2023-01-31
How to maintain a Luoyang road roller?
How to maintain a road roller? 1. Perform routine technical maintenance in accordance with the engine’s operating manual, and apply anti‑rust treatments; 2. Clean both the interior and exterior surfaces of the roller thoroughly. When possible, store it indoors in a warehouse; if parked outdoors, place it in a well‑ventilated area and cover it with a tarpaulin.
2023-01-31
Recently, the Ministry of Education released the fourth batch of the “1+X Pilot Institutions and Vocational Skills Level Certificates” list. SANY Heavy Industry, in collaboration with Shugen Interconnect, was successfully selected and will undertake the level certification for two types of 1+X certificates: “Quality Inspection of Prefabricated Concrete Components” and “Industrial Digital Twin Modeling and Application.” Actively applying and shouldering social responsibility It is understood that the 1+X certificate system represents a key innovation under the “National Vocational Education Reform Implementation Plan.” Here, “1” refers to the academic degree certificate, while “X” denotes various vocational skills certificates, aiming to encourage students to obtain multiple professional qualifications alongside their academic credentials.
2023-01-12
Some Common Knowledge About Road Rollers in Luoyang
Impact rollers are widely used in numerous fields, including highways, railways, dams, airports, residential buildings, industrial plants, and housing developments. They are employed to compact foundations at sites containing chemical waste, fly ash, coal, and other bulk materials; to consolidate earthworks with high moisture content; and to compact foundations in rock masses, light clays, and expansive soils. Impact rollers can also be utilized for outdoor compaction of coal and rock foundations to enhance fire resistance.
2023-01-12
Precautions for Operating Small Vibratory Rollers
The role of small vibratory rollers is of paramount importance among the many types of road‑base construction machinery, particularly in highway construction, where they are indispensable. Owing to their excellent performance, they are widely employed. However, with their high technological content and complex design, significant differences can arise between the working environment and the operator’s skill level, leading to occasional issues or common malfunctions. To ensure consistent, reliable operation, it is essential to carry out thorough daily maintenance and routine upkeep. Below, we will outline the detailed procedures for such maintenance and servicing.
2023-01-12
Structural Features of Vibratory Rollers
Various types of vibratory rollers are equipped with excitation devices within the compaction unit. When the vibratory roller is in operation, the exciter is energized, generating a vibrational force. Under the action of this force, the vibrating drum produces a specific amplitude and frequency of vibration, which, together with its stroke, exerts compactive pressure on the material being compacted. Static rollers and tire rollers, by contrast, do not rely on mechanical pressure; instead, they achieve compaction through negative pressure generated by their structural design. Because vibratory rollers incorporate an internal vibration source, their compaction mechanism differs fundamentally from that of static rollers. Typically, the vibrator of a vibratory roller consists of a vibration shaft and a set of eccentric weights mounted on it, with adjustable shaft mass and eccentricity. During operation, the vibration shaft drives the eccentric weights to rotate, and the centripetal force produced by these weights generates a vibrational force that acts on the road‑rolling system. Under this vibrational force, the drum undergoes forced vibrations at a frequency equal to the number of cycles of the applied force. Throughout the period of forced vibration, the resulting vibrational pressure waves propagate rapidly through the soil layers, causing both the material and the drum to vibrate in unison, thereby forming a “rolling-body” vibration system.
2023-01-12
Vibratory rollers offer the following advantages:
During operation of the vibratory roller, the vibration shaft and the vibrating rolling bearings are continuously subjected to cyclically varying vibrational loads. Because the vibration shaft rotates at high speed, a lubricant is required. Typically, the grease in the vibration chamber is impacted by the eccentric weights, and the oil is agitated to create splash lubrication, which can cause grease to leak from both sides of the vibration shaft. The vibratory drum generally features a nested cylindrical structure, with the inner cylinder serving as the grease reservoir; grease can be replenished through internal fittings, and oil traces on either side indicate the grease level. The two ends of the vibratory drum are mounted on T‑shaped steel brackets, while the outer end is connected to a rotary cover equipped with a skeletal seal. The eccentric weights rotate together with the vibration shaft, stirring the oil in the vibration chamber and generating splash lubrication. Key factors contributing to leakage in the vibration chamber include: the design and manufacturing quality of critical components, improper selection of skeletal seals, assembly errors, reduced lubricant viscosity due to vaporization, and the presence of foreign matter or accumulated high‑temperature food residues during operation. Control measures involve improving the structural design and selecting appropriate, properly matched skeletal seals.
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