CN109185387B - Elastic support active hydraulic vibration damping device and rotor test bed thereof - Google Patents
Elastic support active hydraulic vibration damping device and rotor test bed thereof Download PDFInfo
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- CN109185387B CN109185387B CN201811218037.6A CN201811218037A CN109185387B CN 109185387 B CN109185387 B CN 109185387B CN 201811218037 A CN201811218037 A CN 201811218037A CN 109185387 B CN109185387 B CN 109185387B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements
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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
Abstract
The elastic support active hydraulic vibration damping device and a rotor test bed thereof are composed of an active hydraulic vibration damping device and an elastic support rotor system, wherein the active hydraulic vibration damping device is composed of a hydraulic vibration damping device, a hydraulic system and a measurement and control system for testing the vibration of the rotor system, and the hydraulic system controls the hydraulic vibration damping device according to the instruction of the measurement and control system; the invention adopts the elastic support active hydraulic vibration damper and is realized on the rotor test bed, so that the vibration amplitude of the rotor system passing through the critical rotating speed area can be obviously reduced, the invention can also play a good vibration inhibition role in sudden failure of the rotor system, and the active inhibition of the vibration of the rotor system of the high-speed rotating machine can be realized.
Description
Technical Field
The present invention relates to the field of rotating machinery.
Background
The support is an important structural component for ensuring the safe and stable operation of the high-speed rotating machinery, and the performance of the support is closely related to the vibration problem of the whole machine. In the dynamic design process of the whole high-speed rotating machine, once the vibration of a supporting structure and a rotor system is too large in a working range, a series of secondary faults of bearing damage or vibration fatigue can be caused, and the safety and the reliability of the whole machine are seriously influenced.
Aiming at the problem of overlarge vibration of the whole machine, the rotor system of the aero-engine generally adopts a combined structure of an elastic support structure and an extrusion oil film damper at present, and certain vibration energy is consumed through elastic deformation of the elastic support and extrusion of the oil film, so that the external transmission load and vibration of the system are reduced. However, the passive damping mode has a limited effect on suppressing the vibration of the rotor system, and once the design parameters are improperly selected, the damping effect is rapidly reduced, the vibration is too large, and even the system is unstable in operation, so that an effective elastic support active hydraulic damping device is needed to be provided.
Disclosure of Invention
The invention provides an elastic support active hydraulic vibration damping device and a rotor test bed thereof, aiming at overcoming the problem of overlarge overall vibration of the traditional rotary machine.
The technical scheme adopted by the invention for realizing the purpose is as follows: the elastic support active hydraulic vibration damping device and the rotor test bed thereof are composed of an active hydraulic vibration damping device 1 and an elastic support rotor system 2, wherein the active hydraulic vibration damping device 1 is composed of a hydraulic vibration damping device 11, a hydraulic system 12 and a measurement and control system 13 for testing the vibration of the rotor system, and the hydraulic system 12 controls the hydraulic vibration damping device 11 according to the instruction of the measurement and control system 13; the elastic support rotor test bed consists of a first fulcrum 21, a rotating shaft 22, a rotating disc 23, a second fulcrum 24, a coupling 25, a driving motor 26 and a base 27, wherein the rotating shaft 22 is installed on the first fulcrum 21 and the second fulcrum 24, the rotating disc 23 is installed on the rotating shaft 22, the rotating shaft 22 is connected with the driving motor 27 through the coupling 25, the first fulcrum 21 comprises a supporting seat 211, a squirrel cage 213, a supporting bearing 214 and a bearing seat 215, the squirrel cage 213 is fixedly connected with the supporting seat 211, the bearing seat 215 is fixedly connected with the squirrel cage 213, and the supporting bearing 214 is installed and fixed inside the bearing seat 215; the hydraulic vibration damping device 11 comprises an active hydraulic support 111 and a hydraulic joint 113, wherein the active hydraulic support 111 is fixedly connected with a support seat 211, a certain gap exists between the active hydraulic support 111 and a bearing seat 215, a hydraulic cavity 1111 is arranged on the active hydraulic support 111 in the circumferential direction, and the active hydraulic support 111 is provided with the hydraulic joint 113 for connecting a hydraulic pipeline; the hydraulic system 12 comprises a hydraulic oil tank 121, a hydraulic oil pump 122 and an electromagnetic servo valve 124, wherein the hydraulic oil pump 122 is connected with the oil tank 121, the electromagnetic servo valve 124 is arranged on a pipeline between the hydraulic oil pump 122 and the active hydraulic support 111, and the electromagnetic servo valve 124 controls the position of hydraulic oil flowing into a hydraulic cavity 1111 in the active hydraulic support 111, so that the bearing seat 215 is pushed to move in different directions; the measurement and control system 13 is composed of a controller 131, a collecting instrument 132 and a vibration testing sensor 133, the vibration sensor 133 is connected with the collecting instrument 132, the collecting instrument 132 is connected with the controller 131, and the controller 131 is connected with the electromagnetic servo valve 124.
