CN211948985U - Linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support - Google Patents
Linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support Download PDFInfo
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Abstract
A linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support is characterized by comprising a vertical vibration isolation system and a horizontal vibration isolation system. The vertical vibration isolation system comprises a vertical vibration isolation mechanism, a connecting and fixing mechanism, an anti-instability mechanism, a positioning mechanism and a motion decoupling mechanism; the vertical vibration isolation mechanism is responsible for providing vertical self-adaptive rigidity characteristics required by vibration isolation; the whole device plays the role of connection and bearing through the connection fixing mechanism; the anti-instability mechanism and the positioning mechanism are arranged around the elastic element in the vertical vibration isolation mechanism and are matched with each other to ensure the stability of the performance of the vertical vibration isolation mechanism. The vibration isolation device can be used for structures, precision instruments and equipment and the like which are influenced by environmental vibration, and has the effect of isolating earthquake motion and impact while isolating the environmental vibration.
Description
Technical Field
The application belongs to the field of vibration and noise control.
Background
The vibration isolation technology belongs to a passive vibration control technology. In the last 70 years, the vibration isolation technology is continuously developed, and the vibration isolation technology has been widely researched and applied in the fields of mechanical equipment vibration control and building structure earthquake resistance. The basic principle of vibration isolation is that a vibration isolation layer with low horizontal rigidity is formed by arranging a vibration isolation support and other structures between an object to be subjected to vibration isolation and a foundation, and the influence of external environment vibration, earthquake and the like on the vibration isolation object is reduced through a filtering effect, or the vibration isolation object is prevented from generating vibration and transmitting the vibration to the ground.
The existing vibration isolation device cannot meet the requirements of various types of vibration isolation. Many precision instruments and equipment, as well as important historical cultural relics and the like, need to simultaneously consider the isolation of seismic action and the vibration of the surrounding environment, and the characteristics of earthquake, mechanical vibration and the like are quite different. The earthquake has the characteristics of high amplitude, wide frequency spectrum and low frequency; and the mechanical vibration has the characteristics of low amplitude, narrow frequency spectrum and high frequency. The traditional vibration isolation device is difficult to meet the requirement of optimizing the isolation of two types of vibration sources. In addition, some existing devices with three-way vibration isolation function have the defects of serious vertical and horizontal mechanical property coupling, poor vibration isolation effect and the like.
Chinese patent application 2019107633608 discloses a bearing type motion decoupling three-dimensional vibration isolation support which has good vibration isolation effect on various vibration sources and horizontal and vertical multi-dimensional vibration input. The technical scheme is as follows: a bearing type motion decoupling three-dimensional vibration isolation support comprises an upper connecting plate, a middle working plate, a lower connecting plate, a horizontal vibration isolation system, a vertical vibration isolation system, a linear bearing and a bearing guide rod. The horizontal vibration isolation system is arranged between the upper connecting plate and the middle connecting plate, and the vertical vibration isolation system is arranged between the middle connecting plate and the lower connecting plate; the horizontal vibration isolation system adopts a laminated rubber support and plays a vibration isolation role through horizontal deformation; the vertical vibration isolation system adopts a device with self-adaption rigidity, which is composed of a disc spring, a spiral spring and a positioning loading ring, and plays a role in vibration isolation through vertical deformation; the linear bearing and the bearing guide rod are arranged between the middle working plate and the lower connecting plate to realize the horizontal and vertical motion decoupling of the bearing type motion decoupling three-dimensional vibration isolation support. The vertical vibration isolation system is a device with self-adaptive rigidity, and comprises a disc spring, a spiral spring and a positioning loading ring; the positioning loading ring comprises a bottom positioning loading ring, an inner positioning loading ring and an outer positioning loading ring; the outer positioning loading ring and the bottom positioning loading ring are sequentially arranged between the middle working plate and the lower connecting plate from top to bottom; two or more disc springs are sequentially arranged between the outer positioning loading ring and the bottom positioning loading ring from top to bottom, and two adjacent disc springs are connected in series through one inner positioning loading ring respectively and transmit force through the inner positioning loading ring; the spiral spring is positioned between the middle working plate and the lower connecting plate, and sequentially passes through the outer positioning loading ring, the disc spring connected in series through the inner positioning loading ring and the bottom positioning loading ring. The disc springs connected in series provide negative stiffness, the spiral springs provide positive stiffness, and the stiffness of the device is close to zero near the flattening position of the disc springs, so that a lower initial vibration isolation frequency is obtained.
