CN105822660A - High-pressure-area-coupled groove type refrigerant dynamic pressure fluid oil-free lubrication bearing pair - Google Patents
High-pressure-area-coupled groove type refrigerant dynamic pressure fluid oil-free lubrication bearing pair Download PDFInfo
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- CN105822660A CN105822660A CN201610286289.7A CN201610286289A CN105822660A CN 105822660 A CN105822660 A CN 105822660A CN 201610286289 A CN201610286289 A CN 201610286289A CN 105822660 A CN105822660 A CN 105822660A
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- bearing
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
- F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
- F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
Abstract
The invention discloses a high-pressure-area-coupled groove type refrigerant dynamic pressure fluid oil-free lubrication bearing pair. A radial bearing cylindrical face and a thrust bearing circular ring face are distributed on a bearing base. A cylindrical face and a circular ring face are distributed on a main shaft. The radial cylindrical face of the bearing base and the cylindrical face on the main shaft form a radial friction pair. The thrust circular ring face of the bearing base and the circular ring face on the main shaft form a thrust friction pair. Molded line slots are machined in the radial friction pair and the thrust friction pair. Four different arrangement manners are achieved for machining of the molded line slots. By means of the high-pressure-area-coupled groove type refrigerant dynamic pressure fluid oil-free lubrication bearing pair, loads in the axial direction and the radial direction can be provided for a bearing, a high-pressure area is commonly used by the radial friction pair and the thrust friction pair, the dynamic pressure of a fluid lubricating film in a bearing cavity is effectively improved, and the angular rigidity and stability of the bearing are improved; and a pressure control exhaust hole can be used for pressure adjusting or liquid/gas/heat discharging or impurity removing or pressure measuring or the like, and the stability and the reliability of the bearing can be better improved.
Description
Technical field
The invention belongs to the hydrodynamic bearing field in Machine Design, the slot type cold-producing medium dynamic pressure fluid Nonlubricated bearing coupled particularly to a kind of higher-pressure region is secondary, it is that one is applicable to low viscosity, low boiling fluid lubrication hydrodynamic bearing, by higher-pressure region and the higher-pressure region coupling of thrust carrying friction pair of radially carrying friction pair, there is higher radial and thrust bearing capacity and stability, and negative pressure can be suppressed to cavitate.
Background technology
The power part of conventional refrigerants fluid circulation system uses oil base lubricant medium, due to lubricating oil and the blending of process fluid low boiling point refrigerant, lubricating oil is carried under one's arms into vaporizer and condenser by cold-producing medium, lubricating oil separates out in vaporizer and is attached to heat exchanger surface, add heat exchange thermal resistance, the lubricating oil viscosity being easily caused during cold-producing medium is present in lubricating oil simultaneously in compressor or other relative movement parts declines, bearing capacity reduces and causes the generation of dry friction, it is seen that lubricating oil can produce more negative effect to refrigeration system with blending of cold-producing medium.It addition, along with the employing of novel environment friendly refrigeration working medium, pollute environment to prevent low boiling point refrigerant from revealing, and keep the degree of purity of working media in refrigeration system, the sealing of refrigeration system is had higher requirement.Therefore, requiring that higher occasion, the application of conventional oil base lubrication technology have certain limitation in refrigerant quality, the exploitation of Nonlubricated bearing and development have become the key of power-equipment stable and high effective operation.
According to the generation type of bearing capacity, fluid lubrication can be divided into hydrostatic lubrication and hydrodynamic lubrication two ways.Wherein, hydrodynamic bearing relies on two rubbing surface relative motioies to make viscous fluid form dynamic pressure in shrinking wedge gap, is separated by two friction surfaces and bears load.Relative to conventional oil base lubricant medium, cold-producing medium has less viscosity, and therefore under identical rotating speed, its bearing capacity is relatively low.And, in the dynamical pressure radial bearing run up, there is certain negative pressure region on rear side of minimum pressure film, cavitation easily occurs when lubricating fluid bears relatively high-tensile strength in negative pressure region, the runnability of bearing can be produced certain impact.When using cold-producing medium as lubricant medium, owing to the cold-producing medium in power set has less degree of supercooling and relatively low boiling point, during the transient state start/stop and stable operation of bearing, substantial amounts of frictional heat can be produced in Bearing inner high speed shear minim gap, cold-producing medium is as the effect also while lubricant medium with cooling medium, frictional heat in bearing can be taken away by the phase transformation of self, low boiling lubricant easily undergoes phase transition gasification after absorbing heat.It is easier to cause cavitation cavitation erosion compared to oil base lubricant medium oil-free low boiling lubricant lubrication, therefore in the design of oil-free low boiling lubricant hydrodynamic lubrication bearing, on the one hand need to meet friction pair and there is the hydrodynamic bearing capacity that higher relative velocity generation is enough, on the other hand need to pay close attention to fluid dynamics in bearing area of low pressure, have higher requirement to the design of oil-free low boiling lubricant hydrodynamic bearing.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the slot type cold-producing medium dynamic pressure fluid Nonlubricated bearing that it is an object of the invention to provide a kind of higher-pressure region to couple for low boiling, low viscosity fluid hydrodynamic lubrication is secondary, be a kind of high bearing capacity and in can effectively suppressing low boiling lubricant hydrodynamic bearing the shaped grooved hydrodynamic bearing in surface of negative pressure cavitation erosion secondary, improve the integral pressure level in bearing friction pair by the high-pressure fluid region in coupling radial friction pair cavity and thrust friction pair cavity, increase radial and axial bearing capacity and the stability of bearing.
