An electromagnetically driven valve assembly
By introducing a buffer spring and a return spring into the solenoid valve assembly, the impact force of the armature is buffered, solving the noise and vibration problem of the solenoid valve at the moment of armature engagement, and achieving more stable operation and shorter response time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO YUNWO INTELLIGENT CONTROL TECHNOLOGY CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-06-30
AI Technical Summary
The rigid impact of the armature during the moment of engagement in existing solenoid valves causes noise and vibration, affecting service life and performance.
By introducing a buffer spring into the electromagnetic drive valve assembly, the impact force of the armature on the electromagnet is buffered. Combined with the restoring force of the return spring, noise and vibration are reduced. A compact design is achieved through a stepped hole and interference fit connection structure.
It effectively reduces noise and vibration, shortens response time, and improves the stability and sealing performance of the device.
Smart Images
Figure CN224433575U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fluid control components technology, and more specifically to an electromagnetically driven valve assembly. Background Technology
[0002] Existing solenoid valves typically consist of an electromagnet, an armature, a return spring, and a seal. When energized, the electromagnet generates a magnetic force that attracts the armature, which in turn moves the seal, causing the valve to open.
[0003] After the electromagnet is de-energized, the reset spring pushes the armature to reset, thus closing the valve.
[0004] At the moment the armature is attracted, a rigid collision occurs between the armature and the end face of the electromagnet, generating noise and vibration, which causes the performance to fail to meet the usage requirements and reduces the service life. Utility Model Content
[0005] To address the shortcomings and defects of existing technologies, an electromagnetically driven valve assembly is provided. By incorporating a buffer spring, the impact force of the armature on the electromagnet is buffered, thereby reducing noise and vibration.
[0006] An electromagnetically driven valve assembly includes:
[0007] An armature and an electromagnet are disposed opposite each other on the valve body along axis A;
[0008] The electromagnet has an access space on the side facing the armature, and the access space is used to access the connecting body extending along axis A.
[0009] A return spring, clamped between the connecting body and the electromagnet, is used to provide a return force to the armature away from the electromagnet;
[0010] A buffer spring, with one end sleeved on the outside of the connecting body and the other end opposite to the armature, is in a compressed state: when the electromagnet is energized and the armature moves toward the electromagnet under electromagnetic force, the buffer spring can be compressed between the electromagnet and the armature to buffer the impact force of the armature on the electromagnet and to assist in providing the armature with an elastic force away from the electromagnet.
[0011] With the above structure, the electromagnetically driven valve assembly of this utility model has the following advantages compared with the prior art: at least part of the buffer spring is placed in the access space formed between the access space and the connecting body. After adopting the buffer spring with performance that meets the requirements, the assembly can be completed with less axial space through the above structural arrangement to meet the compact design.
[0012] The buffer spring has:
[0013] Free state: When the electromagnet is de-energized, the reset force of the reset spring drives the armature to keep the seal in the initial position. The buffer spring is in a free state and cannot apply a force away from the electromagnet to the armature. At this time, the buffer spring is not compressed, so it can effectively play a buffering role when the electromagnet is energized.
[0014] Compression state: When the electromagnet is energized and the armature moves toward the electromagnet under electromagnetic force, the buffer spring can be compressed between the electromagnet and the armature to buffer the impact force of the armature on the electromagnet, thereby reducing noise and vibration.
[0015] When the electromagnet is de-energized, the spring force of the buffer spring and the spring force of the return spring are connected in parallel and act together on the armature, driving the armature to quickly return to its initial position, which can reduce the response time.
[0016] As an improvement of this utility model, an axially extending hole or slot structure is provided on the tail end face of the electromagnet to serve as an access space.
[0017] As an improvement to this utility model, the access space is a stepped hole.
[0018] The stepped hole includes a first section and a second section located at the front end of the first section, wherein the diameter of the second section is smaller than the diameter of the first section;
[0019] The connector is a cylindrical structure, with its front end entering the second section from the tail opening of the first section and forming a connection with the second section. The access space is formed between the periphery of the connector and the hole wall of the first section.
[0020] As an improvement of this utility model, the front end of the connector is pressed into the second section by an interference fit.
[0021] As an improvement of this utility model, the second section is a structure that passes through the electromagnet, and the front end of the connecting body extends to be flush with the front end face of the electromagnet, and the two are fixed by continuous laser welding at the front end contact surface.
[0022] As an improvement of this utility model, the buffer spring is provided with at least one or more tightly wound turns.
