Graded adjustment type viscous damper

Abstract

The utility model provides a graded adjustment type viscous damper, and relates to the technical field of dampers. Comprising a piston, a piston rod and a piston cylinder, damping media are arranged in the piston cylinder, the piston is arranged on the piston rod, the piston rod is movably arranged in the axis direction of the piston cylinder and penetrates through the piston cylinder, and at least one hollow guide rod is arranged in the axis direction of the piston cylinder and penetrates through the piston; a plurality of through holes are formed in the guide rod at intervals in the axial direction of the guide rod, sealing pieces used for sealing the through holes are movably arranged in the guide rod, the guide rod is provided with driving equipment used for driving the sealing pieces to move, and through holes are formed in the two ends of the piston. According to the utility model, graded adjustment can be realized according to the earthquake intensity, so that the anti-seismic effect is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of dampers, and in particular to a graded adjustable viscous damper. Background Art

[0002] As a commonly used energy-absorbing component, viscous dampers are widely used in energy dissipation and shock absorption projects. Common viscous dampers are mainly composed of pistons, piston rods, cylinders and seals. The piston divides the inner part of the cylinder into two chambers, and the two chambers are filled with viscous damping liquid as the damping medium. There are small holes on the piston or a gap between the piston and the cylinder to allow the damping medium to pass through; when the piston and the cylinder produce relative motion, the piston will squeeze the damping medium in the chamber on one side of its motion direction, and the squeezed damping medium will flow to the other side chamber through the small holes on the piston or the gap between the piston and the cylinder. The damping medium converts the mechanical energy transmitted from the structure into heat energy and dissipates it during high-speed flow, thereby playing a role in shock absorption, buffering and energy consumption.

[0003] The utility model patent with the authorization announcement number CN216691983U disclosed in the Chinese patent literature discloses a "viscous damper", and specifically discloses a piston, a piston rod, a cylindrical cylinder, a front sealing sleeve and a rear sealing sleeve, the front sealing sleeve is arranged at the barrel mouth of the cylindrical cylinder, the rear sealing sleeve is arranged in the cylindrical cylinder, the piston rod passes through the front sealing sleeve and the rear sealing sleeve in sequence and is inserted into the cylindrical cylinder, the piston is arranged on the rod body of the piston rod between the front sealing sleeve and the rear sealing sleeve, the sealing cavity between the front sealing sleeve and the rear sealing sleeve is divided into two chambers, the two chambers are filled with damping medium, and also includes a guide tube, the guide tube passes through the piston and is slidably sealed with the piston, the two ends of the guide tube are respectively fixed to the front sealing sleeve and the rear sealing sleeve, and a plurality of guide holes are spaced apart on the guide tube. The scheme provided by the embodiment of the utility model is that as the piston moves, the damping force will gradually increase due to the decrease in the number of guide holes into which the damping medium flows, so that the damping effect is variable; the size and number of the guide holes can also be adjusted to achieve controllable damping effect.

[0004] However, the prior art disclosed in the patent only realizes variable damping effect, but cannot realize automatic graded adjustment of the intensity of the damping effect of the viscous damper according to the energy level of the earthquake. Utility Model Content

[0005] The main purpose of the present application is to provide a graded adjustable viscous damper, which can be graded and adjusted according to the intensity of the earthquake, thereby improving the earthquake resistance and extending its service life.

[0006] In order to solve the above technical problems, the present application provides a step-by-step adjustable viscous damper, including a piston, a piston rod and a piston cylinder, wherein a damping medium is arranged in the piston cylinder, the piston is arranged on the piston rod, the piston rod is movably arranged along the axis direction of the piston cylinder and penetrates the piston cylinder, and the piston cylinder is provided with at least one hollow guide rod along the axis direction thereof, and the guide rod penetrates the piston;

[0007] The guide rod is provided with a plurality of through holes at intervals along its axial direction, a sealing member for sealing the through holes is movably provided in the guide rod, a driving device for driving the sealing member to move is provided in the guide rod, and through holes are provided at both ends of the piston.

[0008] Optionally, in some embodiments of the present invention, the above also includes a vibration sensor and a processing module, and the vibration sensor and the driving device are both electrically connected to the processing module.

