GB1065000A – An improved meshing screw pump
– Google Patents
GB1065000A – An improved meshing screw pump
– Google Patents
An improved meshing screw pump
Info
Publication number
GB1065000A
GB1065000A
GB5407865A
GB5407865A
GB1065000A
GB 1065000 A
GB1065000 A
GB 1065000A
GB 5407865 A
GB5407865 A
GB 5407865A
GB 5407865 A
GB5407865 A
GB 5407865A
GB 1065000 A
GB1065000 A
GB 1065000A
Authority
GB
United Kingdom
Prior art keywords
rod
liquid
screws
inlet
pump
Prior art date
1965-12-21
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
GB5407865A
Inventor
Frederick Pollak
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.)
Stothert and Pitt Ltd
Original Assignee
Stothert and Pitt 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.)
1965-12-21
Filing date
1965-12-21
Publication date
1967-04-12
1965-12-21
Application filed by Stothert and Pitt Ltd
filed
Critical
Stothert and Pitt Ltd
1965-12-21
Priority to GB5407865A
priority
Critical
patent/GB1065000A/en
1966-12-17
Priority to DE19661553214
priority
patent/DE1553214C3/en
1966-12-20
Priority to FR88227A
priority
patent/FR1505892A/en
1967-04-12
Publication of GB1065000A
publication
Critical
patent/GB1065000A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
F04C14/10—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
F04C14/12—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
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
F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
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
Abstract
1,065,000. Rotary pumps. STOTHERT & PITT Ltd. Dec. 21, 1965, No.54078/65. Heading F1F In a rotary pump of the meshing-screw type, which has a pair of screws (7, 8) Figs. 1 to 3 (not shown), with threads of non-uniform pitch, the rate of liquid displacement depends upon the position of a movable sleeve-element (13) relative to a fixed sleeve-element (11) situated adjacent an outlet (10) for the liquid. The pitch of the threads is diminished progressively towards the ends of the screws which lie adjacent an inlet (9) for the liquid, and to minimize cavitation in the liquid the axial length of the element (11) is such that it spans a minimum number e.g. two, of thread-pitches necessary to effect a pumping action when said element lies adjacent the inlet (9). The fixed element (11) serves to virtually augment the axial length of the element (13) when the latter lies adjacent thereto, so as to ensure a pumping action, owing to the greater threadpitch at the output end of the screws. The element (13) is moved by rotation e.g. manually, of a wheel (22) on a screw-threaded rod (21), which engages with a nut at one end of a further rod (14) whose other end is attached to said element. The rod (14) carries a piston (18) which is lodged in a cylinder (19) connected at one end to the high-pressure side (H) of the pump through a bore (34) containing the rod (14) and at the other end to the low-pressure side (L) of the pump through a pipe (35) so as to minimize the axial force required to move the element (13). A pressure-relief aperture or «weep hole» (23) is provided in the element (11) to prevent damage due to liquid being trapped between the elements. Noise due to cavitation in spaces or chambers defined by the portions of the threads lying within the element (13) may be minimized by a spooltype valve-member (29), Figs. 4 and 5 (not shown), lodged in the rod (14) which is moved to allow liquid to flow back from the high-pressure side of the element (13) into said chambers when the element is situated at the inlet end of the screws. Normally, the member (29) is held by a spring (32) in a position, according to Fig. 4, wherein it closes a pair of transverse passages (31) in a portion of the rod (14) lying on the high-pressure side of the element (13). When said element approaches the inlet end of the screws, the valve is moved against the action of the spring (32), to open the passages (31), by a plunger (30) abutting a portion of the casing (1). Liquid flowing from the passages (31) enters said spaces or chambers through a bore in the rod (14) wherein the member (29) is lodged, further transverse passages (33) in said rod, and a passage (26, 27) in said element. The pump may be modified to include either a single inlet and two outlets, or a single outlet and two inlets, as described in Specification 890, 507.
GB5407865A
1965-12-21
1965-12-21
An improved meshing screw pump
Expired
GB1065000A
(en)
Priority Applications (3)
Application Number
Priority Date
Filing Date
Title
GB5407865A
GB1065000A
(en)
1965-12-21
1965-12-21
An improved meshing screw pump
DE19661553214
DE1553214C3
(en)
1965-12-21
1966-12-17
Screw pump
FR88227A
FR1505892A
(en)
1965-12-21
1966-12-20
Development of rotary, variable flow, constant speed and positive displacement pumps
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB5407865A
GB1065000A
(en)
1965-12-21
1965-12-21
An improved meshing screw pump
Publications (1)
Publication Number
Publication Date
GB1065000A
true
GB1065000A
(en)
1967-04-12
Family
ID=10469849
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5407865A
Expired
GB1065000A
(en)
1965-12-21
1965-12-21
An improved meshing screw pump
Country Status (3)
Country
Link
DE
(1)
DE1553214C3
(en)
FR
(1)
FR1505892A
(en)
GB
(1)
GB1065000A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2604755A1
(en)
*
1986-10-07
1988-04-08
Mannesmann Ag
Controllable screw compressor with two rotors
EP1247984A1
(en)
*
2001-04-03
2002-10-09
CFS Slagelse A/S
Screw conveyor for the transport of flowable substances and/or lumps of material
EP1960671B1
(en)
*
2005-12-13
2012-07-11
Edwards Limited
Screw pump for pumping gases
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CH635403A5
(en)
*
1978-09-20
1983-03-31
Edouard Klaey
SCREW MACHINE.
GB2165890B
(en)
*
1984-10-24
1988-08-17
Stothert & Pitt Plc
Improvements in pumps
FR2656383A1
(en)
*
1989-12-27
1991-06-28
Leau Yves
Method for pumping liquid, and its application for high-pressure cleaning
1965
1965-12-21
GB
GB5407865A
patent/GB1065000A/en
not_active
Expired
1966
1966-12-17
DE
DE19661553214
patent/DE1553214C3/en
not_active
Expired
1966-12-20
FR
FR88227A
patent/FR1505892A/en
not_active
Expired
Cited By (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2604755A1
(en)
*
1986-10-07
1988-04-08
Mannesmann Ag
Controllable screw compressor with two rotors
BE1001619A3
(en)
*
1986-10-07
1989-12-19
Mannesmann Ag
Adjustable screw compressor.
EP1247984A1
(en)
*
2001-04-03
2002-10-09
CFS Slagelse A/S
Screw conveyor for the transport of flowable substances and/or lumps of material
WO2002081922A2
(en)
*
2001-04-03
2002-10-17
Cfs Slagelse A/S
Screw conveyor for the transport of flowable substances and/or lumps of material
WO2002081922A3
(en)
*
2001-04-03
2002-12-12
Cfs Slagelse As
Screw conveyor for the transport of flowable substances and/or lumps of material
US7044289B2
(en)
2001-04-03
2006-05-16
Cfs Slagelse A/S
Screw conveyor for the transport of flowable substances and/or lumps of material
EP1960671B1
(en)
*
2005-12-13
2012-07-11
Edwards Limited
Screw pump for pumping gases
Also Published As
Publication number
Publication date
FR1505892A
(en)
1967-12-15
DE1553214A1
(en)
1971-04-01
DE1553214C3
(en)
1974-10-10
DE1553214B2
(en)
1974-03-07
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