Self-adaptive vibration damping base suitable for high-frequency vibration environment
阅读说明：本技术 一种适用于高频振动环境的自适应减振基座 (Self-adaptive vibration damping base suitable for high-frequency vibration environment ) 是由 张龙 程俊 刘秉斌 邱荣凯 陶瑜 马俊 于 2020-07-03 设计创作，主要内容包括：本发明提供了一种适用于高频振动环境的自适应减振基座,该方案包括有圆形的安装面板、圆形的底盘和导向柱；所述底盘尺寸和安装面板的尺寸一致；所述导向柱固定连接在底盘上；所述安装面板上对应导向柱的位置处设置有凸缘导向孔；所述底盘上固定有多个不同类型的弹簧；所述安装面板上的凸缘导向孔套在导向柱上并能够沿导向柱滑动,且安装面板与底盘的中心对齐；所述安装面板根据其上固定的设备的质量不同受到部分弹簧或全部弹簧的支撑；多个不同类型间的弹簧相互之间的刚度和高度均不相同。该方案的基座弹性刚度随承载设备的质量变化而自动变化,整体固有频率受设备质量变化的影响很小,保持远低于环境振动的水平,具有自适应减振功能。(The invention provides a self-adaptive vibration damping base suitable for a high-frequency vibration environment, which comprises a circular mounting panel, a circular chassis and a guide post, wherein the circular mounting panel is arranged on the circular chassis; the size of the chassis is consistent with that of the mounting panel; the guide post is fixedly connected to the chassis; a flange guide hole is formed in the position, corresponding to the guide post, of the mounting panel; a plurality of springs of different types are fixed on the chassis; the flange guide hole on the mounting panel is sleeved on the guide post and can slide along the guide post, and the mounting panel is aligned with the center of the chassis; the mounting panel is supported by partial springs or all springs according to the mass of equipment fixed on the mounting panel; the springs of the plurality of different types are different from each other in stiffness and height. The elastic rigidity of the base of the scheme automatically changes along with the mass change of the bearing equipment, the influence of the mass change of the equipment on the whole natural frequency is small, the level far lower than the environmental vibration is kept, and the self-adaptive vibration reduction function is realized.)
1. The utility model provides a self-adaptation damping base suitable for high-frequency vibration environment which characterized by: comprises a round mounting panel, a round chassis and a guide post; the size of the chassis is consistent with that of the mounting panel; the guide post is fixedly connected to the chassis; a flange guide hole is formed in the position, corresponding to the guide post, of the mounting panel; a plurality of springs of different types are fixed on the chassis; the flange guide hole on the mounting panel is sleeved on the guide post and can slide along the guide post, and the mounting panel is aligned with the center of the chassis; the mounting panel is supported by partial springs or all springs according to the mass of equipment fixed on the mounting panel; the springs of the plurality of different types are different from each other in stiffness and height.
2. The adaptive vibration damping mount for use in high frequency vibration environments of claim 1, wherein: a plurality of different types of springs are disposed on the chassis including:
the number one spring is 4, the rigidity is 2.0k, the height is h, the springs are distributed on four corner points of a rectangle with the length of a transverse side of 0.6R and the length of a vertical side of 1.2R, and the rectangle is aligned with the center of the chassis. Wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness;
the number of the second springs is 4, the rigidity is 1.0k, and the height is
the number of the third springs is 2, the rigidity is 1.0k, and the height isSymmetrically distributed along the left side and the right side of the center of the chassis, and the distance between the chassis and the center of the chassis is 0.6R; wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness;
the number four springs are 2 in total, the rigidity is 0.5k, and the height is
the number of the fifth spring is 4Stiffness of 0.25k and height ofFour corner points of a square with the side length of 1.2R are distributed, and the square is aligned with the center of the chassis; wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness.
3. The adaptive vibration damping mount for use in high frequency vibration environments of claim 1, wherein: the chassis circumference is provided with a plurality of rag bolt holes, and the chassis can be installed or directly arrange in work platform through the rag bolt hole on.
4. The adaptive vibration damping mount for use in high frequency vibration environments of claim 1, wherein: the mounting panel is provided with a plurality of mounting holes for fixing equipment.
5. The adaptive vibration damping mount according to claim 4, wherein: the mounting subsection of the mounting hole is set as follows:
3 multiplied by 3 mounting holes are distributed in the middle of the mounting panel in a matrix manner, and the longitudinal and transverse spacing between the holes is 0.3R;
the 4 mounting holes are distributed on four corner points of a rectangle with the length of the transverse side of 0.6R and the length of the vertical side of 1.6R, and the rectangle is aligned with the center of the mounting panel;
the 4 mounting holes are distributed on four corner points of a rectangle with the length of the transverse side being 1.6R and the length of the vertical side being 0.6R, and the rectangle is aligned with the center of the mounting panel;
wherein R is the radius of the mounting panel and chassis.
