Heat Sink Surface Roughness: Qhov Kawg Qhia (Ra, Performance & Measurement)

Heat Sink Surface Roughness: Qhov Kawg Qhia (Ra, Performance & Measurement)

Lub roughness ntawm lub dab dej kub

Hauv kev tsim hluav taws xob hluav taws xob tsim hluav taws xob, ntau tus neeg tsom mus rau cov khoom siv (txhuas, tooj liab) thiab cov qauv (fins, pin fins, extrusion vs txias forging), tab sis feem ntau saib xyuas qhov nthuav dav - qhov roughness ntawm lub dab dej kub.
Deg roughness ncaj qha cuam tshuam rau thermal conductivity, tiv thaiv thermal, thiab txawm huab cua convection tshav kub hloov efficiency, yog li nws yuav tsis raug ignored nyob rau hauv siab -kev ua tau zoo tshav kub dissipation tsim.

Dab tsi yog qhov roughness ntawm lub dab dej kub?

Deg roughness (Ra, Arithmetic Nruab Nrab Roughness) yog hais txog tus nqi nruab nrab ntawm micro roughness ntawm qhov chaw ua haujlwm, qhia hauv μm (micrometers).

Rau cov dab dej kub, feem ntau yog ob hom:

1. Kev sib cuag hauv qab nto roughness: lub interface qhov twg lub dab dej kub ncaj qha hu rau lub nti / lub zog ntaus ntawv.
2. Nto roughness ntawm fins: Lub tshav kub dissipation nto ntawm lub dab dej kub muaj feem xyuam rau cua convection cua sov hloov.

Qhov cuam tshuam ntawm Nto Roughness ntawm Kev Ua Haujlwm Kub Kub

1. Thermal interface (hauv qab)

Kev ntxhib los mos ntau dhau tuaj yeem ua rau qhov chaw sib cuag tsis txaus, nce thermal kuj, thiab txo thermal conductivity efficiency.
Feem ntau yuav tsum tau: Ra Tsawg dua lossis sib npaug li 1.6 μ m, thiab qee qhov siab - kev ua haujlwm txawm tias yuav tsum tau Ra Less dua lossis sib npaug li 0.8 μ m, ua ke nrog cov khoom siv thermal interface (TIM).

2. Thaum tshav kub kub dissipation fins (nto)

Nruab nrab roughness yog qhov zoo rau kev txhim kho airflow cuam tshuam thiab txhim kho cov cua kub hloov pauv.
Ntau dhau → txwv convection efficiency.
Kev ntxhib dhau → plua plav yog feem ntau ua raws, thiab ntev -lub sij hawm cua sov dissipation kev ua tau zoo txo.
Feem ntau, nws tuaj yeem tswj tau hauv Ra 3.2-6.3 μ m.

Common Manufacturing Processes thiab Roughness Levels

Yuav Ua Li Cas Ntsuas Nto Roughness ntawm Kub Sinks?

1. Stylus Profilometer

Siv ib rab koob los swb rau ntawm qhov chaw ntawm lub workpiece, ntsuas qhov siab hloov, thiab tso tawm tus nqi Ra.
High precision thiab qhov no yog txoj hauv kev tshaj plaws.

2. Optical Interferometry

Kev txheeb xyuas qhov hloov pauv ntawm qhov chaw los ntawm kev tshuaj ntsuam xyuas qhov muag yog qhov tsim nyog rau kev kuaj xyuas cov npoo du.

3. Coordinate Measuring Machine (CMM) nrog Surface Module

Nws tuaj yeem ua ke nrog kev ntsuas qhov loj me thiab ntsuas qhov roughness.

4. Kev tsom xam tsom xam

Siv lub tshuab ntsuas hluav taws xob los saib xyuas lub microstructure thiab soj ntsuam qhov zoo ntawm qhov roughness.

Xaus

Lub roughness ntawm lub dab dej kub, txawm hais tias nthuav dav, plays lub luag haujlwm tseem ceeb hauv kev tswj xyuas thermal:
Qhov me me ntawm qhov roughness ntawm qhov chaw hauv qab, qhov zoo dua (kom paub meej thermal contact).
Qhov saum npoo ntawm cov fins yog me ntsis ntxhib (txhim kho cov cua sov hloov pauv).
Cov txheej txheem kev ua haujlwm sib txawv txiav txim siab txog qib ntawm roughness, thiab thaum tsim, nws yog ib qho tsim nyog yuav tsum xav txog ob qho tib si kev ua tau zoo thiab tus nqi.
Rau siab -cov ntawv siv fais fab, nws raug pom zoo kom ua tib zoo saib cov khoom, qauv, roughness, thiab cov txheej txheem thaum xaiv cov dab dej kub, thiab tswj lawv los ntawm cov kev ntsuam xyuas txhim khu kev qha kom ua tiav cov cua sov zoo tshaj plaws.
 

Cim npe nrov: Thaum tshav kub kub dab dej nto roughness: qhov kawg qhia (ra, kev ua tau zoo & ntsuas), Tuam Tshoj, lwm tus neeg, manufacturers, hoobkas, customized, dawb qauv, ua nyob rau hauv Suav teb