Air inlet and outlet rubber ring structure for connecting rod fan

Abstract

The utility model discloses an air inlet and outlet rubber ring structure for a connecting rod fan, which comprises a circular rubber ring, a boss structure for reducing resistance and a conical surface structure for positioning the rubber ring are respectively arranged on the end surfaces of the two sides of the rubber ring, and the boss structure and the conical surface structure are concentric. Air flow is guided to flow along a better path, turbulent flow and friction loss are reduced, meanwhile, the boss is in tight contact with the air inlet and outlet end cover through radial elastic deformation generated when the boss is pressed, and the sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing structures for connecting rod fans, and more particularly to an inlet and outlet rubber ring structure for connecting rod fans. Background Technology

[0002] Membrane aerators are mainly used in small air conveying fans, with applications including rural sewage treatment, aquaculture, and air supply for precision electronic instruments. Traditional connecting rod blowers rely on two pairs of rubber rings operating in opposite directions for air intake and exhaust, requiring one pair to be open while the other is completely closed to achieve a seal. However, existing rubber rings, due to their simple structure, suffer from the following problems:

[0003] The high frictional resistance during opening and closing leads to increased energy consumption; insufficient sealing makes it prone to air leakage under high pressure; and the rubber is prone to fatigue deformation after long-term use, affecting its lifespan. To address these issues, this application proposes a solution. Summary of the Invention

[0004] Purpose of the utility model: The purpose of this utility model is to provide an inlet and outlet rubber ring structure for a connecting rod fan, which can reduce the resistance of air intake and exhaust, improve the sealing performance of the rubber ring, and extend its service life.

[0005] Technical solution: The present invention discloses an inlet and outlet rubber ring structure for a connecting rod fan, comprising a circular rubber ring, wherein a boss structure for reducing resistance and a conical surface structure for positioning the rubber ring are respectively provided on the end faces of both sides of the rubber ring, and the boss structure and the conical surface structure are concentric.

[0006] By designing the boss structure, the airflow is guided to flow along a better path, reducing turbulence and friction loss. At the same time, the radial elastic deformation generated by the pressure of the boss forms a tight contact with the inlet and outlet end caps, improving the sealing performance. After the rubber ring is installed into the groove of the inlet and outlet end caps using the conical structure, the rubber ring is positioned to achieve the alignment of the boss and the groove.

[0007] Preferably, the diameter of the rubber ring is larger than the diameter of the groove on the inlet and outlet end caps, and when the rubber ring is installed on the groove on the inlet and outlet end caps, it is completely attached to the end face of the inlet and outlet end caps circumferentially around the groove.

[0008] The design of the rubber ring perfectly fitting the end face of the circumferential inlet and outlet caps of the groove provides an extra layer of sealing performance.

[0009] Preferably, the boss structure is a cylindrical protrusion, and the cylindrical protrusion is concentric with the rubber ring.

[0010] Preferably, the height of the boss structure is between 1.2 and 1.5 times the thickness of the rubber ring.

[0011] Preferably, the diameter of the boss structure is between one-third and one-half the diameter of the rubber ring.

[0012] The design of the height and diameter of the boss structure meets the requirement of guiding the airflow along an optimized path, reducing turbulence and friction loss. At the same time, the boss structure expands to both sides when the boss is under pressure, and fits tightly with the groove of the inlet and outlet end caps to achieve a second seal.

[0013] Preferably, the conical structure includes a connecting column and a frustum. One end of the connecting column is connected to the end face of the rubber ring, and the other end is connected to the large-area end face of the frustum. When the rubber ring is installed on the inlet and outlet end caps in the fan, the small-area end face of the frustum faces the groove in the inlet and outlet end caps. The frustum matches the groove in the inlet and outlet end caps.

[0014] The conical structure design enables the rubber ring to be positioned within the groove when it is installed into the inlet / outlet end cap.

[0015] Preferably, the connecting column, the frustum, and the rubber ring are concentric.

[0016] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0017] This invention guides airflow along a better path through the design of the boss structure, reducing turbulence and friction loss. At the same time, the radial elastic deformation generated by the pressure of the boss forms a tight contact with the inlet and outlet end caps, improving the sealing performance. Attached Figure Description

[0018] Figure 1 This is a front view of the present invention.

[0019] Figure 2 This is a frontal perspective view of the present invention.

[0020] Figure 3 This is a rear perspective view of the present invention.

[0021] Figure 4 This is an assembly diagram showing the effect of this utility model when it is mounted on the air inlet and outlet end caps.

[0022] The components include: 1. Rubber ring; 2. Boss structure; 3. Conical structure; 4. Inlet and outlet end caps; 5. Connecting column; 6. Frustum; 7. Groove. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0024] Example 1:

[0025] See appendix Figures 1-4 The figure shows the inlet and outlet rubber ring structure for the connecting rod fan of this utility model, which includes a circular rubber ring 1. On the end faces of both sides of the rubber ring 1, there are respectively a boss structure 2 for reducing resistance and a conical surface structure 3 for positioning the rubber ring 1. At the same time, the boss structure 2 and the conical surface structure 3 are concentric.

