An intake check valve structure for an automotive air supply unit

Abstract

This utility model discloses an intake one-way valve structure for an automotive air supply unit, including an intake valve body with an intake channel having an inlet and an outlet. A sealing ball is positioned at the outlet of the intake channel, and a limiting vent seat is positioned on the side of the sealing ball furthest from the outlet. The sealing ball floats between the limiting vent seat and the intake channel. The limiting vent seat has a central limiting structure. When air enters the intake channel, the sealing ball cooperates with the central limiting structure to remain in the center of the limiting vent seat. Using a sealing ball as a sealing component provides good flexibility and prevents sealing misalignment. Simultaneously, the limiting vent seat confines the sealing ball to the vicinity of the intake channel outlet, facilitating rapid sealing of the intake channel during pressure build-up. This utility model solves the problem that existing intake one-way valves in air supply units cannot guarantee smooth airflow and effective sealing.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive air supply units, specifically to an intake one-way valve structure for an automotive air supply unit. Background Technology

[0002] As automotive comfort requirements gradually increase, air suspension has developed rapidly, and electronic product designs are becoming more modular and miniaturized. Closed air supply units need to operate in open conditions, drawing air from the outside into the entire air spring system. To maintain pressure after air is drawn in, an intake check valve structure is required at the air inlet. Existing end-face sealed check valves are prone to jamming during use. On the one hand, this can easily affect the smoothness of air intake to the air supply unit, and on the other hand, it can fail to effectively seal the air outlet of the intake valve when pressure is built up inside the air supply unit, thus posing a risk of leakage to the air supply unit. Utility Model Content

[0003] This invention provides an intake check valve structure for an automotive air supply unit, which can solve the problem that existing intake check valves in air supply units cannot guarantee smooth airflow and effective sealing.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an intake one-way valve structure for an automotive air supply unit, comprising an intake valve body, an intake channel having an intake port and an outlet, a sealing ball being positioned at the outlet of the intake channel, and a limiting vent seat being positioned on the side of the sealing ball away from the outlet. The sealing ball floats between the limiting vent seat and the intake channel, and the limiting vent seat has a central limiting structure. When air enters the intake channel, the sealing ball and the... The centered limiting structure is positioned in the middle of the limiting vent seat. Using a sealing ball as the sealing component, it has good flexibility and will not have the problem of seal misalignment. At the same time, the limiting vent seat restricts the sealing ball to the vicinity of the air outlet of the air intake channel, which facilitates the quick sealing of the air intake channel when pressure is built up. The centered limiting structure on the limiting vent seat can keep the sealing ball in the middle position when air is intake, so that the airflow can pass fully around the sealing ball. The sealing ball will not disturb the airflow of the intake and will not make noise.

[0005] Preferably, the central limiting structure includes a central hole in the middle of the limiting vent seat and a guide concave surface centered on the central hole on the end face of the limiting vent seat facing the plugging ball. The central hole can not only limit the plugging ball in the middle, but also allow the plugging ball to smoothly detach from the limiting vent seat during pressure build-up.

[0006] Preferably, the limiting vent seat is provided with multiple bottom vents around the central hole, which can improve the smoothness of the intake airflow through the limiting vent seat.

[0007] Preferably, the limiting vent seat is in the shape of a thin sheet and is snapped into the air intake groove on the valve block of the automotive air supply unit, which makes it easy to install directly on the existing valve block without modifying the existing air intake valve body.

[0008] Preferably, the edge of the limiting vent seat is provided with multiple connecting posts extending towards the intake valve body around the circumference, and side vents are formed between adjacent connecting posts. The connecting posts are connected to the intake port of the intake channel and surround the sealing ball inside. The connecting posts can surround the sealing ball, which can not only limit the range of the sealing ball, but also eliminate the need for valve block installation and can be directly integrated with the intake valve body.

[0009] Preferably, the inner wall of the connecting column is provided with limiting ribs, and the sealing ball is limited in the area between the limiting ribs. The limiting ribs can not only strengthen the connecting column, but also guide the position of the sealing ball.

[0010] Preferably, the guide concave surface is a conical surface with a conical angle of 13-16°.

[0011] Preferably, the air outlet of the air intake channel is provided with a conical sealing part that matches the sealing ball, which can improve the sealing performance.

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

[0013] With a simple structure, it uses a sealing ball as the sealing component, which has good flexibility and will not cause the problem of seal misalignment. At the same time, the sealing ball is restricted to the vicinity of the air outlet of the air inlet channel by the limiting vent seat, which facilitates the quick sealing of the air inlet channel when pressure is built up. The central limiting structure on the limiting vent seat can keep the sealing ball in the center position when air is inlet, so that the airflow can pass fully around the sealing ball. The sealing ball will not disturb the airflow and will not make noise. Attached Figure Description

[0014] Figure 1 This is a perspective structural diagram of the first embodiment of the present utility model;

[0015] Figure 2 This is a front sectional view of the first embodiment of the present invention;

[0016] Figure 3 This is a three-dimensional structural diagram of the limiting vent seat according to the first embodiment of the present utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the limiting vent seat according to the first embodiment of the present utility model;

[0018] Figure 5 This is a cross-sectional view of the second embodiment of the present invention.

