CN114018557A - Hoisting type universal rotor critical rotating speed testing device - Google Patents
Hoisting type universal rotor critical rotating speed testing device Download PDFInfo
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- CN114018557A CN114018557A CN202111294143.4A CN202111294143A CN114018557A CN 114018557 A CN114018557 A CN 114018557A CN 202111294143 A CN202111294143 A CN 202111294143A CN 114018557 A CN114018557 A CN 114018557A
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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
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Abstract
The invention relates to a hoisting type universal rotor critical rotating speed testing device which comprises a high-speed motor, a coupler, a bearing seat, a flange support and an equipment support, wherein an output shaft of the high-speed motor is connected with the coupler through a flexible connecting disc structure, the coupler is installed in the bearing seat through a high-speed bearing, the bearing seat is connected with the flange support through a circumferential vibration damper, and the flange support is fixed on the equipment support. By adopting the flexible connecting disc and the circumferential vibration damper structure, the invention can overcome the strong vibration generated by the rotor at the critical rotating speed during the overspeed experiment, thereby testing the mechanical safety performance of the rotor after passing the critical rotating speed.
Description
Technical Field
The invention relates to a hoisting type universal rotor rotating speed testing device, in particular to a rotating speed testing device for measuring and researching the influence and damage degree of radial and axial vibration generated by a rotor under the condition of passing through a critical rotating speed or far exceeding a working rotating speed on the mechanical property of the rotor.
Background
Different types of rotors, because of the difference in manufacturing processes, have deviations in the center of mass and the axis of rotation of the rotor during the manufacturing process, which results in vibrations of the rotor during rotation, which vibrations are very severe when the rotor reaches a certain rotational speed, called the critical rotational speed. The critical rotating speeds of different rotors are different, the same rotor has a plurality of critical rotating speeds, when the rotor passes through the critical rotating speeds, the rotor is in an unstable state, and the transverse vibration generated at the moment can be elastically recoverable or inelastically unrecoverable damage to the mechanical performance of the rotor. When the rotor is irrecoverably damaged, further eccentricity error is increased, and the dynamic balance of the rotor is damaged, which is a very dangerous accident for both the equipment using the rotor and personnel using the equipment.
Wherein the calculation and determination of the critical rotation speed are divided into discrete mass distribution and continuous mass distribution, and the result can be obtained by recursion by a transfer matrix method. In the case of uncertain critical rotor speed, the mechanical performance of the rotor can be tested by a test method of enlarging the speed range, for example, the working speed of a certain rotor needs 6000 rpm, and the degree of influence of the radial vibration on the mechanical structure of the rotor in the range from 3000 rpm to 12000 rpm can be tested.
Disclosure of Invention
In order to test and improve the mechanical installation performance of a rotor structure and avoid dangerous accidents during working, the invention provides a hoisting type universal rotor critical rotating speed testing device, which can ensure that a rotor can reach and pass through a critical rotating speed and the testing equipment works stably without being influenced by strong vibration of the rotor.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a critical rotational speed testing arrangement of general type rotor of hoist and mount formula, includes high-speed motor, shaft coupling, bearing frame, flange support, equipment support, high-speed motor's output shaft passes through flexible connection pad structural connection shaft coupling, the shaft coupling passes through high-speed bearing and installs in the bearing frame, be connected through circumference vibrations attenuator between bearing frame and the flange support, the flange support is fixed on the equipment support.
Further, the flexible connection disc structure comprises an upper flexible connection disc, a lower flexible connection disc and a flexible connection rope, the upper flexible connection disc is fixedly connected with an output shaft of the high-speed motor through threads, the lower flexible connection disc is fixedly connected with the coupler through threads, a gap is reserved between the upper flexible connection disc and the lower flexible connection disc, and the upper flexible connection disc and the lower flexible connection disc are fixedly connected through the flexible connection rope.
