CN113984365B - Novel extrusion oil film damper dynamic coefficient measurement device - Google Patents
Novel extrusion oil film damper dynamic coefficient measurement device Download PDFInfo
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- CN113984365B CN113984365B CN202111289974.2A CN202111289974A CN113984365B CN 113984365 B CN113984365 B CN 113984365B CN 202111289974 A CN202111289974 A CN 202111289974A CN 113984365 B CN113984365 B CN 113984365B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 50
- 238000005259 measurement Methods 0.000 title claims description 5
- 238000013016 damping Methods 0.000 claims abstract description 30
- 241000555745 Sciuridae Species 0.000 claims description 179
- 238000006073 displacement reaction Methods 0.000 claims description 65
- 230000003014 reinforcing effect Effects 0.000 claims description 50
- 230000007246 mechanism Effects 0.000 claims description 39
- 239000002184 metal Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 5
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 239000004417 polycarbonate Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 115
- 230000005284 excitation Effects 0.000 description 14
- 238000012360 testing method Methods 0.000 description 13
- 239000010687 lubricating oil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000013011 mating Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention provides a novel dynamic coefficient measuring device of an extrusion oil film damper, which aims to solve the problems that the dynamic coefficient measuring device of the existing extrusion oil film damper is only applied by exciting force through power elements such as a driving motor, and the application mode is poor in rationality, so that the accuracy of evaluating damping characteristics is low.
Description
Technical Field
The invention belongs to the field of extrusion oil film dampers, and particularly relates to a novel extrusion oil film damper dynamic coefficient measuring device.
Background
The extrusion oil film damper is used as a vibration reduction and suppression device, has simple structure and excellent vibration reduction performance, plays a main role in vibration reduction of an aero-engine and a gas turbine, and can remarkably improve the running reliability of the engine.
The dynamic coefficient of the extrusion oil film damper is commonly used for measuring the performance of the damper and predicting the vibration at the critical rotating speed of the rotor, the dynamic coefficient is identified by obtaining the exciting force and displacement of the damper through an excitation test, the accuracy of identification mainly depends on the exciting force application mode and the test principle of a testing device, the exciting force is applied through a driving motor and other power elements, the exciting force transmitted to the oil film of the damper cannot be accurately measured, the applying and measuring mode is poor in rationality, and the accuracy of evaluating the damping characteristic is low, so that the novel dynamic coefficient measuring device of the extrusion oil film damper is very suitable for practical needs for overcoming the problems.
Disclosure of Invention
The invention aims to solve the problems of low evaluation accuracy of the evaluation damping characteristic caused by poor rationality and inaccurate excitation force measurement of the excitation force application mode of the existing extrusion oil film damper dynamic coefficient measuring device, and further provides a novel extrusion oil film damper dynamic coefficient measuring device;
The novel dynamic coefficient measuring device for the extrusion oil film damper comprises an elastic squirrel cage supporting component, a damping ring supporting component, a weak rigidity elastic squirrel cage supporting seat, an oil film damper clearance adjusting ring, two extrusion oil film damper end sealing rings, a first stop washer, a first locking round nut, a rotary vibration exciter, four studs, four dynamic force sensors, a plurality of fixing screws, a taper sleeve, a second stop washer, a second locking round nut, a squirrel cage front end oil guiding ring, a damper outer ring supporting seat and a displacement sensor component;
The elastic squirrel cage supporting component and the damping ring supporting component are arranged oppositely, the weak rigidity elastic squirrel cage supporting seat is arranged at one side of the elastic squirrel cage supporting component facing the damping ring supporting component, one end of the weak rigidity elastic squirrel cage supporting seat is arranged on the elastic squirrel cage supporting component through a plurality of second full thread stud nut mechanisms, a second gasket is arranged between the contact surfaces of the nut and the weak rigidity elastic squirrel cage supporting seat in each second full thread stud nut mechanism, the oil film damper clearance adjusting ring is sleeved on the weak rigidity elastic squirrel cage supporting seat, the oil film damper clearance adjusting ring is matched with the weak rigidity elastic squirrel cage supporting seat through a conical surface, one end of the oil film damper clearance adjusting ring far away from the elastic squirrel cage supporting component is provided with a first locking round nut which is sleeved on the weak rigidity elastic squirrel cage supporting seat, the contact surface of the weak rigidity elastic squirrel cage supporting seat and the first locking round nut is provided with external threads, the first locking round nut is in threaded connection with the weak rigidity elastic squirrel cage supporting seat, the oil film damper clearance adjusting ring is in fastening connection with the weak rigidity elastic squirrel cage supporting seat through the first locking round nut, a first stop washer is arranged between the oil film damper clearance adjusting ring and the weak rigidity elastic squirrel cage supporting seat, two extrusion oil film damper end sealing rings are embedded on the outer circular surfaces of the two ends of the oil film damper clearance adjusting ring along the axial extension direction of the oil film damper clearance adjusting ring, the taper sleeve is arranged in the weak rigidity elastic squirrel cage supporting seat, the taper sleeve is matched with the inner spigot of the weak rigidity elastic squirrel cage supporting seat through a conical surface, the other end of the weak rigidity elastic squirrel cage supporting seat is provided with a second locking round nut, the second locking round nut is sleeved on the taper sleeve, the contact surface of the taper sleeve and the second locking round nut is provided with external threads, the second locking round nut is in threaded connection with the taper sleeve, the taper sleeve limits axial movement through the second locking round nut, the taper sleeve is tightly fixed with the weak rigidity elastic squirrel cage supporting seat, a second stop washer is arranged between the right end face of the weak rigidity elastic squirrel cage supporting seat and the second locking round nut, four dynamic force sensors are circumferentially equidistantly arranged on the outer circular face of the tail end of the rotary vibration exciter, each dynamic force sensor is tightly connected with the inner wall of the taper sleeve through a double-end stud and a straight-groove locking nut, the squirrel cage front end oil guide ring is arranged on one end of the taper sleeve, close to the elastic squirrel cage supporting seat, and is tightly connected with the taper sleeve through a plurality of fixing screws, the damper outer ring is arranged on one side of the damping ring supporting seat, which faces the elastic squirrel cage supporting seat, one end of the damper outer ring is arranged on the damping ring supporting seat through a plurality of three-number full-thread stud nut mechanisms, a three-number washer is arranged between the contact faces of the nut and the damper outer ring supporting seat in each three-number full-thread stud nut mechanism, the damper outer ring supporting seat is coaxially arranged with the weak rigidity elastic squirrel cage supporting seat, the other end oil guide ring is arranged on the sensor seat, the sensor seat is arranged on the outer ring, and the sensor seat is arranged on the sensor seat, and the sensor seat is arranged on the outer ring, the sensor seat is arranged on the sensor seat, and the displacement part, and the sensor seat is arranged on the displacement part, and the displacement, and is;
