阅读说明：本技术 一种基于扭力弹簧挡板控压的黏滞阻尼器 (Viscous damper based on pressure control of torsion spring baffle ) 是由 苏毅 卢伟 郭鹏 李中义 张冲 王枫琦 于 2019-12-12 设计创作，主要内容包括：本发明公开了一种基于扭力弹簧挡板控压的黏滞阻尼器,属于结构抗震与减震的技术领域。当阻尼器振动速度较快时,由于阻尼孔来不及将阻尼介质在两个油缸内交换,而导致油缸压强骤增,威胁阻尼器的安全。本发明用双路通液管将油缸A和油缸B连通起来,并在其内设置压强调节装置。该装置受扭力弹簧压迫挡板关闭通液管,仅当两油缸压强差达到预设值时,扭力弹簧受力后带动挡板转动,从而连通通液管,增大阻尼介质通路面积,达到自动卸压的目的,防止阻尼器爆缸。由于阻尼器是往复运动的,双路通液管总是一路关闭,一路连通。本发明结构简单,无需外部能量或复杂的构造,故其安全性和耐久性都很好,且减震防护效果好。(The invention discloses a viscous damper based on pressure control of a torsion spring baffle, and belongs to the technical field of structural seismic resistance and shock absorption. When the vibration speed of the damper is high, the damping holes are not in time to exchange damping media in the two oil cylinders, so that the pressure of the oil cylinders is increased suddenly, and the safety of the damper is threatened. The invention uses a double-way liquid pipe to connect the oil cylinder A and the oil cylinder B, and a pressure adjusting device is arranged in the oil cylinder A and the oil cylinder B. The device is pressed by the torsion spring to close the liquid through pipe, and only when the pressure difference of the two oil cylinders reaches a preset value, the torsion spring drives the baffle to rotate after being stressed, so that the liquid through pipe is communicated, the area of a damping medium passage is increased, the purpose of automatic pressure relief is achieved, and the damper is prevented from cylinder explosion. Because the damper moves in a reciprocating mode, the two liquid through pipes are always closed and communicated. The invention has simple structure, does not need external energy or complex structure, has good safety and durability and good damping protection effect.)

1. The utility model provides a viscidity attenuator based on torsion spring baffle accuse pressure, its is including filling hydro-cylinder A (4) and hydro-cylinder B (9) that have the damping medium, and piston rod (3) stretch out the one end of hydro-cylinder B (9) and fix with connection earrings (12), and the one end that piston rod (3) stretch out hydro-cylinder A (4) is stretched into in vice jar (2), is provided with piston (10) on piston rod (3), is equipped with damping hole (11) on piston (10), its characterized in that: a liquid through pipe A (7) and a liquid through pipe B (8) are arranged between the oil cylinder A (4) and the oil cylinder B (9) to respectively communicate the oil cylinder A and the oil cylinder B, wherein a pressure regulating device A (5) is arranged in the liquid through pipe A (7), and a pressure regulating device B (6) is arranged in the liquid through pipe B (8).

2. The viscous damper based on the pressure control of the torsion spring baffle plate as claimed in claim 1, wherein: and the liquid passing pipe A (7) and the liquid passing pipe B (8) are hollow steel round pipes or square pipes and are respectively connected with the oil cylinder A (4) and the oil cylinder B (9) in a welding manner.

3. The viscous damper based on the pressure control of the torsion spring baffle plate as claimed in claim 1, wherein: a torsion spring A (13) arranged in the pressure adjusting device A (5) is fixed in the liquid through pipe A (7) through a torsion spring hook shaft A (14) and a baffle plate A (15), the baffle plate A (15) is connected with a fixed shaft A (17) in a welding mode, and the baffle plate A (15) is restrained by a limiting stop block A (16) around the fixed shaft A (17).

4. The viscous damper based on the pressure control of the torsion spring baffle plate as claimed in claim 1, wherein: a torsion spring B (18) arranged in the pressure adjusting device B (6) is fixed in the liquid through pipe B (8) through a torsion spring hook shaft B (19) and a baffle plate B (20), the baffle plate B (20) is connected with a fixed shaft B (22) in a welding mode, and the baffle plate B (20) is restricted by a limiting stop block B (21) around the fixed shaft B (22).

