Our special duty seal for the oscillating blade roots of Kaplan water turbines.
Solosele KB Hydro is a profiled elastomeric seal specifically developed for the oscillating blade roots of Kaplan water turbines.
This seal is reinforced at the base with an integral anti-extrusion element of rubber-proofed fabric that is securely mould-bonded to the lip portion. The anti-extrusion element is sufficiently tough to stop the seal from 'stretching and bunching' when the shaft rotates, yet is remarkably flexible for ease of fitting.
The very short axial length of this seal saves valuable housing space in new equipment. On older equipment with deeper housings, spacer rings can be supplied to move the sealing elements to unworn areas of the shaft.
Solosele KB Hydro has operated with great success for many years on the blade roots of Kaplan water turbines at hydroelectric schemes across the world - both as an OEM fit and as retrofit on older equipment. It has out-performed and run significantly longer than many multi-lip seals and other types at these sites.
A Solosele KB Hydro sealing arrangement typically comprises two seals fitted back-to-back in the blade root housing. This keeps lubricant in the system and prevents the ingress of water and abrasive particles.
When the seal is in its housing, the radial squeeze on its elastomeric body provides low pressure sealing suitable for stationary and turbine start-up conditions. As system pressure rises, the seal responds accordingly to maintain constant sealing force under fluctuating and reversing pressure differentials (including negative pressure) between the oil and water.
In addition, the seal's highly developed profile enables it to overcome high levels of eccentricity or shaft offset caused by bearing wear at the blade root.
Solosele KB Hydro does not need axial compression, therefore housing length tolerances can be relaxed and installation becomes a simple procedure. This is particularly valuable to turbine manufacturers when fitting endless-type seals during plant assembly.
Days of unnecessary turbine downtime and associated labour costs are saved when you retro-fit Solosele KB Hydro with On-Site Joining (OSJ).
Using our special OSJ technique, the split single-element Solosele KB Hydro is efficiently joined to form an endless seal around the shaft. OSJ gives you the performance of a fully moulded seal with the maintenance benefits of a split seal - at best value price.
We have developed this technique to help customers who wanted a simple yet highly efficient seal that could be fitted swiftly and easily on site without removing the turbine blade. Before Solosele KB Hydro and OSJ , the only answer was to use an expensive split multi-lip seal that demanded great skill in fitting to obtain effective results.
Solosele KB Hydro is supplied as endless seals that are ideal for OEM assembly; or split seals with OSJ kits for retrofitting. There is a range of radial sections to suit Kaplan blade root housings (see relevant fitting guide for full details. Solosele KB Hydro >19 mm section. Solosele KB Hydro <19 mm section ).
When specifying, please state James Walker Solosele KB Hydro, and the following dimensions (in mm):
Also note any special considerations concerning your application (including requirement for Endless-type seals or OSJ), then contact us for technical advice. We are more than willing to discuss the exact details of your application before you place your order.
Want to discuss your project, engineering or materials challenge expert to expert? Simply provide us with your contact details and a little information about the application you are working on, and one of our experts will contact you as soon as possible.