EP0178873A1
Expired / Lapsed
EP
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Liquid driven pump or propulsive apparatus
Assignee: Canadian Patents and Development Ltd
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Filing: 1985-10-14
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Granted: —
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Expires: 2005-10-14
Abstract
Abstract The apparatus relates to a jet pump or apparatus which displaces a main fluid by a pressurised driving liquid. The apparatus has a duct (13) to receive the main fluid, and a driving liquid manifold (14) cooperating with the duct to receive the pressurised driving liquid. First and second sets of inwardly facing jet nozzles (64, 65) are disposed adjacent a transverse plane of the duct and penetrate the duct side wall (42) to pass the driving liquid into the duct at a mixing portion (50) of the duct having a constant cross-sectional area. The first and second sets of jet nozzles are inclined at angles (71, Fig. 4; 74, Fig. 5) to the duct axis so that the first nozzles are inclined at a greater angle than the second nozzles. Efficiency of the pump is improved by admitting pressurised gas into the duct and providing the pump with a diverging outlet portion (18) to act as diffuser.
Inventors
- 👤 Alan P. Westfall
- 👤 Robert J. Roe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:58
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/02; F04F5/10; F04F5/44; F04F5/46; F04F5/463
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
233 words
A propulsive apparatus (12). for displacing a main fluid, the apparatus having a duct (13) extending along a duct axis (44) for receiving the main fluid, the duct having a duct side wall (42) to define in part a mixing portion (50) having a constant cross-sectional area, the duct side wall also defining in part inlet and outlet portions (16,18) spaced on upstream and downstream sides respectively of the mixing portion, the apparatus also having a driving liquid manifold (14) cooperating with the duct and adapted to receive pressurised driving liquid, and first and second sets of inwardly facing jet nozzles (64,65) cooperating with the duct side wall and the manifold (14) to pass the driving liquid into the mixing portion (50), the first and second sets of jet nozzles having respective first and second jet axes (70,73) inclined at respective first and second angles (71,74) to the duct axis (44) in which the first angle is greater than the second angle, the apparatus being further characterized by: the first and second sets of jet nozzles being positioned peripherally around the side wall so as to alternate with each other, either singly or in pairs, adjacent a transverse plane (67) of the duct, the two sets of jet nozzles having a total cross-sectional area which is within a range of approximately 3% to 15% of the cross sectional area of the mixing portion.
Claim 2
Dependent Claim
233 words
A propulsive apparatus (12). for displacing a main fluid, the apparatus having a duct (13) extending along a duct axis (44) for receiving the main fluid, the duct having a duct side wall (42) to define in part a mixing portion (50) having a constant cross-sectional area, the duct side wall also defining in part inlet and outlet portions (16,18) spaced on upstream and downstream sides respectively of the mixing portion, the apparatus also having a driving liquid manifold (14) cooperating with the duct and adapted to receive pressurised driving liquid, and first and second sets of inwardly facing jet nozzles (64,65) cooperating with the duct side wall and the manifold (14) to pass the driving liquid into the mixing portion (50), the first and second sets of jet nozzles having respective first and second jet axes (70,73) inclined at respective first and second angles (71,74) to the duct axis (44) in which the first angle is greater than the second angle, the apparatus being further characterized by: the first and second sets of jet nozzles being positioned peripherally around the side wall so as to alternate with each other, either singly or in pairs, adjacent a transverse plane (67) of the duct, the two sets of jet nozzles having a total cross-sectional area which is within a range of approximately 3% to 15% of the cross sectional area of the mixing portion.
Claim 3
Dependent Claim
54 words
An apparatus as claimed in Claim 1 further characterized by: (a) a gas manifold (27,28) cooperating with the duct (13) and adapted to receive pressurised gas, (b) a plurality of gas nozzles cooperating with the duct side well and the gas manifold to pass the gas into at least one of the duct portions.
Claim 4
Dependent Claim
76 words
An apparatus as claimed in Claim 1 further characterized by: (a) the outlet portion (18) diverging downstream from the mixing portion (50) so as to have a larger cross-sectional area than the mixing portion, (b) a gas manifold (27,28) adapted to receive pressurised gas and to cooperate with the duct, (c) a plurality of gas nozzles (49,53) cooperating with the side wall of the duct and the gas manifold to pass the gas into the duct.
