Head Wheel Assembly in Stacker-Reclaimer

Head Wheel Assembly in Stackers and reclaimers

Function

• Material Stacking: The Head Wheel Assembly is a key component of the stacker arm, responsible for evenly distributing material from the conveyor belt onto the stockpile.
• Material Retrieval: During reclaiming, the Head Wheel Assembly works in conjunction with the scraper conveyor system to retrieve material from the stockpile and transport it to the central drop hopper.

Structural Components

• Head Wheel: Includes drive pulleys and redirecting pulleys that guide the conveyor belt.
• Scraper Conveyor System: Connected to the Head Wheel Assembly, it uses scrapers to move material to the central drop hopper.
• Counterweight System: Located at the rear of the assembly, it balances the upper structure of the stacker/reclaimer.

Working Principle

• Stacking Process: The Head Wheel Assembly guides material from the conveyor belt onto the stockpile. The stacker arm performs reciprocating rotational movements driven by a slewing mechanism, while the hydraulic luffing system adjusts the height of the stacker arm to create a continuous, herringbone-shaped stockpile.
• Reclaiming Process: The Head Wheel Assembly works with the scraper conveyor system to retrieve material from the stockpile. Scrapers collect material and transport it to the scraper conveyor chain, which then moves it to the central drop hopper.

Key Features

• High Efficiency: The Head Wheel Assembly is designed to achieve efficient material stacking and reclaiming through precise control and drive systems.
• Reliability: Made from high-strength materials and equipped with advanced lubrication systems, it ensures long-term stable operation.
• Flexibility: Hydraulic systems and variable-frequency speed control allow the Head Wheel Assembly to adjust stacking and reclaiming angles and speeds dynamically.

Maintenance and Operation

• Lubrication System: The Head Wheel Assembly is equipped with either dry or wet lubrication systems to ensure centralized lubrication at all lubrication points.
• Regular Inspection: Routine checks are required to monitor wear and tear, lubrication status, and the integrity of the scraper system.

Technical Features of Stacker-Reclaimer

The stacker-reclaimer is an efficient and continuous loading and unloading machine, which is mainly used for loading and unloading iron ore, coal, sand and other materials in bulk yards of bulk cargo terminals, steel mills, large thermal power plants and mines. Stackers are widely used at home and abroad due to their high operating efficiency. Stackers are generally composed of four parts: a variable amplitude mechanism, a traveling mechanism, a bucket wheel mechanism and a slewing mechanism, which can complete the dual tasks of stacking and retrieving coal. According to different usage scenarios, stackers are divided into circular stockyard mixing stackers and bucket wheel stackers. The circular stockyard mixing stacker-reclaimer is installed in a closed circular material room, and adopts a continuous herringbone stacking and comprehensive retrieving stacking and retrieving process. It is mainly used in cement, chemical, coal, thermal power and other projects. The bucket wheel stacker-reclaimer is an efficient loading and unloading machine that can both stack and retrieve materials and can continuously convey materials. It is suitable for large dry bulk yards and has multiple control modes such as manual, semi-automatic and automatic.

1. Equipment Introduction
The circular stacker-reclaimer is mainly composed of a stacker and a reclaimer. The stacker is mainly composed of a cantilever stacking belt conveyor, a center column slewing mechanism, a hydraulic luffing mechanism, etc.; the reclaimer is mainly composed of a bridge, a scraper conveying system, a material rake system, an end beam travel mechanism, and an electronic control system.

2.  Advanced manufacturing process
Customized design: Our company only makes accessories for stackers, such as scrapers, head and tail sprocket devices, guide wheels, chains, travel devices, etc., and can go to the site to survey and draw drawings.

Manufacturing process: The scraper conveying system consists of: several hangers are hung under the bridge, and two chain guide grooves are set on the upper and lower parts of the hanger, and an anti-deflection guide groove is set in the middle of the upper part and the middle of the lower part. Two conveying chains are installed in the upper and lower left and right chain guide grooves, and a broken line scraper is set between the two chains. The head is provided with a transmission sprocket and a driving device, and the tail is provided with a tensioning sprocket and a tensioning device.

The hanger is welded by I-beam and steel plate, and the upper part is connected to the bridge by bolts. The main function of the guide groove is to support the chain, and the chain is a non-standard large pitch sleeve roller conveyor chain. The roller runs on the track equipped with wear-resistant strips in the guide groove.

The sleeve roller chain pitch is 315mm, and a scraper is installed for two pitches. The scraper spacing is 500mm. The scraper is in a broken line shape. The flange on the scraper and the chain side ear are fixed with bolts. The main bolt of the scraper is a steel plate structure composed of Q235-A steel plate.

The driving part consists of a three-phase asynchronous motor, a hydraulic coupling, and a reducer. The scraper system drive is a chain transmission mechanism. The driving device is located at the head. Two driving sprockets are installed on the sprocket shaft to drive the chain to achieve the operation of the scraper.

The tail tensioning part adopts a composite spring buffer tensioning form, which includes a tail sprocket, a sprocket shaft, a tensioning bearing seat with a sliding track, a tensioning screw and a composite buffer spring. The tensioning of the chain is completed by adjusting the nut on the screw. The role of the buffer spring is that due to the small number of sprocket teeth and large pitch, the chain will produce periodic changes in the center distance of the sprocket when rotating, that is, pulse vibration occurs. The buffer spring can reduce this vibration and improve the stability of the chain movement.

Quality control: Strictly operate in accordance with the requirements of the 9001 quality management system.

3. Strict inspection
Each product is inspected before delivery, including material testing and physical performance testing to ensure functional performance.

Performance indicators

1. After the scraper and chain are installed, they should rotate flexibly. All bolt connection parts must be firm and reliable.
2. The site of use and the user must do a good job of pre-use training and safety training to avoid safety accidents.
3. The normal use of the scraper can reach 30,000 hours.

Application

It is suitable for mining, metallurgy, building materials, chemical industry, coal and other industries, and is used to transport materials of different particle sizes and different bulk densities.

Why choose Huifu Company?

Choose Huifu Company for its comprehensive solutions in machinery manufacturing, processing, and maintenance, backed by over ten years of industry experience. Their one-stop services, including custom design and production of non-standard products, meet diverse needs efficiently. With a strict quality control system, they ensure every product is reliable and safe. Their professional team provides robust technical support, while their innovative patents, such as mobile reversible belt conveyors and foundry sand recycling processes, demonstrate their commitment to industry leadership. Huifu’s customer-first philosophy ensures personalized services and long-term partnerships. Partner with Huifu to achieve project success with high-quality products and dedicated support.