DK174079B1 - Method of Removing a Broken Stag Bolt from a Large Two-Stroke Cross-Head Motor and Such a Motor - Google Patents
Method of Removing a Broken Stag Bolt from a Large Two-Stroke Cross-Head Motor and Such a Motor Download PDFInfo
- Publication number
- DK174079B1 DK174079B1 DK199500656A DK65695A DK174079B1 DK 174079 B1 DK174079 B1 DK 174079B1 DK 199500656 A DK199500656 A DK 199500656A DK 65695 A DK65695 A DK 65695A DK 174079 B1 DK174079 B1 DK 174079B1
- Authority
- DK
- Denmark
- Prior art keywords
- bottom frame
- bolt
- piece
- stud
- stag
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000005520 cutting process Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M1/00—Frames or casings of engines, machines or apparatus; Frames serving as machinery beds
- F16M1/08—Frames or casings of engines, machines or apparatus; Frames serving as machinery beds characterised by being built-up of sheet material or welded parts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
i DK 174079 B1in DK 174079 B1
Opfindelsen angår en fremgangsmåde til udtagning af en knækket stagbolt fra en stor totakts krydshoved-motor, der har en bundramme med tværgående vægge, hvori hovedlejenes underparter er integreret, samt et motor-5 stativ med stagbolterør med en længde fra 1,5 til 5 meter, og hvor bundrammen, motorstativet og et cylinderparti eller -partier er fikseret til hinanden ved hjælp af stagbolte, der hver fra det tilhørende cylinderparti passerer ned gennem stagbolterøret i motorstativet og 10 er fikseret i bundrammens øvre parti i højere niveau end hovedlejehusenes underparter, hvorved bundrammen i området omkring hovedlejerne er i det væsentlige upåvirket af sammenspændingskræfterne fra stagboltene.BACKGROUND OF THE INVENTION The invention relates to a method for removing a broken stag bolt from a large two-stroke cross-head motor having a bottom frame with transverse walls into which the main bearing subparts are integrated, as well as a motor stand with stag bolt pipes having a length of 1.5 to 5 meters. and wherein the bottom frame, engine rack and a cylinder portion or portions are fixed to each other by means of stud bolts, each passing from the associated cylinder portion down through the stud bolts in the engine rack and fixed in the upper portion of the bottom frame at a higher level than the lower parts of the main bearing housings, in the area around the main bearings is substantially unaffected by the compressive forces of the stud bolts.
En sådan krydshovedmotor af nævnte art kendes fra 15 W094/12784, der beskriver fordelene ved at fiksere stagboltene i bundrammens øvre parti, navnlig at bundrammen i området omkring hovedlejerne er stort set upåvirket af sammenspændingskræfterne fra stagboltene, hvilket ikke er tilfældet i de sædvanligt udformede 2 0 krydshovedmotorer, hvor stagboltene går hele vejen gennem bundrammen og trækker opad i dennes underside.Such a cross-head motor of the kind is known from WO94 / 12784, which describes the advantages of fixing the stag bolts in the upper part of the bottom frame, in particular that the bottom frame in the area around the main bearings is largely unaffected by the compressive forces of the stag bolts, which is not the case in the usual designs. 0 cross-head motors, with the stag bolts passing all the way through the bottom frame and pulling upwards in the underside thereof.
Motorudformningen anvist i W094/12784 indebærer visse ulemper, som ikke er kendte fra de sædvanligt udformede motorer. I tilfælde af, at en stagbolt skulle 25 knække, vil det nederste af knækkede stykke af stagbolten sidde fikseret i bundrammens øvre parti ved bunden af det lange stagbolterør i motorstativet. For at udtage det afknækkede stykke må motorstativet løsnes fra bundrammen og løftes såpas langt op, at det afknækkede 30 stykke kan frigøres og fjernes, hvorefter motoren igen skal samles, så en ny stagbolt kan isættes. Dette er overordentligt arbejdskrævende, og selv om en stagbolt er dimensioneret med en sådan sikkerhedmargen mod brud, at knækning af en stagbolt er nærmest usandsynlig, kan 35 den blotte risiko for, at det kan ske, være tilstrække- 2 DK 174079 B1 ligt til, at de fleste motorkøbere vil foretrække den traditionelle motorudformning med gennemgående stagbolte.The engine design disclosed in W094 / 12784 involves certain disadvantages which are not known from the customary designed motors. In the event that a stag bolt should break, the bottom of the broken piece of the stag bolt will sit fixed in the upper portion of the bottom frame at the bottom of the long stag bolt in the engine rack. To remove the broken piece, the motor stand must be detached from the bottom frame and lifted so far up that the broken 30 piece can be released and removed, after which the motor must be assembled again so that a new stud bolt can be inserted. This is extremely labor intensive, and although a stag bolt is dimensioned with such a safety margin against breakage that cracking of a stag bolt is almost unlikely, the mere risk of it happening may be sufficient, that most motor buyers will prefer the traditional motor design with continuous stud bolts.
Den foreliggende opfindelse har til formål at 5 afhjælpe de ovennævnte ulemper ved at fiksere stagboltene i bundrammens øvre parti.The present invention has for its object to alleviate the aforementioned disadvantages of fixing the stud bolts in the upper portion of the bottom frame.
Med henblik herpå er fremgangsmåden ifølge opfindelsen ejendommelig ved, at den knækkede stagbolt fjernes uden at motorstativet adskilles fra bundrammen 10 ved at det øvre stykke af den knækkede stagbolt løftes op af cylinderpartiet, at adgang for håndtering af det nederste afknækkede stykke af stagbolten opnås gennem en åbning til den nedre ende af stagbolterøret, og at det afknækkede stykke udtages gennem adgangsåbningen, 15 om nødvendigt efter at være opdelt i mindre stykker, eller løftes op gennem stagbolterøret efter frigørelse af det afknækkede stykke ved hjælp af værktøj indført gennem adgangsåbningen.To this end, the method according to the invention is characterized in that the broken stud bolt is removed without separating the motor frame from the bottom frame 10 by lifting the upper piece of the broken stud bolt up by the cylinder part, that access for handling the lower broken piece of the stud bolt is obtained through a opening to the lower end of the stud bolt tube, and removing the broken piece through the access opening, if necessary after being divided into smaller pieces, or being lifted up through the stud bolt tube after release of the broken piece by means of tools inserted through the access opening.
