US20050087935A1 - Externally mountable spiral adaptor - Google Patents

Externally mountable spiral adaptor Download PDF

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Publication number
US20050087935A1
US20050087935A1 US10/498,812 US49881204A US2005087935A1 US 20050087935 A1 US20050087935 A1 US 20050087935A1 US 49881204 A US49881204 A US 49881204A US 2005087935 A1 US2005087935 A1 US 2005087935A1
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United States
Prior art keywords
adaptor
annular
spiral
bore
shaft
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.)
Abandoned
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US10/498,812
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English (en)
Inventor
Paul Hughes
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.)
Enviroseal Engineering Products Ltd
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Individual
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Filing date
Publication date
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Assigned to ENVIROSEAL ENGINEERING PRODUCTS LTD. reassignment ENVIROSEAL ENGINEERING PRODUCTS LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUGHES, PAUL
Publication of US20050087935A1 publication Critical patent/US20050087935A1/en
Priority to US11/606,032 priority Critical patent/US7314218B2/en
Abandoned legal-status Critical Current

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    • 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
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/189—Means for facilitating the removal of the packing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • 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
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/182—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with lubricating, cooling or draining means
    • F16J15/183—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with lubricating, cooling or draining means using a lantern ring
    • 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
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
    • 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
    • F16J15/406—Sealings between relatively-moving surfaces by means of fluid by at least one pump

