Patent US3643675A successfully refreshed from Google Patents.
US3643675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for providing a control of the velocity profile of the working medium in the inlet of flow medium
Assignee: Individual
•
Filing: 1970-01-02
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Granted: 1972-02-22
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Expires: 1990-01-02
Abstract
Abstract A method and apparatus for controlling the velocity profile of the working medium of fluid actuated or fluid impelling mechanisms, such as water and gas turbines, turbopumps, compressors, etc., having radial or axial flow patterns in which a control fluid of the same character as the working fluid is introduced tangentially into the working fluid at the working fluid inlet to impart a rotational motion to the working fluid either in the same direction as the direction of rotation of the rotor of the mechanism or in a direction opposite to the direction of rotation of the rotor, and at a substantial distance forward of the rotor, with respect to the direction of flow of working fluid, and the rotational movement is then amplified by restricting the flow path of the working fluid prior to its contact with the rotor. Preferably, the control fluid is introduced through a plurality of orifices or nozzles distributed along radially disposed conduits in the working fluid inlet and the control fluid is obtained from the outlet of the machine or from both the outlet and an external source and is passed through a control apparatus, such as a fluid amplifier system, to control the volume, pressure and distribution through the orifices or nozzles.
Inventors
- 👤 Lennart Wetterstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:20
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/148; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/206; Y10T137/2087; Y10T137/2098
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
96 words
A method for controlling the velocity profile of the working medium of a fluid flow machine having a motor comprising; introducing a control fluid of the same character as said working fluid tangentially into said working fluid at a substantial distance forward of the rotor of said machine, with respect to the direction of flow of said working fluid to impart a rotational motion to said working fluid and reducing the crosssectional area of the flow path of said working fluid prior to contact of said working fluid with said rotor to amplify said rotational motion.
Claim 2
Independent Claim
96 words
A method for controlling the velocity profile of the working medium of a fluid flow machine having a motor comprising; introducing a control fluid of the same character as said working fluid tangentially into said working fluid at a substantial distance forward of the rotor of said machine, with respect to the direction of flow of said working fluid to impart a rotational motion to said working fluid and reducing the crosssectional area of the flow path of said working fluid prior to contact of said working fluid with said rotor to amplify said rotational motion.
Claim 3
Dependent Claim
21 words
A method in accordance with claim 1 wherein the control fluid is introduced in the direction of rotation of the rotor.
Claim 4
Dependent Claim
25 words
A method in accordance with claim 1 wherein the control fluid is introduced in a direction opposite to the direction of rotation of the rotor.
Claim 5
Dependent Claim
32 words
A method in accordance with claim 1 wherein the control fluid is introduced in the direction of rotation of the rotor and in a direction opposite to the rotation of said rotor.
Claim 6
Dependent Claim
25 words
A method in accordance with claim 1 wherein at least a part of the control fluid is withdrawn from the pressure side of the machine.
Claim 7
Dependent Claim
22 words
A method in accordance with claim 5 wherein all of the control fluid is withdrawn from the pressure side of the machine.
Claim 8
Dependent Claim
18 words
A method in accordance with claim 1 wherein the fluid is introduced through a plurality of distributing means.
Claim 9
Dependent Claim
27 words
A method in accordance with claim 7 wherein the control fluid is adjusted to introduce said control fluid through a selected portion only of the distributing means.
Claim 10
Dependent Claim
28 words
A method in accordance with claim 7 wherein the control fluid is adjusted to introduce said control fluid at different pressures through different ones of the distributing means.
Claim 11
Dependent Claim
93 words
Apparatus for controlling the velocity profile of the working fluid of a fluid flow machine having a rotor and a working fluid inlet means, comprising; control fluid introduction means mounted in said inlet means a substantial distance from said said rotor, with respect to the direction of flow of said working fluid, and oriented to introduce said control fluid tangentially into said working fluid and restricting means in said working fluid inlet means to reduce the cross-sectional area of said working fluid inlet means between said rotor and said control fluid introduction means.
Claim 12
Dependent Claim
93 words
Apparatus for controlling the velocity profile of the working fluid of a fluid flow machine having a rotor and a working fluid inlet means, comprising; control fluid introduction means mounted in said inlet means a substantial distance from said said rotor, with respect to the direction of flow of said working fluid, and oriented to introduce said control fluid tangentially into said working fluid and restricting means in said working fluid inlet means to reduce the cross-sectional area of said working fluid inlet means between said rotor and said control fluid introduction means.
Claim 13
Dependent Claim
17 words
Apparatus in accordance with claim 10 wherein the fluid flow machine is of the radial flow type.
Claim 14
Dependent Claim
17 words
Apparatus in accordance with claim 10 wherein the fluid flow machine is of the axial flow type.
Claim 15
Dependent Claim
26 words
Apparatus in accordance with claim 10 wherein the control fluid introduction means is oriented to introduce control fluid in the direction of rotation of the rotor.
Claim 16
Dependent Claim
30 words
Apparatus in accordance with claim 10 wherein the control fluid introduction means is oriented to introduce control fluid in the direction opposite to the direction of rotation of the rotor.
Claim 17
Dependent Claim
44 words
Apparatus in accordance wiTh claim 10 wherein the control fluid introduction means is oriented to introduce control fluid both in a direction opposite to the direction of rotation of the rotor and in the same direction as the direction of rotation of said rotor.
Claim 18
Dependent Claim
36 words
Apparatus in accordance with claim 10 wherein the control fluid introduction means is a plurality of conduits radially disposed in the working fluid inlet means and said conduits at a plurality of distributing means spaced therealong.
Claim 19
Dependent Claim
19 words
Apparatus in accordance with claim 10 wherein a fluid control means is connected to the control fluid introduction means.
Claim 20
Dependent Claim
16 words
Apparatus in accordance with claim 17 wherein the fluid control means is a fluid amplifier system.
Claim 21
Dependent Claim
22 words
Apparatus in accordance with claim 17 wherein the fluid control means is connected to the pressure side of the fluid flow machine.
Claim 22
Dependent Claim
30 words
Apparatus in accordance with claim 17 wherein the fluid control means is connected to an external source of control fluid and to the pressure side of the fluid flow machine.
Claim 23
Dependent Claim
20 words
Apparatus in accordance with claim 17 wherein the fluid control means is connected to an external source of control fluid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |