CN104132066B - A kind of floating bearing structure for small sized turbocharger - Google Patents
A kind of floating bearing structure for small sized turbocharger Download PDFInfo
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- CN104132066B CN104132066B CN201410334364.3A CN201410334364A CN104132066B CN 104132066 B CN104132066 B CN 104132066B CN 201410334364 A CN201410334364 A CN 201410334364A CN 104132066 B CN104132066 B CN 104132066B
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- bearing housing
- floating bearing
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- oil
- semifloating
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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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
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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
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
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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
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/18—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with floating brasses or brushing, rotatable at a reduced speed
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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
- F16C17/26—Systems consisting of a plurality of sliding-contact bearings
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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
- F16C2360/00—Engines or pumps
- F16C2360/23—Gas turbine engines
- F16C2360/24—Turbochargers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supercharger (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention provides a kind of floating bearing structure for small sized turbocharger, belong to field of mechanical technique.It solve the problems such as low, the easy self-excited vibration of the existing bearing structure efficiency for turbosupercharger, durability and poor stability.This floating bearing structure being used for small sized turbocharger comprises monomer semifloating bearing housing, monomer semifloating bearing housing offer several oil-through holes one and there is static oil clearance between monomer semifloating bearing housing and bearing support, monomer semifloating bearing housing offers spill port, turbine shaft is arranged with full floating bearing housing, full floating bearing housing and monomer semifloating bearing housing axially locating and full floating bearing housing offers several oil-through holes two, dynamic oil film gap one is there is between full floating bearing housing and monomer semifloating bearing housing, dynamic oil film gap two is there is between full floating bearing housing and turbine shaft.The present invention have rational in infrastructure, reliability is high and efficiency advantages of higher.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of floating bearing, particularly a kind of floating bearing structure for small sized turbocharger.
Background technique
Be at present no matter the technical quality state of external or domestic small sized turbocharger, all reached quite high optimum level, its improve pressurized machine transmission efficiency of shafting can for the space of excavating further and potentiality also more and more less.
Floating bearing divides full floating bearing and semifloating bearing two class, and as shown in Figure 1, as n1=0, full floating bearing just becomes semifloating bearing structure, and arrow represents the motion of chargeoil oil film, carrying, flow direction.Along with the rotating speed of pressurized machine improves day by day, when after n > 40000r/min, common sliding bearing has been difficult to be competent at, therefore most employing floating bearing on current small sized turbocharger, now two class floating bearing pressurized machines are carried out difference comparative analysis, to find the Pathway engineering solving and improve pressurized machine transmission efficiency of shafting further.
Floating bearing is analyzed as follows: because all there is oil film on floating bushing two sides, therefore when not increasing gap between adjacently situated surfaces, greatly can increase the lubricating oil amount flowing through bearing, thus reduce bearing temperature, its result can represent with so-called temperature coefficient: γ=⊿ te/ ⊿ tf; Shi Zhong ⊿ tf, ⊿ te is respectively the temperature rise of lubricating oil in floating bearing and lubricating oil bearing.Various documents and materials illustrate and test result also shows that γ is always greater than 1, γ=1.5 ~ 2.29, after proving to adopt floating bearing, can reduce bearing temperature.
Because floating bushing rotates with certain rotating speed, correspondingly reduce and relative velocity between axle journal and bearing saddle bore, thus friction in bearings power can be reduced.This is because friction horsepower is and square being directly proportional of peripheral velocity in the same circumstances.The actual speed of floating bushing can be determined with following formula:
; In formula, n1, n0 represent rotating speed and the axle journal rotating speed of floating bushing respectively; ⊿ 1, ⊿ 2 represent the interior external series gap in bearing respectively; R2/r1 is radius ratio; The degree of eccentricity of external series gap in ε 1, ε 2 represent respectively.I.e. ε 1=l1/ ⊿ 1, ε 2=l2/ ⊿ 2; L1, l2 represent the degree of eccentricity of interior external series gap respectively.
