Graphite packing, sɛ́ ade a ɛkorɔn-adeyɛ a wɔde hyɛ mu no, wɔde di dwuma kɛse wɔ nnuru, petroleum, ahoɔden, ne mfiri a wɔyɛ mu. Ne soro-temperature ne corrosion resistance, ne ne ho-aduru a ɛma ɛyɛ mmerɛw no, ma ɛyɛ ade titiriw wɔ mfiridwuma mu nsɔano nhyehyɛe mu. Nanso, sɛ wɔde di dwuma ɔkwammɔne so a, ebetumi ama nsɔano no asɛe, nsu a ɛretu, na mpo nneɛma a wɔde di dwuma no asɛe. Enti, sɛnea wobetumi ayɛ graphite a wɔde boaboa nneɛma ano no yiye no ho nimdeɛ a ɛfata no ho hia yiye.
1. Graphite packing a wɔbɛpaw na wɔadi kan ayɛ ho adwuma .
Sɛ worepaw graphite packing a, ɛho hia sɛ wogyina adwumayɛ tebea pɔtee bi so kyerɛ ɔkwan a ɛfata (te sɛ ɔhyew, nhyɛso, ne nsɛm ho amanneɛbɔ a ɛyɛ mmerɛw). Graphite a wɔtaa de kyekyere nneɛma ho no bi ne graphite a wɔatrɛw mu ne graphite a wɔde ahyɛ mu (te sɛ resin, dade, anaa polytetrafluoroethylene a wɔde ahyɛ mu). Wɔ-temperature ne high-nhyɛsoɔ mpɔtam, High-Purity expanded graphite anaa metal-impregnated graphite yɛ kamfo kyerɛ sɛ ɛbɛma ne mfiri ahoɔden ne nsuo a ɛtumi fa mu no ayɛ kɛseɛ.
Ɛsɛ sɛ wodi kan sa graphite packing no yiye ansa na wɔde adi dwuma. Nea edi kan no, hwɛ sɛnea nneɛma a wɔde ahyɛ mu no mudi mu kura mu hwɛ sɛ ɛrensɛe anaasɛ efĩ biara nni mu. Nea ɛto so abien no, sɛ ade a wɔde ahyɛ mu no wɔ roll anaa block kwan so a, ɛsɛ sɛ wotwa no tenten a ɛfata a egyina nsɔano no nsusuwii so, na ɛhwɛ hu sɛ anoano a wɔatwa no yɛ mmerɛw na akwati burrs a ebetumi aka sealing effect no. Wɔ graphite packing a wɔde ahyɛ mu no ho no, hwɛ hu sɛ layer a wɔde ahyɛ mu no ntutu anaasɛ ɛnsɛe. Sɛ ɛho hia a, wobetumi ayɛ polishing a emu yɛ hare na ama nea ɛwɔ soro no atu mpɔn.
2. Nneɛma a wɔde kyekyere nneɛma ne nhyɛso sohwɛ .
Nneɛma a wɔde kyekyere graphite a wɔde kyekyere nneɛma ho no nya nsɔano adwumayɛ so nkɛntɛnso tẽẽ. Wɔ packing mu no, ɛsɛ sɛ wodi nnyinasosɛm a ɛne "layered compaction" no akyi, na ɛhyɛ sealing cavity no ma kurukuruwa biako biako. Hwɛ sɛ wɔde 90℃-120 digrii a ɛyɛ kurukuruwa no ayɛ nsɔe a ɛkɔ so no anoano a wɔatwitwa no anoano. Wɔkamfo kyerɛ sɛ fa packing hook anaa press adwinnade a wɔatu ho ama di dwuma na ama woakwati manual compression tẽẽ, a ebetumi ama packing deformation a ɛnteɛ aba.
Compression yɛ parameter a ɛho hia ma graphite packing. Nhyɛso a ɛboro so betumi ama nneɛma a wɔde ahyɛ mu no ayɛ den, ayɛ basaa kɛse, na mpo asɛe ade wɔ nsɔano no so; Ɛnyɛ den sɛ nhyɛso a ɛnnɔɔso no betumi ama nsu no ayow. Mpɛn pii no, ɛsɛ sɛ wɔhwɛ nea wɔde ahyɛ mu a edi kan no so wɔ 15%-30% wɔ axial clearance no mu, na ɛsɛ sɛ wɔde nkakrankakra yɛ nsakrae wɔ packing no mu ma ɛyɛ nea eye sen biara denam gland no so. Wɔ nsɔano a ɛyɛ nnam (te sɛ nea ɛwɔ nnua a ɛredinhyia so anaasɛ abaa a ɛne no di nsɛ so) no, kyekyere ntini no mu ntini no mu denneennen mpɛn pii. Sɛ wohyɛ no den wie a, fa nnwinnade no di dwuma na hwɛ sɛ nsu no retu anaa kosi sɛ wobetumi asɔ nsɔano a ɛyɛ den.
