CN1020352C - Design method of stepped shaft transition curve - Google Patents
Design method of stepped shaft transition curve Download PDFInfo
- Publication number
- CN1020352C CN1020352C CN90100323A CN90100323A CN1020352C CN 1020352 C CN1020352 C CN 1020352C CN 90100323 A CN90100323 A CN 90100323A CN 90100323 A CN90100323 A CN 90100323A CN 1020352 C CN1020352 C CN 1020352C
- Authority
- CN
- China
- Prior art keywords
- curve
- stepped shaft
- transition curve
- design
- stress concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000007704 transition Effects 0.000 title claims abstract description 15
- 238000013461 design Methods 0.000 title abstract description 18
- 238000000034 method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000012141 concentrate Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011960 computer-aided design Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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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
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/70—Diameters; Radii
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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
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
Landscapes
- Earth Drilling (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The present invention puts forward a new method for designing the transition curve of a stepped shaft. A streamline linear line is used for taking the place of a transitional circular angle curve or a hyperbolical arc curve which is designed in a traditional way, thereby effectively reducing a stress concentration factor, reducing stress concentration and prolonging the service life of components. The present invention has the advantages of material saving and high economic benefit, and the method is suitable for the design of various components of the stepped shaft.
Description
The invention belongs to axial workpiece, a kind of multidiameter shaft with novel transition curve.
Industrial various machinery, particularly rotary system all be unable to do without axle system, and this axle is generally shouldered multidiameter shaft.At the convex shoulder place, traditional design adopts the circular curve transition, concentrates to reduce stress.In nuclear power station, power station, large-scale mine mining apparatus, petrochemical equipment, offshore oil production, drilling equipment, communications and transportation and the aerospace equipment, crucial axial workpiece, dangerous position cause destruction mostly at the transition curve place because stress is concentrated.The Designer adopts different designs scheme, process engineering to reduce stress and concentrates.In recent years, to important revolution, the axle class transition curve in the vibratory equipment begins to adopt the double curvature circular curve to replace the curvature fillet.For example: the electric power wheel self-discharging vehicle of U.S. WABCO company development, front axle designs its knuckle by ρ
1=51mm, ρ
2The double curvature curve of=13mm constitutes, and sees Fig. 1.Concentrate with the stress that reduces dangerous position.But this axle is the transition curve design still belongs to traditional design.Usually stress concentration factor is about 1.4～1.6.
The objective of the invention is provides a kind of multidiameter shaft with novel transition curve in order to reduce stress concentration factor effectively, finds out the optimal design curve of stepped shaft transition curve, reduces stress and concentrates, and improves the multidiameter shaft life-span.Thereby the saving material is increased economic efficiency.
Among the present invention, a kind of multidiameter shaft with novel transition curve has been proposed for achieving the above object.Transition curve adopts streamlined curve to replace the fillet or the double curvature circular curve of single radius arc, sees Fig. 2.Streamlined curve's equation is:
Wherein:
A-point of contact coordinate; The v-calculating parameter, interval (0～5); The axial dimension that x, r are respectively curve reaches radially radius.
Adopt said method that stress concentration factor is reduced to about 1.10～1.05 by 1.4～1.6, stress concentration factor has reduced by 20～30%, correspondingly improves part several times fatigue life.Press the fatigue strength design and consider, because the reduction of working stress, adopting the part diameter of axle of this programme design only is 58.4% of the original design scheme diameter of axle, and under same carrying operating conditions, every axle can be saved material up to about 60%.Can give and see this invention design method design multidiameter shaft of employing, save material, economic benefit is very considerable.
Draw streamlined curve and can adopt tradition drawing design or computer-aided design and drafting.Can use template cutters processing, rolling finishing or numerical control machine tool processing.
Take 154 tons of electric power wheel self-discharging vehicles as example, this car is the glory-hole winning apparatus, the dangerous position of its front axle is the stepped shaft transition curve district, and is decided by the concentrated size of stress at fillet place the fatigue life of axle, and the hyperbolicity circular curve multidiameter factor of stress concentration of U.S.'s design is 1.41. The streamlined Curve Design factor of stress concentration of the present invention is 1.05, and the factor of stress concentration has reduced by 25.7%, surplus part life can improve 10 times. This streamlined easement curve is applicable to various multidiameters.
Claims (1)
- A kind of multidiameter shaft with novel transition curve is characterized in that transition curve adopts streamlined curve, and its equation is:
Wherein: a-point of contact coordinate; The v-calculating parameter; Interval is (0-5); The axial dimension of x, r curve and radial coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90100323A CN1020352C (en) | 1990-01-17 | 1990-01-17 | Design method of stepped shaft transition curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90100323A CN1020352C (en) | 1990-01-17 | 1990-01-17 | Design method of stepped shaft transition curve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1053478A CN1053478A (en) | 1991-07-31 |
| CN1020352C true CN1020352C (en) | 1993-04-21 |
Family
ID=4876598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90100323A Expired - Fee Related CN1020352C (en) | 1990-01-17 | 1990-01-17 | Design method of stepped shaft transition curve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020352C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160108895A1 (en) * | 2014-10-17 | 2016-04-21 | General Electric Company | Method for machining a shaft and apparatus made thereby |
-
1990
- 1990-01-17 CN CN90100323A patent/CN1020352C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1053478A (en) | 1991-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |