Leakage-proof sealing ring structure

Abstract

The utility model relates to the technical field of sealing rings, in particular to an anti-leakage sealing ring structure, which enhances the sealing performance and greatly prolongs the service life. Comprising a waterproof sleeve, a sealing ring and a fixed base, the sealing ring is composed of double layers of axial seals, a groove is formed in the middle of the sealing ring, the sealing ring is sleeved on the fixed base, the waterproof sleeve is inserted on the fixed base, and the sealing ring is located between the waterproof sleeve and the fixed base.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing ring, in particular to a leakproof sealing ring structure. BACKGROUND

[0002] With the increasingly high energy saving and environmental protection requirements, as the key power source, the pump must also meet the high efficiency, low energy consumption standard. The water pump is a mechanical device for conveying liquid or pressurizing liquid. It transmits mechanical energy or other external energy to the liquid, so that the liquid energy increases, and is mainly used for conveying liquid including water, oil, acid and alkali liquid, emulsion, suspension emulsion and liquid metal, etc. O-ring is needed in use. The O-ring is usually made of elastic materials such as rubber. During installation, the O-ring will be placed in the sealing groove and be compressed to a certain extent. Due to the elasticity of rubber, this compression will cause the O-ring to produce elastic deformation, so that it is tightly attached to the sealing surface (such as the groove wall and the surface of the part cooperating with it). For example, the prior art publication No. CN204900952U proposes an O-ring, which comprises a flexible ring body made of silica gel material, and the cross-sectional shape of the flexible ring body is circular. The ratio of the outer diameter of the flexible ring body to the cross-sectional diameter of the flexible ring body is greater than or equal to 42.

[0003] Elastic deformation leads to contact stress between the O-ring and the sealing surface. This contact stress will form a closed interface between the sealing surface and the O-ring, preventing the leakage of fluid (liquid or gas). The size of the contact stress is related to the material properties of the O-ring, the compression amount and other factors. Generally speaking, appropriate increase of the compression amount can increase the contact stress, thereby enhancing the sealing effect, but excessive compression amount may cause damage or accelerated aging of the O-ring. In the actual assembly process, when the reasonable compression amount and O-ring filling rate are designed, leakage phenomenon still occurs, because there are coaxial tolerance between the two parts to be sealed during assembly, stress deformation of the parts, thermal deformation of the parts, etc., which leads to different compression amount and filling rate from the design, especially when the parts are plastic parts or thin-walled parts. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a leakproof sealing ring structure which enhances the sealing performance and greatly prolongs the service life.

[0005] The utility model discloses a leakproof sealing ring structure, including waterproof sleeve, sealing ring and fixed base, and sealing ring is composed of double -deck axial seal, and the middle of sealing ring is provided with the groove, and sealing ring is sleeved on the fixed base, and waterproof sleeve is inserted on the fixed base, and sealing ring is located between waterproof sleeve and fixed base, adopt double -deck seal, and the groove that sets up between sealing ring can guarantee that sealing ring does not move and deform because of stress in the work, leads to the failure of sealing, after assembling, the both sides of sealing ring groove all occur elastic deformation, compared with single O ring, double -deck sealing ring has enhanced the leakproofness very well, even when unilateral failure, the other side still can guarantee the sealing effect, thereby greatly prolongs the working life.

[0006] Preferably, the mounting position of the fixed base is provided with a boss matched with the groove; during assembly, the groove in the middle of the sealing ring is fixedly matched with the boss to fix the position of the sealing ring, and after assembly, the both sides of the sealing ring groove are elastically deformed.

[0007] Preferably, the inner wall of the waterproof sleeve is provided with a positioning convex ring; when the waterproof sleeve is connected with the fixed base, the positioning convex ring on the inner wall of the waterproof sleeve is located on the side of the sealing ring away from the fixed base to limit the sealing ring.

[0008] Compared with the prior art, the utility model has the beneficial effects that: double -deck seal is adopted, and the groove set between the sealing rings can guarantee that the sealing ring does not move and deform due to stress in the work, leading to the failure of sealing, after assembly, the both sides of the sealing ring groove are elastically deformed, compared with single O ring, double -deck sealing ring has enhanced the leakproofness very well, even when unilateral failure, the other side still can guarantee the sealing effect, thereby greatly prolongs the working life. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is the structure schematic diagram after assembly;

[0010] Figure 2 is the explosion map when assembling;

[0011] Figure 3 is the cross section structure schematic diagram after assembly;

[0012] Figure 4 is the appearance structure schematic diagram of sealing ring;

[0013] Figure 5 is the structure schematic diagram of sealing ring installation on fixed base;

[0014] Figure 6 is the structure schematic diagram of sealing ring installation on waterproof sleeve;

[0015] Figure 7 is the cross section structure schematic diagram;

[0016] The attached diagram is labeled as follows: 1. Waterproof sleeve; 2. Sealing ring; 3. Fixed base; 4. Boss; 5. Groove; 6. Positioning protrusion. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0018] like Figures 1 to 7 As shown, the sealing ring 2 is composed of a double-layer axial seal. The sealing ring 2 has a groove 5 in the middle. The sealing ring 2 is fitted onto the fixed base 3. The water-proof sleeve 1 is inserted into the fixed base 3. The sealing ring 2 is located between the water-proof sleeve 1 and the fixed base 3. The fixed base 3 has a boss 4 at the installation position. The boss 4 matches the groove 5. The inner wall of the water-proof sleeve 1 is provided with a positioning protrusion ring 6.

[0019] During assembly, the groove 5 in the middle of the sealing ring 2 is fixedly engaged with the boss 4 to fix the position of the sealing ring 2. When the water-proof sleeve 1 is connected to the fixed base 3, the positioning protrusion 6 on the inner wall of the water-proof sleeve 1 is located on the side of the sealing ring 2 away from the fixed base 3 to limit the sealing ring 2. After assembly, both sides of the groove of the sealing ring undergo elastic deformation. Compared with a single O-ring, the double-layer sealing ring greatly enhances the sealing performance. Even if one side fails, the other side can still ensure the sealing effect.

[0020] like Figures 1 to 7 As shown, the present invention provides a leak-proof sealing ring structure. During assembly, the groove 5 in the middle of the sealing ring 2 is fixedly engaged with the boss 4 to fix the position of the sealing ring 2. After assembly, both sides of the groove of the sealing ring undergo elastic deformation. Compared with a single O-ring, the double-layer sealing ring greatly enhances the sealing performance. Even if one side fails, the other side can still ensure the sealing effect, thereby greatly extending the service life.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A leak-proof sealing ring structure, characterized in that, It includes a water-proof sleeve (1), a sealing ring (2) and a fixed base (3). The sealing ring (2) is composed of a double-layer axial seal. A groove (5) is provided in the middle of the sealing ring (2). The sealing ring (2) is fitted on the fixed base (3). The water-proof sleeve (1) is inserted into the fixed base (3). The sealing ring (2) is located between the water-proof sleeve (1) and the fixed base (3).

2. The leak-proof sealing ring structure as described in claim 1, characterized in that, The mounting position of the fixed base (3) is provided with a boss (4), which matches the groove (5).

3. The leak-proof sealing ring structure as described in claim 1, characterized in that, The inner wall of the water-proof sleeve (1) is provided with a positioning protrusion (6).

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