CN103527643B - With the magnet fluid sealing axle of torque measurement - Google Patents
With the magnet fluid sealing axle of torque measurement Download PDFInfo
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- CN103527643B CN103527643B CN201310429513.XA CN201310429513A CN103527643B CN 103527643 B CN103527643 B CN 103527643B CN 201310429513 A CN201310429513 A CN 201310429513A CN 103527643 B CN103527643 B CN 103527643B
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- air supporting
- supporting cover
- air
- transmission shaft
- cover
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- 238000007789 sealing Methods 0.000 title claims abstract description 21
- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 239000012530 fluid Substances 0.000 title claims abstract description 10
- 230000008093 supporting effect Effects 0.000 claims abstract description 143
- 230000005540 biological transmission Effects 0.000 claims abstract description 40
- 239000011553 magnetic fluid Substances 0.000 claims description 16
- 239000000523 sample Substances 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000007667 floating Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a kind of magnet fluid sealing axle with torque measurement, relate to the testing apparatus under thermal vacuum experiment, it comprises transmission shaft, air supporting cover, nonmagnetic seat, core assembly, core assembly, the first air supporting cover, the second air supporting cover are sleeved on transmission shaft from left to right successively, gap portion transmission shaft being positioned at the first air supporting cover and the second air supporting cover is equipped with supporting base, and described supporting base is equipped with torque measuring device.The present invention is set with two air supporting covers on transmission shaft, stable air film can be formed on transmission shaft, air supporting be formed to transmission shaft and supports, due to air-floating apparatus frictionless advantage, avoid the impact of frictional force on torque measurement of plain bearing, further increase testing precision; First air supporting cover and the second air supporting cover are axially uniformly distributed exhaust port near two annular end faces of supporting base, formed between two air supporting covers and supporting base and stablize air film, the precision of the Relative friction impact measurement preventing from the gentle empty boasting of supporting base from directly contacting causing.
Description
Technical field
The present invention relates to the angle measurement device of a kind of thermal vacuum experiment lower shaft, particularly relate to the magnet fluid sealing axle with torque measurement.
Background technique
Thermal vacuum test refer to regulation vacuum and thermal cycle conditions under check the performance of measured piece and the test of function.Thermal vacuum test not only needs the vacuum-simulating system simulating outer space vacuum environment, and need can drive equipment or load with suffered by simulation mechanism drive and load device, also to possess the ability of the information such as the torque of real-time high-precision measuring equipment, corner and rotating speed simultaneously.
Carrying out measured piece reversing in the thermal vacuum test of loading, due under hot vacuum environment, the reliability decrease of sensor, power equipment, working life shortens, and is difficult to control in test process, therefore often adopts the outer analog system of thermal vacuum and vacuum tank to test outward.The outside referring to and transmitted torque to vacuum tank by seal arrangement tested outward by tank, and the test of torque is carried out outside vacuum tank.
To load outward as tank and measuring device is fixedly tested by the motor output shaft to be measured in transmission shaft and tank, to analyze each characteristic of motor under hot vacuum environment, if also need the no-load characteristic measuring motor, in test process, need motor output shaft and transmission shaft to throw off, this difficulty under hot vacuum environment is very large.If measured piece is coupling etc., two-way shaft and tank is needed to load outward and measuring device is connected.
Thermal vacuum test system often adopts magnetic fluid seal driving device to be connected with measured piece in vacuum tank, rotary magnetic Fluid Sealing axle can meet guarantee hot vacuum environment seal request on the one hand, also can realize on the other hand vacuum tank outer to the transmission of power in tank, if number of patent application is 200710068382.1, " magnetofluid seal driving device for vacuum equipment driving shaft " discloses and a kind ofly adopts that testing precision is high, the magnetic fluid seal driving device of good reliability.Number of patent application is that " device for sealing magnetic fluid " of 201010243123.X also discloses a kind of magnetic sealing means; Because sensor measuring device is positioned at outside thermal vacuum analog system, this has become indirect inspection with regard to making to the measurement of measured piece information in thermal vacuum simulated environment, magnetic fluid seal driving device self friction power consumption is little, but magnet fluid sealing axle both sides need bearings to ensure not deflect, if use bearings, the frictional force of bearing can produce impact greatly to torque measurement; Measured piece is fixedly linked by the loading outside magnetic fluid seal driving device and tank and measuring device, because measured piece can produce distortion under hot vacuum environment, and measured piece is fixed in tank, distortion can affect the connection of measured piece and magnet fluid sealing axle, make it connect axle center to change, produce the result that deflection waits impact test.
