High-air-pressure lengthened cross-flow type cooling fan for dry-type transformer

Abstract

The utility model belongs to the technical field of cooling fans, and particularly relates to a high-wind-pressure lengthened cross-flow type cooling fan for a dry-type transformer, which comprises a shell, a motor, a double-wind-wheel structure and a bearing switching structure, the side wall of the shell is respectively provided with an air inlet and an air outlet, and the double-wind-wheel structure and the bearing switching structure are arranged in the shell. The double-wind-wheel structure comprises a first wind wheel and a second wind wheel, one end of the first wind wheel is rotationally supported at one end of the shell, the other end of the second wind wheel is fixedly connected to an output shaft of the motor, and the bearing switching structure comprises a connecting shaft and a fixing pin; the two ends of the connecting shaft penetrate through the other end of the first wind wheel and one end of the second wind wheel respectively and are fixed through fixing pins, the outer side of the middle of the connecting shaft is sleeved with a middle connecting plate, the middle connecting plate and the connecting shaft are rotationally connected through a bearing adapter, and the peripheral side of the middle connecting plate is fixedly connected with the shell.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling fans, in particular to a high-wind-pressure extended cross-flow cooling fan for dry-type transformers. Background Art

[0002] At present, the commonly used cross-flow cooling fans for dry-type transformers are mainly used for ventilation and heat dissipation of dry-type transformers. Their wind pressure and air volume are relatively small. When a dry-type transformer operates at full load or overload, a large amount of heat is generated in the high-voltage and low-voltage coils and the iron core, causing the temperature of the dry-type transformer itself to rise. If the heat is not dissipated in time and the temperature is not reduced to the specified range, the dry-type transformer will stop working or be burned out. Therefore, most dry-type transformers are equipped with cooling fans to blow air on the coils and the iron core for cooling.

[0003] The Chinese utility model patent discloses a high-wind-pressure cross-flow cooling fan with the application number CN201721472393.1. By adopting a motor with 2 poles of a new design, the fan speed is increased, and the wind pressure and air volume of the fan are increased. Through the special angle design of the wind deflector, the air outlet angle of the fan is close to horizontal, so that the air outlet can effectively enter the ventilation duct of the switch cabinet. At the same time, by improving the installation of the motor and the design of the wind wheel, the air outlet is uniform in the length direction of the air outlet of the fan, increasing the effective air volume and wind pressure of the fan, and making the heat dissipation effect of the equipment good. However, the cross-flow cooling fan adopts a single-wind-wheel structure, and its wind wheel length is relatively small. When used in a large length range, multiple units often need to be configured, which cannot meet the ventilation and heat dissipation requirements in a large length range.

[0004] Therefore, it is urgent to improve the structure of the existing cross-flow cooling fan and provide a high-wind-pressure extended cross-flow cooling fan for dry-type transformers with a reasonable design, a double-wind-wheel structure, and good ventilation and heat dissipation effects. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a high-wind-pressure extended cross-flow cooling fan for dry-type transformers with a reasonable design, a double-wind-wheel structure, and good ventilation and heat dissipation effects to solve the problems existing in the prior art.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-wind-pressure extended cross-flow cooling fan for a dry-type transformer, which comprises a housing and a motor. Air inlets and air outlets are respectively formed on the side walls of the housing. It further comprises a double-wind-wheel structure and a bearing transfer structure. The double-wind-wheel structure includes a first wind wheel and a second wind wheel. One end of the first wind wheel is rotatably supported at one end of the housing, and the other end of the second wind wheel is fixedly connected to the output shaft of the motor. The bearing transfer structure includes a connecting shaft and a fixing pin. The two ends of the connecting shaft respectively pass through the other end of the first wind wheel and one end of the second wind wheel and are fixed by the fixing pin. An intermediate connecting plate is sleeved on the outer side of the middle of the connecting shaft. A bearing transfer member is provided between the intermediate connecting plate and the connecting shaft for rotational connection. The periphery of the intermediate connecting plate is fixedly connected to the housing.

[0008] Preferably, the housing includes a first end plate and a second end plate. A volute plate is fixedly connected between the lower parts of the first end plate and the second end plate, and a wind guiding angle plate is fixedly connected between the upper parts of the first end plate and the second end plate. The wind guiding angle plate is arranged between the air outlet and the air inlet.

[0009] Preferably, two first protective nets are respectively provided corresponding to the first wind wheel and the second wind wheel at the air outlet.

[0010] Preferably, a plurality of clamping components for clamping the first protective net are provided on both the wind guiding angle plate and the volute plate.

[0011] Preferably, the clamping component includes a buckle and a T-shaped column. The end of the vertical rod of the T-shaped column far from the cross bar is fixedly installed on the housing. A waist-shaped hole is formed in the middle of the buckle and slidably sleeved on the vertical rod of the T-shaped column. The two ends of the buckle are respectively bent to form two clamping openings.

[0012] Preferably, there are two air inlets, and the two air inlets are respectively arranged on two adjacent side walls of the housing. The air outlet is arranged on the side wall of the housing opposite to one of the air inlets.

[0013] Preferably, a second protective net is provided at each air inlet.

[0014] Preferably, the number of blades of both the first wind wheel and the second wind wheel is 40.

[0015] Preferably, the motor is a single-phase capacitor-run motor, and the number of poles of the motor is 2.

[0016] Preferably, the motor is arranged outside the end of the housing.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the solution of the present utility model, through the provided double wind wheel structure and bearing transfer structure, not only can the first wind wheel and the second wind wheel be connected in series as a whole, extending the overall wind wheel length range of the cooling fan to meet the ventilation and heat dissipation requirements within a large length range, but also only one motor is needed to drive the whole machine, reducing the equipment cost. At the same time, through the provided bearing transfer structure, it is also convenient for the independent disassembly and assembly of the first wind wheel and the second wind wheel, facilitating local maintenance and replacement. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The following is the description of the drawings:

[0020] Figure 1 It is a perspective three-dimensional structure schematic diagram of the present utility model;

[0021] Figure 2 It is another perspective three-dimensional structure schematic diagram of the present utility model;

[0022] Figure 3 It is another perspective three-dimensional structure schematic diagram of the present utility model after removing the first protective net;

[0023] Figure 4 It is a front view structure schematic diagram of the present utility model after removing the first protective net;

[0024] Figure 5 It is a cross-sectional structure schematic diagram of the present utility model;

[0025] Figure 6 It is a three-dimensional structure schematic diagram of the double wind wheel structure of the present utility model;

[0026] Figure 7 It is an exploded schematic diagram of the bearing transfer structure of the present utility model;

[0027] Figure 8 It is a three-dimensional structure schematic diagram of the clamping component of the present utility model;

[0028] In the figure:

[0029] 1. Housing; 11. First end plate; 12. Second end plate; 13. Vortex plate; 14. Air guide angle plate; 2. Motor; 3. Double wind wheel structure; 31. First wind wheel; 32. Second wind wheel; 4. Bearing transfer structure; 41. Connecting shaft; 42. Intermediate connecting plate; 43. Bearing transfer part; 44. Fixed pin; 51. First protective net; 52. Second protective net; 6. Clamping component; 61. Buckle; 62. T-shaped column; 63. Waist-shaped hole. Detailed Embodiments

[0030] The embodiments described below are only a part of the embodiments of the present utility model and do not represent all embodiments consistent with the present utility model. Now, in conjunction with the accompanying drawings, the exemplary embodiments are described as follows:

[0031] Referring to Figure 1-8 As shown in one of them, the high-wind-pressure extended cross-flow cooling fan for dry-type transformers of the present utility model includes a housing 1 and a motor 2. An air inlet and an air outlet are respectively provided on the side wall of the housing 1; in order to increase the working length of the wind wheel and meet the ventilation and heat dissipation requirements in a large length range, the present utility model further includes a double-wind-wheel structure 3 and a bearing transfer structure 4. The double-wind-wheel structure 3 includes a first wind wheel 31 and a second wind wheel 32. One end of the first wind wheel 31 is rotatably supported at one end of the housing 1, and the other end of the second wind wheel 32 is fixedly connected to the output shaft of the motor 2. The bearing transfer structure 4 includes a connecting shaft 41 and a fixing pin 44. Both ends of the connecting shaft 41 are respectively passed through the other end of the first wind wheel 31 and one end of the second wind wheel 32 and fixed by the fixing pin 44. An intermediate connecting plate 42 is sleeved outside the middle of the connecting shaft 41. A bearing transfer member 43 is rotatably connected between the intermediate connecting plate 42 and the connecting shaft 41, and the periphery of the intermediate connecting plate 42 is fixedly connected to the housing 1.

[0032] In this embodiment, the bearing transfer structure 4 is used to connect the first wind wheel 31 and the second wind wheel 32 of the double-wind-wheel structure 3 in series, so that one wind wheel of the traditional cross-flow cooling fan is improved to two wind wheels, making the air outlet of the fan more uniform in the length direction, extending the overall wind wheel length range of the cooling fan, improving the wind pressure and air volume of the fan, and thus being able to meet the ventilation and heat dissipation requirements in a large length range. Moreover, the double-wind-wheel structure 3 only needs to use one motor 2 to drive the whole machine, which can reduce the equipment cost; through the arranged bearing transfer structure 4, it is not only convenient for the independent disassembly and assembly of the first wind wheel 31 and the second wind wheel 32, facilitating local maintenance and replacement, but also the intermediate connecting plate 42 can play a supporting role, enhancing the hardness of the wind wheel.

[0033] On the basis of the above structure, preferably, the number of blades of both the first wind wheel 31 and the second wind wheel 32 is 40; the motor 2 is a single-phase capacitor-run motor, and the number of poles of the motor 2 is 2; the motor 2 is arranged outside the end of the housing 1.

[0034] In this embodiment, by using a 2-pole motor to replace the traditional 4-pole motor, the wind wheel speed can be increased.

[0035] Referring to Figure 1 Or Figure 5 As shown, on the basis of the above structure, preferably, there are two air inlets, and the two air inlets are respectively arranged on two adjacent side walls of the housing 1, and the air outlet is arranged on the side wall of the housing 1 opposite to one of the air inlets.

[0036] In this embodiment, by providing two air inlets and one air outlet, as shown in Figure 5 where A and B are the directions of the air inlets and C is the direction of the air outlet, the air pressure and air volume of the fan can be increased.

[0037] Referring to Figure 3 As a preferred embodiment, on the basis of the above structure, preferably, the housing 1 includes a first end plate 11, a second end plate 12 and a volute plate 13 in an arc shape. A volute plate 13 is fixedly connected between the lower parts of the first end plate 11 and the second end plate 12, and a wind guiding angle plate 14 is fixedly connected between the upper parts of the first end plate 11 and the second end plate 12. The wind guiding angle plate 14 is arranged between the air outlet and the air inlets.

[0038] As a preferred embodiment, on the basis of the above structure, preferably, both the first end plate 11 and the second end plate 12 are made of stainless steel material, and the motor 2 is installed on the outside of the second end plate 12 through nuts.

[0039] Referring to Figure 1 As a preferred embodiment, on the basis of the above structure, preferably, second protection nets 52 are provided at both air inlets of the housing 1.

[0040] Referring to Figure 2 As a preferred embodiment, on the basis of the above structure, preferably, two first protection nets 51 are provided at the air outlet of the housing 1 corresponding to the first wind wheel 31 and the second wind wheel 32 respectively.

[0041] Referring to Figure 8 As a preferred embodiment, on the basis of the above structure, in order to facilitate the disassembly and assembly of the first protection net 51 for cleaning the first protection net 51 or maintaining the wind wheel, further, a plurality of clamping components 6 for clamping the first protection net 51 are provided on both the wind guiding angle plate 14 and the volute plate 13.

[0042] On the basis of the above structure, preferably, the clamping component 6 includes a buckle 61 and a T-shaped column 62. The end of the vertical rod of the T-shaped column 62 far from the cross bar is fixedly installed on the housing 1. A waist-shaped hole 63 is formed in the middle of the buckle 61 and slidably sleeved on the vertical rod of the T-shaped column 62. Both ends of the buckle 61 are bent to form two clamping ports.

[0043] In this embodiment, through the provided waist-shaped hole 63, the buckle 61 can slide left and right relative to the T-shaped column 62, thus facilitating the disassembly, assembly and fixation of the first protection net 51.

[0044] The above are only the preferred specific embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model; any equivalent changes, modifications, substitutions and variations made by those skilled in the art in this technical field based on the concept of the present utility model on the basis of the prior art through logical analysis, reasoning or limited experiments shall fall within the protection scope determined by the claims.

Claims

1. A high-pressure elongated cross-flow cooling fan for a dry-type transformer, comprising a housing (1) and a motor (2), wherein an air inlet and an air outlet are respectively provided on the side wall of the housing (1), and characterized in that: It also includes a dual wind wheel structure (3) and a bearing adapter structure (4), wherein the dual wind wheel structure (3) includes a first wind wheel (31) and a second wind wheel (32), one end of the first wind wheel (31) is rotatably supported on one end of the housing (1), and the other end of the second wind wheel (32) is fixedly connected to the output shaft of the motor (2), and the bearing adapter structure (4) includes a connecting shaft (41) and a fixing pin (44), the two ends of the connecting shaft (41) are respectively passed through the other end of the first wind wheel (31) and one end of the second wind wheel (32) and are fixed by the fixing pin (44), an intermediate connecting plate (42) is sleeved on the outer side of the middle part of the connecting shaft (41), a bearing adapter (43) is provided between the intermediate connecting plate (42) and the connecting shaft (41) for rotatable connection, and the peripheral side of the intermediate connecting plate (42) is fixedly connected to the housing (1).

2. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 1 is characterized in that: The housing (1) comprises a first end plate (11) and a second end plate (12); a vortex plate (13) is fixedly connected between the lower parts of the first end plate (11) and the second end plate (12); an air guide angle plate (14) is fixedly connected between the upper parts of the first end plate (11) and the second end plate (12); and the air guide angle plate (14) is arranged between the air outlet and the air inlet.

3. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 2 is characterized in that: Two first protective nets (51) are provided at the air outlet, respectively corresponding to the first wind wheel (31) and the second wind wheel (32).

4. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 3 is characterized in that: The wind guide angle plate (14) and the vortex plate (13) are both provided with a plurality of clamping assemblies (6) for clamping the first protective net (51).

5. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 4 is characterized in that: The snap-fit ​​assembly (6) comprises a snap (61) and a T-shaped column (62); the end of the vertical rod of the T-shaped column (62) away from the horizontal rod is fixedly mounted on the housing (1); a waist-shaped hole (63) is provided in the middle of the snap (61) and is slidably sleeved on the vertical rod of the T-shaped column (62); and the two ends of the snap (61) are respectively bent to form two snap interfaces.

6. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 1 is characterized in that: There are two air inlets, which are respectively arranged on two adjacent side walls of the outer shell (1), and the air outlet is arranged on a side wall of the outer shell (1) opposite to one of the air inlets.

7. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 6 is characterized in that: A second protective net (52) is provided at each air inlet.

8. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 1 is characterized in that: The number of blades of the first wind wheel (31) and the second wind wheel (32) are both 40.

9. The high-pressure elongated cross-flow cooling fan for dry-type transformers according to claim 1 is characterized in that: The motor (2) is a single-phase capacitor-operated motor, and the number of poles of the motor (2) is 2; the motor (2) is arranged outside the end of the housing (1).

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