NL8001108A - CYLINDRICAL HOLLOW BODY OF COMPOSITE FIBER MATERIAL. - Google Patents
CYLINDRICAL HOLLOW BODY OF COMPOSITE FIBER MATERIAL. Download PDFInfo
- Publication number
- NL8001108A NL8001108A NL8001108A NL8001108A NL8001108A NL 8001108 A NL8001108 A NL 8001108A NL 8001108 A NL8001108 A NL 8001108A NL 8001108 A NL8001108 A NL 8001108A NL 8001108 A NL8001108 A NL 8001108A
- Authority
- NL
- Netherlands
- Prior art keywords
- hollow body
- layer
- longitudinal axis
- fiber strands
- cylindrical hollow
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/08—Centrifuges for separating predominantly gaseous mixtures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
- B04B7/085—Rotary bowls fibre- or metal-reinforced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
- B29C70/205—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration
- B29C70/207—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration arranged in parallel planes of fibres crossing at substantial angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
- F16C3/026—Shafts made of fibre reinforced resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
- Laminated Bodies (AREA)
- Centrifugal Separators (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Description
* - 1 -* - 1 -
Cilindrisch hol lichaam van samengesteld vezelmateriaal.Cylindrical hollow body of composite fiber material.
De uitvinding heeft betrekking op een cilindrisch hol lichaam van samengesteld vezelmateriaal, dat bedoeld is om te worden blootgesteld aan een snelle rotatie om zijn lengte-as, met ten minste een laag vezelstrengen, 5 die over elkaar gekruist zijn en met de lengte-as van het holle lichaam zowel in de ene richting alsook in de andere dezelfde hoek insluiten, en met ten minste een tweede laag van in omtreksrichting verlopende vezelstrengen, die radiaal geheel aan de buitenzijde aangebracht zijn.The invention relates to a cylindrical hollow body of composite fiber material, which is intended to be exposed to a rapid rotation about its longitudinal axis, with at least one layer of fiber strands, which are crossed over one another and with the longitudinal axis of enclose the hollow body in the same direction both in one direction and in the other, and with at least a second layer of circumferentially extending fiber strands, which are arranged radially entirely on the outside.
10 Bij de bekende snel roterende cilindrische holle lichamen verlopen de gekruiste vezelstrengen ten opzichte van de lengte-as van het lichaam onder een hoek van ongeveer + 25°. Deze hoek wordt verkregen bij optimalisering van de sterkte van het holle lichaam onder toepassing van de 15 continuümtheorie, waarbij vooropgesteld wordt, dat de bij de rotatiebeweging in de matrix optredende spanningen noch tot scheurvorming, noch tot kruipvorming leiden. Zoals uit proeven is gebleken, is het gevaar van scheurvorming in de matrix bij aanbrenging van de vezelstrengen onder een 20 hoek. van + 25° ten opzichte van de lengte-as van het holle lichaam evenwel zeer groot. Dit gevaar van scheurvorming kan evenwel worden verminderd, doordat een matrixsysteem met relatief hoge belastingsrek wordt gebruikt. Daardoor wordt evenwel het nadeel verkregen, dat de doorbuiging van 25 het holle lichaam bij langere looptijd onevenredig groot is.In the known rapidly rotating cylindrical hollow bodies, the crossed fiber strands extend at an angle of approximately + 25 ° with respect to the longitudinal axis of the body. This angle is obtained by optimizing the strength of the hollow body using the continuum theory, it being postulated that the stresses occurring in the matrix during the rotational movement do not lead to cracking or creeping. As tests have shown, the danger of cracking in the matrix when the fiber strands are applied is at an angle. of + 25 ° relative to the longitudinal axis of the hollow body, however, very large. However, this risk of cracking can be reduced by using a matrix system with a relatively high load elongation. However, this has the drawback that the deflection of the hollow body is disproportionately large with a longer running time.
Het is nu het doel van de uitvinding de inrichting der vezelstrengen voor het holle lichaam zodanig uit te voeren, dat ook matrixsystemen met relatieve hoge belastingsrek kunnen worden gebruikt, zonder dat de doorbuiging van 30 het holle lichaam bij langere looptijd ten opzichte van de doorbuiging van het bekende holle lichaam wordt vergroot.The object of the invention is now to design the arrangement of the fiber strands for the hollow body in such a way that matrix systems with relatively high load elongation can also be used, without the deflection of the hollow body at a longer running time relative to the deflection of the known hollow body is enlarged.