Disclosure of Invention
The utility model provides an aim at overcome prior art not enough, further research and development discloses a vertical vibration isolation device of novel bearing formula motion decoupling zero, synthesizes unstability, the eccentric problem that has comprehensively solved vertical vibration isolation system and appears, the method thinking that gives for this application: by means of combined typesAnti-instability mechanismThe stability of the spiral spring is ensured while the vertical deformation capacity is not influenced; by co-operation with anti-destabilizing meansAnti-deformation positioning loading ringDesigning to ensure the centering of the centroid of the disc spring assembly; by passingBearing assembly Design of sleeveThe device has the advantages that the space is saved, the installation is simplified, and meanwhile, the whole device can only vertically generate low-friction motion, so that the effects of motion decoupling and shock insulation/vibration effect guarantee are achieved.
Technical scheme
A linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support is characterized in that a bearing type motion decoupling vertical vibration isolation device and a horizontal vibration isolation support are combined to form the three-dimensional vibration isolation support, and the vertical and horizontal vibration isolation/vibration isolation capability is exerted under the condition of three-dimensional seismic motion input;
the bearing type motion decoupling vertical vibration isolation device comprises a vertical vibration isolation mechanism, a connecting and fixing mechanism, an anti-instability mechanism, a positioning mechanism and a motion decoupling mechanism; the vertical vibration isolation mechanism is a core mechanism which is positioned at the central position of the whole device and is responsible for providing vertical self-adaptive rigidity characteristics required by vibration isolation; the whole device plays the role of connection and bearing through the connecting and fixing mechanism, the top and the bottom of the connecting and fixing mechanism are respectively fixed on the structure, and the top and the bottom of the connecting and fixing mechanism and the vertical vibration isolation mechanism positioned in the middle realize the transmission and bearing of vertical force; the anti-instability mechanism and the positioning mechanism are arranged around the elastic element in the vertical vibration isolation mechanism and are matched with each other to ensure the stability of the performance of the vertical vibration isolation mechanism; the waist of the whole device is provided with a motion decoupling mechanism which is matched with the connecting and fixing mechanism to realize the decoupling of vertical motion and horizontal motion.
The horizontal vibration isolation system comprises two horizontal vibration isolation devices combined in a cross shape, the two horizontal vibration isolation devices are arranged in an upper layer and a lower layer and fixedly connected with each other, each horizontal vibration isolation device on each layer comprises a plurality of units, each unit is arranged in parallel, each unit comprises a linear guide rail system and a resetting energy consumption device, the linear guide rail system is responsible for providing relative displacement capacity and pulling resistance capacity required by horizontal vibration isolation, and the resetting energy consumption devices are parallel to the linear guide rail system and play roles in improving system damping and reducing displacement response.
The vertical vibration isolation mechanism is a vertical vibration isolation device with rigidity self-adaptive characteristics and comprises a disc spring 9 and a spiral spring 8; a plurality of disc springs 9 are connected in series to form a disc spring group, and a spiral spring 8 is arranged at the central axis of the disc spring group and is in parallel connection with the disc spring group; when the disc spring group is near the flattening position, nonlinear negative stiffness can be provided and is connected with the spiral spring 8 with linear positive stiffness in parallel, and nonlinear self-adaptive stiffness is generated.
The connecting and fixing mechanism sequentially comprises an upper connecting plate 12, an inner sleeve 4, a lower connecting plate 1, an outer sleeve 3 and a bottom plate 13 from top to bottom, wherein the upper connecting plate 12 is connected with a structure of a to-be-isolated body through bolts, the inner sleeve 4 is fixed on the upper connecting plate 12 through bolts, the outer sleeve 3 is fixed on the bottom plate 13 through bolts, and the bottom plate 13 is connected with a foundation through bolts; the outer diameter of the inner sleeve 4 is smaller than the inner diameter of the outer sleeve 3. The gravity of the vibration-isolated body is transmitted to the vertical vibration isolation mechanism through the upper connecting plate 12 and the inner sleeve 4, and then transmitted to the foundation through the bottom plate 13.
