Self-adaptive sealing ring made of dielectric elastomer material and sealing device

Abstract

The invention discloses a self-adaptive sealing ring made of dielectric elastomer materials and a sealing device. The self-adaptive sealing ring made of the dielectric elastomer materials comprises an annular dielectric elastomer layer 1, a sealing base body layer 2 wrapping the dielectric elastomer layer 1 and a voltage control module 3 connected with the positive electrode and the negative electrode of the dielectric elastomer layer 1. And the capacitive sensing module 4 is electrically connected with the dielectric elastomer layer 1. The dielectric elastomer layer 1 comprises a dielectric elastomer film and flexible electrodes located on the two sides. And the deformation direction of the dielectric elastomer layer 1 is vertical to the sealing contact surface. The sealing base body layer comprises a medium corrosion resistant outer layer 21 on the outer side and an elastic supporting inner layer 22 on the inner side. The method has the beneficial effects that the sealing contact pressure is actively regulated and controlled by applying voltage, dynamic clearance compensation, friction optimization and abrasion monitoring are achieved, the sealing reliability is remarkably improved, the service life is remarkably prolonged, and the energy efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of sealing technology, specifically to an adaptive sealing ring and sealing device made of dielectric elastomer material. Background Technology

[0002] Traditional sealing rings (such as O-rings and lip seals) rely on the material's elasticity for passive sealing, which has drawbacks: they cannot compensate for dynamic wear or thermal deformation; constant contact pressure leads to high frictional losses; and they lack real-time condition monitoring capabilities. The applicant decided to use a new structure based on dielectric elastomers to solve these problems.

[0003] While dielectric elastomers, also known as electroactive polymers (DEAPs), have been studied in existing technologies, they have not yet been maturely applied to active control and sensing integration in sealed structures. DEAPs are a new type of intelligent electroactive polymer that can generate large driving forces and significant shape and volume changes under external electric field stimulation.

[0004] Therefore, there is an urgent need to develop an adaptive sealing ring and sealing device made of dielectric elastomer material that is easy to produce, has high production stability, and low cost. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems.

[0006] Therefore, the first objective of this invention is to propose an adaptive sealing ring made of dielectric elastomer material, which actively regulates the sealing contact pressure by applying voltage, thereby achieving dynamic gap compensation, friction optimization, and wear monitoring; it solves the problem that traditional seals are prone to failure under operating conditions such as pressure fluctuations and temperature changes, and significantly improves sealing reliability, lifespan, and energy efficiency.

[0007] The second objective of this invention is to provide a sealing device.

[0008] To achieve the above objectives, embodiments of the present invention disclose an adaptive sealing ring made of dielectric elastomer material, comprising: an annular dielectric elastomer layer 1, a sealing substrate layer 2 covering the dielectric elastomer layer 1, and a voltage control module 3 connecting the positive and negative electrodes of the dielectric elastomer layer 1.

[0009] In addition, the adaptive sealing ring made of dielectric elastomer material according to the above-described technical solution of this application may also have the following additional technical features: Optionally, it also includes a capacitive sensing module 4 electrically connected to the dielectric elastomer layer 1.

[0010] Optionally, the dielectric elastomer layer 1 includes a dielectric elastomer film and flexible electrodes located on both sides.

[0011] Optionally, the deformation direction of the dielectric elastomer layer 1 is perpendicular to the sealing contact surface.

[0012] Optionally, the sealing substrate layer 2 is a multi-layer composite structure, including an outer layer 21 resistant to media corrosion on the outside and an inner layer 22 with elastic support on the inside.

[0013] Optionally, the sealing substrate layer 2 is silicone.

[0014] Optionally, the voltage control module 3 includes a high-voltage generator and a closed-loop controller.

[0015] To achieve the above objectives, a second aspect of the present invention provides a sealing device comprising: an adaptive sealing ring made of a dielectric elastomer material as described in the first aspect of the present invention.

[0016] Optionally, the sealing device is one of a rotary shaft sealing device, a hydraulic cylinder piston sealing device, or a flange static sealing device.

