CN103527643A - Magnetic fluid sealing shaft with torque measurement - Google Patents
Magnetic fluid sealing shaft with torque measurement Download PDFInfo
- Publication number
- CN103527643A CN103527643A CN201310429513.XA CN201310429513A CN103527643A CN 103527643 A CN103527643 A CN 103527643A CN 201310429513 A CN201310429513 A CN 201310429513A CN 103527643 A CN103527643 A CN 103527643A
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- Prior art keywords
- air supporting
- supporting cover
- air
- transmission shaft
- cover
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- 238000007789 sealing Methods 0.000 title claims abstract description 22
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 40
- 230000008093 supporting effect Effects 0.000 claims description 128
- 239000000523 sample Substances 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 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
- 238000002474 experimental method Methods 0.000 abstract description 2
- 239000008358 core component Substances 0.000 abstract 2
- 238000009827 uniform distribution Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 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
- 230000008859 change Effects 0.000 description 1
- 238000009863 impact test 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
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Abstract
The invention discloses a magnetic fluid sealing shaft with torque measurement, and relates to test devices in hot vacuum experiments. The magnetic fluid sealing shaft comprises a transmission shaft, a plurality of floating bushes, a non-magnetic base and a plurality of magnetic core components, wherein the magnetic core components, a first floating bush and a second floating bush are sleeved on the transmission shaft from left to right in sequence; the clearance part, which is between the first floating bush and the second floating bush and on the transmission shaft, is provided with the support base; the support base is provided with a torque measurement device. The two floating bushes are sleeved on the transmission shaft, stable gas films can be formed on the transmission shaft to form floating support for the transmission shaft; the floating device is friction-free, so that the impact on torque measurement caused by frictions of ordinary bearings is avoided and the test precision is further improved; a plurality of gas vents are formed axially in uniform distribution in two annular end faces of the first floating bush and the second bush near the support base, the stable gas films are formed between the floating bushes and the support base and the impact on measurement precision caused by relative friction due to the direct contact between the support base and the floating bushes and is prevented.
Description
Technical field
The angle measurement device that the present invention relates to a kind of thermal vacuum experiment lower shaft, relates in particular to the magnet fluid sealing axle with torque measurement.
Background technique
Thermal vacuum test refers to the test of checking performance and the function of measured piece under the vacuum of regulation and thermal cycle conditions.Thermal vacuum test not only needs there is the vacuum-simulating system that can simulate outer space vacuum environment, and need to have and can equipment be driven or be loaded with the suffered driving of simulation mechanism and load device, also to possess the ability of the information such as torque, corner and rotating speed of real-time high-precision measuring equipment simultaneously.
In measured piece being reversed to the thermal vacuum test loading, under hot vacuum environment, the reliability decrease of sensor, power equipment, shorten working life, is difficult to control in test process, and therefore often adopting the outer analog system of thermal vacuum is that vacuum tank is tested outward.The outer test of tank refers to the outside that transmits torque to vacuum tank by seal arrangement, and the test of torque is carried out outward at vacuum tank.
Loading as outer in tank and measuring device are 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 to measure the no-load characteristic of 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., need the outer loading of two-way shaft and tank and measuring device to be 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 assurance 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 be 201010243123.X's " device for sealing magnetic fluid " a kind of magnetic sealing means is also disclosed; Because sensor measuring device is positioned at outside thermal vacuum analog system, this has become indirect measurement 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 guarantee 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 being connected of measured piece and magnet fluid sealing axle, make it connect axle center and change, produce the result of the impact tests such as deflection.
