Design and analysis of gear box for high power transmission presented by mohd amirmeb122 mir monir alam meb205 muzzammil ahmadmeb032 1 under the supervision of prof. It is usual to premachine pinion shafts from the roughing out stage by. Pdf design and analysis of two stage reduction gearbox. With one less stage, and thus fewer components, compact two stage helical bevel gear boxes are smaller, lighter and. These vehicles are designed to sustain any sort of extreme loads that act during off road driving. Import iges file in ansys workbench simulation module. Axle for automobile i am not sure that is twostage. A two stage speed reducer optimization problem induces a number of challenges especially when the design problem involves gear kinematics, geometry and strength. A nondominated sorting genetic algorithm nsgaii was used in 3 in order to solve a multiobjective optimization of a multispeed gearbox. Christianhartmanngerlach, driveconcepts gmbh dresden. Standard 2001d04 or 2101d04 fundamental rating factors and calculation methods for involute spur and helical gear teeth with the permission of the publisher, american gear manufacturers association, 500 montgomery street, suite 350, alexandria, virginia 223141560. Draw the configuration and indicate the number of teeth on each gear in the gear train. Design of spur gear machine design spur gear gear design design of machinemdgtu spur gear design duration. This system makes use of gears with a motor to achieve the desired functionality.
Software to automate preliminary design of gearbox with spur helical and bevel gears was developed. Tutorial for designing and calculation of a multiplestage. The unit to indicate the sizes of spur gears is commonly stated, as specified by iso, to be module. Introduction heading 1 in this project we are going to manufacture a two stage reduction gearbox. Determine allowable force on gear teeth, including the factors necessary due to. One more use of gear reducers is in gear switching in automobiles. The design achieves most of its initial goals except for the weight reduction requirement. The gearbox design presented in this report is a result of considerable amount of experimental. Relationship between the involute elements determination of base tooth thickness from a known thickness and viceversa. This gearbox manufacturing will result into quick availability to the students participating in various international events for which they require similar type of gearbox as well cost. This is an instruction for designing a gearbox model followed by a kinematic calculation of single machine elements using the program mdesign gearbox.
Shigleys mechanical engineering design, eighth edition. Advice on the selection of bearings and the design of bearing arrangements in planetary gear bearing arrangements is available from schaeffler application engineers and the schaeffler engineering service worldwide. The two types of tooth that can be used for both parallel and angled drives are straight or helical. Generally speaking, when two spur gears are in mesh, the gear with more teeth is called the gear and the one with the smaller number of teeth is called the pinion. The calculations for spur gears are also simple and they are used as the basisfor the calculations for other types of gears. An involute gear tooth has a profile that is the involute of a circle, which means that as two gears mesh, they contact at a single point where the involutes meet. Sep 29, 2016 a gearbox that converts a high speed input into a single output it is called a single stage gearbox. Mar 04, 2018 in general two stage gearbox means in which the torque is stepped down or up twice that is using two pairs of gears. A degree of axial thrust is produced which must be catered for in the bearing design. If the mating gear has more teeth than the pinion, that is. The single stage reducer is referred to as a single stage reducer, which can be divided into single stage worm gear reducer and single stage gear reducer as well as single stage rv reducer.
The main disadvantage of a spur gear compared with a helical, is in the tooth engagement process. This type of efficiency ensures that a high proportion of the energy being input is transmitted through the gearbox, rather than being wasted on mechanical losses inside the gearbox. Design of spur gear full design procedure of spur gear. Our project is aimed to carry out design and analysis of two stage spur planetary gearbox2p17. Using these analytical values, modelling of gears on proe catia v5r20 modelling software is. How to specify and apply precision gearboxes with servosystems. In little steps will be illustrated how to design a 3dmodell of a single stage spur gear unit. This is a step by step explanation for designing a 3dmodel of a multiple stage gearbox, the calculation of it and how to document the results. In times of engine downsizing and lightweight design, the dynamic and acoustic behavior of multistage gearboxes is becoming increasingly important. Nov 11, 2017 the complete procedure of design of spur gear is explained in this video step by step in very easy manner. Design a two stage compound spur gear train with an overall ratio of approximately 53. I am unaware of any other book which gives such information and at the same. In this problem the design life of the gear pair did not enter into the solution except to determine whether the gears were to be rated for finite or infinite life. Design is done by doing design calculations analytically according to standard design procedure.
Apr 26, 2017 the gearbox design presented in this report is a result of considerable amount of experimental iterations based on stress analysis knowledge and the teams ability to manipulate the provided data into a feasible wellperforming solution. The design of the gearbox for the specified requirement is done, considering all the design specifications and objectives. Design of two stage planetary gear train for high reduction ratio prabhakar vitthal pawar1, p. In recent years, it is usual to set the pressure angle to 20. A second look at gearbox efficiencies machine design. Pdf design and analysis of two stage reduction gearbox for all. Single speed, double reduction gearbox vex robotics. Hoe to use psg design databook effectively is also covered in this video. For each gear stage, the direction of rotation between the drive shaft and the output shaft is reversed.
