An electromagnetically driven valve assembly
By introducing a buffer spring into the solenoid valve, the impact force of the armature on the electromagnet is buffered, which solves the noise and vibration problem at the moment of armature engagement, improves the performance and life of the solenoid valve, and achieves rapid response.
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
- 2026-06-26
Smart Images
Figure CN224414474U_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 annular recess on the side facing the armature, and a connector is formed inside the recess. The connector is an integral structure with the electromagnet.
[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 connecting body and the other end opposite to the armature;
[0011] The buffer spring has:
[0012] Free state: When the electromagnet is de-energized, the restoring force of the return spring drives the armature to remain in the initial position, and the buffer spring is in a free state, unable to apply a spring force away from the electromagnet to the armature;
[0013] 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 and to assist in providing the armature with an elastic force away from the electromagnet.
[0014] With the above structure, the electromagnetically driven valve assembly of this utility model has the following advantages compared with the prior art: one end of the buffer spring is sleeved on the connecting body and at least partially placed in the recess. 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.
[0015] The buffer spring has:
[0016] 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.
[0017] 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 front end face of the electromagnet and the armature to buffer the impact force of the armature on the electromagnet, thereby reducing noise and vibration.
[0018] 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.
[0019] As an improvement of this utility model, a groove is formed on the end face of the electromagnet facing the armature to serve as the recessed portion.
[0020] As an improvement of this utility model, the peripheral wall of the recessed portion is fitted with the outer peripheral clearance of the buffer spring.
[0021] As an improvement of this utility model, the buffer spring has at least one or more tightly wound turns at its front end.
[0022] A sleeve with axial space is formed inside the number of tightly closed turns.
[0023] The connecting body has a flange on its outer periphery, and the sleeve part is sleeved and held tightly on the outer periphery of the flange to fix the buffer spring.
[0024] As an improvement of this utility model, the armature has a hole extending along axis A and having a bottom step support on the end face facing the electromagnet;
[0025] The reset spring is installed inside the hole, with its tail end abutting against the bottom step of the hole and its front end abutting against the connecting body.
[0026] As an improvement of this utility model, a clearance fit is formed between the inner wall of the hole and the outer periphery of the return spring to suppress the tilting of the return spring.
[0027] As an improvement of this utility model, the reset spring and the buffer spring are arranged along the same axis A. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of this utility model.
[0029] Figure 2 This is a half-sectional view of the structure of this utility model.
[0030] Figure 3 This is the utility model Figure 2 Enlarged schematic diagram of the structure at point B.
[0031] The figure shows: 1. Valve body; 2. Armature; 3. Electromagnet; 4. Axial clearance; 5. Hole; 6. Recess; 6.1 Connector; 6.11 Flange; 7. Return spring; 8. Buffer spring; 8.1 Sleeve. Detailed Implementation
[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0033] Please see Figure 1-3 As shown,
[0034] An electromagnetically driven valve assembly includes:
[0035] An armature 2 and an electromagnet 3 are disposed opposite each other on the valve housing 1 along axis A;
[0036] An axial gap 4 is formed between the tail end face of electromagnet 3 and the front end face of armature 2. When electromagnet 3 is energized, armature 2 moves close to electromagnet 3, and the axial gap 4 gradually decreases to 0, and the front end face of armature 2 contacts the tail end face of electromagnet 3.
[0037] The electromagnet 3 has an annular recess 6 on the side facing the armature 2, and a connector 6.1 is formed inside the recess 6. The connector 6.1 and the electromagnet 3 are an integral structure.
[0038] 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;
[0039] The buffer spring 8 is sleeved on the connecting body 6.1 at one end and is positioned opposite the armature 2 at the other end. The buffer spring 8 is sleeved on the connecting body 6.1 and is at least partially placed in the recess 6. After adopting the buffer spring 8 with performance that meets the requirements, the assembly can be completed with less axial space through the above structural arrangement to meet the requirements of compact design.
[0040] The buffer spring 8 has:
[0041] Free state: When the electromagnet 3 is de-energized, the reset force of the reset spring 7 drives the armature 2 to keep the seal in the initial position. The buffer spring 8 is in a free state and cannot apply a spring force away from the electromagnet 3 to the armature 2. At this time, the buffer spring 8 is not compressed, and thus can effectively play a buffering role when the electromagnet 3 is energized.
[0042] 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.
[0043] 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.