Summary of the invention
For the problems such as frictional influence of measured piece deformation in thermal vacuum torsion test and magnetic fluid seal driving device, the invention provides a kind of high precision with magnetic current sealing of eliminating under hot vacuum environment frictional force, that be not subject to measured piece deformation effect and measure axle 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, the first air supporting cover, the second air supporting cover is sleeved on transmission shaft from left to right successively, described core assembly and the first air supporting cover, the certain distance in interval between the first air supporting cover and the second air supporting cover, described nonmagnetic cover for seat is contained in the first air supporting cover, the second air supporting cover, on core assembly, described transmission shaft and the first air supporting cover, between the second air supporting cover, there is micro-gap, described nonmagnetic seat is provided with two radial air inlet holes, described radial air inlet hole is logical with the air-inlet cavity that two air supportings put respectively, the external thermal vacuum tank of described nonmagnetic seat left end, nonmagnetic seat is affixed with thermal vacuum tank, described nonmagnetic seat right-hand member is installed end cap, described nonmagnetic seat is positioned at the gap portion of core assembly and the first air supporting cover and the radially uniform bleeder port of gap portion of the first air supporting cover and the second air supporting cover,
The gap portion that is positioned at the first air supporting cover and the second air supporting cover on described transmission shaft is equipped with supporting base, and foil gauge and stabilized power supply are housed on described supporting base; On the upper part inwall between the first air supporting cover and the second air supporting cover of described nonmagnetic seat, excitation power supply is housed; Described supporting base is near affixed annular coding mask on the side of the first air supporting cover; Between described the first air supporting cover and supporting base, the second air supporting cover and supporting base, there is micro-gap; Two annular end faces of described the first air supporting cover and the close supporting base of the second air supporting cover are along being axially uniformly distributed exhaust port; Described the first air supporting cover is provided with a blind hole near the annular end face of supporting base, is provided with a laser probe in blind hole, and laser probe is over against annular coding mask;
Described core assembly comprises two annular magnetic poles, permanent magnet, and described permanent magnet is between two annular magnetic poles, and the internal surface of described annular magnetic pole is provided with utmost point mark of mouth groove, between the micro-gap of described utmost point mark of mouth groove and transmission shaft, is provided with sealing magnetic fluid; Described nonmagnetic seat is provided with the filling hole of magnetic fluid;
Between described nonmagnetic seat and thermal vacuum tank, be provided with a 〇 RunddichtringO, between described two annular magnetic poles and nonmagnetic seat, be provided with and establish 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: on transmission shaft, be set with core assembly and play sealing effect, but core assembly does not play a supportive role; On transmission shaft, be set with two air supporting covers, by the radial air inlet hole air feed on nonmagnetic seat, can on transmission shaft, form stable air film, two certain distances in air supporting cover interval, transmission shaft is formed to air supporting and support, prevent that transmission shaft from occurring crooked, due to air-floating apparatus frictionless advantage, avoid the impact of the frictional force of plain bearing on torque measurement, further improved testing precision.
Foil gauge and stabilized power supply are housed on supporting base, on the upper part inwall between the first air supporting cover and the second air supporting cover of nonmagnetic seat, excitation power supply is housed, foil gauge, stabilized power supply and excitation power supply and external load equipment have formed torque sensor, foil gauge power supply is by the one group of toroidal transformer being located on sensor, induced voltage is provided, through over commutation, voltage stabilizing, converts the VDC of high stability to.This voltage had both been supplied with foil gauge and had been pressed as bridge, also supplied with internal circuit as operating voltage.The mV level torque signal of strain measurement is exaggerated into the strong signal of V level, through V/F transducer, becoming the square signal of direct ratio, and be transmitted on outside signal receiver, in the digital signal that is reduced into the square wave same frequency of changing out with V/F by demodulation, it is 1 delicate negligible that its phase difference is not more than.
Two annular end faces of the first air supporting cover and the close supporting base of the second air supporting cover are along being axially uniformly distributed exhaust port, between two air supporting covers and supporting base, form and stablize air film, prevent the precision that the relative frictional influence that directly contact causes of the gentle empty boasting of supporting base is measured.The air film that supporting base left and right forms can prevent the left and right play of transmission shaft.
Under the environment of thermal vacuum, workpiece is subject to high temperature easily to produce distortion, directly in the environment of thermal vacuum, measure and not only can affect the precision of measurement, can also destroy a whole set of measuring device, therefore we are placed on measuring tool outside thermal vacuum layer environment, pass through magnet fluid sealing, prevent the impact of high temperature on measuring device, utilize device for sealing magnetic fluid and seal ring that whole thermal vacuum tank is sealed, transmission shaft is connected by coupling with the output shaft of measured piece in thermal vacuum tank, by laser probe, read the reading on annular coding mask, measure the torque of axle.
Accompanying drawing explanation
Fig. 1 is the structural representation without friction torque measurement axle with magnetic current sealing.
Embodiment
Now by reference to the accompanying drawings the present invention is further detailed.
By reference to the accompanying drawings 1, magnet fluid sealing axle with torque measurement, comprise transmission shaft 1, air supporting cover, nonmagnetic seat 2 and core assembly, air supporting cover comprises first air supporting cover the 3 and second air supporting cover 4, core assembly, the first air supporting cover 3, the 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, the certain distance in interval between first air supporting cover the 3 and second air supporting cover 4, nonmagnetic seat 2 is sleeved on the first air supporting cover 3, the second air supporting cover 4, on core assembly, nonmagnetic seat the 2 and first air supporting cover 3, the second air supporting cover 4, between core assembly, do not rotate.
Between transmission shaft 1 and the first air supporting cover the 3, second air supporting cover 4, there is micro-gap, after air inlet, between the first air supporting cover 3 and transmission shaft 1, the second air supporting cover 4 and transmission shaft 1, form stable air film, the certain distance in interval between first air supporting cover the 3 and 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.
The gap portion that is positioned at first air supporting cover the 3 and second air supporting cover 4 on transmission shaft 1 is equipped with supporting base 9, and foil gauge 12 and stabilized power supply 14 are housed on supporting base 9; On nonmagnetic seat 2, on the part inwall between first air supporting cover the 3 and second air supporting cover 4, excitation power supply 13 is housed; Supporting base 6 is near affixed annular coding mask on the side of the first air supporting cover 3; Between the first air supporting cover 3 and supporting base 9, the second air supporting cover 4 and supporting base 9, there is micro-gap; First air supporting cover 3 and second air supporting cover 4 two annular end faces near supporting base 9 are along being axially uniformly distributed exhaust port; The first air supporting cover 3 annular end faces near supporting base 9 are provided with a blind hole, are provided with a laser probe 10 in blind hole, and laser probe 10 is over against annular coding mask.
Core assembly comprises two annular magnetic poles 5, permanent magnet 6, and permanent magnet 6 is between two annular magnetic poles 5, and the internal surface of two annular magnetic poles 5 is provided with utmost point mark of mouth groove, between the micro-gap of utmost point mark of mouth groove and transmission shaft 1, is provided with sealing magnetic fluid; Nonmagnetic seat 2 is provided with the filling hole of magnetic fluid.
Between nonmagnetic seat 2 and thermal vacuum tank, be provided with an O RunddichtringO, between annular magnetic pole 5 and nonmagnetic seat 2, be provided with and establish 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 use bolts are arranged on thermal vacuum tank skin, load onto successively core assembly, the first air supporting cover 3, transmission shaft 1, the second air supporting cover 4, end cap 11.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, utilize nonmagnetic seat 2 to be provided with the filling hole of magnetic fluid 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 first air supporting cover the 3 and second air supporting, be contained in the outer loading device start on transmission shaft 1 right side, 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, can complete the measurement to angle.
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, the first air supporting cover, the second air supporting cover is sleeved on transmission shaft from left to right successively, described core assembly and the first air supporting cover, the certain distance in interval between the first air supporting cover and the second air supporting cover, described nonmagnetic cover for seat is contained in the first air supporting cover, the second air supporting cover, on core assembly, described transmission shaft and the first air supporting cover, between the second air supporting cover, there is micro-gap, described nonmagnetic seat is provided with two radial air inlet holes, described radial air inlet hole is logical with the air-inlet cavity that two air supportings put respectively, the external thermal vacuum tank of described nonmagnetic seat left end, nonmagnetic seat is affixed with thermal vacuum tank, described nonmagnetic seat right-hand member is installed end cap, described nonmagnetic seat is positioned at the gap portion of core assembly and the first air supporting cover and the radially uniform bleeder port of gap portion of the first air supporting cover and the second air supporting cover,
The gap portion that is positioned at the first air supporting cover and the second air supporting cover on described transmission shaft is equipped with supporting base, and foil gauge and stabilized power supply are housed on described supporting base; On the upper part inwall between the first air supporting cover and the second air supporting cover of described nonmagnetic seat, excitation power supply is housed; Described supporting base is near affixed annular coding mask on the side of the first air supporting cover; Between described the first air supporting cover and supporting base, the second air supporting cover and supporting base, there is micro-gap; Two annular end faces of described the first air supporting cover and the close supporting base of the second air supporting cover are along being axially uniformly distributed exhaust port; Described the first air supporting cover is provided with a blind hole near the annular end face of supporting base, is provided with a laser probe in blind hole, and laser probe is over against annular coding mask;
Described core assembly comprises two annular magnetic poles, permanent magnet, and described permanent magnet is between two annular magnetic poles, and the internal surface of described annular magnetic pole is provided with utmost point mark of mouth groove, between the micro-gap of described utmost point mark of mouth groove and transmission shaft, is provided with sealing magnetic fluid; Described nonmagnetic seat is provided with the filling hole of magnetic fluid;
Between described nonmagnetic seat and thermal vacuum tank, be provided with a 〇 RunddichtringO, between described two annular magnetic poles and nonmagnetic seat, be provided with and establish 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 true CN103527643A (en) | 2014-01-22 |
| CN103527643B CN103527643B (en) | 2016-01-27 |
Family
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Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN103527643B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612756A (en) * | 2018-07-13 | 2018-10-02 | 燕山大学 | A kind of adjustable piezoelectric ceramics sealing oil edge hydrodynamic journal liquid polymers |
| CN114207305A (en) * | 2019-07-12 | 2022-03-18 | Ntn株式会社 | Bearing device and spindle device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2447582Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN2447583Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid sealing device for vacuum equipment driving shaft capable of forced cooling |
| 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 |
| CN2447582Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN2447583Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid sealing device for vacuum equipment driving shaft capable of forced cooling |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612756A (en) * | 2018-07-13 | 2018-10-02 | 燕山大学 | A kind of adjustable piezoelectric ceramics sealing oil edge hydrodynamic journal liquid polymers |
| 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 |
| CN114207305A (en) * | 2019-07-12 | 2022-03-18 | Ntn株式会社 | Bearing device and spindle device |
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| Publication number | Publication date |
|---|---|
| CN103527643B (en) | 2016-01-27 |
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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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