1. Analysis of the causes of failure of roller press reducer bearings 1. Exceeding load and fluctuation impact The roller press is a low-speed, high-heavy-load equipment. In actual operation, due to the mixing of foreign matter, uneven cutting, and the uneven unevenness of the roller surface caused by long-term operation, the reducer will inevitably have overloading, jamming, and fluctuating overloading during operation. Exceeding the standard and fluctuating these loads will cause the tooth surface and bearing surface to break. If not discovered in time, the situation will deteriorate rapidly. 2. Severe impact caused by intrusion of metal foreign objects. When larger metal objects (such as grate cooler hammers, loader shovel heads, steel balls, etc.) enter the roller gap squeeze zone, they will cause huge instantaneous impacts to the roller surface and bearings. This impact will cause local fatigue damage to the bearing surface. As the equipment continues to operate, the fatigue area will further expand, eventually leading to pitting and peeling of the bearing. In severe cases, it may even cause the outer ring and inner ring of the bearing to break and fail due to impact. 3. Bearing chamber extrusion deformation and misalignment in harsh working conditions Read More

1. Root causes of water seepage failures and corrective measures In heavy-load, high-humidity or dusty environments such as roller presses, cooling water, production steam and metal impurities can easily invade the interior of the reduction gearbox. 1. Analysis of the root cause of water seepage: external water vapor intrusion: The equipment has been in a high temperature and high humidity environment for a long time, and cooling water or steam invades from weak locations such as the box joint surface and sealing gap. Cooling system water quality problems: The quality control of circulating cooling water is not strict. The calcium and magnesium carbonates in the water decompose when heated to form scale. In severe cases, the pipelines will be blocked, affecting the cooling efficiency and increasing the system resistance. 2. Thorough rectification measures for water seepage: Strengthen external sealing and protection: Implement the 'plugging loopholes and strong sealing' transformation plan, strengthen the joint surfaces of the box, sealing gaps and other parts that are easy for water to enter, and block the external water vapor intrusion channels. Add hydrophobic and diversion structures: Optimize the box structure to 'drain water', for example, add diversion grooves in areas prone to water accumulation to prevent water from accumulating near the sealing surface. strict Read More

1. Drive shaft concentricity and alignment adjustment are the core aspects of installation. When connecting, it must be ensured that the concentricity of the output shaft of the reducer and the input shaft of the motor (or the main shaft of the working machine) is consistent, and that the outer flanges are parallel. Excessive concentricity error will cause the output bearing to be subject to additional radial force. Under long-term action, the shaft will be forced to bend, the metal structure will be damaged, and eventually the shaft will be broken or the gear will be damaged. It is recommended to use a dial indicator or laser alignment instrument for precise alignment. The radial deviation and angular deviation must be strictly controlled within the coupling compensation range. 2. Violent knocking is strictly prohibited. When installing transmission parts (such as sprockets and gears) on the output shaft, direct knocking with hammers and other tools is absolutely not allowed. Excessive axial force or radial force generated by violent knocking can easily damage the internal parts of the reducer. The correct approach is to use the assembly clamp and the internal thread of the shaft end to press the transmission part in smoothly with bolts. 3. Coupling Selection and anti-loosening measures should try to avoid using rigid fixed couplings. Read More

1. Selection and replacement of lubricating oil viscosity in winter (low temperature environment): When the temperature is low, the grease in the reducer tends to become thicker, which may cause the overload protection to be triggered due to excessive load when the equipment is started. Therefore, lubricating oil with smaller viscosity and low freezing point (such as gear oil HL20) should be selected in winter to ensure that the oil can reach a suitable temperature and good fluidity before starting. Summer (high temperature environment): High temperatures in summer will accelerate the oxidative deterioration of lubricating oil and cause its viscosity to be diluted, thereby significantly reducing lubrication, heat dissipation and protective performance. In order to adapt to high-temperature working conditions, gear oil with high viscosity and high temperature resistance (such as gear oil HL30) must be replaced in summer to prevent oil failure and excessive wear of components. 2. Special requirements for adjusting the oil change cycle in summer: Since the grease loss rate of equipment doubles in high temperature environments, and the oil is easily aged, the oil change cycle of the reducer should be appropriately shortened in summer or under severe working conditions ( Read More

1. Extremely strong resistance to overload and impact. In the production process of wire drawing machines, especially the rough drawing process, the equipment often faces working conditions of high load, frequent starts and stops, and large load fluctuations. The cycloidal pinwheel reducer performs well in this regard: multi-tooth meshing distributes the load: the meshing of the cycloid wheel and pin teeth usually involves multiple teeth in simultaneous contact (about 30% to 50% of the teeth participate in meshing), the load is evenly dispersed, and the unit tooth surface pressure is small. Material and structural advantages: The core components are made of high-strength alloy cast iron or ductile iron, combined with surface-hardened bearing steel pin teeth, so that they can withstand large impact loads. High overload multiple: Its overload capacity is usually 2 to 3 times that of ordinary gear reducers. It is very suitable for heavy-load working conditions such as wire drawing machines. It can effectively buffer the impact of equipment transmission and solve problems such as heavy-load slippage and start-stop jitter. 2. Smooth operation, low noise and low vibration. Wire drawing operations have extremely high requirements on the stability of the equipment. The cycloidal pinwheel reducer can provide Read More

1. Tooth surface wear and gluing Under severe impact conditions of wire drawing load, if the reducer is poorly lubricated (such as insufficient lubricating oil, deteriorated oil quality or containing impurities), an effective oil film will not be formed between the sliding surfaces of the gears, resulting in dry friction. This will aggravate the friction loss of tooth surface materials and cause serious mechanical wear; in extreme cases, it may even cause tooth surface gluing, seriously affecting transmission accuracy. 2. Tooth surface fatigue spalling (pitting corrosion) The wire drawing machine has been subjected to heavy load and impact for a long time. When the gear is working under conditions close to or exceeding the contact stress determined by the design, contact fatigue is very easy to occur. Repeated contact stress will cause fatigue cracks on the tooth surface or subsurface, which will cause the tooth surface material to flake off (i.e. macro pitting or spalling), which is one of the common damage forms of hard tooth surface gears. 3. Broken gear teeth (broken teeth) Frequent starts and stops and torque fluctuations of the wire drawing machine will produce huge bending stress and impact load. If the gear material itself is strong Read More