Because gap total in bearing is larger, therefore as rotor because dynamic balancing destroys to some extent, when its rotating center does not overlap with geometrical axis, floating bearing can be made adjustment automatically, namely itself is equivalent to a yielding support, therefore reduces the requirement to rotor dynamic balancing, is specially adapted to high speed operation process, again can the vibration that produces of good absorption rotor, thus extend its operating life.
Here the pluses and minuses of integrated type full floating bearing structure are resolved:
Advantage: LZ value is little compared with double-row type structure, shortens the axial length of pressurized machine, the deflection deformation of axle and beat less, and the reliability of axle is relatively better, and material consumption is few and cost reduces.
Shortcoming: it is higher that axle easily produces self-oscillatory frequency probability, easily causes the instability of axle system and unreliable; Because overall full floating cover weight is large, be unfavorable for floating, Floating efficiency is low and affect the raising of shaft efficiency; If axial longer dimension is overlapped in overall full floating, be also difficult to ensure very high machining accuracy, and the stability of axle system is also lower than double-row type structure.
So integrated type full floating bearing structure is sublated substantially in practicality, mostly be the pressurized machine axle system of double-row type structure or monomer semifloating structure.
Again biserial split full floating bearing type pressurized machine and shafting structure pluses and minuses are resolved:
Advantage: known by all-floating structure principle, full floating bearing housing holes internal surface carries turbine shaft by dynamic oil film, and promote the clockwise High Rotation Speed of turbine shaft by the combustion gas expansion work of motor, and full floating bearing housing outer surface is all carried by dynamic oil film, and also do clockwise High Rotation Speed relative to turbine shaft, the i.e. superposition sum of the Second-Stage Rotating Speed of the rotating speed of pressurized machine as many as turbine shaft one-level rotating speed and full floating bearing housing, so just actually reduce the actual speed of turbine shaft, improve the operational safety of turbine shaft, and the efficiency of axle system wants high relative to monomer semifloating bearing structure.
Shortcoming: turbine shaft and axle-system axial length longer, be unfavorable for that turbocharger arrangement miniaturization, material consumption are comparatively large, rotator inertia heavier mass, because of axle system head the deflection deformation of axle and machining accuracy relative requirement that is comparatively large, each part of axle system of beating higher, harmful self oscillations (i.e. oil whip) factor of axle system is difficult to thoroughly overcome and solve, thus the vibrations of axle system are comparatively large, and reliability is poor; Dynamic balancing quality level requires higher, and then processing cost improves.
Then the pluses and minuses of monomer-type semifloating bearing structure are resolved:
Advantage: because semifloating bearing housing maintains static dynamic, the oil film of semifloating bearing housing outer surface is carried as static state, the self oscillations that the turbine shaft one-level rotating speed of shaft produces serves good static damping, vibration damping and shock-absorbing effect, and the reliability of axle is improved; Turbine shaft and axle-system axial length shorter, be conducive to that turbocharger arrangement miniaturization, material consumption are less, rotator inertia lighter weight, be beneficial to the realization of goal of small sized turbocharger high pressure ratio speed up, and the deflection deformation of axle and machining accuracy that is less, each part of axle system of beating more easily realize comparatively speaking.
Shortcoming: because semifloating bearing housing maintains static dynamic, semifloating bearing housing endoporus first-stage dynamic oil film is only had to carry turbine shaft, the clockwise High Rotation Speed of turbine shaft is promoted by the combustion gas expansion work of motor, the frictional power loss of axle system is made to separate full floating bearing type and Yan Yao great relative to biserial, and reduce transmission efficiency of shafting, actual speed because of pressurized machine equals the one-level rotating speed of turbine shaft, turbine shaft rotating speed is very high, require that the dynamic balancing quality level of axle is very high equally, improve processing cost.
In sum, substantially, outside being sublated in practicality except overall full floating bearing structure, double-row type full floating bearing structure and monomer semifloating bearing structure, all because of its separately floating bearing structural disadvantages restriction, the efficiency of axle system is difficult to improve again, thus limits the further raising of small-sized pressurized machine total efficiency and high speed and high pressure ratio.
