CN104679990B - A kind of automobile-used rotatory sealing abrasion analysis method for having the micro- texture in surface - Google Patents
A kind of automobile-used rotatory sealing abrasion analysis method for having the micro- texture in surface Download PDFInfo
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- CN104679990B CN104679990B CN201510041189.3A CN201510041189A CN104679990B CN 104679990 B CN104679990 B CN 104679990B CN 201510041189 A CN201510041189 A CN 201510041189A CN 104679990 B CN104679990 B CN 104679990B
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Abstract
The present invention provides a kind of automobile-used rotatory sealing Analysis of Wearing Mechanism method for having the micro- texture in surface, and, using the linear velocity that sealing surface rotates against as X-axis, the rough peak contact is that Y-axis establishes two-dimensional coordinate system for it；The linear velocity V that sealing surface under extraction synchronization t vehicle clutch actual condition rotates against(m), rough peak contact pressure F(t), the linear velocity V that is rotated against according to the sealing surface of synchronization(m)With rough peak contact pressure F(t)A point P is drawn in the two-dimensional coordinate system(t)；The wear rate η under vehicle clutch actual condition is obtained according to the ratio between the wear extent using synchronization t and friction stroke(t), in the point P of drafting(t)Place marks obtained wear rate η(t)；Fastened in this way in the two-dimensional coordinate and draw the point at multiple moment, mark the wear rate at multiple moment, wear map of completing；Failure Boundaries are determined according to actual condition in the wear map, when the point of drafting exceedes the Failure Boundaries, determine that curve rotatory sealing is failed.
Description
Technical field
The invention belongs to system of vehicle transmission technical field, more particularly to a kind of automobile-used rotatory sealing for having the micro- texture in surface to wear
Analysis method.
Background technology
In vehicle drive system, rotating seal ring is used for the distributing device of wet clutch or brake, is therein
Critical seal element, directly affect overall performance, security, reliability and the durability of transmission device.In the use of reality
During often because the failure of rotatory sealing, and causes the failure of whole conventional apparatus.Its failure mode is mostly seal face
Heavy wear, this wear out failure depend on friction pair face lubricating status.Effectively determine that wear extent energy Accurate Prediction is close
Seal ring working life and maximal work ability.
Wear map (Wear map) is also referred to as wear form figure (Wear mode diagram), Wear Mechanisms Map (Wear
Mechanism map) or abrasion diagram (Wear diagram), it is material wear rate database (Numeric
Databases) and wear out failure aspect graph (Topographic databases) combination.So-called material wear rate database
It is that the friction factor and wear rate under different condition are provided in the form of tables of data, can estimates to represent part according to this tables of data
Actual friction durability, but data sharing is poor.And provide the wear out failure shape of details in terms of wear surface failure mechanism
State figure, the wear phenomenon of theory is excessively biased toward, the directive significance that estimation is worn to actual friction pair is little.Wear map is to the two
Learn from other's strong points to offset one's weaknesses, wear rate and abrasion mechanism under different operating modes are reflected on same figure, and during the change of fretting wear condition
Transformation relation between different abrasion mechanisms, it is the most strong instrument of current progress wear design.Briefly, wear map is exactly
Wear rate data and wear surface morphological data information are drawn on a figure simultaneously, establish an integrated information database.
In the influence factor of abrasion, can directly quantification treatment only minority, quite a few is at present can't
Quantification treatment.Therefore, principal element should be caught during wear map is made, ignores secondary cause.Using normal pressure,
Sliding speed, thermal conductivity factor and friction pair hardness are as the main method that variable research variable is wear map research.
Conventional wear figure is studied for wear extent of certain material under different operating modes with abrasion mechanism.Riahi and
Alpas is studied wear law of the cast iron materials under dry friction operating mode, constructs wear map.Truhan etc. is to engine
The wear law of piston ring and cylinder sleeve friction pair is studied, and analyzes abrasion mechanism.Mezghani and Mansori are to difference
Particle size finishing belt surface abrasion rule is analyzed, and constructs wear map to analyze abrasion mechanism transition process.
Bosman and Schipper establishes the wear map of boundary lubrication contact condition.
But the research of wear map at this stage is mainly for material of the surface without micro- texture, and for there is the micro- texture in surface
Automobile-used rotatory sealing, due to the presence of hydrodynamic effect, hydrodynamic assume responsibility for a part of solid rough peak bearing capacity.Cause
This, conventional wear figure can not accurately embody the carrying degree of solid rough peak using external applied load as coordinate.
