EP0702155B1 - Pompe pour fluides chauds et corrosifs - Google Patents

Pompe pour fluides chauds et corrosifs Download PDF

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Publication number
EP0702155B1
EP0702155B1 EP95113673A EP95113673A EP0702155B1 EP 0702155 B1 EP0702155 B1 EP 0702155B1 EP 95113673 A EP95113673 A EP 95113673A EP 95113673 A EP95113673 A EP 95113673A EP 0702155 B1 EP0702155 B1 EP 0702155B1
Authority
EP
European Patent Office
Prior art keywords
pump
drive section
pump body
shaft
pressure
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.)
Expired - Lifetime
Application number
EP95113673A
Other languages
German (de)
English (en)
Other versions
EP0702155A3 (fr
EP0702155A2 (fr
Inventor
Hans-Ulrich Dr. Dummersdorf
Helmut Dr. Waldmann
Helmut Dr. Härle
Franz-Rudolf Dr. Minz
Fritz Dr. Gestermann
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.)
Bayer AG
Original Assignee
Bayer AG
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Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0702155A2 publication Critical patent/EP0702155A2/fr
Publication of EP0702155A3 publication Critical patent/EP0702155A3/fr
Application granted granted Critical
Publication of EP0702155B1 publication Critical patent/EP0702155B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096—Heating; Cooling
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0069—Magnetic couplings

