CN110895174A - Dynamic torque measuring mechanism of turbine engine - Google Patents
Dynamic torque measuring mechanism of turbine engine Download PDFInfo
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- CN110895174A CN110895174A CN201911370599.7A CN201911370599A CN110895174A CN 110895174 A CN110895174 A CN 110895174A CN 201911370599 A CN201911370599 A CN 201911370599A CN 110895174 A CN110895174 A CN 110895174A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- 238000007619 statistical method Methods 0.000 description 1
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- 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
- G01L3/16—Rotary-absorption dynamometers, e.g. of brake type
- G01L3/20—Rotary-absorption dynamometers, e.g. of brake type fluid actuated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a dynamic torque measuring mechanism of a turbine engine, which comprises a turbine output shaft and a planetary reducer connected with the turbine output shaft, wherein the planetary reducer comprises an outer gear ring and a casing, and helical teeth are arranged on the outer circumferential surface of the outer gear ring along the circumferential direction of the outer gear ring; under the torque action of the turbine output shaft, the outer gear ring allows axial sliding on the helical teeth, pushes the oil cylinder piston to move axially to change the oil pressure in the oil hydraulic cylinder, and the torque value of the turbine output shaft can be obtained by measuring the oil pressure in the oil hydraulic cylinder. The dynamic torque measuring mechanism of the turbine engine realizes the torque measurement by the way that the gear ring axially slightly drives the oil pressure fluctuation, and has the advantages of novel structure, small measurement error, convenient use and good popularization and application values.
Description
Technical Field
The invention relates to the technical field of turbine engines, in particular to a dynamic torque measuring mechanism of a turbine engine.
Background
The turboprop is a gas turbine engine commonly used in an aircraft, and the driving principle of the turboprop is substantially the same as that of a conventional propeller aircraft using a piston engine as a power source, and the force generated when the propeller rotates is used as the propelling force for the aircraft to advance. Turboshaft engines, which are similar in operation and construction to turboprop engines, have evolved from the principles of turbofan engines, except that the latter convert the fan into a propeller, while the former convert the fan into a rotor of a helicopter.
The turboprop engine and the turboshaft engine are both external propulsion devices driven by output shaft power through a speed reducer, have complex internal structures, are the only assemblies running at high speed in an engine power system and are one of the parts with the highest failure rate. Statistical analysis shows that the faults of the turbine engine system account for a large proportion, wherein the increase of the friction torque of the output shaft of the engine and the damage of the bearing are two main reasons of the faults of the turbine engine, and for the turbine engine which is started for multiple times, whether the engine can complete the next starting safely and reliably after the starting of a certain time becomes a concern of researchers.
The torque on the output shaft of the turbine propeller and the turbine shaft engine exceeds a set value, which causes serious accidents such as shaft twist-off, engine in-air stop, propeller flying and the like, so the rotating torque of the output shaft of the turbine engine becomes a critical index for judging whether the turbine engine has faults, and a method for judging the fault possibility by measuring the rotating torque becomes an important means for rapidly detecting the state of the turbine engine, so that the torque on the output shaft of the turbine engine needs to be monitored in real time.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in response to the above-identified deficiencies in the prior art, a turbine engine dynamic torque measuring mechanism is provided.
The invention provides a dynamic torque measuring mechanism of a turbine engine, which is characterized in that the tooth profile of a fixed outer gear ring of a planetary reducer is designed into helical teeth, under the action of torque, the outer gear ring is allowed to axially slide for a small distance on the helical teeth to push a piston of an oil cylinder to axially move, so that the oil pressure in an oil pressure cylinder is changed, and the torque value can be obtained by measuring the oil pressure.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a dynamic torque measuring mechanism of a turbine engine, which comprises a turbine output shaft and a planetary reducer connected with the turbine output shaft, wherein the planetary reducer comprises an outer gear ring and a casing, and helical teeth are arranged on the outer circumferential surface of the outer gear ring along the circumferential direction of the outer gear ring;
under the torque action of the turbine output shaft, the outer gear ring allows axial sliding on the helical teeth, pushes the oil cylinder piston to move axially to change the oil pressure in the oil hydraulic cylinder, and the torque value of the turbine output shaft can be obtained by measuring the oil pressure in the oil hydraulic cylinder.
Furthermore, on the dynamic torque measuring mechanism of the turbine engine, a chute is formed in the inner side wall of the casing corresponding to the helical teeth, and the chute and the helical teeth are arranged in a certain gap.
Further, on the turbine engine dynamic torque measuring mechanism, the cylinder piston is arranged on the end face of the outer gear ring side, and the cylinder piston is connected with the oil hydraulic cylinder.
Further, on the dynamic torque measuring mechanism of the turbine engine, the axial sliding distance of the helical teeth is 1-50 μm.
