CN109540516A - Rolling bearing equlvalent coefficient of friction measuring device and method - Google Patents

Rolling bearing equlvalent coefficient of friction measuring device and method Download PDF

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Publication number
CN109540516A
CN109540516A CN201811283092.3A CN201811283092A CN109540516A CN 109540516 A CN109540516 A CN 109540516A CN 201811283092 A CN201811283092 A CN 201811283092A CN 109540516 A CN109540516 A CN 109540516A
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CN
China
Prior art keywords
rolling bearing
friction
air
main shaft
floating main
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Pending
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CN201811283092.3A
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Chinese (zh)
Inventor
任成祖
葛翔
陈�光
陈洋
闫传滨
靳新民
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Tianjin University
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Tianjin University
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Application filed by Tianjin University filed Critical Tianjin University
Priority to CN201811283092.3A priority Critical patent/CN109540516A/en
Publication of CN109540516A publication Critical patent/CN109540516A/en
Priority claimed from PCT/CN2019/113880 external-priority patent/WO2020088431A1/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/04Bearings

Abstract

The invention discloses a kind of rolling bearing equivalent equlvalent coefficient of friction measuring devices, including fuselage, air-floating main shaft component, mandrel, slide unit, bearing block, speed probe, data acquisition/processing/calculating/display system.Air-floating main shaft component includes air-floating main shaft matrix and air-floating main shaft;Air-floating main shaft matrix and fuselage are connected, and mandrel is connect by cone match with air-floating main shaft;The inner ring of tested rolling bearing is installed on the shaft shoulder of mandrel, and the outer ring of tested rolling bearing is installed on the shoulder block of bearing block;Bearing block and slide unit are connected;Slide unit can be translatable under the guidance of guiding parts along the axial direction of air-floating main shaft;Data acquisition/processing/calculating/display system is used to acquire, handle the angular velocity signal of mandrel or air-floating main shaft that speed probe monitors, calculates the equivalent friction torque and equlvalent coefficient of friction of tested rolling bearing.Measuring device of the present invention has the ability of fast precise measurement rolling bearing equivalent friction torque and equlvalent coefficient of friction.

Description

Rolling bearing equlvalent coefficient of friction measuring device and method
Technical field
The invention belongs to rolling bearing friction energy loss characteristic test technical fields, are related to a kind of rolling bearing equivalent friction system Number measuring device and method.
Background technique
Friction energy loss in rolling bearing operational process directly affects fever, temperature rise and abrasion of bearing etc., and then influences The performance of rolling bearing and service life.The friction energy loss characteristic of rolling bearing is a kind of inherent characteristic of rolling bearing itself, centainly The manufacture quality and clean-up performance of rolling bearing are reflected in degree.
Starting moment of friction and pivoting friction torque is respectively adopted at this stage to evaluate the starting friction energy loss of rolling bearing With pivoting friction energy consumption, and the starting frictional force of tested rolling bearing is measured using various Frictional Moment for Rolling Bearings measuring device Square and pivoting friction torque.
Since the starting moment of friction of rolling bearing under test condition and the amplitude of pivoting friction torque are smaller, existing rolling Precision is not obviously when carrying out high-acruracy survey for micro- power used in dynamic bearing measurement of friction torque device or micro-torque sensor Foot.Therefore, need to develop a kind of new measurement for detecting rolling bearing friction energy loss characteristic.
Summary of the invention
In view of the problems of the existing technology, the present invention proposes a kind of for angular contact ball bearing, thrust ball bearing and list Row tapered roller bearing equlvalent coefficient of friction measuring device and method.Rolling bearing of the present invention includes angular contact ball axis It holds, thrust ball bearing and single-row tapered roller bearing.In the present invention, by tested rolling bearing be abstracted as a contact angle it is constant, Be slidably matched the virtual sliding bearing at the excessively tested rolling bearing rolling element center in face, i.e., the described virtual sliding bearing is a contact Angle is equal with tested rolling bearing contact angle, the virtual sliding axle at the excessively tested rolling bearing rolling element center in the face that is slidably matched It holds, the inner ring of the virtual sliding bearing and the outer ring of virtual sliding bearing form sliding friction pair at the face of being slidably matched.It will The virtual sliding bearing is under Test Cycle identical with corresponding tested rolling bearing, the friction of the sliding friction pair Power consumption is equivalent to the friction power loss of tested rolling bearing, and the friction horsepower of the sliding friction pair is equal to the sliding friction pair The product of the revolution angular speed of sliding friction torque and the virtual sliding bearing, the sliding friction torque of the sliding friction pair Equal to the friction of normal direction load and the sliding friction pair at the central radius in the face that is slidably matched, the face that is slidably matched The product of coefficient.The equivalent that the sliding friction torque of the sliding friction pair is denoted as tested rolling bearing of the present invention is rubbed Torque is wiped, the coefficient of sliding friction of the sliding friction pair is denoted as to the equivalent friction system of tested rolling bearing of the present invention Number.Equlvalent coefficient of friction of the present invention has objectively responded the manufacture quality and clean-up performance of tested rolling bearing, belongs to tested rolling The inherent characteristic of dynamic bearing.There is rolling bearing equlvalent coefficient of friction measuring device of the present invention fast precise measurement rolling bearing to work as Measure the ability of coefficient of friction.
