Experimental evaluation of a scotchyoke compressor. A rotary actuator may be defined as a mechanism that converts linear force into quarterturn torque and is suitable for most valves but is most effective on those of larger sizes. Unlike a conventional scotch yoke mechanism whose crank pin slides relative to the yoke. What is the difference between slider crank mechanism with. Oct 06, 2017 hello everyone lets start with slider crank mechanism basically it is used to convert rotary motion to reciprocating motion and vice versa. Part a of the case consists of an account of the first and second designs. This paper proposes to balance the input torque of scotch yoke mechanisms without any auxiliary linkage just by adding linear springs to the output slider. Design calculations force required to crush the plastic bottle. As the discpin rotates, the shaftoblong moves left and right in a sinusoidal motion. Until recently, scotch yoke mechanisms have been utilized only in compressors of relatively small capacity.
Scotch yoke mechanism animation with explanation youtube. It is a inversion of single slider chain which consist of a revolute pairs between connecting rod, crank. Mechanisms, linkage geometry, and calculations the mechanisms and linkages discussed in this chapter have many applications for the product designer, tool engineer, and others involved in the design and manufacture of machinery, tooling, and mechanical devices and assemblies used in the industrial context. Design of scotch yoke mechanisms with improved driving dynamics. Scotch yoke mechanism animation, advantages and application what is scotch yoke mechanism. Fabrication of dual side shaper machine using scotch yoke. Until recently, scotchyoke mechanisms have been utilized only in compressors of relatively small capacity. Pdf scotchyoke mechanism for a syringe pump a case study. The piston or other reciprocating part is directly coupled to a sliding yoke with a slot that. Fourbar mechanism 2 2 sin cos t t a a a a y x obtain coordinates of point a. Scotch yoke the wheel revolves at radianssec and the pin forces the yoke to move up and down. Double slider crank chain is a fourbar kinematic chain having 2 sliding pairs and 2 turning pairs such that two pairs of the same kind are adjacent.
The piston or other reciprocating part is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part. Evaluation of a model for the evolution of wear in a scotch yoke mechanism w. Mechanisms, linkage geometry, and calculations the mechanisms and linkages discussed in this chapter have many applications for the product designer, tool engineer, and others involved in the design and manufacture of machinery, tooling, and mechanical devices and assemblies used in the. A shaper is a machine used for shaping metal removal operation on the work piece. Vijaykumar 1assistant proffessor, department of mechanical engineering gnanamani college of technology, namakkal tamilnadu, india. The design of small scale embedded systems pdf mines in an otterbox and has a few. Pdf input torque balancing through addition of an auxiliary mechanism is a wellknown way to improve the dynamic behavior of mechanisms. For the application discussed herein, a scotchyoke mechanism has been employed in a line. This demonstration compares the sliding joint kinematicsthe displacements velocities and accelerationsproduced by the two mechanisms as functions of the common input crank angle.
Pdf design of scotch yoke mechanisms with improved. Design calculations velocity of water in flow pipe. However, the input torque of the scotch yoke mechanism is variable and can be balanced. The scotch yoke is also known as slotted link mechanism.
Scotch yoke actuator torque output mechanical engineering. Double acting water pumping works under by the scotch yoke mechanism. The performance characteristics and a design sensitivity analysis of the bearing are. This mechanism is most commonly used in control valve actuators in high pressure oil and gas pipelines. Scotch yoke mechanism is obtained when one of the sliding links of a double slidercrank chain is fixed. In the conceptual model of design and fabrication of power hacksaw and shaper using scotch yoke mechanism we are giving supply to the main shaft as we can see that the scotch yoke mechanism is directly fabricated to the main shaft and have same angular velocity as that of mainshaft when the a. Scotch yoke is a rotary to linear conversion mechanism.
Input torque balancing through addition of an auxiliary mechanism is a well known way to improve the dynamic behavior of mechanisms. The design is done so that knowledge of designing, mechanism and forces analysis are increased. Mechanisms, linkage geometry, and calculations machines. In general this linear motion can take place in various forms depending on the shape of the slot, but mostly. The scotch yoke mechanism is most commonly used in control valve actuators in highpressure oil and gas pipelines, as well as. Comparing simple crankslider and scotch yoke mechanisms. Pdf designing and fabrication of double acting hacksaw.
