Low-noise oil-immersed power transformer

Abstract

The utility model discloses a low-noise oil-immersed power transformer, and belongs to the technical field of power transformers. Comprising a fixed buffer seat, the output ends of a plurality of lead screw motors are connected with lead screws, movable sleeves are arranged on the circumferential outer walls of the lead screws, an iron core is arranged in a clamping frame, and the iron core can be clamped through first buffer rubber pads and first reset springs on the two sides of a plurality of limiting plates; a silica gel buffering rod and a second buffering spring in a second buffering rubber pad are matched to better buffer vibration generated during operation of the transformer, the amorphous alloy iron core is better combined for use, noise generated during operation of the transformer is reduced, a plurality of lead screw motors can be used for driving two movable sleeves to ascend and descend correspondingly, and the operation efficiency of the transformer is improved. The cleaning rubber blocks on the side walls of the first moving rod and the second moving rod are used for cleaning gaps among the second cooling fins, the situation that dust is excessively adhered and accumulated to affect the cooling efficiency is avoided, and the cooling stability of the oil-immersed power transformer in the using process is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power transformers, and more specifically to a low-noise oil-immersed power transformer. Background Art

[0002] Oil-immersed power transformer is a common type of power transformer, which plays an important role in power transmission and distribution system. The main feature of this transformer is that it uses insulating oil as insulating medium and cooling medium.

[0003] Oil-immersed power transformers are usually composed of iron core and windings, which are placed in a sealed oil tank and completely immersed in insulating oil. Oil-immersed power transformers are usually used in large-capacity power systems, such as power transmission and substations and industrial power systems. They can achieve efficient power conversion and distribution, and have high reliability and durability.

[0004] The existing oil-immersed power transformers still have the following problems: During the use of the existing oil-immersed power transformers, the transformers usually generate mechanical vibration noise or noise caused by hysteresis loss and eddy current loss due to the operation of the internal iron core and windings. These noises will not only affect the hearing and physical health of personnel, but may also affect other surrounding equipment, such as affecting the normal operation of nearby communication equipment or other precision instruments, causing many troubles to the use;

[0005] In addition, the existing oil-immersed power transformers are often used outdoors. However, due to the high amount of dust outdoors, the dust is easily adhered to the gaps between the heat sinks over time, thereby affecting the heat dissipation effect of the transformer. Manual cleaning of the dust is cumbersome, which not only increases the labor intensity of the personnel, but also has unsatisfactory efficiency, causing many problems for use.

[0006] In view of this, we propose a low-noise oil-immersed power transformer. Utility Model Content

[0007] 1. Technical problems to be solved

[0008] The utility model aims to provide a low-noise oil-immersed power transformer to solve the problems of high noise and easy adhesion of impurities and dust to the heat sink, thereby affecting the heat dissipation performance, as mentioned in the above background technology.

[0009] 2. Technical solution

[0010] A low-noise oil-immersed power transformer comprises a fixed buffer seat, limit plates are arranged on the outer walls on both sides of the fixed buffer seat, heat dissipation through-holes are opened on the front and rear outer walls of the fixed buffer seat, a rubber pad 2 is arranged at the bottom of the inner cavity of the fixed buffer seat, a metal foam is arranged on the top of the rubber pad 2, a heat sink 1 is arranged on the top of the metal foam, a fixed barrel is arranged on the outer wall of the fixed buffer seat, a plurality of the fixed barrels, a plurality of the fixed barrels are arranged with screw motors inside, a plurality of the screw motor output ends are connected to screws, a plurality of the screw circumferential outer walls are arranged with movable sleeves, a plurality of the heat sink 1 tops are arranged with oil tanks, a heat sink 2 is arranged on the outer wall of the oil tank, an upper sealing cover is arranged on the top of the oil tank, a clamping frame is fixed to the bottom of the upper sealing cover by bolts, and an iron core is arranged inside the clamping frame.