In order to solve the above-mentioned technical problem, the present invention proposes a kind of rolling bearing equlvalent coefficient of friction measuring device, the survey Measuring device includes fuselage, air-floating main shaft component, mandrel, slide unit, speed probe, data acquisition/processing/calculating/display system; The air-floating main shaft component includes air-floating main shaft matrix and air-floating main shaft;The air-floating main shaft matrix and the fuselage are connected, institute The one end for stating mandrel is connect with the air-floating main shaft by cone match or shaft coupling;The other end of the mandrel and the cunning Tested rolling bearing mounting structure is equipped between platform;The tested rolling bearing mounting structure has following two different knots Structure:
Structure first is that: the tested rolling bearing mounting structure include be arranged in the mandrel end for installing quilt The shaft shoulder of the inner ring of rolling bearing is surveyed, the bearing block of the outer ring for installing tested rolling bearing, institute are fixed on the slide unit It states bearing block and is equipped with the inner cylinder face and outer ring shoulder block cooperated with the external cylindrical surface of the outer ring of the tested rolling bearing, it is described interior Cylindrical surface and the air-floating main shaft are coaxial;Components including the air-floating main shaft component, mandrel and tested rolling bearing The rotary axis system of measuring device of the present invention is together constituted, the movement parts on the rotary axis system include the air-floating main shaft, core Axis, the inner ring of tested rolling bearing, the rolling element of tested rolling bearing and the retainer of tested rolling bearing;
Structure second is that: the tested rolling bearing mounting structure includes the use being fixed at the shaft shoulder of the mandrel end Bearing block in the outer ring for installing tested rolling bearing, the bearing block are equipped with the outer circle with the outer ring of the tested rolling bearing The inner cylinder face and outer ring shoulder block of cylinder cooperation;The load of the inner ring for installing tested rolling bearing is fixed on the slide unit Axis, the loading axis are equipped with the external cylindrical surface and inner ring axis cooperated with the inner cylinder face of the inner ring of the tested rolling bearing Shoulder, the external cylindrical surface and the air-floating main shaft are coaxial;Including the air-floating main shaft component, mandrel, bearing block and tested rolling Components including bearing together constitute the rotary axis system of measuring device of the present invention, and the movement parts on the rotary axis system include The air-floating main shaft, mandrel, bearing block, the outer ring for being tested rolling bearing, the rolling element and the tested axis of rolling for being tested rolling bearing The retainer held;
The axial translation of slide unit air-floating main shaft described in outer power drive lower edge;The speed probe is for monitoring institute State the angular speed of mandrel or air-floating main shaft;Data acquisition/processing/calculating/the display system is for acquiring, handling the revolving speed The angular velocity signal of the mandrel or air-floating main shaft that sensor monitors, and calculate and show that the equivalent of tested rolling bearing rubs Wipe torque and equlvalent coefficient of friction.
In the present invention, the rotary axis system is preferably vertical layout, and the axis of the air-floating main shaft is perpendicular to horizontal plane.
When carrying out equlvalent coefficient of friction measurement using rolling bearing equlvalent coefficient of friction measuring device of the present invention, in the machine Body side is equipped with power device, and the output shaft of the power device is joined by the free end of an arrangement of clutch and the air-floating main shaft Knot or separation, the slide unit side be equipped with axial loading device, measurement method the following steps are included:
Step 1: mandrel one end is connect by cone match or shaft coupling with air-floating main shaft;Mobile Slide will be tested Rolling bearing is mounted in the tested rolling bearing mounting structure between mandrel and slide unit, for the moment using structure, by tested rolling The inner ring of bearing is installed at the shaft shoulder of the other end of mandrel, and the outer ring that the outer ring of tested rolling bearing is installed on bearing block is kept off At shoulder;When using structure two, bearing block is installed at the shaft shoulder of the other end of mandrel, the outer ring of tested rolling bearing is installed At the outer ring shoulder block of bearing block, the inner ring of tested rolling bearing is installed at the inner ring shaft shoulder of loading axis;
Step 2: according to the type and size of tested rolling bearing, by Frictional Moment for Rolling Bearings specifications of surveys such as China People's republic's standard GB/T/T32562-2016 " Frictional Moment for Rolling Bearings measurement method ", the axial loading device are logical It crosses slide unit, bearing block and applies defined axial load to the outer ring of tested rolling bearing;
Step 3: power device drives air-floating main shaft revolution, for the moment using structure, air bearing master by the arrangement of clutch The inner ring of axis, mandrel and tested rolling bearing keeps synchronous revolving;When using structure two, air-floating main shaft, mandrel and tested rolling The outer ring of bearing keeps synchronous revolving;Data acquisition/processing/calculating/display system acquisition, core of the processing from speed probe The angular speed of mandrel is calculated and be shown in the angular velocity signal of axis or air-floating main shaft;
Step 4: the rotational speed of air-floating main shaft and mandrel is gradually increased to given value, after the speed of service is stablized, clutch dress Set the output shaft and air-floating main shaft of separation power device, the friction of the rotational speed of air-floating main shaft and mandrel in tested rolling bearing Gradually until air-floating main shaft and mandrel stop revolution, data acquisition/processing/calculating/display system is obtained for decaying under power consumption effect Mandrel angular speed-time numerical relation;
Step 5: data acquisition/processing/calculating/display system calculates the movement velocity of all movement parts on rotary axis system And kinetic energy, obtain rotary axis system total kinetic energy-time numerical relation;To the numerical relation derivation of rotary axis system total kinetic energy-time, Rotary axis system total kinetic energy-time numerical relation is at a time the attenuating speed of rotary axis system total kinetic energy to the derivative of time Rate is also the friction horsepower under tested rolling bearing angular speed corresponding to the moment;The friction horsepower of tested rolling bearing The quotient obtained divided by the magnitude of angular velocity is tested equivalent friction torque of the rolling bearing under the angular speed, is tested rolling bearing Equivalent friction torque divided by virtual sliding bearing corresponding with tested rolling bearing the face that is slidably matched central radius R and cunning The quotient that the product of normal direction load at dynamic mating surface obtains is tested equlvalent coefficient of friction of the rolling bearing under the angular speed; Normal direction load at the face that is slidably matched is equivalent to axial load that corresponding tested rolling bearing is born in the sliding Normal component at mating surface;When the angular speed of air-floating main shaft and mandrel goes to zero, corresponding equivalent friction torque and work as Amount coefficient of friction is equivalent to the starting equivalent friction torque and starting equlvalent coefficient of friction of tested rolling bearing.
