Excavators are complex machines designed for earthmoving and construction tasks. Their basic structure typically includes a power unit, working equipment, a rotating mechanism, steering system, transmission system, travel mechanism, and various auxiliary components. These parts work together to enable the machine to perform digging, lifting, and other essential functions on a construction site.
Visually, an excavator can be divided into three main sections: the upper rotating platform, the working device, and the undercarriage or travel mechanism. Depending on its design and application, excavators come in different types, such as crawler-mounted, wheeled, trackless, fully hydraulic, semi-hydraulic, full-rotation, non-full-rotation, general-purpose, special-purpose, articulated, and telescopic arm models. Each type is suited for specific environments and tasks, offering versatility across industries.
The working device is the part responsible for directly performing excavation tasks. It consists of three main components: the boom, the dipper (or stick), and the bucket. These elements are connected through hinges and controlled by hydraulic cylinders that allow for precise movements. The boom can be raised or lowered, the stick can extend or retract, and the bucket can rotate to dig and move material efficiently. To adapt to different construction needs, excavators can be fitted with a wide range of attachments, such as buckets, clamps, rakes, hammers, and dozers, expanding their functionality on-site.
The swing and travel mechanism forms the core of the excavator’s body. The engine, which serves as the primary power source, is usually located on the upper part of the rotating platform. While most excavators use diesel engines for their power and portability, electric motors can also be used in certain applications, especially in indoor or environmentally sensitive areas. The power generated by the engine is transferred to the hydraulic system, allowing the machine to operate its various functions smoothly.
The transmission system plays a crucial role in transferring the engine's power to the actuators, such as hydraulic motors and cylinders. This system ensures that the energy from the engine is effectively converted into mechanical motion, enabling the working device to perform digging, lifting, and other necessary operations. Whether it's a standard hydraulic system or a more advanced configuration, the transmission mechanism is key to the excavator’s performance and efficiency.
Refractory clay bricks use hard clay clinker, soft clay as the main raw material, according to certain particle size requirements for the ingredients, after molding, drying, firing at a high temperature of 1300 ~ 1400 ℃. Clay brick belongs to the weak acid refractory products, can resist the erosion of acidic slag and acidic gases, the resistance to alkaline substances is slightly worse. Clay bricks have good thermal properties and are resistant to rapid cooling and heating.
Clay Refractory Bricks,High Alumina Refractory Bricks,Good Abrasion Resistance Refractory Bricks
Huixian Xinwei Refractories Co. , https://www.xinweirefractory.com