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CN-121260637-B - Dry-type transformer cooling device with intelligent wind direction guiding function

CN121260637BCN 121260637 BCN121260637 BCN 121260637BCN-121260637-B

Abstract

The invention belongs to the technical field of power transmission and distribution equipment, in particular to a dry-type transformer cooling device with an intelligent wind direction guiding function, which comprises two groups of double-layer frames, wherein an iron core is arranged between the two groups of double-layer frames, a supporting seat is arranged at the top of the double-layer frame positioned below the double-layer frame, the invention aims at solving the problems that the traditional cooling air flow cannot effectively enter into the deep region and the top of the inside of a winding, a heat dissipation dead zone exists, local overheating is caused, the efficiency is low, and the invention adopts the design of an accurate air supply unit, the annular array type cooling device has the advantages that the annular array type cooling device realizes omnibearing and dead angle-free cooling from the core inside the winding to the axial height through the cooperation of upward vertical cooling of the first fan against the main pore canal, vertical jet cooling of the second fan inside the low-voltage winding and penetrating cooling of the third fan along the transverse groove, effectively covers the back, inner deep and top areas of the winding which cannot be reached by traditional air cooling, and fundamentally prevents local hot spots.

Inventors

  • ZHU CHUNHAI

Assignees

  • 浙江双鹏电器股份有限公司

Dates

Publication Date
20260508
Application Date
20251113

Claims (9)

  1. 1. The dry-type transformer cooling device with the intelligent wind direction guiding function comprises two groups of double-layer frames (1) and is characterized in that an iron core (11) is arranged between the two groups of double-layer frames (1), a supporting seat (12) is arranged at the top of the double-layer frame (1) positioned below, a high-voltage winding (13) and a low-voltage winding (14) are respectively arranged at the top of the supporting seat (12) from outside to inside, the high-voltage winding (13) and the low-voltage winding (14) are sleeved and provided with a main duct positioned between the high-voltage winding and the low-voltage winding (14), and layered cushion blocks (15) in annular arrays are arranged at the upper end and the lower end of the high-voltage winding (13) and the lower end of the low-voltage winding (14); the accurate air supply unit (2) is arranged on the supporting seat (12) and is used for conveying cooling air flow into the main pore canal; the intelligent flow guiding unit (3) is arranged on the supporting seat (12) and is adjacent to the accurate air supply unit (2) and used for guiding and distributing the flow direction of the cooling air flow; the temperature sensing network comprises a threading piece (16) which is arranged below the layered cushion block (15) and positioned in the main pore canal, and temperature sensors (161) are arranged at the bottom, the middle and the top of the threading piece (16) and used for monitoring the temperature distribution of the main pore canal in real time.
  2. 2. The dry-type transformer cooling device with intelligent wind direction guiding function according to claim 1, wherein the top of the supporting seat (12) is provided with an arc-shaped groove (121) in a ring array, the arc-shaped groove (121) corresponds to the main duct, the front and rear sides of the high-voltage winding (13) and the low-voltage winding (14) are provided with transverse grooves (130), and the accurate air supply unit (2) comprises: The first fans (21) are arranged in a group, and each group of the first fans (21) is arranged in the arc-shaped groove (121); the second fan (22) is arranged at the bottom of the supporting seat (12) and corresponds to the inner side wall of the low-voltage winding (14); an open slot (23) which is arranged on one side of the first fan (21) close to the center of the low-voltage winding (14) and is used for placing the second fan (22); the vertical groove (24) is formed at the top of the open groove (23) and is communicated with the open groove (23) for spraying cooling air flow upwards to the inside of the low-voltage winding (14); The number of the electric sliding rails (25) is two, and the electric sliding rails are symmetrically arranged at the front end and the rear end of the double-layer frame (1) and correspond to the supporting seats (12); the number of the electric sliding blocks (26) is two, and the electric sliding blocks are connected to the electric sliding rail (25) in a sliding way; And the third fan (27) is arranged on one side of the electric sliding block (26) close to the supporting seat (12), and the outlet of the third fan (27) corresponds to the transverse groove (130).
  3. 3. A dry transformer cooling device with intelligent wind direction guiding function according to claim 2, characterized in that the arc of the arc-shaped slot (121) is one quarter of the supporting seat (12).
  4. 4. The dry-type transformer cooling device with the intelligent wind direction guiding function according to claim 2, wherein the transverse groove (130) comprises an orientation groove (131) and a crescent groove (132), the orientation groove (131) is formed at the front end and the rear end of the high-voltage winding (13) and the low-voltage winding (14), and the crescent groove (132) is formed on the inner walls of the high-voltage winding (13) and the low-voltage winding (14) and is communicated with the orientation groove (131).
  5. 5. The dry-type transformer cooling device with intelligent wind direction guiding function according to claim 4, wherein the left and right ends of the crescent groove (132) extend along the circumferential direction of the high-voltage winding (13) and the low-voltage winding (14) to the radial middle position of the high-voltage winding (13) and the low-voltage winding (14).
  6. 6. The dry-type transformer cooling device with intelligent wind direction guiding function according to claim 4, wherein the transverse grooves (130) at the front and rear ends of the high-voltage winding (13) and the low-voltage winding (14) are arranged in a staggered manner, and adjacent transverse grooves (130) form complementary airflow channel structures in the circumferential direction.
  7. 7. The dry-type transformer cooling device with intelligent wind direction guiding function according to claim 6, wherein the top of the transverse slot (130) is provided with symmetrically arranged directional plates (133), and the directional plates (133) uniformly guide the cool air to the directional slots (131).
  8. 8. The dry-type transformer cooling device with intelligent wind direction guiding function according to claim 4, wherein a flat tuyere (271) is installed at the outlet end of the third fan (27), the outlet cross-section shape of the flat tuyere (271) is adapted to the inlet cross-section shape of the directional groove (131), and the inlet ends of the transverse grooves (130) of the high-voltage winding (13) and the low-voltage winding (14) are arranged in an expanded structure.
  9. 9. The dry-type transformer cooling device with the intelligent wind direction guiding function according to claim 2, wherein the top surface of the supporting seat (12) is provided with an inward concave circular groove (122), and the intelligent flow guiding unit (3) comprises a driving gear (31), a driving rod (32), a driven gear (33) and a flow guiding plate (34); a drive gear (31) rotatably provided in the circular groove (122); A drive lever (32) rotatably fitted in the circular groove (122) in the radial direction of the support base (12); The driven gear (33) is fixedly arranged on the driving rod (32) and meshed with the driving gear (31), the guide plates (34) are arranged along the tops of the arc-shaped grooves (121) in a one-to-one correspondence mode, and one end of each guide plate (34) is fixedly arranged at a position, close to the center of the supporting seat (12), of the driving rod (32).

