CN106950062B - Test experiment table for anti-drop performance of magnetic suspension bearing - Google Patents
Test experiment table for anti-drop performance of magnetic suspension bearing Download PDFInfo
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- CN106950062B CN106950062B CN201710225374.7A CN201710225374A CN106950062B CN 106950062 B CN106950062 B CN 106950062B CN 201710225374 A CN201710225374 A CN 201710225374A CN 106950062 B CN106950062 B CN 106950062B
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- housing
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- 239000000725 suspension Substances 0.000 title claims abstract description 57
- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 238000002474 experimental method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 238000007789 sealing Methods 0.000 claims description 29
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 20
- 238000005339 levitation Methods 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
Abstract
The invention discloses a test experiment table for the anti-falling performance of a magnetic suspension bearing, which comprises the following components: a housing; the radial bearing stator, the axial bearing stator, the motor stator and the two protection bearings are all arranged in the shell, and the two protection bearings are all arranged outside the shell and are respectively positioned at the left end and the right end of the shell; the magnetic suspension shafting is arranged in the shell, and the left end and the right end of the magnetic suspension shafting respectively extend out of the shell; the two contact force measuring platforms are arranged outside the shell and are respectively positioned at the left end and the right end of the shell, the protection bearing is arranged on the contact force measuring platforms, and each contact force measuring platform comprises four piezoelectric sensors. The test experiment table for the anti-falling performance of the magnetic suspension bearing is suitable for evaluating the reliability and the service life of the protection bearing, researching the anti-falling performance of the protection bearing and has higher measurement precision.
Description
Technical Field
The invention relates to the technical field of magnetic suspension bearings, in particular to a test experiment table for the anti-falling performance of a magnetic suspension bearing.
Background
The magnetic suspension bearing utilizes electromagnetic force to enable the shafting and the bearing to relatively float and rotate, has the advantages of no friction resistance, high operation precision, adjustable rigidity and damping and the like, and is particularly suitable for being used in occasions with high rotating speed, low loss and low noise. A protection bearing (e.g., a rolling bearing) is an auxiliary support structure of a magnetic suspension bearing, and one of its main functions is to temporarily support a high-speed rotating shaft system to re-suspend or safely slow down when the magnetic suspension bearing fails (e.g., a magnetic suspension shaft system falls).
When the magnetic suspension shafting rotating at high speed falls, the shafting and the inner ring of the protection bearing are collided and rubbed vigorously. Because of the small gap between the shafting and the inner ring of the protection bearing, the track response of the shafting in the falling process is very complex, including pendulum vibration, mixed friction, bouncing and full-circle friction. The contact force between the shafting and the protection bearing has the characteristics of high amplitude and high frequency, and huge vibration and impact are likely to cause the failure of the protection bearing and even cause the serious burnout of the magnetic suspension bearing and the rotor.
At present, the test of the anti-falling performance of the protection bearing also lacks effective technical means, so that a lot of work is not completed for predicting the service life of the protection bearing. The bench test is an important means for researching the anti-falling performance of the magnetic suspension bearing, namely, the high-speed falling test of the magnetic suspension shafting is carried out by simulating the actual working condition of the operation of the magnetic suspension bearing, however, the influence of different parameters on the axis track and vibration is usually researched only by using the bench test, and the life evaluation and anti-falling performance research of the protection bearing are not related.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a test experiment table for the anti-falling performance of the magnetic suspension bearing, which is suitable for evaluating the reliability and the service life of the protection bearing, researching the anti-falling performance of the protection bearing and has higher measurement precision.
According to the embodiment of the invention, the test experiment table for the anti-falling performance of the magnetic suspension bearing comprises the following components: a housing; the radial bearing stator, the axial bearing stator and the motor stator are all arranged in the shell, and the two protection bearings are all arranged outside the shell and are respectively positioned at the left end and the right end of the shell; the magnetic suspension shafting is arranged in the shell, the left end and the right end of the magnetic suspension shafting extend out of the shell respectively, and the magnetic suspension shafting passes through the radial bearing stator, the axial bearing stator, the motor stator and the protection bearing respectively; the two contact force measuring platforms are arranged outside the shell and are respectively positioned at the left end and the right end of the shell, the protection bearing is arranged on the contact force measuring platforms, and each contact force measuring platform comprises four piezoelectric sensors for measuring the contact force between the protection bearing and the magnetic suspension shafting.
