CN101725379B - Static pressure air-bearing composite shaft and working mode thereof - Google Patents
Static pressure air-bearing composite shaft and working mode thereof Download PDFInfo
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- CN101725379B CN101725379B CN2009102254656A CN200910225465A CN101725379B CN 101725379 B CN101725379 B CN 101725379B CN 2009102254656 A CN2009102254656 A CN 2009102254656A CN 200910225465 A CN200910225465 A CN 200910225465A CN 101725379 B CN101725379 B CN 101725379B
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- air
- bearing
- main shaft
- bearing shafts
- nozzle body
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention belongs to the technical field of pressure-feed air bearings and high-speed bearings and relates to a static pressure air-bearing composite shaft. The static pressure air-bearing composite shaft is provided with a mainshaft (4), high-speed bearings (1) and an air-bearing shaft sleeve (2); the mainshaft (4) is supported by two high-speed bearings (1) and is arranged inside the air-bearing shaft sleeve (2); the mainshaft (4) and an inner ring of the bearing are in force fit; an outer ring of the bearing and an inner wall of the air-bearing shaft sleeve are in force fit to form an air-bearing shaft; a nozzle body (5) is arranged inside a composite shaft sleeve (6); the air-bearing shaft is arranged inside the nozzle body (5) of the composite shaft; a clearance is kept between the air-bearing shaft and the nozzle body; one end of the mainshaft (4) is provided with power configuration for driving the mainshaft to rotate; the other end of the mainshaft (4) is provided with an impeller (8) which is positioned inside a compressed air cavity (12) and coaxial with the mainshaft; and two exhaust ports of the compressed air cavity (12) are communicated with a nozzle (11) and a combustion chamber of an engine or a dynamo respectively. The static pressure air-bearing composite shaft has the characteristics of low friction, high rotational speed, low power consumption, high precision, good stability and the like.
Description
Technical field
The invention belongs to pressure-feed air bearing, high-speed bearing technical field, be specifically related to a kind of static pressure air-bearing composite shaft and working method, be mainly used in industries such as turbosupercharger, gas engine, gas electricity generator, hydrogen fuel cell.
Technical background
Pressure-feed air bearing is one of common form of gas bearing, pressure-feed air bearing is because advantages such as running speed height, rotating accuracy height, lubricated clean environmental protection are widely used in fields such as precision machining industry, low temperature compression industry, food industry, medical and health industry, nuclear industry, Aero-Space gradually.But during the pressure-feed air bearing operation one special-purpose compressed gas source must be arranged, stop the supple of gas or steam in case source of the gas breaks down, pressure-feed air bearing will thoroughly damage.When pressure-feed air bearing starts, must open compressed gas source earlier, when reaching certain value, pressure just can start.When pressure-feed air bearing quit work, source of the gas must time-delay closing.The requirement of this harshness makes uses pressure-feed air bearing to be greatly limited at special occasions.
High-speed bearing is used very extensive, as electric main shaft industry.But high-speed bearing is had relatively high expectations to Environmental Conditions, as lubricated, cooling etc.Greatest drawback is can not long-term work, and the life-span is limited.
In industries such as turbosupercharger, gas engine, gas electricity generator, hydrogen fuel cells, be badly in need of a kind of transmission shaft at present, hope possesses the advantage of pressure-feed air bearing or possesses the advantage of high-speed bearing, but does not have the harshness restriction of above service condition simultaneously again.Because the use occasion condition is limited, so can not satisfy the service condition of pressure-feed air bearing or high-speed bearing again.Designed a kind of static pressure air-bearing composite shaft for addressing these problems us, this composite shaft timesharing has utilized the advantage of pressure-feed air bearing and high-speed bearing, has avoided the shortcoming of pressure-feed air bearing and high-speed bearing again.This project is the independent research product.
Summary of the invention
The objective of the invention is to propose a kind of static pressure air-bearing composite shaft and working method, but the advantage that makes the static pressure air-bearing composite shaft structure that proposed and working method timesharing utilize pressure-feed air bearing and high-speed bearing, and can avoid the shortcoming of pressure-feed air bearing and high-speed bearing.