The content of the invention
To solve the above problems, the present invention provides a kind of automobile-used rotatory sealing abrasion analysis method for having the micro- texture in surface,
It has acquired the rough peak bearing capacity for having the micro- texture in surface, and give the wear map of the automobile-used rotatory sealing of the micro- texture in surface
Construction method, curve rotatory sealing failure conditions can determine by the wear map.
The automobile-used rotatory sealing abrasion analysis method for having the micro- texture in surface of the present invention, it includes：
Step 1, obtain the pressure oil pressure needed for the vehicle clutch actual condition at m moment and pressure oil acts on
The active area of vehicle clutch rotating seal ring periphery, the pressure oil pressure at m moment is multiplied with the active area,
Obtain the external applied load F at m momentload(m)；
The thrust between the rotating seal ring of the vehicle clutch at m moment and oil-feed bushing is obtained, by the pressure
Clamp force is multiplied with coefficient of maximum static friction, obtains periphery frictional force Ff(m)；
Step 2, the sealing surface film pressure at m moment is calculated according to the governing equation of the micro- texture fluid pressure distribution in surface
Distribution pm, to the m moment sealing surface pressures distribution pmIntegrationM moment fluids are obtained to hold
Carry power FFl(m)；
Wherein, r, θ respectively coordinate of radial direction and circumferential direction, roFor the cylindrical radius surface of rotating seal ring, riFor rotation
The inner circle radius surface of sealing ring；
Step 3, expression formula F is obtained according to the stress balance relation being sealed in perpendicular to the direction of contact surfaceload(m)=
FFl(m)+Fas(m)+Ff(m), the external applied load F at the m moment that step 1 to 2 is obtainedload(m), fluid bearings power FFl(m)Rubbed with periphery
Wipe power Ff(m)Substitute into Fload(m)=FFl(m)+Fas(m)+Ff(m)Obtain rough peak bearing capacity Fas(m), then obtain the coarse of m moment
Peak contact pressure F(m)；
Step 4, using the linear velocity that sealing surface rotates against as X-axis, the rough peak contact is that Y-axis establishes two dimension seat
Mark system；The linear velocity V that sealing surface under extraction synchronization t vehicle clutch actual condition rotates against(t), rough peak connects
Touch pressure F(t), the linear velocity V that is rotated against according to the sealing surface of synchronization(t)With rough peak contact pressure F(t)Described two
A point P draws in dimension coordinate system(t)；
The abrasion under vehicle clutch actual condition is obtained according to the ratio between the wear extent using synchronization t and friction stroke
Rate η(t), in the point P of drafting(t)Place marks obtained wear rate η(t)；
Fastened in this way in the two-dimensional coordinate and draw the point at multiple moment, mark the wear rate at multiple moment, drawn
Complete wear map；
Step 5, Failure Boundaries are determined according to actual condition in the wear map, when the point of drafting exceedes the Failure Boundaries
When, determine that curve rotatory sealing is failed.
Further, determine that the linear velocity that rough peak contact and sealing surface rotate against changes according to the wear map
When wear rate change.
Further, the size of wear rate when determining that curve rotatory sealing is failed according to the wear map, rotates for analysis
The abrasion mechanism of sealing provides data information.
Beneficial effect：
Because vehicle operating status is complicated and changeable, rotatory sealing is often in mixed lubricating state, and fretting wear is more serious,
For there is the rotatory sealing of the micro- texture in surface, wear map ordinate uses rough peak contact, can more embody solid the present invention
The substantive characteristics of friction is contacted, the size of wear rate when can determine that curve rotatory sealing failure according to wear map, according to failure side
Boundary can determine that the maximal work ability of rotatory sealing, can determine that rough peak contact and sealing surface rotate against according to wear map
Linear velocity change when wear rate change, be only analysis rotatory sealing abrasion mechanism provide data information, and to point
Analysis abrasion mechanism is more convenient, and more accurately, lubricating status and working life can be effectively predicted, to instruct actual engineering design to provide
With reference to.
Brief description of the drawings
Fig. 1 is the rotatory sealing operation principle schematic diagram of the present invention；
Fig. 2 has the micro- texture rotatory sealing wear map in surface for the present invention's.
Embodiment
The invention aims to by measuring the wear extent under the conditions of rotatory sealing mixed lubrication, draw wear map,
To instruct rotatory sealing engineering design to provide reference.Because wear problem is sufficiently complex, it is many to influence the factor of wear process, arrives
Accurately estimation and prediction only can't be carried out to wear problem with theory so far.In fact, abrasion is not by single
Mechanism is dominated, but the result of a variety of mechanism interaction.But research in the past is typically all to tend to carry out list in isolation
The research of one mechanism, and assume that some mechanism prevail, and the less relation considered between different mechanism.Wear map exists
Reflect the wear rate and abrasion mechanism under different operating modes, and difference abrasion mechanism during the change of fretting wear condition on same figure
Between transformation relation, be to carry out the most strong instrument of wear design.
