Is the tapered feeder unstable? Common troubleshooting

1. Error phenomenon and possible causes

2. Troubleshooting and solutions for conical feeder

• Material bridge building (rat hole phenomenon)

reason:

Unreasonable design of the cone angle (usually ≥60°)

High moisture content of materials (>5% prone to adhesion)

Insufficient vibrator power or wrong installation position

Solution:

Renovation of the hopper: increase the cone angle or install the arch breaking device (such as pneumatic hammers, flexible linings)

Adjust the vibrator:

Vibrating motor tilt installation (15°~30° to the horizontal plane)

Increase the frequency to above 50Hz (need to combine material characteristics)

• Vibration motor failure

Troubleshooting steps:

Check the power supply: Use a multimeter to measure the voltage (380V±10%)

Test vibration force:

Disconnect the power supply and manually rotate the eccentric block to confirm flexibility

Measure amplitude (normal value 1~5mm, depending on model)

Listen to the abnormal sound of the bearing: there is a noticeable "kick" sound when damaged

Solution:

Replace damaged bearings

Adjust the angle of the eccentric block (change the excitation force)

• The discharge port is blocked

Common scenarios:

Viscous materials (such as starch, calcium carbonate)

Inadequate opening of the discharge valve or a pneumatic actuator failure

Solution:

Instant treatment: Use a rubber hammer to tap the side wall of the hopper (do not use metal tools!)

Long-term prevention:

Heating hopper (for hygroscopic materials)

Use T-shaped or fan-shaped gates instead (avoid material accumulation)

• The sealing failure causes powder leakage

Key Checkpoints:

Silicone sealing ring: Whether it is hardened and cracked (usually 2 years)

Pneumatic balance: Is the negative pressure of the dust removal system too high (recommended -500~-1000Pa)

Solution:

Replace with fluoroelastic sealing ring (temperature resistance of 200℃ or above)

Install pressure balance valve

• Material layering (thickness separation)

reason:

Vibration frequency is too high (light particles float)

No flow guide in the hopper

Solution:

Reduce vibration frequency (20~35Hz recommended)

Install the deflector or switch to the double-cone structure

• Control system issues

Inverter parameter setting error:

The acceleration time is too short (should be >5 seconds)

Multiple feeders are not synchronized

Solution:

Reset parameters (refer to model manual)

Enable PID closed-loop control (flow feedback adjustment)

3.Conical feeder maintenance guide

Daily maintenance (operator execution)

• Check before running

Vibration motor status:

Check whether the power cord is damaged and whether the grounding is reliable.

Manually pull the eccentric block to confirm that there is no obstacle.

Hopper and discharge port:

Observe whether there is material accumulation or adhesion (especially for sticky materials).

Check whether the discharge valve is flexible to open and close.

Sealing test:

Observe whether there is any dust leakage during operation (focus on checking the flange interface).

• Monitoring during operation

Abnormal vibration or noise:

If the vibration amplitude suddenly increases, stop immediately to check the bearing or fastener.

Flow stability:

Record the fluctuations in the discharge speed (normal deviation should be <5%).

• Clean up after shutdown

Remove residual material:

Use a soft brush or compressed air to clean the inner wall of the hopper (scraping with metal tools is prohibited).

Power off maintenance:

Clean the motor heat dissipation holes to prevent dust from accumulating and affecting heat dissipation.

Regular maintenance (monthly/quarterly)

• Vibration motor maintenance

Bearing lubrication:

Add high-temperature grease every month, and the amount of grease is 60% of the bearing cavity.

Eccentric block calibration:

Check whether the angle of the eccentric block is consistent (Error <5°), otherwise it will cause an imbalance in the excitation force.

• Sealing system inspection

Replace the sealing ring:

The silicone sealing ring is replaced every 2 years, and the corrosive environment is changed to fluoroelastic material.

Airtightness test:

Use foam agent every quarter to detect whether the flange interface is leaking.

• Structural parts tightening

Bolt preload review:

Use a torque wrench to tighten the key bolts (such as motor base bolts that require 35~40N·m).

Wear-resistant lining inspection:

Measure the remaining thickness of the lining plate (replace if the original thickness is 50%).