Tianjin Lianxing Transmission: High quality cycloidal reducer, suspended gear reducer, dedicated reducer for mixing station, feeding belt reducer, mining reducer, enveloping worm gear reducer, hard tooth surface gear reducer, large non-standard reducer.
Summary of advantages, disadvantages, and development trends of various reducers: Discuss the advantages, disadvantages, and development trends of various reducers. A reducer is a power transmission mechanism that uses a speed converter of gears to reduce the rotation of the motor to the desired number of revolutions and obtain a larger torque. In the current mechanisms used to transmit power and motion, the application range of reducers is quite extensive. Its traces can be seen in almost all types of mechanical transmission systems, from ships, cars, locomotives in transportation, heavy machinery used in construction, processing machinery and automated production equipment used in the mechanical industry, to common household appliances, clocks, and so on in daily life. Its application can be seen in the transmission of large power, small loads, and precise angle transmission, and in industrial applications, the application of reducers can be seen, The reducer has functions of reducing speed and increasing torque. Therefore, it is widely used in speed and torque conversion equipment. The main functions of a reducer include: 1) reducing speed while increasing output torque. The torque output ratio is based on the motor output multiplied by the reduction ratio, but it should be noted not to exceed the rated torque of the reducer. 2) Deceleration simultaneously reduces the inertia of the load, which is reduced by the square of the deceleration ratio. Everyone can take a look. Generally, motors have an inertia value. The working principle of a gearbox is generally used for transmission equipment with low speed and high torque. The power of an electric motor, internal combustion engine, or other high-speed operation is reduced by meshing the small number of teeth on the input shaft of the gearbox with the large gear on the output shaft. An ordinary gearbox also has several pairs of gears with the same principle to achieve the ideal deceleration effect. The ratio of the number of teeth of the large and small gears is the transmission ratio. The type of reducer A reducer is a relatively precise mechanical device used to reduce speed and increase torque. It has a wide variety of models, and different types have different uses. There are various types of reducers, which can be divided into gear reducers, worm reducers, and planetary gear reducers according to the transmission type; According to the different transmission stages, it can be divided into single stage and multi-stage reducers; According to the shape of the gears, they can be divided into cylindrical gear reducers, conical gear reducers, and conical cylindrical gear reducers; According to the layout of the transmission, it can be divided into deployable, split, and coaxial reducers. The following is a commonly used classification of reducers: The main feature of worm gear reducers is their reverse self-locking function, which can have a large reduction ratio. The input and output shafts are not on the same axis or plane. But generally, the volume is relatively large, the transmission efficiency is not high, and the accuracy is not high. The harmonic transmission of harmonic reducers utilizes the controllable elastic deformation of flexible components to transmit motion and power. It is small in size and has high accuracy, but its disadvantages are limited service life of flexible wheels, lack of impact resistance, and poor rigidity compared to metal parts. The input speed cannot be too high. The advantages of a planetary reducer are its compact structure, small return clearance, high accuracy, and the use of
③ Diversified types and multiple variant designs. Breaking away from the traditional single base installation method, different types such as hollow shaft suspension type, floating support base, integrated connection between motor and reducer, and multi-directional installation surface have been added to expand the scope of use. The main factors that promote the improvement of the level of reducers are: ① the gradual improvement of theoretical knowledge, which is closer to reality (such as gear strength calculation methods, modification techniques, deformation calculations, optimization design methods, smooth transition of tooth roots, new structures, etc.) By using good materials and generally using various high-quality alloy steel forgings, the quality control level of materials and heat treatment has been improved The structural design is more reasonable. ④ The machining accuracy has been improved to ISO5-6 level. ⑤ Improved bearing quality and lifespan. ⑥ Improve the quality of lubricating oil. Since the 1960s, China has successively formulated standards for a number of universal reducers such as JB1130-70 "Cylindrical Gear Reducers". In addition to self-made and matched use by the main engine factory, a number of specialized production factories for reducers have also been formed. At present, there are hundreds of enterprises producing reducers nationwide, with an annual output of about 250000 universal reducers, which has contributed to the development of mechanical products in China. Most of the reducers in the 1960s were manufactured based on the technology of the Soviet Union from the 1940s to the 1950s. Although they developed later, due to the limited design, technological level, and equipment conditions at that time, their overall level was significantly lower than the international level. Since the reform and opening up, China has introduced a batch of advanced processing equipment and gradually mastered the design and manufacturing technology of various