Low-noise dry-type core reactor and vibration and noise reduction device thereof

Abstract

The application discloses a low-noise dry-type iron core reactor and a vibration and noise reduction device thereof, and relates to the technical field of electrical equipment.The application comprises a mounting seat, the top of the mounting seat is provided with a supporting seat, and the top of the supporting seat is provided with a reactor body; an optimization assembly is arranged in the reactor body; the optimization assembly comprises three groups of central columns arranged in the reactor body in a "pin-shaped" mode; the central columns are arranged in a "pin-shaped" mode.The optimization assembly arranged in a "pin-shaped" mode of three-phase central columns effectively weakens the electromagnetic exciting force caused by the imbalance of three-phase magnetic circuits, reduces vibration and noise from the source, improves insulation and anti-cracking capacity through epoxy casting coils, combines the vibration reduction assembly of spring dampers and multiple friction energy dissipation structures, carries out multi-stage buffering and vibration energy consumption on the reactor body, greatly reduces vibration transmission, cooperates with electromagnetic isolation and air cooling of the shielding cover, ensures heat dissipation while reducing noise, and significantly improves equipment operation stability and service life.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and in particular relates to low-noise dry-type iron-core reactors and their vibration reduction and noise reduction devices. Background Technology

[0002] A reactor is an electrical device that uses the inductive reactance generated by a coil conductor to limit current, filter, or compensate for reactive power. Based on its structure, it can be divided into two main categories: air-core and iron-core. In power systems, it is often used in series with parallel capacitors to suppress high-order harmonics and inrush current, protecting the safe operation of the capacitors. Furthermore, series reactors can limit short-circuit current and maintain grid voltage stability; output reactors are used on the inverter side to protect motors from voltage spikes. As an important reactive power compensation component, reactors can effectively improve the power factor, enhance power quality, and ensure the efficient and stable operation of power equipment.

[0003] A Chinese patent application (or patent) with publication number CN221632363U discloses a dry-type iron-core reactor with dustproof function, including a base, a dry-type iron-core reactor body installed on the top of the base, and an outer cover frame installed above the base. The outer cover frame is provided with heat dissipation vents, and a grid plate is provided inside the heat dissipation vents. A fixing block is fixedly connected to the inner wall of the outer cover frame at a position corresponding to the heat dissipation vents. A dustproof frame is provided on the fixing block, and an installation mechanism is provided between the fixing block and the dustproof frame. The dustproof frame is provided with a movable recess.

[0004] However, the above-mentioned device still has the following problems during implementation: When protecting the reactor with an outer cover, the single rubber pad and spring support structure is prone to aging and deformation after bearing a large load for a long time, resulting in a decrease in vibration reduction effect. The transverse arrangement of the three-phase core column often leads to an imbalance in the length and magnetic resistance of the three-phase magnetic circuit, generating a large electromagnetic excitation force, which in turn causes severe vibration. Moreover, the simple soundproof cover has limited sealing and sound insulation performance, making it difficult to effectively suppress mid- and low-frequency noise.

[0005] To address these issues, we have developed a low-noise dry-core reactor and its vibration and noise reduction device. Summary of the Invention

[0006] The purpose of this invention is to provide a low-noise dry-core reactor and its vibration reduction and noise reduction device. By optimizing the structural coordination of the components, connecting components and vibration damping components, the invention solves the problems in the prior art where the reactor uses a single rubber pad for vibration damping, the vibration reduction effect gradually decreases, and the three-phase core column transverse arrangement often leads to an imbalance in the length and magnetic resistance of the three-phase magnetic circuit.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] The present invention relates to a low-noise dry-type iron-core reactor and its vibration and noise reduction device, including a mounting base. A support base is provided on the top of the mounting base, and a reactor body is installed on the top of the support base. An optimization component is provided inside the reactor body. The optimization component includes three central columns installed inside the reactor body, which are arranged in a "pin" shape. An inner layer coil is installed inside the central column, and an outer layer coil is provided on the surface of the inner layer coil. The vibration and noise caused by the unbalance of the three-phase magnetic circuit are weakened through the optimization component. A connection component is provided on the top of the support base. The connection component includes a top plate installed on the top of the reactor body, a reinforcement rod provided on the top of the support base, a connecting rod penetrating through the top of the top plate, and a nut threadedly connected to the surface of the connecting rod. The central column is reinforced through the connection component.

