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The key factors causing the high temperature of Roots blower are detailed as follows:

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

Roots blower It is a positive displacement fan, with impeller end face, fan front and rear end covers. The principle is a rotary compressor that uses two blade rotors to make relative movement in the cylinder to compress and transport gas. Widely used in aquaculture oxygenation, sewage treatment aeration, cement transportation, more suitable for low pressure occasions of gas transmission and pressurization system, can also be used as a vacuum pump.

Key factors leading to excessively high Roots blower

Roots blower operates continuously under normal load: ⑴ It is required to gradually and slowly adjust it to the rated load. It is not allowed to adjust it to the rated load at one time. ⑵ The so-called rated load refers to the static pressure difference between the inlet and exhaust ports, according to the calibrated pressure value on the nameplate. When the pressure at the exhaust port is normal, pay attention to the pressure change at the air inlet to avoid overload. ⑶ During the normal operation of roots blower, it is strictly prohibited to completely close the inlet and outlet valves. Pay attention to the pressure condition regularly, and check whether the safety valve acts to exhaust in case of overload. Otherwise, the safety valve should be adjusted in time, and overload operation is not allowed. ⑷ Due to the characteristics of Roots blower, it is not allowed to directly return the gas at the exhaust port to the air inlet of Roots blower for a long time (changing the temperature of the air inlet), otherwise the safety of the machine will be affected. If backflow regulation is required, cooling measures must be taken. ⑸ Always pay attention to the oil quantity position of lubricating oil, check regularly, and make records to ensure the oil quantity. Equipment maintenance of Roots blower can be carried out by automatically injecting lubricating oil. What causes the overload of Roots blower motor? ⑴ Compared with the specified pressure, the pressure difference is large, that is, the back pressure or inlet pressure is high; ⑵ Compared with the flow required by the equipment, the flow of the fan is too large, so the pressure increases; ⑶ The inlet filtration is blocked, and the outlet pipeline is blocked or blocked; ⑷ Collision and friction (seizure) of rotating parts; ⑸ Oil level is too high; (6) The narrow V-belt is overheated, the vibration is too large, and the pulley is too small. What are the solutions for overload of Roots blower motor? ⑴ Reduce the pressure to the specified value; ⑵ Put the excess gas into the atmosphere or reduce the blower speed; ⑶ Remove obstacles; ⑷ Stop the machine immediately and check the cause; ⑸ Adjust the oil level to the correct position; (6) Check the belt tension and replace it with a large diameter pulley.

1. Bearing problems

If there is a problem with the bearing during installation, the clearance of the bearing will be too small. If the bearing rotates down quickly, a lot of heat will be generated, which will lead to the bearing temperature being too high, even the temperature of the whole fan being too high. If the oil is added too much, the oil filling amount of rolling bearing is generally 1/3 to 1/2 of the bearing chamber volume, but not more than 2/3 at most. The bearing fits too tightly, and the bearing clearance (i.e. installation clearance) after assembly is too small. The axial expansion allowance of bearing is not enough

The gland is pressed too tightly.

The more grease accounts for the volume of the bearing chamber, the better. What type of bearing is used from the lubricating oil to the common normal line of the gear. If it is used at the drive end, it is used for centering of the general drive. From the use of balls, the installation pressure of the roots blower may be too tight at the drive end. If it is not, there is a problem with the bearing.

2. Gear installation clearance is too small

There are certain standards for the engagement of gears. The engagement area cannot be too large. If the engagement is too tight, the gears will rub against each other, causing excessive heat generation.

3. The machine head motor is not in the same horizontal position The machine head and the motor belt are not in the same horizontal position, resulting in certain mutual friction between the belt and the pulley, resulting in heat generation and belt pulley temperature rise.

I believe that after reading the above content, you should also know the key factors that lead to the excessive temperature of Roots blower. I hope it will be helpful to you.

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