CN108868278B - Viscous fluid damper with self-detection performance - Google Patents
Viscous fluid damper with self-detection performance Download PDFInfo
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- CN108868278B CN108868278B CN201810946397.1A CN201810946397A CN108868278B CN 108868278 B CN108868278 B CN 108868278B CN 201810946397 A CN201810946397 A CN 201810946397A CN 108868278 B CN108868278 B CN 108868278B
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- viscous fluid
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping
-
- 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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- Business, Economics & Management (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Physics & Mathematics (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a viscous fluid damper capable of self-detecting performance, which comprises a guide rod and a cylinder body, wherein the right end of the guide rod is fixedly connected with a second connecting lug through a force sensor, a transmission rod, a stepping motor and a second connecting rod in sequence, a performance self-detecting system is integrated in the stepping motor, a through hole communicated with a baffle hole is formed in the side wall of the cylinder body, a sliding baffle is arranged in the through hole and the baffle hole, a flanged connecting piece capable of being adsorbed by a magnet is arranged at the outer end of the baffle, a reset spring is arranged between the flanged connecting piece and the cylinder body, an electromagnet which adsorbs the flanged connecting piece and pulls the baffle to move outwards after being electrified is fixed on a protective cover, and a displacement sensor is arranged between the protective cover and a cover plate. According to the invention, the stepping motor drives the guide rod and the cylinder body to perform relative movement, the self-detection system of the performance is utilized to automatically detect the energy consumption performance of the viscous fluid damper, so that the viscous fluid damper can effectively reduce the vibration of a building structure when an earthquake occurs, and the safety of the building structure is ensured.
Description
Technical Field
The invention belongs to a vibration control device of a civil engineering structure, and particularly relates to a viscous fluid damper with self-detection performance.
Background
Earthquake is one of the most damaging sudden natural disasters faced by humans, and is also a disaster event with high frequency in recent years. The China is located between the Pacific ocean and the European seismic zone, is one of the most frequent countries in the world, and more than half of the territorial areas are severely threatened by earthquakes. The results of past seismic surveys show that building damage and collapse are the main causes of casualties and economic losses. With the acceleration of the urban process, urban buildings and population are becoming denser and denser, and seismic damage is likely to be more serious. Therefore, how to reduce the vibration of the building, especially the high-rise and super high-rise building under the action of earthquake, further reduce the damage and collapse of the structure, achieve the purpose of reducing casualties and economic losses, and is a great problem facing the civil construction engineering field.
The energy-consumption damping technology is that energy-consumption damping devices are arranged at certain parts of a building structure, the energy of an earthquake input structure is absorbed and consumed by the energy-consumption damping devices, and the vibration of the building structure is reduced, so that the damage and collapse of the building structure are further reduced, and the energy-consumption damping technology becomes a main measure for damping control of the engineering structure. The viscous fluid damper is an energy-dissipating and shock-absorbing device which uses the relative motion between an internal piston and a cylinder body to force viscous fluid in the cylinder body to flow through an orifice to generate damping force so as to further dissipate seismic energy.
The lifetime of building structures is as long as decades or even hundreds of years, and thus long-term reliability of viscous fluid dampers mounted to building structures is also required. However, in the long-term use process of the viscous fluid damper, durability problems such as seal ring failure, viscous fluid segregation, viscous fluid leakage, piston movement blockage and the like may occur, so that the energy consumption and shock absorption performance of the viscous fluid damper is reduced or even lost, and temporary safety of a building structure in an earthquake cannot be ensured. Therefore, timely and accurate grasping of the performance of the viscous fluid damper is important to ensure the safety of the building structure under the earthquake action. Viscous fluid dampers are not only numerous but also are positionally dispersed for installation in building structures. The existing nondestructive detection means cannot effectively detect the performance of the viscous fluid damper, the disassembly experiment detection has the defects of time and labor waste, high price and the like, the viscous fluid damper is often installed in a wall body or in a place where detection personnel are difficult to reach, and the nondestructive detection and the disassembly experiment detection are difficult to implement in actual engineering.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention aims to provide the viscous fluid damper capable of automatically detecting the energy consumption and damping performance at regular intervals and capable of automatically detecting the performance of the viscous fluid damper, so that management staff can conveniently and timely replace the abnormal viscous fluid damper, and the safety of a building structure in the occurrence of an earthquake is ensured.
