Synergistic effects of covalent crosslinking and hydrophobic association on enhancing thermal and salt resistance of polymeric filtrate reducer
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The reducer plays very important role in the oxide puller.Harmonious gear reducer is a novel reducer,characterized by high transmission accuracy,large loading capacity,simple structure,and big rate ratio.The type of XJ-99 harmonious gear reducer is developed to meet high precise requirement of oxide puller.In the paper,the operating principle and design of the harmonious gear reducer is interpreted in details.The result shows the harmonious gear reducer has the rotation precision of 0.01 mm and the end surface jumpiness of 0.02 mm,which is better than the same one.
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In this paper, vibration properties of main parts of a RV reducer are investigated by modal analysis and theoretical calculation.Their natural frequency, vibration mode, and meshing frequency are obtained. This paper provides guidance for RV reducer design.
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An essential mechanical element in an industrial machine is a reducer, which transfers the rotation of an electrical motor or engine to another part with amplified torque. Some reducers, such as planetary reduction gears, a harmonic reducer, or a cycloid reducer, have been applied in various industries. Given the increase of demand for reducers with high precision, compact size, and high load capacity for use in industrial robots, the cycloid reducer has stood out. The cycloid reducer, compared with planetary reduction gears, has some merits, which include a larger reduction gear ratio at only one stage, higher durability, improved efficiency, and a larger torque because of its high tooth-contact ratio despite its being small. This paper presents a design technique for a cycloid reducer intended, because of those merits, for use in remote weapons systems of armed vehicles. In order to verify the performance of the cycloid reducer, we carried out experiments and analyzed the results systematically.
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For the problem that the center bearing of the planetary reducer is subjected to excessive force, a stress analysis was performed on a center bearing with a planetary gear mounted on a NN type reducer, and it was found that there was a large relationship between the bearing force and the axial distance between the bearings. Based on this, a new type of coplanar dual-mesh transmission with less teeth difference is proposed. The transmission principle of this type of transmission is discussed, and a new type of gear reducer with less teeth is selected. This reducer reduces bearing stress and avoids the problem of excessive axial spacing. Using solidworks kinematics simulation, it is verified that the reducer output is stable.
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As a precision gear reducer, the RV reducer has a low-transmission backlash (very high assembly accuracy). Therefore, the selective assembly method is the only assembly method which can guarantee the assembly precision of the RV reducer. However, the RV reducer has a complex structure; it consists of a high number of parts whose machining tolerance cannot be very low. Furthermore, there are numerous parts, the tolerances of which influence the RV reducer transmission backlash. Therefore, it is difficult to achieve high assembly accuracy by using the traditional selective assembly method. In this paper, a method of selective assembly is proposed to make the backlash of the RV reducer meet the requirements through the analysis of the characteristics of the RV reducer structure, the processing and assembly process of the parts, and the influence of manufacturing errors on the backlash. Then, a mathematical model was established for the RV reducer assembly issue. And a matching algorithm based on a genetic algorithm was developed. Finally, the algorithm was applied to the selective assembly of the RV reducer for verifying the feasibility and validity of the proposed matching method.
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The three ring reducer is a kind of gear drive developed in the past decade. Adopting the new conception of parallel and movable axis of multiple mechanisms, this kind of gear drive has many characteristics such as large transmission ratio, high efficiency and so on. As the three ring reducer has been invented only for ten years, up to date the design of the gear drive is only made with analogue method, no design theory can be followed, there exist serious vibration and noise in transmission, which limit its wide application in industry. In this paper, the transmission principle of SHQ50 reducer is studied, the surface noise distribution of the reducer, transmission ratio 49.5 , is measured and analyzed by means of sound intensity method. The 3D distribution maps of noise on top of reducer, input side and output side of reducer, and left side and right side of reducer are drawn. With the sound intensity frequency maps of each measuring point, the sources of giving out noise are analyzed. The reducer of low vibration and noise can be designed rightly according to the analysis.
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At first we designed the whole transmission device of belt type transports and the specific structure of reducer,and then built the 3-D models of parts of reducer using Pro/E.We made the virtual assembly of reducer,and finished the 3-D model of the whole reducer.This is the basis of Computer aided engineering and Computer aided manufacturing.
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