Furthermore, the upper flexible connecting disc and the lower flexible connecting disc are provided with uniformly distributed round holes for penetrating through the flexible connecting rope and flat wires for screwing.
Furthermore, the circumferential vibration damper is provided with damping grooves which are uniformly distributed.
Further, during the experiment, the shaft coupling is connected with the experimental rotor.
The invention has the beneficial effects that:
1. the high-speed motor and the transmission shaft are flexibly connected, so that the phenomenon that violent vibration generated by the rotor during high-speed rotation is transmitted into the motor to influence and damage the motor is avoided.
2. Through the design of circumference vibrations attenuator, can avoid on the violent vibrations that are produced by the rotor transmit the equipment body, influence and damage whole equipment structure.
3. Through the structural design of the flexible connecting disc and the circumferential vibration damper, the overspeed experimental device can overcome strong vibration generated by the rotor at the critical rotating speed. Therefore, the mechanical safety performance of the rotor after passing through the critical rotating speed is tested.
Drawings
FIG. 1 is a structural diagram of a hoisting type general rotor critical rotation speed testing device of the present invention;
FIG. 2 is a sectional view of the structure of the hoisting type universal rotor critical speed testing device of the present invention;
FIG. 3 is a schematic diagram of a flexible connecting disc structure;
fig. 4 is a structural schematic diagram of a circumferential vibration damper.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1 and 2, the hoisting type general rotor critical rotation speed testing device disclosed by the invention comprises a high-speed motor 1, an upper flexible connecting disc 2, a lower flexible connecting disc 3, a high-speed bearing 4, a circumferential vibration damper 5, a flexible connecting rope 6, a coupler 7, a bearing seat 8, a vibration sensor 9, a flange support 10, an equipment support 11 and an experimental rotor 12.
High-speed motor 1 passes through thread fixed connection with last flexible connection pad 2, lower flexible connection pad 3 passes through thread fixed connection with shaft coupling 7, go up flexible connection pad 2 and keep between the flexible connection pad 3 down several millimeters clearance and connect fixedly with flexible connection rope 6, shaft coupling 7 is installed in high-speed bearing 4's inner circle, high-speed bearing 4's outer lane is installed in bearing frame 8, the inner circle at circumference vibrations attenuator 5 is installed to bearing frame 8, the outer lane of circumference vibrations attenuator 5 is installed in flange bracket 10, flange bracket 10 is fixed on equipment support 11. The vibration sensor 9 is fastened to the bearing housing 8 by a screw, and the vibration value of the bearing housing 8 can be read from an external device.
As shown in figure 3, the upper flexible connecting disk 2 and the lower flexible connecting disk 3 are provided with uniformly distributed round holes 2-1 for penetrating through the flexible connecting rope 6 and flat wires 2-2 for screwing.
As shown in fig. 4, the circumferential vibration damper 5 has a considerable number of uniformly distributed shock-absorbing grooves 5-1.
In the embodiment, (1) the high-speed motor and the transmission shaft are flexibly connected, so that the phenomenon that violent vibration generated by the rotor during high-speed rotation is transmitted into the motor to influence and damage the motor is avoided. (2) Through the design of circumference vibrations attenuator, can avoid on the violent vibrations that are produced by the rotor transmit the equipment body, influence and damage whole equipment structure. (3) Through the structural design of the flexible connecting disc and the circumferential vibration damper, the overspeed experimental device can overcome strong vibration generated by the rotor at the critical rotating speed. Therefore, the mechanical safety performance of the rotor after passing through the critical rotating speed is tested.
