Electromagnetic relay
By using insulating oil filling chamber and constant voltage spring reset mechanism in the relay, the poor contact and arc ignition caused by armature vibration when the relay is triggered is solved, and its safety and reliability in high-frequency operation is improved.
Patent Information
- Application Number
- CN202411671567.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-01-03
AI Technical Summary
When triggering, the armature of existing relays is prone to slight vibration due to inertia and spring, resulting in poor contact and arc ignition, especially when operating at high frequency, there are major safety hazards.
An electromagnetic relay is designed, using an insulating oil-filled chamber structure and a constant pressure spring reset mechanism. Through the circulation of insulating oil and the design of spring, the contact vibration at the moment of contact is avoided, and the trigger time is controlled through the regulating valve to ensure that Stable contacts of contacts and safety of high frequency operation.
It effectively avoids poor contacts of relay contacts and arc ignition, and improves the safety and reliability of relays, especially during high-frequency on-off operations.
Smart Images
Figure CN119252713A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of relays, and in particular to an electromagnetic relay. Background Art
[0002] A relay is an electronic control device used in automatic control circuits to control large current operations through small currents. During operation, the relay includes an input circuit and an output circuit. When the input circuit reaches a set change, the output circuit can undergo a predetermined step change, thereby playing the role of automatic adjustment, safety protection, and circuit conversion in the circuit.
[0003] Most existing relays use electromagnetic coils to control input circuits, and when triggered, the armature on them contacts different contacts to achieve a step change in the output circuit. However, in this process, because the armature on it uses a lever structure + spring to reset, and the electromagnetic coil triggers the armature instantly, the armature is very likely to vibrate slightly at the moment of contacting the contact under the action of inertia and the elastic force of the spring on it, and the contacts on the relay are very likely to have poor contact due to the slight vibration. In addition, arcing is also very likely to occur due to slight vibration during the high-frequency on-off operation of the relay, posing a great safety hazard.
[0004] Therefore, there is an urgent need for a contact mechanism for a relay to solve the defects of the above-mentioned existing relays in the actual operation process. Summary of the invention
[0005] The present application proposes an electromagnetic relay, which has the advantage of effectively preventing the contacts on the relay from having poor contact or even arcing due to slight vibration at the moment of triggering, and is used to solve the problem that the electromagnetic coil on the existing relay triggers the armature instantly, and then under the action of inertia and the elastic force of the spring thereon, the armature is very likely to vibrate slightly at the moment of contacting the contacts, and the slight vibration is very likely to cause the contacts on the relay to have poor contact, and the relay is also very likely to have arcing due to slight vibration during the high-frequency on-off operation, posing a major safety hazard.
[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an electromagnetic relay, comprising a frame, a coil is provided at the top of the left side of the inner cavity of the frame, and an iron core is fixedly sleeved inside the coil, and a transmission rod is movably sleeved inside the iron core, the top end of the transmission rod extends to the top of the iron core and is fixedly installed with an armature block, and the armature block forms a transmission connection with the top of the iron core through a return spring movably sleeved on the top of the outer surface of the transmission rod, a first chamber is provided at the bottom of the left side of the inner cavity of the frame and directly below the coil, and the bottom end of the transmission rod extends into the inner cavity of the first chamber, and a piston whose outer surface contacts the inner wall of the first chamber is fixedly installed on the bottom end of the transmission rod, The first chamber is divided into two upper and lower chambers by the piston, and a second chamber is opened on the right side of the frame inner cavity. At the same time, the upper chamber of the first chamber is connected with the bottom of the inner cavity of the second chamber through a first connecting tube arranged inside the frame, and the lower chamber of the first chamber is connected with the top of the inner cavity of the second chamber through a second connecting tube arranged inside the frame, and a linkage block is movably sleeved inside the second chamber, a group of normally closed contacts extending into the second chamber are fixedly installed on both sides of the top of the frame inner cavity, and a group of normally open contacts extending into the second chamber are fixedly installed on both sides of the bottom of the frame inner cavity, and a group of moving contacts are respectively provided on the upper and lower sides of the linkage block.
[0007] Furthermore, the inner cavities of the first chamber and the second chamber are filled with insulating oil, the interior of the linkage block is configured as a hollow structure, and the density of the material used to make the linkage block is lower than the density of the insulating oil.
[0008] Furthermore, a positioning rod penetrating the interior of the linkage block is provided in the inner cavity of the second chamber and along the central axis direction of the linkage block, thereby effectively limiting the circumferential rotation of the linkage block.
