A squeeze film damper rotor bearing test device

Abstract

The present invention relates to a test device for a rotor bearing of a squeeze film damper, comprising: a main shaft driving part, a swing arm, a hanging basket and a test bench, wherein a main shaft motor arranged on a support is fixedly connected to the center of the swing arm through a first coupling, and both ends of the swing arm are movably connected to a hanging basket, and a test bench is arranged in the hanging basket, comprising: a test bench base, a motor support, a test bench motor arranged in the motor support, a bearing support, a wireless sensor and a counterweight plate arranged on one side of the bearing support, and the two bearing supports are both installed with the tested bearings, and the test bench motor is connected to the two tested bearings and the counterweight plate through a second coupling. The present invention can better detect the life and working state of the bearing in a weightless centrifugal state when the drone and other flying maneuvers are in flight by simulating the working state of the bearing in the actual unmanned aerial vehicle flight maneuvering state, combined with the data provided by the wireless sensor, and has the advantages of reliable results, simple structure, easy replacement of accessories, and high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of bearing dynamic characteristic testing, and in particular to a squeeze film damper rotor bearing testing device. Background Art

[0002] The dynamic characteristics of the bearing have an important influence on the dynamic characteristics of the rotor-bearing system. In the rotor dynamics analysis, the dynamic characteristics of the bearing (equivalent stiffness and equivalent damping) have a very important influence when dealing with problems such as critical speed estimation, unbalance response calculation and dynamic optimization design.

[0003] The safety and stability of rotor operation are key issues in product design and development. During operation, the rotor is often subjected to the combined effects of pressure, centrifugal force and unstable fluid excitation, causing violent vibrations and corresponding noise. Severe cases can cause resonance. In order to solve the safety and stability problems of the rotor, the rotor must be dynamically tested. The vibration of the rotor bearing reflects the balance of the rotor to a certain extent, which is related to the stability and life of the rotor operation.

[0004] In some tests in the past, either the test results obtained in the bearing static non-rotating state or the rotating test in the non-centrifugal state were not accurate enough. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In order to solve the above problems in the prior art, the present invention provides a squeeze film damper rotor bearing testing device, which can simulate the working state of the bearing in the actual UAV flight maneuvering state, and combined with the data provided by the wireless sensor, can better detect the life, working state, etc. of the bearing in the weightless centrifugal state.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] A squeeze film damper rotor bearing test device: comprising: a main shaft drive part, a swing arm, a hanging basket and a test bench;

[0010] The spindle driving part includes: a support, a spindle motor arranged on the support, a spindle, and a first coupling;

[0011] The first coupling includes an upper coupling and a lower coupling;

[0012] The upper coupling and the lower coupling are separated by a rubber pad and connected and fixed by an insulating pin. The other end of the upper coupling is fixedly connected to the main shaft, and the other end of the lower coupling is fixedly connected to the main shaft motor.

[0013] The other end of the main shaft is fixedly connected to the center of the swing arm, and both ends of the swing arm are movably connected to a hanging basket, and a test bench is arranged in the hanging basket;

[0014] The test bench includes: a test bench base, a motor support, a test bench motor arranged in the motor support, a bearing support, a wireless sensor and a counterweight plate arranged on one side of the bearing support;

[0015] There are two bearing supports, and the counterweight plate is arranged between the two bearing supports;

[0016] The measured bearings are installed in the two bearing supports, and the test bench motor is connected with the two measured bearings and the counterweight plate through the second coupling.

[0017] The present invention drives the swing arm to rotate through the spindle motor to produce a motorized centrifugal effect, so that the hanging basket connected to the swing arm is thrown up at a certain angle, thereby simulating the working condition of the bearing in a motorized centrifugal state, and then simulating the rotation of the bearing through the test bench motor to simulate the working condition of the bearing in the actual unmanned aerial vehicle flight maneuvering state. Combined with the data provided by the wireless sensor, the life and working condition of the bearing in the weightless centrifugal state can be better detected, and the reliability of the bearings in the flight maneuvering state of aviation and unmanned aerial vehicles can be better detected.

[0018] Optionally, a bearing oil supply device is provided on the top of the bearing support.

[0019] Optionally, a radial hydraulic device, an axial hydraulic device and a vibration exciter are also provided on one side of the bearing support.

[0020] The bearing oil supply device installed on the top of the bearing support is used to add lubricating oil to the squeeze film damper in the tested bearing; the axial hydraulic device provides radial force, and together with the counterweight plate simulates the load of the bearing in working state; the exciter simulates the vibration generated by the bearing in maneuvering state; the radial hydraulic device should adopt symmetrical loading to prevent overturning moment.