The anti-instability mechanism comprises an anti-instability upper rod 10 and an anti-instability lower rod 11, wherein the anti-instability upper rod 10 is fixed on the inner sleeve 4 through threads, and the anti-instability lower rod 11 is fixed on the outer sleeve 3 through threads; the top of the upper instability preventing rod 10 and the bottom of the lower instability preventing rod 11 are respectively a full circle with the same radius, and the rod walls of the upper instability preventing rod and the lower instability preventing rod are in a complementary relation, namely the upper instability preventing rod and the lower instability preventing rod can form a full circle after being spliced and inserted, and form a hollow rod-shaped vertical telescopic mechanism. The upper and lower rod spaces of the instability-proof mechanism are internally used for arranging the spiral spring 8 in the vertical vibration isolation mechanism, so that the lateral instability of the instability-proof mechanism under the pressure working state is avoided.
The positioning mechanism comprises a bottom positioning loading ring 5, an inner positioning loading ring 6 and an outer positioning loading ring 7, wherein the bottom positioning loading ring 5 is arranged at the bottom of the outer sleeve 3, the inner positioning loading ring 6 is positioned between two disc springs 9 with adjacent inner diameters, and the outer positioning loading ring 7 is used between two disc springs 9 with adjacent outer diameters. The inner diameter of each positioning loading ring is the same as the outer diameter of the anti-destabilization mechanism, namely the hollow rod, and the two mechanisms are matched with each other to realize the accurate centering of the positioning loading rings, correct the position of the disc spring 9 in the vertical vibration isolation mechanism, and play the roles of positioning the disc spring and providing a deformation space.
The motion decoupling mechanism comprises a linear bearing 2 and a ball 14, wherein the linear bearing 2 is fixed on the lower connecting plate 1 through a bolt; when the device is subjected to vertical relative displacement, the inner sleeve 4 moves in the linear bearing 2, rolling friction is generated between the balls 14 in the bearing and the inner sleeve 4, the inner sleeve 4 is guaranteed to do low-friction linear motion in the bearing, and horizontal and vertical motion decoupling is realized.
In the horizontal vibration isolation system, the structure of each unit is as follows: the damping device comprises a linear guide rail system, a resetting energy consumption device and an upper working plate 19 (or a middle working plate 15), wherein the linear guide rail system and the resetting energy consumption device are fixedly installed on the upper working plate 19 (or the middle working plate 15), and then the upper working plate 19 (or the middle working plate 15) is fixedly installed on a damped object (a vertical damping system).
The linear guide system includes linear guide 16, two sliders 17 with the interlock of linear guide 16, the power consumption device that resets includes two sets, sets up respectively in linear guide 16's both sides, and every set of power consumption device that resets includes reset coil spring 20, viscidity attenuator 18 and dog 21, dog 21 is located the outermost end and is fixed in and makes board 19 (or well board 15), viscidity attenuator 18 inserts in reset coil spring 20 circles, and just the one end of viscidity attenuator 18 is connected in the dog 21 of outermost end, and its other end is connected in inboard slider 17.
The utility model discloses the obvious effect that the vertical vibration isolation device of bearing formula motion decoupling zero can realize is promoted and is:
(1) the combined design based on the anti-instability mechanism avoids the lateral instability phenomenon of the vertical vibration isolation mechanism under the state that the spiral spring is pressed, and ensures the stability of the vertical vibration isolation mechanism. Based on the matching design of the anti-instability mechanism and the positioning mechanism, the accurate installation of the positioning loading ring is realized, the centering precision of the disc spring is optimized, and the working performance of a vertical vibration isolation system is ensured;
(2) based on the matching design of the motion decoupling mechanism and the connecting and fixing mechanism, the decoupling of the vertical motion and the horizontal motion of the system is smoothly realized, and the installation condition is simplified;
(3) the linear guide rail type design based on the horizontal vibration isolation system improves the pulling resistance of the support, optimizes the working conditions of the reset energy consumption device and simplifies the design of the reset energy consumption device.
Drawings
FIG. 1 is a cross-sectional view of the apparatus of the present application;
FIG. 2 is a perspective assembly view of the present application;
FIG. 3 is a cross-sectional view of the decoupling assembly;
FIG. 4 is a schematic view of the anti-destabilizing rod fit;
FIG. 5 is a schematic diagram of the series 2 groups of disk spring loaded packs;
FIG. 6 is a schematic view of a linear guide rail mating configuration;
FIG. 7 is a schematic view of the structure of the position limiting device;
reference numbers in the figures: the device comprises a lower connecting plate 1, a linear bearing 2, an outer sleeve 3, an inner sleeve 4, a bottom positioning loading ring 5, an inner positioning loading ring 6, an outer positioning loading ring 7, a spiral spring 8, a disk spring 9, an upper instability preventing rod 10, a lower instability preventing rod 11, an upper connecting plate 12, a bottom plate 13, a ball 14, a middle working plate 15, a linear guide rail 16, a sliding block 17, a viscous damper 18, an upper working plate 19, a reset spiral spring 20 and a stop dog 21.
