How should we handle an overload operation failure in a three-lobe Roots blower?
Release date:
2021-08-02
How should an overload operation fault in a three-lobe Roots blower be handled? 1. The load must be adjusted gradually and slowly until it reaches the rated load; it is not permitted to adjust the load directly to the rated level in one step. In other words, this is controlled by installing a bypass pipe and valve.
How should we handle an overload operation failure in a three-lobe Roots blower?
1. The load should be gradually and slowly adjusted until it reaches the rated load; it is not permitted to adjust the load directly to the rated level in one step. In other words, this is achieved by installing a bypass pipe and valve for control purposes.
2. During normal operation of the three-lobe Roots blower, it is strictly prohibited to completely close the inlet and outlet valves, and overloading is not permitted.
3. Due to the characteristics of the three-lobe Roots blower, it is not permitted to directly return exhaust gases to the inlet of the three-lobe Roots blower for an extended period (i.e., to alter the temperature at the inlet). Otherwise, the stability of the machine may be affected. If backflow regulation is necessary, cooling measures should be implemented.
4. Under rated operating conditions, the surface temperature of each rolling bearing in the three-lobe Roots blower generally does not exceed 95°C, the lubricating oil temperature inside the oil tank does not exceed 65°C, and the vibration velocity of the bearing components does not exceed 6.3 mm/s.
5. Pay close attention to oil splashing and the oil level position at all times.
6. The three-lobe Roots blower should not be stopped suddenly when fully loaded; instead, it should be stopped gradually after the load has been reduced step by step to avoid damaging the machine.
Five precautions for installing a three-lobe Roots blower:
1. The installation personnel should understand the equipment’s structure and be familiar with the specifications, structure, impeller rotation direction, and air flow inlet and outlet directions of the three-lobe Roots blower.
2. The ventilation ducts connecting the inlet and outlet of the three-lobe Roots blower must have independent support points and shall not overlap with the ducts on the blower components. When installing the three-lobe Roots blower, please pay attention to the horizontal alignment of the fan.
3. Ensure that the wiring is correct and reliable, especially that the wiring sequence at the electrical cabinet matches the sequence on the fan terminals.
4. After installation is complete, manually rotate the impeller to check for any friction. Only proceed with a trial run once everything appears normal.
5. After installation is complete, remember to check inside the chassis for any leftover special tools or debris.
Precautions for the operation of three-lobe Roots blowers:
1. After the installation of a three-lobe Roots blower, some unusual noises may be heard inside the blower. These noises will gradually diminish after the blower has been running for a while—this is a normal phenomenon. Additionally, some new blowers may exhibit unstable current. This is also normal and is caused by the viscosity of the lubricating oil.
2. The damper for adjusting the airflow is ineffective.
3. The fan of the three-lobe Roots blower must not be operated under overpressure. Operating under excessive pressure can easily cause the motor to burn out. It is essential to check the fan’s pressure daily on the three-lobe Roots blower.
4. Pressure gauges are usually closed; therefore, they should only be opened for measurement when checking the pressure. Do not leave the pressure gauge open for extended periods.
5. Regarding noise issues, San Ye Roots. Fan Noise has always been a concern for everyone. The noise level varies from one fan to another. Even fans of the same model may differ in noise levels as long as they don't exhibit any abnormal noises. 6. Generally speaking, when the pressure exceeds 58.8 kPa, three-lobe Roots blowers require water cooling; however, air cooling is not ruled out. If water cooling is used, the temperature of the cooling water should not exceed 25 degrees Celsius.
7. Water-cooled three-lobe Roots blowers JGR80–JGR125 consume 5–8 L/min of water; JGR150–JGR300 consume 8–13 L/min of water.
8. Regarding the water-cooled three-lobe Roots blower, when starting up, first start the water-cooling pipes; when shutting down the three-lobe Roots blower, close the end cooling water.
9. If the three-lobe Roots blower is not used for an extended period, the water-cooled three-lobe Roots blower should have the water drained from its water pipes, while the air-cooled three-lobe Roots blower should have its internal components cleaned and protected.
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