Low Type Heavy-duty Industrial Caster Low Type Heavy-Duty Industrial Caster,Industrial Caster,Nylon Wheel,Universal Casters BENYU CASTERS & WHEELS CO.,LTD , https://www.benyucaster.com
The Heavy Plate Feeder Overhaul Solution
I. Working Principle of the Heavy Plate Feeder
The heavy plate feeder operates by using a motor that drives the rotation through a coupling and a reducer, which in turn rotates the spindle assembly. The sprocket mounted on the spindle meshes with the chain, causing the chain plates to move linearly and transport materials toward the main feeder. A backstop is installed within the reducer to prevent reverse rotation when the machine is stopped. The feeding speed can be adjusted using a frequency conversion control system, allowing for precise regulation based on operational needs.
II. Structure of the Heavy Plate Feeder
1. Drive Unit: Composed of an electric motor, coupling, orthogonal and planetary gear reducers, frame, torque rod, and disc lock.
2. Sprocket Spindle Assembly: Made up of a shaft, bearing housing, sprocket, support rollers, and expansion sleeve.
3. Tensioning Device: Utilizes a screw-thread mechanism to maintain tension on the chain. It includes shafts, support rollers, expansion sleeves, sliding bearing seats, composite springs, and tie rods.
4. Frame and Hopper: Constructed from welded I-beams, channel sections, and steel plates. The hopper and funnel are designed to store and guide material, with a chain screen to prevent debris from escaping and rubber curtains to minimize dust.
5. Chain Device: Consists of links, chain plates, and bolts. The chain plates are made from manganese steel, stamped and welded for durability. Rollers support the chain, while return idlers are guided by carrier wheels.
III. Maintenance and Overhaul of the Heavy Plate Feeder
Based on its structure, the key components requiring maintenance include the drive unit, spindle assembly, tensioning device, chain plates, and rollers. During the major overhaul of the B1500×9000 heavy plate feeder, the worn-out chain plates, guide rollers, and carrier wheels were replaced.
1. Removal Procedure:
- First, remove the plate feeder and upper hopper.
- Next, take off the drive unit and spindle assembly.
- Loosen the tensioner.
- Finally, remove the chain plate assembly.
2. Disassembly of the Drive and Spindle Units:
Begin by loosening the bolts connecting the drive unit to the spindle’s locking plate. Remove the drive unit, followed by the cover, stuffing box, spacer, and retaining ring. Install disassembly washer MB74H and nut HM74H, then use a withdrawal screw to extract the bearings and taper bushing.
3. Removing the Sprocket and Support Wheel:
Gradually loosen the set screws on the expansion sleeve to detach the sprocket and support wheel.
4. Adjusting the Tensioner:
Use wrench D137-11 to loosen the tail tensioner nut, then move the rollers to the minimum position to relax the chain.
5. Removing the Chain:
Carefully locate the chain hinges (marked during installation) and tap them with a handkerchief to remove the pins. Divide the chain into sections and lift it with a crane.
6. Replacing Components:
Install new rollers, carrier wheels, and supports, ensuring the roller centerline remains parallel to the rack at 1/1000 mm per chain width.
7. Reassembling the Chain:
Connect the new chain plates into sections and align them under the frame. Ensure the side plates match the height of the carrier wheels, and slide the chain from one end to the other before connecting both ends.
8. Installing the Spindle Assembly:
Ensure all bolts on the sprocket expansion sleeve are tightened to 580 N·m.
9. Securing the Chain:
Re-tighten the bolts connecting the chain to the chain plates.
10. Reinstalling the Drive Unit:
Mount the drive unit and adjust the torque rod according to the original positioning.
11. Final Tightening:
Secure the locking plate and assembly support.
IV. Adjustment of the Plate Feeder
1. Before testing, check the reducer's rotation direction—reverse rotation must be avoided.
2. Adjust the tensioning screw to ensure the chain is properly tight and the tension on both sides is balanced.
3. Inspect the link bolts for looseness.
4. Check the oil level in the reducer.
5. Verify that all bolts on the machine are securely fastened.
6. After a one-hour low-speed no-load run, the feeder can be reloaded for operation.