Description

Dry-type transformer cooling device with intelligent wind direction guiding function Technical Field The invention belongs to the technical field of power transmission and distribution equipment, and particularly relates to a dry-type transformer cooling device with an intelligent wind direction guiding function. Background The dry type transformer is widely applied to occasions such as urban power supply, rail transit, data centers and the like due to the advantages of fire prevention, environmental protection and the like, the heat dissipation performance of the dry type transformer directly determines the operation life, overload capacity and volume miniaturization level of the transformer, and at present, the common traditional heat dissipation mode, especially on a large-capacity dry type transformer, is mainly implemented by installing axial flow fans at two sides or the bottom of the transformer for forced air cooling, however, the traditional cooling mode has the following two remarkable problems: 1. The traditional air cooling adopts a mode of arranging fans on two sides or the bottom of a transformer in a straight line to cool the surface of a winding, the mode belongs to rough external cooling, cooling air flow cannot effectively enter deep areas and top areas inside the winding, a heat dissipation path is long, heat resistance is high, cooling efficiency is low, especially for a large-sized cylindrical winding, a leeward surface and an internal channel of the large-sized cylindrical winding are extremely easy to form local hot spots due to insufficient wind speed and air quantity, the hot spots can rapidly accelerate thermal ageing of insulating materials, the main hidden trouble affecting the service life and reliability of the transformer is caused, meanwhile, the improvement of the power density and the exertion of overload capacity of the transformer are limited, and 2, in the traditional air cooling, a fixed and uniform cooling air duct is shared by high-voltage windings, however, due to the difference of electromagnetic design and operation load, the heating values of the high-voltage windings and the low-voltage windings are inconsistent in operation, a fixed cooling system cannot recognize and respond to the difference, the winding with serious heating is not cooled, the winding with serious heating is excessively is cooled, the radial heat imbalance among the windings is formed, and the thermal imbalance between the windings is formed, and the thermal ageing of the insulating materials is in a long-term ageing state. Disclosure of Invention The invention aims to solve two core problems of the traditional air-cooled dry-type transformer, namely that firstly, rough external blowing cooling is adopted, air flow cannot penetrate into the inside and the top of a winding and local hot spots are easy to form, secondly, a high-voltage winding and a low-voltage winding share a fixed cooling air duct, and the difference of heating values of the high-voltage winding and the low-voltage winding cannot be adapted to the radial heat imbalance, so that the insulation aging problem of the hot spot winding is accelerated, and the dry-type transformer cooling device with the intelligent wind direction guiding function is provided. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: The invention discloses a dry-type transformer cooling device with an intelligent wind direction guiding function, which comprises two groups of double-layer frames, wherein an iron core is arranged between the two groups of double-layer frames, a supporting seat is arranged at the top of the double-layer frame positioned below, a high-voltage winding and a low-voltage winding are respectively arranged at the top of the supporting seat from outside to inside, the high-voltage winding and the low-voltage winding are sleeved and provided with a main pore canal positioned between the high-voltage winding and the low-voltage winding, and layered cushion blocks in annular arrays are arranged at the upper end and the lower end of the high-voltage winding and the low-voltage winding; The accurate air supply unit is arranged on the supporting seat and is used for conveying cooling air flow into the main pore canal; The intelligent flow guiding unit is arranged on the supporting seat and adjacent to the accurate air supply unit and used for guiding and distributing the flow direction of the cooling air flow; The temperature sensing network comprises a threading piece which is arranged below the layered cushion block and positioned in the main duct, and temperature sensors are arranged below the threading piece, in the bottom, in the middle and at the top and used for monitoring the temperature distribution of the main duct in real time. Further, the arc groove that is annular array has been seted up at the top of supporting seat, the arc groove corresponds with main pore, both sides are