[0009] Furthermore, the ends of the normally closed contact and the normally open contact extend out of the inner wall of the second chamber, and the end of the moving contact extends out of the outer surface of the linkage block, so that when the moving contact comes into contact with the normally closed contact or the normally open contact, a gap remains between the outer surface of the linkage block and the inner wall of the second chamber.
[0010] Furthermore, a regulating valve is provided inside the second connecting pipe to adjust the mutual flow speed of the insulating oil in the first chamber and the second chamber to reversely control the triggering time of the relay, and realize the delayed triggering mechanism of the relay under different working conditions.
[0011] Furthermore, a group of sealing rings are fixedly sleeved on the middle parts of the outer surfaces of the piston and the linkage block respectively, and are in contact with the inner wall of the first chamber and the inner wall of the second chamber.
[0012] Furthermore, the reset spring adopts a constant pressure spring structure, and its elastic force is smaller than the attraction of the magnetic field generated when the coil is energized and triggered to the armature.
[0013] The present invention application has the following technical effects:
[0014] An electromagnetic relay provided by the present application has a piston on a first chamber and a linkage block on a second chamber, and insulating oil is filled therein, so that the insulating oil in the upper and lower chambers of the first chamber can be squeezed and transported to the top or bottom of the inner cavity of the second chamber under different working conditions to achieve contact and conduction between the moving contact and the normally closed contact or the normally open contact, which can effectively prevent the contacts on the relay from vibrating slightly at the moment of triggering the contact, causing poor contact or even arcing, thereby making the relay safer and more reliable during high-frequency on-off operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.
[0016] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:
[0017] Figure 1 It is a schematic diagram of the structure of the present invention;
[0018] Figure 2 It is a front view of the structure of the present invention;
[0019] Figure 3 A side view of the structure of the present invention;
[0020] Figure 4 It is a back view of the structure of the present invention.
[0021] In the figure: 1. frame; 2. coil; 3. iron core; 4. transmission rod; 5. armature block; 6. return spring; 7. first chamber; 8. piston; 9. second chamber; 10. linkage block; 11. positioning rod; 12. first connecting pipe; 13. second connecting pipe; 14. normally closed contact; 15. normally open contact; 16. moving contact; 17. regulating valve. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0023] like Figure 1 , Figure 2As shown, an electromagnetic relay comprises a frame 1 which can be fixedly installed in an electric control box, a coil 2 which is connected to an external low-voltage circuit is provided at the top of the left side of the inner cavity of the frame 1, an iron core 3 is fixedly sleeved inside the coil 2, and a transmission rod 4 made of non-ferromagnetic material is movably sleeved inside the iron core 3, the top end of the transmission rod 4 extends to the top of the iron core 3 and is fixedly installed with an armature 5 made of ferromagnetic material, the armature 5 is connected to the top of the iron core 3 through a reset spring 6 which is movably sleeved on the top of the outer surface of the transmission rod 4 to form a transmission connection with the top of the iron core 3, and then when the coil 2 is connected to generate a magnetic field, the armature 5 can be attracted to move downward and compress the reset spring 6, a first chamber 7 is provided at the bottom of the left side of the inner cavity of the frame 1 and directly below the coil 2, and the bottom end of the transmission rod 4 extends into the inner cavity of the first chamber 7, and a piston 8 whose outer surface contacts the inner wall of the first chamber 7 is fixedly installed at the bottom end of the transmission rod 4, and then the first chamber 7 is divided into two upper and lower chambers by the piston 8;
[0024] A second chamber 9 is provided on the right side of the inner cavity of the frame 1. At the same time, the upper chamber of the first chamber 7 is connected to the bottom of the inner cavity of the second chamber 9 through a first connecting pipe 12 provided inside the frame 1. Figure 4 As shown, the lower chamber of the first chamber 7 is connected to the top of the inner cavity of the second chamber 9 through the second connecting pipe 13 arranged inside the frame 1, and a linkage block 10 is movably sleeved inside the second chamber 9. Then, through the arrangement of the first connecting pipe 12 and the second connecting pipe 13, the flow of fluid can be used to buffer the impact force generated by the coil 2 on the transmission rod 4 at the moment of triggering, and when the relay is triggered, the contacts thereon will not vibrate slightly at the moment of contact, as shown in FIG. Figure 3 As shown, a group of normally closed contacts 14 extending into the second chamber 9 are fixedly installed on both sides of the top of the inner cavity of the frame 1, and an electrical connection circuit is formed with an external high-voltage electrical device through the normally closed contacts 14, and a group of normally open contacts 15 extending into the second chamber 9 are fixedly installed on both sides of the bottom of the inner cavity of the frame 1, and an electrical connection circuit is formed with another group of external high-voltage electrical devices through the normally closed contacts 14, and a group of moving contacts 16 are respectively provided on the upper and lower sides of the linkage block 10, and then the on-off state of the above two groups of electrical connection circuits is controlled by the relative position of the linkage block 10:
