90% ntawm mechanical engineers tsis nco qab! Ultra paub meej cov ntsiab lus tseem ceeb ntawm kev tsim kho tshuab

Hnub no peb yuav qhia qee qhov kev paub txog kev tsim kho tshuab, vam tias yuav pab tau rau txhua tus.
1. Cov ntaub ntawv tsis ua haujlwm ntawm cov khoom siv tshuab: tag nrho cov pob txha, qhov seem deformation ntau dhau, kev puas tsuaj ntawm qhov chaw (corrosion, hnav, thiab kev sib cuag qaug zog), tsis ua haujlwm los ntawm kev ua haujlwm ib txwm muaj.

2. Cov kev xav tau uas yuav tsum tau ua raws li kev tsim qauv: cov kev cai kom tsis txhob ua tsis tiav nyob rau hauv lub neej ua ntej (lub zog, tawv, lifespan), cov txheej txheem cov txheej txheem, cov kev xav tau nyiaj txiag, cov kev xav tau tsis zoo, thiab cov kev xav tau ntawm kev ntseeg siab.
3. Cov qauv tsim rau qhov chaw: cov qauv muaj zog, cov qauv nruj, cov qauv ntawm lub neej, cov qauv kev vibration stability, thiab cov qauv kev ntseeg tau.
4. Kev tsim qauv rau qhov chaw: theoretical design, empirical design, and model testing design.
5. Cov khoom siv feem ntau siv rau cov khoom siv tshuab: cov khoom siv hlau, cov khoom siv polymer, cov ntaub ntawv ceramic, thiab cov khoom sib xyaw.
6. Lub zog ntawm qhov chaw tau muab faib ua lub zog muaj zog zoo li qub thiab lub zog muaj zog sib txawv.
7. Kev ntxhov siab piv: r=-1 yog qhov sib npaug ntawm kev ntxhov siab; R=0 yog lub zog ntawm lub zog ntawm lub zog.
8. theem BC yog strain fatigue (low voj voog qaug zog); lub CD theem yog finite lub neej qaug zog; Cov kab ntu tom qab taw tes D sawv cev rau lub neej infinite qaug zog theem ntawm tus qauv; Point D sawv cev rau kev tiv thaiv kev qaug zog.
9. Kev ntsuas los txhim kho lub zog qaug zog ntawm qhov chaw: txo qis qhov cuam tshuam ntawm kev ntxhov siab ntawm qhov chaw (load txo qhov grooves, qhib lub nplhaib grooves), xaiv cov khoom uas muaj zog qaug zog, thiab qhia cov txheej txheem kho cua sov thiab cov txheej txheem ntxiv uas tuaj yeem txhim kho qhov qaug zog. lub zog ntawm cov ntaub ntawv.
10. Kev sib txhuam zawv zawg: kev sib txhuam qhuav, kev sib txhuam ntawm ciam teb, kev sib txhuam dej, thiab kev sib txhuam sib xyaw.
11. Cov txheej txheem hnav ntawm qhov chaw: khiav hauv theem, ruaj khov theem, hnyav hnav theem; Kev siv zog yuav tsum tau ua kom luv luv ntawm kev khiav hauv lub sijhawm, ncua lub sijhawm hnav ruaj khov, thiab ncua qhov pib ntawm kev hnav hnyav.

12. Kev faib tawm ntawm kev hnav: adhesive hnav, abrasive hnav, qaug zog hnav, yaig hnav, corrosion hnav, thiab micro txav hnav.
13. Lubricants muab faib ua plaub hom: roj, kua, khoom, thiab semi-solid; Lubricating roj yog muab faib ua calcium raws roj, nano raws roj, lithium raws roj, thiab txhuas raws roj roj.
14. Cov xov profile ntawm kev sib txuas zoo tib yam yog daim duab peb sab sib npaug, uas muaj kev ua haujlwm zoo ntawm tus kheej; Qhov kev sib kis tau zoo ntawm cov kab sib txuas sib txuas yog siab dua li ntawm lwm cov xov; Trapezoidal kis xov yog feem ntau siv xov kis tau tus mob.
