Squeal suppression bushing for hydraulic cylinder piston rod guide sleeve
By designing a multi-layer structure in the guide sleeve of the hydraulic cylinder piston rod, including a reinforced base layer, a limiting ring, a vibration damping buffer layer, and a self-lubricating contact layer, the problem of poor noise treatment in the prior art is solved, and multi-layer, wide-bandwidth, efficient noise reduction and stability improvement are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI ZHONGYU AEROHYDRAULIC
- Filing Date
- 2025-10-24
- Publication Date
- 2026-07-21
AI Technical Summary
Existing whistling suppression bushings absorb some vibration energy through a vibration damping buffer layer, resulting in poor noise reduction and causing a large amount of noise to radiate outwards, thus achieving unsatisfactory noise reduction.
A whistling suppression bushing for a hydraulic cylinder piston rod guide sleeve was designed. It adopts a multi-layer structure, including a reinforced base layer, a limiting ring, a vibration damping buffer layer, a self-lubricating contact layer, and a sound-absorbing cavity. Through the design of limiting grooves, sound-absorbing holes, and oil reservoirs, it achieves multiple limiting, sound absorption, and lubrication, and absorbs mid-to-high frequency noise.
It achieves multi-level, wide-bandwidth, and highly efficient noise reduction, enhances the stability of the bushing and guide sleeve, reduces noise radiation, improves lubrication, and lowers mid-to-high frequency noise.
Smart Images
Figure CN224533257U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of whistling suppression bushing technology, specifically to a whistling suppression bushing for a hydraulic cylinder piston rod guide sleeve. Background Technology
[0002] The hydraulic cylinder piston rod guide sleeve is a key component in the hydraulic system that supports the reciprocating motion of the piston rod. It undertakes the core functions of guiding and positioning, sealing and protection, and load transmission. The whistling suppression bushing, as a functional upgrade component adapted to the guide sleeve, solves the high-frequency whistling problem caused by abnormal friction, vibration resonance, insufficient lubrication, and installation deviation between the traditional guide sleeve and the piston rod by strengthening the base layer, vibration damping buffer layer, and self-lubricating contact layer.
[0003] During the design process of this utility model, the following problems were discovered in the existing technology: Commonly used whistling suppression bushings rely solely on the damping properties of their material to absorb some vibration energy, thus reducing noise. However, the noise reduction effect is not high, and a large amount of noise will still be transmitted through the structure and radiated to the outside, greatly diminishing the noise reduction effect. Utility Model Content
[0004] The purpose of this invention is to provide a whistling suppression bushing for the guide sleeve of a hydraulic cylinder piston rod, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a whistling suppression bushing for a hydraulic cylinder piston rod guide sleeve, comprising a guide sleeve, a reinforced substrate layer installed on the inner side of the guide sleeve, a limit ring uniformly fixedly connected to the outer side of the reinforced substrate layer, a connecting ring uniformly bonded to the inner wall of the reinforced substrate layer, a vibration damping buffer layer fixedly connected to the inner side of the connecting ring, a self-lubricating contact layer bonded to the inner side of the vibration damping buffer layer, and retaining rings welded to the top and bottom of the reinforced substrate layer, the vibration damping buffer layer, and the self-lubricating contact layer.
[0006] The beneficial effects of this utility model are as follows: by adding multiple limiting rings and limiting grooves, the bushing can be limited in multiple ways, so that the bushing and the guide sleeve can be tightly connected, thereby increasing stability and avoiding noise caused by shaking. In addition, a sound-absorbing cavity is added, so that noise can enter into the sound-absorbing cavity, thereby absorbing and attenuating the noise. Furthermore, the sound-absorbing material can cause the sound waves to be reflected and rubbed multiple times, converting sound energy into heat energy for dissipation. It has a particularly good absorption effect on mid-to-high frequency noise, thus forming a multi-layered, wide-bandwidth, and highly efficient noise reduction effect, further absorbing noise.
[0007] To ensure stability during installation: Further configuration: The inner wall of the guide sleeve is uniformly provided with limiting grooves that are consistent with the external dimensions and structure of the limiting ring.
[0008] By adopting the above technical solution, when the bushing is installed in the guide sleeve by interference fit, the limiting groove can limit the limiting ring, and multiple limiting can be performed, so that the bushing and the guide sleeve can be tightly connected, thereby increasing stability.
[0009] To increase the shock absorption effect: Further settings include: the connecting ring is made of rubber.
[0010] By adopting the above technical solution, the shock absorption effect can be further increased through the connecting ring, thereby reducing noise to a certain extent.
[0011] To achieve noise absorption: Further configuration: the top of the connecting ring is uniformly provided with sound-absorbing holes, and the inner side of the sound-absorbing holes is filled with sound-absorbing material, and the gap between the connecting rings is set as a sound-absorbing cavity.
[0012] By adopting the above technical solution, the noise generated when the piston rod moves can enter the silencing cavity, thereby absorbing and attenuating the noise. Furthermore, the sound waves can be reflected and rubbed multiple times within the cavity by the sound-absorbing material, converting sound energy into heat energy for dissipation. It has a particularly good absorption effect on mid-to-high frequency noise, thus forming a multi-layered, wide-bandwidth, and highly efficient noise reduction effect, further absorbing noise.
[0013] To enhance the anti-slip effect: Further configuration: The inner wall of the vibration damping buffer layer is uniformly and fixedly connected with protrusions.
