CN209197663U - A kind of measuring device of rolling bearing lubrication film thickness - Google Patents
A kind of measuring device of rolling bearing lubrication film thickness Download PDFInfo
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- CN209197663U CN209197663U CN201822159487.4U CN201822159487U CN209197663U CN 209197663 U CN209197663 U CN 209197663U CN 201822159487 U CN201822159487 U CN 201822159487U CN 209197663 U CN209197663 U CN 209197663U
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Abstract
The utility model discloses a kind of measuring device of rolling bearing lubrication film thickness, described device includes outer framework, inner frame, bearing housing, test bearing, magnetic coupling, spring bearing, thermocouple, elastic suspension system, air spring, connecting cable, capacitance compensation box, data acquisition device；The capacitance variations between tested bearing internal external circle are measured, PC machine is transmitted to output voltage after data acquisition device is handled, output voltage is converted into lubrication film thickness value after data processing and stored by PC machine；The measuring device of rolling bearing lubrication film thickness described in the utility model reduces manufacturing cost, the real-time lubrication circumstances suitable for all kinds of rolling bearings of non-destructive testing while using capacitance measurement rolling bearing lubrication film thickness.
Description
Technical field
The utility model discloses a kind of measuring devices of rolling bearing lubrication film thickness, belong to bearing lubrication status monitoring
Technical field.
Background technique
Rolling bearing be equipment with manufacturing industry in other than nuts and bolt the most widely used base parts and components,
Very important effect is played in high-end equipment.China develops by nearly 40 years high-speed industrials, and all trades and professions are to rolling bearing
Demand also constantly promoted.However, the quality level of rolling bearing, which has become, restricts China in high-speed railway, high-accuracy machine
Bed, wind-driven generator and aircraft engine field carry out the fort of entirely autonomous manufacture.According to incompletely statistics, have in the world super
The bearing failure for crossing half is derived from lubrication problem.The main reason for generating lubrication problem is that lubricating film is destroyed, and leads to it not
Can will be completely separable between bearing roller and Internal and external cycle, i.e., have occurred directly to contact and generate between friction pair material and acutely scrape
It wipes, causes friction pair material to generate sharp wear, eventually lead to bearing failure.Therefore, for improve rolling bearing safety and
Service life, the real-time lubrication film thickness for monitoring rolling bearing have important value.But due to the labyrinth of rolling bearing and
Dynamic state of run, therefore, the measurement of oil film thickness in rolling bearing is diagnosed to rolling bearing operating status
Key technology and the maximum parameter of detection difficulty.
In recent years, with the development of China's science and technology, the domestic lubrication film thickness measuring skill for the secondary contact area that rubs
Art research is also increasingly paid attention to, and relevant research and measurement are equipped with very much, as Chinese patent Authorization Notice No. is
CN103196381A, title are as follows: " the novel elastohydrodynamic lubrication film thickness measuring method based on the interference of light ", the shortcomings that the measurement method
Are as follows: optical interferometry requires one of contact material that must have preferable translucency, therefore work can not be carried out in rolling bearing
Industry application.For another example Chinese patent Authorization Notice No. is CN103335616A, title are as follows: " a kind of sliding bearing universe lubricant film is thick
The detection method of distribution ", wherein being measured using supercritical ultrasonics technology lubrication film thickness, although its penetration capacity compensates for light and does
The deficiency of method is related to, but due to the difficulty in separate and practical application, supercritical ultrasonics technology is not yet obtained in the test of bullet stream film thickness at present
It is widely applied.Rolling bearing, which is hit by a bullet, to flow lubricating oil film thickness angle value and is typically in micron level, relatively more tired using direct measurement method
Difficulty, capacity measurement method are a kind of technologies of comparative maturity, are a kind of generally acknowledged effective detection rolling bearing lubrication oil film thicknesses
Method.The principle of capacity measurement method is to judge oil film thickness by the capacitance between measurement two articles, is a kind of quantitative survey
Measure the short-cut method of oil film thickness.
Utility model content
The utility model aim is to provide a kind of measuring device of rolling bearing lubrication film thickness, in conjunction with capacitance measurement skill
Art can be used in the information for detecting and obtaining rolling bearing lubrication oil film thickness in actual condition.
