CN104236907B - A kind of Frictional Moment for Rolling Bearings and stiffness measurement device and method - Google Patents

A kind of Frictional Moment for Rolling Bearings and stiffness measurement device and method Download PDF

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Publication number
CN104236907B
CN104236907B CN201410448639.6A CN201410448639A CN104236907B CN 104236907 B CN104236907 B CN 104236907B CN 201410448639 A CN201410448639 A CN 201410448639A CN 104236907 B CN104236907 B CN 104236907B
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bearing
lasso
measured
air
angular contact
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CN104236907A (en
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张进华
洪军
马劭航
李小虎
杨朝晖
吴文武
刘光辉
万少可
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Xi an Jiaotong University
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Xi an Jiaotong University
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Abstract

A kind of Frictional Moment for Rolling Bearings and stiffness measurement device and method, this device includes testing main shaft, rear support assembly, loading belt wheel, front support assembly, laboratory table and the front rack being fixed in laboratory table, miniature beam sensor bracket and tail-bracket etc.;The method comprises the following steps: 1) miniature beam load cell, force transducer and displacement transducer are arranged on respectively on the position of correspondence;2) by loading lasso force, making angular contact ball bearing to be measured realize pretension;3) start dragging electro spindle, drive experiment main shaft to operate under setting speed;4) measurement obtains the moment of friction of angular contact ball bearing to be measured, bearing axial load variable quantity and Internal and external cycle relative displacement;5) the axial load variable quantity recorded, inner ring relative displacement are depicted as bearing rigidity curve, obtain the bearing rigidity of angular contact ball bearing to be measured.The present invention can measure moment of friction and the rigidity of rolling bearing under the influence of different rotating speeds, pretightning force, three factors of load on axle.

Description

A kind of Frictional Moment for Rolling Bearings and stiffness measurement device and method
[technical field]
The invention belongs to field of measuring technique, be specifically related to a kind of Frictional Moment for Rolling Bearings and fill with stiffness measurement Put and method.
[background technology]
Rolling bearing is widely used as the important foundation part of mechanized equipment, the every field in machine-building, It plays a part carrying and transmitting movement in mechanized equipment.Rolling bearing is in rotary course, due to it Outer ring, inner ring, retainer, ball, the contacting with each other of seal member, also exist moment of friction, frictional force The size of square depends not only on the physical dimension of bearing itself, geometric accuracy, material property, also carries with work Lotus, assembly precision, lubricating condition and processing factors etc. are relevant.The size impact of Frictional Moment for Rolling Bearings The caloric value of power consumption and bearing, the temperature rise directly affecting bearing was lost efficacy, and was bearing optimization design In important performance indications.
[summary of the invention]
Present invention aims to the deficiencies in the prior art, it is provided that a kind of Frictional Moment for Rolling Bearings with Stiffness measurement device and method, its can detect a kind of rolling bearing being arranged in axle system different rotating speeds, Under pretightning force and load on axle effect, corresponding moment of friction and rigidity.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions:
A kind of Frictional Moment for Rolling Bearings and stiffness measurement device, including experiment main shaft, rear support assembly, add Carrier band wheel, front support assembly, laboratory table and the front rack being fixed in laboratory table, miniature beam sensor torr Frame and tail-bracket;Wherein, it is respectively arranged at the two ends with a shaft shoulder before and after experiment main shaft;Front support assembly includes setting Put the angular contact ball bearing to be measured at the experiment front-end of spindle shaft shoulder, one end of angular contact ball bearing to be measured and reality Testing the laminating of the front-end of spindle shaft shoulder, its other end is locked by front support locking nut, angular contact ball bearing to be measured Circumference be disposed with loading lasso, air journal bearing and front support bearing block, front support from inside to outside Bearing block is fixed on front rack, and experiment front-end of spindle is additionally provided with for fitting loading lasso, air radially The air thrust bearing of bearing and for sealing the front support drive end bearing bracket of front support bearing block, air thrust bearing End face on circumference some offers compressed-air actuated air thrust bearing pore, air radial axle are provided The circumference held is evenly arranged with some in order to provide compressed-air actuated air journal bearing pore, loads lasso Being circumferentially provided with one and load lasso boss, some force transducers circumference is uniformly arranged on the rib loading lasso In, and with angular contact ball bearing outer ring end contact to be measured, before some displacement transducer circumferences are uniformly arranged on On supporting drive end bearing bracket;Rear support assembly includes being arranged on the angular contact ball bearing at the experiment rear-end of spindle shaft shoulder, One end of angular contact ball bearing and experiment rear-end of spindle shaft shoulder laminating, its other end passes through rear support locking nut Locking, angular contact ball bearing be circumferentially provided with rear trunnion bearing, rear trunnion bearing is fixed on tail-bracket On, before and after rear trunnion bearing, two ends are sealed by rear support drive end bearing bracket and rear support rear end cap;Miniature beam LOAD CELLS is arranged on miniature beam sensor bracket, and it is passed by flexible thin wire and is opened in front support bearing The through hole of seat circumference is connected with loading lasso boss;Load belt wheel and be arranged on the middle part of experiment main shaft.
