Novel perforated rotary viscous damper
By designing a novel perforated rotary viscous damper with a rotating shaft and rotating blades, the failure problem of viscous dampers under overload was solved, achieving a more stable energy dissipation and vibration reduction effect.
Patent Information
- Application Number
- CN202520490258.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Existing viscous dampers are prone to piston failure under overload or large impact forces, leading to damper failure.
A novel perforated rotary viscous damper is designed, which uses a rotating shaft and multiple rotating shaft blades. The blades are mechanically rotated by the rotation of the cylinder, and the circular hole generates resistance to dissipate energy and avoid stress concentration.
This effectively avoids stress concentration during damper operation, improves the energy dissipation and vibration reduction effect of the structure, and enhances the stability and durability of the damper.
Smart Images
Figure CN223937387U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy dissipation and vibration reduction technology in civil engineering, specifically to a novel perforated rotary viscous damper. Background Technology
[0002] With the development of seismic and wind-resistant design theory in civil engineering structures, the concept of energy dissipation and vibration reduction has been applied in the seismic resistance of various building projects, and the design and use of energy dissipation components and dampers have become increasingly common. Among them, metal yield dampers can simultaneously provide additional stiffness and damping to the structure, possessing stable hysteretic characteristics, good low-cycle fatigue resistance, and strong environmental adaptability, making their application prospects in practical engineering extremely broad. High-performance metal yield dampers are very suitable for controlling the displacement response of structures under earthquakes. Viscous dampers are a new type of metal damper, characterized by strong energy dissipation capacity, high efficiency, and no change to the oscillation frequency characteristics of the structure.
[0003] However, existing viscous dampers have a piston and a cylinder. When the viscous damper is in action, the piston reciprocates within the cylinder, squeezing the viscous fluid inside the cylinder and generating resistance to dissipate energy during an earthquake. When the viscous damper is overloaded and subjected to a large impact force, the piston will rapidly squeeze the viscous fluid, which can easily lead to the failure of the shock absorber. Utility Model Content
[0004] The purpose of this invention is to overcome the problem that the viscous fluid in the piston cylinder of the existing viscous damper is prone to failure when the viscous damper is overloaded or subjected to large impact forces. This invention provides a new type of open-hole rotary viscous damper with a simple structure, good energy dissipation and vibration reduction effect, and wide application range.
[0005] To achieve the above objectives, this utility model provides a novel open-hole rotary viscous damper, which includes an outer cylinder, a rotating shaft, rotating shaft blades, a left end cover, and a right end cover. The rotating shaft is located inside the outer cylinder and is arranged along the central axis of the outer cylinder. Multiple rotating shaft blades extend radially outward from the outer wall of the rotating shaft to a position close to the inner wall of the outer cylinder. The left end cover and the right end cover are detachably sealed to the outer cylinder from both ends. A left sliding sleeve for the rotating shaft is provided between the left end cover and the left end of the rotating shaft, and a right sliding sleeve for the rotating shaft is provided between the right end cover and the right end of the rotating shaft. Both the left and right sliding sleeves are configured to allow the injection of working fluid into the working gap of the structure and the working gap inside the outer cylinder. The rotating shaft blades have multiple circular holes.
[0006] Preferably, the novel open-hole rotary viscous damper further includes a right end, which is sleeved on the rotating shaft and sealed to the rightmost end of the outer cylinder, and the rightmost end of the rotating shaft extends through the right end to the outside of the outer cylinder.
[0007] Preferably, a rotating shaft sealing ring is also fitted on the rotating shaft. The rotating shaft sealing ring is located at the joint of the right sliding sleeve, the right end cover and the right end of the rotating shaft and seals the right sliding sleeve, the right end cover and the right end of the rotating shaft at the same time.
[0008] Preferably, the novel perforated rotary viscous damper further includes a mounting flange, which is fitted and sealed to the outermost rightmost wall of the outer cylinder.
[0009] Preferably, the multiple rotating shaft blades are evenly distributed along the circumferential direction.
[0010] Preferably, there are three rotating shaft blades and the included angle between adjacent rotating shaft blades is 120°.
[0011] Preferably, the multiple circular holes are arranged in a straight line.
[0012] Preferably, the multiple circular holes are equidistant from each other.
[0013] Preferably, a right end cover sealing ring is provided between the right end cover and the inner wall of the rotating shaft.
[0014] Preferably, a left end cover sealing ring is provided between the left end cover and the inner wall of the rotating shaft.
[0015] According to the above technical solution, the damper provided by this utility model has a rotating shaft inside, and perforated blades are welded on the shaft. To avoid stress concentration, the cross-section of the perforations is designed to be circular. In this way, the damper drives the rotating blades to rotate mechanically through the rotating shaft of the cylinder. The viscous fluid in the cylinder generates resistance through the circular holes, consuming external energy and achieving the purpose of energy dissipation and vibration reduction of the structure. Attached Figure Description
[0016] Figure 1 This is a structural schematic diagram of the novel perforated rotary viscous damper provided by this utility model;
[0017] Figure 2 yes Figure 1 Sectional view at point AA;
[0018] Figure 3 yes Figure 1 Sectional view at point BB;
[0019] Figure 4 yes Figure 1 Sectional view at point CC.
