CN102094820B - Self-lubricating slip sheet rotary air compressor - Google Patents
Self-lubricating slip sheet rotary air compressor Download PDFInfo
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- CN102094820B CN102094820B CN201110065800A CN201110065800A CN102094820B CN 102094820 B CN102094820 B CN 102094820B CN 201110065800 A CN201110065800 A CN 201110065800A CN 201110065800 A CN201110065800 A CN 201110065800A CN 102094820 B CN102094820 B CN 102094820B
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Abstract
The invention belongs to the field of air compressors, in particular relating to a self-lubricating slip sheet rotary air compressor which comprises an eccentric type air cylinder body, an air cylinder body outer sleeve and a rotor shaft with a slip sheet groove, wherein two ends of the rotor shaft are provided with a driving end cover and an air inlet end cover; the slip sheet groove is internally provided with slip sheet sets, and each slip sheet set is composed of two self-lubricating slip sheets with ladder pressing tables, the two self-lubricating slip sheets are pressed mutually through the ladder pressing tables and are connected and positioned through an elastic connecting device, and the self-lubricating slip sheets are internally provided with balance weights. Oil-free lubricating is realized through selecting the self-lubricating slip sheets, thus energy conservation and emission reduction are ensured; two self-lubricating slip sheets of the slip sheet sets are pressed mutually through the ladder pressing tables, and the air blow-by problem at the interface is solved; the balance weights are arranged, thus the self-lubricating slip sheets are ensured to contact with the air cylinder body in a seal mode under the action of the centrifugal force; and the elastic connecting device ensures that the terminals of the self-lubricating slip sheets are in close contact with the two end covers all the time, thus the abrasion of the two end covers and the self-lubricating slip sheets can be compensated, and air blow-by and leakage caused by gaps generated by abrasion are avoided.
Description
Technical field
The present invention relates to a kind of selflubricating slide plate rotary air compressor, belong to the air compressor field.
Background technique
In extensive fields such as industry manufacturing, Chemical Manufacture, system oxygen system nitrogen, hygiene medical treatment, electronics, food production, analytical instrument, powder pipeline transport more and more widely, more and more urgent at present to the oil-free air compressor demand.But current oil-free air compressor relatively lacks.Piston reciprocating air compressor more commonly.These machine complex structure component are many, and rate of fault is high, and vibrating noise is big, and operation and maintenance cost are high.Conventional gas production has only tens to be raised to 1.5m
3/ min, type can not satisfy the requirement of discharge capacity.And the nothing of the big air compressor manufacturer development and production of several in recent years families oil double-screw air compressor has just come out soon, and structure is complicated especially, and requirement on machining accuracy is high, so its cost and market price are high, application person is difficult to bear.And oily screw rod machine being arranged because of oil lubrication is arranged, the oil pollution under HTHP makes enterprise at a loss as to what to do, disagrees with the current global energy-saving and emission-reduction of advocating, low-carbon economy etc., can't meet the need of market.
Summary of the invention
According to above deficiency of the prior art; The technical problem that the present invention will solve is: the selflubricating slide plate rotary air compressor that a kind of simple in structure, reliable, slow-speed of revolution, big discharge capacity are provided; Need not lubricant oil, non-carbon-emitting in the pressurized air process, thereby reach the purpose of energy-saving and emission-reduction.
The technical solution adopted for the present invention to solve the technical problems is: a kind of selflubricating slide plate rotary air compressor; Comprise the eccentric cylinder block that is provided with gas-entered passageway and exhaust passage; Be provided with the rotor shaft of band vane slot in the cylinder block, rotor shaft connects drive unit through coupling, and the rotor shaft two ends are installing drive end end cap and the inlet end end cap that has suction port respectively; Suction port is communicated with the gas-entered passageway of cylinder block; The exhaust passage of cylinder block is connected through radiator and with compressed air cylinder, and the cylinder block outer cover is equipped with the cylinder block overcoat, and the two ends of cylinder block and cylinder block overcoat all are connected inlet end end cap and drive end end cap; It is characterized in that: the slide plate group is installed in the vane slot; Each slide plate group has the selflubricating slide plate that ladder presents a theatrical performance as the last item on a programme by two and forms, and two selflubricating slide plates are presented a theatrical performance as the last item on a programme to hand over each other through ladder and pressed and connect the location through elastic connecting device, in the selflubricating slide plate balancing weight are installed.
