CN104236907A - Rolling bearing friction moment and stiffness measuring device and method - Google Patents

Rolling bearing friction moment and stiffness measuring device and method Download PDF

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Publication number
CN104236907A
CN104236907A CN201410448639.6A CN201410448639A CN104236907A CN 104236907 A CN104236907 A CN 104236907A CN 201410448639 A CN201410448639 A CN 201410448639A CN 104236907 A CN104236907 A CN 104236907A
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bearing
measured
lasso
angular contact
contact ball
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CN104236907B (en
Inventor
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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Xian Jiaotong University
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Xian Jiaotong University
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Abstract

The invention discloses a rolling bearing friction moment and stiffness measuring device and method. The device comprises an experimental spindle, a rear supporting assembly, a loading belt pulley, a front supporting assembly, an experiment table, a front bracket, a micro beam sensor bracket, a rear bracket and the like, wherein the front bracket, the micro beam sensor bracket, the rear bracket and the like are fixed to the experiment table. The method comprises the following steps that first, a micro beam weighing sensor, a force sensor and a displacement sensor are installed at corresponding positions; second, an angular contact ball bearing to be measured is pre-tightened by applying force to a loading ferrule; third, a driving motorized spindle is started to drive the experimental spindle to run at a set rotation speed; fourth, the friction moment, the axial load variable quantity and inner and outer ring relative displacement of the angular contact ball bearing to be measured are obtained through measurement; fifth, a bearing stiffness curve is drawn according to the measured axial load variable quantity and the measured inner and outer ring relative displacement, and the bearing stiffness of the angular contact ball bearing to be measured is obtained. According to the rolling bearing friction moment and stiffness measuring device and method, the friction moment and the stiffness of the rolling bearing under the influences of three factors including different rotation speeds, different pre-tightening force and different loads on the spindle can be measured.

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 stiffness measurement device and method.
[background technology]
Rolling bearing, as the important foundation part of mechanized equipment, is widely used in the every field of machine-building, and it plays a part carrying and transmits motion in mechanized equipment.Rolling bearing is in rotary course, due to its outer ring, inner ring, retainer, ball, the contacting with each other of seal member, there is moment of friction, the size of moment of friction not only depends on physical dimension, geometric accuracy, the material property of bearing itself, also relevant with operating load, assembly precision, lubricating condition and processing factors etc.The size of Frictional Moment for Rolling Bearings affects the thermal value of power consumption and bearing, and the temperature rise directly affecting bearing was lost efficacy, and is the important performance index of in bearing optimal design one.
[summary of the invention]
The object of the invention is to for the deficiencies in the prior art, provide a kind of Frictional Moment for Rolling Bearings and stiffness measurement device and method, it can detect and a kind ofly be arranged on rolling bearing in axle system under different rotating speeds, pretightning force and load on axle effect, corresponding moment of friction and rigidity.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of Frictional Moment for Rolling Bearings and stiffness measurement device, comprise experiment main shaft, rear support assembly, load belt wheel, front support assembly, experiment table and be fixed on the front rack on experiment table, miniature beam sensor bracket and tail-bracket, wherein, the rear and front end of testing main shaft is respectively provided with a shaft shoulder, front support assembly comprises the angular contact ball bearing to be measured being arranged on experiment front-end of spindle shaft shoulder place, fit with the experiment front-end of spindle shaft shoulder in one end of angular contact ball bearing to be measured, its other end is locked by front support set nut, the circumference of angular contact ball bearing to be measured is disposed with loading lasso from inside to outside, air transverse bearing and front support bearing seat, front support bearing seat is fixed on front rack, experiment front-end of spindle is also provided with for loading lasso of fitting, the air thrust bearing of air transverse bearing and the front support front end end cover for sealing front support bearing seat, on the end face of air thrust bearing, circumference is evenly provided with and somely provides compressed-air actuated air thrust bearing pore, the circumference of air transverse bearing is evenly provided with some in order to provide compressed-air actuated air transverse bearing pore, the circumference loading lasso is provided with one and loads lasso boss, some force snesor circumferences are evenly arranged in the rib of loading lasso, and with angular contact ball bearing outer ring end contact to be measured, some displacement transducer circumferences are evenly arranged on front support front end end cover, rear support assembly comprises the angular contact ball bearing being arranged on experiment rear-end of spindle shaft shoulder place, fit with the experiment rear-end of spindle shaft shoulder in one end of angular contact ball bearing, its other end is locked by rear support set nut, the circumference of angular contact ball bearing is provided with rear trunnion bearing, rear trunnion bearing is fixed on tail-bracket, and the rear and front end of rear trunnion bearing is by rear support front end end cover and the sealing of rear support rear end cap, miniature beam load cell is arranged on miniature beam sensor bracket, and it is connected with loading lasso boss through the through hole being opened in front support bearing seat circumference by flexible thin wire, load the middle part that belt wheel is arranged on experiment main shaft.