[0014] By adopting the above technical solution, when the self-lubricating contact layer is bonded to the inner wall of the vibration damping buffer layer, the protrusions can increase the anti-slip effect and avoid the possibility of shaking and increasing noise generation.
[0015] To achieve effective lubrication: Further configuration: An oil reservoir is provided on the inner wall of the self-lubricating contact layer.
[0016] By adopting the above technical solution, lubricating oil can be injected through the oil reservoir to form a continuous oil film covering the inner wall of the self-lubricating contact layer and the surface of the piston rod, ensuring lubrication effect during long-term operation and reducing noise problems caused by insufficient lubrication.
[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the main view of this utility model; Figure 2 This is a schematic diagram of the main sectional view of this utility model; Figure 3 This is a front view exploded view of the present invention.
[0019] In the diagram: 1. Guide sleeve; 2. Reinforced substrate layer; 3. Limiting ring; 4. Connecting ring; 5. Vibration damping buffer layer; 6. Self-lubricating contact layer; 7. Retaining ring. Detailed Implementation
[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.
[0021] See Figures 1 to 3 The whistling suppression bushing of the hydraulic cylinder piston rod guide sleeve includes a guide sleeve 1. A reinforcing base layer 2 is installed on the inner side of the guide sleeve 1. A limit ring 3 is uniformly fixedly connected to the outer side of the reinforcing base layer 2. A connecting ring 4 is uniformly bonded to the inner wall of the reinforcing base layer 2. A vibration damping buffer layer 5 is fixedly connected to the inner side of the connecting ring 4. A self-lubricating contact layer 6 is bonded to the inner side of the vibration damping buffer layer 5. A retaining ring 7 is welded to the top and bottom of the reinforcing base layer 2, the vibration damping buffer layer 5 and the self-lubricating contact layer 6.
[0022] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the inner wall of the guide sleeve 1 is uniformly provided with limiting grooves that are consistent with the external dimensions and structure of the limiting ring 3.
[0023] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the connecting ring 4 is made of rubber.
[0024] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the top of the connecting ring 4 is uniformly provided with sound-absorbing holes, and the inner side of the sound-absorbing holes is filled with sound-absorbing material. The gap between the connecting rings 4 is set as a sound-absorbing cavity.
[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the inner wall of the vibration damping buffer layer 5 is uniformly fixed with protrusions.
[0026] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, an oil reservoir is provided on the inner wall of the self-lubricating contact layer 6.
[0027] The squeal suppression bushing of the hydraulic cylinder piston rod guide sleeve works as follows: First, the limiting ring 3 is installed inside the limiting groove. At this time, the reinforcing base layer 2 is located on the inner wall of the guide sleeve 1. Then, the connecting ring 4 is installed inside the reinforcing base layer 2 by bonding. Then, the self-lubricating contact layer 6 is installed inside the vibration damping buffer layer 5, and a certain anti-slip effect is added by protrusions. Then, lubricating oil is injected through the oil reservoir. Then, the retaining ring 7 is installed at the top and bottom of the reinforcing base layer 2, the vibration damping buffer layer 5 and the self-lubricating contact layer 6 by welding. When the piston rod moves, the vibration damping buffer layer 5 and the connecting ring 4 will absorb some vibration energy by relying on their own material buffering characteristics, thereby processing the noise. The mid-to-high frequency noise will be absorbed through the silencing cavity, and then the noise will be further absorbed by the sound-absorbing material, thereby improving the effect of howling suppression.
[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art.
Claims
1. A squeal-suppressing bushing for a hydraulic cylinder piston rod guide sleeve, comprising a guide sleeve (1), characterized in that: The inner side of the guide sleeve (1) is equipped with a reinforced substrate layer (2), and a limit ring (3) is uniformly fixedly connected to the outside of the reinforced substrate layer (2). A connecting ring (4) is uniformly bonded to the inner wall of the reinforced substrate layer (2). A vibration damping buffer layer (5) is fixedly connected to the inner side of the connecting ring (4). A self-lubricating contact layer (6) is bonded to the inner side of the vibration damping buffer layer (5). A retaining ring (7) is welded to the top and bottom of the reinforced substrate layer (2), the vibration damping buffer layer (5) and the self-lubricating contact layer (6).
2. The squeal suppression bushing for the hydraulic cylinder piston rod guide sleeve as described in claim 1, characterized in that: The inner wall of the guide sleeve (1) is uniformly provided with limiting grooves that are consistent with the external dimensions and structure of the limiting ring (3).
3. The squeal suppression bushing for the hydraulic cylinder piston rod guide sleeve as described in claim 1, characterized in that: The connecting ring (4) is made of rubber.
4. The squeal suppression bushing for the hydraulic cylinder piston rod guide sleeve as described in claim 1, characterized in that: The top of the connecting ring (4) is uniformly provided with sound-absorbing holes, and the inner side of the sound-absorbing holes is filled with sound-absorbing material, and the gap between the connecting rings (4) is set as a sound-absorbing cavity.
5. The squeal suppression bushing for the hydraulic cylinder piston rod guide sleeve as described in claim 1, characterized in that: The inner wall of the vibration damping buffer layer (5) is uniformly fixed with protrusions.
6. The squeal-suppressing bushing for the hydraulic cylinder piston rod guide sleeve as described in claim 1, characterized in that: The inner wall of the self-lubricating contact layer (6) is provided with an oil storage groove.