_ in the rotary vane vacuum pump used in high speed paper machine

today, small make up to you to understand rotary vane vacuum pump application in high speed paper machine. Vacuum pressing machine is mainly used for medium and high speed paper machine, the equipment is used rotary vane vacuum pump. Vacuum press roller is stone roller and press roller is vacuum press roller. Vacuum roller roller roller structure and the structure of the basic same, vacuum roller roller made of bronze or stainless steel casting, roll the thickness of the shell is determined by the stiffness and strength. The rest of the paper machine working parameters, such as vehicle speed and vacuum degree, is constant, the thicker the roll shell, the smaller the dehydration ability. In the process of high speed paper, after the felt and wet paper is sucked out, it will be through the hole in the cylinder, it is almost impossible to reach a vacuum chamber and then by vacuum adsorption area, and then through the rollers of the centrifugal force will be put into the white water tray. The function of the vacuum chamber is used only for the air suction casing perforation. The thicker the roller shell, the greater the amount of air. Therefore, the use of rotary vane vacuum pump is helpful to improve the dewatering efficiency of press.

there are rubber vacuum pressure roller of roller. Why do you want to do that?

vacuum roller shell covered with rubber thickness for 30 to 40 mm. The advantages of encapsulation is evenly distributed pressure, reduce the wear and tear felt, and increase the pressure on the press line. Production practice shows that the vacuum press roller axial and circumferential center distance of the hole on the smaller, more eye, can significantly improve the dehydration effect of vacuum pressure roller, so as to effectively eliminate the phenomenon of embossing and prolong the service life of felt. Should choose appropriate vacuum roll diameter, to ensure that the roller has sufficient amounts of dehydration, and open will affect the strength of the roller and left a 'shadow' on the paper. Vacuum press roll eyes usually is about 4 mm diameter.

import vacuum press dehydration mechanism of rotary vane vacuum water pump is what?

1。 Predewatering

wet sheet first enter the dehydration zone composed of vacuum suction chamber. In under the action of the rotary vane vacuum pump suction, air vertical through the wet paper, felt into the vacuum chamber, some water being taken away.

2。 Mixed dehydration

wet sheet into the mixture of dehydration, the dehydration zone by the vacuum suction and pressure from OuDeZheng predewatering area. In a vacuum adsorption and roller pressure, under the joint action of wet paper, paper moisture in the vertical pass and rubber cloth into the vacuum chamber and is expelled.

3。 Moistureproof

after the wet paper by positive pressure area, as a result of the pressure gradually, gradually open the wool stoma felt and wet sheet, on the contrary, not out of the water is sucked back.

vacuum dehydration is suitable for the small grain size, precipitation, certain general particle size, the thickness of the filter material up to 3 mm, continuous suction filter filtration and vacuum drying machine.

this article mainly introduced the guangdong rotary vane vacuum pump application in high speed paper machine. Vacuum water pump with functions of high speed paper machine vacuum pressing. Its main characteristic is the roller for stone roller, roller under vacuum for rubber roller. Dehydration with high efficiency, the paper dry evenly, less damage, in the process of suppression has clean effect to the felt, can prolong the service life of felt.

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