[0009] The present invention is further configured such that both the inner layer coil and the outer layer coil are wound with epoxy casting coils, reducing the casting stress and partial discharge and enhancing the anti-cracking ability.

[0010] The present invention is further configured such that a connection seat is installed on the top of the top plate, and a lifting ring is fixedly connected to the top of the connection seat.

[0011] The present invention is further configured such that a vibration damping component is provided on the top of the mounting base. The vibration damping component includes a spring damper installed on the top of the mounting base, a fixed shell provided on one side of the spring damper, a limit pin slidably connected inside the fixed shell, and a first spring sleeved on the surface of the limit pin. The vibration generated by the reactor body is buffered through the vibration damping component.

[0012] The present invention is further configured such that the bottom of the fixed shell is fixedly connected to the mounting base, the top of the limit pin is fixedly connected to the support base, and one end of the first spring is fixedly connected to the fixed shell.

[0013] The present invention is further configured such that the vibration damping component further includes a first elastic plate installed inside the fixed shell, a push plate installed on one side of the first elastic plate, a first friction plate installed on one side of the push plate, a moving shell provided on one side of the fixed shell, and a second friction plate installed on one side of the moving shell.

[0014] The present invention is further configured such that a second elastic plate is installed inside the moving shell. A cross plate is fixedly connected to the bottom of the second elastic plate, and a vertical rod is fixedly connected to the bottom of the cross plate. The other end of the vertical rod is fixedly connected to the mounting base.

[0015] The present invention is further configured such that one side of the first friction plate is in contact with the second friction plate, and the amplitude of the vibration is reduced through the frictional force.

[0016] The present invention is further configured such that a shielding cover is sleeved on the surface of the reactor body, and the bottom of the shielding cover is fixedly connected to the mounting base.

[0017] The present invention is further configured such that an air inlet is provided on one side of the shielding cover, an exhaust outlet is provided on the other side of the shielding cover, and an exhaust fan is installed inside the exhaust outlet.

[0018] The present invention has the following beneficial effects.

[0019] This invention effectively weakens the electromagnetic excitation force caused by the imbalance of the three-phase magnetic circuit by adopting an optimized component with a triangular three-phase center column arrangement, thereby reducing vibration and noise at the source. The epoxy-cast coil enhances insulation and crack resistance, and the vibration damping component with spring dampers and multiple friction energy dissipation structures provides multi-level buffering and vibration energy consumption for the reactor body, significantly reducing vibration transmission. Combined with the electromagnetic isolation and air cooling of the shielding cover, it ensures heat dissipation while reducing noise, significantly improving the operational stability and service life of the equipment.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 This is a three-dimensional view of a low-noise dry-core reactor and its vibration reduction and noise reduction device.

[0023] Figure 2 This is a cross-sectional view of the shielding cover in a low-noise dry-core reactor and its vibration reduction and noise reduction device.

[0024] Figure 3 This is a schematic diagram of the connecting components in a low-noise dry-core reactor and its vibration reduction and noise reduction device.

[0025] Figure 4 This is a schematic diagram of the optimized components in a low-noise dry-core reactor and its vibration and noise reduction device.

[0026] Figure 5 This is a top view of the inner and outer coils in a low-noise dry-core reactor and its vibration reduction and noise reduction device.

[0027] Figure 6 This is a schematic diagram of the vibration damping component in a low-noise dry-core reactor and its vibration reduction and noise reduction device.

[0028] Figure 7 This is a schematic diagram showing the connection between the first friction plate and the second friction plate in a low-noise dry-core reactor and its vibration reduction and noise reduction device.

[0029] Figure 8 This is a cross-sectional view of the fixed shell in a low-noise dry-core reactor and its vibration reduction and noise reduction device.

[0030] Figure 9 It is a cross-sectional view of the moving shell in a low-noise dry-type iron-core reactor and its vibration reduction and noise reduction device.

