阅读说明：本技术 一种油浸式变压器 (Oil-immersed transformer ) 是由 王义明 苗建峰 杨金华 王�华 汪列挺 胡周南 王婉儿 俞伟峰 屠佳云 于 2021-09-29 设计创作，主要内容包括：本申请涉及一种油浸式变压器,属于变压器的领域。其包括油箱和安装于油箱内的铁芯以及绕组,所述油箱内浸满变压器油,所述油箱外侧安装有散热器组件,所述散热器组件包括散热片组,所述散热片组包括若干散热片、固定若干散热片的汇聚条以及进油管和出油管,所述散热片内部中空且竖向设置,所述进油管一端与若干所述散热片上端连通,另一端与所述油箱上部连通,所述出油管一端与若干所述散热片下端连通,另一端与所述油箱下部连通,所述进油管与所述散热片连通的一端向下圆弧弯折设置,所述进油管连通所述油箱的一端水平朝向设置。本申请具有充分利用散热提高散热的效果。(The application relates to an oil-immersed transformer, which belongs to the field of transformers. It includes the oil tank and installs iron core and winding in the oil tank, be full of transformer oil in the oil tank, radiator unit is installed in the oil tank outside, radiator unit includes fin group, fin group includes the strip that assembles of a plurality of fin, fixed a plurality of fin and advances oil pipe and go out oil pipe, inside cavity and the vertical setting of fin, advance oil pipe one end and a plurality of fin upper end intercommunication, the other end with oil tank upper portion intercommunication, it is with a plurality of to go out oil pipe one end the fin lower extreme intercommunication, the other end with oil tank lower part intercommunication, advance oil pipe with the setting is buckled to the downward circular arc of one end of fin intercommunication, advance oil pipe intercommunication the one end level orientation setting of oil tank. This application has make full use of heat dissipation and improves radiating effect.)

1. An oil-immersed transformer, its characterized in that: including oil tank (1) and install iron core and winding in oil tank (1), be flooded with transformer oil in oil tank (1), radiator module (2) is installed in oil tank (1) outside, radiator module (2) includes fin group, fin group includes the strip and advance oil pipe (41) and go out oil pipe (42) of assembling of a plurality of fin (5), a plurality of fixed fin (5), inside cavity and vertical setting of fin (5), advance oil pipe (41) one end and a plurality of fin (5) upper end intercommunication, the other end with oil tank (1) upper portion intercommunication, go out oil pipe (42) one end and a plurality of fin (5) lower extreme intercommunication, the other end with oil tank (1) lower part intercommunication, advance oil pipe (41) with the downward circular arc of one end of fin (5) intercommunication is buckled and is set up, the oil inlet pipe (41) is communicated with one end of the oil tank (1) and is horizontally arranged.

2. An oil filled transformer according to claim 1, characterized in that: install main impeller (71) in oil pipe (42), radiator module (2) still include flabellum (73), main impeller (71) with flabellum (73) are through transmission system association.

3. An oil filled transformer according to claim 2, characterized in that: the fan blade (73) is externally connected with a power supply, the oil tank (1) is provided with a liquid thermometer, and the liquid thermometer is associated with a control system of the fan blade (73).

4. An oil filled transformer according to claim 2, characterized in that: an auxiliary impeller (72) is installed in the radiating fin (5), and the auxiliary impeller (72) is connected with the fan blades (73) through a transmission system.

5. An oil filled transformer according to claim 4, characterized in that: the oil outlet pipe (42) has many, the quantity of flabellum (73) with oil outlet pipe (42) is unanimous, every main impeller (71) in oil outlet pipe (42) corresponds one flabellum (73), flabellum (73) correspond a plurality ofly fin (5) and with correspond in fin (5) sub-impeller (72) are correlated.

6. An oil filled transformer according to claim 2, characterized in that: one end of the rotating shaft of the main impeller (71) penetrates through the oil outlet pipe (42), and the rotating shaft of the main impeller (71) is associated with the rotating shaft of the fan blades (73) through a transmission system.

