EP2761180B1 - Verdrängerpumpe - Google Patents

Verdrängerpumpe Download PDF

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Publication number
EP2761180B1
EP2761180B1 EP12770085.4A EP12770085A EP2761180B1 EP 2761180 B1 EP2761180 B1 EP 2761180B1 EP 12770085 A EP12770085 A EP 12770085A EP 2761180 B1 EP2761180 B1 EP 2761180B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
piston
pump
membrane
channel
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
Application number
EP12770085.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2761180A2 (de
Inventor
Alfred GIESSBACH
Norbert Jaeger
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.)
Mhwirth GmbH
Original Assignee
Mhwirth GmbH
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
Priority claimed from DE102011054074A external-priority patent/DE102011054074A1/de
Priority claimed from DE102011054073A external-priority patent/DE102011054073A1/de
Application filed by Mhwirth GmbH filed Critical Mhwirth GmbH
Publication of EP2761180A2 publication Critical patent/EP2761180A2/de
Application granted granted Critical
Publication of EP2761180B1 publication Critical patent/EP2761180B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • 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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • 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
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/1095—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers having two or more pumping chambers in series

Definitions

  • the invention relates to a positive displacement pump.
  • the EP 0 484 575 A1 shows a pump with a membrane in which the defined by the membrane active plane, which in turn is defined by the clamped in the diaphragm housing edge, extending vertically.
  • the DE 12 54 968 B shows a pump that has no membrane.
  • WO 2010/098707 A1 and US 4 188 170 A disclose pumps in which the cylinder and the diaphragm always lie in line and are not spaced by a channel extending obliquely to the cylinder.
  • the US 4,427,350 A discloses a pump in which the membrane is moved by a heating and cooling process and no cylinder with a piston whose movement is transferable to the membrane, is provided.
  • the US 4,008,009 shows a pump in which openings are integrated into the diaphragm housing and no extending from the cylinder channel to the flange of which the diaphragm receiving diaphragm housing is attached, is provided.
  • the DE 28 55 167 A1 shows a pump with a displacer, which acts without a channel extending obliquely to a cylinder on a membrane and in which no working volume is provided, which is partially formed by a diagonally from the horizontal cylinder Vietnameserteckenden channel.
  • the DE 10 61 186 which shows a pump according to the preamble of claim 1.
  • the working volume is not partially formed by an obliquely extending from the horizontal cylinder upwardly extending channel, at the flange of which the membrane receiving membrane housing is attached. This document does not show a flanged diaphragm housing and no obliquely upwardly extending from the cylinder channel.
  • the invention has set itself the task of creating such a pump with improved life.
  • the diaphragm is arranged at a position different from a vertical position, in particular by 45 ° to 90 °, very particularly by approximately 70 °.
  • the piston diaphragm pump according to the invention is - as usual for the promotion of sludge in excavation planned piston diaphragm pump - arranged such that the (or in multiple pumps the) cylinder with its (their) longitudinal axis (s) is arranged horizontally (are). So it can drive and piston /
  • the working volume is partially formed by a channel extending obliquely upwardly from the cylinder.
  • the channel is straight and formed on the channel housing forming the channel is a perpendicular to the longitudinal axis of the channel aligned flange, on which a membrane receiving membrane housing is attached.
  • the membrane is preferably formed approximately circular and has an edge which is clamped in the diaphragm housing approximately in a plane, wherein the plane in a vertical position preferably by 45 ° to 90 °, more preferably arranged at such an angle location is, so that the highest point of the working volume is formed at a lateral edge region.
  • the drive unit 1 comprises a drive shaft 19, which is rotated by a motor, not shown, for example, an electric motor in rotation.
  • a motor not shown, for example, an electric motor in rotation.
  • On the drive shaft 19 at least one only indicated gear is arranged, which meshes with at least one much larger, merely indicated gear of the crankshaft 18.
  • the drive shaft 19 is made on both sides the housing of the drive unit ( Fig. 2 ).
  • On the crankshaft three connecting rods 18a are arranged relatively close together.
  • the connecting rods are mounted on the crankshaft with the help of a connecting rod bearing, which is designed as a roller bearing.
  • the connecting rods transmit their movement in each case by means of a crosshead 20 to a crosshead rod 21, which merges into a piston rod 9.
  • the crosshead bearing is also a rolling bearing.
  • the crosshead also includes sliding blocks, which serve its linear bearing on the Gleitlagerwandungen.
  • a piston 7 is arranged, which performs a rectilinear reciprocating movement in a cylinder 5.
  • a pump unit 2 On the drive unit 1, a pump unit 2 is provided. This provides a work medium space 23 adjacent to each cylinder 5, in which working medium 22, for example hydraulic oil, is provided, which transmits the movement of the piston 7 to the membrane 6.
  • working medium 22 for example hydraulic oil
