US3700246A - A sealing device for introduction of a vertical rotary shaft through an upper wall of a container or pipe - Google Patents

A sealing device for introduction of a vertical rotary shaft through an upper wall of a container or pipe Download PDF

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Publication number
US3700246A
US3700246A US115560A US3700246DA US3700246A US 3700246 A US3700246 A US 3700246A US 115560 A US115560 A US 115560A US 3700246D A US3700246D A US 3700246DA US 3700246 A US3700246 A US 3700246A
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US
United States
Prior art keywords
vessel
diaphragm
liquid
shaft
gas
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Expired - Lifetime
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US115560A
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English (en)
Inventor
Knut Enarsson
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.)
KAELLE REGULATORER AB
KALLE-REGULATORER AB
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KAELLE REGULATORER AB
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Publication date
Application filed by KAELLE REGULATORER AB filed Critical KAELLE REGULATORER AB
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Classifications

    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid

Definitions

  • ABSTRACT A sealing device for introduction of a vertical rotary shaft through an opening in an upper wall of a container or pipe filled with liquid under pressure, the purpose being to prevent the liquid from contact with a packing box supporting the shaft above said wall.
  • a vessel surrounding a shaft portion below the packing box has a bottom opening coinciding with the opening in said upper wall and dimensioned to receive the shaft with clearance.
  • the upper part of the vessel communicates with a source of pressurized gas through a throttle valve, and a diaphragm inserted in the bottom wall of the vessel is adapted to cause the valve to open for supply of gas when liquid from the underlying container rises above a predetermined level in the vessel.
  • the invention relates to a sealing device for introduction of a vertical rotary shaft through an opening in an upper wall of a container or pipe filled with a liquid under pressure, and its purpose is to prevent the liquid from contact with a packing box which supports the shaft above said wall.
  • a device of the kind mentioned above may be of interest for a consistency meter in which a rotary body to be immersed in a liquid is secured to the lower end of a vertical shaft.
  • the liquid consists of a rather viscous slurry
  • its penetration into the packing box may result in an increased friction which causes a poorer accuracy of the measuring.
  • the slurry contains abrasive particles, such as slurries of china clay in ceramic industries. When such a slurry penetrates into packing boxes and bearings, it causes a rapid wear of parts movable in relation to each other. The difficulty in preventing a penetration is considerably increased, if a slurry flowing through a pipeis influenced by varying overpressures.
  • the problem mentioned above has been solved by means of a substantially closed vessel surrounding a shaft portion below the packing box, said vessel having a bottom opening coinciding with the opening in the upper wall of the container etc. and dimensioned to receive the shaft with clearance.
  • the upper part of the vessel communicates with a source of pressurized gas through a throttle valve, and a diaphragm box inserted in the bottom of the vessel is adapted to cause the valve to open for supply of gas when liquid from the underlying container rises above a predetermined level in the vessel.
  • this consistency meter comprises a vertical motor driven shaft 3 carrying a disk-shaped sensing member 4 at its lower end.
  • the shaft 3 is introduced axially through the top of the cylinder 2 to such a depth that the axis of the pipe 1 extends approximately through the point of gravity of the sensing member 4.
  • Thetop of the cylinder 2 is closed by a ring 5 surrounding the shaft 3with clearance.
  • the upper side of the ring 5 is provided with a circumferential chute 6 which is covered by a horizontal annular diaphragm 7.
  • the ring 5 and the diaphragm 7 form together the bottom of a cylindrical vessel 8 placed over the ring axially in alignment with the lower cylinder 2.
  • the shaft 3 passes through the vessel 8 and is journalled in a packing box 10 which is axially mounted in a cover 9 closing the top of the vessel 8.
