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DK168649B1 - Regenerative heat exchanger - Google Patents

Regenerative heat exchanger Download PDF

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Publication number
DK168649B1
DK168649B1 DK089292A DK89292A DK168649B1 DK 168649 B1 DK168649 B1 DK 168649B1 DK 089292 A DK089292 A DK 089292A DK 89292 A DK89292 A DK 89292A DK 168649 B1 DK168649 B1 DK 168649B1
Authority
DK
Denmark
Prior art keywords
rotor
heat exchanger
radial seal
guide shoe
regenerative heat
Prior art date
Application number
DK089292A
Other languages
Danish (da)
Other versions
DK89292A (en
DK89292D0 (en
Inventor
Bjarne Nygaard Madsen
Original Assignee
Burmeister & Wains Energi
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 Burmeister & Wains Energi filed Critical Burmeister & Wains Energi
Priority to DK089292A priority Critical patent/DK168649B1/en
Publication of DK89292D0 publication Critical patent/DK89292D0/en
Priority to PL93302676A priority patent/PL171829B1/en
Priority to PCT/DK1993/000228 priority patent/WO1994001730A1/en
Priority to AT93914650T priority patent/ATE131280T1/en
Priority to EP93914650A priority patent/EP0601167B1/en
Priority to ES93914650T priority patent/ES2080623T3/en
Priority to DE69300967T priority patent/DE69300967T2/en
Publication of DK89292A publication Critical patent/DK89292A/en
Application granted granted Critical
Publication of DK168649B1 publication Critical patent/DK168649B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/047—Sealing means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Power Steering Mechanism (AREA)
  • Sealing Devices (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Braking Arrangements (AREA)
  • Air Supply (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The heat exchanger (1) has a rotor (1) with radial sealing devices (2, 15) which by means of counterweight (10, 23) over link connections are kept against the rotor. A spacing device (24) comprises an adjustable spindle carrying a slide shoe (33) made of carbon which slides against a smooth face (13) of the rotor, thereby determining the gap between the radial sealing device and the rotor.

Description

DK 168649 B1 iDK 168649 B1 i

Opfindelsen vedrører en regnerativ varmeveksler omfattende en som en rotor udformet varmevekslermatrix, der ved hver ende har en glat, aksial flade ved periferien, og ved hver ende en radialtætning, der af en 5 kontravægt via en lænkeledsforbindelse holdes mod rotoren, samt en afstandsindretning til styring af ak-sialafstanden mellem radialtætningen og rotoren.The invention relates to a regenerative heat exchanger comprising a rotor heat exchanger matrix having at each end a smooth axial surface at the periphery and at each end a radial seal held by a counterweight via a link joint to the rotor, and a spacer for control of the axial distance between the radial seal and the rotor.

Fra DE offentliggørelsesskrift nr. 1 035 843 kendes en varmeveksler af den ovenfor beskrevne art, 10 hvor afstands indretningen dannes af en rulle, der er drejeligt ophængt i radialtætningen og løber på en ringformet skinne ved rotorens endeflade. Det angives, at driften af rullerne besværliggøres på grund af højt støvindhold af gassen, der føres gennem varmeveksleren, 15 og der angives forskellige kombinationer af størrelser og materialer for rullen og dens akselbolt som skal kunne formindske disse vanskeligheder! I teksten til DE patentskrift nr. 1 133 850 beskrives et lignende arrangement, og det anføres, at sliddet på rullen, som 20 følge af de store kraftpåvirkninger og indvirkningen af støv og høj temperatur er så stort, at rullens levetid er kort, og det tilrådes at anvende en anden løsning, der ikke er baseret på mekanisk berøring mellem radialtætningen og rotoren.DE publication 01035843 discloses a heat exchanger of the type described above, wherein the spacer is formed by a roller rotatably suspended in the radial seal and running on an annular rail at the end surface of the rotor. It is stated that the operation of the rollers is made more difficult by the high dust content of the gas passing through the heat exchanger, 15 and various combinations of sizes and materials are indicated for the roll and its shaft bolt to reduce these difficulties! The text of DE patent specification No. 1,133,850 describes a similar arrangement and it is stated that the wear of the roller due to the large force effects and the effect of dust and high temperature is so large that the life of the roller is short and it it is advisable to use another solution that is not based on mechanical contact between the radial seal and the rotor.

25 Det er hensigten med opfindelsen at angive en regnerativ luftforvarmer, hvor størrelsen af spalten styres på en simpel måde, uden at der optræder de u-lemper, der er beskrevet ovenfor.SUMMARY OF THE INVENTION It is an object of the invention to provide a regenerative air preheater in which the size of the slit is controlled in a simple manner without the disadvantages described above.