[0044] In some embodiments, a groove is formed on the end face of the electromagnet 3 facing the armature 2 to form a recess 6, and the connecting body 6.1 is a cylindrical structure. When the connecting body 6.1 extends into the inner side of the buffer spring 8, it can also suppress the tilting of the buffer spring 8, keep it in the preset assembly position, and improve the reliability of operation.
[0045] In some embodiments, the peripheral wall of the recess 6 is clearance-fitted with the outer periphery of the buffer spring 8 to form a radial positioning pair, which supports the buffer spring 8 to suppress tilting and keep it in a preset assembly position, thereby improving operational reliability.
[0046] Please see Figure 3 As shown, the buffer spring 8 has at least one more coil of tightened coils at its front end.
[0047] A sleeve portion 8.1 with axial space is formed inside the number of tightened turns.
[0048] The connector 6.1 has a flange 6.11 on its outer periphery.
[0049] During assembly, firstly, the buffer spring 8 is pressed onto the connecting body 6.1, and the sleeve part 8.1 is sleeved and tightly held on the outer periphery of the flange 6.11, so that the buffer spring 8 and the electromagnet 3 can be fixedly connected, eliminating the need for additional fasteners, reducing the number of parts, and lowering production costs.
[0050] 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.
[0051] Please see Figure 2As 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;
[0052] The return spring 7 is disposed in the hole 5. Preferably, the inner wall of the hole 5 and the outer periphery of the return spring 7 form a radial positioning pair through a clearance fit to suppress the tilting of the return spring 7 and make the device operate reliably.
[0053] The tail end of the return spring 7 stops at the bottom step of the hole, and the front end of the return spring 7 stops at the connecting body 6.1. Since the connecting body 6.1 and the electromagnet 3 are integrated, they can withstand greater forces, making the device run stably.
[0054] Preferably, the bottom of the hole 5 and the bottom end face of the connector 6.1 are both planar structures, and the front and rear ends of the return spring 7 are ground flat and mated together in a planar contact manner, resulting in a larger contact area and more uniform force distribution, enabling the return spring 7 to operate stably.
[0055] Please see Figure 2 As shown, a clearance fit is formed between the inner wall of the hole 5 and the outer periphery of the return spring 7 to suppress the tilting of the return spring 7;
[0056] 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.
[0057] Please see Figure 1-2 As shown, the reset spring 7 and the buffer spring 8 are arranged along the same axis A.
[0058] After the above improvements, the elastic force acts along the axis at the center of the opposite end faces of electromagnet 3 and armature 2, with less lateral force, which makes the movement of armature 2 more stable and reduces wear.
[0059] In some embodiments, the front end of the buffer spring 8 abuts against the front end of the recess 6, forming a blocking engagement structure to limit the forward movement of the buffer spring 8 and ensure its stable operation.
[0060] 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.
[0061] 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 a ring-shaped recess (6) on the side facing the armature (2), and a connector (6.1) is formed inside the recess (6). The connector (6.1) and the electromagnet (3) are an integral structure. 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); A buffer spring (8) is fitted at one end onto the connecting body (6.1) and at the other end opposite to the armature (2); The buffer spring (8) has: 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 and cannot apply a spring force away from the electromagnet (3) to the armature (2); 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 electromagnet (3) and the armature (2) to buffer the impact force of the armature (2) on the electromagnet (3) and to assist in providing the armature (2) with a spring force away from the electromagnet (3).
2. The electromagnetically driven valve assembly according to claim 1, characterized in that: A groove is formed on the end face of the electromagnet (3) facing the armature (2) to form the recess (6).
3. The electromagnetically driven valve assembly according to claim 1, characterized in that: The peripheral wall of the recess (6) is in clearance fit with the outer periphery of the buffer spring (8).
4. The electromagnetically driven valve assembly according to claim 1, characterized in that: The buffer spring (8) has at least one or more tightly wound turns at its front end. A sleeve with axial space is formed inside the number of tight turns (8.1). The connector (6.1) has a flange (6.11) on its outer periphery, and 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).
5. 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 installed in the hole (5), with its tail end abutting against the bottom step of the hole (5) and its front end abutting against the connecting body (6.1).
6. The electromagnetically driven valve assembly according to claim 5, characterized in that: 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).
7. The electromagnetically driven valve assembly according to claim 1, characterized in that: The reset spring (7) and the buffer spring (8) are arranged along the same axis A.