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1=SimSun Abstract proposes a new type of coaxial double-ring reducer, based on its kinematics analysis and its transmission performance and vibration test. The test results show that the transmission efficiency of the reducer reaches 94, and the vibration reaches the country. Level 6 level.
Introducing a new type of two-stage coaxial double-ring reducer, which is composed of a class of ordinary cylindrical gear transmission and a double-ring mechanism, which not only retains the bearing capacity of the ring reducer but also is suitable for high speed.
1Basic structure and transmission mechanism of double-ring reducer 1.1 Basic structure Two-stage coaxial double-ring reducer structure 1. The reducer is a kind of speed reducer composed of graded ordinary gear transmission and level-shifted action shaft with less tooth difference drive. It is constituted by an intermeshing external gear 14 which is mounted on two input eccentric crankshafts 3 which are parallel to each other and each have two eccentric journals, and the two transmission internal tooth plates 5 are mounted at a high speed through the bearing 6. The eccentric crankshaft 3 is input, and the shaft 8 of the external gear 7 is a low speed shaft whose axis is parallel to the axis of the input eccentric crankshaft 3, and the low speed shaft 8 is supported on the casing 10 through the bearing 9, the two internal gear plates 5 and the external gear 7 meshing, the meshing instantaneous phase difference is 180. Power is input from the shaft 2, and the power is shunted by the stage gear 14 to the two-input eccentric crankshaft 3 in the small-tooth-tooth drive, so that the double crank input shaft is synchronized, and the double input is utilized. To overcome the dead point of the two-phase parallel double crank mechanism formed by the input eccentric crankshaft 3 and the inner tooth plate 5 of the mountain 180, the inner tooth plate 5 meshes with the output external gear 7, and the meshing phase is 180, thereby realizing the power merge output. The two eccentric crankshafts of the input eccentric crankshafts 3 which are 180 into each other are processed by the root crankshaft in the machining process, and are further divided to ensure the accuracy of the eccentricity of the two eccentric crankshafts. Because the eccentric sleeve is removed, the fretting wear is overcome, and the machining process is simple, and the machining accuracy is easy to ensure.
The characteristic of the double-ring reducer is a step-down device consisting of a class of ordinary gear transmission and a stepped parallel shaft with less tooth difference transmission. The characteristic is that the power is shunted to the parallel shaft by the ordinary gear transmission. 1. Gear 2. Input shaft 3. Input eccentric crankshaft 4 gear 5. Inner tooth plate ring plate 6. Bearing 7. External gear 8. Output bottom speed shaft 9. Bearing 10. Two-input eccentric crankshaft in the differential drive, use double input to overcome double The dead point of the parallel double crank mechanism realizes the power confluence output. 2 Two eccentric crankshafts are processed by the root crankshaft in the machining process, and then divided into two to ensure the accuracy of the eccentricity of the two eccentric crankshafts. The eccentric sleeve was removed and the fretting wear was overcome. 3 The output shaft adopts the cantilever mounting method, and the input shaft is supported on the output shaft through the bearing, which makes the structure more compact and reduces the weight. The large gear of the 4-stage ordinary gear transmission acts as a stirring oil to reduce the liquid level of the lubricating oil of the reducer. 5 coaxial input.
1.2 Kinematics Analysis The coaxial double-ring reducer is a new type of internal gear planetary transmission formed on the basis of a small-tooth-toothed planetary transmission. It is to change the central internal gear of a small-tooth-toothed planetary transmission into a planetary gear. The new planetary gear formed by the outer gear of the planet is changed into the center wheel. 2 No, the point is the instantaneous meshing node of the internal and external gears of the planetary transmission, so the speed of the internal and external gears at the node is 1=7, 2, assuming that the speed is positive in the middle to the right direction. The external gear is used for the rotation of the center of the circle, so there is 771=, the mountain is translated as the internal gear, so the heart = 7, 2 National Natural Science Foundation of China 50005025 respectively, the external gear angular velocity, the number of pitch circle radius, the radius of the circle, the inner tooth Planet wheel angular velocity gear pitch circle radius The index circle radius is the center distance between the inner gear and the outer gear.
For the grade drive, it is the external mesh drive of the ordinary cylindrical gear, and the transmission ratio is the heart.
It can be seen from the type of punching that the input shaft and the output shaft of the coaxial double-ring reducer drive section have opposite rotation directions and the transmission ratio is directly affected by the difference between the internal and external teeth. The total gear ratio 1 of the two-stage coaxial double-ring reducer for 1 is. 1=. After the heart test, release the originally added lubricant and clean the bottom of the cabinet, then re-inject the lubricant to prepare for the following performance test.
2.2 Efficiency of coaxial double-ring reducer The efficiency test of coaxial double-ring reducer drive is completed by step-by-step loading. Under rated speed and torque, the high-speed shaft gear will reach 36 after each tooth stress cycle. The speed is divided into 750 to 0001,500, and the output torque is 60,810 out of the rated output torque. Under the two conditions of constant speed variable torque and constant torque variable speed, the transmission efficiency test is carried out, and the experimental results are not.
4 fixed torque test cut speed test 2 experimental research based on the previous design and manufacturing of the coaxial double-ring reducer prototype power 5.5, input speed 1440 on the gearbox test bench of the State Key Laboratory of Mechanical Transmission of Chongqing University An increaser with a gear ratio of 3.15 is added between the end torque speed sensors. The specific model of each instrument is DC motor type 2 winter 132 torque speed sensor Xiangyi power test instrument brother type 1 input power is 1 tear; Shanghai first electric direct current = torque speed transmission double loop reducer transmission performance test bench structure The type 2 output magnetic powder brake model produced by the factory. 22 speed increase machine 20101 series, rated torque 200.1 transmission ratio 1 can signal acquisition and processing analyzer group includes 0 people 3 large-capacity data automatic acquisition and signal processing system.