Dette opnås ifølge opfindelsen ved, at afstands-30 indretningen omfatter en mod rotorens glatte, aksiale flade anliggende, fra radialtætningen fremspringende, glidesko af kulstof, og at giideskoens fremspring i forhold til huset er indstilleligt.This is achieved according to the invention in that the spacer device comprises a carbon sliding shoe projecting from the radial seal projecting from the radial seal and that the guide shoe projection relative to the housing is adjustable.

Ved at justere kontravægten således, at glide-35 skoen ligger an mod den glatte aksiale flade ved rotorens periferi og derefter indstille giideskoens frem- DK 168649 B1 2 spring i forhold til huset, kan der fastlægges en ønsket spaltestørrelse. Denne spaltestørrelse vil blive opretholdt, uanset eventuelle ændringer af rotorens geometri som følge af ændrede temperaturer af de gennem 5 rotoren strømmende gasser, så længe kontravægten holder giideskoen mod rotorens glatte aksiale flade.By adjusting the counterweight so that the sliding shoe abuts against the smooth axial surface at the periphery of the rotor and then adjusting the spring of the guide shoe relative to the housing, a desired gap size can be determined. This gap size will be maintained regardless of any changes in the geometry of the rotor as a result of changing temperatures of the gases flowing through the rotor as long as the counterweight holds the guide shoe against the smooth axial surface of the rotor.

Det har ved forsøg overraskende vist sig, at det er muligt at anvende en glidesko fremstillet af kulstof som afstandsholdende element mellem radialtætnin-10 gen og rotoren, uden at der optræder kraftigt slid af giideskoen. Dette skyldes, at kulstoffet i det væsentlige ikke påvirkes af de herskende høje temperaturer, og korrosive gasser. Kulstoffet har samtidig den egenskab, at det virker selvsmørende, således at der opnås 15 lav friktion mellem radialtætningen og rotoren. Det har vist sig, at en del af giideskoens kulstof, efter nogen tids drift, indlejres i rotorens glatte, aksiale flåde, således at friktionen efterhånden stabiliseres på et lavt niveau.Surprisingly, it has been found that it is possible to use a sliding shoe made of carbon as a spacer between the radial seal and the rotor without excessive wear of the guide shoe. This is because carbon is essentially unaffected by the prevailing high temperatures and corrosive gases. At the same time, the carbon has the property of being self-lubricating so that 15 low friction is obtained between the radial seal and the rotor. It has been found that, after some time of operation, some of the carbon of the guide shoe is embedded in the smooth, axial raft of the rotor so that the friction eventually stabilizes at a low level.

20 I en foretrukken udførelses form er giideskoen under drift fastholdt udrejeligt i forhold til rotoren. Herved opnås at giideskoen bedre tilpasser sig den glatte flade på rotoren, hvilket resulterer i formindsket friktion og formindsket slid.In a preferred embodiment, the guide shoe is operably retained in operation relative to the rotor during operation. Hereby, the guide shoe is better adapted to the smooth surface of the rotor, which results in reduced friction and reduced wear.

25 En anden udførelsesform af varmeveksleren ifølge opfindelsen er ejendommelig ved, at kraften, hvormed en glidesko trykkes mod den glatte flade på rotoren er mindre end 50 kg. Den kraft, hvormed giideskoen føres mod rotoren, skal have en størrelse der er tilstrække-30 lig til at sikre, at giideskoen altid holdes i anlæg mod rotoren, uanset de af temperaturvariationerne fremkaldte variationer af rotorens geometri.Another embodiment of the heat exchanger according to the invention is characterized in that the force by which a sliding shoe is pressed against the smooth surface of the rotor is less than 50 kg. The force by which the guide shoe is guided against the rotor must be of a size sufficient to ensure that the guide shoe is always engaged with the rotor, regardless of the variations in temperature of the rotor geometry.

En tredje udførelsesform af den regnerative varmeveksler ifølge opfindelsen er ejendommelig ved, at 35 afstandsindretningen omfatter et hus, der er anbragt på • den fra rotorens aksiale flade vendende side af radial- 3 DK 168649 B1 tætningen, at der i radialtætningen er en åbning, gennem hvilken giideskoen springer frem, at giideskoen er monteret ved den ene ende af en i huset aksialt bevægelig spindel, der ved sin anden ende har et gevind, 5 der er i indgreb med et korresponderende gevind i huset, og at spindlens gevindende er indrettet til indgreb med et indstillingsværktøj og bærer er gevind for en kontramøtrik til fastlåsning af spindlens indstilling.A third embodiment of the regenerative heat exchanger according to the invention is characterized in that the spacer comprises a housing disposed on the radial sealing side facing the rotor of the radial seal, that there is an opening in the radial seal through said guide shoe protruding, said guide shoe being mounted at one end of an axially movable spindle having at its other end a thread 5 engaged with a corresponding thread in the housing and said threaded spindle being adapted to engage with an adjusting tool and support is threaded for a counter nut to lock the spindle setting.

