CN203337382U - Bearing precision performance testing device - Google Patents

Bearing precision performance testing device Download PDF

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Publication number
CN203337382U
CN203337382U CN2013203229371U CN201320322937U CN203337382U CN 203337382 U CN203337382 U CN 203337382U CN 2013203229371 U CN2013203229371 U CN 2013203229371U CN 201320322937 U CN201320322937 U CN 201320322937U CN 203337382 U CN203337382 U CN 203337382U
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CN
China
Prior art keywords
main shaft
bearing
testing device
temperature sensor
performance testing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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CN2013203229371U
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Chinese (zh)
Inventor
张进华
洪军
王煜
朱永生
姚建国
杨朝晖
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Xian Jiaotong University
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Xian Jiaotong University
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Priority to CN2013203229371U priority Critical patent/CN203337382U/en
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Publication of CN203337382U publication Critical patent/CN203337382U/en
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Abstract

The utility model discloses a bearing precision performance testing device. The device comprises a main shaft and a motor. The motor is installed on a first rack. The main shaft is fixed on a second rack through a main shaft shell which is sleeved outside the main shaft. A rear end of the main shaft is fixedly connected with an output shaft of the motor. A front end of the main shaft and an internal portion of the main shaft shell is provided with a measured bearing. On the main shaft shell, a surface of the main shaft shell which is cooperated with the measured bearing is provided with radial through holes used to install an acceleration sensor and a temperature sensor. A portion of the front end of the main shaft is provided with displacement sensors used to measure diameter runout of the front end of the main shaft, wherein the portion is extended out of the main shaft shell. According to the utility model, the main shaft and the motor are fixed on the two racks respectively and influence of vibration of a servo motor to the main shaft is reduced. A rear end of the main shaft adopts a pair of angular contact ball bearings to support so that rotation precision and rigidity of the main shaft are increased. A constant-pressure pre-tightening device is installed. Types and quantities of used springs can be changed according to a test requirement and constant-pressure pre-tightening can be performed on the measured bearing.