According to the test experiment table for the anti-falling performance of the magnetic suspension bearing, provided by the embodiment of the invention, the actual working condition can be simulated, the reliability and the service life of the protection bearing can be evaluated, the anti-falling performance of the protection bearing can be researched, and the accuracy of measuring the contact force between the magnetic suspension shafting and the protection bearing is higher.
In addition, the test experiment table for the anti-falling performance of the magnetic suspension bearing provided by the embodiment of the invention has the following additional technical characteristics:
according to some embodiments of the invention, the housing is secured to the support by a spring steel press belt, and the contact force measuring platform further comprises a frame, both of which are mounted on the base.
According to some embodiments of the invention, the radial bearing stators are two and are respectively positioned at the left end and the right end of the shell, each radial bearing stator is in clearance fit with the shell and is fixed in the shell by a shell end cover, and the shell end cover is in threaded connection with the shell.
According to some embodiments of the invention, the axial bearing stator is clearance fit with the housing and comprises: two sub-bearing stators; and the stator gaskets are used for separating the two sub-bearing stators from each other, and the two sub-bearing stators are in threaded connection with the stator gaskets on the shell.
According to some embodiments of the invention, the magnetic levitation shaft system comprises: the left end and the right end of the main shaft extend out of the shell; radial bearing rotor, thrust disk, motor rotor and protection axle sleeve, radial bearing rotor thrust disk motor rotor with the protection axle sleeve respectively with radial bearing stator axial bearing stator motor stator with protection bearing position corresponds, just radial bearing rotor thrust disk motor rotor all with main shaft interference fit, the protection axle sleeve with main shaft clearance fit, the protection axle sleeve passes through round nut to be fixed on the main shaft.
According to some embodiments of the invention, the test bench for the anti-falling performance of the magnetic suspension bearing further comprises a motor water jacket for cooling the motor stator and the shell, wherein the motor water jacket is in interference fit with the motor stator and in clearance fit with the shell, and a water inlet and a water outlet which are respectively communicated with a clearance between the shell and the motor water jacket are arranged on the shell.
Advantageously, the water inlet is located at the bottom of the housing and the water outlet is located at the top of the housing.
In some embodiments of the present invention, a first-stage sealing ring and a second-stage sealing ring are sleeved at both left and right ends of the motor water jacket, the second-stage sealing ring at the left end of the motor water jacket is adjacent to the left end face of the motor water jacket relative to the first-stage sealing ring, and the second-stage sealing ring at the right end of the motor water jacket is adjacent to the right end face of the motor water jacket relative to the first-stage sealing ring.
Further, a leakage port is further formed in the shell, and the leakage port is located between the adjacent first-stage sealing ring and the second-stage sealing ring.
Optionally, a zinc rod for preventing the motor water jacket and the shell from being corroded is arranged between the motor water jacket and the shell, and the zinc rod is installed on the shell through a blocking wire.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a cross-sectional view of a test bench for anti-drop performance of a magnetic bearing according to an embodiment of the invention;
FIG. 2 is a perspective view of the housing of a test bench for the anti-drop performance of a magnetic bearing according to an embodiment of the invention;
FIG. 3 is a perspective view of a radial bearing stator of a test bench for anti-drop performance of a magnetic bearing according to an embodiment of the invention;
FIG. 4 is a perspective view of a sub-bearing stator of a test bench for anti-drop performance of a magnetic bearing according to an embodiment of the invention;
fig. 5 is a schematic structural view of a spindle of a test bench for anti-drop performance of a magnetic suspension bearing according to an embodiment of the invention.
Reference numerals:
a test experiment table 100 for the anti-falling performance of the magnetic suspension bearing,
the device comprises a base 1, a piezoelectric sensor 2, a contact force measuring platform 3, a radial displacement sensor 4, a shell end cover 5, a motor gland 6, a shell 7, a water outlet 8, a motor water jacket 9, a motor stator 10, a hanging hole 11, a spring steel pressure belt 12, a thrust disc 13, a radial bearing stator 14, a radial bearing rotor 15, a protection bearing 16, a round nut 17, an axial displacement sensor 18, a sensor support 19, a frame 20, a protection shaft sleeve 21, an axial bearing stator 22, a stator gasket 23, a support 24, a leakage port 25, a water inlet 26, a motor rotor 27, a zinc rod 28, a blocking wire 29, a first-stage sealing ring 30, a second-stage sealing ring 31 and a main shaft 32.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
A test bench 100 for the anti-drop performance of a magnetic bearing according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 to 5, a test bench 100 for anti-drop performance of a magnetic suspension bearing according to an embodiment of the present invention includes a housing 7, a radial bearing stator 14, an axial bearing stator 22, a motor water jacket 9, a motor stator 10, two protection bearings 16, a magnetic suspension shafting, and two contact force measurement platforms 3.
