Escher was already supplying Crystallisers twenty years ago, but because there are no longer personnel within the organisation who previously worked on this, the new Crystallisers must be designed based on the old data. Moreover, the specifications have intensified. We have travelled several times to China to first, convince the customer that Escher's solution was the best and safest option. And especially, to take on board the wishes of the customer.
One of the requirements is an extra safety feature, a torque limiter, developed for the gearbox and with planetary gears in three stages. In the exceptional case that the motor jams or a tooth breaks off a sprocket , the liquid will take the rotor with it and the forces will become ten times greater than the forces delivered by the motor. Should this happen, the torque limiter will intervene and disconnect the rotor from the motor.
Compared to the old design, further improvements have been made, such as a dry gas mechanical seal and a direct drive mechanism . The construction is calculated at the higher speed at which this installation will run at 20 revolutions per minute, compared to 11 revolutions with the former design.
The extensive article can be found in our magazine.