Dɛn nti na ntontom valve taa yɛ cavitation?

sɛnea ɛyɛ mmerɛw sɛ .Nwansena valve ahorow .to cavitation ne wɔn structure characteristics, fluid dynamics characteristics, ne operating conditions wɔ abusuabɔ kɛse. Nneɛma pɔtee a enti a ɛte saa ne sɛ:

1. Nwansena valve nhyehyɛe no ma mpɔtam hɔ mmeae a ɛwɔ nhyɛso a ɛba fam no ba .

Nneɛma a ɛma ntontom valve ahorow no bue na ɛto mu no yɛ ntontom mprɛte a ɛte sɛ diski. Sɛ nsu no dannan ne ho a, ɛsɛ sɛ ɛsen fa ntontom mprɛte no ano. Mpɔtam bi a ɛwɔ mpɔtam hɔ a nhyɛso a ɛba fam no bɛyɛ wɔ ntontom mprɛte no akyi (afã a ɛwɔ nsu no ase). Sɛ nsu no nhyɛso no kɔ fam sen vapor nhyɛso a ɛyɛ ma no a, mframa a apete wɔ nsu no mu no bɛtɔ na ayɛ ahurututu, a ɛyɛ cavitation no mfiase.

Nsɛm tebea a ɛtaa ba: Wɔ nhyɛso kɛse mu nsonsonoe anaasɛ nsu a ɛsen ntɛmntɛm tebea horow ase no, nsu a ɛsen ntɛmntɛm a ɛwɔ ntontom mprɛte no ano no kɔ soro kɛse. Sɛnea Bernoulli nnyinasosɛm kyerɛ no, nsu a ɛsen ntɛmntɛm a ɛkɔ soro no ma nhyɛso so tew, na ɛma mmeae a nhyɛso sua no yɛ kɛse bio na ɛma tebea horow ma cavitation.

2. Nkɛntɛnso a nsu a ɛyɛ basabasa ne ahurututu a ɛhwe ase ba .

Sɛ nsu no de ahurututu kɔ beae a nhyɛso kɛse wom no (te sɛ nsu a ɛwɔ fam a ɛwɔ nsu no ase a .Nwansena valve ahorow .), ahurututu no bɛhwe ase ntɛmntɛm, na ɛbɛma micro jets a ɛka dade no ani. Mpɛn dodow a saa nkɛntɛnso yi taa ba no dɔɔso yiye (ɛkɔsi mpɛn mpempem du du wɔ sekan biako mu), na ɛde nkakrankakra a ɛyɛ mmerɛw na ɛpaapae dade no ani, na awiei koraa no, ɛsɛe ade a wɔde hyɛ mu no.

Nsɛm a wɔde boa: Nsɔhwɛ ahorow ada no adi sɛ tumi a ɛde nkɛntɛnso ba denam bubble a ɛhwe ase so no betumi adu megapascals ɔhaha pii ho, a ɛboro ɔbrɛ ahoɔden a ɛwɔ dade nneɛma a ɛyɛ mmerɛw mu, na ɛyɛ ade titiriw a ɛma cavitation sɛe no.

3. Nwansena valve ahorow a ɛma ɛyɛ adwuma yiye no ma asiane a ɛwɔ hɔ sɛ wobenya cavitation no yɛ kɛse .

Wɔtaa de nwansena valve di dwuma de hwɛ sɛnea nsu no sen, nanso sɛ wobue no sua (<15 °~20 °) a, nsu no fa ɔkwan ketewaa a ɛda ntontom mprɛte ne valve no ntam no mu, na ɛma nsu a ɛsen no ahoɔhare kɔ soro kɛse, ɛtew nhyɛso so kɛse, na ɛma asiane a ɛwɔ hɔ sɛ wobenya no yɛ kɛse kɛse.

Engineering Case: Wɔ inlet valve anaa sewage treatment system a ɛwɔ hydropower station mu no, sɛ butterfly valve no wɔ opening adjustment tebea ketewaa bi mu bere tenten a, cavitation pits bɛda adi ntɛmntɛm wɔ valve mprɛte no akyi, na ɛbɛma sealing no adi nkogu na ɛhwehwɛ sɛ wɔtaa sesa valve mprɛte anaa sealing ring no.

4. Nkɛntɛnso a ɛwɔ mfinimfini su ne adwumayɛ tebea horow mu .

Nneɛma nketenkete a ɛwɔ medium mu: Sɛ nsuo no wɔ nneɛma nketenkete a ɛyɛ den te sɛ sediment ne metal oxides a, micro jet a ɛfiri cavitation mu ba no bɛsoa nneɛma nketenkete no akɔka sealing surface no, ayɛ "ererosion cavitation" composite damage na ɛbɛma huammɔdi no ayɛ ntɛmntɛm.

Ɔhyew a ɛkɔ soro anaasɛ ɛyɛ mmerɛw sɛ ɛbɛhyew: Ɔhyew a ɛkɔ soro no betumi atew nsu a ɛwɔ soro no so na ama ahurututu no ayɛ kɛse; Nneɛma a ɛyɛ mmerɛw sɛ ɛbɛsɛe ade no betumi ama tumi a dade nneɛma wɔ no ayɛ mmerɛw, na nkɛntɛnso abien no ma ntontom valve ahorow no ntumi nyɛ adwuma yiye.

5. Anohyeto ahorow a ɛwɔ butterfly valve ahorow ne ne nsusuwii mu .

Single eccentric/center butterfly valve: ɛho hia sɛ wosusuw ɔkwan a nsu no fa so (valve plate biased downstream) ho. Reverse installation bɛsɛe flow field no a ɛyɛ den no na ama asiane a ɛwɔ cavitation mu no ayɛ kɛse.

Vertical pipeline installation: valve mprɛte no ankasa mu duru betumi ama nhyɛso a ɛnteɛ aba nsɔano no so, na ɛde mpɔtam hɔ nhyɛso so atew na ɛde cavitation aba.

Nwansena valve a wɔatoto mu a ɛyɛ mmerɛw: Rɔba a wɔde hyɛ mu no yɛ nea ɛyɛ mmerɛw sɛ ɛbɛpae na asɛe wɔ cavitation impact ase, bere a sealed a ɛyɛ den .Nwansena valve ahorow ., ɛwom sɛ ɛko tia nsu a ɛreworo so de, nanso ɛho ka yɛ kɛse na ɛho ka sua.