A radial displacement preventing air release valve

Abstract

The utility model discloses a kind of air release valves of preventing radial displacement, including shell, coil assembly is arranged in the shell, static core is arranged in the coil assembly, sliding sleeve is arranged on the static core, sliding cavity is formed on the sliding sleeve, and dynamic core is slidably arranged on the sliding cavity;Sliding sleeve is formed with one through air groove, and the outer periphery of dynamic core is formed with several air grooves, and the air groove is spirally arranged.

Description

Technical Field

[0001] This utility model relates to the field of vent valve technology, specifically to a vent valve that prevents radial displacement. Background Technology

[0002] Turbocharging technology is one of the key technologies for improving the power and efficiency of modern internal combustion engines. It works by driving a turbine at the exhaust end of the engine, which in turn drives a coaxial compressor to pre-compress the intake air, thereby increasing the air density entering the cylinder and making the fuel burn more completely, thus improving the engine's power output.

[0003] To protect the turbocharger and intake system components from high-pressure damage and maintain stable turbine speed, a pressure relief valve is typically installed in the turbocharging system. The basic working principle of a conventional electromagnetic turbocharger electronically controlled pressure relief valve is as follows: A moving iron core and a stationary iron core are housed within the valve body. An electromagnetic coil is wound around the outside of the stationary iron core. When the coil is energized, the generated electromagnetic force drives the moving iron core upwards against the spring force, causing the sealing ring connected to it to move away from the valve seat, thereby opening the pressure relief passage and releasing the high-pressure gas. When the coil is de-energized, the electromagnetic force disappears, and the moving iron core moves downwards under the action of the spring's restoring force, causing the sealing ring to press against the valve seat, closing the pressure relief passage and achieving a seal.

[0004] In the above structure, the moving iron core needs to reciprocate in a sliding channel opened in the valve body or a special guide sleeve. In order to ensure the smooth movement of the moving iron core and prevent jamming, there must be a certain fit clearance between the moving iron core and the inner wall of the sliding channel. In addition, to ensure the smooth flow of gas, several axial straight grooves are generally opened on the cylindrical surface of the moving iron core. These straight grooves provide additional flow paths for gas, so that high-pressure gas can pass through the sliding gap more smoothly, thereby improving the pressure relief performance to a certain extent.

[0005] However, the straight groove significantly weakens the guiding support area and structural integrity of the moving iron core. The presence of the straight groove reduces the effective guiding contact surface of the moving iron core in the sliding channel, resulting in a significant decrease in its ability to resist radial offset (i.e., displacement in the direction perpendicular to the axis) during movement. This increases the stroke and possibility of the moving iron core radially "moving" or tilting in the sliding channel. This not only increases the local contact stress between the moving iron core and the inner wall of the sliding channel, leading to uneven wear and reducing the life of components, but also the radial movement of the moving iron core is transmitted to the sealing ring at its end, causing the sealing ring to fail to fit evenly and centrally with the valve seat, thus causing problems such as poor sealing, premature wear, or leakage. Utility Model Content

[0006] To address the technical problems existing in the background art, this utility model proposes a vent valve to prevent radial displacement.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A vent valve for preventing radial displacement includes a housing, a coil assembly inside the housing, a stationary iron core inside the coil assembly, a sliding sleeve on the stationary iron core, a sliding cavity formed on the sliding sleeve, and a moving iron core slidably disposed on the sliding cavity. The movable sleeve has several air holes, and the outer periphery of the moving iron core has several through air grooves, which are arranged in a spiral shape.

[0008] Preferably, the inlet and outlet ends of the venting groove are staggered along the projection direction of the moving iron core axis. Through this improvement, the venting groove provides a clear, low-resistance flow path for high-pressure gas. Gas can flow smoothly from one end of the sliding gap along this venting groove with a specific orientation to the other end, effectively preventing gas accumulation and back pressure formation within the sliding gap. This ensures the rapid response and efficient release of the pressure relief valve. Furthermore, because the inlet and outlet ends of the venting groove are staggered and do not intersect in the axial projection, the groove body presents an inclined or spiral shape on the cylindrical surface of the moving iron core. This structure maximizes the preservation of the continuous guide support surface of the moving iron core at any radial angle, effectively suppressing radial "movement" and tilting of the moving iron core.

