CN106769034B - Bearing accelerated life test bed - Google Patents
Bearing accelerated life test bed Download PDFInfo
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- CN106769034B CN106769034B CN201611082445.4A CN201611082445A CN106769034B CN 106769034 B CN106769034 B CN 106769034B CN 201611082445 A CN201611082445 A CN 201611082445A CN 106769034 B CN106769034 B CN 106769034B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The accelerated life test bed for the bearing comprises a turntable, a rotating shaft, a bearing mounting seat, a driving motor, a force application mechanism and a data acquisition and control unit; the force application mechanism comprises two axial force application mechanisms and a radial force application mechanism, and the two axial force application mechanisms have the same structure and are symmetrically arranged by taking the rotating shaft as a central line; each axial force application mechanism comprises an axial force application mechanism driver, an axial force application mechanism tension pressure sensor and an axial force application mechanism force application wheel; the radial force application mechanism comprises a radial force application mechanism driver, a radial force application mechanism pull pressure sensor and a radial force application mechanism force application wheel; and a three-way acceleration sensor and a temperature sensor are arranged on the bearing sleeve. The invention can simultaneously carry out accelerated life test on two bearings under the same condition, so that the life degradation process of the bearings can be more accurately simulated; the consistency of the collected accelerated life test data of the two groups of bearings is ensured, and a more reliable test basis is provided for the predictive maintenance of the bearings.
Description
Technical Field
The invention relates to a bearing accelerated life test bed, and belongs to the technical field of performance simulation tests of key parts of rotary machinery.
Background
The bearing is used as a key component in the rotary mechanical system, is one of important factors causing the failure of the rotary mechanical system, and the accelerated life test of the bearing is helpful for knowing the life degradation rule of the bearing so as to improve the accuracy of predictive maintenance of the rotary mechanical system.
In most applications, the bearing often bears both radial load and axial load, and the loads in both directions act simultaneously to determine the life of the bearing. The existing bearing life accelerating device simulates the life degradation process of the bearing only by applying radial load to the bearing to be tested, and has a certain difference from the actual stress condition of the bearing; meanwhile, the existing bearing life accelerating device only carries out an accelerating test on a single bearing, when repeated verification tests are required to be carried out on test data, more time cost and test cost are required to be paid, and consistency of the two tests is difficult to guarantee.
Disclosure of Invention
The invention aims to provide a bearing accelerated life test bed, which can more accurately simulate the life degradation process of a bearing, can simultaneously carry out accelerated life tests on two bearings under the same condition, ensures the consistency of collected two groups of bearing accelerated life test data, and provides more reliable test basis for predictive maintenance of the bearings.
The technical scheme of the invention is as follows:
the utility model provides a bearing accelerated life test bench, includes frame, carousel, pivot, bearing mount pad, driving motor and forcing mechanism, its characterized in that: the test bed also comprises a data acquisition and control unit, wherein the force application mechanism comprises two axial force application mechanisms and a radial force application mechanism, and the two axial force application mechanisms have the same structure and are symmetrically arranged by taking a rotating shaft as a central line; each axial force application mechanism comprises an axial force application mechanism base, an axial force application mechanism driver, an axial force application mechanism tension pressure sensor, an axial force application mechanism force application frame and an axial force application mechanism force application wheel, wherein the axial force application mechanism force application wheel is arranged on the axial force application mechanism force application frame; the axial force application mechanism driver is connected with an axial force application mechanism force application frame through an axial force application mechanism pull pressure sensor, and the axial force application mechanism force application frame is arranged on an axial force application mechanism base through an axial force application mechanism force application frame guide rail; the radial force application mechanism comprises a radial force application mechanism driver, a radial force application mechanism tension pressure sensor and a radial force application mechanism force application wheel, and the force application wheel is arranged on a radial force application mechanism force application frame; the radial force application mechanism driver is connected with a radial force application mechanism force application frame through a radial force application mechanism pull pressure sensor, the radial force application mechanism force application frame is arranged on a radial force application mechanism base through a guide rail, and the radial force application mechanism base is fixedly connected with a shaft axial force application mechanism base of the axial force application mechanism; the circle center of the force application wheel of the radial force application mechanism and the circle center of the force application wheel of the axial force application mechanism are on the same horizontal plane; the axial force application mechanism base is connected with the machine base through a moving mechanism guide rail and is connected with the moving mechanism motor through a moving mechanism screw rod; the bearing housing of the bearing seat is provided with a three-way acceleration sensor and a temperature sensor, the data acquisition and control unit is respectively and electrically connected with the driving motor, the moving mechanism motor, the axial force application mechanism driver, the axial force application mechanism pull pressure sensor, the radial force application mechanism driver and the radial force application mechanism pull pressure sensor through signal wires, and acquires pressure signals of the axial force application mechanism pull pressure sensor and the radial force application mechanism pull pressure sensor to respectively control the rotating speed of the driving motor, the rotating angle of the moving mechanism motor, the output force of the axial force application mechanism driver and the output force of the radial force application mechanism driver.
