When vacuum is obtained by injecting resin into GRP components for ships, shipyards are equally concerned about quality. The emergence of rotary vane vacuum pump provides great convenience for shipyards. Rotary vane vacuum pump is one of the most basic vacuum acquisition equipment in vacuum technology. It can be used alone or as a pre-pumping pump for booster pump, maintenance pump and titanium pump. It can be used in printing, photo plate making, food packaging, vacuum plastic absorption, refrigeration equipment maintenance and equipment matching. Today, this paper focuses on the application of rotary vane vacuum pump in shipbuilding, so that you can deepen your understanding of vacuum pump.
How does the rotary vane vacuum pump work? Let’s solve it together.
When the rotary vane vacuum pump is lower than the saturated vapor pressure at the pump temperature, it can be filled with gas and discharged out of the pump at any time to prevent solidification in the pump oil. In addition, when the closed pump mouth is running, the condensate or vapor phase of the condensable gas that has been mixed into the oil will dissolve in the oil, and will spill out from the pump chamber. At this time, if the task of the air-opening town, a certain amount of condensable substances can also be extracted, thus playing a certain role in pollution and extending the service life of the pump oil. Rotary vane vacuum pump oil is more expensive, the supply is unlimited, so reasonable use of gas town has great economic significance.
All ships have a shell and an inner shell made of fiberglass reinforced plastics, mainly vinyl esters or epoxy resins. In the process of resin injection, only the German rotary vane vacuum pump is used to separate the mould, because this is the most successful method which has been tested for a long time in daily use. Great importance is attached to the reliability of these powerful vacuum pumps. The boats were built with immersed fibers and a new room was built indoors to ensure the temperature needed to process and dry the resin. For shipyards, it is very important to select only rotary vane vacuum pump for vacuum generation. After all, for this very important process, all ship production must have completely reliable and accurate parameters, and the factors of temperature, time and vacuum must be accurately coordinated.
Rotary vane vacuum pump is widely used in industrial field. In the process of resin pouring, it is important not only that they reach the vacuum level of 0.1 millibar on a continuous basis, equivalent to 99.99% of the vacuum degree, but also that they can produce sufficiently high pumping speed in vacuum. After all, even if the synthetic nucleus is sealed with very precise aluminum foil, the leak may lead to the permeation of a small amount of air, which then needs to be pumped again immediately. High vacuum performance ensures rapid, bubble-free and complete resin infusion. Rotary vane vacuum pump performance can be controlled by throttle valves, for example, if the need to prevent resin flow too fast into the die. This guarantees high quality products and means that the cost of repairs is no longer applicable. Their oil seal function means that the rotary vane vacuum pump is insensitive to the gases generated during drying. These are transported through a vacuum pump without being compressed. A resin trap is connected upstream of each vacuum pump to prevent resin from entering the vacuum pump.
The shipyard said that after the selection of rotary vane vacuum pump in shipbuilding applications, although the vacuum pump in the whole drying process is in operation, but there is no failure or shutdown. As mentioned above, it can be seen that rotary vane vacuum pump is widely used not only in shipbuilding, but also in other fields, such as: food packaging, drying, refrigeration, scientific research, medical, electronic, chemical, pharmaceutical and other professional units and departments of laboratories and laboratories.
2XZ Direct Drive Rotary Vane Vacuum Pump
|Pump speed||50HZ (L/s)||2||4||6||8||15||25|
|Ultimate pressure(Pa)||Partial pressure||6×10ˉ²||6×10ˉ²||5×10ˉ²||5×10ˉ²||5×10ˉ²||5×10ˉ²|
|Oil capacity (L)||0.8||1||1.5||3||3.5||4|