Definitions

  • the invention relates to a pump for conveying corrosive media of high Temperature and a method of operating this pump.
  • Pumps for delivery dangerous media are known. Most of them are magnetically coupled pumps used to seal problems on otherwise inevitable drive shaft bushings to avoid.
  • the medium itself is used to lubricate the Bearing, which is usually in the vicinity of the internal magnets is used, so it fills the entire pump interior.
  • For corrosive Media can use different materials for the entire pump interior be used.
  • It is also known to pump the pump room e.g. Seal mechanical seals against the pump interior and the nearby to lubricate the inner bearings of the inner magnets separately, e.g. through a Side flow of the medium.
  • These pumps have the disadvantage that they are highly corrosive Media cannot be funded.
  • a pump set for pumping becomes hotter Media described, which has a cooling flow such that the Cooling air flow of the electric motor driving the pump towards the Bearing bracket and magnetic coupling is steered.
  • This will simplify the design Also show the operating temperature of the magnets and the bearings Delivery of hot media is lowered and the pump remains operational.
  • a such a pump is not suitable for pumping hot and highly corrosive Media, such as molten salt, since there are a large number of parts in contact with the media Interior exists that corrodes in a very short time due to the molten salt would.
  • the proposed pump can, however Do not meet the requirement, immediately in its closest to the pump housing horizontal bearing a secure seal against a highly corrosive to be promoted Medium to ensure what is known with, in the construction presented necessary sealing materials cannot be realized.
  • the provided cooling of the inner bearings for crystallization of the salt melt in Bear bearings, which are not only destroyed by corrosion, but also through erosion.
  • a passage of molten salt the pump housing through the internal bearings into the pump interior can not be prevented with the proposed solution, since no suitable Sealing materials are available. However, such an operation destroys the Pump within a very short time.
  • a preferred embodiment is that the rotary movement in Drive part is transmitted to the drive shaft by a magnetic coupling.
  • the dry-running bearing in the drive part advantageously consists of a ceramic Roller bearing.
  • the task continues through a method of operating the pump solved, in which according to the invention the gas flow channel via the feed pipe is acted upon with a hot gas, which the drive part by the Leaves discharge pipe again, the form is set so that the static pressure of the gas in the gas flow channel above the stator ring is the pressure of the pumped medium which partially or the pump body completely filled out.
  • the temperature of the hot gas is raised a value above 120 ° C and the static pressure of the hot gas in the Flow channel set to a value above 1.5 bar.
  • Hot steam is advantageously used as the hot gas.
  • the hot gas pressure is expediently adjusted to a by a control loop Setpoint adjusted, which is above the delivery pressure of the pump funded medium.
  • the figure shows the basic structure a high temperature and corrosion resistant pump based on a magnetically coupled Gear pump.
  • the pump is in the pump body 1 and drive part 2 divided, the pump body 1 and the drive part 2 by one in the Pump body 1 fitted ceramic stator ring 3 are separated by the the drive shaft 4 (pump shaft) is passed.
  • the opening in the stator ring 3 for carrying out the pump shaft 4 has a slightly larger one Diameter than the pump shaft, so that between the pump shaft 4 and the A sealing gap 5 remains on the inner surface at the opening of the stator ring.
  • the pump body 1 consists of all parts in contact with the medium a high temperature and corrosion resistant material such as ceramics, stoneware etc.
  • the actual pump consists of a gear pump 6, which is in the pump body 1 is arranged and also including the pump shaft from a ceramic material is made.
  • the hot corrosive medium to be conveyed flows through the intake port 7 of the gear pump 6 vertically in the direction of Gears, is compressed between the teeth and leaves the pump through a corresponding pressure port on the opposite side of the gear pump 6.
  • the pump shaft or drive shaft 4 is in the drive part 2 with a cylindrical cage anchor 9 firmly connected, which is in a correspondingly large Housing opening 10 in the drive part 2 can rotate freely.
  • the cage anchor 9 is by means of ceramic roller bearings 11 which are between the cage anchor 9 and one firmly connected to the pump part 1, in the axial direction extending cylindrical bearing shell 12 are arranged.
  • a cup-shaped one in the drive part 2 Concentrically around the cage anchor 9 there is a cup-shaped one in the drive part 2 Rotor 13 arranged which in via a drive shaft 14 with an electric motor Connection is established. On the inside of the rotor 13 is a magnetic pole ring 15 arranged, which together with a counter magnetic pole ring 16 on the Cage anchor 9 forms a magnetic coupling, which is used to transmit the rotary movement from the motor shaft 14 to the drive / pump shaft 4.
  • the motor shaft 14 but could also be directly connected to the drive shaft 4.
  • a further conventional seal e.g. a Mechanical seal 17 can be provided.
  • the drive part 2 and in particular the cage anchor 9 is provided with a gas flow channel 18.
  • the Gas flow channel 18 is filled with hot gas or Superheated steam applied.
  • the hot gas first flows through a radial, annular section, then through an axial gap parallel to Bearing shell 12, the ceramic roller bearings 11 are flowed around and finally leaves the drive part 2 through a discharge pipe 20.
  • Der Gas flow channel 18 is also above an annular connecting channel 21 parallel to the drive shaft 4 with the sealing gap 5 between the stator ring 3 and Drive shaft 4 in connection.
  • the form for the hot gas at the supply nozzle 19 is chosen so high that the static pressure of the superheated steam in Connection gap 21 above the pressure of the pumped medium in the gear pump 6 lies. This can be avoided with certainty that the hot, aggressive Pumped medium, e.g. a molten salt, through the sealing gap 5 and Mechanical seal 17 enters drive part 2.
  • the pump body 1 including the gear pump 6 and the Drive shaft 4 are made of ceramic
  • the drive part except for the ceramic roller bearings 11 are made of metal, which is a decisive advantage of the Invention is.
  • the running surfaces of the roller bearing 11 are advantageous for reduction the sliding friction coated with a carbon film.
  • the pump according to the invention lies in the method according to the invention based on the following principle:
  • the medium e.g. a molten salt with a temperature of 500 ° C. sucked in via the intake port 7 of the gear pump 6, between the ceramic executed gears compresses and leaves the pump body 1 with a pressure of 5 bar.
  • the pump shaft 4 is connected to the stator ring 3 small game (sealing gap 5) performed.
  • the stator ring 3 separates the pump body 1 and the drive part 2 of the pump apart from one another Gap in relation to the pump shaft 4 or the pump body 1
  • Gas supply connector 19 is now the drive part 2 steam at a pressure of 5.1 bar and a temperature of 180 ° C pressure controlled, which the Leaves drive part 2 via the gas discharge nozzle 20 again.
  • the superheated steam, that flows through the drive part 2 has an important second function: He guarantees the important direct cooling of the pump magnets 16 and dry running camp 11 to temperatures below 350 ° C.
  • the drive part 2 is the penetration of 500 ° C hot molten salt effectively prevented in the drive part 2 and the pump magnets 16 for discharge of heat flowing from the pump body 1 into the drive part 2 cooled so that there is no impairment of their function.
  • the Bearing 11 intensively cooled with superheated steam. All existing in drive part 2 Components have no contact with the medium and can, with the exception of the ceramic and dry running bearing 11 e.g. out of ordinary Stainless steel.
  • the steam used in the drive part 2 of the pump, which heats up in the pump can then be used again.
  • the Pump should preferably be operated in an upright position so that the Pump body 1 below and the drive part 2 is arranged above it.
  • the entire pump body 1 is electrically heated from the outside to the pump Maintain working temperature and thermal stress in the ceramic components to prevent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Claims (8)

