CN103486981A - High-precision angle testing device in thermal vacuum environment - Google Patents
High-precision angle testing device in thermal vacuum environment Download PDFInfo
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- CN103486981A CN103486981A CN201310430392.0A CN201310430392A CN103486981A CN 103486981 A CN103486981 A CN 103486981A CN 201310430392 A CN201310430392 A CN 201310430392A CN 103486981 A CN103486981 A CN 103486981A
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- air supporting
- supporting cover
- transmission shaft
- measured piece
- core assembly
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Abstract
The invention discloses a high-precision angle testing device in a thermal vacuum environment, and relates to the field of sealing testing devices in a thermal vacuum experiment. The device comprises a transmission shaft, floatation sleeves, a nonmagnetic base, a magnetic core assembly, a thermal vacuum tank and a to-be-tested element. The magnetic core assembly is arranged on the transmission shaft in a sleeved mode to perform a sealing function, the two floatation sleeves are arranged on the transmission shaft in a sleeved mode to support the transmission shaft in a floatation mode, and due to the advantage that a floatation device has no friction, influences of friction of bearings on torque measurement are avoided and test precision is further improved. A heat sink arranged in the thermal vacuum tank divides the thermal vacuum tank into a thermal vacuum layer and a near-room-temperature vacuum layer, and because a workpiece is prone to being deformed in a high-temperature environment, an angle measuring device is arranged on the near-room-temperature vacuum layer. Meanwhile, a poking rod is connected with an output shaft of the to-be-tested element and the transmission shaft, influences of axis deviation caused by deformation of the workpiece in the high-temperature environment on transmission are eliminated, the torque of the workpiece is measured on the transmission shaft, and the angle is measured by means of a flange plate arranged on the output shaft of the to-be-tested element.
Description
Technical field
The present invention relates to the sealing test device under a kind of thermovacuum experiment, relate in particular to the high precision angle measurement device under a kind of hot vacuum environment.
Background technology
Thermal vacuum test refers to the performance of check measured piece under the vacuum of regulation and thermal cycle conditions and the test of function.Thermal vacuum test not only needs that the vacuum-simulating system that can simulate outer space vacuum environment is arranged, and need to have and can be driven or load with the suffered driving of simulation mechanism and load device equipment, 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 loaded, under hot vacuum environment, the reliability decrease of sensor, power-equipment, shorten serviceable life, in test process, is difficult to control, and therefore often adopting the outer simulation system of thermovacuum is that vacuum tank is tested outward.The outer test of tank refers to arrives transmission of torque by packoff the outside of vacuum tank, and the test of torque is carried out outside vacuum tank.
Loading as outer as tank and measurement mechanism 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 are thrown off, this difficulty under hot vacuum environment is very large.If measured piece is shaft coupling etc., need the outer loading of two-way shaft and tank and measurement mechanism to be connected.
The thermal vacuum test system often adopts the 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 that on the other hand vacuum tank is outer to the transmission of power in tank, as number of patent application is 200710068382.1, " magnetofluid seal driving device for vacuum equipment driving shaft " discloses and a kind ofly adopts that accuracy of detection 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 the sensor measurement mechanism is positioned at outside the thermovacuum simulation system, this just makes the measurement to measured piece information in the thermovacuum simulated environment become indirect measurement, 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 the use bearings, the friction force of bearing can produce impact greatly to torque measurement; Measured piece is fixedly linked by loading and the measurement mechanism outside magnetic fluid seal driving device and tank, 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 the thermovacuum torsion test and magnetic fluid seal driving device, the invention provides a kind of high precision angle measurement device of eliminating under hot vacuum environment friction force, that be not subject to the measured piece deformation effect.
The technical solution adopted for the present invention to solve the technical problems is: the high precision angle measurement device under a kind of hot vacuum environment, comprise thermovacuum tank and measured piece, and in described thermovacuum tank, be provided with heat sinkly, measured piece connects the measured piece output shaft, it also 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 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, minim gap is arranged, described nonmagnetic seat is provided with two radial air inlet holes, described radial air inlet hole communicates with the inlet chamber that two air supportings put respectively, described nonmagnetic seat left end and thermovacuum tank are fixed, 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, described transmission shaft is through the thermovacuum tank, the left end of described transmission shaft is connected by deflector rod device with the measured piece input shaft, the measured piece output shaft is through heat sink, the outer loading equipment of the external thermovacuum tank of described transmission shaft right-hand member and torque sensor,
One end of described measured piece output shaft is through heat sink connection measured piece, the part that the measured piece output shaft is positioned at heat sink right side is provided with ring flange, annular code-wheel is equipped with in the outside of method wheel disc, and the laser acquisition head is housed on the thermovacuum tank, and the laser acquisition head is for reading the angle of annular code-wheel;
Described deflector rod device comprises driving lever, spring, pulley, square boss, described square boss is fixed on the end face of measured piece output shaft, and described driving lever is provided with four, one end connection of rotating axle of driving lever, four driving levers distribute symmetrically at the rotation axis end face, and the other end of four driving levers all connects four pulleys by spring, and four pulleys lean against the two sides of square boss;
Described core assembly comprises two annular magnetic poles, permanent magnet, and described permanent magnet is between two annular magnetic poles, and the inside surface of described annular magnetic pole is provided with utmost point mark of mouth groove, is provided with the sealing magnetic fluid between the minim gap of described utmost point mark of mouth groove and transmission shaft; Described nonmagnetic seat is provided with the filling hole of magnetic fluid;
Be provided with a 〇 RunddichtringO between described nonmagnetic seat and thermovacuum tank, between described two annular magnetic poles and nonmagnetic seat, be equipped 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, the suit core assembly plays sealing effectiveness, but core assembly does not play a supportive role; Two air supporting covers of suit on transmission shaft, 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 friction free advantage, avoid the impact of the friction force of plain bearing on torque measurement, further improved measuring accuracy.
