CN209980920U - A heat sink for power electronic transformers - Google Patents

Abstract

The utility model discloses a heat abstractor for power electronic transformer, including placing the case, place the baffle of the vertical setting of incasement fixedly connected with, the baffle will be placed the case and separate for equipment chamber and working chamber, power electronic transformer is installed to the equipment intracavity, the baffle is improved level and is run through and be equipped with first pivot, first pivot and baffle sliding connection, first pivot is located the one end fixedly connected with fixed block in equipment chamber, install a plurality of blades that are used for blowing on the fixed block, the one end that first pivot is located the working chamber has fixed first cone pulley and fixed plate of having cup jointed in proper order. The utility model discloses utilize plastic blade to dispel the heat to power electronic transformer, avoid adopting metal blade to lead to the fact the influence to the voltage difference of transformer, the blade heat dissipation position is portable simultaneously, carries out even heat dissipation to power electronic transformer, prevents that the uneven mechanical fault that causes of being heated of part position from damaging.

Description

A heat sink for power electronic transformers

technical field

The utility model relates to the technical field of heat dissipation of transformers, in particular to a heat dissipation device for power electronic transformers.

Background technique

In recent years, with the rapid development of DC power grid technology, power electronic transformers have been paid more and more attention. Due to the large capacity, high voltage and high insulation requirements of power electronic transformers, the temperature of the transformer will be higher and higher during operation. Heat dissipation will seriously affect the normal operation of the transformer, so the problem of heat dissipation of the transformer has been paid more and more attention.

At present, the heat dissipation method of the transformer cabinet is generally to open heat dissipation holes on the cabinet body of the transformer cabinet, so as to dissipate heat through natural wind, the heat dissipation efficiency is low, and it will be seriously disturbed by the external environment in hot summer or cold winter. The fan is used for heat dissipation, but the position of the fan blades is fixed, and the heat dissipation is carried out on one side for a long time, which makes the internal heat dissipation uneven, and mechanical failure will also occur, causing damage.

Utility model content

The purpose of the utility model is to propose a heat dissipation device for power electronic transformers in order to solve the shortcomings existing in the prior art.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

A heat dissipation device for a power electronic transformer, comprising a placement box, a vertically arranged partition is fixedly connected in the placement box, the partition divides the placement box into an equipment cavity and a working cavity, and the equipment cavity is A power electronic transformer is installed, a first rotating shaft is horizontally penetrated on the baffle plate, the first rotating shaft is slidably connected with the baffle plate, and one end of the first rotating shaft located in the equipment cavity is fixedly connected with a fixing block, and the fixing block A plurality of blades for blowing are installed on it, and one end of the first rotating shaft located in the working chamber is sequentially fixed and sleeved with a first bevel wheel and a fixed plate, the side wall of the fixed plate is fixedly connected with a motor, and the motor output The end of the shaft is fixedly connected with the first rotating shaft, and a transmission mechanism matched with the first bevel wheel is arranged in the working chamber.

Preferably, the transmission mechanism includes a cross bar slidably connected to the side wall of the partition plate and the inner side wall of the placing box, the lower end surface of the cross bar is fixedly connected with the fixing plate, and the upper end surface of the cross bar is fixedly connected with a vertical bar , the vertical rod is provided with a guide structure, the horizontal rod is vertically penetrated with a second rotating shaft, the upper and lower ends of the second rotating shaft are fixedly sleeved with a second bevel wheel, and the second rotating shaft passes through The bearing is rotatably connected with the cross bar, the second bevel wheel at the lower end of the second rotating shaft meshes with the first bevel wheel, and the second bevel wheel at the upper end of the second rotating shaft is connected with the guide structure.

Preferably, the guide structure includes a third rotating shaft horizontally arranged on the vertical rod, the third rotating shaft is rotatably connected to the vertical rod through a bearing, and one end of the third rotating shaft is slidably connected to the side wall of the partition plate, The other end is fixedly sleeved with a gear, the inner side wall of the placing box is provided with a groove, and the groove is provided with a rack engaged with the gear.

Preferably, both the side wall and the partition of the placing box are provided with ventilation openings.

Preferably, the motor is a four-wire five-phase motor that can control steering and rotational speed.