[0021] Optionally, a brush is provided under the swing arm, and the brush is an upper and lower double ring structure, the upper ring of the brush contacts the bottom surface of the swing arm, and the lower ring of the brush contacts the main shaft.

[0022] Optionally, four brackets are evenly arranged below the brush for supporting the brush, and the brackets are made of insulating material.

[0023] When the squeeze film damper rotor bearing test device of the present invention is in working state, the swing arm will drive the test bench to be in a rotating state. Directly supplying power to the test bench motor with wires will cause the wires to be entangled, so brushes are used to contact the main shaft and the swing arm respectively to indirectly supply power to the test bench, so that the test bench motor rotates for testing. At the same time, the upper coupling and the lower coupling of the first coupling are fixed with insulating pins and separated by rubber pads to prevent the electricity of the brushes from being conducted to the spindle motor and damaging the spindle motor. Four evenly arranged brackets are used to support the brushes to a certain height.

[0024] Optionally, a protective cover is provided on the outside of the counterweight plate.

[0025] When the test bench of the present invention is in working state, the test bench motor is in high-speed rotation state, the counterweight plate will rotate synchronously at high speed, and a protective cover is added to the outer side of the counterweight plate to prevent the counterweight plate from derailing and causing injuries to personnel.

[0026] Optionally, the motor support, the two bearing supports, and the protective cover are all connected to the experimental table base via slide rails and positioned via locating pins.

[0027] The motor support, bearing support, protective cover, etc. are all connected to the base of the experimental table through slide rails. This design can adjust the position of each support, change the position of the tested bearing and the counterweight plate, and can simulate the bearings and counterweights of various drones for experimental testing.

[0028] Optionally, the swing arm is movably connected to the hanging basket, the swing arm is connected to the hanging basket via a pin shaft, and the hanging basket can swing around the pin shaft.

[0029] (III) Beneficial effects

[0030] The beneficial effects of the present invention are:

[0031] The squeeze film damper rotor bearing testing device of the present invention drives the swing arm to rotate through the main shaft motor to produce a motorized centrifugal effect, so that the hanging basket connected to the swing arm is thrown up at a certain angle, simulating the working condition of the bearing in a motorized centrifugal state, and then simulates the rotation of the bearing through the test bench motor to simulate the working condition of the bearing in an actual unmanned aerial vehicle flight maneuvering state. Combined with the data provided by the wireless sensor, the life and working condition of the bearing in a weightless centrifugal state can be better detected. The reliability of bearings in a flight maneuvering state such as aviation and unmanned aerial vehicles can be better detected, and it has the advantages of multi-function, simple structure, easy replacement of accessories, and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an embodiment of a squeeze film damper rotor bearing testing device of the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the brush;

[0034] Figure 3 for Figure 1 A top view of

[0035] Figure 4 for Figure 1 Schematic diagram of the experimental platform structure.

[0036] [Description of Reference Numerals]

[0037] 11: support; 12: spindle motor; 13: spindle; 14: upper coupling; 15: lower coupling; 16: rubber pad; 17: insulating pin;

[0038] 2: Swing arm;

[0039] 3: hanging basket;

[0040] 31: pin;

[0041] 41: lab bench base; 42: motor support; 43: lab bench motor; 44: bearing support; 45: bearing oil supply device; 46: wireless sensor; 47: counterweight plate; 48: protective cover;

[0042] 5: Brush;

[0043] 6: Bracket. DETAILED DESCRIPTION

[0044] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0045] Example

[0046] like Figure 1-Figure 4As shown, this embodiment discloses a squeeze film damper rotor bearing test device, including: a spindle drive part, a swing arm 2, a hanging basket 3 and a test bench, the spindle drive part includes: a support 11, a spindle motor 12 arranged on the support 11, a spindle 13, and a first coupling, the first coupling includes an upper coupling 14 and a lower coupling 15, a rubber pad 16 is arranged between the upper coupling 14 and the lower coupling 15 to separate them, and they are connected and fixed by an insulating pin 17, the other end of the upper coupling 14 is fixedly connected to the spindle 13, the other end of the lower coupling 15 is fixedly connected to the spindle motor 12, and the other end of the spindle 13 is fixedly connected to the center of the swing arm 2 , both ends of the swing arm 2 are movably connected to a hanging basket 3, the swing arm 2 is connected to the hanging basket 3 through a pin shaft 31, the hanging basket 3 can swing around the pin shaft 31, and a test bench is provided in the hanging basket 3, the test bench includes: a test bench base 41, a motor support 42, a test bench motor 43 arranged in the motor support 42, a bearing support 44, a wireless sensor 46 and a counterweight plate 47 arranged on one side of the bearing support 44, the bearing support 44 is two, the counterweight plate 47 is arranged between the two bearing supports 44, the two bearing supports 44 are both installed with the measured bearings, the test bench motor 43 is connected to the two measured bearings and the counterweight plate 47 through a second coupling.

