CN108868278B - A performance self-testing viscous fluid damper - Google Patents

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

A performance self-testing viscous fluid damper

Technical field

The invention belongs to a vibration control device for civil engineering structures, and is specifically a viscous fluid damper with self-testing performance.

Background technique

Earthquakes are one of the most destructive sudden natural disasters faced by mankind, and they are also a disaster event that has occurred with high frequency in recent years. Our country is located between the Pacific Rim and the Eurasian seismic belt. It is one of the countries with the most frequent seismic activity in the world. More than half of its land area is seriously threatened by earthquakes. Previous earthquake investigation results have shown that the damage and collapse of buildings are the main causes of casualties and economic losses. As urbanization accelerates and urban buildings and populations become increasingly dense, earthquake damage may become more severe. Therefore, how to reduce the vibration of buildings, especially high-rise and super-high-rise buildings, under earthquake action, thereby reducing structural damage and collapse, and achieving the purpose of reducing casualties and economic losses, is a major issue faced in the field of civil construction engineering.

Energy-consuming shock-absorbing technology is to install energy-consuming shock-absorbing devices in certain parts of the building structure. The energy-consuming shock-absorbing devices are used to absorb and consume the energy input from the earthquake to the structure, reduce the vibration of the building structure, and thereby reduce the damage and damage of the building structure. Collapse has become the main measure for shock absorption control of engineering structures. The viscous fluid damper is an energy-dissipating shock absorbing device that uses the relative motion between the internal piston and the cylinder to force the viscous fluid in the cylinder to flow through the orifice to generate damping force, thereby dissipating seismic energy.

The service life of building structures lasts for decades or even hundreds of years, so viscous fluid dampers installed on building structures are also required to have long-term reliability. However, during long-term use of viscous fluid dampers, durability problems such as seal ring failure, viscous fluid segregation, viscous fluid leakage, and piston movement obstruction may occur, resulting in poor energy-consuming shock absorption performance of viscous fluid dampers. Reduced or even lost, the safety of the building structure cannot be guaranteed when an earthquake strikes. Therefore, timely and accurate understanding of the performance of viscous fluid dampers is crucial to ensure the safety of building structures under earthquake action. Viscous fluid dampers installed on building structures are not only numerous in number but also dispersed in location. Existing non-destructive testing methods cannot effectively detect the performance of viscous fluid dampers, and disassembly experimental testing has the disadvantages of being time-consuming, laborious, and expensive, and viscous fluid dampers are often installed inside walls or in places that are difficult for inspection personnel to reach. It is difficult to implement non-destructive testing and disassembly experimental testing in actual projects.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the purpose of the invention is to provide a performance self-testing viscous fluid damper that can automatically and regularly detect energy-consuming damping performance, so that managers can dampen abnormal viscous fluids. The device should be replaced in time to ensure the safety of the building structure in the event of an earthquake.

Technical solution: A viscous fluid damper with self-testing performance according to the present invention includes a guide rod and a cylinder. The left end of the cylinder is fixedly connected to the first connecting earring through a connecting rod, and the guide rod passes through it in sequence from left to right. After passing the first piston, partition plate, second piston and cover plate, the right end of the guide rod is fixedly connected through the force sensor, transmission rod, stepper motor and second connection earring. The stepper motor is integrated with a temperature sensor and performance self-test. system, the stepper motor is fixedly connected to the protective cover, and the partition is fixedly connected to the cylinder. The partition has a throttling hole perpendicular to the plane of the partition and a baffle hole parallel to the plane of the partition. There are vertical holes on the side wall of the cylinder. A through hole is formed on the surface of the cylinder and is connected to the baffle hole. A sliding baffle is provided inside the through hole and the baffle hole. A flanged connector that can be attracted by a magnet is fixed at the outer end of the baffle. The flanged connector is A return spring is set between the protective cover and the cylinder. An electromagnet is fixed on the protective cover that absorbs the flange connector and pulls the baffle to move outward after being powered on. A displacement sensor is provided between the protective cover and the cover plate. The electromagnet, displacement sensor, The force sensors are connected to the performance self-monitoring system.

