10-09-2016, 03:55 PM
OPTIMIZING AND EFFICIENTLY USING HUMAN WORK TO LIFT AND TO SCREW OR UNSCREW THE BOLT FROM HEAVY VEHICLES
[attachment=70945]
OBJECTIVE:
Nowadays the technologies have been winding up and it is flourishing like a sea in the world. The newer generation greatly relies on the efficient usage of human work. We all know that a greater amount of energy is utilized in screwing and unscrewing the bolt from the wheels. So, in order to reduce the human work, being wasted, we designed an system so as to reduce the wastage of energy and to improve the efficiency of work done and also to permit easy screwing and unscrewing of bolt from vehicles especially heavy duty vehicles. Our system makes use of gear motor, whose shaft is used for performing the work, and fluid system is used for rotation of gears. Thus the reciprocating movement is converted into rotational movement which is then used to obtain the work.
METHODS:
EXISTING MODEL:
The truckers use the lever, in which load is applied vertically to tighten or loosen the bolt. The entire weight of man applying the load is concentrated on applying the load. The application of entire load on bolt may lead to destroying the thread that is already in the nut or on the bolt. This creates a problem to replace the entire set of nut and bolt.
PROPOSED METHOD :
We designed a method, in which, the power from the leg is used to lift the vehicle and to tighten or loosen the bolt. An external fluid tank is fitted to provide the fluid source and a spring return reciprocating pump which is operated by the leg provides / permits the fluid to pass through the tube and then to the hydraulic jack and to the pump and finally returns to the tank. The reason for the use of fluids is that it can be able to withstand high pressures and highly incompressible control valve is provided in order to change the flow direction of fluid from hydraulic jack to the pump.
PRINCIPLE :
The principle behind this method is purely based on the PASCAL’s Law, which states that ,”the force applied on the incompressible fluid is equally transmitted undiminished in all directions” , Thus the even a small force when applied by an small surface is made to act on the large surface the magnitude of force remains constant.
WORKING :
When the reciprocating pump is actuated manually, the piston retracts inside the pump wall, and suction and exhaust stokes are created in the pump which is used to force the fluid into the tubes. During suction the piston reaches the left end position, the low pressure is created which makes the fluid to enter the pump. At the end of suction stroke the exhaust stroke comes into action where a high pressure fluid is pumped out from the pump to the tube. First the fluid flows through hydraulic system where the entire weight is lifted by jack and the flow valve is controlled manually to change the flow of fluid direction into the gear motor. As the high pressure fluid forces into the gear motor the high pressure energy is converted into the force which when acting on the gear causes the gear to rotate. This rotation of gears are coupled to the bolt by shaft. This shaft is used to transmit the torque developed in the gear motor into the torque needed for the bolt to be screwed or unscrewed from the wheel. Since the fluid is working in the closed, as there are no air gaps, the fluid will be sucked in easily and high pressure can be easily developed with the minimum amount of work being done. The fluid after turning the gear returns back to the tank, which can be used to turn the gear further by utilizing the same fluid until the work is fully done.
RESULTS :
The entire system can be either built into a single piece or it can be individual parts which can be assembled later into a single product. This can be done based on the requirement. Suppose if we travel in a truck the product can be divided into individual parts and can be put together into system whenever it is in need. However for workshops, the entire thing can be setup in a single product and can be used accordingly.
The system can even be designed not only for single vehicle but for also multiple vehicles too. The shaft that is connected to the gear motor has the hub for holding the bolt. By adjusting or changing the hub based on different sizes of the bolt used, the system can be used to variety of vehicles that come into service.
In order to reduce the excessive pressure built up a simple pressure relief valve is provided, which gets into operation hence excessive pressure is built up. This relief valve also incorporates safety of the system due to pressure. By adjusting the pressure relief valve setting, the pressure developed is controlled and, which can be used to rotate bolts of various specifications or vehicles.
CALCULATIONS :
1.) As conventional method
consider an average man of about 75 kg and let the length of the lever as 50 cm..
then the torque developed = 75 x 9.81 x 0.50= 367.875 N-m.
2.) As per our method,
Let us consider that, the radius of gear in the gear motor as 10 cm and the radius of the
piston in reciprocating pump as 10 cm.
let the man operating the reciprocating pump is 50 kg
let the ratio of contact area of fluid on gear motor to pump is as small as 10.Then..
Torque developed = force by man / surface area * area * radius of the gear
= 50 * 9.81 * 10 * 0.1
= 490.5 N-m.
ADVANTAGES :
1. No heavy external load is needed
2. Operation is simple to use
3. The work is done at the faster rate than compared to the earlier practices.
4. Saves lot of energy during unscrewing many number of bolts from wheels.
5. No external power source is required
CONCLUSION:
Thus the human work is effectively used for lifting, unscrewing and screwing of heavy vehicles in this method.