The present invention improves further and is: load lasso and adopt interference fit to be arranged on the outer ring of angular contact ball bearing to be measured.
The present invention improves further and is: load lasso boss be positioned at load lasso) rear portion circumference lowest point, make the measuring junction of miniature beam load cell and load lasso and be tangentially connected.
The present invention improves further and is: on the end face of air thrust bearing, circumference is evenly provided with six and provides compressed-air actuated air thrust bearing pore.
The present invention improves further and is: the circumference of air transverse bearing is evenly provided with four row in order to provide compressed-air actuated air transverse bearing pore, and often the upper each circumference of row is evenly provided with six air transverse bearing pores.
The present invention improves further and is: the quantity of force snesor is three, and its wire is drawn by the wire casing loaded on lasso.
A measuring method for Frictional Moment for Rolling Bearings and stiffness measurement device, comprises the following steps:
1) sensor installation: miniature beam load cell is arranged on miniature beam sensor bracket, flexible thin wire one end connects the gauge head of miniature beam load cell, and its other end passes through hole on front support bearing seat and is adhesive on the loading lasso boss of loading lasso circumference; Some force snesor circumferences are evenly arranged on and load in lasso rib, and contact with the cycle surface of angular contact ball bearing to be measured; Some displacement transducer circumferences are evenly arranged in the mounting hole on front support front end end cover, and ensure that the gauge head of displacement transducer keeps setpoint distance with loading lasso;
2) open air supply system, check air thrust bearing and air transverse bearing air feed loop works state; Regulate supply gas pressure, make air transverse bearing and load between lasso to form stable air film; Air thrust bearing to loading lasso applied thrust, and passes to angular contact ball bearing outer ring to be measured by loading lasso, makes angular contact ball bearing to be measured realize pretension;
3) start dragging electro spindle, drive experiment main shaft to operate under setting speed;
4) moment of friction M, bearing axial load variation delta F and the Internal and external cycle relative displacement Δ x of angular contact ball bearing to be measured is obtained respectively by miniature beam load cell, some force snesor, some displacement transducers;
5) moment of friction M, the axial load variation delta F under the angular contact ball bearing different operating condition to be measured recorded, Internal and external cycle relative displacement Δ x are recorded; The axial load variation delta F recorded, inner ring relative displacement Δ x are depicted as bearing rigidity curve, obtain the bearing rigidity of angular contact ball bearing to be measured.
8, the measuring method of a kind of Frictional Moment for Rolling Bearings according to claim 7 and stiffness measurement device, is characterized in that, further comprising the steps of:
6) after a DATA REASONING completes, change pretightning force that angular contact ball bearing to be measured bears by the rotating speed that changes angular contact ball bearing to be measured, the load that regulates air thrust bearing to apply, regulated the load be applied on experiment main shaft by loaded ribbon wheel, obtain angular contact ball bearing to be measured moment of friction under various operating conditions and stiffness measurement data.