Compared with prior art, the beneficial effects of the present invention are:
On the one hand, the angular velocity measurement precision of speed probe is much higher than conventional rolling bearing measurement of friction torque device institute The measurement accuracy of the micro- power or micro- moment sensor that use;On the other hand, all movement parts tool on rotary axis system is well-regulated Geometry, the size of known high precision and quality, specific motion mode and accurate movement velocity, thus rotating shaft It is that total kinetic energy has very high computational accuracy.Therefore the equivalent friction torque of tested rolling bearing and equlvalent coefficient of friction all have High measurement and computational accuracy.
Further, the present invention can also be by increasing the quality of the movement parts on rotary axis system to promote rotary axis system Initial kinetic energy, the die-away time for extending rotary axis system angular speed, further increase the measurement accuracy of rotary axis system angular speed, in turn Improve the equivalent friction torque of tested rolling bearing and the measurement and computational accuracy of equlvalent coefficient of friction.
Detailed description of the invention
Fig. 1-1 is the structural schematic diagram of tested angular contact ball bearing;
Fig. 1-2 is virtual sliding bearing schematic diagram corresponding with angular contact ball bearing is tested shown in Fig. 1-1;
Fig. 2-1 is the structural schematic diagram of tested thrust ball bearing;
Fig. 2-2 is virtual sliding bearing schematic diagram corresponding with thrust ball bearing is tested shown in Fig. 2-1;
Fig. 3-1 is the structural schematic diagram of tested single-row tapered roller bearing;
Fig. 3-2 is virtual sliding bearing schematic diagram corresponding with single-row tapered roller bearing is tested shown in Fig. 3-1;
Fig. 4 is the signal of the first technical solution partial structurtes and measuring principle of rolling bearing equlvalent coefficient of friction measuring device Figure;
Fig. 5 is the signal of the second technical solution partial structurtes and measuring principle of rolling bearing equlvalent coefficient of friction measuring device Figure.
In figure:
1- inner ring;
The outer ring 2-;
3- rolling element;
The inner ring of the virtual sliding bearing of 4-;
The outer ring of the virtual sliding bearing of 5-;
6- is slidably matched face;
7- fuselage;
8- air-floating main shaft matrix;
9- air-floating main shaft;
10- mandrel;
The 11- shaft shoulder;
12- slide unit;
13- bearing block;
14- inner cylinder face
The outer ring 15- shoulder block;
16- loading axis;
17- external cylindrical surface
The 18- inner ring shaft shoulder;
R- is slidably matched the central radius in face;
α-is tested the contact angle of rolling bearing.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.It is by reference to the embodiment that attached drawing describes Illustratively, it is intended to be used to explain the present invention, and be not considered as limiting the invention.In addition, remembering in following implementation Size, material, shape and its relative configuration of the constituent part of load etc. will not be of the invention such as without special specific record Range is only limitted to this.
Rolling bearing in the present invention includes angular contact ball bearing, thrust ball bearing and single-row tapered roller bearing, Fig. 1-1 The structure of angular contact ball bearing is shown, Fig. 2-1 shows the structure of thrust ball bearing, and Fig. 3-1 shows single-row tapered roller The structure of bearing.In the present invention, tested rolling bearing is abstracted as to a contact angle is constant, the face 6 that is slidably matched is excessively tested rolls The virtual sliding bearing at the center of the rolling element 3 of bearing, i.e., the described virtual sliding bearing are a contact angle and the tested axis of rolling Undertaking feeler α is equal, the virtual sliding bearing at the center of the rolling element 3 of the excessively tested rolling bearing in the face 6 that is slidably matched, with Fig. 1- It is as shown in Figs. 1-2 that the corresponding virtual sliding bearing of angular contact ball bearing is tested shown in 1, with tested thrust ball shown in Fig. 2-1 The corresponding virtual sliding bearing of bearing is as shown in Fig. 2-2, virtual cunning corresponding with single-row tapered roller bearing is tested shown in Fig. 3-1 As shown in figure 3-2, the inner ring 4 of the virtual sliding bearing and the outer ring 5 of virtual sliding bearing are at the face of being slidably matched 6 for dynamic bearing Form sliding friction pair.The virtual sliding bearing is under Test Cycle identical with corresponding tested rolling bearing, institute The friction power loss for stating sliding friction pair is equivalent to the friction power loss of tested rolling bearing, the friction horsepower etc. of the sliding friction pair In the product of the revolution angular speed of the sliding friction torque and virtual sliding bearing of the sliding friction pair, the sliding rubs Wipe secondary sliding friction torque be equal to the central radius R in the face that is slidably matched, the normal direction load at the face 6 that is slidably matched and The product of the coefficient of friction of the sliding friction pair.The sliding friction torque of the sliding friction pair is denoted as of the present invention The coefficient of sliding friction of the sliding friction pair is denoted as of the present invention tested by the equivalent friction torque of tested rolling bearing The equlvalent coefficient of friction of rolling bearing.
