CN2694245Y - Rotation axis load sensing transducer - Google Patents
Rotation axis load sensing transducer Download PDFInfo
- Publication number
- CN2694245Y CN2694245Y CN 200420007415 CN200420007415U CN2694245Y CN 2694245 Y CN2694245 Y CN 2694245Y CN 200420007415 CN200420007415 CN 200420007415 CN 200420007415 U CN200420007415 U CN 200420007415U CN 2694245 Y CN2694245 Y CN 2694245Y
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- bearing assembly
- axle load
- bearing
- turning axle
- circuit
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Abstract
The utility model relates to the field of a sensor, in particular to provide a rotation-shaft load sensor including: two drive shafts, at least two bearing assemblies for supporting two drive shafts, a casing for packaging the bearing assemblies, and a signal detecting circuit for detecting axle load arranged on the drive shafts. The utility model also comprises an insulating sleeve arranged between the shaft and the bearing assembly and between the bearing assembly and the casing. The signal detecting circuit is electrically connected with a working power supply and an output terminal via the bearing assemblies which are coated with conducting lubricant grease to guarantee reliable conductivity and bearing lubrication. The signal detecting circuit is composed of a strain gauge bridge and an operating circuit, and the strain signal is detected and magnified for transforming output.
Description
Technical field
The utility model relates to sensor field, and a kind of turning axle load transducer is provided especially.
Background technology
The turning axle load transducer can be divided into axial force transducer and moment of torsion (torque) sensor two big classes.
The axial rotary force transducer is mainly used to measure the suffered axial force of turning axle, as the suffered gravity of oil-well rig drilling rod, the drill bit pressure to the rock stratum, the thrust that the screw mechanism screw shaft is suffered etc.The current axial rotary force transducer of using morely uses brush-slip ring conduction more, and its relative merits are identical with following the 3rd kind of rotary torque sensor.
The rotary torque sensor is mainly used in the torque load of measuring rotating machinery shaft.The kind of rotating machinery is a lot, as petrol engine, diesel motor, motor, oil motor, water turbine, steam turbine etc.By measuring the moment of torsion and the rotating speed of output shaft, can calculate the output power of axle.In many important driving-chains, also monitor the moment of torsion of axle with torque sensor, prevent that moment of torsion is excessive and cause the damage of machinery, as the drilling rod protection of oil-well rig, the torque protection of electrically operated valve etc.In industrial automation control and metrology and measurement field, the rotary torque sensor all is very important measurement mechanism.
Mechanical axis will bear moment of torsion on the one hand, and again in rotation, this has brought certain degree of difficulty with regard to the measurement of giving rotary torque on the other hand.The more rotary torque sensor of current usefulness has following three kinds:
1, phase-difference type rotary torque sensor.
At the two ends of turning axle two groups of on all four gears of the number of teeth, shape and setting angle are housed, are not having under the situation of moment of torsion, tooth and tooth complete matching, between do not have phase differential.When axle is subjected to time spent of doing of moment of torsion, because the distortion of axle will produce relative rotation between two gears,, measure two phase differential between the gear by measurement means such as contactless light or magnetic, just can extrapolate corresponding torque.
The advantage of this device is: noncontacting measurement, in measuring process, can not bring additional friction, and do not influence the sensitive territory and the precision of device.
Shortcoming is: in order to obtain enough sensitivity, axle must be done longlyer, and volume is big, Heavy Weight, and low-speed performance is undesirable.
2, induction rotary torque sensor.
This class sensor is experienced the suffered moment of torsion of axle with resistance strain gage, and foil gauge and electronic circuit are housed on axle, and and axle rotation together.Two pairs of electromagnetic induction coils are housed on stator and the rotor, a pair ofly are used for power supply excitation, required power supply on the supply shaft, another is to being used for signal output.
The advantage of this device is: heed contacted measure, there is not additional friction, and do not influence sensitive territory and precision, can be used at a high speed and measure down.Volume is little, and is in light weight, can reach certain precision, is the main product that current rotary torque is measured.
Shortcoming is: complex structure, and the cost height, moment of inertia is big, and dynamic following is poor.Under high speed, use, very high to dynamically balanced requirement.
3, brush-sliding ring type rotary torque sensor.