Analysis of drive shaft speed variations in a scotch yoke. Design and fabrication of hacksaw machine using scotch yoke. Design and fabrication of power hacksaw and shaper using. Scotch yoke mechanism mechanisms by gagan bansal kinematics of machines. It is a simple mechanism, the rotary motion of pin convert into linear motion. The mechanism in the link i posted would have a variable torque, and i think is a more common mechanism for actuators than the one in the animation you posted. Novel mechanical mechanisms for the development of.
The scotch yoke also known as slotted link mechanism is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion, or vice versa. It makes use of a slotted slider based system to convert circular motion into linear motion and vice versa. Scotch yoke mechanism diagram working principle of scotch yoke mechanism. Read the second part of my post, and the linked example of a scotch yoke mechanism, but note the difference in where the slide is located. This paper describes about dual side shaper machine using a scotch yoke mechanism which can be used in industries for cutting process. The advantage of scotch yoke mechanism over the slider crank mechanism is that it has lesser moving parts and smoother operation.
Scotch yoke mechanism the scotch yoke also known as slotted link mechanism is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion or vice versa. Journal of tribology technical note this section contains shorter technical papers. Design of scotch yoke mechanisms with improved driving. The rolling scotch yoke mechanism rsym, a variation of the scotch yoke mechanism, is developed in this work. The pin p slides in the slot and the yoke oscillates up and. Working principle it works on the principle of scotch yoke mechanism. The scotch yoke is a mechanism for converting the linear motion of a slider into rotational motion of. The slotted link mechanism is used for converting the linear motion of a slider into rotational. Scotch yoke mechanism design equations and calculator.
Design of a scotch yoke mechanism internet archive. The piston andor springs directly couple to a rotating yoke with a slot that engages the sliding blocks. To design a direct drive shaker by using scotch yoke mechanism. The scotch yoke mechanism convert the rotary motion into the reciprocating motion 2. Design of whitworth quick return mechanism using noncircular gears 61 the purpose of this design is to improve the function of output velocity of the scotchyoke mechanism coupled with gears with the following conditions. When the piston or reciprocating part to directly coupled together for the sliding of yoke including a. Input torque balancing through addition of an auxiliary mechanism is a wellknown way to improve the dynamic behavior of mechanisms. The reciprocating part is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part. Design and fabrication of hacksaw machine using scotch. Two analyses are presented for determining the drive shaft speed variations in a scotch yoke mechanism. The first analysis determines the speed variations when the mechanism is rigidly connected to a motor having a quadratic speed versus torque characteristic. Hello everyone lets start with slider crank mechanism basically it is used to convert rotary motion to reciprocating motion and vice versa.
Evaluation of a model for the evolution of wear in a scotchyoke mechanism w. Although there is a strong similarity between the wheel and the pulley, the wheel has been used for transportation since before 3000 bc while the development of the pulley remained. The scotch yoke mechanism, mye, designed by edibon, is an example of slidercrank mechanism. Shadab husain, mohammad shadab sheikh presents paper on can crusher machine using scotch yoke mechanism.
Vigen arakelian, jeanpaul le baron, and manuk mkrtchyan. Pdf syringe pump is mainly used in microfluidics, where precise flow. The scotch yoke mechanism is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion, or vice versa. Scotch yoke mechanism the scotch yoke mechanism also known as slotted link mechanism is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion, or vice versa. Experimental evaluation of a scotchyoke compressor mechanism. Pdf designing and fabrication of double acting hacksaw machine. Design, manufacturing, commercialization and aftersales service qjlqhhulqjdqg7hfkqlfdo 7hdfklqjtxlsphqw. H m, dardel m and fathi a, 2015, optimal dynamic design of a planar. Design and analysis of dual side shaper using scotch yoke. This mechanism converts linear motion into rotational motion. The simplest of the mechanisms, the pulley, is also the earliest mechanism to have been used. The piston or other reciprocating part is directly coupled to a sliding yoke with a.