To achieve the above object of the invention, the technical solution used in the present invention is:
A kind of static pressure air-bearing composite shaft has main shaft, high-speed bearing and air-bearing shafts axle sleeve; Main shaft is supported by two high-speed bearings and is installed in the air-bearing shafts axle sleeve, main shaft and bearing inner race compression fit, and bearing outer ring and air-bearing shafts sleeve lining compression fit constitute the air-bearing shafts structure; Two ends at air-bearing shafts are provided with end cap, in order to the air-bearing shafts end face is played the thrust effect; Nozzle body is press-fitted and is installed in the composite shaft axle sleeve, and air-bearing shafts is installed in the nozzle body of composite shaft, has certain clearance between the two; When not having pressurized air, air-bearing shafts directly contacts with nozzle body, when pressurized air reached certain air pressure, air-bearing shafts was in state of suspension in nozzle body: the end at main shaft is provided with the power setting that drive main spindle is rotated, and the other end of main shaft is provided with the impeller coaxial with main shaft; Described impeller is positioned at the chamber of calming the anger, and the chamber of calming the anger has a source of the gas to export to nozzle on the nozzle body, is used for providing pressurized air to the suspension of air-bearing shafts; Be provided with pressure check valve in the described chamber of calming the anger, when pressure reached certain value, beginning was supplied gas to the firing chamber of motor or gas engine; Be that the described chamber of calming the anger has two relief openings, one of them relief opening with provide compressed-air actuated distribution chamber to be communicated with for a plurality of nozzles, provide pressurized air with the suspension rotation of thinking air-bearing shafts; Another relief opening is communicated with the firing chamber of motor or gas electricity generator, for the firing chamber of motor or gas electricity generator provides pressurized air.
Constitute compressed-air actuated distribution chamber between described nozzle body and the composite shaft axle sleeve, a plurality of nozzle inlet ends on the nozzle body are communicated with compressed-air actuated distribution chamber, outlet end is communicated with gap between air-bearing shafts axle sleeve, the nozzle body, for the suspension of air-bearing shafts provides pressurized air.
The described power setting that is arranged on main shaft one end drive main spindle rotation can be motor, gear formation or motor, belt wheel, driving belt constitutes, also can be in an end setting of main shaft by gas-powered, the turbine coaxial with main shaft.
The working method of static pressure air-bearing composite shaft of the present invention is: startup and motion are initial, and the dynamic action of drive main spindle rotation is in main shaft, by high-speed bearing supports main shaft high speed rotating; Do relative movement between main shaft and high-speed bearing and the air-bearing shafts axle sleeve: produce air-flow with the coaxial impeller of main shaft and collect by the chamber of calming the anger deposit generation pressurized gas by a plurality of nozzle acts on the nozzle body in air-bearing shafts, make air-bearing shafts in nozzle body, be in state of suspension, high-speed bearing, air-bearing shafts axle sleeve are with the rotation of main shaft consubstantiality, and be in relative static conditions between main shaft and high-speed bearing, the air-bearing shafts axle sleeve at this moment: air-bearing shafts is in the working state of pressure-feed air bearing; When the pressure of the intracavity gas of calming the anger reached certain value, beginning provided pressurized air to the firing chamber of motor or gas electricity generator; The driving power of main shaft is closed, and when compressed-air actuated pressure was lower than certain value, pressure check valve was closed automatically, and stopping to provide pressurized air to the firing chamber of motor or gas electricity generator; Reduce gradually with the gas pressure in the chamber of calming the anger, air-bearing shafts reverts to the motion original state gradually by state of suspension, contacts with nozzle body, and the inertia energy of main shaft continues rotation under high-speed bearing supports, up to stopping fully.
The present invention adopts above technological scheme, has following beneficial effect:
(1) steady-working state has the advantage of pressure-feed air bearing, promptly low friction, low power consumption, highi degree of accuracy, good stability etc.
Supported by high-speed bearing when (2) main shaft of air-bearing composite shaft starts, starting torque is little and be easy to start.
Support by high-speed bearing when (3) air-bearing composite shaft starts, can not damage air-bearing shafts during startup.
(4) disappear when driving power, after air supporting pressure reduced gradually, air-bearing shafts quit work, and the inertia energy of main shaft drives high-speed bearing and continues rotation, up to stopping fully.Can not damage air-bearing shafts.
(5) the end face thrust bearing is equipped with at the air-bearing composite shaft two ends, can effectively prevent the main shaft axial float.
