Nhoroondo pfupi uye kukura kweventuri abrasive nozzles

Short History ofSandblastinguyeAbrasive Nozzles 

Maitiro ekuputira jecha akatanga kutenderera 1870 nemurume anonzi Benjamin Chew Tilghman, akaona kupfeka kwakashata pamahwindo erenje anopeperetswa nemhepo. Tilghman akacherekedzawo mabatiro anogona kuita jecha repamusoro-soro pazvinhu zvakaoma. Ipapo iyeakatanga kugadzira muchina waigona kufambisa jecha nekumhanya zvakanyanya kupfuura mhepo - uye waikwanisa kuisa pfungwa iyi kuyerera murukova rudiki. Nozzle yakasimudzwa pachikuva chinofamba, izvoinogona kushandiswa kutungamira nozzle kumativi ose substrate.

Iwe unogona kuona iyo yakapusa chimiro chejecha rejecha muchina kubva pamufananidzo uri pazasi.

Mhepo yakamanikidzwa yaipihwa nemumuromo. The blast nozzlegivesjecha kumhanya kunodiwa pakuputika kunobereka. Iyi yaive yekutanga jecha muchina, uye yekutanga kushandiswa kwemuromoinonzi straight bore nozzle.

Ukusvika pakati pema1950, mhuno dzese dzinoputitsa jecha dzakanga dzakati twasu. Vakanga vaine mukova wakavharwa, chikamu chehuro chakafanana, uye yakazara-kureba kwakatwasuka uye kubuda kwakatwasuka. Nekufamba kwenguva, vafambisi vekuputika vakaona kuti mukati memipumburu iyi payakatanga kusakara nekunyura, kuputika kwakakura uye kunobudirira kwakaguma. Kucherekedza uku kwakatungamira mukugadzirwa kweiyo venturi dhizaini.

Kuzvarwauye BudiriroyeVenturi Nozzle

Kunyangwe iyo Venturi nozzle isingaoneke mujecha kuputika kusvika kuma1950s, iyo Venturi mhedzisiro yaivepo kare kare. Hwaro hwesainzi hwekugadzira venturi hwakatanga nebasa reSwiss masvomhu uye nyanzvi yefizikisi Daniel Bernoulli, uyo akawana kuti kudzikiswa kwekumanikidzwa kwemvura kwakakonzera kuwedzera kwekukurumidza kwemvura. Akaburitsa zvakawanikwa izvi mubhuku rakeHydrodynamicamuna 1738, uye yakazozivikanwa seBernoulli's Principle.

Gare gare muma1700s, basa iri rakawedzerwa nedzidziso inopindirana kubva kuItaly fizikisi Giovanni Battista Venturi. Venturi inotendwa nekuwanikwa kwekudzikiswa kwemvura inoyerera inoitika kana mvura ichiyerera nepachikamu chakavharwa chepombi. Izvi zvakazozivikanwa seVenturi Effect. 

TheDesignyeVenturi Nozzles

The venuri nozzle yakagadzirwa in mukova wakareba wakatepa, une chikamu chipfupi chakati sandara chakatwasuka, chichiteverwa nemagumo akareba anotsauka anozowedzera paunosvika panoperera muromo.

Venturi nozzles inogona kuwedzera kugadzirwa ne 70% nokuda kwepateni hombe yeabrasive inobuda pamwe chete nekuwedzera kwevelocity yeabrasive painobuda mumuromo. Saizvozvo,thevelocity (outlet speed) yeabrasive inobuda inogona kupeta zvakapetwa kaviri yemhuno yakatwasuka, uye izvithesimba rinochenesa nzvimbo nekukurumidza.

Kaviri Venturi Blast Nozzles imhando yezvinokoshaventuri nozzle.

Thedouble venturichimiro (semufananidzo) inogona kurangarirwa semapfumbu maviri akatevedzana ane mukaha nemakomba pakati kuti abvumire kuiswa kwemweya wemuchadenga muchikamu chepasi pemvura. Mugumo wekubuda wakafarawo kupfuuramweroventure kuputikanozzle. Zvose zvinogadziriswa zvinogadzirwa kuti zviwedzere saizi ye blast pattern uye kuderedza kurasikirwa kweabrasive velocity.

BSTEC inopa yemhando yepamusoro chiyeroventurinozzles uye kaviriventurini nozzles, so kana uri mumusika uchitsvaga kusimudzira mashandiro ako,unogona kutibata kuti uwane rumwe ruzivo.