氣流霧化噴槍的設計

論文編號:JX1628  論文字數:15981.頁數:30 附任務書，開題報告，外文翻譯,CAD圖

氣流霧化噴槍的設計
摘要：高壓噴涂是一種利用壓縮空氣為動力，不直接用壓縮空氣對涂料進行霧化，它用增壓泵將涂料增壓至10Mpa-25Mpa，高壓涂料通過噴嘴的小噴孔高速噴出霧化分散成極細的霧滴，同時將霧化涂料微粒推至被涂工件表面。
    利用高速氣流而令噴槍局部真空，因而產生吸力把油漆從壺中吸到噴咀加以霧化噴出，主要作大面積噴涂，好處是油漆的霧化較佳，可以達到漆膜的厚度及光澤度要求。壓力桶為圓柱形壓力容器，一般用不銹鋼或碳鋼制作，桶蓋上設置調壓閥、壓力表及安全閥等附件，調節輸入壓縮空氣的壓力可達到輸出涂料的壓力。壓力桶有的還配置氣動攪拌器，常用壓力桶的容量為10L、20L、40L等。壓力桶結構簡單，維護方便，涂料輸出壓力較穩定，不足之處是清洗換色不便。
    空氣噴槍的空氣帽（空氣噴嘴）、噴嘴（涂料噴嘴）和頂針，習慣稱為空氣噴槍的三件套是決定空氣噴涂的涂裝質量關鍵部分。氣動雙隔膜泵，是利用壓縮空氣作動力，通過換向機構使空氣壓力作用在橫隔膜的內側，而橫隔膜的外側與泵體共同組成一個容積可以變化的涂料腔。 當左面涂料腔容積從小變大產生局部真空，下面一個單向閥開啟，上面一個單向閥關閉，涂料桶中的涂料在大氣壓力下進入左面涂料腔，而右面涂料腔容積由大變小，下面一個單向閥關閉，涂料產生壓力，頂開上面一個單向閥排出泵體。雙隔膜泵的兩側有兩個涂料腔，當一個容積由小變大，則另一個容積由大變小，周而復始，往返進行。所以雙隔膜泵的每次往復都有兩次涂料吸入和排出，使泵的輸出效率提高，而且輸出相對比較平穩。由于壓縮空氣的輸入壓力和涂料的輸出壓力的比率為1:1,故調節壓縮空氣的輸入壓力的大小可改變涂料的輸出壓力。
   高壓噴涂可以使用高粘度涂料，大面積噴涂速率達4m2/min-7m2/min，生產效率高。噴涂對涂料無壓縮空氣混入，漆霧反彈飛散的現象較空氣噴涂少，降低了涂料消耗，改善了環境污染。 高壓無氣噴涂的出漆量較大且漆霧細度不夠柔軟，涂層厚度不易控制。精裝飾涂膜噴涂不及空氣噴涂細致。 一般適用于單品種粘度較高的涂料和形狀簡單、表面積較大的工件批量生產。廣泛用于造船、集裝箱、鋼結構件、建筑內外墻、大型管道等行業。
關鍵詞：壓送式噴槍 壓縮空氣 空氣噴槍 氣動高壓噴涂 氣動柱塞泵
        頂針  空氣帽

