Damping force adjustable three-dimensional viscous damper

Abstract

The utility model discloses a damping force adjustable three-dimensional viscous damper which comprises a top barrel and a damping force adjusting device arranged on the top barrel. A plurality of fixed blades are arranged on the top barrel from top to bottom; the damping force adjusting device comprises a blade main shaft, a worm gear, an adjusting worm and a plurality of adjustable blades, and the worm gear is arranged on the blade main shaft and meshed with the adjusting worm; the adjustable blades are sequentially arranged on the blade main shaft from top to bottom, and the adjustable blades and the fixed blades are alternately arranged in the vertical direction. The blade main shaft is driven to rotate by rotating the adjusting worm, and then the overlapping degree of the fixed blade and the adjustable blade is adjusted, so that stepless adjustment of the damping force of the viscous damper is achieved, and the stepless adjusting device has the advantages of being high in precision and simple in adjusting mode.

Description

Technical Field

[0001] The utility model relates to the technical field of viscous dampers, in particular to a three-dimensional viscous damper with adjustable damping force. Background Art

[0002] Viscous dampers are made based on the principle of fluid movement, especially the throttling resistance generated when the fluid passes through a throttling hole. They are widely used in high-rise buildings, bridges, seismic retrofitting of building structures, vibration resistance of industrial pipeline equipment, military industry and other fields.

[0003] At present, the main components of the viscous damper include a cylinder, a piston, a viscous fluid and a guide rod. When the vibration system is stimulated by external factors, the viscous fluid in the damper will undergo shear deformation and absorb the vibration energy, thereby reducing the amplitude and energy of the system. For vibration systems with different vibration energies, different types of viscous dampers need to be configured to provide damping forces that are suitable for the system. In order to reduce the investment cost of various types of dampers, technicians in this field have proposed viscous dampers with adjustable damping forces. However, most of the adjustable dampers currently can only be adjusted with a certain degree of precision, and the damper needs to be disassembled for adjustment, which is cumbersome. Summary of the invention

[0004] To solve the above technical problems, the utility model provides a three-dimensional viscous damper with adjustable damping force. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] The utility model adopts the following technical solutions:

[0006] A damping force adjustable three-dimensional viscous damper is provided, comprising: a top cylinder and a damping force adjusting device arranged on the top cylinder; the top cylinder is provided with a plurality of fixed blades from top to bottom; the damping force adjusting device comprises: a blade main shaft, a worm gear, an adjusting worm and a plurality of adjustable blades, the worm gear is arranged on the blade main shaft and meshes with the adjusting worm; each of the adjustable blades is arranged on the blade main shaft in sequence from top to bottom, and is alternately arranged with each of the fixed blades in the vertical direction.

[0007] Furthermore, the top cylinder is a cylindrical structure with a hollow interior, and a notch is provided in the top cylinder to form an arc-shaped support plate, and a plurality of fixed blades are arranged on the inner side of the arc-shaped support plate from top to bottom, and a certain distance is spaced between two adjacent fixed blades to form a built-in space for accommodating the adjustable blades.

[0008] Furthermore, the fixed blade and the adjustable blade are both semicircular, and a semicircular clearance groove is opened at the center of the fixed blade; the blade main shaft is a cylindrical structure, and the axis of the blade main shaft, the center of the fixed blade and the center of the adjustable blade are all located on the axis of the top cylinder.

[0009] Furthermore, an end cover is arranged on the top of the top cylinder, a partition plate is arranged inside the top cylinder, and stepped grooves are formed on the end cover and the partition plate; a first bearing installed in the stepped groove is arranged on the blade main shaft.

[0010] Furthermore, two outer tubes connected to the interior of the top tube are arranged on the top tube, and two ends of the adjusting worm are installed in the outer tubes through second bearings and extend from the tube mouth of the outer tube.

[0011] Furthermore, a force adjustment block is provided on the end surface of one end of the adjusting worm.

[0012] Furthermore, through holes are provided on both the fixed blade and the adjustable blade.

[0013] Furthermore, the three-dimensional viscous damper with adjustable damping force also includes: a bottom cylinder for containing damping fluid, and the bottom cylinder is a cylindrical structure with an open top, and the bottom end of the top cylinder extends from the top opening of the bottom cylinder into the interior of the bottom cylinder.

[0014] Furthermore, the three-dimensional viscous damper with adjustable damping force also includes: an upper mounting plate and a lower mounting plate; the upper mounting plate is arranged at the top of the top cylinder, and the lower mounting plate is arranged at the bottom of the bottom cylinder.

[0015] The beneficial effects brought about by the utility model are as follows: the utility model drives the blade main shaft to rotate by rotating the adjusting worm, and then adjusts the overlapping degree of the fixed blade and the adjustable blade, thereby realizing stepless adjustment of the damping force of the viscous damper, which has the advantages of high precision and simple adjustment method. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a three-dimensional viscous damper with adjustable damping force according to the utility model;

[0018] Figure 2 It is a structural schematic diagram of the top cylinder and the damping force adjustment device of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the damping force adjustment device of the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the top cylinder of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the top cylinder of the utility model;

[0022] Figure 6 yes Figure 5 AA view;

[0023] Figure 7 It is the installation diagram of the adjusting worm. DETAILED DESCRIPTION

[0024] The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings. It should be clear that 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.