En stagbolt skal have stor længde i forhold til 20 diameteren for at have de krævede elastiske egenskaber.A stud bolt must be of great length relative to the diameter of 20 to have the required elastic properties.
Da en bolt oftest knækker i gevindområdet, betyder det store længde/diameter-forhold, at det afknækkede stykke vil være relativt kort og ligge i bunden af et ofte særdeles langt og snævert stagbolterør. Opfindelsens 25 grundlæggende idé er, at det nedre af knækkede stykke af stagbolten fjernes fra bunden af stagbolterøret, uden at motorstativet adskilles fra blindrammen. Gennem åbningen til den nedre ende af slagbolterøret kan det knækkede stykke håndteres, eksempelvis for friskruning 30 af stykket, hvis stagbolten er fikseret ved indskruning i et opad åbent gevindhul, og/eller for opskæring i mindre stykker ved hjælp af passende værktøj, såsom en vinkelsliber. Stykket eller de opdelte stykker kan udtages gennem åbningen eller løftes op gennem stag-35 bolterøret. Uanset den i afhængighed af den aktuelle 3 DK 174079 B1 motorudformning valgte udtagningsmåde giver åbningen mulighed for udtagning af det afknækkede stykke, uden at stativet skal løsnes fra bundrammen.Since a bolt most often breaks in the threaded area, the large length / diameter ratio means that the cracked piece will be relatively short and lie at the bottom of an often extremely long and narrow stag bolt. The basic idea of the invention is that the bottom of the broken piece of the stud bolt is removed from the bottom of the stud bolt tube without separating the motor stand from the blind frame. Through the opening to the lower end of the impact bolt tube, the broken piece can be handled, for example for free-screwing the piece if the stud bolt is fixed by screwing into an upwardly open threaded hole, and / or for cutting into smaller pieces by suitable tools such as an angle grinder . The piece or divided pieces may be removed through the opening or lifted through the stud bolt tube. Regardless of the removal method chosen in accordance with the current 3 DK 174079 B1 engine design, the opening allows for removal of the broken piece without having to detach the frame from the bottom frame.
Åbningen kan være den eneste eller en supplerende 5 åbning. I de tilfælde, hvor bundrammen ved bygningen af motoren ikke er fremstillet med en passende åbning, kan en sådan tilvejebringes ved at lave hul i stagbolterøret ved dettes nedre ende. Dette er ganske vist et destruktivt indgreb i et væsentligt element i motorstativet, 10 men det er muligt at genopbygge stagbolterøret på styrkemæssig forsvarlig vis, når stagbolten er udskiftet, ved hjælp af velkendte og sædvanlige processer, såsom isvejsning af et materialestykke. Åbningen kan laves ud for det afknækkede stykke, hvis den skal give 15 adgang for et værktøj til fiksering af et løfteværktøj til det afknækkede stykke, eller den kan laves et stykke oven over det af knækkede stykke, så værktøjer kan indføres oven fra.The opening may be the only or an additional 5 opening. In cases where the bottom frame of the engine is not constructed with a suitable opening, such can be provided by making holes in the stud bolt tube at its lower end. While this is a destructive engagement with an essential element of the engine rack, it is possible to rebuild the stag bolt tube in a strength-wise manner when the stag bolt is replaced, by well known and customary processes such as ice welding a piece of material. The opening may be made adjacent to the broken piece if it is to allow access to a tool for fixing a lifting tool to the broken piece, or it may be made a piece above that of the broken piece so that tools can be inserted from above.
Gennem åbningen i stagbolterøret kan der eksempel-20 vis indføres en snittap, der anvendes til at skære indvendigt gevind i en langsgående boring i det af-knækkede stykke. Et værktøj med et modsvarende udvendigt gevind kan derefter skrues fast i hullet i det af-knækkede stykke, så dette kan håndteres ved hjælp af 25 værktøjet. Som eksempel på et egnet værktøj kan nævnes et op til 9 meter langt løfteværktøj, som fra oven sænkes ned gennem stagbolterøret og skrues fast i det afknækkede stykke, der derefter løftes op.For example, through the opening in the stud bolt tube, a cut pin may be inserted which is used to cut the internal thread in a longitudinal bore of the broken piece. A tool with a corresponding external thread can then be screwed into the hole in the cut-off piece so that this can be handled by the tool. An example of a suitable tool is a lifting tool up to 9 meters long, which is lowered from above through the stud bolt tube and screwed into the broken piece, which is then lifted.
Hvis stagbolten er skruet fast i et gevindhul ved 30 toppen af bundrammen, kan det af knækkede stykke frigøres fra gevindet ved at et værktøj skrues fast i et gevindhul i det afknækkede stykke, hvorefter værktøjet drejes rundt, indtil stykket er skruet ud af gevindet i bundrammen. Gevindsamlingen mellem værktøjet og stykket 35 kan overføre en stor momentpåvirkning til stykket. Som 4 DK 174079 B1 antydet ovenfor kan værktøjet skrues ovenfra ned i det afknækkede stykke, men det er også muligt, at værktøjet fra bundrammens underside føres op gennem en gennemgående boring og skrues op i gevindhullet i bunden af 5 det afknækkede stykke.If the stud bolt is screwed into a threaded hole at the top of the bottom frame, the broken piece can be released from the thread by screwing a tool into a threaded hole in the broken piece, then rotating the tool until the piece is unscrewed from the thread in the bottom frame. . The thread assembly between the tool and the piece 35 can transfer a large torque effect to the piece. As indicated above, the tool can be screwed down from above into the cracked piece, but it is also possible that the tool from the bottom of the bottom frame is guided through a through bore and screwed into the threaded hole at the bottom of the cracked piece.
Som det fremgår af nedenstående omtale kan der ved udformningen af motoren tages specielle hensyn til den eventuelle fjernelse af et nedre afknækket boltestykke.As will be seen from the discussion below, special consideration may be given to the possible removal of a lower broken bolt piece when designing the engine.