Fig. 4 shows a kind of the first technical solution of rolling bearing equlvalent coefficient of friction measuring device proposed by the present invention, The measuring device includes that fuselage 7, air-floating main shaft component, mandrel 10, slide unit 12, bearing block 13, speed probe (are not drawn in figure Out) and data acquisition/processing/calculating/display system (being not drawn into figure).
The air-floating main shaft component includes air-floating main shaft matrix 8 and air-floating main shaft 9;The air-floating main shaft matrix 8 with it is described Fuselage 7 is connected, and the air-floating main shaft connecting pin of the mandrel 10, which is connect by cone match with the air-floating main shaft 9, (or passes through connection Axis device is connect with the air-floating main shaft 9), to guarantee that the air-floating main shaft 9 and mandrel 10 coaxially and without loss transmit torque, axis To load and rotary motion.Tested rolling bearing mounting structure is equipped between the other end and the slide unit of the mandrel 10;Institute Stating tested rolling bearing mounting structure includes the inner ring 1 for being used to install tested rolling bearing that 10 end of mandrel is arranged in The shaft shoulder 11, the bearing block 13 of the outer ring 2 for installing tested rolling bearing, the bearing block 13 are fixed on the slide unit 12 The inner cylinder face 14 and outer ring shoulder block 15 of external cylindrical surface cooperation equipped with the outer ring 2 with the tested rolling bearing, the inner circle Cylinder 14 and the air-floating main shaft 9 are coaxial;The slide unit 12 (can not drawn under the driving of external force and in guiding parts in figure The axial translation of air-floating main shaft 9 described in guidance lower edge out);Including the air-floating main shaft component, mandrel 10 and the tested axis of rolling Components including holding together constitute the rotary axis system of measuring device of the present invention, and the movement parts on the rotary axis system include institute State air-floating main shaft 9, mandrel 10, the inner ring 1 of tested rolling bearing, the rolling element 3 of tested rolling bearing and tested rolling bearing Retainer (is not drawn into) in figure;If the mandrel 10 is connect by shaft coupling with the air-floating main shaft 9, the rotary axis system It further include the shaft coupling, the movement parts on the rotary axis system further include the shaft coupling;The speed probe is for supervising Survey the angular speed of the mandrel 10 or air-floating main shaft 9;Data acquisition/processing/calculating/the display system is for acquiring, handling The angular velocity signal of the mandrel 10 or air-floating main shaft 9 that the speed probe monitors calculates working as tested rolling bearing Moment of friction and equlvalent coefficient of friction are measured, and shows relevant information.
There is also the second technical solutions for rolling bearing equlvalent coefficient of friction measuring device of the present invention, with above-mentioned first technical side Case is different in the tested rolling bearing installation knot being equipped between the other end and the slide unit of the mandrel 10 therein Structure is different.
Fig. 5 shows the second technical solution of rolling bearing equlvalent coefficient of friction measuring device of the present invention, the measuring device It is adopted including fuselage 7, air-floating main shaft component, mandrel 10, slide unit 12, bearing block 13, speed probe (being not drawn into figure) and data Collection/processing/calculating/display system (being not drawn into figure).
The air-floating main shaft component includes air-floating main shaft matrix 8 and air-floating main shaft 9;The air-floating main shaft matrix 8 with it is described Fuselage 7 is connected, and the air-floating main shaft connecting pin of the mandrel 10, which is connect by cone match with the air-floating main shaft 9, (or passes through connection Axis device is connect with the air-floating main shaft 9), to guarantee that the air-floating main shaft 9 and mandrel 10 coaxially and without loss transmit torque, axis To load and rotary motion.Tested rolling bearing installation knot is equipped between the other end and the slide unit of the mandrel 10 Structure, the mounting structure include the outer ring for being used to install tested rolling bearing being fixed at the shaft shoulder 11 of 10 end of mandrel 2 bearing block 13, the bearing block 13 are equipped with the inner cylinder face cooperated with the external cylindrical surface of the outer ring 2 of the tested rolling bearing 14 and outer ring shoulder block 15;The loading axis 16 of the inner ring 1 for installing tested rolling bearing is fixed on the slide unit 12, it is described to add It carries axis 16 and is equipped with the external cylindrical surface 17 and the inner ring shaft shoulder 18 cooperated with the inner cylinder face of the inner ring 1 of the tested rolling bearing, The external cylindrical surface 17 and the air-floating main shaft 9 are coaxial;The slide unit 12 can be under the driving of external force and in guiding parts (figure In be not drawn into) guidance lower edge described in air-floating main shaft 9 axial translation.Including the air-floating main shaft component, mandrel 10, bearing block 13 and tested rolling bearing including components together constitute the rotary axis system of measuring device of the present invention, on the rotary axis system Movement parts include the air-floating main shaft 9, mandrel 10, bearing block 13, tested rolling bearing rolling element 3 and tested rolling bearing 2 retainer of outer ring (being not drawn into figure);It is described if the mandrel 10 is connect by shaft coupling with the air-floating main shaft 9 It further includes the shaft coupling that rotary axis system, which further includes the shaft coupling, the movement parts on the rotary axis system,;The revolution speed sensing Device is used to monitor the angular speed of the mandrel 10 or air-floating main shaft 9;Data acquisition/processing/calculating/the display system is for adopting Collect, handle the angular velocity signal of the mandrel 10 or air-floating main shaft 9 that the speed probe monitors, and calculates and show quilt Survey the equivalent friction torque and equlvalent coefficient of friction of rolling bearing.
Either the first technical solution or the second technical solution, rotary axis system therein are preferably all vertical in the present invention Layout, the axis of the air-floating main shaft 9 is perpendicular to horizontal plane.
