GB2476118A - Liquid ring vacuum pump with a rotatable casing and gas bearing - Google Patents

Liquid ring vacuum pump with a rotatable casing and gas bearing Download PDF

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Publication number
GB2476118A
GB2476118A GB0921808A GB0921808A GB2476118A GB 2476118 A GB2476118 A GB 2476118A GB 0921808 A GB0921808 A GB 0921808A GB 0921808 A GB0921808 A GB 0921808A GB 2476118 A GB2476118 A GB 2476118A
Authority
GB
United Kingdom
Prior art keywords
cover
casing
vacuum pump
liquid ring
ring vacuum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0921808A
Other versions
GB0921808D0 (en
Inventor
Chen-Tan Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CUTES CORP
Original Assignee
CUTES CORP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CUTES CORP filed Critical CUTES CORP
Priority to GB0921808A priority Critical patent/GB2476118A/en
Publication of GB0921808D0 publication Critical patent/GB0921808D0/en
Publication of GB2476118A publication Critical patent/GB2476118A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/002—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids with rotating outer members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/001—Radial sealings for working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2220/00—Application
    • F04C2220/10—Vacuum

Abstract

A liquid ring vacuum pump is disclosed having a cylindrical cover 11 containing liquid, a casing 12 rotatably mounted in the cover, a driving shaft 30, a rotor 40 and a gas bearing. The gas bearing is defined between the cover and the casing by compressed air 50 being forced through restrictive orifices 111 to the space between the facing surfaces of the cover 11 and the casing 12 to keep the cover 11 and the casing 12 apart, the gas then outflows via the vent holes 112. The driving shaft 30 is mounted eccentrically through the cover 11. The rotor (40) is mounted securely around the driving shaft 30 and is mounted in the cover 11. When the rotor is turned, the liquid is rotated and drives the casing (12) to rotate to give low friction and excellent control. The casing may have multiple ball bearings 20 attached to the cover adjacent the surface of the casing.

Description

LIQUID RING VACUUM PUMP WITH A ROTATABLE CASING
I. Field of the Invention
The present invention relates to a liquid ring vacuum pump, and more particularly to a liquid ring vacuum pump with a rotatable casing and having a gas bearing for smooth operation.
2. Description of the Prior Arts
Liquid ring vacuum pumps are widely used in industry and are used as vacuum pumps or gas compressors. With reference to Figs. 2 and 3, a conventional liquid ring vacuum pump comprises a cylindrical cover (63), casing (64), multiple ball bearings (65), a driving shaft (70) and a rotor (80).
The cover (63) has at least one inlet (61) and at least one outlet (62) and contains liquid therein such as water or oil. The casing (64) is rotatably mounted in the cover (63), The ball bearings (65) arc respectively attached to the cover (63) and contact the casing (64). The driving shaft (70) is mounted eccentrically through the cover (63) and is connected to a motor. The rotor (80) is mounted securely around the driving shaft (70), is mounted in the cover (63) and has multiple chambers (81).
In operation, the rotor (80) is rotated by the driving shaft (70). The liquid such as water or oil is filled in the cover (63) and the casing (64) and is rotated by the rotor (80) to form a liquid ring around the inside wall of the casing (64) and the rotating liquid rotates the casing (64). Since the driving shaft (70) is mounted eccentrically through the cover (63), the rotor (80) is rotated eccentrically in the cover (63). Therefore, different parts of the rotor (80) have different length contacting with the liquid ring. Parts of the rotor (80) insert shallowly into the liquid ring to allow the liquid leaving the corresponding chambers (81) and to absorb gas through the inlet (61).
Meanwhile, other parts of the rotor insert deeply into the liquid ring to absorb liquid in the corresponding chambers (81) and to push gas away through the outlet (62). Thus, the vacuum effect is achieved.
Besides, the ball bearings (65) mounted between the cover (63) and the easing (64) can reduce the friction between the easing (64) and cover (63).
However, the ball bearings (65) in high cycle operations need periodic lubrication and cleaning otherwise the friction between the cover (63) and easing (64) becomes larger and the actuation efficiency is reduced. Therefore, to develop a liquid ring vacuum pump with a better way to reduce friction is needed, The main object of the present invention is to provide a liquid ring vacuum pump with a rotatable easing to reduce friction and improve actuation quality.
A liquid ring vacuum pump with a rotatable easing has a cylindrical cover, a casing, a gas bearing, compressed air> a driving shaft and a rotor. The cover contains liquid. The easing is rotatably mounted in the cover. The gas bearing is defined between the cover and the casing by the compressed air being forced in between the cover and the casing to keep the cover and the easing apart. The driving shaft is mounted eccentrically through the cover. The rotor is mounted securely around the driving shaft and is mounted in the cover.
So the liquid is rotated by the rotor and drives the casing to rotate as well to give lo\v friction and excellent control.
JN THE DRAWINGS: Fig. 1 is a side view in partial section of a liquid ring vacuum Un with a rotatable casing in accordance with the present invention; Fig. 2 is a side view in partial section of a conventional liquid ring
vacuum pump in accordance with the prior art; and
Fig. 3 is a front view of the conventional liquid ring vacuum pump in Fig. 2.
With reference to Fig. 1, a liquid ring vacuum pump with a rotatable casing in accordance with the present invention comprises a cylindrical cover (11), a easing (12), a gas bearing, compressed air (50), multiple ball bearings (20), a driving shaft (30) and a rotor (40).
The cover (11) contains liquid therein and has multiple restrictive orifices (111), multiple vent holes (112) and a surface (113). The restrictive orifices (111) and the vent holes (112) are separately mounted through the cover (11).
The easing (12) is rotatably mounted in the cover (11) and has a surface (121) facing the surface (113) of the cover (11). A gap is defined between the surfaces (113, 121) of the cover (11) and the casing (12).
The gas bearing is defined between the cover (11) and the casing (12) by the compressed air (50) being forced in between the cover (11) and the easing (12) to keep the cover (ii) and the casing (12) apart.
The ball bearings (20) are respectively attached to the cover (11) and are adjacent to the surface (121) of the casing (12).
The driving shaft (30) is mounted eccentrically through the cover (11) and is connected to a motor.
The rotor (40) is mounted securely around the driving shaft (30) and is mounted in the cover (11).
When the liquid ring vacuum pump in accordance with the present invention is operated, the rotor (40) and the liquid is rotated around the inside of the casing (12) by means of the centrifugal force. The compressed air (50) is forced in between the surfaces (113,121) of the cover (11) and the casing (12) via the restrictive orifices (111) and keeps the cover (11) and the casing (12) apart and then outflows via the vent hoLes (112). A gap is formed between the cover (11) and the casing (12) when the compressed air (50) is inputted.
Because of the gas bearing, the Motion between the cover (11) and casing (12) is decreased. Therefore, the liquid ring vacuum pump is efficient and smoother for greater control.
Besides, a gap is formed between the surface (121) of the casing (]2) and the ball bearings (20) when the compressed air (50) is inputted. When the compressed air (50) is non-inputted or the casing (12) is slow down, the surface (121) of the casing (12) contacts some of the ball bearings (20) by gravity. The bail bearings (20) allows the casing (12) to stop smoothly for buffering capacity.