Further, the elastic squirrel cage supporting assembly comprises a weak rigidity elastic squirrel cage supporting lower support, four weak rigidity elastic squirrel cage supporting lower support reinforcing rib plates, a weak rigidity elastic squirrel cage supporting upper support, two weak rigidity elastic squirrel cage supporting upper support reinforcing rib plates, four first full thread stud nut mechanisms and four first gaskets;
The two groups of the reinforcing rib plates of the lower support of the elastic squirrel cage are oppositely arranged at two sides of the lower support of the elastic squirrel cage, each reinforcing rib plate of the lower support of the elastic squirrel cage of the weak rigidity is fixedly welded with the side wall of the lower support of the elastic squirrel cage of the weak rigidity, the reinforcing rib plates of the upper support of the elastic squirrel cage of the weak rigidity are arranged at one side of the upper support of the elastic squirrel cage of the weak rigidity, which is far away from the damping ring support assembly, and the reinforcing rib plates of the upper support of the elastic squirrel cage of the weak rigidity are fixedly welded with the upper support of the elastic squirrel cage of the weak rigidity;
Further, the damping ring supporting component comprises a damper outer ring lower support, four damper outer ring lower support reinforcing rib plates, a damper outer ring upper support, two damper outer ring upper support reinforcing rib plates, four first full-thread stud nut mechanisms and four first gaskets;
The damper outer ring lower support is arranged below the damper outer ring upper support, the damper outer ring lower support is fixedly connected with the damper outer ring upper support through four first full-thread stud nut mechanisms, a first gasket is arranged between the contact surfaces of nuts and the damper outer ring lower support in each first full-thread stud nut mechanism, four damper outer ring lower support reinforcing rib plates are equally divided into two groups, the two groups of damper outer ring lower support reinforcing rib plates are oppositely arranged on two sides of the damper outer ring lower support, each damper outer ring lower support reinforcing rib plate in each group is fixedly welded with the side wall of the damper outer ring lower support where the damper outer ring lower support is located, the two damper outer ring upper support reinforcing rib plates are arranged on one side, far away from the elastic squirrel cage supporting assembly, of each damper outer ring upper support reinforcing rib plate is fixedly welded with the damper outer ring upper support, and one end of the damper outer ring is arranged on the damper outer ring upper support through a plurality of third full-thread stud nut mechanisms;
Further, the rotary vibration exciter comprises a rotary vibration exciter shell, a plurality of rotary vibration exciter rotor balance disc holes, permanent magnets, stator coils, aviation wiring terminals, rotary vibration exciter rotors, screw holes, rotary vibration exciter section openings and double-headed screws;
The rotary vibration exciter rotor is inserted into a rotary vibration exciter shell, the rotary vibration exciter rotor is rotationally connected with the rotary vibration exciter shell through two bearings at the head and the tail, a stator coil is arranged on the inner wall of the rotary vibration exciter shell, the outer wall of the stator coil is fixedly connected with the inner wall of the rotary vibration exciter shell, a permanent magnet is sleeved at the corresponding position of the rotary vibration exciter rotor and the inner wall of the stator coil, a gap is arranged between the inner wall of the stator coil and the rotary vibration exciter rotor, one end of an aviation wiring terminal is connected with the stator coil, the other end of the aviation wiring terminal penetrates through the rotary vibration exciter shell and is connected with a power supply, a balance disc is sleeved at the tail end of the rotary vibration exciter rotor, a plurality of rotary vibration exciter rotor balance disc holes are circumferentially equidistantly processed on the end face of the balance disc, four screw holes are circumferentially equidistantly processed on the outer circular face of the rotary vibration exciter shell corresponding to the balance disc, each dynamic force sensor is mounted on the rotary vibration exciter shell through a double-head screw, a rotary vibration exciter opening is formed in the outer circular face of the rotary vibration exciter shell corresponding to the balance disc, and the section of the rotary vibration exciter rotor opening is correspondingly provided with the vibration exciter opening;
Further, the displacement sensor assembly comprises a displacement sensor support connecting plate, a displacement sensor support and a displacement sensor, wherein a plurality of bolt holes are formed in one end of the displacement sensor support connecting plate, a bolt is arranged in each bolt hole, a lock nut is sleeved on one end of each bolt, the displacement sensor support connecting plate is mounted on an upper support of the damper outer ring in a matched mode through the plurality of bolts and the lock nuts, the displacement sensor support is arranged on one side, facing the elastic squirrel cage supporting assembly, of the displacement sensor support connecting plate, one end of the displacement sensor support is fixedly connected with the displacement sensor support connecting plate through a bolt nut assembly, and the displacement sensor is mounted on the other end of the displacement sensor support;
further, four bolt blind holes are machined in the matching surface of the taper sleeve and the squirrel cage at equal intervals along the circumferential direction, a lock nut is arranged in each bolt blind hole, a dynamic force sensor matching spigot is arranged at the bottom of each bolt blind hole, each bolt blind hole is communicated with one dynamic force sensor matching spigot, one end of each double-end stud is inserted into one dynamic force sensor, the other end of each double-end stud penetrates through one dynamic force sensor matching spigot and is arranged in one bolt blind hole and is in fastening connection with the lock nut arranged in the bolt blind hole, and each dynamic force sensor is matched with one dynamic force sensor matching spigot;
Further, an oil collecting groove is arranged between the elastic squirrel cage supporting component and the damping ring supporting component, one end of the oil collecting groove is detachably connected with the lower support of the weak-rigidity elastic squirrel cage supporting, the other end of the oil collecting groove is detachably connected with the lower support of the outer ring of the damper, and an oil return hole is formed in the bottom of the oil collecting groove;
Further, the damper outer ring supporting seat comprises a transparent sleeve and a metal cone, one end of the transparent sleeve is fixedly connected with a small spigot end of the metal cone, a large spigot end of the metal cone is arranged on the damper outer ring upper supporting seat through a plurality of third full-thread stud nut mechanisms, and an oil leakage hole of the damper outer ring supporting seat is formed in the outer circular surface of the small spigot end of the metal cone;
further, the transparent sleeve is made of polycarbonate;
Further, a plurality of oil film damper inner ring oil supply holes are formed in one end, close to the elastic squirrel cage supporting assembly, of the oil film damper gap adjusting ring at equal intervals in the circumferential direction, the tail end of each oil film damper inner ring oil supply hole is communicated with an extrusion oil film damper oil supply groove in the outer circular surface of the oil film damper gap adjusting ring through an oil running pipe, and extrusion oil film gaps are formed between the outer surface of the gap adjusting ring and the inner surface of the damper outer ring supporting seat.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the novel dynamic coefficient measuring device for the extrusion oil film damper, the rotary vibration exciter is adopted to excite the weak-rigidity elastic squirrel cage supporting seat, the excitation state is very close to the working condition of the extrusion oil film damper in an actual aeroengine and a gas turbine, the identified dynamic coefficient is closer to the actual condition, and the vibration reduction performance is easier to evaluate.