Description

A kind of bearing accuracy performance testing device
Technical field
The utility model belongs to the bearing field tests, is specifically related to a kind of bearing accuracy performance testing device.
Background technology
Rolling bearing is application in machine equipments one of important foundation part very widely, especially on the manufacture machine tool of high-speed, high precision, the precision stability of rolling bearing and will directly affect the quality of processing work to temperature, acceleration, the isoparametric control of main axis jerking etc.Therefore, before bearing dispatches from the factory, long operational test is carried out in bearing sampling to same batch, measure the rotating accuracy of bearing and the precision stability that detects bearing, and each running parameter of monitoring bearing is very necessary under the condition of different pretensions, different lubricating system, different rotating speeds and different loads.The bearing accuracy testing machine for testing performance complex structure of widespread use at present, and with the actual operating conditions of bearing, relatively large deviation is arranged, the physical quantity of measurement is on the low side and precision is not high, and versatility is poor, and using value in practice is less.
The utility model content
The purpose of this utility model is to address the above problem, a kind of bearing accuracy performance testing device is provided, this proving installation can the parameters such as temperature, vibration acceleration and rotating accuracy to the measured bearing outer ring be tested and be monitored under the condition of different rotating speeds, different pretension and different loads, the analysis to measure data, detect the performance of bearing aspect precision, and definite and lubricated, the isoparametric selection of pretension of bearing geometric parameter are instructed.
For achieving the above object, the technical scheme that the utility model adopts is: comprise main shaft and motor, motor is arranged on the first frame, and main shaft is fixed on the second frame by the main shaft housing that is set in its outside; The rear end of main shaft is fixedly connected with the output shaft of motor; At the front end of main shaft, the inside of main shaft housing is provided with measured bearing; On the main shaft housing, on the face that the main shaft housing matches with measured bearing, offer for the radial direction through hole of acceleration transducer and temperature sensor is installed; The part that front-end of spindle stretches out the main shaft housing is equipped with for measuring the displacement transducer of front-end of spindle diameter run-out.
Above-mentioned rear-end of spindle is set with the pre-tightening apparatus that makes measured bearing level pressure pretension.
Above-mentioned pre-tightening apparatus comprises the pair of horns contact ball bearing, is set with bearing seat on angular contact ball bearing; , between bearing seat and main shaft housing, also be provided with linear bearing; Be fixed with preloading spring on the front end face of bearing seat, the other end of preloading spring is fixedly connected with the main shaft housing by thrust plate.
Offer four circumferential equally distributed radial direction through hole on above-mentioned main shaft housing, wherein three are used for mounting temperature sensor, and one is used for installing acceleration transducer; Described temperature sensor directly is fixedly connected with the outer ring of measured bearing with acceleration transducer.
Have in the hollow bolt in hole in the middle of above-mentioned temperature sensor is arranged on, by the mesopore bolt, temperature sensor is fixed on the main shaft housing; Between temperature sensor and hollow bolt, holddown spring is installed, the spring stop bit point that an end of holddown spring is fixed on below temperature sensor is upper, and the other end is fixed on the lower end of hollow bolt; The upper end of temperature sensor is connected with output signal line.
Above-mentioned main shaft comprises the main shaft mandrel, and the front end of main shaft mandrel is processed with the threaded hole for the setting-up eccentricity mandrel; The rear end of main shaft mandrel is fixedly connected with the output shaft of motor.
The rear end of above-mentioned main shaft is fixedly connected with the output shaft of motor by flexible clutch.
In the threaded hole of above-mentioned main shaft mandrel front end, be equipped with for giving main shaft diameter to the eccentric mandrel that applies quantitative load.
Above-mentioned front-end of spindle stretches out the part of main shaft housing, and 180 degree of being separated by a circumferential direction are symmetrically installed with two displacement transducers.
Above-mentioned motor is servomotor.
Compared with prior art, the utlity model has following beneficial effect:
A kind of bearing accuracy performance testing device of the utility model, main shaft and motor are individually fixed on two frames, reduce the impact of the vibration of servomotor on main shaft, improve running accuracy and the rigidity of main shaft, reduced the interference of servomotor to the measured bearing running.
Further, the rear end of the utility model main shaft is equipped with pre-tightening apparatus, can change according to testing requirements kind and the quantity of spring used, realizes the level pressure pretension to measured bearing.
Further, main shaft of the present utility model is connected with the output shaft of servomotor by flexible clutch and the drive shaft rotation, reduces to greatest extent the impact of the vibration of servomotor on main shaft, guarantees the reliability of sensor measurement data.