In order to reach the goals above, the utility model, which adopts the following technical scheme that, is achieved: a kind of rolling bearing
Lubricate film thickness measuring device, including outer framework, bearing support, main shaft, permanent magnet, direct current generator, test bearing, bearing housing,
Chuck, elastic suspension system, folds leaf spring, inner frame, air spring, linear bearing, bracket, stepper motor, capacitor at thermocouple
Compensation box, connecting cable, data acquisition device, PC machine；
The bearing support is mounted in the inside of the outer framework, and the bearing support inner ring is adapted to main shaft outer diameter；It is described
Main shaft outer end is equipped with permanent magnet, and the outer diameter of the main shaft inner end and the inner ring of the test bearing cooperate；The main shaft outer end
Another permanent magnet of the spindle nose of permanent magnet and direct current generator cooperates, by direct current generator output power to main shaft；The direct current
Motor is connect with PC machine, and the revolving speed of test bearing inner ring is controlled by PC machine；
The test bearing is loaded in the bearing housing, and its side and chuck cooperate；Equipped with heat in the bearing housing
Galvanic couple measures the temperature of test bearing outer ring；The other side of the elastic suspension system and the chuck cooperates, and leads to
Folding leaf spring is crossed to connect with inner frame；
The inner frame passes through a pair of of air spring and connect with outer framework；The linear bearing will step under the bearing of bracket
Shaft into motor connects；The capacitance compensation box is connected by connecting cable test bearing Internal and external cycle, the data acquisition device
It is connect with capacitance compensation box；The PC machine is connect with data acquisition device, thermocouple, direct current generator and stepper motor respectively；
The side of the outer framework is provided with two groups of power packages, and one group of power packages is set to the radial direction side of the test bearing
To for radial power packages；Another group of power packages are set to the axial direction of the test bearing, and for axial power packages, two groups dynamic
The structure of power group is identical；
The power packages include linear bearing, bracket and stepper motor, and the linear bearing is installed in stepper motor
On the bracket, one end of the linear bearing is connect with the stepper motor, and the other end outer framework of the linear bearing connects
It connects.
Preferably, in the measuring device of the rolling bearing lubrication film thickness, the outer framework includes that shape is in the same size
Preceding rectangle rack and rear rectangle rack, the preceding rectangle rack and rear rectangle rack are connected by upper and lower two pairs cross one another cylindrical ribs
It connects, a rectangle rib is respectively set in the middle part of the side wall of the left and right sides of the preceding rectangle rack and rear rectangle rack；
The diagonal angle of the preceding rectangle rack is equipped with two cross one another rectangle diagonal rib items, the left and right side of the preceding rectangle rack
A rectangle cross rib item is equipped at frame center；The rectangle diagonal rib item and rectangle cross rib item disconnect at preceding rectangle rack center, shape
At center ring, the bearing support is in the center ring, and the main shaft is threaded through in the bearing support, the main shaft
Tail portion is connect with the test bearing；Rectangle rack is identical as the structure of the preceding rectangle rack after described.
Preferably, in the measuring device of the rolling bearing lubrication film thickness, the bearing housing is set in the inner frame,
The bearing housing includes a small half of round strip and large semicircle strip, the small semicircle strip and large semicircle strip equivalent width and by
Four bolts are attached, test bearing to be fixed radially.
Preferably, in the measuring device of the rolling bearing lubrication film thickness, the chuck is set in the bearing housing,
The test bearing is fixed in the chuck；
It is opened on the downside of the large semicircle strip of the bearing housing there are two circular hole, respectively thermocouple mounting hole and connecting cable connects
Mouthful, the installation of TC measures test bearing outer ring temperature and is transmitted to PC machine and carries out in the thermocouple mounting hole
Storage；By connecting cable interface so that test bearing outer ring is connected to capacitance compensation box.
Preferably, in the measuring device of the rolling bearing lubrication film thickness, the bearing housing passes through elastic suspension system
It is installed in the inner frame, the circle that the inner frame is mutually intersected in 30 degree of angles by forward annular frame and tail portion toroidal frame through three Duis
Mast connects to be formed；
The side of the forward annular frame is respectively provided with a flat mouth, and air spring, the forward annular frame are installed at flat mouth
On air spring connect with the rectangle rib at outer framework frame center, an air bullet is also provided on the tail portion toroidal frame
Spring, the upper air spring of the tail portion toroidal frame are connect with the circular seat at rear rectangle rack center.
