Characteristics and development of hydraulic excavator rotary reducer Wang Chengliang 1 Wang Zhenqiang 21 Taian Taishan Fushen Gearbox Co., Ltd., Taian 2712. Jinan Iron and Steel Group Shiheng Special Steel Plant, Feicheng 271612 Our company developed hydraulic excavator rotary reducer evaluation 0100 It is a key component of hydraulic excavators. It is basically the same in structure with the rotary reducer of Japan Toshiba Corporation Korea Daewoo Heavy Industry Co., Ltd. It adopts two-stage planetary transmission, input speed is 1500, transmission ratio is 20 output torque. Our company is developing the satirical 5100 rotary reducer. It analyzed and discussed the characteristics of its institutions and components, and solved many technical key questions and achieved successful development.
2 characteristics of the mechanism components and solutions to the problem 2.1 the application of the drum teeth on the planetary gears The key technology of the planetary gears is the use of the tooth direction modification technology, that is, the drum teeth. The main function of the project is to improve the contact accuracy of the tooth direction in the floating planetary mechanism, thereby increasing the bearing capacity of the gear and reducing the noise of the mechanism. This is also the main difference between the same institutions in the country.
Since the gear is heat treated by carburizing and quenching, in order to eliminate the heat treatment deformation and ensure the accuracy of the tooth, we adopt a grinding process. Using the 7131 gear grinding machine, the grinding wheel dressing master device was modified to make the planetary gear processing successful. When the gear is such as a toothed tooth, the machine tool needs to have a special mechanism, so that when the grinding wheel is ground to both ends of the tooth, the grinding wheel can be radially approached to the workpiece, so that the tooth thickness at both ends of the tooth is made thinner. This additional movement is achieved with a cam lever mechanism. 2. When the grinding head reciprocates up and down, the push rod is moved on the cam or the sample plate, and the levers 1 and 2 are pushed according to the shape of the sample curve, and the lever 2 moves the grinding head to make the grinding wheel obtain additional radial movement. The moving distance can be made according to the requirements of the 2.2 hard toothed inner ring gear. The inner ring gear adopts the hardened tooth surface, which improves the bearing capacity of the tooth surface, thus reducing the volume of the mechanism. This is the Japanese and Korean rotary reduction Shandong machinery. The big features of the speed machine. The part is made of 45 steel, the inner tooth surface requires hardness, only 50,58, and the hardened layer depth is 3. The maximum straightness should be 300 reverse electric furnace according to the above conditions. Because we only have 200 stomach intermediate frequency electric furnace, we use segmental surface quenching. In the heat treatment process, according to the deformation law, the amount of deformation is reserved, and the measures for reducing the deformation are taken, so that the ring-shaped processing of the ring gear is successful. The hardness and hardened layer were fully qualified by the Rie Hardness Tester and the Micro Hardness Tester, and the geometrical dimensions were also fully qualified.
The torque of 10000N.M takes into account the elastic deformation after the force, and improves the contact accuracy of the tooth surface. The shaping technology is adopted in the tooth direction, and its shape is similar to the thickening gear. It is very difficult to process. We use the 3180 ordinary gear hobbing machine. , using a unique dimension single-sided hobbing method, successfully processed the output gear of the tooth direction modification.
In the development of the 0100 rotary reducer, we also successfully developed the bearing bush with unique material formula, adopted the liquid ammonia cooling installation process, carried out a large number of materials and heat treatment test, and adopted high-strength engineering plastics.
As a result, the fox 100 slewing reducer was completed at the end of March 2005 after the development in recent months. All parts were qualified by the host manufacturer, and the whole machine no-load test noise was 76.
Edited by Rao Zhengang. The first version of the planetary transmission design. Beijing National Defence Industry Press, 1994 Qin Machine Tool Plant, Seven Workers University, Xi'an Jiaotong University Mechanism Teaching and Research Office grinding working principle writing group. Beijing Machinery Industry Press, Feng Zongqing, Ye Keming, Xin Ning, Li Jun belt. Gear manual booklet. Beijing Mechanical Industry Press, 1990, starting from page 59, the weight range starts from the weight range and the weight range starts from the weight range. 6 Conclusion Through the above analysis and practice, the drawing of the lifting torque curve of the double lifting point crane tower crane should not be drawn. The formula is drawn and should be drawn by algorithm. The lifting torque curve of the lifting point crane tower machine determined by this algorithm is more realistic.
The first section is the commissioning of the tower crane torque limiter. Construction machinery. 19975.
2 weeping section 94621999 tower crane technical conditions. 3 paid Jianxiong. Torque limiter adjustment and system integrated accuracy calculation. Construction Shandong Machinery
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