Structural Characteristics and Working Condition Adaptation Comparative Analysis of Tyre type and Track type Mobile Belt Stackers

        Mobile belt stackers have become core stacking equipment for bulk‑material yards, mines, ports and infrastructure projects, thanks to their technical advantages including no requirement for fixed civil foundations, flexible relocation and rapid deployment. According to differences in travelling chassis structures, mainstream industry models fall into two major categories: tyre‑type and track‑type. As the core component for equipment load‑bearing, travelling and operational stability, the chassis directly determines terrain adaptability, operational stability, relocation efficiency, operation‑and‑maintenance cost and working‑condition adaptation scope of the equipment. There is no absolute superiority or inferiority between the two types; only scenario‑based adaptation differences exist. To resolve problems such as model mismatch, low efficiency and cost waste in engineering‑model selection, this paper systematically dissects the structural principles, core performance, advantages & disadvantages and applicable scenarios of tyre‑type and track‑type mobile belt stackers, defines refined selection criteria, and provides technical references for engineering application and equipment optimization.

1. Differences in Core Structure and Travelling Principle

        The core difference between tyre‑type and track‑type stackers lies in the travelling chassis system. Differentiated structural design brings about totally‑different operating characteristics and adaptation capacities for the two types of equipment.

    1.1 Tyre‑type Mobile Belt Stacker

        The tyre‑type stacker adopts a travelling structure consisting of solid rubber tyres, rigid wheel axles and vehicle frame, mostly with four‑wheel or six‑wheel travelling layout. It is equipped with electric or hydraulic travelling drive system. The complete‑machine chassis features simple structure and low mechanical transmission loss. The equipment realizes travelling and steering via point‑contact between tyres and ground. It shows prominent lightweight‑structure advantages, convenient assembly & disassembly and small moving resistance. It achieves smooth operation relying on elastic buffering of tyres, with low failure rate of overall mechanical structure and simple transmission logic.

    1.2 Track‑type Mobile Belt Stacker

        The track‑type stacker adopts an integrated chassis structure composed of steel track shoes, track frame, driving wheels, supporting rollers and tension wheels, and completes travelling operations through large‑area continuous contact between tracks and ground. The travelling system adopts closed‑loop circulating structure, which greatly increases ground‑contact area. Combined with full‑range hydraulic drive, it delivers large driving torque and excellent anti‑skid performance. Boasting strong overall structural rigidity and high load‑bearing capacity, it is suitable for continuous operations under heavy‑load and complex working‑conditions. Its chassis features far‑superior impact‑resistance and anti‑deformation performance compared with tyre‑type structure.

2. Comparative Analysis of Key Performance Characteristics

    2.1 Terrain Adaptability and Trafficability

        Tyre‑type stacker imposes high requirements on the flatness of operation sites, and is only applicable to flat and solid sites paved with cement, asphalt, hardened crushed stone and similar materials. It features high ground‑contact pressure and small contact area. On muddy, soft‑soil, uneven, potholed and sloped sites, it is prone to slipping, sinking and deviation. Its stability when travelling on slopes is relatively poor, with a maximum climbing angle generally ≤8°. Its trafficability is limited on complex field sites, and it is only suitable for regular operation on fixed hardened stockyards.

        Track‑type stacker delivers powerful all‑terrain adaptability. The large ground‑contact area of tracks substantially reduces ground‑contact pressure, which is merely 1/3‑1/4 of that of the tyre‑type model. It can travel stably on complex unhardened sites including muddy ground, soft slag soil, gravel stockyards, uneven wilderness and sloped roadbeds. Tracks provide great ground‑gripping friction and outstanding anti‑slip performance. Its maximum climbing angle can reach 15°‑20°. It copes well with potholes, slopes and slippery pavements, and is fully adapted to dynamic field operation scenarios.

    2.2 Mobility and Relocation Efficiency

        Tyre‑type stacker is flexible with fast relocation speed. Short‑distance site displacement can be finished rapidly. It has a small turning radius and easy operation; one single operator can complete positioning adjustment. It features light self‑weight and low travelling resistance, resulting in extremely low energy consumption during no‑load and light‑load relocation. It fits high‑frequency short‑range position‑switching operations within plant areas. Nevertheless, long‑distance highway relocation depends on trailer transportation; self‑propelled long‑distance movement is not available.

        Track‑type stacker travels at low speed with relatively sluggish steering and low short‑range fine‑tuning accuracy. It has a large self‑weight, and consumes more energy during displacement than the tyre‑type model. Its merit lies in self‑propelled long‑distance relocation on construction sites without trailer assistance. Cross‑work‑zone and cross‑point relocation in the field needs no equipment disassembly‑assembly. It achieves high setup efficiency, does not rely on hardened roads, and perfectly adapts to field operating environments without paved roads.

    2.3 Operational Stability and Load‑bearing Capacity

        Tyre‑type stacker features a relatively high center of gravity. Elastic deformation occurs on tyres, so slight shaking tends to appear under heavy‑load stacking and single‑side material distribution, and the equipment has small anti‑overturning margin. It delivers moderate overall load‑bearing capacity and is suitable for stacking operations under medium‑and‑small throughput, low stockpile height and stable working conditions. Continuous heavy‑load operation for long periods may cause tyre wear, deformation and deviation.

        Track‑type stacker is designed with a low chassis center of gravity and large supporting contact area, providing high integral rigidity, zero operational shaking and excellent anti‑overturning performance. It adapts to working conditions of wide belt width, high throughput, high stockpile height and long boom. It maintains outstanding stability under heavy‑load, eccentric‑load and sloped‑site operations, and can satisfy the demands for large‑throughput, all‑weather, continuous high‑intensity operations in mines, ports and other sites.