The present invention further improvement is that: loads lasso and uses interference fit to be arranged on angular contact ball bearing to be measured Outer ring.
The present invention further improvement is that: load lasso boss be positioned at load lasso) rear portion circumference minimum point Position so that the measurement end of miniature beam load cell is tangentially connected with loading lasso.
The present invention further improvement is that: on the end face of air thrust bearing, circumference is evenly arranged with six offers Compressed-air actuated air thrust bearing pore.
The present invention further improvement is that: the circumference of air journal bearing is evenly arranged with four row in order to provide pressure The air journal bearing pore of contracting air, in each column, each circumference is evenly arranged with six air journal bearing pores.
The present invention further improvement is that: the quantity of force transducer is three, and its wire is by loading on lasso Wire casing draw.
A kind of Frictional Moment for Rolling Bearings and the measuring method of stiffness measurement device, comprise the following steps:
1) sensor is installed: be arranged on by miniature beam load cell on miniature beam sensor bracket, flexible thin Line one end connects the gauge head of miniature beam load cell, and its other end is through through hole glue on front support bearing block It is bonded on the loading lasso boss loading lasso circumference;Some force transducer circumferences are uniformly arranged on loading set In circle rib, and contact with the cycle surface of angular contact ball bearing to be measured;By some displacement transducers circumference all In the even installing hole being arranged on front support drive end bearing bracket, and ensure that the gauge head of displacement transducer is protected with loading lasso Hold setpoint distance;
2) open air supply system, check air thrust bearing and air journal bearing supply loop works state; Regulation supply gas pressure, makes to form stable air film between air journal bearing and loading lasso;Air thrust shaft Hold to loading lasso applying thrust, and pass to angular contact ball bearing outer ring to be measured by loading lasso, make to treat Angle measurement contact ball bearing realizes pretension;
3) start dragging electro spindle, drive experiment main shaft to operate under setting speed;
4) respectively obtained treated angle measurement by miniature beam load cell, some force transducers, some displacement transducers Moment of friction M of contact ball bearing, bearing axial load variation delta F and Internal and external cycle relative displacement Δ x;
5) moment of friction M, axial load under the conditions of the angular contact ball bearing different operating to be measured that will record become Change amount Δ F, Internal and external cycle relative displacement Δ x record;By axial load variation delta F recorded, inner ring phase Displacement x is depicted as bearing rigidity curve, obtains the bearing rigidity of angular contact ball bearing to be measured.
8, a kind of Frictional Moment for Rolling Bearings according to claim 7 and the measurement side of stiffness measurement device Method, it is characterised in that further comprising the steps of:
6) after a DATA REASONING completes, by only changing the rotating speed of angular contact ball bearing to be measured, regulation air Thrust bearing apply load change angular contact ball bearing to be measured born pretightning force, by loaded ribbon wheel regulation It is applied to test the load on main shaft, obtains angular contact ball bearing to be measured frictional force under various operating conditions Square and stiffness measurement data.
Compared with prior art, the present invention has the following technical effect that:
One Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device and method, the method can be measured and turn The moment of friction of rolling bearing and rigidity under the influence of speed, pretightning force, three factors of load on axle;In this device Utilize air bearing to realize contactless loading and support can ensure that angular contact ball bearing to be measured can freely be transported Dynamic and unfettered so that measured data are more nearly the practical situation of bearing movable.