  • means 11 may be provided to permit rinsing liquid to pass the packing box 10.
  • the clearance between the shaft 3 and the surrounding ring 5 is dimensioned such that the slurry flowing through the pipe 1 can freely pass into the vessel 8.
  • a diaphragm box 14 mounted outside the vessel 8 is divided into two chambers 13 and 16 by a horizontal diaphragm 15. From the lower chamber 13 a passage 12 extends to the diaphragm chamber formed by the chute 6 and its diaphragm 7. The chamber 6, the passage 12 and the chamber 13 are filled with a neutral liquid, such as a mixture of glycol and water, for example.
  • the upper chamber 16 of the diaphragm box 14 corrununicates with the top of the vessel through a conduit 17. i t
  • a conduit 18 from a source of pressurized air is connected to a passageway 19 extending through the wall of the box 14 to the upper diaphragm chamber 16.
  • the passageway 19 is controlled by a valve which consists of a cone 20 cooperating with an annular seat.
  • the valve cone 20 has a spindle 21 directed downwardly in the chamber 16.
  • the lower end of the valve spindle 21 rests against a lever 22 directed radially within the chamber 16.
  • the lever 22 has one end mounted on a horizontal pivot 23 which is carried by a bracket 24 close to the cylindrical wall of the chamber 16, and the opposite end of the lever 22 rests on a vertical pin 25 projecting from the center of the diaphragm 15.
  • the upper wall of the diaphragm box 14 has a central bore 26 axially in alignment with a'pipe socket 27 connected to the outside of said wall and threaded externally.
  • a cup-shaped cap 28 threaded internally is screwed on the end of the pipe socket 27.
  • a helical spring 29 inserted in the bore 26 has its lower end supported by a bracket 30 which is mounted centrally of the diaphragm 15.
  • the bracket 30 carries a pin 31 serving as a guide for the end of the spring 29, and another pin 32 directed downwardly from the inside of the cap 28 engages the upper end of the spring 29.
  • the device described operates in the following manner.
  • the liquid in the pipe 1 issubjected to an overpressure it rises into the vessel 8, where the liquid column causes a depression of the diaphragm 7.
  • the diaphragm 15 in the box 14 is raised and moves the arm 22 upwards so that the valve 20 is opened to increase the air pressure in the upper diaphragm chamber 16 and thus in. the vessel 8.
  • the increased air pressure thus acting on the upper sides of both diaphragms 7,15 prevents the liquid level from rising further in the vessel 8.
  • Some liquid may be pressed back from the vessel 8 into the pipe 1 through the clearance between the shaft 3 and the ring 5. Equilibriurn has been reached when the liquid level in the vessel a is constant.
  • the diaphragm has then returned to a position in which the air valve has been throttled or entirely closed.
  • the liquid level in the vessel 8 may be adjusted by turning the screw cap 28 so that the spring 29 imparts the required pretension to the diaphragm 15.
  • a vent 33 provided on the upper part of the vessel 8 and preferably dimensioned to blow off an amount of air at least equal to that which may enter at a maximum leakage in the air valve 20. Because of the vent 33 the valve 20 must, of course, always be slightly open to compensate for the loss of air, but the amounts of air consumed in this way would cartainly be rather small.
  • said linkage means includes an adjustable resilient member mounted to subject said second diaphragm to a predetermined bias against the fluid in said closed fluid chamber.
  • the sealing device of claim 1 including vent means in said upper portion of said vessel for relieving excessive gas pressure therein from leakage of said throttle valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Lift Valve (AREA)
  • Sealing Devices (AREA)
  • Mechanical Sealing (AREA)
US115560A 1970-03-25 1971-02-16 A sealing device for introduction of a vertical rotary shaft through an upper wall of a container or pipe Expired - Lifetime US3700246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE04162/70A SE332311B (enrdf_load_stackoverflow) 1970-03-25 1970-03-25

Publications (1)

Publication Number Publication Date
US3700246A true US3700246A (en) 1972-10-24

Family

ID=20263655

Family Applications (1)

Application Number Title Priority Date Filing Date
US115560A Expired - Lifetime US3700246A (en) 1970-03-25 1971-02-16 A sealing device for introduction of a vertical rotary shaft through an upper wall of a container or pipe