Compared with prior art, the present invention has following technique effect:
A kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device and method, the method can measure rotating speed, pretightning force, the moment of friction of load on axle three factors impact time rolling bearings and rigidity; Utilize air bearing to realize contactless loading in this device and support and can ensure that angular contact ball bearing to be measured can free movement and unfettered, make measured data more close to the actual conditions of bearing movable.
[accompanying drawing explanation]
Fig. 1 is the stereographic map of a kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device;
Fig. 2 a is the front elevation that a kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device remove a kind of state after experiment table, and Fig. 2 b is that the A-A of Fig. 2 a is to cut-open view;
Fig. 3 a is the front elevation that a kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device remove the another kind of state after experiment table, and Fig. 3 b is that the B-B of Fig. 3 a is to cut-open view;
Fig. 4 is the structural representation of air thrust bearing of the present invention;
Fig. 5 is the structural representation of air transverse bearing of the present invention;
Fig. 6 is force snesor installation site figure of the present invention.
Wherein: 1, test main shaft; 2, rear support assembly; 3, belt wheel is loaded; 4, front support assembly; 5, experiment table; 6, front rack; 7, miniature beam load cell; 8, miniature beam sensor bracket; 9, tail-bracket; 10, rear support rear end cap; 11, rear support set nut; 12, rear trunnion bearing; 13, angular contact ball bearing; 14, rear support front end end cover; 15, air thrust bearing; 16, front support bearing seat; 17, air transverse bearing; 18, front support front end end cover; 19, front support set nut; 20, angular contact ball bearing to be measured; 21, lasso is loaded; 22, force snesor; 23, displacement transducer; 151, air thrust bearing pore; 171, air transverse bearing pore; 211, lasso boss is loaded.
[embodiment]
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See Fig. 1 to Fig. 6, a kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device, comprise experiment main shaft 1, rear support assembly 2, load belt wheel 3, front support assembly 4, experiment table 5 and be fixed on the front rack 6 on experiment table 5, miniature beam sensor bracket 8 and tail-bracket 9, wherein, the rear and front end of testing main shaft 1 is respectively provided with a shaft shoulder, front support assembly 4 comprises the angular contact ball bearing to be measured 20 being arranged on experiment shaft shoulder place, main shaft 1 front end, fit with the experiment main shaft 1 front end shaft shoulder in one end of angular contact ball bearing 20 to be measured, its other end is locked by front support set nut 19, the circumference of angular contact ball bearing 20 to be measured is disposed with from inside to outside and loads lasso 21, air transverse bearing 17 and front support bearing seat 16, front support bearing seat 16 is bolted on front rack 6, experiment main shaft 1 front end is also provided with and loads lasso 21 for fitting, the air thrust bearing 15 of air transverse bearing 17 and the front support front end end cover 18 for sealing front support bearing seat 16, air transverse bearing 17 and air thrust bearing 15 are as loading and bracing or strutting arrangement, on the end face of air thrust bearing 15, circumference is evenly provided with and somely provides compressed-air actuated air thrust bearing pore 151, the circumference of air transverse bearing 17 is evenly provided with some in order to provide compressed-air actuated air transverse bearing pore 171, the circumference loading lasso 21 is provided with one and loads lasso boss 211, some force snesor 22 circumferences are evenly arranged in the rib of loading lasso 21, and contact with angular contact ball bearing 20 cycle surface to be measured, some displacement transducer 23 circumferences are evenly arranged on front support front end end cover 18, rear support assembly 2 comprises the angular contact ball bearing 13 being arranged on experiment shaft shoulder place, main shaft 1 rear end, fit with the experiment main shaft 1 rear end shaft shoulder in one end of angular contact ball bearing 13, its other end is locked by rear support set nut 11, the circumference of angular contact ball bearing 13 is provided with rear trunnion bearing 12, rear trunnion bearing 12 is bolted on tail-bracket 9, and the rear and front end of rear trunnion bearing 12 is sealed by rear support front end end cover 14 and rear support rear end cap 10, miniature beam load cell 7 is arranged on miniature beam sensor bracket 8, and it is connected with loading lasso boss 211 through the through hole being opened in front support bearing seat 16 circumference by flexible thin wire, load the middle part that belt wheel 3 is arranged on experiment main shaft 1, can to experiment main shaft 1 imposed load.