[0025] like Figure 1-7 As shown, in some illustrative embodiments, a damping force adjustable three-dimensional viscous damper is provided, comprising: a top cylinder 1, a damping force adjustment device 2, a bottom cylinder 3, an upper mounting plate 4 and a lower mounting plate 5.

[0026] The bottom cylinder 3 contains damping fluid 6, and the bottom cylinder 3 is a cylindrical structure with an opening at the top, and the bottom end of the top cylinder 1 extends from the top opening of the bottom cylinder 3 into the inside of the bottom cylinder 3. When the top cylinder 1 and the bottom cylinder 3 have relative motion, the adjustable blade 203 of the damping force adjustment device 2 will rub against the damping fluid 6 to generate a damping force in the opposite direction of the motion.

[0027] The top cylinder 1 is a cylindrical structure with a hollow interior, and a notch 101 is provided in the top cylinder 1 to form an arc-shaped support plate 102. The notch 101 is provided at the lower section of the top cylinder 1 and occupies half of the lower section structure of the top cylinder 1. The remaining lower section structure of the top cylinder 1 is the arc-shaped support plate 102. A plurality of fixed blades 103 are arranged on the inner side of the arc-shaped support plate 102 from top to bottom, and a certain distance is spaced between two adjacent fixed blades 103 to form a built-in space 104 for accommodating the adjustable blade 203. The adjustable blade 203 can rotate under the drive of the blade main shaft 201. When the adjustable blade 203 gradually rotates toward the built-in space 104, the adjustable blade 203 begins to overlap with the fixed blade 103 in the vertical direction. As the adjustable blade 203 gradually goes deeper, the flowable space of the damping fluid inside the top cylinder 1 becomes larger, and the damping force provided by the damper also successively decreases, and vice versa increases.

[0028] The damping force adjusting device 2 is disposed on the top cylinder 1 and is used to adjust the damping force of the three-dimensional viscous damper in this embodiment. Specifically, the damping force adjusting device 2 includes: a blade main shaft 201 , a worm gear 202 , an adjusting worm 204 and a plurality of adjustable blades 203 .

[0029] The worm gear 202 is arranged on the blade main shaft 201 and meshes with the adjusting worm 204. Each adjustable blade 203 is arranged on the blade main shaft 201 in sequence from top to bottom. When the adjustable blade 203 and the fixed blade 103 do not overlap in the vertical direction, the adjustable blade 203 and the fixed blade 103 are respectively located on both sides of the blade main shaft 201. At this time, the flow space of the damping fluid is the smallest, and the damping force provided by the damper reaches the maximum. The adjustable blade 203 and the fixed blade 103 are arranged alternately in the vertical direction, that is, a fixed blade 103 is arranged at the height between the planes where every two adjustable blades 203 are located, that is, each adjustable blade 203 and each fixed blade 103 are arranged alternately from top to bottom, so that the adjustable blade 203 can be embedded in the built-in space 104 when it rotates under the drive of the blade main shaft 201, thereby realizing the adjustment of the overlapping degree of the adjustable blade 203 and the fixed blade 103.

[0030] The fixed blade 103 and the adjustable blade 203 are both semicircular, and a semicircular clearance groove 1031 is provided at the center of the fixed blade 103 to provide space for the installation of the blade main shaft 201. The blade main shaft 201 is a cylindrical structure, and the axis of the blade main shaft 201, the center of the fixed blade 103, and the center of the adjustable blade 203 are all located on the axis of the top cylinder 1 to ensure the rotational symmetry of the overall structure, thereby ensuring the adjustment accuracy.

[0031] Through holes are provided on both the fixed blades 103 and the adjustable blades 203 to facilitate the flow of part of the damping fluid. Firstly, this avoids completely closing the flow space of the damping fluid. Secondly, when the top cylinder 1 and the bottom cylinder 3 produce relative motion instantaneously, this avoids the formation of instantaneous damping force and affects the vibration reduction effect.

[0032] An end cover 105 is arranged at the top of the top cylinder 1, a partition plate 106 is arranged inside the top cylinder 1, and a stepped groove 107 is provided on both the end cover 105 and the partition plate 106; a first bearing 2011 installed in the stepped groove 107 is arranged on the blade main shaft 201. The outer ring of the first bearing 2011 is connected to the groove wall of the stepped groove 107, and the inner ring of the first bearing 2011 is connected to the blade main shaft 201. The above structural design can ensure the rotation stability of the blade main shaft 201.

[0033] Two outer tubes 108 are provided on the top cylinder 1 and communicate with the inside of the top cylinder 1. The two ends of the adjusting worm 204 are installed in the outer tube 108 through the second bearing 2041 and extend from the tube mouth of the outer tube 108 to ensure the rotation stability of the adjusting worm 204. A force adjustment block 205 is provided on the end surface of one end of the adjusting worm 204. The force adjustment block 205 can be used in conjunction with a wrench to rotate the adjusting worm 204.