Further, rear-end of spindle of the present utility model adopts the angular contact ball bearing of a pair of precision to support, and can improve running accuracy and the rigidity of main shaft, and further reduces the interference of servomotor to the measured bearing running.
Further, the utility model adopts the temperature sensor with radial spring hold-down mechanism, avoid separating because vibration causes described temperature sensor the accuracy that impact is measured with the measured bearing outer ring, the outer ring close contact that also can guarantee temperature sensor and measured bearing under the condition of extraneous vibration is being arranged, improving temperature measurement accuracy.
Further, front-end of spindle of the present utility model 180 degree of being separated by a circumferential direction are symmetrically installed with two precise displacement sensors that are arranged symmetrically with the air plug gauge radial displacement, process with two-point method the displacement data of adopting, can separate in real time the shape error that obtains main shaft and the turn error of bearing, carry out long running test, record the variation of main shaft bearing turn error, can detect the precision stability of measured bearing.
Further, eccentric mandrel is installed on main shaft of the present utility model, the size and location that can determine eccentric mass according to size and the active position of required loading force, realize the quantitative loading radially to main shaft bearing.
The accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model;
The structural representation that Fig. 2 is the utility model temperature sensor.
Wherein, 1 is measured bearing; 2 is acceleration transducer; 3 is the main shaft housing; 4 is preloading spring; 5 is bearing seat; 6 is angular contact ball bearing; 7 is flexible clutch; 8 is servomotor; 9 is linear bearing; 10 is the main shaft mandrel; 11 is eccentric mandrel; 12 is temperature sensor; 121 is spring stop bit point; 122 is holddown spring; 123 is set nut; 124 is output signal line; 125 is hollow bolt; 13 is thrust plate.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done to further detailed introduction:
Referring to Fig. 1, the utility model comprises main shaft and servomotor 8, and servomotor 8 is arranged on the first frame, and main shaft is fixed on the second frame by the main shaft housing 3 that is set in its outside; Main shaft comprises main shaft mandrel 10, and the front end of main shaft mandrel 10 is processed with the threaded hole for setting-up eccentricity mandrel 11, in the threaded hole of main shaft mandrel 10 front ends, is equipped with for giving main shaft diameter to the eccentric mandrel 11 that applies quantitative load; The rear end of main shaft mandrel 10 is fixedly connected with the output shaft of servomotor 8 by flexible clutch 7, servomotor 8 drive shaft rotations, main shaft and servomotor are separately fixed on two different frames and adopt the flexible clutch transmission, realize flexibly connecting between main shaft and servomotor, reduce to greatest extent the impact of the vibration of servomotor on main shaft, guarantee the reliability of sensor measurement data; Main shaft is fixed on frame by main shaft housing 3; The rear end of main shaft is fixedly connected with the output shaft of servomotor 8; At the front end of main shaft, the inside of main shaft housing 3 is provided with measured bearing 1, and rear-end of spindle is set with the pre-tightening apparatus that makes measured bearing 1 level pressure pretension; Pre-tightening apparatus comprises pair of horns contact ball bearing 6, be set with bearing seat 5 on angular contact ball bearing 6, pre-tightening apparatus can be realized the level pressure pretension to measured bearing according to testing requirements, rear end adopts a pair of precision corner contact ball bearing to support, can improve running accuracy and the rigidity of main shaft, further reduce the impact of servomotor on measured bearing; Also be provided with linear bearing 9 between bearing seat 5 and main shaft housing 3; Be fixed with preloading spring 4 on the front end face of bearing seat 5, the other end of preloading spring 4 is fixedly connected with main shaft housing 3 by thrust plate 13; On main shaft housing 3, offer four circumferential equally distributed radial direction through hole on the face that main shaft housing 3 matches with measured bearing 1, wherein three are used for 12, one of mounting temperature sensors and are used for installing acceleration transducer 2; Described temperature sensor 12 directly is fixedly connected with the outer ring of measured bearing with acceleration transducer 2; Wherein, in the middle of temperature sensor 12 is arranged on, have in the hollow bolt 125 in hole, by mesopore bolt 125, temperature sensor 12 is fixed on main shaft housing 3; Between temperature sensor and hollow bolt 125, holddown spring 122 is installed, an end of holddown spring 122 is fixed on the spring stop bit point 121 of temperature sensor 12 belows, and the other end is fixed on the lower end of hollow bolt 125; The upper end of temperature sensor 12 is connected with output signal line 124, hollow bolt 125 is screwed into to certain depth in the threaded hole of main shaft housing 3, and fastening with set nut 123, will holddown spring, spring just can compress temperature sensor, force itself and measured bearing outer ring to keep close contact, avoid separating because vibration causes described temperature sensor the accuracy that impact is measured with the measured bearing outer ring; Acceleration transducer 2 and temperature sensor 12, by the through hole on main shaft housing 3, directly are fixedly connected with the outer ring of measured bearing 1, guarantee the credibility of acceleration signal and temperature signal; Front-end of spindle stretches out the part of main shaft housing 3, and 180 degree of being separated by a circumferential direction are symmetrically installed with two the displacement transducer S1, the S2 that are used for measuring the front-end of spindle diameter run-out; Be used for measuring the front-end of spindle radial displacement, process displacement data with two-point method, can separate in real time the shape error that obtains main shaft and the turn error of bearing, carry out long running test, record the variation of main shaft bearing turn error, can detect the precision stability of measured bearing under certain test condition.
