FAQS

1, Changes the pipe resistance curve, increases the resistance, changes the fan operating point

2, Poor manufacturing quality fan or fan of serious wear

3, The fan speed is reduced

4, Fans are working in the unstable

Remedy:

1, Adjusting the resistance curve of pipe, reducing resistance to change fan operating point

2, Overhaul fan

3, Increase fan speed

4, Adjusting fan work-space

1, Pressure gauge malfunction, failure or stuck valves, flow and pressure that can not be adjusted as needed

2, Due to the need for low flow, pipes get clogged and traffic drastically reduced or stopped, the fan unstable region (flying zone) work and reverse flow turbine rotor to counter the phenomenon.

Remedy:

1, To repair or replace the pressure gauge for valve reparation

2, If the Department of the need to reduce the flow, you should open the bypass valve, or reduce speed, such as line pipe plug should be cleaned.

1, Changed the gas composition, high gas temperature or reduced solid impurities contained in the gas to reduce the density of the gas

2, The intake pipe ruptured or poor sealing of pipe

Remedy:

1, Measuring the gas density and eliminating the cause of density’s decrease

2, Weld cracks or replace pipe flange gasket

Cause of failure:1, Changed the gas composition, low gas temperature or increased solid impurities contained in the gas to increase the density of the gas

2, Outlet pipes and valves are clogged by soil, soot and debris and intake pipes, valves or grille are clogged by dust, soot and debris.

3, The outlet pipe ruptured or poor sealing of pipe

4, Big damage of the sealing and the worn impeller blades

Remedy:

1. Measuring the gas density and eliminating the cause of density’s increase

2, To open a large outlet valves, or cleaning.

3, To open a large intake valves, or cleaning.

4, Welding cracks or replace pipe flange gasket

1 . Bearing box rattling

① different heart fan shaft and motor shaft couplings installed crooked
② cabinet or friction with the impeller inlet
③ foundation is not solid steel degree
④ impeller or impeller loose rivet deformation
⑤ impeller shaft drive shaft loose, loose bolts or coupling
⑥ chassis with brackets, bearing box and bracket, bearing cover on the seat , such as loose coupling bolts
⑦ fan out of gas pipeline installation bad
⑧ rotor imbalance , fan blades wear

2. bearing temperature is too high

① bearing box rattling
② quality grease is not lit , deterioration, contain too much dust, sticky sand , dirt and other impurities
③ bearing cover, seat bolts clamping force is too large or too small
④ shaft with rolling bearing installation skew , after bearing two different heart
⑤ bearing damage

3. electrode current or temperature is too high

① when driving or throttle intake pipe gate is not closed tight
② traffic exceeds the specified value
③ fan conveying gas density is too large or sticky substances
④ motor input voltage is too low or single-phase power supply
⑤ coupling connection errors, aprons too tight or uneven gaps
⑥ affected by the impact of severe shock bearing box

90% products of LEESII blower are designed according to customers’ performance requirements, each customer of LEESII blower will use the most suitable product .
But before purchasing, you should be attention to the following items that you must be aware.

Please try to provide us the following data, which maybe affect the design accuracy.
*Pressure: what is the required pressure?
*Air capacity: what is the required air capacity on the basis of enough pressure?
*Medium temperature: what is the temperature of the gas that passes through the blower? And what is the maximum temperature?
If you cannot provide the accurate temperature, please tell us the range of the temperature, which will help us for designing the blower.
*Altitude: the air density and atmospheric pressure will change while the altitude changes, which will make the blower performance different. One blower will output different at low altitude and high altitude. So ,please try to provide us the altitude of site where the blowers will be used .Usually ,the technicians from the project owner and the design company can provide this data .If not ,please give us a approximate altitude, which will help us for designing the blower.
*Voltage & frequency: what is the voltage and frequency of the site where the blowers will be used?
*If the blower is an ordinary one, please provide the rotation direction and outlet angle.The following information will help us to learn more about the fan operation conditions, which maybe affect the fan’s reliability, lifetime and safety.
*What is the maximum and minimum temperature of the environment where the fan locates?
1.Is there dust in the fan transported gas? what is the dust loading?
2.Is there corrosive gas in the fan transported gas? If possible, please provide gas composition.
3.Is there inflammable and explosive gas or dust in the conveyed gas of the fan or the environment where the fans locates?