Opfindelsen angår således også en stor totakts 10 krydshovedmotor, der har en bundramme med tværgående vægge, hvori hovedlejenes underparter er integreret, samt et motorstativ med stagbolterør med en længde fra 1,5 til 5 meter, og hvor bundrammen, motorstativet og et cylinderparti eller -partier er fikseret til hinanden 15 ved hjælp af stagbolte, der hver fra det tilhørende cylinderparti passerer ned gennem stagbolterøret i motorstativet og er fikseret i bundrammens øvre parti i højere niveau end hovedlejehusenes underparter, hvorved bundrammen i området omkring hovedlejerne er i 20 det væsentlige upåvirket af sammenspændingskræfterne fra stagboltene, og hvor stagboltens nedre ende er forsynet med udvendigt gevind, der er indskruet i et opad åbent gevindhul i bundrammen.Thus, the invention also relates to a large two-stroke 10 cross-head motor having a bottom frame with transverse walls into which the main bearing subparts are integrated, as well as a motor stand with stagger bolts of 1.5 to 5 meters in length, and wherein the bottom frame, the motor stand and a cylinder part or - portions are fixed to each other 15 by means of stud bolts, each passing from the associated cylinder portion down through the stud bolts in the motor stand and fixed in the upper portion of the bottom frame at a higher level than the subparts of the main bearing housings, the bottom frame of the area around the main bearings being substantially unaffected by the clamping forces from the stud bolts, and wherein the lower end of the stud bolts is provided with an external thread screwed into an upwardly open threaded hole in the bottom frame.
Med henblik på at lette håndteringen af det 25 afknækkede stykke er motoren ejendommelig ved, at hver stagbolt i sin nedre ende har et centralt langsgående hul med en længde, der er større end længden af det udvendige gevind. Et eventuelt afknækket stykke vil således have en central gennemgående boring, der på 30 forholdsvis ukompliceret måde kan forsynes med gevind ved hjælp af en snittap, der er indført gennem et hul i stagbolterøret.In order to facilitate handling of the broken piece, the engine is characterized in that each stud bolt at its lower end has a central longitudinal hole with a length greater than the length of the external thread. Thus, a possibly broken piece will have a central through bore which can be threaded in a relatively uncomplicated manner by means of a cut pin inserted through a hole in the stud bolt tube.
I en yderligere udførelsesform er det centrale langsgående hul i stagbolten forsynet med indvendigt 35 gevind, og bundrammen har et gennemgående hul, der 5 DK 174079 B1 forløber koaksialt med gevindhullet i bundrammen og kan tjene til opsætning af et værktøj i stagboltens langsgående hul for friskruning af et afknækket nedre stagboltestykke. Dette giver den fordel, at adgangs-5 åbning er fremstillet på forhånd.In a further embodiment, the central longitudinal hole in the stud bolt is provided with an internal thread, and the bottom frame has a through hole which extends coaxially with the threaded hole in the bottom frame and can serve to set up a tool in the longitudinal hole of the stud bolt. a cracked lower stag bolt piece. This gives the advantage that access 5 opening is made in advance.
En alternativ udførelsesform er ejendommelig ved, at det opad åbne gevindhul er udformet i et akselstykke, der er krympet, fast i et hul i bundrammens øvre parti, og at stagboltens styrkemæssigt svageste område er 10 beliggende nede i det i akselstykket beliggende stag-bolteafsnit. Hvis stagbolten skulle knække, sker dette i dens svageste område, så det afknækkede stykke ligger indesluttet i akselstykket og kan trækkes ud af bundrammen sammen med dette. Dette kan ske uden at foretage 15 destruktive indgreb i bundramme og motorstativ. Denne udførelsesform giver den yderligere fordel, at bundrammen ikke er svækket af huller til stagboltefikseringen.An alternative embodiment is characterized in that the upwardly open threaded hole is formed in a shaft piece which is shrunk, fixed in a hole in the upper part of the bottom frame, and that the weakest area of the stag bolt is located down in the stag bolt section located in the shaft piece. If the stud bolt should break, this occurs in its weakest area, so that the broken piece is enclosed in the shaft piece and can be pulled out of the bottom frame along with it. This can be done without 15 destructive interventions in the bottom frame and motor stand. This embodiment offers the additional advantage that the bottom frame is not weakened by holes for the stud bolt fixation.
Det ikrympede akselstykke med den iskruede nedre stagbol teende udgør et massivt element, der bevarer bundram-20 mens stivhed i området omkring stagboltefikseringen.The crimped shaft piece with the ice-bolted lower stud bolt end constitutes a solid element that retains the bottom frame rigidity in the region of the stud bolt fixation.
Som alternativ til at skrue stagbolten fast i et opad åbent gevindhul i bundrammen kan stagboltens gevind være iskruet i en møtrik, der ligger an mod en ned-advendende anlægsflade i bundrammens øvre parti. Denne 25 udførelsesform er ifølge opfindelsen ejendommelig ved, at der i bundrammen under møtrikken er et frirum med en sådan udstrækning i stagboltens længderetning, at et nedre afknækket stagboltestykke kan falde længere end en stagbolteradius nedad. Såfremt stagbolten skulle 30 knække ved gevindet i møtrikken kan det nedfaldne boltestykke med møtrikken udtages gennem en sidevendt åbning i bundrammen. Hvis stagbolten knækker højere oppe, falder det afknækkede stykke såpas langt ned i frirummet, at et over møtrikken beliggende boltestykke 35 blotlægges tilstrækkeligt til, at der er adgang til at 6 DK 174079 B1 overskære stagbolten højere oppe end møtrikken, hvorefter de afknækkede, opdelte dele kan udtages.As an alternative to screwing the stud bolt into an upwardly open threaded hole in the bottom frame, the thread of the stud bolt may be screwed in a nut which abuts a downward-facing abutment surface in the upper portion of the bottom frame. According to the invention, this embodiment is characterized in that in the bottom frame below the nut there is a clearance with such an extension in the longitudinal direction of the stag bolt that a lower broken stag bolt can fall further than a stag bolt radius downwards. If the stud bolt should break at the thread in the nut, the fallen bolt piece with the nut can be removed through a lateral opening in the bottom frame. If the stud bolt breaks higher up, the cracked piece falls so far down into the clearance that a bolt piece 35 located above the nut is exposed sufficiently that it is possible to cut the stud bolt higher up than the nut, after which the broken apart parts can be taken out.