[0020] Explanation of reference numerals in the attached figures
[0021] 1-Outer cylinder barrel 2-Mounting flange
[0022] 3-Rotating shaft seal ring 4-Rotating shaft
[0023] 5-Rotating shaft blade; 6-Rotating shaft left sliding sleeve
[0024] 7-Left end cover 8-Right sliding sleeve of rotating shaft
[0025] 9-Right end cap 10-Right end head Detailed Implementation
[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0027] In this utility model, unless otherwise stated, directional words such as "left," "right," "inner," and "outer" included in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.
[0028] See Figures 1 to 4 This utility model provides a novel open-hole rotary viscous damper, which includes an outer cylinder 1, a rotating shaft 4, rotating shaft blades 5, a left end cover 7, and a right end cover 9. The rotating shaft 4 is located inside the outer cylinder 1 and is arranged along the central axis of the outer cylinder 1. Multiple rotating shaft blades 5 extend radially outward from the outer wall of the rotating shaft 4 to a position close to the inner wall of the outer cylinder 1. The left end cover 7 and the right end cover 9 are detachably and sealingly connected to the outer cylinder 1 from both ends. A left sliding sleeve 6 is provided between the left end cover 7 and the left end of the rotating shaft 4, and a right sliding sleeve 8 is provided between the right end cover 9 and the right end of the rotating shaft 4. Both the left and right sliding sleeves 6 and 8 are configured to allow the injection of working fluid into the working gap of the structure and the working gap inside the outer cylinder 1. The rotating shaft blades 5 have multiple circular holes.
[0029] Through the above technical solution, a rotating shaft 4 is installed inside the damper, and perforated blades 5 are welded onto the shaft. To avoid stress concentration, the cross-section of the perforations is designed to be circular. In this way, the damper drives the rotating blades to rotate mechanically through the cylinder's rotating shaft. The viscous fluid inside the cylinder generates resistance through the circular holes, consuming external energy. This effectively avoids severe stress concentration at the fixed parts when the damper is in operation, achieving the purpose of structural energy dissipation and vibration reduction.
[0030] In this embodiment, in order to improve the sealing performance of the right end of the novel open-hole rotary viscous damper, and at the same time maintain the stability of the rotating shaft 4 during installation and rotation operation, and prevent it from swinging or vibrating and seriously affecting the energy dissipation and vibration reduction function of the overall structure, preferably, the novel open-hole rotary viscous damper also includes a right end head 10, which is sleeved on the rotating shaft 4 and sealed to the rightmost end of the outer cylinder 1, and the rightmost end of the rotating shaft 4 extends outward through the right end head 10 to the outside of the outer cylinder 1.
[0031] Similarly, in this embodiment, a rotating shaft sealing ring 3 is preferably fitted onto the rotating shaft 4. The rotating shaft sealing ring 3 is located at the joint of the right sliding sleeve 8, the right end cover 9, and the right end 10 of the rotating shaft, and simultaneously seals the right sliding sleeve 8, the right end cover 9, and the right end 10. Furthermore, more preferably, this novel open-hole rotating viscous damper also includes a mounting flange 2, which is fitted and sealed to the outermost rightmost outer wall of the outer cylinder 1. In this way, during installation, the mounting flange 2 is fitted onto the outer cylinder 1 of the damper, forming a tight connection with the outer cylinder 1, and simultaneously sealing the right end 10 of the damper and the rotating shaft 4 of the damper, isolating the internal and external connections, effectively preventing leakage of viscous liquid, and ensuring normal operation.
[0032] When setting the above-mentioned multiple rotating shaft blades 5, in order to enable them to assist the new type of open-hole rotating viscous damper in utilizing the viscosity of the viscous rotating damper working fluid and the relative rotation of the rotating shaft blades 5 in the cylinder during the rotation of the rotating shaft 4, thereby consuming the rotational energy of the external device and ensuring the safety of the external working device during operation, preferably, the multiple rotating shaft blades 5 are evenly distributed in the circumferential direction. Using evenly distributed rotating shaft blades 5 can apply more uniform force and evenly bear the force applied by the outside.
[0033] Furthermore, in order to avoid occupying too much workspace due to an excessive number of rotating shaft blades 5, and at the same time, in order to simplify the internal structure of this new type of perforated rotating viscous damper and reduce the difficulty of part processing, it is preferable that there are three rotating shaft blades 5 and the included angle between adjacent rotating shaft blades 5 is 120°.
[0034] To further optimize the arrangement of the rotating shaft blades 5, making the novel perforated rotary viscous damper more stable and balanced during operation, it is preferable to arrange the multiple circular holes in a straight line. Furthermore, it is preferable that the multiple circular holes are equidistant from each other.
[0035] In addition, to improve the sealing performance of this novel open-hole rotary viscous damper and prevent the internal working fluid from leaking out and affecting the damper's function, a right end cover sealing ring is preferably provided between the right end cover 9 and the inner wall of the rotating shaft 4. Similarly, a left end cover sealing ring is preferably provided between the left end cover 7 and the inner wall of the rotating shaft 4.
