1. Roots blower shall not be installed in places where people often go in and out to prevent injury and scald.

2. Roots blowers shall not be installed in places where flammable, explosive and corrosive gases are easily generated to prevent fire disasters, poisoning and other accidents.

3. According to the direction of the air inlet and outlet and the maintenance needs, there should be adequate space around the foundation surface.

4. When installing the fan, check whether the foundation is firm, whether the surface is flat, and whether the foundation is higher than the ground.

5. When the fan is configured outdoors, a rain proof shed shall be set.

6. The fan can be used for a long time under the ambient temperature of no more than 40 ℃. When the temperature exceeds 40 ℃, exhaust fan and other cooling measures should be installed to improve the service life of the fan.

7. When conveying air medium, its dust content shall not exceed 100mg/m3 generally.

8. Precautions for operation and use of Roots blower

⑴ All parts of the fan shall be comprehensively inspected to see whether the parts are complete, the connection tightness of all bolts and nuts, the installation quality of all fasteners and locating pins, and the installation quality of air inlet and exhaust pipes and valves.

(2) In order to ensure the safe operation of the blower, it is not allowed to bear external loads such as pipes, valves and frames.

(3) Check the alignment quality of the blower and motor.

(4) Check whether all around the base of the unit are well padded and whether the anchor bolts are fastened.

(5) Fill the oil tank with mechanical oil of specified brand into the oil level line. The lubricating oil brand is R320 medium load working gear oil.

(6) Check whether the rotation direction of the motor meets the direction requirements.

(7) The belt cover (protective cover) shall be installed at the belt pulley (coupling) to ensure the safety of operation.

(8) Open all the inlet and outlet valves of the blower and turn the rotor of the blower, which should rotate flexibly without impact, friction and other phenomena. Only after confirming that everything is normal can the blower be started for trial operation.

9. No load test run of blower

⑴ The newly installed or overhauled fans shall undergo no-load test run.

⑵ The concept of no-load operation of Roots blower is to put it into operation when the inlet and outlet valves are fully opened.

(3) There is no abnormal smell or smoke, collision or friction sound, and the radial vibration speed of the bearing is not greater than 6.3mm/s.

⑷ Operate with no load for about 30 minutes. If it is normal, put it into operation with load. If it is found that the operation is abnormal, check and eliminate it, and then conduct a no-load test run.

10. The blower operates continuously under normal load.

(1) It is required to adjust gradually and slowly, with load up to rated load, and it is not allowed to adjust to rated load at one time.

(2) The so-called rated load refers to the static pressure difference between the inlet and exhaust ports, according to the rated pressure value on the nameplate. When the pressure at the air outlet is normal, pay attention to the pressure change at the air inlet to avoid overload.

(3) During the normal operation of Roots blower, it is strictly prohibited to completely close the inlet and outlet valves. Pay attention to the regular observation of the pressure, 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.

(4) Due to the characteristics of Roots blower, it is not allowed to directly return the gas from the exhaust port to the air inlet of the blower for a long time (changing the temperature of the air inlet), otherwise the safety of the machine will be affected. If it is necessary to adjust the return flow, cooling measures must be taken.

(5) Always pay attention to the oil quantity position of the lubricating oil, check it regularly, and make records to ensure the oil quantity.

11. Parking

Roots blower should not be stopped suddenly under full load. It must be stopped after unloading gradually to avoid damage to the machine. Users can formulate rules for emergency stop.

12. The safe operation and service life of the blower depend on correct and regular maintenance, and attention should be paid to any accident. In addition to general maintenance procedures, attention should be paid to the following points:

(1) Check the fastening of each part and whether the locating pin is loose.

(2) There is no oil leakage inside the blower body.

(3) There shall be no scaling, rust and peeling inside the blower body.

(4) Pay attention to whether the lubrication and heat dissipation are normal, pay attention to the quality of lubricating oil, often listen to the blower for noise, pay attention to whether the unit operates under the working conditions that do not meet the requirements, and pay attention to adding grease regularly.

(5) Overload of Roots blower is sometimes not displayed immediately, so pay attention to the increasing trend of inlet and outlet pressure, bearing temperature and motor current to judge whether the machine operates normally.

(6) Before disassembling the machine, measure and record the matching dimensions of the machine, and mark the parts to ensure that the original matching requirements are maintained after assembly.

(7) The oil tank of the new machine or overhauled blower shall be cleaned and put into operation according to the operation steps. It is recommended to replace all lubricating oil after 8 hours of operation.

(8) The maintenance and overhaul shall be carried out on schedule according to the specific use conditions, and a reasonable maintenance system shall be formulated and recorded. It is recommended to overhaul once a year, and replace the bearings and relevant vulnerable parts.

(9) The overhaul of Roots blower is recommended to be carried out by our company or professional maintenance personnel.

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