GB718238A - Improvements in or relating to screw pumps - Google Patents

Improvements in or relating to screw pumps

Info

Publication number
GB718238A
GB718238A GB2662352A GB2662352A GB718238A GB 718238 A GB718238 A GB 718238A GB 2662352 A GB2662352 A GB 2662352A GB 2662352 A GB2662352 A GB 2662352A GB 718238 A GB718238 A GB 718238A
Authority
GB
United Kingdom
Prior art keywords
threads
screw
driving screw
screws
idlers
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
Application number
GB2662352A
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.)
Imo Industri AB
Original Assignee
Imo Industri AB
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 Imo Industri AB filed Critical Imo Industri AB
Publication of GB718238A publication Critical patent/GB718238A/en
Expired 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F04C2/165—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

718,238. Rotary pumps. AKTIEDOLAGET IMO-INDUSTRI. Oct. 23, 1952 [Oct. 25, 1951], No. 26623/52. Class 110(2) A screw pump is provided with a casing consisting of two castings 2, 4 secured to the flange 6 of a housing 8 having intersecting bores in which are arranged a driving screw 10 and idler screws 30, 32, 34. The driving screw has convex thread flanks and the idlers concave thread flanks, the number of idlers and the number of threads on each screw being such that a single tortuous passage is defined through the casing. At one end of the driving screw is a shaft extension 12 rotatably mounted in the casing 2 and at the other end is a shaft extension 14 mounted in a bearing 16. Liquid enters the casing through an inlet 26 and is discharged through an outlet 22. As shown in the drawings, each of the screws has two threads, the idler screws being of opposite hand to the driving screw. The number of idlers n and the number of threads on each screw satisfies the formula G-ng = Π1, where G is the number of threads on the driving screw, and g the number of threads on the idler screws. The length L of the screws and of the housing is preferably not less than N/nP + W, where N is the total number of threads of driving screw and idlers, P is the pitch and W the top width of the driving screw thread. The length of the screw and housing may be at least 8/3 P + W.
GB2662352A 1951-10-25 1952-10-23 Improvements in or relating to screw pumps Expired GB718238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1064986XA 1951-10-25 1951-10-25

Publications (1)

Publication Number Publication Date
GB718238A true GB718238A (en) 1954-11-10

Family

ID=22311730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2662352A Expired GB718238A (en) 1951-10-25 1952-10-23 Improvements in or relating to screw pumps

Country Status (4)

Country Link
CH (1) CH309671A (en)
DE (1) DE1004930B (en)
FR (1) FR1064986A (en)
GB (1) GB718238A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000021280A1 (en) * 2020-09-09 2022-03-09 Metelli S P A MULTI-SCREW PUMP FOR COOLING CIRCUITS

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1201686B (en) * 1957-02-28 1965-09-23 Fritz Prinz Screw pump with two screws and axial thrust compensation
CH393096A (en) * 1962-06-13 1965-05-31 Sulzer Ag Screw pump
FR2831614B1 (en) * 2001-10-25 2004-01-23 Simon Kadoche REVERSIBLE SCREW HYDRAULIC PUMP WITHOUT EXTERNAL DRAINAGE
US7232297B2 (en) 2003-05-08 2007-06-19 Automotive Motion Technology Limited Screw pump
GB2401400A (en) * 2003-05-08 2004-11-10 Automotive Motion Tech Ltd Pump with screw pitch less than 1.6 times the diameter
GB2419920B (en) 2004-11-08 2009-04-29 Automotive Motion Tech Ltd Pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698802A (en) * 1924-04-07 1929-01-15 Montelius Carl Oscar Josef Device for transferring energy to or from alpha fluid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000021280A1 (en) * 2020-09-09 2022-03-09 Metelli S P A MULTI-SCREW PUMP FOR COOLING CIRCUITS
EP3967882A1 (en) * 2020-09-09 2022-03-16 METELLI S.p.A. Multiscrew pump for cooling circuits

Also Published As

Publication number Publication date
DE1004930B (en) 1957-03-21
CH309671A (en) 1955-09-15
FR1064986A (en) 1954-05-19

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