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CN-121790137-B - Vehicle-mounted transformer with efficient heat dissipation structure

CN121790137BCN 121790137 BCN121790137 BCN 121790137BCN-121790137-B

Abstract

The invention discloses a vehicle-mounted transformer with a high-efficiency heat dissipation structure, which is applied to the field of transformers, wherein a double-cylinder structure formed by combining an inner cylinder and an outer cylinder is adopted, heat transfer is carried out between the inner cylinder and the outer cylinder through circularly flowing insulating oil, and the heat of a transformer body can be efficiently led out from the inner cylinder to the outer cylinder; in order to further enhance heat dissipation, an impeller is arranged between the inner cylinder and the outer cylinder, external air flow is guided through an air pipe penetrating the outer cylinder, the flow of air around the double cylinders is accelerated, and dust is prevented from being introduced while heat dissipation is assisted; in addition, the spiral conveying roller and the impeller driven by the same motor are adopted to cooperatively realize liquid cooling circulation and air cooling heat exchange, so that the overall heat dissipation efficiency is improved, and meanwhile, the energy consumption is reduced.

Inventors

  • OU XIAOHONG

Assignees

  • 成都金之川电子有限公司

Dates

Publication Date
20260508
Application Date
20260309

Claims (9)

  1. 1. The vehicle-mounted transformer with the high-efficiency heat dissipation structure is characterized by comprising an inner cylinder (1), wherein a cylinder cover (2) is connected to the upper end of the inner cylinder (1) in a threaded manner, a mounting frame (3) extending into the inner cylinder (1) is fixedly connected to the lower end of the cylinder cover (2), a circuit board (4) is fixedly connected to the mounting frame (3), and a transformer body (5) is fixedly connected to the circuit board (4); The novel electric motor is characterized in that a plurality of radial pipes (6) which are uniformly distributed in circumference are fixedly communicated with the upper part of the inner barrel (1), the outer ends of the radial pipes (6) are fixedly connected with an outer barrel (7), a clamping cavity (701) is formed in the barrel wall of the outer barrel (7), the outer ends of the radial pipes (6) are communicated with the clamping cavity (701), the lower ends of the inner barrel (1) are fixedly communicated with an axial pipe (8), the lower ends of the axial pipe (8) are fixedly connected with the bottom wall of the outer barrel (7), the lower ends of the axial pipe (8) are communicated with the clamping cavity (701), a spiral conveying roller (9) is arranged in the axial pipe (8), the lower ends of the spiral conveying roller (9) extend to the lower part of the outer barrel (7) and are fixedly connected with an output shaft of a motor (10), and the shell of the motor (10) is fixedly connected with the lower end of the outer barrel (7), and insulating oil is filled in the inner cavity of the inner barrel (1) and the clamping cavity (701). The upper end of the axial tube (8) is rotationally communicated with a rotary drum (11), the outer wall of the rotary drum (11) is fixedly connected with an impeller (13), the inner wall of the rotary drum (11) is fixedly connected with a radial rod (12), the middle part of the radial rod (12) is fixedly connected with the upper end of a spiral conveying roller (9), the inner wall of a clamping cavity (701) is fixedly connected with an air pipe (14), the inner end of the air pipe (14) is communicated with the lower part of the inner cavity of the outer cylinder (7), the outer end of the air pipe (14) extends to the outer side of the outer cylinder (7) and is communicated with the outside atmosphere, the impeller (13) comprises a mounting cylinder (22) fixedly connected with the outer wall of the rotary drum (11), blades (23) which are uniformly distributed circumferentially are arranged on the outer side of the mounting cylinder (22), a rotating shaft (24) is fixedly connected with the inner end of the blades (23), the rotating shaft (24) extends into the mounting cylinder (22) and is rotationally connected with the mounting cylinder (22), one end of the eccentric rod (25) is fixedly connected with a sliding column (26) far away from the rotating shaft (24), the sliding column (27) is slidingly connected with a traction cylinder (27), the upper end of the traction cylinder (27) is provided with the annular groove (22) in a sliding way, the lower end (2701) is connected with the traction cylinder (22), the lower end of the traction cylinder (27) is hinged with a connecting rod (29), the lower end of the connecting rod (29) is hinged with a screw rod module (30), and the screw rod module (30) is used for traction of the connecting rod (29).
  2. 2. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein the inner cylinder (1) and the outer cylinder (7) are of cylindrical structures with openings at the upper ends, an annular cavity is formed between the inner cylinder (1) and the outer cylinder (7), and the impeller (13) is installed in the annular cavity.
  3. 3. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein an inner end opening of the air pipe (14) is arranged below the impeller (13), an outer end opening of the air pipe (14) is arranged above the radial pipe (6), and the outer end opening direction of the air pipe (14) is opposite to the opening direction of the outer cylinder (7).
  4. 4. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein a temperature sensor (18) is fixedly connected to the circuit board (4), and the motor (10) and the temperature sensor (18) are electrically connected to the same controller.
  5. 5. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein the axial tube (8) and the rotary drum (11) are of a cylindrical structure which are coaxially arranged and are communicated with each other, the axial tube (8) comprises an upper tube portion (801) and a lower tube portion (802), wherein the upper end of the upper tube portion (801) is fixedly communicated with the lower end of the inner drum (1), the lower end of the upper tube portion (801) is rotationally connected with the upper end of the rotary drum (11), the upper end of the lower tube portion (802) is rotationally connected with the lower end of the rotary drum (11), and the lower end of the lower tube portion (802) is fixedly connected with the bottom wall of the outer drum (7) and is communicated with the clamping cavity (701).
  6. 6. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein a guide cover (15) is fixedly sleeved on the outer wall of the motor (10), a base (17) is fixedly connected to the lower end of the guide cover (15), the guide cover (15) is fixedly connected with the lower end of the outer cylinder (7), an annular concave cavity communicated with the clamping cavity (701) is formed in the guide cover (15), a guide cylinder (16) is arranged in the annular concave cavity, and the upper end of the guide cylinder (16) is fixedly connected with the inner wall of the clamping cavity (701).
  7. 7. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein a fixed ring (32) is fixedly connected to the lower end of the cylinder cover (2), a floating disc (31) is slidably connected to the fixed ring (32), the floating disc (31) is slidably connected to the inner wall of the inner cylinder (1), and a spring (33) sleeved on the fixed ring (32) is abutted to the upper end of the floating disc (31).
  8. 8. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein a first dust screen (19) is fixedly connected between the inner cylinder (1) and the outer cylinder (7), an air guide cover (20) is fixedly connected to the outer wall of the outer cylinder (7), the outer end of the air pipe (14) extends into the air guide cover (20), and a second dust screen (21) is fixedly connected to the lower end of the air guide cover (20).
  9. 9. The vehicle-mounted transformer with the efficient heat dissipation structure according to claim 1, wherein the mounting cylinder (22) is an annular cylinder with a rectangular cross section, the traction cylinder (27) is an annular cylinder with an I-shaped cross section, symmetrically arranged guide rails (28) are fixedly connected to the outer wall of the lower portion of the axial tube (8), sliding grooves (2702) matched with the guide rails (28) are formed in the inner wall of the traction cylinder (27), and the outer wall of the guide rails (28) is in sliding connection with the inner wall of the sliding grooves (2702).