Detailed Description
The present application will be further described with reference to the following examples shown in the drawings.
The bearing type motion decoupling vertical vibration isolation device provided by the invention is combined with the horizontal vibration isolation support to form the three-dimensional vibration isolation support, and the vertical and horizontal vibration isolation/vibration isolation capability is exerted under the condition of three-dimensional vibration isolation input.
Hereinafter, only as an implementation example, the vertical vibration isolation device is combined with the horizontal vibration isolation support, the up-down position is not limited uniquely, and the number of combinations is also unlimited and depends on actual project and scene requirements.
As an example, as shown in fig. 1.
A first part: vertical vibration isolation system
For a vertical vibration isolation mounting of bearing formula motion decoupling zero, include: vertical vibration isolation mechanism, connection fixed establishment, anti-destabilization mechanism, positioning mechanism, motion decoupling mechanism. The vertical vibration isolation mechanism is a core mechanism which is positioned at the central position of the whole device and is responsible for providing vertical self-adaptive rigidity characteristics required by vibration isolation; the whole device plays the role of connection and bearing through the connecting and fixing mechanism, the top and the bottom of the connecting and fixing mechanism are respectively fixed on the structure, and the top and the bottom of the connecting and fixing mechanism and the vertical vibration isolation mechanism positioned in the middle realize the transmission and bearing of vertical force; the anti-instability mechanism and the positioning mechanism are arranged around the elastic element in the vertical vibration isolation mechanism and are matched with each other to ensure the stability of the performance of the vertical vibration isolation mechanism; the waist of the whole device is provided with a motion decoupling mechanism which is matched with the connecting and fixing mechanism to realize the decoupling of vertical motion and horizontal motion.
The vertical vibration isolation mechanism comprises a vertical vibration isolation device with rigidity self-adaptive characteristic, which is composed of a disc spring 9 and a spiral spring 8. A plurality of disc springs 9 are connected in series to form a disc spring group, and a spiral spring 8 is arranged at the central axis of the disc spring group and is in parallel connection with the disc spring group; when the disc spring group is near the flattening position, nonlinear negative stiffness can be provided and is connected with the spiral spring 8 with linear positive stiffness in parallel, and nonlinear self-adaptive stiffness is generated. The rigidity self-adaptation means that when the vertical vibration displacement of the support is small, the system provides small rigidity, and the vibration isolation initial frequency is reduced; when the vibration displacement is large, the rigidity is high, and the system failure caused by overlarge displacement is avoided.
The connecting and fixing mechanism sequentially comprises an upper connecting plate 12, an inner sleeve 4, a lower connecting plate 1, an outer sleeve 3 and a bottom plate 13 from top to bottom, wherein the upper connecting plate 12 is connected with a structure of a to-be-isolated body through bolts, the inner sleeve 4 is fixed on the upper connecting plate 12 through bolts, the outer sleeve 3 is fixed on the bottom plate 13 through bolts, and the bottom plate 13 is connected with a foundation through bolts; the outer diameter of the inner sleeve 4 is smaller than the inner diameter of the outer sleeve 3. The gravity of the vibration-isolated body is transmitted to the vertical vibration isolation mechanism through the upper connecting plate 12 and the inner sleeve 4, and then transmitted to the foundation through the bottom plate 13. The anti-instability mechanism comprises an anti-instability upper rod 10 and an anti-instability lower rod 11, wherein the anti-instability upper rod 10 is fixed on the inner sleeve 4 through threads, and the anti-instability lower rod 11 is fixed on the outer sleeve 3 through threads; the top of the upper instability preventing rod 10 and the bottom of the lower instability preventing rod 11 are respectively a full circle with the same radius, and the rod walls of the upper instability preventing rod and the lower instability preventing rod are in a complementary relation, namely the upper instability preventing rod and the lower instability preventing rod can form a full circle after being spliced and inserted, and form a hollow rod-shaped vertical telescopic mechanism. The upper and lower rod spaces of the instability-preventing mechanism are used for accommodating the spiral spring 8 in the vertical vibration isolation mechanism, so that the lateral instability of the instability-preventing mechanism under a pressed working state is avoided, and the lateral stability of the linear positive-stiffness spiral spring 8 vibration isolation component in the vertical vibration isolation mechanism is guaranteed.