[0009] Optionally, in some embodiments of the present invention, the plurality of through holes are divided into two groups, the number of through holes in any one group is at least two, and the two groups of through holes are respectively arranged at both ends of the guide rod at intervals.

[0010] Optionally, in some embodiments of the present invention, the number of the above-mentioned sealing members is two, both of which are connected to the driving device, and the two sealing members are respectively located on the same side of the two groups of through holes.

[0011] Optionally, in some embodiments of the present invention, the sealing member is a hollow cylindrical structure, and the outer wall of the sealing member is in contact with the inner wall of the guide rod.

[0012] Optionally, in some embodiments of the present invention, a sealing sleeve is provided on the outside of the sealing member.

[0013] Optionally, in some embodiments of the present invention, the driving device comprises a telescopic rod, which is mounted outside the piston rod, a telescopic end of the telescopic rod passes through the piston cylinder and extends into the guide rod, and the telescopic rod is connected to the sealing member.

[0014] Optionally, in some embodiments of the present invention, a baffle is provided at one end of the guide rod close to the telescopic rod, and the telescopic rod passes through the baffle.

[0015] Optionally, in some embodiments of the present invention, the baffle is provided with a second sealing block for sealing a gap between the baffle and the telescopic rod.

[0016] Optionally, in some embodiments of the present invention, the piston cylinder is provided with two first sealing blocks for sealing the gap between the piston rod and the piston cylinder.

[0017] The beneficial effects that can be achieved by this application.

[0018] A graded adjustable viscous damper proposed in an embodiment of the present application, based on the aforementioned technical features, can achieve sealing of different numbers of through holes by driving the seal to move on the guide rod through a driving device, thereby achieving control of the number of through holes connecting the inside of the guide rod and the inside of the piston cylinder, and achieving electric graded adjustment of the damping effect of the viscous damper, thereby overcoming the problem in the prior art that the number of through holes can only be controlled by replacing the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A cross-sectional view of a graded adjustable viscous damper provided by an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0021] Icon: 1-piston, 2-piston rod, 3-piston cylinder, 4-damping medium, 5-guide rod, 6-through hole, 7-seal, 8-driving device, 9-sealing sleeve, 10-baffle, 11-first sealing block, 12-second sealing block,

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0028] In order to achieve the above objectives,

[0029] Reference Figure 1 The embodiment of the present application provides a step-by-step adjustable viscous damper, comprising a piston 1, a piston rod and a piston cylinder, wherein a damping medium 4 is arranged in the piston cylinder, the piston 1 is arranged on the piston rod, the piston rod is movably arranged along the axial direction of the piston cylinder and penetrates the piston cylinder, and the piston cylinder is provided with at least one hollow guide rod 5 along its axial direction, and the guide rod 5 penetrates the piston 1; the guide rod 5 is provided with a plurality of through holes 6 at intervals along its axial direction;

[0030] The piston rod of this embodiment is a cylindrical structure with a hollow interior. The piston rod tube penetrates the piston cylinder along the axial direction of the piston cylinder, and the piston rod can reciprocate relative to the piston cylinder. The part of the piston rod located in the piston cylinder is fixedly provided with a piston 1 of a cylindrical structure. The piston 1 is coaxially arranged with the piston rod. At the same time, the outer wall of the piston 1 is tightly fitted with the inner wall of the piston cylinder. The piston 1 divides the inner part of the cylinder into two chambers. The two chambers are filled with viscous damping liquid as a damping medium 4.

[0031] A guide rod 5 is provided in the piston cylinder and is arranged parallel to the axial direction of the piston cylinder. The guide rod 5 is hollow inside and is provided with a plurality of through holes 6. Through holes 6 are provided on both sides of the piston 1 and form channels with the space inside the guide rod 5, so that when the piston 1 is moved, the damping medium 4 on both sides of the piston 1 can flow through the channels in the guide rod 5; the piston 1 is provided with the same number of guide holes as the guide rod 5, and the guide rod 5 penetrates the guide holes, and when the piston rod is driven to move relative to the piston cylinder, the piston 1 is driven to slide relative to the inner wall of the piston cylinder;