The location of the piston versus time is simple harmonic motion, i. The coil serves as a precision control element in a large linear accelerator. This feature plus a compact design are the major advantages of a scotchyoke mechanism in compressor design. The main purpose of the project is to get knowledge of design and fabrication.
Scotch yoke mechanism animation, advantages and application. Scotch yoke mechanism design, 48 pages an experienced mechanical engineer was asked to design a smooth reliable drive to oscillate a long slender induction coil gently and continuously. Mustafa arafa mechanical engineering department american university in cairo. The scotch yoke mechanism is most commonly used in control valve actuators in highpressure oil. The rsym is not a mechanism by rigorous definition because the output position is not uniquely determined by the input position, however has several advantages over other reciprocating mechanisms. Design and fabrication of hacksaw machine using scotch yoke mechanism pankaj vidhate, sagar vyavhare, sandip wagh vaibhav bajaj ratnadeep agale nitesh kathar6 1ug scholar, mechanical engineering department, sycet aurangabad, mh,india 2 ug scholar, mechanical engineering department, sycet aurangabad, mh,india. The scotch yoke mechanism to be consider for more efficient because of the rotational motion to spent more time at high point of it rotate than piston part. Scotchyoke piston actuators are classified as lineartorotary actuators. Design of scotch yoke mechanisms with improved driving dynamics show all authors. The design is an environment friendly and uses simple properties such as mechanical single slider and automation properties which uses crank mechanism. Series 6200 pneumatically operated cylinder actuator canted scotch yoke type 70171105en rev.
This scotch yoke mechanism could be used for conversion between rotational motion and linear reciprocating motion. The scotch yoke mechanism converts rotary to linear motion. A rotary actuator may be defined as a mechanism that converts linear force into quarterturn torque and is suitable for most valves but is. The hydraulic ram pump designed is believed to be the most suitable and efficient for the given conditions based on. This case study is part of the american society for engineering education asee engineering case library ecl, which can be downloaded in full as a 300mb zip file. Scotch yoke mechanism project for mech, production. The advantages of the scotch yoke over a crankshaft include fewer moving parts, smoother operation and more time spent in the dwell position, which in engines can improve efficiency slightly. This feature plus a compact design are the major advantages of a scotch yoke mechanism in compressor design. Monostable multivibrator and dc motor speed controller circuits were introduced into the design. Mechanics and machine design, equations and calculators. A good place to start is with the mechanism called the scotch yoke which converts a constant rotation into a perfectly sinusoidal motion known as simple harmonic motion. A dual side shaping machine for industrial applications.
In this paper a new detailed analytical investigation has been done to calculate pulsating torques for. For the application discussed herein, a scotch yoke mechanism has been employed in a line. The engineering case program originated at stanford university in 1964 with the support of the national science foundation. The widest usage of this mechanism is in pumping systems for oil, gas and other liquids. Design and fabrication of hydraulic ram pump mechanical project abstract this project report is about designing a hydraulic ram pump to transfer water from a river into a water tank with given dimensions and conditions.
The heart of the series 98 actuator is the scotch yoke. Design of whitworth quick return mechanism using noncircular gears 61 the purpose of this design is to improve the function of output velocity of the scotch yoke mechanism coupled with gears with the following conditions. This type of actuator has a distinct torque curve which starts high then dips toward the middle of the stroke and ends. The scotch yoke, also spelled scotch yoke and scotch yoke, is a mechanism for converting the linear motion of a slider into rotational motion or viceversa.
Handbook of machining and metal working calculations, ron a. Scotch yoke is a mechanism used to convert rotary motion into sliding motion. Scotch yoke mechanism is a type of a reciprocating motion. The rolling scotch yoke mechanism applied to a small air. It is inferred that the improved discharge and efficiency is achieved by the dual side water pumping system using scotch yoke mechanism.
1010 339 1092 670 925 662 1278 1329 131 172 76 767 560 418 1128 307 1170 721 1060 1330 1435 176 5 1062 849 538 873 430 1231