What in the thermovacuum tank, be provided with heat sinkly is divided into thermovacuum layer and near ambient temperature vacuum layer by the thermovacuum tank, and under hot environment, workpiece is subject to high temperature easily to produce distortion, so we are located at the near ambient temperature layer by angle measurement unit; Simultaneously, by driving lever, connect measured piece output shaft and transmission shaft, eliminate workpiece and at high temperature be out of shape the impact of the desaxe of generation on transmission, the moment of torsion of measuring workpieces on transmission shaft, utilize the ring flange of installing on the measured piece output shaft to take measurement of an angle.
The accompanying drawing explanation
Fig. 1 is the structural representation of the high precision angle measurement device under hot vacuum environment.
Fig. 2 is the enlarged drawing of deflector rod device sectional view.
Embodiment
Now by reference to the accompanying drawings the present invention is further detailed.
By reference to the accompanying drawings 1, accompanying drawing 2, high precision angle measurement device under a kind of hot vacuum environment, comprise thermovacuum tank 2 and measured piece 6, be provided with heat sink 8 in thermovacuum tank 2, measured piece 6 connects measured piece output shaft 5, this device also comprises transmission shaft 1, the air supporting cover, nonmagnetic seat 14, core assembly, the 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 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 14 is sleeved on the first air supporting cover 3, the second air supporting cover 4, on core assembly, transmission shaft 1 and the first air supporting cover 3, between the second air supporting cover 4, minim gap is arranged, nonmagnetic seat is provided with two radial air inlet holes 13, radial air inlet hole 13 communicates with the inlet chamber that two air supportings put respectively, nonmagnetic seat 14 left ends and thermovacuum tank 2 are fixing, nonmagnetic seat 14 right-hand members are installed end cap 17, nonmagnetic seat 14 is positioned at the gap portion of core assembly and the first air supporting cover 3 and the radially uniform bleeder port 12 of gap portion of the first air supporting cover the 3 and second air supporting cover 4, transmission shaft 1 is through thermovacuum tank 2, the left end of transmission shaft 1 is connected by deflector rod device with measured piece input shaft 5, measured piece output shaft 5 is through heat sink 8, the transmission shaft outer loading equipment of the external thermovacuum tank of 1 right-hand member and torque sensor.
Measured piece 6 is fixing with thermovacuum tank 2 by base 7.
One end of measured piece output shaft 5 connects measured piece 6 through heat sink 8, the part that measured piece output shaft 5 is positioned at heat sink 8 right sides is provided with ring flange 9, annular code-wheel 22 is equipped with in wheel of the law dish 9 outsides, laser acquisition 16 is housed on the thermovacuum tank, and laser acquisition 16 is for reading the angle of annular code-wheel 22.
Deflector rod device comprises driving lever 19, spring 20, pulley 21, square boss 18, square boss 18 is fixed on the end face of measured piece output shaft 5, and driving lever 19 is provided with four, one end connection for transmission axle 1 of driving lever 19, four driving levers 19 distribute symmetrically at transmission shaft 1 end face, and the other end of four driving levers 19 all connects by spring 20 two sides that 21, four pulleys 21 of four pulleys lean against square boss 18.Connect measured piece output shaft 5 and transmission shaft 1 by deflector rod device, eliminating workpiece deformation is that desaxe brings the impact on measuring.
Core assembly comprises two annular magnetic poles 10, permanent magnet 11, and permanent magnet 11 is between two annular magnetic poles 10, and the inside surface of annular magnetic pole 10 is provided with utmost point mark of mouth groove 15, is provided with the sealing magnetic fluid between the minim gap of utmost point mark of mouth groove 15 and transmission shaft 1; Nonmagnetic seat 14 is provided with the filling hole of magnetic fluid.