5. A pressure regulating device a as claimed in claim 3, characterized in that: the baffle A (15) is a steel circular plate, the outer diameter of the baffle A (15) is smaller than the inner diameter of the liquid passing pipe A (7) by 1-2 mm, the baffle A (15) can rotate around a fixed shaft A (17) along with the stress of a torsion spring A (13), a limit stop A (14) is welded on the liquid passing pipe A (7), the fixed shaft A (17) is a telescopic rotating shaft, and the baffle A (15) is fixedly installed in a reserved concave point A (23) of the liquid passing pipe A (7).

6. A pressure regulating device B as claimed in claim 4, characterized in that: the baffle B (20) is a steel circular plate, the outer diameter of the steel circular plate is smaller than the inner diameter of the liquid passing pipe B (8) by 1-2 mm, the baffle B (20) can rotate around the fixed shaft B (22) along with the stress of the torsion spring B (18), the limit stop B (21) is welded on the liquid passing pipe B (8), the fixed shaft B (22) is a telescopic rotating shaft, and the limit stop B is installed and fixed in a reserved concave point B (24) of the liquid passing pipe B (8).

Technical Field

The invention relates to the technical field of structural seismic and shock absorption engineering dampers, in particular to a viscous damper based on pressure control of a torsion spring baffle.

Background

The viscous damper is a structure similar to a piston, two sides of the piston are filled with viscous damping medium fluid, and when the piston moves relatively, the damping medium fluid generates throttling resistance when passing through a damping hole, so that the viscous damper is a damper related to the movement speed. According to the multiple post-disaster investigation after the major earthquake, the viscous damper is an effective damping protection device for the earthquake resistance and shock absorption of the building structure, and can effectively reduce the damage of the earthquake to the structure. The viscous damper can effectively reduce vibration caused by an earthquake, mainly because the damping of the structure is increased, the two ends of the viscous damper rapidly reciprocate under the action of the earthquake, and most energy is dissipated through the damping force generated by the damping holes, so that a main structure is protected.

Under the action of earthquake or strong wind, the two ends of the viscous damper can generate relative motion to drive the piston in the oil cylinder to generate rapid reciprocating motion. Because the oil cylinder is filled with viscous damping medium fluid and the damping hole on the piston is smaller, when the motion speed and the motion amplitude are not large, the damping medium in the oil cylinders at the two sides can be exchanged by being sprayed through the damping hole; however, when the movement speed and the movement amplitude are large, the damping medium is difficult to rapidly exchange through the damping hole, so that the pressure in the oil cylinder rises suddenly, the cylinder of the viscous damper is likely to be exploded or the piston rod is likely to bend, and the viscous damper is even finally damaged.

Disclosure of Invention

In order to solve the technical problems, the invention provides a damper which has a simple structure, prevents the pressure intensity of a damping medium in the damper from being too high, can improve the damping and energy-dissipating effects of the damper, and can improve the safety and durability of the structure. The invention uses a double-way liquid pipe to communicate with the oil cylinders at two sides of the piston, but is provided with a pressure intensity adjusting device for controlling the pressure by a torsion spring baffle. When the pressure difference between the two sides is overlarge, the torsion spring baffle is opened, so that the damping medium in the oil cylinder with larger pressure can enter the oil cylinder with smaller pressure on the other side through the liquid through pipe. Because the damper moves in a reciprocating mode, the two liquid through pipes are always closed and communicated.

