hydraulic jack motorised 2015
Post on 09-Dec-2015
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DESCRIPTIONproject report motorised hydraulic jack
MOTORIZED HYDRAULIC JACK
This is a self assessment test on the part of the students to assess his competency in creativity.During the course of study, the student is put on a sound theoretical foundation of various mechanical engineering subjects and of course, to a satisfactory extent. Opportunities are made available to him to work on different kinds of machines, so that he is exposed to various kinds of manufacturing process.As a students learn more and more his hold on production technology becomes stronger. He attains a stage of perfection, when he himself is able to design and fabricate a device.This is the project work. That is the testimony for the strenuous training, which the student had in the institute. This assures that he is no more a student, he is an engineer.This report discuses the necessity of the project and various aspects of planning , design, selection of materials, fabrication, erection, estimation and testing.
SYNOPSISAccording to the current situation, scarcity of LABOUR , SALARY, and for automatic operation elimination of labour work is neccessory for the future days. In current situation , car tyre is removed for repair work a jack is must and it is operated by manually and not so easy to handle. Thus to tackle both situation which is mentioned above. So we selected MOTORISED HYDRAULIC JACK . The working of MOTORISED HYDRAULIC JACK is described below,It consist of DC motor. The electric power is used to run the motor by the help of 12 Volt DC supply . One end of jack lever is connected to Dc motor output shaft through the crank wheel. . The power from the dc supply is given to electric motor from the 12V DC power supply...Thus, by introducing this project on market dual advantage is obtained one is the easy operation is made and usage of manual work is avoided..
1. Single person is enough to operate this efficiently to lift the tyre. 2. Easy and efficient handling of this unit without wastage or damage to any other parts. 3. Increase the unit life. 4. Least maintenance of the equipment. 5. Need not require any individual work place. 6. Can be worked in the work spot.
COMPONENTS USED FOR DIGITAL HYDRAULIC JACK
1M.S.FABRICATED BASE 8MM THICKPLATEMILD STEEL200X200X8MM (WXHXD)1
212VDC MOTOR WITH BUILT IN SPEED REDUCTION GEAR BOXALUMINIUM10KG TORQUE1
3CRANK DISC MILD STEEL70MM DIA X8MM THICK1
4ELECTRICAL CONTROLPOWER SUPPLYCOPPER 3 AMPS1
5HANDLEMILD STEEL12MM DIA1
6HYDRAULIC JACK MILD STEEL 2 TON CAPACITY1
7METAL PRIMER PAINT LITRE1
CONSTRUCTIONThe projects consists of 1. M.S . BASE FRAME 2. HYDRAULIC JACK3. 12 VDC POWER SUPPLY4. 12 VDC motor.5. ELECTRIC POWER SUPPLY .
4. 12 DC MotorThis DC motor is shunt type 12 DC motor. It has high torque and low speed capacity. The DC Motor drives transmitted to the handle of the jack.
. This motor is having built in type speed reduction gear box unit. It has high torque and low speed capacity. The electrical supply to the motor is from 12 V DC power supply.
2.Crankand connecting rod mechanism;
A crankshaft has one (or more) offset sections where a connecting rod is attached around it. The connecting rod moves back-and-forth (or up-and-down) ONCE for every rotation of the crankshaft. The crank will always move in a circle, moving the connecting rod in a smooth sine wave like motion. The power can flow in either direction. 3.Frame Stand
This base frame stand made in 25mm size x 1.8mm thick M.S.square tube material base plate and is used to hold the entire mechanism and support the motor also.
230 V ACThe working principle of this MOTORISED HYDRAULIC JACK is explained in block diagram
Power supply12 VDC
This MOTORISED JACK has one 12 VDC motor. This DC motor drive is transmitted to the jack unit through the CRANK mechanism .. The vehicle tyre ias lifted up and down by pressing the switch in the panel board. The 12 V DC supply is supplied from the 12 V DC motor. The vehicle tyre is moved up slowly without any sack .
PRINCIPLE OF DC MOTOR
PRINCIPLE OF DC MOTOR
A DC motor is a dc machine working as a motor to convert dc electrical energy into mechanical energy (dc) motor are very commonly used in cars, trucks, aircrafts, etc. They are also used in large ratings, where wide range of speed control is necessary.When a conductor is carried a current and in lying in magnetic filed. Force acting on the conductor. This is the principle of a Dc motor. The conductor is housed in armature slots and current is applied from the dc source through brushes and commutator. The field poles provide the magnetic field.