[accompanying drawing explanation]
Fig. 1 is the axonometric chart of a kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device;
Fig. 2 a is that a kind of Frictional Moment for Rolling Bearings of the present invention removes the one after laboratory table with stiffness measurement device The front view of state, Fig. 2 b is that the A-A of Fig. 2 a is to sectional view;
Fig. 3 a is a kind of Frictional Moment for Rolling Bearings of the present invention remove after laboratory table with stiffness measurement device another The front view of the state of kind, Fig. 3 b is that the B-B of Fig. 3 a is to sectional view;
Fig. 4 is the structural representation of air thrust bearing of the present invention;
Fig. 5 is the structural representation of air journal bearing of the present invention;
Fig. 6 is force transducer installation site figure of the present invention.
Wherein: 1, experiment main shaft;2, rear support assembly;3, belt wheel is loaded;4, front support assembly;5、 Laboratory table;6, front rack;7, miniature beam load cell;8, miniature beam sensor bracket;9, butt Frame;10, rear support rear end cap;11, rear support locking nut;12, rear trunnion bearing;13, corner connection Touch ball bearing;14, rear support drive end bearing bracket;15, air thrust bearing;16, front support bearing block;17、 Air journal bearing;18, front support drive end bearing bracket;19, front support locking nut;20, angular contact ball to be measured Bearing;21, lasso is loaded;22, force transducer;23, displacement transducer;151, air thrust bearing gas Hole;171, air journal bearing pore;211, lasso boss is loaded.
[detailed description of the invention]
Below in conjunction with the accompanying drawings the present invention is described in further detail.
Seeing Fig. 1 to Fig. 6, one Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device, including experiment Main shaft 1, rear support assembly 2, load belt wheel 3, front support assembly 4, laboratory table 5 and be fixed on experiment Front rack 6 on platform 5, miniature beam sensor bracket 8 and tail-bracket 9;Wherein, before and after experiment main shaft 1 It is respectively arranged at the two ends with a shaft shoulder;It is to be measured that front support assembly 4 includes being arranged at the shaft shoulder of experiment main shaft 1 front end Angular contact ball bearing 20, one end of angular contact ball bearing 20 to be measured and the shaft shoulder laminating of experiment main shaft 1 front end, its The other end is locked by front support locking nut 19, and the circumference of angular contact ball bearing 20 to be measured depends on from inside to outside Secondary being provided with loads lasso 21, air journal bearing 17 and front support bearing block 16, front support bearing block 16 Be bolted on front rack 6, experiment main shaft 1 front end be additionally provided with for fit loading lasso 21, The air thrust bearing 15 of air journal bearing 17 and for sealing the front support front end of front support bearing block 16 Lid 18, air journal bearing 17 and air thrust bearing 15 are as loading and support means, air thrust shaft Hold circumference on the end face of 15 and some offers compressed-air actuated air thrust bearing pore 151 is provided, empty The circumference of gas journal bearing 17 is evenly arranged with some in order to provide compressed-air actuated air journal bearing pore 171, load lasso 21 is circumferentially provided with a loading lasso boss 211, some force transducers 22 circumference Uniformly it is arranged in the rib loading lasso 21, and contacts with angular contact ball bearing 20 cycle surface to be measured, Some displacement transducer 23 circumferences are uniformly arranged on front support drive end bearing bracket 18;Rear support assembly 2 includes setting Put the angular contact ball bearing 13 at the shaft shoulder of experiment main shaft 1 rear end, one end of angular contact ball bearing 13 and experiment The shaft shoulder laminating of main shaft 1 rear end, its other end passes through rear support locking nut 11 and locks, angular contact ball bearing 13 Be circumferentially provided with rear trunnion bearing 12, rear trunnion bearing 12 is bolted on tail-bracket 9, Before and after rear trunnion bearing 12, two ends are sealed by rear support drive end bearing bracket 14 and rear support rear end cap 10;Micro- Type beam load cell 7 is arranged on miniature beam sensor bracket 8, and it is propped up before being opened in by flexible thin wire The through hole holding bearing block 16 circumference is connected with loading lasso boss 211;Load belt wheel 3 and be arranged on experiment master The middle part of axle 1, can be to experiment main shaft 1 imposed load.
