CN209841388U - Bearing test bed - Google Patents
Bearing test bed Download PDFInfo
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- CN209841388U CN209841388U CN201920772006.9U CN201920772006U CN209841388U CN 209841388 U CN209841388 U CN 209841388U CN 201920772006 U CN201920772006 U CN 201920772006U CN 209841388 U CN209841388 U CN 209841388U
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Abstract
The application provides a bearing test bench, the test bench include loading mechanism, for install on loading mechanism for the drag system that experimental rotor provided power, loading mechanism include the support bearing mount pad that two tandem arrangements set up, install two support bearings on two support bearing mount pads respectively, locate two support bearing mount pads between, install experimental bearing mount pad on experimental bearing mount pad experimental bearing on, pass two support bearings and experimental bearing's experimental rotor, experimental bearing mount pad on be provided with static loading point and at least one dynamic loading point, static loading point be connected with a hydraulic loading vibration isolation device, dynamic loading point be connected with a dynamic vibration exciter. The bearing test bed can enable dynamic and static loads to be directly applied to a tested bearing seat, the response characteristic of a test bearing under dynamic and static coupling loads is tested, and the load borne by the tested bearing can be accurately measured.
Description
Technical Field
The application relates to a bearing test bed, in particular to a bearing test bed with dynamic and static coupling loading functions.
Background
The bearing test bed is mainly used for carrying out test investigation on the characteristic performance of a certain bearing and collecting key operation data of the bearing. The main characteristic of this type of test bearing is that the vibration force transmitted by the rotor to the bearing support structure during the operation of the unit can be reduced or attenuated to a certain extent. At present, in the patent with application number 201920006854.9, a loading mechanism is connected with a test rotor through a support bearing, a tested bearing is fixed on a pedestal through a bearing seat, and the two dynamic vibration exciters are fixed and obliquely pulled above the loading mechanism to test the dynamic response characteristic of the bearing under dynamic load. In this way, dynamic load is indirectly applied to the measured bearing through the supporting bearings at the two ends of the rotor, so that the load borne by the measured bearing cannot be accurately measured.
Disclosure of Invention
The technical problem that this application will be solved provides a bearing test bench.
In order to solve the technical problem, the application provides a bearing test bed, the test bed include loading mechanism, for installing the dragging system that provides power for experimental rotor on loading mechanism, loading mechanism include two back and forth arrangement's support bearing mount pad, install two support bearings on two support bearing mount pads respectively, locate experimental bearing mount pad between two support bearing mount pads, install experimental bearing on the experimental bearing mount pad, pass two support bearings and experimental rotor of bearing, experimental bearing mount pad on be provided with static loading point and at least one dynamic loading point, static loading point be connected with a hydraulic loading vibration isolation device, dynamic loading point be connected with a dynamic vibration exciter.
Preferably, the test bed further comprises a gantry, the gantry comprises a beam, the test bed further comprises supporting mechanisms located on two sides of the beam and a base frame arranged below the gantry, the loading mechanism and the dragging system are arranged on the base frame, the upper end of the dynamic vibration exciter is connected to the beam, and the lower end of the dynamic vibration exciter is connected to the dynamic loading point.
Preferably, the hydraulic loading vibration isolation device comprises a hydraulic cylinder for applying a static load to the loading mechanism, an oil-gas spring for offsetting displacement and a force sensor for controlling the output force of the hydraulic cylinder, the hydraulic cylinder is connected to the cross beam through a joint bearing, the lower end part of the force sensor is connected to the static loading point, and the oil-gas spring is positioned between the joint bearing and the hydraulic cylinder.
Preferably, the loading mechanism is provided with two dynamic loading points, the two dynamic loading points are positioned at the upper part of the loading mechanism, the output end of the dynamic vibration exciter is connected with the loading mechanism through an excitation screw rod, and the excitation screw rod of the dynamic vibration exciter forms an angle of 45 degrees with the horizontal direction.
Preferably, the beam is provided with two fixing holders, and the two dynamic vibration exciters are respectively mounted on the beam through the fixing holders.
Preferably, a plurality of dampers are arranged on the side surfaces of the base frame, the upper ends of the dampers are connected to the side walls of the base frame, and the lower ends of the dampers are connected to the ground.
Preferably, a plurality of rubber vibration isolators are arranged between the base frame and the dragging system.
Preferably, the lower side of the base frame is also provided with a plurality of machine tool sizing blocks.
The bearing test bed can enable dynamic and static loads to be directly applied to a tested bearing seat, the response characteristic of a test bearing under dynamic and static coupling loads is tested, and the load borne by the tested bearing can be accurately measured.
