Electric traction shearer walking part design

Electric traction shearer 2019 - walking part design 08 - 28 hai-ming guo xiao-dong zheng abstract: this article mainly introduced the walk of shell and sliding boots processing and mechanism design, and gear material selection and structure design. Key words: electric haulage shearer; Walk department; Material selection and structure design in the '50 s, China began to application of coal mining machinery production chain cutter was copied the Soviet union. Coal winning machine technology has developed rapidly in our country, to the early 70 s has entered the coal -mining machine in our country can design and production, is suitable for the coal seam occurrence condition of screw drum of shearer. 80 generation of ac traction shearer in the latter period. Electric traction shearer main features: overall transmission of coal winning machine adopts horizontal layout, the number of motor drive independently of each component parts between the longitudinal, there is no direct power transmission, completely cancel spiral umbrella gear transmission and transmission links through shaft structure such as vertical arrangement, greatly improve the efficiency of the mechanical transmission, reduce the body heat level. Combined with left and right traction of walking, left, right, left, right, hydraulic system, electric control system, cutting department form a complete set of spray cooling system, support group sliding boots, drum and towing frame, etc. Walk department is an important part of electrical traction shearer. Walking by walking and walking device drivers. Walking mechanism by shell, driving wheel, wheel, spline shaft, spindle and sliding boots of main components. Walk to the left and right symmetry structure, in addition to the shell, the rest of the parts are interchangeable. Part interchangeability greatly improve the efficiency of the coal winning machine. This in the history of the development of electric haulage shearer is a technological leap. Electric traction shearer running gear drive device USES electric traction, compared with previous drawing method has many advantages: higher safety coefficient; Rate is also higher; Traction mechanism is simple, compact, light weight. Walking mechanism of main parts design: a walk, shell and shell processing and walking mechanism design of sliding boots and sliding boots using whole casting process, should not have crack, cold insulation, to have not been fusion, blow hole, shrinkage porosity, shrinkage cavity, sand inclusion, the phenomenon such as slag. Casting process manufacturing cycle is shorter welding and other technology, manufacturing difficulty, manufacturing quality assurance more easily. Mass production manufacturing cost is lower than other process method. So for walking tank shell and sliding boots using the casting process. Casting technology is widely used in the actual production process. Electric traction shearer working conditions, the machine vibration is larger, in walking tank shell and the internal parts and traction link is not stable. Walking in the box on the shell application stability and hydraulic nut. Nail is walking to a stronger link internal shell and shell parts, hydraulic nut shell walking better links with traction. The structure of the improvement in the process of electric haulage shearer walk walk institutions shell with traction link easily loose problem to give a good solution. Nail and preliminary application in the electric traction coal winning machine, hydraulic nut design of electric traction coal to walk through the industrial experiment and application in practice, the reaction is good. Walk department structure as shown in figure 1:2, the gear material selection and structure design of the main dimensions of the gear transmission according to the following method to determine: ( 1) According to the specific working conditions, structure, installation and other requirement. According to the tooth surface contact strength calculation formula to determine the center distance of a or pinion diameter d, calculated and determined according to the bending strength modulus m. After preliminary determine the main dimensions, should carry on the intensity, and appropriate adjustment according to the results of the check calculation of the initial size. Walking wheel and driving wheel material are shown in table 1. Walking wheel driving wheel is shown in figure 2, figure 3. Walking mechanism of walking wheel and driving wheel is more important, the demand is fine, the above method of gear main dimensions determined and adjusted to obtain the final size, preliminarily for formula and calculation process here is in a narrative. Application of Creo Parametric software on gear map 3 d. Walk round the damage, basic it is by the lack of oil inside first, leading to loss of lubrication effect, increase friction between the bearing components, high temperature burning bearing components. Or end cover outside because there was no oil lubrication friction force is too large and outside channeling, makes walking wheel apart. So solving the problem of walking wheel lubrication has become top priority. Wheel lubrication oil hole on the shaft by walking. Three, shaft material selection and structure design of drive shaft in spline shaft and walking according to the design of past successful cases, in view of the previous drive is not convenient to the problem of the erection and dismantling of spline shaft, the design on both sides of drive shaft end of spline shaft drive C M16 center hole, the design and improve the efficiency of the installation workers to install, save the working hours. Walking axis of the oil hole on the basis of the original enlarge the inlet area of oil duct, neither the strength of the shaft damage walking, walking axis and can guarantee even up move can make the injection into the oil into walking round smoothly inside, make its walking wheel has plenty of oil to change because of a series of problems caused by lack of oil. This is a significant characteristic of walking shaft design. Walk of shaft materials used are shown in table 2. Epilogue is the mobile mechanism of shearer coal winning machine walking part, at the same time to play the role of a driver of traction. Walk of reasonable structure design as well has a positive meaning. References [ 1] As a big first. Mechanical design manual. Chemical industry press ( The fifth edition) ( M] 。 Beijing: chemical industry press, 2007 ( 11) 。 ( 2] Zhi-ming gao, shi-hong zhang. The modern design method of coal winning machine and thinking [ J] 。 Coal mine electrical and mechanical, 2008 ( 05) 。 Source: 'China's new technology new product' 第04 period in 2015