The structural design is mainly innovation and invention of a connection method between a high-speed motor and an experimental rotor. Firstly, starting from a high-speed motor, a flexible connecting disc 2 is arranged on an output shaft of the high-speed motor 1, and the flexible connecting disc can be positioned and connected by a cylindrical surface or connected by a conical surface point. The lower flexible coupling 3 is then mounted on the coupling 7 in the same manner as above. After the installation, the key point lies in that a gap of several millimeters is reserved between an upper flexible connecting disc 2 and a lower flexible connecting disc 3, a flexible connecting rope 6 penetrates through round holes of the upper and lower connecting discs to fix the upper and lower connecting discs, so that the motor is effectively protected from the influence of vibration, a coupler 7 is arranged in an inner ring of a high-speed bearing 4 and cannot be knocked and impacted, an outer ring of the high-speed bearing 4 is arranged in a bearing seat 8 by the same method, two circumferential vibration dampers 5 are arranged on the outer ring of the bearing seat 8 and are used for absorbing the vibration generated when a rotor rotates at a high speed, then the circumferential vibration dampers 5, the bearing seat 8, the high-speed bearing 4, the coupler 7 and the like are integrally arranged on a flange bracket 10, the flange bracket 10 is fixed on an equipment bracket 11, and finally a vibration sensor 9 is fastened on the bearing seat 8 through threads, so that the installation of the whole device structure is basically completed, during testing, various types of experimental rotors 12 are connected to the coupler 7, so that high-speed rotation test can be performed.
After the test begins, the high-speed motor 1 begins to rotate, drives the upper flexible connection disc 2, the upper flexible connection disc 2 drives the lower flexible connection disc 3 to rotate through the flexible connection rope 6, the lower flexible connection disc 3 drives the coupler 7, and the coupler 7 drives the experimental rotor 12 to rotate.
After the experimental rotor 12 rotates at a high speed, high-frequency vibration can be generated due to unbalance, wherein radial vibration can be absorbed through the two circumferential vibration dampers 5, axial vibration can be absorbed through the two flexible connecting discs 2 and the flexible connecting rope 6, and a high-speed motor and an overspeed experimental device are effectively protected.
The structural design of the invention can effectively lighten and absorb the strong vibration generated when the rotor reaches and passes through the critical rotating speed.
The invention has the structural characteristics that:
the invention relates to a structural device which is connected to an experimental rotor from a high-speed motor through a flexible connecting shaft and a circumferential vibration damper, wherein the high-speed motor is driven by a frequency converter, the connection between the high-speed motor and the experimental rotor through a transmission shaft is flexible, vibration generated when the experimental rotor rotates at high speed can be absorbed by a flexible connecting rope between an upper flexible connecting disc and a lower flexible connecting disc, the vibration can not be transmitted to a rotating shaft of the motor, meanwhile, the vibration of the rotor is transmitted to the circumferential vibration damper through the transmission shaft, and is transmitted to an experimental device body after vibration absorption and damping, so that the vibration of the whole equipment device is greatly reduced, and the influence of strong vibration of the experimental rotor at critical rotating speed on the mechanical safety performance of the rotor is tested and evaluated.
Claims (5)
1. The utility model provides a critical rotational speed testing arrangement of general type rotor of hoist and mount formula, includes high-speed motor, shaft coupling, bearing frame, flange support, equipment support, its characterized in that: the output shaft of the high-speed motor is connected with the coupler through a flexible connecting disc structure, the coupler is installed in the bearing block through a high-speed bearing, the bearing block is connected with the flange support through a circumferential vibration damper, and the flange support is fixed on the equipment support.
2. The hoisting type general rotor critical rotation speed testing device according to claim 1, characterized in that: the flexible connection disc structure comprises an upper flexible connection disc, a lower flexible connection disc and a flexible connection rope, wherein the upper flexible connection disc is fixedly connected with an output shaft of the high-speed motor through threads, the lower flexible connection disc is fixedly connected with the coupler through threads, a gap is reserved between the upper flexible connection disc and the lower flexible connection disc, and the upper flexible connection disc and the lower flexible connection disc are fixedly connected through the flexible connection rope.