Description of drawings
Fig. 1 is the structural representation of air-bearing shafts among the present invention.
Fig. 2 is the structural representation of static pressure air-bearing composite shaft of the present invention.
Fig. 3 is the component diagram of air-bearing shafts in the invention.
Fig. 4 is the component diagram of air-bearing shafts axle sleeve in the invention.
Fig. 5 is the component diagram of invention static pressure air-bearing composite shaft.
Among the figure: 1, high-speed bearing, 2, the air-bearing shafts axle sleeve, 3, end cap, 4, main shaft, 5, nozzle body, 6, composite shaft axle sleeve, 7, turbine, 8, impeller, 9, shell, 10, anti-silk nut, 11, nozzle, 12, the chamber of calming the anger, 13, pressure check valve, 14, suction port, 15,16, relief opening.
Embodiment
With specific embodiment the present invention is illustrated in conjunction with the accompanying drawings, but does not constitute any limitation of the invention:
As shown in Figure 1 and Figure 2, and with reference to Fig. 3, Fig. 4, Fig. 5, a kind of static pressure air-bearing composite shaft has main shaft 4, high-speed bearing 1 and air-bearing shafts axle sleeve 2; Described main shaft 4 is supported by two high-speed bearings 1 and is installed in the air-bearing shafts axle sleeve 2, the inner ring compression fit of main shaft 4 and two high-speed bearings, and the outer ring of two high-speed bearings and air-bearing shafts sleeve lining compression fit constitute air-bearing shafts; Be provided with in order to the air-bearing shafts end face is played the end cap 3 of thrust effect at the two ends of air supporting axle sleeve 2; Described air supporting axle sleeve 2 is positioned at nozzle body 5, and and nozzle body 5 between have small gap; Described nozzle body 5 is positioned at composite shaft axle sleeve 6, constitute compressed-air actuated distribution chamber between described nozzle body 5 and the composite shaft axle sleeve 6, a plurality of nozzles on the nozzle body are communicated with compressed-air actuated distribution chamber, and be communicated with gap between air-bearing shafts axle sleeve 2, the nozzle body 5, for the suspension of air-bearing shafts provides pressurized air.When not having pressurized air, air-bearing shafts directly contacts with nozzle body 5, and when pressurized air reaches certain air pressure, air-bearing shafts is in state of suspension in nozzle body; Described composite shaft axle sleeve 6 is positioned at shell 9; End at main shaft 4 is provided with the turbine coaxial with it 7, and the other end of main shaft is provided with the chamber 12 of calming the anger, and calm the anger chamber 12 and shell 9 are connected as a single entity by screw; In the chamber 12 of calming the anger, have the impeller 8 coaxial with main shaft, the chamber 11 of calming the anger has two relief openings, the source of the gas that one of them relief opening 16 is discharged is defeated by nozzle body 5 by the suction port 14 that is positioned at the shell upper end with source of the gas, is used for giving air-bearing shafts 2 air feed by a plurality of nozzles 11; Another relief opening 15 is communicated with the firing chamber of motor or generator, is provided with pressure check valve 13 in the relief opening 15, and when pressure reached certain value, beginning was supplied gas to the firing chamber of motor or generator.
The working method of static pressure air-bearing composite shaft of the present invention is: startup and motion are initial, and the dynamic action of drive main spindle rotation is in main shaft 4, by high-speed bearing 1 supports main shaft high speed rotating; Do relative movement between main shaft 4 and high-speed bearing 1, the air-bearing shafts axle sleeve 2: produce air-flows and act on air-bearing shafts by a plurality of nozzles 11 on the nozzle body by the pressurized gas that chamber 12 collection of calming the anger are deposited generation with the coaxial impeller of main shaft 8, make air-bearing shafts in nozzle body, be in state of suspension, high-speed bearing 1, air-bearing shafts axle sleeve 2 are with the rotation of main shaft 4 consubstantialities, and be in relative static conditions between main shaft 4 and high-speed bearing 1, the air-bearing shafts axle sleeve 2 at this moment: air-bearing shafts is in the working state of pressure-feed air bearing; When the pressure of the intracavity gas of calming the anger reached certain value, beginning provided pressurized air to the firing chamber of motor or generator; When quitting work, the driving power of main shaft is closed, and when compressed-air actuated pressure was lower than certain value, pressure check valve 13 was closed, and stops to provide pressurized air to the firing chamber of motor or generator; Reduce gradually with the gas pressure in the chamber of calming the anger, air-bearing shafts reverts to the motion original state gradually by state of suspension, contacts with nozzle body 5, and the inertia energy of main shaft 4 continues rotation under high-speed bearing 1 supports, up to stopping fully.