10 I denne udførelsesform sker indstillingen af spalteåbningen manuelt ved, at spindlen med giideskoen skrues mere eller mindre frem mod rotorens glatte ak-siale flade, hvorefter spindlen fastlåses med en kontramøtrik. Det vil herefter normalt kun være nødven-15 digt, efter længere tids drift, at foretage en manuel efterjustering på grund af slid af giideskoen. Behovet for elektriske eller elektromagnetiske' styreindretninger, kabler, signalgivere etc. bortfalder derfor helt, hvilket resulterer i lavere fremstillings- og vedlige-20 holdelsesomkostninger for luftforvarmeren.In this embodiment the adjustment of the slot opening is done manually by screwing the spindle with the guide shoe more or less towards the smooth axial surface of the rotor, after which the spindle is locked with a counter nut. After this, it will usually only be necessary, after a long period of operation, to make a manual re-adjustment due to wear of the guide shoe. Therefore, the need for electrical or electromagnetic control devices, cables, signal transmitters, etc. completely fails, resulting in lower manufacturing and maintenance costs for the air preheater.

Opfindelsen vil nu blive nærmere forklaret ved hjælp af en udførelsesform og med henvisning til tegningen, på hvilken, fig. 1 er et noget skematiseret snit i et plan 25 parallelt med rotoraksen i en regenerativ varmeveksler ifølge opfindelsen fig. 2 et planbillede af arrangementet vist i fig. 1, og fig. 3 et detaljeret snit i afstandsindretningen 30 vist i fig. 1 og 2.The invention will now be further explained by way of an embodiment and with reference to the drawing, in which: FIG. 1 is a somewhat schematic section of a plane 25 parallel to the rotor axis of a regenerative heat exchanger according to the invention; FIG. 2 is a plan view of the arrangement shown in FIG. 1, and FIG. 3 shows a detailed section of the spacer 30 shown in FIG. 1 and 2.

Fig. 1 viser en varmevekslermatrix 1, der er udformet som en rotor. Af hensyn til overskueligheden er kun områderne ved rotorens endeflader vist. Ud for den på tegningen øvre endeflade af rotoren er placeret en 35 radialtætning 2, der ved midten er understøttet på ik-• ke nærmere detaljeret måde og ved hver ende hviler på 4 DK 168649 B1 en støttearm 3, der indgriber i en slids 4 i radialtætningen 2's ende. Støttearmen 3 er fastgjort til en vandret aksel 5, der er monteret på en bærende bjælke 6, der indgår som en del af varmevekslerens bæ-5 rende konstruktion, og som på ikke nærmere vist måde også bærer rotorens øverste leje.FIG. 1 shows a heat exchanger matrix 1 designed as a rotor. For the sake of clarity, only the areas at the end surfaces of the rotor are shown. Next to the upper end surface of the rotor in the drawing is placed a radial seal 2 which is supported in the middle in no more detailed manner and at each end rests on 4 DK 168649 B1 a support arm 3 which engages in a slot 4 in the end of the radial seal 2. The support arm 3 is attached to a horizontal shaft 5 mounted on a supporting beam 6, which is part of the supporting structure of the heat exchanger 5, and which in no way shows also the upper bearing of the rotor.

Støttearmen 3 er koblet til en stang 7, i hvilken der er indskudt en vantskrue 8 således at stangen 7's længde kan justeres. Stangen 7’s øverste 10 ende er hængslet til den ene ende af en vippearm 9, hvis anden ende bærer en kontravægt 10. Vippearmen 9 vipper om en aksel 11, der er lejret i lejebukke 12.The support arm 3 is coupled to a rod 7 into which a watertight screw 8 is inserted so that the length of the rod 7 can be adjusted. The top 10 end of the rod 7 is hinged to one end of a rocker arm 9, the other end of which carries a counterweight 10. The rocker arm 9 flips about a shaft 11 mounted in bearing blocks 12.

