Hydraulic cylinder barrel sealing assembly with leak-proof function

Abstract

The utility model discloses a hydraulic cylinder barrel sealing assembly with a leakproof function, and relates to the technical field of hydraulic cylinder barrel sealing, the hydraulic cylinder barrel sealing assembly comprises a cylinder barrel and a piston assembly, the piston assembly is installed in the cylinder barrel, the inner wall of the cylinder barrel is provided with a limiting groove, and an O-shaped sealing ring II is installed in the limiting groove; the hydraulic cylinder is provided with the double sealing assemblies, when a V-shaped sealing ring, a Y-shaped sealing ring or an O-shaped sealing ring in the front-end sealing mechanism is damaged and fails due to long-term friction, the dynamic buffering mechanism can still maintain sealing through abutting fit of the moving ring sealing ring and the driving ring, the sealing performance of the hydraulic cylinder under the extreme working condition is ensured, the system safety is improved, and the service life of the hydraulic cylinder is prolonged. Due to the collaborative design of the dynamic buffer mechanism, the spring and the positioning ring, along with small-amplitude frequent vibration of the piston assembly, the piston assembly and the dynamic buffer mechanism synchronously move at the moment, the positioning ring located on the upper sealing seat vibrates in a limiting groove in the inner wall of the whole cylinder barrel, and static protection of the movable sealing ring is achieved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder barrel sealing technology, specifically to a hydraulic cylinder barrel sealing assembly with anti-leakage function. Background Technology

[0002] In the application of hydraulic cylinders, the performance of cylinder sealing components is directly related to the stability and efficiency of the entire hydraulic system. Traditional hydraulic cylinder sealing components often use a single sealing structure, such as O-rings or V-rings. During long-term use, these sealing structures are prone to leakage problems due to friction, wear and changes in working conditions. Especially under some extreme working conditions, such as high temperature, high pressure or frequent vibration environments, the sealing performance of traditional sealing components often drops significantly, which can lead to hydraulic system failures, or even equipment damage and safety accidents.

[0003] In addition, traditional sealing components also present many inconveniences in terms of installation and maintenance. For example, some sealing components require complex assembly processes and high assembly precision. Improper assembly can easily lead to leakage problems. In terms of maintenance, traditional sealing components often need to be replaced regularly, which not only increases maintenance costs but also affects the continuous operating efficiency of the equipment.

[0004] Therefore, we propose a hydraulic cylinder barrel sealing assembly with leak-proof function. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic cylinder sealing assembly with anti-leakage function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder barrel sealing assembly with anti-leakage function, including a cylinder barrel and a piston assembly, wherein the piston assembly is installed inside the cylinder barrel, a limit groove is formed on the inner wall of the cylinder barrel, and an O-ring seal is installed in the limit groove;

[0007] A dynamic buffer mechanism is slidably connected inside the cylinder and located in the limiting groove. The dynamic buffer mechanism includes a lower sealing seat, an upper sealing seat, a dynamic ring sealing ring, and a drive ring. The upper sealing seat is slidably connected inside the cylinder and located in the limiting groove. The bottom of the upper sealing seat is fixed to the lower sealing seat by a positioning pin. The dynamic ring sealing ring is embedded in the inner wall of the upper sealing seat and the lower sealing seat. The drive ring is sleeved inside the lower sealing seat and located on the side of the dynamic ring sealing ring. The drive ring abuts against the dynamic ring sealing ring.

[0008] Furthermore, a stationary ring sealing ring is fitted onto the outer wall of the upper sealing seat, and a positioning ring is fitted onto the outer wall of the upper sealing seat for fixation.

[0009] Furthermore, the protrusion on the upper sidewall of the positioning ring corresponds to the limiting groove, and four buffer cavities are provided on the inner wall of the limiting groove, with the thickness of the buffer cavity being twice the thickness of the positioning ring.

[0010] Furthermore, a front sealing mechanism is installed on one side of the cylinder. The front sealing mechanism includes an end cap. The end cap is fixedly connected to the cylinder side. A V-shaped sealing ring is installed in the inner groove of the end cap. A Y-shaped sealing ring is installed on the inner wall of the end cap and on the side of the V-shaped sealing ring. An O-shaped sealing ring is installed on the inner wall of the end cap and on the side of the Y-shaped sealing ring.