Wherein, load lasso 21 and use interference fit to be arranged on the outer ring of angular contact ball bearing 20 to be measured, with Ensure to keep consistent with the motion of the outer ring of angular contact ball bearing 20 to be measured.
Further, load lasso boss 211 and be positioned at the rear portion circumference lowest point loading lasso 21, make The measurement end obtaining miniature beam load cell 7 is tangentially connected with loading lasso 21, and the power of measurement is passed to power Sensor 22.The position holding measured end with load lasso boss 211 of the most miniature beam load cell 7 is flat OK, and highly with the height and position loading lasso boss 211 keep consistent.
Further, on the end face of air thrust bearing 15 circumference to be evenly arranged with six offers compressed-air actuated Air thrust bearing pore 151, thus on angular contact ball bearing 20 to be measured, apply pretightning force.Air is radially The circumference of bearing 17 is evenly arranged with four row in order to provide compressed-air actuated air journal bearing pore 171, often On row, each circumference is evenly arranged with six air journal bearing pores 171 so that air journal bearing 17 with Load lasso 21 and between formed air film, thus for experiment main shaft provide back support.Force transducer 22 Quantity is three, and its wire is drawn by loading the wire casing on lasso 21.
In order to the present invention is further appreciated that, now its structure is described in further details.
One Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device, including experiment main shaft 1, rolling bearing The miniature beam load cell 7 of the moment of friction of rigidity detection device and measurement rolling bearing;Experiment main shaft 1 leads to Cross front rack 6 and tail-bracket 9 is arranged in laboratory table 5;The rear end of experiment main shaft 1 and dragging electro spindle Front end uses shaft coupling to connect and ensures coaxial.Experiment main shaft 1, is tested as supporting by former and later two supportings Loading belt wheel 3 for loading force is installed in the middle part of main shaft 1.
Front support assembly 4 tests object for bearing frictional torque, plays a supportive role simultaneously.Including corner connection to be measured Touching ball bearing 20, one end of angular contact ball bearing 20 to be measured fixed by the shaft shoulder testing main shaft 1, the other end by Front support locking nut 19 is locked.Angular contact ball bearing 20 to be measured is outer equipped with loading lasso 21, loads lasso 21 use interference fit with angular contact ball bearing 20 to be measured, to ensure to load lasso 21 and angular contact ball to be measured The motion of bearing 20 outer ring keeps synchronizing.Load and be coaxially installed with air thrust bearing 15 and air outside lasso 21 Journal bearing 17 is as loading and support means;Front support bearing it is coaxially installed with outside air journal bearing 17 Seat 16, front support bearing block 16 is fixed in laboratory table 5 by front rack 6.Rear support assembly 2 rises and props up The effect of support, including angular contact ball bearing 13, angular contact ball bearing 13 one end is solid by the shaft shoulder testing main shaft 1 Fixed, the other end is locked by rear support locking nut 11;Rear support bearing it is set with on angular contact ball bearing 13 Seat 12, rear trunnion bearing 12 is fixed by bolts on tail-bracket 9, and tail-bracket 9 is fixed on laboratory table 5 plate On face.
Air thrust bearing 15 circumference uniform six air thrust bearing pores 151 in order to provide compressed air, Thus on angular contact ball bearing 20 to be measured, apply pretightning force.Point circumference uniform four on air journal bearing 17 Row air journal bearing pore 171, each column is respectively arranged with six air journal bearing pores 171, in order to provide pressure Contracting air, forms air film loading between lasso 21 and angular contact ball bearing to be measured 20, thus main for experiment Axle 1 provides back support.
Front support bearing block 16 and miniature beam load cell 7 parallel position be equipped with pore so that flexible thin wire from Bearing block passes, is connected on miniature beam load cell 7.
