WO2017150190A1 - Dispositif de mesure de couple, boîte de vitesses et procédé de mesure de couple - Google Patents

Dispositif de mesure de couple, boîte de vitesses et procédé de mesure de couple Download PDF

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Publication number
WO2017150190A1
WO2017150190A1 PCT/JP2017/005519 JP2017005519W WO2017150190A1 WO 2017150190 A1 WO2017150190 A1 WO 2017150190A1 JP 2017005519 W JP2017005519 W JP 2017005519W WO 2017150190 A1 WO2017150190 A1 WO 2017150190A1
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WO
WIPO (PCT)
Prior art keywords
torque
shaft
sensor
vibration
axis
Prior art date
Application number
PCT/JP2017/005519
Other languages
English (en)
Japanese (ja)
Inventor
直之 長井
泰憲 時政
成人 原田
直人 米村
Original Assignee
三菱重工コンプレッサ株式会社
三菱重工業株式会社
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.)
Filing date
Publication date
Application filed by 三菱重工コンプレッサ株式会社, 三菱重工業株式会社 filed Critical 三菱重工コンプレッサ株式会社
Publication of WO2017150190A1 publication Critical patent/WO2017150190A1/fr

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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
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass

Definitions

  • a rotating device such as a compressor or a pump
  • a drive device that generates torque fluctuation
  • torque fluctuation of the motor or the like may be transmitted to the rotating shaft and torsional vibration may occur.
  • torsional vibration increases, problems such as breakage of the rotating shaft occur. Therefore, the rotating shaft connected to the rotating machine is measured in advance to determine how much the torque fluctuation is, and is designed so that it can cope with torsional vibration.
  • a load cell torque meter
  • a strain gauge is attached to the surface of the shaft.
  • an encoder or the like is provided at the shaft end, and torque fluctuation is measured from a pulse train measured by the encoder.
  • a telemeter, a slip ring, and the like are necessary to transmit a measurement signal from the rotating system to the stationary system.
  • a battery is required to operate the slip ring.
  • Patent Document 1 describes a method for evaluating a failure state of a rotating shaft by providing a torque sensor on the rotating shaft and monitoring torque vibration of the rotating shaft.
  • the present invention provides a torque measuring device, a gear box, and a torque measuring method capable of solving the above-described problems.
  • the torque measuring device includes a sensor for measuring vibration of at least one of the first shaft connected to the rotating machine and the second shaft rotating in conjunction with the first shaft;
  • a torque calculation unit that calculates a torque applied to a target axis, which is an axis for which the sensor measures vibration information, of the first axis and the second axis based on vibration information measured by the sensor.
  • the vibration of the first axis or the second axis that rotates in conjunction with the first axis can be measured by the sensor provided in the stationary system, so when monitoring torque fluctuations over the long term But maintenance is easy.
  • a mechanism for interlocking the first axis and the second axis is provided with sensors for measuring vibrations in advance on both axes, and in that case, no new sensor needs to be installed.
  • the torque calculation unit may calculate the torque by multiplying the measured value measured by the sensor by a predetermined conversion coefficient.
  • the torque can be calculated by measuring the amplitude of the shaft vibration based on the proportional relationship between the amplitude of the shaft vibration corresponding to the torsional vibration and the torque.
  • the fourth aspect of the present invention further comprises a filter unit that extracts vibration information related to the torsional natural frequency of the target shaft from the vibration information measured by the sensor, and the torque calculation unit includes the filter unit.
  • the torque applied to the target shaft may be calculated based on the extracted vibration information.
  • the first shaft and the second shaft may be interlocked by a gear.
  • the torque can be calculated using a configuration in which power is transmitted by the gear between the first shaft and the second shaft.
  • the senor may measure the meshing tangential vibration of the gear.
  • the torque can be calculated by measuring the meshing tangential vibration of the gear effective for measuring the torque fluctuation causing the torsional vibration using the power transmission mechanism by the gear. .
  • the torque calculation unit includes a predetermined relationship between the torque applied to the first shaft and the torque applied to the second shaft, and the torque applied to the target shaft. Based on the above, the torque applied to the shaft on the side different from the target shaft may be calculated. According to the above configuration, torque can also be calculated for other rotating shafts that rotate in conjunction with the rotating shaft that has measured the shaft vibration by the sensor.
  • the torque calculation unit calculates the torque of at least one of the first axis and the second axis based on vibration information measured by the sensor, and for a predetermined period.