The damping device comprises an oil cylinder A and an oil cylinder B filled with damping media, wherein one end of a piston rod extends out of the oil cylinder B and then is fixed with a connecting lug ring, and a sealing element is arranged at a hole of the oil cylinder B to prevent the damping media from flowing out. The other end of the piston rod extends out of the oil cylinder A and enters the auxiliary cylinder, and a sealing piece is arranged at the hole of the oil cylinder A to prevent the damping medium from flowing out. The piston rod is provided with a piston, and the piston is provided with a damping hole. Gaps are reserved between the piston and the inner walls of the cylinder body of the oil cylinder A and the oil cylinder B, so that the piston does not rub against the inner side of the cylinder body when reciprocating in the cylinder. The piston rod plays a guiding role, so that the piston is always in a concentric shaft state with the cylinder body when moving. When reciprocating motion occurs, damping media in the oil cylinders at two sides can be sprayed through the damping holes to perform liquid exchange. A liquid passing pipe A and a liquid passing pipe B are respectively arranged between the oil cylinder A and the oil cylinder B to respectively communicate the oil cylinder A and the oil cylinder B, wherein a pressure regulating device A is arranged in the liquid passing pipe A, and a pressure regulating device B is arranged in the liquid passing pipe B. Liquid pipe A and liquid pipe B lead to the liquid pipe and are hollow steel pipe or square pipe, and their both ends weld respectively on hydro-cylinder A and hydro-cylinder B, and pressure adjusting device A, B sets up the inside at liquid pipe A, B respectively. The torsion spring that pressure adjusting device inside set up passes through torsion spring couple axle and baffle to be fixed in leading to the liquid pipe, and torsion spring's drag hook links to each other with the couple axle hook, can play the effect of fixed torsion spring one end, and the baffle links to each other with the fixed axle welding, and the baffle is restricted by spacing dog around fixed axle pivoted direction, and the fixed axle can play fixed baffle and drive baffle pivoting effect simultaneously. The torsion spring hook shaft and the limit stop are fixed inside the liquid through pipe in a welding mode. When the damper reciprocates, the cylinder bodies on two sides of the piston have pressure difference, the baffle plate of the pressure regulating device is subjected to force transmitted by liquid, and when the force is larger than the opposite force prepressed on the baffle plate by a torsion spring arranged in the baffle plate, the baffle plate can rotate around a fixed shaft of the baffle plate, so that the liquid through pipe is communicated, the pressure of the liquid through pipe is automatically relieved in the working process of the damper, and the cylinder explosion of the damper is prevented. The limit stop can limit the rotation direction of the baffle, and the baffle can rotate around the fixed shaft of the baffle due to the pre-pressing force of the torsion spring, so that the limit stop limits the rotation position of the baffle in the direction. When the baffle contacts with the limit stop, the liquid through pipe is closed by the baffle. The baffle is a steel circular plate, the outer diameter of the baffle is smaller than the inner diameter of the liquid through pipe by 1-2 mm, the baffle is welded with one end of the torsion spring together, the baffle can rotate around the fixed shaft along with the stress of the torsion spring, the limit stop is welded on the liquid through pipe, the fixed shaft is a telescopic rotating shaft, and the fixed shaft is compressed during installation and clamped in a reserved concave point of the liquid through pipe. The reserved concave point is used for installing a fixed shaft, and the fixed shaft is placed in the reserved concave point of the liquid through pipe through a telescopic clamp. Because the piston moves in a bidirectional reciprocating mode, the two liquid through pipe channels are arranged for pressure relief. When the oil cylinder A is compressed to enable the pressure intensity to reach a certain value, the baffle plate in the pressure intensity adjusting device A of the liquid passing pipe is subjected to force caused by the pressure intensity difference of the damping media on the two sides, the force exceeds the pre-pressing force of the torsion spring on the baffle plate, the baffle plate is pushed to rotate around the fixed shaft of the baffle plate, the liquid passing pipe A is opened, the area of the damping media communicated with the oil cylinder B is increased, and therefore the pressure reduction purpose is achieved. At this time, the liquid flowing pipe B is closed due to the existence of the limit stop inside the pressure regulating device B. Similarly, when the oil cylinder B is compressed to enable the pressure intensity of the oil cylinder B to reach a certain value, the baffle plate in the pressure intensity adjusting device B of the liquid passing pipe is subjected to force caused by the pressure intensity difference of the damping media at two sides, the force exceeds the pre-pressing force of the torsion spring on the baffle plate, the baffle plate is pushed to rotate around the fixed shaft of the baffle plate, the liquid passing pipe B is opened, and the area of the damping media communicated with the oil cylinder A is increased, so that the pressure reduction purpose is realized. At this time, the pressure regulating device A is closed due to the existence of the limit stop inside the pressure regulating device A. The torsion springs have two functions, one function is that the safety threshold value of the pressure in the oil cylinder can be set by selecting the torsion springs with different elastic parameters, and the pressure is released after the safety threshold value is exceeded; and secondly, when the pressure reaches a set value, the torsion spring can drive the baffle plate connected with the torsion spring to rotate. The pressure adjusting device is connected with the liquid through pipe in a welding mode. In order to facilitate installation, debugging, maintenance and replacement, the steel pipes close to the pressure regulating device are welded and connected, so that a good sealing effect and sufficient pressure resistance are ensured.