[0009] Preferably, the through-hole on the outer peripheral wall of the moving iron core has an air inlet end and an air outlet end, and in the projection direction, the relative displacement distance between the air inlet end and the air outlet end along the circumference is at least twice the width of the air inlet end slot. Through the above improvements, a sufficiently large effective flow area is provided to ensure low flow resistance, while minimizing the weakening of the moving iron core wall thickness and guiding continuity caused by the slotting.

[0010] Preferably, the spiral rotation directions of adjacent air passages are opposite. With the above improvement, when high-pressure gas flows through these spiral passages with opposite directions, it will generate a hydrodynamic force on the wall surface of the moving iron core that is perpendicular to the direction of the passage line. The spiral passages in a single direction will cause the moving iron core to be subjected to a continuous radial bias force in a single direction, thereby preventing the moving iron core from rotating and moving, so as to ensure the stability of the moving iron core.

[0011] Preferably, the moving iron core is provided with guide balls embedded in its outer periphery, and the sliding cavity is provided with guide grooves for the guide balls to be placed in. Through the above improvements, the sliding friction between the moving iron core and the channel wall in the traditional structure is transformed into rolling friction, so as to avoid the moving iron core from moving and improve the stability of the moving iron core during the up and down sliding process.

[0012] Preferably, the elastic element is sleeved on the moving iron core, a first limiting groove is formed inside the housing to allow one end of the elastic element to be inserted, and a second limiting groove is formed on the movable sleeve to allow the other end of the elastic element to be inserted. Through the above improvements, the stability of the installation of the elastic element is ensured, and the stability of the moving iron core during the up and down sliding process is improved.

[0013] Preferably, a first sealing ring is embedded at the bottom of the movable sleeve. Through the above improvements, a higher level and more reliable sealing guarantee is provided, which greatly reduces the risk of high-pressure gas leakage in the closed state.

[0014] Preferably, the housing is provided with a second sealing ring, which abuts against the outer periphery of the movable sleeve. Through the above improvements, the sealing performance between the movable sleeve and the housing is greatly increased, and leakage between the movable sleeve and the housing is avoided.

[0015] Preferably, the housing has a sealing groove, a third sealing ring is disposed in the sealing groove, and a fixing cover is disposed on the housing. The fixing cover presses against the second sealing ring and abuts against the third sealing ring to prevent the third sealing ring from detaching from the sealing groove. Through the above improvements, the sealing effect is further enhanced, and the reliability of the installation of the second and third sealing rings is ensured.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: By incorporating spirally arranged venting grooves on the moving iron core, a clear, low-resistance flow path is provided for high-pressure gas. Gas can flow smoothly from one end of the sliding gap along this groove with a specific orientation to the other end, effectively preventing gas accumulation and back pressure formation within the sliding gap. This ensures rapid response and efficient release of pressure from the pressure relief valve. Furthermore, because the inlet and outlet ends of the venting grooves are staggered and do not intersect on their axial projections, the grooves exhibit an inclined or spiral shape on the cylindrical surface of the moving iron core. This structure maximizes the preservation of a continuous guiding support surface for the moving iron core at any radial angle, effectively suppressing radial "movement" and tilting of the moving iron core. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the structure of the moving iron core in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the moving iron core in Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the moving iron core in Embodiment 3 of this utility model; Figure 6 This is a schematic diagram of the sliding sleeve in Embodiment 3 of this utility model; In the diagram: 1. Housing; 2. Coil assembly; 3. Stationary iron core; 4. Sliding sleeve; 5. Sliding cavity; 6. Moving iron core; 7. Movable sleeve; 8. Elastic element; 1.1. Vent hole; 1.2. Vent groove; 1.3. Guide ball; 1.4. Guide groove; 2.1. First limiting groove; 2.2. Second limiting groove; 3.1. First sealing ring; 3.2. Second sealing ring; 3.3. Sealing groove; 3.4. Third sealing ring; 3.5. Fixed cover; Detailed Implementation

[0018] 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.

[0019] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0020] Example 1 like Figure 1-3 As shown, a vent valve for preventing radial displacement includes a housing 1, a coil assembly 2 inside the housing 1, a stationary iron core 3 inside the coil assembly 2, a sliding sleeve 4 on the stationary iron core 3, a sliding cavity 5 on the sliding sleeve 4, and a moving iron core 6 slidably disposed on the sliding cavity 5. A movable sleeve 7 is connected to the end of the moving iron core 6, and an elastic element 8 is provided inside the housing 1. The elastic element 8 abuts against the movable sleeve 7 so that the moving iron core 6 always has the tendency to drive the movable sleeve 7 out of the housing 1.

