Sealing form of Roots blower in Shandong Province
We use it Shandong roots blower Common seal up Including packing, expansion ring, expansion ring, labyrinth, mechanical seal up Which type of gas should be used mainly according to the nature of the gas (whether it is toxic, whether it is in contact with lubricating oil, flammable or flammable, pure and clean) seal up 。 along with Roots blower The continuous improvement and practical summary in practice are now labyrinth seal up And packing seal is widely used Shandong roots blower Let's briefly introduce two types seal up 。
2、 Seal diagram
1. Auxiliary oil tank 2. Shaft extension seal of driving shaft 3. Oil seal at rear of bearing seat
4. Wall plate shaft seal 5. Main oil tank 6. Wall panel 7. Casing
3、 Labyrinth seal
It is a non-contact dynamic seal which uses the fluid to flow through a channel composed of a series of throttling clearance and expansion cavity to make the working medium produce throttling effect to limit the leakage. Shandong roots blower Labyrinth seal is widely used in shaft seal of wallboard. Its sealing mechanism can be simply explained as that the fluid passes through a lot of
The zigzag passage has great resistance after throttling for many times, so that the fluid is difficult to leak, so as to achieve the purpose of sealing. It has the advantages of not limited by speed and temperature, simple structure, convenient maintenance and long service life. Properly increasing the number of sealing teeth can be used for sealing high-pressure gas; if the sealing parts are well processed and assembled, they will not break down in operation and do not need to be replaced frequently. The main disadvantage is that the machining precision of sealing parts is high. Due to the small seal clearance, friction and wear will occur when the machine runs poorly, thus reducing the sealing performance. This kind of seal is generally suitable for conveying air, and its use is limited when transporting toxic, flammable and explosive gases. Standard type Roots blower This type of sealing is generally used for wall panel sealing. Labyrinth seal is the most widely used and the simplest one, which can be used in Seal of Shandong roots blower 60% of the structure. It is mainly used in many industrial systems, such as increasing oxygen in aquaculture, aeration in sewage treatment, desulfurization and denitrification oxidation, pneumatic conveying, material transportation, casting, steel-making combustion supporting, etc.
4、 Packing seal
In the packing seal Shandong roots blower During the whole process, when the shaft and the packing have relative movement, due to the plasticity of the packing, it will produce radial force and contact the shaft closely. The lubricant impregnated in the filler produces an oil film between the contact surfaces, and a "boundary lubrication" state occurs at the contact position. A small oil groove with relatively thick oil film is formed in the non-contact concave part. The combination of contact position and non-contact position forms an irregular labyrinth, which can prevent fluid leakage.
The sealing packing has the corresponding elasticity, under the action of the pressure, it will produce the corresponding radial force and contact the shaft closely seal up Performance. It can be a dynamic device, which can make the packing, rotating parts and fixed parts produce pressure according to the pre tightening or self tightening effect of medium pressure.
2. The chemical stability of the filler is good, and the impregnating agent is not dissolved by the medium and has no corrosion effect. filler seal up Self lubricating performance is better. Wear resistance and low friction coefficient. If Roots blower If the eccentricity of the shaft is small, the filler should have enough floating elasticity to prevent friction and cause equipment failure. Packaging, sealing raw material production is simple and clear, filling convenient, simple.
In the transport of flammable and explosive gas to prevent leakage of special gas is now generally sealed with packing Shandong roots blower Main application industries: gas pressurization, natural gas transportation, sulfur dioxide transportation, methane gas transportation and other special industries.
The above is Shandong roots blower The most common form of 2 sealing, you should choose one suitable for yourself according to the requirements of your industry and system Roots blower If you don't understand, you can consult our customer service, and we will patiently answer for you. Due to the limited time, we can only introduce these two forms. In the future, we will introduce some other forms seal up Please pay attention to this website.
Sealing form of Roots blower in Shandong Province: http://theoxfordjazz.com/xw/103.html
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