The performance self-testing system includes a clock, power controller, microprocessor, stepper motor controller, displacement sensor signal demodulation circuit, force sensor signal demodulation circuit and temperature sensor signal demodulation circuit. The clock is connected to the uninterruptible power supply and power supply respectively. The controller is connected, and the microprocessor is respectively connected to the power controller, the stepper motor controller, the displacement sensor signal demodulation circuit, the force sensor signal demodulation circuit, the temperature sensor signal demodulation circuit, the data memory and the wireless transmitter. After the electromagnet is energized, it attracts the flanged connector and drives the baffle to move outward. The microprocessor reads the predetermined instructions in the data memory and transmits them to the stepper motor controller. The stepper motor controller drives the stepper motor according to the instructions. rotation, and then promote the movement of the guide rod through the transmission rod and force sensor. The displacement sensor signal demodulation circuit, the force sensor signal demodulation circuit and the temperature sensor signal demodulation circuit respectively demodulate the signals of the displacement sensor, force sensor and temperature sensor, and transmit to the microprocessor. The microprocessor reads the judgment program in the data memory, compares the theoretical damping force with the measured guide rod thrust, judges whether the viscous fluid damper is normal, and transmits the judgment result to the wireless transmitter, which sends a text message or email. Notify the manager of the viscous fluid damper of the determination.

The guide rod and the first piston and the second piston fixedly connected to the guide rod can slide longitudinally along the cylinder. The protective cover is cylindrical. The stepper motor has a locking device to ensure that the stepper motor cannot rotate when the viscous fluid damper is in working condition. The protective cover, return spring, cylinder and partition are all made of materials that cannot be attracted by magnets. The number of orifices, baffles, flanged connectors, baffle holes, through holes, return springs, and electromagnets is the same. There is a first vent hole on the cylinder end plate, and a second vent hole on the cover plate.

Working principle: The viscous fluid damper is in the working state by default, the area of the throttle hole is small, the damping force when the cylinder and the guide rod move relative to each other is large, and the energy consumption and shock absorption performance is good. When the clock reaches 0:00:00 on January 1st, the viscous fluid damper switches to the detection state. After the electromagnet is energized, it attracts the flange connector and pulls the baffle to move outward, greatly increasing the area of the orifice. , greatly reducing the external force required to push the guide rod, so that the stepper motor can easily push the guide rod to move; the stepper motor pushes the guide rod to slide in the cylinder through the transmission rod and the force sensor; by comparing the force sensor of the guide rod during the movement The measured thrust and the theoretical damping force calculated by the microprocessor determine whether the performance of the viscous fluid damper is abnormal, and the detection results are wirelessly sent to the manager. After the detection is completed, the electromagnet is disconnected and the electromagnetism disappears, the return spring pulls the baffle back to its original position, and the viscous fluid damper returns to the working state.

Beneficial effects: Compared with the prior art, the present invention has the following significant features: the present invention consumes seismic energy through the relative movement of the guide rod and the cylinder, and the damping force generated by the piston pushing the viscous fluid to flow through the partition orifice. , which is conducive to greatly reducing the vibration of the building structure under the action of earthquakes and ensuring the safety of the building structure when an earthquake occurs; the performance self-detection system integrated inside the viscous fluid damper of the present invention regularly uses a stepper motor to push the guide rod to move to generate damping Force, by comparing the actual measured guide rod thrust of the force sensor and the theoretical damping force calculated by the microprocessor, it can be judged whether there is an abnormality in the viscous fluid damper. It has an automatic detection function of the viscous fluid damper performance, which is helpful to ensure that it is installed in the building structure. The long-term effectiveness of the viscous fluid damper; the invention can automatically send the detection results to the manager of the viscous fluid damper without requiring on-site operation by the detector, and has the advantages of low cost, easy implementation, non-destructiveness, etc., and can be used in It is widely used in vibration control of various building structures.

Description of the drawings

Figure 1 is a schematic diagram of a performance self-testing viscous fluid damper of the present invention;

Figure 2 is a schematic longitudinal cross-sectional view of the cylinder of the present invention;

Figure 3 is a schematic longitudinal cross-sectional view of the partition of the present invention;

Figure 4 is an A-A cross-sectional view of the present invention;

Figure 5 is a B-B cross-sectional view of the present invention;

Figure 6 is a C-C cross-sectional view of the present invention;

Figure 7 is a D-D cross-sectional view of the present invention;

Figure 8 is an E-E cross-sectional view of the present invention;

Figure 9 is a functional block diagram of the performance self-detection system of the present invention.

