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The starters are used to scroll through the crankshaft. engine starting system consists of a battery, a starter and a starter control device. The starter needs to run diesel engines. It represents DC series excitation motor current and comprises a steel body in which the field winding 4 are four pole, the armature 4 and the collector brushes. The brushes in the brush holders and are produced from mednografitosvintsovogo powder of tin impurities. Two positive brush isolated from the starter housing and connected to the ends of the excitation winding, and two with negative weight.
The winding is made of copper, since possible current to 1500 A. The principle of operation is based on the interaction of the magnetic field with the field of the armature during the passage of current through the windings and is powered by a battery. In modern tractors starters use with remote control and electro-magnetic switching. His drive includes relays, magnetic switch and drive mechanism.
drive mechanism gives the torque from the armature shaft of the motor flywheel and disconnects the starter motor and the crankshaft anchor after engine start. It consists of gears, freewheel and springs. The overrunning clutch prevents separation of the armature after the engine starts, since transmits momentum solely on the armature shaft to the flywheel.
Electro-magnetic magnetic switch forcibly enters a gear in mesh with the crown of the flywheel and starter feeds from the battery and is mounted on the starter housing. When applying current to the relay coil and the traction force generated magnetic field which moves armature coils in the middle, and is transmitted onto the support sleeve, and the force of the spring through it to freewheel. Sleeve together with the pinion gear moves along the helical splines and engages with the teeth of flywheel ring. In this case, the anchor of the traction relay moves the movable contact and closes the contacts and connecting terminals to the starter battery. After contact circuit current from the battery is supplied to the excitation coil and the armature in consequence of which magnetic fields are created, under which the interaction of the anchor starts to rotate, and the engine running.