When carrying out equlvalent coefficient of friction measurement using rolling bearing equlvalent coefficient of friction measuring device of the present invention, in the machine 7 side of body is equipped with power device, and the output shaft of the power device passes through the free end of an arrangement of clutch and the air-floating main shaft 9 It is coupled or separates, is equipped with axial loading device in 12 side of slide unit.Above-mentioned power device, arrangement of clutch and axially loaded dress It sets and belongs to general knowledge known in this field with the position of related components in measuring device of the present invention and connection relationship, therefore do not exist It is drawn in figure.
The working principle of rolling bearing equlvalent coefficient of friction measuring device of the present invention are as follows: add in the axial direction of the first technical solution Carry and set through slide unit 12, bearing block 13 to the outer ring of tested rolling bearing 2, as shown in Fig. 2, or the second technical solution axis It is axially born to the inner ring 1 of tested rolling bearing as shown in figure 3, application is defined to loading device by slide unit 12, loading axis 16 Under the conditions of lotus, power device drives air-floating main shaft 9 to turn round by arrangement of clutch, returns back to air-floating main shaft 9 and mandrel 10 given Revolution angular speed after arrangement of clutch separation power device output shaft and air-floating main shaft 9, the revolution of mandrel 10 or air-floating main shaft 9 Speed gradually decays under the friction power loss effect of tested rolling bearing until air-floating main shaft 9 and mandrel 10 stop revolution;Data Acquisition/processing/calculating/display system obtains " mandrel angular speed-time " numerical relation, calculates all movement parts on rotary axis system Movement velocity and kinetic energy, obtain " rotary axis system total kinetic energy-time " numerical relation;To " rotary axis system total kinetic energy-time " number Value relationship derivation, " rotary axis system total kinetic energy-time " numerical relation is at a time that rotary axis system is total to the derivative of time The attenuating rate of kinetic energy is also the friction horsepower under tested rolling bearing angular speed corresponding to the moment, is also equivalent to pair The friction horsepower of the sliding friction pair for the virtual sliding bearing answered;The friction horsepower of sliding friction pair is obtained divided by the magnitude of angular velocity Quotient be moment of friction of the sliding friction pair under the angular speed, be also equivalent to tested rolling bearing working as under the angular speed Measure moment of friction;Moment of friction of the sliding friction pair under the angular speed is matched divided by the central radius R in the face of being slidably matched with sliding The quotient that the product of the normal direction load at conjunction face place obtains is coefficient of friction of the sliding friction pair under the angular speed, be also equivalent to by Survey equlvalent coefficient of friction of the rolling bearing under the angular speed;Normal direction load at the face 6 that is slidably matched is equivalent to corresponding Normal component of the axial load that tested rolling bearing is born at the face 6 that is slidably matched;When air-floating main shaft 9 and mandrel 10 Angular speed when going to zero, the starting that corresponding equivalent friction torque and equlvalent coefficient of friction are equivalent to tested rolling bearing works as Measure moment of friction and starting equlvalent coefficient of friction.
Corresponding to the first technical solution of rolling bearing equlvalent coefficient of friction measuring device of the present invention, the present invention proposes simultaneously A kind of rolling bearing equlvalent coefficient of friction measurement method, the measurement method the following steps are included:
Step 1: one end of mandrel 10 is connect by cone match with air-floating main shaft 9 (or by shaft coupling and air bearing master Axis 9 connects);The inner ring 1 of tested rolling bearing is installed at the shaft shoulder 11 of the other end of mandrel;Mobile Slide 12 will be tested The outer ring 2 of rolling bearing is installed at the outer ring shoulder block 15 of bearing block;
Step 2: according to the type and size of tested rolling bearing, by Frictional Moment for Rolling Bearings specifications of surveys such as China People's republic's standard GB/T/T32562-2016 " Frictional Moment for Rolling Bearings measurement method ", axial loading device passes through cunning Platform 12, bearing block 13 apply defined axial load to the outer ring of tested rolling bearing 2;
Step 3: power device drives air-floating main shaft 9 to turn round by arrangement of clutch, air-floating main shaft 9, mandrel 10 and tested rolling The inner ring 1 of dynamic bearing keeps synchronous revolving;Data acquisition/processing/calculating/display system acquisition, processing come from speed probe Mandrel 10 or air-floating main shaft 9 angular velocity signal, calculate the angular speed of mandrel 10, and show relevant information;
Step 4: the rotational speed of air-floating main shaft 9 and mandrel 10 is gradually increased to given value and stable operation, arrangement of clutch Separate the output shaft and air-floating main shaft 9 of power device, rotational speed the rubbing in tested rolling bearing of air-floating main shaft 9 and mandrel 10 It wipes and gradually decays under power consumption effect until air-floating main shaft 9 and mandrel 10 stop revolution, data acquisition/processing/calculating/display system Obtain " mandrel angular speed-time " numerical relation;
Step 5: data acquisition/processing/calculating/display system calculates the movement velocity of all movement parts on rotary axis system And kinetic energy, obtain " rotary axis system total kinetic energy-time " numerical relation;To " rotary axis system total kinetic energy-time " numerical relation derivation, " rotary axis system total kinetic energy-time " numerical relation is at a time the attenuating speed of rotary axis system total kinetic energy to the derivative of time Rate is also the friction horsepower under tested rolling bearing angular speed corresponding to the moment;The friction horsepower of tested rolling bearing The quotient obtained divided by the magnitude of angular velocity is tested equivalent friction torque of the rolling bearing under the angular speed, is tested rolling bearing Equivalent friction torque divided by virtual sliding bearing corresponding with tested rolling bearing the face that is slidably matched central radius R and cunning The quotient that the product of normal direction load at dynamic mating surface 6 obtains is tested equivalent friction system of the rolling bearing under the angular speed Number;Normal direction load at the face 6 that is slidably matched is equivalent to axial load that corresponding tested rolling bearing is born described The normal component being slidably matched at face 6;When the angular speed of air-floating main shaft 9 and mandrel 10 goes to zero, corresponding equivalent friction Torque and equlvalent coefficient of friction are equivalent to the starting equivalent friction torque and starting equlvalent coefficient of friction of tested rolling bearing.