This class device also is to experience moment of torsion by the foil gauge on the axle, and difference is: the required power supply of strain gauge bridge and electronic circuit on the axle, and the output of signal all is to realize by the brush-slip ring of contact.
The advantage of this device is: simple in structure, and easily processing, cost is low, and dynamic following is good, and is also not high to dynamically balanced requirement.
Shortcoming is: because brush-slip ring belongs to the friction contact in rotatablely moving, for guaranteeing the reliability of conduction, must add certain pressure again, this has just strengthened friction, has also increased the weight of wearing and tearing.The life-span of complete machine is shorter.And under the situation of vibration and impact, the easy tripping of brush causes outage, the influence that output signal is cut off the power supply and brush contact resistance changes, and higher hamonic wave is more.Generally can only be used in the following wheel measuring of middling speed, limit its usable range.
In sum, the volume and weight of first kind of phase difference sensor is all bigger, and the occasion that is restricted at volume and weight is just not too suitable, obvious second and the 3 two kind of strain-type be better than first kind.This just in practice strain-type replacing the reason of phase-difference type gradually.Next two kinds of strain gauge transducers are compared, if can overcome the shortcoming of the third brush-sliding ring type, prolong the life-span of sensor, improve quality of signals, enlarge high-revolving range of application, then can have very strong competitive power.
Summary of the invention
The utility model improves many deficiencies of existing rotary load transducer, and a kind of rotary load transducer is provided, and comprising:
Transmission shaft, at least two encapsulate the housing of bearing assembly to the passive bearing assembly of transmission shaft, and are arranged on the signal deteching circuit that detects axle load on the transmission shaft;
Described sensor also includes insulation sleeve, is arranged between axle and bearing assembly and bearing assembly and the housing;
Described signal deteching circuit is electrically connected on working power and output terminal through bearing assembly.
Scribble conductive lubricating oil fat in the described bearing assembly, to guarantee reliable conduction and bearing lubrication.
Described signal deteching circuit is made up of strain gauge bridge and operating circuit, detects strain signal and amplifies conversion output.
It is two that described signal deteching circuit can be arranged in parallel, and the input/output terminal of each testing circuit is a diode in sequential series respectively, makes the current opposite in direction of two testing circuits of flowing through, to form two remaining turning axle load transducers.
Described bearing assembly is rolling bearing assembly or slide bearing assembly.
Described axle load is one of axial force and moment of torsion (torque) or combination.
When only with two bearing assemblies, can make the rotary load transmitter of two-wire system 4-20mA output.And, can make the transmitter of Sefe antiexplosion type because the output of 4-20mA is arranged.
Rotary load transducer described in the utility model has the following advantages:
1, with insulation sleeve existing bearing assembly and housing and axle on the brush-sliding ring type rotation load transducer are kept apart, make it both can be used for the rotation of bolster, can conduct electricity again, fundamentally cancelled the brush-slip ring of easy wearing and tearing.
2, between tumbler and static element, scribble special-purpose, not only can lubricating bearings but also the conduction grease that can conduct electricity, sensor life-time is greatly prolonged, also significantly improved the reliability and the quality of signals of conduction.
3, when using rolling bearing, this rotary load transducer can use under high rotating speed.
During 4, only with two bearing assemblies, can make the rotary load transmitter of two-wire system 4～20mA output.
If 5 are equipped with two covers fully independently electric bridge and circuit on axle, isolate with diode reverse, can constitute high two remainings (dual fail-safe) system of reliability.When a cover system has fault,, just can start another set of system works as long as power positive cathode and load one are changed.
6, because the output of 4～20mA is arranged, just can make the rotary load transmitter of Sefe antiexplosion type.
Description of drawings
Below with specific embodiment and be described with reference to the accompanying drawings the utility model.
Fig. 1 is embodiment one a described axial rotary force transducer, the structural drawing when selecting sliding bearing for use;
Fig. 2 is embodiment one a described axial rotary force transducer, selects the structural drawing of rolling bearing for use;
Fig. 3 sliding bearing (or rolling bearing outer shroud) and housing isolation structure synoptic diagram;
Fig. 4 sliding bearing annulate shaft (or encircling in the rolling bearing) and axle isolation structure synoptic diagram;
Fig. 5 is that the circuit of two described pairs of remaining transmitters of embodiment links figure;
Fig. 6 is embodiment three described rotary torque sensor construction figure;
Fig. 7 is embodiment three specific embodiment circuit diagrams.