[0032] Specifically, when the piston 1 and the piston cylinder are relatively displaced, the piston 1 squeezes the damping medium 4 in one side chamber, and the damping medium 4 in the side chamber flows into the inside of the guide tube through the through hole 6 under the action of pressure, and then flows along the guide rod 5 through the through hole 6 in the other side chamber to enter the other side chamber. The damping medium 4 generates a pore contraction effect when flowing into and out of the through hole 6, and a viscous friction effect when flowing in the guide tube, thereby converting kinetic energy into heat energy and dissipating it;

[0033] Moreover, as the piston 1 moves, the number of through holes 6 through which the damping medium 4 flows gradually decreases, that is, the cross-sectional area through which the damping medium 4 flows decreases. When the external force remains unchanged, the damping force will gradually increase as the number of through holes 6 through which the damping medium 4 flows decreases, thereby achieving variable damping effect. At the same time, the size and number of through holes 6 can also be adjusted according to the damping force required for shock absorption to achieve controllable damping effect.

[0034] The number of the guide rod 5 is at least one. When there are multiple guide rods 5, they are evenly spaced along the circumference of the piston rod.

[0035] The guide rod 5 is movably provided with a sealing member 7 for sealing the through hole 6, the guide rod 5 is provided with a driving device 8 for driving the sealing member 7 to move, and both ends of the piston rod are provided with through holes 6.

[0036] The seal 7 can be driven to move on the guide rod 5 by the driving device 8 to achieve sealing of different numbers of through holes 6, thereby controlling the number of through holes 6 connecting the inside of the guide rod 5 and the inside of the piston cylinder, and realizing electric graded adjustment of the damping effect of the viscous damper, avoiding the replacement of the guide rod 5 to control the number of through holes 6 in the prior art.

[0037] As an optional implementation, this embodiment further includes a vibration sensor and a processing module, and the vibration sensor and the driving device 8 are both electrically connected to the processing module.

[0038] The vibration intensity around the graded adjustable viscous damper of the present application can be detected by a vibration sensor, and the parameters generated according to the vibration intensity can be transmitted to the processing module, and the drive device 8 can be controlled by the existing technology preset in the processing module.

[0039] The processing module of this embodiment can use AT89S51 chip. AT89S51 is a low-power, high-performance CMOS 8-bit processor, which integrates a general 8-bit central processing unit and an ISP Flash storage unit, and can process the received information in a timely and effective manner.

[0040] It should be noted that the processing module can be an integrated circuit chip with signal processing capabilities. The processing module can be a general-purpose processor, including a central processing unit, a network processor, etc.; it can also be a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. It is not limited to the AT89S51 chip in this embodiment.

[0041] As an optional implementation, the plurality of through holes 6 in this embodiment are divided into two groups, and the two groups of through holes 6 are respectively arranged at two ends of the guide rod 5 at intervals.

[0042] This ensures that there are through holes 6 on both sides of the piston 1, so that the chambers on both sides of the piston 1 can communicate;

[0043] Furthermore, a stopper for limiting the movement of the piston 1 may be provided in the direction of the two groups of through holes 6 close to the piston 1 to prevent the piston 1 from sealing the through holes 6 on one side.

[0044] The number of any group of through holes 6 is at least two, so as to adjust the damping effect of the graded adjustable viscous damper of the present application.

[0045] As an optional implementation, the number of the sealing members 7 in this embodiment is two, both of which are connected to the telescopic rod, and the two sealing members 7 are respectively located on the same side of the two groups of through holes 6 .

[0046] The sealing member 7 is a hollow cylindrical structure, and the outer wall of the sealing member 7 is in contact with the inner wall of the guide rod 5 .

[0047] A sealing sleeve 9 is arranged on the outer side of the sealing member 7 .

[0048] In this embodiment, there are two sealing members 7 in the shape of a hollow cylindrical structure. The two sealing members 7 are respectively arranged on one side of the two groups of through holes 6 , and the two sealing members 7 can be driven by a driving device 8 to move relative to the two groups of through holes 6 .