15. Cov kev sib txuas uas siv ntau zaus yuav tsum tau kaw tus kheej, yog li cov xov ib leeg feem ntau siv; Cov xov kis tau zoo yuav tsum muaj kev sib kis tau zoo, yog li ob lossis peb zaug xov feem ntau siv.
16. Ib qho yooj yim bolt kev twb kev txuas (nrog los ntawm lub qhov los yog hinged qhov ntawm cov txuas txuas), ob lub taub hau ntsia hlau txuas, ntsia hlau txuas, thiab teeb ntsia hlau txuas.
17. Lub hom phiaj ntawm kev sib txuas ua ntej zawm threaded yog txhawm rau txhim kho kev ntseeg tau thiab nruj ntawm kev sib txuas, thiab tiv thaiv qhov tsis sib xws los yog cov txheeb ze slippage ntawm cov khoom sib txuas hauv qab load. Qhov teeb meem tseem ceeb nrog kev sib txuas xoob xoob yog los tiv thaiv kev sib hloov ntawm cov ntsia hlau khub hauv qab load. (Kev sib txhuam los tiv thaiv loosening, mechanical anti loosening, anti loosening ntawm ntsia hlau khub txav kev sib raug zoo)

18. Kev ntsuas los txhim kho lub zog ntawm kev sib txuas ntawm threaded: txo qhov kev ntxhov siab amplitude uas cuam tshuam rau lub zog qaug zog ntawm bolts (txo kom nruj nreem los yog ua kom qhov nruj ntawm cov khoom sib txuas), txhim kho qhov tsis sib xws ntawm kev thauj khoom ntawm cov xov hniav, txo qhov cuam tshuam. ntawm kev nyuaj siab concentration, thiab txais yuav tsim nyog txheej txheem.
19. Hom kev sib txuas tseem ceeb: tiaj tus tseem ceeb txuas (nrog lub ntsej muag ua haujlwm ntawm ob sab), kev sib txuas tseem ceeb semicircular, wedge qhov tseem ceeb txuas, tangential tseem ceeb txuas.
20. Kev sib kis tau muab faib ua hom kev sib txhuam thiab meshing hom.
21. Qhov siab tshaj plaws ntawm txoj siv tam sim no tshwm sim ntawm qhov chaw uas lub ntug nruj ntawm txoj siv tawv pib qhwv ib ncig ntawm lub rubey me me; Siv ib lub lim tiam, kev ntxhov siab hloov plaub zaug.
22. Tensioning ntawm V-siv tsav: tsis tu ncua tensioning ntaus ntawv, tsis siv neeg tensioning ntaus ntawv, tensioning ntaus ntawv siv tensioning log.
23. Tus naj npawb ntawm cov kev sib txuas hauv cov saw hlau feem ntau yog txawm tias (tus naj npawb ntawm cov hniav nyob rau hauv lub sprocket yog khib), thiab cov kev sib txuas ntau dhau yog siv thaum cov hlua cov hlua khib nyiab.
24. Lub hom phiaj ntawm cov saw hlau tensioning yog kom tsis txhob muaj cov meshing tsis zoo thiab cov saw hlau vibration thaum lub slack ntug ntawm cov saw loj dhau, thiab ua kom lub meshing lub kaum sab xis ntawm cov saw thiab sprocket.
25. Cov ntaub ntawv tsis ua haujlwm ntawm cov iav: cov hniav tawg, cov hniav hnav (qhib iav), hniav nto pitting (kaw lub zog), cov hniav adhesion, yas deformation (ridges ntawm lub log tsav thiab grooves ntawm lub log tsav).
26. Iav nto nrog hardness ntau dua 350HBS lossis 38HRS yog hu ua tawv ntsej muag hniav; Ntawm qhov tsis sib xws, nws yog cov hniav muag muag muag.
