JPH03145593A - Liquid ring vacuum pump insensible to contaminated liquid - Google Patents

Abstract

PURPOSE: To efficiently discharge contaminated liquids by providing a liquid ring on the outside of a cylindrical rotor which rotates eccentrically within a round housing space, dividing the housing space into a suction chamber and a pressure chamber, and forming a ring channel in the rotor. CONSTITUTION: A rotor 1a is eccentrically mounted at one end of a shaft 2 freely rotationally supported against a housing 4 having a suction-side inlet 5 and a pressure-side radial outlet 6. A liquid ring 7 is provided in the internal space of the housing 4 and between the housing 4 and a rotor channeled base 8 in such a way as to rotate while forming a sickle-shaped space 9 and forming a sealing zone 10 on the opposite side. Thereby the internal space of the housing is divided into a suction chamber 13 and a pressure chamber 14. The rotor 1a is provided with a barrier plate 17 and communicated with the pressure chamber 14 via a passage 18 at the front of the barrier 17 and with the suction chamber 13 via a passage 19 at the rear of the barrier 17, and a liquid-ring pickup blade 20 is provided on a channeled side wall.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to liquid ring vacuum pumps, and more particularly to liquid ring vacuum pumps that are insensitive to contaminated liquids.

[Conventional technology]

A liquid ring vacuum pump having an eccentrically rotating rotor, provided in a housing with a circular interior, and provided with a member for rotating the liquid in the housing and forming a rotating ring, which is fixed by the eccentric arrangement of the rotor. In one position it cooperates with the housing, thereby forming a local seal, and in another position it creates a space of sickle-shaped cross-section between the rotor surface and the inside diameter of the liquid, in which a member provided on the rotor A liquid ring vacuum pump is a well-known construction in which a liquid ring vacuum pump creates a space which divides the space into cells into which the trapped gas is taken and conveyed from the suction side to the pressure side of the pump. are divided into two groups.

A system for forming a sealing gap with a small play between the housing wall on the suction side and the housing wall on the pressure side with respect to the rotor and the blades is suitable only for pure liquids and is described in the following patents: P28893, D, R, P
No. 56529.

2: A system with worm drive blades mounted on the rotor moves the space required to transport gas axially between the worm drive walls without relying on tight sealing gaps on the sides. , permitting the use of dirty liquids. The following patent D883°565, U, 3.2280.
No. 100, UK.

No. 1425997.

The disadvantage over system 1 is that the axial movement caused by the worm drive drive develops a perturbation of the liquid ring, leading to energy loss and instability inside the inner diameter of the liquid ring. . EPOI
11653A2, attempts to counter the axial flow by precautions have only mitigated rather than prevented it.

[Problem to be solved by the invention]

The present invention does not create a mechanical axial flow in the water ring, and since there is no narrow gap, the soiled liquid
1iquids).

SUMMARY OF THE INVENTION The present invention is characterized by an eccentric rotor mounted on a pump housing with a continuous groove around its outer periphery. A septum is included in the grooved channel that prevents endless channel passage. A transverse opening on the front side of the partition with respect to the direction of rotation connects the channel groove with the rotor in the housing space on the pressure side, and a rear transverse opening in the partition with the suction side of the housing space. The suction side and the pressure side of the housing space communicate with the inlet and outlet openings of the pump, respectively. In the groove transverse surfaces, for example small vanes, are applied to the walls of the groove with periodic gaps. and such that a sufficient cross-sectional area of the groove is ensured for the gas flow in the groove, and a sickle-shaped space towards the liquid ring is set up in the rotor groove - to the co-spinning liquid ring. It provides sufficient space for power transmission.

The bulkhead now moves through the sickle-shaped space, forcing the gas contained in the space in front of it towards a transverse opening in the pressure chamber, from which it passes through an opening near the center of rotation. until it reaches the pump outlet. At the same time, gas is drawn into the space from the suction chamber through the rear transverse opening.

Let's follow one cycle of operation. There, the groove partition crosses the sickle-shaped space and then the sealing section, and the liquid ring contacts the rotor groove base once per revolution, causing a pulsating transport of gas.

A more balanced delivery is achieved if the pump is of the multiple flood type, having several parallel and close grooves around the rotor, guiding the gas maze from one groove to another and from the suction chamber to the pressure chamber. is achieved.

To obtain a high vacuum, the pump can also be made multistage with parallel labyrinth-shaped rotor grooves.

Finally, the two above principles can also be combined into a multi-flood type and multi-stage water ring type vacuum pump.

〔Example〕

The invention will be explained in detail with reference to the accompanying drawings.