[0017] The beneficial effects of this invention are as follows: by applying voltage to actively regulate the sealing contact pressure, dynamic gap compensation, friction optimization and wear monitoring are achieved; the problem of traditional seals being prone to failure under working conditions such as pressure fluctuations and temperature changes is solved, and the reliability, life and energy efficiency of the seal are significantly improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an adaptive sealing ring made of dielectric elastomer material provided in one embodiment of this application; Figure 2 This is a schematic diagram of the deformation of an adaptive sealing ring made of dielectric elastomer material according to an embodiment of this application, wherein... Figure 2 (a) is the normal state diagram. Figure 2 (b) is the expansion state diagram; Figure 3 This is a schematic diagram of the structure of an adaptive sealing ring made of dielectric elastomer material provided in another embodiment of this application.

[0019] Figure label: 1-Dielectric elastomer layer, 2-Sealing substrate layer, 21-Outer layer resistant to dielectric corrosion, 22-Inner layer with elastic support, 3-Voltage control module, 4-Capacitive sensing module. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or parts / elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] The adaptive sealing ring made of dielectric elastomer material according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of an adaptive sealing ring made of dielectric elastomer material provided in one embodiment of this application, as shown below. Figure 1 As shown: The adaptive sealing ring of the dielectric elastomer material includes an annular dielectric elastomer layer 1, a sealing substrate layer 2 covering the dielectric elastomer layer 1, and a voltage control module 3 connecting the positive and negative electrodes of the dielectric elastomer layer 1.

[0023] Specifically, the annular dielectric elastomer layer 1 uses a DEAP film and double-sided flexible electrodes to form the core driving unit. By applying voltage to the electrodes, it causes deformation (expansion or contraction), thereby achieving dynamic control of the contact pressure and solving the defects of passive compensation in traditional seals. The sealing substrate layer 2 covers the DEAP layer to provide mechanical support and media isolation, protecting the DEAP layer from mechanical damage and media corrosion, and improving reliability. The voltage control module 3 is connected to the electrodes to realize active voltage input to adjust the size of the dielectric elastomer layer 1, thereby controlling the contact pressure and achieving the sealing of the sealing device.

[0024] It should be noted that the adaptive sealing ring made of dielectric elastomer material in this application is suitable for active sealing solutions in high-precision, variable operating conditions, or energy-saving scenarios.

[0025] The adaptive sealing ring made of dielectric elastomer material according to this application actively regulates the sealing contact pressure by applying voltage, thereby achieving dynamic gap compensation, friction optimization, and wear monitoring. This solves the problem of traditional seals being prone to failure under pressure fluctuations and temperature changes, significantly improving sealing reliability, lifespan, and energy efficiency.

[0026] According to one embodiment of this application, a capacitive sensing module 4 electrically connected to the dielectric elastomer layer 1 is also included.

[0027] Specifically, the capacitance sensing module 4 monitors the capacitance change of the DEAP layer in real time, calculates the sealing contact pressure, wear amount or medium permeation state in real time by the capacitance value change of the dielectric elastomer layer 1, and warns of lifespan by the capacitance change rate caused by wear, providing data support for closed-loop control and optimizing energy consumption and sealing performance.

[0028] According to one embodiment of this application, the dielectric elastomer layer 1 includes a dielectric elastomer film and flexible electrodes located on both sides.

[0029] Specifically, the flexible electrode of dielectric elastomer layer 1 is used to introduce voltage, and the dielectric elastomer film expands and deforms after being subjected to voltage. Furthermore, the annular sealing ring composed of multiple layers of dielectric elastomer film can increase the deformation range of the sealing ring.

[0030] According to one embodiment of this application, Figure 2 This is a schematic diagram illustrating the deformation of an adaptive sealing ring made of dielectric elastomer material, provided in one embodiment of this application. Figure 2 (a) is the normal state diagram. Figure 2 (b) is the expansion state diagram, such as Figure 2 As shown, the deformation direction of the dielectric elastomer layer 1 is perpendicular to the sealing contact surface.

