A cooling fan suitable for a workover rig drawworks motor

Abstract

The utility model discloses a kind of cooling fan suitable for well repair machine winch motor, comprising: shell, frequency converter and fan motor are sequentially arranged in its inside;Fan blade is fixedly sleeved on the output shaft of the fan motor;Inner air inlet and air outlet are opened on the shell;Air inlet box, air duct and volute are sequentially connected at the inner air inlet;Outer air inlet is opened at the bottom of the volute;Air outlet cover is arranged at the air outlet;Sound-absorbing layer is arranged on the inner wall of the air inlet box, the air duct, the volute and the air outlet cover.The utility model can make the whole cooling fan in low noise state, to reduce well repair machine winch motor noise, implement green environmental protection operation of well repair machine equipment.

Description

Technical Field

[0001] This utility model relates to the field of cooling fans. More specifically, this utility model relates to a cooling fan suitable for a well workover rig winch motor. Background Technology

[0002] The 160kW workover rig winch uses a variable frequency speed-regulating asynchronous motor, which generates significant noise during field operation. The cooling fan connected to the motor is a major noise source, especially at low motor speeds, where fan noise is the dominant noise level. Noise measurements show that the maximum noise from the cooling fan occurs at the air inlet. Therefore, it is necessary to provide a cooling fan suitable for the workover rig winch motor that can effectively reduce the noise transmitted from inside the cooling fan to the outside, thereby lowering the overall noise level of the workover rig winch during operation. Utility Model Content

[0003] One object of this invention is to solve at least the problems described above and to provide at least the advantages that will be explained later.

[0004] To achieve these objectives and other advantages according to this utility model, a cooling fan suitable for a well workover rig winch motor is provided, comprising: a housing, inside which a frequency converter and a fan motor are sequentially arranged; fan blades are fixedly sleeved on the output shaft of the fan motor; an inner air inlet and an air outlet are provided on the housing; an air inlet box, an air guide tube, and a volute are sequentially connected to the inner air inlet, and an outer air inlet is provided at the bottom of the volute; an air outlet hood is provided at the air outlet; and sound-absorbing layers are provided on the inner walls of the air inlet box, the air guide tube, the volute, and the air outlet hood.

[0005] Preferably, one side of the volute is a vertical surface for connecting to the air guide tube, and the other side is an arc surface with a radius that gradually increases from top to bottom.

[0006] Preferably, the shell is a cylindrical structure with an inner diameter of not less than 380 mm, and the inner wall of the shell is provided with a plurality of reinforcing ribs at intervals. The reinforcing ribs are arranged along the longitudinal direction of the shell, and a plurality of annular ribs are provided at intervals between two adjacent reinforcing ribs.

[0007] Preferably, the air inlet box is fixedly mounted on the base, and the base is provided with a pair of support ribs on the side facing the housing, and the housing is detachably mounted on the pair of support ribs.

[0008] Preferably, the fan includes a fan disc fixedly mounted on the output shaft of the fan motor and blades spaced apart circumferentially along the fan disc.

[0009] Preferably, the sound-absorbing layer is glass wool.

[0010] This utility model has at least the following beneficial effects: This utility model provides a cooling fan for the winch motor of a workover rig. It utilizes a frequency converter to control the motor speed based on the winch motor's temperature, ensuring stable operation while achieving energy saving and noise reduction. Furthermore, by installing sound-absorbing layers on the inner walls of the air inlet box, air guide tube, volute, and air outlet hood, noise transmission to the outside of the cooling fan is reduced, keeping the entire cooling fan in a low-noise state. This further reduces the noise of the workover rig winch motor, enabling green and environmentally friendly operation of the workover rig equipment.

[0011] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0012] Figure 1 This is a side view of the cooling fan for the well workover rig winch motor described in this utility model. Figure 2 This is a front view of the cooling fan for the well workover rig winch motor described in this utility model; Figure 3 This is a schematic diagram of the structure of the blade described in this utility model; Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0014] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figures 1 to 3As shown, this utility model provides a cooling fan suitable for a well workover rig winch motor, comprising: a housing 1, inside which a frequency converter and a fan motor are sequentially arranged; fan blades are fixedly sleeved on the output shaft of the fan motor; an inner air inlet and an air outlet are provided on the housing 1; an air inlet box 2, an air guide tube 3, and a volute 4 are sequentially connected to the inner air inlet, and an outer air inlet 5 is provided at the bottom of the volute 4; an air outlet cover 10 is provided at the air outlet; and sound-absorbing layers are provided on the inner walls of the air inlet box 2, the air guide tube 3, the volute 4, and the air outlet cover 10.