[attachment=70945]
OBJECTIVE:
Nowadays the technologies have been winding up and it is flourishing like a sea in the world. The newer generation greatly relies on the efficient usage of human work. We all know that a greater amount of energy is utilized in screwing and unscrewing the bolt from the wheels. So, in order to reduce the human work, being wasted, we designed an system so as to reduce the wastage of energy and to improve the efficiency of work done and also to permit easy screwing and unscrewing of bolt from vehicles especially heavy duty vehicles. Our system makes use of gear motor, whose shaft is used for performing the work, and fluid system is used for rotation of gears. Thus the reciprocating movement is converted into rotational movement which is then used to obtain the work.
METHODS:
EXISTING MODEL:
The truckers use the lever, in which load is applied vertically to tighten or loosen the bolt. The entire weight of man applying the load is concentrated on applying the load. The application of entire load on bolt may lead to destroying the thread that is already in the nut or on the bolt. This creates a problem to replace the entire set of nut and bolt.
PROPOSED METHOD :
We designed a method, in which, the power from the leg is used to lift the vehicle and to tighten or loosen the bolt. An external fluid tank is fitted to provide the fluid source and a spring return reciprocating pump which is operated by the leg provides / permits the fluid to pass through the tube and then to the hydraulic jack and to the pump and finally returns to the tank. The reason for the use of fluids is that it can be able to withstand high pressures and highly incompressible control valve is provided in order to change the flow direction of fluid from hydraulic jack to the pump.
PRINCIPLE :
The principle behind this method is purely based on the PASCAL’s Law, which states that ,”the force applied on the incompressible fluid is equally transmitted undiminished in all directions” , Thus the even a small force when applied by an small surface is made to act on the large surface the magnitude of force remains constant.
WORKING :
When the reciprocating pump is actuated manually, the piston retracts inside the pump wall, and suction and exhaust stokes are created in the pump which is used to force the fluid into the tubes. During suction the piston reaches the left end position, the low pressure is created which makes the fluid to enter the pump. At the end of suction stroke the exhaust stroke comes into action where a high pressure fluid is pumped out from the pump to the tube. First the fluid flows through hydraulic system where the entire weight is lifted by jack and the flow valve is controlled manually to change the flow of fluid direction into the gear motor. As the high pressure fluid forces into the gear motor the high pressure energy is converted into the force which when acting on the gear causes the gear to rotate. This rotation of gears are coupled to the bolt by shaft. This shaft is used to transmit the torque developed in the gear motor into the torque needed for the bolt to be screwed or unscrewed from the wheel. Since the fluid is working in the closed, as there are no air gaps, the fluid will be sucked in easily and high pressure can be easily developed with the minimum amount of work being done. The fluid after turning the gear returns back to the tank, which can be used to turn the gear further by utilizing the same fluid until the work is fully done.
RESULTS :
The entire system can be either built into a single piece or it can be individual parts which can be assembled later into a single product. This can be done based on the requirement. Suppose if we travel in a truck the product can be divided into individual parts and can be put together into system whenever it is in need. However for workshops, the entire thing can be setup in a single product and can be used accordingly.
The system can even be designed not only for single vehicle but for also multiple vehicles too. The shaft that is connected to the gear motor has the hub for holding the bolt. By adjusting or changing the hub based on different sizes of the bolt used, the system can be used to variety of vehicles that come into service.
In order to reduce the excessive pressure built up a simple pressure relief valve is provided, which gets into operation hence excessive pressure is built up. This relief valve also incorporates safety of the system due to pressure. By adjusting the pressure relief valve setting, the pressure developed is controlled and, which can be used to rotate bolts of various specifications or vehicles.
CALCULATIONS :
1.) As conventional method
consider an average man of about 75 kg and let the length of the lever as 50 cm..
then the torque developed = 75 x 9.81 x 0.50= 367.875 N-m.
2.) As per our method,
Let us consider that, the radius of gear in the gear motor as 10 cm and the radius of the
piston in reciprocating pump as 10 cm.
let the man operating the reciprocating pump is 50 kg
let the ratio of contact area of fluid on gear motor to pump is as small as 10.Then..
Torque developed = force by man / surface area * area * radius of the gear
= 50 * 9.81 * 10 * 0.1
= 490.5 N-m.
ADVANTAGES :
1. No heavy external load is needed
2. Operation is simple to use
3. The work is done at the faster rate than compared to the earlier practices.
4. Saves lot of energy during unscrewing many number of bolts from wheels.
5. No external power source is required
CONCLUSION:
Thus the human work is effectively used for lifting, unscrewing and screwing of heavy vehicles in this method.