A self-adjusting damper based on temperature change

Abstract

The present invention discloses a temperature change-based self-adjusting damper, comprising a hydraulic system, two groups of self-adjusting damping mechanisms and connecting components; the hydraulic system comprises a hydraulic cylinder, a piston rod and a piston; the inner cavity of the hydraulic cylinder is divided into a hydraulic cavity and an air cavity; the bottom end of the piston rod vertically penetrates into the hydraulic cylinder from the top of the hydraulic cylinder and is located inside the air cavity; the top end of the piston rod leaks out of the hydraulic cylinder; a piston is sleeved on the rod body of the piston rod located in the hydraulic cavity, and the piston divides the hydraulic cavity into an upper cavity and a lower cavity; the hydraulic cylinder is provided with an upper oil outlet and a lower oil outlet; a group of self-adjusting damping mechanisms is arranged at the upper oil outlet, and another group of self-adjusting damping mechanisms is arranged at the lower oil outlet; the two groups of self-adjusting damping mechanisms are interconnected through connecting components; the present invention can ensure a relatively stable anti-sway and shock-absorbing effect under the condition of a large temperature difference in the working environment.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction and isolation, and in particular to a self-adjusting damper based on temperature change. Background Art

[0002] Earthquakes, as sudden natural disasters, cause serious damage to building structures and are the main cause of casualties and property losses. In order to improve the seismic performance of buildings, seismic isolation technology is widely used, among which vibration isolation bearings are the main means. Rubber isolation bearings, friction pendulum isolation bearings, sliding isolation bearings, rolling isolation bearings and damping isolation bearings all show good seismic isolation effects.

[0003] However, the vibration isolation effect is affected by many factors, and temperature changes are particularly critical. Taking northern my country as an example, the temperature difference between winter and summer can reach 30~40℃, which has a particularly significant impact on liquid viscous damping vibration isolation bearings. The increase in temperature causes the viscosity of the damping oil to decrease, reducing the internal friction resistance, thereby reducing the damping effect of the damper; the decrease in temperature causes the viscosity of the damping oil to increase, increasing the internal friction resistance and improving the damping effect of the damper. This drastic change in viscosity causes the seismic isolation performance of the liquid viscous damping vibration isolation bearing to be unstable, making it difficult to meet actual application requirements.

[0004] Therefore, it is very important to develop a self-adjusting damper that can adapt to large temperature differences. This damper needs to maintain a stable damping effect under different temperature environments, effectively improve the seismic isolation performance of the isolation bearing, and provide reliable protection for building safety. Summary of the invention

[0005] The object of the present invention is to provide a self-adjusting damper based on temperature change to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A self-adjusting damper based on temperature change, comprising a hydraulic system, two sets of self-adjusting damping mechanisms and connecting components;

[0008] The hydraulic system comprises a hydraulic cylinder, a piston rod and a piston;

[0009] The inner cavity of the hydraulic cylinder body is divided into two upper and lower independent hydraulic cavities and an air cavity;

[0010] The bottom end of the piston rod vertically penetrates into the hydraulic cylinder body from the top of the hydraulic cylinder body and is located inside the air chamber;

[0011] The top end of the piston rod leaks out of the hydraulic cylinder body;

[0012] The piston rod is located in the hydraulic chamber and the piston is sleeved on the rod body, and the piston divides the hydraulic chamber into an upper chamber and a lower chamber;

[0013] The upper chamber and the lower chamber are filled with hydraulic oil;

[0014] An upper oil outlet and a lower oil outlet are provided on the side wall of the hydraulic cylinder body, and the upper oil outlet and the lower oil outlet correspond to the positions of the upper cavity and the lower cavity respectively;

[0015] The upper oil outlet is provided with one set of the self-adjusting damping mechanisms, and the lower oil outlet is provided with another set of the self-adjusting damping mechanisms;

[0016] The two groups of the self-adjusting damping mechanisms are connected to each other through the connecting component;

[0017] The self-adjusting damping mechanism is used to automatically increase the flow rate when the temperature decreases, or to automatically reduce the flow rate when the temperature increases.

