The world leader for proven processing solutions. Gear ... - Suurmond
The world leader for proven processing solutions. Gear ... - Suurmond The world leader for proven processing solutions. Gear ... - Suurmond
1 Compounding polyrex ® goes gentle on melts. Extruders without gear pumps require a certain length to generate the required pressure. This length depends on the rheological properties of the polymer melts and the extruder itself. However, the process invariably involves inefficiencies as some of the extruder’s mechanical energy is converted into non-useful heat. In the case of temperature-sensitive polymers, the permitted melt temperature cannot be ex- ceeded without the melt being permanently damaged. On compounding lines with a polyrex ® gear pump downstream, virtually all the pressure built up by the extruder or kneader is no longer needed since the more efficient pump has taken over the responsibility for pumping. This in turn can lower the melt temperatures in the extruder by as much as 30 °C, and yields an overall energy saving of as much as 25% for the extruder and pump together versus a line running with an extruder alone. A pressure regulator keeps the suction-side melt pressure of the polyrex ® gear pump constant by tracking the speed of the pump. What’s more, certain parameters such as bearing temperatures are continuously monitored. This guarantees an optimum running process at all times. Properties of polyrex ® • Gentle pumping of polymer melts • Preparation of different polymers melts with large Melt Flow Index ranges • Throughputs up to 100 tons per hour • Higher system throughput rates than without gear pumps • Constant throughputs independent of pressure • Lower energy requirements, with total annual energy savings as high as 25% • Long service life and durability • Reduced wear on the extruder barrels and screws • Shaft and bearing cooling possible, including retrofits, for increased output rates
The benefits of the gear pump system. Both shafts can be independently driven and synchronized by an external gear reducer, rather than having one gear driving the other. Within the pump, this reduces the friction between the tooth flanks and ensures even force distribution over the two gears. A set of separate drive shafts between the gear box and polyrex ® sets the backlash clearance between the gear teeth to prevent them from con- tacting each other. The following options are offered: • Gear couplings • Shaft and bearing cooling for increased output rates • Cooling equipment • Transfer and reduction gearbox that can be used in tandem • Lubrication oil gearbox supply units Bearing temperature Without cooling With shaft cooling 100% throughput The benefits of the polyrex ® gear pump system are: • Extended life of the shafts • Gentle pumping of polymer melts • Increased reliability Compounding Retrofitable shaft and bearing cooling. The larger the gear pump, the greater the heat generated in the bearings. Excess temperatures reduce throughput by limiting the allowable pump speed. It can also damage the polymer that serves as a lubricant between bearings and shafts as it is pumped. Maag Pump Systems has developed a new generation of gear pumps with com- bined shaft and bearing cooling. This option has been proven to effectively dissipate internal pump heat build up, enabling higher pump speeds and throughputs. Installed gear pumps can also be field retrofitted to take advantage of this benefit. With shaft and bearing cooling 150% throughput 200% throughput 15 Pump speed or throughput
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<strong>The</strong> benefits of the gear pump system. Both shafts<br />
can be independently driven and synchronized by an external gear reducer,<br />
rather than having one gear driving the other. Within the pump, this reduces the<br />
friction between the tooth flanks and ensures even <strong>for</strong>ce distribution over the<br />
two gears. A set of separate drive shafts between the gear box and polyrex ®<br />
sets the backlash clearance between the gear teeth to prevent them from con-<br />
tacting each other. <strong>The</strong> following options are offered:<br />
• <strong>Gear</strong> couplings<br />
• Shaft and bearing cooling <strong>for</strong> increased output rates<br />
• Cooling equipment<br />
• Transfer and reduction gearbox that can be used<br />
in tandem<br />
• Lubrication oil gearbox supply units<br />
Bearing temperature<br />
Without cooling<br />
With shaft cooling<br />
100% throughput<br />
<strong>The</strong> benefits of the polyrex ® gear pump system are:<br />
• Extended life of the shafts<br />
• Gentle pumping of polymer melts<br />
• Increased reliability<br />
Compounding<br />
Retrofitable shaft and bearing<br />
cooling. <strong>The</strong> larger the gear pump, the greater the heat<br />
generated in the bearings. Excess temperatures reduce<br />
throughput by limiting the allowable pump speed. It can<br />
also damage the polymer that serves as a lubricant between<br />
bearings and shafts as it is pumped. Maag Pump Systems<br />
has developed a new generation of gear pumps with com-<br />
bined shaft and bearing cooling. This option has been<br />
<strong>proven</strong> to effectively dissipate internal pump heat build up,<br />
enabling higher pump speeds and throughputs. Installed<br />
gear pumps can also be field retrofitted to take advantage<br />
of this benefit.<br />
With shaft and bearing cooling<br />
150% throughput<br />
200% throughput<br />
15<br />
Pump speed or throughput
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