Drawings
Fig. 1 is a schematic structural diagram of a bearing test bed.
Fig. 2 is a schematic structural diagram of a loading device according to the present application.
Wherein: 1. a dragging system; 2. a loading mechanism; 3. a dynamic vibration exciter; 4. fixing the clamp seat; 5. exciting a screw rod; 6. a hydraulic cylinder; 7. a hydro-pneumatic spring; 8. a force sensor; 9. a rubber vibration isolator; 10. a machine tool sizing block; 11. a damper; 12. a base frame; 13. a gantry; 100. a support bearing mount; 200. a test bearing mounting seat; 300. testing the rotor; 101. a support bearing; 201. testing the bearing; 202. a dynamic loading point; 203. a static load point.
Detailed Description
The present application is further described below in conjunction with the following figures and specific examples to enable those skilled in the art to better understand the present application and to practice it, but the examples are not intended to limit the present application.
As shown in the figure, the application provides a bearing test bed, the test bed comprises a loading mechanism 2 and a dragging system for providing power for a test rotor arranged on the loading mechanism, as shown in fig. 2, the loading mechanism 2 includes two supporting bearing mounting seats 100 arranged in tandem, two supporting bearings 101 respectively mounted on the two supporting bearing mounting seats 100, a testing bearing mounting seat 200 arranged between the two supporting bearing mounting seats 100, a testing bearing 201 mounted on the testing bearing mounting seat 200, and a testing rotor 300 passing through the two supporting bearings 101 and the testing bearing 201, the test bearing mount 200 is provided with a static load point 203 and at least one dynamic load point 202, the static loading point 203 is connected with a hydraulic loading vibration isolation device, and the dynamic loading point 202 is connected with a dynamic vibration exciter 3. The bearing test bed directly applies dynamic and static loads to a bearing mounting seat to be tested, and tests the response characteristics of the bearing under dynamic and static coupling loads. The load born by the measured bearing can be accurately measured.
As shown in fig. 1, the test bed further includes a gantry 13, the gantry 13 includes a beam, the test bed further includes supporting mechanisms located at two sides of the beam, and a base frame 12 disposed below the supporting mechanisms, the loading mechanism 2 and the dragging system 1 are disposed on the base frame 12, an upper end of the dynamic vibration exciter 3 is connected to the beam, and a lower end of the dynamic vibration exciter 3 is connected to the dynamic loading point 202.
The hydraulic loading vibration isolation device comprises a hydraulic cylinder 6, an oil-gas spring 7 and a force sensor 8, wherein the hydraulic cylinder 6 is used for applying static load to the loading mechanism 2, the hydraulic cylinder 6 is connected to the cross beam through a joint bearing, the static load is applied to the loading mechanism 2, and the output force of the hydraulic cylinder 6 is accurately controlled through the force sensor 8. Under the working state, because the hydraulic oil has no compressibility, the displacement generated by the loading mechanism 2 under the action of the dynamic force of the system cannot be overcome, so that the displacement generated in the running process of the system is offset by the hydro-pneumatic spring 7, and the buffering, vibration isolation and weight compensation are realized.
The loading mechanism 2 is provided with two dynamic loading points 202, the two dynamic vibration exciters 3 are symmetrically and obliquely pulled on the loading mechanism 2, the output ends of the dynamic vibration exciters 3 are connected with the loading mechanism 2 through vibration exciting screws 5, and the vibration exciting screws 5 of the dynamic vibration exciters 3 form an angle of 45 degrees with the horizontal direction. The beam is provided with two fixing clamping seats 4, and the two dynamic vibration exciters 3 are respectively arranged on the beam through the fixing clamping seats 4. The force output of each dynamic vibration exciter 3 is adjusted, and the synthesis of force within the range of 360 degrees can be realized.
In order to prevent the exciting force generated by the dynamic vibration exciter 3 from being transmitted to the foundation and the base frame 12 through the portal frame 13, the dynamic test of the system is interfered, and the transmission of the vibration to the foundation is weakened by installing a vibration isolation pad below the base frame 12 of the test bed.
Because the machine tool sizing block 10 has the capability of bearing the transverse force, the shaking of the test system caused by the transverse force can be effectively reduced, so the test system selects the machine tool sizing block 10 to carry out vibration isolation, and in addition, the damper 11 is arranged around the base frame 12 to control the stability of the base frame 12, so the deflection of the system caused by the coupling force transmitted during the operation of the system is prevented.