Uitgaande van het inzicht, dat bij een met een dwarskracht belaste buis in de neutrale as de normaal-spanning σ nul is en de schuifspanning τ een maximum heeft, 35 terwijl in de randzones de schuifspanning τ nul is en de normaalspanning σ een maximum heeft, wordt volgens de uitvinding voorgesteld, dat bij een cilindrisch hol lichaam 8001108 - 2 - van de in de aanhef omschreven soort ten minste een tweede laag vezelstrengen is aangebracht, die ongeveer parallel ten opzichte van de lengte-as van het holle lichaam verlopen, en dat de hoek tussen de lengte-as van het holle 5 lichaam en de gekruist verlopende vezelstrengen van de ene laag +45° bedraagt.Assuming that with a tube with a transverse force in the neutral axis the normal stress σ is zero and the shear stress τ has a maximum, while in the peripheral zones the shear stress τ is zero and the normal stress σ has a maximum, It is proposed according to the invention that in a cylindrical hollow body 8001108 - 2 - of the type described in the preamble, at least a second layer of fiber strands, which run approximately parallel to the longitudinal axis of the hollow body, is provided, and that the angle between the longitudinal axis of the hollow body and the crossed fiber strands of the one layer is + 45 °.
Onder toepassing van een matrix met relatief hoge belastingsrek werd een cilindrisch hol lichaam met een zgn. lengtelaag van + 25° vervaardigd, alsmede een cilindrisch 10 hol lichaam met een lengtelaag van + 5° en een diagonaallaag van + 45°, en de doorbuiging van de beide holle lichamen werd met elkaar vergeleken. De hoek van + 5° in plaats van 0° voor de lengtelaag werd daarbij om fabricagetechnische redenen gekozen.Using a matrix with a relatively high load elongation, a cylindrical hollow body with a so-called + 25 ° longitudinal layer was produced, as well as a cylindrical hollow body with a + 5 ° longitudinal layer and a + 45 ° diagonal layer, and the deflection of the two hollow bodies were compared. The angle of + 5 ° instead of 0 ° for the longitudinal layer was chosen for manufacturing reasons.
15 Terwijl het holle lichaam met de lengtelaag van +25° reeds na enkele uren een sterke toename van de doorbuiging (tot 0,9 mm) toonde, liep het holle lichaam met de lengte en de diagonaallaag ongeveer 1000 uur met constant kleine doorbuiging van ongeveer 0,04 mm.While the hollow body with the longitudinal layer of + 25 ° already showed a sharp increase in deflection (up to 0.9 mm) after only a few hours, the hollow body with the length and the diagonal layer ran for about 1000 hours with a constant small deflection of about 0.04 mm.
20 Op grond van de toepassing van een verdere lengtelaag en de diagonaallaag bij het holle lichaam volgens de uitvinding kunnen ook hogere onbalansen worden toegelaten, zonder dat daarbij rekening behoeft te worden gehouden met een te sterke doorbuiging. Het cilindrische holle lichaam 25 volgens de uitvinding kan ook aan hoge temperaturen worden blootgesteld, zonder dat de stijfheid daarvan beïnvloed wordt,Owing to the use of a further longitudinal layer and the diagonal layer in the hollow body according to the invention, higher imbalances can also be permitted, without taking into account too much deflection. The cylindrical hollow body 25 according to the invention can also be exposed to high temperatures, without affecting its stiffness,
Het cilindrische holle lichaam volgens de uitvinding is in het bijzonder geschikt voor toepassing als 30 rotorbuis bij een gasultracentrifuge.The cylindrical hollow body according to the invention is particularly suitable for use as a rotor tube in a gas ultracentrifuge.
De uitvinding zal thans nader worden toegelicht aan de hand van de tekening.The invention will now be further elucidated with reference to the drawing.