Definitions

  • the present invention relates to an adaptor that can be used with rotatable fluid equipment, such as pumps, and which will protect mechanical seals and packing adjacent a seal cavity of the equipment.
  • Spiral throat bushings are available from EnviroSeal Engineering Products Ltd. of Waverley, Nova Scotia, Canada under the SpiralTracTM name.
  • These patented devices (U.S. Pat. No. 5,553,868) have a spiral groove formed in a sloping face thereof and are generally positioned at the “bottom” of a seal cavity defined in part by a rotating shaft, a shaft housing, and a throat structure.
  • the seal cavity typically, as well, may be filled with conventional packing or it may include a mechanical seal adjacent the end opposite the throat structure.
  • These spiral bushings are intended to remove particulate material that may accumulate within the seal cavity during operation of the equipment, and may be augmented by flush fluids to help in material removal. The result of using these “internal” spiral throat bushings has been increased seal or packing life due to a significant reduction in wear.
  • Mechanical seals are designed to prevent leakage of process fluid to atmosphere, and are typically offered in a split or solid cartridge design.
  • the seal is fastened to the face of the seal cavity housing by some mechanical means, such as threaded bolts or rods. The operation of the rotating equipment could be enhanced further if there was less particulate material entering the seal cavity from the vicinity of the mechanical seal.
  • Packing material is typically provided in annular rings and one or more such packing rings can be placed in a seal cavity and surrounding the rotating shaft. Again, operation of rotating equipment could be enhanced further if there were less particulate material entering the seal cavity past or from the vicinity of such packing material
  • the advantage to this arrangement is that with the spiral adaptor being located closer to the sealing mechanism the existing patented technology of the bushing or adaptor will protect the sealing mechanism from particulate material entering at or near the sealing area. By doing this, the intent is to allow the sealing mechanism to operate in a cleaner environment with the result being extended operating life.
  • the externally mounted design is available in a split and non-split (solid) design.
  • the advantage of the split design is that the equipment does not have to be disassembled and the benefit of the spiral adaptor technology can be utilized. There are enormous savings for the customer if this can be avoided.
  • the advantage of the solid design resides in the spiral adaptor technology and the benefit of a cleaner operating environment.
  • the externally designed spiral adaptor of this invention will create an enclosed cavity for the rotating component of a mechanical seal. Furthermore, it is possible to dimension the outboard side of the device to accept virtually any mechanical seal or packing material that is available on the market. The mechanical seal or packing being utilized will determine the cavity depth of the externally mountable spiral adaptor of the invention.
  • the present invention may be broadly set forth as a spiral adaptor for location at an entrance to an annular seal cavity of rotating equipment, such seal cavity being defined by a outer cylindrical surface of a rotatable shaft of such equipment and a shaft housing surrounding at least a portion of the shaft, the cavity having a bottom end, an entrance end and an outer cylindrical surface, the equipment including a mechanical seal positioned outboard of the shaft housing adjacent the entrance to the seal cavity.
  • the adaptor comprises: an annular adaptor body having a central bore therethrough, the adaptor body including a first annular portion receivable within the seal cavity at the entrance thereto and a second annular portion of greater diameter than the first annular portion, the second annular portion having an inboard radial surface adapted for contact with a complementary face of the shaft housing and an outboard radial surface adapted for contact with a complementary face of the mechanical seal; the bore including a first portion defining an annular gap with the shaft outer cylindrical surface when the adaptor is in its operating position and a second portion which flares outwardly from the first bore portion towards said outboard radial surface, the first and second bore portions each including a spiral groove formed therein, the hand thereof being in the same direction as the rotation of the shaft, the groove serving to redirect contaminant material contained in fluids surrounding the shaft away from said the cavity.
  • the present invention may be considered as providing a spiral adaptor for location at an entrance to an annular seal cavity of rotating equipment, such seal cavity being defined by a outer cylindrical surface of a rotatable shaft of such equipment and a shaft housing surrounding at least a portion of the shaft, the cavity having a bottom end, an entrance end and an outer cylindrical surface, the equipment including a mechanical seal positioned outboard of the shaft housing adjacent the entrance to the seal cavity, the adaptor comprising: an annular adaptor body receivable within the seal cavity at the entrance thereto and having a central bore therethrough; the adaptor body including an outboard radial surface adapted for contact with a complementary face of the mechanical seal; the bore including a first portion defining an annular gap with the shaft outer cylindrical surface when the adaptor is in its operating position and a second portion which flares outwardly from the first bore portion towards the outboard radial surface, the first and second bore portions each including a spiral groove formed therein, the hand thereof being in the same direction as the rotation of the shaft, the groove