The first fulcrum 21 further includes a transition connection ring 212, the transition connection ring 212 is fixedly connected with the support base 211 through a bolt, the squirrel cage 213 is fixedly connected with the transition connection ring 212 through a bolt, and the support bearing 214 is a rolling bearing.
The hydraulic vibration damping device 11 further comprises a seal 112, and a seal groove for mounting the seal 112 is formed in the bearing seat 215.
Two liang of hydraulic chamber 1111 intervals set up and are used for installing rubber seal's recess 1112, and hydraulic chamber 1111 upper portion sets up through-hole 1113, is equipped with the helicitic texture that is used for fixed mounting hydraulic joint 118 in the through-hole 1113.
The hydraulic system further comprises a filter 123, an electromagnetic pressure regulating valve 125 and an oil return filter 126, the filter 123 is installed on a pipeline between the hydraulic oil pump 122 and the electromagnetic servo valve 124, the electromagnetic pressure regulating valve 125 is installed between an oil inlet path and an oil return path, and the oil return filter 126 is installed on the oil return path.
The vibration test sensor 133 includes a first sensor installed in the horizontal direction of the rotor and a second sensor installed in the vertical direction of the rotor, and the vibration test sensor 133 is an acceleration sensor, a displacement sensor or a strain gauge.
The elastic support active hydraulic vibration damping device and the rotor test bed thereof can obviously reduce the vibration amplitude when the rotor system passes through a critical rotating speed area, can also play a good vibration suppression role in sudden faults (such as sudden unbalance, rotor rubbing, rotor instability and the like) of the rotor system, and realize the active suppression of the vibration of a high-speed rotating mechanical rotor system.
Drawings
FIG. 1 is a block diagram of a rotor test stand with a resiliently mounted active hydraulic damping device.
Fig. 2 is a general block diagram of a rotor test stand with a resiliently mounted active hydraulic damping device.
FIG. 3 is a cross-sectional view of a rotor test stand with a resiliently mounted active hydraulic damping device.
FIG. 4a is a front sectional view of the structure of the elastic supporting fulcrum and the hydraulic damping device.
Fig. 4b is a three-dimensional cross-sectional view of the elastic support fulcrum and the hydraulic damping device.
FIG. 5b is a front view of the active hydraulic mount.
FIG. 5a is a cross-sectional view of the active hydraulic mount A-A.
Fig. 6 is a schematic diagram of a hydraulic system for elastically supporting an active hydraulic damping device.
FIG. 7 is a schematic diagram of the measurement and control system.
Fig. 8 is a schematic diagram of an active hydraulic damping device with elastic support.
In the figure: 1. the vibration damping device comprises an active hydraulic vibration damping device, 2, an elastic supporting rotor system, 11, a hydraulic vibration damping device, 12, a hydraulic system, 13, a measurement and control system, 21, a first fulcrum, 22, a rotating shaft, 23, a rotating disc, 24, a second fulcrum, 25, a coupler, 26, a driving motor, 27, a base, 211, a supporting seat, 212, a transition connecting ring, 213, a squirrel cage, 214, a supporting bearing, 215, a bearing seat, 111, an active hydraulic support, 112, a seal, 113, a hydraulic joint, 1111, a hydraulic cavity, 1112, a groove, 1113, a through hole, 121, an oil tank, 122, a hydraulic oil pump, 123, a filter, 124, an electromagnetic servo valve, 125, an electromagnetic pressure regulating valve, 26, an oil return filter, 131, a controller, 132, a collecting instrument, 133, a vibration testing sensor, 1331, a first sensor, 2 and a second sensor.