Rolling bearing equivalent friction corresponding to the alternative plan of rolling bearing equlvalent coefficient of friction measuring device of the present invention Coefficient measuring method, rolling bearing corresponding to the first scheme with rolling bearing equlvalent coefficient of friction measuring device of the present invention are worked as Not existing together for friction coefficient measurement method of amount is only that:
Step 1: one end of mandrel 10 is connect by cone match with air-floating main shaft 9 (or by shaft coupling and air bearing master Axis 9 connects);Bearing block 13 is installed on to the shaft shoulder 11 of the other end of mandrel;Mobile Slide 12, by the inner ring of tested rolling bearing 1 is installed at the inner ring shaft shoulder 18 of loading axis, and the outer ring 2 of tested rolling bearing is installed at the outer ring shoulder block 15 of bearing block;
Step 2: according to the type and size of tested rolling bearing, by Frictional Moment for Rolling Bearings specifications of surveys such as China People's republic's standard GB/T/T32562-2016 " Frictional Moment for Rolling Bearings measurement method ", axial loading device passes through cunning Platform 12, loading axis 16 apply defined axial load to the inner ring 1 of tested rolling bearing;
Step 3: power device drives air-floating main shaft 9 to turn round by arrangement of clutch, air-floating main shaft 9, mandrel 10 and tested rolling The outer ring 2 of dynamic bearing keeps synchronous revolving;Data acquisition/processing/calculating/display system acquisition, processing come from speed probe Mandrel 10 or air-floating main shaft 9 angular velocity signal, calculate the angular speed of mandrel 10, and show relevant information;
Step 4 and step 5 are the same as the first above-mentioned technical solution.

Claims (8)

1. a kind of rolling bearing equlvalent coefficient of friction measuring device, which is characterized in that including fuselage (7), air-floating main shaft component, core Axis (10), slide unit (12), speed probe, data acquisition/processing/calculating/display system;
The air-floating main shaft component includes air-floating main shaft matrix (8) and air-floating main shaft (9);The air-floating main shaft matrix (8) and institute It states fuselage (7) to be connected, one end of the mandrel (10) is connect with the air-floating main shaft (9) by cone match or shaft coupling;
Tested rolling bearing mounting structure is equipped between the other end and the slide unit of the mandrel (10);
The tested rolling bearing mounting structure includes that setting is used to install the tested axis of rolling in the mandrel (10) end The shaft shoulder (11) of the inner ring (1) held is fixed with the bearing of the outer ring (2) for installing tested rolling bearing on the slide unit (12) Seat (13), the bearing block (13) are equipped with the inner cylinder face cooperated with the external cylindrical surface of the outer ring (2) of the tested rolling bearing (14) and outer ring shoulder block (16), the inner cylinder face (14) and the air-floating main shaft (9) are coaxial;The slide unit (12) is driven in external force The axial translation of air-floating main shaft (9) described in dynamic lower edge;
The speed probe is used to monitor the angular speed of the mandrel (10) or air-floating main shaft (9);Data acquisition/the place Reason/calculating/display system is for acquiring, handling the mandrel (10) or air-floating main shaft (9) that the speed probe monitors Angular velocity signal, and calculate and show the equivalent friction torque and equlvalent coefficient of friction of tested rolling bearing.
2. rolling bearing equlvalent coefficient of friction measuring device according to claim 1, which is characterized in that the air-floating main shaft It (9) is vertical layout, the axis of the air-floating main shaft (9) is perpendicular to horizontal plane.