2. According to the novel dynamic coefficient measuring device for the extrusion oil film damper, provided by the invention, the rotary vibration exciter is adopted to excite the weak-rigidity elastic squirrel cage supporting seat, so that the actual excitation state of a rotor is effectively simplified and simulated, the problems of complex testing device and larger size during actual rotor excitation are avoided, and the small and exquisite flexibility of the testing device is realized.
3. The novel dynamic coefficient measuring device for the extrusion oil film damper provided by the invention has the advantages that the outer ring supporting seat of the damper adopts a mode of combining the metal cone cylinder and the polycarbonate sleeve, and the part of the oil film area is of a transparent structure, so that the rigidity of the outer ring supporting seat of the damper in the testing process is ensured, and the real-time observation of the cavitation phenomenon of the oil film in the testing process can be realized.
4. According to the novel dynamic coefficient measuring device for the extrusion oil film damper, the rotary vibration exciter is connected with the weak-rigidity elastic squirrel cage supporting seat through the taper sleeve, so that the taper sleeve size can be increased under the condition that the size of the weak-rigidity elastic squirrel cage supporting seat is not changed, the sizes of the permanent magnet and the coil in the rotary vibration exciter can be reduced, and the cost of test hardware is reduced.
5. According to the novel dynamic coefficient measuring device for the extrusion oil film damper, the taper sleeve and the conical surface of the weak-rigidity elastic squirrel cage supporting seat are mounted in a matched mode, so that the taper sleeve and the weak-rigidity elastic squirrel cage supporting seat form a rigid body, the excitation force of the rotary vibration exciter is ensured to be accurately transmitted to the oil film of the extrusion oil film damper, and the dynamic coefficient identification precision is improved.
6. According to the novel dynamic coefficient measuring device for the extrusion oil film damper, the oil guiding ring at the front end of the squirrel cage can smoothly guide the lubricating oil at the side of the squirrel cage into the lubricating oil collecting tank, so that the damage of the rotary vibration exciter is avoided.
7. The dynamic coefficient measuring device for the novel extrusion oil film damper provided by the invention has the advantages that the front end oil guide ring of the squirrel cage is processed by polytetrafluoroethylene, and the structural excitation force frequency domain calculation result is not affected after the front end oil guide ring is matched with the taper sleeve.
8. According to the novel dynamic coefficient measuring device for the extrusion oil film damper, the displacement sensor is connected with the connecting disc fixed at the end part through the support, and the included angle between the fixed hole positions of the two supports is strictly 90 degrees, so that the strict orthogonality of the measured displacement parameters is ensured.
9. According to the dynamic coefficient measuring device for the novel extrusion oil film damper, the dynamic force sensor is fixed by the straight groove lock nut through the double-end stud, and the spring washer is additionally arranged during installation, so that the straight groove lock nut is prevented from loosening in the excitation process, and the dynamic force sensor is ensured to fully, accurately and stably transmit excitation force outwards.
10. According to the novel dynamic coefficient measuring device for the extrusion oil film damper, the displacement sensor support can move on the connecting disc hole site with the fixed end part, the distance between the displacement sensor and the taper sleeve can be conveniently adjusted, and the flexibility of adjustment in the testing process is improved.
Drawings
FIG. 1 is an assembled elevation view of a test device;
FIG. 2 is a detailed cross-sectional view of a rotary exciter;
FIG. 3 is a detailed view of the dynamic force sensor installation;
FIG. 4 is a front cross-sectional view of the drogue;
FIG. 5 is a left cross-sectional view of FIG. 4;
FIG. 6 is a right side view of FIG. 1;
FIG. 7 is a top view of FIG. 1;
FIG. 8 is a schematic view of the structure of the outer ring bearing of the damper;
FIG. 9 is a schematic diagram of the oil supply to an squeeze film damper;
FIG. 10 is a front cross-sectional view of a weak stiffness resilient squirrel cage support;
FIG. 11 is a cross-sectional view of the cage bar of FIG. 10;
In the figure: the hydraulic damping device comprises a1 weak rigidity elastic squirrel cage supporting lower support, a2 weak rigidity elastic squirrel cage supporting lower support reinforcing rib plate, a3 weak rigidity elastic squirrel cage supporting upper support reinforcing rib plate, a 5 first full-thread stud nut mechanism, a 6 first washer, a 7 weak rigidity elastic squirrel cage supporting seat, a 8 second full-thread stud nut mechanism, a 9 second washer, a 10 oil film damper clearance adjusting ring, a 11 extruded oil film damper end seal ring, a 12 first stop washer, a 13 first locking round nut, a 14 rotary vibration exciter, a 15 double-headed stud, a 16 dynamic force sensor, a 17 spring washer, a 18 first groove locking nut, a 19 set screw, a 20 taper sleeve, a 21 second stop washer, a 22 second squirrel cage locking round nut, a 23 front end oil guide ring, a 24 damper outer ring supporting seat, a 25 damper outer ring supporting seat lower support reinforcing rib plate, a 26 damper outer ring supporting seat reinforcing rib plate, a 27 damper outer ring supporting seat upper support reinforcing rib plate, a 28 damper outer ring supporting seat reinforcing rib plate, a 29 lubricating oil collecting groove, a 30 third full-thread stud nut mechanism, a 31 displacement sensor bracket, a 32 displacement sensor bracket, a 33 oil return hole, a 34 oil hole sensor bracket, an oil return hole and a 35 damping device.
