Pumps – One fluid pumped by contact or entrainment with another – Contact or entrainment within rotary impeller
Patent
1990-12-13
1992-06-16
Bertsch, Richard A.
Pumps
One fluid pumped by contact or entrainment with another
Contact or entrainment within rotary impeller
418100, F04C 1900
Patent
active
051220350
DESCRIPTION:
BRIEF SUMMARY
The object of the invention is a liquid ring compressor and vacuum pump.
The known liquid ring compressor has a casing with a rotor inside, mounted off-centre. The casing contains liquid which is caused by the centrifugal force of the rotor to rotate along the periphery of the casing. Since the rotor is mounted off-centre, the inner surface of the liquid ring moves up and down in the rotor vane slots as the rotor turns. The slots are connected to the gas inlet when the liquid ring moves outwards, away from the bottom of slot. The slots are connected to the outlet when the distance between the liquid ring and the bottom of the slot is at a minimum. During the compression phase the opening at the bottom of the slot is closed whereupon the liquid penetrating the slot compresses the gas. Since small amounts of liquid leave the compressor along with the gas, a corresponding amount has to be continuously replaced.
Liquid ring compressors are used in the processing industry, in particular for transferring large amounts of gas. These pumps are particularly useful when the gas contains solid impurities.
One liquid ring compressor is presented in the publication U.S. Pat. No. 3,154,240.
The known liquid ring compressors have an in-built, essentially constant pressure ratio. This implies a need for extra power when the compressor is operated at a pressure ratio deviating from the design value. Furthermore, a constant pressure ratio causes problems when starting the pump, if there is no pressure difference between the inlet and the outlet.
Now the liquid ring compressors will be defined more closely.
The rotor of the now-invented liquid ring compressor is equipped with a flange to which the vanes are attached. At the opposite end, the vanes are connected to each other with a ring flange. The gas to be compressed is led from the compression zone of the rotor to a walled-off annular space, between the axle and rotor and from there to the outlet.
One of the characteristics of the invention is that, preceding the actual discharge, there are in the walls of the annular space a number of intermediate outlets equipped with a valve.
One of the characteristics of the invention is that the compressor casing is a drum rotating in the same direction as the rotor.
One of the characteristics of the invention is that vanes become separated from the liquid ring at the induction zone.
One of the characteristics of the invention is that the compressor is equipped with a cooling system with which liquid coolant can be injected into the vane slots.
One of the characteristics of the invention is that there is an interconnection equipped with a valve from the outlet side of the compressor to the inlet side.
One of the characteristics of the invention is that there are guide plates in the casing outside the rotor.
One of the characteristics of the invention is that the slots in the induction phase are connected via grooves to the induction chamber.
Some of the advantageous characteristics of the invention are described in detail below. The schematic figures are side projections in which
FIG. 1 displays a liquid ring compressor as per the invention, as seen parallel to the axle, i.e. from the front,
FIG. 2 is an alternative detail of the compressor in FIG. 1 as seen from the front,
FIG. 3a displays another compressor as per the invention, as seen from the side,
FIG. 3b shows the compressor in FIG. 3a as seen from the front,
FIG. 4 is a magnification of a detail from FIG. 3a,
FIG. 5 shows a third compressor as per the invention as seen from the front,
FIG. 6 shows a fourth compressor as per the invention as seen from the side,
FIG. 7 shows a fifth compressor as per the invention as seen from the front,
FIG. 8 shows the connections of compressors as per the invention.
The liquid ring compressor shown in FIG. 1 has a fixed cylindrical casing 1, and the casing a rotor 6 placed on an eccentrically moving axle 5. The rotor has an end flange to which the vanes 8, which are parallel to the axle, are attached. The other ends of the vanes 8 are connec
REFERENCES:
patent: 953222 (1910-03-01), Nash
patent: 1668532 (1928-05-01), Stewart
patent: 2937499 (1960-05-01), Klemt
patent: 3154240 (1964-10-01), Jennings
patent: 3366314 (1965-10-01), Schroder
patent: 3395854 (1968-08-01), Martin et al.
patent: 3721508 (1973-03-01), Mugele
patent: 4172694 (1979-10-01), Haavik
patent: 4422832 (1983-12-01), Haavik
patent: 4498844 (1982-02-01), Bissell et al.
patent: 4565498 (1986-01-01), Schmid et al.
patent: 4747752 (1988-05-01), Somarakis
patent: 4861246 (1989-08-01), Zimmern
Bertsch Richard A.
Kocharov Michael I.
Pentamo Oy
LandOfFree
Liquid ring compressor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid ring compressor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid ring compressor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1750262