2.1 Running-in experiments of coaxial double-ring reducer The cabinet and parts of the coaxial double-ring reducer are assembled according to the design. Before assembling the box, turn the input shaft half-coupling by hand to check whether the rotation is flexible. Whether the bearing is coaxial. If the rotation is stuck, first consider whether the external gear assembly is correct. After assembly, the no-load running 41 forward and reverse respectively run 2. Then load 2 off run 2 load 5 off run 2 final load 10 off run 2, run-in experiment results show that from the curve efficiency It can be seen that the transmission efficiency of the prototype increases with the increase of the output torque and decreases as the input speed increases. Under the rated torque, the total efficiency of the transmission decreases slowly with the increase of the input speed. The transmission efficiency of the prototype reaches its design requirements. Under the rated speed and rated torque, the highest transmission efficiency of the original model can be measured up to 9.
2.3 Coaxial double-ring reducer vibration test Because the double-ring reducer adopts the bearing with small radial clearance and the relative motion between the bearing and the box is also supported by the rolling bearing, the box vibration test method is used for testing. Wide dynamic range and frequency range = tune. The signal that selects the working state of the machine reflects the direction of the sensitive part as the measuring point. A vibration measuring point is arranged on the surface of the lateral eccentric crankshaft of the box at the flat top of the upper part of the box and the bearing seat of the output shaft, and the measuring point arrangement of the speed reducer is not 5 The sensor 12 is disposed at the bearing housing of the output shaft to measure the vibration of the output shaft bearing housing surface in the vertical direction and in the lateral direction. Sensors 3 and 4 are arranged on the faces of the crankshaft and the output bearing housing to measure the vibration of the crankshaft bearing housing in the vertical and lateral directions.
The sensor 5 is vertically arranged at the flat top of the box body, and the vibration sensor 6 in the vertical direction of the measuring box is arranged laterally on the upper side of the box body, and the test box test condition is performed according to the constant torque variable speed, and the torque is divided into the side of the idler body. Lateral vibration.
Kinematics and dynamics analysis of a new double-ring reducer Liu Jinghao Li Runfang 1 Huang Xia 1 Sun Yueting 2 The force model of the ring reducer system, and the key components of the reducer, such as the arm shaft bearing arm shaft support, According to the force analysis, the force characteristic curve of the arm bearing and the arm shaft support is obtained. It provides a theoretical basis for the design and research of this type of ring reducer. Key words new double-ring reducer kinematics dynamic balance 1 basic structure and transmission principle patenter called the basic structure of the improved double-ring reducer such as a double crank drive shaft 2 two double crank follower pin 3 two internal teeth The end face of the ring plate is connected to the concentric outer ring. 4 The outer end of the outer gear shaft 5 is connected to the concentric inner ring. The double eccentric drive shaft and the driven pin have an eccentricity equal to the difference between the outer ring inner ring and the inner ring outer circle radius, and the inner 1500 rmn is tested. When the torque is 1000N, m, the speed and the effective value of each measuring point are as follows.
3 Conclusion Through the structure and kinematics analysis, the ring reducer not only has a large transmission ratio, but also has a compact and simple structure. The root eccentric crankshaft machining is used to divide the process to ensure the accuracy of the eccentricity of the crankshaft. The speed at which the outer ring contacts are installed is the same. The inner ring is purely rolled in the outer ring hole, mainly for positioning, and can withstand the balance of various forces acting on the gear shaft of the two inner ring plates, and plays the role of supporting the ring plate. The overall device transmission is input by the double crank drive shaft 2, and the two internal ring plates are driven by the eccentricity on the double crank drive shaft 2, and the internal ring plate 1 and the external gear shaft 5 are meshed and transmitted to output power. 2 motion analysis 2.1 transmission ratio double crank crankshaft input shaft speed, the two internal ring plate for the planetary gear for translation, the rotation speed is zero, the gear shaft output speed is 〃 2. the number of external gear teeth, the number of internal gear ring plate 22. The gear ratio of the device is 2.2. The dead position is the same as that of the ordinary double-ring reducer. The improved double-ring reducer improves the motion uncertainty at the dead point. This is the simplification of the ordinary double-ring reducer mechanism, which is equivalent to two phase differences of 180 precision. The eccentric sleeve was removed and the fretting wear was overcome.
The efficiency can reach 9 ships at rated power. The vibration reached the national level 6.
1 Xin Shaojie, Li Huamin. Experimental study on vibration characteristics of two-stage ring reducer. Petroleum Machinery, 20 called 102 Modern Mechanical Transmission Manual Editorial Board. Modern mechanical transmission manual. Beijing Machinery Industry Press, 1995 3 Liang Zhaolan, Wang Naixin. Theoretical analysis of a double-ring dual-axis input reducer. Agricultural students, mainly engaged in computer-aided design and vibration control.
Zhu Caichao, State Key Laboratory of Mechanical Transmission, Chongqing University. professor. Dr. Tutor, engaged in transmission system design analysis and vibration noise control.
Received date: 20040419 1. Internal tooth ring plate 2. Double crank drive shaft arm 3. Double crank follower 4. Concentric outer ring 5. External gear shaft 6. Concentric inner ring 7. Carcass
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