[0026] By designing the boss structure 2, the airflow is guided to flow along a better path, reducing turbulence and friction loss. At the same time, the radial elastic deformation generated by the boss structure 2 under pressure forms a tight contact with the inlet and outlet end caps 4, improving the sealing performance. After the rubber ring 1 is installed into the groove 7 of the inlet and outlet end caps 4 using the conical structure 3, the rubber ring 1 is positioned to achieve the alignment of the boss structure 2 and the groove 7.

[0027] In this embodiment, the diameter of the rubber ring 1 is larger than the diameter of the groove 7 on the inlet / outlet end cap 4. When the rubber ring 1 is installed on the groove 7 on the inlet / outlet end cap 4, it is completely attached to the end face of the inlet / outlet end cap 4 around the groove 7. The design that the rubber ring 1 is completely attached to the end face of the inlet / outlet end cap 4 around the groove 7 provides a layer of sealing performance.

[0028] In this embodiment, the boss structure 2 is a cylindrical protrusion, which is concentric with the rubber ring 1. The height of the boss structure 2 is between 1.2 and 1.5 times the thickness of the rubber ring 1, and the diameter of the boss structure 2 is between one-third and one-half of the diameter of the rubber ring 1. This design achieves the requirement of guiding the airflow along an optimized path, reducing turbulence and friction loss. At the same time, the boss structure 2 expands to both sides when it is under pressure, and fits tightly with the groove 7 of the air inlet and outlet end cap 4 to achieve a second seal.

[0029] In this embodiment, the conical structure 3 includes a connecting column 5 and a frustum 6. The connecting column 5, the frustum 6, and the rubber ring 1 are concentric. One end of the connecting column 5 is connected to the end face of the rubber ring 1, and the other end is connected to the large-area end face of the frustum 6. When the rubber ring 1 is installed on the inlet / outlet end cover 4 in the fan, the small-area end face of the frustum 6 faces the groove 7 in the inlet / outlet end cover 4. At the same time, the frustum 6 matches the groove 7 in the inlet / outlet end cover 4. The design of the conical structure 3 realizes the positioning of the rubber ring 1 in the groove 7 when it is installed in the inlet / outlet end cover 4, so that after the rubber ring 1 is installed in the groove 7 of the inlet / outlet end cover 4, the boss structure 2 is aligned with the groove 7.

[0030] Example 2:

[0031] During operation, the opening and closing state of rubber ring 1 is controlled by the reciprocating motion of the linkage mechanism:

[0032] During the closing phase, the boss structure 2 expands to both sides under pressure and fits tightly with the groove 7 of the air inlet and outlet end cap 4 to form a first seal. At the same time, the rubber ring 1 fits completely with the end face of the air inlet and outlet end cap 4 around the groove 7, providing a second seal. The double seal improves the overall sealing performance.

[0033] During the opening phase, the boss structure 2 elastically resets and guides the airflow smoothly, reducing local resistance.

[0034] Example 3:

[0035] Taking a certain model of diaphragm aerator as an example, high-elasticity, wear-resistant nitrile rubber is used. After the rubber ring 1 is prepared by compression molding, it is embedded into the groove 7 of the inlet and outlet end cap 4, ensuring that the boss structure 2 is aligned with the groove 7. The inlet and outlet end caps are fixed to the blower body with bolts, and the preload is controlled at 5-8 N·m to avoid excessive compression and plastic deformation. The height of the boss structure 2 is selected as 1 mm. After testing, it was found that:

[0036] In terms of sealing, there was no leakage under a pressure of 25 kPa;

[0037] Airflow resistance: reduced by 25%-30% compared to traditional structures;

[0038] Service life: No significant wear was observed after 5000 hours of continuous operation.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An inlet and outlet rubber ring structure for a connecting rod fan, comprising a circular rubber ring, characterized in that: The end faces on both sides of the rubber ring are respectively provided with a boss structure for reducing resistance and a conical surface structure for positioning the rubber ring, and the boss structure and the conical surface structure are concentric.

2. The inlet and outlet rubber ring structure for a connecting rod fan according to claim 1, characterized in that: The diameter of the rubber ring is larger than the diameter of the groove on the air inlet and outlet end caps. When the rubber ring is installed on the groove on the air inlet and outlet end caps, it is completely attached to the end face of the air inlet and outlet end caps circumferentially around the groove.

3. The inlet and outlet rubber ring structure for a connecting rod fan according to claim 1, characterized in that: The boss structure is a cylindrical protrusion, which is concentric with the rubber ring.

4. The inlet and outlet rubber ring structure for a connecting rod fan according to claim 1, characterized in that: The height of the boss structure is between 1.2 and 1.5 times the thickness of the rubber ring.

5. The inlet and outlet rubber ring structure for a connecting rod fan according to claim 1, characterized in that: The diameter of the boss structure is between one-third and one-half the diameter of the rubber ring.

6. The inlet and outlet rubber ring structure for a connecting rod fan according to claim 1, characterized in that: The conical structure includes a connecting column and a frustum. One end of the connecting column is connected to the end face of the rubber ring, and the other end is connected to the large-area end face of the frustum. When the rubber ring is installed on the inlet and outlet end caps in the fan, the small-area end face of the frustum faces the groove in the inlet and outlet end caps. The frustum matches the groove in the inlet and outlet end caps.

7. The inlet and outlet rubber ring structure for a connecting rod fan according to claim 6, characterized in that: The connecting column, frustum, and rubber ring are concentric.

Images