  1. Pompe pour transporter des milieux corrosifs chauds comportant une partie d'entraínement (2) et un corps de pompe (1), où l'arbre d'entraínement (4) est étanchéifié par rapport au milieu par le biais d'une garniture d'étanchéité d'arbre, caractérisée en ce que
    a) la garniture d'étanchéité d'arbre consiste en une bague de stator (3) montée dans le corps de pompe (1) et/ou dans la partie d'entraínement (2) et que traverse l'arbre d'entraínement (4) en ménageant un interstice d'étanchéité (5),
    b) le corps de pompe (1) et la bague de stator (3) y compris toutes les parties en contact avec les milieux dans le corps de pompe (1) sont en un matériau résistant à la corrosion et aux hautes températures,
    c) un ou plusieurs paliers fonctionnant à sec (11) sont disposés dans la partie d'entraínement (2) pour le logement de l'arbre d'entraínement (4) et
    d) la partie d'entraínement (2) comporte un canal à courant de gaz (18) avec une tubulure d'amenée (19) et une tubulure d'évacuation (20), qui est en liaison par la technologie d'écoulement avec l'interstice d'étanchéité (5), et le palier fonctionnant à sec (11) est un palier à roulement céramique.
  2. Pompe selon la revendication 1, caractérisée en ce qu'un couplage magnétique (15, 16) pour la transmission du mouvement de rotation à l'arbre d'entraínement (4) est prévu dans la partie d'entraínement (2).
  3. Pompe selon les revendications 1 et 2, caractérisée en ce que le palier fonctionnant à sec (11) possède sur les surfaces de roulement des revêtements pour réduire le coefficient de frottement par glissement.
  4. Pompe selon les revendications 1 à 3, caractérisée en ce qu'une autre garniture d'étanchéité d'arbre (17) est prévue entre la bague de stator (3) et la partie d'entraínement (2).
  5. Procédé pour exploiter la pompe selon les revendications 1 à 4, caractérisé en ce que le canal à écoulement de gaz (18) est alimenté par la tubulure d'amenée (19) avec un gaz chaud qui quitte la partie d'entraínement (2) par la tubulure d'évacuation (20) et en ce que, la pression d'alimentation est ajustée alors de telle manière que la pression statique du gaz dans le canal à écoulement de gaz (18) est située, au-dessus de la bague de stator (3), au-delà de la pression du milieu transporté qui remplit partiellement ou totalement le corps de pompe (1).
  6. Procédé selon la revendication 5, caractérisé en ce que la température du gaz chaud est supérieure à 120°C et la pression statique du gaz chaud dans le canal à écoulement de gaz (18) est supérieure à 1,5 bar.
  7. Procédé selon les revendications 5 et 6, caractérisé en ce que de la vapeur chaude est introduite comme gaz chaud.
  8. Procédé selon les revendications 5 à 7, caractérisé en ce que la pression du gaz chaud est régulée à une valeur de consigne qui est supérieure à la pression de transport du milieu transporté par la pompe.
EP95113673A 1994-09-13 1995-08-31 Pompe pour fluides chauds et corrosifs Expired - Lifetime EP0702155B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4432551A DE4432551A1 (de) 1994-09-13 1994-09-13 Pumpe zur Förderung heißer, korrosiver Medien
DE4432551 1994-09-13