The technical scheme is as follows: the invention discloses a viscous fluid damper capable of self-detecting performance, which comprises a guide rod and a cylinder body, wherein the left end of the cylinder body is fixedly connected with a first connecting lug through a connecting rod, the guide rod sequentially penetrates through a first piston, a partition plate, a second piston and a cover plate from left to right, the right end of the guide rod is fixedly connected with a force sensor, a transmission rod, a stepping motor and the second connecting lug in sequence, a temperature sensor and a performance self-detecting system are integrated inside the stepping motor, the stepping motor is fixedly connected with a protective cover, the partition plate is fixedly connected with the cylinder body, an orifice perpendicular to the plane of the partition plate and a baffle hole parallel to the plane of the partition plate are arranged on the partition plate, a through hole perpendicular to the surface of the cylinder body and communicated with the baffle hole is formed in the side wall of the cylinder body, a baffle capable of sliding is arranged in the through hole and the baffle hole, a flanged connecting piece capable of being adsorbed by a magnet is arranged at the outer end of the baffle, an electromagnet is fixedly arranged between the flanged connecting piece and the cylinder body, an electromagnet which is adsorbed by the flange connecting piece after being electrified is fixedly arranged on the protective cover, a displacement sensor is arranged between the protective cover, and the baffle is connected with the performance self-detecting system.
The performance self-detection system comprises a clock, a power controller, a microprocessor, a stepping motor controller, a displacement sensor signal demodulation circuit, a force sensor signal demodulation circuit and a temperature sensor signal demodulation circuit, wherein the clock is respectively connected with the uninterrupted power supply and the power controller, and the microprocessor is respectively connected with the power controller, the stepping motor controller, the displacement sensor signal demodulation circuit, the force sensor signal demodulation circuit, the temperature sensor signal demodulation circuit, a data memory and a wireless transmitter. The electromagnet is electrified to adsorb the flanged connecting piece and drive the baffle to move outwards, the microprocessor reads a preset instruction in the data memory and transmits the preset instruction to the stepping motor controller, the stepping motor controller drives the stepping motor to rotate according to the instruction, and then the transmission rod and the force sensor push the guide rod to move, and the displacement sensor signal demodulation circuit, the force sensor signal demodulation circuit and the temperature sensor signal demodulation circuit respectively demodulate signals of the displacement sensor, the force sensor and the temperature sensor and transmit the signals to the microprocessor. The microprocessor reads a judging program in the data memory, compares the theoretical damping force with the actually measured guide rod thrust, judges whether the viscous fluid damper is normal or not, transmits a judging result to the wireless transmitter, and the wireless transmitter informs a manager of the viscous fluid damper of the judging result in a short message or mail mode.
The guide rod and the first piston and the second piston which are fixedly connected with the guide rod can longitudinally slide along the cylinder body. The protective cover is cylindrical. The stepping motor is provided with a locking device, so that the stepping motor can not rotate when the viscous fluid damper is in a working state. The protective cover, the return spring, the cylinder body and the partition plate are all made of materials which cannot be adsorbed by the magnet. The number of the orifices, the baffle plates, the flanged connecting pieces, the baffle plate holes, the through holes, the reset springs and the electromagnets are the same. The cylinder body end plate is provided with a first vent hole, and the cover plate is provided with a second vent hole.
Working principle: the viscous fluid damper is in a working state by default, the area of the throttling hole is smaller, the damping force is large when the cylinder body and the guide rod relatively move, and the energy consumption and shock absorption performance are good. When the time reaches zero minute and zero seconds on one month, the viscous fluid damper is converted into a detection state, the electromagnet is electrified to adsorb the flanged connecting piece and pull the baffle to move outwards, so that the area of the orifice is greatly increased, the external force required for pushing the guide rod is greatly reduced, and the stepping motor can easily push the guide rod to move; the stepping motor pushes the guide rod to slide in the cylinder body through the transmission rod and the force sensor; and judging whether the performance of the viscous fluid damper is abnormal or not by comparing the actual measurement thrust of the force sensor in the motion process of the guide rod with the theoretical damping force calculated by the microprocessor, and wirelessly transmitting the detection result to a manager. After detection is completed, the electromagnet is powered off and the magnetism disappears, the return spring pulls the baffle to return to the original position, and the viscous fluid damper returns to the working state.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable characteristics: according to the invention, through the relative movement of the guide rod and the cylinder body, the piston pushes viscous fluid to flow through the damping force generated by the orifice of the partition plate to consume earthquake energy, so that the vibration of the building structure under the action of an earthquake is reduced greatly, and the safety of the building structure is ensured when the earthquake occurs; the performance self-detection system integrated in the viscous fluid damper regularly utilizes the stepping motor to push the guide rod to move to generate damping force, judges whether the viscous fluid damper is abnormal or not by comparing the actually measured guide rod thrust of the force sensor with the theoretical damping force calculated by the microprocessor, has an automatic detection function of the performance of the viscous fluid damper, and is beneficial to ensuring the long-term effectiveness of the viscous fluid damper mounted in a building structure; the invention can automatically send the detection result to the manager of the viscous fluid damper without the field operation of the detector, has the advantages of low cost, easy realization, no destructiveness and the like, and can be widely applied to vibration control of various building structures.