7. An oil filled transformer according to claim 2, characterized in that: the utility model discloses a fan blade, including main impeller (71), carousel (711), carousel (741), magnet (742) are installed to the off-centre on the link plate (741) that link plate (741) is installed outside oil pipe (42), the pivot of main impeller (71) rotate install in oil pipe (42), rotation groove (4211) have been seted up to the pipe wall of oil pipe (42), install carousel (711) on main impeller (71), carousel (711) are located in rotation groove (4211), carousel (711) orientation the lateral wall off-centre of rotating groove (4211) is installed magnet (712), oil pipe (42) outer rotation install with carousel (711) correspond, off-centre on link plate (741) is installed magnet (742), link plate (741) with link through transmission system between flabellum (73).

8. An oil filled transformer according to claim 1, characterized in that: be provided with conservator (3) on oil tank (1), conservator (3) with oil tank (1) intercommunication, be provided with respirator (83) on conservator (3), respirator (83) are through one respiratory tube (82) install in on conservator (3), respiratory tube (82) one end with conservator (3) cavity wall intercommunication, respiratory tube (82) other end downwardly extending sets up and is located conservator (3) below, respirator (83) install in respiratory tube (82) keep away from the one end of conservator (3), respirator (83) include drier (831) and container (832) of settling drier (831), container (832) with respiratory tube (82) are connected and are provided with the oil blanket.

9. An oil filled transformer according to claim 8, characterized in that: install closure (81) in conservator (3), closure (81) are including closing film (811) and floating rod (812), floating rod (812) one end is located in conservator (3), the other end is located in respiratory tube (82), closing film (811) are used for sealing respiratory tube (82) and install in floating rod (812) are located one end in conservator (3), install on floating rod (812) and can be in floating block (814) in transformer oil.

10. An oil filled transformer according to claim 8, characterized in that: be provided with annular diaphragm (837) in container (832), annular diaphragm (837) outer edge butt the chamber wall on container (832), be provided with desiccant cylinder (834) in container (832), desiccant cylinder (834) upper end is equipped with step face (835) that supply annular diaphragm (837) to settle, desiccant cylinder (834) top is provided with circular cone pinnacle (836) and coaxial seting up there is gas pocket (838).

Technical Field

The application relates to the field of transformers, in particular to an oil-immersed transformer.

Background

The oil-immersed transformer is a novel high-performance transformer with more reasonable structure and better performance, and takes oil as the main insulation means of the transformer and depends on the oil as a cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, forced oil circulation and the like. The main parts of the transformer comprise an iron core, a winding, an oil tank, an oil conservator, a respirator, a pressure relief valve, a radiator, an insulating sleeve, a tap switch, a gas relay, a thermometer, an oil purifier, an oil level indicator and the like.

Traditional oil-immersed transformer carries out the heat through the radiator fin of the outer installation of oil tank and scatters and disappears, and outside the heat of transformer oil distributes the oil tank through the radiator fin, radiator fin mainly used increased heat radiating area, nevertheless because hot oil come-up, the sunken reason of cold oil, the radiating effect that the radiator fin performance of oil tank lower part appears easily is not good, leads to whole radiating efficiency not good.

Disclosure of Invention

In order to effectively utilize the fin to improve the radiating effect, this application provides an oil-immersed transformer.

The application provides an oil-immersed transformer adopts following technical scheme:

the utility model provides an oil-immersed transformer, includes the oil tank and installs iron core and winding in the oil tank, be full of transformer oil in the oil tank, radiator unit is installed in the oil tank outside, radiator unit includes fin group, fin group includes a plurality of fin, a plurality of fixed fin assemble the strip and advance oil pipe and go out oil pipe, the inside cavity of fin and vertical setting, advance oil pipe one end and a plurality of fin upper end intercommunication, the other end with oil tank upper portion intercommunication, it is a plurality of with a plurality of fin lower extreme intercommunication, the other end with oil tank lower part intercommunication, advance oil pipe with the setting is buckled to the downward circular arc of one end of fin intercommunication, advance oil pipe intercommunication the one end level orientation setting of oil tank.

By adopting the technical scheme, the transformer oil at the top in the oil tank is fed into the radiating fin through the oil inlet pipe, the transformer oil in the radiating fin dissipates heat into the air through the radiating fin, the transformer oil with lower temperature in the radiating fin sinks and is fed into the bottom of the oil tank through the oil outlet pipe, so that the transformer oil is driven to circulate between the radiating fin and the oil tank, the transformer oil with higher temperature enters the radiator for radiating, the transformer oil with lower temperature after radiating flows back to the oil tank, the oil liquid flows through the radiating fin more quickly under the driving of inertia force, so that the radiating fin is utilized more fully for radiating, one end of the oil inlet pipe communicated with the oil tank faces horizontally, so that the transformer oil with high temperature at the top layer is better fed into the radiating fin, the phenomenon that the lower layer of transformer oil is brought in under the inertia effect, the energy loss caused by the collision of the transformer oil and the top wall of the oil tank is reduced, and the transformer oil flows into the radiator better, one end of the oil inlet pipe connected with the radiating fin is bent in an arc shape, so that the transformer oil is smoothly fed into the radiating fin, the loss of inertial energy is reduced, and the circulation is accelerated.

