Several Types of Diesel Generator Starters

The starters of diesel generators can be classified into direct operated starters and electromagnetic operated starters according to their control devices; According to the meshing mode of the transmission mechanism, it is divided into inertia meshing starter, forced meshing starter, armature moving starter, gear moving starter, and deceleration starter.

Classified by control device

1. Direct operated starter. It is directly controlled by a foot pedal or hand lever linkage mechanism to turn on or off the main circuit switch of the starter, also known as a mechanical starter, as shown in the figure. Although it has a simple structure and reliable operation, it is rarely used due to the requirement for the starter and battery to be close to the cab, limited by installation layout, and inconvenient operation.

2. Electromagnetic operated starter. It is controlled by a button or ignition switch, and then the relay controls the main switch of the starter to turn on or off the main circuit, also known as electromagnetic controlled starter. It can achieve remote control, is convenient to work, and is widely used in modern cars.

Classified by the meshing mode of the transmission mechanism

1. Inertial meshing starter. When the starter rotates, its biting small gear automatically meshes into the flywheel ring gear through inertial force. After starting, the small gear automatically disengages from the flywheel ring gear through inertia force. This type of meshing mechanism has a simple structure but cannot transmit large torque, and its reliability is poor, so it is rarely used.

2. Forced engagement starter. Force the small gear to bite the flywheel ring gear by pulling the lever manually or electromagnetic force. Its meshing mechanism has a simple structure, reliable action, and convenient operation, and is still adopted by modern automobiles.

3. Armature moving starter. By relying on the suction force of the magnetic flux of the starter motor, the armature moves axially and the small gear is inserted into the flywheel ring gear. After starting, the armature is returned to its original position by the return spring, allowing the drive gear to exit the flywheel teeth

4. Geared mobile starter. It relies on the electromagnetic switch to rotate the engagement rod installed in the armature shaft hole, causing the small gear to mesh into the flywheel engagement ring.

5. Reduced speed starter. Push the one-way clutch through electromagnetic suction to insert the small gear into the flywheel ring gear.

For starters used in small and medium-sized diesel generators, deceleration starters are currently commonly used. The basic structural principle is as follows: a starter with a gear reducer installed between the armature shaft of the starter and the driving gear is called a deceleration starter. The power of a series excited DC motor is directly proportional to its torque and speed. If the torque is reduced while increasing the motor speed, the starter power can be kept constant. Therefore, when a high-speed and low torque series excited DC motor is used as the starter, the volume and mass of the starter can be greatly reduced under the same power. However, the torque of this type of starter is too low to meet the requirements for starting a diesel engine.

Therefore, when using a high-speed, low torque DC motor in the starter, installing a gear reducer between the motor's armature shaft and the driving gear can reduce the motor speed while increasing its torque. The gear reducer of the deceleration starter has three different forms: external meshing type, internal meshing type, and planetary gear type.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to sales@dieselgeneratortech.com we will pay highly attention on your question