RU2322615C1 - Two-stage liquid-ring machine - Google Patents

Abstract

FIELD: mechanical engineering; pumps and compressors.

SUBSTANCE: proposed two-stage liquid-ring machine contains housings of first and second stages, end face covers and drive shaft. Sectional design working wheel is common for two stages. Housing of second stage is arranged with eccentricity relative to axis of machine. Places where blades pass second stage housing are provided with hinged seals. Housing are rotated by drive shaft of second stage.

EFFECT: reduced overall dimensions, increased capacity and efficiency and reduced consumption of energy for evacuation.

2 dwg

Description

The invention relates to a pump-compressor industry and can reduce the size, increase productivity, efficiency and reduce energy costs for the vacuum process.

An analog is a two-stage liquid-ring machine containing a housing, end caps with discharge and suction windows for a gaseous medium, two impellers with blades located in a housing with an eccentricity (E.S. Frolov, I.A. Avtononova, V.I. Vasiliev et al. “Mechanical vacuum pumps.” - M.: “Mechanical Engineering.” 1989, 192 p.).

The disadvantages of the design of a two-stage liquid-ring machine are significant dimensions, relatively low productivity, low efficiency and increased energy costs for the vacuum process.

The prototype is a multi-stage liquid-ring machine containing a housing with suction and discharge nozzles, internal and external rotors with vanes eccentrically placed in it, the internal rotor mounted on the shaft and the external rotor with the possibility of its coverage, end caps with suction and discharge windows for each rotor, which, in order to reduce dimensions and increase efficiency, is equipped with at least one intermediate rotor with blades and bandages mounted on the blades of the inner and intermediate weft rotors, while the inner and intermediate rotors are kinematically connected to each other by gearing made on the outer surface of the bandages and the inner surface of the rotors, the suction pipe is in communication with the suction window located in the outer rotor zone, the discharge pipe is with the discharge window located in the zone internal rotor (US Pat. RF No. 1562528, CL F04C 19/00, 7/00).

The disadvantage of this design is the irrational use of interscapular space due to the presence of a liquid ring in the second stage (in relation to the two-stage design of the prototype).

The technical task is to create a design of a two-stage liquid-ring machine with steps placed one in the other, the second stage having no liquid ring, and the tightness in the interscapular space is achieved using hinged seals, which leads to a decrease in size, increase productivity, efficiency and lower energy costs for the evacuation process.

The solution to the technical problem lies in the fact that the two-stage liquid-ring machine contains the bodies of the first and second stages, end caps and a drive shaft, the impeller being prefabricated and is common to two stages, and the body of the second stage is eccentric with respect to the axis of the machine, places the passage of the blades of the housing of the second stage are equipped with hinged seals, while the rotation is carried out from the drive shaft of the second stage.

The invention is illustrated by drawings. Figure 1 shows a two-stage liquid ring machine, a longitudinal section; figure 2 is a section aa in figure 1.

A two-stage liquid-ring machine (Fig. 1, 2), comprising the housing: 1 - first and installed with an eccentricity relative to it 2 - second steps, a fixed shaft 3 and an impeller, consisting of seals 4 and movably mounted on the shaft of the blades 5, passing with the help of hinged seals 6 through the second stage housing, as well as the end cover 7 with suction 8, 9 and injection 10, 11 windows, supply 12 and exhaust 13 pipelines and cover 14. V-belt drive 15 and fr are mounted on the drive shaft of the second stage housing ktsionnaya transmission 16. Housings of the first and second stages mounted in end plates 17 by bearings 18 and seals 19, 20, the cover 21 are tightened the pins, the space between the end caps 22 closed casing.

The design works as follows: when the drive shaft of the second stage housing 2 is rotated due to V-belt 15 and friction 16 gears, the housing 1 is rotated, while the supplied fluid forms a ring sealing the interscapular space of the first stage due to centrifugal forces, organizing the pumping of the gas phase from the supply the pipe 12 and the suction window 8 to the discharge window 10; the blades 5 passing through the hinge seals 6 of the housing 2 transmit rotation to the impeller mounted on the fixed shaft 3, which leads to the pumping of the gas phase in the second stage from the suction window 9 to the discharge window 11 and the exhaust pipe 13, thereby organizing a two-stage pumping process . To seal the interscapular space of the first stage, a liquid ring and seals 19 are used, and the housing 1 is rotated using bearings 17, the second stage for these purposes has hinged seals 6, a seal 20 and a bearing 18, which allows the gas phase to be pumped into the second stage without liquid rings.

Claims (1)

A two-stage liquid ring machine comprising first and second stage housings, end caps and a drive shaft, characterized in that the impeller is prefabricated and is common to two stages, the second stage housing being eccentric with respect to the axis of the machine, the passageway with the second body blades the stages are equipped with hinged seals, while the rotation of the bodies is carried out from the drive shaft of the second stage.

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