Installation and Commissioning: Prerequisites for Normal Operation
As precision mechanical equipment, correct installation and commissioning of rice hullers are prerequisites for ensuring normal operation and optimal performance. Many equipment failures and substandard performance are not due to the equipment itself but improper installation and commissioning. This article details the complete process from delivery to commissioning and acceptance, helping users smoothly put equipment into operation.
Pre-Installation Preparation
1. Site Preparation
Space Requirements:
- Reserve no less than 0.8 meters of operation and maintenance space around equipment
- Reserve installation space above for elevators and air ducts (height ≥ 5.5m)
- Consider feed and discharge directions to avoid cross-interference
Foundation Requirements:
- Concrete foundation strength ≥ C20, thickness ≥ 150mm
- Foundation flatness error ≤ 3mm/m
- Pre-embedded foundation bolts or reserved installation holes
- Foundation load-bearing ≥ 3 times equipment weight
Environmental Requirements:
- Power supply: Three-phase 380V ± 10%, frequency 50Hz
- Pneumatic type needs compressed air source (0.6-0.8 MPa)
- Good ventilation for dust dispersion
2. Unboxing Acceptance
Check Packaging:
- Whether outer packaging is intact, any damage or deformation
- Verify shipping list, confirm all accessories present
- Check for transport damage
Inventory Accessories:
- Main machine
- Control cabinet and cables
- Matching fan (if applicable)
- Manual, certificate, warranty card
- Special tools and spare parts
Record Issues:
- Photograph any damage or shortages
- Contact manufacturer promptly for handling
Installation Steps
Step 1: Equipment Positioning
Transport to Position
- Use forklift or crane to move equipment to installation position
- Protect equipment surface, avoid collisions
- Large equipment requires multiple people, unified command
Preliminary Leveling
- Use shims or adjustment bolts for rough leveling
- Longitudinal and transverse levelness error ≤ 5mm/m
Step 2: Securing Equipment
Install Foundation Bolts
- Bolt embedment depth ≥ 20 times bolt diameter
- Bolt protrusion height appropriate (about 50-80mm)
- Secondary grouting method provides more secure fixing
Tighten Nuts
- Tighten symmetrically to avoid equipment deformation
- Tightening torque meets requirements
- Leave 1-2 thread pitches adjustment margin
Step 3: Connect Pipes and Lines
Feed Pipe Connection:
- Connect feed hopper with upstream equipment
- Ensure sealing to avoid material leakage
- Install inspection openings for cleaning
Discharge Pipe Connection:
- Connect brown rice outlet and husk outlet
- Air separation system duct connections airtight
- Duct routing short and straight, minimize elbows
Electrical Connection:
- Connect main power according to electrical drawings
- Grounding connection reliable (ground resistance ≤ 4Ω)
- Control lines connected correctly
Air Line Connection (pneumatic type):
- Connect air compressor piping
- Install filters and pressure reducing valves
- Check airtightness
Step 4: Lubrication and Inspection
Add Lubricating Oil:
- Gearbox filled with specified grade lubricating oil
- Bearing housings filled with appropriate grease
- Check if all lubrication points are clear
Manual Rotation:
- Cut power, manually rotate transmission components
- Check for sticking, abnormal sounds
- Confirm smooth operation
Commissioning Steps
Step 1: No-Load Test Run
Electrical Inspection:
- Check if power supply voltage is normal
- Check functions of all switches and buttons
- Confirm emergency stop button is effective
Jog Test:
- Brief startup, observe if motor rotation direction is correct
- Listen for abnormal sounds
- Check if current is normal
Continuous No-Load Operation:
- No-load operation for over 30 minutes
- Check bearing temperature rise (< 40°C)
- Check motor temperature rise (< 60°C)
- Check vibration condition
Step 2: Load Test Run
Small Quantity Test:
- Prepare 10-20kg paddy
- Slowly feed, observe hulling effect
- Check operation of all parts
Parameter Adjustment:
- Adjust roll gap to recommended value
- Adjust peripheral speed difference (if adjustable)
- Adjust airflow to appropriate range
- Adjust feed flow
Effect Detection:
- Sample and test hulling rate
- Observe broken rice condition
- Check husk separation effect
Step 3: Continuous Operation Test
Continuous Operation 2-4 Hours:
- Observe equipment stability
- Monitor current and temperature changes
- Check for abnormal vibration or noise
Performance Indicator Detection:
- Hulling rate detection (hourly sampling)
- Broken rice rate detection
- Grain content in husk detection
- Capacity measurement
Acceptance Standards
Installation Quality Acceptance
| Acceptance Item | Qualified Standard | Detection Method | |-----------------|-------------------|------------------| | Equipment Levelness | ≤ 1mm/m | Spirit level measurement | | Foundation Bolt Tightening | No looseness | Wrench inspection | | Electrical Grounding | Resistance ≤ 4Ω | Ground resistance tester | | Duct Connection | No air leakage | Hand feel or smoke test | | Protective Devices | Complete and intact | Visual inspection |
Performance Indicator Acceptance
| Acceptance Item | Qualified Standard | Detection Method | |-----------------|-------------------|------------------| | Hulling Rate | ≥ 85% | Sampling detection | | Broken Rice Rate | ≤ 3% | Sampling screening | | Grain in Husk | ≤ 0.5% | Sampling sorting | | Operating Noise | ≤ 85 dB | Sound level meter | | Bearing Temperature Rise | ≤ 40°C | Thermometer | | Motor Current | Within rated range | Ammeter |
Continuous Operation Acceptance
- Continuous normal operation for over 8 hours
- No abnormal shutdowns
- All performance indicators stable
Common Problems and Solutions
| Problem | Possible Cause | Solution | |---------|---------------|----------| | Excessive Vibration | Unstable foundation, poor alignment | Strengthen foundation, re-align | | Excessive Noise | Bearing lack of oil, large gear gap | Replenish lubrication, adjust gap | | Low Hulling Rate | Excessive gap, wrong speed ratio | Reduce gap, check speed ratio | | Excessive Broken Rice | Small gap, low moisture | Increase gap, condition treatment | | High Current | Heavy load, mechanical sticking | Reduce feed, check mechanics |
Acceptance Documentation
After completion of acceptance, the following documents should be formed:
- Installation Acceptance Report: Record installation process and inspection results
- Commissioning Records: Record commissioning parameters and detection results
- Performance Test Report: Test data of all performance indicators
- Training Records: Operator training content and assessment results
- Warranty Card: Filled out and stamped for confirmation
Zhejiang Lianggong's Installation Services
Zhejiang Lianggong Machinery provides professional installation and commissioning services:
- On-site Installation: Professional engineers guide installation on-site
- Commissioning Training: On-site commissioning and operator training
- Acceptance Assistance: Assist users in completing acceptance testing
- Warranty Commitment: Warranty period begins after successful installation and commissioning
For installation and commissioning services, please call 0575-87335525 to schedule.