The rotor 1a of the shaft 2 is eccentrically mounted on a support base 3, only one side of which is shown. The support 3 is provided on a pump with a housing 4 having an inlet 5 on the suction side and a radial outlet 6 on the pressure side. In the interior space of the housing, a liquid ring 7 rotates forming a sickle-shaped space 9 between it and the rotor channel base 8 while forming a sealing zone 10 on the opposite side. Channel side wall 1
1 defines a space 9 in the axial direction. The rotor profile is immersed on its entire circumference in a liquid ring, thus sealing the rotor channel and at the same time leaving a space inside the housing with a suction chamber 13 connected to the artificial opening and a pressure outlet chamber connected to the outlet 6 instead. It is divided into a pressure chamber 14 connected to a pressure chamber 15. The support base is protected against the pump by a seal 16. The partition 17 prevents the infinity of the rotor channel, so that on the front side of the partition this channel leads to the pressure chamber 14 through a passage 18 through the side wall of the channel and on the rear side of the partition with a passage 19 to the suction chamber 13.

Liquid ring pickup vanes 20 are attached to the channel sidewalls.

Rotor 1b is illustrated as a double flood/two stage pump. The rotor has four channels 1 to 1, which are partially connected to each other and to the suction chamber 13 and the pressure chamber 14, thereby forming partitions 17a to 17h, passages a1 to el, a2 to e2. and side walls 11 form a maze system.

Flood passage 1 passes through sickle-shaped space 911 to 91■1,
The flooding passage 2 passes from the space 912 through 9rV2.

channel? The diameter of the channel from n T to ■ matches the inner diameter of the water ring as the pressure increases.

The illustrated pump operates as follows.

The single stage pump of FIG. 1 is the simplest arrangement of the invention. The sickle-shaped space 9 defined by the bottom diameter 8 of the channel groove, the side walls 11 and the liquid ring 7 is periodically connected to the gas by a passage 19 located in the suction chamber 13. The partition wall 17 moving through the space 9 enlarges the part of the space on the suction side and thus absorbs gas from the inlet 5 through the suction chamber 13 and the passage 19.

The gas trapped in the previous cycle in the space in front of the partition is compressed and conveyed through the passage 18 via the pressure chamber 14 and the outlet chamber 15 to the outlet 6 of the pump. Small vanes l120 on the channel side assist in the rotational movement of the liquid ring. All parts convey only radial components to the liquid ring, thus resulting in less energy wastage and a more stable inner contour of the water ring, minimizing water consumption for operation.

The double-flood, two-stage pump of FIG. 3 initially operates as in FIG. 1, whereby rotor 1b has four parallel channels I to ■, whereby two Pulsating gas flows 1 and 2 flow from the suction chamber 13 to the pressure chamber 14/
J 1-911-b 19111-cl-9I[1l-
di-9rV1-el, or a2-9 [2-b
2-9112-c2-91[12-d2-91V2-e
2 respectively and superimpose a 180'' phase displacement on each other, thereby smoothing out the pulsations.

[Brief explanation of the drawing]

Figure 1 is an axial sectional view of a single-flood type, single-stage pump, Figure 2 is a plan view of the rotor and water ring seen from the suction side, and Figure 3 is a diagram of a double-flood type, two-stage pump. The same axial sectional view as in FIG. 1; FIGS. 4 to 8 are cross-sectional views of a channel stage with the same rotor and liquid ring in the rotational position of the rotor, as seen from the suction side. 1a... Rotor, 7... Liquid ring, 9... Sickle-shaped space, ■ 3... Suction chamber, 4... Pressure chamber, ■ 7... Partition wall, 8... To pressure chamber 9... Passage to the suction chamber, 20... Vane.

Claims (3)

[Claims] (1) A liquid ring pump with a cylindrical rotor that rotates eccentrically within a round housing space, the outer side of which rotor cooperates with a ring of water that rotates together, and in this way the housing space is transformed into a suction chamber. A ring channel is provided on the outer surface of the rotor, which is separated by a partition wall and has a channel passage to the pressure chamber on the front side and a channel passage to the suction chamber on the rear side as seen in the rotation direction. A liquid ring vacuum pump that is insensitive to contaminated liquids. (2) A liquid ring vacuum insensitive to contaminated liquids according to claim 1, characterized in that small vanes for pulsating the water ring are attached to the surface of the ring channel at a distance from each other. pump. (3) Several ring channels are close to and parallel to each other on the outer surface of the rotor and are interconnected by passages through their separating walls, so that the pump is of the multi-flooded type (mul
ti-flooded), multi-stage type (multi-sta
A liquid ring vacuum pump insensitive to contaminated liquids according to claim 1 or 2, characterized in that it is connected in a multi-flood type, or in a multi-flood type.