The utility model also is furnished with oil-mist system, can, according to testing requirements, adopt respectively grease lubrication or oil spray lubrication mode to be lubricated measured bearing.
The course of work of the present utility model is such:
Before test, the radial load required according to measured bearing and required pretightning force, process corresponding eccentric mandrel and determine kind and the quantity of preloading spring used, on request measured bearing is lubricated and can allows servomotor drag main shaft with certain rotating speed to rotate and start the pick-up transducers data.
Process the data of front-end of spindle precise displacement sensor with two-point method, can obtain shape error and the real-time turn error of main shaft bearing of main shaft, test for a long time, record the variation of main shaft bearing turn error, can detect the precision stability of measured bearing, for determining of bearing geometric parameter, the selection of lubricating system and pretightning force provides reference.Measure the temperature of bearing outer ring and compare with room temperature, can obtain the temperature rise of different working condition lower bearings, the acceleration signal of analysis axis bearing outer-ring, can lose efficacy and be analyzed the early stage precision of bearing.
The novel bearing precision property proving installation that the utility model provides has the following advantages:
(1) in the test unit that the utility model provides, drive servomotor and main shaft are individually fixed in two different frames and carry out transmission with flexible clutch, reduce to greatest extent the interference of servomotor to spindle operation, improve the reliability of test data.
(2) in the test unit that the utility model provides, rear-end of spindle adopts constant pressure preloading device, can by kind or the quantity of changing spring used, change the pretightning force of measured bearing according to testing requirements, realizes the level pressure pretension to measured bearing.
(3), in the test unit that the utility model provides, rear-end of spindle adopts a pair of precision corner contact ball bearing to support, and can improve running accuracy and the rigidity of main shaft, further reduces the impact of servomotor on measured bearing.
(4) in the test unit that the utility model provides, in main shaft housing and measured bearing cooperation place, along the circumferential direction be processed with four uniform radial direction through hole, wherein three mounting temperature sensors, an installation acceleration transducer, temperature and the acceleration signal of test bearing outer ring respectively.
(5) in the test unit that the utility model provides, adopt the temperature sensor with radial compaction structure, the outer ring close contact that also can guarantee temperature sensor and measured bearing under the condition of extraneous vibration is being arranged, improve temperature measurement accuracy.
(6) in the test unit that the utility model provides, front-end of spindle is equipped with two precise displacement sensors that are arranged symmetrically with the air plug gauge radial displacement, process with two-point method the displacement data of adopting, can separate in real time the shape error that obtains main shaft and the turn error of bearing, carry out long running test, record the variation of main shaft bearing turn error, can detect the precision stability of measured bearing.
(7) in the test unit that the utility model provides, be processed with the threaded hole for the setting-up eccentricity mandrel on described mandrel, according to testing requirements, process different eccentric mandrels, realize main shaft diameter to quantitative loading.
(8) in the test unit that the utility model provides, can select respectively oil spray lubrication and grease lubrication to lubricate measured bearing, meet different test demands.
The novel bearing precision property proving installation that the utility model provides adopts following critical piece:
1. test angles contact ball bearing: ZYSB7008C, bearing bore diameter 40mm, axle grinds science and technology.
2. strut angle contact ball bearing: ZYSB7007C, bearing bore diameter 35mm, axle grinds science and technology.
3. driving servomotor: HF-SP352, Mitsubishi.
4. servo-driver: MR-J3-350A, Mitsubishi.
5. special construction armoured Pt thermal resistance temperature sensor: WZPK-191CT, Xi'an Zhong Han instrument and meter for automation company limited.
6. precise displacement sensor: probe: rice iridium capacitance type sensor (CS05)
Fore-lying device: rice iridium DL6500 integrated preamplifier, Germany's rice iridium.
7. acceleration transducer: B& K4518-003, Denmark B& K.
8. temperature data collecting system: Yokogawa MA100 data acquisition system (DAS), Shanghai Yokogawa International Trading Company Ltd.
9. acceleration, displacement data acquisition system: B& K3053-B-120, Denmark B& K.
The foregoing is only a kind of embodiment of the present utility model, it not whole or unique embodiment, the conversion of any equivalence that those of ordinary skills take technical solutions of the utility model by reading the utility model instructions, be claim of the present utility model and contain.