[0019] Figure label:

[0020] 1. Intake valve body; 2. Limiting vent seat; 21. Center hole; 22. Guide concave surface; 23. Bottom vent; 24. Connecting column; 25. Side vent; 26. Limiting rib; 3. Sealing ball; 4. Intake channel; 5. Conical sealing part; 6. Intake groove. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] like Figure 1-5 As shown, this utility model provides the following technical solution to solve the problem that the existing one-way valve for air supply units cannot guarantee the smoothness of air intake and the effectiveness of sealing: An air intake one-way valve structure for an automotive air supply unit includes an intake valve body 1, on which an intake channel 4 is provided. The intake channel 4 has an air inlet and an air outlet. A sealing ball 3 is provided at the air outlet of the intake channel 4. A limiting vent seat 2 is provided on the side of the sealing ball 3 away from the outlet. The sealing ball 3 floats between the limiting vent seat 2 and the intake channel 4. The limiting vent seat 2 has a central limiting structure. When air enters the intake channel 4, the sealing ball 3 cooperates with the central limiting structure to remain in the middle of the limiting vent seat 2. After using the sealing ball 3 as a sealing component, its spherical structure has multi-directional degrees of freedom. Compared with the rigid structure of traditional end face sealing, it can avoid jamming caused by assembly errors or vibration, and ensure accurate sealing position. The limiting vent seat 2 restricts the movement range of the sealing ball to within 5mm around the air outlet of the air inlet channel. During pressure build-up, the sealing ball 3 can respond to pressure changes and complete the seal within 0.05 seconds, which is a significant improvement in response speed compared to traditional structures. The centrally positioned limiting structure keeps the sealing ball stable in the center during air intake, allowing airflow to pass evenly from all sides, reducing the airflow disturbance coefficient, controlling the noise level below 45dB, and significantly improving air intake efficiency.

[0023] The sealing ball 3 is a softer and lighter structure than the limiting vent seat 2 and the air intake valve body 1. When outside air is drawn into the system, the sealing ball 3 fits against the limiting vent seat 2 without obstruction. When the system is pressurized, the sealing ball 3 can be blown by the internal pressurized gas and cooperate with the air outlet of the air intake channel 4 to seal.

[0024] In this embodiment, the intake valve body 1 is made of PA6 + 30% glass fiber material, and the intake channel diameter is 10mm. The sealing ball is a silicone ball with a diameter of 6mm and a density of 0.9g / cm³. 3 This design ensures lightweight and elasticity. The limiting vent seat 2 is made of PP material with a thickness of 5mm, and its distance from the air outlet of the air inlet channel 4 is 8mm. When the air inlet pressure is 0.2MPa, the sealing ball 3 is pushed to the limiting vent seat 2 by the airflow and remains centered through the centering structure. The airflow passes through the gap between the sealing ball and the limiting vent seat and the vent hole, with a flow rate of 150L / min. When the system pressure rises to 0.3MPa, the sealing ball detaches from the limiting vent seat under the action of air pressure and seals with the air outlet of the air inlet channel within 0.05 seconds, with a leakage rate of <0.01L / min.

[0025] In this embodiment, the centering limiting structure includes a central hole 21 in the middle of the limiting vent seat 2 and a guide concave surface 22 centered on the central hole 21 on the end face of the limiting vent seat 2 facing the sealing ball 3. The central hole 21, on the one hand, provides radial constraint to the sealing ball 3 through its diameter limitation, preventing it from shifting to the edge; on the other hand, during pressure build-up, the airflow can directly act on the back of the sealing ball 3 through the central hole 21, pushing it to quickly detach from the limiting vent seat 2. The guide concave surface 22 provides circumferential support for the sealing ball, allowing the airflow to flow along the tangent of the concave surface, reducing turbulence (airflow resistance reduced by 25%), and simultaneously ensuring automatic centering of the sealing ball during air intake through the inclined guide surface. Specifically, the central hole 21 has a diameter of 4mm and rounded edges to avoid noise caused by airflow impact. The guide concave surface 22 is a conical surface with a cone angle of 13-16°, radially distributed with the central hole 21 as the center, and a cone height of 2mm, forming a smooth transition with the end face of the limiting vent seat 2. During air intake, the airflow along the conical surface generates a centripetal force, stabilizing the sealing ball directly in front of the central hole and ensuring uniform airflow distribution around it.

[0026] In this embodiment, the limiting vent seat 2 is provided with a plurality of bottom vent holes 23 around the central hole 21. The bottom vent holes 23 are evenly distributed around the central hole 21 to form an annular airflow channel, which fits with the gap around the sealing ball to increase the air intake flow.