Specifically, the housing 7 is fixed to the support 24 by the spring steel press belt 12 through screw connection, and the support 24 is connected to the base 1 through bolts. A hanging hole 11 is arranged on the shell 7, and the hanging ring is in threaded connection with the hanging hole 11 so as to facilitate the movement of the shell 7. The radial bearing stator 14, the axial bearing stator 22 and the motor water jacket 9 are assembled in the shell 7 through clearance fit so as to ensure coaxiality among the three.
As shown in fig. 1, two radial bearing stators 14 are respectively located at the left and right ends of the housing 7, and the housing end cover 5 is fixed on the housing 7 by threaded connection to fix the radial bearing stators 14, so that the coaxiality between the two radial bearing stators 14 can be ensured, and the housing end cover is easy to detach and install for a plurality of times. A rubber gasket is arranged between the housing end cap 5 and the radial bearing stator 14 to evenly distribute the pressure exerted by the radial bearing stator 14. As shown in fig. 3, the radial bearing stator 14 adopts an eight-pole structure, and the radial bearing stator 14 is laminated from silicon steel sheets.
As shown in fig. 4, the axial bearing stator 22 is composed of two sub-bearing stators which are spaced apart by a stator shim 23, the stator shim 23 ensuring the spacing and parallelism between the working faces of the two sub-bearing stators. In the axial direction of the axial bearing stator 22 (i.e., the left-right direction as shown in the drawing), the two sub-bearing stators and the stator washer 23 are connected inside the housing 7 by threaded fasteners; in the radial direction (i.e., up-down direction shown in the drawing) of the axial bearing stator 22, the two sub-bearing stators and the stator gasket 23 are respectively clearance-fitted with the housing 7, so that not only the coaxiality between the two sub-bearing stators can be ensured, but also the disassembly and the assembly are easy for many times.
The motor stator 10 is connected to the motor water jacket 9 through interference fit, and the motor gland 6 is in threaded connection with the housing 7 to fix the motor water jacket 9. The bottom of shell 7 is equipped with water inlet 26 and the top is equipped with delivery port 8, and water inlet 26 and delivery port 8 are connected with the clearance between shell 7 and the motor water jacket 9 respectively, and simultaneously, water inlet 26 passes through the outlet of rubber tube and water pump, and delivery port 8 passes through the rubber tube and is connected with the basin, and the water inlet of water pump is connected with the basin, like this, can let in circulating cooling water between motor water jacket 9 and the shell 7 when the motor is operated to cooling motor stator 10 and shell 7.
The left end and the right end of the motor water jacket 9 are respectively sleeved with a first-stage sealing ring 30 and a second-stage sealing ring 31, the second-stage sealing ring 31 at the left end of the motor water jacket 9 is adjacent to the left end face of the motor water jacket 9 relative to the first-stage sealing ring 30, the second-stage sealing ring 31 at the right end of the motor water jacket 9 is adjacent to the right end face of the motor water jacket 9 relative to the first-stage sealing ring 30, and therefore the first-stage sealing ring 30 and the second-stage sealing ring 31 play a role in sealing circulating cooling water. Further, the leakage port 25 is arranged on the casing 7, and the leakage port 25 is positioned between the adjacent first-stage sealing ring 30 and second-stage sealing ring 31, so that water leaked between the two-stage sealing rings can be discharged in time.
Preferably, a zinc bar 28 is provided between the motor water jacket 9 and the housing 7 to act as a sacrificial anode to prevent corrosion of the motor water jacket 9 and the housing 7. The zinc rod 28 is arranged on the shell 7 through the blocking wire 29, and the blocking wire 29 is in threaded connection with the shell 7, so that the zinc rod 28 can be quickly disassembled and replaced.
The magnetic levitation shafting comprises a main shaft 32, a radial bearing rotor 15, a thrust disk 13, a motor rotor 27 and a protection sleeve 21. The radial bearing rotor 15, the thrust disc 13 and the motor rotor 27 are all connected to the main shaft 32 through interference fit, and the radial bearing rotor 15 is formed by laminating silicon steel sheets. The protection sleeve 21 is connected to the main shaft 32 through clearance fit, the round nut 17 used in pairing with the protection sleeve 21 is fixed to the main shaft 32 through threaded connection, so as to lock the protection sleeve 21, and the protection sleeve 21 is easy to detach and replace.