Optionally, a main impeller is installed in the oil outlet pipe, the radiator assembly further includes a fan blade, and the main impeller is associated with the fan blade through a transmission system.

By adopting the technical scheme, the main impeller is arranged in the oil outlet pipe, the main impeller is driven through the circulation of the transformer oil, and the main impeller drives the fan blades to rotate, so that the fan blades are improved to drive air to flow, the heat dissipation of the radiating fins is realized, the cooling is accelerated, the cooled transformer oil sinks and further drives the main impeller to rotate, and the circulation of the transformer oil is accelerated.

Optionally, the fan blades are externally connected with a power supply, a liquid thermometer is arranged on the oil tank, and the liquid thermometer is associated with the control system of the fan blades.

Through adopting above-mentioned technical scheme, detect the temperature of transformer oil through the liquid thermometer for when the temperature of transformer oil was too high, can initiatively open and accelerate the rotation of flabellum, the flabellum is reverse to drive the main impeller rotatory, thereby flow and under the condition of cooling down with higher speed at the air with higher speed, accelerate the circulation of transformer oil, further more effectual radiating effect who exerts the fin.

Optionally, an auxiliary impeller is mounted in the heat dissipation sheet, and the auxiliary impeller is associated with the fan blades through a transmission system.

By adopting the technical scheme, the auxiliary impeller is arranged in the radiating fin, the energy of flowing transformer oil is further utilized, the auxiliary impeller is also associated with the fan blades, so that the main impeller, the auxiliary impeller and the fan blades form a mutually associated whole, the main impeller and the auxiliary impeller can better drive the fan blades, meanwhile, the fan blades can drive the main impeller and the auxiliary impeller to rotate, and further the transformer oil is driven to circulate, wherein the main impeller and the auxiliary impeller have the greatest effect of supplementing the kinetic energy of the fan blades, the energy consumption of heat dissipation is reduced, and the energy of circulating flow in the heat dissipation process of the transformer oil is utilized more.

Optionally, the oil outlet pipe has many, the quantity of flabellum with the oil outlet pipe is unanimous, every main impeller in the oil outlet pipe corresponds one the flabellum, the flabellum corresponds a plurality ofly the fin and with correspond in the fin the auxiliary impeller is relevant.

By adopting the technical scheme, the auxiliary impellers are associated with one fan blade, the plurality of radiating fins are radiated through one fan blade, the structure is simplified, and meanwhile, the self-heating equipment is reduced, so that a better radiating effect is achieved, the auxiliary power is supplemented to the fan blade by the auxiliary impeller wheels, and the energy source is further reduced.

Optionally, the oil outlet pipe is run through to the pivot one end of main impeller, the pivot of main impeller with through transmission system association between the pivot of flabellum.

Optionally, the rotating shaft of the main impeller is rotatably installed in the oil outlet pipe, a rotating groove is formed in the pipe wall of the oil outlet pipe, a rotating disc is installed on the main impeller, the rotating disc is located in the rotating groove, a magnetic block is eccentrically installed on the side wall, facing the rotating groove, of the rotating disc, an association disc corresponding to the rotating disc is rotatably installed outside the oil outlet pipe, a magnet is eccentrically installed on the association disc, and the association disc is associated with the fan blades through a transmission system.

Through adopting above-mentioned technical scheme, the magnet cooperation on the magnetic path on the carousel and the relevant dish for carousel and relevant dish can the mutual drive rotation, simultaneously because this kind of structure, need not destroy the integrality of oil pipe, thereby keep radiator module's leakproofness in the at utmost, make transformer oil be difficult to leak more.