Wherein, load lasso 21 and adopt interference fit to be arranged on the outer ring of angular contact ball bearing 20 to be measured, be consistent to ensure to move with 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, the measuring junction of miniature beam load cell 7 is tangentially connected with loading lasso 21, the power of measurement is passed to force snesor 22.The i.e. measuring junction of miniature beam load cell 7 and the position keeping parallelism of loading lasso boss 211, and height is consistent with the height and position loading lasso boss 211.
Further, on the end face of air thrust bearing 15, circumference is evenly provided with six and provides compressed-air actuated air thrust bearing pore 151, thus applies pretightning force on angular contact ball bearing 20 to be measured.The circumference of air transverse bearing 17 is evenly provided with four row in order to provide compressed-air actuated air transverse bearing pore 171, often the upper each circumference of row is evenly provided with six air transverse bearing pores 171, make air transverse bearing 17 and load lasso 21 and between form air film, thus for experiment main shaft back support is provided.The quantity of force snesor 22 is three, and its wire is drawn by the wire casing loaded on lasso 21.
In order to understand further the present invention, now its structure is described in further details.
A kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device, comprise the miniature beam load cell 7 of the moment of friction of experiment main shaft 1, rolling bearing rigidity detection device and measurement rolling bearing; Experiment main shaft 1 is arranged on experiment table 5 by front rack 6 and tail-bracket 9; The rear end of experiment main shaft 1 uses shaft coupling to be connected with the front end dragging electro spindle and ensures coaxial.Experiment main shaft 1 as supporting, is provided with the loading belt wheel 3 for loading force by former and later two supportings in the middle part of experiment main shaft 1.
Front support assembly 4 is bearing frictional torque tested object, plays a supportive role simultaneously.Comprise angular contact ball bearing 20 to be measured, one end of angular contact ball bearing 20 to be measured is fixed by the shaft shoulder of testing main shaft 1, and the other end is locked by front support set nut 19.Be equipped with outside angular contact ball bearing 20 to be measured and load lasso 21, load lasso 21 and adopt interference fit with angular contact ball bearing 20 to be measured, to move with angular contact ball bearing 20 outer ring to be measured keep synchronous to ensure to load lasso 21.Load and to be coaxially installed with air thrust bearing 15 and air transverse bearing 17 outside lasso 21 as loading and bracing or strutting arrangement; Be coaxially installed with front support bearing seat 16 outside air transverse bearing 17, front support bearing seat 16 is fixed on experiment table 5 by front rack 6.Rear support assembly 2 plays a part to support, and comprise angular contact ball bearing 13, angular contact ball bearing 13 one end is fixed by the shaft shoulder of testing main shaft 1, and the other end is locked by rear support set nut 11; Angular contact ball bearing 13 is set with rear trunnion bearing 12, rear trunnion bearing 12 is fixed by bolts on tail-bracket 9, and tail-bracket 9 is fixed on experiment table 5 plate face.
Uniform six the air thrust bearing pores 151 of air thrust bearing 15 circumference in order to provide pressurized air, thus apply pretightning force on angular contact ball bearing 20 to be measured.Point uniform four row air transverse bearing pores 171 of circumference on air transverse bearing 17, often row there are six air transverse bearing pores 171, in order to provide pressurized air, between loading lasso 21 and angular contact ball bearing to be measured 20, form air film, thus provide back support for testing main shaft 1.
Front support bearing seat 16 and miniature beam load cell 7 parallel position are equipped with pore and pass from bearing seat to make flexible thin wire, are connected on miniature beam load cell 7.