3. a kind of rolling bearing equlvalent coefficient of friction measurement method, which is characterized in that using rolling as claimed in claim 1 or 2 Bearing equlvalent coefficient of friction measuring device, and power device, the output shaft of the power device are equipped in the fuselage (7) side It is coupled or separates with the free end of the air-floating main shaft (9) by an arrangement of clutch, is equipped in the slide unit (12) side axial Loading device, the components including the air-floating main shaft component, mandrel (10), bearing block (13) and tested rolling bearing are total With the rotary axis system for constituting the rolling bearing equlvalent coefficient of friction measuring device, the movement parts on the rotary axis system include institute State air-floating main shaft (9), mandrel (10), the inner ring (1) of tested rolling bearing, the rolling element (3) of tested rolling bearing and tested rolling The retainer of dynamic bearing;The measurement method the following steps are included:
Step 1: one end of mandrel (10) is connect by cone match or shaft coupling with air-floating main shaft (9);By tested rolling The inner ring (1) of bearing is installed at the shaft shoulder (11) of the other end of mandrel (10);Mobile Slide (12), by tested rolling bearing Outer ring (2) is installed at the outer ring shoulder block (16) of bearing block (13);
Step 2:, by Frictional Moment for Rolling Bearings specifications of surveys, the axial direction adds according to the type and size of tested rolling bearing It carries to set and defined axial load is applied to the outer ring (2) of tested rolling bearing by slide unit (12), bearing block (13);
Step 3: power device by arrangement of clutch driving air-floating main shaft (9) turn round, air-floating main shaft (9), mandrel (10) and be tested The inner ring (1) of rolling bearing keeps synchronous revolving;Data acquisition/processing/calculating/display system acquisition, processing are passed from revolving speed The mandrel (10) of sensor or the angular velocity signal of air-floating main shaft (9), are calculated and be shown the angular speed of mandrel (10);
Step 4: the rotational speed of air-floating main shaft (9) and mandrel (10) is gradually increased to given value, after the speed of service is stablized, from It attaches together and sets the output shaft for separating power device and air-floating main shaft (9), the rotational speed of air-floating main shaft (9) and mandrel (10) is tested Gradually decay under the friction power loss effect of rolling bearing until air-floating main shaft (9) and mandrel (10) stop revolution, data acquisition/place Reason/calculating/display system obtains mandrel angular speed-time numerical relation;
Step 5: data acquisition/processing/calculating/display system calculates the movement velocity of all movement parts on rotary axis system and moves Can, obtain rotary axis system total kinetic energy-time numerical relation;To the numerical relation derivation of rotary axis system total kinetic energy-time, revolution Shafting total kinetic energy-time numerical relation is at a time the attenuating rate of rotary axis system total kinetic energy to the derivative of time, It also is the friction horsepower under tested rolling bearing angular speed corresponding to the moment;The friction horsepower of tested rolling bearing divided by The quotient that the magnitude of angular velocity obtains is tested equivalent friction torque of the rolling bearing under the angular speed, and tested rolling bearing is worked as Amount moment of friction is matched divided by the central radius R in the face that is slidably matched of virtual sliding bearing corresponding with tested rolling bearing with sliding The quotient that the product of normal direction load at conjunction face (6) obtains is tested equlvalent coefficient of friction of the rolling bearing under the angular speed; Normal direction load at the face that is slidably matched (6) is equivalent to axial load that corresponding tested rolling bearing is born in the cunning Normal component at dynamic mating surface (6);
When the angular speed of air-floating main shaft (9) and mandrel (10) goes to zero, corresponding equivalent friction torque and equivalent friction system Number is equivalent to the starting equivalent friction torque and starting equlvalent coefficient of friction of tested rolling bearing.
4. rolling bearing equlvalent coefficient of friction measurement method according to claim 3, which is characterized in that the virtual sliding axle Hold is that a contact angle is equal with tested rolling bearing contact angle α, rolling element of the face that is slidably matched (6) excessively tested rolling bearing (3) the virtual sliding bearing at center, the inner ring (4) of the virtual sliding bearing and the outer ring (5) of virtual sliding bearing exist It is slidably matched at face (6) and forms sliding friction pair;The virtual sliding bearing is in identical as corresponding tested rolling bearing Test Cycle under, the friction power loss of the sliding friction pair is equivalent to the friction power loss of tested rolling bearing, and the sliding rubs It wipes secondary friction horsepower and is equal to the sliding friction torque of the sliding friction pair and the revolution angular speed of the virtual sliding bearing Product, the sliding friction torque of the sliding friction pair is equal to the central radius R in the face that is slidably matched, described is slidably matched The product of the coefficient of friction of normal direction load and the sliding friction pair at face (6);By the sliding friction of the sliding friction pair Torque is denoted as the equivalent friction torque of corresponding tested rolling bearing, and the coefficient of sliding friction of the sliding friction pair is denoted as correspondence The equlvalent coefficient of friction of tested rolling bearing.
5. a kind of rolling bearing equlvalent coefficient of friction measuring device, which is characterized in that including fuselage (7), air-floating main shaft component, core Axis (10), slide unit (12), speed probe, data acquisition/processing/calculating/display system;
The air-floating main shaft component includes air-floating main shaft matrix (8) and air-floating main shaft (9);The air-floating main shaft matrix (8) and institute It states fuselage (7) to be connected, one end of the mandrel (10) is connect with the air-floating main shaft (9) by cone match or shaft coupling;
Tested rolling bearing mounting structure is equipped between the other end and the slide unit of the mandrel (10);
The tested rolling bearing mounting structure includes being arranged at the shaft shoulder (11) of mandrel (10) end for installing quilt The bearing block (13) of the outer ring (2) of rolling bearing is surveyed, the bearing block (13) is equipped with the outer ring (2) with the tested rolling bearing External cylindrical surface cooperation inner cylinder face (14) and outer ring shoulder block (16);It is fixed on the slide unit (12) for installing tested rolling The loading axis (16) of the inner ring (1) of dynamic bearing, the loading axis (16) are equipped with and the inner ring (1) of the tested rolling bearing The external cylindrical surface (17) and the inner ring shaft shoulder (18) of inner cylinder face cooperation, the external cylindrical surface (17) and the air-floating main shaft (9) are same Axis;The axial translation of the slide unit (12) air-floating main shaft (9) described in outer power drive lower edge;
The speed probe is used to monitor the angular speed of the mandrel (10) or air-floating main shaft (9);Data acquisition/the place Reason/calculating/display system is for acquiring, handling the mandrel (10) or air-floating main shaft (9) that the speed probe monitors Angular velocity signal, and calculate and show the equivalent friction torque and equlvalent coefficient of friction of tested rolling bearing.
6. rolling bearing equlvalent coefficient of friction measuring device according to claim 5, which is characterized in that the air-floating main shaft It (9) is vertical layout, the axis of the air-floating main shaft (9) is perpendicular to horizontal plane.