[0021] Specifically, the movable sleeve 7 has several air holes 1.1, and the outer periphery of the moving iron core 6 has several through air grooves 1.2, which are arranged in a spiral shape.

[0022] When the coil is energized, the generated electromagnetic force drives the moving iron core 6 to move upward against the elastic element 8, thereby opening the pressure relief channel and allowing the high-pressure gas to be released. When the coil is de-energized, the electromagnetic force disappears, and the moving iron core 6 moves downward under the action of the elastic element 8 to close the pressure relief channel and achieve a seal.

[0023] Among them, the air passage groove 1.2 provides a clear and low-resistance flow path for high-pressure gas. Gas can flow smoothly from one end of the sliding gap to the other end along this air passage groove 1.2 with a specific orientation, effectively avoiding the accumulation of gas in the sliding gap and the formation of back pressure. This ensures the rapid response and efficient release of the pressure relief valve. The spiral setting of the air passage groove 1.2 maximizes the preservation of the continuous guide support surface of the moving iron core 6 at any radial angle, so as to effectively suppress the radial "movement" and tilting of the moving iron core 6.

[0024] like Figure 1-3 As shown, in a further explanation of the implementation of the air passage 1.2 in this embodiment, the air inlet and air outlet of the air passage 1.2 are staggered along the projection direction of the axis of the moving iron core 6, so that they are exposed at the air inlet or air outlet of the air passage 1.2.

[0025] Because the air inlet and outlet of the air passage 1.2 are staggered on the axial projection, the passage body presents an inclined or spiral shape on the cylindrical surface of the moving iron core 6. This structure preserves the continuous guide support surface of the moving iron core 6 at any radial angle to the maximum extent.

[0026] Among them, the air inlet or outlet of the air passage 1.2 can be completely staggered and not intersecting, or partially intersecting.

[0027] Preferably, the through-hole vent 1.2 on the outer peripheral wall of the moving iron core 6 has an inlet end and an outlet end, and in the projection direction, the relative displacement distance between the inlet end and the outlet end along the circumference is at least twice the width of the inlet end slot. This not only provides a sufficiently large effective flow area to ensure low flow resistance, but also minimizes the weakening of the wall thickness and guiding continuity of the moving iron core 6 caused by the slot.

[0028] For example, the lead angle of the spiral groove extending axially is θ. In the projection direction, the relative displacement distance between the air inlet end and the air outlet end of the air passage 1.2 along the circumference is twice the width W of the air inlet end groove. This circumferential displacement is determined by the spiral helix angle θ of the air passage 1.2 and the axial length L of the air passage 1.2, satisfying the relationship: circumferential displacement ΔC = L · tanθ = 2W; and the groove widths of the air inlet end groove and the air outlet end groove are the same.

[0029] like Figure 1-3 As shown, as a further explanation of the installation of the elastic element 8, the elastic element 8 is sleeved on the moving iron core 6. The housing 1 forms a first limiting groove 2.1 into which one end of the elastic element 8 is inserted, and the movable sleeve 7 forms a second limiting groove 2.2 into which the other end of the elastic element 8 is inserted, thereby ensuring the stability of the installation of the elastic element 8 and improving the stability of the moving iron core 6 during the up and down sliding process.

[0030] like Figure 1-3As shown, in a further explanation of the sealing implementation of the vent valve, the bottom of the movable sleeve 7 is provided with a first sealing ring 3.1, which provides a higher level and more reliable sealing guarantee, greatly reducing the risk of high-pressure gas leakage in the closed state.

[0031] Furthermore, a second sealing ring 3.2 is provided on the housing 1. The second sealing ring 3.2 abuts against the outer periphery of the movable sleeve 7, which greatly increases the sealing between the movable sleeve 7 and the housing 1 and prevents leakage between the movable sleeve 7 and the housing 1.

[0032] In addition, a sealing groove 3.3 is formed on the housing 1, and a third sealing ring 3.4 is provided in the sealing groove 3.3. A fixing cover 3.5 is provided on the housing 1. The fixing cover 3.5 is pressed on the second sealing ring 3.2 and abuts against the third sealing ring 3.4 to prevent the third sealing ring 3.4 from disengaging from the sealing groove 3.3, thereby further improving the sealing effect and ensuring the reliability of the installation of the second sealing ring 3.2 and the third sealing ring 3.4.