The invention is characterized in that: each axial force application mechanism further comprises a position adjusting device, and the position adjusting device comprises an axial force application mechanism sliding table, an axial force application mechanism screw rod and an axial force application mechanism motor; the guide rail of the force application frame of the axial force application mechanism and the driver of the axial force application mechanism are fixed on the sliding table of the axial force application mechanism, the upper surface of the sliding table of the axial force application mechanism is connected with the output shaft of the motor of the axial force application mechanism through the screw rod of the axial force application mechanism, and the lower surface of the sliding table of the axial force application mechanism is arranged on the base of the axial force application mechanism through the guide rail.
Yet another technical feature of the present invention is: the test bed also comprises an adjusting mechanism which enables the circle center of the force application wheel of the radial force application mechanism, the circle center of the force application wheel of the axial force application mechanism and the circle center of the rotary table to be kept at the same horizontal plane, and the adjusting mechanism is arranged between the axial force application mechanism base and between the moving mechanism base and the machine base; the adjusting mechanism consists of a cushion block, a backing plate and an adjusting bolt.
The invention is also characterized in that: the method is characterized in that: the rotating shaft is connected with the driving motor through a belt. The axial force application mechanism driver and the radial force application mechanism driver adopt hydraulic cylinders or linear motors.
Compared with the prior art, the invention has the following advantages and outstanding technical effects: (1) according to the invention, radial load and axial load can be applied to two bearings dynamically at the same time, and the service life degradation process of the bearings can be simulated more accurately; (2) the force transmission structure of the turntable and the rotating shaft is adopted, and meanwhile, the accelerated life test of the same condition is carried out on the two bearings, so that the consistency of the collected accelerated life test data of the two groups of bearings is ensured, the two groups of data are mutually verified, and a more reliable test basis is provided for the predictive maintenance of the bearings. (3) The bearing to be tested of the test stand is connected with the bearing mounting seat through the bearing sleeve, and when the bearings of different types are required to be tested, only the bearing sleeve and the rotating shaft matched with the bearings need to be replaced, so that the universality of the test stand is improved.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
FIG. 2 is a schematic view of the mounting location of the monitoring sensor of the bearing of the present invention.
Fig. 3 is a control block diagram of the radial force loading of the present invention.
Fig. 4 is a control block diagram of the axial force loading of the present invention.
In the figure: 1-a stand; 2-a moving mechanism base; 3-a moving mechanism guide rail; 4-a radial force mechanism driver; 5-moving a mechanism screw; 6, pulling the pressure sensor by a radial force application mechanism; 7-a force application frame of a radial force application mechanism; 8-a radial force application mechanism base; 9-a force application wheel of a radial force application mechanism; 10-rotating shaft; 11-a turntable; 12-an axial force application mechanism force application wheel; 13-an axial force application mechanism force application frame; 14-pulling the pressure sensor by the axial force application mechanism; 15-a bearing mounting base; 16-bearing sleeve; 17-a belt; 18-driving a motor; 19-an inverted T-shaped slot; 20-an axial force mechanism driver; 21-an axial force application mechanism force application frame guide rail; 22-an axial force application mechanism sliding table; 23-backing plate; 24-a movement mechanism motor; 25-an axial force application mechanism screw rod; 26-an axial force application mechanism motor; 27-an axial force application mechanism base; 28-cushion blocks; 29-a three-way acceleration sensor; 30-a temperature sensor; 31-bearing.