Is that example explanation working principle is as follows with the turbosupercharger: behind the automotive ignition, motor will continue to discharge the tail gas after the burning, and vehicle exhaust is as starting power source, start main shaft 4 by blowing with the coaxial turbine of main shaft, and main shaft 4 supports rotation by high-speed bearing 1.Main shaft 4 drives impeller 8 work of the other end, when impeller 8 continues rotation, will produce pressurized air in the cavity of calming the anger.When compressed air pressure reached certain value, air-bearing shafts was in state of suspension in nozzle body; High-speed bearing, air-bearing shafts axle sleeve are in relative static conditions between main shaft and high-speed bearing, the air-bearing shafts axle sleeve at this moment with the rotation of main shaft consubstantiality: the gas part in the chamber of calming the anger is supplied with air-bearing shafts, another part supply engine; Under the drive of vehicle exhaust, impeller just can continue rotation, for motor provides pressurized air endlessly like this.
Claims (4)
1. a static pressure air-bearing composite shaft is characterized in that: have main shaft (4), high-speed bearing (1) and air-bearing shafts axle sleeve (2); Main shaft (4) is supported by two high-speed bearings (1) and is installed in the air-bearing shafts axle sleeve (2), main shaft (4) and bearing inner race compression fit, and bearing outer ring and air-bearing shafts sleeve lining compression fit constitute the air-bearing shafts structure; Be provided with end cap (3) at the two ends of air-bearing shafts, in order to the air-bearing shafts end face is played the thrust effect; Nozzle body (5) is press-fitted and is installed in the composite shaft axle sleeve (6), and air-bearing shafts is installed in the nozzle body (5) of composite shaft, has certain clearance between the two; When not having pressurized air, air-bearing shafts directly contacts with nozzle body, when pressurized air reaches certain air pressure, air-bearing shafts is in state of suspension in nozzle body: the end at main shaft (4) is provided with the power setting that drive main spindle is rotated, and the other end of main shaft (4) is provided with the impeller coaxial with main shaft (8); Described impeller (8) is positioned at the chamber of calming the anger (12), and the chamber of calming the anger (12) have a source of the gas to export to nozzle on the nozzle body, are used for providing pressurized air to the suspension of air-bearing shafts; Be provided with pressure check valve (13) in the described chamber of calming the anger, when pressure reached certain value, beginning was supplied gas to the firing chamber of motor or generator; Be that the described chamber of calming the anger (12) has two relief openings, one of them relief opening with provide compressed-air actuated distribution chamber to be communicated with for a plurality of nozzles (11), provide pressurized air with the suspension rotation of thinking air-bearing shafts; Another relief opening is communicated with the firing chamber of motor or generator, for the firing chamber of motor or generator provides pressurized air.
2. static pressure air-bearing composite shaft according to claim 1, it is characterized in that: described compressed-air actuated distribution chamber is positioned between nozzle body (5) and the composite shaft axle sleeve (6), its inlet end of a plurality of nozzles (11) on the nozzle body (5) is communicated with compressed-air actuated distribution chamber, outlet end is communicated with gap between air-bearing shafts axle sleeve (2), the nozzle body (5), for the suspension of air-bearing shafts provides pressurized air.
3. static pressure air-bearing composite shaft according to claim 1 is characterized in that: the described power setting that is arranged on main shaft one end drive main spindle rotation is motor, gear formation or motor, belt wheel, driving belt constitutes or in an end setting of main shaft by gas-powered, the turbine coaxial with main shaft.