The positioning mechanism comprises a bottom positioning loading ring 5, an inner positioning loading ring 6 and an outer positioning loading ring 7, wherein the bottom positioning loading ring 5 is arranged at the bottom of the outer sleeve 3, the inner positioning loading ring 6 is positioned between two disc springs 9 with adjacent inner diameters, and the outer positioning loading ring 7 is used between two disc springs 9 with adjacent outer diameters. The inner diameter of each positioning loading ring is the same as the outer diameter of the anti-destabilization mechanism, namely the hollow rod, and the two mechanisms are matched with each other to realize the accurate centering of the positioning loading rings, further correct the position of the disc spring 9 in the vertical vibration isolation mechanism and play roles in positioning the disc spring and providing a deformation space.
The motion decoupling mechanism comprises a linear bearing 2 and a ball 14, wherein the linear bearing 2 is fixed on the lower connecting plate 1 through a bolt. When the device is subjected to vertical relative displacement, the inner sleeve 4 moves in the linear bearing 2, rolling friction is generated between the balls 14 in the bearing and the inner sleeve 4, the inner sleeve 4 is guaranteed to do low-friction linear motion in the bearing, and horizontal and vertical motion decoupling is realized. Fig. 3 is a cross-sectional view of the decoupling assembly. The horizontal motion and the vertical motion are decoupled, so that on one hand, the working condition of the vertical vibration isolation system is optimized, and the design process is simplified; on the other hand, the phenomenon that the vibration-isolated body is swung and overturned due to the fact that the vibration isolation layer has an overlarge rotating angle under the vibration excitation condition is effectively avoided.
Fig. 2 is a perspective assembly view of the present application illustrating the mating relationship between the components.
Fig. 4 is a schematic view of the anti-destabilizing rod. The combined instability-proof rod is adopted to prevent the instability of the spiral spring. When the device works, the two rod limbs are staggered, so that a vertical deformation space can be ensured; meanwhile, the outer diameter and the inner diameter of the inner positioning loading ring and the outer positioning loading ring are different, the deformation resistance is ensured to be strong, and meanwhile, the inner positioning loading ring and the outer positioning loading ring can be matched with the anti-instability rod to position the inner positioning loading ring and the disc spring during installation so as to ensure uniform stress.
The belleville springs 8 of fig. 5 are connected in series by cooperating with the inner and outer positioning and loading rings to enhance the deformability of the vertical vibration isolation system. The inner positioning loading ring 5 and the outer positioning loading ring 6 have the same inner diameter, are convenient to calibrate by matching with an instability-preventing rod during installation, and play roles in transferring force, fixing the disc spring 8 and providing larger deformation capacity for the disc spring 8.
A second part: horizontal vibration isolation system
Is a horizontal vibration isolation support. The horizontal vibration isolation support adopts a linear guide rail type design in the horizontal direction, can decompose horizontal motion into vertical bidirectional motion in a horizontal plane through two pairs of linear guide rails combined in a cross manner, and plays a vibration isolation role by matching with a resetting and energy consumption device. The linear guide rail is a linear motion system, has better vertical pressure-bearing and tensile capacity, and can avoid the overturning phenomenon of the vibration isolator. The horizontal vibration isolation system comprises two horizontal vibration isolation devices combined in a cross shape, the two horizontal vibration isolation devices are arranged in an upper layer and a lower layer and fixedly connected with each other, the horizontal vibration isolation device on each layer comprises a plurality of units, in the embodiment, two units are taken as an example, each unit is arranged in parallel, each unit comprises a linear guide rail system and a reset energy consumption device, and the linear guide rail system is responsible for providing the relative displacement capacity and the pulling resistance capacity required by the horizontal vibration isolation; the reset energy dissipation device is arranged in parallel to the linear guide rail system, and plays roles in improving system damping and reducing displacement response.