Furthermore, on the turbine engine dynamic torque measuring mechanism, a pressure sensor is arranged in the oil hydraulic cylinder.
Further, on the turbine engine dynamic torque measuring mechanism, the turbine engine is a turboprop engine or a turboshaft engine.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
according to the dynamic torque measuring mechanism of the turbine engine, the tooth profile of the fixed outer gear ring of the planetary reducer is designed into the helical teeth, under the action of torque, the outer gear ring is allowed to axially slide for a small distance on the helical teeth to push the oil cylinder piston to axially move, so that the oil pressure in the oil pressure cylinder is changed, the oil pressure and the torque value are in a certain proportion, and the torque value can be obtained by measuring the oil pressure; the dynamic torque measuring mechanism of the turbine engine realizes the torque measurement mode by driving oil pressure fluctuation through axial micromotion of the gear ring, has the advantages of novel structure, small measurement error, convenience in use and good popularization and application values.
Drawings
FIG. 1 is a schematic cross-sectional structural view of a turbine engine dynamic torque measurement mechanism of the present invention;
wherein the reference symbols are:
1-external gear ring, 2-helical gear, 3-casing, 4-cylinder piston and 5-oil hydraulic cylinder.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.
Referring to fig. 1, the present embodiment provides a turbine engine dynamic torque measuring mechanism, including a turbine output shaft and a planetary reducer connected to the turbine output shaft, where the planetary reducer includes an outer gear ring 1 and a casing 3, and an outer circumferential surface of the outer gear ring 1 is provided with helical teeth 2 along a circumferential direction thereof; under the torque action of the turbine output shaft, the outer gear ring 1 allows axial slippage on the helical teeth 2 and pushes the oil cylinder piston 4 to move axially to change the oil pressure in the oil pressure cylinder 5, and the torque value of the turbine output shaft can be obtained by measuring the oil pressure in the oil pressure cylinder 5 because the oil pressure in the oil pressure cylinder 5 and the torque value to be measured are in a certain proportional relation. This turbine engine developments torque measurement mechanism drives the undulant mode that realizes the torque measurement of oil pressure through ring gear axial fine motion, novel structure, and measuring error is little, convenient to use.
In the present embodiment, please refer to fig. 1, a chute is formed on a position of the inner side wall of the casing 3 corresponding to the helical teeth 2, and the chute and the helical teeth 2 are arranged with a certain gap. The structural shape of the chute is matched with that of the helical teeth 2, so that the helical teeth 2 can axially move in the chute along with the change of the torque of an output shaft, the axial sliding distance of the helical teeth 2 is 1-50 mu m, the casing 3 is prevented from being in contact with the helical teeth 2 during axial movement, and the measurement accuracy is improved.
In this embodiment, please refer to fig. 1, the cylinder piston 4 is disposed on a side end surface of the external gear ring 1, and under the action of the torque, the external gear ring 1 and the helical teeth 2 thereon are allowed to axially slide for a small distance to push the cylinder piston 4 to generate an axial displacement in the axial moving process. And the oil cylinder piston 4 is connected with the oil hydraulic cylinder 5, the oil cylinder piston 4 synchronously causes the oil pressure of hydraulic oil in the oil hydraulic cylinder 5 to change in the moving process, and the torque value can be obtained by measuring the oil pressure.
In the present embodiment, it is assumed that the cylinder piston receives an axial force Fa ═ P × a, and the outer ring gear receives an axial force Fa ═ Fa; calculating according to the stress of the helical gear:
helical tooth circumferential force Ft ═ Fa' cot α;
torque T ═ Ft × d/2 ═ P × a × d cot α/2;
the method comprises the following steps of A, oil cylinder piston area, α, helical tooth angle, P, oil cylinder monitoring pressure value and d, helical tooth stress point diameter.
In the present embodiment, referring to fig. 1, a pressure sensor is disposed in the hydraulic cylinder 5, and the hydraulic pressure in the hydraulic cylinder 5 is measured in real time by the pressure sensor.
In this embodiment, the turbine engine is a turboprop or turboshaft engine. The dynamic torque measuring mechanism of the turbine engine is suitable for measuring the torque of the output shaft of the turboprop engine or the turboshaft engine.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (6)
1. A turbine engine dynamic torque measuring mechanism comprises a turbine output shaft and a planetary reducer connected with the turbine output shaft, and is characterized in that the planetary reducer comprises an outer gear ring (1) and a casing (3), and helical teeth (2) are arranged on the outer circumferential surface of the outer gear ring (1) along the circumferential direction of the outer gear ring;
under the torque action of the turbine output shaft, the outer gear ring (1) allows axial sliding on the helical teeth (2) and pushes the oil cylinder piston (4) to move axially to change the oil pressure in the oil hydraulic cylinder (5), and the torque value of the turbine output shaft can be obtained by measuring the oil pressure in the oil hydraulic cylinder (5).