4. static pressure air-bearing composite shaft according to claim 1, it is characterized in that: startup and motion are initial, the dynamic action of drive main spindle rotation is in main shaft (4), by high-speed bearing (1) supports main shaft high speed rotating, main shaft (4) and high-speed bearing (1), air-bearing shafts axle sleeve are done relative movement between (2); The impeller coaxial with main shaft (8) produces air-flow and collects the pressurized gas of depositing generation by the chamber of calming the anger (12) and act on air-bearing shafts by a plurality of nozzles (11) on the nozzle body, make air-bearing shafts in nozzle body, be in state of suspension, high-speed bearing (1), air-bearing shafts axle sleeve (2) are with the rotation of main shaft (4) consubstantiality, and be in relative static conditions between main shaft (4) and high-speed bearing (1), the air-bearing shafts axle sleeve (2) at this moment: air-bearing shafts is in the working state of pressure-feed air bearing; When the pressure of the intracavity gas of calming the anger reached certain value, beginning provided pressurized air to the firing chamber of motor or gas electricity generator; The driving power of main shaft is closed, and when compressed-air actuated pressure was lower than certain value, pressure check valve (13) was closed, and stops to provide pressurized air to the firing chamber of motor or generator; Reduce gradually with the gas pressure in the chamber of calming the anger, air-bearing shafts reverts to the motion original state gradually by state of suspension, contacts with nozzle body (5), and the inertia energy of main shaft continues rotation under high-speed bearing supports, up to stopping fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102254656A CN101725379B (en) | 2009-12-14 | 2009-12-14 | Static pressure air-bearing composite shaft and working mode thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102254656A CN101725379B (en) | 2009-12-14 | 2009-12-14 | Static pressure air-bearing composite shaft and working mode thereof |
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| Publication Number | Publication Date |
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| CN101725379A CN101725379A (en) | 2010-06-09 |
| CN101725379B true CN101725379B (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102254656A Expired - Fee Related CN101725379B (en) | 2009-12-14 | 2009-12-14 | Static pressure air-bearing composite shaft and working mode thereof |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102476315B (en) * | 2010-11-25 | 2015-11-25 | 北京中电科电子装备有限公司 | The guard method of air static pressure electric spindle and device, cutting machine |
| CN104533956B (en) * | 2015-01-22 | 2017-02-22 | 哈尔滨工业大学 | Active compensation type low-swirl shaft-driven air bearing |
| CN105673692A (en) * | 2016-04-13 | 2016-06-15 | 中国船舶重工集团公司第七0四研究所 | Static air bearing nozzle |
| CN107514421B (en) * | 2017-09-08 | 2023-10-20 | 深圳市俊凯达科技有限公司 | Transmission shaft and application thereof |
| CN107465292B (en) * | 2017-09-08 | 2024-01-23 | 深圳市俊凯达科技有限公司 | Air-float generator and motor |
| JP2019154176A (en) * | 2018-03-05 | 2019-09-12 | 本田技研工業株式会社 | Fuel cell vehicle |
| CN112727927B (en) * | 2020-12-28 | 2021-11-02 | 北京理工大学 | Air bearing for air compressor of fuel cell system |
Citations (4)
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|---|---|---|---|---|
| CN2803580Y (en) * | 2005-05-27 | 2006-08-09 | 汤秀清 | High speed airfloat electric manshaft |
| CN1974085A (en) * | 2006-12-18 | 2007-06-06 | 汤秀清 | Air floated high speed electric mandrel |
| CN201013754Y (en) * | 2007-03-03 | 2008-01-30 | 大连海事大学 | Curved face gradually expansion type air-intake static pressure air-float antithrust bearing |
| CN201560811U (en) * | 2009-12-14 | 2010-08-25 | 洛阳恒锐测控科技有限公司 | Hydrostatic air-bearing composite shaft |
-
2009
- 2009-12-14 CN CN2009102254656A patent/CN101725379B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2803580Y (en) * | 2005-05-27 | 2006-08-09 | 汤秀清 | High speed airfloat electric manshaft |
| CN1974085A (en) * | 2006-12-18 | 2007-06-06 | 汤秀清 | Air floated high speed electric mandrel |
| CN201013754Y (en) * | 2007-03-03 | 2008-01-30 | 大连海事大学 | Curved face gradually expansion type air-intake static pressure air-float antithrust bearing |
| CN201560811U (en) * | 2009-12-14 | 2010-08-25 | 洛阳恒锐测控科技有限公司 | Hydrostatic air-bearing composite shaft |
Non-Patent Citations (2)
| Title |
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| JP特开2004-60833A 2004.02.26 |
| JP特开2008-39109A 2008.02.21 |
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