Optionally, be provided with the conservator on the oil tank, the conservator with the oil tank intercommunication, be provided with the respirator on the conservator, the respirator passes through one the breathing tube install in on the conservator, breathing tube one end with the wall intercommunication on the conservator, breathing tube other end downwardly extending sets up and is located the conservator below, the respirator install in the breathing tube is kept away from the one end of conservator, the respirator includes the container of drier and arrangement drier, the container with the breathing tube is connected and is provided with the oil blanket.

Through adopting above-mentioned technical scheme, the conservator is used for storing transformer oil, when transformer oil is not enough in the oil tank, can carry out transformer oil's replenishment to the oil tank through the conservator, when transformer oil in the oil tank is too much, transformer oil can flow into the conservator and keep in, the volume change that leads to along with transformer oil temperature variation, transformer oil can flow between conservator and oil tank, thereby adapt to transformer oil's volume change, the setting of breathing pipe and respirator, make the conservator be connected with the atmosphere, it is more smooth and easy that transformer oil flows, the drier of settling in the respirator is used for filtering and the air of dry inflow conservator simultaneously, thereby guarantee the cleanness of air in the conservator, the roof intercommunication of breathing pipe and conservator, make transformer oil be difficult to ooze through the breathing pipe.

Optionally, install the closure in the conservator, the closure includes closing film and floating rod, floating rod one end is located in the conservator, the other end is located in the breathing tube, the closing film is used for sealing the breathing tube install in the floating rod is located one end in the conservator, install the kicking block that can float in transformer oil on the floating rod.

Through adopting above-mentioned technical scheme, the setting of closure for when transformer oil in the conservator is too much, can seal the respiratory tube through the closure, thereby prevent transformer oil's excessive, when transformer oil overflows in the respiratory tube, the kicking block drives the float rod and floats, and the opening of respiratory tube is sealed to the last sealing film of float rod, under transformer oil's oil pressure effect, the better sealing respiratory tube of sealing film.

Optionally, an annular diaphragm is arranged in the container, the outer edge of the annular diaphragm abuts against the upper cavity wall of the container, a drying agent cylinder is arranged in the container, a step surface for the annular diaphragm to be placed is arranged at the upper end of the drying agent cylinder, and a conical tip is arranged at the top of the drying agent cylinder and is coaxially provided with an air hole.

Through adopting above-mentioned technical scheme, the drier section of thick bamboo in the container supplies the drier to settle, the setting of annular diaphragm is used for sealing the cavity that forms between a drier section of thick bamboo and the container, when transformer oil spills over, because transformer oil's adhesive capacity, transformer oil flows into the container along the pipe wall of breathing pipe, to certain quality when transformer oil is more, annular diaphragm moves down, make transformer oil flow in the cavity between a drier section of thick bamboo and the container inner wall, keep the drying effect of container, can temporarily store the transformer oil that partly leaks simultaneously again, the circular cone pinnacle of drier section of thick bamboo setting is seted up the gas pocket, when making the air circulation smooth and easy, transformer oil is difficult to get into a drier section of thick bamboo.

To sum up, the transformer oil at the top in the oil tank is sent into the radiating fin through the oil inlet pipe, the transformer oil in the radiating fin dissipates heat to the air through the radiating fin, the transformer oil with lower temperature in the radiating fin sinks to be sent into the bottom of the oil tank through the oil outlet pipe, further the transformer oil is driven to circulate between the radiating fin and the oil tank, the transformer oil with higher temperature enters the radiator to dissipate heat, the transformer oil with lower temperature flows back to the oil tank after heat dissipation, the oil liquid flows through the radiating fin more quickly under the driving of inertia force, so that the heat dissipation is carried out by more fully utilizing the radiating fin, one end of the oil inlet pipe communicated with the oil tank faces horizontally, thereby the transformer oil with high temperature at the top layer is better sent into the radiating fin, the lower layer of transformer oil is brought in under the inertia effect, the energy loss of collision between the transformer oil and the top wall of the oil tank is reduced, the oil inlet pipe is better flowed into the radiator, and the end connected with the radiating fin is bent in an arc shape, therefore, the transformer oil is smoothly sent into the radiating fins, the loss of inertial energy is reduced, and the circulation is accelerated.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic view of the mounting structure of the heat sink assembly in the embodiment of the present application;

FIG. 3 is a schematic diagram of the flow of transformer oil in the middle of the heat sink in the embodiment of the present application;

FIG. 4 is a cross-sectional view of the main impeller mounting tube in an embodiment of the present application;

FIG. 5 is a schematic structural view of a respirator assembly in an embodiment of the present application;

FIG. 6 is a cross-sectional view of the closure of the embodiment of the present application in one state;

FIG. 7 is a cross-sectional view of the closure of the embodiment of the present application in another state;

FIG. 8 is a cross-sectional view of a respirator in an embodiment of the present application.