Summary of the invention
For the problem such as frictional influence of measured piece deformation and magnetic fluid seal driving device in thermal vacuum torsion test, the invention provides a kind of eliminate frictional force, do not measure axle by the high precision of the band magnetic current sealing under the hot vacuum environment of measured piece deformation effect without friction torque.
The technical solution adopted for the present invention to solve the technical problems is: with the magnet fluid sealing axle of torque measurement, comprise transmission shaft, air supporting cover, nonmagnetic seat, core assembly, described air supporting cover comprises the first air supporting cover and the second air supporting cover, described core assembly, first air supporting cover, second air supporting cover is sleeved on transmission shaft from left to right successively, described core assembly and the first air supporting cover, be spaced a distance between first air supporting cover and the second air supporting cover, described nonmagnetic cover for seat is contained in the first air supporting cover, second air supporting cover, on core assembly, described transmission shaft and the first air supporting cover, micro-gap is had between second air supporting cover, described nonmagnetic seat is provided with two radial air inlet holes, the air-inlet cavity that described radial air inlet hole puts with two air supportings respectively communicates, the external thermal vacuum tank of described nonmagnetic seat left end, nonmagnetic seat and thermal vacuum tank affixed, described nonmagnetic seat right-hand member installs end cap, described nonmagnetic seat is positioned at the gap portion that core assembly and the first air supporting are overlapped and the radially uniform bleeder port of gap portion that the first air supporting is overlapped and the second air supporting is overlapped,
The gap portion described transmission shaft being positioned at the first air supporting cover and the second air supporting cover is equipped with supporting base, described supporting base is equipped with foil gauge and stabilized power supply; Internal partial wall on described nonmagnetic seat between the first air supporting cover and the second air supporting cover is equipped with excitation power supply; Described supporting base is affixed annular coding mask on the side that the first air supporting is overlapped; Described first air supporting cover and supporting base, between the second air supporting cover and supporting base, there is micro-gap; Described first air supporting cover and the second air supporting cover are axially uniformly distributed exhaust port near two annular end faces of supporting base; Described first air supporting cover is provided with a blind hole near the annular end face of supporting base, and be provided with a laser probe in blind hole, laser probe is just to annular coding mask;
Described core assembly comprises two blocks of annular magnetic poles, permanent magnets, and described permanent magnet is between two pieces of annular magnetic poles, and the internal surface of described annular magnetic pole is provided with pole mark of mouth groove, is provided with sealing magnetic fluid between the micro-gap of described pole mark of mouth groove and transmission shaft; Described nonmagnetic seat is provided with magnetic fluid filling aperture;
Be provided with a 〇 RunddichtringO between described nonmagnetic seat and thermal vacuum tank, install between described two pieces of annular magnetic poles and nonmagnetic seat and be provided with the 2nd 〇 RunddichtringO, between described first, second air supporting cover outer ring and nonmagnetic seat, the 3rd 〇 RunddichtringO is installed.
Mentality of designing of the present invention and advantage show: transmission shaft is set with core assembly and plays sealing effect, but core assembly does not play a supportive role; Transmission shaft is set with two air supporting covers, by the radial air inlet hole air feed on nonmagnetic seat, stable air film can be formed on transmission shaft, two air supporting covers are spaced a distance, form air supporting to transmission shaft to support, prevent transmission shaft from occurring bending, due to air-floating apparatus frictionless advantage, avoid the impact of frictional force on torque measurement of plain bearing, further increase testing precision.
Foil gauge and stabilized power supply supporting base be equipped with, internal partial wall on nonmagnetic seat between the first air supporting cover and the second air supporting cover is equipped with excitation power supply, foil gauge, stabilized power supply and excitation power supply and external load equipment constitute torque sensor, foil gauge is powered by the one group of toroidal transformer established on a sensor, induced voltage is provided, converts the VDC of high stability through over commutation, voltage stabilizing to.This voltage had both supplied foil gauge as bridge pressure, also supplied internal circuit as operating voltage.The mV level torque signal of strain measurement is exaggerated into the strong signal of V level, the square signal of direct ratio is being become through V/F transducer, and be transmitted on outside signal receiver, be reduced into the digital signal of the square wave same frequency changed out with V/F by demodulation, its phase difference is not more than 1 delicate negligible.