I en yderligere udførelsesform er frirummet under møtrikken et hul, der er koaksialt med stagbolterøret, 5 strækker sig fra bundrammens underside op til den nedadvendende anlægsflade og har så stort tværsnit, at møtrikken kan passere gennem hullet, og et aftageligt spærreorgan hindrer et nedre afknækket stagboltestykke i utilsigtet at falde ned i bunden af krumtaphuset.In a further embodiment, the clearance space beneath the nut is a hole coaxial with the stud bolt tube 5 extending from the bottom of the bottom frame up to the downwardly facing abutment surface and of such a large cross-section that the nut can pass through the hole and a removable locking member prevents a lower broken stud bolt piece. inadvertently dropping to the bottom of the crankcase.
10 Åbningen tilvejebringes her ved at fjerne det aftagelige spærreorgan.The aperture is provided here by removing the removable locking means.
Opfindelsen forklares herefter nærmere med henvisning til den skematiske tegning, hvor fig. 1 viser et tværsnit gennem den ene halvdel af 15 de stationære hovedelementer omkring en stagbolt i en stor krydshovedmotor, fig. 2 i større skala gevindskæring i et afknækket stagboltestykke i motoren i fig. 1, fig. 3 illustrerer frigørelse og opløftning af et 20 afknækket stagboltestykke i en anden udførelsesform for motoren, og fig. 4-6 illustrerer fikseringen af stagbolten i en tredie, fjerde og femte udføreIsesform for motoren.The invention will now be explained in more detail with reference to the schematic drawing, in which fig. 1 shows a cross section through one half of the stationary main elements about a stag bolt in a large cross-head motor; FIG. 2 on a larger scale thread cutting in a disengaged stud bolt piece in the motor of FIG. 1, FIG. 3 illustrates the release and lifting of a disengaged stud bolt in another embodiment of the engine; and FIG. 4-6 illustrate the fixing of the stud bolt in a third, fourth and fifth embodiment of the engine.
1 fig. 1 ses den ene halvdel af en bundramme l, der 25 på sin overside er påmonteret et motorstativ 2, og et cylinderparti 3 til en stor totakts krydshovedmotor, såsom en fremdrivningsmotor i et skib eller en stationær kraftproducerende motor, der kan have en effekt på fx fra 2000 til 75000 kW. De tre hovedelementer 1, 2 og 3 30 er symmetriske om motorens langsgående symmetriplan 4.1 FIG. 1, one half of a bottom frame 1, 25 on which is mounted on its upper side an engine rack 2, and a cylinder part 3 for a large two-stroke cross-head motor, such as a propulsion engine in a ship or a stationary power producing engine, may have an effect on e.g. from 2000 to 75000 kW. The three main elements 1, 2 and 3 are symmetrical about the longitudinal plane of symmetry of the motor 4.
En ikke vist cylinder foring kan på tradionel måde monteres i cylinderpartiet, hvorefter plej Istang, krydshoved, stempelstang og stempel kan monteres, og cylinderdækslet kan spændes fast ved hjælp af dæk-35 seltappe, der er skruet fast i toppen af cylinderparti- 7 DK 174079 B1 et. Da disse elementer er særdeles velkendte og i og for sig opfindelsen uvedkommende er de for overskueligheds skyld ikke vist på tegningen.A cylindrical casing not shown can be installed in the traditional part in the cylinder part, after which care Rod, cross head, piston rod and piston can be mounted, and the cylinder cover can be clamped by means of cover pins screwed into the top of the cylinder part 7 DK 174079 B1 et. Since these elements are very well known and in themselves irrelevant to the invention, they are not shown in the drawing for clarity.
Mellem cylindrene er motorstativet afstivet af 5 tværafstivninger 5, der kan være enkeltlags pladevægge eller dobbeltvæggede rammeprofiler. Tværafstivningerne bærer styrene 6 for krydshovederne. Styrene er på deres udadvendende bagsider forsynet med afstivning, der fører tværkræfterne fra krydshovederne over i tværafstiv-10 ningerne 5. Krydshovedstyrene 6 ender højere oppe end motorstativets bundflange 7, så der over et hovedleje 8 er et frirum med god plads til håndtering af lejehusets overpart 9, der kan løftes op og fri af lejetappe 10.Between the cylinders, the engine rack is supported by 5 cross stiffeners 5, which may be single-layer plate walls or double-walled frame profiles. The cross stiffeners carry the guides 6 for the cross heads. The guides are provided on their outward facing rear with bracing which transfers the forces from the cross heads into the cross braces 5. The cross head guides 6 end up higher than the bottom flange 7 of the motor stand, so that over a main bearing 8 there is a clearance space for handling the upper part of the bearing housing. 9, which can be lifted up and free of bearing pins 10.
15 I bundrammen 1 er der under tværafstivningerne 5 tværgående vægge 11. Hovedlejehusets underpart 12 er udformet ud i et med væggen li. Hovedlejets integrering i væggen 11 er opefter afsluttet i niveau med overpartens anlæg mod underparten 12. Ved fremstillingen af 20 bundrammen udbores hovedlejerne på mål i en fælles boreoperation. For at opnå bedst mulig opretning i motoren er det derfor ønskeligt, at bundrammen ved motorens samling deformeres så lidt som muligt i området omkring underparten 12. For at friholde bundrammen fra 25 deformationer fremkaldt ved sammenspændingen af bundramme, motorstativ og cylinderparti sker sammenspændingen ved hjælp af stagbolte 13, der er fikserede i toppen af bundrammen. Stagboltenes forløb er tydeliggjort på tegningen ved indlæggelse af et delsnit langs stag-30 boltens længdeakse.15 In the bottom frame 1, there are transverse walls 11 under the cross braces 5. The lower part 12 of the main bearing housing is formed integrally with the wall 1i. The main bearing's integration into the wall 11 is subsequently completed at the level of the upper part's abutment against the lower part 12. In the manufacture of the 20 bottom frame, the main bearings are drilled on targets in a joint drilling operation. Therefore, in order to obtain the best possible alignment in the engine, it is desirable that the bottom frame of the motor assembly is deformed as little as possible in the area around the subpart 12. In order to keep the bottom frame from 25 deformations caused by the tensioning of the bottom frame, motor stand and cylinder part, the tensioning is done by means of stud bolts 13 fixed at the top of the bottom frame. The course of the stud bolts is illustrated in the drawing by inserting a partial section along the longitudinal axis of the stud bolt.