[0016] In this technical solution, the frequency converter is connected to the fan motor, and can control the speed of the fan motor according to the winding and bearing temperature values ​​of the well workover rig winch motor. When the winch motor temperature is low, the fan motor runs at low speed or stops; when the winch motor temperature is high, the fan motor runs at high speed to cool down, ensuring the stable operation of the winch motor, while also achieving energy saving and noise reduction. Furthermore, considering that the maximum noise of existing cooling fans occurs at the air inlet, this invention provides sound-absorbing layers on the inner walls of the air inlet box 2, the air guide duct 3, and the volute 4. These sound-absorbing layers dissipate the sound wave energy of the noise, minimizing the noise transmission to the outside of the cooling fan. Further, a sound-absorbing layer is also provided on the inner wall of the air outlet shroud 10 to reduce noise at the air outlet, thereby keeping the entire cooling fan in a low-noise state. Preferably, as... Figure 2 As shown, air vents are provided on both sides of the housing 1.

[0017] In another technical solution, one side of the volute 4 is a vertical surface for connection with the air guide duct 3, and the other side is an arc surface with a radius that gradually increases from top to bottom. (See reference...) Figure 1 The external air inlet 5 is located at the bottom of the volute 4, which changes the air intake method in the prior art from horizontal straight air intake to bottom-up air intake, and the inner diameter of the volute 4 increases from top to bottom to reduce the noise caused by air intake turbulence.

[0018] In another technical solution, the housing 1 is a cylindrical structure with an inner diameter of not less than 380 mm. Multiple reinforcing ribs are spaced apart on the inner wall of the housing 1, and these ribs are arranged longitudinally along the housing 1. Multiple annular ribs are spaced apart between adjacent reinforcing ribs. The reinforcing ribs and annular ribs increase the overall rigidity of the housing 1 and reduce noise generated by vibration. Preferably, the distance between two adjacent reinforcing ribs is not greater than 80 mm, and the thickness of the housing 1 is preferably 2.5 mm.

[0019] In another technical solution, the air inlet box 3 is fixedly mounted on the base 6, and the base 6 has a pair of support ribs 7 on the side facing the housing 1. The housing 1 is detachably mounted on the pair of support ribs 7. The support ribs 7 are used to support the housing 1, so that the installation method of the fan motor is changed from B3 to B35, making the fan motor more stable and further reducing the noise generated by vibration.

[0020] In another technical solution, the fan includes a fan disc 9 fixedly sleeved on the output shaft of the fan motor and blades 8 spaced circumferentially along the fan disc 9. Preferably, the blades 8 are welded to the fan disc 9, such as... Figure 3 As shown, the outer tangent angle α of the blade 8 is 21°~22°, and the inner tangent angle β is 60°~61°. A blade with a smaller curvature can reduce friction between the blade and the air, thereby reducing airflow noise.

[0021] In another technical solution, the sound-absorbing layer is glass wool. Glass wool dissipates sound wave energy through its porous fiber structure. Through the interaction between sound waves and the internal fibers and pores of the material, sound energy is converted into heat energy, thereby achieving noise reduction. The sound-absorbing layer can also be made of other sound-insulating materials such as rock wool or foam sound insulation felt.

[0022] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A cooling fan suitable for a well workover rig winch motor, characterized in that, include: The housing contains a frequency converter and a fan motor arranged sequentially inside; fan blades are fixedly fitted onto the output shaft of the fan motor; the housing has an inner air inlet and an air outlet; an air inlet box, an air guide tube, and a volute are connected sequentially to the inner air inlet, and an outer air inlet is opened at the bottom of the volute; an air outlet hood is provided at the air outlet; and sound-absorbing layers are provided on the inner walls of the air inlet box, the air guide tube, the volute, and the air outlet hood.

2. The cooling fan for a well workover rig winch motor as described in claim 1, characterized in that, One side of the volute is a vertical surface for connecting to the air guide tube, and the other side is an arc surface with a radius that gradually increases from top to bottom.

3. The cooling fan for a well workover rig winch motor as described in claim 1, characterized in that, The shell is a cylindrical structure with an inner diameter of not less than 380 mm. The inner wall of the shell is provided with a plurality of reinforcing ribs at intervals. The reinforcing ribs are arranged along the longitudinal direction of the shell, and a plurality of annular ribs are provided between two adjacent reinforcing ribs at intervals.

4. The cooling fan for a well workover rig winch motor as described in claim 1, characterized in that, The air inlet box is fixedly mounted on the base, and a pair of support ribs are provided on the side of the base facing the housing. The housing is detachably mounted on the pair of support ribs.

5. The cooling fan for a well workover rig winch motor as described in claim 1, characterized in that, The fan blades include a fan disc fixedly mounted on the output shaft of the fan motor and blades spaced apart along the circumference of the fan disc.

6. The cooling fan for a well workover rig winch motor as described in claim 1, characterized in that, The sound-absorbing layer is glass wool.

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