Wherein, elastic connecting device has following preferred version:
Scheme one: described elastic connecting device comprises guide finger and spring, and spring is installed on the guide finger.
Scheme two: described elastic connecting device is the fluosilicic elastomer.
Described selflubricating slide plate (mixing modification self lubricating materials such as adding graphite fiber, graphite, copper powder, molybdenum disulfide with PEEK and PTFE processes) has very strong self lubricity, high wear resistance and compressive strength and ultralow thermal expansivity.For guaranteeing better tightness, two selflubricating slide plates of slide plate group are presented a theatrical performance as the last item on a programme to hand over each other through ladder and are pressed, and have solved the gas blowby problem of two selflubricating slide plate jointings in the slide plate group, the sealing when more helping ensureing high pressure; For guaranteeing the sealing between the two selflubricating slide plates in selflubricating slide plate and cylinder block, selflubricating slide plate and two end cap (drive end end cap and inlet end end cap) and the slide plate group; Centre at the selflubricating slide plate is bumped into balancing weight; Not only increased intensity but also increased weight; Make the selflubricating slide plate capable of expansion and contraction under action of centrifugal force, guaranteed that the selflubricating slide plate contacts with the sealing of cylinder block; Be provided with elastic connecting device between the two selflubricating slide plates of each slide plate group; Can fix the elastic force that keeps between the selflubricating slide plate; The terminal that makes the selflubricating slide plate all the time with tight contact of end covers at two sides (drive end end cap and inlet end end cap); Can make selflubricating slide plate and two end cap (drive end end cap and inlet end end cap) keep leakproofness, prevent blowby gas between the selflubricating slide plate, also can compensate the wearing and tearing of two end cap (drive end end cap and inlet end end cap) and selflubricating slide plate; Preventing to wear and tear produces the blowby gas that cause in the gap, has played double action.
The joint of described rotor shaft and drive end end cap and inlet end end cap all is provided with the multi-lip seal device.Realize the dry-type encapsulated of rotor shaft and its two ends end cap through the multi-lip seal device.Because rotor shaft rotates under the driving of drive unit (motor or internal-combustion engine); Multi-lip seal device in the two end cap also can be along with wearing and tearing gradually in the increase part of operating time; Thereby cause compressed-air actuated between centers to leak; For the sealing lip that ensures the multi-lip seal device and the sealing of rotor shaft axle journal, can the end cap axis hole of drive end end cap and inlet end end cap be made into 45 ° of annular angle slits, let pressurized air pass through the positive pressure that forms of sealing lip that 45 ° of annular angle slits get into the multi-lip seal devices; With sealing lip tightly be pressed on the rotor shaft axle journal service time that this pressure compensated effect can make the multi-lip seal device nearly double.This system has formed air pressure compensation sealing system by 45 ° of annular angles of end cap axis hole slit, multi-lip seal device working surface and pressure air three parts, has prevented that effectively pressurized air from destroying the lubricating grease of bearing from the bearing of drive end end cap or inlet end end cap entering rotor shaft.
Form the liquid circulation chamber between described cylinder block overcoat and the cylinder block, the liquid circulation chamber connects the cooling liquid spray system, and the mouth spray of cooling liquid spray system is arranged on cylinder block and puts outward.Described cooling liquid spray system is device conventional or that can realize; Mainly comprise input duct, fluid pipeline, recycle pump and condenser, recycle pump is installed on the fluid pipeline, and input duct connects mouth spray; During work; Cooling liquid gets into the liquid circulation chamber from input duct, the heat that cylinder block is produced (comprise air compressor work rotor axle and selflubricating slide plate and the fricative heat of cylinder block, and the heat of air compression generation) cool away; The cooling liquid of being heated is discharged and is forced to squeeze into the condenser cooling repetitive cycling of dispelling the heat again by recycle pump from the fluid pipeline.Through the cooling liquid spray system cylinder block is cooled off, can be guaranteed that air compressor keeps long proper functioning under normal temperature, select for use under the environment that this kind heat radiation methods for cooling can be bad in hot area or room ventilation, temperature is higher.