In order to achieve the above object, the technical solution used in the present invention is:
The slot type cold-producing medium dynamic pressure fluid Nonlubricated bearing of a kind of higher-pressure region coupling is secondary, including bearing base 1 and main shaft 2, it is characterised in that:
Radially the carrying face of cylinder 3 and thrust carrying anchor ring 4 are distributed on described bearing base 1；The face of cylinder 7 and anchor ring 10 are distributed on main shaft 2；It is secondary that the circular radial cylinder 3 of bearing base 1 and the face of cylinder 7 on main shaft 2 form radial friction, and the thrust anchor ring 4 of bearing base 1 forms thrust friction pair with the anchor ring 10 on main shaft 2；
Described radial friction is secondary, be machined with molded line conduit on thrust friction pair, described molded line conduit be machined with four kinds of different arrangements, the first arrangement is: the radial direction carrying face of cylinder 3 and thrust on bearing base 1 carry and all process conduit on anchor ring 4, do not process conduit on main shaft 2；The second arrangement is: all process conduit on the face of cylinder 7 of main shaft 2 and anchor ring 10, does not process conduit on bearing base, and the processing method of conduit is constant；The third arrangement is to process conduit respectively on the face of cylinder 3 of bearing base 1 and the anchor ring 10 of main shaft 2, and the anchor ring 4 of bearing base 1 and the face of cylinder 7 of main shaft 2 do not process conduit；4th kind of arrangement is to process conduit respectively on the anchor ring 4 of bearing base 1 and the face of cylinder 7 of main shaft 2, and the face of cylinder 3 of bearing base 1 and the anchor ring 10 of main shaft 2 do not process conduit；
The one end on the described radial friction pair face of cylinder and the inner side communications and liaison of thrust friction pair anchor ring.The secondary cavity binding site with thrust friction pair of described radial friction arranges pressure control steam vent 5.
The described molded line conduit of thrust carrying and the fluting direction of the molded line conduit of radially carrying coordinate with the direction of rotation of spindle rotor 2, all in formation higher-pressure region, inner side, the molded line of the molded line conduit of the described molded line conduit for radially carrying and thrust carrying is straight line and space curve, or requires molded line is carried out special design and Optimized Matching according to the operating condition of load character and bearing.
Advantages of the present invention is mainly reflected in:
1, by the higher-pressure region coupling of journal bearing friction pair Yu thrust bearing friction pair, the effectively high-pressure area of lubricating fluid in maintenance bearing, improve the average pressure level in bearing friction pair, add bearing capacity and the stability of bearing, it is possible to the generation of the cavitation phenomenon that cavitates in suppression low boiling lubricant lubrication.This bearing arrangement form can bear the load of radial and axial both direction simultaneously, can use in pairs in engineer applied, compact conformation and have higher bearing capacity and angular rigidity；
2, radially carrying and thrust carrying conduit can be distributed on main shaft or bearing base, also can be respectively in by conduit on main shaft and bearing base and pass through combination formation friction pair, it is achieved mode flexibly and is prone to processing realization and producing in serial form；
3, use low boiling point refrigerant as hydrodynamic lubrication medium, the bearing support structure of rotary part can be simplified relative to hydrostatic lubrication mode, and overcome lubricating component and the sealing problem of process fluid in existing power-equipment, decrease the cold-producing medium leakage to environment；And on the other hand refrigerant system has been stopped to the use of oil lubricant, carry out dynamic pressure self-lubricating only with systematic working medium, improve stability and the reliability of system.