Claims (3)

  1. CLAIMS: 1. A liquid ring vacuum pump with a rotatable casing comprising: a cylindrical cover (11) containing liquid therein and having mu]tiple restrictive orifices (111), multiple vent holes (112) and a surface (113); and a casing (12) rotatably mounted in the cover (11) and having a surface (121) facing the surface (113) of the cover (11) and a gap defined betwccn the surfaces (113,121) of the cover (11) and the easing (12); a gas bearing defined between the cover (11) and the casing (12) by compressed air (50) being forced in between the cover (11) and the casing (12) via the restrictive orifices (111) to keep the cover (11) and the casing (12) apart and then outfiowing via the vent holes (112); a driving shaft (30) mounted eccentrically through the cover (II) and connected to a motor; and a rotor (40) mounted securely around the driving shaft (30) and mounted in the cover (11).
  2. 2. The liquid ring vacuum pump with a rotatable casing as claimed in claim I further having multiple ball bearings (20) respectively attached to the cover (11) adjacent to the surface (121) of the casing (12).
  3. 3. The liquid ring vacuum pump with a rotatable casing as claimed in claims 1 or 2 wherein the restrictive orifices (111) and the vent holes (112) are separately mounted through the cover (11).
GB0921808A 2009-12-14 2009-12-14 Liquid ring vacuum pump with a rotatable casing and gas bearing Withdrawn GB2476118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0921808A GB2476118A (en) 2009-12-14 2009-12-14 Liquid ring vacuum pump with a rotatable casing and gas bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0921808A GB2476118A (en) 2009-12-14 2009-12-14 Liquid ring vacuum pump with a rotatable casing and gas bearing

Publications (2)

Publication Number Publication Date
GB0921808D0 GB0921808D0 (en) 2010-01-27
GB2476118A true GB2476118A (en) 2011-06-15

Family

ID=41667048

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0921808A Withdrawn GB2476118A (en) 2009-12-14 2009-12-14 Liquid ring vacuum pump with a rotatable casing and gas bearing

Country Status (1)

Country Link
GB (1) GB2476118A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107061313A (en) * 2017-06-19 2017-08-18 高博 A kind of liquid-ring vacuum pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263504A (en) * 1992-01-22 1993-07-28 Nash Engineering Co Liquid ring pumps
GB2279702A (en) * 1993-01-14 1995-01-11 Nash Engineering Co Liquid ring pumps with rotating liners
EP0694695A1 (en) * 1994-07-26 1996-01-31 The Nash Engineering Company Supports for rotatable housings of liquid ring pumps
GB2305694A (en) * 1995-09-26 1997-04-16 Nash Engineering Co Liquid ring pump with fluid bearing pads
US20040094722A1 (en) * 1999-04-19 2004-05-20 Asml Netherlands B.V. Gas bearings for use with vacuum chambers and their application in lithographic projection apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263504A (en) * 1992-01-22 1993-07-28 Nash Engineering Co Liquid ring pumps
GB2279702A (en) * 1993-01-14 1995-01-11 Nash Engineering Co Liquid ring pumps with rotating liners
EP0694695A1 (en) * 1994-07-26 1996-01-31 The Nash Engineering Company Supports for rotatable housings of liquid ring pumps
GB2305694A (en) * 1995-09-26 1997-04-16 Nash Engineering Co Liquid ring pump with fluid bearing pads
US20040094722A1 (en) * 1999-04-19 2004-05-20 Asml Netherlands B.V. Gas bearings for use with vacuum chambers and their application in lithographic projection apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107061313A (en) * 2017-06-19 2017-08-18 高博 A kind of liquid-ring vacuum pump

Also Published As

Publication number Publication date
GB0921808D0 (en) 2010-01-27

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)