  • the torque fluctuation may be calculated based on the torque calculated over time. According to the said structure, the torque fluctuation which arises in the rotating shaft of monitoring object can be monitored for a long term.
  • the torque measuring device is a shaft vibration sensor provided in a gear box to which a rotating shaft that monitors torque fluctuation related to torsional vibration is connected, and the gear box houses A shaft vibration sensor provided so that the meshing reaction force direction of the rotating gear is the detection direction of the shaft vibration sensor, and vibration related to the torsional natural frequency of the rotating shaft from vibration information measured by the shaft vibration sensor A filter unit that extracts information; and a torque calculation unit that calculates a torque of the rotary shaft by multiplying a displacement amount of the rotary shaft indicated by the vibration information extracted by the filter unit by a predetermined conversion coefficient.
  • the torque of the target rotation shaft can be calculated by using a gear box such as an increase / decrease included in the rotation shaft system and a shaft vibration sensor provided in advance in the gear box.
  • the gear box may include the torque measuring device according to the tenth aspect. According to the said structure, the gear box can measure the torque fluctuation of the rotating shaft connected with the own apparatus.
  • a sensor measures vibration of at least one of a first shaft connected to a rotating machine and a second shaft rotating in conjunction with the first shaft, and the vibration measured by the sensor.
  • This is a torque measurement method in which, based on the information, the torque applied to the shaft on which the sensor measures vibration information is calculated.
  • a second shaft that rotates in conjunction with a first shaft connected to a rotating machine is mounted, vibration of the second shaft is measured by a sensor, and vibration information measured by the sensor is measured.
  • the torque measurement method may calculate a torque applied to the second shaft based on the torque and calculate a torque applied to the first shaft based on the torque applied to the second shaft.
  • variation can be measured also about the rotating shaft which is not connected with power transmission mechanisms, such as a gear box.
  • the torque fluctuation generated on the rotating shaft can be measured over a long period of time.
  • FIG. 1 is a schematic diagram of a rotating shaft system in the first embodiment according to the present invention.
  • the rotary shaft system 1 includes a motor 8 as a power source, a rotary shaft 7 connected to the motor 8, and a rotary shaft 5 connected to the rotary shaft 7 to rotate the rotary shaft 7.
  • the speed increasing / decreasing device 6 that increases or decelerates the number of rotations and transmits it to the rotating shaft 5, the rotating shaft 5 that is rotated by the speed increasing / decreasing device 6, the coupling 4 that connects the rotating shaft 5 and the rotating shaft 3, and the rotating shaft 3
  • the pump 2 that is operated by the power of the motor 8 transmitted through the rotating shaft 3 and the like
  • the analyzer 10 that measures the torque applied to the rotating shafts 5 and 7.
  • torque fluctuation occurs when the motor 8 and the pump 2 are started or when the rotational speed is changed. In that case, the torsional vibration due to the torque fluctuation occurs in the rotating shafts 5 and 7, and in the worst case, there is a possibility that the rotating shaft 5 breaks down.
  • the analyzer 10 continuously calculates the torque applied to the rotating shaft 5 and the like.
  • the torque measuring device 20 (not shown) includes a sensor provided in the speed increase / decrease device 6 and the analysis device 10. The torque measuring device 20 will be described later.
  • FIG. 2 is a diagram showing an example of a cross section of the speed increasing / decreasing device according to the first embodiment of the present invention.
  • the gear 6 ⁇ / b> A included in the speed increasing / decreasing device 6 is connected to the rotating shaft 7, and the gear 6 ⁇ / b> B is connected to the rotating shaft 5.
  • Sensors S1 and S2 are vibration sensors.
  • the speed increasing / decreasing device 6 is often provided with a vibration sensor for measuring the vibration of the shaft.
  • the vibration sensor for example, an eddy current non-contact displacement sensor is used.
  • the non-contact displacement sensor measures the distance to the measurement target (rotating shaft 7), and measures vibration information (amplitude and vibration frequency) based on the variation in the measured distance.
  • the senor S1 is installed so that the direction in which the vibration is detected is directed to the direction in which the vibration on the line K is detected (for example, the direction of the arrow K1). Thereby, the sensor S1 directed in the direction of the arrow K1 measures the vibration on the line K of the rotating shaft 7.
  • FIG. 5 is a diagram showing the relationship between the measurement result of the sensor and the torque in the first embodiment according to the present invention.