Detailed Description
The structure, principle and operation of the present invention will be further described with reference to the accompanying drawings
As shown in fig. 1, the bearing accelerated life test stand provided by the invention comprises a turntable 11, a rotating shaft 10, a driving motor 18, bearing mounting seats 15 arranged at two ends of the rotating shaft 10, two axial force applying mechanisms, a radial force applying mechanism and a data acquisition and control unit; each axial force application mechanism comprises an axial force application mechanism base 27, an axial force application mechanism driver 20, an axial force application mechanism tension pressure sensor 14 and an axial force application mechanism force application wheel 12, wherein the axial force application mechanism force application wheel is arranged on an axial force application mechanism force application frame 13; the axial force applying mechanism driver 20 is connected to the axial force applying mechanism force applying frame 13 through the axial force applying mechanism pull pressure sensor 14, and the axial force applying mechanism force applying frame 13 is mounted on the axial force applying mechanism base 27 through the axial force applying mechanism force applying frame guide rail 21.
The radial force application mechanism comprises a radial force application mechanism driver 4, a radial force application mechanism pull pressure sensor 6, a radial force application mechanism force application frame 7 and a radial force application mechanism force application wheel 9, wherein the radial force application mechanism driver 4 is connected with the radial force application mechanism force application frame 7 through the radial force application mechanism pull pressure sensor 6, the radial force application mechanism force application wheel 9 is arranged on the radial force application mechanism force application frame 7 through a radial force application mechanism rotating shaft, the radial force application mechanism force application frame 7 is arranged on an axial force application mechanism base 8 through a guide rail, and the axial force application mechanism base 8 is fixedly connected with an axial force application mechanism base 27 of an axial force application mechanism. The axial force mechanism driver 20 and the radial force mechanism driver 4 may employ hydraulic cylinders or linear motors.
The circle center of the force application wheel 9 of the radial force application mechanism and the circle center of the force application wheel 12 of the axial force application mechanism are on the same horizontal plane; the axial force application mechanism base 27 is connected with the machine base 1 through the moving mechanism guide rail 3, and the axial force application mechanism base 27 is connected with the moving mechanism motor 24 through the moving mechanism screw 5. The axial force application mechanism driver 20 and the radial force application mechanism driver 4 employ hydraulic cylinders or linear motors.
As shown in fig. 2, a bearing 31 to be tested is mounted on a bearing mounting seat 15 through a bearing sleeve 16, an outer ring of the bearing 31 is tightly matched with an inner ring of the bearing sleeve 16, the inner ring of the bearing 31 is tightly matched with a rotating shaft 10, and an outer ring of the bearing sleeve 16 is fixed on the bearing mounting seat 15 through bolts; the three-way acceleration sensor 29 and the temperature sensor 30 are arranged on the bearing sleeve of the bearing seat, so that when the bearings with different types are required to be tested, only the bearing sleeve and the rotating shaft matched with the bearings need to be replaced, and the universality of the test bed is improved.
The data acquisition and control unit is electrically connected with the driving motor 18, the moving mechanism motor 24, the axial force application mechanism driver 20, the axial force application mechanism pull pressure sensor 14, the radial force application mechanism driver 4 and the radial force application mechanism pull pressure sensor 6 through signal wires respectively, acquires output pressure signals of the axial force application mechanism pull pressure sensor 14 and the radial force application mechanism pull pressure sensor 6, and respectively controls the rotating speed of the driving motor 18, the rotating angle of the moving mechanism motor 24, the output force of the axial force application mechanism driver 20 and the output force of the radial force application mechanism driver 4.
The axial force application mechanism further comprises a position adjusting device, the adjusting device comprises an axial force application mechanism sliding table 22, an axial force application mechanism screw rod 25 and an axial force application mechanism motor 26, an axial force application mechanism force application frame guide rail 21 and an axial force application mechanism driver 20 are fixed on the axial force application mechanism sliding table 22, the upper surface of the axial force application mechanism sliding table 22 is connected with the axial force application mechanism motor 26 through the axial force application mechanism screw rod 25, and the lower surface of the axial force application mechanism sliding table 22 is installed on an axial force application mechanism base 27 through the guide rail.