Preferably, in the measuring device of the rolling bearing lubrication film thickness, the elastic suspension system is installed on described
In inner frame, the elastic suspension system includes pedestal, top annular seat and connecting cylinder, and setting three pieces are identical on the pedestal
Folding leaf spring, the pedestal connect by three folding leaf springs with the forward annular frame of the inner frame, the connecting cylinder
It fixes on the base, the top annular seat is fixed on the connecting cylinder.
Preferably, in the measuring device of the rolling bearing lubrication film thickness, the top annular of the elastic suspension system
Seat is connect with the chuck in the bearing housing, and the pedestal is connect with the upper air spring of the tail portion toroidal frame, the bottom
Two leaf springs are symmetrical arranged on seat, the rectangle rib being arranged respectively with the side wall middle part at left and right sides of outer framework by two leaf springs
Connection.
A kind of test method of rolling bearing lubrication film thickness, it is real using the measuring device of above-mentioned rolling bearing lubrication film thickness
It is existing, comprising the following steps:
(1) test bearing loads: loading the test bearing for having filled lubricant in main shaft tail, and test bearing is packed into
In bearing housing；
(2) calibration debugging is carried out to system: in the case where loading test bearing, adjusts the optional benefit on capacitance compensation box
Capacitance is repaid, until voltage value shown by PC machine is equal to zero；
(3) carry out rolling bearing test: then driving stepper motor load measurement load drives direct current generator to test axis
Application measurement revolving speed is held, measurement gained capacitance is converted into output voltage values and is transmitted to PC machine and carries out real-time by data acquisition device
Storage, the test bearing outer ring real time temperature of the synchronous storage thermocouple record of PC machine, the test bearing of direct current generator driving are real-time
Revolving speed and the real-time load of stepper motor load；
(4) establish output voltage and lubricate the mathematical relationship of film thickness: by the lubricating oil of known viscosity inject test bearing into
Row test, and output voltage values and lubricating film empirical formula lubrication film thickness value calculated are compared, obtain output
Mathematical relationship between voltage and lubrication film thickness value；
(5) measured output voltage values are substituted into output voltage by PC machine and lubricates the relationship between film thickness value
In, obtain the real-time lubrication film thickness value of test bearing.
The utility model compared with prior art, has the following advantages that and prominent effect:
The utility model can effectively obtain oil film thickness at the secondary contact point of rolling bearing friction using capacitance measuring technique,
To create conditions for the research of the tribological property of rolling bearing.This method is able to detect the lubrication of rolling bearing under actual condition
Situation, even be conducive to find that mill situation is touched in partial lubrication failure in time.
Detailed description of the invention
Fig. 1 is the schematic diagram of the measuring device of the utility model；
Fig. 2 is the structural schematic diagram of the measuring device of the utility model；
Fig. 3 is the structural schematic diagram of the outer framework of the measuring device of the utility model；
Fig. 4 is the structural schematic diagram of the bearing housing of the measuring device of the utility model；
Fig. 5 is the elastic suspension system structural schematic diagram of the measuring device of the utility model；
Fig. 6 is to be lubricated film thickness measuring schematic diagram using the test device in the utility model；
Shown in the figures above:
Outer framework (1), bearing support (2), main shaft (3), permanent magnet (4), test bearing (5), bearing housing (6), chuck
(7), elastic suspension system (8), folding leaf spring (9), inner frame (10), air spring (11), linear bearing (12), bracket
(13), stepper motor (14), capacitance compensation box (15), data acquisition device (16), PC machine (17), preceding rectangle rack (101), rear rectangle
Frame (102), cylindrical rib (103), rectangle rib (104), rectangle diagonal rib item (105), rectangle cross rib item (106), center ring
(107), circular seat (108), thermocouple (601), large semicircle strip (602), small semicircle strip (603), connecting cable interface
(604), pedestal (801), top annular seat (802), connecting cylinder (803), forward annular frame (1001), tail portion toroidal frame
(1002), cylindrical bar (1003), leaf spring (1004).
Specific embodiment
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.The preferred embodiment of the utility model is given in this specification and its attached drawing, still, the utility model can be with
It realizes in many different forms, however it is not limited to this specification described embodiment.On the contrary, providing these embodiments
Purpose is to make the understanding of the disclosure of the utility model more thorough and comprehensive.The similar unit of structure is with phase in the figure
It is indicated with label.