4, use low boiling lubricant as lubricant medium, dry friction heat in bearing and high speed shear heat can be taken away by the way of self phase transformation by low boiling lubricant in time if desired, have the effect of coolant concurrently, thus ensure the temperature stabilization in bearing to greatest extent；
5, pressure control steam vent can be used for pressure regulation, row's liquid/gas/heat, remove impurity or pressure measxurement etc., is conducive to improving antiwhip and reliability.
Accompanying drawing explanation
Figure 1A is the high-bearing capacity slot type hydrodynamic bearing pair installation diagram of higher-pressure region coupling, and Figure 1B is part drawing；
Fig. 2 A is the first typical case's fluting layout type that high-bearing capacity slot type hydrodynamic bearing is secondary, and Fig. 2 B is another kind of typical case's fluting layout type that high-bearing capacity slot type hydrodynamic bearing is secondary；
Fig. 3 A is fluting bearing base construction sectional view, and Fig. 3 B is fluting bearing base construction upward view；
Fig. 4 A is main axle structure front view, Fig. 4 B main axle structure left view；
Fig. 5 A is that higher-pressure region couples slot type friction pair circular radial cylinder coupling pressure schematic diagram, and Fig. 5 B is that higher-pressure region couples slot type friction pair thrust anchor ring coupling pressure schematic diagram.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings.
The slot type cold-producing medium dynamic pressure fluid Nonlubricated bearing of a kind of higher-pressure region coupling is secondary, with reference to Fig. 1, including bearing base 1 and main shaft 2, it is characterised in that:
Radially the carrying face of cylinder 3 and thrust carrying anchor ring 4 are distributed on described bearing base 1；The face of cylinder 7 and anchor ring 10 are distributed on main shaft 2；It is secondary that the circular radial cylinder 3 of bearing base 1 and the face of cylinder 7 on main shaft 2 form radial friction, and the thrust anchor ring 4 of bearing base 1 forms thrust friction pair with the anchor ring 10 on main shaft 2；
Described radial friction is secondary, be machined with molded line conduit on thrust friction pair, and in radial friction pair, the molded line conduit of processing plays radially carrying effect, and on thrust friction pair, the molded line conduit of processing plays thrust carrying effect.Described molded line conduit be machined with four kinds of different arrangements, the first arrangement is, with reference to Fig. 2 A: all processes conduit on radial direction on the bearing base 1 carrying face of cylinder 3 and thrust carrying anchor ring 4, does not process conduit on main shaft 2.Specific practice is, with reference to Fig. 3, processing, on the radially carrying face of cylinder 3, the conduit A6 that some circumferences are uniform, the smooth, cylindrical peripheral surface of undressed conduit is radial light slide unit district 8, processing the conduit B9 that some circumferences are uniform on thrust anchor ring 4, the smooth torus face of undressed conduit is smooth district 11 of thrust.The second arrangement is with reference to Fig. 2 B: all process conduit on the face of cylinder 7 of main shaft 2 and anchor ring 10, does not process conduit on bearing base, and the processing method of conduit is constant；The third arrangement is to process conduit respectively on the face of cylinder 3 of bearing base 1 and the anchor ring 10 of main shaft 2, and the anchor ring 4 of bearing base 1 and the face of cylinder 7 of main shaft 2 do not process conduit；4th kind of arrangement is to process conduit respectively on the anchor ring 4 of bearing base 1 and the face of cylinder 7 of main shaft 2, and the face of cylinder 3 of bearing base 1 and the anchor ring 10 of main shaft 2 do not process conduit；
The one end on the described radial friction pair face of cylinder and the inner side communications and liaison of thrust friction pair anchor ring.The secondary cavity binding site with thrust friction pair of described radial friction arranges pressure control steam vent 5.
The described molded line conduit of thrust carrying and the fluting direction of the molded line conduit of radially carrying coordinate with the direction of rotation of spindle rotor 2, all in formation higher-pressure region, inner side.The molded line conduit of described radial direction carrying can be straight line and space curve with the molded line of the molded line conduit of thrust carrying, it is possible to requires molded line is carried out special design and Optimized Matching according to the operating condition of load character and bearing.
This patent is slotted with bearing base 1 and is illustrated for special case.Fig. 3 is fluting bearing base 1 structural representation, described bearing base 1 is distributed radially the carrying face of cylinder 3 and thrust carrying anchor ring 4, the radially carrying face of cylinder 3 is machined with the conduit A6 that some circumferences are uniform, the smooth, cylindrical peripheral surface of undressed conduit is radial light slide unit district 8, being machined with the conduit B9 that some circumferences are uniform on thrust anchor ring 4, the smooth torus face of undressed conduit is smooth district 11 of thrust.