[0018] Furthermore, the self-adjusting damping mechanism comprises a fixed pipe, a damping assembly and a secondary adjusting disk;

[0019] The damping assembly and the auxiliary adjustment disk are sequentially installed inside the fixed pipe;

[0020] The auxiliary adjusting plate blocks the fixed pipe, and a plurality of auxiliary holes are evenly opened on the auxiliary adjusting plate along the circumference;

[0021] The damping assembly includes a fixed rod, a thermosensitive metal spiral rod, a connecting shaft and a main adjustment disk;

[0022] The main adjusting disk abuts against the auxiliary adjusting disk and blocks the fixed pipe, and a plurality of main holes are evenly opened on the main adjusting disk along the circumference;

[0023] The number of the auxiliary holes matches and corresponds to the number of the main holes;

[0024] One end of the main adjusting disk away from the auxiliary adjusting disk is connected to the connecting shaft, one end of the connecting shaft away from the main adjusting disk is connected to the thermosensitive metal spiral rod, one end of the thermosensitive metal spiral rod away from the connecting shaft is connected to the fixing rod, and both ends of the fixing rod are connected to the inner wall of the fixing pipe fitting.

[0025] Furthermore, two groups of hydraulic cylinder exhaust ports are provided on the side wall of the hydraulic cylinder body;

[0026] The two groups of hydraulic cylinder exhaust ports correspond to the positions of the upper chamber and the lower chamber respectively.

[0027] Furthermore, an oil filling port and an oil drain port are provided on the side wall of the hydraulic cylinder body;

[0028] The oil filling port and the oil discharge port correspond to positions of the upper chamber and the lower chamber, respectively.

[0029] Furthermore, a cavity exhaust hole is provided on the side wall of the hydraulic cylinder body;

[0030] The cavity exhaust hole corresponds to the position of the air cavity.

[0031] Furthermore, the top end of the piston rod is connected with an upper pin head, and the upper pin head is hinged with an upper pin seat through a pin shaft;

[0032] The bottom end of the hydraulic cylinder body is connected with a lower pin head, and the lower pin head is hinged with a lower pin seat through a pin shaft.

[0033] Furthermore, an oil hole is provided on the piston.

[0034] Furthermore, the connection between the piston rod and the hydraulic cylinder body is slidably sealed by a sealing ring;

[0035] The piston and the hydraulic cylinder body are slidably sealed via a sealing ring.

[0036] Furthermore, the connecting component comprises a connecting conduit, and the two groups of the self-adjusting damping mechanisms are connected to each other through the connecting conduit.

[0037] It can be seen from the above technical solution that, compared with the prior art, the beneficial effects of the present invention are:

[0038] 1. Adapt to large temperature differences: The self-adjusting damping mechanism can automatically adjust the flow rate of the hydraulic oil according to temperature changes, so that the damper can maintain a stable damping effect within a large temperature difference range, overcoming the problem that the traditional liquid viscous damper is affected by temperature and causes unstable seismic isolation performance.

[0039] 2. Improve the seismic isolation effect: The device can effectively suppress the swaying of the structure, and cooperate with the self-adjusting damping mechanism to further dissipate the seismic energy, improve the seismic isolation effect, and enhance the seismic resistance of the building structure.

[0040] 3. No need for manual adjustment: The self-adjusting damping mechanism can automatically adapt to changes in external ambient temperature and make automatic adjustments, without the need for manual adjustment, saving resources and reducing maintenance costs.

[0041] 4. Simple structure and easy production: The principle and structure of this damper are simple, easy to process and produce, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0043] Figure 1 A schematic diagram of the structure of a self-adjusting damper in an embodiment of the present invention;

[0044] Figure 2 It is a structural schematic diagram of a self-adjusting damping mechanism in an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of a process of adjusting flow rate of a self-adjusting damping mechanism in an embodiment of the present invention;

[0046] Figure 4 Schematic diagram of the hydraulic oil flow process inside the self-adjusting damper in an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1. Upper pin seat; 2. Lower pin seat; 3. Pin shaft; 4. Upper pin head; 5. Lower pin head; 6. Piston rod; 7. Piston; 8. Hydraulic cylinder body; 9. Hydraulic chamber; 10. Air chamber; 11. Hydraulic cylinder exhaust port; 12. Oil filling port; 13. Cavity exhaust hole; 14. Upper oil outlet; 15. Lower oil outlet; 16. Damping assembly; 17. Auxiliary adjustment disk; 18. Connecting guide tube; 19. Oil drain port; 20. Main adjustment disk; 21. Connecting shaft; 22. Thermosensitive metal spiral rod; 23. Fixed rod. DETAILED DESCRIPTION

[0049] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0054] Embodiment 1

[0055] See also Figure 1 As shown, a self-adjusting damper based on temperature change provided in this embodiment includes a hydraulic system, two sets of self-adjusting damping mechanisms and connecting components;

[0056] The hydraulic system includes a hydraulic cylinder 8, a piston rod 6 and a piston 7;

[0057] The inner cavity of the hydraulic cylinder body 8 is divided into two upper and lower independent hydraulic chambers 9 and an air chamber 10;

[0058] The bottom end of the piston rod 6 vertically penetrates into the hydraulic cylinder body 8 from the top of the hydraulic cylinder body 8 and is located inside the air chamber 10;

[0059] The top end of the piston rod 6 leaks out of the hydraulic cylinder body 8;

[0060] A piston 7 is sleeved on the rod body in the pressure chamber. Specifically, the piston rod 6 and the piston 7 are connected in an integrated manner or threadedly. The piston 7 divides the hydraulic chamber 9 into an upper chamber and a lower chamber.

[0061] The upper chamber and the lower chamber are filled with hydraulic oil;

[0062] An upper oil outlet 14 and a lower oil outlet 15 are provided on the side wall of the hydraulic cylinder body 8, and the upper oil outlet 14 and the lower oil outlet 15 correspond to the positions of the upper cavity and the lower cavity respectively;

[0063] The upper oil outlet 14 is provided with a set of self-adjusting damping mechanisms, and the lower oil outlet 15 is provided with another set of self-adjusting damping mechanisms;

[0064] The two sets of self-adjusting damping mechanisms are connected to each other through a connecting component;

[0065] The self-adjusting damping mechanism is used to automatically increase the flow rate when the temperature decreases, or to automatically decrease the flow rate when the temperature increases.

[0066] It should be noted that two groups of hydraulic cylinder exhaust ports 11 are provided on the side wall of the hydraulic cylinder body 8;

[0067] The two groups of hydraulic cylinder exhaust ports 11 correspond to the positions of the upper chamber and the lower chamber respectively.

[0068] It should be noted that an oil filling port 12 and an oil discharge port 19 are provided on the side wall of the hydraulic cylinder body 8;

[0069] The oil filling port 12 and the oil discharge port 19 correspond to the positions of the upper chamber and the lower chamber, respectively.

[0070] It should be noted that a cavity exhaust hole 13 is provided on the side wall of the hydraulic cylinder body 8;

[0071] The cavity exhaust hole 13 corresponds to the position of the air cavity 10 .

[0072] It should be noted that the top end of the piston rod 6 is connected with an upper pin head 4. Specifically, the upper pin head 4 is connected to the piston rod 6 by welding, and the upper pin head 4 is hinged with an upper pin seat 1 through a pin shaft 3.

[0073] The bottom end of the hydraulic cylinder body 8 is connected with a lower pin head 5 , and the lower pin head 5 is hinged with a lower pin seat 2 through a pin shaft 3 .

[0074] It should be noted that an oil hole is provided on the piston 7, and the upper cavity and the lower cavity are connected through the oil hole.

[0075] It should be noted that the connection between the piston rod 6 and the hydraulic cylinder body 8 is slidably sealed by a sealing ring;

[0076] The piston 7 and the hydraulic cylinder body 8 are slidingly sealed by a sealing ring.

[0077] It should be noted that the connecting component includes a connecting conduit 18, and the two sets of self-adjusting damping mechanisms are interconnected through the connecting conduit 18. Specifically, the connecting conduit 18 can be a rubber hose or a steel pipe, and the connecting conduit 18 is connected to the upper oil outlet 14 and the lower oil outlet 15 by threads.

[0078] Specifically, under normal use, the upper pin seat 1, the pin shaft 3, the upper pin head 4, the piston rod 6 and the piston 7 move upward or downward together. During the movement, it is necessary to ensure that the hydraulic oil always fills the upper chamber and the lower chamber. The hydraulic oil in the two chambers is circulated and transmitted through the self-adjusting damping mechanism and the connecting conduit 18 during the movement. When the piston rod 6 touches the bottom of the hydraulic cylinder body 8 (the bottom wall of the air chamber 10), the piston 7 moves to the extreme position.

[0079] The seismic isolation device is placed at the bottom of industrial and civil buildings, bridges, equipment, nuclear power facilities and other structures that can withstand earthquakes or other dynamic effects or at the bottom of seismic isolation supports. It can achieve a relatively stable anti-sway and shock-absorbing effect under conditions of large temperature differences in the working environment.

[0080] Embodiment 2

[0081] The difference between this embodiment and the first embodiment is that this embodiment provides the specific structure of the self-adjusting damping mechanism of the first embodiment, see Figure 2 As shown, the self-adjusting damping mechanism adopts the following structural arrangement:

[0082] The self-adjusting damping mechanism includes a fixed pipe, a damping assembly 16 and an auxiliary adjustment disk 17;

[0083] The damping assembly 16 and the auxiliary adjustment disk 17 are sequentially installed inside the fixed pipe;

[0084] The auxiliary adjusting plate 17 blocks and fixes the pipe fittings, and a plurality of auxiliary holes are evenly opened along the circumference of the auxiliary adjusting plate 17;

[0085] The damping assembly 16 includes a fixing rod 23, a thermosensitive metal spiral rod 22, a connecting shaft 21 and a main adjustment disk 20;

[0086] The main adjusting disk 20 abuts against the auxiliary adjusting disk 17 and blocks the fixed pipe fittings. A plurality of main holes are evenly opened along the circumference of the main adjusting disk 20.

[0087] The number of the secondary holes matches the number of the primary holes and corresponds to each other;

[0088] One end of the main adjusting disk 20 away from the auxiliary adjusting disk 17 is connected to the connecting shaft 21, and one end of the connecting shaft 21 away from the main adjusting disk 20 is connected to the thermosensitive metal spiral rod 22. One end of the thermosensitive metal spiral rod 22 away from the connecting shaft 21 is connected to the fixing rod 23, and both ends of the fixing rod 23 are connected to the inner wall of the fixed pipe fitting.

[0089] Specifically, the self-adjusting damping mechanism can be installed on the connecting conduit 18 through a threaded connection, or installed on the upper oil outlet 14 and the lower oil outlet 15. The thermosensitive metal screw rod 22 is connected to the fixed rod 23 and the connecting shaft 21 by welding. According to the principle of thermal expansion and contraction, the thermosensitive metal screw rod 22 rotates according to the temperature change of the working environment of the damper, and then adjusts the flow aperture of the hole between the main adjusting disk 20 and the auxiliary adjusting disk 17 to cope with the different viscosities of the hydraulic oil (i.e., the damping fluid) at different temperatures, adapt to temperature changes and achieve the purpose of maintaining the constant damping of the damper.

[0090] When the temperature drops, the viscosity of the hydraulic oil (damping fluid) increases, and the thermosensitive metal screw rod 22 with a large temperature expansion coefficient shrinks and rotates, driving the connecting shaft 21 and the main adjustment disk 20 to rotate so that the main hole on the main adjustment disk 20 coincides with the secondary hole on the secondary adjustment disk 17, increasing the flow aperture, providing a larger flow pore for the hydraulic oil (damping fluid) with increased viscosity, and dissipating the seismic energy; refer to Figure 3 When the temperature rises, the viscosity of the hydraulic oil (damping fluid) decreases, and the thermistor metal spiral rod 22 with a larger temperature expansion coefficient expands and rotates in the opposite direction of the contraction, driving the connecting shaft 21 and the main adjusting disk 20 to rotate, causing the main hole of the main adjusting disk 20 and the secondary hole of the secondary adjusting disk 17 to be partially misaligned, reducing the flow aperture, providing a smaller flow pore for the hydraulic oil (damping fluid) with reduced viscosity, offsetting the loss of anti-seismic ability caused by the reduced friction resistance due to the reduced viscosity of the hydraulic oil (damping fluid) caused by the increase in temperature.

[0091] Embodiment 3

[0092] This embodiment provides the specific working process of the second embodiment:

[0093] The device maintains constant damping under a large temperature difference (30~40℃ temperature difference). In normal use, the hydraulic cylinder exhaust port 11, oil filling port 12, and oil discharge port 19 are all in a closed state; when the main structure is affected by an earthquake, the device moves, taking the downward movement as an example. Figure 4 As shown, the upper pin seat 1, the pin shaft 3, the upper pin head 4 together with the piston rod 6 and the piston 7 move downward at the same time, and the hydraulic oil in the lower chamber flows out from the lower oil outlet 15, flows from bottom to top through the self-adjusting damping mechanism, the connecting conduit 18, and the self-adjusting damping mechanism, and enters the upper chamber through the upper oil outlet 14. When the hydraulic oil flows through the self-adjusting damping mechanism, a damping force is generated, which consumes part of the seismic force.

[0094] The hydraulic oil enters the upper chamber through the upper oil outlet 14. Since the hydraulic cylinder exhaust port 11, the oil filling port 12 and the exhaust port are all closed, the piston 7 will move downward due to the increase in the pressure in the upper chamber, further consuming part of the seismic force; at the same time, the viscous damping fluid will flow from the upper chamber to the lower chamber through the oil hole on the piston 7, further consuming the seismic force.