All be provided with heat radiation grid and vestibule on the inwall of the outside of said cylinder block and cylinder block overcoat, and on the coupling that rotor shaft is connected driven disc be installed, driven disc is provided with cooling fan, and the cooling air wind scooper is set between drive end end cap and the drive unit.The heat radiation grid directly conducts on the heat radiation grid of cylinder block outer casing inner wall the heat that cylinder block produces through the outside; Helping heat in time distributes; In addition, the cooling fan that is arranged on the coupling produces high wind under driving, also can cool off air compressor; Thereby the heat that air compressor is produced is in time discharged, and guarantees to work normally.
The arranged outside filtering noise reduction device of described inlet end end cap.Described filtering noise reduction device is device conventional or that can realize, and the same existing technology of its working principle and process, main purpose are exactly to get into the air-filtering of suction port and reduce noise waiting.
Working principle and process:
When drive unit (motor or internal-combustion engine) rotates; The driving coupling drives rotor shaft rotation formation vacuum and air is drawn onto the gas-entered passageway of cylinder block from suction port; Simultaneously the selflubricating slide plate throws away from the vane slot of rotor shaft and is pressed in the cylinder block inwall closely and forms several air chambers that vary in size, in continuously rotating air chamber from large to small, with air compression to 0.7 to 1.0 MPas; The pressurized air of the cleaning of not having oil molecule fully really is provided; Pressurized air is expressed in the exhaust passage the most at last, and through radiator with pressurized air cooling and be transported in the compressed air cylinder, accomplish the compression work process of oil-free air compressor.The cooling liquid spray system can (comprise air compressor work rotor axle and selflubricating slide plate and the fricative heat of cylinder block with the heat that cylinder block produces; And the heat of air compression generation) cooling in time is to guarantee that air compressor keeps long proper functioning under normal temperature.
The beneficial effect that the present invention had is: a kind of selflubricating slide plate rotary air compressor is provided, has realized oil-free lubrication, energy-saving and emission-reduction through selecting the selflubricating slide plate for use; Two selflubricating slide plates of slide plate group are presented a theatrical performance as the last item on a programme to hand over each other through ladder and are pressed, and have solved the gas blowby problem of two selflubricating slide plate jointings, have guaranteed good sealing property; The centre of selflubricating slide plate is bumped into balancing weight, has not only increased intensity but also increased weight, makes the selflubricating slide plate capable of expansion and contraction under action of centrifugal force, has guaranteed that the selflubricating slide plate contacts with the sealing of cylinder block; The device of elastic connecting device, the terminal that makes the selflubricating slide plate all the time with tight contact of end cap (drive end end cap and inlet end end cap), can compensate the wearing and tearing of two end cap and selflubricating slide plate simultaneously, the blowby gas that cause in the generation gap that prevents to wear and tear; Realize the dry-type encapsulated of rotor shaft and its two ends end cap through the multi-lip seal device, and ensure the sealing lip of multi-lip seal device and the sealing of rotor shaft axle journal through 45 ° of annular angles of end cap axis hole slit; The setting of filtering noise reduction device can get into the air-filtering of suction port and reduce noise waiting; Cooling liquid spray system or air cooling system can (comprise air compressor work rotor axle and selflubricating slide plate and the fricative heat of cylinder block with the heat that cylinder block produces; And the heat of air compression generation) cooling in time is to guarantee that air compressor keeps long proper functioning under normal temperature.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is an A-A sectional view among Fig. 1;
Fig. 3 is the partial enlarged drawing at I position among Fig. 1;
Fig. 4 is the structural representation of slide plate group.
