Düsterloh pneumatic starters are used to start up diesel engines and turbines.The DÜSTERLOH pneumatic starter mainly comprises a gear motor, a reduction gear unit, a free-wheel and a valve combination. As the gear motor produces its highest torque at breakaway, it is particularly suitable for starting diesel engines. The available series is able to start diesel engines up to 3300 kW with an operating pressure of 10 bar. For higher starting powers, 2 starters can be operated in parallel. A safety circuit is available which only allows the diesel engine to be started when the pinions of both starters are fully meshed with the gear ring of the diesel engine. The dependable operating behaviour of the drive motor ensures that the diesel engine starts reliably, even under extreme ambient conditions. It is used in theArctic, off-shore and in desert regions. Starting procedure PS series The starting procedure is performed by gradually opening a self-closing valve or main valve, which is usually mounted directly on the starter. The pressure acting on the engaging piston causes axial displacement of the pinion towards the flywheel gear ring while at the same time rotating it slowly. After engagement of the pinion, the actual starting procedure begins, which has to be stopped by closing the self-closing/main valve after the ignition speed has been reached. To ensure that the starter does not rotate at excessively high speeds when overtaken by the diesel engine, it is protected by an integratedmulti-plate clutch. PS......HYseries Addition of the HY-tact system to the standard starter ensures soft engagement of the pinion with the engine gear rim. This system ensures long life and reliability of the meshing gears. The start pinion is gently pushed out to meet the engine gear rim, if the pinion does not hit a tooth gap, it retracts and is rotated slightly ready for the next cycle. The cycle repeats until the pinion finds a gap and canmove into full mesh, at this point, air is switched onto the starter to crank the engine. After the engagement, the starting procedure is performed automatically and must be stopped as soon as the ignition speed is reached. This can take place manually or automatically by means of a speed monitor. The pinion is then withdrawn from the gear ring by spring force. Power is transmitted from the motor drive to the pinion via a free-wheel, which at the same time protects the starter frompotential damage when overtaken by the diesel engine. Owing to the patented operating principle, the starters of this series do not need bevelling on the front of the pinion and gear ring. Slow-turning A turning valve installed in the control block me-ans that the starter can also be used for ‚slowturning‘, i.e. for removing water from the pistons (prevents vapour shock). On large diesel engines, the piston position required during repair work can be approached precisely with the help of the turning device. Advantages of these starters » Extremely high breakaway torques. » High starter powers with low air consumption. » Suitable for remote andmanual operation. » Long service life, nomaintenance required. » Explosion protection. » Operation even under extreme climatic conditions. » Interchangeable with electric starters. » Air and gas operation. » Independence fromelectrical energy storage devices. » Slow-turning device. » No oilers required. » Nomaintenance unit (oil lubrication) required. » Connection dimensions as per SAE J 542 C. » Steel and bronze pinions. » Starter with integrated free-wheel. 1 #DriveLineHarmony www.jbj.co.uk/pneumatic-starters.html Pneumatic Starters Description & Operation
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