Utilize air thrust bearing 15 to realize the contactless loading of rolling bearing pretightening power, supplied by regulation The size of pressure, can be with control action size of pretightning force on angular contact ball bearing 20 to be measured.Utilize air Journal bearing 17 as experiment spindle front and angular contact ball bearing to be measured 20, front support locking nut 19, Loading the support of lasso 21, this contactless loading and supporting way can ensure that angular contact ball axle to be measured Holding 20 can be freely-movable and unfettered so that measured data are more nearly the practical situation of bearing movable.
In measurement apparatus, sensor includes measuring the miniature beam load cell 7 of bearing frictional torque, measuring bearing Force transducer 22 loaded and measure bearing Internal and external cycle relative displacement displacement transducer 23.Miniature beam LOAD CELLS 7 is fixed in laboratory table 5 by miniature beam sensor bracket 8, and force transducer 22 is arranged on Loading on lasso 21, displacement transducer 23 is arranged on front support bearing block 16.
Load the lasso 21 external diameter accessory processing according to angular contact ball bearing 20 to be measured;Use light material with Reduce its impact treating angle measurement contact ball bearing 20 motion.This loading lasso 21 uses interference fit and treats Angle measurement contact ball bearing 20 outer ring connects, and the front end face of loading lasso 21 and periphery are through partial operation Process and realize axial loading and radially for coordinating with air thrust bearing 15, air journal bearing 17 Support.Load lasso 21 rib and be radially distributed with three circular grooves in order to installing force sensor 22, lasso inwall with Circular groove correspondence position has three wire casings in order to be drawn by pickup wire.The rear portion circumference minimum point of described lasso Position is provided with loading lasso boss 211, surveys for connecting to realize moment of friction with miniature beam load cell 7 Amount.
Miniature beam load cell 7 is fixed in laboratory table 5 by miniature beam sensor bracket 8, is adhesive in The flexible thin wire other end loaded on lasso boss 211 is connected on miniature beam load cell 7.Treat angle measurement The frictional force that contact ball bearing 20 inner ring produces when rotating with experiment main shaft 1 is delivered to angular contact ball bearing to be measured 20 outer rings, are delivered to load on lasso 21 then, make loading lasso 21 and miniature beam load cell 7 it Between have relative motion trend, now by miniature beam load cell 7 measure to active force can extrapolate Moment of friction when angular contact ball bearing 20 to be measured starts and stably rotates.
Force transducer 22 totally three, radial equipartition is arranged in loading lasso 21 rib, with angular contact to be measured Ball bearing 20 cycle surface contacts, and wire is drawn by loading the wire casing of lasso 21.Displacement transducer 23 is altogether Three, circumference is uniform to be arranged on front support end cap 18.
A kind of Frictional Moment for Rolling Bearings of the present invention and the measuring method of stiffness measurement device, the method can be carried out Different rotating speeds, pretightning force, the rigidity of operating mode lower bearing of axle power and the measurement of moment of friction, specifically include down Row step:
1) sensor is installed: be arranged on miniature beam sensor bracket 8 by miniature beam load cell 7, soft Property fine rule one end connect the gauge head of miniature beam load cell 7, its other end is through on front support bearing block 16 Through hole is also adhesive on the loading lasso boss 211 loading lasso 21 circumference;By some force transducers 22 weeks In being uniformly arranged on loading lasso 21 rib, and contact with the cycle surface of angular contact ball bearing 20 to be measured; Some displacement transducer 23 circumferences are uniformly arranged in the installing hole on front support drive end bearing bracket 18, and ensure The gauge head of displacement transducer 23 keeps setpoint distance with loading lasso 21;
2) open air supply system, check that air thrust bearing 15 and air journal bearing 17 supply loop works State;Regulation supply gas pressure, makes to form stable air film between air journal bearing 17 and loading lasso 21; Air thrust bearing 15 applies thrust to loading lasso 21, and passes to corner connection to be measured by loading lasso 21 Touch ball bearing 20 outer ring, make angular contact ball bearing 20 to be measured realize pretension;
3) start dragging electro spindle, drive experiment main shaft 1 to operate under setting speed;
4) obtained respectively by miniature beam load cell 7, some force transducers 22, some displacement transducers 23 Moment of friction M, bearing axial load variation delta F and Internal and external cycle phase to angular contact ball bearing 20 to be measured To displacement x;
5) moment of friction M under the conditions of angular contact ball bearing to be measured 20 different operating that will record, axially carry Lotus variation delta F, Internal and external cycle relative displacement Δ x record;By axial load variation delta F recorded, interior Circle relative displacement Δ x is depicted as bearing rigidity curve, obtains the bearing rigidity of angular contact ball bearing 20 to be measured;
6) after a DATA REASONING completes, by changing the rotating speed of angular contact ball bearing 20 to be measured, regulation sky The load that gas thrust bearing 15 applies changes pretightning force that angular contact ball bearing 20 to be measured born, by adding Carrier band wheel 3 regulation is applied to test the load on main shaft 1, obtains angular contact ball bearing 20 to be measured in different works Moment of friction under the conditions of work and stiffness measurement data.