2. The turbine engine dynamic torque measuring mechanism according to claim 1, characterized in that the inner side wall of the casing (3) is provided with a chute corresponding to the position of the helical teeth (2), and the chute is arranged with a certain gap from the helical teeth (2).
3. The turbine engine dynamic torque measuring mechanism according to claim 1, characterized in that the cylinder piston (4) is provided on the outer ring gear (1) side end face, and the cylinder piston (4) is connected to the oil hydraulic cylinder (5).
4. The turbine engine dynamic torque measuring mechanism according to claim 1, characterized in that the axial slip pitch of the helical teeth (2) is 1-50 μ ι η.
5. Turbine engine dynamic torque measuring mechanism according to claim 1, characterized in that a pressure sensor is arranged inside the oil hydraulic cylinder (5).
6. The turbine engine dynamic torque measuring mechanism of claim 1, wherein the turbine engine is a turboprop or turboshaft engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370599.7A CN110895174A (en) | 2019-12-26 | 2019-12-26 | Dynamic torque measuring mechanism of turbine engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370599.7A CN110895174A (en) | 2019-12-26 | 2019-12-26 | Dynamic torque measuring mechanism of turbine engine |
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| CN110895174A true CN110895174A (en) | 2020-03-20 |
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| CN201911370599.7A Pending CN110895174A (en) | 2019-12-26 | 2019-12-26 | Dynamic torque measuring mechanism of turbine engine |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB714339A (en) * | 1951-01-17 | 1954-08-25 | Charles Edward Kraus | Friction contact type speed changer |
| CN102996679A (en) * | 2012-11-26 | 2013-03-27 | 重庆长安汽车股份有限公司 | Hybrid electric vehicle, oil supply device for clutch hydraulic system and control system of oil supply device |
| WO2014037673A1 (en) * | 2012-09-06 | 2014-03-13 | Snecma | Turbine engine comprising a means for measuring the speed and torque of a shaft of the turbine engine and method for monitoring said shaft |
| RU165648U1 (en) * | 2016-05-31 | 2016-10-27 | Акционерное общество "Научно-производственный центр газотурбостроения "Салют" (АО "НПЦ газотурбостроения "Салют") | TEST FOR TURBO-SCREW ENGINES TEST |
| CN106198035A (en) * | 2016-08-26 | 2016-12-07 | 武汉航达航空科技发展有限公司 | Air turbine starter performance test apparatus |
| CN106706184A (en) * | 2017-01-06 | 2017-05-24 | 中国科学院工程热物理研究所 | Engine toque measuring device |
| CN208443512U (en) * | 2018-07-27 | 2019-01-29 | 杭州可盈智能设备有限公司 | Ring gear torque detection device |
| CN211205596U (en) * | 2019-12-26 | 2020-08-07 | 上海尚实能源科技有限公司 | Dynamic torque measuring mechanism of turbine engine |
-
2019
- 2019-12-26 CN CN201911370599.7A patent/CN110895174A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB714339A (en) * | 1951-01-17 | 1954-08-25 | Charles Edward Kraus | Friction contact type speed changer |
| WO2014037673A1 (en) * | 2012-09-06 | 2014-03-13 | Snecma | Turbine engine comprising a means for measuring the speed and torque of a shaft of the turbine engine and method for monitoring said shaft |
| CN102996679A (en) * | 2012-11-26 | 2013-03-27 | 重庆长安汽车股份有限公司 | Hybrid electric vehicle, oil supply device for clutch hydraulic system and control system of oil supply device |
| RU165648U1 (en) * | 2016-05-31 | 2016-10-27 | Акционерное общество "Научно-производственный центр газотурбостроения "Салют" (АО "НПЦ газотурбостроения "Салют") | TEST FOR TURBO-SCREW ENGINES TEST |
| CN106198035A (en) * | 2016-08-26 | 2016-12-07 | 武汉航达航空科技发展有限公司 | Air turbine starter performance test apparatus |
| CN106706184A (en) * | 2017-01-06 | 2017-05-24 | 中国科学院工程热物理研究所 | Engine toque measuring device |
| CN208443512U (en) * | 2018-07-27 | 2019-01-29 | 杭州可盈智能设备有限公司 | Ring gear torque detection device |
| CN211205596U (en) * | 2019-12-26 | 2020-08-07 | 上海尚实能源科技有限公司 | Dynamic torque measuring mechanism of turbine engine |
Non-Patent Citations (1)
| Title |
|---|
| KAZUO INOUE, 张迈仁 , 华觉源: "装有可变几何形状涡轮增压器的高功率、宽扭矩范围、高效率的发动机", 车用发动机, no. 05, pages 38 - 47 * |
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