Stagbolten 13 passerer gennem et hul i cylinderpartiet 3 og videre ned gennem et stagbolterør 14 i motorstativet. Stagboltens nedre ende 15 er skruet fast i et opad åbent gevindhul i bundrammen. Stagboltens øvre 35 ende er forsynet med gevind, og en møtrik 17 er påskruet 8 DK 174079 B1 gevindet og er spændt ned mod oversiden af cylinderpartiet under samtidig elastisk forlængelse af stagbolten.The stud bolt 13 passes through a hole in the cylinder portion 3 and further down through a stud bolt tube 14 in the engine rack. The lower end 15 of the stud bolt is screwed into an upwardly open threaded hole in the bottom frame. The upper end of the stud bolt is threaded and a nut 17 is threaded 8 and is tightened down towards the upper side of the cylinder portion while simultaneously elongating the stud bolt.
I den viste udførelsesform er stagbolten todelt og samlet i en bøsning 16 med indvendigt gevind. Bøsningen 5 ligger an mod indersiden af hullet i cylinderpartiet og støtter stagbolten i tværretningen. Denne udformning er navnlig fordelagtig ved de store motorer, hvor stagbolten kan være op mod 9 meter lang. Det er også muligt at lave stagbolten i et stykke.In the illustrated embodiment, the stud bolt is bifurcated and assembled in an internal threaded sleeve 16. The bushing 5 abuts the inside of the hole in the cylinder portion and supports the rod bolt in the transverse direction. This design is particularly advantageous for the large motors where the stud bolt can be up to 9 meters long. It is also possible to make the stud bolt in one piece.
10 Afhængigt af motorstørrelsen kan stagbolten være fra 3 til op mod 9 meter lang, og stagbolterøret 14, der strækker sig fra topflangen til bundflangen på motorstativet, kan være fra 1,5 til op mod 5 meter lang.Depending on the engine size, the stud bolt may be from 3 to up to 9 feet long, and the stud bolt tube 14 extending from the top flange to the bottom flange of the engine rack may be from 1.5 to 5 feet long.
Hvis stagbolten knækker, vil det nedre afknækkede 15 stykke 13b som vist i fig. 2 sidde fast i gevindhullet i bundrammen l, mens det øvre stykke 13a af stagbolten er løst, så det kan løftes op af cylinderpartiet. For at frigøre stykket 13b skæres der hul i stagbolterøret 14, så der fremkommer en åbning 18, der som vist kan 20 vende ind mod frirummet over hovedlejet eller kan vende i motorens længderetning, hvis krydshovedstyrene går så langt ned, at der ikke er tilstrækkelig plads over hovedlejet.If the stud bolt breaks, the lower broken piece 15b as shown in FIG. 2 is secured to the threaded hole in the bottom frame 1 while the upper piece 13a of the stud bolt is loosened so that it can be lifted up by the cylinder portion. To release the piece 13b, holes in the stud bolt tube 14 are cut to form an opening 18 which, as shown, can face toward the clearance above the main bearing or can turn in the longitudinal direction of the motor if the cross head guides go so far that there is insufficient space above the main bed.
Stagbolten har i sin nedre ende en central langs-25 gående boring 19, der går længere op i stagbolten end den øvre afslutning 20 af det udvendige gevind. I det afknækkede stykke 13b er boringen gennemgående. En snittap 21 indføres gennem åbningen 18 og anvendes til at skære indvendigt gevind i boringen 19. Gevindet 30 skæres hensigtsmæssigt med en stigning, der er modsat af stigningen af stagboltens udvendige gevind, og gevindet skæres kun i et øvre afsnit af stykket 13b.The stud bolt has at its lower end a central longitudinal bore 19 extending further into the stud bolt than the upper end 20 of the external thread. In the broken piece 13b, the bore is continuous. A cut pin 21 is inserted through the aperture 18 and is used to cut the internal thread in the bore 19. The thread 30 is conveniently cut with a pitch opposite to the pitch of the outer thread of the stud bolt and the thread is only cut in an upper portion of the piece 13b.
Derefter fjernes snittappen, og et værktøj skrues i bund i det fremstillede gevind, hvorefter værktøjet ved 35 fortsat drejning i indskruningsretningen påvirker 9 DK 174079 B1 stykket 13b med et drejningsmoment, der drejer stykket op af gevindhullet i bundrammen. Værktøjet kan være en stang med udvendigt gevind ved sin nedre ende og et udragende håndtag i sin øvre ende. Værktøjet kan også 5 have en krave med en nedadvendende anlægsflade, der kan ligge an mod toppen af stykket 13b og hindre fortsat iskruning i stykkets indvendige gevind. I dette tilfælde skal gevindet i boringen 19 blot skæres i større længde end værktøjets gevindstykke under kraven.Then, the cutter pin is removed and a tool is screwed into the manufactured thread, after which the tool, upon continued turning in the screwing direction, affects the piece 13b with a torque which turns the piece out of the threaded hole in the bottom frame. The tool may be an external threaded rod at its lower end and a projecting handle at its upper end. The tool may also have a collar with a downwardly facing abutment surface which may abut against the top of the piece 13b and prevent continued ice screwing into the internal threads of the piece. In this case, the thread in the bore 19 simply needs to be cut to a greater length than the tool thread under the collar.
10 Hvis åbningen 18 er tilstrækkelig stor kan det frigjorte stykke 13b udtages herigennem. Alternativt kan en løfteindretning sænkes ned gennem cylinderpartiet og stagbolterøret og anvendes til opløftning af stykket 13b, som det beskrives i forbindelse med fig. 3.If the opening 18 is sufficiently large, the released piece 13b can be removed therethrough. Alternatively, a lifting device may be lowered through the cylinder portion and the stud bolt tube and used to lift the piece 13b as described in connection with FIG. Third
15 I den efterfølgende beskrivelse af andre udførel sesformer anvendes for nemheds skyld samme henvisningstal som ovenfor for elementer af samme art.In the following description of other embodiments, the same reference numerals as above apply to elements of the same kind for convenience.
