AU2007231555A1 - A supplement lubricant free pneumatic motor - Google Patents
A supplement lubricant free pneumatic motor Download PDFInfo
- Publication number
- AU2007231555A1 AU2007231555A1 AU2007231555A AU2007231555A AU2007231555A1 AU 2007231555 A1 AU2007231555 A1 AU 2007231555A1 AU 2007231555 A AU2007231555 A AU 2007231555A AU 2007231555 A AU2007231555 A AU 2007231555A AU 2007231555 A1 AU2007231555 A1 AU 2007231555A1
- Authority
- AU
- Australia
- Prior art keywords
- motor
- rotor
- chamber
- air outlet
- baffling
- 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.)
- Abandoned
Links
- 239000000314 lubricant Substances 0.000 title claims description 11
- 239000013589 supplement Substances 0.000 title description 2
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 3
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- -1 polyoxymethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000011435 rock Substances 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
- F01C21/04—Lubrication
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
- A61B2017/00544—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated pneumatically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/91—Coating
-
- 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
- F05C2251/00—Material properties
- F05C2251/14—Self lubricating materials; Solid lubricants
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Description
WO 2007/109859 PCT/AU2007/000404 A Supplement Lubricant Free Pneumatic Motor Technical Field The present invention relates to a pneumatic motor. The invention has been developed primarily for use in underground mining and tunnelling tools, such as a 5 roofbolter, and will be described hereinafter with reference to this application. However, it will be appreciated that the invention is not limited to this particular field of use. Other applications include motors for processing equipment in the food and pharmaceutical industry, in which contamination-free process equipment is required. Background of the Invention 10 Pneumatic motors use rotors driven by compressed air and are common in power tools and other machinery. Pneumatic motors using very clean and dry air can be operated without supplementary lubrication. However, most pneumatic motors require supplementary lubrication to function reliably with durability. The supplementary lubrication is fed into the compressed air stream by a controlled drip rate of oil relative to is the supplied airflow. All the components exposed to the compressed air are then coated with a film of oil. In mining and construction, pneumatic motors rely more heavily on the supplementary lubrication to combat compressed air that can be highly contaminated with contaminants such as water, rock and coal. Without the supplementary lubrication, 20 corrosion and fouling of internal components can render the equipment inoperable in a short time. The lubricators which feed oil into the airflow are generally unreliable and often result in too little or too much oil being fed in. As noted above, lack of oil feed will reduce the operational life of the equipment. Excessive oiling reduces the performance of 25 the equipment due to the sludging of internal components. Excessive oiling can also render the equipment inoperable. The responsibility for maintaining oil supply to the lubricators generally falls to the operators, who, in practice, rarely check the lubricator oil level and often operate equipment without sufficient oil. A lubricator without sufficient oil can also act as a 30 water trap which results in water being fed into the air stream and the misconception that the lubricator is full of oil. Further, equipment with motors having supplementary lubrication expel a fine mist of oil with their exhausted air. This can be detrimental to the health of operators WO 2007/109859 PCT/AU2007/000404 2 who inhale the contaminated air and creates a potential occupational health and safety liability. Object of the Invention It is the object of the present invention to substantially overcome or at least s ameliorate one or more of the disadvantages of the prior art, or to provide a useful alternative. Summary of the Invention Accordingly, the present invention provides a pneumatic motor having: a motor body having an air inlet and an air outlet; 10 at least one rotor mounted in a chamber of the motor body and adapted to be driven by compressed air fed into the air inlet; and an adhesive lubricant applied to the at least one rotor, the lubricant being sufficiently adhesive to remain substantially adhered to the at least one rotor under operational speeds in excess of 13500 rpm. 15 Preferably, the at least one rotor includes a drive rotor and an idler rotor. Further preferably, the rotors are mounted on sealed cage deep groove ball bearings. In a preferred embodiment, the motor body is constructed from corrosion resistant material. Preferably, the motor further includes a reduction gearbox having a gearbox body constructed from a corrosion resistant material. Preferably, the corrosion 20 resistant material comprises nylon, stainless steel or acetyl resin engineering plastic. In an optional embodiment, the motor is adapted for bidirectional rotation and the air inlet and air outlet are selectively interchangeable. In a preferred embodiment, the motor body includes internal baffling formed in the motor body and associated with the air outlet, the baffling being adapted to muffle 25 motor noise. Preferably, the motor body comprises a wall surrounding the chamber and the baffling is provided in a conduit formed within the wall, the conduit providing fluid communication between the chamber and the air outlet. Further preferably, the baffling is provided by the conduit following a corrugated path within the wall. Optionally, the conduit extends around the wall, substantially circumventing the chamber. 30 Preferably, the adhesive lubricant is Optimol Paste White T Spray (trade mark), marketed by Castrol.