  • FIG. 5 is a graph plotting the amount of displacement (amplitude) in the axial vibration of the rotating shaft 7 measured by the sensor S1 and the measured value of the torque generated on the rotating shaft 7 by the strain gauge performed in parallel with the measurement by the sensor S1. It is.
  • the horizontal axis in FIG. 5 indicates the amount of axial vibration displacement of the rotary shaft 7, and the vertical axis indicates the torque generated on the rotary shaft 7.
  • the displacement amount of the shaft vibration caused by torque fluctuation and the fluctuation torque at that time are in a linear relationship (proportional).
  • the torque calculation unit 12 includes a predetermined torque applied to the first axis and a torque applied to the second axis. Based on this relationship, the torque fluctuation of the first shaft (not shown in FIG. 6) may be calculated.
  • the predetermined relationship between the torque applied to the first shaft and the torque applied to the second shaft is, for example, a gear ratio between the gear P1 and the gear P2, or, for example, a strain in each of the first shaft and the second shaft in advance. It may be a relationship obtained from the result of actual measurement with a gauge attached.
  • the torque measuring device 20 of the present embodiment the torque of the rotating shaft is obtained by using the speed increasing / decreasing device 6 included in a part of the rotating shaft system and the non-contact type displacement sensor provided in the speed increasing / decreasing device 6. Variations can be measured. With this method, there is no need to install a new sensor. The conversion coefficient indicating the relationship between torque and shaft vibration does not change over a long period of time, and long-term monitoring is possible.
  • a torque measuring device according to a second embodiment of the present invention will be described with reference to FIGS.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the first embodiment is based on the premise that the rotary shaft system 1 includes a power transmission mechanism such as the speed increase / decrease device 6.
  • a method for measuring torque fluctuation occurring in a rotating shaft system that does not include a power transmission mechanism will be described.
  • the auxiliary device H1 used for monitoring the torque fluctuation of the rotary shaft Q1 that does not have a power transmission mechanism includes a rotary shaft H2, a gear H3, and a sensor S1.
  • a gear H3 is formed on the outer periphery of the rotation shaft H2, and transmits power to the gear Q2 formed on the rotation shaft Q1.
  • the rotation shaft H2, the gear H3, and the sensor S1 are housed in a gear box H4.
  • the sensor S1 is supported by the gear box H4 so as to face the center of the rotation shaft H2 from the meshing tangent direction of the gear Q2 and the gear H3. Yes.
  • the above-described gear Q2 is formed to mesh with the gear H3.
  • the sensor S ⁇ b> 1 is connected to the analyzer 10.
  • auxiliary device H1 including a gear H3 configured to mesh with a gear Q2 provided on the rotation shaft Q1 to be monitored is attached to the rotation shaft Q1, and the rotation shaft By measuring the shaft vibration of H2 by the sensor S1, the torque fluctuation generated on the rotating shaft Q1 is estimated. According to the present embodiment, it is possible to measure long-term torque fluctuations in a rotating shaft system that does not include a power transmission mechanism. By reducing the size of the external auxiliary device H1, an increase in the size of the monitoring system can be prevented.
  • the filter unit 11 passes the acquired vibration information through a bandpass filter and extracts only the frequency component corresponding to the torsional natural frequency of the rotating shaft H2 (step S24).
  • the torque calculation unit 12 acquires vibration information of the frequency component extracted by the filter unit 11.
  • the torque calculation unit 12 calculates the torque applied to the rotating shaft H2 by multiplying the amplitude of the acquired vibration information by the conversion coefficient ⁇ (step S25).
  • the torque calculator 12 calculates the torque applied to the target rotating shaft (rotating shaft Q1) based on the relationship between the torque applied to the rotating shaft H2 and the torque applied to the rotating shaft Q1 (step S26).
  • the position where the auxiliary device H1 is attached to one rotating shaft system is determined from the vibration mode of the target rotating shaft system, and the number thereof may be two or more. For example, if a position that is vulnerable to torsional vibration is known by calculation, the auxiliary device H1 can be designed to be mounted at that position. In a single-axis rotating shaft system, it is often difficult to narrow down a position that may cause damage due to torsional vibration to one location. According to the present embodiment, by providing a plurality of positions where the auxiliary device H1 is mounted, it is possible to easily perform monitoring at a position where excessive torsional vibration may occur.
  • the mechanism for interlocking the rotation shaft H2 and the rotation shaft Q1 may be a chain or a belt other than the gear.
  • the torque fluctuation generated on the rotating shaft can be measured over a long period of time.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