Among the figure: 1, inlet end end cap; 2, suction port; 3, slide plate group; 4, rotor shaft; 5, cylinder block; 6, cylinder block overcoat; 7, exhaust passage; 8, liquid circulation chamber; 9, mouth spray; 10, input duct; 11, drive end end cap; 12, coupling; 13, cooling air wind scooper; 14, drive unit; 15, cooling fan; 16, radiator; 17, compressed air cylinder; 18, fluid pipeline; 19, recycle pump; 20, balancing weight; 21, filtering noise reduction device; 22, selflubricating slide plate; 23, guide finger; 24, spring; 25, ladder is presented a theatrical performance as the last item on a programme; 26, condenser
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done and to be further described:
Shown in Fig. 1～4; Selflubricating slide plate rotary air compressor comprises the eccentric cylinder block 5 that is provided with gas-entered passageway and exhaust passage 7, is provided with the rotor shaft 4 of band vane slot in the cylinder block 5; Rotor shaft 4 connects drive unit 14 through coupling 12; Rotor shaft 4 two ends are installing drive end end cap 11 and the inlet end end cap 1 that has suction port 2 respectively, and suction port 2 is communicated with the gas-entered passageway of cylinder block 5, and the exhaust passage 7 of cylinder block 5 is connected through radiator 16 and with compressed air cylinder 17; Cylinder block 5 outer cover are equipped with cylinder block overcoat 6; The two ends of cylinder block 5 and cylinder block overcoat 6 all are connected inlet end end cap 1 and drive end end cap 11, and slide plate group 3 is installed in the described vane slot, and each slide plate group 3 has present a theatrical performance as the last item on a programme 25 selflubricating slide plate 22 of ladder by two and forms; Two selflubricating slide plates 22 are presented a theatrical performance as the last item on a programme through ladder and 25 are each other handed over and press and connect the location through elastic connecting device, and balancing weight 20 is installed in the selflubricating slide plate 22.
Wherein, elastic connecting device has following preferred version:
Scheme one: described elastic connecting device comprises guide finger 23 and spring 24, and spring 24 is installed on the guide finger 23, and is as shown in Figure 3.
Scheme two: described elastic connecting device is the fluosilicic elastomer.
Described selflubricating slide plate 22 (mixing modification self lubricating materials such as adding graphite fiber, graphite, copper powder, molybdenum disulfide with PEEK and PTFE processes) has very strong self lubricity, high wear resistance and compressive strength and ultralow thermal expansivity.For guaranteeing better tightness, two selflubricating slide plates 22 of slide plate group 3 are presented a theatrical performance as the last item on a programme through ladder and 25 are handed over each other and press, and have solved the gas blowby problem of two selflubricating slide plates, 22 jointings in the slide plate group 3, the sealing when more helping ensureing high pressure; For guaranteeing the sealing between the two selflubricating slide plates 22 in selflubricating slide plate 22 and cylinder block 5, selflubricating slide plate 22 and two end cap (drive end end cap 11 and inlet end end cap 1) and the slide plate group 3; Be bumped into balancing weight 20 in the centre of selflubricating slide plate 22; Not only increased intensity but also increased weight; Make selflubricating slide plate 22 capable of expansion and contraction under action of centrifugal force, guaranteed that selflubricating slide plate 22 contacts with the sealing of cylinder block 5; Be provided with elastic connecting device between the two selflubricating slide plates 22 of each slide plate group 3; Can fix the elastic force that keeps between the selflubricating slide plate 33; The terminal that makes selflubricating slide plate 22 all the time with tight contact of end covers at two sides (drive end end cap 11 and inlet end end cap 1); Can make selflubricating slide plate 22 and two end cap (drive end end cap 11 and inlet end end cap 1) keep leakproofness, prevent blowby gas between the selflubricating slide plate 22, also can compensate the wearing and tearing of two end cap (drive end end cap 11 and inlet end end cap 1) and selflubricating slide plate 22; Preventing to wear and tear produces the blowby gas that cause in the gap, has played double action.
Described rotor shaft 4 all is provided with the multi-lip seal device with the joint of drive end end cap 11 and inlet end end cap 1.Realize the dry-type encapsulated of rotor shaft and its two ends end cap through the multi-lip seal device.Because rotor shaft 4 rotates under the driving of drive unit 14 (motor or internal-combustion engine); Multi-lip seal device in the two end cap also can be along with wearing and tearing gradually in the increase part of operating time; Thereby cause compressed-air actuated between centers to leak; For the sealing lip that ensures the multi-lip seal device and the sealing of rotor shaft axle journal, can the end cap axis hole of drive end end cap and inlet end end cap be made into 45 ° of annular angle slits, let pressurized air pass through the positive pressure that forms of sealing lip that 45 ° of annular angle slits get into the multi-lip seal devices; With sealing lip tightly be pressed on the rotor shaft axle journal service time that this pressure compensated effect can make the multi-lip seal device nearly double.This system has formed air pressure compensation sealing system by 45 ° of annular angles of end cap axis hole slit, multi-lip seal device working surface and pressure air three parts, has prevented that effectively pressurized air from destroying the lubricating grease of bearing from the bearing of drive end end cap or inlet end end cap entering rotor shaft.