  • Fig. 1 The positions of the piston 7 and the diaphragm 6 to each other do not correspond to the ordinary operation.
  • the membrane 6 In normal operation, the membrane 6 is not shown in the extreme right position of the piston 7 shown in the left extreme position shown, but arranged in the right extreme position, not shown.
  • the membrane 6 forms together with a part of the diaphragm housing 6a a working space 4. This is about check valves 13 with a pressure tube 17 and a in Fig. 1 Not shown suction pipe connected.
  • the suction pipe is disposed below the Saugventilgebliuses 15 and connected thereto.
  • a rotational movement of the crankshaft 18 causes working fluid 22 to be moved back and forth in the working fluid space 23, deflecting the diaphragm 6, 6 'alternately to the right and left.
  • a deflection to the left leads to a closing of the Auslass Wegtschsventilsils or pressure valve in the pressure valve housing 14 and to a suction of fluid through the open inlet check valve or suction valve in the Saugventilgephase 15.
  • the subsequent displacement of the piston according to Fig. 1 to the right leads to a closing of the inlet check valve and a delivery of the displacement or displaced piston volume corresponding volume of delivery volume via the now open outlet check valve with displacement of the membrane based Fig. 1 to the right.
  • FIGS. 3 and 4 show a known from the prior art duplex pump, ie a pump with two connecting rods, piston rods, pistons and cylinders. This is double acting. It has four membrane housing 6a, 6a 'and is used in particular for larger volume flows.
  • FIGS. 5 to 9 show the pump unit 2 of a positive displacement pump according to the invention.
  • This is a piston diaphragm pump.
  • the displacement elements 3, 3 ' are therefore membranes 6, 6'.
  • the illustrated embodiment of the pump according to the invention is designated as a whole by 100 ( FIGS. 10 to 13 ). It can be seen that the illustrated pump 100 according to the invention is a triplet pump or triplex pump. So there are three connecting rods 18 a present, which cooperate with three moving in three cylinders 5 piston 7.
  • the drive unit 1 of the illustrated pump according to the invention is substantially identical to the drive unit 1 of the single-acting triplex pump known from the prior art (US Pat. Figures 1 and 2 ) match.
  • FIGS. 1 and 13 show, assume the previous piston 7 and the previous cylinder 5 ( Fig. 1 ) now at least also management tasks.
  • On the previous piston is right (based on Fig. 1 ) arranged an extension of the piston rod 9, to which now the piston 7 is fixed.
  • the piston 7 separates the cylinder 5 in a region which is connected to a working medium space 23 inclined to the drive unit and a region which communicates with a working medium space 23 'inclined away from the drive unit.
  • In the working medium spaces 23, 23 'working or transmission medium 22, 22' is arranged, which may be, for example, hydraulic oil.
  • the left surface 10 'of the piston displaces the working medium 22 arranged in the left working medium space 23, which leads to an upward pushing of the left diaphragm 6'. Both in his right movement, as well as in his left movement of the piston 7 thus causes an admission of one of the two membranes 6, 6 'with pressure.
  • Fig. 7 shows, the working spaces 4, 4 'in each case via a pressure valve in a pressure valve housing 14, 14' connected to a pressure pipe 17, 17 'and a suction valve in a Saugventilgephaseuse 15 with a suction pipe 16.
  • Fig. 9 shows that per membrane 6 exactly one suction valve and exactly one pressure valve are provided. The suction valves act on a single suction pipe 16, while the pressure valves on two pressure pipes 17, 17 'distribute.
  • the technical data of the illustrated embodiment of the positive displacement pump according to the invention are as follows: piston diameter: 275 mm, piston stroke: 508 mm, volume flow (design normal) 351 m 3 / h, maximum volume flow 385 m 3 / h, theoretical flow rate per crankshaft rotation: 173.4 l, volumetric efficiency: 0.94, normal number of strokes: 35.9 min -1 , maximum stroke rate: 39.4 min -1 , normal delivery pressure: 80.0 bar, maximum delivery pressure: 96.0 bar, internal gear ratio: 3.8077, piston rod load at normal delivery pressure: 475 kN, piston rod load at maximum delivery pressure: 570 kN, bearing life when operating at maximum load: 445.700 h, Bearing life in normal operation: 810,500 h, displaced piston volume Front: 30.2 l, displaced piston volume Rear: 27.6 l, required membrane type in liters: 47 I.
  • FIGS. 1 and 2 The single-acting triplex pump shown requires three diaphragms with a size of 60 l, the operating hours of the membrane are set at 3,000, and the number of membrane changes per year (8,000 h) is 2.67.
  • the positive displacement pump according to the invention shown requires six membranes, whose size is designed for 47 l, the operating hours are set at 4,500, it is expected up to 8,000 operating hours with a possible new development of the membranes, the number of membrane changes per year is 1.78, or the number of expected membrane changes per year is 1.
  • the in Fig. 1 Single-acting triplex pump shown requires six API 13 valves, with 1,200 operating hours.
  • the average velocity of the valves is 1.72 and the number of valve changes per year (8.000 h) is 6.67.
  • valves also the size API 13, with 1,800 operating hours.
  • the average velocity is 1.29
  • the expected operating hours are 2,160 due to the reduced speed (velocitiy)
  • the valve changes per year are 4.44 and the expected valve changes per year are 3.7.