[0025] In the initial state, the elastic force of the return spring 6 can keep the armature block 5 and the transmission rod 4 thereon in the highest position, and compress the fluid in the upper chamber of the first chamber 7 to the bottom of the inner cavity of the second chamber 9, so that the linkage block 10 is in an upward position, and the upper movable contact 16 inside it contacts the normally closed contact 14, and connects the high-voltage electrical equipment thereon;
[0026] When the coil 2 is energized and triggered, a corresponding magnetic field strength is generated to attract the armature block 5 to move downward, and force the transmission rod 4 and the piston 8 at its bottom end to move downward, thereby squeezing the fluid in the lower chamber of the first chamber 7 to the top of the inner cavity of the second chamber 9 through the second connecting pipe 13, and forcing the linkage block 10 to have a tendency to move downward. At the same time, a negative pressure is generated in the upper chamber of the first chamber 7, so that the fluid at the bottom of the inner cavity of the second chamber 9 flows back to the upper chamber of the first chamber 7 through the first connecting pipe 12, until the moving contact 16 below the linkage block 10 contacts the normally open contact 15, and connects to another group of high-voltage electrical equipment on it, and cuts off the conductive connection to the normally closed contact 14, thereby ensuring that in one state, only one group of the normally closed contact 14 and the normally open contact 15 can be in contact and conductive with the moving contact 16 on the linkage block 10.
[0027] In the present technical solution, the inner cavities of the first chamber 7 and the second chamber 9 are filled with a full volume of insulating oil, thereby effectively avoiding the arc sparking phenomenon generated by the moving contact 16 and the normally closed contact 14 or the normally open contact 15 at the moment of contact. At the same time, it can absorb the heat generated when the moving contact 16 contacts and conducts with the normally closed contact 14 or the normally open contact 15, and prevents the problem of deformation due to excessive temperature during conduction. The interior of the linkage block 10 is set as a hollow structure, and the density of the material used to make the linkage block 10 is less than the density of the insulating oil. Therefore, when it is in action, the insulating oil thereon can effectively push the linkage block 10 up and down, and in the initial state, it can float on the insulating oil, and the moving contact 16 thereon can always maintain a state of contact with the normally closed contact 14.
[0028] like Figure 1 As shown, in the present technical solution, a positioning rod 11 is provided in the inner cavity of the second chamber 9 and along the central axis direction of the linkage block 10, thereby effectively limiting the circumferential rotation of the linkage block 10, and in the process of its up and down movement, the moving contact 16 thereon can always maintain a stable contact state with the normally closed contact 14 or the normally open contact 15 on the frame 1, and the positions of the moving contact 16 and the normally closed contact 14 or the normally open contact 15 thereon will not be staggered with each other due to the circumferential rotation of the linkage block 10, thereby causing poor contact or a phenomenon of being unable to contact.
[0029] like Figure 3As shown, in the present technical solution, the ends of the normally closed contact 14 and the normally open contact 15 extend out of the inner wall of the second chamber 9, and the end of the moving contact 16 extends out of the outer surface of the linkage block 10, so that when the moving contact 16 comes into contact with the normally closed contact 14 or the normally open contact 15, a gap may remain between the outer surface of the linkage block 10 and the inner wall of the second chamber 9, thereby forcing the linkage block 10 to react quickly and move when the insulating oil is squeezed and transported. At the same time, due to the existence of the gap, a certain amount of insulating oil will remain between them, and the contact points of the relay can be directly wrapped therein.
[0030] like Figure 4 As shown, in the present technical solution, a regulating valve 17 is provided inside the second connecting pipe 13, so as to regulate the mutual flow speed of the insulating oil in the first chamber 7 and the second chamber 9 to reversely control the triggering time of the relay, and realize the delayed triggering mechanism of the relay under different working conditions, thereby effectively improving the application scope of the relay.