First air supporting cover and the second air supporting cover are axially uniformly distributed exhaust port near two annular end faces of supporting base, formed between two air supporting covers and supporting base and stablize air film, the precision of the Relative friction impact measurement preventing from the gentle empty boasting of supporting base from directly contacting causing.The air film formed about supporting base can prevent the left and right play of transmission shaft.
Under the environment of thermal vacuum, workpiece easily produces distortion by high temperature, directly in the environment of thermal vacuum, measure the precision that not only can affect measurement, a whole set of measuring device can also be destroyed, therefore measuring tool is placed on outside thermal vacuum layer environment by we, pass through magnet fluid sealing, prevent high temperature on the impact of measuring device, device for sealing magnetic fluid and seal ring is utilized whole thermal vacuum tank to be sealed, transmission shaft is connected by coupling with the output shaft of measured piece in thermal vacuum tank, read the reading on annular coding mask by laser probe, measure the torque of axle.
Accompanying drawing explanation
Fig. 1 is the structural representation measuring axle without friction torque of band magnetic current sealing.
Embodiment
Now by reference to the accompanying drawings the present invention is further detailed.
By reference to the accompanying drawings 1, with the magnet fluid sealing axle of torque measurement, comprise transmission shaft 1, air supporting cover, nonmagnetic seat 2 and core assembly, air supporting cover comprises the first air supporting cover 3 and the second air supporting cover 4, core assembly, first air supporting cover 3, second air supporting cover 4 is sleeved on transmission shaft 1 from left to right successively, core assembly and the first air supporting cover 3, be spaced a distance between first air supporting cover 3 and the second air supporting cover 4, nonmagnetic seat 2 is sleeved on the first air supporting cover 3, second air supporting cover 4, on core assembly, nonmagnetic seat 2 and the first air supporting overlap 3, second air supporting cover 4, rotation is not produced between core assembly.
Transmission shaft 1 and the first air supporting overlap the 3, second air supporting overlap 4 between have micro-gap, after air inlet, the first air supporting cover 3 and transmission shaft 1, second air supporting are overlapped between 4 and transmission shaft 1 and are formed stable air film, be spaced a distance between first air supporting cover 3 and the second air supporting cover 4, transmission shaft 1 is played to the effect of support, core assembly only plays the effect of sealing, can not produce the effect of support.
Nonmagnetic seat 2 is provided with two radial air inlet holes 8, and the air-inlet cavity that radial air inlet hole 8 puts with two air supportings respectively communicates.The external thermal vacuum tank of nonmagnetic seat 2 left end, nonmagnetic seat 2 is affixed by bolt with thermal vacuum tank, and thermal vacuum tank is provided with through hole, and transmission shaft 1 is through the measured piece output shaft on the measured piece by connecting in thermal vacuum tank.Nonmagnetic seat 2 right-hand member installs end cap 11.Nonmagnetic seat 2 be positioned at core assembly and the first air supporting overlap 3 gap portion and the first air supporting overlap 3 and second air supporting overlap 4 the radially uniform bleeder port 7 of gap portion.
Gap portion transmission shaft 1 being positioned at the first air supporting cover 3 and the second air supporting cover 4 is equipped with supporting base 9, supporting base 9 is equipped with foil gauge 12 and stabilized power supply 14; Internal partial wall on nonmagnetic seat 2 between the first air supporting cover 3 and the second air supporting cover 4 is equipped with excitation power supply 13; Supporting base 6 affixed annular coding mask on the side of the first air supporting cover 3; First air supporting cover 3 and supporting base 9, second air supporting are overlapped between 4 and supporting base 9 and are had micro-gap; First air supporting cover 3 and the second air supporting cover 4 are axially uniformly distributed exhaust port near two annular end faces of supporting base 9; First air supporting cover 3 is provided with a blind hole near the annular end face of supporting base 9, and be provided with a laser probe 10 in blind hole, laser probe 10 is just to annular coding mask.