Detailed description of main elements:
1, turning axle; 2, housing; 3,4, insulation sleeve; 5, ground wire; 6, the axle sleeve of sliding bearing (or interior ring of rolling bearing); 7, sliding bearing (or outer shroud of rolling bearing), 8, strain gauge bridge; 9, electronic circuit; 10, positive power line; 11, negative power line (signal wire of holding concurrently).
Embodiment
Embodiment one: the axial rotary force transducer
As shown in Figure 1 and Figure 2, Fig. 1, Fig. 2 are project organization figure.Bearing among Fig. 1 is a sliding bearing, and Fig. 2 structure is a rolling bearing.Concrete structure comprises: 1, turning axle; 2, housing; 3,4, insulation sleeve; 5, ground wire; 6, the axle sleeve of sliding bearing (or interior ring of rolling bearing); 7, sliding bearing (or outer shroud of rolling bearing), 8, strain gauge bridge; 9, electronic circuit; 10, positive power line; 11, negative power line (signal wire of holding concurrently).Bearing assembly comprises that two rolling bearings or two sliding axles undertake, lay respectively at the two ends of axle, the rotation of back shaft and as the conducting terminal of electric part, put with turning axle 1 and housing 2 with insulation sleeve 3,4 and to make electrical isolation, for guaranteeing the lubricated of reliable conduction and bearing, scribble special-purpose conductive lubricating oil fat in the bearing; Strain gauge bridge and electronic circuit are formed signal deteching circuit, be fixed on the axle and rotate together with the axis, function is to connect power supply, detect axial load, and simultaneously with strain signal amplification, conversion and be fed to output terminal, its two ends are electrically connected at the position of fixedlying connected with axle on the bearings at both ends respectively; When bearing is a sliding axle when undertaking, the two ends of testing circuit are electrically connected on the axle sleeve of sliding bearing, and the positive and negative end of power supply is connected on two sliding bearings; When bearing was rolling bearing, the two ends of testing circuit were electrically connected on the interior ring of bearing, and the positive and negative end of power supply is connected on two outer races accordingly, negative power line double as signal wire.
As shown in Figure 3, Figure 4, insulation sleeve is installed between axle and the bearing assembly and between bearing assembly and the housing.Fig. 3 is sliding bearing (or rolling bearing outer shroud) and housing isolation structure synoptic diagram; Fig. 4 is the axle sleeve (or encircling in the rolling bearing) and the axle isolation structure synoptic diagram of sliding bearing.
When axle was subjected to axial tension or pressure, the strain gauge bridge on the axle detected the strain signal that these power cause, amplification, conversion by electronic circuit become required output signal, are fed to output terminal.
Embodiment two: two remaining rotary torque transmitters
The physical construction of present embodiment is identical with Fig. 2, circuit part posts the identical strain gauge bridge of two covers as shown in Figure 5 on turning axle, the identical electronic circuit of two covers is housed, it is identical but signal deteching circuit independently mutually constitutes two remaining rotary torque transmitters to form two covers.The input/output terminal of every cover testing circuit is a diode in sequential series respectively, make the current opposite in direction of two testing circuits of flowing through, be isolated from each other, when circuit kit breaks down cisco unity malfunction, the field staff can exchange the positive and negative end of power supply easily, pull-up resistor is moved on to new negative terminal, just can start another set of circuit working.
When only with two bearing assemblies, can make the rotary load transmitter of two-wire system 4-20mA output.And, can make the transmitter of Sefe antiexplosion type because the output of 4-20mA is arranged.
