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Introduction: When it comes to vacuum dryers, everyone may be a little unfamiliar, but everyone in the instant noodles will be familiar with it. Dehydrated vegetables are dehydrated through a vacuum dryer. The vacuum dryer is a device for removing water from the interior of the container after the predetermined degree of vacuum is removed from the interior of the packaging container. It is designed to dry heat-sensitive, easily decomposed and easily oxidized materials, and can be filled with an inert gas, especially some components. Complex items can also be quickly dried. For the vacuum dryer, vacuum debugging is an important test link. The following Xiaobian will tell you about the process.
First, close the door and tighten the door handle in place, close the air release valve, and open the vacuum valve (manual valve must be used during commissioning).
Then confirm that the vacuum connection pipe, vacuum drying box exhaust pipe and vacuum pump are firmly connected. Turn on the vacuum pump power and start pumping. When the indicated value of the vacuum gauge reaches -0.1Mpa, close the vacuum valve and then turn off the vacuum pump power to prevent the working fluid of the vacuum pump from flowing back to the working chamber. At this time, the inside of the box is in a relative vacuum state (in vacuum drying. When the tank is empty and unheated, the longer the vacuum is maintained, the better the seal of the tank and the pipeline, the better the equipment performance. Under normal circumstances, the vacuum is zero for at least ten hours.)
The above is the commissioning process for the vacuum drying machine. If you want to know more about the product, go and consult the specific manufacturers!
The Tapered Roller Bearing belongs to the separation type bearing, and the inner and outer rings of the bearing have a conical raceway. This type of bearing is divided into single, double and four row Tapered Roller bearing according to the number of the roller. The single row tapered Roller Bearing can bear the radial load and the single direction axial load. When a bearing is subjected to a radial load, an axial force will be produced, so another bearing that can withstand the axial force of the opposite direction is needed to balance it.
There is a single row tapered roller bearing outer ring, the inner ring and a conical roller by maintaining a basket frame into the inner module. The outer ring can be separated from the inner ring assembly. According to the standard of the ISO tapered roller bearing dimension, any standard type tapered roller bearing outer ring or inner ring assembly should be able to achieve international interchangeability with the same type of outer ring or inner ring assembly. For example, the outer ring of the same type should conform to the ISO492 (GB307) rule besides the external dimension and tolerance. The conical angle of the inner ring assembly and the diameter of the component cone must also comply with the relevant provisions of the interchangeability.
Usually, the conical angle of the outer raceway of the single row tapered roller bearing is between 10 degrees ~19 degrees, and it can simultaneously bear the joint action of axial load and radial load. The larger the cone angle, the greater the ability to bear the axial load. The bearing of the big cone angle, the postposition code plus the B, the cone angle between 25 degrees ~29 degrees, can bear a large axial load. In addition, the single row tapered roller bearing can adjust the size of the clearance during the installation process.
The outer ring (or inner ring) of a double row tapered roller bearing is a whole. The two inner ring (or outer ring) has similar small end faces, and the middle has a spacer. The clearance is adjusted by the thickness of the spacer, and the pre interference of double row tapered roller bearings can also be adjusted by the thickness of the spacer.
The performance of the four row tapered roller bearing is basically the same as that of the double row tapered roller bearing, but the radial load of the double row tapered roller bearing is greater than that of the double row tapered roller bearing, and the limit speed is slightly lower, which is mainly used for heavy machinery.
Multi seal double, four row tapered roller bearings, ZWZ provides long life, multi seal double, four row tapered roller bearings. The new design of the bearing is personalized and the traditional design method of the fully sealed bearing is changed. A new seal structure combined with seal and dust-proof is adopted to improve the sealing effect and improve the sealing performance. Compared with open structure bearings, the life of multi seal double and four row tapered roller bearings increased by 20% to 40%, and the consumption of lubricants was reduced by 80%.
Tapered roller bearings are widely used in automobile, rolling mill, mine, metallurgy, plastic machinery and other industries.
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LUOYANG AUTO BEARING CO.,LTD , https://www.lyautobearing.com