As shown in figures 1 to 6, a kind of measuring device of rolling bearing lubrication film thickness, including outer framework (1), bearing support (2),
Main shaft (3), permanent magnet (4), direct current generator, test bearing (5), bearing housing (6), chuck (7), thermocouple (601), resilient suspension
System (8) folds leaf spring (9), inner frame (10), air spring (11), linear bearing (12), bracket (13), stepper motor
(14), capacitance compensation box (15), connecting cable, data acquisition device (16), PC machine (17).It measures between tested bearing internal external circle
Capacitance variations, are transmitted to PC machine after data acquisition device is handled with output voltage, and PC machine after data processing will output
Voltage is converted into lubrication film thickness value and is stored.
The bearing support (2) is mounted in the inside of the outer framework (1), and bearing support (2) inner ring and main shaft (3) are outside
Diameter adaptation；Main shaft (3) outer end is equipped with permanent magnet (4), outer diameter and the test bearing (5) of main shaft (3) inner end
Inner ring cooperation；Another permanent magnet (4) of main shaft (3) end of the permanent magnet (4) and direct current generator of main shaft (3) outer end is matched
It closes, by direct current generator output power to main shaft (3)；The direct current generator is connect with PC machine, controls test bearing (5) by PC machine
The revolving speed of inner ring；The test bearing (5) is loaded in the bearing housing (6), and its side and chuck (7) cooperate；The axis
It holds in case (6) equipped with thermocouple (601), the temperature of test bearing (5) outer ring is measured；The elastic suspension system (8)
Cooperate with the other side of the chuck (7), and connect by folding leaf spring (9) with inner frame (10)；The inner frame (10) is logical
A pair of of air spring (11) is crossed to connect with outer framework (1)；The linear bearing (12) is under the bearing of bracket (13) by stepping electricity
The shaft of machine (14) connects；The capacitance compensation box is connected by connecting cable test bearing (5) Internal and external cycle, the data acquisition
Case is connect with capacitance compensation box；The PC machine respectively with data acquisition device, thermocouple (601), direct current generator and stepper motor
(14) it connects, the temperature value of the voltage value of data acquisition device output and thermocouple (601) record is subjected to real-time synchronization storage, it is right
Direct current generator, which is controlled, applies different rotating speeds to test bearing (5), and is controlled stepper motor (14) to test bearing
(5) different axially and radially load is loaded.
The outer framework (1) includes shape preceding rectangle rack (101) of the same size and rear rectangle rack (102), the preceding square
Shape frame (101) is connect with rear rectangle rack (102) by upper and lower two pairs cross one another cylindrical ribs (103), the preceding rectangle
A rectangle rib (104) is respectively set in the middle part of the side wall of the left and right sides of frame (101) and rear rectangle rack (102)；The preceding rectangle
The diagonal angle of frame (101) is equipped with two cross one another rectangle diagonal rib items (105), the left and right side frame of the preceding rectangle rack (101)
A rectangle cross rib item (106) is equipped at center；The rectangle diagonal rib item (105) and rectangle cross rib item (106) are in preceding rectangle rack
(101) it disconnects, is formed center ring (107) at center, the bearing support (2) is in the center ring (107), the main shaft
(3) it is threaded through in the bearing support (2), the tail portion of the main shaft (3) is connect with the test bearing (5)；Rectangle after described
Frame (102) is identical as the structure of the preceding rectangle rack (101), the difference is that, the rectangle diagonal rib item (105) of preceding rectangle rack with
Rectangle cross rib item (106) disconnects at preceding rectangle rack (101) center, is formed center ring (107)；The rectangle diagonal rib item of rectangle rack afterwards
(105) circular seat (108) are formed at preceding rectangle rack (101) center with rectangle cross rib item (106).
The bearing housing (6) is set in the inner frame (10), and the bearing housing (6) includes a small half of round strip (603)
With large semicircle strip (602), the small semicircle strip (603) and large semicircle strip (602) equivalent width and by four bolts into
Row connection, test bearing (5) to be fixed radially.Preferably, the chuck (7) is set to the bearing housing (6)
Interior, the test bearing (5) is fixed in the chuck (7)；It is provided on the downside of the large semicircle strip (602) of the bearing housing (6)
Two circular holes, respectively thermocouple (601) mounting hole and connecting cable interface (604), the thermocouple (601) are mounted on described
Thermocouple (601) mounting hole measures to test bearing (5) outer ring temperature and is transmitted to PC machine and stores；Pass through connection electricity
Cable interface (604) is to be connected to capacitance compensation box for test bearing (5) outer ring.
