WO2016038288A1 - Couplemètre hydraulique - Google Patents
Couplemètre hydraulique Download PDFInfo
- Publication number
- WO2016038288A1 WO2016038288A1 PCT/FR2015/052367 FR2015052367W WO2016038288A1 WO 2016038288 A1 WO2016038288 A1 WO 2016038288A1 FR 2015052367 W FR2015052367 W FR 2015052367W WO 2016038288 A1 WO2016038288 A1 WO 2016038288A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rod
- fluid
- torque
- membrane
- pressure
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
- G01L3/1485—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving fluidic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/12—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring axial thrust in a rotary shaft, e.g. of propulsion plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/60—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/83—Testing, e.g. methods, components or tools therefor
Definitions
- the invention relates to a hydraulic torque meter.
- the invention relates to a hydraulic torque meter for measuring a torque of a rotating shaft of a turbine engine of an aircraft.
- Torque meters are torque measuring devices that exist in many forms depending on the field of application, the equipment whose torque is to be measured and the degree of precision desired. In the field of aeronautics, hydraulic torque meters are frequently used. These torque meters operate for example through an intermediate gear with helical teeth, whose rotation causes an axial thrust proportional to the torque to be measured. This axial thrust is applied to a piston connected to the intermediate gear.
- the movement of the piston as a function of the measured torque causes a pressure on the oil in a measuring chamber fed by a hydraulic circuit until the pressure exerted by the piston on the oil and the oil on the piston is balanced.
- the measurement of the pressure at this equilibrium by a pressure sensor makes it possible to deduce the measured torque.
- this type of hydraulic torque meter requires for its proper functioning a seal between the hydraulic circuit and the other portions of the system.
- This seal is generally achieved by the addition of one or more O-rings, especially on the piston in motion, usually made of elastomer.
- minimum compression must be applied to the O-ring between the piston and the chamber wall. This compression nevertheless generates friction proportional to this compression which causes inaccuracies and can lead to hysteresis phenomena during measurements. This results in a conflict situation between a good seal and a lack of resistance force to allow the free movement of the piston in the chamber.
- gaskets of different materials such as polytetrafluoroethylene (better known under the acronym PTFE)
- PTFE polytetrafluoroethylene
- the invention aims to overcome at least some of the disadvantages of known torque meters.
- the invention aims to provide, in at least one embodiment of the invention, a torque meter for the suppression of friction due to the sealing means.
- the invention also aims to provide, in at least one embodiment, a torque meter that does not generate hysteresis phenomena.
- the invention also aims to provide, in at least one embodiment, a torque meter which ensures a seal and allows a reduction of friction during long operating phases.
- the invention relates to a hydraulic torque meter comprising: - a rod movable in translation in a longitudinal direction under the effect of an axial thrust representative of the torque to be measured, a hydraulic circuit in which a fluid circulates,
- a manometric capsule comprising: a pressure chamber supplied with fluid by said hydraulic circuit,
- a sealed flexible membrane in contact with the fluid of the pressure chamber, extending in a plane substantially perpendicular to said rod and integrally connected to said rod so that a longitudinal displacement of the rod causes a deformation of the membrane
- a fluid leakage orifice of said pressure chamber conjugated to a valve carried by one end of said movable rod for regulating the pressure of the fluid in said pressure chamber as a function of the deformation of said membrane.
- a torque meter according to the invention thus makes it possible, thanks to the deformation of a membrane which results from a translational movement of a movable rod, to guarantee the sealing of the pressure chamber comprising the fluid without, however, resorting to parts in relative motion whose friction could otherwise cause measurement errors (hysteresis).
- the seal is here static, only the membrane is deformed under the impulse of the displacement of the rod connected to the membrane.
- the rod may be integrally connected to the membrane, either by its end or by the periphery of said rod which passes through the membrane, or by a connecting piece between said rod and the membrane.
- the leakage orifice is conjugated to a valve carried by the rod. This means that the valve has a structure shaped to the leakage orifice. In other words, the orifice and the valve are configured to operate together. In practice, the valve is configured to be able to cover the leakage orifice and thus be able to regulate the pressure of the fluid in the pressure chamber.
- the membrane is formed of an elastic material so that the deformation of the membrane resulting from a translational movement of said movable rod is an elastic deformation.
- said rod is hollow and forms a portion of said hydraulic circuit.
- the size of the torque meter is reduced.
- said hollow rod passes through said flexible membrane and said fluid leakage orifice is formed at the end of said hollow rod.
- the size of the torque meter is reduced.
- the torque meter comprises conversion means adapted to apply to the rod the axial thrust representative of the torque to be measured.
- the axial thrust is generated by the conversion means so as to be proportional to the torque to be measured, so as to allow the moving rod to move.
- the torque meter comprises means for determining the torque as a function of the pressure of said fluid.
- the pressure of the fluid allows the deduction of the torque to be measured, for example by measuring the value of the pressure and then conversion, or by direct conversion of the pressure into information representing the torque, without direct measurement of the pressure value.