Core assembly comprises two pieces of annular magnetic poles 5, permanent magnet 6, and permanent magnet 6 is between two pieces of annular magnetic poles 5, and the internal surface of two pieces of annular magnetic poles 5 is provided with pole mark of mouth groove, is provided with sealing magnetic fluid between the micro-gap of pole mark of mouth groove and transmission shaft 1; Nonmagnetic seat 2 is provided with magnetic fluid filling aperture.
Be provided with an O RunddichtringO between nonmagnetic seat 2 and thermal vacuum tank, install between annular magnetic pole 5 and nonmagnetic seat 2 and be provided with the 2nd O RunddichtringO, between two air supporting cover outer rings and nonmagnetic seat 2, the 3rd O RunddichtringO is installed.
Outer loading equipemtn is installed on the right side of transmission shaft 1, left side connects the measured piece output shaft in thermal vacuum tank through thermal vacuum tank skin, when installing, first nonmagnetic seat 2 bolt is arranged on thermal vacuum tank skin, loads onto core assembly, the first air supporting cover 3, transmission shaft 1, second air supporting cover 4, end cap 11 successively.The installation of the measured piece in thermal vacuum tank and measured piece output shaft and transmission shaft is carried out at normal temperatures.After whole device is installed, nonmagnetic seat 2 is utilized to be provided with magnetic fluid filling aperture by between the micro-gap of magnetic fluid injector mark of mouth groove and transmission shaft, utilize nonmagnetic seat 2 to be provided with two radial air inlet holes 8 and overlap 4 air feed to the first air supporting cover 3 and the second air supporting, be contained in the outer loading device start on the right side of transmission shaft 1, after whole unit normal run, laser probe 10 reads out the scale on annular coding mask 9, utilize wire by the data importing equipment of laser probe 10, the measurement to angle can be completed.
Claims (1)
1. the magnet fluid sealing axle with torque measurement, it is characterized in that: it comprises transmission shaft, air supporting cover, nonmagnetic seat, core assembly, described air supporting cover comprises the first air supporting cover and the second air supporting cover, described core assembly, first air supporting cover, second air supporting cover is sleeved on transmission shaft from left to right successively, described core assembly and the first air supporting cover, be spaced a distance between first air supporting cover and the second air supporting cover, described nonmagnetic cover for seat is contained in the first air supporting cover, second air supporting cover, on core assembly, described transmission shaft and the first air supporting cover, micro-gap is had between second air supporting cover, described nonmagnetic seat is provided with two radial air inlet holes, the air-inlet cavity that described radial air inlet hole puts with two air supportings respectively communicates, the external thermal vacuum tank of described nonmagnetic seat left end, nonmagnetic seat and thermal vacuum tank affixed, described nonmagnetic seat right-hand member installs end cap, described nonmagnetic seat is positioned at the gap portion that core assembly and the first air supporting are overlapped and the radially uniform bleeder port of gap portion that the first air supporting is overlapped and the second air supporting is overlapped,
The gap portion described transmission shaft being positioned at the first air supporting cover and the second air supporting cover is equipped with supporting base, described supporting base is equipped with foil gauge and stabilized power supply; Internal partial wall on described nonmagnetic seat between the first air supporting cover and the second air supporting cover is equipped with excitation power supply; Described supporting base is affixed annular coding mask on the side that the first air supporting is overlapped; Described first air supporting cover and supporting base, between the second air supporting cover and supporting base, there is micro-gap; Described first air supporting cover and the second air supporting cover are axially uniformly distributed exhaust port near two annular end faces of supporting base; Described first air supporting cover is provided with a blind hole near the annular end face of supporting base, and be provided with a laser probe in blind hole, laser probe is just to annular coding mask;
Described core assembly comprises two blocks of annular magnetic poles, permanent magnets, and described permanent magnet is between two pieces of annular magnetic poles, and the internal surface of described annular magnetic pole is provided with pole mark of mouth groove, is provided with sealing magnetic fluid between the micro-gap of described pole mark of mouth groove and transmission shaft; Described nonmagnetic seat is provided with magnetic fluid filling aperture;