3. The hoisting type general rotor critical rotation speed testing device according to claim 2, characterized in that: and uniformly distributed round holes for penetrating the flexible connecting rope and flat wires for screwing are arranged on the upper flexible connecting disc and the lower flexible connecting disc.
4. The hoisting type general rotor critical rotation speed testing device according to claim 1, characterized in that: and the circumferential vibration damper is provided with damping grooves which are uniformly distributed.
5. The hoisting type general rotor critical rotation speed testing device according to claim 1, characterized in that: during the experiment, the shaft coupling is connected with the experimental rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294143.4A CN114018557A (en) | 2021-11-03 | 2021-11-03 | Hoisting type universal rotor critical rotating speed testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294143.4A CN114018557A (en) | 2021-11-03 | 2021-11-03 | Hoisting type universal rotor critical rotating speed testing device |
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| Publication Number | Publication Date |
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| CN114018557A true CN114018557A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111294143.4A Pending CN114018557A (en) | 2021-11-03 | 2021-11-03 | Hoisting type universal rotor critical rotating speed testing device |
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| CN (1) | CN114018557A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048964A1 (en) * | 2001-09-13 | 2003-03-13 | Brackett Norman C. | Flexible bearing damping system, energy storage system using such a system, and a method related thereto |
| CN102252020A (en) * | 2011-06-10 | 2011-11-23 | 张华林 | Radial rolling bearing seat assembly structure with good vibration absorption |
| CN103388648A (en) * | 2013-08-15 | 2013-11-13 | 贵州大学 | Method and device for improving reliability of damping device in energy storage flywheel system |
| CN103604587A (en) * | 2013-08-27 | 2014-02-26 | 杭州海罗马科技有限公司 | High-speed rotation testing machine and method for testing high-speed rotation strength performance of rotor |
| CN108150605A (en) * | 2017-12-18 | 2018-06-12 | 北京大块科技有限公司 | A kind of damping shock absorber and its manufacturing method |
| CN109374209A (en) * | 2018-12-19 | 2019-02-22 | 华电电力科学研究院有限公司 | A kind of Rotor Low-speed Dynamic platform and critical speed prediction technique |
| CN209586987U (en) * | 2019-01-31 | 2019-11-05 | 洛阳普瑞森精密轴承有限公司 | A kind of flexible clutch with big error compensation function |
| CN113092088A (en) * | 2021-03-26 | 2021-07-09 | 北京航空航天大学 | Vertical rotor tester with adjustable asymmetric degree of supporting rigidity |
-
2021
- 2021-11-03 CN CN202111294143.4A patent/CN114018557A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048964A1 (en) * | 2001-09-13 | 2003-03-13 | Brackett Norman C. | Flexible bearing damping system, energy storage system using such a system, and a method related thereto |
| CN102252020A (en) * | 2011-06-10 | 2011-11-23 | 张华林 | Radial rolling bearing seat assembly structure with good vibration absorption |
| CN103388648A (en) * | 2013-08-15 | 2013-11-13 | 贵州大学 | Method and device for improving reliability of damping device in energy storage flywheel system |
| CN103604587A (en) * | 2013-08-27 | 2014-02-26 | 杭州海罗马科技有限公司 | High-speed rotation testing machine and method for testing high-speed rotation strength performance of rotor |
| CN108150605A (en) * | 2017-12-18 | 2018-06-12 | 北京大块科技有限公司 | A kind of damping shock absorber and its manufacturing method |
| CN109374209A (en) * | 2018-12-19 | 2019-02-22 | 华电电力科学研究院有限公司 | A kind of Rotor Low-speed Dynamic platform and critical speed prediction technique |
| CN209586987U (en) * | 2019-01-31 | 2019-11-05 | 洛阳普瑞森精密轴承有限公司 | A kind of flexible clutch with big error compensation function |
| CN113092088A (en) * | 2021-03-26 | 2021-07-09 | 北京航空航天大学 | Vertical rotor tester with adjustable asymmetric degree of supporting rigidity |
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