Fig. 4 is main axle structure schematic diagram, it is secondary that the circular radial cylinder 3 of described bearing base 1 and the smooth, cylindrical peripheral surface 7 on main shaft 2 form radial friction, thrust anchor ring 4 and anchor ring 10 form thrust friction pair, constitute the face of cylinder 3 of radial friction pair one end and the inner side communications and liaison of thrust friction pair anchor ring 4.When radial friction pair and thrust friction pair are separately as load-carrying unit, owing to the axial two ends on the radial friction pair face of cylinder and the inside and outside circle of annulus thrust surface are ambient pressure, the pressure distribution formed is as shown in broken line in fig. 5, if by one end and the inner side communications and liaison of thrust anchor ring 4 on the face of cylinder 3 secondary for radial friction, formed pressure distribution such as Fig. 5 in shown in solid, the pressure of its binding site is above ambient pressure.Lubricating fluid is all pumped into radial friction pair cavity and the binding site of thrust friction pair cavity by the direction of rotation of radial friction pair conduit A6 and thrust friction pair conduit B9, the effectively stress level of lubricating fluid in maintenance bearing bore body, thus improving the radial direction of bearing, thrust bearing loading capability and stability, higher pressure has good inhibiting effect for the cavitation erosion of low viscosity, low boiling point refrigerant fluid lubrication.It addition, set up pressure control steam vent 5 at the above-mentioned binding site of bearing, may be used for arranging liquid/gas/heat, remove impurity or pressure measxurement etc., it is also possible to carry out regulation and the monitoring of bearing operating condition.
The fluting direction of the conduit A6 of thrust carrying and the conduit B9 of radially carrying coordinates with the direction of rotation of main shaft 2, all in formation higher-pressure region, inner side.Conduit A6 and conduit B9 does not has the requirement of concrete molded line mathematic(al) representation, and common molded line has straight line and space curve, it is possible to require molded line is carried out special design and Optimized Matching according to the operating condition of load character and bearing；The gap of bearing pair and groove/platform height x depth can require to be optimized design according to bearing capacity etc.；Radially loading bearing face 3 and the thrust carrying groove district of bearing surface 4, platform plot structure parameter are also dependent on the bearing pair performance design after coupling.
The present invention uses the process fluid such as low boiling point refrigerant of system as lubricant medium, instead of the oil base lubricant medium of routine, ensures that the high speed oil-free of rotor-support-foundation system is run；The frictional heat that cold-producing medium can produce as high speed shear in cooling medium absorption bearing, takes away above-mentioned shearing friction heat, it is to avoid low boiling gasifies and causes cavitation phenomenon in time；Thus realize the steady running of rotor；Coupled high voltage district promotes dynamic pressure effect that relative motion between surface of friction pair produces and grooved surface produces pumps into effect, effectively maintain the high-pressure area in bearing pair cavity and promote its pressure, increasing bearing capacity and the stability of low viscosity cold-producing medium lubrication bearing.
The operation principle of the present invention is: it is secondary that the circular radial cylinder 3 of bearing base 1 and the smooth, cylindrical peripheral surface 7 on main shaft 2 form radial friction, thrust anchor ring 4 and anchor ring 10 form thrust friction pair, constitute the face of cylinder 3 of radial friction pair one end and the inner side communications and liaison of thrust friction pair anchor ring 4, the fluting direction of the molded line groove A6 of thrust carrying and the molded line groove B9 of radially carrying coordinates with the direction of rotation of main shaft 2 rotor, utilize the alias in groove platform region and pump into effect respectively in formation high-pressure area, respective inner side, high-pressure fluid is maintained at radial friction pair cavity and the binding site of thrust friction pair cavity, improve the integral pressure level in friction pair thus improve bearing capacity and the stability of bearing, can effectively suppress the generation of low pressure cavitation erosion in low boiling lubricant hydrodynamic bearing simultaneously.Additionally, the binding site at radial friction pair cavity and thrust friction pair cavity can arrange pressure control steam vent 5, it is used for arranging liquid/gas/heat, remove impurity or pressure measxurement etc. while maintaining bearing pair chamber pressure, it is also possible to carry out regulation and the monitoring of bearing operating condition.The present invention can not only for bearing provide axially and radially of both load, and radial friction is secondary with thrust friction pair common high voltage region, is effectively increased the dynamic pressure pressure of fluid lubrication film in bearing bore body, adds angular rigidity and the stability of bearing.Additionally, bearing is when the low rate start stage, Hydrodynamic fluid film was not yet formed, between hydrodynamic bearing friction pair, dry friction can produce waste heat, easily cause bearing thermal deformation thus affect the operation characteristic of bearing, owing to low-boiling point liquid lubricant itself has bigger latent heat, by the way of self phase transformation, the frictional heat in bearing can be taken away in time, be conducive to improving antiwhip and reliability.