Acted on as shown in figure 1, being sealed in perpendicular to the direction of contact surface by four power：External applied load Fload, fluid bearings
Power Ffl, rough peak bearing capacity Fas, periphery frictional force Ff, stress balance relation is：
Fload=Ffl+Fas+Ff (1)
Wherein external applied load can be multiplied what is directly obtained by operating pressure with active area, and periphery frictional force is compressed by normal direction
Power and the product of coefficient of maximum static friction obtain.But fluid bearings power FflSolution it is cumbersome, due to the presence of the micro- texture of table, nothing
Method obtains FflAnalytical expression.The governing equation of the micro- texture fluid pressure distribution in surface is the Reynolds side under liquid cylindrical coordinate
Journey：
In formula (2), r, θ are respectively the coordinate of radial direction and circumferential direction；H is thickness of liquid film；μ is that lubricant medium power glues
Degree；ρ is lubricant medium density；P is film pressure；ω is rotary shaft angular velocity of rotation.
Sealing surface pressure distribution p can be obtained by solving equation (2) using numerical algorithm, and fluid bearings power can be integrated by pressure
Obtain：
Rough peak bearing capacity F can be obtained by formula (1) and (3)as, and then obtaining rough peak contact, i.e. wear map is indulged
Coordinate.
Therefore, the automobile-used rotatory sealing abrasion analysis method for having the micro- texture in surface of the invention, it comprises the following steps：
Step 1, obtain the pressure oil pressure needed for the vehicle clutch actual condition at m moment and pressure oil acts on
The active area of vehicle clutch rotating seal ring periphery, the pressure oil pressure at m moment is multiplied with the active area,
Obtain the external applied load F at m momentload(m)；
The thrust between the rotating seal ring of the vehicle clutch at m moment and oil-feed bushing is obtained, by the pressure
Clamp force is multiplied with coefficient of maximum static friction, obtains periphery frictional force Ff(m)；
Step 2, the sealing surface film pressure at m moment is calculated according to the governing equation of the micro- texture fluid pressure distribution in surface
Distribution pm, to the m moment sealing surface pressures distribution pmIntegrationM moment fluids are obtained to hold
Carry power FFl(m)；
Wherein, r, θ respectively coordinate of radial direction and circumferential direction, roFor the cylindrical radius surface of rotating seal ring, riFor rotation
The inner circle radius surface of sealing ring；
Step 3, expression formula F is obtained according to the stress balance relation being sealed in perpendicular to the direction of contact surfaceload(m)=
FFl(m)+Fas(m)+Ff(m), the external applied load F at the m moment that step 1 to 2 is obtainedload(m), fluid bearings power FFl(m)Rubbed with periphery
Wipe power Ff(m)Substitute into Fload(m)=FFl(m)+Fas(m)+Ff(m)Obtain rough peak bearing capacity Fas(m), then obtain the coarse of m moment
Peak contact pressure F(m)；
Step 4, using the linear velocity that sealing surface rotates against as X-axis, the rough peak contact is that Y-axis establishes two dimension seat
Mark system；The linear velocity V that sealing surface under extraction synchronization t vehicle clutch actual condition rotates against(t), rough peak connects
Touch pressure F(t), the linear velocity V that is rotated against according to the sealing surface of synchronization(t)With rough peak contact pressure F(t)Described two
A point P draws in dimension coordinate system(t)；
The abrasion under vehicle clutch actual condition is obtained according to the ratio between the wear extent using synchronization t and friction stroke
Rate η(t), in the point P of drafting(t)Place marks obtained wear rate η(t)；
Fastened in this way in the two-dimensional coordinate and draw the point at multiple moment, mark the wear rate at multiple moment, drawn
Complete wear map；
Step 5, Failure Boundaries are determined according to actual condition in the wear map, when the point of drafting exceedes the Failure Boundaries
When, determine that curve rotatory sealing is failed.
Wear rate when determining that the linear velocity that rough peak contact and sealing surface rotate against changes according to the wear map
Change.
The size of wear rate when determining that curve rotatory sealing is failed according to the wear map, to analyze the abrasion of rotatory sealing
Mechanism provides data information.