Description of reference numerals: 1. an oil tank; 2. a heat sink assembly; 3. an oil conservator; 41. an oil inlet pipe; 42. an oil outlet pipe; 421. a main impeller mounting tube; 4211. a rotating groove; 5. a heat sink; 61. an upper convergence strip; 62. a lower convergence strip; 71. a main impeller; 711. a turntable; 712. a magnetic block; 72. a secondary impeller; 73. a fan blade; 74. a first pulley; 741. an association tray; 742. a magnet; 75. a second pulley; 76. a first geared pulley; 77. a second gear pulley; 78. a driving gear; 79. a driven gear; 8. a respirator assembly; 81. a sealer; 811. a sealing film; 812. a float rod; 813. a framework plate; 814. floating blocks; 815. a limiting block; 816. a rubber layer; 817. temporarily storing the oil hole; 82. a breathing tube; 83. a respirator; 831. a desiccant; 832. a container; 833. connecting blocks; 834. a desiccant cartridge; 835. a step surface; 836. a conical tip; 837. an annular diaphragm; 838. air holes; 84. a temporary storage box; 9. and (5) storing the tumor.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses an oil-immersed transformer.

Referring to fig. 1, an oil-immersed transformer includes an oil tank 1, an iron core and a winding installed in the oil tank 1, a radiator assembly 2 installed on one side of the oil tank 1, and an oil conservator 3 installed on the oil tank 1, wherein the oil tank 1 is filled with transformer oil, the oil conservator 3 is located above the oil tank 1 and is communicated with the upper portion of the oil tank 1, and the oil conservator 3 is used for storing excessive transformer oil and supplementing the transformer oil when the oil in the oil tank 1 is insufficient.

Referring to fig. 1, there are two sets of radiator module 2, two sets of radiator module 2 divide and establish on the both sides wall of 1 width direction of oil tank, radiator module 2 is including advancing oil pipe 41, a plurality of fin 5, the strip and the play oil pipe 42 of assembling of fixed a plurality of fin 5, it has a plurality ofly to advance oil pipe 41, a plurality of advance oil pipe 41 sets up along 1 length direction interval of oil tank, advance oil pipe 41 one end horizontal opening setting and with 1 top intercommunication of oil tank, the setting is buckled to 90 degrees circular arcs downwards to the other end, assemble the strip and include and assemble strip 61 and assemble strip 62 down, it extends the setting and is located a plurality of advance oil pipe 41 belows along 1 length direction of oil tank to assemble strip 61 on, the one end that a plurality of advance oil pipe 41 and buckle downwards all assembles strip 61 intercommunication setting with last.

Referring to fig. 1, there are two oil outlet pipes 42, two oil outlet pipes 42 are arranged along the length direction of the oil tank 1 at intervals, one end of the oil outlet pipe 42 is communicated with the lower portion of the oil tank 1, the other end of the oil outlet pipe is bent upwards by 90 degrees, the lower convergence strip 62 is located above the two oil outlet pipes 42, and meanwhile, the two oil outlet pipes 42 are communicated with the lower convergence strip 62.

Referring to fig. 1, the inside cavity of fin 5 and vertical setting, fin 5 is located and assembles between 61 and the lower strip 62 that assembles, and fin 5 from top to bottom respectively with assemble 61 and assemble 62 intercommunication down with on, a plurality of fin 5 are along assembling strip length direction interval arrangement, make transformer oil can send into and assemble 61 on through advancing oil pipe 41, then assemble strip 62 under the heat dissipation reentrant of fin 5, get back to oil tank 1 through oil pipe 42 at last, wherein assemble the strip and can be connected through the support and the lateral wall of oil tank 1, thereby improve the firmness that radiator module 2 installed on oil tank 1.