Design optimization of a two stage gearbox by using kisssoft was accomplished. The motor i have found has a shaft diameter of 48mm the design i proposed is a two stage reduction gear box using spur gears. Calculat ion of a two stage gearbox this tutorial shows the usage of mesys shaft calculation with systems of parallel shafts. A basic rule that designers use for spur gears is a 10%.
Gear generator is a tool for creating involute spur gears and download them in svg format. The company has planned to develop a series of singlereduction spur gearbox reducers. Keywordsreduction gearbox, spur gears, designing, analysis. Pdf design and analysis of two stage reduction gearbox for. Optimal design of twostage speed reducer using twophase. A pair of mating spur gears of specified geometry, material and manufacturing quality is given. Stainless steel 1 stage helical gearbox, either as stand alone or as a prime reducer for worm wheel gearboxes. Gears can be animated with various speed to demonstrate working mechanism. In this paper, an optimum design of a two stage spur gear system is performed. Understand and determine necessary surface hardness of gears to minimize or prevent surface wear. Previous question next question get more help from chegg. Uses 2 stage helical gear the design is simple and not complicated when compared with the existing gear box.
This point moves along the tooth surfaces as the gears rotate, and the line of force known as the line of action is tangent to the two base circles. Design of spur gear using psg design data book complete. Tutorial for gear design and calculation with mdesign gearbox dipl. Aug 21, 20 i am required to design all aspects of the gearbox including that strength of material is ensured. The difference between single stage and two stage gearbox. Design and optimization of 2stage reduction gearbox. Design and analysis of gear box using spur gear and eliminating the differential unit rahi jain and pratik goyal medicaps institute of technology and management, indore, india abstract a gear is a rotating machine part having a cut tooth, which meshes with another toothed part in order to transmit torque. Pdf procedure for optimum design of a twostage spur gear. Two stage helical bevel gearing offers significant benefits to both oems and endusers by lowering costs at both initial purchase and over the lifetime of equipment. Analysis of dynamic excitation behavior of a twostage spur gearbox. This cutaway image of a two stage planetary gearbox shows.
This design permits both torsional and radial movement and to a lesser degree angular movement in the diametrical plane. The optimization is based on a multicriterion technique. While it is certainly true that the setting or laying out of a. Practical optimal design on two stage spur gears train using. Vij ay 4 1, 2,3,4 department of automobile engineering, vistas. Reduces the cost of speed reducing gear box considerably. What are the applications of twostage gear boxes type. First of all, we have prepared our assembly gearbox in the creo parametric 2. Vij ay 4 1,2,3,4 department of automobile engineering, vistas, chennai. But if we use this term in case of an automobile gearbox, then the meaning then a lot more comes into play.
Understanding, selecting and applying planetary gearheads. Design optimization of a two stage gearbox by using kisssoft was accomplished by readily supplying the design parameters requested. Dec 31, 2017 i am sure nobody know every application. A spur gear and a typical two stage spur gear train are shown in figure 1 and figure.
Calculation of a two stage gearbox this tutorial shows the usage of mesys shaft calculation with systems of parallel shafts. Design and analysis of two stage reduction gearbox for all terrain veh. The smallest number of teeth on a spur pinion and gear, onetoone gear ratio, which can exist without interference is np. Figure 1 design of gearbox apply material for spur gear 15nicr1mo15 and scm415. In general two stage gearbox means in which the torque is stepped down or up twice that is using two pairs of gears. The task for each team working on this project was to design a singlereduction spur gearbox which includes a housing, ball bearings, spur gears, mechanical keys and shafts to meet specifications given for each team.
Spur gear design and selection objectives apply principles learned in chapter 11 to actual design and selection of spur gear systems. Spur gear design as an exercise in gear selection, a stepbystep procedure will be demonstrated on how to design a gearset pinion and gear for a gearbox that is to be mass produced for a general industrial application. Tutorial for gear design and calculation with mdesign gearbox. A gear can be defined as a toothed wheel which, when meshed with another toothed wheel with similar configuration, will transmit rotation from one shaft to another. Gearbox efficiencies in a spur gearbox at a 16mm diameter vary from about 87% at a gear ratio of 6. The difference between single stage and two stage gearbox, single stage gearbox, three stage gearbox, two stage gearbox, 2 stage gearbox. An allterrain vehicle is an off road vehicle that has the ability to drive on any terrain without any difficulty. Pdf in this paper, an optimum design of a twostage spur gear system is performed. This will use 2 pairs of 20 teeth gears and 100 teeth gears on parallel shafts. Introduction engineering design is an iterative process that is started with a poorly defined problem refined and then developed a model. The standard spur gear is a nonprofileshifted spur gear. Single speed, double reduction gearbox the same old two stage gearboxes teams have come to know and love. Calculate forces on teeth of spur gears, including impact forces associated with velocity and clearances.