[0011] Preferably, a rubber buffer pad is provided on the side walls of the plurality of limit plates, a circular groove is opened on one side wall of the rubber buffer pad, a buffer spring is provided inside the circular groove, and the plurality of buffer springs are connected to the side wall of the oil tank.

[0012] Preferably, a silicone buffer rod is adhered inside the rubber pad 2, and a plurality of buffer springs 2 are also arranged inside the rubber pad 2.

[0013] Preferably, the outer wall of the movable sleeve is provided with a moving rod 1 and a moving rod 2, and the side walls of the moving rod 1 and the moving rod 2 are evenly spaced with cleaning rubber blocks, and the cleaning rubber blocks match the gaps between the plurality of heat sinks 2.

[0014] Preferably, a connecting rod frame is arranged on the top of the upper sealing cover, an oil pillow is arranged on the top of the connecting rod frame, and a lifting ring, a low-pressure bushing and a high-pressure bushing are also arranged on the top of the upper sealing cover.

[0015] Preferably, the outer wall of the multi-layer iron core is sleeved with a coil winding, the top of the multi-layer iron core is provided with an iron yoke, and the multi-layer iron core is made of an amorphous alloy.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the utility model has the advantages of: utilizing the advantages of excellent magnetization performance and low excitation power of amorphous alloy core, effectively solving the noise problem caused by hysteresis loss and eddy current loss, making the transformer run more quietly, and also can better buffer the vibration generated by the transformer during operation through the buffer rubber pad 1 and the return spring 1 on both sides of the multiple limit plates, in conjunction with the silicone buffer rod and the buffer spring 2 inside the buffer rubber pad 2, so that it can be better combined with the use of amorphous alloy core, reducing the noise generated by the transformer during operation;

[0018] When the outer wall of the heat sink 2 is covered with dust, the two movable sleeves can be driven to move upward and downward by a plurality of screw motors, and the cleaning rubber blocks on the side walls of the moving rod 1 and the moving rod 2 can be used to clean the gaps between the plurality of heat sink 2, so as to avoid excessive adhesion and accumulation of dust that affects the heat dissipation efficiency, and ensure the stability of heat dissipation of the oil-immersed power transformer during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the fixed buffer seat of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the movable sleeve of the utility model;

[0022] Figure 4 This is a schematic diagram of the upper sealing cover structure of the utility model;

[0023] Explanation of the numbers in the figure: 100, fixed buffer seat; 110, heat dissipation through-hole; 120, limit plate; 130, rubber buffer pad one; 140, buffer spring one; 150, rubber pad two; 151, silicone buffer rod; 152, buffer spring two; 160, metal foam; 170, heat sink one; 200, fixed barrel; 210, screw motor; 220, screw; 230, movable sleeve; 240, moving rod one; 241, cleaning rubber block; 250, moving rod two; 300, oil tank; 310, heat sink two; 320, upper sealing cover; 330, oil pillow; 331, lifting ring; 332, low-voltage bushing; 333, high-voltage bushing; 340, clamping frame; 350, iron core; 360, coil winding; 370, iron yoke. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] See also Figure 1-4 , the utility model provides a technical solution:

[0028] A low-noise oil-immersed power transformer comprises a fixed buffer seat 100, the outer walls of both sides of the fixed buffer seat 100 are provided with limit plates 120, the front and rear outer walls of the fixed buffer seat 100 are provided with heat dissipation through-holes 110, the bottom of the inner cavity of the fixed buffer seat 100 is provided with a rubber pad 150, and the top of the rubber pad 150 is provided with a metal foam 160;

[0029] In some embodiments: the metal foam material is composed of metal foam and a metal substrate, has good thermal conductivity and shock absorption performance, and can perform better heat dissipation during the shock absorption process.

[0030] A heat sink 170 is arranged on the top of the metal foam 160, a fixed barrel 200 is arranged on the outer wall of the fixed buffer seat 100, a plurality of fixed barrels 200, a screw motor 210 is arranged inside the plurality of fixed barrels 200, a screw 220 is connected to the output end of the plurality of screw motors 210, and a movable sleeve 230 is arranged on the circumferential outer wall of the plurality of screws 220;

[0031] It is convenient to drive the moving rod 1 and the moving rod 2 to cooperate with the cleaning rubber blocks 241 on their side walls to clean the gaps between the plurality of heat sinks 2 310 to prevent impurities from sticking and affecting the heat dissipation effect.