[0023] A sleeve with axial space is formed inside the number of tightly closed turns.
[0024] A flange is provided on the outer periphery of the connecting body located in the first segment, and the sleeve part is sleeved and held tightly on the outer periphery of the flange to fix the buffer spring.
[0025] As an improvement of this utility model, the diameter of the flange is larger than the diameter of the second segment, and the front end face of the flange is abutted against the front end face of the first segment.
[0026] As an improvement of this utility model, the connecting body is provided with a protruding abutment portion on its outer periphery.
[0027] The front end of the buffer spring is positioned to abut against the abutment part.
[0028] As an improvement of this utility model, the armature has a hole extending along axis A and supported by a bottom step on the end face facing the electromagnet;
[0029] The reset spring is disposed inside the hole, with its tail end abutting against the bottom step of the hole and its front end abutting against the bottom end face of the connector.
[0030] The inner wall of the hole forms a clearance fit with the outer periphery of the return spring to suppress the tilting of the return spring. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the structure of this utility model.
[0032] Figure 2 This is a half-sectional view of the structure of this utility model.
[0033] Figure 3 This is the utility model Figure 2 Enlarged schematic diagram of the structure at point B.
[0034] Figure 4 This is a schematic diagram of the structure of the second section of the stepped hole through electromagnet design of this utility model.
[0035] Figure 5 This is a schematic diagram of the connecting body of this utility model with steps.
[0036] The figure shows: 1. Valve body; 2. Armature; 3. Electromagnet; 4. Axial clearance; 5. Hole; 6. Access space; 6.1 Connector; 6.11 Flange; 6.12 Abutment part; 6.2 Stepped hole; 6.21 First section; 6.22 Second section; 7. Return spring; 8. Buffer spring; 8.1 Sleeve part. Detailed Implementation
[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0038] Please see Figure 1-3 As shown,
[0039] An electromagnetically driven valve assembly includes:
[0040] An armature 2 and an electromagnet 3 are arranged opposite each other on the valve body 1 along axis A. An axial gap 4 is formed between the electromagnet 3 and the armature 2. When the electromagnet 3 is energized, the armature 2 moves closer to the electromagnet 3, and the axial gap 4 gradually decreases to 0. The upper end axial surface of the armature 2 contacts the lower end axial surface of the electromagnet 3.
[0041] An access space 6 is provided on the side of the electromagnet 3 facing the armature 2. The access space 6 is used to access the connecting body 6.1 extending along the axis A.
[0042] The return spring 7 is clamped between the connector 6.1 and the electromagnet 3, and is used to provide a return force to the armature 2 away from the electromagnet 3;
[0043] The buffer spring 8, with one end sleeved on the outside of the connector 6.1 and the other end opposite to the armature 2, is at least partially placed within the access space 6 formed between the access space 6 and the connector 6.1. By using a buffer spring 8 that meets the performance requirements, the above structural arrangement allows for assembly with less axial space, thus satisfying a compact design.
[0044] The buffer spring 8 has:
[0045] Free state: When the electromagnet 3 is de-energized, the reset force of the reset spring 7 drives the armature 2 to remain in the initial position, and the buffer spring 8 is in a free state. It cannot apply a spring force away from the electromagnet 3 to the armature 2. At this time, the buffer spring 8 is not compressed, so it can effectively play a buffering role when the electromagnet 3 is energized.
[0046] Compression state: When the electromagnet 3 is energized and the armature 2 moves toward the electromagnet 3 under electromagnetic force, the buffer spring 8 can be compressed between the front end face of the electromagnet 3 and the armature 2 to buffer the impact force of the armature 2 on the electromagnet 3, thereby reducing noise and vibration.
[0047] When the electromagnet 3 is de-energized, the spring force of the buffer spring 8 and the spring force of the return spring 7 are connected in parallel and act together on the armature 2, driving the armature 2 to quickly return to the initial position, which can reduce the response time.
[0048] Please see Figure 2-3 As shown, an axially extending hole or slot structure is opened on the tail end face of the electromagnet 3 to serve as an access space 6, thereby reducing the difficulty of processing.
[0049] In some embodiments, the access space 6 is a stepped hole 6.2.
[0050] The stepped hole 6.2 includes a first section 6.21 and a second section 6.22 located at the front end of the first section 6.21, wherein the diameter of the second section 6.22 is smaller than the diameter of the first section 6.21;
[0051] The connector 6.1 has a cylindrical structure. Its front end enters the second section 6.22 through the tail opening of the first section 6.21 and forms a connection with the second section 6.22. The connector 6.1 is fitted with the small diameter section of the second section 6.22 (such as by thread or interference fit), which has the feature of simple assembly.
