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Cause Analysis of Pressure Variation of Roots Blower and Pressure Variation of Roots Blower

Source: Roots blower manufacturer Published on: 2023-02-16 Hits:

Roots Blower It is a positive displacement fan, and the air volume delivered is proportional to the number of revolutions. Two impellers suck and exhaust three times every time the three blade impeller rotates. Compared with the two blade type, the gas pulsation is small, the vibration is small, and the noise is low. There is always a small gap between the impeller on the two shafts of the fan and the hole surface in the elliptical housing, between the impeller end face and the front and rear end covers of the fan, as well as between the fan impellers. Driven by the synchronous gear, the air is transported from the air inlet of the fan to the exhaust side along the inner wall of the housing. The fan cavity does not need lubricating oil, has simple structure, smooth operation, stable performance, and is suitable for many purposes, and has been used in a wide range of fields.

High efficiency and energy saving, high precision, low noise, long life, compact structure, small size, light weight, easy to use, and widely used in petrochemical, building materials, electricity, smelting, fertilizer, mines, ports, light textile, food, paper making, aquaculture and sewage treatment, environmental protection industry and many other fields, most of which are used to transport air, can also be used to transport gas Hydrogen, acetylene, carbon dioxide and other flammable, explosive and corrosive gases.

The common solution to low pressure of roots blower is to replace a larger motor, but the flow may decrease, so the speed generally needs to be increased.

The pressure of roots blower is not the pressure that roots blower can produce, but the pressure that roots blower can load. The low pressure of roots blower is actually the insufficient pressure and force under the normal operation of the blower. If forced use, the motor will be damaged. Therefore, if you want to increase the pressure, you must replace the powerful and high-power motor.

The head of Roots blower is universal, so just replace the motor.

However, there will be some problems here, that is, the flow. The diameter and model remain unchanged, and the speed is fixed. With the increase of pressure, the flow will become smaller. If you want to increase the flow, you need to increase the rotating speed. Increasing the rotating speed will speed up the wear of the fan, which is easier to break.

Cause of pressure change of roller blower

Therefore, at the beginning of fan selection, it is necessary to select a suitable model. Of course, if the use environment of Roots blower is changed later, it is a good method to replace the motor, but pay attention to the air volume. Another situation is that the normal pressure cannot be reached during normal use, which may be caused by air leakage of the pipeline and the falling off of the aerator head, and the pipeline shall be repaired in time.

After using Roots blower for several years, the common fault problem is that the noise is increasing, the pressure is decreasing, and the air volume is small. This is the fault problem of Roots blower manufacturer, especially for the Roots blower in the later use. What are the main reasons for these failures?

1. Reasons for increased noise

Roots blower has been used for about 10 years, but its overall compactness has declined, the bolts are loose, the silencer is aging, and the gap error between various parts has increased, resulting in the noise of Roots blower becoming more and more loud.

2. Pressure reduction

The main reason for the pressure reduction of Roots blower is that the clearance between impellers, between impellers and wallboards, and between impellers and casings increases as the clearance increases. Roots blower is a mandatory gas conveying equipment, and the pressure presented by Roots blower is the front resistance, which is often referred to as back pressure. The increase of clearance will lead to serious gas backflow (increased internal leakage); Cause the negative pressure to decrease, resulting in the appearance of pressure reduction.

Other reasons for pressure reduction: the sealing is reduced. If there is gas leakage in Roots blower or pipeline, it will affect the pressure value of Roots blower. Serious leakage will cause the pressure to fall below the rated standard.

3. Air volume is too small

The air volume is too small and the gap of Roots blower is also large. The air volume will decrease if the gap increases and the internal leakage is serious. Similarly, in the process of conveying gas, if the pipeline leaks, the air volume will also decrease. The low air volume may also be caused by pipe blockage, which is usually accompanied by high pressure and temperature. In order to prevent pipe blockage, it is necessary to regularly check the Roots blower.

I believe that after reading the above, you should also understand the reasons for the pressure changes of Roots blower. I hope it will help you.

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