As shown in Fig. 2 abscissa, which is sealing surface, rotates against linear velocity, ordinate is rough peak contact, wear rate
For wear extent and the ratio between the stroke that rubs, wear rate is determined by the size of each operating point wear extent.Curve in wear map represents
Failure Boundaries, it will be failed when duty parameter exceedes this curve rotatory sealing.Wear map, which is clearly show under different operating modes, to be rotated
The wear extent of sealing.Especially, using rough peak contact as ordinate, the micro- texture hydrodynamic effect in surface is effectively eliminated
Influence, better illustrate due to the changing rule of rough peak contact condition difference wear extent, for analyzing different operating modes
Abrasion mechanism provides more essential parameter reference.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Know those skilled in the art when can be made according to the present invention it is various it is corresponding change and deformation, but these corresponding change and become
Shape should all belong to the protection domain of appended claims of the invention.
Claims (3)
- A kind of 1. automobile-used rotatory sealing abrasion analysis method for having the micro- texture in surface, it is characterised in thatStep 1, the pressure oil pressure needed for the vehicle clutch actual condition at acquisition m moment and pressure oil act on automobile-used The active area of clutch rotating seal ring periphery, the pressure oil pressure at m moment is multiplied with the active area, is obtained The external applied load F at m momentload(m)；The thrust between the rotating seal ring of the vehicle clutch at m moment and oil-feed bushing is obtained, by the thrust It is multiplied with coefficient of maximum static friction, obtains periphery frictional force Ff(m)；Step 2, the sealing surface film pressure distribution at m moment is calculated according to the governing equation of the micro- texture fluid pressure distribution in surface pm, to the m moment sealing surface pressures distribution pmIntegrationObtain m moment fluid bearings power FFl(m)；Wherein, r, θ respectively coordinate of radial direction and circumferential direction, roFor the cylindrical radius surface of rotating seal ring, riFor rotatory sealing The inner circle radius surface of ring；Step 3, expression formula F is obtained according to the stress balance relation being sealed in perpendicular to the direction of contact surfaceload(m)=FFl(m)+ Fas(m)+Ff(m), the external applied load F at the m moment that step 1 to 2 is obtainedload(m), fluid bearings power FFl(m)With periphery frictional force Ff(m)Substitute into Fload(m)=FFl(m)+Fas(m)+Ff(m)Obtain rough peak bearing capacity Fas(m), the rough peak for then obtaining the m moment connects Touch pressure F(m)；Step 4, using the linear velocity that sealing surface rotates against as X-axis, the rough peak contact is that Y-axis establishes two-dimensional coordinate System；The linear velocity V that sealing surface under extraction synchronization t vehicle clutch actual condition rotates against(t), rough peak contact Pressure F(t), the linear velocity V that is rotated against according to the sealing surface of synchronization(t)With rough peak contact pressure F(t)In the two dimension Coordinate system draws a point P(t)；The wear rate under vehicle clutch actual condition is obtained according to the ratio between the wear extent using synchronization t and friction stroke η(t), in the point P of drafting(t)Place marks obtained wear rate η(t)；Fastened in this way in the two-dimensional coordinate and draw the point at multiple moment, marked the wear rate at multiple moment, complete Wear map；Step 5, Failure Boundaries are determined according to actual condition in the wear map, when the point of drafting exceedes the Failure Boundaries, Determine that curve rotatory sealing is failed.
- 2. the automobile-used rotatory sealing abrasion analysis method as claimed in claim 1 for having the micro- texture in surface, it is characterised in that according to The wear map determines the change of wear rate when the linear velocity that rough peak contact and sealing surface rotate against changes.
- 3. the automobile-used rotatory sealing abrasion analysis method as claimed in claim 1 for having the micro- texture in surface, it is characterised in that according to The wear map determines the size of wear rate during curve rotatory sealing failure, and data are provided to analyze the abrasion mechanism of rotatory sealing Data.
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| CN201347998Y (en) * | 2008-11-05 | 2009-11-18 | 北京理工大学 | Rotary sealing ring for wet clutch |
| CN101865289A (en) * | 2010-06-23 | 2010-10-20 | 北京理工大学 | Sealing ring with isobathic rectangular groove on end surface |
| CN201950742U (en) * | 2010-12-16 | 2011-08-31 | 青岛新华青橡胶机械有限公司 | Oil filling sealing device for rubber-plastic pressurizing turnover internal mixer |
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| "nonlinear dynamic analysis of rotary seal ring considering creep rotation";yimin zhao etal;《tribology international》;20140928;第82卷;第101-109页 * |
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