[0034] The upper mounting plate 4 is arranged at the top of the top cylinder 1, and the lower mounting plate 5 is arranged at the bottom of the bottom cylinder 3, so as to facilitate installation and connection with other devices. When installing the damper of this embodiment, the main vibration direction of the target vibration reduction device is obtained by dynamic analysis of the target vibration reduction device. When installing the damper, try to ensure that the axis of the blade main shaft 201 is consistent with the main vibration direction of the target vibration reduction device. The damping force provided by the damper to the main vibration direction of the target vibration reduction device can be adjusted by adjusting the worm 204. Observing from the axial direction of the blade main shaft 201, when the adjustable blade 203 and the fixed blade 103 are completely overlapped, the damping force in the main vibration direction reaches the minimum; when the adjustable blade 203 and the fixed blade 103 have no overlap, the damping force in the main vibration direction reaches the maximum. The overlapping angle of the adjustable blade 203 and the fixed blade 103 varies in the range of 0-180 degrees.

[0035] The relationship between the damping force in the main vibration direction and the blade overlap angle is as follows:

[0036] Damping force in the main vibration direction = constant C – blade overlap angle × angle influence coefficient.

[0037] The constant C is related to the diameter of the top cylinder 1 , the height of the top cylinder 1 and the bottom cylinder 3 , the number of the adjustable blades 203 and the fixed blades 103 , and the viscosity of the damping medium.

[0038] The angle influence coefficient is related to the size and position of the through holes formed on the adjustable blade 203 and the fixed blade 103 .

[0039] When the adjustable blades 203 and the fixed blades 103 are within the adjustable range of 0-180 degrees, the damping force in the main vibration direction changes linearly, and the nonlinearity should be less than 10%; when the adjustable blades 203 and the fixed blades 103 are within the adjustable range of 0-180 degrees, the damping force in other directions will also change, and the change trend is similar to that of the damping force in the main vibration direction, but the change range is very small and is not considered in the design.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A three-dimensional viscous damper with adjustable damping force, characterized in that: include: A top cylinder and a damping force adjustment device arranged on the top cylinder; The top cylinder is provided with a plurality of fixed blades from top to bottom; The damping force adjustment device comprises: a blade main shaft, a worm gear, an adjustment worm and a plurality of adjustable blades, wherein the worm gear is arranged on the blade main shaft and meshes with the adjustment worm; The adjustable blades are arranged on the blade main shaft in sequence from top to bottom, and are alternately arranged with the fixed blades in the vertical direction.

2. The three-dimensional viscous damper with adjustable damping force according to claim 1, characterized in that: The top cylinder is a cylindrical structure with a hollow interior, and a notch is provided in the top cylinder to form an arc-shaped support plate. A plurality of fixed blades are arranged on the inner side of the arc-shaped support plate from top to bottom, and a certain distance is spaced between two adjacent fixed blades to form a built-in space for accommodating the adjustable blades.

3. The three-dimensional viscous damper with adjustable damping force according to claim 2, characterized in that: The fixed blade and the adjustable blade are both semicircular, and a semicircular clearance groove is provided at the center of the fixed blade; the blade main shaft is a cylindrical structure, and the axis of the blade main shaft, the center of the fixed blade and the center of the adjustable blade are all located on the axis of the top cylinder.

4. The three-dimensional viscous damper with adjustable damping force according to claim 3, characterized in that: An end cover is arranged on the top of the top cylinder, a partition plate is arranged inside the top cylinder, and stepped grooves are formed on the end cover and the partition plate; a first bearing installed in the stepped groove is arranged on the blade main shaft.

5. The three-dimensional viscous damper with adjustable damping force according to claim 4, characterized in that: Two outer tubes in communication with the interior of the top tube are arranged on the top tube, and two ends of the adjusting worm are installed in the outer tubes through second bearings and extend out from the tube mouth of the outer tubes.

6. The three-dimensional viscous damper with adjustable damping force according to claim 5, characterized in that: The end surface of one end of the adjusting worm is provided with a force adjusting block.

7. A three-dimensional viscous damper with adjustable damping force according to claim 1 or 6, characterized in that: The fixed blades and the adjustable blades are both provided with through holes.

8. The three-dimensional viscous damper with adjustable damping force according to claim 7, characterized in that: Also includes: The bottom cylinder is used for containing damping fluid, and the bottom cylinder is a cylindrical structure with an opening at the top, and the bottom end of the top cylinder extends from the top opening of the bottom cylinder into the interior of the bottom cylinder.

9. The three-dimensional viscous damper with adjustable damping force according to claim 8, characterized in that: Also includes: An upper mounting plate and a lower mounting plate; the upper mounting plate is arranged at the top of the top cylinder, and the lower mounting plate is arranged at the bottom of the bottom cylinder.

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