Claims (10)

1. a bearing accuracy performance testing device, it is characterized in that: comprise main shaft and motor, motor is arranged on the first frame, and main shaft is fixed on the second frame by the main shaft housing (3) that is set in its outside; The rear end of main shaft is fixedly connected with the output shaft of motor; At the front end of main shaft, the inside of main shaft housing (3) is provided with measured bearing (1); Upper at main shaft housing (3), on the face that main shaft housing (3) matches with measured bearing (1), offer for the radial direction through hole of acceleration transducer (2) and temperature sensor (12) is installed; The part that front-end of spindle stretches out main shaft housing (3) is equipped with for measuring the displacement transducer of front-end of spindle diameter run-out.
2. bearing accuracy performance testing device as claimed in claim 1, it is characterized in that: described rear-end of spindle is set with the pre-tightening apparatus that makes measured bearing (1) level pressure pretension.
3. bearing accuracy performance testing device as claimed in claim 2, it is characterized in that: described pre-tightening apparatus comprises pair of horns contact ball bearing (6), be set with bearing seat (5) on angular contact ball bearing (6), between bearing seat (5) and main shaft housing (3), also be provided with linear bearing (9); Be fixed with preloading spring (4) on the front end face of bearing seat (5), the other end of preloading spring (4) is fixedly connected with main shaft housing (3) by thrust plate (13).
4. bearing accuracy performance testing device as claimed in claim 1, it is characterized in that: offer four circumferential equally distributed radial direction through hole on described main shaft housing (3), wherein three are used for mounting temperature sensor (12), and one is used for installing acceleration transducer (2); Described temperature sensor (12) directly is fixedly connected with the outer ring of measured bearing with acceleration transducer (2).
5. bearing accuracy performance testing device as claimed in claim 4, it is characterized in that: have in the hollow bolt (125) in hole in the middle of described temperature sensor (12) is arranged on, by mesopore bolt (125), temperature sensor (12) is fixed on main shaft housing (3); Holddown spring (122) is installed between temperature sensor and hollow bolt (125), and the spring stop bit point (121) that an end of holddown spring (122) is fixed on below temperature sensor (12) is upper, and the other end is fixed on the lower end of hollow bolt (125); The upper end of temperature sensor (12) is connected with output signal line (124).
6. bearing accuracy performance testing device as claimed in claim 1, it is characterized in that: described main shaft comprises main shaft mandrel (10), the front end of main shaft mandrel (10) is processed with the threaded hole for setting-up eccentricity mandrel (11); The rear end of main shaft mandrel (10) is fixedly connected with the output shaft of motor.
7. bearing accuracy performance testing device as described as claim 1 or 6, it is characterized in that: the rear end of described main shaft is fixedly connected with the output shaft of motor by flexible clutch (7).
8. bearing accuracy performance testing device as claimed in claim 6 is characterized in that: in the threaded hole of described main shaft mandrel (10) front end, be equipped with for to main shaft diameter to the eccentric mandrel (11) that applies quantitative load.
9. bearing accuracy performance testing device as claimed in claim 1, it is characterized in that: described front-end of spindle stretches out the part of main shaft housing (3), and 180 degree of being separated by a circumferential direction are symmetrically installed with two displacement transducers (S1, S2).
10. bearing accuracy performance testing device as claimed in claim 1, it is characterized in that: described motor is servomotor (8).
CN2013203229371U 2013-06-05 2013-06-05 Bearing precision performance testing device Expired - Fee Related CN203337382U (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103926078A (en) * 2014-04-29 2014-07-16 洛阳轴研科技股份有限公司 Test equipment for testing precise micro bearing axial rigidity
CN104806646A (en) * 2015-04-28 2015-07-29 上海大学 Rolling bearing supporting device capable of automatically controlling vibration and pretightening force
CN107843431A (en) * 2017-10-25 2018-03-27 西南交通大学 A kind of contact axle box bearing sensor
CN108871778A (en) * 2018-08-06 2018-11-23 浙江优特轴承有限公司 Testing agency for the exportable bearing block of data
CN109870304A (en) * 2019-03-19 2019-06-11 上海航天动力科技工程有限公司 A kind of temperature sensor that energy vibration measuring is dynamic
CN111595499A (en) * 2020-05-27 2020-08-28 湖北新火炬科技有限公司 Method for measuring and correcting pre-tightening force of hub bearing

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103926078A (en) * 2014-04-29 2014-07-16 洛阳轴研科技股份有限公司 Test equipment for testing precise micro bearing axial rigidity
CN104806646A (en) * 2015-04-28 2015-07-29 上海大学 Rolling bearing supporting device capable of automatically controlling vibration and pretightening force
CN104806646B (en) * 2015-04-28 2017-06-23 上海大学 A kind of active control vibration and the rolling bearing supporting arrangement of pretightning force
CN107843431A (en) * 2017-10-25 2018-03-27 西南交通大学 A kind of contact axle box bearing sensor
CN108871778A (en) * 2018-08-06 2018-11-23 浙江优特轴承有限公司 Testing agency for the exportable bearing block of data
CN108871778B (en) * 2018-08-06 2023-09-19 浙江优特轴承有限公司 Detection mechanism for bearing pedestal capable of outputting data
CN109870304A (en) * 2019-03-19 2019-06-11 上海航天动力科技工程有限公司 A kind of temperature sensor that energy vibration measuring is dynamic
CN111595499A (en) * 2020-05-27 2020-08-28 湖北新火炬科技有限公司 Method for measuring and correcting pre-tightening force of hub bearing

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131211

Termination date: 20190605

CF01 Termination of patent right due to non-payment of annual fee