Summary of the invention
The object of the invention is for the above-mentioned problems in the prior art, provide a kind of floating bearing structure for small sized turbocharger, its structure is simple, cost is low, and more effectively can improve the requirement of transmission efficiency of shafting and more excellent reliability, reach the further miniaturization of Modern Small turbosupercharger, excavate and improve turbo-charger shaft system system effectiveness, reaching and improve the object of small sized turbocharger total efficiency.
Object of the present invention realizes by following technical proposal: a kind of floating bearing structure for small sized turbocharger, comprise and being placed in turbine shaft and the monomer semifloating bearing housing of locating mutually with bearing support, described monomer semifloating bearing housing offers several oil-through holes one and there is static oil clearance between monomer semifloating bearing housing and bearing support, described monomer semifloating bearing housing offers spill port, it is characterized in that, described turbine shaft is arranged with the full floating bearing housing between monomer semifloating bearing housing and turbine shaft, described full floating bearing housing and monomer semifloating bearing housing axially locating and full floating bearing housing offers several oil-through holes two, dynamic oil film gap one is there is between described full floating bearing housing and monomer semifloating bearing housing, dynamic oil film gap two is there is between described full floating bearing housing and turbine shaft.
Above-mentioned a kind of in the floating bearing structure of small sized turbocharger, described spill port is opened in the middle part of monomer semifloating bearing housing, the quantity of described full floating bearing housing is two and is symmetrical in spill port to arrange, two full floating bearing housings all with monomer semifloating bearing housing axially locating.
Above-mentioned a kind of in the floating bearing structure of small sized turbocharger, described monomer semifloating bearing housing is embedded with four back-up rings, two full floating bearing housings between the two panels back-up ring of correspondence and separately two ends all lean with back-up ring.
Above-mentioned a kind of in the floating bearing structure of small sized turbocharger, described full floating bearing housing offers the oil-through hole two that two circumferences are arranged symmetrically with, described oil-through hole two is radial hole and is positioned in the middle part of full floating bearing housing, the quantity of described oil-through hole one is four and is radial hole, oil-through hole one be divided into symmetrical two groups and two oil-through holes one often in group all circumference be arranged symmetrically with, the axis often organizing oil-through hole one is in same plane with the axis of oil-through hole two on corresponding full floating bearing housing.Such lubricant oil enters dynamic oil film gap one, the second-rate happy speed in dynamic oil film gap, and lubricant oil can even formative dynamics lubricating oil oil film between dynamic oil film gap one, dynamic oil film gap two rapidly.
A kind of in the floating bearing structure of small sized turbocharger, described static oil clearance is 0.03-0.13mm above-mentioned, and dynamic oil film gap one and dynamic oil film gap two are 0.03-0.10mm.
A kind ofly in the floating bearing structure of small sized turbocharger, described bearing support is equipped with locating stud above-mentioned, the end sections radial direction of described locating stud penetrates monomer semifloating bearing housing one end.Such location, manufacture and installation are all more for convenience.
Above-mentioned a kind of in the floating bearing structure of small sized turbocharger, the outer circumferential face of described monomer semifloating bearing housing offers twice and is symmetrical in the annular groove that spill port arranges.Lubricant oil forms the static lubricating oil oil film of thickness appropriateness between static oil clearance, and annular groove plays frequency iris action, plays good suppression self-oscillation (static lubricating oil film shocks).
Compared with prior art, this floating bearing structure being used for small sized turbocharger has the following advantages:
1, this floating bearing structure being used for small sized turbocharger inherits the advantage of monomer semifloating bearing structure, turbine shaft and axle-system axial length shorter, be conducive to that turbocharger arrangement miniaturization, material consumption are less, rotator inertia lighter weight, be beneficial to the realization of goal of small sized turbocharger high pressure ratio speed up, and the deflection deformation of turbine shaft and machining accuracy that is less, each part of axle system of beating more easily realize comparatively speaking.