I fig, 3 ses en anden udførelsesform for motoren, hvor den tværgående væg 11 i bundrammen er udført med 20 et gennemgående hul 22, der forløber koaksialt med stagbolterøret og med gevindhullet i bundrammens øvre parti. Hullet 22 kan være støbt eller kan være boret i den støbte tværvæg. I sit nederste afsnit har hullet 22 større diameter for at lette adgangen til opsætning af 25 et værktøj . Under bundrammen 1 er der et oliekar 23, der begrænser frihøjden under hullet 22. Værktøjet til løsnelse af det nedre stagboltestykke 13b omfatter et første stykke 24, der i sin øvre ende har udvendigt gevind, der kan skrues op i et præfabrikeret indvendigt 30 gevind i den nedefter åbne boring 19 i stykket 13b.In Fig. 3, another embodiment of the motor is seen, in which the transverse wall 11 in the bottom frame is formed with 20 a through hole 22 extending coaxially with the stud bolt tube and with the threaded hole in the upper part of the bottom frame. The hole 22 may be cast or may be drilled into the molded transverse wall. In its lower section, the hole 22 has a larger diameter to facilitate access to the setup of a tool. Under the bottom frame 1 there is an oil tank 23 which limits the clearance below the hole 22. The tool for loosening the lower stud bolt 13b comprises a first piece 24 which has an upper end at its upper end which can be screwed up into a prefabricated inner 30 thread. it downwardly bores 19 in the piece 13b.
Dette indvendige gevind har modsat stigning af det udvendige gevind på stykket 13b. I bunden af det første stykke er der et gevindhul, der passer sammen med en øvre gevindtap på et forlængerstykke 25, der i sin nedre 35 har et ende tilsvarende gevindhul. Efterhånden som det 10 DK 174079 B1 første stykke føres op gennem hullet 22 påsættes det nødvendige antal forlængerstykker 25, indtil det første stykke er skruet op i boringen 19. Derefter påsættes det nederste forlængerstykke en udragende arm, der anvendes 5 til at påføre værktøjet og dermed det afknækkede stykke 13b et drejningsmoment, så stykket 13b skrues op og fri af gevindboringen i bundrammen.This internal thread has the opposite rise of the external thread on the piece 13b. At the bottom of the first piece, there is a threaded hole that fits together with an upper threaded pin on an extension piece 25, which at its lower 35 has an end corresponding to a threaded hole. As the first piece is brought up through the hole 22, the required number of extension pieces 25 is applied until the first piece is screwed up into the bore 19. Thereafter, the lower extension piece is fitted with a protruding arm which is used 5 to apply the tool and thus the cracked piece 13b has a torque so that the piece 13b is unscrewed and free of the threaded bore in the bottom frame.
Efter frigørelsen skal stykket 13b fjernes fra bunden af stagbolterøret. Dette kan naturligvis ske ved 10 at skære et passende stort hul i stagbolterøret, men det foretrækkes, at stykket løftes op ved hjælp af en løfteindretning 26, der er ført oppefra ned gemmen cylinderpartiet og stagbolterøret. Løfteindretningen fastgøres til det afknækkede stykke 13b. Dette kan ske 15 på flere måder. En mulighed er at løfteindretningen ved sin nedre ende har en nedad åben kop 27 med lidt større indre diameter end stykket 13b's yderdiameter, så koppen kan sænkes ned omkring stykket 13b. Koppen kan indeholde en kraftig klæber, der klæber fast til stykket 13b. Der 20 kan også bores et forholdsvis lille hul 28 i den nedre ende af stagbolterøret, så der er adgang for en svejseelektrode, der kan svejse kanten af koppen fast til stykket 13b. En tredie mulighed er, at løfteindretningen er en stang, der ved sin nedre ende bærer en beholder 25 med en hurtigthærdende lim. Når løfteindretningen stødes ned mod oversiden af stykket 13b, brydes beholderen, så stangen limes fast til stykket 13b. En fjerde mulighed er, at løfteindretningen omfatter et rørstykke med mindre yderdiameter end inderdiameteren af stagbol-30 terøret, og en løftewire, der ved sin nedre ende bærer en i rørstykket beliggende elektromagnet, der efter at være sænket ned gennem røret og aflagt på toppen af det afknækkede stykke aktiveres ved strømpåsætning, så det afknækkede stykke fikseres magnetisk til elektromagne-35 ter. Rørstykket holder elektromagneten centreret i 11 DK 174079 B1 stagbolterøret, så den ikke sætter sig fast på dette ved strømpåsætningen. Når stykket 13b er fastgjort til løfteindretningen, løftes denne op sammen med stykket, og en ny stagbolt kan isættes.After release, the piece 13b must be removed from the bottom of the stud bolt tube. This can of course be accomplished by cutting a suitably large hole in the stud bolt tube, but it is preferred that the piece be lifted by a lifting device 26 which is led from the top down the storage cylinder portion and the stud bolt tube. The lifting device is attached to the broken piece 13b. This can happen 15 in several ways. One possibility is that the lifting device at its lower end has a downwardly open cup 27 of slightly larger internal diameter than the outer diameter of the piece 13b, so that the cup can be lowered around the piece 13b. The cup may contain a strong adhesive which adheres to the piece 13b. A relatively small hole 28 may also be drilled at the lower end of the stud bolt tube, so that a welding electrode is available which can weld the edge of the cup firmly to the piece 13b. A third possibility is that the lifting device is a rod carrying at its lower end a container 25 with a fast-curing adhesive. When the lifting device is pushed down towards the top of the piece 13b, the container is broken so that the rod is glued to the piece 13b. A fourth possibility is that the lifting device comprises a pipe piece having a smaller outer diameter than the inner diameter of the stag bolt tube, and a lifting wire, which at its lower end carries an electromagnet located in the pipe piece, which after being lowered down through the pipe and deposited on top of the the broken piece is activated by current application so that the broken piece is magnetically fixed to electromagnets. The pipe piece keeps the electromagnet centered in the stud bolt 11 so that it does not get stuck on this during power application. When the piece 13b is attached to the lifting device, it is lifted together with the piece and a new stud bolt can be inserted.