3. Adwumayɛ, nsiesie, ne ɔhaw ahorow a wodi ho dwuma .
Graphite packing betumi anya nsu a ɛtwetwe kakra bere a wɔreyɛ adwuma mfiase no. Eyi yɛ ade a ɛfata na mpɛn pii no wobetumi ayi afi hɔ denam ntini no a wɔbɛma ayɛ den nkakrankakra no so. Nanso, sɛ nsu a ɛtwetwe no kɔ so anaasɛ ɛkɔ so yɛ kɛse a, ɛsɛ sɛ wɔhwehwɛ nsɛm a edidi so yi mu:
1.Gland overtightened anaa undertightened: Fa torque wrench di dwuma fa hyɛ bolt tightening force no mu den na amma adwennwene a ɛwɔ localized stress concentration no mu.
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3.Media compatibility: Sɛ sealing medium no kura hard particles (te sɛ slurry anaa sand) a, wɔkamfo kyerɛ sɛ fa carbon fiber-reinforced graphite anaasɛ composite packing a wɔde srade a wɔde aka ho ahyɛ mu.
Bere a wɔresiesie no daa no, hwɛ sɛnea wɔde nsɔano no hyɛ mu daa sɛ ɔhyew, wosow, ne nsu a ɛtwetwe anaa. Sɛ wohu sɛ adaka a wɔde nneɛma gu mu no yɛ hyew dodo (mpɛn pii no ɛnam akasakasa a ɛboro so nti) a, wobetumi de srade a ɛfata adi dwuma (te sɛ silicone ngo kakraa bi a wɔde bɛhyɛ mu) anaasɛ wɔde PTFE-impregnated graphite packing bedi dwuma de atew friction coefficient no so.
4. Akwankyerɛ ho nyansahyɛ ahorow a ɛfa adwumayɛ tebea soronko ho .
Graphite packing hwehwɛ sɛ wɔyɛ ahwɛyiye foforo bere a wɔde di dwuma wɔ adwumayɛ tebea horow a emu yɛ den mu (te sɛ ultra-ɔhyew a ɛkorɔn, mmeae a ɛyɛ hyew kɛse, anaasɛ nuklea mframa a ɛbɔ):
•Ultra-high temperature environments (>600℃): Fa High-Purity trɛw graphite anaa composite metal-aduru a wɔde ahyɛ mu no di dwuma, na fa onwini nhyehyɛe ka ho.
•Sɛnea ɛbɛyɛ a nsɛm a ɛyɛ mmerɛw kɛse (te sɛ acid a ano yɛ den ne nnyinaso): Wɔpɛ sɛ wɔde graphite packing a wɔde PTFE anaa ceramic coating ahyɛ mu ma no ma nnuru a wɔde gyina ano no yɛ kɛse.
•For high-pressure sealing (>30 MPa): Fa Multi-layer soro-Density graphite packing ne dadeɛ bellows di dwuma ma aboafoɔ nsɔano.
Awie
Graphite packing wɔ adwumayɛ mu mfaso kɛse, nanso sɛnea etu mpɔn no gyina adwumayɛ ne nsiesie a ɛfata so kɛse. Ɛdenam nyansahu mu a wɔpaw, nneɛma a wɔde hyɛ mu ma a wɔahyɛ da ayɛ, nhyɛso a ɛfata, ne nsiesie a wɔyɛ no daa so no, wobetumi atrɛw nsɔano nkwa nna mu kɛse na wɔatumi ahwɛ ahu sɛ nnwinnade no bɛyɛ adwuma yiye. Wɔ dwumadie a mfaso wɔ so mu no, wɔkamfo kyerɛ sɛ wɔbɛka adwumayɛ tebea pɔtee bi abom na wɔabisa wɔn a wɔde nneɛma ma anaasɛ wɔn a wɔyɛ nsɔano ho abenfoɔ nsɛm bere a ɛho hia na ama wɔatumi de graphite a wɔde kyekyere nneɛma no adi dwuma yie.
