GB2203493A - Pneumatic vane type rotary machine - Google Patents
Pneumatic vane type rotary machine Download PDFInfo
- Publication number
- GB2203493A GB2203493A GB08808806A GB8808806A GB2203493A GB 2203493 A GB2203493 A GB 2203493A GB 08808806 A GB08808806 A GB 08808806A GB 8808806 A GB8808806 A GB 8808806A GB 2203493 A GB2203493 A GB 2203493A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rotary machine
- type rotary
- fibres
- vane
- vane type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229920003235 aromatic polyamide Polymers 0.000 claims description 15
- 229920002647 polyamide Polymers 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000000314 lubricant Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/08—Rotary pistons
- F01C21/0809—Construction of vanes or vane holders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/04—Composite, e.g. fibre-reinforced
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Reinforced Plastic Materials (AREA)
- Laminated Bodies (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
1 A pneumatic vane type rotary machine 2203493 This invention relates to a
pneumatic vane type rotary machine which comprises a cylinder and rotor carrying in axially extending slots a number of vanes for sealing cooperation with the cylinder.
A problem concerned with prior art machines of the above type is that a lubricant oil has to be added to the supplied motive pressure air for avoiding a high frictonal resistance between the vanes and the cylinder and, thereby, a rapid wear of the vanes. Such lubricant oil passes through the machine and is exhausted as moisture into the atmosphere, thereby causing an environmental problem, because it is hazardeous to the health breathing air containing oil droplets.
This atmosphere polluting problem concerns mainly the motor application of the above mentioned vane type rotary machine. This machine type, however, is equally applicable as a compressor for air and other gaseous fluids, and when used in the process or food industry lubricant oil is strictly prohibited.
According to the basic concept of the present invention as recited in the main claim, the above problem is solved by an improved pneumatic vane type rotary machine in which each vane consists of a selflubricating material comprising a matrix of polyamid reinforced by aramid fibres.
According to previous attempts to solve this problem carbon fibre reinforced polymers with high temperature limits have been suggested. The results have not been satisfactory. The service life of the vanes in oil free operation has been far too short.
Our choice of PolYamid as a matrix material is in itself unobvious. Due to its hygroscopic properties, which has a negative influence upon the dimension stability at various degrees of moisture absorption, as well as to its low melting temperature polyamid has been regarded as quite unsuitable for this purpose.
87706-880411 2 1 On the other hand, polyamid has very good friction properties visavi steel, and when reinforced with aramid fibres which have good friction properties too, there is obtained a vane material with selflubricating properties which is suitable primarily for smaller air motors where the strain on the vanes is not too high.
For higher performance specifications, fibres.of a high modulus of elasticity, for example fibres of glass or carbon, are added and give together with the aramid fibres a high flexural strength of the vanes.
The aramid fibres may be in a chopped form mixed into the polyamid matrix or in continuous form and arranged in layers formed for instance by weaving and hot pressing together with the polyamid matrix which melts and impregnates the fibres. When in a short chopped form, the aramid fibres are comprised in the material in a rate of 5-30 %, preferably about 15 % and when in a long chopped form the fibre rate is 10-60 %. The aramid fibres may also be contained in a continuous form and then be comprised in a rate of 30-80 %, preferably 70-80 % or in as high a rate as possible without causing weakening of the bonding between matrix and fibres.
On the enclosed drawing:
Fig 1 shows a longitudinal section through a pneumatic vane motor according to the invention.
Fig 2 shows a cross section along line II-II in Fig 1.
Fig 3 shows a cross section through a vane according to a preferred embodiment of the invention.
The vane motor shown in Figs 1 and 2 comprises a cylinder 10 and a rotor 11. In axially extending slots 12 in the rotor 11 there are supported vanes 13 for sealing cooperation with the cylinder 10. Through alternative inl,et ports 14 and 15 motive pressure air is fed 87706-880411 Q 3 into the cylinder 10, and through outlet ports 16 exhaust air is vented into the ambient atmosphere.
A motor of this type is suitable for use in pneumatic power tools, such as surface grinders, drilling machines, screw drivers and power wrenches. In such applications, it is an important step forward to be able to omit the lubricant oil usually added to the motive pressure air, thereby avoiding pollution of the atmosphere. By omitting the oil additive, it is possible to keep the power tool handles clean of oil, thereby improving the grip safety and also avoiding allergic reactions from operators who are sensitive to oil.
According to a preferred embodiment of the invention, a heavy duty vane is formed by a core of continuous aramid fibre layers which are impregnated by a polyamid matrix and two surface layers comprising continuous fibres of high modulus of elasticity, from for instance carbon or class, arranged in a cross pattern and impregnated by polyamid. This vane is illustrated.in Fig 3 where the core is designated 20 and the two surfacae layers 21, 22 sandwiching the core.
i 87706-880411 4 1
Claims (10)
1. A pneumatic vane type rotary machine, comprising a cylinder (10), and a rotor (11) carrying in axially extending slots (12) a number of vanes (13) for sealing cooperation with said cylinder (10), characterized i n that each of said vanes (13) consists of a selflubricating material comprising a matrix of polyamid, reinforced by aramid fibres.
2. Vane type rotary machine according to claim 1, wherein said aramid fibres comprise continuous fibres and are contained in an amount of 3080%.
3. Vane type rotary machine according to claim 2, wherein said aramid fibres are comprised in a number of layers which together with said polyamid matrix form said vane.