Claims (1)
1. the high precision angle measurement device under a hot vacuum environment, comprise thermovacuum tank and measured piece, in described thermovacuum tank, is provided with heat sinkly, and measured piece connects the measured piece output shaft, it is characterized in that: it also 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 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, minim gap is arranged, described nonmagnetic seat is provided with two radial air inlet holes, described radial air inlet hole communicates with the inlet chamber that two air supportings put respectively, described nonmagnetic seat left end and thermovacuum tank are fixed, 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, described transmission shaft is through the thermovacuum tank, the left end of described transmission shaft is connected by deflector rod device with the measured piece input shaft, the measured piece output shaft is through heat sink, the outer loading equipment of the external thermovacuum tank of described transmission shaft right-hand member and torque sensor,
One end of described measured piece output shaft is through heat sink connection measured piece, the part that the measured piece output shaft is positioned at heat sink right side is provided with ring flange, annular code-wheel is equipped with in the outside of method wheel disc, and the laser acquisition head is housed on the thermovacuum tank, and the laser acquisition head is for reading the angle of annular code-wheel;
Described deflector rod device comprises driving lever, spring, pulley, square boss, described square boss is fixed on the end face of measured piece output shaft, and described driving lever is provided with four, one end connection of rotating axle of driving lever, four driving levers distribute symmetrically at the rotation axis end face, and the other end of four driving levers all connects four pulleys by spring, and four pulleys lean against the two sides of square boss;
Described core assembly comprises two annular magnetic poles, permanent magnet, and described permanent magnet is between two annular magnetic poles, and the inside surface of described annular magnetic pole is provided with utmost point mark of mouth groove, is provided with the sealing magnetic fluid between the minim gap of described utmost point mark of mouth groove and transmission shaft; Described nonmagnetic seat is provided with the filling hole of magnetic fluid;
Be provided with a 〇 RunddichtringO between described nonmagnetic seat and thermovacuum tank, between described two annular magnetic poles and nonmagnetic seat, be equipped 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 |
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| CN201310430392.0A CN103486981B (en) | 2013-09-18 | 2013-09-18 | High-precision angle proving installation under a kind of hot vacuum environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310430392.0A CN103486981B (en) | 2013-09-18 | 2013-09-18 | High-precision angle proving installation under a kind of hot vacuum environment |
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| CN103486981A true CN103486981A (en) | 2014-01-01 |
| CN103486981B CN103486981B (en) | 2016-04-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567746A (en) * | 2015-01-20 | 2015-04-29 | 武汉工程大学 | High-temperature flange deflection angle testing system |
| CN110082141A (en) * | 2019-05-21 | 2019-08-02 | 浙江工业大学 | Thermal vacuum test facility equipped with heat-insulated magnet fluid sealing axis |
| CN110261145A (en) * | 2019-05-21 | 2019-09-20 | 浙江工业大学 | Thermal vacuum test mechanical arm type dynamic assisted heating device |
Citations (6)
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| JPS55126805A (en) * | 1979-03-23 | 1980-10-01 | Fuji Electric Co Ltd | Measuring instrument for turning angle of rotary axis |
| CN1632452A (en) * | 2004-12-23 | 2005-06-29 | 西安华腾光电有限责任公司 | High precision photoelectric measuring method and measuring apparatus for three-dimensional dip |
| CN1786659A (en) * | 2005-12-28 | 2006-06-14 | 北京交通大学 | Method and apparatus for enhancing measuring sensitivity of rotating corner |
| JP2007198810A (en) * | 2006-01-24 | 2007-08-09 | Fuji Xerox Co Ltd | Position/direction measuring system |
| CN101055037A (en) * | 2007-04-29 | 2007-10-17 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN203561340U (en) * | 2013-09-18 | 2014-04-23 | 浙江工业大学 | A high-precision angle testing device in a thermal vacuum environment |
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2013
- 2013-09-18 CN CN201310430392.0A patent/CN103486981B/en active Active
Patent Citations (6)
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| JPS55126805A (en) * | 1979-03-23 | 1980-10-01 | Fuji Electric Co Ltd | Measuring instrument for turning angle of rotary axis |
| CN1632452A (en) * | 2004-12-23 | 2005-06-29 | 西安华腾光电有限责任公司 | High precision photoelectric measuring method and measuring apparatus for three-dimensional dip |
| CN1786659A (en) * | 2005-12-28 | 2006-06-14 | 北京交通大学 | Method and apparatus for enhancing measuring sensitivity of rotating corner |
| JP2007198810A (en) * | 2006-01-24 | 2007-08-09 | Fuji Xerox Co Ltd | Position/direction measuring system |
| CN101055037A (en) * | 2007-04-29 | 2007-10-17 | 浙江工业大学 | Magnetofluid seal driving device for vacuum equipment driving shaft |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567746A (en) * | 2015-01-20 | 2015-04-29 | 武汉工程大学 | High-temperature flange deflection angle testing system |
| CN104567746B (en) * | 2015-01-20 | 2017-07-11 | 武汉工程大学 | A kind of high-temperature flange deflection angle test system |
| CN110082141A (en) * | 2019-05-21 | 2019-08-02 | 浙江工业大学 | Thermal vacuum test facility equipped with heat-insulated magnet fluid sealing axis |
| CN110261145A (en) * | 2019-05-21 | 2019-09-20 | 浙江工业大学 | Thermal vacuum test mechanical arm type dynamic assisted heating device |
| CN110082141B (en) * | 2019-05-21 | 2024-05-14 | 浙江工业大学 | Thermal vacuum test device with heat-insulating magnetic fluid sealing shaft |
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| CN103486981B (en) | 2016-04-13 |
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