  • the present invention may be considered as providing a spiral adaptor for location within an annular seal cavity of rotating equipment, such seal cavity being defined by a outer cylindrical surface of a rotatable shaft of such equipment and a shaft housing surrounding at least a portion of the shaft, the cavity having a bottom end, an entrance end and an outer cylindrical surface
  • the adaptor comprising: an annular adaptor body receivable within the seal cavity and having a central bore therethrough; the adaptor body including a first annular body portion positionable at the bottom end of the seal cavity and a second annular body portion outboard the first body portion; the bore including a first portion defining an annular gap with the shaft outer cylindrical surface when the adaptor is in its operating position and a second portion which flares outwardly from the first bore portion towards a radially inwardly tapering central portion, the first, second and central bore portions each including a spiral groove formed therein, the hand thereof being in the same direction as the rotation of the shaft, the groove serving to redirect contaminant material contained in fluids surrounding
  • FIG. 1 illustrates in partial cross-section a typical environment for a spiral adaptor of the present invention, as located at the entrance to the seal cavity of rotating fluid equipment.
  • FIG. 2 illustrates in enlarged cross-section a first embodiment of the spiral adaptor of the present invention.
  • FIG. 3 illustrates in enlarged cross-section a second embodiment of the spiral adaptor of the present invention.
  • FIG. 4 illustrates in enlarged cross-section a third embodiment of the spiral adaptor of the present invention.
  • FIG. 5 illustrates in enlarged cross-section a fourth embodiment of the spiral adaptor of the present invention.
  • FIG. 6 illustrates in enlarged cross-section a fifth embodiment of the spiral adaptor of the present invention.
  • FIG. 7 illustrates in enlarged cross-section a sixth embodiment of the spiral adaptor of the present invention.
  • FIG. 8 illustrates in enlarged cross-section a seventh embodiment of the spiral adaptor of the present invention.
  • FIG. 9 illustrates in enlarged cross-section an eighth embodiment of the spiral adaptor of the present invention.
  • FIG. 10 illustrates in enlarged cross-section a ninth embodiment of the spiral adaptor of the present invention.
  • FIG. 11 illustrates in enlarged cross-section a tenth embodiment of the spiral adaptor of the present invention.
  • FIG. 12 illustrates in enlarged cross-section the spiral adaptor of the present invention as utilized in the arrangement of FIG. 11 .
  • FIG. 13 illustrates in enlarged cross-section an eleventh embodiment of the spiral adaptor of the present invention.
  • FIG. 14 illustrates in enlarged cross-section the spiral adaptor of the present invention as utilized in the arrangement of FIG. 13 .
  • FIG. 1 of the drawings illustrates a typical environment in which a spiral adaptor of the present invention will be useful.
  • equipment 10 will include a rotatable shaft 12 , bearingly mounted on an axis A, and surrounded at least in part by a shaft housing 14 .
  • the housing 14 defines with an outer cylindrical surface 16 of the shaft 12 an annular seal cavity 18 having a bottom end defined by radial flange 20 , an entrance end 22 and an outer cylindrical surface 24 .
  • a mechanical seal 26 is typically positioned outboard of the seal cavity adjacent the shaft housing at the entrance to the seal cavity. The details of the mechanical seal are not germane to the present invention and will not be described herein.
  • FIG. 1 there is an external spiral adaptor 28 of the present invention located at the entrance to the seal cavity, positioned so as to be between the housing 14 and the mechanical seal 26 .
  • the adaptor 28 is described in greater detail with reference to FIG. 2 .
  • the spiral adaptor 28 in accordance with the present invention will now be described. It is expected that this embodiment will be the one most commonly used in existing and new rotary equipment and it is the one depicted in position in FIG. 1 .
  • the spiral adaptor 28 can be machined from a single billet of suitable material, such as stainless steel, PTFE, or PEEK. A composite such as PTFE or PEEK is preferred since the machining time therefor is much less than with a metal.
  • the spiral adaptor of the present invention may be formed as a solid (unitary) ring or it may be split into two or more sections or segments, typically along a vertical or a horizontal axis. If a split adaptor is used then the sections or segments thereof will have suitable mating pins and holes to align the sections or segments together, as well as appropriate fastening means, such as machine screws, to hold them together.
  • the adaptor 28 has an annular adaptor body 30 having a central bore 32 extending therethrough.
  • the adaptor body includes a first annular portion 34 which is adapted for a tight fit within the seal cavity 18 at the entrance 22 thereto.
  • the annular portion 34 may include a circumferential groove 36 therein for reception of an annular sealing member 38 ( FIG. 1 ) such as an O-ring which will have sealing engagement with the outer cylindrical surface 24 of the seal cavity 18 when the spiral adaptor is in position.
  • the adaptor body includes a second annular portion 40 of diameter greater than that of the first annular portion 34 .