The bearing housing (6) is installed in the inner frame (10) by elastic suspension system (8), the inner frame (10)
Shape mutually is connected in the cylindrical bar (1003) that 30 degree of angles intersect through three pairs by forward annular frame (1001) and tail portion toroidal frame (1002)
At；The side of the forward annular frame (1001) is respectively provided with a flat mouth, installs air spring (11) at flat mouth, the front ring
Air spring (11) on shape frame (1001) is connect with the rectangle rib (104) at outer framework (1) frame center, in the tail portion
It is also provided on toroidal frame (1002) air spring (11), the upper air spring (11) of the tail portion toroidal frame (1002) is with after
Circular seat (108) connection at rectangle rack (102) center.
The elastic suspension system (8) is installed in the inner frame (10), and the elastic suspension system (8) includes pedestal
(801), top annular seat (802) and connecting cylinder (803), the identical folding leaf spring of setting three pieces on the pedestal (801)
(9), the pedestal (801) is connect by three foldings leaf spring (9) with the forward annular frame (1001) of the inner frame (10), institute
It states connecting cylinder (803) to be fixed on the pedestal (801), the top annular seat (802) is fixed on the connecting cylinder
(803) on.Preferably, the chuck (7) in the top annular seat (802) of the elastic suspension system (8) and the bearing housing (6)
Connection, the pedestal (801) connect with the upper air spring (11) of the tail portion toroidal frame (1002), the pedestal (801)
It is upper to be symmetrical arranged two leaf springs (1004), by two leaf springs (1004) respectively and in the middle part of the side wall at left and right sides of outer framework (1)
The rectangle rib (104) of setting connects.
The side of the outer framework (1) is provided with two groups of power packages, and one group of power packages is set to the test bearing (5)
Radial direction, for radial power packages；Another group of power packages are set to the axial direction of the test bearing (5), for axial power
The structure of group, two groups of power packages is identical.The power packages include linear bearing (12), bracket (13) and stepper motor (14), institute
It states linear bearing (12) and stepper motor (14) to be installed on the bracket (13), one end of the linear bearing (12) and institute
State stepper motor (14) connection, other end outer framework (1) connection of the linear bearing (12).
As shown in Fig. 2,3,4,5, bearing support (2) is gone forward rectangle rack (101) revenue centre ring mounted in outer framework (1)
(107) inside, bearing support (2) inner ring and main shaft (3) major diameter fit.Main shaft (3) outer end is equipped with permanent magnet (4), in main shaft (3)
Outer diameter and test bearing (5) inner ring is held to cooperate.Main shaft (3) outer end is copper structure and permanent magnet (4) and direct current owner thereon
Another permanent magnet in shaft end portion is cooperated, and by direct current generator output power to main shaft (3), and then passes through main shaft (3) driving test
The rotation of bearing (5) inner ring, direct current generator are connect with PC machine, by the revolving speed of PC machine controllable testing bearing (5) inner ring, thus
The lubrication film thickness of rolling bearing under the conditions of test different rotating speeds.Test bearing (5) is loaded in bearing housing (6), and its side with
Chuck (7) cooperation.The temperature of test bearing (5) outer ring is measured equipped with thermocouple (601) in bearing housing (6).Elastic suspended
The other side of frame system (8) and chuck (7) cooperates, and is connect by folding leaf spring (9) with inner frame (10).Inner frame (10) is logical
A pair of of air spring (11) is crossed to connect with outer framework (1).Linear bearing (12) is under the bearing of bracket (13) by stepper motor
(14) power transmission applies axial load to air spring (11) and finally to test bearing (5).The radial direction of test bearing (5)
Load is applied the power transmission of another stepper motor to outer framework (1) by another linear bearing afterwards.Capacitance compensation box passes through company
The connection of wireline test bearing (5) Internal and external cycle is connect, data acquisition device is connect with capacitance compensation box, and the capacitance signal measured is turned
Change voltage value (V intoOutput) it is sent to PC machine, PC machine is connect with data acquisition device, thermocouple, direct current generator and stepper motor, will
The voltage value of data acquisition device output and the temperature value of thermocouple record carry out real-time synchronization storage, control direct current generator
Different rotating speeds are applied to test bearing, and stepper motor is controlled and loads different axially and radially loads to test bearing
Lotus.