Detailed Description
The first embodiment is as follows: 1-11, the novel dynamic coefficient measuring device for the extrusion oil film damper is provided, and comprises an elastic squirrel cage supporting component, a damping ring supporting component, a weak-rigidity elastic squirrel cage supporting seat 7, an oil film damper gap adjusting ring 10, two extrusion oil film damper end sealing rings 11, a first stop washer 12, a first locking round nut 13, a rotary vibration exciter 14, four studs 15, four dynamic force sensors 16, a first slotted locking nut 18, a plurality of fixing screws 19, a taper sleeve 20, a second stop washer 21, a second locking round nut 22, a squirrel cage front end oil guiding ring 23, a damper outer ring supporting seat 24 and a displacement sensor component;
The elastic squirrel cage supporting component and the damping ring supporting component are arranged oppositely, the weak rigidity elastic squirrel cage supporting seat 7 is arranged on one side of the elastic squirrel cage supporting component facing the damping ring supporting component, one end of the weak rigidity elastic squirrel cage supporting seat 7 is arranged on the elastic squirrel cage supporting component through a plurality of second full thread stud nut mechanisms 8, a second gasket 9 is arranged between the contact surfaces of nuts in each second full thread stud nut mechanism 8 and the weak rigidity elastic squirrel cage supporting seat 7, an oil film damper clearance adjusting ring 10 is sleeved on the weak rigidity elastic squirrel cage supporting seat 7, the oil film damper clearance adjusting ring 10 is arranged in a matched manner with the weak rigidity elastic squirrel cage supporting seat 7 through a conical surface, the end of the oil film damper gap adjusting ring 10 far away from the elastic squirrel cage supporting component is provided with a first locking round nut 13, the first locking round nut 13 is sleeved on the weak rigidity elastic squirrel cage supporting seat 7, the contact surface of the weak rigidity elastic squirrel cage supporting seat 7 and the first locking round nut 13 is provided with external threads, the first locking round nut 13 is in threaded connection with the weak rigidity elastic squirrel cage supporting seat 7, the oil film damper gap adjusting ring 10 is tightly connected with the weak rigidity elastic squirrel cage supporting seat 7 through the first locking round nut 13, a first stop washer 12 is arranged between the oil film damper gap adjusting ring 10 and the weak rigidity elastic squirrel cage supporting seat 7, two extrusion oil film damper end sealing rings 11 are embedded on the outer circular surface of the oil film damper gap adjusting ring 10 along the axial extension direction of the oil film damper gap adjusting ring 10, the taper sleeve 20 is arranged in the weak rigidity elastic squirrel cage supporting seat 7, the taper sleeve 20 is matched with an inner spigot of the weak rigidity elastic squirrel cage supporting seat 7 through a conical surface, the other end of the weak rigidity elastic squirrel cage supporting seat 7 is provided with a second locking round nut 22, the second locking round nut 22 is sleeved on the taper sleeve 20, an external thread is processed on a contact surface of the taper sleeve 20 and the second locking round nut 22, the second locking round nut 22 is in threaded connection with the taper sleeve 20, the taper sleeve 20 is in fastening connection with the weak rigidity elastic squirrel cage supporting seat 7 through a first locking round nut 13, a second stop washer 21 is arranged between the weak rigidity elastic squirrel cage supporting seat 7 and the taper sleeve 20, four dynamic force sensors 16 are circumferentially equidistantly arranged on an outer circular surface at the tail end of the rotary vibration exciter 14, each dynamic force sensor 16 is fixedly connected with the inner wall of the taper sleeve 20 through a double-end stud 15 and a linear groove lock nut 18, a squirrel cage front end oil guide ring 23 is arranged at one end of the taper sleeve 20 close to the elastic squirrel cage supporting component, the squirrel cage front end oil guide ring 23 is fixedly connected with the taper sleeve 20 through a plurality of fixing screws 19, a damper outer ring supporting seat 24 is arranged at one side of the damper outer ring supporting component facing the elastic squirrel cage supporting component, one end of the damper outer ring supporting seat 24 is arranged on the damper outer ring supporting component through a plurality of third full thread stud nut mechanisms 30, a third washer is arranged between the contact surfaces of nuts in each third full thread stud nut mechanism 30 and the damper outer ring supporting seat 24, the damper outer ring supporting seat 24 and the weak rigidity elastic squirrel cage supporting seat 7 are arranged in a through shaft mode, the other end of the damper outer ring supporting seat 24 is sleeved on the outer circular surface of the oil film damper gap adjusting ring 10, the displacement sensor assembly is arranged in the damper outer ring supporting seat 24, the connecting part of the displacement sensor assembly is arranged on the damping ring supporting assembly, and the probe part of the displacement sensor assembly is arranged in the taper sleeve 20.
In this embodiment, the inner ring of the damper is a weak rigidity elastic squirrel cage supporting seat 7, the rotary vibration exciter 14 is assembled with the weak rigidity elastic squirrel cage supporting seat 7 through the taper sleeve 20 by means of the dynamic force sensor 16 to form a rigid body structure, unbalanced excitation force generated during the operation of the rotary vibration exciter 14 is transmitted to the weak rigidity elastic squirrel cage supporting seat 7 through the dynamic force sensor 16, the excitation force transmitted from the rotary vibration exciter 14 to the weak rigidity elastic squirrel cage supporting seat 7 can be accurately measured through the dynamic force sensor 16, meanwhile, the vibration displacement of the weak rigidity elastic squirrel cage supporting seat 7 can be accurately measured by means of the displacement sensor component, and the distance between the displacement sensor component and the measured surface is adjusted to ensure the installation requirement of the displacement sensor. Because in an actual aeroengine and a gas turbine, exciting force is generated by high-speed rotation of a rotor and acts on the inner ring of the damper, the exciting force applied to the extrusion oil film damper in the device comes from unbalanced force of the rotary vibration exciter, the stress condition of the extrusion oil film damper is more fit with the actual condition, and the amplitude, the phase and the frequency of the exciting force can be rapidly changed.
The second embodiment is as follows: the present embodiment is further limited by the elastic squirrel cage supporting assembly according to the first embodiment, and the elastic squirrel cage supporting assembly includes a weak rigidity elastic squirrel cage supporting lower support 1, a plurality of weak rigidity elastic squirrel cage supporting lower support reinforcing ribs 2, a weak rigidity elastic squirrel cage supporting upper support 3, a plurality of weak rigidity elastic squirrel cage supporting upper support reinforcing ribs 4, a plurality of first full thread stud nut mechanisms 5 and a plurality of first washers 6;
The weak rigidity elastic squirrel cage supporting lower support 1 is arranged below the weak rigidity elastic squirrel cage supporting upper support 3, the weak rigidity elastic squirrel cage supporting lower support 1 is tightly connected with the weak rigidity elastic squirrel cage supporting upper support 3 through a plurality of first full-thread stud nut mechanisms 5, a first gasket 6 is arranged between the contact surface of the nut in each first full-thread stud nut mechanism 5 and the weak rigidity elastic squirrel cage supporting lower support 1, a plurality of weak rigidity elastic squirrel cage supporting lower support reinforcing rib plates 2 are equally divided into two groups, the two groups of weak rigidity elastic squirrel cage supporting lower support reinforcing rib plates 2 are oppositely arranged at two sides of the weak rigidity elastic squirrel cage supporting lower support 1, and each weak rigidity elastic squirrel cage supporting lower support reinforcing rib plate 2 in each group is fixedly connected with the side wall of the weak rigidity elastic squirrel cage supporting lower support 1 where the reinforcing rib plates are positioned, a plurality of weak rigidity elastic squirrel cage supporting upper support reinforcing rib plates 4 are arranged on one side of the weak rigidity elastic squirrel cage supporting upper support 3 far away from the damping ring supporting assembly, each weak rigidity elastic squirrel cage supporting upper support reinforcing rib plate 4 is fixedly connected with the weak rigidity elastic squirrel cage supporting upper support 3, and one end of the weak rigidity elastic squirrel cage supporting seat 7 is arranged on the weak rigidity elastic squirrel cage supporting upper support 3 through a plurality of second full-thread stud nut mechanisms 8. Other components and connection modes are the same as in the first embodiment.