Detailed ways

As shown in Figure 1-8, the left end of the cylinder 2 is fixedly connected to the first connecting earring 38 through the connecting rod 37. The end plate of the cylinder 2 is provided with a first ventilation hole 31, and the cover plate 6 is provided with a second ventilation hole. 32. One end of the guide rod 1 passes through the second piston 5, the partition 4 and the first piston 3 in sequence, and is placed inside the cylinder 2; the guide rod 1 is fixedly connected to the second piston 5 and the first piston 3, and can be The cylinder 2 slides longitudinally inside; 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 stepper motor 9 and the second connecting earring 10 in turn; the cover plate 6 is provided with a second Ventilation hole 32; a cylindrical protective cover 12 is fixed on the outside of the stepper motor 9, and a temperature sensor 11 and a performance self-detection system are integrated inside; the stepper motor 9 is connected to the uninterruptible power supply 28 through the stepper motor power cord 39; the partition 4 Fixedly connected to the cylinder 2, the partition 4 has a throttling hole 13 perpendicular to the plane of the partition 4 and a baffle hole 14 parallel to the plane of the partition 4; the first piston 3 and the second piston 5 inside the cylinder 2 The chamber between is filled with viscous fluid 36, and the side wall of the cylinder 2 has a through hole 15 perpendicular to the surface of the cylinder 2 and connected with the baffle hole 14; a baffle 16 is provided inside the through hole 15 and the baffle hole 14, 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 connector 17 made of a material that can be absorbed by magnets; the flanged connector 17 is connected to the cylinder 2 There is a return spring 18 between them; an electromagnet 19 is fixed on the protective cover 12, and there is a gap between the electromagnet 19 and the flanged connector 17, leaving space for the flanged connector 17 and the baffle 16 to move outward. The electromagnet 19 is connected to the performance self-detection system through the electromagnet power line 33; a displacement sensor 20 is provided between the protective cover 12 and the cover plate 6; the displacement sensor 20 and the force sensor 7 are respectively connected through the displacement sensor data line 34 and the force sensor data line. 35 is connected to the performance self-testing system. The orifice 13, the baffle 16, the flanged connector 17, the baffle hole 14, the through hole 15, the return spring 18, the electromagnet 19 and the electromagnet power cord 33 have the same quantity and specifications. The protective cover 12, the return spring 18, the cylinder 2 and the partition 4 are made of materials that cannot be attracted by magnets. Preferably, the stepper motor 9 has a locking device to ensure that the stepper motor cannot rotate when the viscous fluid damper is in working condition. The joint between the first piston 3 and the side wall of the cylinder 2, the joint between the partition plate 4 and the guide rod 1, the joint between the second piston 5 and the side wall of the cylinder 2, the joint between the baffle 16 and the baffle hole 14 All sealed connections.

Among them, the performance self-test system block diagram is shown in Figure 9, including a clock 21, a power controller 22, a microprocessor 23, a stepper motor controller 24, a displacement sensor signal demodulation circuit 25, and a force sensor signal demodulation circuit 26. The power transmission path composed of the temperature sensor signal demodulation circuit 27 also includes an instruction transmission path composed of the microprocessor 23 and the stepper motor controller 24, as well as the displacement sensor signal demodulation circuit 25 and the force sensor signal demodulation circuit. 26. The signal transmission path consists of the temperature sensor signal demodulation circuit 27, the microprocessor 23, the data memory 29 and the wireless transmitter 30.

The above-mentioned viscous fluid damper is in the working state by default. The uninterruptible power supply 28 continuously supplies power to the clock 21 and the power controller 22. The area of the orifice 13 is small, and the damping force when the cylinder 2 and the guide rod 1 move relative to each other is large. The energy consumption and shock absorption performance are good. When the clock 21 reaches 0:00:00 on January 1, the viscous fluid damper switches to the detection state, and the power controller 22 is the electromagnet 19, the stepper 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 provide power; the electromagnet 19 generates a magnetic field after being energized, adsorbing the flange connector 17, and at the same time driving the baffle 16 fixedly connected to it to move outward. ; The microprocessor 23 reads the predetermined instructions in the data memory 29 and transmits them to the stepper motor controller 24. The stepper motor controller 24 drives the stepper motor 9 to rotate according to the instructions, and then pushes the guide through the transmission rod 8 and the force sensor 7. Rod 1 moves; the displacement sensor signal demodulation circuit 25, the force sensor signal demodulation circuit 26 and the temperature sensor signal demodulation circuit 27 demodulate the signals of the displacement sensor 20, the force sensor 7 and the temperature sensor 11 respectively, and obtain the force of pushing the guide rod 1 The thrust, the relative displacement between the guide rod 1 and the cylinder 2 and the damper temperature are transmitted to the microprocessor 23; the microprocessor 23 reads the viscous fluid damper damping in the data memory 29 based on the collected relative displacement and temperature. The force calculation program is used to obtain the theoretical damping force; the microprocessor 23 further reads the judgment program in the data memory 29, compares the theoretical damping force with the measured guide rod 1 thrust, and judges whether the viscous fluid damper is normal, and The judgment result is transmitted 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 text message or email. After the detection is completed, the stepper motor 9 returns to the original position, and the current controller cuts off the electromagnet 19, the stepper 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 and the power supply of the microprocessor 23, the magnetism of the electromagnet 19 disappears, the return spring 18 pulls the baffle 16 back 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).