Outer framework (1) structure of the present apparatus is as shown in Figure 3.Outer framework (1) is by shape preceding rectangle rack (101) of the same size
With rear rectangle rack (102), pass through one at upper and lower two pairs cross one another cylindrical ribs (103) and left and right side frame center
It is formed by connecting to rectangle rib (104).Preceding rectangle rack (101) diagonal angle has two cross one another rectangle diagonal rib items (105) even
It connects, there is rectangle cross rib item (106) connection at left and right side frame center.Rectangle diagonal rib item (105) and rectangle cross rib item (106) exist
It disconnects at preceding rectangle rack (101) center, is attached by a center ring (107).Rectangle rack (102) shape and connection type afterwards
Unanimously with preceding rectangle rack (101), unique difference is diagonal rib item and cross rib item is carried out by frame center one end circular seat (108)
Connection, center ring (107) and circular seat (108) outer diameter are in the same size.It is such to be laid out while improving whole device rigidity,
Certain elasticity is maintained, makes outer framework (1) that there can be a small amount of deflection in stress.
Bearing housing (6) structure of the present apparatus is as shown in Figure 4.Test bearing (5) inner ring and main shaft (3) tail portion cooperate, outer ring
Cooperate with small semicircle strip (603) made of two pieces of PTFE materials and large semicircle strip (602), small semicircle strip (603) and big
Semicircle strip (602) equivalent width is simultaneously attached by 4 bolts, test bearing (5) outer ring to be fixed radially.
Cooperate on the outside of test bearing (5) with chuck (7), and is simultaneously consolidated test bearing (5) in the axial direction with main shaft (3) tail portion
It is fixed.Meanwhile large semicircle strip (602) on the downside of be provided with two circular holes, respectively install thermocouple (601) to test bearing outer ring temperature into
Row measures and is transmitted to that PC machine is stored and connecting cable interface (604) is to be connected to electricity for test bearing (5) outer ring
Hold compensation box.
The elastic suspension system (8) and inner frame (10) structure of the present apparatus are as shown in Figure 5.Elastic suspension system (8) with
And inner frame (10) passes through identical folding leaf spring (9) connection of three pieces.Elastic suspension system (8) is by pedestal (801), top annular
Seat (802) and connecting cylinder (803) composition.Top annular seat (802) is connect with chuck (7), pedestal (801) and air spring
(11) it connects, bears from the load of air spring (11) and by load transmission to chuck (7), to apply to test bearing (5)
Axial force.The circle that inner frame (10) is mutually intersected in 30 degree of angles by forward annular frame (1001) and tail portion toroidal frame (1002) through 3 Duis
Mast (1003) connection is formed.Forward annular frame (1001) side cuts with a flat mouth, by the flat mouth with air spring (11)
Cooperation absorbs the vibration generated in test process.Two air springs (11) respectively with the rectangular fin at outer framework (1) frame center
Circular seat (108) connection at item (104) and rear rectangle rack (102) center.It is symmetrical equipped with two panels on pedestal (801)
Leaf spring (1004), leaf spring (1004) are connect with a pair of of rectangle rib (104) at left and right side frame center in outer framework (1).
A kind of test method of rolling bearing lubrication film thickness, it is real using the measuring device of above-mentioned rolling bearing lubrication film thickness
It is existing, comprising the following steps:
(1) test bearing loads: loading the test bearing for having filled lubricant in main shaft tail, and test bearing is packed into
In bearing housing；
(2) calibration debugging is carried out to system: in the case where loading test bearing, adjusts the optional benefit on capacitance compensation box
Capacitance is repaid, until voltage value shown by PC machine is equal to zero；
(3) carry out rolling bearing test: then driving stepper motor load measurement load drives direct current generator to test axis
Application measurement revolving speed is held, measurement gained capacitance is converted into output voltage values and is transmitted to PC machine and carries out real-time by data acquisition device
Storage, the test bearing outer ring real time temperature of the synchronous storage thermocouple record of PC machine, the test bearing of direct current generator driving are real-time
Revolving speed and the real-time load of stepper motor load；
(4) establish output voltage and lubricate the mathematical relationship of film thickness: by the lubricating oil of known viscosity inject test bearing into
Row test, and output voltage values and lubricating film empirical formula lubrication film thickness value calculated are compared, obtain output
Mathematical relationship between voltage and lubrication film thickness value；
(5) measured output voltage values are substituted into output voltage by PC machine and lubricates the relationship between film thickness value
In, obtain the real-time lubrication film thickness value of test bearing.