After the structure is adopted, when the structure is subjected to earthquake or strong wind, vibration can be generated, and the piston can generate corresponding reciprocating motion. During the working process of the damper, the piston always compresses one cylinder, and the volume of the other cylinder is increased along with the increase of the volume, so that the pressure of the damping medium in the cylinder with the compressed volume can be increased continuously during the movement. When the pressure in the oil cylinder on one side is greater than the preset value, the damping medium in the oil cylinder on one side can force the torsion spring in the pressure adjusting device corresponding to the damping medium to drive the connected baffle plate to rotate around the shaft and be communicated with the liquid through pipe, and the damping medium is communicated with liquid through the liquid through pipe as well as the damping hole in the piston, so that the purpose of rapidly reducing the pressure of the oil cylinder on one side is achieved, and the damper is prevented from cylinder explosion. In order not to have the critical parameters of the damper greatly influenced, it must be ensured that this damping medium circulation takes place quickly, so that the fluid injection mechanism of the piston rod out of the damping orifice is not affected. Therefore, the cross-sectional area of the liquid through pipe is set to be more than three times of that of the damping hole, so that the pressure in the oil cylinder A and the oil cylinder B is rapidly stabilized, the risk coefficient is reduced, in addition, the damper is simple in structure, the pressure can be automatically adjusted through the torsion spring baffle, all parts and accessories can be prefabricated in a factory, all parts can be replaced and maintained, and the damper is economical and reasonable. The viscous damper controlled by the torsion spring baffle can ensure stable hysteresis curve, has better damping effect, higher safety factor and high structural durability, and can be used at low cost for a long time.

The working process 1 of the viscous damper based on pressure control of the torsion spring baffle disclosed by the invention is as follows:

when the connecting lug ring (12) moves towards the spherical hinged support (1), the piston rod (3) is driven to move similarly, the volume of the oil cylinder B (9) is increased, the volume of the oil cylinder A (4) is reduced, and at the moment, the damping medium generates jet flow through the damping hole on the piston, namely, the damping medium flows into the oil cylinder B (9) from the oil cylinder A (4). Due to the movement of the damper, the pressure intensity of the damping medium in the oil cylinder A (4) is increased due to the fact that the damping medium is pressed, when the pressure intensity in the oil cylinder A (4) reaches or exceeds a safety threshold value of the pressure intensity in the oil cylinder, the damping medium can drive the baffle plate A (15) to twist towards the oil cylinder B (9) through the extrusion torsion spring A (13), and therefore the damping medium flows into the oil cylinder B (9) through the pressure intensity adjusting device. When the pressure of the oil cylinder A (4) is smaller than the safety threshold of the pressure in the oil cylinder, the torsion spring A (13) drives the baffle A (15) to return to the balance position. The automatic control of the torsion spring ensures that the pressure in the damping medium is not too high to threaten the safety of the damper.

The working process 2 of the viscous damper based on pressure control of the torsion spring baffle is as follows:

when the spherical hinged support (1) moves towards the connecting lug ring (12), the piston rod (3) is driven to move similarly, the volume of the oil cylinder B (9) is reduced, the volume of the oil cylinder A (4) is increased, and at the moment, the damping medium generates jet flow through the damping hole on the piston, namely flows into the oil cylinder A (4) from the oil cylinder B (9). Due to the movement of the damper, the damping medium in the oil cylinder B (9) is pressed to increase the pressure, the pressure in the oil cylinder B (9) reaches or exceeds a safety threshold value of the pressure in the oil cylinder, the damping medium can drive the baffle B (20) to twist towards the oil cylinder A (4) by extruding the torsion spring B (18), and therefore the damping medium flows into the oil cylinder A (4) through the pressure adjusting device. When the pressure of the oil cylinder B (9) is smaller than the safety threshold of the pressure in the oil cylinder, the torsion spring B (18) drives the baffle B (20) to return to the balance position. The automatic control of the torsion spring ensures that the pressure in the damping medium is not too high to threaten the safety of the damper.