[0049] It should be noted that in this embodiment, two seals 7 are arranged on the same side of the two groups of through holes 6 respectively, based on using one driving device 8 to simultaneously drive the two sealing sleeves 9 to move. If multiple driving devices 8 are used, the direction of the seal 7 relative to the through hole 6 can be set according to actual conditions.

[0050] By providing a sealing sleeve 9 on the outside of the sealing member 7, the sealing effect between the sealing member 7 and the inner wall of the guide tube can be enhanced.

[0051] As an optional implementation, the driving device 8 of this embodiment includes a telescopic rod, which is installed outside the piston rod. The telescopic end of the telescopic rod passes through the piston cylinder and extends into the guide rod 5. The telescopic rod is connected to the sealing member 7.

[0052] A baffle plate 10 is provided inside the guide rod 5 at one end close to the telescopic rod, and the telescopic rod passes through the baffle plate 10 .

[0053] The baffle plate 10 is provided with a second sealing block 12 for sealing the gap between the baffle plate 10 and the telescopic rod.

[0054] The driving device 8 of this embodiment is a telescopic rod, which drives the sealing member 7 to reciprocate by extending and retracting the telescopic rod. The baffle 10 isolates part of the telescopic rod from the damping medium 4, so that only the telescopic end of the telescopic rod is in contact with the damping medium 4, thereby preventing the damping medium 4 from penetrating into the interior of the telescopic rod through the gap of the telescopic rod and reducing the service life of the telescopic rod.

[0055] Furthermore, by arranging a second sealing block 12 at the position where the telescopic rod passes through the baffle 10, the sealing effect of the baffle 10 on the telescopic rod is further enhanced.

[0056] At the same time, two first sealing blocks 11 are arranged through the piston cylinder to seal the gap between the piston rod and the piston cylinder to prevent the damping medium 4 from leaking.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments and that the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application.

Claims

1. A step-by-step adjustable viscous damper, comprising a piston, a piston rod and a piston cylinder, wherein a damping medium is arranged in the piston cylinder, the piston is arranged on the piston rod, and the piston rod is movably arranged along the axis direction of the piston cylinder and penetrates the piston cylinder, Features: The piston cylinder is provided with at least one hollow guide rod along its axial direction, and the guide rod passes through the piston; The guide rod is provided with a plurality of through holes at intervals along its axial direction, a sealing member for sealing the through holes is movably provided inside the guide rod, the guide rod is provided with a driving device for driving the sealing member to move, and through holes are provided at both ends of the piston.

2. The step-by-step adjustable viscous damper according to claim 1 is characterized in that: It also includes a vibration sensor and a processing module, wherein the vibration sensor and the driving device are both electrically connected to the processing module.

3. The step-by-step adjustable viscous damper according to claim 1 is characterized in that: The plurality of through holes are divided into two groups, the number of through holes in any one group is at least two, and the two groups of through holes are respectively arranged at two ends of the guide rod at intervals.

4. The step-by-step adjustable viscous damper according to claim 1 is characterized in that: There are two sealing members, both of which are connected to the driving device, and the two sealing members are respectively located on the same side of the two groups of through holes.

5. The step-by-step adjustable viscous damper according to claim 1 is characterized in that: The sealing member is a hollow cylindrical structure, and the outer side wall of the sealing member is in contact with the inner side wall of the guide rod.

6. The step-by-step adjustable viscous damper according to claim 1, characterized in that: A sealing sleeve is arranged on the outer side of the sealing member.

7. The step-by-step adjustable viscous damper according to claim 1 is characterized in that: The driving device comprises a telescopic rod, the telescopic rod is installed outside the piston rod, the telescopic end of the telescopic rod penetrates the piston cylinder and extends into the guide rod, and the telescopic rod is connected to the sealing member.

8. The step-by-step adjustable viscous damper according to claim 7, characterized in that: A baffle is provided in the guide rod at one end close to the telescopic rod, and the telescopic rod passes through the baffle.

9. The step-by-step adjustable viscous damper according to claim 8, characterized in that: The baffle is provided with a second sealing block for sealing the gap between the baffle and the telescopic rod.

10. The step-by-step adjustable viscous damper according to claim 1, characterized in that: The piston cylinder is provided with two first sealing blocks for sealing the gap between the piston rod and the piston cylinder.

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