Air thrust bearing 15 is utilized to realize the contactless loading of rolling bearing pretightening power, by regulating the size of supply gas pressure, can the size of control action pretightning force on angular contact ball bearing 20 to be measured.Utilize air transverse bearing 17 as experiment spindle front and angular contact ball bearing to be measured 20, front support set nut 19, load the support of lasso 21, this contactless loading and supporting way can ensure that angular contact ball bearing 20 to be measured can free movement and unfettered, make measured data more close to the actual conditions of bearing movable.
In measurement mechanism, sensor comprises the miniature beam load cell 7 measuring bearing frictional torque, the force snesor 22 measuring load suffered by bearing and measures the displacement transducer 23 of bearing enclose relative displacement.Miniature beam load cell 7 is fixed on experiment table 5 by miniature beam sensor bracket 8, and force snesor 22 is arranged on and loads on lasso 21, and displacement transducer 23 to be arranged on front support bearing seat 16.
Load lasso 21 according to the external diameter accessory processing of angular contact ball bearing 20 to be measured; Adopt light material to reduce the impact that it treats angle measurement contact ball bearing 20 motion.This loading lasso 21 adopts interference fit to be connected with angular contact ball bearing 20 outer ring to be measured, and the front end face and the periphery that load lasso 21 realize axial loading and the support of radial direction through partial operation process for coordinating with air thrust bearing 15, air transverse bearing 17.Load lasso 21 rib and be radially distributed with three circular grooves in order to installing force sensor 22, lasso inwall and circular groove correspondence position have three wire casings in order to be drawn by pickup wire.The rear portion circumference lowest point of described lasso is provided with and loads lasso boss 211, for being connected to realize measurement of friction torque with miniature beam load cell 7.
Miniature beam load cell 7 is fixed on experiment table 5 by miniature beam sensor bracket 8, is adhesive in the flexible thin wire other end loaded on lasso boss 211 and is connected on miniature beam load cell 7.The friction force that angular contact ball bearing 20 inner ring to be measured produces when rotating with experiment main shaft 1 is delivered to angular contact ball bearing 20 outer ring to be measured, then be delivered to and load on lasso 21, make there is relative motion trend between loading lasso 21 and miniature beam load cell 7, the acting force now measured by miniature beam load cell 7 can be extrapolated angular contact ball bearing 20 to be measured and starts and stablize moment of friction when rotating.
Force snesor 22 totally three, radial equipartition is arranged on and loads in lasso 21 rib, contacts with angular contact ball bearing 20 cycle surface to be measured, and wire is drawn by the wire casing loading lasso 21.Displacement transducer 23 totally three, circumference is uniform to be arranged on front support end cap 18.
The measuring method of a kind of Frictional Moment for Rolling Bearings of the present invention and stiffness measurement device, the method can carry out different rotating speeds, pretightning force, the rigidity of operating mode lower bearing of axle power and the measurement of moment of friction, specifically comprises the following steps:
1) sensor installation: miniature beam load cell 7 is arranged on miniature beam sensor bracket 8, flexible thin wire one end connects the gauge head of miniature beam load cell 7, and its other end passes through hole on front support bearing seat 16 and is adhesive on the loading lasso boss 211 of loading lasso 21 circumference; Some force snesor 22 circumferences are evenly arranged on and load in lasso 21 rib, and contact with the cycle surface of angular contact ball bearing 20 to be measured; Some displacement transducer 23 circumferences are evenly arranged in the mounting hole on front support front end end cover 18, and ensure that the gauge head of displacement transducer 23 keeps setpoint distance with loading lasso 21;
2) open air supply system, check air thrust bearing 15 and air transverse bearing 17 air feed loop works state; Regulate supply gas pressure, make air transverse bearing 17 and load between lasso 21 to form stable air film; Air thrust bearing 15 to loading lasso 21 applied thrust, and passes to angular contact ball bearing 20 outer ring to be measured by loading lasso 21, makes 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) moment of friction M, bearing axial load variation delta F and the Internal and external cycle relative displacement Δ x of angular contact ball bearing 20 to be measured is obtained respectively by miniature beam load cell 7, some force snesor 22, some displacement transducers 23;
5) moment of friction M, the axial load variation delta F under the angular contact ball bearing to be measured 20 different operating condition recorded, Internal and external cycle relative displacement Δ x are recorded; The axial load variation delta F recorded, inner ring relative displacement Δ x are depicted as bearing rigidity curve, obtain the bearing rigidity of angular contact ball bearing 20 to be measured;
6) after a DATA REASONING completes, change pretightning force that angular contact ball bearing 20 to be measured bears by the rotating speed that changes angular contact ball bearing 20 to be measured, the load that regulates air thrust bearing 15 to apply, regulate by loading belt wheel 3 load be applied on experiment main shaft 1, obtain angular contact ball bearing 20 to be measured moment of friction under various operating conditions and stiffness measurement data.