Technical Field
The invention relates to the field of vibration and noise reduction equipment, which is used in working environments affected by high-frequency vibration, such as large wind tunnel plants, offshore drilling platforms and the like, and particularly relates to a self-adaptive vibration reduction base suitable for the high-frequency vibration environment.
Background
In large wind tunnel plants, offshore drilling platforms and other operating environments, transportation equipment is often affected by environmental vibration factors. In order to reduce the adverse effect of vibration on the safe use of the equipment or the interference of vibration on the working precision of the equipment, the vibration damping base is one of the common methods. The spring vibration damping base commonly used at present can enable the integral natural frequency of the equipment-base to be far away from the environmental vibration frequency by designing the elastic stiffness of the base, so that the vibration damping effect is achieved. The elastic stiffness of a conventional vibration damping base is fixed, while the natural frequency is positively correlated with the structural stiffness and negatively correlated with the structural mass, and if the mass of the equipment changes, the natural frequency of the whole equipment-base changes, which may become close to the environmental vibration frequency, and the vibration damping function of the base fails. For example, a liquid storage tank used in a high-frequency vibration environment is arranged on a vibration reduction base with lower elastic rigidity, when the liquid storage tank is fully loaded, the natural frequency of the whole liquid storage tank-base is lower, the influence of high-frequency vibration can be reduced, but as liquid in the tank is continuously used, the mass of the liquid storage tank is continuously reduced, the whole natural frequency is gradually close to the high-frequency vibration, and the vibration reduction effect is weaker. Conventional vibration dampening bases are not adaptive to the decreasing mass of the fluid reservoir.
Chinese patent CN106122688A discloses a vibration damping base, which is composed of three bases, two V-shaped balance rods, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a weight ball, and a mounting plate, etc. the vibration damping base converts the energy generated by a power source into multiple energy, and converts the vibration energy into various forms of energy through the interaction of a plurality of connecting rods to be consumed, thereby achieving the purpose of vibration damping. The device is essentially damped and damped through structural damping, and does not have variable-rigidity self-adaptive damping characteristics.
In conclusion, the prior art generally has the defect that the elastic rigidity of the base is not adjustable, so that the vibration damping device cannot be used for vibration damping of equipment with different masses and cannot be used for self-adaptive vibration damping of equipment with real-time mass change. All parts of the device are easy to process, the precision requirement is low, the assembly is simple, and the device can be used for self-adaptive vibration reduction of equipment with real-time mass reduction in a high-frequency vibration environment by designing the number, the rigidity and the height of the spring groups. This structural form has not been reported so far.
Disclosure of Invention
The invention aims to provide a technical scheme of a self-adaptive vibration reduction base suitable for a high-frequency vibration environment aiming at the defects in the prior art, the elastic rigidity of the base of the technical scheme is automatically changed along with the mass change of bearing equipment, the whole natural frequency is slightly influenced by the mass change of the equipment, the vibration reduction level is kept far lower than the environmental vibration level, and the self-adaptive vibration reduction base has a self-adaptive vibration reduction function.
The scheme is realized by the following technical measures:
the utility model provides a self-adaptation damping base suitable for high-frequency vibration environment which characterized by: comprises a round mounting panel, a round chassis and a guide post; the size of the chassis is consistent with that of the mounting panel; the guide post is fixedly connected to the chassis; a flange guide hole is formed in the position, corresponding to the guide post, of the mounting panel; a plurality of springs of different types are fixed on the chassis; the flange guide hole on the mounting panel is sleeved on the guide post and can slide along the guide post, and the mounting panel is aligned with the center of the chassis; the mounting panel is supported by partial springs or all springs according to the mass of equipment fixed on the mounting panel; the springs of the plurality of different types are different from each other in stiffness and height.
The scheme is preferably as follows: a plurality of different types of springs are disposed on the chassis including:
the number one spring is 4, the rigidity is 2.0k, the height is h, the springs are distributed on four corner points of a rectangle with the length of a transverse side of 0.6R and the length of a vertical side of 1.2R, and the rectangle is aligned with the center of the chassis. Wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness;
the number of the second springs is 4, the rigidity is 1.0k, and the height isThe rectangular plate is distributed on four corner points of a rectangle with the length of the transverse side of 1.2R and the length of the vertical side of 0.6R, and the rectangle is aligned with the center of the chassis; wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness;
the number of the third springs is 2, the rigidity is 1.0k, and the height is
the number four springs are 2 in total, the rigidity is 0.5k, and the height isThe upper side and the lower side of the center of the chassis are symmetrically distributed, and the distance between the upper side and the lower side of the center of the chassis and the center of the chassis is 0.6R; wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness;
the number of the fifth springs is 4, the rigidity is 0.25k, and the height isFour corner points of a square with the side length of 1.2R are distributed, and the square is aligned with the center of the chassis; wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness.