high-speed and low-speed heavy-duty gear devices through the introduction, digestion, and absorption of foreign advanced technology and scientific research. The quality of materials and heat treatment, as well as the machining accuracy of gears, have greatly improved. The manufacturing accuracy of general cylindrical gears can be increased from level 8-9 in JB179-60 to level 6 in GB10095-88, and the manufacturing accuracy of high-speed gears can be stabilized at level 4-5. After some reducers adopt hard tooth surfaces, their volume and mass are significantly reduced, and their load-bearing capacity, service life, and transmission efficiency have been greatly improved, which plays a significant role in energy conservation and improving the overall level of the main engine. The power of the high-speed gear reducer (booster) designed and manufactured by China has reached 42000 kilowatts, and the circumferential speed of the gear has exceeded 150m/s. However, the technical level of most reducers in China is not yet high, and old products cannot be immediately replaced. The transition between new and old products will take a long time. Development trend: Modular systems can be divided into two categories: open and closed. The characteristic of an open system is that a sufficient number and variety of modules are directly or indirectly connected to each other, and the same variety of modules can be repeated without restriction, thus forming an infinite number of combinations; But when the variety and quantity of modules are limited, the number of combinations is also limited. For example, systems such as currency, text, power supply, pipelines, block gauges, disc springs, etc; A suspended transportation device is a relatively complex open system consisting of straight rails, curved rails, forks, underframe, hanger, landing gear, and end plates. By selecting the aforementioned modules appropriately, it can be assembled
The total number is K, the number of identical modules required for each product is Z, the combination number of system modules is C (regardless of order), the arrangement number of system modules is A (considering combinations and distinguishing different arrangement orders), and the comprehensive combination number is P. The layout and connection mode of the module system, interchangeability and compatibility modules have different functions in the product, and their combination relationship with other modules is also different. The number of other modules connected to a module is different, which can be divided into linear connection (single and two-way), plane connection (four-way) and three-dimensional connection; According to different module correlations, it can be divided into: rigid connections - with direct assembly systems, and divided into static and dynamic connections; Flexible connection - a connection with indirect, physically related conditions but no geometric related conditions. The level of 9 module synthesis and the number of available combinations of products are subject to fewer constraints in product grading modular design compared to conventional modular design composed of basic modules, and modern design, manufacturing, and management methods can be fully utilized. In a hierarchical module system, the product and intermediate level modules are composed of their adjacent lower level sub modules, and their structure or performance parameters depend on the various sub modules that make up it. The lower the level of submodules in the product, the greater the impact on the number of components (deformations) of the product. Therefore, when conducting module synthesis in a hierarchical modular system, the lowest level module should start, and gradually integrate to the higher level module until the product is formed. The comprehensive schematic diagrams of hierarchical modular products mostly have a tree like structure, and the length (hierarchy) of each tree branch varies. The theoretical combination number is the product of the number of modules in the same position of each end module, regardless of the level of the end module. When considering factors such as parameter matching (similar parameters in different parts should be consistent) and functional redundancy, the number of available combinations will be greatly reduced. The tail frame of a certain grinding machine has 4 types of center heights and 3 types of Morse centers to choose from in its shell A; The sleeve B and protective cover C have 4 stroke sizes and 3 Morse tips to choose from, and the operating handle D has 2 structures and 4 sizes to choose from; Contact sensor E has 4 travel options to choose from. These five groups of modules have a total of 33 parameters, so the modules in groups A, B, and C each have 4 × 3=12 combinations, with 8 and 4 combinations for D and E respectively; The total number of combinations of tailstock is A=12 × twelve × twelve × eight × 4=55296. Considering that the parameters of the same type should be consistent for different parts and modules, there are 4 types of center heights, 4 types of strokes, 3 types of tips, and 2 types of handle structures. Therefore, the number of available combinations for the tailstock A1=4 × four × three × 2=96 types, only 576 times the theoretical combination number. A basic task in modular design is to first divide the basic modules of the reducer. According to the theory of module division, basic modules should be divided according to their functions. Generally, the basic modules of reducers can be divided into: (1) shell or box module for general gearbox, which is its supporting box. It is a main module of reducers, and it completes the support and sealing of the shaft system and gears. For planetary gearboxes, they are generally referred to as housing modules. (2) According to the determined speed ratio series and