[0031] In the attached drawings: 1. Mounting seat; 2. Support seat; 3. Reactor body; 4. Optimization component; 401. Central column; 402. Inner layer coil; 403. Outer layer coil; 5. Connection component; 501. Top plate; 502. Reinforcement rod; 503. Connecting rod; 504. Nut; 6. Connection seat; 7. Lifting ring; 8. Vibration damping component; 801. Spring damper; 802. Fixed shell; 803. Limit pin; 804. First spring; 805. First elastic plate; 806. Push plate; 807. First friction plate; 808. Moving shell; 809. Second friction plate; 9. Second elastic plate; 10. Cross plate; 11. Vertical rod; 12. Shielding cover; 13. Air inlet; 14. Air outlet; 15. Exhaust fan. Specific implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be described with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Embodiment

[0033] Please refer to Figures 1-9 , the present invention is a low-noise dry-type iron-core reactor and its vibration reduction and noise reduction device, including a mounting seat 1. A support seat 2 is provided on the top of the mounting seat 1, and a reactor body 3 is installed on the top of the support seat 2; an optimization component 4 is provided inside the reactor body 3. The optimization component 4 includes three central columns 401 installed inside the reactor body 3. The central columns 401 are arranged in a "pin" shape. An inner layer coil 402 is installed inside the central column 401, and an outer layer coil 403 is provided on the surface of the inner layer coil 402. The vibration and noise caused by the unbalance of the three-phase magnetic circuit are weakened through the optimization component 4; a connection component 5 is provided on the top of the support seat 2. The connection component 5 includes a top plate 501 installed on the top of the reactor body 3, a reinforcement rod 502 provided on the top of the support seat 2, a connecting rod 503 penetrating through the top of the top plate 501, and a nut 504 threadedly connected to the surface of the connecting rod 503. The central column 401 is reinforced through the connection component 5.

[0034] Specifically: Support base 2 is located on top of mounting base 1, connecting mounting base 1 and reactor body 3, serving as a transition support. Reactor body 3, mounted on top of support base 2, is the core component generating the inductive effect, realizing the electrical functions of limiting current, filtering, or compensating for reactive power. Optimization component 4 is located inside reactor body 3, including three sets of center columns 401. The center columns 401 adopt a triangular three-phase center column arrangement, effectively reducing the imbalance of three-phase magnetic circuit length and magnetic resistance, weakening the electromagnetic excitation force caused by the three-phase magnetic circuit imbalance, and reducing vibration and noise. Inner coil 402 is installed... Inside the central column 401, current is carried and the main magnetic field is generated. The outer coil 403 is set on the surface of the inner coil 402, and together with the inner coil 402, they form a complete winding structure, which enhances the uniformity of magnetic field distribution and reduces local stress. The top plate 501 is installed on the top of the reactor body 3 to fix and press the inner coil and the central column 401 together. The reinforcing rod 502 is set on the top of the support base 2 to enhance the rigidity of the overall structure. The connecting rod 503 passes through the top plate 501 and is locked by the nut 504 to firmly connect the top plate 501 and the support base 2, preventing the coil from loosening or shifting. Example

[0035] Please see Figures 1-9 Based on Example 1, both the inner coil 402 and the outer coil 403 are made of epoxy cast coils to reduce casting stress and partial discharge, and improve crack resistance. A connecting seat 6 is installed on the top of the top plate 501, and a lifting ring 7 is fixedly connected to the top of the connecting seat 6. A vibration damping component 8 is provided on the top of the mounting seat 1. The vibration damping component 8 includes a spring damper 801 installed on the top of the mounting seat 1, a fixed shell 802 set on one side of the spring damper 801, a limiting pin 803 slidably connected inside the fixed shell 802, and a first spring 804 sleeved on the surface of the limiting pin 803. The vibration damping component 8 buffers the vibration generated by the reactor body 3. The bottom of the fixed shell 802 is fixedly connected to the mounting seat 1, the top of the limiting pin 803 is fixedly connected to the support seat 2, and one end of the first spring 804 is fixedly connected to the fixed shell 802.

[0036] Specifically: the inner coil 402 and the outer coil 403 are made of epoxy resin casting to reduce casting stress and partial discharge, thereby improving the coil's crack resistance and overall insulation performance. The top of the connecting seat 6 is fixedly connected to a lifting ring 7, which enables the lifting and handling of the equipment, facilitating installation and maintenance. The spring damper 801 absorbs and consumes vibration energy, reducing vibration transmission. The fixed shell 802 is fixed on the mounting seat 1, with an internal sliding connection to the limiting pin 803. The top of the limiting pin 803 is fixedly connected to the support seat 2. The first spring 804 is sleeved on the surface of the limiting pin 803, with one end fixed to the fixed shell 802, buffering vertical impacts and vibrations. Example

[0037] Please see Figures 1-9 Based on Embodiments 1 and 2, the vibration damping assembly 8 further includes a first elastic plate 805 installed inside the fixed shell 802, a push plate 806 installed on one side of the first elastic plate 805, a first friction plate 807 installed on one side of the push plate 806, a movable shell 808 disposed on one side of the fixed shell 802, a second friction plate 809 installed on one side of the movable shell 808, a second elastic plate 9 installed inside the movable shell 808, a horizontal plate 10 fixedly connected to the bottom of the second elastic plate 9, a vertical rod 11 fixedly connected to the bottom of the horizontal plate 10, and the other end of the vertical rod 11 fixedly connected to the mounting base 1. One side of the first friction plate 807 contacts the second friction plate 809, and the vibration amplitude is reduced by friction. A shielding cover 12 is fitted on the surface of the reactor body 3, and the bottom of the shielding cover 12 is fixedly connected to the mounting base 1. An air inlet 13 is opened on one side of the shielding cover 12, and an exhaust outlet 14 is opened on the other side of the shielding cover 12. An exhaust fan 15 is installed inside the exhaust outlet 14.

[0038] Specifically: A first elastic plate 805 is installed inside a fixed shell 802. A push plate 806 is installed on one side, and a first friction plate 807 is installed on one side of the push plate 806. A movable shell 808 is provided on one side of the fixed shell 802, and a second friction plate 809 is installed on one side of the movable shell 808. When vibration occurs, the limit pin 803 drives the support seat 2 to move up and down. The push plate 806 pushes the first friction plate 807 to contact the second friction plate 809 and generate relative sliding. The vibration energy is converted into heat energy and dissipated through friction. A second elastic plate 9 is installed inside the movable shell 808. A horizontal plate 10 is fixedly connected to the bottom of the second elastic plate 9, and a vertical rod 11 is fixedly connected to the bottom of the horizontal plate 10. The other end of the vertical rod 11 is fixedly connected to the mounting base 1, providing elastic restoring force for the movable shell 808 and maintaining stable contact pressure between the first friction plate 807 and the second friction plate 809. A shielding cover 12 is fitted on the surface of the reactor body 3. The bottom of the shielding cover 12 is fixedly connected to the mounting base 1, isolating electromagnetic noise and physical impact, and playing a protective and noise reduction role. An air inlet 13 is opened on one side of the shielding cover 12, and an exhaust outlet 14 is opened on the other side. An exhaust fan 15 is installed inside the exhaust outlet 14. The air inlet 13 introduces external cold air, and the exhaust outlet 14 discharges hot air. The exhaust fan 15 accelerates the air flow to achieve forced air cooling of the reactor.

[0039] The working principle of this invention is as follows: After the reactor body 3 is energized, the three-phase center column 401 arranged in a triangular shape makes the magnetic field distribution more balanced, reducing the vibration and noise caused by the imbalance of the three-phase magnetic circuit. The inner coil 402 and the outer coil 403 adopt an epoxy casting structure to reduce casting stress and partial discharge, improve crack resistance, and enhance mechanical strength and insulation performance.

[0040] When the reactor body 3 vibrates during operation, the reactor body 3 drives the support base 2 to conduct the vibration downward. The support base 2 drives the limit pin 803 to slide inside the fixed shell 802, compressing the first spring 804 and the spring damper 801. The first spring 804 and the spring damper 801 contract, achieving vertical buffering. As the support base 2 moves downward, it drives the moving shell 808 to move. The moving shell 808 drives the second friction plate 809 to move downward. The first friction plate 807 and the second friction plate 809 slide relative to each other, converting the vibration energy into heat energy through friction, thus achieving secondary buffering.

[0041] As the movable shell 808 moves downward, it works in conjunction with the vertical rod 11 and the horizontal plate 10 to compress the second elastic plate 9. The second elastic plate 9 contracts to absorb the remaining vibration, further improving the vibration damping effect. At the same time, the shield 12 blocks the electromagnetic noise from propagating outward. The exhaust fan 15 forms a forced airflow through the air inlet 13 and the exhaust outlet 14 to remove internal heat and ensure that the reactor operates stably in a low-noise and low-vibration state.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A low-noise dry-core reactor and its vibration and noise reduction device, including a mounting base (1), characterized in that: The mounting base (1) is provided with a support base (2) on top, and the reactor body (3) is mounted on the top of the support base (2). The reactor body (3) is equipped with an optimization component (4). The optimization component (4) includes three sets of central columns (401) installed inside the reactor body (3). The central columns (401) are arranged in a "three-character" shape. An inner coil (402) is installed inside the central column (401). An outer coil (403) is provided on the surface of the inner coil (402). The optimization component (4) reduces the vibration and noise caused by the imbalance of the three-phase magnetic circuit. The support base (2) is provided with a connecting component (5) on its top. The connecting component (5) includes a top plate (501) installed on the top of the reactor body (3), a reinforcing rod (502) set on the top of the support base (2), a connecting rod (503) passing through the top of the top plate (501), and a nut (504) threaded to the surface of the connecting rod (503). The connecting component (5) reinforces the central column (401).

2. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 1, characterized in that: Both the inner coil (402) and the outer coil (403) are made of epoxy cast coil, which reduces casting stress and partial discharge and improves crack resistance.

3. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 1, characterized in that: A connecting seat (6) is installed on the top of the top plate (501), and a lifting ring (7) is fixedly connected to the top of the connecting seat (6).

4. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 1, characterized in that: The mounting base (1) is provided with a vibration damping component (8) on its top. The vibration damping component (8) includes a spring damper (801) installed on the top of the mounting base (1), a fixed shell (802) located on one side of the spring damper (801), a limiting pin (803) slidably connected inside the fixed shell (802), and a first spring (804) sleeved on the surface of the limiting pin (803). The vibration damping component (8) buffers the vibration generated by the reactor body (3).

5. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 4, characterized in that: The bottom of the fixed shell (802) is fixedly connected to the mounting base (1), the top of the limiting pin (803) is fixedly connected to the support base (2), and one end of the first spring (804) is fixedly connected to the fixed shell (802).

6. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 4, characterized in that: The vibration damping assembly (8) further includes a first elastic plate (805) installed inside the fixed shell (802), a push plate (806) installed on one side of the first elastic plate (805), a first friction plate (807) installed on one side of the push plate (806), a movable shell (808) disposed on one side of the fixed shell (802), and a second friction plate (809) installed on one side of the movable shell (808).

7. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 6, characterized in that: The movable shell (808) is equipped with a second elastic plate (9), and a horizontal plate (10) is fixedly connected to the bottom of the second elastic plate (9). A vertical rod (11) is fixedly connected to the bottom of the horizontal plate (10). The other end of the vertical rod (11) is fixedly connected to the mounting base (1). The top of the movable shell (808) is fixedly connected to the support base (2).

8. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 6, characterized in that: The first friction plate (807) is in contact with the second friction plate (809) on one side, and the amplitude of vibration is reduced by friction.

9. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 4, characterized in that: The reactor body (3) is covered with a shield (12), and the bottom of the shield (12) is fixedly connected to the mounting base (1).

10. The low-noise dry-core reactor and its vibration reduction and noise reduction device according to claim 9, characterized in that: The shield (12) has an air inlet (13) on one side and an exhaust port (14) on the other side. An exhaust fan (15) is installed inside the exhaust port (14).

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