5 I fig. 4 ses en tredie udføre Ise s form for motoren, hvor den tværgående væg 11 i bundrammen i det øvre parti under stagbolterøret har et boret, cylindrisk hul, hvori et akselstykke 29 er ikrympet. Hullet kan være orienteret med længdeaksen i motorens tværretning, men det 10 foretrækkes, at længdeaksen er orienteret i motorens længderetning og forløber vandret, idet dette letter udtrækning af akselstykket fra hullet.5 In FIG. 4, a third embodiment of the engine is shown in the form of the motor, in which the transverse wall 11 in the bottom frame of the upper part under the stud bolt tube has a drilled cylindrical hole in which a shaft piece 29 is shrunk. The hole may be oriented with the longitudinal axis in the transverse direction of the motor, but it is preferred that the longitudinal axis is oriented in the longitudinal direction of the motor and runs horizontally, thereby facilitating extraction of the shaft piece from the hole.
Akselstykket 29 har et gevindhul med indvendigt gevind, der passer sammen med det udvendige gevind i 15 stagboltens nedre ende 15. Akselstykket monteres således i hullet, at gevindhullet forløber hovedsageligt koaksialt med stagbolterøret, så stagbolten problemfrit kan skrues fast i akselstykket. Stagbolten er udformet med sit styrkemæssigt svageste område i det gevindom-20 råde, der skrues ned i akselstykket 29. Hvis stagbolten skulle knække, vil dette ske i det svageste område, hvilket betyder, at det afknækkede nedre stykke vil ligge helt indesluttet i akselstykket 29. Når det øvre stagboltestykke er løftet bort, monteres et aftrækker-25 værktøj på akselstykket, fx ved indskruning i dettes ene ende, og akselstykket trækkes ud af det cylindriske adgangshul i væggen 11. Derefter kan et nyt akselstykke krympes fast ved at afkøle akselstykket og føre det ind i det cylindriske hul, og en ny stagbolt kan monteres.The shaft piece 29 has a threaded hole with an internal thread that fits with the outer thread at the lower end of the stag bolt 15. The shaft piece is mounted in the hole such that the threaded hole extends substantially coaxially with the stag bolt tube so that the stag bolt can be screwed into the shaft seamlessly. The stag bolt is formed with its weakest region of strength in the threaded area which is screwed down into the shaft piece 29. If the stag bolt is to break, this will occur in the weakest area, which means that the broken lower piece will be completely enclosed in the shaft piece 29 When the upper stud bolt piece is lifted, a trigger tool is mounted on the shaft piece, for example, by screwing in one end thereof, and the shaft piece is pulled out of the cylindrical access hole in the wall 11. Then a new shaft piece can be shrunk by cooling the shaft piece and insert it into the cylindrical hole and a new stud bolt can be fitted.
3 0 I fig. 5 ses en fjerde udførelsesform for motoren, hvor stagboltens nedre ende er skruet ned i en møtrik 30, der gennem en sidevendt adgangsåbning i bundrammens øvre parti er ført ind i en recess 31. Oversiden af møtrikken ligger an mod en nedadvende anlægsflade, der 35 udgør loftet i recessen og forløber ringformet rundt om 12 DK 174079 B1 et gennemgangshul, der koaksialt med stagbolterøret passerer fra dette til recessen. Recessen har en sådan højde, at der i bundrammen under møtrikken 30 er et frirum, der i stagboltens længderetning er højere end 5 en stagbolteradius. Hvis stagbolten skulle knække, falder det afknækkede stykke ned til bunden af recessen, og samtidig blotlægges stagboltestykket over møtrikken, så dette om nødvendigt kan skæres over, inden udtagningen gennem den sidevendte åbning ind til recessen.In FIG. 5 shows a fourth embodiment of the motor, in which the lower end of the stud bolt is screwed into a nut 30 which is inserted through a lateral access opening in the upper part of the bottom frame into a recess 31. The upper side of the nut abuts on a downward abutment surface which constitutes 35 the ceiling in the recess and extends annularly around a through-hole which coaxially passes from the stud to the recess coaxially with the stud bolt. The recess has such a height that in the bottom frame under the nut 30 there is a clearance which in the longitudinal direction of the stag bolt is higher than 5 a stag bolt radius. If the stag bolt should break, the broken piece falls to the bottom of the recess and at the same time the stag bolt piece is exposed over the nut so that this can be cut, if necessary, before withdrawing through the lateral opening into the recess.
10 li fig. 6 ses en femte udførelsesform for motoren, hvor frirummet under møtrikken 30 er et hul 32, der koaksialt med stagbolterøret strækker sig fra den nedadvendende anlægsflade i bundrammens øvre parti ned til bundrammens underside, hvor et aftageligt spærreor-15 gan i form af et dæksel 33 spærrer for adgangen til oliekarret 23, så et afknækket stagboltestykke ikke utilsigtet kan falde ned heri. Spærreorganet kan istedet være en pind, der er indsat i en boring, der forløber vandret gennem væggen 11 og skærer hullet 32. Hullet 32 20 har såpas stort tværsnit, at møtrikken 30 kan passere op og ned gennem hullet. Hullet kan være tildannet ved støbningen af bundrammen eller kan være boret ind i tværvæggen efter støbningen. Hvis stagbolten knækker vil det afknækkede stykke 13b falde ned på spærreorganet.10 in FIG. 6 shows a fifth embodiment of the motor, in which the clearance space under the nut 30 is a hole 32 extending coaxially with the stud bolt tube from the downwardly facing abutment surface in the upper part of the bottom frame to the bottom of the bottom frame, in which a removable locking member in the form of a cover 33 barring access to the oil tank 23 so that a disconnected stag bolt cannot accidentally fall into it. The locking means may instead be a pin inserted in a bore extending horizontally through the wall 11 and cutting the hole 32. The hole 32 20 is of such a large cross-section that the nut 30 can pass up and down through the hole. The hole may be formed by the casting of the bottom frame or may be drilled into the transverse wall after casting. If the stud bolt breaks, the broken piece 13b will fall down on the locking member.
25 Stykket 13b kan derefter fjernes ved at demontere spærreorganet, hvorved der skabes adgang til at fjerne stykket 13b gennem bundåbningen i hullet 32.The piece 13b can then be removed by removing the locking means, thereby providing access to remove the piece 13b through the bottom opening of the hole 32.
