Volute type fan

Abstract

The utility model relates to the technical field of transformation of a conventional fan of a generator in a cooling system shared by a generator and a rectifier cabinet, in particular to a volute type fan, which comprises an outer shell, a volute, an end flange cover, a wind wheel rotating shaft, a wind wheel and a fixing column. And a fan impeller is not matched with a volute. According to the technical scheme, the problems that wind resistance is increased, air volume is reduced, a power assembly in the rectifier cabinet is sensitive to temperature, and the power assembly in the rectifier cabinet cannot work at full power when the temperature in the rectifier cabinet is too high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformation of a conventional fan of a generator in a heat dissipation system shared by a generator and a rectifier cabinet, in particular to a volute type fan. Background Art

[0002] The conventional cooling fan of the generator is an important component of the generator cooling system. Its main function is to take away the heat generated by the generator and dissipate it into the surrounding environment through forced convection to ensure the normal operation of the generator and extend its service life.

[0003] Conventional cooling fans usually consist of motors, blades, and shields. The motor is the power source of the fan, which drives the fan to rotate through the power supply; the blades are responsible for sucking in and accelerating the air to form forced convection; the shield plays a role in protection and guidance, preventing debris and people from contacting the fan blades.

[0004] During the operation of the generator, a large amount of heat is generated inside the generator because the current generates heat when it passes through the conductor. If this heat cannot be dissipated in time, the temperature of the generator will rise, which will affect its performance and life. Therefore, the role of a conventional cooling fan is to take away the heat generated inside the generator through forced convection and dissipate it to the surrounding environment to ensure the normal operation of the generator.

[0005] Conventional cooling fans of generators have large air volume and low air pressure, which are sufficient for cooling the generator itself. However, if the rectifier cabinet and the generator share a cooling system, wind resistance increases, air volume decreases, and the power components in the rectifier cabinet are sensitive to temperature and may not be able to operate at full power. To solve this problem, a volute fan has been developed, and the generator cooling fan is changed from axial flow to centrifugal type to meet the requirement that the generator and the rectifier cabinet share a cooling system. Utility Model Content

[0006] The utility model aims to provide a volute type fan to solve the problem that a rectifier cabinet and a generator share a heat dissipation system, the wind resistance increases, the air volume decreases, and the power components in the rectifier cabinet are sensitive to temperature and may not be able to work at full power. In order to solve this problem, a volute type fan is developed.

[0007] The utility model provides a volute-type fan, comprising an outer shell, a volute, an end flange cover, a wind wheel shaft, a wind wheel and a fixing column;

[0008] The wind wheel is mounted on the wind wheel shaft, the wind wheel shaft is connected to the driving motor, the wind wheel is provided with blades, and the wind wheel shaft is used to drive the blades to rotate;

[0009] The fixing column is installed on the inner side wall of the shell, and the fixing column is connected to the volute to provide support force for the volute;

[0010] A volute profile and the end flange cover are arranged between the outer shell and the wind wheel to form the volute.

[0011] Furthermore, the wind wheel is configured to consist of 11 blades.

[0012] Furthermore, the blades on the wind wheel are located at the center of the volute.

[0013] Furthermore, one side of the volute is circular, the other side of the volute is semicircular, the middle of the volute is arranged as a through hole, and the through hole arranged in the middle of the volute matches the end flange cover.

[0014] The utility model has the following beneficial effects: The utility model provides a volute-type fan, including an outer shell, a volute, an end flange cover, a wind rotor shaft, a wind rotor and a fixing column, which is similar to a centrifugal fan. The air inlet at the shaft of a traditional generator fan is small, and there is no volute matching at the impeller of a traditional generator fan. The technical solution of the present application solves the problem that the rectifier cabinet and the generator share a set of heat dissipation system, which increases the wind resistance and reduces the air volume. The power components in the rectifier cabinet are sensitive to temperature. When the temperature in the rectifier cabinet is too high, the power components in the rectifier cabinet cannot work at full power, and the effect of increasing the wind pressure in the rectifier cabinet is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The utility model is provided with a schematic diagram of the top view structure.

[0017] Figure 2 This is a schematic diagram of the practical scenario structure provided by the utility model.

[0018] Illustrations: 1. Casing, 2. Volute, 3. End flange cover, 4. Wind rotor shaft, 5. Wind rotor, 6. Fixing column, 7. Air outlet, 8. Rectifier cabinet, 9. Wind direction, 10. Generator, 11. Cooling fan. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, the embodiment of the utility model provides a volute type fan, comprising a housing 1, a volute 2, an end flange cover 3, a wind wheel shaft 4, a wind wheel 5 and a fixing column 6;

[0020] The wind wheel 5 is mounted on the wind wheel shaft 4, the wind wheel shaft 4 is connected to the driving motor, the wind wheel 5 is provided with blades, and the wind wheel shaft 4 is used to drive the blades to rotate;

[0021] The inner wall of the housing 1 is provided with the fixing column 6, the fixing column 6 is connected to the volute 2, and the fixing column 6 provides support force for the volute 2;

[0022] A volute profile and the end flange cover 3 are provided between the housing 1 and the wind wheel 5 to form the volute 2. In order to increase the wind pressure of the fan, a volute profile and an end flange cover are designed between the wind wheel and the motor cover to form a volute. Due to limited space, the wind wheel is designed to maximize the volute, and the volute is fixed by radial columns planted on the inner wall of the motor. The opening of the volute takes the minimum value according to the Fred theory, sacrificing the efficiency of the fan in exchange for the effect of increasing the wind pressure.

