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微型真空泵在應(yīng)用中需要知道兩個參數(shù)是什么
2021-03-12 16:39
微型真空泵的參數(shù)中，常提到的有“真空度”、“抽氣速率”等等概念。
所謂真空，是指在給定的空間內(nèi)，壓力低于101325Pa的氣體狀態(tài)。在真空狀態(tài)下，氣體的稀薄程度通常用氣體的壓力值來表示，顯然，該壓力值越小則表示氣體越稀薄。
工業(yè)上有各種各樣的真空泵，對于各種泵的性能都有規(guī)定的測試方法來檢驗，主要參數(shù)有：
1、極限真空（通常稱為真空度）：將真空泵與檢測容器相連，放入待測的氣體后，進行長時間連續(xù)抽氣，當(dāng)容器內(nèi)的氣體壓力不再下降而維持某一定值時，此壓力稱為泵的極限真空。該值越小則表明越接近理論真空。
普通真空表測得的真空值（即：表壓）為相對真空度，用負(fù)數(shù)表示，是指被測氣體壓力與大氣壓的差值。
2、抽氣速率：在真空泵的吸氣口處，單位時間內(nèi)流過的氣體體積。
傳統(tǒng)工業(yè)用真空泵體積普遍很大，而且泵的工作需要特殊的真空泵油和潤滑機油，介質(zhì)氣體內(nèi)會含有大量油霧。
隨著儀器儀表工業(yè)的發(fā)展以及人們對環(huán)保的要求，各國的微型無油真空泵應(yīng)運而生，普遍有以下規(guī)律： 泵的價格和真空度指標(biāo)密切相關(guān)。
真空度指標(biāo)是各國生產(chǎn)商努力追求的主要指標(biāo)，它反應(yīng)了相應(yīng)的機械加工、密封技術(shù)、材料科學(xué)等優(yōu)先域的整體實力，也是生產(chǎn)商獲取利潤的重要手段。要提高真空度指標(biāo)，就必須有更高的密封條件，因此就需要采用尺寸更準(zhǔn)確、材料性能更優(yōu)異的零部件，于是生產(chǎn)成本就大幅度提高了。而且價格的增幅遠(yuǎn)遠(yuǎn)大于真空度指標(biāo)的增幅。當(dāng)然，抽氣速率的提高也會引起價格的攀升，但其增幅不大。因此，選擇微型真空泵時需要認(rèn)真考慮真空度指標(biāo)、抽氣速率指標(biāo)、自己的使用情況等，這樣才能較好地兼顧使用性能和成本 。
思科渦旋科技(杭州)有限公司從事高性能渦旋壓縮機與真空泵的研發(fā)、生產(chǎn)和銷售。公司擁有多項原創(chuàng)性發(fā)明專利，占據(jù)無油浮動渦旋技術(shù)創(chuàng)新及應(yīng)用較前沿地位。
公司是世界主要的渦卷技術(shù)的創(chuàng)新中心之一。2010年在中國上海設(shè)立國內(nèi)渦卷技術(shù)研發(fā)中心；在杭州設(shè)有博士后工作站分站，與國內(nèi)外高水平大學(xué)聯(lián)合進行人員培養(yǎng)和技術(shù)研發(fā)。公司近年的研發(fā)投入超千萬元，并保持研發(fā)投入的高增長，每年都能根據(jù)市場需要推出多項新產(chǎn)品。公司自主研發(fā)的浮動渦卷技術(shù)，解決了傳統(tǒng)固定擾動半徑渦旋技術(shù)長期存在的可靠性和穩(wěn)定性的問題，使產(chǎn)品的性能達(dá)到更高層次。我們的無油的機械設(shè)計使產(chǎn)品和解決方案更加潔凈、節(jié)能、環(huán)保。
更多微型真空泵或渦旋真空泵咨詢或者產(chǎn)品，可聯(lián)系思科渦旋！
Among the parameters of micro vacuum pump, the concepts of "vacuum degree", "pumping rate" and so on are often mentioned.
The so-called vacuum refers to the gas state with pressure lower than 101325pa in a given space. In vacuum, the rarefied degree of gas is usually expressed by the pressure value of gas. Obviously, the smaller the pressure value is, the thinner the gas is.
There are all kinds of vacuum pumps in industry. There are prescribed test methods to test the performance of all kinds of pumps. The main parameters are as follows:
1. Limit vacuum (usually called vacuum degree): connect the vacuum pump with the detection container, put in the gas to be measured, and continuously pump for a long time. When the gas pressure in the container no longer drops and maintains a certain value, this pressure is called the limit vacuum of the pump. The smaller the value is, the closer it is to the theoretical vacuum.
The vacuum value (i.e. gauge pressure) measured by ordinary vacuum meter is the relative vacuum degree, which is expressed by negative number and refers to the difference between the measured gas pressure and atmospheric pressure.
2. Pumping rate: the volume of gas flowing through the suction port of the vacuum pump in unit time.
The volume of traditional industrial vacuum pump is generally large, and the work of the pump needs special vacuum pump oil and lubricating oil, and the medium gas will contain a lot of oil mist.
With the development of instrument industry and people's requirements for environmental protection, micro oil-free vacuum pump emerges as the times require. There are generally the following rules: the price of the pump is closely related to the vacuum index.
Vacuum index is the main index pursued by manufacturers all over the world. It reflects the overall strength of the corresponding mechanical processing, sealing technology, material science and other fields. It is also an important means for manufacturers to obtain profits. In order to improve the vacuum index, we must have higher sealing conditions, so we need to use parts with more accurate size and better material performance, so the production cost is greatly increased. Moreover, the increase of price is far greater than that of vacuum index. Of course, the increase of pumping rate will also cause the price to rise, but the increase is not large. Therefore, when choosing the micro vacuum pump, we need to seriously consider the vacuum index, pumping rate index, their own use, so as to give better consideration to the performance and cost.
Cisco scroll technology (Hangzhou) Co., Ltd. is engaged in the R & D, production and sales of high-performance scroll compressors and vacuum pumps. The company has a number of original invention patents, occupying the forefront of oil-free floating vortex technology innovation and application.
The company is one of the world's leading scroll technology innovation centers. In 2010, a domestic scroll technology R & D center was set up in Shanghai, China; a postdoctoral workstation was set up in Hangzhou to conduct personnel training and technology R & D jointly with high-level universities at home and abroad. In recent years, the company's R & D investment exceeds 10 million yuan, and maintains a high growth in R & D investment. Every year, the company can launch a number of new products according to the market needs. The company's self-developed floating scroll technology solves the long-standing reliability and stability problems of traditional fixed disturbance radius scroll technology, and makes the product performance reach a higher level. Our oil-free mechanical design makes our products and solutions more clean, energy-saving and environment-friendly.
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