4. Vane type rotary machine according to claim 3, wherein said aramid fibres are arranged in weaves to form said layers.
5. Vane type rotary machine according to claims 1 or 2, wherein said vane material also comprises fibres of a high modulus o elasticity in a rate of 5-20% for further reinforcement of said vane.
6. Vane type rotary machine according to claim 1 or 2, wherein said aramid fibres are comprised in a number of layers which together with said polyamid matrix form a core (20) of said vane (13), and said fibres of a high modulus of elasticity are comprised in layers (21, 22) which together with said polyamid matrix form surface layers sandwiching said core (20).
7. Vane type rotary machine according to claim 6, wherein said aramid fibres are arranged in weaves to form said core forming layers, and said fibres of a high modulus of elasticity are arranged in weaves to form said surface forming layers.
87706-880411
8. Vane type rotary machine according to claim 1, wherein said aramid fibres comprise short chopped fibres and are contained in said vane material in a rate of 5-30%---
9. Vane type rotary machine according to claim 1, wherein said aramid fibres comprise long chopped fibres and are contained in said vane material in a rate of 10-60 %.
10. A pneumatic vane type rotary machine, substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
87706-880411 Publiblied 1988 at The Patent Office, State House, 86/71 High Holborn, London WC1R 4TP. Further copies may be obtained from The Patent Office, Sales Branch, St Maxy Cray, Orpington, Kent BRS 3RD. Printed by Multiplex techniques ltd, St Mw7 Cray, Kent. Con. 1187.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8701614A SE8701614L (en) | 1987-04-16 | 1987-04-16 | A PNEUMATIC LAMELY TYPE ROTATION MACHINE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8808806D0 GB8808806D0 (en) | 1988-05-18 |
| GB2203493A true GB2203493A (en) | 1988-10-19 |
Family
ID=20368235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08808806A Withdrawn GB2203493A (en) | 1987-04-16 | 1988-04-14 | Pneumatic vane type rotary machine |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS6415486A (en) |
| DE (2) | DE8810994U1 (en) |
| FR (1) | FR2614070A1 (en) |
| GB (1) | GB2203493A (en) |
| IT (1) | IT1219533B (en) |
| SE (1) | SE8701614L (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5359172A (en) * | 1992-12-30 | 1994-10-25 | Westinghouse Electric Corporation | Direct tube repair by laser welding |
| DE19744812A1 (en) * | 1997-10-02 | 1999-04-08 | Herold & Semmler Transporttech | Rotary piston engine for use as a drive or a pump |
| DE20021980U1 (en) * | 2000-12-27 | 2002-05-08 | Cooper Power Tools Gmbh & Co | air motor |
| DE20201123U1 (en) * | 2002-01-26 | 2003-07-03 | Deprag Schulz Gmbh U Co | Compressed air vane motor |
| DE102006011913A1 (en) * | 2006-03-09 | 2007-09-13 | Joma-Hydromechanic Gmbh | Vacuum pump e.g. cold or warm vacuum pump, has vane tips radially protruding out of rotor on both sides and lying on inner peripheral surface of housing, and vane defining suction chamber and pressure chamber consisting of polyamide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6124486A (en) * | 1984-07-13 | 1986-02-03 | Fuji Kagakushi Kogyo Co Ltd | Multiple printing type pressure-sensitive transfer recording medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3512908A (en) * | 1968-09-16 | 1970-05-19 | Black & Decker Mfg Co | Vane construction for pneumatic device |
| DE2421906C2 (en) * | 1974-05-07 | 1984-04-26 | UNUS dei F.lli Rossato V. & S., S.N.C., Padua | Rotary piston air pump |
| DE2600972A1 (en) * | 1976-01-13 | 1977-03-31 | Herbert Prof Dipl Ing Hoelz | Self-lubricating radial vane pump - with vanes made from fibre reinforced polymeric materials or carbon and sliding in grooves lined with PTFE |
| US4209286A (en) * | 1978-09-27 | 1980-06-24 | Schwartz Kenneth P | Self lubricating vane for a rotary vane cooling system |
| SE427492B (en) * | 1979-06-15 | 1983-04-11 | Cerac Inst Sa | LAMELLMASKIN |
-
1987
- 1987-04-16 SE SE8701614A patent/SE8701614L/en not_active Application Discontinuation
-
1988
- 1988-02-12 DE DE8810994U patent/DE8810994U1/en not_active Expired
- 1988-02-12 DE DE3804338A patent/DE3804338A1/en not_active Withdrawn
- 1988-04-14 GB GB08808806A patent/GB2203493A/en not_active Withdrawn
- 1988-04-15 JP JP63091874A patent/JPS6415486A/en active Pending
- 1988-04-15 IT IT47853/88A patent/IT1219533B/en active
- 1988-04-18 FR FR8805086A patent/FR2614070A1/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6124486A (en) * | 1984-07-13 | 1986-02-03 | Fuji Kagakushi Kogyo Co Ltd | Multiple printing type pressure-sensitive transfer recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6415486A (en) | 1989-01-19 |
| IT1219533B (en) | 1990-05-18 |
| DE8810994U1 (en) | 1988-11-10 |
| SE8701614L (en) | 1988-10-17 |
| IT8847853A0 (en) | 1988-04-15 |
| DE3804338A1 (en) | 1988-11-03 |
| SE8701614D0 (en) | 1987-04-16 |
| FR2614070A1 (en) | 1988-10-21 |
| GB8808806D0 (en) | 1988-05-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |