Liquid ring vacuum pump with cavitation regulation
A liquid ring vacuum pump and liquid ring vacuum pump technology, applied in the direction of pump, pump control, pump components, etc., can solve the problem of unutilized performance and capacity, and achieve the effect of saving time and energy
Active Publication Date: 2016-09-21
斯特林工业咨询有限公司
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- Application Information
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Problems solved by technology
Although the pump is thus protected from damage due to cavitation, a part of the possible performance capacity of the pump is not utilized due to the distance from the cavitation limit
Method used
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Embodiment Construction
[0034] exist figure 1 In the liquid ring vacuum pump shown in , the impeller 14 is mounted eccentrically in the pump housing 20 . The liquid within the pump interior is driven by the rotating impeller 14 and forms a liquid ring extending radially inwardly from the outer wall of the pump housing 20 . Taking into account the eccentric mounting, the vanes of the impeller 14 protrude to different depths into the liquid ring depending on the angular position. The volume of the chamber enclosed between the two fins thus changes. The liquid ring thus acts like a piston moving up and down the chamber during the rotation of the impeller 14 .
[0035] A passage leads from the inlet opening 16 into the interior of the pump in which the impeller 14 rotates. The channel 16 opens in the region where the vanes of the impeller 14 emerge from the liquid ring, ie in this region the chamber closed between the two vanes is enlarged. As a result of the enlarged chamber, gas is drawn into the c...
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The present invention relates to a method for operating a liquid ring vacuum pump, wherein vibration measurements of the pump are taken and compared with a prescribed cavitation threshold (26). In addition, measurements are made representative of the liquid content in the gas being transported. Compare this measurement to a specified threshold. If the prescribed cavitation threshold (26) has been exceeded and the liquid composition is below the prescribed threshold, the rotational speed of the liquid ring vacuum pump is reduced. If the specified cavitation threshold has been exceeded and the liquid composition is above the specified threshold, the rotational speed of the liquid ring vacuum pump is increased. The invention also relates to a liquid ring vacuum pump designed for carrying out the method. Due to the regulation depending on the oscillations of the pump according to the invention, it is possible to operate the pump close to the cavitation boundary without any risk of damage.
Description
technical field [0001] The invention relates to a method for operating a liquid ring vacuum pump. In this method, a measured vibration value of the pump is recorded and compared with a predetermined cavitation threshold. Furthermore, the invention relates to a liquid ring vacuum pump suitable for carrying out the method. Background technique [0002] In liquid ring vacuum pumps there is the problem that cavitation can occur in different operating states. If the pump is operated under cavitation conditions for a relatively long period of time, this manifests itself as a high mechanical load on the components of the pump, which can quickly destroy the pump. Previous liquid ring vacuum pumps are therefore designed such that a sufficient distance is always maintained from operating states in which cavitation can occur. Although the pump is thus protected from damage due to cavitation, a part of the possible performance capacity of the pump is not utilized due to the distance ...
Claims
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IPC IPC(8): F04C19/00F04C28/28F04C28/08
CPCF04C19/00F04C28/08F04C28/28F04C25/02F04C2240/81F04C2270/12F04C2270/86F04C2270/44F04C2270/05F04C2270/125F04C2220/10F04C19/004
Inventor 海纳·克斯特斯马蒂亚斯·塔姆丹尼尔·许策
Owner 斯特林工业咨询有限公司