Latest Developments in Vosta Lmg Suction Systems
Type:
Presented during:
WODCON XVIII - 2007 Orlando, Florida, USA
Authors:
Johannsen
Abstract: This paper outlines latest developments in suction systems, focusing on various types of high efficiency/performance dredge pumps, standardization, and local manufacturing of parts. The increasingly strong demand for dredges has created the need to provide reliable and standardized suction systems with short delivery times. For the application of most modern/state of the art designed dredge pumps in high-performance suction systems, local manufacturing in the country of customer provides the benefit of sourcing at reasonable prices.
Dredge pumps, which can either be single or double walled, are the center unit of the suction system and the key to top dredging performance. By applying a gap sealing, including a newly developed adjustable liner on the suction side, suction performance can be improved. Movement of the liner in direction to the impeller nose provides a constant minimum of gap. At the same time, a new compact seal for suction sealing systems is developed and in operation.
Even under highest operating pressure, the lifetime of double walled dredge pump is increased because of smart pressure compensation between inner and outer casing. Standardization of parts for all types of dredge pumps is applied for shell, impeller, liner, shaft and bearing housing, with the objective to reduce the number of dredge pump parts, to enhance interchangeability, to safeguard shortest delivery time and delivery from stock, and effectively, to lower operating costs.
Keywords: Dredge pumps, lifetime, sealing systems, standardization of parts, interchangeability