[0095] When the temperature changes, the thermistor metal spiral rod 22 with a larger expansion coefficient expands and contracts due to heat and rotates, driving the connecting shaft 21 to rotate, and then driving the main adjustment disk 20 to rotate, so that the main hole on the main adjustment disk 20 and the auxiliary hole on the auxiliary adjustment disk 17 overlap or misalign, so that the pores through which the damping fluid passes change with the temperature. When the temperature is low and the viscosity of the damping fluid increases, the pores through which the damping fluid passes become larger. When the temperature is high and the viscosity of the damping fluid decreases, the pores through which the damping fluid passes decrease, so as to realize the function of the damping being able to self-regulate according to the temperature.

[0096] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A self-adjusting damper based on temperature change, characterized in that: It includes a hydraulic system, two sets of self-adjusting damping mechanisms and connecting parts; The hydraulic system comprises a hydraulic cylinder, a piston rod and a piston; The inner cavity of the hydraulic cylinder body is divided into two upper and lower independent hydraulic cavities and an air cavity; The bottom end of the piston rod vertically penetrates into the hydraulic cylinder body from the top of the hydraulic cylinder body and is located inside the air chamber; The top end of the piston rod leaks out of the hydraulic cylinder body; The piston rod is located in the hydraulic chamber and the piston is sleeved on the rod body, and the piston divides the hydraulic chamber into an upper chamber and a lower chamber; The upper chamber and the lower chamber are filled with hydraulic oil; An upper oil outlet and a lower oil outlet are provided on the side wall of the hydraulic cylinder body, and the upper oil outlet and the lower oil outlet correspond to the positions of the upper cavity and the lower cavity respectively; The upper oil outlet is provided with one set of the self-adjusting damping mechanisms, and the lower oil outlet is provided with another set of the self-adjusting damping mechanisms; The two groups of the self-adjusting damping mechanisms are connected to each other through the connecting component; The self-adjusting damping mechanism is used to automatically increase the flow rate when the temperature decreases, or to automatically reduce the flow rate when the temperature increases; The self-adjusting damping mechanism comprises a fixed pipe, a damping assembly and an auxiliary adjusting disk; The damping assembly and the auxiliary adjustment disk are sequentially installed inside the fixed pipe; The auxiliary adjusting plate blocks the fixed pipe, and a plurality of auxiliary holes are evenly opened on the auxiliary adjusting plate along the circumference; The damping assembly includes a fixed rod, a thermosensitive metal spiral rod, a connecting shaft and a main adjustment disk; The main adjusting disk abuts against the auxiliary adjusting disk and blocks the fixed pipe, and a plurality of main holes are evenly opened on the main adjusting disk along the circumference; The number of the auxiliary holes matches and corresponds to the number of the main holes; One end of the main adjusting disk away from the auxiliary adjusting disk is connected to the connecting shaft, one end of the connecting shaft away from the main adjusting disk is connected to the thermosensitive metal spiral rod, one end of the thermosensitive metal spiral rod away from the connecting shaft is connected to the fixing rod, and both ends of the fixing rod are connected to the inner wall of the fixing pipe fitting.

2. A self-adjusting damper based on temperature change according to claim 1, characterized in that: Two groups of hydraulic cylinder exhaust ports are provided on the side wall of the hydraulic cylinder body; The two groups of hydraulic cylinder exhaust ports correspond to the positions of the upper chamber and the lower chamber respectively.

3. A self-adjusting damper based on temperature change according to claim 1, characterized in that: An oil filling port and an oil drain port are provided on the side wall of the hydraulic cylinder body; The oil filling port and the oil discharge port correspond to positions of the upper chamber and the lower chamber, respectively.

4. A temperature-variable self-adjusting damper according to claim 1, characterized in that: The side wall of the hydraulic cylinder body is provided with a cavity exhaust hole; The cavity exhaust hole corresponds to the position of the air cavity.

5. A self-adjusting damper based on temperature change according to claim 1, characterized in that: The top end of the piston rod is connected with an upper pin head, and the upper pin head is hinged with an upper pin seat through a pin shaft; The bottom end of the hydraulic cylinder body is connected with a lower pin head, and the lower pin head is hinged with a lower pin seat through a pin shaft.

6. A self-adjusting damper based on temperature change according to claim 1, characterized in that: An oil hole is provided on the piston.

7. A temperature-variable self-adjusting damper according to claim 1, characterized in that: The connection between the piston rod and the hydraulic cylinder body is slidably sealed by a sealing ring; The piston and the hydraulic cylinder body are slidably sealed via a sealing ring.

8. A temperature-variable self-adjusting damper according to claim 1, characterized in that: The connecting component comprises a connecting conduit, and the two groups of the self-adjusting damping mechanisms are connected to each other through the connecting conduit.

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