At the left and right ends of the main shaft 32, there are one measurement point each, and four radial displacement sensors 4 are arranged at each measurement point, that is, eight radial displacement sensors 4 are arranged at both ends of the main shaft 32 to measure radial displacement of the magnetic levitation shaft system, that is, displacement of the magnetic levitation shaft system in the radial direction thereof, that is, displacement of the magnetic levitation shaft system in the up-down direction. Wherein each radial displacement sensor 4 is screwed on the housing end cover 5 and is positioned outside the housing 7, and four radial displacement sensors 4 at each measuring point are mounted on the housing end cover 5 in a differential mounting manner. Specifically, two radial displacement sensors 4 are mounted on opposite sides of each measuring point in each direction, for example, one radial displacement sensor 4 is provided in each of the four directions of up, down, front and rear of each measuring point, so that the mechanical coupling component in the dynamic signal can be eliminated.
The axial displacement sensor 18 is for measuring an axial displacement of the spindle 32 (i.e., a displacement of the spindle 32 in the axial direction thereof, i.e., a displacement of the spindle 32 in the left-right direction), the axial displacement sensor 18 is fixed to the sensor mount 19 by screw connection, and the sensor mount 19 is connected to the base 1 by a screw connection. Alternatively, the radial displacement sensor 4 and the axial displacement sensor 18 are both eddy current sensors.
Two contact force measuring platforms 3 are respectively arranged on the left and right sides of the housing 7, each contact force measuring platform 3 comprising a frame 20, the frame 20 being connected to the base 1 by means of bolts. Each contact force measuring platform 3 is provided with a protection bearing 16 and four piezoelectric sensors 2, the protection bearing 16 is composed of a pair of angular contact ball bearings which are arranged face to face, the piezoelectric sensors 2 are piezoelectric quartz sensors, and the contact force measuring platform 3 measures the amplitude and the vibration frequency of the contact force between the protection bearing 16 and the magnetic suspension shafting in the falling process through the piezoelectric sensors 2.
Specifically, the four piezoelectric sensors 2 on each contact force measurement platform 3 are respectively arranged in the horizontal direction (i.e., the front-rear direction) and the vertical direction (i.e., the up-down direction shown in the drawing), so that the contact force between the magnetic levitation shaft system and the protection bearing 16 is transmitted to the piezoelectric sensors 2 arranged in the above four directions in the horizontal direction and the vertical direction, respectively, and the contact force between the magnetic levitation shaft system and the protection bearing 16 is the vector sum of the contact forces in the above four directions.
The operation principle of the test bench 100 for the anti-drop performance of the magnetic bearing according to the embodiment of the present invention is described below with reference to the accompanying drawings.
When the water pump is in operation, the water pump is firstly connected, circulating cooling water enters the motor water jacket 9 from the water inlet 26, the circulating cooling water leaves the motor water jacket 9 from the water outlet 8, and the circulating cooling water leaked from the first-stage sealing ring 30 can be discharged from the leakage port 25; then, the power supplies of the radial displacement sensor 4 and the axial displacement sensor 18 are connected, and the eddy current sensor outputs position signals of the magnetic suspension shafting in five degrees of freedom to the controller; secondly, turning on a power supply of the controller, and starting a calculation program and outputting a current instruction signal by the controller; then, the power amplifier is turned on, a current instruction signal of the controller is changed into current in the coil, so that the main shaft 32 is suspended in the radial direction and the axial direction of the main shaft 32, and closed-loop feedback control of the magnetic suspension bearing is realized; immediately after the asynchronous motor is turned on, the motor stator 10 of the asynchronous motor is connected to a frequency converter, and by varying the frequency of the frequency converter, a stepless speed change of the asynchronous motor between 0 and 18000rpm can be achieved.
The frequency converter and the power amplifier are simultaneously turned off at a given rotating speed, and the free fall test of the magnetic suspension shafting at the rotating speed can be performed. In a drop test of the magnetic suspension shafting, acquiring measurement data of an eddy current sensor through a controller, and transmitting the acquired measurement data to an upper computer; each piezoelectric sensor 2 is communicated with a signal conditioner, the signal conditioner amplifies the contact force signals transmitted by the piezoelectric sensors 2, then the amplified contact force signals are connected into a high-speed acquisition card, and the high-speed acquisition card transmits the amplified contact force signals to an upper computer. Therefore, the display and storage of the real-time signals of the eddy current sensor and the piezoelectric sensor 2 are completed by the upper computer, and the eddy current sensor and the piezoelectric sensor are used for post-processing.