Referring to fig. 1, 2 and 3, at the same time, the radiator assembly 2 further includes a main impeller 71, an auxiliary impeller 72, fan blades 73 and a transmission system, one end of the oil outlet pipe 42 communicating with the lower convergence strip 62 is provided with a disc-shaped main impeller mounting pipe 421, an axis of the main impeller mounting pipe 421 is perpendicular to an axis of the end of the oil outlet pipe 42, the main impeller 71 is rotatably mounted in the main impeller mounting pipe 421 through a shaft, a middle portion of the fan blades is protruded in a cylindrical shape, and the wall thickness of the whole shell of the radiating fin 5 is kept unchanged, so that the middle part of the radiating fin 5 is a cylindrical cavity, the cavity in the middle part of the radiating fin 5 is an eccentric cavity and is used for rotatably mounting the auxiliary impeller 72, i.e. the axis of the cavity in the middle of the heat sink 5 is not in the symmetry plane of the cavity at other locations of the heat sink 5, because the cavity in the middle of the radiating fin 5 is eccentrically arranged, the auxiliary impeller 72 always receives the impact of flowing liquid on one side and stably rotates in one direction.

Referring to fig. 1 and 2, there are two fan blades 73, the two fan blades 73 are installed on the side wall of the oil tank 1 at intervals and externally connected with a power supply, so that the fan blades 73 can rotate actively, a liquid thermometer is arranged on the oil tank 1, the temperature of transformer oil in the oil tank 1 is detected by the liquid thermometer, the liquid thermometer is associated with a control system of the fan blades 73, the opening and closing of the fan blades 73 are controlled by the temperature fed back by the liquid thermometer, when the temperature of the transformer oil is too high, the fan blades 73 are started to dissipate heat in an accelerated manner, the two fan blades 73 are located on the upper sides of the two oil outlet pipes 42 in a one-to-one correspondence manner, the two fan blades 73 and the two main impellers 71 are associated in a one-to-one transmission manner by a transmission system, and meanwhile, the plurality of auxiliary impellers 72 on the plurality of cooling fins 5 are divided into two parts and are respectively associated with the two sets of fan blades 73 and the main impellers 71 in a one-to-one correspondence manner.

Referring to fig. 1 and 2, the transmission system may be composed of a gear system and a pulley system, wherein the gears and pulleys are rotatably mounted on a side wall of the oil tank 1, the pulley system includes a first pulley 74, a second pulley 75, a first gear pulley 76 and a second gear pulley 77, each fan blade 73 corresponds to one first pulley 74, the fan blade 73 rotates synchronously with the corresponding first pulley 74, each main impeller 71 corresponds to one second pulley 75, the main impeller 71 rotates synchronously with the corresponding second pulley 75, the gear system includes a driving gear 78 and a driven gear 79 which are engaged with each other, the driving gear 78 and the driven gear 79 are rotatably mounted on a wall of the oil tank 1, the driving gear 78 and the driven gear 79 are alternately engaged with each other, the first gear pulley 76 and the second gear pulley 77 are mounted on the driven gear 79 and move synchronously with the driven gear 79, the first gear pulley 76 is in transmission connection with the first pulley 74 through a belt, the second gear pulley 77 is in transmission connection with the second pulley 75 through a belt, the driving gear 78 is in one-to-one corresponding transmission association with the auxiliary impeller 72, the driving gear 78 and the auxiliary impeller 72 can be in shaft association or magnetic attraction association, and the second pulley 75 and the main impeller 71 can be in shaft association or magnetic attraction association.

When the shaft association is adopted, the main impeller 71 and the second belt pulley 75 share one rotating shaft, the main impeller 71 is fixedly connected with the rotating shaft, the second belt pulley 75 is fixedly connected with the rotating shaft, the mechanical sealing mode can be adopted, the possibility of transformer oil leakage is reduced, and a similar structure can be adopted between the driving gear 78 and the auxiliary impeller 72.

Referring to fig. 4, when magnetic coupling is adopted, a rotating shaft of the main impeller 71 is rotatably installed in the main impeller installation pipe 421, a rotating groove 4211 is formed in a pipe wall of the main impeller installation pipe 421 close to one side of the first belt pulley 74, a rotating disc 711 is integrally and coaxially arranged on the main impeller 71, the rotating disc 711 is located in the rotating groove 4211, a magnetic block 712 is eccentrically installed on a side wall of the rotating disc 711 facing the rotating groove 4211, a related coupling disc 741 is integrally arranged on one side of the first belt pulley 74 facing the main impeller installation pipe 421, and a magnet 742 is eccentrically installed on the related coupling disc, so that the rotating disc 711 and the related coupling disc 741 can keep synchronous rotation to a certain extent through attraction between the magnetic block 712 and the magnet 742, and correspondingly, a similar structure can also be adopted between the driving gear 78 and the auxiliary impeller 72.