Form liquid circulation chamber 8 between described cylinder block overcoat 6 and the cylinder block 5, liquid circulation chamber 8 connects the cooling liquid spray system, and the mouth spray 9 of cooling liquid spray system is arranged on the cylinder block overcoat 6.Described cooling liquid spray system is device conventional or that can realize; Mainly comprise input duct 10, fluid pipeline 18, recycle pump 19 and condenser 26, recycle pump 19 is installed on the fluid pipeline 18, and input duct 10 connects mouth spray 9; During work; Cooling liquid gets into the liquid circulation chambeies 8 from input duct 10, the heat that cylinder block 5 is produced (comprise air compressor work rotor axle and selflubricating slide plate and the fricative heat of cylinder block, and the heat of air compression generation) cool away; The cooling liquid of being heated is discharged and is forced to squeeze into the condenser 26 the cooling repetitive cycling of dispelling the heat again by recycle pump 19 from fluid pipeline 18.Through the cooling liquid spray system cylinder block 5 is cooled off, can be guaranteed that air compressor keeps long proper functioning under normal temperature, select for use under the environment that this kind heat radiation methods for cooling can be bad in hot area or room ventilation, temperature is higher.
All be provided with heat radiation grid and vestibule on the inwall of the outside of said cylinder block 5 and cylinder block overcoat 6; With on the coupling 12 that rotor shaft 4 is connected driven disc is installed; Driven disc is provided with cooling fan 15, between drive end end cap 11 and the drive unit 14 cooling air wind scooper 13 is set.The heat radiation grid directly conducts on the heat radiation grid of cylinder block outer casing inner wall the heat that cylinder block 5 produces through the outside; Helping heat in time distributes; In addition, the cooling fan 15 that is arranged on the coupling 12 produces high wind under driving, also can cool off air compressor; Thereby the heat that air compressor is produced is in time discharged, and guarantees to work normally.
The arranged outside filtering noise reduction device 21 of described inlet end end cap 1.Described filtering noise reduction device 21 is device conventional or that can realize, and the same existing technology of its working principle and process, main purpose are exactly to get into the air-filtering of suction port 2 and reduce noise waiting.
Working principle and process:
When drive unit 14 (motor or internal-combustion engine) rotates; Driving coupling 12 drives rotor shafts 4 rotation formation vacuum and air is drawn onto the gas-entered passageway of cylinder block 5 from suction port 2; The slide plate 22 of selflubricating simultaneously throws away from the vane slot of rotor shaft 4 and is pressed in several air chambers that vary in size of cylinder block 5 inwalls formation closely; Air chamber from large to small in continuously rotating; To 1.0 MPas, the pressurized air of the cleaning of not having oil molecule fully is provided really with air compression to 0.7, pressurized air is expressed in the exhaust passage 7 the most at last; And through radiator 16 with pressurized air cooling and be transported in the compressed air cylinder 17, accomplish the compression work process of oil-free air compressor.The cooling liquid spray system can (comprise air compressor work rotor axle and selflubricating slide plate and the fricative heat of cylinder block with the heat that cylinder block 5 produces; And the heat of air compression generation) cooling in time is to guarantee that air compressor keeps long proper functioning under normal temperature.
Claims (7)
1. selflubricating slide plate rotary air compressor; Comprise the eccentric cylinder block that is provided with gas-entered passageway and exhaust passage; Be provided with the rotor shaft of band vane slot in the cylinder block, rotor shaft connects drive unit through coupling, and the rotor shaft two ends are installing drive end end cap and the inlet end end cap that has suction port respectively; Suction port is communicated with the gas-entered passageway of cylinder block; The exhaust passage of cylinder block is connected through radiator and with compressed air cylinder, and the cylinder block outer cover is equipped with the cylinder block overcoat, and the two ends of cylinder block and cylinder block overcoat all are connected inlet end end cap and drive end end cap; It is characterized in that: the slide plate group is installed in the vane slot; Each slide plate group has the selflubricating slide plate that ladder presents a theatrical performance as the last item on a programme by two and forms, and two selflubricating slide plates are presented a theatrical performance as the last item on a programme to hand over each other through ladder and pressed and connect the location through elastic connecting device, in the selflubricating slide plate balancing weight are installed.
