@IJRTER-2016, All Rights Reserved 161 Design & Analysis of Overload Torque Limiter with Electromechanical Clutch for Timer Belt Spindle Drive Mr. Nitesh A. Kulkarni 1 , Prof. V. R. Gambhire 2 1 M.E. Student, Mechanical department, TKIET, warananagar, Kolhapur 2 Prof., Mechanical department, TKIET, warananagar, Kolhapur Abstract— Clutches are used to transmit power between two coincident shafts. The positive engagement between the clutch elements ensures 100% torque transmission. But occasionally the output shaft may the subjected to a sudden overload which may make the driving motor or engine to stop, which will lead to burnout of the electric motor. In extreme cases this overload will lead to the breakage of drive elements or the clutch itself. In order to avoid the damage of the transmission elements it is necessary that the input and output shafts be disconnected in case of sudden overloads. Torque-limiters are overload safety devices which provide reliable overload protection. When a jam- up or excessive loading occurs the torque limiter will reliably and quickly disengage to prevent the system damage. The clutch transmission elements i.e. the balls will not come out of assembly when there is overload slipping. This will be an advantage as the clutch can be preset without removing it from assembly and will save considerable amount of downtime of process as compared to the conventional clutch. If temporary overload occurs the clutch will slip and remain disengaged only till the overload is removed thus if the overload is removed while in running condition the clutch shall automatically engage and start transmitting power. This leads to minimize process down time saving a considerable amount of man and machine hours wasted due to breakage or presetting as in conventional clutches. Keywords— Overload Torque Limiter, Timer Belt, Solenoid, Theoretical (Th.). I. INTRODUCTION Whenever an overload occurs in any shaft drive mechanism there are possibilities, Shaft / coupling/ belt drive may fail or break, Application machine shaft may fail or break, Motor will be overloaded resulting into electric burn. In any case the system will be damaged, leading to machine part replacement, increased down time of machine, increased part replacement and maintenance cost. In order to avoid the damage of the transmission elements it is necessary that the input and output shafts be disconnected in case of sudden overloads. The isolation of the input driver member i.e., motor from the output member is absolutely necessary to avoid damage and it is possible by overload slip ball clutch. II. OBJECTIVES 2.1 Objectives 1. To reduce machine down time so as to improve productivity. 2. To run the system smoothly. 3. To reduce maintenance cost. 2.2 Working Methodologies [a] To carry system design as to number of ball-springs for desired torque capacity. [b] Design of the groove profile in input base flange. [c] Design of spring plunger profile. [d] Selection and geometrical profile of clutch body ball holder.
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Design & Analysis of Overload Torque Limiter … & Analysis of Overload Torque Limiter with Electromechanical Clutch for Timer Belt Spindle Drive Mr. Nitesh A. Kulkarni1,Prof. V. R.
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@IJRTER-2016, All Rights Reserved 161
Design & Analysis of Overload Torque Limiter with Electromechanical
Clutch for Timer Belt Spindle Drive
Mr. Nitesh A. Kulkarni1, Prof. V. R. Gambhire2 1M.E. Student, Mechanical department, TKIET, warananagar, Kolhapur