Technical Specification for Installation and Debugging of Vertical Large Capacity Centrifuge

1、 Preparation stage before installation

（1） Confirmation of venue conditions

1. Basic platform requirements: A reinforced concrete foundation with a thickness of ≥ 500mm, a foundation flatness error of ≤ 2mm/m ², and a bearing capacity of at least 1.5 times the total weight of the equipment (including materials) must be set up.

2. Space reservation standard: A maintenance space of ≥ 1.5 meters should be reserved at the top of the equipment, and operation and maintenance channels of ≥ 1 meter should be set up around it. Special drainage ditches (with a slope of ≥ 3%) and anti-seismic ditches (with a width of ≥ 200mm) should be configured.

3. Environmental control parameters: The installation environment temperature should be controlled within the range of 5-35 ℃, the relative humidity should be ≤ 80%, and an independent air conditioning system and dust prevention facilities should be equipped.

（2） Equipment unboxing inspection

1. Appearance inspection: Check the part numbers of the host, motor, control system, etc., and inspect the surface roughness of the drum (Ra ≤ 3.2 μ m) and the roundness error of the shaft neck (≤ 0.02mm).

2. Accessory inventory: Confirm the quantity of accessories such as shock absorber spring group, hydraulic locking device, temperature sensor, etc., and verify the random files (installation diagram, accuracy inspection report, vibration spectrum analysis diagram).

3. Storage management: Precision components need to be placed in a constant temperature and humidity chamber (temperature 20 ± 2 ℃, humidity 40-60%), and electrical components need to be dried for 72 hours.

2、 Mechanical installation process

（1） Host in place

1. Adopt the 5-point lifting method (sling angle ≤ 45 °), use a laser level to adjust the verticality of the longitudinal axis of the aircraft (error ≤ 0.05mm/m), and the horizontal levelness (≤ 0.1mm/m).

2. The anchor bolts are made of high-strength alloy steel (grade 12.9), with a pre tightening torque value set at 1200N · m, and C40 epoxy resin mortar is used for secondary grouting.

（2） Transmission system assembly

1. Belt wheel set: Adjust the coaxiality of the two axes (radial error ≤ 0.05mm, axial error ≤ 0.1mm) through a laser alignment instrument.

2. Coupling assembly: When using a rigid coupling, it is necessary to ensure a gap of 0.5-1.2mm between the end faces; when using an elastic coupling, the preload is set to 15% of the thickness of the rubber component.

（3） Shock absorption system debugging

1. Installation of air spring: The inflation pressure is set to 0.4-0.6MPa, and the static compression is controlled within the range of 20-30mm.

2. Damper adjustment: Adjust the viscosity of silicone oil (kinematic viscosity 50-100cSt) through vibration transmission rate testing (target value ≤ 0.2).

3、 Electrical system configuration

（1） Power circuit

1. Main power supply connection: Adopting a three-phase five wire system for power supply (AC 380V ± 5%, 50Hz ± 1%), equipped with surge protectors (maximum current capacity ≥ 40kA).

2. Motor parameter matching: Check the rated current of the frequency converter (usually 1.2-1.5 times the no-load current of the motor), and set the acceleration and deceleration time (acceleration ≥ 60s, deceleration ≥ 90s).

（2） Control system

1. Key points of PLC programming: Establish a speed centrifugal force dual loop control model, set overload protection threshold (triggered when the current is ≥ 1.2 times the rated value).

2. Safety interlock device: Install a rotating cover photoelectric sensor (response time ≤ 20ms), equipped with an emergency stop button (red mushroom head type, operating force 25-45N).

4、 Debugging and verification program

（1） No load trial operation

1. Jogging test: Start at a low frequency of 0.5Hz and observe if the steering is correct (counterclockwise when viewed from the shaft end) for 3 cycles.

2. Speed up test: Increase the speed to the rated speed at a rate of 10Hz/min, monitor the temperature rise of the bearing (≤ 45 ℃/h), and the effective value of the vibration speed (≤ 2.8mm/s).

（2） Load verification

1. Simulated counterweight: Use standard test blocks (density 7.85g/cm ³) to load according to the center of mass distribution, with a total mass not exceeding 80% of the design value.

2. Dynamic balance detection: Tested at 1200rpm, the radial vibration amplitude should be ≤ 0.07mm, and the axial displacement should be ≤ 0.05mm.

（3） Performance calibration

1. Centrifugal force calibration: Use a standard force measuring ring (accuracy level 0.1) to verify the centrifugal force deviation (≤± 2%) at the maximum radius.

2. Temperature control verification: After continuous operation for 4 hours, check the surface temperature uniformity of the drum (temperature difference at each point ≤ 5 ℃).

5、 Acceptance and maintenance

（1） Completion acceptance standards

1. Mechanical acceptance: Rotary balance level G0.4, axis positioning accuracy ISO 2768-mH level.

2. Electrical acceptance: Insulation resistance ≥ 50M Ω, grounding resistance ≤ 4 Ω, electromagnetic compatibility meets GB/T 17799.2 standard.

（2） Daily maintenance procedures

1. Lubrication management: The filling amount of spindle grease accounts for 70% of the bearing chamber, and it should be replaced every 3000 hours (using NSK 2 grease).

2. Precision re inspection: Conduct vibration spectrum analysis once a month and conduct comprehensive geometric accuracy testing annually (using TAYLOR HOBSON roundness tester).