Drawings
FIG. 1 is a schematic diagram of a viscous fluid damper of the present invention with self-testing of performance;
FIG. 2 is a schematic longitudinal section of the cylinder of the present invention;
FIG. 3 is a schematic longitudinal cross-sectional view of a separator of the present invention;
FIG. 4 is a cross-sectional view A-A of the present invention;
FIG. 5 is a B-B cross-sectional view of the present invention;
FIG. 6 is a C-C cross-sectional view of the present invention;
FIG. 7 is a D-D cross-sectional view of the present invention;
FIG. 8 is an E-E cross-sectional view of the present invention;
FIG. 9 is a functional block diagram of a performance self-test system of the present invention.
Detailed Description
As shown in fig. 1-8, the left end of the cylinder body 2 is fixedly connected with a first connecting lug 38 through a connecting rod 37, a first vent hole 31 is formed in the end plate of the cylinder body 2, a second vent hole 32 is formed in the cover plate 6, and one end of the guide rod 1 sequentially penetrates through the second piston 5, the partition plate 4 and the first piston 3 and is placed in the cylinder body 2; the guide rod 1 is fixedly connected with the second piston 5 and the first piston 3 and can longitudinally slide in the cylinder body 2; the other end of the guide rod 1 passes through the cover plate 6 and is fixedly connected with the force sensor 7, the transmission rod 8, the stepping motor 9 and the second connecting earring 10 in sequence; the cover plate 6 is provided with a second ventilation hole 32; the stepping motor 9 is externally fixed with a cylindrical protective cover 12, and internally integrated with a temperature sensor 11 and a performance self-detection system; the stepper motor 9 is connected with the uninterruptible power supply 28 through a stepper motor power line 39; the baffle plate 4 is fixedly connected with the cylinder body 2, and the baffle plate 4 is provided with an orifice 13 perpendicular to the plane of the baffle plate 4 and a baffle plate hole 14 parallel to the plane of the baffle plate 4; the chamber between the first piston 3 and the second piston 5 in the cylinder body 2 is filled with viscous fluid 36, and the side wall of the cylinder body 2 is provided with a through hole 15 which is vertical to the surface of the cylinder body 2 and is communicated with the baffle hole 14; a baffle 16 is arranged in the through hole 15 and the baffle hole 14, and the baffle 16 can slide in the through hole 15 and the baffle hole 14; the outer end of the baffle 16 is fixed with a flanged connection member 17 made of a material that can be attracted by a magnet; a return spring 18 is arranged between the flanged connection 17 and the cylinder 2; an electromagnet 19 is fixed on the protective cover 12, a gap is reserved between the electromagnet 19 and the flanged connecting piece 17, a space is reserved for outward movement of the flanged connecting piece 17 and the baffle 16, and the electromagnet 19 is connected with the performance self-detection system through an electromagnet power line 33; a displacement sensor 20 is arranged between the protective cover 12 and the cover plate 6; the displacement sensor 20 and the force sensor 7 are connected to the performance self-detection system via a displacement sensor data line 34 and a force sensor data line 35, respectively. The number of the throttle holes 13, the baffle 16, the flanged connection piece 17, the baffle holes 14, the through holes 15, the return springs 18, the electromagnet 19 and the electromagnet power cord 33 are equal and the specification is the same. The material of the protection cover 12, the return spring 18, the cylinder 2 and the partition plate 4 is made of a material that cannot be attracted by a magnet. Preferably, the stepper motor 9 has locking means to ensure that the stepper motor cannot rotate when the viscous fluid damper is in operation. The joint of the first piston 3 and the side wall of the cylinder body 2, the joint of the baffle plate 4 and the guide rod 1, the joint of the second piston 5 and the side wall of the cylinder body 2, and the joint of the baffle plate 16 and the baffle plate hole 14 are all in sealing connection.