[0031] Specifically, such as Figure 2 As shown, Figure 2 (b) After being energized, the dielectric elastomer expands and deforms to both sides, and the expansion and deformation to both sides is converted into radial pressure changes of the sealing ring and the structure connected to it, so as to precisely control the sealing interface.

[0032] According to one embodiment of this application, Figure 3 This is a schematic diagram of the structure of an adaptive sealing ring made of dielectric elastomer material provided in another embodiment of this application, as shown below. Figure 3 As shown, the sealing substrate layer 2 is a multi-layer composite structure, including an outer layer 21 resistant to media corrosion on the outside and an inner layer 22 with elastic support on the inside.

[0033] According to one embodiment of this application, the sealing substrate layer 2 is silicone.

[0034] Specifically, the sealing substrate layer 2 can be entirely made of silicone; or it can be divided into two layers, with the inner elastic support layer 22 made of silicone and an outer layer 21 resistant to media corrosion on the outside to prevent corrosion. The outer layer 21 resistant to media corrosion can be made of polytetrafluoroethylene (PTFE).

[0035] According to one embodiment of this application, the voltage control module 3 includes a high-voltage generator and a closed-loop controller.

[0036] Specifically, a high-voltage generator is used to provide voltage to the dielectric elastomer layer 1, driving the dielectric elastomer layer 1 to deform; the closed-loop controller dynamically adjusts the voltage based on capacitor feedback to reduce the leakage rate. According to a simulation experiment conducted by the applicant, the leakage rate was reduced by 40%.

[0037] Based on the above embodiments, this invention also proposes a sealing device, including: an adaptive sealing ring made of a dielectric elastomer material as described in the above embodiments.

[0038] According to one embodiment of this application, the sealing device is one of a rotary shaft sealing device, a hydraulic cylinder piston sealing device, or a flange static sealing device.

[0039] According to a sealing device of the present invention, dynamic gap compensation, friction optimization, and wear monitoring are achieved by actively regulating the sealing contact pressure through the application of voltage. This solves the problem of traditional seals being prone to failure under conditions such as pressure fluctuations and temperature changes, and significantly improves sealing reliability, lifespan, and energy efficiency.

[0040] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. An adaptive sealing ring made of dielectric elastomer material, characterized in that, include: The annular dielectric elastomer layer (1), the sealing substrate layer (2) covering the dielectric elastomer layer (1), and the voltage control module (3) connecting the positive and negative electrodes of the dielectric elastomer layer (1).

2. The adaptive sealing ring made of dielectric elastomer material according to claim 1, characterized in that: It also includes a capacitive sensing module (4) electrically connected to the dielectric elastomer layer (1).

3. The adaptive sealing ring made of dielectric elastomer material according to claim 1, characterized in that: The dielectric elastomer layer (1) includes a dielectric elastomer film and flexible electrodes located on both sides.

4. The adaptive sealing ring made of dielectric elastomer material according to claim 1, characterized in that: The deformation direction of the dielectric elastomer layer (1) is perpendicular to the sealing contact surface.

5. The adaptive sealing ring made of dielectric elastomer material according to claim 1, characterized in that: The sealing substrate layer (2) is a multi-layer composite structure, including an outer layer (21) resistant to media corrosion on the outside and an inner layer (22) elastic support on the inside.

6. The adaptive sealing ring made of dielectric elastomer material according to claim 1, characterized in that: The sealing substrate layer (2) is silicone.

7. The adaptive sealing ring made of dielectric elastomer material according to claim 1, characterized in that: The voltage control module (3) includes a high voltage generator and a closed-loop controller.

8. A sealing device, characterized in that: Including an adaptive sealing ring made of a dielectric elastomer material as described in any one of claims 1-7.

9. A sealing device according to claim 8, characterized in that: The sealing device is one of the following: a rotary shaft sealing device, a hydraulic cylinder piston sealing device, or a flange static sealing device.

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