2, this floating bearing structure being used for small sized turbocharger has better vibration damping shock-absorbing functions, and axle system is reliable and stable;
3, this floating bearing structure being used for small sized turbocharger has good sinking support effect, the short advantage having more warp resistance distortion and vibration of axle;
4, this floating bearing structure being used for small sized turbocharger has less frictional loss, and turbine shaft efficiency is higher, makes pressurized machine total efficiency higher;
5, this is used for floating bearing structure of small sized turbocharger and makes supercharger speed be the rotating speed superposition sum of full floating bearing housing and turbine shaft, is more conducive to small-sized pressurized machine high pressure ratio and more high-revolving realization;
6, better, axle system temperature is reduced further, and the running reliability and stability of turbine shaft improves further for this appearance of lubricating oil equivalent for the axle system of the floating bearing structure of small sized turbocharger heat and heat dispersion.
Accompanying drawing explanation
Fig. 1 is the operation schematic diagram of existing floating bearing structure.
Fig. 2 is originally for the operation schematic diagram of the floating bearing structure of small sized turbocharger.
Fig. 3 is originally for the sectional structure schematic diagram of the floating bearing structure of small sized turbocharger.
Fig. 4 is the schematic enlarged-scale view in Fig. 3 circle A.
In figure, 1, turbine shaft; 2, bearing support; 3, monomer semifloating bearing housing; 4, oil-through hole one; 5, static oil clearance; 6, spill port; 7, full floating bearing housing; 8, oil-through hole two; 9, dynamic oil film gap one; 10, dynamic oil film gap two; 11, back-up ring; 12, locating stud; 13, annular groove.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 3, this is used for floating bearing structure of small sized turbocharger and comprises and being placed in turbine shaft 1 and the monomer semifloating bearing housing 3 of locating with bearing support 2 phase, the present embodiment middle (center) bearing body 2 is equipped with locating stud 12, the end sections radial direction of locating stud 12 penetrates monomer semifloating bearing housing 3 one end, facilitates monomer semifloating bearing housing 3 and bearing support 2 to locate like this.Monomer semifloating bearing housing 3 offer several oil-through holes 1 and there is static oil clearance 5 between monomer semifloating bearing housing 3 and bearing support 2, monomer semifloating bearing housing 3 offers spill port 6, turbine shaft 1 is arranged with the full floating bearing housing 7 between monomer semifloating bearing housing 3 and turbine shaft 1, full floating bearing housing 7 is with monomer semifloating bearing housing 3 axially locating and full floating bearing housing 7 offers several oil-through holes 28, dynamic oil film gap 1 is there is between full floating bearing housing 7 and monomer semifloating bearing housing 3, dynamic oil film gap 2 10 is there is between full floating bearing housing 7 and turbine shaft 1, static oil clearance 5 is 0.03-0.13mm, dynamic oil film gap 1 and dynamic oil film gap 2 10 are 0.03-0.10mm, in the present embodiment, static oil clearance 5 is 0.13mm, dynamic oil film gap 1 and dynamic oil film gap 2 10 are 0.05mm.
Describe in detail further, as shown in Figure 3 and Figure 4, in the present embodiment, spill port 6 is opened in the middle part of monomer semifloating bearing housing 3, the outer circumferential face of monomer semifloating bearing housing 3 offers the annular groove 13 that twice are symmetrical in spill port 6 setting, the quantity of full floating bearing housing 7 is two and is symmetrical in spill port 6 to arrange, two full floating bearing housings 7 all with monomer semifloating bearing housing 3 axially locating.Monomer semifloating bearing housing 3 is embedded with four back-up rings, 11, two full floating bearing housings 7 all to lean with back-up ring 11 at two ends between the two panels back-up ring 11 of correspondence and separately.Full floating bearing housing 7 offers the oil-through hole 28 that two circumferences are arranged symmetrically with, oil-through hole 28 is radial hole and is positioned in the middle part of full floating bearing housing 7, the quantity of oil-through hole 1 is four and is radial hole, oil-through hole 1 be divided into symmetrical two groups and two oil-through holes 1 often in group all circumference be arranged symmetrically with, the axis often organizing oil-through hole 1 is in same plane with the axis of oil-through hole 28 on corresponding full floating bearing housing 7.