Be provided with a 〇 RunddichtringO between described nonmagnetic seat and thermal vacuum tank, install between described two pieces of annular magnetic poles and nonmagnetic seat and be provided with the 2nd 〇 RunddichtringO, between described first, second air supporting cover outer ring and nonmagnetic seat, the 3rd 〇 RunddichtringO is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429513.XA CN103527643B (en) | 2013-09-18 | 2013-09-18 | With the magnet fluid sealing axle of torque measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429513.XA CN103527643B (en) | 2013-09-18 | 2013-09-18 | With the magnet fluid sealing axle of torque measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103527643A CN103527643A (en) | 2014-01-22 |
| CN103527643B true CN103527643B (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310429513.XA Active CN103527643B (en) | 2013-09-18 | 2013-09-18 | With the magnet fluid sealing axle of torque measurement |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108612756B (en) * | 2018-07-13 | 2019-08-23 | 燕山大学 | A kind of adjustable piezoelectric ceramics sealing oil edge hydrodynamic journal liquid polymers |
| JP7486291B2 (en) * | 2019-07-12 | 2024-05-17 | Ntn株式会社 | Bearing device and spindle device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2447583Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid sealing device for vacuum equipment driving shaft capable of forced cooling |
| CN2447582Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| JP2001311473A (en) * | 2000-04-28 | 2001-11-09 | Rigaku Corp | Shaft sealing apparatus |
| CN101055037A (en) * | 2007-04-29 | 2007-10-17 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN201027988Y (en) * | 2007-04-29 | 2008-02-27 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| KR100906072B1 (en) * | 2008-06-11 | 2009-07-03 | 박광준 | Magnetic fluid sealing member and vacuum sealing device including the same |
| CN203560305U (en) * | 2013-09-18 | 2014-04-23 | 浙江工业大学 | Magnetic fluid sealing shaft with torque measurer |
-
2013
- 2013-09-18 CN CN201310429513.XA patent/CN103527643B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001311473A (en) * | 2000-04-28 | 2001-11-09 | Rigaku Corp | Shaft sealing apparatus |
| CN2447583Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid sealing device for vacuum equipment driving shaft capable of forced cooling |
| CN2447582Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN101055037A (en) * | 2007-04-29 | 2007-10-17 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN201027988Y (en) * | 2007-04-29 | 2008-02-27 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| KR100906072B1 (en) * | 2008-06-11 | 2009-07-03 | 박광준 | Magnetic fluid sealing member and vacuum sealing device including the same |
| CN203560305U (en) * | 2013-09-18 | 2014-04-23 | 浙江工业大学 | Magnetic fluid sealing shaft with torque measurer |
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| CN103527643A (en) | 2014-01-22 |
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Effective date of registration: 20191210 Address after: 313000 No.5-8, Changhe Road, Huaxi street, Changxing County, Huzhou City, Zhejiang Province Patentee after: Zhejiang Changxing green battery technology Co.,Ltd. Address before: 313000 Room 1403, 14th Floor, Building B, Freeport, Headquarters 1188 District Fulu Road, Wuxing District, Huzhou City, Zhejiang Province Patentee before: Zhejiang creation Intellectual Property Service Co.,Ltd. Effective date of registration: 20191210 Address after: 313000 Room 1403, 14th Floor, Building B, Freeport, Headquarters 1188 District Fulu Road, Wuxing District, Huzhou City, Zhejiang Province Patentee after: Zhejiang creation Intellectual Property Service Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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Effective date of registration: 20201110 Address after: 221000 north side of Pei highway and east side of Hanrun Road (room 2013, building 6, science and technology entrepreneurship Park), Peixian Economic Development Zone, Xuzhou City, Jiangsu Province Patentee after: Peixian Duchuang Technology Development Co.,Ltd. Address before: 313000 No.5-8, Changhe Road, Huaxi street, Changxing County, Huzhou City, Zhejiang Province Patentee before: Zhejiang Changxing green battery technology Co.,Ltd. |
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Effective date of registration: 20231205 Address after: Room 1404, Building 1, Green Lijing Community, No. 6419 Fanhua Avenue, Baohe District, Hefei City, Anhui Province, 230000 Patentee after: Hefei Hongfujin Auto Parts Co.,Ltd. Address before: 221000 north side of Pei highway and east side of Hanrun Road (room 2013, building 6, science and technology entrepreneurship Park), Peixian Economic Development Zone, Xuzhou City, Jiangsu Province Patentee before: Peixian Duchuang Technology Development Co.,Ltd. |
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