WO 2007/109859 PCT/AU2007/000404 3 Brief Description of the Drawings A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings wherein: Fig. 1 is a side view of an embodiment of a motor according to the invention; 5 Fig. 2 is a front view of the motor depicted in Fig. 1; Fig. 3 is an open top view of the motor of Fig. 1; Fig. 4 is a perspective view of the motor of Fig. 1, showing internal detail; and Fig. 5 is a top view of the motor of Fig. 4. Detailed Description of the Preferred Embodiments 10 Referring to the drawings, Figs. 1 to 5 depict an embodiment of a motor 10 according to the present invention. The motor 10 comprises a motor body 12, having an air inlet 14 and an air outlet 16. The motor body 12 has a chamber 15 in fluid communication with the air inlet 14 and air outlet 16. The chamber 15 houses a steel alloy drive rotor 18 on a drive shaft 20 and a steel alloy idler rotor 22, intermeshed with 15is the drive rotor 18, on an idler shaft 24. Each shaft 20, 24 is mounted on sealed cage deep groove ball bearings (not shown). A conduit 25 extends from an opening 26 to the air outlet 16. The conduit 25 is formed within the wall of the motor body 12, extending around the periphery of the chamber 15 and following a corrugated path. During construction of the motor 10, the rotors 18, 22 are sprayed with an 20 adhesive lubricant such as Optimol Paste White T Spray (trade mark) marketed by Castrol. The lubricant is sufficiently adhesive to remain adhered to the rotors 18, 22 under operational speeds in excess of 13500 rpm. In operation, compressed air is fed into the air inlet 14. Since the intermeshed rotors 18, 22 prevent air passing between the rotors 18, 22, the air is forced around the 25 periphery of the rotors 18, 22. As the air flows between the rotors 18, 22 and the wall of the motor body 12, the air drives the two rotors 18, 22 to rotate in the direction indicated by the arrows. The air then exits the chamber 15 via the opening 26 and flows along the corrugated conduit 25 around the periphery of the chamber 15 before being expelled via 30 the air outlet 16. As the air travels along the conduit 25 noise energy is absorbed into the wall of the motor body 12 and the noise output at the air outlet 16 is reduced. Since the adhesive lubricant adheres to the rotors 18, 22 at normal operational speeds, the motor 10 doesn't require supplementary lubrication. This results in cleaner exhaust, less maintenance and more reliable performance.
WO 2007/109859 PCT/AU2007/000404 4 The motor body 12 is advantageously constructed from corrosion resistant material such as nylon, stainless steel or acetyl resin engineering plastic, such as polyoxymethylene. This construction provides a light weight motor that is not susceptible to corrosion when used in contaminated environments. 5 The motor 10 can also be configured to operate selectively in forward or reverse, i.e. bidirectional rotation. When the motor is operated in reverse, the air inlet becomes the air outlet and vice versa. This feature is particularly advantageous in applications of the motor in the food and pharmaceutical industry. Although the invention has been described with reference to a specific example, 10 it will be appreciated by those skilled in the art that the invention may be embodied in other forms.
Claims (12)
1. A pneumatic motor having: 5 a motor body having an air inlet and an air outlet; at least one rotor mounted in a chamber of said motor body and adapted to be driven by compressed air fed into said air inlet; and an adhesive lubricant applied to said at least one rotor, said lubricant being sufficiently adhesive to remain substantially adhered to said at least one rotor under 10 operational speeds in excess of 13500 rpm.
2. The motor of claim 1, wherein said at least one rotor includes a drive rotor and an idler rotor.
3. The motor of claim 1 or 2, wherein said rotors are mounted on sealed cage deep groove ball bearings. s15
4. The motor of any one of the preceding claims, wherein said motor body is constructed from corrosion resistant material.
5. The motor of any one of the preceding claims, wherein said motor further includes a reduction gearbox having a gearbox body constructed from corrosion resistant material. 20
6. The motor of claim 4 or 5 wherein the corrosion resistant material comprises nylon, stainless steel or acetyl resin engineering plastic.
7. The motor of any one of the preceding claims, wherein the motor is adapted for bidirectional rotation and the air inlet and air outlet are selectively interchangeable. 25
8. The motor of any one of the preceding claims, wherein said motor body includes internal baffling formed in said motor body and associated with said air outlet, said baffling being adapted to muffle motor noise.