[0047] The squeeze film damper rotor bearing testing device of the present invention drives the main shaft 13 to drive the swing arm 2 to rotate through the main shaft motor 12, and the swing arm 2 drives the hanging basket 3 to swing up a certain angle, thereby simulating the working condition of the bearing in a maneuverable centrifugal state. The test bench motor 43 drives the tested bearing to rotate, thereby simulating the working condition of the bearing in an actual unmanned aerial vehicle flight maneuverable state. Combined with the data provided by the wireless sensor, the working condition and life of the bearing in a weightless centrifugal state are detected.

[0048] A bearing oil supply device 45 is disposed on the top of the bearing support 44 , and a radial hydraulic device, an axial hydraulic device, and a vibrator are also disposed on one side of the bearing support 44 .

[0049] The bearing to be tested inside the bearing support 44 of the present invention is a squeeze film damper rotor bearing. The bearing oil supply device 45 arranged on the top of the bearing support 44 is used to add lubricating oil to the squeeze film damper in the bearing to be tested. The axial hydraulic device provides radial force, and works together with the counterweight plate 47 to simulate the load of the rotor bearing in the working state. The exciter simulates the vibration generated by the rotor bearing when the drone is in a flight maneuvering state. The radial hydraulic device should adopt symmetrical loading to prevent overturning moment.

[0050] A brush 5 is arranged below the swing arm 2. The brush 5 is an upper and lower double ring structure. The upper ring of the brush 5 contacts the bottom surface of the swing arm 2, and the lower ring of the brush 5 contacts the main shaft 13. Four brackets 6 are evenly arranged below the brush 5 for supporting the brush 5. The brackets 6 are made of insulating material.

[0051] When the swing arm 2 of the present invention is in working state, it is driven by the spindle motor 12 to make rotational motion. Using wires to directly supply power to the experimental bench motor 43 will cause wire entanglement. Therefore, the brush 5 is used to contact the spindle 13 and the swing arm 2 respectively, and power is supplied to the experimental bench indirectly, so that the experimental bench motor 43 rotates for experiment. At the same time, the upper coupling 14 and the lower coupling 15 of the first coupling are separated by a rubber pad 16 and fixedly connected by a plurality of insulating pins 17, which can prevent the electricity of the brush 5 from being conducted to the spindle motor 12 and damaging the spindle motor 12. The brush 5 is supported to the required height by a bracket 6, and the bracket 6 is made of insulating lightweight material. The bracket 6 is only used to support the brush 5 in contact with the swing arm 2 and the spindle 13, and is not affected by other forces.

[0052] A protective cover 48 is disposed outside the counterweight plate 47 .

[0053] The squeeze film damper rotor bearing test device of the present invention, the counterweight plate 47 is detachably arranged on the second coupling, and the states of different loads of the rotor bearing can be simulated by changing the weight of the counterweight plate 47. When working, the test bench motor 43 is in a high-speed rotation state. Driven by the second coupling, the counterweight plate 47 will rotate synchronously at a high speed. In order to prevent the counterweight plate 47 from derailing and flying out to cause harm to personnel, a protective cover 48 is arranged on the outside of the counterweight plate 47 to prevent accidents.

[0054] like Figure 4 As shown, the motor support 42, the two bearing supports 44, and the protective cover 48 are all connected to the experimental table base 41 through slide rails and positioned by positioning pins.

[0055] The experimental bench support 41 is fixedly installed on the hanging basket 3, and the motor support 42, the two bearing supports 44, and the protective cover 48 are connected to the experimental bench support 41 through slide rails and positioned by locating pins. This setting method can adjust the positions of the motor support 42, the two bearing supports 44, and the counterweight plate 47. Changing the positions of the two bearing supports 44 can simulate the conditions of different UAV bearing position designs. The counterweight plate 47 can increase or decrease weight to simulate different counterweight conditions, and the position of the counterweight plate 47 can also be adjusted to simulate the condition that the rotor bearing of the squeeze film damper is in a static eccentric state. This design can simulate the working state of the rotor bearing of the UAV in various different states.