The block diagram of the performance self-detection system is shown in fig. 9, and includes a power transmission path composed of a clock 21, a power controller 22, a microprocessor 23, a stepper motor controller 24, a displacement sensor signal demodulation circuit 25, a force sensor signal demodulation circuit 26 and a temperature sensor signal demodulation circuit 27, a command transmission path composed of the microprocessor 23 and the stepper motor controller 24, and a signal transmission path composed of the displacement sensor signal demodulation circuit 25, the force sensor signal demodulation circuit 26, the temperature sensor signal demodulation circuit 27, the microprocessor 23, a data memory 29 and a wireless transmitter 30.
The viscous fluid damper is in a working state by default, the uninterruptible power supply 28 continuously supplies power for the clock 21 and the power supply controller 22, the area of the throttle hole 13 is smaller, the damping force is large when the cylinder body 2 and the guide rod 1 relatively move, and the energy consumption and shock absorption performance are good. When the clock 21 reaches zero minute and zero seconds of the first month and the first day, the viscous fluid damper is converted into a detection state, and the power supply controller 22 supplies power to the electromagnet 19, the stepping motor controller 24, the displacement sensor signal demodulation circuit 25, the force sensor signal demodulation circuit 26, the temperature sensor signal demodulation circuit 27 and the microprocessor 23; the electromagnet 19 generates a magnetic field after being electrified, and the flanged connecting piece 17 is attracted and simultaneously drives the baffle 16 fixedly connected with the electromagnet to move outwards; the microprocessor 23 reads a preset instruction in the data memory 29 and transmits the instruction to the stepper motor controller 24, and the stepper motor controller 24 drives the stepper motor 9 to rotate according to the instruction, so that the transmission rod 8 and the force sensor 7 push the guide rod 1 to move; the displacement sensor signal demodulation circuit 25, the force sensor signal demodulation circuit 26 and the temperature sensor signal demodulation circuit 27 respectively demodulate signals of the displacement sensor 20, the force sensor 7 and the temperature sensor 11 to obtain thrust for pushing the guide rod 1, relative displacement of the guide rod 1 and the cylinder body 2 and damper temperature, and the thrust, the relative displacement and the damper temperature are transmitted to the microprocessor 23; the microprocessor 23 reads a viscous fluid damper damping force calculation program in the data memory 29 according to the acquired relative displacement and temperature to obtain a damping force which theoretically should be provided; the microprocessor 23 further reads the judging program in the data memory 29, compares the theoretical damping force with the actual measured guide rod 1 thrust force, judges whether the viscous fluid damper is normal or not, and transmits the judging result to the wireless transmitter 30; the wireless transmitter 30 notifies the manager of the viscous fluid damper of the judgment result in the form of a short message or mail. After the detection is completed, the stepping motor 9 returns to the original position, the current controller cuts off the power supply of the electromagnet 19, the stepping motor controller 24, the displacement sensor signal demodulation circuit 25, the force sensor signal demodulation circuit 26, the temperature sensor signal demodulation circuit 27 and the microprocessor 23, the magnetism of the electromagnet 19 disappears, the return spring 18 pulls the baffle 16 to return to the original position, and the viscous fluid damper returns to the working state.
Claims (7)
1. The utility model provides a viscous fluid damper of performance self-checking, includes guide arm (1) and cylinder body (2), its characterized in that: the left end of the cylinder body (2) is fixedly connected with a first connecting lug (38) through a connecting rod (37), the guide rod (1) sequentially passes through the first piston (3), the partition plate (4), the second piston (5) and the cover plate (6) from left to right, the right end of the guide rod (1) sequentially passes through a force sensor (7), a transmission rod (8), a stepping motor (9) and a second connecting lug (10) to be fixedly connected, a temperature sensor (11) and a performance self-detection system are integrated inside the stepping motor (9), the stepping motor (9) is fixedly connected with a protective cover (12), the partition plate (4) is fixedly connected with the cylinder body (2), an orifice (13) perpendicular to the plane of the partition plate (4) and a baffle hole (14) parallel to the plane of the partition plate (4) are arranged on the side wall of the cylinder body (2), a through hole (15) is formed in the side wall of the cylinder body (2) and is communicated with the baffle hole (14), a baffle (16) capable of sliding is arranged inside the baffle hole (15) and the baffle hole (14), a spring belt (17) is fixedly connected between the magnet belt (17) and a flange belt (17), an electromagnet (19) which is electrified to adsorb the flanged connecting piece (17) and pull the baffle plate (16) to move outwards is fixed on the protective cover (12), a displacement sensor (20) is