Publications (3)

Publication Number Publication Date
EP0702155A2 EP0702155A2 (fr) 1996-03-20
EP0702155A3 EP0702155A3 (fr) 1997-01-08
EP0702155B1 true EP0702155B1 (fr) 2001-11-07

Family

ID=6528081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113673A Expired - Lifetime EP0702155B1 (fr) 1994-09-13 1995-08-31 Pompe pour fluides chauds et corrosifs

Country Status (6)

Country Link
US (1) US5569024A (fr)
EP (1) EP0702155B1 (fr)
JP (1) JPH0893639A (fr)
CA (1) CA2157843A1 (fr)
DE (1) DE4432551A1 (fr)
ES (1) ES2167390T3 (fr)

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US5725362A (en) * 1995-05-09 1998-03-10 Xolox Corporation Pump assembly
DE19543325A1 (de) * 1995-11-21 1997-05-22 Bayer Ag Pumpe für heiße korrosive Schmelzen
US7287398B2 (en) * 2001-09-25 2007-10-30 Alsius Corporation Heating/cooling system for indwelling heat exchange catheter
US6174151B1 (en) * 1998-11-17 2001-01-16 The Ohio State University Research Foundation Fluid energy transfer device
JP2001132411A (ja) * 1999-11-04 2001-05-15 Honda Motor Co Ltd 膨脹器の出力軸と被動機側の伝動軸との連結構造
US6612821B1 (en) * 2000-07-14 2003-09-02 Fluid Management, Inc. Pump, in particular gear pump including ceramic gears and seal
US6997688B1 (en) 2003-03-06 2006-02-14 Innovative Mag-Drive, Llc Secondary containment for a magnetic-drive centrifugal pump
JP4245997B2 (ja) * 2003-07-07 2009-04-02 直樹 宮城 小形ギアポンプ
GB2426036A (en) * 2005-05-10 2006-11-15 Bernard Whicher Vertical Northey compressor
JP4640190B2 (ja) * 2006-01-20 2011-03-02 株式会社豊田自動織機 水素循環用電動ポンプ
EP2297464A1 (fr) * 2008-04-28 2011-03-23 Randell Technologies Inc. Ensemble rotor pour compresseur rotatif
US8646382B2 (en) * 2009-05-05 2014-02-11 Pearl City Manufacturing, Inc. Convection recirculating fryer for cooking foods
CN102939436B (zh) 2010-05-05 2016-03-23 能量转子股份有限公司 流体能量转换装置
US8714951B2 (en) * 2011-08-05 2014-05-06 Ener-G-Rotors, Inc. Fluid energy transfer device
ITPD20120320A1 (it) * 2012-10-29 2014-04-30 Pumps Srl M Pompa per altissime temperature
CN104329251A (zh) * 2014-10-30 2015-02-04 江苏海天泵阀制造有限公司 一种微型超低温磁力驱动齿轮泵
US10808694B2 (en) * 2016-08-15 2020-10-20 Georgia Tech Research Corporation Systems and devices for pumping and controlling high temperature fluids
CN109113950B (zh) * 2017-06-26 2020-08-25 比亚迪股份有限公司 电动油泵总成、转向系统和润滑系统
US12203475B2 (en) * 2022-08-23 2025-01-21 Saudi Arabian Oil Company Magnetic drive sealless pumps with steam jacket

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Also Published As

Publication number Publication date
US5569024A (en) 1996-10-29
CA2157843A1 (fr) 1996-03-14
JPH0893639A (ja) 1996-04-09
DE4432551A1 (de) 1996-03-14
EP0702155A3 (fr) 1997-01-08
ES2167390T3 (es) 2002-05-16
EP0702155A2 (fr) 1996-03-20

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