Embodiment three: the rotary torque sensor
Fig. 6 is present embodiment project organization figure, is used to measure the moment of torsion of turning axle.Specifically comprise: turning axle 1; Housing 2; The axle sleeve 6 of sliding bearing; Sliding bearing 7, and strain gauge bridge; Insulation sleeve; Ground wire; Electronic circuit; Positive power line; Negative power line (signal wire of holding concurrently).Bearing assembly comprises that two sliding axles undertake, lay respectively at the two ends of axle, put with turning axle and housing with insulation sleeve and to make electrical isolation, the rotation of back shaft and as the conducting terminal of electric part, for guaranteeing the lubricated of reliable conduction and bearing, scribble special-purpose conductive lubricating oil fat in the bearing; Strain gauge bridge and electronic circuit are formed signal deteching circuit, be fixed on the axle and rotate together with the axis, function is to connect power supply, the suffered moment of torsion of detection axle, with strain signal amplification, conversion and be fed to output terminal, its input/output terminal is electrically connected at the position of fixedlying connected with axle on the bearings at both ends respectively simultaneously; The two ends of testing circuit are electrically connected on the axle sleeve of sliding bearing, and the positive and negative end of power supply is connected on two sliding bearings; Negative power line double as signal wire.
As shown in Figure 3, Figure 4, insulation sleeve is installed between axle and the bearing assembly and between bearing assembly and the housing.When axle was subjected to moment of torsion, strain gauge bridge detected the strain signal that moment of torsion causes, amplification, conversion by electronic circuit become required output signal, are fed to output terminal.
Fig. 7 is the employed electronic circuit of this sensor.XTR106 is special-purpose integrated circuit modules among the figure, its function is the weak signal that strain gauge bridge is measured, and converts the standard transducer signal of 4-20mA to, passes through power supply negative terminal, be sent to sample resistance, be fed to computing machine by sample resistance again or Displaying Meter gets on.The power supply 24V that Fig. 7 the right is marked connects power positive end, and 0V receives power supply negative terminal after accessing sample resistance again.
The described torque sensor of present embodiment, the high engine speed range of the 6000rpm that can work, precision can reach 0.5%.
Claims (7)
1, a kind of turning axle load transducer comprises: transmission shaft, and at least two encapsulate the housing of bearing assembly to the passive bearing assembly of transmission shaft, and are arranged on the signal deteching circuit that detects axle load on the transmission shaft, it is characterized in that:
Described sensor also includes insulation sleeve, is arranged between axle and bearing assembly and bearing assembly and the housing;
Described signal deteching circuit is electrically connected at working power and output terminal through bearing assembly.
2, turning axle load transducer as claimed in claim 1 is characterized in that: scribble conductive lubricating oil fat in the described bearing assembly, to guarantee reliable conduction and bearing lubrication.
3, turning axle load transducer as claimed in claim 1, it is characterized in that: described signal deteching circuit is made up of strain gauge bridge and operating circuit, detects strain signal and amplifies conversion output.
4, turning axle load transducer as claimed in claim 1, it is characterized in that: it is two that described signal deteching circuit can be arranged in parallel, the input/output terminal of each testing circuit is a diode in sequential series respectively, make the current opposite in direction of two testing circuits of flowing through, to form two remaining turning axle load transducers.
5, as claim 1---4 any described turning axle load transducers is characterized in that: when using two bearing assemblies, sensor is output as two-wire system 4～20mA.
6, turning axle load transducer as claimed in claim 1 is characterized in that: described bearing assembly is that rolling bearing assembly or sliding axle are undertaken assembly.
