To determine whether the double-stage NGW121 planetary gear reducer needs to be repaired or replaced, you can start from the following aspects: Appearance inspection: Check whether the reducer shell has cracks, deformation or damage. If these situations exist, it may affect the stability of its internal structure and needs to be repaired or replaced. Check whether the connection parts, such as bolts, nuts, etc. are loose. Loose connections may cause vibration and abnormal noise during operation. They need to be tightened in time. If the connecting parts are damaged, they need to be replaced. In addition, it is necessary to observe whether there is any oil leakage. If lubricating oil leaks in the oil seal, end cap, etc., it may be that the seal is aging or damaged, and the seal needs to be replaced. Sound judgment: The sound of the reducer in normal operation is stable. If there is a harsh, sharp, impactful or irregular sound during operation, it may be caused by gear wear, poor meshing, bearing damage, etc. It is necessary to further check the internal components and determine whether to repair or replace according to the degree of damage. Temperature inspection Read More

The following are some common installation errors that affect the normal operation of the NGW42-35.5-7.5KW planet reducer: Coaxiality difference: The centering deviation between the motor and reducer coupling is too large, and the radial deviation is > 0.1mm Or the angle deviation is >0.05mm When the input bearing is subjected to additional bending moment. In addition, if special tooling is not used during installation, knocking the bearing will cause loose fit between the inner ring and the shaft journal, and the interference amount is less than <0.003mm, which will cause minor wear. These situations may affect the normal operation of the reducer, resulting in the appearance of the outer ring raceway of the bearing 'False Brunch indentation', uneven wear of gears along the tooth width direction. Improper adjustment of meshing clearance: The gear meshing gap is too small, and the teeth surface will be adhered and worn due to compression under load; the side gap is too large, and impact load will be generated during startup or reversing, causing the teeth surface to peel off. Data show that for every 0.02mm reduction in side gap, the contact stress of the tooth surface increases. Read More

DFY320 Hard-toothed gear reducer is mainly composed of gears, gear shafts, box and other components. When choosing suitable materials, you must comprehensively consider the working requirements and performance characteristics of each component. The following are specific material selection methods: gear and gear shaft material considerations: strength and hardness need to be considered to meet the load-bearing capacity requirements; wear resistance to ensure service life; corrosion resistance, adapt to specific working environments; processing performance, easy manufacturing and processing; and cost, comprehensively considering cost-effectiveness. Material recommendation: Commonly used materials include 20CrNiMo, 20CrNi2Mo, 42CrMo and other fine rolled alloy steels. These materials have high strength and toughness and are suitable for high-speed and high-load transmission requirements. 20CrMnTi can also be used, which can meet the requirements of hard-tooth surface gear after carburizing, high-frequency surface quenching heat treatment specifications and teeth grinding. Cabinet material considerations: The box must bear the support shaft system, sealing and lubricating medium, and bearing Read More

The optimization of the heat treatment process of the DFY280 reducer requires comprehensive consideration of factors such as material characteristics, part structure and performance requirements. The following are some optimization methods under the premise of ensuring stable quality: Reasonable selection of heat treatment methods Surface quenching: For the gears of the DFY280 reducer, high-frequency quenching can be used if the size is small; if the size is larger, flame quenching is more suitable. Surface quenching can improve the hardness of the tooth surface. It is best when the hardened layer includes the bottom of the tooth root, making the hardness reaching 45-55HRC while maintaining the toughness of the heart. Carburizing quenching: If the gear requires a large load-bearing capacity, the carburizing quenching process can be selected. However, the gear will deform after carburizing and quenching, and the finishing process needs to be used to eliminate it to ensure the accuracy of the gear. Nitriding: Nitriding can achieve high tooth surface hardness and wear resistance under conditions of small deformation, and can improve the load-bearing capacity without finishing the finish after nitriding, which is suitable for precision. Read More

To ensure the mass stability of the heat treatment process in the DFY225 gear reducer, you can start from the following aspects: Control the material quality: Choose steel with narrow hardenable belts, because the narrower the hardenable belts, the more stable the deformation. At the same time, controlling the A1/N content ratio in the range of 1-2.5 can narrow the hardenable belt and reduce deformation. Pay attention to the frame segregation and strip-like structure of the material to avoid affecting the uneven deformation and uneven carburization of the gear spline holes. Optimized preparatory heat treatment: For gear forgings of DFY225 gear reducer, if the normalized hardness is too high, the crystal is mixed, and a large amount of Sorthine or Wei's tissue is present, the inner hole will be deformed and enlarged. Therefore, temperature-controlled normalized fire or isothermal annealing can be used to treat the forgings to obtain appropriate tissue and hardness, laying a good foundation for subsequent heat treatment. Precisely set process parameters: Heating temperature and time: Accurately according to the characteristics of gear material and heat treatment process requirements Read More

There is currently no specific study on the impact of heat treatment process parameters on the mass stability of DFY250 gear reducer, but it can be analyzed from the perspective of the general impact of heat treatment process parameters on gear reducer, as follows: The influence of heating temperature and time on gear hardness and wear resistance: Heating temperature and insulation time are key factors affecting gear hardness. For example, during the quenching process, appropriately increasing the heating temperature and maintaining sufficient time can make the gear material fully austenitized, and a higher hardness can be obtained after quenching, thereby improving the wear resistance of the tooth surface. However, if the heating temperature is too high or the time is too long, it may cause coarse grains, causing the toughness of the gears to decrease and cracks are prone to occur. Effect on gear deformation: Uneven heating temperature will cause inconsistent expansion of various parts of the gear, resulting in thermal stress, and thus deformation. For the gears of the DFY250 gear reducer, the higher the carburization temperature, the thicker the carburization layer, and the gear deformation Read More