[0011] Furthermore, a spring is fitted inside the cylinder and located on the side of the upper sealing seat. One side of the spring abuts against the positioning ring, and the other side abuts against the inner wall of the cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, by setting up a dual sealing assembly, when the V-type, Y-type, or O-type sealing ring in the front sealing mechanism fails due to long-term friction damage, the dynamic buffer mechanism can still maintain the seal through the contact and cooperation between the dynamic ring sealing ring and the drive ring, ensuring the sealing performance of the hydraulic cylinder under extreme working conditions and improving system safety. The coordinated design of the dynamic buffer mechanism, spring, and positioning ring, along with the frequent small-amplitude vibration of the piston assembly, causes the piston assembly and the dynamic buffer mechanism to move synchronously. The positioning ring on the upper sealing seat vibrates in the limiting groove of the entire cylinder inner wall, achieving static protection of the dynamic ring sealing ring and preventing leakage of the front dynamic seal due to frequent friction failure. This simplifies the assembly process and achieves adaptive adjustment through the elastic support of the buffer chamber and spring, further reducing maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the hydraulic cylinder barrel sealing assembly with anti-leakage function of this utility model;

[0015] Figure 2 This is a schematic diagram of the installation structure of the dynamic buffer mechanism inside the cylinder of this utility model;

[0016] Figure 3 This is an exploded structural diagram of the hydraulic cylinder barrel sealing assembly with anti-leakage function according to this utility model;

[0017] Figure 4 This is a schematic diagram of the installation structure of the cylinder inner wall limiting groove of this utility model.

[0018] In the diagram: 1. Cylinder; 2. Piston assembly; 3. Front sealing mechanism; 301. End cap; 302. V-ring seal; 303. O-ring seal one; 304. Y-ring seal; 4. Limiting groove; 5. O-ring seal two; 6. Dynamic buffer mechanism; 601. Lower sealing seat; 602. Upper sealing seat; 603. Dynamic ring seal; 604. Drive ring; 7. Static ring seal; 8. Positioning ring; 9. Spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution:

[0021] Please see Figures 1 to 4 This embodiment provides a hydraulic cylinder sealing assembly with anti-leakage function, including a cylinder 1 and a piston assembly 2. The piston assembly 2 is installed inside the cylinder 1 and reciprocates inside the cylinder 1. A limiting groove 4 is formed on the inner wall of the cylinder 1. The limiting groove 4 is used to install and fix the sealing assembly, and at the same time restricts the movement trajectory of the sealing assembly.

[0022] As for the dynamic buffer mechanism 6 installed inside the entire cylinder 1, it is used to adapt to the entire piston assembly 2. An O-ring seal 5 is installed in the limiting groove 4. The O-ring seal 5 serves as the first sealing line between the cylinder 1 and the dynamic buffer mechanism 6, playing a preliminary sealing role. However, in this embodiment, a stationary ring seal is also set as the second sealing line for subsequent vibration sealing of the dynamic buffer mechanism 6.

[0023] The dynamic buffer mechanism 6 includes a lower sealing seat 601, an upper sealing seat 602, a dynamic ring sealing ring 603, and a drive ring 604. The upper sealing seat 602 is slidably connected inside the cylinder 1 and located in the limiting groove 4. The upper sealing seat 602 can reciprocate along the limiting groove 4. During installation, the four protrusions of the upper sealing seat 602 are inserted into the limiting groove 4. Figure 4 As shown, after insertion, a slight rotation is performed so that the four protrusions of the upper sealing seat 602 abut against the upper sealing cavity of the limiting groove 4. The bottom of the upper sealing seat 602 is fixed with the lower sealing seat 601 by a positioning pin. The lower sealing seat 601 and the upper sealing seat 602 form an integral structure. A dynamic ring sealing ring 603 is embedded in the inner wall of the upper sealing seat 602 and the lower sealing seat 601. The dynamic ring sealing ring 603 is flush with the inner wall of the cylinder 1 and also plays a sealing role.

[0024] A drive ring 604 is sleeved and installed inside the lower sealing seat 601 and on the side of the moving ring seal 603. The drive ring 604 abuts against the moving ring seal 603. When the piston assembly 2 reciprocates in the cylinder 1, it will drive the upper sealing seat 602 and the lower sealing seat 601 to move together. At this time, the moving ring seal 603 rubs against the outer wall of the piston assembly 2 and moves synchronously. Under the action of the spring 9, it will push away the moving ring seal 603 on the piston assembly 2, so that the entire dynamic buffer mechanism 6 moves synchronously with the piston assembly 2 over a small distance. Due to the abutting cooperation between the drive ring 604 and the moving ring seal 603, the sealing effect can be further enhanced.

[0025] When the piston assembly 2 at the front end of the cylinder 1 vibrates, the piston assembly 2 moves only slightly. The front sealing mechanism 3 installed inside the front cylinder 1 is equipped with a V-ring 302 and a Y-ring 304, which are dynamic seals. As the piston assembly 2 moves frequently with the vibration, it is prone to friction damage. The sealing effect of a single O-ring 303 is limited. However, when the piston assembly 2 vibrates slightly, the entire dynamic buffer mechanism 6 moves synchronously, and the piston assembly 2 and the dynamic ring seal 603 remain stationary, resulting in a good sealing effect. This avoids the problem of leakage at the front end without corresponding protective measures.