  • the second annular portion 40 has an inboard radial surface 42 adapted for contact with a complementary face surface 44 of the shaft housing 14 and an outboard radial surface 46 adapted for contact with a complementary face surface 48 of the mechanical seal 26 .
  • the inboard radial surface 42 may be provided with a ribbed gasket surface 50 for sealing engagement with the complementary surface 44 of the housing 14 .
  • the adaptor body bore 32 includes two portions, a first portion 52 which defines an annular gap G ( FIG. 1 ) with the outer cylindrical surface 16 of the shaft 12 and a second portion 54 which flares outwardly from the outboard end of the first portion 52 towards the outboard radial surface 46 of the second annular body portion 40 .
  • Each of the bore portions 52 , 54 is provided with its own spiral groove 56 , 58 respectively therein, the hand of the spiral grooves 56 , 58 being in the same direction of the rotation of the shaft 12 .
  • the grooves 56 , 58 serve to redirect any contaminant-containing fluids away from the seal cavity such that damaging particulate material or other contaminants contained within operating fluids will not enter the seal cavity.
  • the grooves 56 , 58 are similar to those described in aforementioned U.S. Pat. No. 5,553,868 in that they include both radial and non-radial portions.
  • the non-radial portions 60 extend non-radially into the body of the adaptor from the respective bore portion and the radial portions 62 extend radially from the inner end of the respective non-radial portion back towards the bore.
  • the groove 56 of the first bore portion 52 will lead smoothly into the groove 58 of the second or flared bore portion 54 .
  • FIG. 3 illustrates a variation on the embodiment of FIG. 2 which is intended to accommodate a situation in which there are restrictions on available axial space in which the spiral adaptor can be received.
  • the adaptor 64 of FIG. 3 could be utilized, it being noted that the first annular body portion 66 is considerably shorter in axial length than the second annular body portion 68 .
  • the first body portion 66 acts only as a locating boss to hold the spiral adaptor in position while the equipment is being assembled, such that the adaptor is self-centring with respect to the seal cavity.
  • the first annular body portion 66 is not long enough to include a circumferential groove and sealing member as is found in the embodiment of FIG. 2 .
  • the spiral adaptor 70 of FIG. 4 will accomplish this need in that the first annular portion 72 thereof is considerably longer than the second annular portion 74 .
  • the first annular portion 72 is preferably provided with at least two circumferential grooves 76 , each of which can receive a suitable sealing member, such as an O-ring as described for the first embodiment, to effect sealing engagement with the outer cylindrical surface 24 of the seal cavity 18 .
  • FIG. 7 illustrates a spiral adaptor 100 that is advantageous in those situations where the complementary face surface 44 of the shaft housing 14 is eroded or damaged and the ribbed gasket surface 50 will not provide sufficient sealing contact with the face surface 44 .
  • an annular groove 102 is machined in the inboard radial surface 42 of the second annular portion 40 and a soft, flexible gasket 104 is positioned in the groove, which gasket will effect suitable sealing contact with the complementary face surface 44 . Should the face surface 44 be eroded to the point where neither the ribbed gasket surface 50 nor the separate gasket member 104 is acceptable, the customer may have to machine the face surface 44 back to its original condition before the spiral adaptor is assembled thereto.
  • spiral adaptor 110 is illustrated in FIG. 8 , where a single intermediate portion 112 is located between the first portion 114 and the second, flared portion 116 .
  • the intermediate portion 112 is provided with a spiral groove 118 which leads smoothly into the spiral groove 120 of the flared bore portion 116 .
  • the transition 122 between the first bore portion 114 and the intermediate portion 112 is also flared and includes a spiral groove 124 , smoothly extending the groove 126 of the first portion 114 to the spiral groove 118 of the intermediate portion.
  • Such an embodiment can be used with mechanical seal arrangements that are axially long, including both single and double mechanical seals.
  • the length of the intermediate portion will be selected to accommodate the physical parameters of the equipment. If more than one intermediate portion becomes necessary such could easily be provided with each such intermediate portion having an increasingly greater diameter as they lead from the first bore portion to the second bore portion of the adaptor.
  • FIG. 9 there is shown an embodiment which can be used to fill in a seal cavity if it is deemed necessary to do so, or if the cavity has a deep axial length and only a small first obstruction space.
  • the first obstruction space is the physical space that is available for installation of the adaptor when the equipment is completely assembled.
  • the depth of the seal cavity might be 5 inches and the physical space between the end of the seal cavity and the bearing housing of the equipment might be only 3 inches. If the adaptor is provided in two pieces, each being 2.5 inches long then one piece can fit easily within the cavity, in the available 3 inch space for installation. The second piece can then be installed, for a total length of 5 inches.
  • a spiral adaptor 28 as depicted in FIG. 2 is illustrated in conjunction with a cavity insert 130 .