[0033] Example 2 like Figure 4 As shown, the difference between this embodiment and embodiment one is that the spiral rotation directions of adjacent air passage grooves 1.2 are set in opposite directions. When high-pressure gas flows through these spiral grooves with opposite directions, it will generate a hydrodynamic force perpendicular to the groove line direction on the wall of the moving iron core 6. The spiral groove in a single direction will cause the moving iron core 6 to be subjected to a continuous radial bias force in a single direction, thereby preventing the moving iron core 6 from rotating and moving, so as to ensure the stability of the moving iron core 6.

[0034] Example 3 like Figure 5 , Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that a guide ball 1.3 is embedded in the outer periphery of the moving iron core 6, which transforms the sliding friction between the moving iron core 6 and the channel wall in the traditional structure into rolling friction, so as to prevent the moving iron core 6 from moving.

[0035] Among them, the guide ball 1.3 is a ball head plunger, which is a common standard in the existing technology, so its structure will not be described in detail.

[0036] In addition, the sliding cavity 5 is provided with a guide groove 1.4 for the guide ball 1.3 to be inserted. The guide ball 1.3 can slide along the sliding cavity 5, thereby further improving the stability of the moving iron core 6 during the up and down sliding process.

[0037] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A vent valve for preventing radial displacement, characterized in that, The device includes a housing (1), a coil assembly (2) is provided inside the housing (1), a stationary iron core (3) is provided inside the coil assembly (2), a sliding sleeve (4) is provided on the stationary iron core (3), a sliding cavity (5) is formed on the sliding sleeve (4), and a moving iron core (6) is slidably provided on the sliding cavity (5). A movable sleeve (7) is connected to the end of the moving iron core (6), and an elastic element (8) is provided inside the housing (1). The elastic element (8) abuts against the movable sleeve (7) so that the moving iron core (6) always has the tendency to drive the movable sleeve (7) to extend out of the housing (1). The movable sleeve (7) has several air holes (1.1), and the outer periphery of the moving iron core (6) has several through air grooves (1.2), and the air grooves (1.2) are arranged in a spiral shape.

2. The vent valve for preventing radial displacement according to claim 1, characterized in that: The air inlet and outlet of the air passage (1.2) are staggered along the projection direction of the axis of the moving iron core (6).

3. The vent valve for preventing radial displacement according to claim 1, characterized in that: The through-hole (1.2) on the outer peripheral wall of the moving iron core (6) has an air inlet end and an air outlet end, and in the projection direction, the relative displacement distance between the air inlet end and the air outlet end along the circumferential direction is at least twice the width of the air inlet end slot.

4. A vent valve for preventing radial displacement according to claim 1, characterized in that: The spiral rotation directions of adjacent air passages (1.2) are arranged in opposite directions.

5. A vent valve for preventing radial displacement according to claim 1, characterized in that: The moving iron core (6) is provided with a guide ball (1.3) embedded in its outer periphery, and the sliding cavity (5) is provided with a guide groove (1.4) for the guide ball (1.3) to be placed in.

6. A vent valve for preventing radial displacement according to claim 1, characterized in that: The elastic element (8) is sleeved on the moving iron core (6), and the housing (1) forms a first limiting groove (2.1) into which one end of the elastic element (8) is inserted, and the movable sleeve (7) forms a second limiting groove (2.2) into which the other end of the elastic element (8) is inserted.

7. A vent valve for preventing radial displacement according to claim 1, characterized in that: The bottom of the movable sleeve (7) is fitted with a first sealing ring (3.1).

8. A vent valve for preventing radial displacement according to claim 1, characterized in that: The housing (1) is provided with a second sealing ring (3.2), which abuts against the outer periphery of the movable sleeve (7).

9. A vent valve for preventing radial displacement according to claim 8, characterized in that: The housing (1) has a sealing groove (3.3), a third sealing ring (3.4) is provided in the sealing groove (3.3), and a fixing cover (3.5) is provided on the housing (1). The fixing cover (3.5) is pressed on the second sealing ring (3.2) and abuts against the third sealing ring (3.4) to restrict the third sealing ring (3.4) from leaving the sealing groove (3.3).

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