Claims (8)

1. Frictional Moment for Rolling Bearings and a stiffness measurement device, is characterized in that: the front rack (6), miniature beam sensor bracket (8) and the tail-bracket (9) that comprise experiment main shaft (1), rear support assembly (2), loading belt wheel (3), front support assembly (4), experiment table (5) and be fixed on experiment table (5), wherein, the rear and front end of testing main shaft (1) is respectively provided with a shaft shoulder, front support assembly (4) comprises the angular contact ball bearing to be measured (20) being arranged on experiment shaft shoulder place, main shaft (1) front end, fit with experiment main shaft (1) the front end shaft shoulder in one end of angular contact ball bearing to be measured (20), its other end is by front support set nut (19) locking, the circumference of angular contact ball bearing to be measured (20) is disposed with from inside to outside and loads lasso (21), air transverse bearing (17) and front support bearing seat (16), front support bearing seat (16) is fixed on front rack (6), experiment main shaft (1) front end is also provided with and loads lasso (21) for fitting, the air thrust bearing (15) of air transverse bearing (17) and the front support front end end cover (18) for sealing front support bearing seat (16), on the end face of air thrust bearing (15), circumference is evenly provided with and somely provides compressed-air actuated air thrust bearing pore (151), the circumference of air transverse bearing (17) is evenly provided with some in order to provide compressed-air actuated air transverse bearing pore (171), the circumference loading lasso (21) is provided with one and loads lasso boss (211), some force snesor (22) circumference is evenly arranged in the rib of loading lasso (21), and contact with angular contact ball bearing to be measured (20) cycle surface, some displacement transducers (23) circumference is evenly arranged on front support front end end cover (18), rear support assembly (2) comprises the angular contact ball bearing (13) being arranged on experiment shaft shoulder place, main shaft (1) rear end, fit with experiment main shaft (1) the rear end shaft shoulder in one end of angular contact ball bearing (13), its other end is by rear support set nut (11) locking, the circumference of angular contact ball bearing (13) is provided with rear trunnion bearing (12), rear trunnion bearing (12) is fixed on tail-bracket (9), the rear and front end of rear trunnion bearing (12) is by rear support front end end cover (14) and rear support rear end cap (10) sealing, miniature beam load cell (7) is arranged on miniature beam sensor bracket (8), and it is connected with loading lasso boss (211) through the through hole being opened in front support bearing seat (16) circumference by flexible thin wire, load the middle part that belt wheel (3) is arranged on experiment main shaft (1).
2. a kind of Frictional Moment for Rolling Bearings according to claim 1 and stiffness measurement device, is characterized in that: load lasso (21) and adopt interference fit to be arranged on the outer ring of angular contact ball bearing to be measured (20).
3. a kind of Frictional Moment for Rolling Bearings according to claim 1 and stiffness measurement device, it is characterized in that: load lasso boss (211) and be positioned at the rear portion circumference lowest point loading lasso (21), the measuring junction of miniature beam load cell (7) is tangentially connected with loading lasso (21).
4. a kind of Frictional Moment for Rolling Bearings according to claim 1 and stiffness measurement device, is characterized in that: on the end face of air thrust bearing (15), circumference is evenly provided with six and provides compressed-air actuated air thrust bearing pore (151).