[0023] Specifically, the wind wheel 5 is configured to be composed of 11 blades. The wind wheel 5 is composed of 11 blades, each blade is designed at a fixed angle and distance between each other, and the blades are driven to rotate during the rotation of the cooling fan. The technical solution of the present application designs the wind wheel 5 to be composed of 11 blades, and the angles and distances between the blades are equal to each other. The cooling fan drives the 11 blades to rotate, thereby increasing the wind flow in the rectifier cabinet. The space in the rectifier cabinet is limited, and the size of the air inlet is limited. Under the premise of not changing the overall structure of the rectifier cabinet, the technical solution of the present application is installed on the cooling fan, thereby increasing the wind flow in the rectifier cabinet.

[0024] Specifically, the blades on the wind wheel 5 are located at the center of the volute 2. The fan volute design adopted in the technical solution of the present application is an important component of the heat dissipation fan to increase the air volume inside the rectifier cabinet. The influence of the volute 2 on the airflow is mainly reflected in the following aspects:

[0025] Volute 2 guides and accelerates the wind flow: The volute is designed to guide the airflow sucked in by the fan blades to the fan outlet, and accelerates the incoming airflow through its specific internal structure, thereby increasing the wind speed. This acceleration effect is achieved through the geometric design of the internal shape of the volute. Usually, the cross-section of the volute is a gradual curve, gradually expanding from the blade inlet to the outlet, so that the airflow can be accelerated in the volute.

[0026] Reduce wind pressure loss and improve efficiency: The design of the volute 2 in the technical solution of the present application can reduce the wind pressure loss of the fan, thereby improving the efficiency of the fan. The internal geometry and surface smoothness of the volute have an important influence on airflow movement and energy conversion. In order to reduce friction resistance and energy loss of airflow, the internal surface of the volute usually adopts a smooth surface treatment technology to reduce friction resistance, so that the airflow can move more smoothly inside the volute.

[0027] The volute 2 of the technical solution of the present application adopts a multi-blade design mode. During the design and development process, it was found that thickening the volute 2 would affect the air volume and air pressure of the fan.

[0028] Specifically, one side of the volute 2 is circular, the other side of the volute 2 is semicircular, the middle of the volute 2 is provided with a through hole, and the through hole provided in the middle of the volute 2 matches the end flange cover 3. Considering the stability and safety of the fan, the structure of the volute 2 of the technical solution of the present application is designed as follows: one side of the volute 2 is circular, the other side of the volute 2 is semicircular, the middle of the volute 2 is provided with a through hole, and the through hole provided in the middle of the volute 2 matches the end flange cover 3. The design of the technical solution of the present application can ensure the stability and safety of the fan when it is running at high speed.

[0029] The utility model uses a volute fan as follows: the conventional cooling fan of the generator has a large air volume and a small air pressure, which is sufficient for cooling the generator itself. However, if the rectifier cabinet and the generator share a cooling system, the wind resistance increases, the air volume decreases, and the power components in the rectifier cabinet are sensitive to temperature and may not work at full power.

[0030] The gap between the generator stator and rotor, and the ventilation holes distributed on the circumference of the stator and rotor are the air inlets of the motor. The motor end shell has an air outlet along the cylindrical surface, and the fan blades are designed as backward-inclined 11-blade wind wheels.

[0031] Compared with the original fan of the generator, the air inlet at the shaft of the original fan is small, and there is no volute at the impeller of the original fan. Figure 2 The scenario diagram of the actual use of the technical solution of the present application, in order to increase the wind pressure of the fan, the technical solution of the present application designs a volute profile and an end flange cover between the wind wheel and the motor cover to form a volute. Due to limited space, the wind wheel is designed to maximize the matching of the volute, and the volute is fixed by radial columns planted on the inner wall of the motor. The volute opening takes the minimum value according to Fred's theory, sacrificing the efficiency of the fan in exchange for the effect of increasing wind pressure. The technical solution of the present application solves the problem that the rectifier cabinet and the generator share a set of heat dissipation system, which increases wind resistance and reduces air volume. The power components in the rectifier cabinet are sensitive to temperature. When the temperature in the rectifier cabinet is too high, the power components in the rectifier cabinet cannot work at full power. The technical solution of the present application includes an outer shell, a volute, an end flange cover, a wind wheel shaft, a wind wheel and a fixed column. In order to increase the wind pressure of the fan, a volute profile and an end flange cover are designed between the wind wheel and the motor cover to form a volute. Due to limited internal space in the rectifier cabinet, the wind wheel is designed to maximize the matching of the volute, and the volute is fixed by radial columns on the inner wall of the motor. The volute opening takes the minimum value according to Fred's theory. During the rotation of the fan, the weight increases after the volute is installed, thus sacrificing the efficiency of the fan during rotation in exchange for the effect of increasing the wind pressure in the storage box.

[0032] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A volute type fan, characterized in that: It comprises a housing (1), a volute (2), an end flange cover (3), a wind wheel shaft (4), a wind wheel (5) and a fixing column (6); The wind wheel (5) is mounted on the wind wheel shaft (4), the wind wheel shaft (4) is connected to a driving motor, the wind wheel (5) is provided with blades, and the wind wheel shaft (4) is used to drive the blades to rotate; The fixing column (6) is installed on the inner side wall of the outer shell (1), the fixing column (6) is connected to the volute (2), and the fixing column (6) provides support force for the volute (2); A volute profile and the end flange cover (3) are provided between the outer casing (1) and the wind wheel (5) to form the volute (2).

2. A volute fan according to claim 1, characterized in that: The wind wheel (5) is configured to consist of 11 blades.

3. A volute type fan according to claim 2, characterized in that: The blades on the wind wheel (5) are located at the center of the volute (2).

4. A volute fan according to claim 1, characterized in that: One side of the volute (2) is circular, and the other side of the volute (2) is semicircular. The middle of the volute (2) is provided with a through hole, and the through hole provided in the middle of the volute (2) matches the end flange cover (3).

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