2. selflubricating slide plate rotary air compressor according to claim 1, it is characterized in that: described elastic connecting device comprises guide finger and spring, and spring is installed on the guide finger.
3. selflubricating slide plate rotary air compressor according to claim 1 is characterized in that: described elastic connecting device is the fluosilicic elastomer.
4. selflubricating slide plate rotary air compressor according to claim 1 is characterized in that: the arranged outside filtering noise reduction device of described inlet end end cap.
5. selflubricating slide plate rotary air compressor according to claim 1 is characterized in that: the joint of described rotor shaft and drive end end cap and inlet end end cap all is provided with the multi-lip seal device.
6. selflubricating slide plate rotary air compressor according to claim 1; It is characterized in that: form the liquid circulation chamber between described cylinder block overcoat and the cylinder block; The liquid circulation chamber connects the cooling liquid spray system, and the mouth spray of cooling liquid spray system is arranged on cylinder block and puts outward.
7. according to claim 1 or 6 described selflubricating slide plate rotary air compressors; It is characterized in that: all be provided with heat radiation grid and vestibule on the inwall of the outside of said cylinder block and cylinder block overcoat; With on the coupling that rotor shaft is connected driven disc is installed; Driven disc is provided with cooling fan, and the cooling air wind scooper is set between drive end end cap and the drive unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110065800A CN102094820B (en) | 2011-03-18 | 2011-03-18 | Self-lubricating slip sheet rotary air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110065800A CN102094820B (en) | 2011-03-18 | 2011-03-18 | Self-lubricating slip sheet rotary air compressor |
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| Publication Number | Publication Date |
|---|---|
| CN102094820A CN102094820A (en) | 2011-06-15 |
| CN102094820B true CN102094820B (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110065800A Expired - Fee Related CN102094820B (en) | 2011-03-18 | 2011-03-18 | Self-lubricating slip sheet rotary air compressor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128979Y (en) * | 1991-09-15 | 1993-03-31 | 左志杰 | Air-compressor with oilless slide paddle |
| US5544496A (en) * | 1994-07-15 | 1996-08-13 | Delaware Capital Formation, Inc. | Refrigeration system and pump therefor |
| CN1424509A (en) * | 2003-01-08 | 2003-06-18 | 延边利源通用机械有限责任公司 | Rolling sliding vane air compressor without oil lubrication |
| CN201206552Y (en) * | 2008-04-11 | 2009-03-11 | 常州市永盾机械有限公司 | Self-lubricating vacuum pressure combination air pump |
| CN201982298U (en) * | 2011-03-18 | 2011-09-21 | 张润国 | Rotary air compressor of self-lubricating slip sheet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005273506A (en) * | 2004-03-24 | 2005-10-06 | Matsushita Electric Ind Co Ltd | Vane rotary vacuum-pump |
| JP2006017024A (en) * | 2004-07-01 | 2006-01-19 | Matsushita Electric Ind Co Ltd | Vane rotary air pump |
-
2011
- 2011-03-18 CN CN201110065800A patent/CN102094820B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128979Y (en) * | 1991-09-15 | 1993-03-31 | 左志杰 | Air-compressor with oilless slide paddle |
| US5544496A (en) * | 1994-07-15 | 1996-08-13 | Delaware Capital Formation, Inc. | Refrigeration system and pump therefor |
| CN1424509A (en) * | 2003-01-08 | 2003-06-18 | 延边利源通用机械有限责任公司 | Rolling sliding vane air compressor without oil lubrication |
| CN201206552Y (en) * | 2008-04-11 | 2009-03-11 | 常州市永盾机械有限公司 | Self-lubricating vacuum pressure combination air pump |
| CN201982298U (en) * | 2011-03-18 | 2011-09-21 | 张润国 | Rotary air compressor of self-lubricating slip sheet |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2005-273506A 2005.10.06 |
| JP特开2006-17024A 2006.01.19 |
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| CN102094820A (en) | 2011-06-15 |
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Granted publication date: 20120926 |