9. The motor of claim 8, wherein said motor body comprises a wall surrounding said chamber and wherein said baffling is provided in a conduit formed 30 within said wall, said conduit providing fluid communication between said chamber and said air outlet.
10. The motor of claim 9, wherein said baffling is provided by said conduit following a corrugated path within said wall.
11. The motor of claim 9 or 10, wherein said conduit extends around said 35 wall, substantially circumventing said chamber. WO 2007/109859 PCT/AU2007/000404 6
12. The motor of any one of the preceding claims, wherein the adhesive lubricant is Optimol Paste White T Spray (trade mark).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2007231555A AU2007231555A1 (en) | 2006-03-29 | 2007-03-29 | A supplement lubricant free pneumatic motor |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006901600 | 2006-03-29 | ||
AU2006901600A AU2006901600A0 (en) | 2006-03-29 | A motor | |
AU2007231555A AU2007231555A1 (en) | 2006-03-29 | 2007-03-29 | A supplement lubricant free pneumatic motor |
PCT/AU2007/000404 WO2007109859A1 (en) | 2006-03-29 | 2007-03-29 | A supplement lubricant free pneumatic motor |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2007231555A1 true AU2007231555A1 (en) | 2007-10-04 |
Family
ID=38540730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2007231555A Abandoned AU2007231555A1 (en) | 2006-03-29 | 2007-03-29 | A supplement lubricant free pneumatic motor |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100028187A1 (en) |
EP (1) | EP2002091A1 (en) |
CN (1) | CN101415913A (en) |
AU (1) | AU2007231555A1 (en) |
RU (1) | RU2008142732A (en) |
WO (1) | WO2007109859A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2457301B (en) * | 2008-02-11 | 2013-03-13 | Energetix Pnu Power Ltd | Lubrication of positive displacement expanders |
CN103089284B (en) * | 2013-02-06 | 2015-04-29 | 石家庄中煤装备制造股份有限公司 | Pneumatic jumbolter |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1836249A (en) * | 1923-02-19 | 1931-12-15 | Sullivan Machinery Co | Motor |
US3857461A (en) * | 1973-04-16 | 1974-12-31 | Caterpillar Tractor Co | Bidirectional pump system having plural lubrication circuits |
FR2318817A1 (en) * | 1975-07-21 | 1977-02-18 | Binaut Jean | IMPROVEMENTS IN PNEUMATIC OR HYDRAULIC MACHINES AND IN PARTICULAR MACHINES FOR MINING SITES AND PUBLIC WORKS |
US4202719A (en) * | 1978-04-10 | 1980-05-13 | Molins Machine Company, Inc. | Single facer drive |
GB8415879D0 (en) * | 1984-06-21 | 1984-07-25 | Dowty Hydraulic Units Ltd | Rotary positive displacement fluid-pressure machines |
US5554020A (en) * | 1994-10-07 | 1996-09-10 | Ford Motor Company | Solid lubricant coating for fluid pump or compressor |
US5823452A (en) * | 1997-05-05 | 1998-10-20 | Ballew; Russell | Flaker mill |
US6668971B2 (en) * | 1998-01-13 | 2003-12-30 | Robert E. Sterling | Pneumatic hand tool exhaust muffler having inner and outer tubes |
WO2000004276A1 (en) * | 1998-07-17 | 2000-01-27 | J. D. Neuhaus Gmbh & Co. Kg | Pneumatic motor lubrication |
DE20021980U1 (en) * | 2000-12-27 | 2002-05-08 | Cooper Power Tools Gmbh & Co | air motor |
CA2427306A1 (en) * | 2003-04-30 | 2004-10-30 | Vilho O. Mantyla | Sound muffling apparatus for air operated equipment |
-
2007
- 2007-03-29 EP EP07718651A patent/EP2002091A1/en not_active Withdrawn
- 2007-03-29 RU RU2008142732/06A patent/RU2008142732A/en not_active Application Discontinuation
- 2007-03-29 CN CNA2007800122670A patent/CN101415913A/en active Pending
- 2007-03-29 WO PCT/AU2007/000404 patent/WO2007109859A1/en active Application Filing
- 2007-03-29 US US12/294,847 patent/US20100028187A1/en not_active Abandoned
- 2007-03-29 AU AU2007231555A patent/AU2007231555A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP2002091A1 (en) | 2008-12-17 |
US20100028187A1 (en) | 2010-02-04 |
WO2007109859A1 (en) | 2007-10-04 |
CN101415913A (en) | 2009-04-22 |
RU2008142732A (en) | 2010-05-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |