A dry type transformer
By introducing auxiliary rotors and intake passages into the dry transformer, airflow return is optimized, and the adjustable wall and noise reduction chamber design is used to solve the problems of cross-flow fan return loss and high noise, improving cooling effect and noise reduction.
Patent Information
- Application Number
- CN202210813241.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-07-11
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2042-07-11
AI Technical Summary
The cross-flow fans in existing dry transformers have problems such as large return airflow loss and high noise, which affects the cooling effect.
Auxiliary runners and auxiliary intake passage designs are used to promote the return of the return airflow, increase the intake volume, and optimize air flow diversion and noise control through an adjustable wall and noise reduction chamber design.
It improves the output air volume of the cross-flow fan and the cooling effect of the dry transformer, reducing air volume loss and noise.
Smart Images
Figure CN115101296B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of transformers and dry-type transformers, and in particular to a dry-type transformer. Background Art
[0002] The heat dissipation methods of dry-type transformers usually include natural heat dissipation and forced heat dissipation. Forced heat dissipation usually uses heat dissipation fans (cross flow fans, axial flow fans) for heat dissipation. Figure 1 As shown, the existing dry-type transformer includes a transformer body 1, a heat sink 2, a cross-flow fan 3, and a control device 4. The heat sink 2 is arranged around the transformer body 1, the cross-flow fan 3 is arranged on the heat sink 2, and the control device 4 is arranged on the side of the heat sink 2. The cross-flow fan 3 includes a first shell, a second shell, and a cross-flow impeller, and the cross-flow impeller is installed in the impeller cavity formed by the first shell and the second shell. However, the existing cross-flow fan has the problem of large air volume loss and high noise caused by backflow. Summary of the invention
[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a dry-type transformer, which can promote the reflux of the return airflow and increase the air intake through the design of the auxiliary rotor and the auxiliary air intake channel, thereby increasing the output air volume of the cross-flow fan and improving the cooling effect of the dry-type transformer. It can have a good guiding and noise reduction effect on the airflow through the design of the adjustable wall and the noise reduction cavity, thereby reducing the air volume loss of the cross-flow fan and reducing the noise.
[0004] In order to achieve the above object, the technical solution adopted by the present invention is:
[0005] A dry-type transformer, comprising a transformer body (1), a heat sink (2), a cross-flow fan (3), and a control device (4), wherein heat sinks are arranged around the transformer body, the cross-flow fan is arranged on the heat sink, and the control device is arranged on the side of the heat sink, the cross-flow fan (3) comprises a first shell (31), a second shell (32), and a cross-flow impeller (33), and the cross-flow impeller is installed in an impeller cavity formed by the first shell and the second shell, and is characterized in that: the second shell comprises a first inclined wall (321), a first arc-shaped portion (322), a second arc-shaped portion (323), and a first arc-shaped portion (324) connected in sequence Two inclined walls (324), the first inclined wall and the second inclined wall are inclined relative to the horizontal line, the angle between the first inclined wall and the second inclined wall is 0-30 degrees, the first arc-shaped portion protrudes toward the side away from the cross-flow impeller, and the second arc-shaped portion protrudes toward the side close to the cross-flow impeller. A reflow area is formed between the first arc-shaped portion and the outer peripheral surface of the cross-flow impeller. An auxiliary wheel (34) is installed in the reflow area, and the auxiliary wheel is connected to the auxiliary motor. An auxiliary air intake channel (325) is opened at the bottom of the first arc-shaped portion, and the auxiliary air intake channel connects the reflow area and the space between the first inclined wall and the second inclined wall.
[0006] Furthermore, an arc-shaped transition portion (326) is provided between the first arc-shaped portion (322) and the second arc-shaped portion (323), and the arc-shaped transition portion has the same center as the cross-flow impeller (33), thereby better promoting the backflow of the airflow.
[0007] Furthermore, the cross-flow impeller (33) rotates clockwise, and the auxiliary impeller (34) also rotates clockwise.
[0008] Furthermore, the second shell (32) comprises a horizontal wall (311), a vertical wall (312), an arc-shaped protrusion (314), and a first arc-shaped wall (313) which are connected in sequence; an air inlet channel is formed between the horizontal wall and the first inclined wall; an air outlet channel is formed between the first arc-shaped wall and the second inclined wall; an adjustable wall (35) is provided at the corner where the horizontal wall and the vertical wall are connected; a noise reduction chamber (36) is formed between the adjustable wall and the horizontal wall and the vertical wall; a plurality of connecting holes (352) are provided on the adjustable wall; one end of the connecting hole is connected to the outer peripheral area of the cross-flow impeller (33), and the other end is connected to the noise reduction chamber; the adjustable wall is an arc-shaped guide wall.
[0009] Furthermore, a pivot portion (351) is provided at one end of the adjustable wall (35), the pivot portion is connected to the inner side of the horizontal wall (311), and the adjustable wall can rotate to a certain angle under the drive of the pivot portion.
