump and connecting, by means of a belt and pulley system, the fast shaft of the reducer to the motor. In this way, the reducer is movable relative to the pump body, because it can rotate around the axis defined by the crankshaft. This possibility of rotating the reducer around the crankshaft is exploited when assembling the transmission apparatus, to apply the necessary tension to the belt system in order to transit the driving torque from the motor to the crankshaft. In known solutions, the distance between the motor and pump body is fixed, therefore a rotation of the reducer around its own slow shaft (connected to the crankshaft) entails a change in the distance between the fast shaft of the same reducer and the motor, starting from the assumption that the reducer is of the kind with non coaxial shafts. The pendulum-like mounting of the reducer also provides for the presence of a reaction arm, which fastens the reducer to a fixed frame, exerting thereon a traction force in a direction that is parallel and is opposite in direction relative to the tension of the belt, to counter-balance it. The pendulum-like mounting of the reducer is convenient during the assembly stage, because the belt is tensioned acting on the reaction arm, whose length can be varied. However, said known technical solution entails some disadvantages, because it introduces unwanted stresses and oscillations in the transmission apparatus. In the first place, it should be noted that the weight of the reducer, mounted in overhang on the end of the shaft, is fully borne by the crankshaft and by its bearings; therefore; the weight of the reducer generates a flexing moment on the crankshaft.
- Moreover, the fact that the tension force of the belts and the reaction discharged by the reaction arm and their components act on two different, albeit parallel, planes, produces on the body of the reducer a torque characterised by an arm equal to the distance between the two parallel planes of action of the forces (in turn identified by the axis of the tension of the belts and by the axis of the reaction arm, respectively), which generates an additional flexing moment discharged on the crankshaft.
- Said forces entail an oscillatory motion of the reducer both relative to a plane that is orthogonal to the axis of the crankshaft, and relative to a reference plane that is perpendicular to the crankshaft, resulting in a complex oscillatory motion; moreover, said flexing moments combine with the twisting moment due to point load stresses generated by the individual pumping pistons during the compression phase, in relation to the rotation of the crankshaft, thus subjecting it to undesired stresses. Therefore, prior art technical solutions globally entail possible limitations with regard to the reliability of the transmission system.
- An object of the present invention is to eliminate the aforesaid drawbacks and to make available a transmission apparatus, in a homogeniser or high pressure piston pump, that is particularly rugged and reliable, within a particularly simple and economical solutions, even in situations of unforeseeable overload of the machine due to incorrect conditions of use thereof .
- Said objects are fully achieved by the apparatus of the present invention, which is characterised by the content of the claims set out below and in particular in that it comprises means for rigidly hastening the reducer to said fixed body.
- An additional object of the present invention is to make available a method for assembling a transmission apparatus, in a homogeniser with high pressure piston pump, which assures ruggedness and reliability for the apparatus itself.
- Said object is fully achieved by the method of the present invention, which is characterised by the content of the claims set out below and in particular in that it comprises the following steps:
- fastening a reducer, keyed on the crankshaft, rigidly to said fixed body, in order to inhibit all oscillations of the reducer relative to the crankshaft;
- connecting the reducer to a motor by means of a system of transmission belts and associated pulleys;
- tensioning the transmission belts by translating the motor, said motor being movable relative to said fixed body;
- locking the motor relative to the fixed body, once tensioning is complete.
- This and other characteristics shall become more readily apparent from the following description of a preferred embodiment, illustrated surely by way of non limiting example in the accompanying drawing tables, in which:
-
Figure 1 . shows a perspective view of a transmission apparatus according to the present invention; -
Figure 2 shows the apparatus ofFigure 1 , according to a different perspective; -
Figure 3 shows a perspective view of an apparatus ofFigure 1 , open and in partial transparence; -
Figure 4 shows a view from a different perspective fromFigure 3 of an apparatus ofFigure 1 , open and in partial transparence; -
Figure 5 shows a section view of the apparatus ofFigure 1 . - With reference to
Figures 1 and 2 and 1, thenumber 1 designates a transmission apparatus in a homogeniser, thenumber 2 designates a fixed frame supporting thetransmission apparatus 1. Within saidtransmission apparatus 1, thereference number 3 designates an electric motor, connected to areducer 4 by means of a system of parallel belts 5 and pulleys 6. In turn, saidreducer 4 is connected to afixed body 7. Themotor 3 is originally movable relative to theframe 2, because is bears onslides 8, along which it can translate. The position of themotor 3 relative to theframe 2 is adjusted and fattened by actuating means, constituting, in the illustrated embodiment, by atie rod 9. -