- the membrane is surrounded by a ring held in contact with a shoulder of the pressure chamber by a retaining ring.
- the ring, the shoulder and the ring make it possible to maintain the diaphragm in position statically, without displacement of element, which allows a good seal without problems of friction or hysteresis. .
- the invention also relates to a turbine engine comprising a shaft in rotation, characterized in that it comprises a hydraulic torque meter according to the invention, adapted to measure the torque of the shaft.
- the invention also relates to a torque meter and a turbine engine characterized in combination by all or some of the characteristics mentioned above or below.
- FIG. 1 is a diagrammatic representation of a hydraulic torque meter according to the state of the art
- FIG. 2 is a schematic representation of the operation of a hydraulic torque meter according to one embodiment of the invention
- FIG. 3 is a schematic representation of a hydraulic torque meter according to one embodiment of the invention. 6. Detailed description of an embodiment of the invention
- FIG. 1 represents a hydraulic torque meter 10 according to the state of the art. It comprises in particular a piston 12 movable in translation in a longitudinal direction, under the effect of an axial thrust representative of the torque to be measured.
- the axial thrust is transmitted on the upper part 14 of the piston, and is transmitted by the axis 16 of the piston to the head 18 of the cylindrical piston which is in contact with a fluid 20 and which moves in a hollow cylinder 22 of diameter slightly greater than the head 18 of the piston to allow movement thereof with minimal play.
- Fluid 20 circulates through a hydraulic supply circuit 24.
- the head 18 of the piston is equipped with an O-ring seal 26 surrounding the head 18 of the piston.
- piston and to fill the clearance between the head 18 of the piston and the hollow cylinder 22 to prevent the passage of the fluid 20, compressing the seal between the head 18 of the piston and the cylinder 22 hollow.
- a PTFE ring is interposed between the O-ring 26 and the cylinder 22. The compression of the sealing gasket 26 generates friction which adversely affects the quality of the measurement of the torque, and generates a hysteresis phenomenon.
- the invention solves these problems.
- torque meter 28 comprises a rod 30 movable in translation in a longitudinal direction under the effect of an axial thrust 31 representative of the torque to be measured.
- the movable rod 30 is integrally connected to a flexible membrane 32.
- the flexible membrane 32 extends in a plane substantially perpendicular to the rod 30.
- it is sealingly attached to the side walls 34 of a pressure chamber 36.
- This pressure chamber 36 is fed with a fluid 38 coming from a hydraulic circuit 40.
- the membrane 32 separates the pressure chamber 36 from a space 42 in which the moving rod 30 moves.
- the axial thrust 31 is representative of the torque to be measured.
- the torque meter 28 comprises for example conversion means adapted to apply the thrust 31 axial depending on the torque to be measured.
- these conversion means may comprise a helical gear intermediate gear located on the shaft line whose torque is to be measured.
- the torque transmitted by the intermediate gear produces, via the helical toothing, a thrust whose component in the axis of rotation is proportional to this torque: this normal component is the thrust 31 axial, transmitted to the rod 30 mobile.
- the displacement of the movable rod 30 due to the axial thrust 31 causes a deformation of the membrane 32 integral with the rod.
- the closure of the leakage section at a valve 48 carried by the end of the rod 30, raises the pressure of the fluid 38 in the chamber 36 to the equilibrium of the axial thrusts.
- the pressure of the fluid 38 is regulated in the pressure chamber 36 by a valve 48 varying the leakage section through the orifice 44.
- the pressure chamber 36, the membrane 32 and the leakage orifice 44 form a manometric capsule 46.
- the pressure of the fluid 38 is measured, for example by a pressure sensor.
- the information of the measured pressure can be transmitted to a user, for example via a display.
- the display can then either directly display the pressure value measured by the sensor, if the user knows or can easily deduce the torque value as a function of the displayed pressure value, or display a torque value calculated by means of determination of the torque as a function of the measured pressure, for example a calculator or other conversion system.
- the value of the pressure is not measured by a sensor but the pressure itself causes the display of the torque value on the display, for example by moving a needle on a display through a mechanism adapted, without direct measurement of the value of the pressure.
- FIG. 3 diagrammatically represents a hydraulic torque meter 28 according to the embodiment of the invention, taking up and detailing the elements described in FIG. 2.
- the movable rod 30 is connected to the membrane 32 by a bushing in which one end of the rod 30 mobile is depressed.
- the bushing pierced at its center, is attached to the membrane 32 all around its periphery in a sealed manner and forms the valve 48 which will regulate the hydraulic leak so as to balance the pressure in the chamber 36.
- the membrane 32 extends to to the side wall 34 of the pressure chamber 36.
- the membrane 32 is surrounded by a ring 50, in contact with a shoulder 52 of the side wall 34 of the pressure chamber 36.
- the ring 50 is held in contact with the shoulder 52 by a retaining ring 54.
- the ring 50, the shoulder 52 and the ring 54 seal the system. Unlike the piston and the seal of the prior art, the ring 50, the shoulder 52 and the ring 54 seal while being static and without having any role in the regulation of the fluid pressure 38 They do not thus have the disadvantages of the piston-seal system of the prior art.
