What are the specific steps for handling the abnormal noise of WHX210-50-I worm gear reducer

To deal with the abnormal noise of WHX210-50-I, it is recommended to follow the closed-loop process of "safe shutdown → operation record → initial inspection of the whole machine → lubrication and installation → transmission and bearings → reinstallation and trial operation → status monitoring", and prioritize locking the three high-frequency causes of oil level/quality, alignment and bearings, and meshing backlash.
Overview of Operation Steps
Key parameters and judgment points

Lubrication: oil level up to the marked line; NAS cleanliness level ≥ 9, first filter or change oil online; The normal oil temperature is around 50-60 ℃. If there is an abnormal increase, priority should be given to checking the oil quality/quantity and bearings.

Alignment: coaxiality ≤ 0.05 mm; perpendicularity ≤ 0.03 mm/m; Tighten the installation bolts to the rated torque.

Mesh: Side clearance 0.05-0.20 mm; if it exceeds 0.30 mm or pitting/bonding exceeds the standard, it must be adjusted or replaced; Empty load abnormal noise is located according to its characteristics.

Bearing: Axial displacement ≤ 0.10 mm; priority replacement for high-frequency abnormalities or vibrations ≥ 0.15 mm/s during auscultation.

Practical points (easy to implement)

After the shutdown and tagging, record the "working conditions - noise characteristics - temperature/vibration", and prioritize the disposal of abnormal sound pressure ≥ 85 dB (A).

Lubrication priority: Add oil to the marked line first; Oil blackening/turbidity/NAS ≥ 9 level, filter or change the oil first; Shutdown inspection for oil temperature>80 ℃.

Align to standard: motor reducer load coaxiality ≤ 0.05 mm; box horizontal deviation<0.1 mm/m; Tighten the foundation and coupling bolts.

Transmission diagnosis: Disassemble and inspect the end cover by hand to determine the bearing; Measure the side clearance with a feeler gauge/dial gauge; If there is a periodic sharp sound or impact sound, immediately stop the machine for maintenance.

Bearing determination: If the axial displacement is greater than 0.10 mm, there is abnormal auscultation or vibration ≥ 0.15 mm/s, replace and pre tighten according to regulations.

Reinstall and test run: After changing the oil/cleaning, jog first, then empty for 15-30 minutes, with a temperature rise of ≤ 80 ℃ and no abnormal noise before loading.

Typical abnormal noise - causes - quick investigation for disposal

High frequency "hissing": too small side clearance or insufficient lubrication; Check the oil quality, measure the side clearance, and adjust it.

Periodic "clunking/impact": broken teeth, damaged bearings, or excessive side clearance; Confirm the turning and perform non-destructive testing/replacement of parts.

Continuous buzzing: overload or voltage imbalance; Measure current/voltage and reduce load or adjust drive.

Vibration accompanied by heat: bearing jamming or installation deviation; Calibrate installation and replace bearings.

Preventive maintenance (reducing recurrence)

Establish baseline and warning: vibration speed<4.5 mm/s, sound pressure<82 dB (A), oil temperature 40-50 ℃; Warning for abnormal changes ≥ 30%.

Standardized inspection: daily inspection for vibration/noise/temperature rise; Monthly oil quality/cleanliness inspection; Seasonal inspection of meshing clearance and bearing clearance.

Selection and operation: using synthetic worm gear special oil (PB ≥ 1200 N); Optimize the start stop curve and buffering to avoid frequent impacts.

If the above steps still cannot eliminate the abnormal noise, it is recommended to contact the manufacturer's technical support or professional maintenance unit for deep diagnosis and repair of spectrum/thermal imaging/oil ferrography.