5. a kind of Frictional Moment for Rolling Bearings according to claim 1 and stiffness measurement device, it is characterized in that: the circumference of air transverse bearing (17) is evenly provided with four row in order to provide compressed-air actuated air transverse bearing pore (171), often the upper each circumference of row is evenly provided with six air transverse bearing pores (171).
6. a kind of Frictional Moment for Rolling Bearings according to claim 1 and stiffness measurement device, is characterized in that: the quantity of force snesor (22) is three, and its wire is drawn by the wire casing loaded on lasso (21).
7. a kind of Frictional Moment for Rolling Bearings according to any one of claim 1 to 6 and the measuring method of stiffness measurement device, is characterized in that, comprise the following steps:
1) sensor installation: miniature beam load cell (7) is arranged on miniature beam sensor bracket (8), flexible thin wire one end connects the gauge head of miniature beam load cell (7), and its other end passes the upper through hole of front support bearing seat (16) and is adhesive in and loads on the circumferential loading lasso boss (211) of lasso (21); Some force snesor (22) circumference is evenly arranged on and loads in lasso (21) rib, and contact with the cycle surface of angular contact ball bearing to be measured (20); Some displacement transducers (23) circumference is evenly arranged in the mounting hole on front support front end end cover (18), and ensures that the gauge head of displacement transducer (23) keeps setpoint distance with loading lasso (21);
2) open air supply system, check air thrust bearing (15) and air transverse bearing (17) air feed loop works state; Regulate supply gas pressure, make air transverse bearing (17) and load between lasso (21) to form stable air film; Air thrust bearing (15) is to loading lasso (21) applied thrust, and pass to angular contact ball bearing to be measured (20) outer ring by loading lasso (21), make 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) moment of friction M, bearing axial load variation delta F and the Internal and external cycle relative displacement Δ x of angular contact ball bearing to be measured (20) is obtained respectively by miniature beam load cell (7), some force snesor (22), some displacement transducers (23);
5) moment of friction M, the axial load variation delta F under angular contact ball bearing to be measured (20) the different operating condition recorded, Internal and external cycle relative displacement Δ x are recorded; The axial load variation delta F recorded, inner ring relative displacement Δ x are depicted as bearing rigidity curve, obtain the bearing rigidity of angular contact ball bearing to be measured (20).
8. the measuring method of a kind of Frictional Moment for Rolling Bearings according to claim 7 and stiffness measurement device, is characterized in that, further comprising the steps of:
6) after a DATA REASONING completes, by the rotating speed, the pretightning force regulating air thrust bearing (15) load that applies to change angular contact ball bearing to be measured (20) to bear that change angular contact ball bearing to be measured (20), regulating by loading belt wheel (3) load be applied in experiment main shaft (1), obtaining angular contact ball bearing to be measured (20) moment of friction under various operating conditions and stiffness measurement data.
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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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
CN106525424A (en) * 2016-10-27 2017-03-22 安徽江淮汽车集团股份有限公司 Comprehensive measurement device and method for bearing rigidity and starting friction torque
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CN105021338A (en) * 2015-08-12 2015-11-04 天津大学 Torque measurement apparatus and method for miniature tension-torsion fatigue testing machine
CN105258888A (en) * 2015-11-13 2016-01-20 西安交通大学 Research experiment apparatus and measurement method for influences of bearing interference on main shaft system performance
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
CN106525424A (en) * 2016-10-27 2017-03-22 安徽江淮汽车集团股份有限公司 Comprehensive measurement device and method for bearing rigidity and starting friction torque
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
CN106649982A (en) * 2016-11-08 2017-05-10 大连工业大学 Calculating method for main bearing friction moment of wind driven generator big taper angle circular cone
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
CN108775982A (en) * 2018-06-08 2018-11-09 陕西理工大学 A kind of measuring device and measuring method of shafting shaft pivoting friction torque
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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