In summary, according to the test bench 100 for the anti-falling performance of the magnetic suspension bearing provided by the embodiment of the invention, the falling test of the magnetic suspension shafting at the initial rotation speed of 0-18000rpm (i.e. different initial rotation speeds) can be completed, and the shafting track during the falling process of the magnetic suspension shafting, the amplitude and the vibration frequency of the contact force between the magnetic suspension shafting and the protection bearing 16 can be recorded; meanwhile, life experiments of the protection shaft sleeve 21 and the protection bearing 16 can be carried out through multiple drop experiments, and the anti-drop performance of the protection bearing 16 is analyzed; and, through using different materials or surface-treated protective shaft sleeve 21, can realize different materials or surface-treated shaft sleeve drop tests and life-span tests, analyze the anti-drop performance of the protective bearing.
In addition, the test experiment table 100 utilizes the two contact force measuring platforms 3 to simultaneously carry out drop experiments on the two protection bearings 16, the two contact force measuring platforms 3 and the magnetic suspension bearing main body adopt a split structure, the interference of magnetic suspension bearing main body components on the contact force measuring platforms 3 is reduced, and the change rule of the contact force between the magnetic suspension shafting and the protection bearings 16 can be measured by utilizing the piezoelectric sensor 2.
In short, the test experiment table 100 for the anti-falling performance of the magnetic suspension bearing according to the embodiment of the invention can evaluate the reliability and the anti-falling performance of the protection bearing 16 under the simulated actual working condition; the magnitude and the vibration frequency of the contact force in each direction received by the protection bearing 16 can be measured by using the four piezoelectric sensors 2, and the contact force between the magnetic suspension shafting and the protection bearing 16 is the vector sum of the contact forces measured by the piezoelectric sensors 2 in the four directions; and through fixing the shell 7 and the two contact force measuring platforms 3 on the base 1 respectively, the interference of the support of the shell 7 on the measurement of the contact force between the magnetic suspension shafting and the protection bearing 16 is reduced, and the measurement precision of the contact force and the vibration frequency in the falling process is improved.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "upper and lower," "left and right," "front and rear," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "particular embodiments," "preferred embodiments," "examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a test experiment table of magnetic suspension bearing anti-drop performance which characterized in that includes:
a housing;
the radial bearing stator, the axial bearing stator and the motor stator are all arranged in the shell, and the two protection bearings are all arranged outside the shell and are respectively positioned at the left end and the right end of the shell;
the magnetic suspension shafting is arranged in the shell, the left end and the right end of the magnetic suspension shafting extend out of the shell respectively, and the magnetic suspension shafting passes through the radial bearing stator, the axial bearing stator, the motor stator and the protection bearing respectively;
the two contact force measuring platforms are arranged outside the shell and are respectively positioned at the left end and the right end of the shell, the protection bearing is arranged on the contact force measuring platforms, and each contact force measuring platform comprises four piezoelectric sensors for measuring the contact force between the protection bearing and the magnetic suspension shafting;
the axial bearing stator is in clearance fit with the housing and includes:
two sub-bearing stators;
a stator shim, by which two of the sub-bearing stators are spaced apart;
in the axial direction of the axial bearing stator, the two sub-bearing stators and the stator gasket are connected in the shell through threaded fasteners; the two sub-bearing stators and the stator gasket are respectively in clearance fit with the housing in a radial direction of the axial bearing stator.
2. The test bench for the anti-falling performance of the magnetic suspension bearing according to claim 1, wherein the shell is fixed on a support by a spring steel press belt, and the contact force measurement platform further comprises a frame, and the frame and the support are both installed on a base.
3. The test bench of claim 1, wherein the radial bearing stators are two and are respectively positioned at left and right ends of the housing, each radial bearing stator is in clearance fit with the housing and is fixed in the housing by a housing end cover, and the housing end cover is in threaded connection with the housing.
4. The test bench for anti-drop performance of a magnetic suspension bearing according to claim 1, wherein the magnetic suspension shafting comprises:
the left end and the right end of the main shaft extend out of the shell;
radial bearing rotor, thrust disk, motor rotor and protection axle sleeve, radial bearing rotor thrust disk motor rotor with the protection axle sleeve respectively with radial bearing stator axial bearing stator motor stator with protection bearing position corresponds, just radial bearing rotor thrust disk motor rotor all with main shaft interference fit, the protection axle sleeve with main shaft clearance fit, the protection axle sleeve passes through round nut to be fixed on the main shaft.