Figures 3 and 4 show the connection between the fixed body. 7 and thereducer 4, the latter being shown in see-through view. Thefixed body 7, integral with theframe 2, houses acrankshaft 10, of a known kind, rotating within said fixedbody 7. The crankshaft. 10 has an overhang portion relative to thefixed body 7. On said portion of thecrankshaft 10, is keyed thereducer 4; therefore, thecrankshaft 10 defines the slow shaft of the reducer which, in the illustrated embodiment, is of the type with parallel axes. Thereference 11 designates a fast shaft of thereducer 4, which is set in rotation by themotor 3. Thereducer 4 is originally made integral with thefixed body 7 by fastening means. Said fastening means preferably comprise aflange 12, connected to thereducer 4 by means of a plurality ofscrews 13a and to thefixed body 7 by means of an additional plurality ofscrews 13b. Therefore, the flexing moment associate to the weight of thereducer 4 and every other flexing moment associated to the tension of the belt 6 originally unloads on thefixed body 7 through theflange 12, relieving thecrankshaft 10 from dangerous stresses, in particular the flexing moment generated by the torque identified by belt tension, reaction and related arm. Theflange 12 constitutes a rigid connection between thereducer 4 and thefixed body 7, able to inhibit the oscillations of the reducer, thanks to the presence of a plurality of screws, which work in shear mode, positioned in such a way as to surround theshaft 10, preferably, but not exclusively, distributed uniformly. - Note also that the
flange 12 for fastening thereducer 4 to thefixed body 7 must be constructed in such a way as to assure the coupling with thebody 7 itself both on a surface of thefixed body 7 perpendicular to thecrankshaft 10, both on a cylindrical surface coaxial with thecrankshaft 10, identified on thefixed body 7, thereby achieving a cylindrical coupling between reducer and body. In this way, an optimal distribution is obtained of the stresses between thereducer 4 and thefixed body 7, which are thus rigidly bound. However, in different embodiments, thereducer 4 can be connected to surfaces of thepump body 11 that are not orthogonal to thecrankshaft 10, or even to other surfaces, provided that it is rigidly fastened relative to thepump body 11 or to theframe 2, with no chance of being subjected to oscillations or vibrations. - It should also be observed that, when assembling the
transmission apparatus 1, the tensioning of the parallel belt system 5, is originally accomplished by moving themotor 3; in particular themotor 3 is translated along theslides 8, away from thereducer 4, which is fixed. - The present invention also makes available a method for assembling a
transmission apparatus 1, comprising apump 7 provided with acrankshaft 10 that rotates inside afixed body 7. Said method comprises the following steps: - fastening a reducer, keyed on the
crankshaft 10, rigidly to said fixed body, in order to inhibit all oscillations of the reducer relative to thecrankshaft 10; - connecting the
reducer 4 to amotor 3 by means of a system of transmission belts 5 and associated pulleys; - tensioning the transmission belt 5 by translating the
motor 3, said motor being movable relative to saidfixed body 7; - locking the
motor 3 relative to thefixed body 7, once tensioning is complete. - Said method originally enables to assemble the transmission Apparatus, tensioning the transmission belts 5, without moving the reducer, which always remains rigidly fastened to the
fixed body 7, i.e. integral with theframe 2. In this way, one also has the advantage of being able to use a reducer in which the slow shaft and the fast shaft are coaxial, limiting the overall bulk of the machine. Therefore, the described method assures a greater ruggedness and reliability of the transmission apparatus, because the stresses generated by the belt tensioning load are not discharged on thecrankshaft 10 but on the fixedbody 7, on theflange 12 and on the body of thereducer 4, by means of appropriate connecting members.
Claims (12)
- Transmission apparatus (1), in homogeniser or high pressure piston pump, said apparatus comprising:- a fixed body (7) housing a rotating crankshaft (10)- a motor (3) able to actuate the crankshaft (10);- a reducer (4) interconnected between said shaft (10) and transmission means (5, 6);characterised in that it comprises means for rigidly fixing the reducer (4) to said fixed body (7), said means comprising a flange (12) constituting a rigid connection between the reducer (4) and the fixed body (7) and achieving a cylindrical coupling between the reducer and the body (7), coaxial with the crankshaft (10)
- Apparatus as claimed in claim 1, characterised in that said means for fastening the reducer (4) are applied to at least one surface of said pump body (7) that is orthogonal to the axis of said shaft (10).
- Apparatus as claimed in any of the previous claims, wherein said transmission means comprise a system of belts (5) and related pulleys (6) for the transmission of motion from the motor (3) to the input shaft (11) of the reducer (4).
- Apparatus as claimed in claim 3, characterised in that it comprises means for moving the motor (3) relative to the fixed body (7), to tension said system of belts (5).
- Apparatus as claimed in claim 4, wherein said means for moving the motor comprise at least one slide (8) whereto is fastened the motor (3) and at least one actuating means (9), operatively active on the motor in a direction away from / towards the reducer (4).
- Apparatus as claimed in any of the previous claims, wherein said means for fastening the reducer (4) to the pump body comprise a flange (12), means for connecting said flange to the reducer (4) and means for connecting the flange (12) to the fixed body (7).