The construction of dc motor and generator are similar. However their external appearance may be somewhat different. A motor has a rather closed frame because it is may be operating in dusty environment and unskilled workers may be working in its vicinity.
TYPES OF DC MOTOR
TYPES OF DC MOTOR
DC Shunt Motor:
This motor has medium starting torque, a speed regulation of 5 10 % and excellent adaptability to adjustable speed service. It can be used for constant speed drives like pumps, fans blowers, etc,. However for all these applications, a 3 phase induction motor is preferable, because it ;is cheaper, more rugged and requires lesser maintenance than dc motor. However a dc shunt motor is cheaper for low speed drives. Moreover, whenever a wide range of speed control is required, dc shunt motor is used. The main application of dc shunt motor is in steel and aluminium, rolling mills and ward Leonard speed control system.
Dc Series Motor:
This motor has a very high starting torque. Moreover it speed decreases with increase in load torque. So that its power input remains more or less constant. It is best suited for hoist cranes and traction. Speed control is generally obtained through armature control. They are used for battery-powered vehicles.
A differential compound is rarely used. The characteristics of a cumulative compounds motor depend on the relative strength of series and shunt fields. It has good starting torque and dropping speed load characteristic. They can be used for pulsating loads needing flywheel action, viz. shears, conveyors, crushers, hoists, plunger pumps, etc., Whenever the supply voltage is likely to vary considerably, a compound motor is preferred. Because its induction and contribution to back emf, the series field helps in reducing the fluctuations of current drawn from mains.
POWER SUPPLY UNIT
INTRODUCTION:All the electronic components starting from diode to Intel ICs only work with a DC supply ranging from +5V to +12V. We are utilizing for the same, the cheapest and commonly available energy source of 230V-50Hz and stepping down, rectifying, filtering and regulating the voltage. STEP DOWN TRANSFORMER:When AC is applied to the primary winding of the power transformer, it can either be stepped down or stepped up depending on the value of DC needed. In our circuit the transformer of 230V/15-0-15V is used to perform the step down operation where a 230V AC appears as 15V AC across the secondary winding. Apart from stepping down voltages, it gives isolation between the power source and power supply circuitries. RECTIFIER UNIT:In the power supply unit, rectification is normally achieved using a solid state diode. Diode has the property that will let the electron flow easily in one direction at proper biasing condition. As AC is applied to the diode, electrons only flow when the anode and cathode is negative. Reversing the polarity of voltage will not permit electron flow. A commonly used circuit for supplying large amounts of DCpower is the bridge rectifier. A bridge rectifier of four diodes (4 x IN4007) are used to achieve full wave rectification. Two diodes will conduct during the negative cycle and the other two will conduct during the positive half cycle, and only one diode conducts. At the same time one of the other two diodes conducts for the negative voltage that is applied from the bottom winding due to the forward bias for that diode. In this circuit due to positive half cycle D1 & D2 will conduct to give 0.8V pulsating DC. The DC output has a ripple frequency of 100Hz. Since each alteration produces a resulting output pulse, frequency = 2 x 50 Hz. The output obtained is not a pure DC and therefore filtration has to be done. The DC voltage appearing across the output terminals of the bridge rectifier will be somewhat less than 90% of the applied rms value. Normally one alteration of the input voltage will reverse the polarities. Opposite ends of the transformer will therefore always be 180 degree out of phase with each other. For a positive cycle, two diodes are connected to the positive voltage at the top winding.FILTERING CIRCUIT:Filter circuits which is usually capacitor acting as a surge arrester always follow the rectifier unit. This capacitor is also called as a decoupling capacitor or a bypassing capacitor, is used not only to short the ripple with frequency of 120Hz to ground but also to leave the frequency of the DC to appear at the output. A load resistor R1 is connected so that a reference to the ground is maintained.
DETAILS OF HYDRAULIC JACK;
DETAILS OF HYDRAULIC JACK;HYDRAULIC JACK
A Hydraulic Jack or for that matter any device using Hydraulic Power in its simplest possible shape consists of five fundamental components.
A. The Hydraulic Reservoir storing the Hydraulic