By way of example, and not limitation, the present embodiment gives the structure of each unit: the damping device comprises a linear guide rail system, a resetting energy consumption device and an upper working plate 19 (or a middle working plate 15), wherein the linear guide rail system and the resetting energy consumption device are fixedly installed on the upper working plate 19 (or the middle working plate 15), and then the upper working plate 19 (or the middle working plate 15) is fixedly installed on a damped object (a vertical damping system).
The linear guide rail system comprises a linear guide rail 16 and two sliding blocks 17 meshed with the linear guide rail 16, the reset energy dissipation devices comprise two sets which are respectively arranged at two sides of the linear guide rail 16, each set of reset energy dissipation device comprises a reset spiral spring 20, a viscous damper 18 and a stop dog 21, the stop dog 21 is positioned at the outermost end and is fixed on an upper working plate 19 (or a middle working plate 15), the viscous damper 18 is inserted into 20 circles of the reset spiral spring, one end of the viscous damper 18 is connected to the stop dog 21 at the outermost end, and the other end of the viscous damper is connected to the sliding block 17 at the inner side; the distance between the two sliders 17 on the linear guide 16 is set sufficiently large to avoid collision. In this way, the restoring force of the return coil spring 20 and the damping characteristic of the viscous damper 18 realize low rigidity required for horizontal vibration isolation, and control the overall displacement response of the system.
The linear guide 16 and the slider 17 are fixed to the upper working plate 19 (or the middle working plate 15), and may be fastened by bolts, welding, or the like. The middle working plate 15 is connected with an upper connecting plate of the vertical vibration isolation system through a bolt. Are conventional and are not intended as a limiting technical measure.
Claims (8)
1. A linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support is characterized in that a bearing type motion decoupling vertical vibration isolation device and a horizontal vibration isolation support are combined to form the three-dimensional vibration isolation support, and the vertical and horizontal vibration isolation/vibration isolation capability is exerted under the condition of three-dimensional seismic motion input;
the bearing type motion decoupling vertical vibration isolation device comprises a vertical vibration isolation mechanism, a connecting and fixing mechanism, an anti-instability mechanism, a positioning mechanism and a motion decoupling mechanism; the vertical vibration isolation mechanism is a core mechanism which is positioned at the central position of the whole device and is responsible for providing vertical self-adaptive rigidity characteristics required by vibration isolation; the whole device plays the role of connection and bearing through the connecting and fixing mechanism, the top and the bottom of the connecting and fixing mechanism are respectively fixed on the structure, and the top and the bottom of the connecting and fixing mechanism and the vertical vibration isolation mechanism positioned in the middle realize the transmission and bearing of vertical force; the anti-instability mechanism and the positioning mechanism are arranged around the elastic element in the vertical vibration isolation mechanism and are matched with each other to ensure the stability of the performance of the vertical vibration isolation mechanism; the waist part of the whole device is provided with a motion decoupling mechanism which is matched with the connecting and fixing mechanism to realize the decoupling of vertical motion and horizontal motion;
the horizontal vibration isolation support comprises two horizontal vibration isolation devices combined in a cross shape, the two horizontal vibration isolation devices are arranged in an upper layer and a lower layer and fixedly connected with each other, each horizontal vibration isolation device on each layer comprises a plurality of units, each unit is arranged in parallel, each unit comprises a linear guide rail system and a resetting energy consumption device, the linear guide rail system is responsible for providing relative displacement capacity and anti-pulling capacity required by horizontal vibration isolation, and the resetting energy consumption devices are parallel to the linear guide rail system and play roles in improving system damping and reducing displacement response.
2. The linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support is characterized in that the vertical vibration isolation mechanism is a vertical vibration isolation device with stiffness self-adaptive characteristics and comprises a disc spring (9) and a spiral spring (8); a plurality of disc springs (9) are connected in series to form a disc spring group, and a spiral spring (8) is arranged at the central axis of the disc spring group and is in parallel connection with the disc spring group; when the disc spring group is near the flattening position, nonlinear negative stiffness can be provided and is connected with the spiral spring (8) with linear positive stiffness in parallel, and nonlinear adaptive stiffness is generated.
3. The linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support is characterized in that the connecting and fixing mechanism sequentially comprises an upper connecting plate (12), an inner sleeve (4), a lower connecting plate (1), an outer sleeve (3) and a bottom plate (13) from top to bottom, the upper connecting plate (12) is connected with a structure of a vibration-isolated body through bolts, the inner sleeve (4) is fixed on the upper connecting plate (12) through bolts, the outer sleeve (3) is fixed on the bottom plate (13) through bolts, and the bottom plate (13) is connected with a foundation through bolts; the outer diameter of the inner sleeve (4) is smaller than the inner diameter of the outer sleeve (3), and the gravity of the vibration-isolated body is transmitted to the vertical vibration-isolating mechanism through the upper connecting plate (12) and the inner sleeve (4) and then transmitted to the foundation through the bottom plate (13).