- Apparatus as claimed in claim 6, wherein said means for connecting the flange (12) to the reducer comprise a plurality of screws (13a).
- Apparatus as claimed in claim 6 or 7, wherein said means for connecting the flange (12) to the fixed body (7) comprise a plurality of screws (13b).
- Apparatus as claimed in claim 6, wherein the flange (12) is provided with a planar coupling surface that is orthogonal to the axis of symmetry of the flange and coincides with that of the crankshaft (10).
- Apparatus as claimed in claim 6, wherein the flange (12) is provided with a cylindrical coupling surface that is coaxial with the corresponding cylindrical surface of the fixed body (7), said surfaces being in turn coaxial with the axis of the crankshaft (10).
- Method for assembling a transmission apparatus, in homogeniser or high pressure piston pump, said apparatus comprising a fixed body (7) housing a rotating crankshaft (10), characterised in that it comprises the following steps:- fastening a reducer (4), keyed on the crankshaft (10), rigidly to said fixed body (7), in order to inhibit all oscillations of the reducer (4) relative to the crankshaft (10);- connecting the reducer (4) to a motor (3) by means of a system of transmission belts (5) and associated pulleys (6);- tensioning the transmission belts (5) by translating the motor (3), said motor being movable relative to said fixed body (7);- locking the motor relative to the fixed body, once tensioning is complete,said step of fastening the reducer (4) keyed on the crankshaft (10) to the fixed body (7) comprises a step of fastening a flange (12) to the fixed body (7) and a step of fastening the reducer (4) to the flange, said flange achieving a substantially cylindrical coupling.
- Homogeniser or high pressure piston pump, characterised in that it comprises a transmission apparatus (1) of the type claimed in any of the claims 1 through 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK06821731.4T DK2082134T3 (en) | 2006-10-10 | 2006-10-10 | Transmission apparatus in a homogenizer or high-pressure piston pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2006/000725 WO2008044253A1 (en) | 2006-10-10 | 2006-10-10 | Transmission apparatus in homogeniser or high pressure piston pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2082134A1 EP2082134A1 (en) | 2009-07-29 |
EP2082134B1 true EP2082134B1 (en) | 2010-02-17 |
Family
ID=38134285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06821731A Active EP2082134B1 (en) | 2006-10-10 | 2006-10-10 | Transmission apparatus in homogeniser or high pressure piston pump |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2082134B1 (en) |
AT (1) | ATE458145T1 (en) |
DE (1) | DE602006012384D1 (en) |
DK (1) | DK2082134T3 (en) |
WO (1) | WO2008044253A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1395630B1 (en) | 2009-09-10 | 2012-10-16 | Gea Niro Soavi S P A Ora Gea Mechanical Equipment Italia S P A | HIGH PRESSURE HOMOGENIZER WITH PLANETARY REDUCER |
CN103195682B (en) * | 2013-04-02 | 2015-09-09 | 上海正乾生物技术有限公司 | Double-module extra-high-pressure nano homogenizer |
ES1295974Y (en) * | 2022-10-15 | 2023-03-16 | Self Power Energy S L | Hydraulic or pneumatic machine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1385141A (en) * | 1920-01-16 | 1921-07-19 | F E Myers And Brother | Power-head |
US2231131A (en) * | 1937-06-14 | 1941-02-11 | Dempster Mill Mfg Company | Deep well pump |
GB547455A (en) * | 1940-06-15 | 1942-08-27 | Linde Air Prod Co | Improvements in method and apparatus for pumping volatile liquids |
US2419775A (en) * | 1944-07-03 | 1947-04-29 | Woodruff & Edwards Inc | Pump |
IT1248038B (en) * | 1991-06-11 | 1995-01-05 | Siti | DEVICE TO FEED LIQUID UNDER PRESSURE TO A HYDRAULIC CIRCUIT. |
US5551845A (en) * | 1995-01-10 | 1996-09-03 | Milam; David N. | Medical air vacuum |
IT1308543B1 (en) | 1999-05-18 | 2002-01-08 | Niro Soavi Spa | HIGH PRESSURE PUMP. |
-
2006
- 2006-10-10 WO PCT/IT2006/000725 patent/WO2008044253A1/en active Application Filing
- 2006-10-10 EP EP06821731A patent/EP2082134B1/en active Active
- 2006-10-10 DK DK06821731.4T patent/DK2082134T3/en active
- 2006-10-10 DE DE602006012384T patent/DE602006012384D1/en active Active
- 2006-10-10 AT AT06821731T patent/ATE458145T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK2082134T3 (en) | 2010-06-07 |
EP2082134A1 (en) | 2009-07-29 |
WO2008044253A1 (en) | 2008-04-17 |
DE602006012384D1 (en) | 2010-04-01 |
ATE458145T1 (en) | 2010-03-15 |
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