    2.4 Energy Consumption, Noise and Site Protection Performance

        Tyre‑type stacker has low walking friction resistance and lower energy consumption under identical working conditions. Its tyre buffer structure brings low operating noise and slight vibration. It will not compact or damage hardened pavements, showing favorable site‑protection performance and tidy operating environment. It fits factory premises, indoor spaces and scenarios with strict environmental‑protection control.

        Track‑type stacker generates large friction resistance between tracks and ground, leading to relatively high travelling energy consumption. Its vibration and noise during operation are higher than those of tyre‑type models. Steel tracks tend to compact and scratch hardened pavements, which may result in pavement damage after long‑term operation on hardened sites. It is more suitable for field operating sites without hardened pavements and without requirements for pavement environmental‑protection protection.

    2.5 Operation‑and‑Maintenance Cost and Service Life

        Tyre‑type stacker boasts simple structure, universal spare parts and convenient overhaul. Its key vulnerable component is tyre with low replacement cost and short replacement cycle. It achieves low overall failure rate and small daily maintenance workload with low comprehensive O&M cost. Adopting overall lightweight design, its frame resists deformation and delivers stable service life under conventional working conditions.

        Track‑type stacker has a complex travelling system consisting of multiple vulnerable parts including track shoes, pin shafts, supporting rollers and driving wheels. These components wear rapidly under harsh field conditions, which results in frequent overhauls, high spare‑part replacement cost and complicated maintenance procedures. Nevertheless, its frame and chassis possess high rigidity strength with excellent impact‑resistance and fatigue‑resistance performance, so it enjoys longer overall service life under high‑intensity working conditions.

3. Comprehensive Comparison Table of Parameters and Performance for Two Types of Models

4. Accurate Model‑selection Criteria for Segmented Application Scenarios

    4.1 Optimal Application Scenarios for Tyre‑type Stackers

        Combined with its performance advantages, the tyre‑type model is applicable to working conditions of fixed sites, flat pavements, frequent relocation, controllable budget and high environmental‑protection requirements. Main application cases include standardized hardened stockyards indoors and outdoors of thermal power, building‑material, grain and chemical enterprises; routine fixed‑point stacking and standardized operations of medium‑ and small‑sized production lines; stacking scenarios with short‑distance, high‑frequency site displacement and precise positioning; plant‑site environments with strict environmental‑protection control, prohibition on pavement damage and low‑noise operation; temporary small‑scale infrastructure, light‑load and intermittent stacking operations. Selecting the tyre‑type model for such scenarios can minimize equipment investment and O&M costs while meeting operation requirements, and realize energy‑saving and efficient operation.

    4.2 Optimal Application Scenarios for Track‑type Stackers

        The track‑type model is suitable for harsh working conditions of complex terrain, field operations, high‑intensity continuous production and dynamic relocation. Main application cases include open‑pit mining, tailings stockpiling and aggregate field production lines; bulk‑material transfer and large‑throughput continuous stacking operations at port terminals; field infrastructure projects such as water conservancy, highways and railways on muddy and rugged construction sites; scenarios of large‑area stockyards with scattered operation points requiring self‑propelled cross‑zone relocation; high‑intensity stacking operations with high stockpile height, long booms, heavy loads and eccentric loads. Adopting the track‑type model for such scenarios can thoroughly eliminate terrain restrictions, ensure all‑weather, stable and safe equipment operation, and avoid equipment failures and production bottlenecks caused by insufficient site adaptability.

5. Common Misconceptions in Engineering Model‑selection

        The first misconception is blindly pursuing low‑cost solutions. Selecting tyre‑type models for complex field sites will cause frequent sinking, slipping and positioning failure of equipment, greatly lowering operation efficiency and pushing up equipment failure rate, which consequently increases later‑period maintenance costs. The second is over‑specification. Applying track‑type models in fixed hardened plant areas brings redundant equipment investment, high energy consumption, pavement damage and maintenance waste, resulting in poor economy. The third is ignoring operation‑intensity matching. When tyre‑type models are used under high‑intensity continuous heavy‑load conditions, the equipment operates under long‑term overload, giving rise to tyre deformation and frame fatigue and shortening service life. In engineering model‑selection, it is necessary to abandon the “price‑only theory” and “over‑specification‑only theory”, and select proper models precisely with site terrain, operation intensity, relocation requirements and operation cycle as core references.

6. Conclusion

        The performance differences between tyre‑type and track‑type mobile belt stackers essentially come from differentiated chassis‑structure designs adapted to various working conditions. The tyre‑type model features light weight, low energy consumption, high mobility and low cost, and applies to standardized, flattened and regular‑operation industrial stockyards. The track‑type model features high stability, great trafficability, large load‑bearing capacity and all‑terrain performance, and adapts to complex field, high‑intensity and dynamic engineering operations. Each model has its strengths and complementary application scenarios; there exists no universal optimal model.

        In engineering application, comprehensive model‑selection should consider site terrain, operation intensity, relocation frequency, O&M budget and environmental‑protection requirements, so as to realize accurate matching between equipment performance and working‑condition demands, balance operation efficiency, operational stability and long‑term economic benefits, make full use of flexible‑operation advantages of mobile stacking equipment, and provide equipment guarantee for quality‑and‑efficiency improvement of bulk‑material stockpiling‑and‑transport systems.