4. The linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support is characterized in that the anti-instability mechanism comprises an anti-instability upper rod (10) and an anti-instability lower rod (11), the anti-instability upper rod (10) is fixed to the inner sleeve (4) through threads, and the anti-instability lower rod (11) is fixed to the outer sleeve (3) through threads; the top of the upper instability preventing rod (10) and the bottom of the lower instability preventing rod (11) are respectively a full circle with the same radius, the rod walls of the upper instability preventing rod and the lower instability preventing rod are in a complementary relation, namely the upper instability preventing rod and the lower instability preventing rod can form a full circle after being spliced and inserted and form a hollow rod-shaped vertical telescopic mechanism, and a spiral spring (8) in the vertical vibration isolation mechanism is arranged in the space of the upper instability preventing rod and the lower instability preventing rod to prevent the lateral instability of the upper instability preventing rod and the lower instability preventing rod from occurring under a compressed working state.
5. The linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support is characterized in that the positioning mechanism comprises a bottom positioning loading ring (5), an inner positioning loading ring (6) and an outer positioning loading ring (7), the bottom positioning loading ring (5) is arranged at the bottom of the outer sleeve (3), the inner positioning loading ring (6) is arranged between two disc springs (9) with adjacent inner diameters, the outer positioning loading ring (7) is used between two disc springs (9) with adjacent outer diameters, the inner diameter of each positioning loading ring is the same as the outer diameter of a hollow rod-shaped anti-destabilization mechanism, and the two mechanisms are matched with each other to realize accurate centering of the positioning loading rings, correct the position of the disc spring (9) in the vertical vibration isolation mechanism and play roles in positioning the disc springs and providing deformation spaces.
6. The linear guide rail-bearing type motion decoupling three-dimensional vibration isolating support is characterized in that the motion decoupling mechanism comprises a linear bearing (2) and a ball (14), wherein the linear bearing (2) is fixed on the lower connecting plate (1) through a bolt; when the device is vertically displaced relatively, the inner sleeve (4) moves in the linear bearing (2), rolling friction is formed between the balls (14) in the bearing and the inner sleeve (4), the inner sleeve (4) is guaranteed to do low-friction linear motion in the bearing, and horizontal and vertical motion decoupling is achieved.
7. The linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support as claimed in claim 1, wherein in the horizontal vibration isolation system,
the structure of each unit is as follows: the damping device comprises a linear guide rail system, a resetting energy consumption device, an upper working plate (19) or a middle working plate (15), wherein the linear guide rail system and the resetting energy consumption device are fixedly installed on the upper working plate (19) or the middle working plate (15), and then the upper working plate (19) or the middle working plate (15) is fixedly installed on a vertical damping system.
8. The linear guide rail-bearing type motion decoupling three-dimensional vibration isolation support as claimed in claim 7, wherein the linear guide rail system comprises a linear guide rail (16) and two sliding blocks (17) engaged with the linear guide rail (16), the reset energy dissipation devices comprise two sets which are respectively arranged at two sides of the linear guide rail (16), each set of reset energy dissipation device comprises a reset coil spring (20), a viscous damper (18) and a stop block (21), the stop block (21) is located at the outermost end and fixed on the upper working plate (19) or the middle working plate (15), the viscous damper (18) is inserted into the circle of the reset coil spring (20), one end of the viscous damper (18) is connected to the stop block (21) at the outermost end, and the other end of the viscous damper is connected to the sliding block (17) at the inner side.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115440398A (en) * | 2022-09-13 | 2022-12-06 | 中国核动力研究设计院 | Guide rail type horizontal and vertical bidirectional excitation decoupling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115440398A (en) * | 2022-09-13 | 2022-12-06 | 中国核动力研究设计院 | Guide rail type horizontal and vertical bidirectional excitation decoupling device |
| CN115440398B (en) * | 2022-09-13 | 2024-05-07 | 中国核动力研究设计院 | Guide rail type horizontal and vertical bidirectional excitation decoupling device |
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