The replacement of the cycloidal wheel of the BLY reducer requires a step-by-step operation of 'Disassembly→Cleaning and Inspection→Assembly→Debugging', focusing on ensuring that the cycloidal wheel phase matches, the bearings and seals are intact, and avoiding installation deviations leading to operational failures.
1. Preparation before replacement
Cut off the power and lock the power of the reducer to prevent accidental start and ensure safe operation.
Prepare an adapted new cycloidal wheel (which must be consistent with the original model, including the number of teeth and eccentricity), special tools (wrenches, pullers, copper rods) and auxiliary materials (grease, sealant).
Clean the work site and lay protective mats to prevent parts from being contaminated with impurities or damaged by collisions.
2. Disassembly process
Remove the couplings, flanges or connecting bolts at the input and output ends of the reducer, and separate the reducer from the motor and load equipment.
Open the upper cover of the reducer, drain out the internal lubricating oil, and take out the flat key, retaining ring and other accessories at the output shaft end.
Use a puller or special tool to disassemble the output shaft bearing, and take out the output shaft, eccentric sleeve, and needle bearing in sequence.
Remove the old cycloidal wheel (the phases installed in pairs need to be marked, usually there are '1''2' or arrow marks on the cycloidal wheel), and at the same time take out the pin tooth pin, pin tooth sleeve and other related parts.
3. Cleaning and Inspection
Thoroughly clean the machine base, output shaft, eccentric sleeve, pin tooth housing and other components to remove oil stains, iron filings and wear dust.
Check whether the pin tooth pins and pin tooth sleeves are worn and deformed, whether the bearings are stuck or have abnormal noise, whether the seals are aged and damaged, and damaged parts need to be replaced simultaneously.
Check the size, tooth shape and phase mark of the new cycloidal wheel to ensure that it completely matches the old one and that there are no bumps or burrs on the surface.
4. Assembly steps
First install the pin tooth pin and pin tooth sleeve into the pin tooth shell to ensure that they are installed in place and can rotate flexibly.
Install the new cycloidal wheel according to the original markings. The paired cycloid wheels must be in correct phase (the markings are aligned or misaligned according to the manufacturer's regulations), and insert the eccentric sleeve and needle roller bearing.
Install the output shaft, and assemble the bearings, retaining rings, and flat keys in order to ensure that the shaft system rotates smoothly and without jamming.
Apply appropriate grease (or inject lubricating oil). The amount of oil must comply with the specified scale of the reducer to avoid too much or too little.
Seal the upper cover, tighten the fixing bolts evenly, and apply sealant to prevent leakage.