[0027] As one embodiment of the use of the limiting vent seat 2, such as Figure 5As shown, the limiting vent seat 2 is a thin sheet that snaps into the air intake groove 6 on the valve block of the automotive air supply unit. This allows for direct installation onto existing valve blocks without modifying the existing intake valve body 1. The thin sheet-like limiting vent seat 2 is installed in the valve block's air intake groove 6 via a snap-fit ​​structure, eliminating the need for machining (such as drilling or tapping) of the existing intake valve body. The snap-fit ​​clearance is controlled at 0.1-0.2mm to ensure the limiting vent seat remains secure and facilitates future maintenance and replacement. The limiting vent seat 2 can be made of fiberglass, 4-5mm thick, with three elastic claws on the edge for an interference fit with the valve block's air intake groove 6. After installation, the flatness error of the limiting vent seat is <0.1mm, ensuring a uniform fit clearance with the sealing ball. This design is suitable for upgrading existing air supply unit valve blocks and is compatible with mainstream valve block models.

[0028] As another embodiment of the use of the limiting vent seat 2, such as Figure 1-4 As shown, multiple connecting posts 24 extending towards the intake valve body 1 are arranged around the edge of the limiting vent seat 2. Side vent holes 25 are formed between adjacent connecting posts 24. The connecting posts 24 connect to the intake port of the intake channel 4 and surround the sealing ball 3 inside. The connecting posts 24 surround the sealing ball 3, not only limiting its range but also eliminating the need for a valve block for installation; they can be directly integrated with the intake valve body 1. Specifically, the connecting posts 24 consist of three 10mm high posts, equidistantly distributed (120° spacing) along the edge of the limiting vent seat, forming three side vent holes. The ends of the connecting posts 24 are fitted to the stepped surface of the intake port of the intake channel 4 and fixed by ultrasonic welding (welding strength > 50N), completely surrounding the sealing ball 3 within the internal space, ensuring it can only float axially with a floating stroke of 3mm.

[0029] In addition, the inner wall of the connecting column 24 is provided with limiting ribs 26. The sealing ball 3 is limited within the area between the limiting ribs 26. The limiting ribs 26 not only strengthen the connecting column 24, but also guide the position of the sealing ball 3. There are three limiting ribs 26, which extend axially along the inner wall of the connecting column 24 to form a limiting area with a diameter of 6.5 mm. The sealing ball 3 has a diameter of 6 mm. When the sealing ball is radially displaced due to vibration, the ribs can quickly guide it back to the center area, ensuring that the centering accuracy during air intake is <0.2 mm and the sealing alignment error during pressure build-up is <0.1 mm.

[0030] Meanwhile, the air outlet of the air intake channel 4 is provided with a conical sealing part 5 that matches the sealing ball 3, which can improve the sealing performance.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An intake one-way valve structure for an automotive air supply unit, comprising an intake valve body (1), wherein the intake valve body (1) is provided with an intake channel (4), the intake channel (4) having an intake port and an outlet, characterized in that, A blocking ball (3) is provided at the air outlet of the air intake channel (4). A limiting vent seat (2) is provided on the side of the blocking ball (3) away from the outlet. The blocking ball (3) floats between the limiting vent seat (2) and the air intake channel (4). The limiting vent seat (2) has a central limiting structure. When air enters the air intake channel (4), the blocking ball (3) cooperates with the central limiting structure to remain in the middle of the limiting vent seat (2).

2. The intake check valve structure of the automotive air supply unit according to claim 1, characterized in that: The central limiting structure includes a central hole (21) in the middle of the limiting vent seat (2) and a guide concave surface (22) centered on the central hole (21) on the end face of the limiting vent seat (2) facing the sealing ball (3).

3. The intake check valve structure of the automotive air supply unit according to claim 2, characterized in that: The limiting vent seat (2) is provided with a plurality of bottom vent holes (23) around the central hole (21).

4. The intake check valve structure of the automotive air supply unit according to claim 3, characterized in that: The limiting vent seat (2) is in the shape of a thin sheet and is snapped into the air inlet groove (6) on the valve block of the automobile air supply unit.

5. The intake check valve structure of the automotive air supply unit according to claim 3, characterized in that: The edge of the limiting vent seat (2) is provided with multiple connecting posts (24) extending towards the air intake valve body (1) around the circumference. Side vent holes (25) are formed between adjacent connecting posts (24). The connecting posts (24) are connected to the air intake of the air intake channel (4) and surround the sealing ball (3) inside.

6. The intake check valve structure of the automotive air supply unit according to claim 5, characterized in that, The inner wall of the connecting column (24) is provided with limiting ribs (26), and the sealing ball (3) is limited within the area between the limiting ribs (26).

7. The intake check valve structure of the automotive air supply unit according to claim 2, characterized in that: The guide concave surface (22) is a conical surface with a conical angle of 13-16°.

8. The intake check valve structure of the automotive air supply unit according to claim 1, characterized in that: The air outlet of the air inlet channel (4) is provided with a conical sealing part (5) that matches the sealing ball (3).

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