[0032] An oil tank 300 is arranged on the top of the plurality of heat sinks 170, a heat sink 2 310 is arranged on the outer wall of the oil tank 300, an upper sealing cover 320 is arranged on the top of the oil tank 300, a clamping frame 340 is fixed to the bottom of the upper sealing cover 320 by bolts, and an iron core 350 is arranged inside the clamping frame 340, so as to better fix and clamp the iron core 350 by the clamping frame 340.

[0033] Specifically, a rubber buffer pad 130 is provided on the side wall of the plurality of limit plates 120, a circular groove is opened on the side wall of the rubber buffer pad 130, a buffer spring 140 is provided inside the circular groove, and a plurality of buffer springs 140 are connected to the side wall of the oil tank 300, so as to buffer the vibration generated during the use of the transformer and reduce the generation of noise.

[0034] Furthermore, a silicone buffer rod 151 is adhered inside the rubber pad 150, and a plurality of buffer springs 152 are also arranged inside the rubber pad 150, so as to better buffer the vibration at the bottom of the transformer and reduce the transmission of noise.

[0035] Furthermore, the outer wall of the movable sleeve 230 is provided with a movable rod 1 240 and a movable rod 250, and the side walls of the movable rod 1 240 and the movable rod 250 are evenly spaced with cleaning rubber blocks 241, which match the gaps between the multiple heat sinks 2 310 to facilitate cleaning of the multiple heat sinks 2 310.

[0036] Furthermore, a connecting rod frame is arranged on the top of the upper sealing cover 320 , an oil pillow 330 is arranged on the top of the connecting rod frame, and a lifting ring 331 , a low-pressure bushing 332 and a high-pressure bushing 333 are also arranged on the top of the upper sealing cover 320 .

[0037] In some embodiments: the oil pillow 330 is used to compensate for the volume change of the insulating oil in the oil tank 300 due to thermal expansion and contraction. The lifting ring 331 is used for internal lifting of the transformer. The low-voltage bushing 332 is a component used to connect the low-voltage winding of the transformer and the external power system. It provides insulation and sealing, and can also withstand the voltage and current transmission between the winding and the external circuit. The high-voltage bushing is similar to the low-voltage bushing, but is used to connect the high-voltage winding of the transformer and the external power system. All of the above belong to the prior art.

[0038] It is worth noting that the outer wall of the multi-layer iron core 350 is sleeved with a coil winding 360 , an iron yoke 370 is arranged on the top of the multi-layer iron core 350 , and the multi-layer iron core 350 is made of an amorphous alloy.

[0039] In some embodiments: Amorphous alloy is a special metal material with very low hysteresis loss. In transformers, when the magnetic field changes, traditional silicon steel sheets will produce large hysteresis losses, resulting in vibration and noise. Due to the particularity of its microstructure, amorphous alloys have very small hysteresis losses, so they can reduce vibration and noise when the magnetic field changes. Secondly, amorphous alloys also have very low eddy current losses. In transformers, eddy currents are losses caused by induced currents in conductors due to changes in magnetic fields. Due to their special crystal structure, amorphous alloys can effectively suppress eddy current losses, reduce energy losses, and thus reduce noise.

[0040] In some embodiments: the iron core 350 is the magnetic circuit part of the transformer, the iron core 350 is divided into an iron column and an iron yoke 370, a plurality of coil windings 360 are sleeved on the iron column, and the iron yoke 370 connects the iron core to form a closed magnetic circuit, all of which belong to the prior art.

[0041] In some embodiments: the device can use an external conventional power source as power source.

[0042] In addition, the circuits, electronic components and modules involved in the utility model are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to the internal structure and methods.

[0043] Working principle: First, the advantages of excellent magnetization performance and low excitation power of the amorphous alloy core 350 can be utilized to significantly reduce the noise of the transformer during operation, and the vibration generated by the transformer can be better buffered by the buffer rubber pad 1 130 and the return spring 1 140 on both sides of the multiple limit plates 120, in conjunction with the silicone buffer rod 151 and the buffer spring 152 inside the buffer rubber pad 2 150, so that it can be better combined with the use of the amorphous alloy core 350 to reduce the noise generated by the transformer during operation;

[0044] And while the bottom of the oil-immersed power transformer is buffered, the heat sink 170 and the metal foam 160 at the bottom can cooperate with the heat sink 170 on the outer wall of the oil tank 300 to better dissipate heat. When a lot of dust accumulates on the outer wall of the heat sink 310, a plurality of screw motors 210 can be used to drive the two movable sleeves 230 to move up and down respectively, and the cleaning rubber blocks 241 on the side walls of the moving rod 1 240 and the moving rod 250 can be used to clean the gaps between the plurality of heat sinks 310 to avoid excessive adhesion and accumulation of dust that affects its heat dissipation efficiency, thereby ensuring the stability of heat dissipation of the oil-immersed power transformer during use.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A low-noise oil-immersed power transformer, comprising a fixed buffer seat (100), characterized in that: The outer walls of both sides of the fixed buffer seat (100) are provided with limit plates (120), the front and rear outer walls of the fixed buffer seat (100) are provided with heat dissipation through-holes (110), the bottom of the inner cavity of the fixed buffer seat (100) is provided with a second rubber pad (150), the top of the second rubber pad (150) is provided with a metal foam (160), the top of the metal foam (160) is provided with a first heat sink (170), the outer wall of the fixed buffer seat (100) is provided with a fixed barrel (200), and a plurality of the fixed barrels (200) are provided inside the plurality of fixed barrels (200). A screw motor (210) is provided at the top, and a plurality of output ends of the screw motors (210) are connected to screw rods (220), and a plurality of movable sleeves (230) are provided on the circumferential outer walls of the screw rods (220). An oil tank (300) is provided on the top of the plurality of heat sinks (170), and a heat sink (310) is provided on the outer wall of the oil tank (300). An upper sealing cover (320) is provided on the top of the oil tank (300), and a clamping frame (340) is fixed to the bottom of the upper sealing cover (320) by bolts, and an iron core (350) is provided inside the clamping frame (340).

2. A low-noise oil-immersed power transformer according to claim 1, characterized in that: A rubber buffer pad (130) is disposed on the side walls of the plurality of limit plates (120), a circular groove is formed on the side wall of the rubber buffer pad (130), a buffer spring (140) is disposed inside the circular groove, and a plurality of buffer springs (140) are connected to the side wall of the oil tank (300).

3. A low-noise oil-immersed power transformer according to claim 2, characterized in that: A silicone buffer rod (151) is adhered inside the second rubber pad (150), and a plurality of second buffer springs (152) are also arranged inside the second rubber pad (150).

4. A low-noise oil-immersed power transformer according to claim 3, characterized in that: The outer wall of the movable sleeve (230) is provided with a moving rod 1 (240) and a moving rod 2 (250), and the side walls of the moving rod 1 (240) and the moving rod 2 (250) are evenly spaced with cleaning rubber blocks (241), and the cleaning rubber blocks (241) match the gaps between the plurality of heat sink fins 2 (310).

5. A low-noise oil-immersed power transformer according to claim 4, characterized in that: A connecting rod frame is arranged on the top of the upper sealing cover (320), an oil pillow (330) is arranged on the top of the connecting rod frame, and a lifting ring (331), a low-pressure bushing (332) and a high-pressure bushing (333) are also arranged on the top of the upper sealing cover (320).

6. A low-noise oil-immersed power transformer according to claim 5, characterized in that: The outer wall of the multi-layer iron core (350) is sleeved with a coil winding (360), the top of the multi-layer iron core (350) is provided with an iron yoke (370), and the multi-layer iron core (350) is made of an amorphous alloy material.

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