7. a kind of rolling bearing equlvalent coefficient of friction measurement method, which is characterized in that using the rolling as described in claim 5 or 6 Bearing equlvalent coefficient of friction measuring device, and power device, the output shaft of the power device are equipped in the fuselage (7) side It is coupled or separates with the free end of the air-floating main shaft (9) by an arrangement of clutch, is equipped in the slide unit (12) side axial Loading device, the components including the air-floating main shaft component, mandrel (10), bearing block (13) and tested rolling bearing are total With the rotary axis system for constituting the rolling bearing equlvalent coefficient of friction measuring device, the movement parts on the rotary axis system include institute State the rolling element of air-floating main shaft (9), mandrel (10), bearing block (13), the outer ring (2) of tested rolling bearing, tested rolling bearing (3) and the retainer of tested rolling bearing;The measurement method the following steps are included:
Step 1: one end of mandrel (10) is connect by cone match or shaft coupling with air-floating main shaft (9);By bearing block (13) it is installed at the shaft shoulder (11) of the other end of mandrel, Mobile Slide (12), the inner ring (1) of tested rolling bearing is installed on At the inner ring shaft shoulder (18) of loading axis (16), the outer ring (2) of tested rolling bearing is installed on to the outer ring shoulder block (16) of bearing block Place;
Step 2:, by Frictional Moment for Rolling Bearings specifications of surveys, the axial direction adds according to the type and size of tested rolling bearing It carries to set and defined axial load is applied to the inner ring (1) of tested rolling bearing by slide unit (12), loading axis (16);
Step 3: power device is turned round by arrangement of clutch driving air-floating main shaft (9), air-floating main shaft (9), mandrel (10), bearing The outer ring (2) of seat (13) and rolling bearing keeps synchronous revolving;Data acquisition/processing/calculating/display system acquisition, processing come From the mandrel (10) of speed probe or the angular velocity signal of air-floating main shaft (9), the angular speed of mandrel (10) is calculated and be shown;
Step 4: the rotational speed of air-floating main shaft (9) and mandrel (10) is gradually increased to given value, after the speed of service is stablized, from It attaches together and sets the output shaft for separating power device and air-floating main shaft (9), the rotational speed of air-floating main shaft (9) and mandrel (10) is tested Gradually decay under the friction power loss effect of rolling bearing until air-floating main shaft (9) and mandrel (10) stop revolution, data acquisition/place Reason/calculating/display system obtains mandrel angular speed-time numerical relation;
Step 5: data acquisition/processing/calculating/display system calculates the movement velocity of all movement parts on rotary axis system and moves Can, obtain rotary axis system total kinetic energy-time numerical relation;To the numerical relation derivation of rotary axis system total kinetic energy-time, revolution Shafting total kinetic energy-time numerical relation is at a time the attenuating rate of rotary axis system total kinetic energy to the derivative of time, It also is the friction horsepower under tested rolling bearing angular speed corresponding to the moment;The friction horsepower of tested rolling bearing divided by The quotient that the magnitude of angular velocity obtains is tested equivalent friction torque of the rolling bearing under the angular speed, and tested rolling bearing is worked as Amount moment of friction is matched divided by the central radius R in the face that is slidably matched of virtual sliding bearing corresponding with tested rolling bearing with sliding The quotient that the product of normal direction load at conjunction face (6) obtains is tested equlvalent coefficient of friction of the rolling bearing under the angular speed; Normal direction load at the face that is slidably matched (6) is equivalent to axial load that corresponding tested rolling bearing is born in the cunning Normal component at dynamic mating surface (6);
When the angular speed of air-floating main shaft (9) and mandrel (10) goes to zero, corresponding equivalent friction torque and equivalent friction system Number is equivalent to the starting equivalent friction torque and starting equlvalent coefficient of friction of tested rolling bearing.
8. rolling bearing equlvalent coefficient of friction measurement method according to claim 7, which is characterized in that the virtual sliding axle Hold is that a contact angle is equal with tested rolling bearing contact angle (α), rolling element of the face that is slidably matched (6) excessively tested rolling bearing (3) the virtual sliding bearing at center, the inner ring (4) of the virtual sliding bearing and the outer ring (5) of virtual sliding bearing exist It is slidably matched at face (6) and forms sliding friction pair;The virtual sliding bearing is in identical as corresponding tested rolling bearing Test Cycle under, the friction power loss of the sliding friction pair is equivalent to the friction power loss of tested rolling bearing, and the sliding rubs It wipes secondary friction horsepower and is equal to the sliding friction torque of the sliding friction pair and the revolution angular speed of the virtual sliding bearing Product, the sliding friction torque of the sliding friction pair is equal to the central radius (R) in the face that is slidably matched, the sliding is matched The product of the coefficient of friction of normal direction load and the sliding friction pair at conjunction face (6);The sliding of the sliding friction pair is rubbed The equivalent friction torque that torque is denoted as corresponding tested rolling bearing is wiped, the coefficient of sliding friction of the sliding friction pair is denoted as pair The equlvalent coefficient of friction of rolling bearing should be tested.
CN201811283092.3A 2018-10-31 2018-10-31 Rolling bearing equlvalent coefficient of friction measuring device and method Pending CN109540516A (en)

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CN201811283092.3A CN109540516A (en) 2018-10-31 2018-10-31 Rolling bearing equlvalent coefficient of friction measuring device and method
PCT/CN2019/113880 WO2020088431A1 (en) 2018-10-31 2019-10-29 Device for measuring equivalent friction coefficient of rolling bearing

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020088431A1 (en) * 2018-10-31 2020-05-07 天津大学 Device for measuring equivalent friction coefficient of rolling bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020088431A1 (en) * 2018-10-31 2020-05-07 天津大学 Device for measuring equivalent friction coefficient of rolling bearing

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