And a third specific embodiment: the present embodiment is further limited to the damping ring support assembly according to the second embodiment, and includes a damper outer ring lower support 25, a plurality of damper outer ring lower support reinforcing ribs 26, a damper outer ring upper support 27, a plurality of damper outer ring upper support reinforcing ribs 28, a plurality of first full-thread stud nut mechanisms, and a plurality of first washers;
The damper outer ring lower support 25 is arranged below the damper outer ring upper support 27, the damper outer ring lower support 25 is fixedly connected with the damper outer ring upper support 27 through a plurality of first full-thread stud nut mechanisms, a first washer is arranged between the contact surfaces of nuts in each first full-thread stud nut mechanism and the damper outer ring lower support 25, the plurality of damper outer ring lower support reinforcing ribs 26 are equally divided into two groups, the two groups of damper outer ring lower support reinforcing ribs 26 are oppositely arranged on two sides of the damper outer ring lower support 25, each damper outer ring lower support reinforcing rib 26 in each group is fixedly connected with the side wall of the damper outer ring lower support 25 where the damper outer ring lower support reinforcing rib 26 is located, the plurality of damper outer ring upper support reinforcing ribs 28 are all arranged on one side of the damper outer ring upper support 27 far away from the elastic squirrel cage support assembly, and one end of each damper outer ring upper support reinforcing rib 28 is fixedly connected with the damper outer ring upper support 27 through a plurality of third full-thread stud nut mechanisms 30. Other components and connection modes are the same as those of the second embodiment.
The specific embodiment IV is as follows: the present embodiment is further limited to the rotary vibration exciter 14 according to the fourth embodiment, and in the present embodiment, the rotary vibration exciter 14 includes a rotary vibration exciter housing 14a, a plurality of rotary vibration exciter rotor balance disc holes 14b, a permanent magnet 14c, a stator coil 14d, an aviation connection terminal 14e, a rotary vibration exciter rotor 14f, a screw hole 14g, a rotary vibration exciter section opening 14h, and a double-headed screw 14i;
The rotary vibration exciter rotor 14f is inserted in the rotary vibration exciter housing 14a, the rotary vibration exciter rotor 14f is rotatably connected with the rotary vibration exciter housing 14a through two bearings at the head and the tail, a stator coil 14d is arranged on the inner wall of the rotary vibration exciter housing 14a, the outer wall of the stator coil 14d is fixedly connected with the inner wall of the rotary vibration exciter housing 14a, a permanent magnet 14c is sleeved at the corresponding position of the rotary vibration exciter rotor 14f and the inner wall of the stator coil 14d, a gap is arranged between the inner wall of the stator coil 14d and the rotary vibration exciter rotor 14f, one end of an aviation wiring terminal 14e is connected with the stator coil 14d, the other end of the aviation wiring terminal 14e penetrates through the rotary vibration exciter housing 14a and is connected with a power supply and a frequency converter, a balancing disc is sleeved at the tail end of the rotary vibration exciter rotor 14f, a plurality of rotary vibration exciter rotor balancing disc holes 14b are machined on one end face of the balancing disc in a circumferential equidistant mode, four screw holes 14g are machined on the outer circle face of the rotary vibration exciter housing 14a corresponding to the balancing disc in the circumferential direction, a double-end face of the balancing disc is provided with a dynamic vibration exciter 14h corresponding to the rotary vibration exciter rotor 14h, and a double-end face vibration exciter 14h is machined on the rotary vibration exciter rotor 14h corresponding to the rotary vibration exciter rotor 14 h. Other components and connection modes are the same as in the third embodiment.
In this embodiment, unbalanced masses are mounted on rotor balance disc holes 14b of different phases of a rotary vibration exciter, unbalanced excitation force generated by high-speed rotation of a rotor 14f of the rotary vibration exciter is transmitted to a soft stiffness elastic squirrel cage supporting seat 7 through a dynamic force sensor 16, the excitation force transmitted from the rotary vibration exciter to the soft stiffness elastic squirrel cage supporting seat can be accurately measured through the dynamic force sensor 16, the rotor 14f of the rotary vibration exciter is supported on a housing 14a of the rotary vibration exciter through a bearing, the rotor 14f of the rotary vibration exciter comprises a permanent magnet 14c, an outer stator coil 14d is fixed on the housing 14a of the rotary vibration exciter and corresponds to the permanent magnet 14c, the stator coil 14d is electrified through an aviation connection terminal 14e, the other end of the aviation connection terminal 14e is connected with a control module, the rotating speed of the rotor 14f of the rotary vibration exciter is accurately controlled, a mass block with a certain mass is mounted on a designated phase of the rotor balance disc hole 14b of the rotary vibration exciter through a section opening 14h of the rotary vibration exciter, and the unbalanced mass is applied.
Fifth embodiment: the present embodiment is further limited by the displacement sensor assembly described in the fourth embodiment, and in the present embodiment, the displacement sensor assembly includes a displacement sensor support connecting plate 31, a displacement sensor support 32 and a displacement sensor 33, a plurality of bolt holes 31a are machined on one end of the displacement sensor support connecting plate 31, a bolt 31b is disposed in each bolt hole 31a, a lock nut is sleeved on one end of each bolt 31b, the displacement sensor support connecting plate 31 is mounted on the damper outer ring upper support 27 in a matching manner through the plurality of bolts 31b and the lock nut, the displacement sensor support 32 is disposed on one side of the displacement sensor support connecting plate 31 facing the elastic squirrel cage support assembly, one end of the displacement sensor support 32 is fastened to the displacement sensor support connecting plate 31 through the bolt nut assembly, and the displacement sensor 33 is mounted on the other end of the displacement sensor support 32. Other compositions and connection modes are the same as those of the fourth embodiment.
In this embodiment, the displacement sensor support connecting plate 31 is installed at the outer end of the damper outer ring upper support 27, see fig. 6, and since the processed bolt holes are arc holes, the circumferential measurement direction of the displacement sensor can be conveniently and moderately adjusted, the two displacement sensors 33 are fixed at the ends of the two sensor supports 32, and are matched with the bolt holes 31a of the displacement sensor support connecting plate 31 by using the support matching bolts 31b, and since the bolt holes 31a are rectangular holes, the distance between the displacement sensor and the inner test surface of the taper sleeve 20 can be adjusted.