Claims (7)

1. a Frictional Moment for Rolling Bearings and stiffness measurement device, it is characterised in that: include test main shaft (1), Rear support assembly (2), load belt wheel (3), front support assembly (4), laboratory table (5) and be fixed on reality Test the front rack (6) on platform (5), miniature beam sensor bracket (8) and tail-bracket (9);Wherein, real A shaft shoulder it is respectively arranged at the two ends with before and after testing main shaft (1);It is main that front support assembly (4) includes being arranged on experiment Angular contact ball bearing to be measured (20) at the shaft shoulder of axle (1) front end, the one of angular contact ball bearing to be measured (20) End is locked by front support locking nut (19) with the shaft shoulder laminating of experiment main shaft (1) front end, its other end, The circumference of angular contact ball bearing to be measured (20) is disposed with loading lasso (21), air radially from inside to outside Bearing (17) and front support bearing block (16), front support bearing block (16) is fixed on front rack (6), Experiment main shaft (1) front end is additionally provided with and loads lasso (21), air journal bearing (17) for fitting Air thrust bearing (15) and be used for sealing the front support drive end bearing bracket (18) of front support bearing block (16), empty On the end face of gas thrust bearing (15), circumference is evenly arranged with some offers compressed-air actuated air thrust bearing Pore (151), the circumference of air journal bearing (17) is evenly arranged with some in order to provide compressed-air actuated Air journal bearing pore (171), load lasso (21) is circumferentially provided with loading lasso boss (211), Some force transducers (22) circumference uniformly be arranged on load lasso (21) rib in, and with corner connection to be measured Touching the contact of ball bearing (20) cycle surface, some displacement transducers (23) circumference is uniformly arranged on front support On drive end bearing bracket (18);Rear support assembly (2) includes being arranged on the angle at the shaft shoulder of experiment main shaft (1) rear end Contact ball bearing (13), one end of angular contact ball bearing (13) and the shaft shoulder laminating of experiment main shaft (1) rear end, Its other end is locked by rear support locking nut (11), being circumferentially provided with of angular contact ball bearing (13) Rear trunnion bearing (12), rear trunnion bearing (12) is fixed on tail-bracket (9), rear support bearing Before and after seat (12), two ends are sealed by rear support drive end bearing bracket (14) and rear support rear end cap (10);Micro- Type beam load cell (7) is arranged on miniature beam sensor bracket (8), and it is passed by flexible thin wire and offers Through hole in front support bearing block (16) circumference is connected with loading lasso boss (211);Load belt wheel (3) It is arranged on the middle part of experiment main shaft (1).
A kind of Frictional Moment for Rolling Bearings the most according to claim 1 and stiffness measurement device, its feature It is: load lasso (21) and use interference fit to be arranged on the outer ring of angular contact ball bearing to be measured (20).
A kind of Frictional Moment for Rolling Bearings the most according to claim 1 and stiffness measurement device, its feature It is: load lasso boss (211) and be positioned at the rear portion circumference lowest point loading lasso (21) so that The measurement end of miniature beam load cell (7) is tangentially connected with loading lasso (21).
A kind of Frictional Moment for Rolling Bearings the most according to claim 1 and stiffness measurement device, its feature It is: on the end face of air thrust bearing (15), circumference is evenly arranged with six and provides compressed-air actuated air Thrust bearing pore (151).