  • FIG Fig. 1 Reduced piston rod load by more than 20%, reduced crankshaft load due to double action, 33% reduction in piston speed, extended service life of bearings and all pump drive unit components, up to full 30 years of service life, less wear and tear and increased pump unit life by at least 25%, at least twice the diaphragm life, higher pump efficiency, a potentially higher volumetric flow rate with lower piston rod loading, lower maintenance costs due to fewer maintenance cycles per year, less production downtime and reduced holding head (NPSHr) of the pump.
  • NPSHr reduced holding head
  • Fig. 13 also shows that the membranes 6, 6 'are not vertical, but are inclined from the vertical S by an angle ⁇ .
  • the angle ⁇ can be between 1 ° and 90 °, in particular 60 ° and 80 °. In the illustrated embodiment, it is about 70 °.
  • the working medium space 23, 23 ' is formed cylindrically in its region adjacent to the membrane housing 6a, 6a'.
  • the cylinder axis is perpendicular to the diaphragm (in its neutral position).
  • the cylindrical region of the working medium space 23, 23 ' is thus inclined by an angle ⁇ from the vertical.
  • This angle can be 0 ° to 89 °. In the illustrated embodiment, it is about 20 °.
  • the angles ⁇ and ⁇ are combined for symmetry reasons always 90 °.
  • Fig. 14 and 15 as a whole with 200 designated piston diaphragm pump is - as in Fig. 14 can be seen - again designed as a three-piston diaphragm pump.
  • Fig. 15 shows a longitudinal section through the middle pump part.
  • the two other pump parts are designed accordingly.
  • the illustrated piston-diaphragm pump 200 comprises a motor-driven crankshaft 10, on the middle crank pin 102 of which a connecting rod 103 is mounted with the aid of a connecting rod bearing 104.
  • a crosshead 105 is mounted via a crosshead bearing 106.
  • the crosshead 105 includes sliding blocks 107, which serve its linear bearing on Gleitlagerwandungen 108.
  • a piston rod 109 is attached at one end.
  • the other end of the piston rod 109 carries a piston 110, which is designed as a double-acting piston and operates in a cylinder 111.
  • a piston 110 which is designed as a double-acting piston and operates in a cylinder 111.
  • Fig. 2 the right dead center is shown.
  • the cylinder 111 is arranged within a working volume, which is divided by the piston 110 into two working sub-volumes 112a, 112b. This in Fig. 2 right end of the working part volume 112b is closed by means of a cover 113. At the left end of the working volume 12a, a lid 114 is also attached, which is, however, provided with a central opening 115 for the passage of the piston rod 109. On the cover 114, a seal assembly 116 is provided, which seals the piston rod 109 against the lid 114 against leakage of working fluid from the working part volume 112.
  • the working fluid not shown in the drawing - usually hydraulic oil, therefore also called oil reservoir - fills the working volume 112a, 112b up to two membranes 117a, 117b, the in Fig. 15 (in terms of the dead center position of the piston 110 incorrectly) are shown in its central position.
  • the diaphragm shown at the left would be deflected downwards, the diaphragm 117b accordingly upward, as qualitatively in FIG Fig. 15 indicated by dashed lines.
  • the diaphragms 117a, 117b are disposed in diaphragm housings 118a, 118b and separate diaphragm chambers 119a, 119b from the oil reservoir located in the working volume 112a, 112b.
  • the diaphragm housings 118a, 118b are fixed to flanges 120a, 120b of duct housings 121a, 121b.
  • the channel housings 121a, 121b include channels 122a, 122b which form parts of the working volume 112a, 112b.
  • the two channel housings 121a, 121b which are substantially straight, each form an angle of approximately 20 ° to the vertical, such that the distance between the two channel housings 121a, 121b increases in the upward direction.
  • the membrane housings 118a, 118b in which the membranes 117a, 117b are clamped with their flat edge regions 123a, 123b, are fastened to the flanges 120a, 120b in such a way that the membranes 117a, 117b are perpendicular to the longitudinal axis of the respective channel in their plane middle position 122a, 122b.
  • the two membranes 117a, 117b thus arranged inclined by about 70 ° from the vertical.
  • Each diaphragm chamber comprises an inlet 124a, 124b, to each of which an inlet check valve 125a, 125b (s. Fig. 14 ) is flanged.
  • the membrane chambers 119a, 119b comprise outlets 126a, 126b, to each of which an outlet check valve 127a, 127b is flanged.
  • a rotational operation of the crankshaft 101 causes the working fluid in the working fluid volume 112a, 112b and the diaphragms 117a, 117b to be reciprocated between the extreme deflections shown in dashed lines.
  • a deflection in each case leads down to a suction of sludge through the respective open inlet check valve.
  • This pumping phase is referred to as a suction cycle.
  • the subsequent displacement of the piston leads to a closing of the previously opened inlet check valve and a discharge of the volume corresponding volume of sludge via the now open outlet check valve with displacement of the membrane in the upwardly curved, in Fig. 15 Dashed extreme position.
  • the two membrane housings in the highest edge area of the membranes 117a, 117b are marked with 128a, 128b in the drawing provided not shown vent valves.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP12770085.4A 2011-09-30 2012-09-28 Verdrängerpumpe Active EP2761180B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011054074A DE102011054074A1 (de) 2011-09-30 2011-09-30 Verdrängerpumpe
DE102011054073A DE102011054073A1 (de) 2011-09-30 2011-09-30 Betriebsverfahren einer Kolben-Membranpumpe sowie Kolben-Membranpumpe
PCT/EP2012/069160 WO2013045598A2 (de) 2011-09-30 2012-09-28 Verdrängerpumpe und betriebsverfahren derselben