5. The test bench of any of claims 1-4, further comprising a motor water jacket for cooling the motor stator and the housing, the motor water jacket being in interference fit with the motor stator and in clearance fit with the housing, the housing being provided with a water inlet and a water outlet in communication with the gap between the housing and the motor water jacket, respectively.
6. The test bench for the anti-drop performance of a magnetic suspension bearing according to claim 5, wherein the water inlet is positioned at the bottom of the housing and the water outlet is positioned at the top of the housing.
7. The test bench for anti-drop performance of a magnetic suspension bearing according to claim 5, wherein a first-stage sealing ring and a second-stage sealing ring are sleeved at the left end and the right end of the motor water jacket, the second-stage sealing ring at the left end of the motor water jacket is adjacent to the left end face of the motor water jacket relative to the first-stage sealing ring, and the second-stage sealing ring at the right end of the motor water jacket is adjacent to the right end face of the motor water jacket relative to the first-stage sealing ring.
8. The test bench of claim 7, wherein a leak is further provided on the housing, the leak being located between the adjacent first and second seal rings.
9. The test bench for the anti-falling performance of the magnetic suspension bearing according to claim 5, wherein a zinc rod for preventing the motor water jacket and the shell from being corroded is arranged between the motor water jacket and the shell, and the zinc rod is installed on the shell through a blocking wire.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225374.7A CN106950062B (en) | 2017-04-07 | 2017-04-07 | Test experiment table for anti-drop performance of magnetic suspension bearing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710225374.7A CN106950062B (en) | 2017-04-07 | 2017-04-07 | Test experiment table for anti-drop performance of magnetic suspension bearing |
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| CN106950062A CN106950062A (en) | 2017-07-14 |
| CN106950062B true CN106950062B (en) | 2023-11-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108535647B (en) * | 2018-03-28 | 2023-12-05 | 华南理工大学 | Simple experimental platform and method for testing performance of four-degree-of-freedom magnetic levitation motor |
| CN109655265B (en) * | 2018-12-29 | 2020-08-07 | 国创(洛阳)轴承产业技术研究院有限公司 | Magnetic suspension shafting protective bearing performance testing machine |
| CN112504677B (en) * | 2021-02-05 | 2021-04-30 | 天津飞旋科技有限公司 | Method and device for detecting wear data of protective bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201788086U (en) * | 2009-12-31 | 2011-04-06 | 南京磁谷科技有限公司 | Five degree-of-freedom magnetic levitation bearing mechanical test stand |
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| CN103912589A (en) * | 2014-03-25 | 2014-07-09 | 南京航空航天大学 | Centripetal thrust protection bearing device for automatically eliminating clearance |
| CN104879383A (en) * | 2014-11-26 | 2015-09-02 | 北京奇峰聚能科技有限公司 | Protection method for large-capacity magnetic-suspension energy-storing fly wheel rotor after falling down |
| CN106402157A (en) * | 2016-11-16 | 2017-02-15 | 常州工学院 | Magnetic suspension bearing control system capable of realizing resuspension after destabilization and control method thereof |
| CN206756458U (en) * | 2017-04-07 | 2017-12-15 | 清华大学 | The test experimental bed of magnetic suspension bearing anti-dropping capability |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102425561B (en) * | 2011-12-05 | 2014-04-30 | 北京中科科仪股份有限公司 | Dynamic balance method for magnetic suspension molecular pump |
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| CN201788086U (en) * | 2009-12-31 | 2011-04-06 | 南京磁谷科技有限公司 | Five degree-of-freedom magnetic levitation bearing mechanical test stand |
| CN103196671A (en) * | 2013-03-01 | 2013-07-10 | 北京中科科仪股份有限公司 | Device and method of magnetic levitation molecular pump radical protective bearing detection |
| CN103912589A (en) * | 2014-03-25 | 2014-07-09 | 南京航空航天大学 | Centripetal thrust protection bearing device for automatically eliminating clearance |
| CN104879383A (en) * | 2014-11-26 | 2015-09-02 | 北京奇峰聚能科技有限公司 | Protection method for large-capacity magnetic-suspension energy-storing fly wheel rotor after falling down |
| CN106402157A (en) * | 2016-11-16 | 2017-02-15 | 常州工学院 | Magnetic suspension bearing control system capable of realizing resuspension after destabilization and control method thereof |
| CN206756458U (en) * | 2017-04-07 | 2017-12-15 | 清华大学 | The test experimental bed of magnetic suspension bearing anti-dropping capability |
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