Axle for automobile i am not sure that is two stage it can be one stage 4. Calculate the stage ratio for equal gear ratio of compound gearset by using the following expression. Here, the stage ratio for two stage compound spur gear train is, the overall approximate ratio of two stage compound spur gear train is and the number of stages in a compound spur gear train is. Spur gear engineering information 306311 section contents. In this paper we have seen the finite element method for analysis of spur gear in two stage planetary gearbox. Design and optimization of 2stage reduction gearbox ijedr. With one less stage, and thus fewer components, compact two stage helical bevel gearboxes are smaller, lighter and. Contents preface acknowledgements introduction 1 crown wheel and pinion torque at rear axles vehicle performance torque axle torque from maximum engine torque through the lowest axle torque from wheel slip drive pinion torque stress determination and scoring resistance bending stress contact stress gear ratios 2 internal running gear. Lightweight design for planetary gear transmissions.
Also the case study to determine the reduction ratio of two stage gear box is. Normally, spur gears design is a very intricate task, as it. Design of gears according to agma 2001d04 the intent of the agma strength rating formula is to determine the load which can be. If you connect several gear pairs one after another, this is known as a multi stage gearbox. The number of teeth for spur gears is given by where k 1f fll1 for fulld tht th08f tbt th d ldepth teeth, 0. Boston gear s spur gears, which are designed to transmit motion and power between parallel shafts, are the most economical gears in the power transmission industry. Gear design national broach and machine division,of lear siegler, inc. With single spur gears, a pair of gears forms a gear stage. The gearset shall transmit 100 horsepower at a pinion speed of revolutions per minute.
The optimization is based on a multicriterion technique consisting of a minmax method combined with a direct search. A gearbox that converts a high speed input into a number of different speed output it is called a multispeed gear box. The optimization is based on a multicriterion technique consisting of. The face width changed from stage 1 to stage 2 from 24mm to 45mm the geometry factor j becomes 0. Cylindrical spur gears with standard profile cylindrical spur gears with corrected profile without centre distance variation with centre distance variation. In the software kisssoft we apply the problem with the. Single stage planetary gearheads provide possible gear ratios ranging from 3. What are the applications of twostage gear boxes type spur. Planetary gear bearing arrangements in industrial gearboxes. Design and draft 2 stage gearbox with given dimensions and tolerances 1 stage helical gears 2 stage spur gears after dimensions are given required to complete design and draft in 24 hrs. Formulas for gear calculation external gears contents. Multi speed gear box has more than two gears and shafts.
On larger designs where plain bearings are fitted a thrust block arrangement must be fitted. Files 2 design of 2 stage helical hoist gear box for eot crane design of 2 stage helical hoist gear box for eot. Design and analysis of two stage redu ction gearbox for all terrain veh icles l. Another advantage of the planetary gearbox arrangement is load distribution. Angular contact or tapered roller bearings are employed. Please start with the tutorial for shaft calculation to see how to introduce geometry and supports for single shafts. This system demonstrates the single stage gear reducer assembly using motorize shafts and gear mechanisms in a gearbox frame. Design of two stage speed reducer the overall reduction ratio obtained in previous step is split into two stages using the formula. In addition, there are a large number of special solutions to fulfil a very wide range of requirements. The efficiency of the spur gear can be as high as 98% and capable of practical speed ratios of 10. Pdf procedure for optimum design of a twostage spur.
How to design and install bevel gears for optimum performance. This is a step by step explanation for designing a 3dmodel of a multiplestage gearbox, the calculation of it and how to document the results. Lessons learned stephen marsh introduction bevel gears must be assembled in a specific way to ensure smooth running and optimum load distribution between gears. Vij ay 4 1, 2,3,4 department of automobile engineering, vistas, chennai. Design and draft 2 stage gearbox with given dimensions and. This section introduces calculation methods of standard spur gears, profileshifted spur gears, and linear racks. Design actual gear systems, including specifying materials, manufacturing accuracy, and other factors necessary for complete spur gear design. Gearbox design contreras, marisol gregorio, kevin obdulio sosa, carlos alberto florida international university department of. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the inputoutput ratio and rotation speed. A basic rule that designers use for spur gears is a. Depending upon the type and accuracy of motion desired.
376 434 386 1521 244 1404 669 1385 277 874 1232 1287 280 1302 1260 207 404 312 70 58 1468 1051 431 1530 449 1420 949 700 375 1351 1034 554