To prevent vibrations generated by the operation of the motor from propagating towards the test stand base frame 12 and interfering with the response of the vibration pickup system to the dynamic excitation, vibration isolators are installed beneath the main traction motor, as shown in fig. 1. Four sets of rubber vibration isolators 99 are selected in the system, the vibration isolation frequency is 8-10Hz, the single rubber vibration isolator bears 200kg, the low-frequency shaking is small, and a certain unbalance loading force can be borne.
The above-described embodiments are merely preferred embodiments for fully illustrating the present application, and the scope of the present application is not limited thereto. The equivalent substitution or change made by the person skilled in the art on the basis of the present application is within the protection scope of the present application. The protection scope of this application is subject to the claims.
Claims (8)
1. A bearing test bed is characterized in that,
the test bed comprises a loading mechanism and a dragging system which is arranged on the loading mechanism and provides power for a test rotor,
the loading mechanism comprises two supporting bearing mounting seats which are arranged in tandem, two supporting bearings which are respectively arranged on the two supporting bearing mounting seats, a test bearing mounting seat which is arranged between the two supporting bearing mounting seats, a test bearing which is arranged on the test bearing mounting seat, and a test rotor which passes through the two supporting bearings and the test bearing,
the test bearing mounting seat is provided with a static loading point and at least one dynamic loading point,
the static loading point is connected with a hydraulic loading vibration isolation device,
the dynamic loading point is connected with a dynamic vibration exciter.
2. A bearing test stand according to claim 1,
the test bed also comprises a portal frame, the portal frame comprises a beam,
the test bed also comprises supporting mechanisms positioned at two sides of the beam and a base frame arranged below the portal frame, the loading mechanism and the dragging system are arranged on the base frame,
the upper end of the dynamic vibration exciter is connected to the beam, and the lower end of the dynamic vibration exciter is connected to the dynamic loading point.
3. A bearing test stand according to claim 2,
the hydraulic loading vibration isolation device comprises a hydraulic cylinder, an oil-gas spring and a force sensor, wherein the hydraulic cylinder is used for applying static load to a loading mechanism, the oil-gas spring is used for offsetting displacement, the force sensor is used for controlling the output force of the hydraulic cylinder, the hydraulic cylinder is connected to a cross beam through a joint bearing, the lower end part of the force sensor is connected to the static loading point, and the oil-gas spring is positioned between the joint bearing and the hydraulic cylinder.
4. A bearing test stand according to claim 2,
the loading mechanism is provided with two dynamic loading points, the two dynamic loading points are positioned at the upper part of the loading mechanism, the output end of the dynamic vibration exciter is connected with the loading mechanism through a vibration exciting screw rod, and the vibration exciting screw rod of the dynamic vibration exciter forms an angle of 45 degrees with the horizontal direction.
5. A bearing test bed as claimed in claim 4, wherein the beam is provided with two fixing holders, and the two dynamic vibration exciters are respectively mounted on the beam through the fixing holders.
6. A bearing test stand according to claim 2 wherein the side of the base frame is provided with a plurality of dampers, the upper ends of the dampers being connected to the side walls of the base frame and the lower ends of the dampers being connected to the ground.
7. The bearing test stand of claim 2, wherein a plurality of rubber isolators are disposed between the base frame and the drive system.
8. A bearing test stand according to claim 6 wherein the underside of the base frame is further provided with a plurality of machine bed shoes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920772006.9U CN209841388U (en) | 2019-05-27 | 2019-05-27 | Bearing test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920772006.9U CN209841388U (en) | 2019-05-27 | 2019-05-27 | Bearing test bed |
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| Publication Number | Publication Date |
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| CN209841388U true CN209841388U (en) | 2019-12-24 |
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| CN201920772006.9U Active CN209841388U (en) | 2019-05-27 | 2019-05-27 | Bearing test bed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340596A (en) * | 2021-04-28 | 2021-09-03 | 西安交通大学 | Four-oil-cavity dynamic and static pressure bearing dynamic performance test experiment table |
| CN113776830A (en) * | 2021-08-30 | 2021-12-10 | 上海和兰透平动力技术有限公司 | Hydraulic loading device of tilting-pad sliding bearing test bed |
-
2019
- 2019-05-27 CN CN201920772006.9U patent/CN209841388U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340596A (en) * | 2021-04-28 | 2021-09-03 | 西安交通大学 | Four-oil-cavity dynamic and static pressure bearing dynamic performance test experiment table |
| CN113776830A (en) * | 2021-08-30 | 2021-12-10 | 上海和兰透平动力技术有限公司 | Hydraulic loading device of tilting-pad sliding bearing test bed |
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