[0010] Furthermore, the arc-shaped protrusion (314) protrudes relative to the vertical wall (312) toward a side close to the cross-flow impeller (33), and the gap between the arc-shaped protrusion and the outer peripheral surface of the cross-flow impeller is the minimum gap between the outer peripheral surface of the cross-flow impeller and the first shell (31); when in the first position, the adjustable wall (35) abuts against the vertical wall, and when in the second position, there is a gap between the adjustable wall and the arc-shaped protrusion.
[0011] Furthermore, the pivoting portion (351) is connected to an electric drive device or a manual rotation positioning device.
[0012] The dry-type transformer of the present invention can promote the reflux of the reflux airflow and increase the air intake volume through the design of the auxiliary rotor and the auxiliary air intake channel, thereby increasing the output air volume of the cross-flow fan and improving the cooling effect of the dry-type transformer. The design of the adjustable wall and the noise reduction cavity can have a good airflow guidance and noise reduction effect, thereby reducing the air volume loss of the cross-flow fan and reducing the noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of a dry-type transformer in the prior art;
[0014] Figure 2 This is a schematic diagram of the structure of the cross flow fan of the present invention;
[0015] Figure 3 This is a schematic diagram of the structure of the cross flow fan of the present invention;
[0016] Figure 4 It is a schematic diagram of the structure of the cross flow fan of the present invention.
[0017] In the figure: transformer body 1, heat sink 2, cross flow fan 3, control device 4, first shell 31, second shell 32, cross flow impeller 33, auxiliary rotor 34, adjustable wall 35, noise reduction chamber 36, horizontal wall 311, vertical wall 312, first arcuate wall 313, arcuate protrusion 314, first inclined wall 321, first arcuate portion 322, second arcuate portion 323, second inclined wall 324, auxiliary air intake channel 325, arcuate transition portion 326, pivot portion 351, connecting hole 352, air flow direction "→". DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0020] like Figure 2-4As shown, a dry-type transformer includes a transformer body 1, a heat sink 2, a cross-flow fan 3, and a control device 4. The transformer body 1 is provided with heat sinks 2 around it, the heat sink 2 is provided with a cross-flow fan 3, and the side of the heat sink 2 is provided with a control device 4. The cross-flow fan 3 includes a first shell 31, a second shell 32, and a cross-flow impeller 33. The cross-flow impeller 33 is installed in an impeller cavity formed by the first shell 31 and the second shell 32. It is characterized in that: the second shell 32 includes a first inclined wall 321, a first arc portion 322, a second arc portion 323, and a second inclined wall 324 connected in sequence, and the first inclined wall 321 and the second inclined wall 324 are connected in sequence. The first inclined wall 321 and the second inclined wall 324 are inclined relative to the horizontal line, and the angle between them is 5-10° (preferably 7-8°). The first arc-shaped portion 322 protrudes toward the side away from the cross-flow impeller 33, and the second arc-shaped portion 323 protrudes toward the side close to the cross-flow impeller 33. A reflow area is formed between the first arc-shaped portion 322 and the outer peripheral surface of the cross-flow impeller 33. An auxiliary impeller 34 is installed in the reflow area, and the auxiliary impeller 34 is connected to the auxiliary motor. An auxiliary air intake channel 325 is opened at the bottom of the first arc-shaped portion 322, and the auxiliary air intake channel 325 connects the reflow area and the space between the first inclined wall 321 and the second inclined wall 324.
[0021] The auxiliary wheel 34 rotates under the drive of the auxiliary motor, and the backflow of the air outlet of the cross-flow impeller 33 flows back smoothly under the action of the auxiliary wheel 34, and a part of the air intake can be increased.
[0022] A dry-type transformer of the present invention can promote the reflux of (return) airflow and increase the air intake volume through the design of the auxiliary rotor 34 and the auxiliary air intake channel 325, thereby increasing the output air volume of the cross-flow fan and improving the cooling effect of the dry-type transformer.
[0023] Furthermore, an arc-shaped transition portion 326 is provided between the first arc-shaped portion 322 and the second arc-shaped portion 323 . The arc-shaped transition portion 326 has the same center as the cross-flow impeller 33 , which can better promote the backflow of the airflow.
[0024] Further, the cross-flow impeller 33 rotates clockwise, and the auxiliary rotor 34 also rotates clockwise. In some non-recommended embodiments, due to the difference in size and gap, the auxiliary rotor 34 can also be arranged to rotate counterclockwise.
[0025] Furthermore, the second shell 32 includes a horizontal wall 311, a vertical wall 312, an arc-shaped protrusion 314, and a first arc-shaped wall 313 which are connected in sequence. An air inlet channel is formed between the horizontal wall 311 and the first inclined wall 321, and an air outlet channel is formed between the first arc-shaped wall 313 and the second inclined wall 324. An adjustable wall 35 is provided at the corner where the horizontal wall 311 and the vertical wall 312 are connected. A noise reduction chamber 36 is formed between the adjustable wall 35 and the horizontal wall 311 and the vertical wall 312. A plurality of connecting holes 352 are provided on the adjustable wall 35. One end of the connecting hole 352 is connected to the peripheral area of the cross-flow impeller 33, and the other end is connected to the noise reduction chamber 36. The adjustable wall 35 is an arc-shaped guide wall.
