Regarding the installation of LF60B cooling tower fan reducer, the following are taboos and common mistakes that need to be avoided to ensure long-term stable operation of the equipment.
1. Installation core taboos
1. Hammering installation is strictly prohibited
When installing couplings, transmission parts or fastening bolts, it is absolutely prohibited to use tools such as hammers to directly hit them. Improper impact force will directly damage the bearings and gears inside the reducer, or cause the transmission shaft to deform, destroying the factory dynamic balance. Special tools should be used for assembly.
2. It is strictly prohibited to disassemble the counterweight block at will.
The counterweights attached to the output shaft, transmission shaft and impeller hub of the reducer are installed after rigorous dynamic balancing testing before leaving the factory. Random disassembly will destroy the dynamic balance of the entire transmission system, causing severe vibration during operation, causing equipment failure or even accidents.
3. It is strictly prohibited to use unqualified lubricating oil
Lubricants of specified brands must be selected, such as N110-N200 medium extreme pressure industrial gear oil (such as L-CKC 150/220). It is forbidden to use ordinary engine oil because it has insufficient anti-wear properties and cannot effectively protect gears and bearings. It will accelerate wear and shorten the life of the equipment.
2. Common installation errors
1. Inaccurate coaxiality calibration
This is one of the most common mistakes. The coaxiality between the output shaft of the reducer, the input shaft of the motor and the drive shaft of the fan must be accurately calibrated, and the error should be controlled within ≤0.1mm. Excessive coaxiality deviation will generate additional axial and radial forces, leading to premature wear of bearings and gears, and even shaft breakage.
2. Irregular use of foot pads
Excessive quantity: The number of gaskets should be as small as possible. The correct approach is to control it within 3 pieces and no more than 5 pieces at most. Too many shims will reduce the stiffness and stability of the foot support.
Dimensional mismatch: The spacer area should match the motor foot contact area. Gaskets that are too small will result in insufficient support strength and affect alignment accuracy.
Poor material and condition: Flat, burr-free gaskets should be used, stainless steel is recommended. It should be carefully inspected and cleaned before each installation.
3. Ignoring the preparation work before installation
The anti-rust oil is not cleaned: Before installation, the anti-rust oil on the motor input shaft, positioning boss and reducer connection parts must be wiped clean with gasoline or similar solvent to ensure the tightness of the connection and the flexibility of operation.
Insufficient foundation inspection: Failure to check whether the flatness, slope and central elevation of the foundation meet the design requirements (such as foundation plane height error <5mm) before installation will result in unstable equipment installation and vibration during operation.
4. Coupling installation error
Reverse pin installation: For diaphragm couplings, the pins (bolts) connecting the two coupling halves have a specific installation direction. Usually, the twisted hole must be installed with the pin head. If installed incorrectly, the twisted hole will lose its positioning function and affect the accuracy and life of the diaphragm.
Improper spacing: Failure to control the gap between the two half coupling flanges during installation (such as the left and right, up and down gaps <0.12mm), or the shaft spacing is too large/too small, will cause the diaphragm to be distorted and affect the transmission efficiency.