Country Status (7)

Country Link
US (1) US3700246A (enrdf_load_stackoverflow)
CA (1) CA928735A (enrdf_load_stackoverflow)
DE (1) DE2113565A1 (enrdf_load_stackoverflow)
FR (1) FR2083584A1 (enrdf_load_stackoverflow)
GB (1) GB1309705A (enrdf_load_stackoverflow)
SE (1) SE332311B (enrdf_load_stackoverflow)
SU (1) SU522821A3 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938832A (en) * 1974-11-01 1976-02-17 American Cyanamid Company Packing gland for TiCl4 inlet to oxidizer reactor
US4460181A (en) * 1980-06-26 1984-07-17 Toyo Denki Kogyosho Co., Ltd. Method and mechanism for controlling the pressure at shaft-sealing part of an apparatus
DE3843429A1 (de) * 1988-12-23 1990-06-28 Klein Schanzlin & Becker Ag Wellenabdichtung an stroemungsmaschinen
US5513556A (en) * 1993-11-30 1996-05-07 Schaefer; Kenneth A. Packing gland construction
US6553963B1 (en) * 2000-10-17 2003-04-29 Bombardier Motor Corporation Of America Throttle assembly with oil seal bushing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1332932C (en) * 1987-09-04 1994-11-08 Joseph Anthony Herbst Crystalline porous silicate composite and its use in catalytic cracking
AT516405B1 (de) * 2015-03-11 2016-05-15 Anton Paar Gmbh Drehrheometer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296542A (en) * 1940-08-01 1942-09-22 Smith Meter Company Spindle packing for meters and the like
US3115347A (en) * 1961-08-22 1963-12-24 Nettco Corp Container having means for preventing escape of fluid therefrom where a shaft enters the same
US3157128A (en) * 1962-04-19 1964-11-17 Hustinx Edmond Liquid pump having gas-cushioned bearing means
US3328039A (en) * 1965-02-08 1967-06-27 Ite Circuit Breaker Ltd Leak-proof seal
US3883214A (en) * 1972-06-14 1975-05-13 Westinghouse Electric Corp Protective anti-reflective coatings for alkali-metal halide optical components

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296542A (en) * 1940-08-01 1942-09-22 Smith Meter Company Spindle packing for meters and the like
US3115347A (en) * 1961-08-22 1963-12-24 Nettco Corp Container having means for preventing escape of fluid therefrom where a shaft enters the same
US3157128A (en) * 1962-04-19 1964-11-17 Hustinx Edmond Liquid pump having gas-cushioned bearing means
US3328039A (en) * 1965-02-08 1967-06-27 Ite Circuit Breaker Ltd Leak-proof seal
US3883214A (en) * 1972-06-14 1975-05-13 Westinghouse Electric Corp Protective anti-reflective coatings for alkali-metal halide optical components

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938832A (en) * 1974-11-01 1976-02-17 American Cyanamid Company Packing gland for TiCl4 inlet to oxidizer reactor
US4460181A (en) * 1980-06-26 1984-07-17 Toyo Denki Kogyosho Co., Ltd. Method and mechanism for controlling the pressure at shaft-sealing part of an apparatus
DE3843429A1 (de) * 1988-12-23 1990-06-28 Klein Schanzlin & Becker Ag Wellenabdichtung an stroemungsmaschinen
US5513556A (en) * 1993-11-30 1996-05-07 Schaefer; Kenneth A. Packing gland construction
US6553963B1 (en) * 2000-10-17 2003-04-29 Bombardier Motor Corporation Of America Throttle assembly with oil seal bushing

Also Published As

Publication number Publication date
SU522821A3 (ru) 1976-07-25
FR2083584A1 (enrdf_load_stackoverflow) 1971-12-17
SE332311B (enrdf_load_stackoverflow) 1971-02-01
GB1309705A (en) 1973-03-14
CA928735A (en) 1973-06-19
DE2113565A1 (de) 1971-10-14

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