[0052] An access space 6 is formed between the periphery of the connector 6.1 and the hole wall of the first section 6.21. The buffer spring 8 is confined within the access space 6 to prevent radial displacement or twisting when the spring is compressed.
[0053] The peripheral wall of the groove or hole is fitted with the outer peripheral clearance of the buffer spring 8 to form a radial positioning pair, which supports the buffer spring 8, inhibits the buffer spring 8 from tilting, keeps it in the preset assembly position, and improves the reliability of operation.
[0054] In some embodiments, the front end of the connector 6.1 is pressed into the second segment 6.22 by an interference fit, which makes assembly simpler, and the connection more secure and has better anti-detachment performance;
[0055] After connection, a sealing pair is formed between the connecting body 6.1 and the second section 6.22 to prevent the medium from passing through, which is conducive to the stable operation of the device.
[0056] Please see Figure 4 As shown, in some embodiments, the second segment 6.22 is a structure that passes through the electromagnet 3. The front end of the connector 6.1 extends to be flush with the front end face of the electromagnet 3, and the two are fixed by continuous laser welding at the front end contact surface, which further increases the bonding force between the connector 6.1 and the electromagnet 3. The continuous annular weld formed after laser welding can also play a sealing role, further improving the sealing performance of the device.
[0057] Please see Figure 2-3 As shown, the front end of the buffer spring 8 has at least one more tightened coil.
[0058] A sleeve portion 8.1 with axial space is formed inside the number of tightened turns.
[0059] The connector 6.1 located in the first segment 6.21 has a flange 6.11 on the outer periphery near the second segment 6.22. The tail end of the flange 6.11 has a ramp, and the diameter of the ramp gradually increases from the tail end to the front end.
[0060] During assembly, firstly, the front end of the buffer spring 8 is inserted into the tail end of the connector 6.1, and then the connector 6.1 is moved down to the sleeve part 8.1 to engage and hold tightly on the outer periphery of the flange 6.11. This completes the fixed connection between the buffer spring 8 and the electromagnet 3, eliminating the need for additional fasteners, reducing the number of parts, and lowering production costs.
[0061] Furthermore, the electromagnet 3 is inserted into the valve body 1. Since the buffer spring 8 has been fixed, it can prevent the buffer spring 8 from falling off during the installation process, thereby improving the yield rate of the production line.
[0062] Please see Figure 2-3 As shown, in some embodiments, the diameter of flange 8 is larger than the diameter of the second segment 6.22, and the front end face of flange 8 is abutted against the front end face of the first segment 6.21. This can prevent the connector 6.1 from being overloaded during assembly and can also prevent the connector 6.1 from moving forward during use, making the device operate more stably.
[0063] In the above embodiments, the front end of the buffer spring 8 is close to or directly abuts against the front end face of the first segment 6.21, which can form a blocking fit structure to keep the buffer spring 8 in the preset assembly position, and the stability of operation is further improved.
[0064] Please see Figure 5 As shown, in some embodiments, a protruding abutment portion 6.12 is provided on the outer periphery of the connector 6.1 at the front of the flange 8. The diameter of the abutment portion 6.12 is larger than the diameter of the second segment 6.22, and the front end face is abutted against the front end face of the first segment 6.21. This can prevent the connector 6.1 from being over-inserted during assembly and can also prevent the connector 6.1 from moving forward during use, making the device operate more stably.
[0065] The tail end face of the abutting part 6.12 is abutted against the front end of the buffer spring 8. The buffer spring 8 can be clamped between the bottom end face of the abutting part 6.12 and the upper end face of the armature 2. The front end of the buffer spring 8 does not have direct contact with the electromagnet 3, so that the buffer spring 8 can be kept in the preset assembly position.
[0066] Please see Figure 2 As shown, the armature 2 has a hole 5 extending along axis A and supported by a bottom step on its end face facing the electromagnet 3.
[0067] The return spring 7 is installed inside the hole 5, with its tail end abutting against the bottom step of the hole 5 and its front end abutting against the bottom end face of the connector 6.1;
[0068] The inner wall of the hole 5 and the outer periphery of the return spring 7 form a clearance fit to suppress the tilting of the return spring 7 and make the device operate reliably;
[0069] In addition, compared with the stepped hole opened at the front end of the conventional armature 2, the front end surface of the armature 2 in this application has a larger area, which in turn increases the contact area with the electromagnet 3, thereby improving the attraction force of the electromagnet 3 on the armature 2.