Detailed Description
Referring to fig. 1 and 2, the active hydraulic damping device for elastic support and the rotor test bed thereof are composed of an active hydraulic damping device 1 and an elastic support rotor system 2. The active hydraulic vibration damping device 1 is composed of a hydraulic vibration damping device 11, a hydraulic system 12 and a measurement and control system 13. The measurement and control system 13 is used for testing the vibration of the rotor system and controlling the hydraulic system 12 in real time. The hydraulic system 12 controls the hydraulic vibration damping device 11 according to the instruction of the measurement and control system 13, so that the vibration of the elastic support rotor system is actively suppressed.
With reference to fig. 2 and 3, the rotor test bed with the elastic support active hydraulic damping device is composed of a first fulcrum 21, a rotating shaft 22, a turntable 23, a second fulcrum 24, a coupling 25, a driving motor 26 and a base 27. The first fulcrum 21 and the second fulcrum 23 are used for supporting the rotating shaft 22, the motor 25 is connected with the rotating shaft 22 through the coupler 24 to drive the rotating shaft 22 to rotate, and the coupler 24 is not limited to the specific structural form of the coupler and can be an elastic coupler or a rigid coupler.
Referring to fig. 2 and 3, the first fulcrum 21 and the second fulcrum 24 may be of the same structure or different structures, in this example, for comparison, the first fulcrum 21 and the second fulcrum 24 are described as of different structures, the first fulcrum 21 is a fulcrum with an active hydraulic damping device of an elastic support, and the second fulcrum 24 is a fulcrum structure of a common elastic support.
With reference to fig. 4a and 4b, the first fulcrum 21 is a fulcrum structure having an elastic support active hydraulic damping device, and includes a support base 211, a transition connection ring 212, a squirrel cage 213, a support bearing 214, and a bearing base 215. The transition connecting ring 212 is fixedly connected with the supporting seat 211 through bolts, the squirrel cage 213 is fixedly connected with the transition connecting ring 212 through bolts, the bearing seat 215 is fixedly connected with the squirrel cage 213 through bolts, the supporting bearing 214 is fixedly installed inside the bearing seat 215, and the supporting bearing 214 is a rolling bearing and is used for supporting the rotation of the rotating shaft 22.
The hydraulic damping device 11 is composed of an active hydraulic support 111, a seal 112, a hydraulic joint 113 and a bearing seat 215. The active hydraulic support 111 and the support seat 211 are fixedly connected through bolts, a certain gap exists between the active hydraulic support 111 and the bearing seat 215, the bearing seat 215 is allowed to have a certain vibration range, the bearing seat 215 is provided with a sealing groove for installing a seal 112, the seal is used for sealing hydraulic oil, when the hydraulic vibration damping device 11 is prevented from operating, the hydraulic oil is leaked, and the active hydraulic support 111 is provided with a plurality of hydraulic connectors 113 for connecting a hydraulic pipeline.
With reference to fig. 5a and 5b, a plurality of hydraulic cavities 1111 are circumferentially arranged on the active hydraulic support 111, 4 hydraulic cavities are taken as an example in the patent, the structure of the formed cavities is defined as A, B, C, D, and corresponding grooves 1112 are formed between every two hydraulic cavities 1111 for installing rubber seals, so that the hydraulic cavities 1111 form a closed cavity to prevent hydraulic oil from leaking; the upper part of the hydraulic cavity 1111 is provided with a through hole 1113, and the through hole 1113 is provided with a thread structure for fixedly mounting the hydraulic joint 118, so that hydraulic oil can flow into the hydraulic cavity 1111.
Referring to fig. 6, the hydraulic system 12 is composed of a hydraulic oil tank 121, a hydraulic oil pump 122, a filter 123, an electromagnetic servo valve 124, an electromagnetic pressure regulating valve 125, and an oil return filter 126, wherein the hydraulic oil pump 122 draws hydraulic oil from the hydraulic oil tank 121, filters the hydraulic oil through the filter 123, and controls the position of the hydraulic oil flowing into the hydraulic cavity 1111 of the active hydraulic support 111 through the electromagnetic servo valve 124, so as to push the bearing seat 215 to move in different directions, thereby achieving a vibration suppression function, and the hydraulic oil returns to the filter 126 and returns to the oil tank 121 after acting.