  • the insert 130 has an outer circumferential surface 132 sized for a sliding, tight fit within the cavity, the surface 132 being preferably, but not essentially, provided with at least two circumferential seal member-receiving grooves 134 .
  • the inner bore 136 of the insert is provided with a spiral groove 138 having a hand the same as the direction of rotation of the shaft, which groove will merge smoothly with the groove 56 found in the first annular portion of the adaptor 28 .
  • particulate material will be prevented from building up within the seal cavity; as particulate material enters the seal cavity they are rejected by the spiral groove 138 .
  • the insert 130 will be the first of the pieces mentioned above, the one that is inserted initially into the cavity while an adaptor 28 will be the second piece, the one that is inserted after the first piece to meet the cavity dimensional requirements.
  • FIG. 10 illustrates a spiral adaptor which is especially adapted for use with an “agitator” type of rotary equipment.
  • An agitator is a rotary component that has a large blade assembly that rests inside a larger tank, and rotates to “agitate” or mix the product within the tank.
  • These tanks are common in the pulp and paper industry, the tanks being typically filled with a slurry of paper stock.
  • the spiral adaptor 140 of FIG. 10 includes all of the standard features as described with respect to the other embodiments and, in addition, it is provided with a shutoff mechanism 142 which when activated will seal itself against the shaft when the shaft has been brought to a halt.
  • the shutoff mechanism 142 could entail a flexible sealant ring 144 held within a circumferential groove 145 in the bore 146 of the adaptor.
  • a radially directed passage or bore 148 would be connected to a source of hydraulic or pneumatic pressure (not shown) which, when activated would force the ring 144 into sealing contact with the shaft.
  • FIGS. 11 and 12 illustrate a situation in which packing can be used in conjunction with a spiral adaptor especially adapted for use therewith.
  • FIG. 11 shows a shaft 12 , shaft housing 14 and a seal cavity 18 , much as is shown in FIG. 1 .
  • the housing 14 includes a passage 150 for feeding flushing fluid to the seal cavity.
  • An annular spiral adaptor 152 is positioned deep within the cavity from the entrance of the cavity and one or more packing rings 154 are forced into an annular cavity 156 defined between the adaptor 152 and the shaft 12 , as will be seen from FIG. 12 , which shows the adaptor in greater detail.
  • An annular gland plate 157 applies an axial force against the outermost packing ring to hold the rings in position.
  • the gland plate 157 is secured to the housing 14 by threaded bolts 158 .
  • the annular body 160 of the adaptor 152 has a first annular portion 162 having, preferably, an external circumferential groove 164 for reception of a sealing ring (not shown).
  • the annular portion 162 has a first bore 166 and a spiral groove 168 therein as with the other embodiments.
  • a second annular portion 170 has an outer circumferential groove 172 which communicates with the passage 150 as well as one or more through bores 174 communicating the groove 172 with the interior of the adaptor.
  • An outwardly flaring, spiral grooved section 176 leads from the bore 166 to a radially inwardly tapering bore section 178 , which in turn leads to a short straight bore section 180 , also provided with a spiral groove 182 .
  • annular extension 182 which preferably has at least two circumferential grooves 184 in the outer circumferential surface thereof, each for reception of a sealing ring (not shown).
  • the extension 182 has an enlarged bore 186 which extends inwardly thereof to an annular shoulder 188 , against which the innermost of the packing rings 154 will abut once the adaptor and the packing have been assembled to the rotary equipment.
  • This embodiment is particularly advantageous where there is a large radial cross-section being used, the adaptor being fittable externally into the seal cavity.
  • This embodiment will permit the operator to reduce the diameter of the packing rings being used, while also permitting more packing rings to be used than otherwise. For example, in large equipment it would be possible to go from two rings of 0.750′′ radial cross-section to three rings of 0.500′′ radial cross-section. By being able to use more packing rings, of smaller radial cross-section, it is possible to reduce the packing cost without sacrificing sealing efficiency.
  • FIGS. 13 and 14 illustrate a variation on the embodiment of FIGS. 11 and 12 .
  • the extension 182 is provided with a radial flange 190 at the outboard end thereof, which flange helps to lengthen the extension 182 and thus will allow for the inclusion of additional packing in the assembly.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)
  • Sealing Devices (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
  • Endoscopes (AREA)
  • Joints Allowing Movement (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Earth Drilling (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Telephone Function (AREA)
US10/498,812 2002-01-03 2002-12-12 Externally mountable spiral adaptor Abandoned US20050087935A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/606,032 US7314218B2 (en) 2002-01-03 2006-11-30 Externally mountable spiral adaptor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2,366,696 2002-01-03
CA002366696A CA2366696A1 (en) 2002-01-03 2002-01-03 Externally mountable spiral bushing
PCT/CA2002/002002 WO2003056218A1 (en) 2002-01-03 2002-12-24 Externally mountable spiral adaptor

