US3431825A - High pressure device - Google Patents

High pressure device Download PDF

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Publication number
US3431825A
US3431825A US585957A US3431825DA US3431825A US 3431825 A US3431825 A US 3431825A US 585957 A US585957 A US 585957A US 3431825D A US3431825D A US 3431825DA US 3431825 A US3431825 A US 3431825A
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US
United States
Prior art keywords
ram
rod
high pressure
chamber
pressure chamber
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.)
Expired - Lifetime
Application number
US585957A
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English (en)
Inventor
John Crawley
Alan Saunders
William Henry Campbell
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.)
Vickers Ltd
Original Assignee
Vickers Ltd
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 Vickers Ltd filed Critical Vickers Ltd
Application granted granted Critical
Publication of US3431825A publication Critical patent/US3431825A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/007—Hydrostatic extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/211—Press driving devices

Definitions

  • a high pressure device having ram rod support means. Three types of supports are shown: hydraulically operable finger rams; relatively movable annular bushes; and plural support rods.
  • This invention relates to high pressure intensifiers of the kind embodying large and small rams working in tandem in communicating cylinders, the small ram being provided on or by an elongated relatively slender rod.
  • intensifiers are for purposes of, hydrostatic extrusion when the slender ram rod is subjected to considerable axial compression.
  • a main object of this invention is to prevent failure of the ram rod due to buckling under such operating conditions.
  • the invention provides a high pressure intensifier of the kind specified having support means arranged to provide relatively slidable radial support for said ram rod while permitting axial movement of the rams.
  • FIGURE 1 is a diagrammatic axial sectional view showing one form of the invention embodied in a high pressure intensifier which is partly broken away,
  • FIGURE 2 is a view similar to FIGURE 1 but shows a second form of the invention
  • FIGURE 3 is again a view similar to FIGURE 1 and shows a third form of the invention.
  • FIGURE 4 is a cross-sectional view taken along the line AA of FIGURE 3.
  • the intensifier embodies large and small rams working in tandem in communicating low and high pressure chambers respectively designated 2 and 2a.
  • the large ram working in the low pressure chamber 2 which can be pressurised through inlet 2b is conveniently in the form of a piston 4 of relatively short axial length.
  • the small ram working in the chamber 2a (see FIGURE 2) is in the form of a relatively long slender rod 5 which projects co-axially from the piston 4 constituting the large ram.
  • This ram rod 5 extends axially through the centre of the low pressure chamber 2 to enter the high pressure chamber 2a which opens through one end of the low pressure chamber as shown.
  • this high pressure chamber 2a may also constitute an extrusion chamber.
  • a high pressure intensifier of the invention has a plurality of hydraulic or pneumatic cylinders 1 spaced radially around the outside of the wall of the low pressure chamber 2, only one cylinder being shown in the crosssection of FIGURE 1.
  • Each cylinder 1 is however of substantially identical form and has a finger ram 3 working therein and arranged to project in a fluid tight manner through a registering opening in the wall of the low pressure chamber 2.
  • the cylinders exemplified by cylinder 1 may conveniently have their longitudinal axes in a common diarnetral plane.
  • the finger ram 3 of each cylinder is of such a length that the outer end 7 thereof can be caused to exert radial pressure on the ram rod 5.
  • the outer ram end 7 may have an arcuate form.
  • each ram 3 may be provided with differential pressure areas working in chambers 9 and 10 within its cylinder which chambers are connected by pipes 6 and 8 with the low pressure chamber 2 respectively at the rearmost pressurised end of the chamber and at a location intermediate the chamber ends.
  • each cylinder 1 The outermost chamber 9 in each cylinder 1 is arranged to be maintained at a constant pressure by way of pipe connection 6 to hold the associated finger ram 3 in an extended projecting position in which the finger ram end 7 bears on and supports the ram rod 5.
  • the piston 4 during travel, uncovers the pipe connection 8 between the innermost chamber 10 in the cylinder and the rearmost pressurised portion of low pressure chamber 2, the innermost chamber 10 is pressurised for purpose of finger ram retraction.
  • each finger ram 3 To permit complete retraction of each finger ram 3 the hole through which it projects into the low pressure chamber 2 is countersunk as at 11 so that the outer ram end 7 can be retracted flush with the inner wall surface of the chamber 2. The larger ram can then freely pass the ram fingers 3 when the latter are in a retracted position.
  • a high pressure intensifier of the invention has a plurality of supports preferably formed as annular bushes 1a, located co-axially along the ram rod 5. These supports or bushes 1a are each provided with an inner boss 12 which is a sliding fit on the rod 5 and with an outer rim 13 which bears slidably against the inner wall surface of the low pressure chamber 2.
  • the supporting bushes 1a are then pushed from an intermediate support position by the piston 4, constituting the large ram, towards the end of the low pressure chamber 2 through which the high pressure chamber 2a opens.
  • the supporting bushes 1a are progressively spread along the ram rod behind the piston 4 by flexible interconnecting links 3a and thus returned to the intermediate support position.
  • a high pressure intensifier of the invention has radial supports for the ram rod 5 in the form of rod members 1b mounted parallel to the axis of the ram rod 5 at angularly spaced intervals therearound.
  • rod members 1b may be of composite construction, as shown, each consisting of an inner rod and an outer bearing sleeve loosely carried on the inner rod.
  • the inner rods are mounted in tension between the ends of the low pressure chamber 2 to provide greater resistance to bending and together with their associated sleeves extend slidably through sealed openings 3b in the piston 4 which constitutes the large ram.
  • the rod members may be one piece members mounted as aforesaid.
  • the rams 4 and 5 are thus free to slide axially between and along the rod members 1b which afford radial support over the full length of the ram rod 5.
  • the use of the sleeves improves the strength of the mounting area for the rod members, and these sleeves may conveniently be made of a bearing material.
  • a high pressure device including a large ram slidable in a cylinder, a ram rod connected to said ram and extending outside said cylinder, a plurality of rod members each extending axially in tension between opposite ends of said cylinder, each of said rod members extending through sealed openings in the large ram and being arranged in radial contact with said ram rod to provide relatively slidable radial support for said ram rod while permitting axial movement of the ram.
  • rod members are each of composite construction comprising an inner rod carrying a loosely fitting outer bearing sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Actuator (AREA)
US585957A 1965-10-13 1966-10-11 High pressure device Expired - Lifetime US3431825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB43496/65A GB1157089A (en) 1965-10-13 1965-10-13 Improvements relating to High Pressure Intensifiers