arranged between the protective cover (12) and the cover plate (6), and the electromagnet (19), the displacement sensor (20) and the force sensor (7) are all connected with the performance self-detection system; the performance self-detection system comprises a clock (21), a power supply controller (22), a microprocessor (23), a stepping motor controller (24), a displacement sensor signal demodulation circuit (25), a force sensor signal demodulation circuit (26) and a temperature sensor signal demodulation circuit (27), wherein the clock (21) is respectively connected with an uninterruptible power supply (28) and the power supply controller (22), and the microprocessor (23) is respectively connected with the power supply controller (22), the stepping motor controller (24), the displacement sensor signal demodulation circuit (25), the force sensor signal demodulation circuit (26) and the temperature sensor signal demodulation circuit (27);
the electromagnet (19) is electrified to adsorb the flanged connecting piece (17), meanwhile, the baffle plate (16) is driven to move outwards, the microprocessor (23) reads a preset instruction in the data memory (29) and transmits the preset instruction to the stepping motor controller (24), the stepping motor controller (24) drives the stepping motor (9) to rotate according to the instruction, and then the transmission rod (8) and the force sensor (7) push the guide rod (1) to move, and the displacement sensor signal demodulation circuit (25), the force sensor signal demodulation circuit (26) and the temperature sensor signal demodulation circuit (27) demodulate signals of the displacement sensor (20), the force sensor (7) and the temperature sensor (11) respectively and transmit the signals to the microprocessor (23);
the microprocessor (23) is connected with the data memory (29) and the wireless transmitter (30), the microprocessor (23) reads a judging program in the data memory (29), compares theoretical damping force with actual measurement guide rod (1) thrust, judges whether the viscous fluid (36) damper is normal or not, transmits a judging result to the wireless transmitter (30), and the wireless transmitter (30) informs a manager of the viscous fluid damper of the judging result in a form of short message or mail.
2. A viscous fluid damper with self-test performance as recited in claim 1, wherein: the guide rod (1) and the first piston (3) and the second piston (5) which are fixedly connected with the guide rod (1) can longitudinally slide along the cylinder body (2).
3. A viscous fluid damper with self-test performance as recited in claim 1, wherein: the protective cover (12) is cylindrical.
4. A viscous fluid damper with self-test performance as recited in claim 1, wherein: the stepping motor (9) is provided with a locking device.
5. A viscous fluid damper with self-test performance as recited in claim 1, wherein: the protection cover (12), the return spring (18), the cylinder body (2) and the partition plate (4) are made of materials which cannot be adsorbed by the magnet.
6. A viscous fluid damper with self-test performance as recited in claim 1, wherein: the number of the orifices (13), the baffle plates (16), the flanged connecting pieces (17), the baffle plate holes (14), the through holes (15), the reset springs (18) and the electromagnets (19) is the same.
7. A viscous fluid damper with self-test performance as recited in claim 1, wherein: the end plate of the cylinder body (2) is provided with a first vent hole (31), and the cover plate (6) is provided with a second vent hole (32).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810946397.1A CN108868278B (en) | 2018-08-17 | 2018-08-17 | Viscous fluid damper with self-detection performance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810946397.1A CN108868278B (en) | 2018-08-17 | 2018-08-17 | Viscous fluid damper with self-detection performance |
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| CN108868278A CN108868278A (en) | 2018-11-23 |
| CN108868278B true CN108868278B (en) | 2023-09-22 |
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| CN109778674B (en) * | 2019-01-28 | 2021-03-30 | 福建九鼎建设集团有限公司 | Stepless clearance adjusting type viscous damper and using method thereof |
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| KR100865912B1 (en) * | 2007-09-17 | 2008-10-29 | 에스앤티대우(주) | Assembling apparatus of damper comprising magneto-rheological fluid and assembling method of damper using the same |
| CN104154160A (en) * | 2014-08-11 | 2014-11-19 | 浙江建科减震科技有限公司 | Self-resetting viscous damper |
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| CN105735508A (en) * | 2016-03-13 | 2016-07-06 | 北京工业大学 | Input rate amplifying device of viscous damper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10047817B2 (en) * | 2009-01-07 | 2018-08-14 | Fox Factory, Inc. | Method and apparatus for an adjustable damper |
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| KR100865912B1 (en) * | 2007-09-17 | 2008-10-29 | 에스앤티대우(주) | Assembling apparatus of damper comprising magneto-rheological fluid and assembling method of damper using the same |
| CN104154160A (en) * | 2014-08-11 | 2014-11-19 | 浙江建科减震科技有限公司 | Self-resetting viscous damper |
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| CN105735508A (en) * | 2016-03-13 | 2016-07-06 | 北京工业大学 | Input rate amplifying device of viscous damper |
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