Drawings

In order to more clearly illustrate the technical solution of the present invention in the examples, the drawings needed in the description of the examples will be briefly introduced below, and the drawings in the following description are only some examples of the present invention.

FIG. 1 is a schematic view of an overall viscous damper based on pressure control of a torsion spring damper;

FIG. 2 is a schematic view of a pressure adjustment device A;

FIG. 3 is a schematic view of a pressure adjustment device B;

FIG. 4 is a schematic diagram of a reserved pit A;

FIG. 5 is a schematic diagram of reserved pit B;

FIG. 6 is a detail view of the pressure adjustment device;

FIG. 7 is a schematic view of a stationary shaft;

FIG. 8 is a front view of the torsion spring;

fig. 9 is a side view of the torsion spring.

In fig. 1 to 7, 1 is a spherical hinge base; 2 is an auxiliary cylinder; 3 is a piston rod; 4 is an oil cylinder A; 5 is a pressure regulating device A; 6 is a pressure regulating device B; 7 is a liquid through pipe A; 8 is a liquid through pipe B; 9 is an oil cylinder B; 10 is a piston; 11 is a damping hole; 12 is a connecting earring; 13 is a torsion spring A; 14 is a torsion spring hook shaft A; 15 is a baffle A; 16 is a limit stop A; a fixed shaft A is 17; 18 is a torsion spring B; 19 is a torsion spring hook shaft B; 20 is a baffle B; 21 is a limit stop B; 22 is a fixed shaft B; 23 is a reserved concave point A; pit B is reserved for 24.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic view of the overall structure of a viscous damper based on the pressure control of a torsion spring damper according to the present invention. As shown in figure 1, the damper mainly comprises an oil cylinder, an auxiliary cylinder, a piston rod and a pressure adjusting device, wherein the oil cylinder is divided into an oil cylinder A (4) and an oil cylinder B (9), and the oil cylinder A (4) and the oil cylinder B (9) are filled with the same damping medium. The piston (10) is arranged between the oil cylinder A (4) and the oil cylinder B (9) and can move back and forth along the axial direction of the oil cylinder, so that a piston rod (3) connected with the piston is driven to move together, the pressure of various viscous dampers in the prior art can not be regulated and controlled, and once the pressure in the dampers is too high, the dampers can be damaged and the safety of an engineering structure is greatly influenced.

(1) As shown in fig. 1, welding a spherical hinge seat 1 at one end of an integral member of an oil cylinder and an auxiliary cylinder prefabricated in a factory, forming holes at two sides of an oil cylinder A (4) and an oil cylinder B (9), and sealing and welding a liquid connecting pipe A (7) and a liquid connecting pipe B (8), wherein in order to install and install a pressure adjusting device, the liquid connecting pipe is disconnected near the position where the pressure adjusting device is installed, and then is welded after the pressure adjusting device is installed;

(2) as shown in fig. 2, the torsion spring a (13) is welded with the baffle plate a (15), then the baffle plate a (15) is fixed with the fixed shaft a (17), and the torsion spring hook shaft a (14) and the limit stop a (16) are welded in the liquid through pipe a (7);

(3) as shown in fig. 3, the torsion spring B (18) is welded with the baffle B (20), then the baffle B (20) is fixed with the fixed shaft B (22), and the torsion spring hook shaft B (19) and the limit stop B (21) are welded in the liquid through pipe B (8);

(4) as shown in fig. 4 and 5, a reserved concave point is arranged in the liquid through pipe and is used for installing the clamping and placing fixed shaft;

(5) as shown in fig. 6 and 7, the fixed shaft is a telescopic rotating shaft, and is welded with the baffle plate, a spring is arranged in the shaft, and the shaft can be placed in a reserved concave point of the liquid through pipe by adjusting the length of the shaft in a telescopic way;

(6) as shown in fig. 8 and 9, the spring is a torsion spring, and when a force is applied to the torsion spring, the torsion spring is twisted to drive the baffle plate connected with the torsion spring to rotate, so that the purpose of automatically releasing pressure is achieved.

When the viscous damper based on the pressure control of the torsion spring baffle plate is used, the piston can move back and forth in the oil cylinder A and the oil cylinder B, and viscous resistance can be generated when a damping medium passes through the damping hole, so that the anti-seismic and shock-absorbing effects are achieved.