La présente invention concerne un dispositif de mesure de couple qui comprend : un capteur qui mesure l'oscillation d'au moins l'un d'un premier arbre qui est raccordé à un mécanisme rotatif, et un deuxième arbre qui tourne conjointement avec le premier arbre ; et une unité de calcul de couple qui, sur la base d'informations de vibration mesurées par le capteur, calcule le couple qui est appliqué à l'arbre pour lequel le capteur a mesuré les informations de vibration.
PCT/JP2017/005519 2016-02-29 2017-02-15 Dispositif de mesure de couple, boîte de vitesses et procédé de mesure de couple WO2017150190A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016037760A JP2017156151A (ja) 2016-02-29 2016-02-29 トルク計測装置、歯車箱及びトルク計測方法
JP2016-037760 2016-02-29

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Publication Number Publication Date
WO2017150190A1 true WO2017150190A1 (fr) 2017-09-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11824049B2 (en) 2018-02-07 2023-11-21 Lg Electronics Inc. Display device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019072806A (ja) * 2017-10-17 2019-05-16 オムロン株式会社 切削加工装置
JP7077780B2 (ja) * 2018-05-28 2022-05-31 セイコーエプソン株式会社 モーターユニット、印刷装置
JP2020175459A (ja) * 2019-04-17 2020-10-29 オムロン株式会社 切削工具の摩耗検出方法および切削加工装置
JP7213137B2 (ja) * 2019-05-10 2023-01-26 日立造船株式会社 二軸混練押出機の減速装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370958A (en) * 1976-12-07 1978-06-23 Mitsubishi Electric Corp Rolling mill shaft watching device
JPS6266134A (ja) * 1985-09-19 1987-03-25 Daido Steel Co Ltd ゼンマイトルクの測定方法
JP2005156326A (ja) * 2003-11-25 2005-06-16 Ricoh Co Ltd はすば歯車トルクムラ評価装置およびはすば歯車形状精度評価装置
JP2007003507A (ja) * 2005-05-25 2007-01-11 Tokyo Institute Of Technology 歯車検査装置
US20120067138A1 (en) * 2010-03-19 2012-03-22 Winergy Ag Method for detecting torque in a transmission, measuring device and control program

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370958A (en) * 1976-12-07 1978-06-23 Mitsubishi Electric Corp Rolling mill shaft watching device
JPS6266134A (ja) * 1985-09-19 1987-03-25 Daido Steel Co Ltd ゼンマイトルクの測定方法
JP2005156326A (ja) * 2003-11-25 2005-06-16 Ricoh Co Ltd はすば歯車トルクムラ評価装置およびはすば歯車形状精度評価装置
JP2007003507A (ja) * 2005-05-25 2007-01-11 Tokyo Institute Of Technology 歯車検査装置
US20120067138A1 (en) * 2010-03-19 2012-03-22 Winergy Ag Method for detecting torque in a transmission, measuring device and control program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11824049B2 (en) 2018-02-07 2023-11-21 Lg Electronics Inc. Display device

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