A shaft support device with variable stiffness damping
A technology of supporting device and variable stiffness, applied in the functional characteristics of spring/shock absorber, rotational vibration suppression, vibration suppression adjustment, etc., can solve the problem of large structure size, flexible hinge structure consumption, inability to obtain accurate values of piezoelectric actuators, etc. problem, to achieve the effect of good vibration reduction effect
Active Publication Date: 2021-11-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
The device has a large structure size and is suitable for transmission shafts with large diameters, and transmits the driving force and displacement of the piezoelectric ceramics to the inner friction disc through a flexible hinge mechanism. The displacement is on the order of microns, which will cause part of the force and displacement output by the device during use to be easily consumed by the flexible hinge structure, and the exact value of the output force and displacement of the piezoelectric actuator cannot be obtained, so the device is actively controlled. The vibration reduction is limited, and there are certain limitations on the vibration reduction effect of the shaft system
Method used
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Embodiment Construction
[0032] The invention as Figure 1-3 As shown, in the following, whether the shaft vibration reaches the limit range can be detected by means of common displacement sensors and acceleration sensors in the prior art, and judgments can be made; at the same time, the driving circuit of the piezoelectric ceramic actuator is also Conventional technical means in the prior art, therefore, this application will not elaborate on these two aspects.
[0033] Such as figure 1 , 2 As shown, the variable stiffness damping shaft support device 1 provided in this embodiment includes a basic support 11, a flexible damping ring 12, a rolling bearing 13, a retractable friction assembly 14, a fixed friction disc 15, a baffle plate 16, and a lock nut 17 , friction bolt 18.
[0034] The basic support 11 is arranged perpendicular to the axial direction of the shaft 2, and the bottom is fixedly connected to the fixed platform 3. The center of the basic support 11 is provided with an accommodating h...
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The invention provides a shaft system support device with variable stiffness damping and relates to the field of rotor system vibration reduction. A shaft system support device with variable stiffness damping is proposed, which can effectively control the vibration of the shaft system with multiple fulcrums, and has a good damping effect on the vibration caused by sudden unbalance and transcriticality of the shaft system. The shaft system support device with variable stiffness damping includes a basic support, a flexible damping ring, a rolling bearing, a retractable friction assembly, a fixed friction plate, a baffle plate, a lock nut and a friction bolt; when the vibration in the middle of the shaft reaches a limited amplitude, The retractable friction assembly protrudes from the circular hole and contacts the fixed friction plate to increase the overall stiffness of the shaft system support device with variable stiffness damping and generate damping. The invention can effectively control the vibration of the multi-fulcrum shaft system, and has a good damping effect on the vibration caused by sudden unbalance and transcriticality of the shaft system.
Description
technical field [0001] The invention relates to the field of vibration reduction of a rotor system, in particular to the field of vibration suppression of a multi-fulcrum shaft system. Background technique [0002] With the expansion of helicopter combat missions and the improvement of helicopter performance requirements, advanced helicopters have developed into high-performance aircraft with heavy load, light weight, low vibration, low noise, new technologies, new materials, new equipment and advanced electronic equipment. In order to meet the development needs of light weight, high performance and high power-to-weight ratio, a large number of thin-walled hollow and flexible structural parts are used in the tail drive system, and the tail drive system is designed to be as light as possible without reducing reliability, resulting in shafting The vibration intensifies when the acceleration exceeds the critical state, which restricts the overall performance of the tail drive s...
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IPC IPC(8): F16F15/00F16F15/10
CPCF16F15/007F16F15/10F16F2228/066F16F2230/18
Inventor 李苗苗马亮亮朱如鹏陈蔚芳王旦
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS