Bistable permanent magnetic mechanism opening buffer device
By designing the opening buffer device of the moving iron core, permanent magnet, lower yoke, upper yoke and magnetic conduction ring in the bistable permanent magnet mechanism circuit breaker, the circuit breaker is solved by using the combined structure of spring and magnetic conduction material. The mechanical impact problem when opening the gate extends the mechanical life of the equipment and reduces the movement speed of the moving iron core.
Patent Information
- Application Number
- CN202411500696.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-01-14
AI Technical Summary
The collision between the mechanical transmission components during the opening process of the bistable permanent magnet mechanism circuit breaker is too severe, resulting in a shortening of the mechanical life. A buffering device is needed to reduce the impact force and improve the mechanical life.
A switch-opening buffer device including a moving iron core, a permanent magnet, a lower yoke, an upper yoke and a magnetic conduction ring is designed. The switch-opening coil drives the movement of the moving iron core, contacts the compressor and compresses the spring, and generates a reaction force. The speed-reducing moving iron core uses a spring structure composed of magnetic permeable material and multiple disc springs to reduce the movement speed of the moving iron core.
It effectively reduces the mechanical impact force when opening the gate, extends the mechanical life of the bistable permanent magnet mechanism circuit breaker, reduces the movement speed of the moving iron core, and improves the stability of the overall structure.
Smart Images
Figure CN119314839A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of circuit breakers of power switch equipment, and in particular relates to a bistable permanent magnet mechanism opening buffer device for driving the circuit breaker to operate. Background Art
[0002] With the continuous innovation of circuit breaker technology of power switching equipment, the bistable permanent magnet mechanism, as the core component of the circuit breaker opening and closing drive, is increasingly widely used in the field of circuit breakers due to its high reliability, simple structure and long mechanical life. However, the bistable permanent magnet mechanism also has its shortcomings. The disadvantage is that when it drives the circuit breaker, the opening speed of the circuit breaker will become faster and faster, which leads to more intense collisions between the mechanical transmission components of the circuit breaker at the end of the opening, which is not conducive to the mechanical life of the vacuum bubble and other transmission components of the circuit breaker. In order to further improve the overall mechanical life of the bistable permanent magnet mechanism circuit breaker, a buffer device is provided at the end of the opening of the bistable permanent magnet mechanism, which can more effectively reduce the mechanical impact force of each component during the opening, thereby improving the mechanical life of the bistable permanent magnet mechanism circuit breaker.
[0003] Compared with the traditional oil buffer device, this buffer device has the characteristics of small size, simple structure, long life and low cost, and has better application prospects in bistable permanent magnet mechanisms. Summary of the invention
[0004] 1. Technical issues to be resolved
[0005] The present invention provides a bistable permanent magnet mechanism opening buffer device, which is used to solve the problem that the current bistable permanent magnet mechanism circuit breaker has a large opening impact, thereby limiting the further improvement of the mechanical life of the bistable permanent magnet mechanism circuit breaker.
[0006] (II) Technical solution
[0007] To solve the above problems, the present invention provides a bistable permanent magnet mechanism tripping buffer device, comprising a moving iron core, a permanent magnet, a lower yoke, an upper yoke and a magnetic ring, wherein a closing coil is wound on the upper part of the permanent magnet, and an opening coil is wound on the lower part, the magnetic ring is sleeved on the permanent magnet, the upper yoke is connected to the upper part of the permanent magnet, and the lower yoke is connected to the lower part of the permanent magnet, the moving iron core moves back and forth between the upper yoke and the lower yoke, a groove is provided in the middle part of the lower yoke, the pressure block and the spring are sequentially arranged in the groove from top to bottom, when the opening coil is energized to drive the moving iron core to move downward for a stroke a, it begins to contact the pressure block and compresses the spring for a stroke b, at which time the spring generates an upward reaction force to prevent the moving iron core from moving downward, thereby achieving the purpose of decelerating the moving iron core.
[0008] Preferably, the pressing block is made of magnetic conductive material.
[0009] Preferably, the spring is composed of a plurality of disc spring leaves combined into a disc spring group.
[0010] (III) Technical Effect
[0011] A pressure block is provided on the lower yoke of the bistable permanent magnet mechanism, and a spring is provided under the pressure block. When the opening coil is energized to drive the moving iron core to move downward for a certain stroke, it begins to contact the pressure block and the pressure block begins to compress the spring. The spring generates an upward reaction force to prevent the moving iron core from moving downward. At the same time, the pressure block is a magnetic conductive material. When the opening coil is energized to drive the moving iron core to move downward until the moving iron core begins to contact the pressure block, a part of the magnetic flux generated by the opening coil and the permanent magnet is short-circuited through the pressure block and flows directly from one side of the magnetic pole to the other side. This part of the magnetic flux does not generate driving force on the moving iron core, thereby reducing the movement speed of the moving iron core in this stroke. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0013] Figure 1 This is a schematic diagram of the initial opening state of the opening buffer device of the bistable permanent magnet mechanism provided in an embodiment of the present application.
[0014] Figure 2 A schematic diagram of the final opening state of the opening buffer device of the bistable permanent magnet mechanism provided in an embodiment of the present application.
