An important part of the engine - the starter


At present, most internal combustion engines use a direct current electric starter, which has large torque at low speed and gradually becomes smaller at high speed. It is characterized by a compact structure, simple operation, and easy maintenance. In fact, according to the working principle, the starter can be divided into compressed air starter, gasoline starter, and direct current starter. This article will describe the composition and principle of the starter in detail.


The composition of the starter

The starter consists of an electromagnetic switch, a drive mechanism, a one-way gear, a planetary gear reducer, and a motor.

The electromagnetic switch is mainly composed of moving contact assembly, static contact assembly, moving core assembly, and switch body.

The driving mechanism is mainly composed of the drive shaft assembly, spline shaft segment, dial ring, drive gear, and so on.

Each part is composed of smaller parts, any part of the damage, needs timely repair and replacement, if you need parts, you can click on the mall to buy.


The principle of the starter

The starter, also known as the motor, is used to convert the electrical energy input by the battery into the mechanical power that drives the engine to rotate. Dc engine is generated by the DC motor power, through the starting gear of the starter to the flywheel tooth ring, driving the flywheel and crankshaft rotation, thus starting the engine. The process of the engine from stationary to running must be pushed by external forces. After the crankshaft is rotated, the engine can get the initial intake, compression, and combustion work and other processes to complete the start.


The following sections describe in detail the specific role of each component in the starter.

When the moving contact assembly and the static contact assembly in the electromagnetic switch are connected, a suction force is generated between the moving core in the moving contact and the static core in the switch body. After the moving iron core is driven, it begins to move and pulls with the set pull rod through the shifting fork, and the driving gear moves along the drive shaft assembly. At the same time that the driving gear moves, the one-way device moves with it, and the driving gear moves and engages with the flywheel of the engine. At the same time, when the moving contact and the static contact are connected, the motor starts and the motor drives the shaft assembly to rotate. Thus, the drive gear drives the flywheel of the engine to rotate and start the engine.


The electric pivot of the motor is splined with the sun wheel of the planetary gear reducer. The planetary gear and the guide cylinder of the one-way gear are connected through a pin shaft, and the inner ring of the one-way gear is fixed with the gear shaft.



As an important part of the engine, the starter is an important power source. If you need to replace the starter or need other engine parts, you can contact us, we will provide you with quality assurance products and professional service.



If the starter often fails to turn or turns slowly, what should be checked?

Check the battery first. Most likely because of a weak battery or weak power.

Secondly, check whether the starter's wire head falls off or loosens, failing the switch or adsorption switch.

Check the brush again, if the brush is worn or the brush surface is not correct, it may cause the spring to be weak, resulting in poor contact with the rectifier, resulting in the starter can not turn or turn slowly.

Of course, if the rectifier is soiled and the mica sheet bulges, it will also cause poor contact between the brush and the rectifier.

There is also a part to check, the excitation coil or armature coil short circuit or open circuit will also cause the starter failure.


How should the starter be maintained?

You need to pay attention to the starting time of the starter. According to the principle of the starter, the starter is to convert the battery input electrical energy into mechanical power to drive the engine to rotate, in this process, the battery needs to be introduced to 300-400ah of electricity, therefore, to prevent the battery from overcurrent or damage, the starting time is best not to exceed 5 seconds. If starting is difficult, multiple starts need to have a certain time interval, at least 2 minutes, and the time of each start should not be too long.

Relating reading:

WDPART: A Comprehensive Odyssey in Mechanical Mastery

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