The scheme is preferably as follows: the chassis circumference is provided with a plurality of rag bolt holes, and the chassis can be through the rag bolt hole installation or directly arrange work platform in.
The scheme is preferably as follows: the mounting panel is provided with a plurality of mounting holes for fixing equipment.
The scheme is preferably as follows: the installation subsection of the installation hole is set as:
3 multiplied by 3 mounting holes are distributed in the middle of the mounting panel in a matrix manner, and the longitudinal and transverse spacing between the holes is 0.3R;
the 4 mounting holes are distributed on four corner points of a rectangle with the length of the transverse side of 0.6R and the length of the vertical side of 1.6R, and the rectangle is aligned with the center of the mounting panel;
the 4 mounting holes are distributed on four corner points of a rectangle with the length of the transverse side being 1.6R and the length of the vertical side being 0.6R, and the rectangle is aligned with the center of the mounting panel;
wherein R is the radius of the mounting panel and chassis.
The beneficial effect of this scheme can be known from the statement to the above-mentioned scheme, because adopt in this scheme to be provided with the spring of a plurality of different heights different rigidity between chassis and installation panel, can realize that the installation panel bears the weight of the equipment of different according to its top, support the installation panel by the spring of different quantity and kind, play the whole elastic stiffness of damping base and bear the weight of the equipment and change automatically along with bearing the weight of the equipment, the equipment-whole natural frequency of base keeps the level far below the ambient vibration, can be used for the self-adaptation damping of the equipment that the quality reduces in real time under the high-frequency vibration environment.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the mounting panel.
FIG. 3 is a schematic view of a hole site subsection of a mounting hole in a mounting panel.
Figure 4 is a schematic view of a spring position subsection on a chassis.
Fig. 5 is a diagram of the analysis and calculation of the adaptive damping working principle.
In the figure, 1 is an installation panel, 2 is a guide post, 3 is a chassis, 4 is a first spring, 5 is a second spring, 6 is a third spring, 7 is a fourth spring, and 8 is a fifth spring. 1-1 is a flange guide hole, and 2-2 is a mounting hole.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1, the adaptive vibration damping base suitable for the high-frequency vibration environment comprises a mounting panel 1, a
As shown in fig. 2, the installation panel 1 is provided with 4 flange guide holes 1-1 along the circumference, and slides along the
As shown in fig. 3, the mounting holes 1-2 on the mounting panel 1 are distributed as follows: 3 multiplied by 3 mounting holes 1-2 are distributed in the middle of the
As shown in fig. 4, the first to fifth springs are arranged as follows:
a. the number one spring is 4, the rigidity is 2.0k, the height is h, the springs are distributed on four corner points of a rectangle with the length of a transverse side of 0.6R and the length of a vertical side of 1.2R, and the rectangle is aligned with the center of the chassis. Wherein R is the radius of the mounting panel and the chassis, m is the mounting panel mass, g is the gravity constant, and k is the spring stiffness.
b. The number of the second springs is 4, the rigidity is 1.0k, and the height is
c. The number of the third springs is 2, the rigidity is 1.0k, and the height is
d. The number four springs are 2 in total, the rigidity is 0.5k, and the height is
e. The number of the fifth springs is 4, the rigidity is 0.25k, and the height is
Fig. 5 shows an analysis and calculation chart of the adaptive damping operation principle of the present device. When the device with mass M (M is more than or equal to 0 and less than or equal to 20M) is fixed on the mounting plate, the mass of the spring is ignored, and the natural frequency of the whole device-base can be obtained according to the analytic methodWhere K is the overall elastic stiffness. According to the calculation of the rigidity and the height of the spring designed by the device, when M is more than 11M and less than or equal to 20M, all the springs play a supporting role, and K is equal to 16K; when M is more than 5M and less than or equal to 11M, the first spring is separated, only the second to fifth springs play a supporting role, and K is equal to 8K; when M is more than 2M and less than or equal to 5M, the first spring and the second spring are separated, only the third spring and the fifth spring play a supporting role, and K is equal to 4K; when M is more than 0.5M and less than or equal to 2M, the first spring to the third spring are separated, only the fourth spring to the fifth spring play a supporting role, and K is equal to 2K; when M is more than or equal to 0M and less than or equal to 0.5M, the first spring, the second spring, the third spring, the fourth spring, the fifth spring and the K are separated, and only the fifth spring plays a supporting role, and the K is equal to 1K. According toIt can be calculated that as the mass of the device is continuously reduced from 20m to 0m, the natural frequency of the device-base as a whole changes as shown in fig. 5, in whichThe natural frequency of the base when unloaded. It can be seen that when the mass of the device is continuously reduced, the relative change percentage of the natural frequency of the device-base is less than 20%, the relative change percentage is kept in a basically stable range, and the relative change percentage is far away from high-frequency vibration, so that the self-adaptive vibration reduction effect is achieved.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
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