Specific embodiment six: referring to fig. 1 to 11, in this embodiment, the taper sleeve 20 according to the fifth embodiment is further limited, in this embodiment, four bolt blind holes 20b are machined on the taper sleeve and squirrel cage mating surface 20a at equal intervals along the circumferential direction, a lock nut is disposed in each bolt blind hole 20b, a dynamic force sensor mating spigot 20c is disposed at the bottom of each bolt blind hole 20b, each bolt blind hole 20b is disposed in communication with one dynamic force sensor mating spigot 20c, one end of each stud 15 is inserted into one dynamic force sensor 16, the other end of each stud 15 passes through one dynamic force sensor mating spigot 20c and is disposed in one bolt blind hole 20b and is fastened with a lock nut disposed in the bolt blind hole 20b, and each dynamic force sensor 16 is disposed in cooperation with one dynamic force sensor mating spigot 20 c. Other components and connection modes are the same as those of the fifth embodiment.
In this embodiment, the other ends of the four studs 15 are fixed to the cone sleeve by a linear groove lock nut 18 through a spring washer 17, and the rotary vibration exciter 14 and the cone sleeve 20 are mounted in a matched manner.
Seventh embodiment: the present embodiment is further limited by the elastic squirrel cage supporting assembly and the damping ring supporting assembly according to the fifth embodiment, in this embodiment, a lubricating oil collecting groove 29 is disposed between the elastic squirrel cage supporting assembly and the damping ring supporting assembly, one end of the lubricating oil collecting groove 29 is detachably connected with the elastic squirrel cage supporting lower support 1 with weak rigidity, the other end of the lubricating oil collecting groove 29 is detachably connected with the damper outer ring lower support 25, and an oil return hole 34 is formed at the bottom of the lubricating oil collecting groove 29. Other components and connection modes are the same as those of the fifth embodiment.
In the present embodiment, the squirrel cage front end oil guide ring 23 made of polytetrafluoroethylene is fixed to the end of the cone sleeve 20 by the fixing screw 19, so that the oil flowing out of the left end of the oil film damper clearance adjustment ring 10 is squeezed and collected, guided into the oil collection groove 29 at the bottom, and then the oil is circulated to the oil storage tank from the oil return hole 34.
Eighth embodiment: referring to fig. 1 to 11, in this embodiment, the damper outer ring supporting seat 24 in the fifth embodiment is further limited, in this embodiment, the damper outer ring supporting seat 24 includes a transparent sleeve 24a and a metal cone 24b, one end of the transparent sleeve 24a is fixedly connected with a small spigot end of the metal cone 24b, a large spigot end of the metal cone 24b is mounted on the damper outer ring upper supporting seat 27 through a plurality of third full-thread stud nut mechanisms 30, and an outer circular surface of the small spigot end of the metal cone 24b is provided with a damper outer ring supporting seat oil leakage hole 35. Other components and connection modes are the same as those of the fifth embodiment.
In the embodiment, the damper outer ring support seat adopts a mode of combining the metal cone 24b and the transparent sleeve 24a, and the part of the oil film region is of a transparent structure, so that the rigidity of the damper outer ring support seat in the test process is ensured, and the real-time observation of the cavitation phenomenon of the oil film in the test process can be realized.
Detailed description nine: the present embodiment is further limited to the transparent sleeve 24a described in the fifth embodiment, and the transparent sleeve 24a is made of polycarbonate in the present embodiment, as described with reference to fig. 1 to 11. Other components and connection modes are the same as those of the fifth embodiment.
Detailed description ten: referring to fig. 1 to 11, in this embodiment, the oil film damper gap adjusting ring 10 according to the fifth embodiment is further limited, in this embodiment, a plurality of oil film damper inner ring oil supply holes 10a are machined on one end of the oil film damper gap adjusting ring 10, which is close to the elastic squirrel cage supporting assembly, at equal intervals in the circumferential direction, and the end of each oil film damper inner ring oil supply hole 10a is communicated with an oil film damper oil supply groove 10c on the outer circumferential surface of the oil film damper gap adjusting ring 10 through an oil running pipe, and an oil film damper effective oil film region 10b is formed on one side of the oil film damper oil supply groove 10c, which is close to the elastic squirrel cage supporting assembly. Other components and connection modes are the same as those of the fifth embodiment.
By means of the arrangement, the oil film damper inner ring oil supply hole 10a at the end of the extrusion oil film damper gap adjusting ring 10 is connected through equipment such as an external oil pump and the like, and lubricating oil is sent into the extrusion oil film damper oil supply groove 10c, so that the effective oil film area 10b of the extrusion oil film damper is filled with the lubricating oil, and an effective oil film is formed.
The present invention has been described in terms of preferred embodiments, but is not limited to the above-described embodiments, and any simple modification, equivalent changes and variation of the above-described embodiments according to the technical principles of the present invention will be within the scope of the present invention when the above-described structures and technical principles can be utilized to make a few equivalent embodiments without departing from the technical scope of the present invention.
Claims (9)
1. The utility model provides a novel extrusion oil film damper dynamic coefficient measurement device which characterized in that: the measuring device comprises an elastic squirrel cage supporting component, a damping ring supporting component, a weak rigidity elastic squirrel cage supporting seat (7), an oil film damper clearance adjusting ring (10), two extrusion oil film damper end sealing rings (11), a first stop washer (12), a first locking round nut (13), a rotary vibration exciter (14), four studs (15), four dynamic force sensors (16), four linear groove locking nuts (18), a plurality of fixing screws (19), a taper sleeve (20), a second stop washer (21), a second locking round nut (22), a squirrel cage front end oil guiding ring (23), a damper outer ring supporting seat (24) and a displacement sensor component;