Related Child Applications (1)

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US11/606,032 Continuation US7314218B2 (en) 2002-01-03 2006-11-30 Externally mountable spiral adaptor

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US20050087935A1 true US20050087935A1 (en) 2005-04-28

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US10/498,812 Abandoned US20050087935A1 (en) 2002-01-03 2002-12-12 Externally mountable spiral adaptor
US11/606,032 Expired - Lifetime US7314218B2 (en) 2002-01-03 2006-11-30 Externally mountable spiral adaptor

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US11/606,032 Expired - Lifetime US7314218B2 (en) 2002-01-03 2006-11-30 Externally mountable spiral adaptor

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US (2) US20050087935A1 (de)
EP (1) EP1461550B1 (de)
AT (1) ATE330154T1 (de)
AU (1) AU2002351620B2 (de)
BR (1) BRPI0215490B1 (de)
CA (2) CA2366696A1 (de)
DE (1) DE60212451T2 (de)
ES (1) ES2269784T3 (de)
MX (1) MXPA04006536A (de)
WO (1) WO2003056218A1 (de)
ZA (1) ZA200405404B (de)

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US20060022414A1 (en) * 2004-07-30 2006-02-02 Balsells Peter J Rotary cartridge seals with composite retainer
US20070283806A1 (en) * 2006-06-09 2007-12-13 James Morrison Additive pump
US20100187764A1 (en) * 2007-07-19 2010-07-29 Alan James Roddis Seal cavity protection
US20180100583A1 (en) * 2016-10-11 2018-04-12 Viking Pump, Inc. Pump shaft packing gland and bushing
US20180216625A1 (en) * 2015-08-06 2018-08-02 Ebara Corporation Shaft seal device and vertical pump with this shaft seal device
USD906485S1 (en) 2017-09-27 2020-12-29 Natural Gas Solutions North America, Llc Shaft seal
US11339779B2 (en) 2017-09-27 2022-05-24 Natural Gas Solutions North America, Llc Containing fluid leaks on additive pumps
US11566616B2 (en) 2016-10-11 2023-01-31 Viking Pump, Inc. Pump shaft packing gland and bushing

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US8002285B2 (en) * 2003-05-01 2011-08-23 Justak John F Non-contact seal for a gas turbine engine
EP1996817A4 (de) * 2005-11-28 2011-07-06 Cadtech Innovations Buchse und laternenring für rotationsfluidpumpeinrichtung
EP2008005B1 (de) * 2006-04-06 2013-06-12 Dresser-Rand Company Gleitdichtungen für schmierfilm
GB0609115D0 (en) * 2006-05-09 2006-06-21 Aes Eng Ltd Seal Cavity Protection
GB2460031B (en) * 2008-05-13 2010-08-04 Rolls Royce Plc Seal assembly
US9022390B2 (en) * 2012-09-05 2015-05-05 United Technologies Corporation Threaded seal for a gas turbine engine
GB2515998B (en) * 2013-05-01 2015-11-18 Aes Eng Ltd PFR bushing
DE102014011315A1 (de) * 2014-08-04 2016-02-04 Michael Niederbacher Flüssigsubstratbehälter für eine Biogasanlage
CN106050728B (zh) * 2016-07-12 2018-11-13 浙江工业大学 一种内壁仿龙卷风螺旋沟槽复合结构的密封腔体
US11187918B2 (en) 2018-06-11 2021-11-30 Carl Henneke Systems and methods associated with glasses
US20240145290A1 (en) * 2022-10-26 2024-05-02 Kla Corporation Method and apparatus for dynamic sealing between zones of ultra-clean vacuum system

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US10655632B2 (en) * 2015-08-06 2020-05-19 Ebara Corporation Shaft seal device and vertical pump with this shaft seal device
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CA2366696A1 (en) 2003-07-03
MXPA04006536A (es) 2004-10-04
AU2002351620A1 (en) 2003-07-15
CA2472166C (en) 2010-05-11
ES2269784T3 (es) 2007-04-01
ZA200405404B (en) 2005-07-27
BRPI0215490A2 (pt) 2016-12-13
EP1461550A1 (de) 2004-09-29
DE60212451T2 (de) 2007-02-01
ATE330154T1 (de) 2006-07-15
WO2003056218A1 (en) 2003-07-10
DE60212451D1 (de) 2006-07-27
US7314218B2 (en) 2008-01-01
EP1461550B1 (de) 2006-06-14
AU2002351620B2 (en) 2010-02-18
US20070075501A1 (en) 2007-04-05
CA2472166A1 (en) 2003-07-10
BRPI0215490B1 (pt) 2018-05-02

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