Referring to fig. 7, the measurement and control system 13 is composed of a controller 131, a collecting instrument 132, and a vibration test sensor 133, where the vibration test sensor 133 may be an acceleration sensor, a displacement sensor, or a strain gauge. The vibration sensor 133 detects the vibration of the elastic support rotor system, transmits a vibration signal to the acquisition instrument 132, and transmits the vibration signal to the controller 131, and the controller 131 controls the electromagnetic servo valve 124 through calculation, so as to control the action of the hydraulic vibration damping device 11, and further suppress the vibration of the elastic support rotor system.
The working principle of the elastically supported active hydraulic damping device will be described with reference to fig. 1, 4, 6 and 7. The rotor is respectively provided with vibration sensors 1331 and 1332 horizontally and vertically for testing vibration of the elastic support rotating shaft, in this example, the displacement sensors are used for describing, the displacement sensors are used for testing vibration of the rotating shaft in real time, vibration signals of the rotating shaft obtained through testing are transmitted to the acquisition instrument 132 and are transmitted to the controller 131, and the controller 131 controls the electromagnetic servo valve 124 through calculation, so that hydraulic oil flows at an A, B, C, D port of the hydraulic cavity 1111, and vibration of the elastic support rotor system is restrained in real time.
(1) When the 1331 sensor tests that the vibration displacement is minimum, it indicates that the rotating shaft 22 is close to the sensor 1331, the solenoid valve controls the hydraulic oil to enter from the port A of the hydraulic cavity 1111 and to exit from the port B, and pushes the bearing seat and the rotating shaft to the direction far away from the sensor (i.e. the direction opposite to the vibration direction) to suppress the vibration of the rotating shaft;
(2) when the 1332 sensor tests that the vibration displacement is minimum, it indicates that the rotating shaft 22 is close to the sensor 1332 electromagnetic valve to control the inlet and outlet of the hydraulic oil from the port C of the hydraulic cavity 1111 and the port D;
(3) the specific flow control is as follows: assuming a hydraulic chamber with a cross-sectional area of
The sensor 1331 measures the vibration displacement signal of the rotating shaft 22 as
The flow rate of A or B is
The flow rate of C or D is
Wherein H is the peak value of vibration，ωcThe rotor rotational angular velocity, ψ, is a hysteresis angle (which needs to be specifically determined according to the critical rotational speed and the operating rotational speed of the rotor).
While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. Elastic support initiative hydraulic damping device and rotor test bench thereof, its characterized in that: the device is characterized by comprising an active hydraulic vibration damping device (1) and an elastic supporting rotor system (2), wherein the active hydraulic vibration damping device (1) comprises a hydraulic vibration damping device (11), a hydraulic system (12) and a measurement and control system (13) for testing the vibration of the rotor system, and the hydraulic system (12) controls the hydraulic vibration damping device (11) according to the instruction of the measurement and control system (13); the rotor test bed of the elastic support rotor system comprises a first fulcrum (21), a rotating shaft (22), a rotating disc (23), a second fulcrum (24), a coupler (25), a driving motor (26) and a base (27), wherein the rotating shaft (22) is installed on the first fulcrum (21) and the second fulcrum (24), the rotating disc (23) is installed on the rotating shaft (22), the rotating shaft (22) is connected with the driving motor (27) through the coupler (25), the first fulcrum (21) comprises a supporting seat (211), a squirrel cage (213), a supporting bearing (214) and a bearing seat (215), the squirrel cage (213) is fixedly connected with the supporting seat (211), the bearing seat (215) is fixedly connected with the squirrel cage (213), and the supporting bearing (214) is installed and fixed inside the bearing seat (215); the hydraulic vibration damping device (11) comprises an active hydraulic support (111) and a hydraulic joint (113), the active hydraulic support (111) is fixedly connected with a support seat (211), a certain gap exists between the active hydraulic support (111) and a bearing seat (215), a hydraulic cavity (1111) is arranged on the active hydraulic support (111) in the circumferential direction, a through hole (1113) connected with the hydraulic joint (113) is formed in the upper part of the hydraulic cavity (1111), and the hydraulic joint (113) is connected with a hydraulic pipeline; the hydraulic system (12) comprises a hydraulic oil tank (121), a hydraulic oil pump (122) and an electromagnetic servo valve (124), wherein the hydraulic oil pump (122) is connected with the oil tank (121), the electromagnetic servo valve (124) is arranged on a pipeline between the hydraulic oil pump (22) and the active hydraulic support (111), and the electromagnetic servo valve (124) is used for controlling the position of hydraulic oil flowing into a hydraulic cavity (1111) in the active hydraulic support (111) so as to push the bearing seat (215) to move towards different directions; the measurement and control system (13) is composed of a controller (131), a collecting instrument (132) and a vibration testing sensor (133), the vibration testing sensor (133) is connected with the collecting instrument (132), the collecting instrument (132) is connected with the controller (131), and the controller (131) is connected with the electromagnetic servo valve (124).