As shown in Figure 2 and Figure 4, during use, in the oil pocket that the lubricant oil (corresponding low engine speed operating mode is to high-speed working condition 0.15 ~ 0.4Mpa) that pressure is higher enters bearing support 2 and oilhole, lubricant oil forms the static lubricating oil oil film of thickness appropriateness between static oil clearance 5 afterwards, lubricant oil again through oil inlet hole one, oil inlet hole two, formative dynamics lubricating oil oil film between dynamic oil film gap 1, dynamic oil film gap 2 10, static lubricating oil oil film plays good static damping and vibration damping shock-absorbing functions, because the high speed of turbine shaft 1 turns clockwise, add that the dynamic lubricating oil oil film at dynamic oil film gap 1 place and the vector of oil pressure promote, carry full floating bearing housing 7 outer surface, produce a relative same-directional high-speed to turn clockwise, the dynamic lubricating oil oil film at dynamic oil film gap 1 place of the internal surface of full floating bearing housing 7 and oil pressure support the turbine shaft 1 turned clockwise at a high speed, make the actual speed of pressurized machine, for the relative rotation speed of full floating bearing and the superposition sum of turbine shaft 1 two-stage rotating speed, lubricant oil is taken away because of the heat that High Rotation Speed produces in axle system, draws off, until the return opening of bearing support 2 finally by the spill port 6 of monomer semifloating bearing housing 3 and full floating bearing housing 7 two ends oil unloading trough.
This floating bearing structure being used for small sized turbocharger had both remained double-row type full floating bearing and monomer semifloating bearing advantage separately, and respective shortcoming of having sublated again, reaches mutual supplement with each other's advantages.The monomer semifloating bearing housing 3 do not rotated and in relative rotation full floating bearing housing 7 are semi-floating structure, the static oil clearance 5 of monomer semifloating bearing housing 3 outer surface is carried by the static lubricating oil oil film of thickness appropriateness, play good suppression self oscillations (oil whip), reach static damping and eliminate harmful self-excited oscillatory frequency, and the effect of vibration damping shock-absorbing, rotate full floating bearing housing 7 and relative to full floating bearing inner surface further in relative rotation turbine shaft 1 be full-floating type structure, because of the existence of dynamic lubricating oil oil film, being equivalent to turbine shaft 1 is restrained in a flexible support, in addition the static elastic damping that monomer semifloating bearing housing 3 place is good, its sinking support effect is better more excellent than double-row type all-floating structure, it serves and better suppresses the self oscillations of axle system and the mechanical coupled vibrations of axle, reach best vibration damping and the effect of shock-absorbing, further increase the reliability of pressurized machine axle system, and it is relatively also loose for the dynamic balancing quality requirement of rotating shaft, be beneficial to process implementing and cut down finished cost.
This floating bearing structure being used for small sized turbocharger obtains excellent static damping capacity by the static lubricating oil oil film at monomer semifloating bearing housing 3 place, more by the existence of the dynamic lubricating oil oil film of full floating bearing housing 7, harmful self-excited oscillatory frequency of full floating bearing housing 7 and axle and the mechanical coupled vibrations frequency of axle, when being passed to monomer semifloating bearing housing 3, obtain step vibration damping and shock-absorbing, improve reliability and the durability of this axle system, so this floating bearing structure being used for small sized turbocharger is not only applicable to the situation of extreme pressure lubricant, and be applicable to the lower situation of lubricating oil pressure, better adaptability is wider, semifloating bearing of changing over be adapted to charge oil pressure on the low side when traditional understanding and practical basic condition.
