Causes of Resonance Induced by Refrigeration Heating Circulator Mounting Components:
1. Insufficient foundation rigidity due to:
- Lightweight concrete foundation,
- Poor grouting,
- Inadequate foundation dimensions,
- Disconnection between fan base and foundation,
- Loose anchor bolts,
- Unstable machine base connection.
2. Low rigidity of fan base or volute.
3. Lack of support and flexible connections for inlet/outlet piping connected to the fan.
4. Adjacent equipment foundations positioned too close to the fan or exhibiting insufficient rigidity.
Remedial Measures:
1. Reinforce the foundation or re-grout, tighten nuts.
2. Enhance structural rigidity;
3. Install supports and flexible couplings;
4. Increase structural rigidity.
Causes of Vibration Due to Rotor Imbalance in Refrigeration and Heating Circulators:
1. Severe corrosion or wear of fan blades in the refrigeration/heating circulator's high/low-temperature unit;
2. Fan blades not rotating after assembly, causing shaft deflection due to the combined weight of the impeller and main shaft;
3. Uneven deposits on the impeller surface, such as rust, accumulated dust, or asphalt;
4. Impeller deformation during transportation, installation, or other causes, resulting in imbalance;
5. Balance weights detached from the impeller or imbalance remaining after maintenance.
Solutions:
1. Repair or replace;
2. Re-inspect and reassemble; if unused for extended periods, periodically rotate the shaft to prevent bending;
3. Remove deposits;
4. Repair the impeller and perform dynamic/static balancing tests;
5. Balance the refrigeration/heating circulator high-low temperature unit.