2. The active hydraulic damping device of claim 1 and its rotor test bed, wherein: the first fulcrum (21) further comprises a transition connecting ring (212), the transition connecting ring (212) is fixedly connected with the supporting seat (211) through bolts, the squirrel cage (213) is fixedly connected with the transition connecting ring (212) through bolts, and the supporting bearing (214) is a rolling bearing.
3. The active hydraulic damping device of claim 1 and its rotor test bed, wherein: the hydraulic vibration damping device (11) further comprises a seal (112), and a seal groove for mounting the seal (112) is formed in the bearing seat (215).
4. The active hydraulic damping device of claim 1 and its rotor test bed, wherein: two liang of hydraulic pressure cavities (1111) set up recess (1112) that are used for installing rubber seal in, are equipped with the helicitic texture that is used for fixed mounting hydraulic pressure to connect (118) in through-hole (1113).
5. The active hydraulic damping device of claim 1 and its rotor test bed, wherein: the hydraulic system further comprises a filter (123), an electromagnetic pressure regulating valve (125) and an oil return filter (126), the filter (123) is installed on a pipeline between the hydraulic oil pump (122) and the electromagnetic servo valve (124), the electromagnetic pressure regulating valve (125) is installed between the oil inlet oil way and the oil return oil way, and the oil return filter (126) is installed on the oil return oil way.
6. The active hydraulic damping device of claim 1 and its rotor test bed, wherein: the vibration test sensor (133) comprises a first sensor arranged in the horizontal direction of the rotor and a second sensor arranged in the vertical direction of the rotor, and the vibration test sensor (133) is an acceleration sensor or a displacement sensor or a strain gauge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811218037.6A CN109185387B (en) | 2018-11-12 | 2018-11-12 | Elastic support active hydraulic vibration damping device and rotor test bed thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811218037.6A CN109185387B (en) | 2018-11-12 | 2018-11-12 | Elastic support active hydraulic vibration damping device and rotor test bed thereof |
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| CN109185387B true CN109185387B (en) | 2020-08-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109774968B (en) * | 2019-01-22 | 2021-12-14 | 南京航空航天大学 | Multi-span rotor test bed with adjustable shaft section and support |
| CN109827772B (en) * | 2019-02-22 | 2021-07-16 | 大连交通大学 | Rotor fulcrum load identification experimental device and method based on elastic supporting squirrel cage strain |
| CN110286701A (en) * | 2019-07-31 | 2019-09-27 | 中国船舶重工集团公司第七0三研究所 | A kind of rotating machinery cantilever type elastic bearing part of intelligent vibration control |
| CN111678689A (en) * | 2020-07-06 | 2020-09-18 | 东北大学 | Elastic ring supporting rotor system inherent characteristic test bed and measuring method thereof |
| CN112354702B (en) * | 2020-10-31 | 2022-05-06 | 江苏琥啸换热设备有限公司 | Hydraulic centrifugal barrel rotating support shaft |
| CN112688463A (en) * | 2020-12-15 | 2021-04-20 | 桂林航天工业学院 | Motor with vibration damper |
| CN113090710B (en) * | 2021-03-23 | 2022-10-11 | 南京航空航天大学 | Annular shear thickening fluid type damper and rotor-support system |
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