The elastic squirrel cage supporting component and the damping ring supporting component are arranged oppositely, the weak rigidity elastic squirrel cage supporting component (7) is arranged on one side of the elastic squirrel cage supporting component facing the damping ring supporting component, one end of the weak rigidity elastic squirrel cage supporting component (7) is arranged on the elastic squirrel cage supporting component through a plurality of second full-thread stud nut mechanisms (8), a second gasket (9) is arranged between the contact surface of the nut in each second full-thread stud nut mechanism (8) and the weak rigidity elastic squirrel cage supporting component (7), an oil film damper gap adjusting ring (10) is sleeved on the weak rigidity elastic squirrel cage supporting component (7), the oil film damper gap adjusting ring (10) is matched with the weak rigidity elastic squirrel cage supporting component (7) through a conical surface, one end of the oil film damper gap adjusting ring (10) far away from the elastic squirrel cage supporting component is provided with a first locking round nut (13), the first locking round nut (13) is sleeved on the weak rigidity elastic squirrel cage supporting seat (7), an external thread is processed on the contact surface of the weak rigidity elastic squirrel cage supporting seat (7) and the first locking round nut (13), the first locking round nut (13) is in threaded connection with the weak rigidity elastic squirrel cage supporting seat (7), the oil film damper gap adjusting ring (10) is fixedly connected with the weak rigidity elastic squirrel cage supporting seat (7) through the first locking round nut (13), a first stop washer (12) is arranged between the oil film damper gap adjusting ring (10) and the weak rigidity elastic squirrel cage supporting seat (7), two extrusion oil film damper end seal rings (11) are embedded on the outer circular surface of the oil film damper gap adjusting ring (10) along the axial extension direction of the oil film damper gap adjusting ring (10), each extrusion oil film damper end seal ring (11) is arranged close to one end of the oil film damper gap adjusting ring (10), a taper sleeve (20) is arranged in a weak rigidity elastic squirrel cage supporting seat (7), the taper sleeve (20) is matched with an inner spigot of the weak rigidity elastic squirrel cage supporting seat (7) through a conical surface, a second locking round nut (22) is arranged at the other end of the weak rigidity elastic squirrel cage supporting seat (7), the second locking round nut (22) is sleeved on the taper sleeve (20), the contact surface of the taper sleeve (20) and the second locking round nut (22) is provided with external threads, the second locking round nut (22) is in threaded connection with the taper sleeve (20), the taper sleeve (20) is in fastening connection with the weak rigidity elastic squirrel cage supporting seat (7) through the second locking round nut (22), a second stop washer (21) is arranged between the right end surface of the weak rigidity elastic squirrel cage supporting seat (7) and the second locking round nut (22), four dynamic force sensors (16) are circumferentially equidistantly arranged on the outer circular surface at the tail end of the rotary vibration exciter (14), each dynamic force sensor (16) is in fastening connection with the inner wall of the taper sleeve (20) through a double-end stud (15) and a straight-groove locking nut (18), the squirrel cage front end oil guide ring (23) is arranged at one end of the taper sleeve (20) close to the elastic squirrel cage supporting assembly, the squirrel cage front end oil guide ring (23) is fixedly connected with the taper sleeve (20) through a plurality of fixing screws (19), the damper outer ring supporting seat (24) is arranged at one side of the damping ring supporting assembly facing the elastic squirrel cage supporting assembly, one end of the damper outer ring supporting seat (24) is arranged on the damping ring supporting assembly through a plurality of three-number full-thread stud nut mechanisms (30), a three-number washer is arranged between the contact surface of a nut in each three-number full-thread stud nut mechanism (30) and the damper outer ring supporting seat (24), the damper outer ring supporting seat (24) and the weak rigidity elastic squirrel cage supporting seat (7) are arranged in a through shaft mode, the other end of the damper outer ring supporting seat (24) is sleeved on the outer circular surface of the oil film damper gap adjusting ring (10), the displacement sensor assembly is arranged in the damper outer ring supporting seat (24), the connecting part of the displacement sensor assembly is arranged on the damping ring supporting assembly, and the contact part of the displacement sensor assembly is arranged in the taper sleeve (20).
2. The novel extrusion oil film damper dynamic coefficient measuring device as claimed in claim 1, wherein: the elastic squirrel cage supporting assembly comprises a weak-rigidity elastic squirrel cage supporting lower support (1), a plurality of weak-rigidity elastic squirrel cage supporting lower support reinforcing rib plates (2), a weak-rigidity elastic squirrel cage supporting upper support (3), a plurality of weak-rigidity elastic squirrel cage supporting upper support reinforcing rib plates (4), a plurality of first-number full-thread stud nut mechanisms (5) and a plurality of first-number gaskets (6);
The weak rigidity elastic squirrel cage supporting lower support (1) is arranged below the weak rigidity elastic squirrel cage supporting upper support (3), the weak rigidity elastic squirrel cage supporting lower support (1) is fixedly connected with the weak rigidity elastic squirrel cage supporting upper support (3) through a plurality of first full-thread stud nut mechanisms (5), a first gasket (6) is arranged between the contact surface of the nut in each first full-thread stud nut mechanism (5) and the weak rigidity elastic squirrel cage supporting lower support (1), a plurality of weak rigidity elastic squirrel cage supporting lower support reinforcing rib plates (2) are equally divided into two groups, the two groups of weak rigidity elastic squirrel cage supporting lower support reinforcing rib plates (2) are oppositely arranged at two sides of the weak rigidity elastic squirrel cage supporting lower support (1), and each weak rigidity elastic squirrel cage supporting lower support reinforcing rib plate (2) in each group is fixedly connected with the side wall of the weak rigidity elastic squirrel cage supporting lower support (1) where the reinforcing rib plates are positioned, a plurality of weak rigidity elastic squirrel cage supporting upper support reinforcing rib plates (4) are arranged on one side of the weak rigidity elastic squirrel cage supporting upper support (3) far away from the damping ring supporting assembly, each weak rigidity elastic squirrel cage supporting upper support reinforcing rib plate (4) is fixedly connected with the weak rigidity elastic squirrel cage supporting upper support (3), and one end of the weak rigidity elastic squirrel cage supporting seat (7) is installed on the weak rigidity elastic squirrel cage supporting upper support (3) through a plurality of second full-thread stud nut mechanisms (8).
3. The novel extrusion oil film damper dynamic coefficient measuring device as claimed in claim 2, wherein: the damping ring supporting assembly comprises a damper outer ring lower support (25), a plurality of damper outer ring lower support reinforcing ribs (26), a damper outer ring upper support (27), a plurality of damper outer ring upper support reinforcing ribs (28), a plurality of fourth full-thread stud nut mechanisms and a plurality of fourth gaskets;
The damper outer ring lower support (25) is arranged below the damper outer ring upper support (27), the damper outer ring lower support (25) is fixedly connected with the damper outer ring upper support (27) through a plurality of four-number full-thread stud nut mechanisms, a four-number gasket is arranged between the contact surfaces of nuts in each four-number full-thread stud nut mechanism and the damper outer ring lower support (25), the plurality of damper outer ring lower support reinforcing ribs (26) are evenly divided into two groups, the two groups of damper outer ring lower support reinforcing ribs (26) are oppositely arranged on two sides of the damper outer ring lower support (25), each damper outer ring lower support reinforcing rib (26) in each group is fixedly connected with the side wall of the damper outer ring lower support (25), the plurality of damper outer ring upper support reinforcing ribs (28) are arranged on one side, far away from the elastic squirrel cage supporting component, of each damper outer ring upper support reinforcing rib (28) is fixedly connected with the damper outer ring upper support (27), and one end of the damper outer ring supporting support (24) is arranged on the damper outer ring upper support (30) through a plurality of three-number full-thread stud mechanisms.