Referring to fig. 1 and 5, a breather assembly 8 for communicating the conservator 3 with the atmosphere is arranged on the conservator 3, the breather assembly 8 comprises a sealer 81, a breathing tube 82, a breather 83 and a temporary storage tank 84, one end of the breathing tube 82 is communicated with the top of the conservator 3, and the other end of the breathing tube 82 extends downwards against the wall of the oil tank 1 and is connected with the breather 83.

Referring to fig. 1 and 6, the sealer 81 is located at one end where the breathing tube 82 is communicated with the conservator 3, when oil overflows through the sealer 81, the breathing tube 82 is sealed, so that transformer oil is not prone to leakage, the sealer 81 includes a sealing film 811 and a floating rod 812, one end of the breathing tube 82, which is connected with the conservator 3, is vertically arranged, one end of the floating rod 812 is located in the conservator 3, the other end of the floating rod is located in the breathing tube 82, one end of the floating rod 812, which is located in the conservator 3, is provided with a framework plate 813, the framework plate 813 is a circular plate, the sealing film 811 wraps outside the framework plate 813, the framework plate 813 enables the sealing film 811 to have certain rigidity, and the sealing film 811 is used for sealing one end, which is connected with the conservator 3, of the breathing tube 82.

The lower part cover that the float pole 812 is located breathing pipe 82 part is equipped with float piece 814, float piece 814's density is less than transformer oil for float piece 814 can drive float pole 812 come-up under transformer oil's drive, and then drives the sealed membrane 811 come-up and seal breathing pipe 82, and the orificial inner wall of breathing pipe 82 is provided with stopper 815 simultaneously, restricts float piece 814 through stopper 815, makes float pole 812 can not drop out breathing pipe 82.

Referring to fig. 6 and 7, a storage bump 9 is arranged at one end of the breather pipe 82 connected with the conservator 3, the storage bump 9 is spherical, a rubber layer 816 is sleeved on the upper part of the floating rod 812, which is located inside the breather pipe 82, a floating block 814 is located outside the rubber layer 816, and a temporary storage oil hole 817 is arranged in the floating rod 812, the temporary storage oil hole 817 is through the rubber layer 816 on the floating rod 812, the rubber layer 816 is wrapped outside the floating rod 812, and the floating block 814 further limits the rubber layer 816, when the oil is excessive, the oil can blow the rubber layer 816 through the temporary storage oil hole 817, so that the rubber layer 816 bulges at the position of the storage bump 9, on one hand, when the oil volume is too large, partial transformer oil can be temporarily stored through the rubber layer 816, the pressure of the conservator 3 is relieved, on the other hand, when the oil volume is over-limited, the rubber layer 816 is broken, the risk that the oil tank 1 and the conservator 3 are completely damaged is reduced, and the risk of the oil seeps out integrally is reduced.

Referring to fig. 8, the breather 83 includes a desiccant 831 and a container 832 for accommodating the desiccant 831, a connection block 833 is disposed at the upper end of the container 832, the connection block 833 is also disposed at the lower end of the breathing tube 82, an oil seal is mounted between the two connection blocks 833 and fixed by a bolt, connection between the container 832 and the breathing tube 82 is realized, a desiccant cylinder 834 is integrally disposed at the bottom of a cavity inside the container 832, the desiccant cylinder 834 is coaxial with the container 832, a step surface 835 and a conical tip 836 are disposed at the upper end of the desiccant cylinder 834, an annular membrane 837 is disposed between the step surface 835 and the top of the cavity inside the container 832, the outer edge of the annular membrane 837 abuts against the upper wall of the container 832, the inner edge of the annular membrane 837 abuts against the step surface 835, an air hole 838 is coaxially disposed at the top of the conical tip 836, and the bottom of the desiccant cylinder 834 is a filter screen through which the air can flow and the desiccant 831 cannot easily pass.

Referring to fig. 5 and 8, the holding tank 84 is mounted on the wall of the oil tank 1, and the top of the holding chamber communicates with the bottom of the container 832, so that the transformer oil flowing between the inner wall of the container 832 and the desiccant cartridge 834 can flow into the holding tank 84.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.