Specifically, being comprised the steps of: using the method that above-mentioned apparatus carries out the test of rolling bearing lubrication film thickness
1, test bearing loads: under a constant that the test bearing (5) for having filled lubricant is slow using hydraulic press
Be loaded in main shaft (3) tail portion, when loading, pays attention to making test bearing inner ring (5) face main shaft (5) outer diameter, makes to survey in hydraulic process
Bearing uniform stressed is tried, keeps its radial direction vertical with main shaft axial direction always in loading process.Then by test bearing
(5) it is fitted into bearing housing (6), small semicircle strip (603) is fastened on large semicircle strip (602) using bolt, to test axis
It holds (5) radial direction to be fixed, and main shaft (5) is fixed on the preceding rectangle rack (101) in outer framework (1), to test axis
(5) axial direction is held to be fixed.Then, test bearing (5) Internal and external cycle is connected with capacitance compensation box using connecting cable
It connects.
2, calibration debugging is carried out to system: opens capacitance compensation box, is provided with sample capacitor (capacitance in capacitance compensation box
Cs), it selectes referring to capacitance (Cr) and maximum output voltage value Vmax, turn-on data vasculum and PC machine, output voltage Vt
=Vmax×Cr/(Cr+Cs).Before test bearing gets into smooth, have between rolling element and Internal and external cycle and directly contact, at this time measurement electricity
Capacitance is infinity, and output voltage VtZero should be equal to.
3, rolling bearing test is carried out: firstly, setting axial test bearing, radial load value and revolving speed in PC machine
Value, driving stepper motor Slow loading measure load, and direct current generator is then driven to apply measurement revolving speed to test bearing, and revolving speed increases
Add process unsuitable too fast, whether observe test bearing in accelerator there are abnormal conditions (such as: test bearing is injecting excessive viscosity
In the case of very high lubricating grease, initial stage frictional resistance is larger, and the main shaft power of permanent magnet transmitting is insufficient to allow test bearing
Bearing deadlock phenomenon can uninterruptedly occur in even running).Data acquisition device will measure gained capacitance and be converted into output voltage values
It is transmitted to PC machine and is stored in real time, test bearing outer ring real time temperature, the direct current of the synchronous storage thermocouple record of PC machine
The real-time revolving speed of test bearing of machine driving and the real-time load of stepper motor load.
4, it establishes output voltage and lubricates the mathematical relationship of film thickness: the lubricating oil injection test bearing of known viscosity is carried out
Test, and by output voltage values and lubricating film empirical formula (such as: Hamrock-Dowson formula) lubricating film calculated
Thick value compares, and obtains output voltage and lubricates the mathematical relationship between film thickness value.
5, measured output voltage values are substituted into output voltage by PC machine and lubricated in the relationship between film thickness value,
Obtain the real-time lubrication film thickness value of test bearing.Fig. 6, which is shown, measures certain zanjon using the test device in the utility model
Dynamically lubricating film thickness measuring result of ball bearing under the conditions of certain commercial oil lubrication.
It should be noted that above-mentioned each technical characteristic continues to be combined with each other, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the range of the utility model specification record；Also, it for those of ordinary skills, can be according to above stating
It is bright to be improved or converted, and all these modifications and variations all should belong to the protection model of the appended claims for the utility model
It encloses.
Claims (7)
1. a kind of measuring device of rolling bearing lubrication film thickness, which is characterized in that including outer framework, bearing support, main shaft, permanent magnetism
Iron, test bearing, bearing housing, chuck, thermocouple, elastic suspension system, folds leaf spring, inner frame, air bullet at direct current generator
Spring, capacitance compensation box, connecting cable, data acquisition device, PC machine；
The bearing support is mounted in the inside of the outer framework, and the bearing support inner ring is adapted to main shaft outer diameter；The main shaft
Outer end is equipped with permanent magnet, and the outer diameter of the main shaft inner end and the inner ring of the test bearing cooperate；The permanent magnetism of the main shaft outer end
Another permanent magnet of the spindle nose of iron and direct current generator cooperates, by direct current generator output power to main shaft；The direct current generator
It is connect with PC machine, the revolving speed of test bearing inner ring is controlled by PC machine；
The test bearing is loaded in the bearing housing, and its side and chuck cooperate；Thermocouple is housed in the bearing housing,
The temperature of test bearing outer ring is measured；The other side of the elastic suspension system and the chuck cooperates, and passes through folding
Laminated leaf spring is connect with inner frame；
The inner frame passes through a pair of of air spring and connect with outer framework；Linear bearing is under the bearing of bracket by stepper motor
Shaft connection；The capacitance compensation box is connected by connecting cable test bearing Internal and external cycle, and the data acquisition device and capacitor are mended
Repay case connection；The PC machine is connect with data acquisition device, thermocouple, direct current generator and stepper motor respectively；
The side of the outer framework is provided with two groups of power packages, and one group of power packages is set to the radial direction of the test bearing,
For radial power packages；Another group of power packages are set to the axial direction of the test bearing, for axial power packages, two groups of power packages
Structure it is identical；
The power packages include linear bearing, bracket and stepper motor, and the linear bearing and stepper motor are installed in described
On bracket, one end of the linear bearing is connect with the stepper motor, the other end outer framework connection of the linear bearing.