27. Kev txhim kho kev tsim khoom raug thiab txo cov iav txoj kab uas hla kom txo cov voj voog ceev tuaj yeem txo cov loads dynamic; Yuav kom txo tau qhov dynamic load, lub iav tuaj yeem raug cov hniav sab saum toj trimming; Ua cov hniav ntawm ib lub iav rau hauv ib lub nruas zoo yog los txhim kho kev faib cov hniav load.
Qhov loj ntawm txoj kab uas hla coefficient txhuas lub kaum sab xis, qhov ua tau zoo dua thiab qhov ua rau nws tus kheej kaw qhov kev ua haujlwm tsis zoo.
29. Hloov kho cov cab iav, thiab tom qab kev hloov kho, lub voj voog indexing thiab lub voj voog ntawm cov cab iav tseem nyob sib xws, tab sis cov kab ntawm cov cab iav tau hloov thiab tsis sib haum nrog nws lub voj voog indexing.
30. Kev ua tsis tau zoo ntawm cov cab iav kis tau tus mob: pitting, cov hniav hauv paus tawg, cov hniav adhesion, thiab hnav ntau dhau; Kev ua tsis tiav feem ntau tshwm sim ntawm cov kab mob cab.
31. Lub zog poob ntawm cov cab cab kaw: meshing hnav poob, kev coj tus kheej poob, thiab cov roj txaws poob thaum cov khoom nkag mus rau hauv cov roj pas dej thiab do roj.
32. Tus cab iav kis tau tus mob yuav tsum suav cov thermal tshuav nyiaj li cas raws li qhov xwm txheej uas cov cua sov tsim ib lub sij hawm sib npaug ntawm cov cua kub dissipation tib lub sijhawm. Cov kev ntsuas suav nrog kev txhim kho cov dab dej kub thiab ua kom cov cua sov ua kom sov, txhim kho lub kiv cua ntawm qhov kawg ntawm cov cab cab kom nrawm nrawm, thiab txhim kho cov kav dej txias hauv lub thawv kis.
33. Tej yam kev mob rau kev tsim hydrodynamic lubrication: Ob qhov chaw uas swb txheeb ze rau ib leeg yuav tsum tsim ib qho kev sib tshuam sib txuas; Ob qhov chaw sib cais los ntawm cov roj zaj duab xis yuav tsum muaj cov txheeb ze txaus zawv zawg ceev, thiab lawv lub zog yuav tsum cia cov roj lubricating ntws los ntawm qhov qhib loj rau hauv qhov qhib me me thiab tawm; Lubricating roj yuav tsum muaj ib tug viscosity, thiab cov roj yuav tsum txaus.
34. Cov qauv yooj yim ntawm dov bearings: lub nplhaib puab, lub nplhaib sab nraud, hydraulic lub cev, thiab cov khoom tuav.
35. 3 tapered menyuam bearings, 5 thrust pob bearings, 6 sib sib zog nqus groove pob bearings, 7 angular contact bearings, N cylindrical roller bearings 00, 01, 02, 03 feem d=10mm, 12mm, 15mm , 17mm 04 sawv cev d=20mm, 12 sawv cev d=60mm.
36. Basic rated life: 10% ntawm cov bearings nyob rau hauv ib pab pawg neeg undergo pitting puas, thiab 90% ntawm cov ceev los yog cov sij hawm ua hauj lwm uas pitting puas tsis tshwm sim yog xam raws li lub neej ntawm cov bearings.
37. Basic rated dynamic load: Lub load uas cov kabmob tuaj yeem tiv taus thaum lub neej ntawm cov kabmob yog raws nraim 106 revolutions.
38. Bearing configuration method: ob chav fulcrums yog tsau nyob rau hauv ib qho kev taw qhia, ib tug fulcrum yog tsau nyob rau hauv ob qho tib si kev taw qhia, thiab lwm yam kawg yog txhawb los ntawm lub fulcrum, thiab ob qho tag nrho yog txhawb los ntawm lub fulcrum.
39. Bearings muab faib raws li load: ncej (bending lub sij hawm thiab torque), spindle (bending moment), thiab kis ncej (torque).