4. A novel extrusion oil film damper dynamic coefficient measuring device as set forth in claim 3, wherein: the rotary vibration exciter (14) comprises a rotary vibration exciter shell (14 a), a plurality of rotary vibration exciter rotor balance disc holes (14 b), permanent magnets (14 c), stator coils (14 d), aviation connecting terminals (14 e), a rotary vibration exciter rotor (14 f), screw holes (14 g), rotary vibration exciter section openings (14 h) and double-headed screws (14 i);
The rotary vibration exciter rotor (14 f) is inserted into the rotary vibration exciter housing (14 a), the rotary vibration exciter rotor (14 f) is rotationally connected with the rotary vibration exciter housing (14 a) through two bearings at the head and the tail, a stator coil (14 d) is arranged on the inner wall of the rotary vibration exciter housing (14 a), the outer wall of the stator coil (14 d) is fixedly connected with the inner wall of the rotary vibration exciter housing (14 a), a permanent magnet (14 c) is sleeved at the corresponding position of the rotary vibration exciter rotor (14 f) and the inner wall of the stator coil (14 d), a gap is arranged between the inner wall of the stator coil (14 d) and the rotary vibration exciter rotor (14 f), one end of an aviation wiring terminal (14 e) is connected with the stator coil (14 d), the other end of the aviation wiring terminal (14 e) penetrates through the rotary vibration exciter housing (14 a) and is connected with a power supply, a balancing disc is sleeved at the tail end of the rotary vibration exciter rotor (14 f), a plurality of rotary vibration exciter rotors (14 b) are fixedly arranged on one end faces of the balancing disc along the circumferential direction, a plurality of rotary vibration exciter rotors (14 b) are sleeved on one end faces of the balancing disc along the circumferential direction, a plurality of screw holes (14 g) are formed in the circumferential direction of the balancing disc (14 b) and are arranged on one end face of each balancing disc (14 g) along each screw hole (14 i) through a screw hole (14 i), the outer circular surface of the rotary vibration exciter shell (14 a) corresponding to the balance disc is also provided with a rotary vibration exciter section opening (14 h), and the rotary vibration exciter section opening (14 h) is arranged corresponding to one balance disc hole (14 b).
5. The novel extrusion oil film damper dynamic coefficient measuring device according to claim 4, wherein: the displacement sensor assembly comprises a displacement sensor support connecting plate (31), a displacement sensor support (32) and a displacement sensor (33), a plurality of bolt holes (31 a) are formed in one end of the displacement sensor support connecting plate (31), a bolt (31 b) is arranged in each bolt hole (31 a), a lock nut is sleeved on one end of each bolt (31 b), the displacement sensor support connecting plate (31) is mounted on a damper outer ring upper support (27) in a matched mode through the bolts (31 b) and the lock nuts, the displacement sensor support (32) is arranged on one side, facing the elastic squirrel cage support assembly, of the displacement sensor support connecting plate (31), one end of the displacement sensor support (32) is fixedly connected with the displacement sensor support connecting plate (31) through the bolt nut assembly, and the displacement sensor (33) is mounted on the other end of the displacement sensor support (32).
6. The novel extrusion oil film damper dynamic coefficient measuring device according to claim 5, wherein: four bolt blind holes (20 b) are machined in the taper sleeve (20) and the squirrel cage matching surface (20 a) at equal intervals along the circumferential direction, a locking nut is arranged in each bolt blind hole (20 b), a dynamic force sensor matching spigot (20 c) is arranged at the bottom of each bolt blind hole (20 b), each bolt blind hole (20 b) is communicated with one dynamic force sensor matching spigot (20 c), one end of each stud (15) is inserted on one dynamic force sensor (16), and the other end of each stud (15) penetrates one dynamic force sensor matching spigot (20 c) and is arranged in one bolt blind hole (20 b) and is in fastening connection with the locking nut arranged in the bolt blind hole (20 b), and each dynamic force sensor (16) is matched with one dynamic force sensor matching spigot (20 c).
7. The novel extrusion oil film damper dynamic coefficient measuring device according to claim 5, wherein: an oil collecting groove (29) is formed between the elastic squirrel cage supporting assembly and the damping ring supporting assembly, one end of the oil collecting groove (29) is detachably connected with a weak rigidity elastic squirrel cage supporting lower support (1), the other end of the oil collecting groove (29) is detachably connected with an outer ring lower support (25) of the damper, an oil return hole (34) is formed in the bottom of the oil collecting groove (29), the outer ring supporting seat (24) of the damper comprises a transparent sleeve (24 a) and a metal cone (24 b), one end of the transparent sleeve (24 a) is fixedly connected with a small spigot end of the metal cone (24 b), a large spigot end of the metal cone (24 b) is mounted on the outer ring upper support (27) of the damper through a plurality of three-number full-thread stud nut mechanisms (30), and an outer ring supporting seat oil leakage hole (35) of the damper is formed in the outer circular surface of the small spigot end of the metal cone (24 b).
8. The novel extrusion oil film damper dynamic coefficient measuring device as set forth in claim 7, wherein: the transparent sleeve (24 a) is made of polycarbonate.
9. The novel extrusion oil film damper dynamic coefficient measuring device according to claim 5, wherein: a plurality of oil film damper inner ring oil supply holes (10 a) are formed in one end, close to the elastic squirrel cage supporting assembly, of the oil film damper gap adjusting ring (10) at equal intervals along the circumferential direction, the tail end of each oil film damper inner ring oil supply hole (10 a) is communicated with an extrusion oil film damper oil supply groove (10 c) in the outer circular surface of the oil film damper gap adjusting ring (10) through an oil running pipe, and extrusion oil film gaps are formed between the outer surface of the oil film damper gap adjusting ring (10) and the inner surface of the damper outer ring supporting seat (24).
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| CN105675276A (en) * | 2016-01-13 | 2016-06-15 | 中国航空动力机械研究所 | Device and method for testing vibration damping property of elastic support extruded oil film damper |
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| CN2769611Y (en) * | 2004-11-04 | 2006-04-05 | 北京航空航天大学 | Adaptive squeezing oil film damper with metal rubber external ring |
| CN106353076A (en) * | 2016-07-07 | 2017-01-25 | 大连海事大学 | Tester for determining dynamic characteristic coefficient of squeeze film damper |
| US10094420B1 (en) * | 2017-03-27 | 2018-10-09 | United Technologies Corporation | Squeeze film damper with low pressure reservoirs |
| CN106989917A (en) * | 2017-06-01 | 2017-07-28 | 中国航发湖南动力机械研究所 | Flexibly support the dynamic stiffness measurement device and its measuring method of squeeze film damper |
| CN109752171B (en) * | 2018-12-17 | 2020-07-28 | 南京航空航天大学 | Bidirectional excitation tester for measuring inner layer oil pressure of floating ring type squeeze film damper |
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| CN105675276A (en) * | 2016-01-13 | 2016-06-15 | 中国航空动力机械研究所 | Device and method for testing vibration damping property of elastic support extruded oil film damper |
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| Title |
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| 弹性环式挤压油膜阻尼器动力学特性系数测试;王震林 等;《航空动力学报》;20190731;第1542-1550 * |
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