2. the measuring device of rolling bearing lubrication film thickness according to claim 1, which is characterized in that the outer framework includes
Shape preceding rectangle rack of the same size and rear rectangle rack, the preceding rectangle rack are cross one another by upper and lower two pairs with rear rectangle rack
A rectangle rib is respectively set in the middle part of the side wall of the left and right sides of cylindrical rib connection, the preceding rectangle rack and rear rectangle rack；
The diagonal angle of the preceding rectangle rack is equipped with two cross one another rectangle diagonal rib items, in the left and right side frame of the preceding rectangle rack
A rectangle cross rib item is equipped at the heart；The rectangle diagonal rib item and rectangle cross rib item disconnect at preceding rectangle rack center, in formation
Thimble, the bearing support is in the center ring, and the main shaft is threaded through in the bearing support, the tail portion of the main shaft
It is connect with the test bearing；Rectangle rack is identical as the structure of the preceding rectangle rack after described.
3. the measuring device of rolling bearing lubrication film thickness according to claim 2, which is characterized in that the bearing housing is set to
In the inner frame, the bearing housing includes a small half of round strip and large semicircle strip, the small semicircle strip and large semicircle card
Equivalent width is simultaneously attached by four bolts, test bearing to be fixed radially.
4. the measuring device of rolling bearing lubrication film thickness according to claim 3, which is characterized in that the chuck is set to
In the bearing housing, the test bearing is fixed in the chuck；
It is opened on the downside of the large semicircle strip of the bearing housing there are two circular hole, respectively thermocouple mounting hole and connecting cable interface,
The installation of TC measures to test bearing outer ring temperature in the thermocouple mounting hole and is transmitted to PC machine and stores up
It deposits；By connecting cable interface so that test bearing outer ring is connected to capacitance compensation box.
5. the measuring device of rolling bearing lubrication film thickness according to claim 4, which is characterized in that the bearing housing passes through
Elastic suspension system is installed in the inner frame, and the inner frame is mutually in 30 through three pairs by forward annular frame and tail portion toroidal frame
The cylindrical bar that degree angle intersects connects to be formed；
The side of the forward annular frame is respectively provided with a flat mouth, the installation air spring at flat mouth, on the forward annular frame
Air spring is connect with the rectangle rib at outer framework frame center, is also provided with an air spring on the tail portion toroidal frame,
The upper air spring of the tail portion toroidal frame is connect with the circular seat at rear rectangle rack center.
6. the measuring device of rolling bearing lubrication film thickness according to claim 5, which is characterized in that the resilient suspension system
System is installed in the inner frame, and the elastic suspension system includes pedestal, top annular seat and connecting cylinder, on the pedestal
The identical folding leaf spring of three pieces is set, the pedestal is connect by three folding leaf springs with the forward annular frame of the inner frame,
The connecting cylinder is fixed on the base, and the top annular seat is fixed on the connecting cylinder.
7. the measuring device of rolling bearing lubrication film thickness according to claim 6, which is characterized in that the resilient suspension system
The top annular seat of system is connect with the chuck in the bearing housing, the upper air spring of the pedestal and the tail portion toroidal frame
It connects, two leaf springs is symmetrical arranged on the pedestal, set respectively in the middle part of the side wall at left and right sides of outer framework by two leaf springs
The rectangle rib connection set.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110715804A (en) * | 2019-10-14 | 2020-01-21 | 北京理工大学 | Distribution observation test bed for lubricating medium of rolling bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110715804A (en) * | 2019-10-14 | 2020-01-21 | 北京理工大学 | Distribution observation test bed for lubricating medium of rolling bearing |
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