The invention also comprises an adjusting mechanism which keeps the circle center of the force applying wheel 9 of the radial force applying mechanism, the circle center of the force applying wheel 12 of the axial force applying mechanism and the circle center of the rotary table 11 at the same horizontal plane, and the adjusting mechanism is arranged between the axial force applying mechanism base 8 and the axial force applying mechanism base 27 and between the moving mechanism base 2 and the machine base 1.
The rotating shaft 10 is connected with the driving motor 18 through the belt 17, the driving motor 18 drives the rotating shaft 10 through the belt 17, and the driving motor 18 can be prevented from generating axial force on the rotating shaft 10, so that the axial force borne by the bearing 31 to be tested is ensured to come from the axial force applying mechanism driver 20 completely.
The principle and the working process of the invention are as follows:
selecting a matched rotary table 11 and a rotary shaft 10 according to the size of a bearing 31 to be tested, wherein the rotary table 11 is arranged at the central position of the rotary shaft 10, and adjusting mechanisms arranged between an axial force application mechanism base 8 and an axial force application mechanism base 27 and between a moving mechanism base 2 and a machine base 1 are adjusted to ensure that the circle centers of a force application wheel 9 of a radial force application mechanism, the circle centers of force application wheels 12 of the axial force application mechanism and the circle center of the rotary table 11 are kept at the same horizontal plane; the moving mechanism motor 24 drives the moving mechanism screw 5 to rotate so as to drive the axial force application mechanism base 27 to move along the moving mechanism guide rail 3, and when the radial force application mechanism force application wheel 9 and the turntable 11 are positioned on the same vertical plane, the moving mechanism motor 24 stops rotating and keeps a self-locking state; the driving motor 18 drives the rotating shaft 10 through the belt 17 according to the test rotating speed requirement of a user so as to drive the turntable 11 to rotate; the data acquisition and control unit controls the output force of the radial force application mechanism driver 4 and the output force of the axial force application mechanism driver 20 in real time according to the change curves of the radial loading force and the axial loading force input by a user, and applies radial force and axial force to the turntable 11 through the radial force application mechanism force application wheel 9 and the axial force application mechanism force application wheel 12 respectively, so that the radial force and the axial force born by the bearing to be tested are changed according to the user requirement, and various working conditions of the running of the rotary mechanical bearing are simulated.
As shown in fig. 3 and 4, during the test, the radial force application mechanism driver 4 and the radial force application mechanism pull pressure sensor 6 form closed-loop control, the axial force application mechanism driver 20 and the axial force application mechanism pull pressure sensor 14 form closed-loop control, and the data acquisition and control unit respectively acquires vibration signals and temperature signals in the accelerated life test process of the bearing 31 through the three-way acceleration sensor 29 and the temperature sensor 30, so that test data required for researching the life degradation process of the bearing 31 are obtained, and a more reliable test basis is provided for predictability maintenance of a rotary mechanical system.