[0026] The protrusion on the upper side wall of the positioning ring 8 corresponds to the limiting groove 4, which allows the positioning ring 8 to move stably within the limiting groove 4. At the same time, four buffer cavities are provided on the inner wall of the limiting groove 4. The buffer cavities can absorb the impact and vibration of the sealing assembly during the movement, protecting the sealing assembly from damage. The thickness of the buffer cavity is twice the thickness of the positioning ring 8, which ensures that the positioning ring 8 has sufficient movement space within the buffer cavity.

[0027] A front sealing mechanism 3 is installed on one side of the cylinder 1. The front sealing mechanism 3 includes an end cover 301. The end cover 301 is fixedly connected to the side of the cylinder 1. A V-shaped sealing ring 302 is installed in the inner groove of the end cover 301. The V-shaped sealing ring 302 serves as the first line of defense for front sealing and plays a sealing role. At the same time, a Y-shaped sealing ring 304 and an O-shaped sealing ring 303 are installed on the inner wall of the end cover 301 and on the side of the V-shaped sealing ring 302. The Y-shaped sealing ring 304 and the O-shaped sealing ring 303 serve as auxiliary sealing elements and can further enhance the sealing performance of the front sealing.

[0028] In addition, a spring 9 is installed inside the cylinder 1 and on the side of the upper sealing seat 602. One side of the spring 9 abuts against the positioning ring 8 and the other side abuts against the inner wall of the cylinder 1. The spring 9 can absorb the impact and vibration of the piston assembly 2 during reciprocating motion, protecting the sealing assembly from damage. At the same time, the elastic support of the spring 9 can also realize the adaptive adjustment of the sealing assembly, ensuring the sealing performance under different working conditions. Through innovative designs such as setting up a double sealing assembly and a dynamic buffer mechanism, efficient sealing and adaptive adjustment functions under extreme working conditions are achieved.

[0029] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A hydraulic cylinder barrel sealing assembly with anti-leakage function, comprising a cylinder barrel (1) and a piston assembly (2), wherein the piston assembly (2) is installed inside the cylinder barrel (1), characterized in that: The inner wall of the cylinder (1) is provided with a limiting groove (4), and an O-ring seal (5) is installed in the limiting groove (4); A dynamic buffer mechanism (6) is slidably connected inside the cylinder (1) and located in the limiting groove (4). The dynamic buffer mechanism (6) includes a lower sealing seat (601), an upper sealing seat (602), a dynamic ring sealing ring (603), and a drive ring (604). The upper sealing seat (602) is slidably connected inside the cylinder (1) and located in the limiting groove (4). The bottom of the upper sealing seat (602) is fixed to the lower sealing seat (601) by a positioning pin. The dynamic ring sealing ring (603) is embedded in the inner wall of the upper sealing seat (602) and the lower sealing seat (601). The drive ring (604) is sleeved and installed inside the lower sealing seat (601) and located on the side of the dynamic ring sealing ring (603). The drive ring (604) abuts against the dynamic ring sealing ring (603).

2. The hydraulic cylinder barrel sealing assembly with anti-leakage function according to claim 1, characterized in that: A stationary ring seal (7) is fitted on the outer wall of the upper sealing seat (602), and a positioning ring (8) is fitted on the outer wall of the upper sealing seat (602).

3. The hydraulic cylinder barrel sealing assembly with anti-leakage function according to claim 2, characterized in that: The protrusion on the upper side wall of the positioning ring (8) corresponds to the limiting groove (4). The inner wall of the limiting groove (4) is provided with four buffer cavities, and the thickness of the buffer cavity is twice the thickness of the positioning ring (8).

4. The hydraulic cylinder barrel sealing assembly with anti-leakage function according to claim 3, characterized in that: A front sealing mechanism (3) is installed on one side of the cylinder (1). The front sealing mechanism (3) includes an end cap (301). The end cap (301) is fixedly connected to the side of the cylinder (1). A V-shaped sealing ring (302) is installed in the inner groove of the end cap (301). A Y-shaped sealing ring (304) is installed on the inner wall of the end cap (301) and on the side of the V-shaped sealing ring (302). An O-shaped sealing ring (303) is installed on the inner wall of the end cap (301) and on the side of the Y-shaped sealing ring (304).

5. The hydraulic cylinder barrel sealing assembly with anti-leakage function according to claim 4, characterized in that: A spring (9) is fitted inside the cylinder (1) and on the side of the upper sealing seat (602). One side of the spring (9) abuts against the positioning ring (8), and the other side abuts against the inner wall of the cylinder (1).

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