[0056] The squeeze film damper rotor bearing test device of the present invention is powered by two power supply devices, one of which supplies power to the spindle motor 12, and the other indirectly supplies power to the test bench through the brush 5, so that the test bench motor 43 rotates;

[0057] During the experiment, the spindle motor 12 is first powered, and the swing arm 2 is driven to rotate through the spindle 13, and the swing arm 2 drives the hanging basket 3 to swing up a certain angle to simulate the working condition of the rotor bearing in a maneuverable centrifugal state, and then the experimental bench motor 43 is powered through the brush 5 to drive the measured bearing to rotate, simulating the working condition of the rotor bearing in the actual unmanned aerial vehicle flight maneuvering state, and then the displacement, vibration and other data of the measured bearing are transmitted to the computer through the wireless sensor 46 for analysis and calculation, and the life and working condition of the bearing in a weightless centrifugal state are detected, so that the reliability of the rotor bearing in a maneuverable flight state such as aviation and unmanned aerial vehicles can be better detected. The present application has a simple structure, and each accessory is easy to replace. It can simulate the working condition of the rotor bearing of the squeeze film damper of the unmanned aerial vehicle in various different states, and can reliably detect the life and working condition of the rotor bearing of the squeeze film damper of the unmanned aerial vehicle in a weightless centrifugal state. The present invention has the advantages of multi-function, simple structure, easy replacement of accessories and high efficiency.

[0058] The technical principles of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, those skilled in the art can associate other specific implementations of the present invention without creative work, and these methods will fall within the scope of protection of the present invention.

Claims

1. A squeeze film damper rotor bearing test device, characterized in that: include: A spindle drive part, a swing arm (2), a hanging basket (3) and a test bench; The spindle drive part comprises: a support (11), a spindle motor (12) arranged on the support (11), a spindle (13), and a first coupling; The first coupling comprises an upper coupling (14) and a lower coupling (15); The upper coupling (14) and the lower coupling (15) are separated by a rubber pad (16) and are connected and fixed by an insulating pin (17); the other end of the upper coupling (14) is fixedly connected to the main shaft (13), and the other end of the lower coupling (15) is fixedly connected to the main shaft motor (12); The other end of the main shaft (13) is fixedly connected to the center of the swing arm (2), and both ends of the swing arm (2) are movably connected to a hanging basket (3), and a laboratory table is provided in the hanging basket (3); The experimental platform comprises: an experimental platform base (41), a motor support (42), an experimental platform motor (43) arranged in the motor support (42), a bearing support (44), a wireless sensor (46) arranged on one side of the bearing support (44), and a counterweight plate (47); There are two bearing supports (44), and the counterweight plate (47) is arranged between the two bearing supports (44); The two bearing supports (44) are each equipped with a bearing to be tested, and the test bench motor (43) is connected to the two bearings to be tested and the counterweight plate (47) via a second coupling; A radial hydraulic device, an axial hydraulic device, and a vibrator are also provided on one side of the bearing support (44).

2. The squeeze film damper rotor bearing test device according to claim 1, characterized in that: A bearing oil supply device (45) is provided on the top of each bearing support (44).

3. The squeeze film damper rotor bearing test device according to claim 1, characterized in that: A brush (5) is arranged below the swing arm (2), and the brush (5) is an upper and lower double ring structure, the upper ring of the brush (5) contacts the bottom surface of the swing arm (2), and the lower ring of the brush (5) contacts the main shaft (13).

4. The squeeze film damper rotor bearing test device according to claim 3, characterized in that: Four brackets (6) are evenly arranged below the brush (5) for supporting the brush (5), and the brackets (6) are made of insulating material.

5. The squeeze film damper rotor bearing test device according to claim 1, characterized in that: A protective cover (48) is disposed outside the counterweight plate (47).

6. The squeeze film damper rotor bearing test device according to claim 5, characterized in that: The motor support (42), the two bearing supports (44), and the protective sleeve (48) are all connected to the experimental table base (41) via slide rails and are positioned via positioning pins.

7. The squeeze film damper rotor bearing test device according to claim 1, characterized in that: The swing arm (2) is movably connected to the hanging basket (3); the swing arm (2) is connected to the hanging basket (3) via a pin shaft (31); and the hanging basket (3) can swing around the pin shaft (31).

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