Claims (5)
1. The utility model provides a bearing accelerated life test bench, includes frame (1), carousel (11), pivot (10), bearing (31), bearing mount pad (15), driving motor (18) and forcing mechanism, its characterized in that: the test bed also comprises a data acquisition and control unit, wherein the force application mechanism comprises two axial force application mechanisms and a radial force application mechanism, and the two axial force application mechanisms have the same structure and are symmetrically arranged by taking a rotating shaft as a central line; each axial force application mechanism comprises an axial force application mechanism base (27), an axial force application mechanism driver (20), an axial force application mechanism tension pressure sensor (14) and an axial force application mechanism force application wheel (12), wherein the axial force application mechanism force application wheel is arranged on an axial force application mechanism force application frame (13); the axial force application mechanism driver (20) is connected with the axial force application mechanism force application frame (13) through the axial force application mechanism tension pressure sensor (14), and the axial force application mechanism force application frame (13) is arranged on the axial force application mechanism base (27) through the axial force application mechanism force application frame guide rail (21);
the radial force application mechanism comprises a radial force application mechanism driver (4), a radial force application mechanism tension pressure sensor (6) and a radial force application mechanism force application wheel (9), and the radial force application mechanism force application wheel is arranged on a radial force application mechanism force application frame (7); the radial force application mechanism driver (4) is connected with a radial force application mechanism force application frame (7) through a radial force application mechanism pull pressure sensor (6), the radial force application mechanism force application frame (7) is arranged on a radial force application mechanism base (8) through a guide rail, and the radial force application mechanism base (8) is fixedly connected with an axial force application mechanism base (27) of an axial force application mechanism;
the circle center of the force application wheel (9) of the radial force application mechanism, the circle center of the force application wheel (12) of the axial force application mechanism and the circle center of the turntable (11) are on the same horizontal plane; the axial force application mechanism base (27) is connected with the machine base (1) through the moving mechanism guide rail (3), and the axial force application mechanism base (27) is connected with the moving mechanism motor (24) through the moving mechanism screw rod (5);
the test bed comprises an adjusting mechanism which enables the circle center of the force application wheel (9) of the radial force application mechanism, the circle center of the force application wheel (12) of the axial force application mechanism and the circle center of the rotary table (11) to be kept at the same horizontal plane, and the adjusting mechanism is arranged between the base (8) of the radial force application mechanism and the base (27) of the axial force application mechanism and between the base (2) of the moving mechanism and the base (1);
the three-way acceleration sensor (29) and the temperature sensor (30) are arranged on the bearing sleeve of the bearing mounting seat, the data acquisition and control unit is electrically connected with the driving motor (18), the moving mechanism motor (24), the axial force application mechanism driver (20), the axial force application mechanism pulling pressure sensor (14), the radial force application mechanism driver (4) and the radial force application mechanism pulling pressure sensor (6) through signal wires respectively, and acquires pressure signals of the axial force application mechanism pulling pressure sensor (14) and the radial force application mechanism pulling pressure sensor (6) and respectively controls the rotating speed of the driving motor (18), the rotating angle of the moving mechanism motor (24), the output force of the axial force application mechanism driver (20) and the output force of the radial force application mechanism driver (4).
2. The accelerated life test stand of claim 1, wherein: each axial force application mechanism further comprises a position adjusting device, and the position adjusting device comprises an axial force application mechanism sliding table (22), an axial force application mechanism screw rod (25) and an axial force application mechanism motor (26); the axial force application mechanism force application frame guide rail (21) and the axial force application mechanism driver (20) are fixed on an axial force application mechanism sliding table (22), the upper surface of the axial force application mechanism sliding table (22) is connected with an output shaft of an axial force application mechanism motor (26) through an axial force application mechanism screw rod (25), and the lower surface of the axial force application mechanism sliding table (22) is arranged on an axial force application mechanism base (27) through the guide rail.
3. The accelerated life test stand of claim 1, wherein: the adjusting mechanism consists of a cushion block (28), a base plate (23) and an adjusting bolt.
4. The accelerated life test stand of claim 1, wherein: the rotating shaft (10) is connected with the driving motor (18) through a belt (17).
5. The accelerated life test stand of claim 1, wherein: the axial force application mechanism driver (20) and the radial force application mechanism driver (4) adopt hydraulic cylinders or linear motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611082445.4A CN106769034B (en) | 2016-11-30 | 2016-11-30 | Bearing accelerated life test bed |
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| CN201611082445.4A CN106769034B (en) | 2016-11-30 | 2016-11-30 | Bearing accelerated life test bed |
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| CN106769034A CN106769034A (en) | 2017-05-31 |
| CN106769034B true CN106769034B (en) | 2023-06-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896310B (en) * | 2018-07-25 | 2020-05-08 | 北京卫星环境工程研究所 | Bearing multi-stress test system capable of simulating overturning moment |
| CN112557037B (en) * | 2020-11-30 | 2022-03-11 | 南京工业大学 | Accelerated life test method for wind power main shaft bearing model |
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