Preferably, the blades are made of plastic, and the number of the blades is three.

The beneficial effects of the present utility model:

By setting the transmission mechanism and the guide mechanism, when the power electronic transformer needs to be dissipated, the motor is started to rotate forward, which drives the first rotating shaft to rotate forward, so that the blades rotate and the wind is released, and the power electronic transformer is dissipated. When the first rotating shaft rotates, The first bevel wheel is driven to rotate, so that the second rotating shaft rotates, which in turn makes the third rotating shaft rotate. Since the gear arranged on the third rotating shaft meshes with the rack, the third rotating shaft rotates and moves back and forth to drive the The vertical bar and the horizontal bar move laterally, thereby causing the fixed plate to move laterally to realize the lateral movement of the first shaft, so that the blades can evenly dissipate heat to the power electronic transformer, preventing uneven temperature distribution on the power electronic transformer and causing mechanical failure and damage.

By setting 3 blades of plastic material, the influence of the use of metal blades on the voltage difference inside the power electronic transformer is avoided. At the same time, the use of 3 blades makes the air output more stable, and the triangular structure makes the blades save money when rotating. Electricity and energy.

Description of drawings

1 is a schematic structural diagram of a heat dissipation device for a power electronic transformer proposed by the utility model;

FIG. 2 is a schematic diagram of the connection structure of a gear and a rack of a heat dissipation device for a power electronic transformer proposed by the utility model.

In the figure: 1 placement box, 2 partition, 3 equipment cavity, 4 working cavity, 5 power electronic transformer, 6 first shaft, 7 fixed block, 8 blades, 9 first cone wheel, 10 fixed plate, 11 motor, 12 Cross bar, 13 groove, 14 rack, 15 gear, 16 second shaft, 17 vertical rod, 18 second bevel wheel, 19 third bevel wheel, 20 third shaft.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

1-2, a heat dissipation device for a power electronic transformer includes a placement box 1, and a vertically arranged partition 2 is fixedly connected in the placement box 1, and the partition 2 divides the placement box 1 into an equipment cavity 3 and a The working cavity 4 and the equipment cavity 3 are installed with a power electronic transformer 5 , and a first rotating shaft 6 is horizontally penetrated through the partition plate 2 . A fixed block 7 is connected, and a plurality of blades 8 for blowing are installed on the fixed block 7. The blades 8 are made of plastic material, and the number of the blades 8 is 3. The air outlet is more stable and saves electricity and energy from a mechanical point of view. One end of the rotating shaft 6 located in the working chamber 4 is sequentially fixed and sleeved with the first bevel wheel 9 and the fixing plate 10, the side wall of the fixing plate 10 is fixedly connected with the motor 11, and the end of the output shaft of the motor 11 is fixedly connected with the first rotating shaft 6. 11 is a four-wire five-phase motor that can control the steering and rotation speed, so that the blade 8 can move forward and backward while moving forward and backward to uniformly dissipate heat from the power electronic transformer. The working chamber 4 is provided with a transmission that cooperates with the first bevel wheel 9 mechanism, the side wall of the placing box 1 and the partition plate 2 are provided with ventilation openings to ensure the overall air flow of the device.

In the present invention, the transmission mechanism includes a cross bar 12 slidably connected to the side wall of the partition plate 2 and the inner side wall of the placing box 1 , the lower end surface of the cross bar 12 is fixedly connected with the fixing plate 10 , and the upper end surface of the cross bar 12 is fixedly connected with a The vertical rod 17 is provided with a guiding structure, the horizontal rod 12 is vertically penetrated with a second rotating shaft 16, the upper and lower ends of the second rotating shaft 16 are fixedly sleeved with a second bevel wheel 18, and the second rotating shaft 16 The bearing is rotatably connected with the cross bar 12, the second bevel wheel 18 at the lower end of the second rotating shaft 16 is engaged with the first bevel wheel 9, and the second bevel wheel 18 at the upper end of the second rotating shaft 16 is connected with the guide structure, and the guide structure includes a horizontal Passing through the third shaft 20 disposed on the vertical rod 17, the third shaft 20 is rotatably connected to the vertical rod 17 through a bearing, one end of the third shaft 20 is slidably connected to the side wall of the partition plate 2, and the other end is fixedly sleeved with a gear 15. The inner side wall of the placing box 1 is provided with a groove 13, and the groove 13 is provided with a rack 14 that meshes with the gear 15.