[0031] like Figure 1 As shown, in the present technical solution, a group of sealing rings are fixedly sleeved on the middle of the outer surface of the piston 8 and the linkage block 10 respectively, and are in contact with the inner wall of the first chamber 7 and the inner wall of the second chamber 9, so that the sealing between them is higher and the sensitivity of the relay when triggered and operated is effectively improved.
[0032] In the present technical solution, the reset spring 6 adopts a constant pressure spring structure, and its elastic force is smaller than the attraction of the magnetic field generated when the coil 2 is energized and triggered on the armature block 5, thereby ensuring that the coil 2 can force the armature block 5 to overcome the elastic force of the reset spring 6 and move downward when energized and triggered, so that the relay can be triggered normally.
Claims
1. An electromagnetic relay, comprising a frame (1), wherein a coil (2) is provided at the top of the left side of the inner cavity of the frame (1), and an iron core (3) is fixedly sleeved inside the coil (2), and a transmission rod (4) is movably sleeved inside the iron core (3), the top end of the transmission rod (4) extends to the top of the iron core (3) and is fixedly mounted with an armature (5), and the armature (5) is transmission-connected to the top of the iron core (3) through a return spring (6) movably sleeved on the top of the outer surface of the transmission rod (4), and is characterized in that: A first chamber (7) is provided at the bottom of the left side of the inner cavity of the frame (1) and directly below the coil (2), and the bottom end of the transmission rod (4) extends into the inner cavity of the first chamber (7), and a piston (8) whose outer surface contacts the inner wall of the first chamber (7) is fixedly installed at the bottom end of the transmission rod (4), thereby dividing the first chamber (7) into two upper and lower chambers through the piston (8). A second chamber (9) is provided on the right side of the inner cavity of the frame (1), and at the same time, the upper chamber of the first chamber (7) is connected to the bottom of the inner cavity of the second chamber (9) through a first connecting pipe (12) provided inside the frame (1). The first chamber (7) is connected to the second chamber (9), and the lower chamber of the first chamber (7) is connected to the top of the inner cavity of the second chamber (9) through a second connecting pipe (13) arranged inside the frame (1), and a linkage block (10) is movably sleeved inside the second chamber (9), a group of normally closed contacts (14) extending into the second chamber (9) are fixedly installed on both sides of the top of the inner cavity of the frame (1), and a group of normally open contacts (15) extending into the second chamber (9) are fixedly installed on both sides of the bottom of the inner cavity of the frame (1), and a group of moving contacts (16) are respectively provided on the upper and lower sides inside the linkage block (10).
2. The electromagnetic relay according to claim 1, characterized in that: The inner cavities of the first chamber (7) and the second chamber (9) are filled with insulating oil, the interior of the linkage block (10) is configured as a hollow structure, and the density of the material used to make the linkage block (10) is less than the density of the insulating oil.
3. The electromagnetic relay according to claim 2, characterized in that: A positioning rod (11) is provided in the inner cavity of the second chamber (9) and along the central axis of the linkage block (10), penetrating the interior of the linkage block (10), thereby effectively limiting the circumferential rotation of the linkage block (10).
4. The electromagnetic relay according to claim 3, characterized in that: The ends of the normally closed contact (14) and the normally open contact (15) extend out of the inner wall of the second chamber (9), while the end of the movable contact (16) extends out of the outer surface of the linkage block (10), so that when the movable contact (16) comes into contact with the normally closed contact (14) or the normally open contact (15), a gap remains between the outer surface of the linkage block (10) and the inner wall of the second chamber (9).
5. The electromagnetic relay according to claim 4, characterized in that: The second connecting pipe (13) is provided with a regulating valve (17) inside, thereby regulating the mutual flow speed of the insulating oil in the first chamber (7) and the second chamber (9) to reversely control the triggering time of the relay, and realize a delayed triggering mechanism for the relay under different working conditions.
6. The electromagnetic relay according to claim 5, characterized in that: A group of sealing rings are fixedly sleeved in the middle of the outer surfaces of the piston (8) and the linkage block (10) and are in contact with the inner wall of the first chamber (7) and the inner wall of the second chamber (9).
7. The electromagnetic relay according to claim 6, characterized in that: The reset spring (6) adopts a constant pressure spring structure, and its elastic force is smaller than the attraction of the magnetic field generated when the coil (2) is energized and triggered on the armature block (5).