 Air spray gun design
Abstract:   High pressure airless spray gun is a kind of to make use of the compredded air as power, not and directly use the compredded air carries on atomization to the coating, it presses pump to press the coating super - to the 10 Mpas Mpas-25ses with the super -, the high pressure coating passes nozzle of small spray gun hole the high speed spew out the atomization scatter into the most slender fog drop, at the same time atomization coating the corpuscle push into drive Tu Gong Jian's surface.
   Make use of top speed air current but make air gun partial uvauum, as a result generate the vacuum force absorbs to spray Ju to take into atomization jet from the pot the paint and mainly make big area spray gun, the advantage is that the atomization of paint is better, can hit the thickness and water request of painting the film.The press barrel is the cylinder shape press container, generally use stainless clad steel or straight carbon steel creation, the barrel covers setup to adjust to press accesserieses such as valve, pressures gauge and safety valves etc., and the conditioning inputs the press of compredded air to hit the press of outputting the coating.Press barrel have of still install agitator air, the capacity of the wirking pressure barrel is for the 10 Ls, 20 Ls, and 40 L...etc..Press barrel the structure is simple, the maintenance is convenient, the coating outputs press more stable, scarcity of section is cleaning change a color inconvenience.
   Air cap(air noozle), nozzle(coating nozzle) and vertex needle that compresses an air gun, habitually be termed three sets of compressing the air gun is decide air to spray Tu Zhuang mass key fraction.The gas moves a pair of septums pumps, is to make use of compredded air to make power, pass to change to make to get empty a barometric pressure action in the diaphragmatic seamy side toward the mrvhsnidm, while diaphragmatic outside side and pump body constitute a coating chamber that volume can change together.When the left side coating chamber volume became big to generate partial uvauum since the childhood, underneath an one-way valve opened, up an one-way valve locks, the coating in the coating barrel entered a left side coating chamber under the atmospheric pressure, but right surface coating chamber volume from greatly diminished, underneath an one-way valve lock, the coating generated press, the vertex opened over - an one-way valve discharged to pump a body.Two sides of double septum pump contain two coating chambers and be a volume from small become big, then another volume from greatly diminish, go round and begin again, go back and forth progress.So double the septum pump of every time back and forth have two coating suction and discharge and make the output efficiency of pump exaltation, and output contra more steady.Because the ratio of the input press of the compredded air and the output press of the coating is 1:1, the output press of the dimension convertibility coating of the input press of past conditioning compredded air
   High pressure airless spray gun can use higher - viscosity coating, big area spray gun speed reach to the 4 ms 2/ms min-7s 2/min, the production efficiency is high.Spray has no compredded air vs the coating interfusion, paint fog rebound to fly a loose phenomemon compare air spray gun Tu Shao, lowered coating dissipation, improved public nuisances. High pressure airless spray gun's lacquer measures a little bit greatly and paints fog thin degree not enough soft, Tu Ceng's thickness doesn't easily control.The Jing decorates a spray gun of Tu Mo to cannot compare with air spray gun meticulous. Generally compliant unipole species viscosity the higher coating is as simple as shape, the surface accumulate a bigger work piece quantity production.Extensively used for a shipbuilding and gather vanning, the steel structure crafts, such as piece, outside wall inside the building and large piping...etc..
Keywords:  Press a send type air gun  Compredded air  Compress an air gun  The gas moves high pressure airless spray gun  The gas moves plunger pump  Vertex needle  Compress a cap

 目錄
1  前言……………………………………………………（8）
2  噴槍簡介………………………………………………（9）
  2.1 噴槍的類型……………………………………………………（9）
3  霧化原理………………………………………………（9）
4  氣流霧化噴槍的通堵結構方案…………………… （9）
5  噴槍的主要零件………………………………………（12）
  5.1 現將噴頭的三個主要件特性介紹 ……………………………（13）
  5.2 噴涂輸漆可分為壓力桶、氣動雙隔膜泵……………………（14）
  5.3 噴槍結構技術改造………………………………………………（14）
6  按噴槍工作原理分三類………………………………（24）
  6.1 吸上式、重力式和壓送式三種吸上式噴槍………………………（24）
  6.2 噴槍操作及其要點…………………………………………………（25）
7  噴槍的維護與故障處理………………………………（26）
8  氣流霧化噴槍的設計與功能………………………（28）
  8.1 特點及應用……………………………………………………（28）
9  供料方式噴槍的霧化技術及其發展趨勢……………（29）
結論…………………………………………………………（31）
參考資料……………………………………………………（32）
致謝…………………………………………………………（32）