Ved rotorens nedre endeflade findes et lignende arrangement, nemlig en radialtætning 15, hvis ende bæ-15 res af en støttearm 16, som er i indgreb med en slids 17 i radialtætningen 15 og som kan svinge om en aksel 18. Støttearmen 16 er koblet til den nedersté ende af en stang 20, hvis længde kan indstilles på samme måde som beskrevet for stangen 7. Stangen 20 20 er ved sin øver s te ende koblet til den ene ende af en vægtstang 22, hvis anden ende bærer en kontravægt 23. Vægtstangen 22 vipper om en aksel 11, der bæres af lej ebukke 12.At the lower end surface of the rotor there is a similar arrangement, namely a radial seal 15, the end of which is supported by a support arm 16 which engages a slot 17 in the radial seal 15 and which can pivot about a shaft 18. The support arm 16 is coupled to the lower end of a bar 20, the length of which can be adjusted in the same manner as described for the bar 7. The bar 20 is at its upper end coupled to one end of a bar 22, the other end of which carries a counterweight 23. The bar 22 flips an axle 11 carried by bearing ebooks 12.

Hver radialtætning bærer ved sine frie ender en 25 afstandsindretning 24, der nu vil blive nærmere beskrevet med henvisning til fig. 3.Each radial seal carries at its free ends a spacer 24, which will now be further described with reference to FIG. Third

Afstandsindretningen 24 omfatter et rørformet hus 25, der ved sin ene ende har en flange 26, der ved hjælp af tappe 27 er fastgjort til den fra roto-30 ren 1 vendende side af radial tætningen 2. I huset 25 er placeret en forskydelig spindel 28, der ved sin ene ende bærer et gevind 29, der indgriber med tilsvarende gevind i huset 25. Spindlen har ved sin frie ende en tap 30 med flader for en nøgle.The spacer 24 comprises a tubular housing 25 having at one end a flange 26 which is secured by means of pin 27 to the side of the radial seal 2 facing away from the rotor 30 in the housing 25 is provided with a displaceable spindle 28. carrying at one end a thread 29 which engages with corresponding threads in the housing 25. The spindle has at its free end a pin 30 with faces for a key.

35 Spindlens anden ende bærer en bundplade 32, • hvori en glidesko 33 af kulstof er fastholdt udreje-The other end of the spindle carries a base plate 32, wherein a sliding shoe 33 of carbon is retained

Claims (4)

1. Regenerativ varmeveksler omfattende en som en 25 rotor udformet varmevekslermatrix (1), der ved hver ende har en glat, aksial flade (13) ved periferien, og ved hver ende en radialtætning (2; 15), der af en kontravægt (10, 23) via en lænkeledsforbindelse (7, 20) holdes mod rotoren, samt en afstandsindretning (24) til 30 styring af aksialafstanden mellem radialtætningen og rotoren, kendetegnet ved, at afstandsindretningen omfatter en mod rotorens glatte, aksiale flade anliggende, fra radialtætningen fremspringende, glidesko (33) af kulstof, og at giideskoens fremspring 35 i forhold til huset er indstilleligt.A regenerative heat exchanger comprising a heat exchanger matrix (1), formed at each end having a smooth, axial surface (13) at the periphery, and at each end a radial seal (2; 15) of a counterweight (10). , 23) is held against the rotor via a link joint (7, 20) and a spacer (24) for controlling the axial distance between the radial seal and the rotor, characterized in that the spacer comprises a projection of the radial seal projecting against the smooth, axial surface of the rotor. carbon sliding shoe (33), and the guide shoe projection 35 relative to the housing is adjustable. 2. Regenerativ varmeveksler ifølge krav 1, kendetegnet ved, at giideskoen (33) under drift er fastholdt udrejeligt i forhold til rotoren. 6 DK 168649 B1The regenerative heat exchanger according to claim 1, characterized in that the guide shoe (33) is operably retained in operation relative to the rotor during operation. 6 DK 168649 B1 3. Regenerativ varmeveksler ifølge krav 1 eller 2, kendetegnet ved, at kraften, hvormed en glidesko (33) trykkes mod den glatte flade (13) på rotoren (1) er mindre end 50 kg. 5Regenerative heat exchanger according to claim 1 or 2, characterized in that the force by which a sliding shoe (33) is pressed against the smooth surface (13) of the rotor (1) is less than 50 kg. 5 4. Regenerativ varmeveksler ifølge ethvert af de foregående krav, kendetegnet ved, at afstand s ind retningen (24) omfatter et hus (25), der er anbragt på den fra rotorens (1) aksiale flade (13) vendende side af radialtætningen (2; 15), at der i radial-10 tætningen er en åbning, gennem hvilken giideskoen (33) springer frem, at giideskoen er monteret ved den ene ende af en i huset aksialt bevægelig spindel (28), der ved sin anden ende har et gevind (29), der er i indgreb med et korresponderende gevind i huset, og at spindlens 15 gevindende er indrettet til indgreb med et indstillingsværktøj og bærer et gevind for en kontramøtrik (31) til fastlåsning af spindlens indstilling.Regenerative heat exchanger according to any one of the preceding claims, characterized in that the distance in the direction (24) comprises a housing (25) arranged on the side of the radial seal (2) facing from the axial surface (13) of the rotor (1). 15) that in the radial seal there is an opening through which the guide shoe (33) protrudes, that the guide shoe is mounted at one end of an axially movable spindle (28) having at its other end a threads (29) which engage a corresponding thread in the housing and that the threads of the spindle 15 are adapted to engage with a setting tool and carry a thread for a counter nut (31) for locking the spindle setting.
DK089292A 1992-07-07 1992-07-07 Regenerative heat exchanger DK168649B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK089292A DK168649B1 (en) 1992-07-07 1992-07-07 Regenerative heat exchanger
PL93302676A PL171829B1 (en) 1992-07-07 1993-07-06 Regenerative heat exchanger
PCT/DK1993/000228 WO1994001730A1 (en) 1992-07-07 1993-07-06 Regenerative heat exchanger
AT93914650T ATE131280T1 (en) 1992-07-07 1993-07-06 REGENERATIVE HEAT EXCHANGER.
EP93914650A EP0601167B1 (en) 1992-07-07 1993-07-06 Regenerative heat exchanger
ES93914650T ES2080623T3 (en) 1992-07-07 1993-07-06 REGENERATIVE HEAT EXCHANGER.
DE69300967T DE69300967T2 (en) 1992-07-07 1993-07-06 REGENERATIVE HEAT EXCHANGER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK089292A DK168649B1 (en) 1992-07-07 1992-07-07 Regenerative heat exchanger
DK89292 1992-07-07