[0026] A dry-type transformer of the present invention can have good airflow guidance and noise reduction effects through the design of the adjustable wall 35 and the noise reduction cavity 36, thereby reducing the air volume loss of the cross-flow fan and reducing noise.
[0027] Furthermore, a pivot portion 351 is provided at one end of the adjustable wall 35 , and the pivot portion 351 is connected to the inner side of the horizontal wall 311 . The adjustable wall 35 can rotate to a certain angle driven by the pivot portion 351 , so as to adjust the diversion and noise reduction effects.
[0028] Furthermore, the arc-shaped protrusion 314 protrudes toward the side close to the cross-flow impeller 33 relative to the vertical wall 312, and the gap between the arc-shaped protrusion 314 and the outer peripheral surface of the cross-flow impeller 33 is the minimum gap between the outer peripheral surface of the cross-flow impeller 33 and the first shell 31; in the first position, the adjustable wall 35 abuts against the vertical wall 312, and in the second position, there is a spacing between the adjustable wall 35 and the arc-shaped protrusion 314.
[0029] Furthermore, the pivoting portion 351 is connected to an electric driving device or a manual rotation positioning device.
[0030] The dry-type transformer of the present invention can promote the reflux of (return) airflow and increase the air intake volume through the design of the auxiliary rotor 34 and the auxiliary air intake channel 325, thereby increasing the output air volume of the cross-flow fan and improving the cooling effect of the dry-type transformer. The adjustable wall 35 and the noise reduction cavity 36 can have a good airflow guidance and noise reduction effect, thereby reducing the air volume loss of the cross-flow fan and reducing noise.
[0031] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A dry-type transformer, comprising a transformer body (1), a heat sink (2), a cross-flow fan (3), and a control device (4), wherein heat sinks are arranged around the transformer body, the cross-flow fan is arranged on the heat sink, and the control device is arranged on the side of the heat sink, the cross-flow fan (3) comprises a first shell (31), a second shell (32), and a cross-flow impeller (33), and the cross-flow impeller is installed in an impeller cavity formed by the first shell and the second shell, Features: The second shell (32) comprises a first inclined wall (321), a first arc-shaped portion (322), a second arc-shaped portion (323), and a second inclined wall (324) which are connected in sequence. The first inclined wall and the second inclined wall are arranged to be inclined relative to a horizontal line. The angle between the first inclined wall and the second inclined wall is 0-30°. The first arc-shaped portion protrudes toward a side away from the cross-flow impeller, and the second arc-shaped portion protrudes toward a side close to the cross-flow impeller. A reflow area is formed between the first arc-shaped portion and the outer peripheral surface of the cross-flow impeller. An auxiliary rotor (34) is installed in the reflow area. The auxiliary rotor is connected to an auxiliary motor. An auxiliary air intake channel (325) is provided at the bottom of the first arc-shaped portion. The auxiliary air intake channel connects the reflow area and the space between the first inclined wall and the second inclined wall. The first shell (31) comprises a horizontal wall (311), a vertical wall (312), an arc-shaped protrusion (314), and a first arc-shaped wall (313) which are connected in sequence; an air inlet passage is formed between the horizontal wall and the first inclined wall; an air outlet passage is formed between the first arc-shaped wall and the second inclined wall; an adjustable wall (35) is provided at the corner where the horizontal wall and the vertical wall are connected; a noise reduction chamber (36) is formed between the adjustable wall and the horizontal wall and the vertical wall; a plurality of connecting holes (352) are provided on the adjustable wall; one end of the connecting hole is connected to the outer peripheral area of the cross-flow impeller (33), and the other end is connected to the noise reduction chamber; the adjustable wall is an arc-shaped guide wall.
2. A dry-type transformer as claimed in claim 1, It is characterized in that An arc-shaped transition portion (326) is provided between the first arc-shaped portion (322) and the second arc-shaped portion (323); the arc-shaped transition portion has the same center as the cross-flow impeller (33), and can better promote the return of airflow.
3. A dry-type transformer as claimed in claim 2, It is characterized in that The cross-flow impeller (33) rotates clockwise, and the auxiliary impeller (34) also rotates clockwise.
4. A dry-type transformer as claimed in claim 1, It is characterized in that A pivoting portion (351) is provided at one end of the adjustable wall (35), and the pivoting portion is connected to the inner side of the horizontal wall (311). The adjustable wall can rotate to a certain angle under the drive of the pivoting portion.
5. A dry-type transformer as claimed in claim 4, It is characterized in that The arc-shaped protrusion (314) protrudes relative to the vertical wall (312) toward a side close to the cross-flow impeller (33), and the gap between the arc-shaped protrusion and the outer peripheral surface of the cross-flow impeller is the minimum gap between the outer peripheral surface of the cross-flow impeller and the first shell (31); in the first position, the adjustable wall (35) abuts against the vertical wall, and in the second position, there is a gap between the adjustable wall and the arc-shaped protrusion.
6. A dry-type transformer as claimed in claim 5, It is characterized in that The pivoting portion (351) is connected to an electric drive device or a manual rotation positioning device.