This is used for the dynamic lubricating oil oil film carrying turbine shaft 1 of full floating bearing housing 7 internal surface in the floating bearing structure of small sized turbocharger, and promote turbine shaft 1 High Rotation Speed clockwise by the combustion gas expansion work of motor, and full floating bearing housing 7 outer surface is also carried by dynamic lubricating oil oil film, and do clockwise High Rotation Speed relative to turbine shaft 1, i.e. the superposition sum of the Second-Stage Rotating Speed of the rotating speed of pressurized machine as many as turbine shaft 1 one-level rotating speed and full floating bearing housing 7 simultaneously.According to data and experience introduction: depending on the fit of its quality of lubrication oil, static oil clearance 5, dynamic oil film gap 1 and dynamic oil film gap 2 10 size, full floating bearing housing 7 relatively rotary rpm is about according to floating bushing formula to calculating in 35% ~ 50% scope of the total rotating speed of pressurized machine, this reduces the actual speed of turbine shaft 1, improve the operational safety of turbine shaft 1, and wanting of the efficiency relative monomer semifloating bearing structure of axle system is high, and then reduce the frictional power loss of axle system, improve the total efficiency of small sized turbocharger.Calculate that extension is analyzed known according to temperature coefficient formula principle, lubricant oil due to this floating bearing structure and axle system being used for small sized turbocharger holds thermal capacitance sum heat radiation volume, large relative to the appearance thermal capacitance sum heat radiation volume than full floating bearing structure axle system, monomer semifloating bearing structure, there is unit less than the temperature rise of equivalent lubricant oil volume, the advantages such as radiating effect is better, make the lubricating condition of this axle system and oil film dynamically carry better quality, further ensure the stable and reliable of axle system and axle.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ the terms such as turbine shaft 1, bearing support 2, monomer semifloating bearing housing 3, oil-through hole 1, static oil clearance 5, spill port 6, full floating bearing housing 7, oil-through hole 28, dynamic oil film gap 1, dynamic oil film gap 2 10, back-up ring 11, locating stud 12, annular groove 13 herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (7)
1. the floating bearing structure for small sized turbocharger, comprise and be placed on the upper and monomer semifloating bearing housing (3) of locating mutually with bearing support (2) of turbine shaft (1), described monomer semifloating bearing housing (3) offer several oil-through holes one (4) and there is static oil clearance (5) between monomer semifloating bearing housing (3) and bearing support (2), described monomer semifloating bearing housing (3) offers spill port (6), it is characterized in that, described turbine shaft (1) is arranged with the full floating bearing housing (7) be positioned between monomer semifloating bearing housing (3) and turbine shaft (1), described full floating bearing housing (7) and monomer semifloating bearing housing (3) axially locating and full floating bearing housing (7) offers several oil-through holes two (8), dynamic oil film gap one (9) is there is between described full floating bearing housing (7) and monomer semifloating bearing housing (3), dynamic oil film gap two (10) is there is between described full floating bearing housing (7) and turbine shaft (1).
2. a kind of floating bearing structure for small sized turbocharger according to claim 1, it is characterized in that, described spill port (6) is opened in monomer semifloating bearing housing (3) middle part, the quantity of described full floating bearing housing (7) is two and is symmetrical in spill port (6) to arrange, two full floating bearing housings (7) all with monomer semifloating bearing housing (3) axially locating.
3. a kind of floating bearing structure for small sized turbocharger according to claim 2, it is characterized in that, described monomer semifloating bearing housing (3) is embedded with four back-up rings (11), two full floating bearing housings (7) are positioned between corresponding two panels back-up ring (11) and respective two ends and all lean with back-up ring (11).
4. a kind of floating bearing structure for small sized turbocharger according to claim 3, it is characterized in that, described full floating bearing housing (7) offers the oil-through hole two (8) that two circumferences are arranged symmetrically with, described oil-through hole two (8) for radial hole and be positioned at full floating bearing housing (7) middle part, the quantity of described oil-through hole one (4) is four and is radial hole, oil-through hole one (4) is divided into symmetrical two groups and the equal circumference of two oil-through holes one (4) often in group to be arranged symmetrically with, the axis often organizing oil-through hole one (4) is in same plane with the axis of the upper oil-through hole two (8) of corresponding full floating bearing housing (7).