Tredie, fjerde og femte udførelsesform giver den specielle fordel, at der ved udskiftningen af en knækket 30 stagbolt også foretages en udskiftning af det gevind, hvori den nedre stagbolteende er indskruet, mens udførelsesformerne i fig. 2, 3, 5 og især fig. 4 giver den fordel, at væggen 11 i bundrammen har en fordelagtig stor stivhed.The third, fourth and fifth embodiments provide the special advantage that, when replacing a broken 30 stud bolt, there is also a replacement of the thread in which the lower stud bolt end is screwed in, while the embodiments of FIG. 2, 3, 5 and in particular FIGS. 4 gives the advantage that the wall 11 in the bottom frame has an advantageously large stiffness.
13 DK 174079 B113 DK 174079 B1
Opfindelsen er velegnet til store krydshoved-motorer, uanset om de er udformet med enkelte eller dobbelte stagbolte på hver side af hovedlejerne, og uanset om stagbolterøret er en selvstændigt rør, der kan 5 have cirkulært tværsnit eller flerkantet tværsnit, eller er et rør, der er sammenbygget med afstivningen for krydshovedplanerne.The invention is suitable for large cross-head motors, whether designed with single or double stud bolts on either side of the main bearings, and whether the stud bolts are a stand-alone tube which may have a circular cross-section or multi-sided cross-section, or is a tube which is built together with the bracing for the crosshead plans.
Claims (9)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK199500656A DK174079B1 (en) | 1995-06-09 | 1995-06-09 | Method of Removing a Broken Stag Bolt from a Large Two-Stroke Cross-Head Motor and Such a Motor |
| JP14589396A JP3226458B2 (en) | 1995-06-09 | 1996-06-07 | Method for removing broken stay bolts from a large two-stroke crosshead engine |
| KR1019960020631A KR100389470B1 (en) | 1995-06-09 | 1996-06-10 | How to Remove Large Two-stroke Crosshead Engines and Broken Stay Bolts From It |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK65695 | 1995-06-09 | ||
| DK199500656A DK174079B1 (en) | 1995-06-09 | 1995-06-09 | Method of Removing a Broken Stag Bolt from a Large Two-Stroke Cross-Head Motor and Such a Motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK65695A DK65695A (en) | 1996-12-10 |
| DK174079B1 true DK174079B1 (en) | 2002-05-21 |
Family
ID=8096041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK199500656A DK174079B1 (en) | 1995-06-09 | 1995-06-09 | Method of Removing a Broken Stag Bolt from a Large Two-Stroke Cross-Head Motor and Such a Motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3226458B2 (en) |
| KR (1) | KR100389470B1 (en) |
| DK (1) | DK174079B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010046801A (en) * | 1999-11-15 | 2001-06-15 | 이건훈 | Devive For Removing The Thin Skin Of The Chestnut |
| AT501339B1 (en) * | 2005-01-17 | 2006-11-15 | Avl List Gmbh | Multi-part test camshaft, for a research IC motor, has a number of parts which can be rotated against each other and locked in place with surface marking slits around each |
| EP1826387A2 (en) * | 2006-02-24 | 2007-08-29 | Wärtsilä Schweiz AG | Crosshead diesel engine |
| DE102006045800B4 (en) * | 2006-09-26 | 2013-10-17 | Man Diesel & Turbo Se | Marine diesel engine with a tension tie tension |
| KR20100127694A (en) * | 2009-05-26 | 2010-12-06 | 베르트질레 슈바이츠 악티엔게젤샤프트 | Large crosshead diesel engine |
| JP6675956B2 (en) * | 2016-08-29 | 2020-04-08 | 三菱重工業株式会社 | Frame and crosshead internal combustion engine |
| KR102290868B1 (en) * | 2020-03-03 | 2021-08-20 | 피에이치에이 주식회사 | Auto door closer using mr damper |
-
1995
- 1995-06-09 DK DK199500656A patent/DK174079B1/en not_active IP Right Cessation
-
1996
- 1996-06-07 JP JP14589396A patent/JP3226458B2/en not_active Expired - Fee Related
- 1996-06-10 KR KR1019960020631A patent/KR100389470B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08338306A (en) | 1996-12-24 |
| KR970002076A (en) | 1997-01-24 |
| KR100389470B1 (en) | 2003-11-28 |
| DK65695A (en) | 1996-12-10 |
| JP3226458B2 (en) | 2001-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DK174079B1 (en) | Method of Removing a Broken Stag Bolt from a Large Two-Stroke Cross-Head Motor and Such a Motor | |
| US4601304A (en) | Valve assembly | |
| US2545045A (en) | Threaded insert protector | |
| US4057889A (en) | Engine cylinder sleeve puller and method | |
| RU2654185C2 (en) | Device for fixing two parts together | |
| US9079631B1 (en) | Motorcycle fork adapter | |
| SE542429C2 (en) | Locking and opening device for manhole cover | |
| CN107351021B (en) | Pin removal and method of pulling pin | |
| US7131175B2 (en) | Extraction tool for extracting spiral threaded inserts and use of the extraction tool | |
| US3993147A (en) | Taper lock removable stem for raise bit | |
| FR2638995A1 (en) | DEVICE AND METHOD FOR REMOTELY UNSCREWING AND EXTRACTING A JOINT SCREW | |
| US5553960A (en) | Field serviceable derailleur device | |
| US2033601A (en) | Engine construction | |
| CN110961859B (en) | Device and method for repairing fracture of connecting bolt of engine cylinder cover and cylinder body | |
| US2089230A (en) | Rock drill | |
| US2199738A (en) | Tool joint for drill stems | |
| RU2520807C2 (en) | Device for repair of aircraft engine crankcase flange, aircraft engine module, aircraft engine and method of repair of aircraft engine crankcase flange | |
| CA2807341A1 (en) | Bit assembly for a down-the-hole hammer drill | |
| KR101727659B1 (en) | Repairing method of the bolt hole of clamp bolt for a fuel injector | |
| KR950034282A (en) | How to replace the centering pin of the fuel assembly and the centering pin | |
| EP3669117B1 (en) | System for mounting surgical lightiing on the ceiling with set screws | |
| FR2943834A1 (en) | Seized screw underwater and remote withdrawal device for nuclear reactor i.e. pressurized water nuclear reactor, in industrial facility, has extraction tool for extracting nets from tapping by anti-clockwise rotation of tool | |
| CH473637A (en) | Strawberry | |
| SE1230055A1 (en) | Tools and tool holders for dredgers | |
| CN218802033U (en) | Tool for disassembling and assembling threaded sleeve of small-space deep hole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |
Country of ref document: DK |