Publications (2)

Publication Number Publication Date
EP2761180A2 EP2761180A2 (de) 2014-08-06
EP2761180B1 true EP2761180B1 (de) 2018-11-21

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EP12770085.4A Active EP2761180B1 (de) 2011-09-30 2012-09-28 Verdrängerpumpe

Country Status (9)

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US (1) US9695808B2 (pt)
EP (1) EP2761180B1 (pt)
AU (2) AU2012314408B2 (pt)
BR (1) BR112014007364B1 (pt)
CA (1) CA2861136C (pt)
CL (1) CL2014000755A1 (pt)
IN (1) IN2014CN03132A (pt)
PE (1) PE20141978A1 (pt)
WO (1) WO2013045598A2 (pt)

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Also Published As

Publication number Publication date
EP2761180A2 (de) 2014-08-06
US9695808B2 (en) 2017-07-04
AU2016203015A1 (en) 2016-06-02
IN2014CN03132A (pt) 2015-07-03
US20140248160A1 (en) 2014-09-04
CA2861136A1 (en) 2013-04-04
AU2016203015B2 (en) 2018-06-14
BR112014007364B1 (pt) 2021-09-28
AU2012314408A1 (en) 2014-05-08
AU2012314408B2 (en) 2016-05-26
WO2013045598A3 (de) 2013-05-30
PE20141978A1 (es) 2014-12-18
CL2014000755A1 (es) 2014-07-25
WO2013045598A2 (de) 2013-04-04
CA2861136C (en) 2018-04-24
BR112014007364A2 (pt) 2017-04-04

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