Claims (3)
1. the slot type cold-producing medium dynamic pressure fluid Nonlubricated bearing of a higher-pressure region coupling is secondary, including bearing base (1) and main shaft (2), it is characterised in that:
The radially carrying face of cylinder (3) and thrust carrying anchor ring (4) are distributed on described bearing base (1)；The face of cylinder (7) and anchor ring (10) are distributed on main shaft (2)；It is secondary that the circular radial cylinder (3) of bearing base (1) and the face of cylinder (7) on main shaft (2) form radial friction, and the thrust anchor ring (4) of bearing base (1) forms thrust friction pair with the anchor ring (10) on main shaft (2)；
Described radial friction is secondary, be machined with molded line conduit on thrust friction pair, described molded line conduit be machined with four kinds of different arrangements, the first arrangement is: the radial direction carrying face of cylinder (3) and thrust on bearing base (1) carry and all process conduit on anchor ring (4), do not process conduit on main shaft (2)；The second arrangement is: the face of cylinder (7) and anchor ring (10) in main shaft (2) all process conduit, do not process conduit on bearing base, and the processing method of conduit is constant；The third arrangement is to process conduit, the anchor ring (4) of bearing base (1) and the face of cylinder (7) of main shaft (2) respectively on the face of cylinder (3) of bearing base (1) and the anchor ring (10) of main shaft (2) not process conduit；4th kind of arrangement is to process respectively not process conduit on conduit, the face of cylinder (3) of bearing base (1) and the anchor ring (10) of main shaft (2) on the anchor ring (4) of bearing base (1) and the face of cylinder (7) of main shaft (2)；
The one end on the described radial friction pair face of cylinder and the inner side communications and liaison of thrust friction pair anchor ring.The secondary cavity binding site with thrust friction pair of described radial friction arranges pressure control steam vent (5).
The slot type cold-producing medium dynamic pressure fluid Nonlubricated bearing of a kind of higher-pressure region the most according to claim 1 coupling is secondary, it is characterised in that
The described molded line conduit of thrust carrying and the fluting direction of molded line conduit of radially carrying coordinate with the direction of rotation of spindle rotor (2), all in formation higher-pressure region, inner side.
The slot type cold-producing medium dynamic pressure fluid Nonlubricated bearing of a kind of higher-pressure region the most according to claim 1 coupling is secondary, it is characterised in that
The molded line of the molded line conduit of the described molded line conduit for radially carrying and thrust carrying is straight line and space curve, or requires molded line is carried out special design and Optimized Matching according to the operating condition of load character and bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286289.7A CN105822660B (en) | 2016-05-03 | 2016-05-03 | A kind of slot type refrigerant dynamic pressure fluid Nonlubricated bearing pair of higher-pressure region coupling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286289.7A CN105822660B (en) | 2016-05-03 | 2016-05-03 | A kind of slot type refrigerant dynamic pressure fluid Nonlubricated bearing pair of higher-pressure region coupling |
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| CN105822660A true CN105822660A (en) | 2016-08-03 |
| CN105822660B CN105822660B (en) | 2018-07-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322840A (en) * | 2018-08-12 | 2019-02-12 | 西安交通大学 | A kind of centrifugal coolant pump |
| TWI705190B (en) * | 2019-08-27 | 2020-09-21 | 建準電機工業股份有限公司 | Bearing system |
| CN113555998A (en) * | 2021-07-29 | 2021-10-26 | 中国船舶重工集团公司第七0七研究所 | Dynamic pressure air-bearing structure with pollution filtering device |
| CN113883161A (en) * | 2021-09-15 | 2022-01-04 | 东南大学 | Textured dynamic pressure spiral groove thrust bearing and static characteristic design method thereof |
| CN114321180A (en) * | 2021-12-31 | 2022-04-12 | 连云港斯克斯机器人科技有限公司 | Three-direction bearing hybrid bearing based on steepest descent wedge-shaped groove |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113883161B (en) * | 2021-09-15 | 2023-11-24 | 东南大学 | Textured dynamic pressure spiral groove thrust bearing and static characteristic design method thereof |
| CN114321180A (en) * | 2021-12-31 | 2022-04-12 | 连云港斯克斯机器人科技有限公司 | Three-direction bearing hybrid bearing based on steepest descent wedge-shaped groove |
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