Publications (3)

Publication Number Publication Date
DK89292D0 DK89292D0 (en) 1992-07-07
DK89292A DK89292A (en) 1994-01-08
DK168649B1 true DK168649B1 (en) 1994-05-09

Family

ID=8098719

Family Applications (1)

Application Number Title Priority Date Filing Date
DK089292A DK168649B1 (en) 1992-07-07 1992-07-07 Regenerative heat exchanger

Country Status (7)

Country Link
EP (1) EP0601167B1 (en)
AT (1) ATE131280T1 (en)
DE (1) DE69300967T2 (en)
DK (1) DK168649B1 (en)
ES (1) ES2080623T3 (en)
PL (1) PL171829B1 (en)
WO (1) WO1994001730A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE504008C2 (en) * 1995-02-10 1996-10-14 Ljungstroem Technology Ab Rotary, regenerative heat exchanger where the clearance between sector plate and rotor is maintained with the help of a gas cushion, and ways to operate such a heat exchanger
SE503962C2 (en) * 1995-02-10 1996-10-07 Ljungstroem Technology Ab Regenerative heat exchanger and a way to operate a regenerative heat exchanger
SE504019C2 (en) * 1995-02-24 1996-10-21 Ljungstroem Technology Ab Rotating regenerative heat exchanger and ways to control such a heat exchanger
SE504462C2 (en) * 1995-06-08 1997-02-17 Ljungstroem Technology Ab Regenerative, rotary heat exchanger with control that prevents drag of slip shoe
US5845700A (en) * 1996-10-31 1998-12-08 Ljungstrom Technology Ab Rotary regenerative heat exchanger

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL95726C (en) * 1956-02-27
DE1035843B (en) * 1956-04-12 1958-08-07 Kraftanlagen Ag Circumferential regenerative preheater with movable sector plates and roller bodies
DE1133850B (en) * 1961-02-21 1962-07-26 Kraftanlagen Ag Adjustment device for the sector plates with circulating regenerative preheaters
US3246686A (en) * 1962-03-05 1966-04-19 Svenska Rotor Maskiner Ab Regenerative preheater including heat transfer mass and floating sealing plates
JPS4987548U (en) * 1972-11-20 1974-07-30
US4024907A (en) * 1976-01-08 1977-05-24 The Air Preheater Company, Inc. Sealing plate support

Also Published As

Publication number Publication date
DK89292A (en) 1994-01-08
PL171829B1 (en) 1997-06-30
DE69300967T2 (en) 1996-08-29
EP0601167A1 (en) 1994-06-15
PL302676A1 (en) 1994-08-08
DE69300967D1 (en) 1996-01-18
ATE131280T1 (en) 1995-12-15
DK89292D0 (en) 1992-07-07
WO1994001730A1 (en) 1994-01-20
EP0601167B1 (en) 1995-12-06
ES2080623T3 (en) 1996-02-01

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