Description

Vehicle-mounted transformer with efficient heat dissipation structure Technical Field The invention relates to the field of transformers, in particular to a vehicle-mounted transformer with an efficient heat dissipation structure. Background The vehicle-mounted transformer is a key component in mobile electrical systems such as electric vehicles and rail transit and is used for realizing voltage conversion, electrical isolation and energy transmission, and due to the fact that the vehicle running environment is limited in space, frequent in vibration and poor in heat dissipation condition, the traditional air-cooled or natural cooling type transformer is prone to problems of overhigh temperature rise, insulation aging acceleration and the like, the reliability and the service life of the system are affected, heat accumulation is more remarkable especially under the high power density requirement, and the existing heat dissipation structure is prone to defects of low heat dissipation efficiency, easiness in dust accumulation, difficulty in maintenance and the like. The prior patent with publication number CN111415799B discloses a high-efficient radiating new energy automobile transformer, through set up first, second radiating part locating part respectively in shell inner wall front and back side and left and right sides to install corresponding first, second radiating component in the spacing chamber that spacing cassette formed, dispose the radiator fan in second radiating component below simultaneously, make the heat that the transformer body produced by high-efficient conduction and quick discharge, thereby show promotion whole radiating efficiency, ensure the steady operation of new energy automobile transformer under the high load operating mode. The patent application with the prior publication number of CN117275891A discloses a new energy automobile transformer heat abstractor, through setting up the control by temperature change power component that comprises conducting strip, first gasbag, electrode slice and motor in the casing for the gasbag thermal expansion triggers the motor and starts when the transformer generates heat, and motor drive eccentric wheel extrudes the second gasbag, sends into heat exchange A board with hot air through the heat exchange pipe, simultaneously sends back the casing with the interior cold air of heat exchange A board, through cold and hot air circulation replacement, realizes the inside automatic cooling of casing. The above-mentioned prior art discloses the technical scheme that utilizes first, second radiator unit and radiator fan to realize heat quick transfer, still discloses the technical scheme that utilizes conducting strip, first gasbag, electrode slice and motor to realize cold and hot air circulation replacement, however, the prior art still exists not enough, adopts the forced air cooling heat dissipation mode although simple structure, but air heat conductivity is low, and heat transfer efficiency is low, and local heat piles up easily, in addition, radiator fan introduces the dust easily and gets into in the transformer casing, difficult maintenance. Disclosure of Invention The invention has the core that the problems of low cooling and heat dissipation efficiency, local heat accumulation and difficult maintenance in the prior art are solved through the inner cylinder, the outer cylinder and the impeller, and meanwhile, the automatic back blowing cleaning of the dust screen is realized through the impeller with the adjustable blade angle, so that the heat dissipation efficiency and maintainability are improved. In order to solve the problems, the invention adopts the following technical scheme. The vehicle-mounted transformer with the high-efficiency heat dissipation structure comprises an inner cylinder, wherein the upper end of the inner cylinder is in threaded connection with a cylinder cover, the lower end of the cylinder cover is fixedly connected with a mounting frame extending into the inner cylinder, the mounting frame is fixedly connected with a circuit board, and the circuit board is fixedly connected with a transformer body; The upper part of the inner cylinder is fixedly communicated with a plurality of radial pipes which are uniformly distributed in circumference, the outer ends of the radial pipes are fixedly connected with the outer cylinder, a clamping cavity is formed in the cylinder wall of the outer cylinder, the outer ends of the radial pipes are communicated with the clamping cavity, the lower ends of the inner cylinder are fixedly communicated with axial pipes, the lower ends of the axial pipes are fixedly connected with the bottom wall of the outer cylinder, the lower ends of the axial pipes are communicated with the clamping cavity, a spiral conveying roller is arranged in the axial pipes, the lower ends of the spiral conveying roller extend to the lower part of the outer cylinder and are connected with an output shaft of a moto