English (UK) 
简体中文 I. Vertical installation of the core: why is your grain always stuck halfway down?
The old king last year installed Ljxy spiral machine transport wheat, three days and two days blockage stoppage. Disassembled to take a look -The propeller shaft is twisted.Vertical lifter is afraid of axis deviation! Vertical elevator is afraid of axis deviation, more than 0.5mm / metre will let the corn kernels in the wall of the pipe hit the "scar area", and eventually plate into blocks.
Three steps to avoiding the pit.
- Laser calibrated axes: Laser from the tail bearing housing to the drive end with an offset of ≤ 2 mm (measuring the clearance with a plug gauge)
- Segmented grouting strategy: The foundation was poured in three pours (see Fig. 1), with a 48-hour hardening interval each time, to avoid base settlement
- Pre-Pressure Compensation Tips: Add 3 tonnes of counterweights to the bearing blocks when lifting to counteract the downward pressure of fully loaded grain.
Grain factory blood lesson: a factory saved the calibration step, the result of 30 metres of elevator bending 5cm in the middle, the monthly loss of more than 20,000 yuan to clear the blockage!
Second, anti-blocking practice: how to silky-smooth corn kernels climb 30 metres?
Grain conveying is most afraid of humidity changes. When the water content of wheat exceeds 14%, Ljxy tube wall will be knotted "flour shell".Double-edged spiral blades + Nitrogen blowingThat's the ultimate solution:
| Conventional Blade | Ljxy Anti-Blocking Blade | Effect Comparison |
|---|---|---|
| Full-width welding | Dense anterior section + sparse posterior section | Front section breaks up lumps, back section pushes evenly |
| Plain carbon steel | 304 stainless steel mirror polishing | Reduced coefficient of friction 60%, corn kernels do not stick to the wall |
| No auxiliary systems | 0.3MPa pulse nitrogen valve | Jet 0.5 seconds for every 10 metres of lift to break up the crust |
Operational mnemonics.
- High-moisture grains (e.g. rice ≥ 18%) →Open the nitrogen valve full.The gas consumption is 0.8 m³ per hour.
- Dry pellets (wheat ≤ 12%) →Shut off rear section nitrogenEnergy saving and consumption reduction
Third, the motor selection trap: why 55kW motor burned?
Last year's lesson from a grain depot in Northeast China: using a general-purpose motor to drive a corn elevator with a torque surge of 300% at start-up at minus 25°C!Ljxy'sInverter motor + low temperature greaseThat's the way to go:
Motor protection 3-piece set.
- Torque Sensor: real-time load monitoring, overload 10% automatic speed reduction (20 times more sensitive than thermal relays)
- Shaft Heating Tapes: -15℃ environment preheat the bearings 30 minutes in advance to avoid freezing
- Double Sealed Bearing Housing: Prevention of water vapour intrusion (grain dust will slough off in the presence of condensate).
Measured data: -20℃ environment, 7.5kW motor with preheating function saves 41% electricity than the ordinary model.
Fourth, fault emergency room: how to block the material in the middle of the night?
Scenario 1: Sudden stoppage of the hoist
→ Press emergency stop first! Three steps to dismantle and inspect:
① Hand disc drive shaft (Can rotate?) Check motor power supply; stuck? Check bearing temperature)
②Hot bearings + rattling→ Remove cover and replenish lithium grease (add no more than cavity 60%)
(iii)Cold shaft head with no vibration→ Check whether the torque limiter is slipping (adjust the friction disc gap by 0.8mm)
Scenario 2: "Dumpling" type of flow breakage at the discharge port
→ The probability is that the suspension bearing is "bridged"! Contingency plan:
- Remove the viewing port withHigh-pressure air gun inserted at an angle of 45°Blow-off (Pressure ≤ 0.4MPa)
- Long-term programme: retrofitting at hangersVibration motor(Amplitude ≤ 0.5mm, frequency 15Hz)
Personal opinion: don't save money on bearings!
I've seen too many grain companies use common bearings to save $8,000 and end up spending an extra $30,000 a year to repair their machines.Ljxy'sSelf-aligning roller bearingsIt can carry a shaft deflection of 0.3° and lasts 3 times longer than standard bearings. It is more recommended to add the inletElectromagnetic separator--Last year a customer mixed in bolts that caused the blades to crumble, and the repair cost was enough to buy ten iron removers. Remember.Vertical conveyor is not a lump of iron, it is a breathing organismThe smallest changes in temperature, humidity, and material flow are chewing away at equipment life. Spending two hours a month doing a full machine vibration check is far more cost effective than losing a day of production downtime.