When the utility model is in use, when the power electronic transformer 5 needs to be dissipated, the motor 11 is started to rotate in the forward direction, which drives the first rotating shaft 6 to rotate forward, so that the blades 8 rotate to discharge the wind, and the power electronic transformer 5 is dissipated. At the same time of rotation, the first bevel wheel 9 is driven to rotate, so that the second rotating shaft 16 rotates, thereby making the third rotating shaft 20 rotate. At the same time of rotation, the front and rear lateral movement drives the vertical rod 17 and the horizontal rod 12 to laterally move, thereby causing the fixed plate 10 to laterally move to realize the lateral movement of the first rotating shaft 6, so that the blades 8 uniformly dissipate heat to the power electronic transformer 5 and prevent power The uneven temperature distribution on the electronic transformer 5 causes mechanical failure and damage. Before the gear 15 reaches the end of the rack 14, the steering of the motor 11 is changed by the inherent steering program, so that it reverses and continues to dissipate heat evenly to the power electronic transformer.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (6)

1. A heat dissipation device for a power electronic transformer comprises a placing box (1) and is characterized in that a vertically arranged partition plate (2) is fixedly connected in the placing box (1), the partition plate (2) divides the placing box (1) into an equipment cavity (3) and a working cavity (4), a power electronic transformer (5) is installed in the equipment cavity (3), a first rotating shaft (6) horizontally penetrates through the partition plate (2), the first rotating shaft (6) is in sliding connection with the partition plate (2), one end, located in the equipment cavity (3), of the first rotating shaft (6) is fixedly connected with a fixing block (7), a plurality of blades (8) used for blowing are installed on the fixing block (7), one end, located in the working cavity (4), of the first rotating shaft (6) is sequentially and fixedly sleeved with a first cone pulley (9) and a fixing plate (10), and the side wall of the fixing plate (10) is fixedly connected with a motor (11), the tail end of an output shaft of the motor (11) is fixedly connected with the first rotating shaft (6), and a transmission mechanism matched with the first cone pulley (9) is arranged in the working cavity (4).

2. A heat sink for a power electronic transformer according to claim 1, the transmission mechanism comprises a cross bar (12) which is connected with the side wall of the clapboard (2) in a sliding way and the inner side wall of the placing box (1), the lower end surface of the cross rod (12) is fixedly connected with the fixed plate (10), the upper end surface of the cross rod (12) is fixedly connected with a vertical rod (17), the vertical rod (17) is provided with a guide structure, the transverse rod (12) is vertically provided with a second rotating shaft (16) in a penetrating way, the upper end and the lower end of the second rotating shaft (16) are fixedly sleeved with a second cone pulley (18), the second rotating shaft (16) is rotationally connected with the cross rod (12) through a bearing, a second cone pulley (18) at the lower end of the second rotating shaft (16) is meshed with the first cone pulley (9), and a second cone pulley (18) at the upper end of the second rotating shaft (16) is connected with the guide structure.

3. The heat dissipation device for the power electronic transformer as recited in claim 2, wherein the guiding structure comprises a third rotating shaft (20) horizontally penetrating the vertical rod (17), the third rotating shaft (20) is rotatably connected with the vertical rod (17) through a bearing, one end of the third rotating shaft (20) is slidably connected to the side wall of the partition plate (2), the other end of the third rotating shaft is fixedly sleeved with a gear (15), the inner side wall of the placing box (1) is provided with a groove (13), and a rack (14) engaged with the gear (15) is arranged in the groove (13).

4. The heat dissipation device for the power electronic transformer as claimed in claim 1, wherein the side wall of the placing box (1) and the partition plate (2) are both provided with ventilation openings.

5. A heat sink for a power electronic transformer according to claim 1, characterized in that the motor (11) is a four-wire five-phase motor with controllable direction of rotation and speed of rotation.

6. A heat sink for a power electronic transformer according to claim 1, characterized in that said fins (8) are made of plastic and are 3 in number.

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