In de tekening is de lagenopbouw getoond bij een volgens de uitvinding geconstrueerde rotor voor een gas-35 ultracentrifuge, waarbij de vezelstrengen in een voor de vakman gebruikelijk wikkelingsprocédé bij opgebracht op een doorn, die na het uitharden van het mantellichaam is verwijderd. De onderste vezellaag van de rotor, die onder een hoek van 90° ten opzichte van de lengte-as van de 40 rotor is gewikkeld, is aangegeven met 1. De daaropvolgende 8001108 ♦ iri - 3 - laag, waarbij de vezelstrengen parallel of nagenoeg parallel ten opzichte van de lengte-as van de rotor verlopen, is aangegeven met 2. De volgende laag, de zgn. diagonaallaag, waarbij de vezelstrengen gekruist onder een 5 hoek α van + 45° ten opzichte van de rotoras verlopen, draagt het verwijzingscijfer 3. De buitenste laag, de zgn. omtrekslaag, is met 4 aangegeven. Bij een alternatieve lagenopbouw is de laag 1 weggelaten en/of een verdere in omtreksrichting gewikkelde laag tussen de lagen 2 en 3 10 aangèbracht. Vanzelfsprekend strekken de afzonderlijke lagen zich bij de praktische uitvoering van de rotor uit over de gehele lengte daarvan? in de tekening zijn zij uitsluitend met het oog op een beter begrip van de uitvinding op trapvormig verlopende wijze getekend.The drawing shows the layer structure in a rotor constructed according to the invention for a gas ultracentrifuge, in which the fiber strands are applied to a mandrel, which has been removed after curing of the jacket body, in a winding process customary for the skilled person. The lower fiber layer of the rotor, which is wrapped at an angle of 90 ° to the longitudinal axis of the 40 rotor, is indicated by 1. The subsequent 8001108 ♦ iri - 3 layer, with the fiber strands parallel or nearly parallel with respect to the longitudinal axis of the rotor, is indicated by 2. The next layer, the so-called diagonal layer, in which the fiber strands cross at an angle α of + 45 ° with respect to the rotor axis, bears the reference number 3 The outer layer, the so-called circumferential layer, is indicated by 4. In an alternative layer construction, the layer 1 has been omitted and / or a further circumferentially wound layer has been applied between the layers 2 and 3. Obviously, in the practical design of the rotor, do the individual layers extend over the entire length thereof? they are shown in a stepwise manner in the drawing for the purpose of better understanding the invention.
15 De toepassing van de uitvinding beperkt zich niet tot rotorbuizen voor gasultracentrifuges, maar vindt toepassing bij elk snel roterend cilindrisch hol lichaam, dat uit samengesteld vezelmateriaal is vervaardigd.The application of the invention is not limited to rotor tubes for gas ultracentrifuges, but applies to any rapidly rotating cylindrical hollow body made of composite fiber material.
- conclusies - 8001108- conclusions - 8001108
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792909393 DE2909393A1 (en) | 1979-03-09 | 1979-03-09 | CYLINDRICAL HOLLOW BODY MADE OF FIBER COMPOSITE |
| DE2909393 | 1979-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8001108A true NL8001108A (en) | 1980-12-31 |
Family
ID=6064999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8001108A NL8001108A (en) | 1979-03-09 | 1980-02-22 | CYLINDRICAL HOLLOW BODY OF COMPOSITE FIBER MATERIAL. |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2909393A1 (en) |
| GB (1) | GB2063209B (en) |
| NL (1) | NL8001108A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3116520A1 (en) * | 1981-04-25 | 1982-11-18 | Heraeus-Christ Gmbh, 3360 Osterode | "CENTRIFUGAL ROTOR" |
| GB2133499B (en) * | 1982-11-16 | 1985-10-09 | Honda Motor Co Ltd | Shafts incorporating fibre-reinforced plastics |
| DE3320605A1 (en) * | 1983-06-08 | 1984-12-13 | Schaab, Brigitta, 8950 Kaufbeuren | Deformation element and process for the manufacture thereof |
| US4738656A (en) * | 1986-04-09 | 1988-04-19 | Beckman Instruments, Inc. | Composite material rotor |
| FR2603228B1 (en) * | 1986-08-28 | 1989-06-02 | Aerospatiale | PROCESS FOR PRODUCING RIGID LINKS OF COMPOSITE MATERIAL AND LINKS OF ROBOT ARMS INCLUDING APPLICATION. |
| GB9027629D0 (en) * | 1991-05-31 | 1991-05-31 | Rolls Royce Plc | A fibre reinforced component and a method of manufacturing such a component |
| EP0611328A1 (en) * | 1991-10-21 | 1994-08-24 | Beckman Instruments, Inc. | Hybrid centrifuge sample container |
| JPH07329199A (en) * | 1994-06-06 | 1995-12-19 | Nippon Oil Co Ltd | Cylindrical molding of fiber-reinforcing composite material |
| AT411787B (en) * | 2001-10-31 | 2004-05-25 | Siemens Sgp Verkehrstech Gmbh | HOLLOW SHAFT |
| DK200970028A (en) | 2009-06-12 | 2010-12-13 | Alfa Laval Corp Ab | A decanter centrifuge and a screw conveyor |
| GB202111881D0 (en) | 2021-08-19 | 2021-10-06 | Rolls Royce Plc | Shaft component and method for producing a shaft component |
-
1979
- 1979-03-09 DE DE19792909393 patent/DE2909393A1/en not_active Withdrawn
-
1980
- 1980-02-18 GB GB8004903A patent/GB2063209B/en not_active Expired
- 1980-02-22 NL NL8001108A patent/NL8001108A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2909393A1 (en) | 1981-03-12 |
| GB2063209A (en) | 1981-06-03 |
| GB2063209B (en) | 1983-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BV | The patent application has lapsed |