What causes Roots blower overheating?

What's wrong with Roots blower overheating? Does this phenomenon also exist in your place?

The Roots blower is overheated, which is a headache for many netizens. Look at this netizen's problem. One Roots blower was installed and operated for an hour, and the pulley bearing was seriously heated. What's the matter?

The fan overheat of this netizen has two parts, the first is the belt pulley overheat, and the second is the serious overheat of the bearing. Through the interaction with this netizen, we can learn that this Roots fan belongs to the secondary maintenance fan, which should have been used for a certain number of years. After maintenance, the gear, bearing and belt have been replaced. For this type of overhauled fan, The causes of fan heating may be as follows:

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 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 (installation clearance) after assembly is too small. The axial expansion allowance of the bearing is not enough, and the bearing gland is pressed too tightly.

The more lubricating grease accounts for the volume of the bearing chamber, the better. The lubricating oil generally reaches the common normal line of the gear. What type of bearing is used? At the drive end, it is generally used for centering. From the use of balls, the roots blower may be installed too tightly at the drive end. If not, it 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 head motor is not in the same horizontal position

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

As for the overheating problem of Roots blower, Sanniu blower has also mentioned in the previous article. If you are interested, you can take a look at this article: the cause of overheating of Roots blower

Sometimes overheating of Roots blower is not a fault, sometimes it may be just a mistake of our operation. For example, the pipeline gate valve is not fully released, only a part of it is released, resulting in overpressure of the blower. Under specific working conditions, specific analysis is required. Some customers use Roots blower for the first time, and do not conduct scientific and reasonable operation, It also often leads to problems like this and that of Roots blower. Once a problem occurs, the blower tends to overheat. Therefore, overheating of Roots blower is a common phenomenon. Even a normal working Roots blower will release a lot of heat when running. Roots blower is a forced conveying equipment, Compressed air naturally generates a certain amount of heat.

If our Roots blower is overheated, how can we solve it? Sanniu Fan provides the following suggestions, hoping to help netizens:

1. First of all, we need to determine the cause of heat generation. After determining the cause of heat generation, we can take appropriate measures to solve the problem;

2. After finding the cause of the fault, if it is a problem that we can solve ourselves, then we can solve it ourselves. Some customers have technical departments, and many technical staff are skilled enough to repair the fault; It's OK to repair it yourself. Some customers are not good at technology, so they can choose the manufacturer to repair it.

3. In case of failure of new equipment, we recommend returning to the factory for maintenance, which can ensure the service life of the equipment. After returning to the factory, the equipment will be inspected and returned to the customer.

4. For old equipment, we recommend self repair or find a nearby manufacturer for repair. Secondly, for large roots blowers, we recommend self repair. The reason is that large roots blowers are expensive to repair and have their own skilled workers, which can save some money.