[0070] In addition, compared with the stepped hole provided in the conventional armature 2, the end face area where the armature 2 and the electromagnet 3 can make contact is increased in this application, thereby improving the attraction force effect of the electromagnet 3 on the armature 2.
[0071] In some embodiments, the return spring 7 and the buffer spring 8 are arranged along the same axis A, and the elastic force acts along axis A at the center position of the opposite end faces of the electromagnet 3 and the armature 2. The lateral component force is small, which makes the movement of the armature 2 more stable and reduces wear.
[0072] In some embodiments, the stiffness of the buffer spring 8 is greater than the stiffness of the return spring 7, the effective number of coils of the buffer spring 8 is less than the effective number of coils of the return spring 7, and the axial length of the buffer spring 8 is less than the axial length of the return spring 7.
[0073] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.
Claims
1. An electromagnetically actuated valve assembly, characterized by include: An armature (2) and an electromagnet (3) are disposed opposite each other on the valve body (1) along axis A; The electromagnet (3) has an access space (6) on the side facing the armature (2), and the access space (6) is used to access the connector (6.1) extending along the axis A. The return spring (7) is clamped between the connector (6.1) and the electromagnet (3) to provide a return force to the armature (2) away from the electromagnet (3); The buffer spring (8) has one end sleeved on the outside of the connecting body (6.1) and the other end set opposite to the armature (2), and has a compressed state: when the electromagnet (3) is energized, the armature (2) moves toward the electromagnet (3) under electromagnetic force, the buffer spring (8) can be compressed between the connecting body (6.1) and the armature (2) to buffer the impact force of the armature (2) on the electromagnet (3), and assist in providing the armature (2) with an elastic force away from the electromagnet (3).
2. An electromagnetically actuated valve assembly according to claim 1, wherein: An axially extending hole or slot structure is provided on the tail end face of the electromagnet (3) to serve as the access space (6).
3. The electromagnetically driven valve assembly according to claim 2, characterized in that: The access space (6) is a stepped hole (6.2). The stepped hole (6.2) includes a first segment (6.21) and a second segment (6.22) located at the front end of the first segment (6.21), wherein the diameter of the second segment (6.22) is smaller than the diameter of the first segment (6.21); The connector (6.1) is a cylindrical structure. Its front end enters the second section (6.22) from the tail opening of the first section (6.21) and forms a connection with the second section (6.22). The access space (6) is formed between the periphery of the connector (6.1) and the hole wall of the first section (6.21).
4. The electromagnetically driven valve assembly according to claim 3, characterized in that: The front end of the connector (6.1) is pressed into the second section (6.22) by an interference fit.
5. The electromagnetically driven valve assembly according to claim 3, characterized in that: The second segment (6.22) is a structure that passes through the electromagnet (3). The front end of the connector (6.1) extends to be flush with the front end face of the electromagnet (3), and the two are fixed by continuous laser welding at the front end contact surface.
6. The electromagnetically driven valve assembly according to claim 3, characterized in that: The buffer spring (8) shall have at least one or more tightly wound turns. A sleeve with axial space is formed inside the number of tight turns (8.1). A flange (6.11) is provided on the outer periphery of the connector (6.1) located in the first segment (6.21). The sleeve (8.1) is sleeved and held tightly on the outer periphery of the flange (6.11) so as to fix the buffer spring (8).
7. The electromagnetically driven valve assembly according to claim 6, characterized in that: The diameter of the flange (6.11) is larger than the diameter of the second segment (6.22), and the front end face of the flange (6.11) abuts against the front end face of the first segment (6.21).
8. The electromagnetically driven valve assembly according to claim 1, characterized in that: The connector (6.1) has a protruding abutment part (6.12) on its outer periphery. The front end of the buffer spring (8) is abutted against the abutting part (6.12).
9. The electromagnetically driven valve assembly according to claim 1, characterized in that: The armature (2) has a hole (5) extending along axis A and supported by a bottom step on the end face facing the electromagnet (3). The reset spring (7) is disposed in the hole (5), and its tail end abuts against the bottom step of the hole (5), and its front end abuts against the bottom end face of the connector (6.1); The inner wall of the hole (5) and the outer periphery of the return spring (7) form a clearance fit to suppress the tilting of the return spring (7).