Spring starter is a cost-effective mechanical starting device, which provides engine emergency starting solution when the battery lacks power. The
mechanical spring starter is a complete system, not any other auxiliary required, widely used in the fire pump, military, marine, emergency rescue, petrochemicals, etc.
Working principle of spring starter
Spring starter uses disc springs to store and release energy, suits mini, medium, heavy-duty, and super heavy-duty diesel engines.
Spring starter composition
One spring starter assy is comprised of four mechanical systems including hand cranking, energy storage, energy release and clutch system.
Hand cranking system
The hand cranking system consists of the crankshaft, drive gear, etc. It is designed to input and conveys manpower. There are four functions of this system. First, it determines the space and angle for hand cranking. That makes operating more convenient and comfortable. Second, the rotation direction of input torque is adjustable, ensuring rotation direction accord with the axis direction of the spring starter’ main shaft. Third, the hand-cranking system limits the reverse rotation of the input adaptor. Fourth, it supports the main shaft in axis direction and thrust the main shaft in the radial direction.
Energy storage system
The energy storage system is the main mechanism of the spring starter. It consists of disc springs, main shaft, and some other auxiliary parts. There are two functions. One is converting input torque from the hand-cranking system to the force in the axial direction. The disc springs will be compressed by this force to store energy. The other one is converting the potential energy of disc springs to the output torque of the main shaft.
Engine release system
The release system is manipulating the mechanism of the spring starter. Its main spare parts are reset knob assy and trip lever. Reset knob controls energy storage status. Manipulate reset knob to stop the main shaft from rotating, so that the whole system is ready for energy storage. When energy is full, manipulate the trip lever to release the main shaft. While disc springs will be decompressed, and the main shaft starts to rotate, driving the drive pinion to rotate, in order to drive the engine flywheel.
Clutch system
Clutch system controls spring starter engage and disengage with engine flywheel. The major part of the clutch system is the drive pinion. It is able to move in an axial direction with the aid of a spiral flute on the main shaft. Before starting the engine, the rotation of the main shaft drives the pinion to move forward to engage with the engine flywheel. When the engine starts to work, the engine flywheel’s rotation will drive the pinion to disengage with it.
