空壓機(jī)選擇的基本準(zhǔn)則有三條，可靠性、安全性與經(jīng)濟(jì)性。
一、機(jī)器的使用環(huán)境和條件。在場(chǎng)地?zé)o供水，場(chǎng)地狹小的情況下，選擇立式空壓機(jī);場(chǎng)地有長(zhǎng)距離的變動(dòng)(超過500米)，須考慮移動(dòng)式空壓機(jī);場(chǎng)地不能供電，則必須選擇風(fēng)冷式?？蛻魝兘?jīng)常錯(cuò)誤的認(rèn)為水冷式比較好，其實(shí)在國(guó)內(nèi)外小型空壓機(jī)中風(fēng)冷式占百分之九十以上。原因是風(fēng)冷式空壓機(jī)在設(shè)計(jì)上更加簡(jiǎn)潔，無需水源。水冷式空壓機(jī)必須具備完善的供水系統(tǒng)，投資大;水冷卻器壽命較短;運(yùn)行過程中大量浪費(fèi)水資源;北方冬季易凍壞氣缸。
二、所需壓縮空氣的質(zhì)量。一般的空壓機(jī)都含有一定的潤(rùn)滑油，且含有水分，在禁油禁水的場(chǎng)合不僅要注意空壓機(jī)的選型，在必要的時(shí)候還要增加附屬裝置。此時(shí)可選擇無油空壓機(jī)。無油空壓機(jī)基本不含油，但潤(rùn)滑不良，因此故障率高;此種空壓機(jī)因含有聚四氟乙烯，食品及制藥行業(yè)不能使用，無油空壓機(jī)只能做到不含油，但無法做到不含水。也泥桿 保定古箏 塑料增韌劑 拱形護(hù)坡模具 保定空調(diào)維修 托輥生產(chǎn)線可在空壓機(jī)后添加凈化裝置或干燥機(jī)，這種裝置能夠使空壓機(jī)不含油和水分，使含油水量在5ppm以下。
三、空壓機(jī)的排氣壓力及排氣量。常用的空壓機(jī)排氣壓力為0.7MPA，0.8MPA，目前社會(huì)上還有排氣壓力為0.5MPA的空壓機(jī)，輸氣距離過近。這種空壓機(jī)為一級(jí)壓縮，壓力比太大，易排氣溫度過高，造成氣缸積炭，導(dǎo)致事故的發(fā)生。大于0.8MPA的空壓機(jī)一般要特別制造，不可強(qiáng)行增壓?？諌簷C(jī)氣量的選擇要匹配所需的排氣量(并留有百分之十的余量)，空壓機(jī)最重要的參數(shù)之一就是排氣量。
There are three basic criteria for selecting an air compressor:
reliability, safety, and economy. 1、 The operating environment and
conditions of the machine. When there is no water supply on the site and
the site is small, choose a vertical air compressor; If there are
long-distance changes to the site (exceeding 500 meters), mobile air
compressors must be considered; If the site cannot be powered,
air-cooled must be selected. Customers often mistakenly believe that
water-cooled is better, but in fact, in domestic and foreign small air
compressors, air-cooled accounts for more than 90%. The reason is that
the air-cooled air compressor is more concise in design and does not
require water sources. The water-cooled air compressor must have a
complete water supply system and a large investment; The service life of
the water cooler is relatively short; Excessive waste of water
resources during operation; Cylinder damage is prone to freezing in
winter in the north. 2、 The quality of compressed air required. General
air compressors contain a certain amount of lubricating oil and
moisture. In situations where oil and water are prohibited, it is not
only necessary to pay attention to the selection of air compressors, but
also to add auxiliary devices when necessary. At this point, an
oil-free air compressor can be selected. Oil free air compressors are
basically oil-free, but their lubrication is poor, resulting in a high
failure rate; This type of air compressor cannot be used in the food and
pharmaceutical industry because it contains polytetrafluoroethylene.
Oil free air compressors can only be oil-free, but cannot be water free.
A purification device or dryer can also be added after the air
compressor, which can make the air compressor free of oil and water, and
keep the oil and water content below 5ppm. 3、 Exhaust pressure and
Engine displacement of air compressor. The commonly used air compressors
have exhaust pressures of 0.7MPA and 0.8MPA. Currently, there are also
air compressors with exhaust pressures of 0.5MPA in society, and the gas
transmission distance is too close. This type of air compressor is a
first stage compression, and if the pressure ratio is too high, the
exhaust temperature may be too high, causing carbon deposition in the
cylinder and leading to accidents. Air compressors larger than 0.8MPA
generally need to be specially manufactured and cannot be forcibly
pressurized. The air volume of the air compressor shall be selected to
match the required Engine displacement (with a margin of 10%). One of
the most important parameters of the air compressor is the Engine