[0015] Figure 3 A schematic diagram of the opening completion state of the opening buffer device of the bistable permanent magnet mechanism provided in an embodiment of the present application.
[0016] Figure 4 A schematic diagram of a spring structure provided in an embodiment of the present application.
[0017] Description of reference numerals:
[0018] 1-moving iron core, 2-pressure block, 3-spring, 4-permanent magnet, 5-lower yoke, 6-upper yoke, 7-closing coil, 8-magnetic ring, 9-opening coil. Implementation
[0020] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the application embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of this application; it is obvious that the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application. Example:
[0021] Reference Figures 1 to 3 , attached Figure 1 This is a schematic diagram of the initial state of the bistable permanent magnet mechanism opening buffer device provided in the embodiment of the present application. Figure 2 This is a schematic diagram of the final state of the bistable permanent magnet mechanism opening buffer device provided in an embodiment of the present application. Figure 3 A schematic diagram of the opening completion state of the bistable permanent magnet mechanism opening buffer device provided in an embodiment of the present application, as shown in the figure, the bistable permanent magnet mechanism opening buffer device includes a moving iron core 1, a permanent magnet 4, a lower yoke 5, an upper yoke 6 and a magnetic ring 8, a closing coil 7 is wound around the upper part of the permanent magnet 4, and an opening coil 9 is wound around the lower part, the magnetic ring 8 is sleeved on the permanent magnet 4, the upper yoke 6 is connected to the upper part of the permanent magnet 4, the lower yoke 5 is connected to the lower part of the permanent magnet, a groove is provided in the middle part of the lower yoke 5, a pressure block 2 and a spring 3 are sequentially arranged in the groove from top to bottom, when the opening coil 9 is energized to drive the moving iron core 1 to move downward for a stroke a, it begins to contact the pressure block 2, the pressure block 2 begins to compress the spring 3 under the pressure of the moving iron core 1, and the spring 3 generates an upward reaction force to prevent the moving iron core 1 from moving downward.
[0022] The pressing block 2 is made of magnetic conductive material. When the opening coil 9 is energized to drive the moving iron core 1 to move downward until the moving iron core 1 begins to contact the pressing block 2, at this time, a part of the magnetic flux W1 generated by the opening coil 9 and the permanent magnet 4 is short-circuited through the pressing block 2 and flows from one pole of the magnetic pole to the other pole. This part of the magnetic flux does not generate a downward driving force for the moving iron core 1. At the same time, the spring 3 generates an upward reaction force to prevent the moving iron core 1 from moving downward, thereby reducing the movement speed of the moving iron core 1 during the stroke b section.
[0023] When the opening coil 9 is energized to drive the moving iron core 1 to move downward until the moving iron core 1 contacts the lower yoke 5 to complete the opening, the opening coil 9 is de-energized, and the moving iron core 1 is adsorbed by the magnetic flux W2 generated by the permanent magnet 4 and maintained in the opening position.
[0024] like Figure 4 The schematic diagram of the spring structure provided in the embodiment of the present application shows that the spring 3 is a butterfly spring group, which is composed of a plurality of disc spring leaves combined into a disc spring group. Compared with the coil spring, it has better mechanical properties matching the bistable permanent magnet mechanism.
[0025] The moving iron core 1 moves back and forth between the upper yoke 6 and the lower yoke 5, and is characterized in that a groove is provided in the middle of the lower yoke, and the pressure block and the spring are arranged in the groove from top to bottom in sequence. When the opening coil is energized to drive the moving iron core to move downward for a stroke a, it begins to contact the pressure block and compresses the spring for a stroke b. At this time, the spring generates an upward reaction force to prevent the moving iron core from moving downward, thereby achieving the purpose of decelerating the moving iron core.
[0026] It should be noted that the terms "upper", "lower", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when used in this application. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0027] It should also be noted that, unless otherwise clearly specified and limited, the terms "provided with", "opened with", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
Claims
1. A bistable permanent magnetic mechanism opening buffer device, characterized in that: It includes a moving iron core, a permanent magnet, a lower yoke, an upper yoke and a magnetic ring. The upper part of the permanent magnet is wound with a closing coil, and the lower part is wound with an opening coil. The magnetic ring is sleeved on the permanent magnet. The upper yoke is connected to the upper part of the permanent magnet, and the lower yoke is connected to the lower part of the permanent magnet. The moving iron core moves back and forth between the upper yoke and the lower yoke. A groove is provided in the middle of the lower yoke. The pressure block and the spring are arranged in the groove from top to bottom in sequence. When the opening coil is energized to drive the moving iron core to move downward for a stroke a, it begins to contact the pressure block and compresses the spring for a stroke b. At this time, the spring generates an upward reaction force to prevent the moving iron core from moving downward, thereby achieving the purpose of decelerating the moving iron core.
2. A bistable permanent magnetic mechanism opening buffer device according to claim 1, characterized in that: The pressing block is made of magnetic conductive material.
3. A bistable permanent magnetic mechanism opening buffer device according to claim 1 or 2, characterized in that: The spring is composed of a plurality of disc spring leaves combined into a disc spring group.