7, turning axle load transducer as claimed in claim 1 is characterized in that: described axle load is one of axial force and torque or combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420007415 CN2694245Y (en) | 2004-03-17 | 2004-03-17 | Rotation axis load sensing transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420007415 CN2694245Y (en) | 2004-03-17 | 2004-03-17 | Rotation axis load sensing transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2694245Y true CN2694245Y (en) | 2005-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420007415 Expired - Fee Related CN2694245Y (en) | 2004-03-17 | 2004-03-17 | Rotation axis load sensing transducer |
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| CN (1) | CN2694245Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751835A (en) * | 2011-04-19 | 2012-10-24 | 郑福民 | Brushless DC motor |
| CN102859121A (en) * | 2010-04-20 | 2013-01-02 | 瓦锡兰芬兰有限公司 | Arrangement for detecting axial movement of a shaft |
| CN101395460B (en) * | 2006-03-03 | 2013-02-06 | 芙罗服务管理公司 | Load measurement method and device |
| CN103048077A (en) * | 2012-12-21 | 2013-04-17 | 中国船舶重工集团公司第七一九研究所 | Dynamic stress monitoring device of propeller main shaft |
| CN103401116A (en) * | 2013-08-13 | 2013-11-20 | 苏州科利亚照明科技有限公司 | Conductive rotational connection device |
| CN104271223A (en) * | 2012-05-08 | 2015-01-07 | 巴斯夫欧洲公司 | Method for operating a device comprising at least one rotating shaft |
| CN105784246A (en) * | 2016-03-05 | 2016-07-20 | 太原理工大学 | Rotary shaft axial force measuring device |
| CN108204872A (en) * | 2016-12-19 | 2018-06-26 | 通用电气公司 | For the torque monitoring device of gas-turbine unit |
| CN110108407A (en) * | 2019-04-12 | 2019-08-09 | 奇瑞新能源汽车技术有限公司 | New-energy automobile sleeve nut's axial force detection rack and its detection method |
| CN110967137A (en) * | 2018-09-28 | 2020-04-07 | 通用电气阿维奥有限责任公司 | Torque measuring system |
| CN113720511A (en) * | 2021-08-31 | 2021-11-30 | 浙江清华柔性电子技术研究院 | Shafting cooperation monitoring device |
-
2004
- 2004-03-17 CN CN 200420007415 patent/CN2694245Y/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101395460B (en) * | 2006-03-03 | 2013-02-06 | 芙罗服务管理公司 | Load measurement method and device |
| CN102859121A (en) * | 2010-04-20 | 2013-01-02 | 瓦锡兰芬兰有限公司 | Arrangement for detecting axial movement of a shaft |
| CN102751835A (en) * | 2011-04-19 | 2012-10-24 | 郑福民 | Brushless DC motor |
| CN104271223B (en) * | 2012-05-08 | 2017-02-15 | 巴斯夫欧洲公司 | Method for operating a device comprising at least one rotating shaft |
| CN104271223A (en) * | 2012-05-08 | 2015-01-07 | 巴斯夫欧洲公司 | Method for operating a device comprising at least one rotating shaft |
| CN103048077A (en) * | 2012-12-21 | 2013-04-17 | 中国船舶重工集团公司第七一九研究所 | Dynamic stress monitoring device of propeller main shaft |
| CN103048077B (en) * | 2012-12-21 | 2015-02-04 | 中国船舶重工集团公司第七一九研究所 | Dynamic stress monitoring device of propeller main shaft |
| CN103401116A (en) * | 2013-08-13 | 2013-11-20 | 苏州科利亚照明科技有限公司 | Conductive rotational connection device |
| CN103401116B (en) * | 2013-08-13 | 2015-11-25 | 苏州景阳德五金机械有限公司 | A kind of conductive rotational connection device |
| CN105784246A (en) * | 2016-03-05 | 2016-07-20 | 太原理工大学 | Rotary shaft axial force measuring device |
| CN108204872A (en) * | 2016-12-19 | 2018-06-26 | 通用电气公司 | For the torque monitoring device of gas-turbine unit |
| US10975717B2 (en) | 2016-12-19 | 2021-04-13 | General Electric Company | Torque monitoring device for a gas turbine engine |
| CN110967137A (en) * | 2018-09-28 | 2020-04-07 | 通用电气阿维奥有限责任公司 | Torque measuring system |
| US11493407B2 (en) | 2018-09-28 | 2022-11-08 | Ge Avio S.R.L. | Torque measurement system |
| CN110108407A (en) * | 2019-04-12 | 2019-08-09 | 奇瑞新能源汽车技术有限公司 | New-energy automobile sleeve nut's axial force detection rack and its detection method |
| CN110108407B (en) * | 2019-04-12 | 2021-07-30 | 奇瑞新能源汽车股份有限公司 | Method for detecting axial force of sleeve nut for new energy automobile |
| CN113720511A (en) * | 2021-08-31 | 2021-11-30 | 浙江清华柔性电子技术研究院 | Shafting cooperation monitoring device |
| CN113720511B (en) * | 2021-08-31 | 2023-10-20 | 浙江清华柔性电子技术研究院 | Shafting cooperation monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050420 Termination date: 20120317 |