- the invention is particularly intended to equip a turbine engine with an aircraft.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580047363.3A CN106716092A (zh) | 2014-09-08 | 2015-09-07 | 液压扭矩计 |
JP2017512803A JP2017527805A (ja) | 2014-09-08 | 2015-09-07 | 油圧式トルク計 |
RU2017108206A RU2017108206A (ru) | 2014-09-08 | 2015-09-07 | Гидравлический измеритель крутящего момента |
EP15771676.2A EP3194919A1 (fr) | 2014-09-08 | 2015-09-07 | Couplemètre hydraulique |
KR1020177006835A KR20170046689A (ko) | 2014-09-08 | 2015-09-07 | 유압식 토크미터 |
CA2959939A CA2959939A1 (fr) | 2014-09-08 | 2015-09-07 | Couplemetre hydraulique |
US15/508,807 US20170261390A1 (en) | 2014-09-08 | 2015-09-07 | Hydraulic torquemeter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1458370A FR3025602B1 (fr) | 2014-09-08 | 2014-09-08 | Couplemetre hydraulique |
FR1458370 | 2014-09-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016038288A1 true WO2016038288A1 (fr) | 2016-03-17 |
Family
ID=52465453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2015/052367 WO2016038288A1 (fr) | 2014-09-08 | 2015-09-07 | Couplemètre hydraulique |
Country Status (9)
Country | Link |
---|---|
US (1) | US20170261390A1 (fr) |
EP (1) | EP3194919A1 (fr) |
JP (1) | JP2017527805A (fr) |
KR (1) | KR20170046689A (fr) |
CN (1) | CN106716092A (fr) |
CA (1) | CA2959939A1 (fr) |
FR (1) | FR3025602B1 (fr) |
RU (1) | RU2017108206A (fr) |
WO (1) | WO2016038288A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3035502B1 (fr) * | 2015-04-27 | 2017-04-14 | Turbomeca | Couplemetre a mesure de deformation |
CN108548573B (zh) * | 2018-05-04 | 2024-03-08 | 湖南菲尔斯特传感器有限公司 | 差压式流量计 |
CN113194810A (zh) * | 2018-12-21 | 2021-07-30 | 托尼吉株式会社 | 测定测量对象物的内部压力的测定装置及测定方法 |
FR3110694B1 (fr) | 2020-05-19 | 2022-06-10 | Safran Helicopter Engines | Procede de fabrication d’un carter pour une turbomachine d’aeronef |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1580430A (en) * | 1924-04-14 | 1926-04-13 | Walter L Gaines | Dynamometer |
US2580162A (en) * | 1943-03-15 | 1951-12-25 | Power Jets Res & Dev Ltd | Load measuring device |
US3587304A (en) * | 1969-02-28 | 1971-06-28 | Avco Corp | Torque-indicating device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3633696A (en) * | 1970-10-15 | 1972-01-11 | United States Steel Corp | Load cell |
IT1401923B1 (it) * | 2010-09-09 | 2013-08-28 | Nuovo Pignone Spa | Metodi e dispositivi per testare un rotore a bassa velocita ed a basso momento in un turbomacchinario |
-
2014
- 2014-09-08 FR FR1458370A patent/FR3025602B1/fr active Active
-
2015
- 2015-09-07 KR KR1020177006835A patent/KR20170046689A/ko unknown
- 2015-09-07 EP EP15771676.2A patent/EP3194919A1/fr not_active Withdrawn
- 2015-09-07 CN CN201580047363.3A patent/CN106716092A/zh active Pending
- 2015-09-07 WO PCT/FR2015/052367 patent/WO2016038288A1/fr active Application Filing
- 2015-09-07 JP JP2017512803A patent/JP2017527805A/ja active Pending
- 2015-09-07 CA CA2959939A patent/CA2959939A1/fr not_active Abandoned
- 2015-09-07 US US15/508,807 patent/US20170261390A1/en not_active Abandoned
- 2015-09-07 RU RU2017108206A patent/RU2017108206A/ru not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1580430A (en) * | 1924-04-14 | 1926-04-13 | Walter L Gaines | Dynamometer |
US2580162A (en) * | 1943-03-15 | 1951-12-25 | Power Jets Res & Dev Ltd | Load measuring device |
US3587304A (en) * | 1969-02-28 | 1971-06-28 | Avco Corp | Torque-indicating device |
Also Published As
Publication number | Publication date |
---|---|
EP3194919A1 (fr) | 2017-07-26 |
CA2959939A1 (fr) | 2016-03-17 |
CN106716092A (zh) | 2017-05-24 |
JP2017527805A (ja) | 2017-09-21 |
KR20170046689A (ko) | 2017-05-02 |
FR3025602A1 (fr) | 2016-03-11 |
US20170261390A1 (en) | 2017-09-14 |
FR3025602B1 (fr) | 2016-11-04 |
RU2017108206A (ru) | 2018-10-11 |
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