[0036] In one specific embodiment, when assembling the novel open-hole rotary viscous damper, the left sliding sleeve 6 of the rotating shaft is first tightly fitted onto the left side of the rotating shaft 4, and the right side of the left end cover 7 abuts against the left end of the cylinder. The left end cover 7 is tightly connected to the left end of the damper cylinder through the external thread of the left end cover. The left side of the rotating shaft 4 is inserted through the inner hole of the bearing sleeve of the left end cover, and the right side of the bearing sleeve of the left end cover abuts against the left end of the left sliding sleeve 6 of the rotating shaft. The right sliding sleeve 8 of the rotating shaft is tightly fitted onto the right side of the rotating shaft 4, with its left end close to the right end of the rotating shaft blade 5. Viscous damping fluid is added to the working clearance and other relevant clearances inside the damper cylinder 1. After the right end cover 9 is fitted with the right end cover sealing ring, it is fitted onto the rotating shaft 4. The left end of the right end cover bearing sleeve abuts against the right side of the right sliding sleeve 8 of the rotating shaft. Simultaneously, the right end cover 9 forms a tight connection with the cylinder 1. The right end head 10 is fitted onto the rotating shaft 4, with its left end close to the right side of the right end cover 9 and the right side of the rotating shaft sealing ring 3. Its outer circumference is reliably connected to the right end of the damper cylinder 1 via threads. The rotating shaft blades of the damper cylinder are 120 degrees apart, and a row of equally sized and spaced circular openings are made on the blades, effectively preventing severe stress concentration at the fixing points during damper operation. The mounting flange 2 is fitted onto the outer cylinder of the damper, forming a tight connection with the outer cylinder and simultaneously sealing the right end 10 of the damper and the rotating shaft 4 of the damper, isolating the internal and external connections and preventing leakage of viscous fluid. The left end cover 7 and the right end cover 9 are respectively connected to the cylinder via their external threads.
[0037] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.
Claims
1. A novel open-hole rotary viscous damper, characterized in that, The novel perforated rotary viscous damper includes an outer cylinder (1), a rotating shaft (4), rotating shaft blades (5), a left end cover (7), and a right end cover (9). The rotating shaft (4) is located inside the outer cylinder (1) and is arranged along the central axis of the outer cylinder (1). Multiple rotating shaft blades (5) extend radially outward from the outer wall of the rotating shaft (4) to a position close to the inner wall of the outer cylinder (1). The left end cover (7) and the right end cover (9) are respectively accessible from both ends. The outer cylinder (1) is detachably sealed. A left sliding sleeve (6) of the rotating shaft is provided between the left end cover (7) and the left end of the rotating shaft (4). A right sliding sleeve (8) of the rotating shaft is provided between the right end cover (9) and the right end of the rotating shaft (4). Both the left sliding sleeve (6) and the right sliding sleeve (8) of the rotating shaft are configured to allow the injection of working fluid into the working gap of the structure and the working gap inside the outer cylinder (1). The rotating shaft blade (5) has multiple circular holes.
2. The novel open-hole rotary viscous damper according to claim 1, characterized in that, The novel open-hole rotary viscous damper also includes a right end (10), which is sleeved on the rotating shaft (4) and sealed to the rightmost end of the outer cylinder (1). The rightmost end of the rotating shaft (4) extends through the right end (10) to the outside of the outer cylinder (1).
3. The novel open-hole rotary viscous damper according to claim 2, characterized in that, The rotating shaft (4) is also fitted with a rotating shaft sealing ring (3), which is located at the joint of the right sliding sleeve (8), the right end cover (9) and the right end (10) of the rotating shaft and simultaneously seals the right sliding sleeve (8), the right end cover (9) and the right end (10) of the rotating shaft.
4. The novel open-hole rotary viscous damper according to claim 3, characterized in that, The novel perforated rotary viscous damper also includes a mounting flange (2), which is fitted and sealed to the outermost rightmost outer wall of the outer cylinder (1).
5. The novel open-hole rotary viscous damper according to claim 1, characterized in that, The rotating shaft blades (5) are evenly distributed along the circumferential direction.
6. The novel open-hole rotary viscous damper according to claim 5, characterized in that, The rotating shaft blades (5) are three in number, and the included angle between adjacent rotating shaft blades (5) is 120°.
7. The novel open-hole rotary viscous damper according to claim 1, characterized in that, The plurality of circular holes are arranged in a straight line.
8. The novel open-hole rotary viscous damper according to claim 7, characterized in that, The plurality of circular holes are equidistant from each other.
9. The novel open-hole rotary viscous damper according to claim 1, characterized in that, A right end cap sealing ring is provided between the right end cap (9) and the inner wall of the rotating shaft (4).
10. The novel open-hole rotary viscous damper according to claim 1, characterized in that, A sealing ring for the left end cover (7) is provided between the left end cover (7) and the inner wall of the rotating shaft (4).