5. a kind of floating bearing structure for small sized turbocharger according to claim 1 or 2 or 3 or 4, it is characterized in that, described static oil clearance (5) is 0.03-0.13mm, and dynamic oil film gap one (9) and dynamic oil film gap two (10) are 0.03-0.10mm.
6. a kind of floating bearing structure for small sized turbocharger according to claim 1 or 2 or 3 or 4, it is characterized in that, described bearing support (2) is equipped with locating stud (12), and the end sections radial direction of described locating stud (12) penetrates monomer semifloating bearing housing (3) one end.
7. a kind of floating bearing structure for small sized turbocharger according to Claims 2 or 3 or 4, is characterized in that, the outer circumferential face of described monomer semifloating bearing housing (3) offers twice and is symmetrical in the annular groove (13) that spill port (6) arranges.
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| CN201410334364.3A CN104132066B (en) | 2014-07-15 | 2014-07-15 | A kind of floating bearing structure for small sized turbocharger |
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| CN201410334364.3A CN104132066B (en) | 2014-07-15 | 2014-07-15 | A kind of floating bearing structure for small sized turbocharger |
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| CN104132066B true CN104132066B (en) | 2016-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104832539A (en) * | 2015-05-29 | 2015-08-12 | 无锡科博增压器有限公司 | Floating bearing |
| CN105317841A (en) * | 2015-12-08 | 2016-02-10 | 中车大连机车研究所有限公司 | Semi-floating transverse bearing used for turbocharger |
| CN105972080A (en) * | 2016-06-03 | 2016-09-28 | 广东工业大学 | Electro-hydraulic servo bearing |
| CN108266272B (en) * | 2018-03-12 | 2024-07-12 | 西北工业大学 | Shaft sleeve of miniature turbine engine |
| CN113153908A (en) * | 2021-04-12 | 2021-07-23 | 湖南天雁机械有限责任公司 | Dry-grinding-prevention bearing sleeve, bearing system thereof and supercharger |
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| CN2702117Y (en) * | 2004-04-01 | 2005-05-25 | 刘立想 | Double layer floating bearing |
| EP2037100A1 (en) * | 2006-06-21 | 2009-03-18 | IHI Corporation | Bearing structure for rotating machine, rotating machine, method of producing bearing structure, and method of producing rotating machine |
| CN203948460U (en) * | 2014-07-15 | 2014-11-19 | 浙江荣发动力有限公司 | A kind of floating bearing structure for small sized turbocharger |
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| JPS5565723A (en) * | 1978-11-14 | 1980-05-17 | Nissan Motor Co Ltd | Lubricating configuration of floating bush |
| JP5082477B2 (en) * | 2007-02-07 | 2012-11-28 | 株式会社Ｉｈｉ | Floating bush bearing structure |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2702117Y (en) * | 2004-04-01 | 2005-05-25 | 刘立想 | Double layer floating bearing |
| EP2037100A1 (en) * | 2006-06-21 | 2009-03-18 | IHI Corporation | Bearing structure for rotating machine, rotating machine, method of producing bearing structure, and method of producing rotating machine |
| CN203948460U (en) * | 2014-07-15 | 2014-11-19 | 浙江荣发动力有限公司 | A kind of floating bearing structure for small sized turbocharger |
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| CN104132066A (en) | 2014-11-05 |
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Address after: 317500 Central Industrial Zone, Chengnan Town, Taizhou City, Zhejiang, Wenling Patentee after: Zhejiang Rongfa Power Co.,Ltd. Address before: 317500 Central Industrial Zone, Chengnan Town, Taizhou City, Zhejiang, Wenling Patentee before: ZHEJIANG RONGFA MOTOR ENGINE Co.,Ltd. |
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Denomination of invention: Floating bearing structure for small turbocharger Effective date of registration: 20220627 Granted publication date: 20160427 Pledgee: Zhejiang Tyrone commercial bank Limited by Share Ltd. Taizhou Wenling branch Pledgor: Zhejiang Rongfa Power Co.,Ltd. Registration number: Y2022330001105 |
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