A kind of Frictional Moment for Rolling Bearings the most according to claim 1 and stiffness measurement device, its feature It is: the circumference of air journal bearing (17) is evenly arranged with four row in order to provide compressed-air actuated air footpath To bearing pore (171), in each column, each circumference is evenly arranged with six air journal bearing pore (171).
A kind of Frictional Moment for Rolling Bearings the most according to claim 1 and stiffness measurement device, its feature Being: the quantity of force transducer (22) is three, its wire draws by loading the wire casing on lasso (21) Go out.
7. a kind of Frictional Moment for Rolling Bearings according to any one of claim 1 to 6 and stiffness measurement device Measuring method, it is characterised in that comprise the following steps:
1) sensor is installed: miniature beam load cell (7) is arranged on miniature beam sensor bracket (8) On, flexible thin wire one end connects the gauge head of miniature beam load cell (7), and its other end passes front support axle The upper through hole of bearing (16) is also adhesive in loading lasso boss (211) loading lasso (21) circumference;Will Some force transducers (22) circumference uniformly be arranged on loading lasso (21) rib in, and with angular contact to be measured The cycle surface contact of ball bearing (20);Prop up before some displacement transducers (23) circumference is uniformly arranged on In installing hole on brought forward end cap (18), and ensure gauge head and loading lasso (21) of displacement transducer (23) Keep setpoint distance;
2) open air supply system, check that air thrust bearing (15) and air journal bearing (17) supply back Road duty;Regulation supply gas pressure, makes air journal bearing (17) and loads shape between lasso (21) Become stable air film;Air thrust bearing (15) applies thrust to loading lasso (21), and by loading Lasso (21) passes to angular contact ball bearing to be measured (20) outer ring, makes angular contact ball bearing to be measured (20) Realize pretension;
3) start dragging electro spindle, drive experiment main shaft (1) to operate under setting speed;
4) by miniature beam load cell (7), some force transducers (22), some displacement transducers (23) Respectively obtain moment of friction M of angular contact ball bearing to be measured (20), bearing axial load variation delta F and Internal and external cycle relative displacement Δ x;
5) after a DATA REASONING completes, by changing the rotating speed of angular contact ball bearing to be measured (20), regulation Load that air thrust bearing (15) applies change pretightning force that angular contact ball bearing to be measured (20) born, It is applied to test the load on main shaft (1) by loading belt wheel (3) regulation, obtains angular contact ball axle to be measured Hold (20) moment of friction under various operating conditions and stiffness measurement data;The angular contact to be measured that will record Moment of friction M under the conditions of ball bearing (20) different operating, axial load variation delta F, Internal and external cycle are relative Displacement x is recorded;Axial load variation delta F recorded, inner ring relative displacement Δ x are depicted as bearing Stiffness curve, obtains the bearing rigidity of angular contact ball bearing to be measured (20).
CN201410448639.6A 2014-09-04 2014-09-04 A kind of Frictional Moment for Rolling Bearings and stiffness measurement device and method Active CN104236907B (en)

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CN105021338B (en) * 2015-08-12 2018-01-30 天津大学 A kind of torque-measuring apparatus and method for miniature tension-torsion fatigue tester
CN105258888B (en) * 2015-11-13 2018-01-19 西安交通大学 Research experiment device and measuring method of the bearing magnitude of interference to axis system performance impact
CN106122291A (en) * 2016-09-06 2016-11-16 沃德传动(天津)股份有限公司 A kind of bearing assembly and the pre-tightening apparatus of bearing
CN106525424B (en) * 2016-10-27 2018-12-21 安徽江淮汽车集团股份有限公司 The comprehensive measurement device and measurement method of bearing rigidity and starting friction torque
CN106649982B (en) * 2016-11-08 2020-05-08 大连工业大学 Method for calculating friction torque of large-cone-angle conical main bearing of wind driven generator
CN108775982B (en) * 2018-06-08 2020-04-07 陕西理工大学 Measuring device and measuring method for rotational friction torque of shafting shaft lever
CN110348110A (en) * 2019-07-08 2019-10-18 西安交通大学 A kind of bolt connected piece rigidity adaptive recognition methods

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