Publications (1)

Publication Number Publication Date
US3431825A true US3431825A (en) 1969-03-11

Family

ID=10428997

Family Applications (1)

Application Number Title Priority Date Filing Date
US585957A Expired - Lifetime US3431825A (en) 1965-10-13 1966-10-11 High pressure device

Country Status (5)

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US (1) US3431825A (en))
DE (1) DE1528618A1 (en))
GB (1) GB1157089A (en))
NL (1) NL6614337A (en))
SE (1) SE315257B (en))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548625A (en) * 1967-07-05 1970-12-22 Western Electric Co Collapsible feed mechanism
DE2018926A1 (de) * 1970-01-31 1971-08-05 Tadano Iron Works Verfahren und Vorrichtung zum Verhindern des Ausknickens der Stößel mehrteiliger ausfahrbarer Ausleger
US3735623A (en) * 1970-11-16 1973-05-29 Texas Aluminum Co Indirect extrusion die assembly and method of extruding
US3791186A (en) * 1972-12-29 1974-02-12 Princeton Metal Systems Corp Collapsible feed mechanism
US3791187A (en) * 1972-12-29 1974-02-12 Princeton Metal Systems Corp Collapsible feed mechanism
US3836011A (en) * 1970-01-31 1974-09-17 T Sakamoto Extensible boom
US4132040A (en) * 1977-05-12 1979-01-02 Jlg Industries, Inc. Multi-section lifting boom
US4408424A (en) * 1981-03-20 1983-10-11 Richard K. Teichgraeber Telescoping cylinder stabilizer
US4969389A (en) * 1988-05-03 1990-11-13 Foster Raymond K Multisection hydraulic drive unit with single piston rod
US5191828A (en) * 1992-06-18 1993-03-09 Mccreery Robert B Telescopic cylinder with increased lateral loading capacity
US20180038163A1 (en) * 2015-04-02 2018-02-08 Halliburton Energy Services, Inc. Preventing Buckling For Downhole Linear Actuator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587360A (en) * 1897-08-03 carroll
US2307067A (en) * 1941-04-28 1943-01-05 Charles L Paulus Servo cylinder
US2910047A (en) * 1957-12-23 1959-10-27 William R Plummer Fluid operated cylinder and piston assembly
US3104592A (en) * 1961-10-19 1963-09-24 John M Sheesley Center bar actuator
US3146684A (en) * 1963-01-14 1964-09-01 Alton S Vanderhoof Fluid pressure piston and cylinder device with non-rotatable piston

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587360A (en) * 1897-08-03 carroll
US2307067A (en) * 1941-04-28 1943-01-05 Charles L Paulus Servo cylinder
US2910047A (en) * 1957-12-23 1959-10-27 William R Plummer Fluid operated cylinder and piston assembly
US3104592A (en) * 1961-10-19 1963-09-24 John M Sheesley Center bar actuator
US3146684A (en) * 1963-01-14 1964-09-01 Alton S Vanderhoof Fluid pressure piston and cylinder device with non-rotatable piston

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548625A (en) * 1967-07-05 1970-12-22 Western Electric Co Collapsible feed mechanism
DE2018926A1 (de) * 1970-01-31 1971-08-05 Tadano Iron Works Verfahren und Vorrichtung zum Verhindern des Ausknickens der Stößel mehrteiliger ausfahrbarer Ausleger
US3722154A (en) * 1970-01-31 1973-03-27 T Sakamoto Extensible boom with buckling-prevention
US3836011A (en) * 1970-01-31 1974-09-17 T Sakamoto Extensible boom
US3735623A (en) * 1970-11-16 1973-05-29 Texas Aluminum Co Indirect extrusion die assembly and method of extruding
US3791186A (en) * 1972-12-29 1974-02-12 Princeton Metal Systems Corp Collapsible feed mechanism
US3791187A (en) * 1972-12-29 1974-02-12 Princeton Metal Systems Corp Collapsible feed mechanism
US4132040A (en) * 1977-05-12 1979-01-02 Jlg Industries, Inc. Multi-section lifting boom
US4408424A (en) * 1981-03-20 1983-10-11 Richard K. Teichgraeber Telescoping cylinder stabilizer
US4969389A (en) * 1988-05-03 1990-11-13 Foster Raymond K Multisection hydraulic drive unit with single piston rod
US5191828A (en) * 1992-06-18 1993-03-09 Mccreery Robert B Telescopic cylinder with increased lateral loading capacity
US20180038163A1 (en) * 2015-04-02 2018-02-08 Halliburton Energy Services, Inc. Preventing Buckling For Downhole Linear Actuator

Also Published As

Publication number Publication date
DE1528618A1 (de) 1970-07-09
NL6614337A (en)) 1967-04-14
SE315257B (en)) 1969-09-29
GB1157089A (en) 1969-07-02

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