发布时间：2022-05-17 13:16:51 人气：62 点赞：0
How many cooling methods do you produce roots blower?
Answer: the common cooling methods of Roots blower are as follows:
1. Air cooling
Roots blower generates heat through gas transmission and compression, which needs to be transferred from rotor to shell for heat dissipation. However, at low pressure, due to the poor heat conduction and convection performance of the gas, the heat absorbed by the rotor is difficult to dissipate, and the temperature of the rotor is always higher than that of the shell.
The thermal expansion of the rotor will reduce the clearance between the rotor and the rotor and between the rotor and the pump shell. Especially when the differential pressure is high, it may become particularly serious, resulting in rotor adhesion and pump damage. In order to make roots pump work under high differential pressure, expand the scope of use and improve the reliability of the pump, it is necessary to try to discharge the heat generated by the rotor, that is, cool the rotor.
In order to understand the essence of air cooling, let's take a look at the gas flow on the exhaust side of Roots blower. In Roots blower, the compressed process of inhaled gas is discontinuous and sudden. The inhaled gas is enclosed in the chamber with the rotation of the rotor. In addition, with the rotation of the rotor, the gas in the chamber is suddenly connected with the exhaust port.
2. Rotor internal cooling
In order to make roots blower work under higher pressure difference, circulating oil can be used to cool the rotor, oil holes and oil diameter shaft heads can be installed at both ends of the pump shaft for driving, and the cooling method can be discharged from the other end through the inner wall of the rotor. In addition to cooling the rotor, the cooling oil also lubricates the gears and bearings. The cooling effect is good. When the pump is running, the rotor temperature is lower than the shell temperature. This method is mostly used for large pumps.
3. Rotor oil film cooling
The cooling method is to connect the pipeline at the inlet of Roots blower and absorb the heat of rotor with evenly dripping cooling oil. The oil is delivered to the inlet of the pump through the filter and cooler, through the closed oil pump and through the pipeline. After dropping oil to the rotor, it flattens on the rotor surface with the rotation of the rotor.
It can not only absorb the heat of the rotor, but also form an oil film on the surfaces of the two rotors to prevent gas backflow and take away the fine dust attached to the rotor surface. An oil tank is set at the pump outlet to collect waste oil, filter and recycle it after cooling.
4. Water cooling
Roots blower refers to compressing the air sucked in by the intermediate stage or secondary pump and conveying it with a combined silencer with phase difference from the comprehensive absorption. By injecting a small amount of water into the pump, the heat generated by compressed air can be removed. The suction pipe is installed at the air inlet end of the single-stage or two-stage pump unit and connected with the air inlet of the fan. Water is sucked by the fan under vacuum. The greater the vacuum, the higher the amount of water sucked. The simple regulating valve should ensure a good suction volume, and the suction water temperature should be maintained at about 20 degrees
Most roots fans produced by Ruizhe environmental protection adopt air-cooled mode, and submerged fans and water-cooled fans adopt water-cooled mode! At the same time, our roots pump is the same!