Claim 5
Dependent Claim
60 words
An apparatus as claimed in Claim 1 further characterized in that: (a) the first angle (71) of the first nozzles (64) is between 15 degrees and 30 degrees, (b) the second angle (74) of the second nozzles (65) is between 10 degrees and 20 degrees, (c) the first and second angles are separated by no less than about 5 degrees.
Claim 6
Dependent Claim
65 words
An apparatus as claimed in Claim 1 further characterized in that: (a) the first angle (71) of the first nozzles (64) is between 18 degrees and 25 degrees, (b) the second angle (74) of the second nozzles (65) is between 12 degrees and 19 degrees, (c) the first angle and the second angle are within a range of 5 to 10 degrees of each other.
Claim 7
Dependent Claim
52 words
6 . An apparatus as claimed in Claim 3 further characterized in that: (a) the mixing portion (50) has a minimum axial length (68) extending from the transverse (67) plane containing the jet nozzles (64,65) to the outlet portion (18), which axial length is approximately three time width of the mixing portion.
Claim 8
Dependent Claim
49 words
An apparatus as claimed in Claim 1 further characterized in that: (a) the side wall (42) of the duct (13) is relatively smooth adjacent the jet nozzles (64,65) and is free of steps or significant changes in size to reduce turbulence or possible damage to the product being handled.
Claim 9
Dependent Claim
29 words
An apparatus as claimed in Claim 1 further characterized in that: (a) most of the inlet portion (16) and all the mixing portion (50) have a similar cross-sectional area.
Claim 10
Dependent Claim
223 words
A propulsive apparatus (10) for displacing a main fluid, the apparatus having a duct (13) extending along a duct axis (44) for receiving the main fluid, the duct having a duct side wall (42) to define in part a mixing portion (50) having a constant cross-sectional area, the duct side wall also defining in part inlet and outlet portions (16,18) spaced on upstream and downstream sides respectively of the mixing portion, the apparatus also having a driving liquid manifold (14) cooperating with the duct and adapted to receive pressurised driving liquid, and a set of inwardly facing jet nozzles (64) disposed adjacent a transverse plane (67) of the duct, the jet nozzles cooperating with the duct side wall and manifold to pass driving liquid into the mixing portion, the nozzles having jet axes (70) inclined at similar angles (71) to the duct axis of between 10° and 30 0 , the apparatus being further characterized by: (a) the outlet portion (18) diverging downstream from the mixing portion so as to have a larger cross-sectional area than the mixing portion (50), (b) a gas manifold (27,28) adapted to receive pressurised gas and to cooperate with the duct (13), and a plurality of gas nozzles (49,53) cooperating with the side wall of the duct and the gas manifold to pass the gas into the duct.
Claim 11
Dependent Claim
223 words
A propulsive apparatus (10) for displacing a main fluid, the apparatus having a duct (13) extending along a duct axis (44) for receiving the main fluid, the duct having a duct side wall (42) to define in part a mixing portion (50) having a constant cross-sectional area, the duct side wall also defining in part inlet and outlet portions (16,18) spaced on upstream and downstream sides respectively of the mixing portion, the apparatus also having a driving liquid manifold (14) cooperating with the duct and adapted to receive pressurised driving liquid, and a set of inwardly facing jet nozzles (64) disposed adjacent a transverse plane (67) of the duct, the jet nozzles cooperating with the duct side wall and manifold to pass driving liquid into the mixing portion, the nozzles having jet axes (70) inclined at similar angles (71) to the duct axis of between 10° and 30 0 , the apparatus being further characterized by: (a) the outlet portion (18) diverging downstream from the mixing portion so as to have a larger cross-sectional area than the mixing portion (50), (b) a gas manifold (27,28) adapted to receive pressurised gas and to cooperate with the duct (13), and a plurality of gas nozzles (49,53) cooperating with the side wall of the duct and the gas manifold to pass the gas into the duct.
Claim 12
Dependent Claim
39 words
An apparatus as claimed in claim 9 further characterized in that: (a) the jet nozzles (64) have a total cross-sectional area which is within a range of 3% to 15% of the cross-sectional area of the mixing portion (50).
References Cited (Backward Citations)
FR521176A
Cited
CH101872A
Cited
FR1410801A
Cited
DE2541439A1
Cited
US4155682A
Cited
US4379679A
Cited
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