Cooling tower fan air inlet flow guide noise reduction device

Abstract

The application discloses a cooling tower fan air inlet guide noise reduction device, and relates to the technical field of cooling tower air inlet structures.The device comprises a cover body mechanism, a pipe connecting assembly is fixedly connected to the right end face of the cover body mechanism, and a connecting ring sleeve of an annular structure is fixedly connected to the inner wall of the pipe connecting assembly.The linkage structure design of the device improves operation adaptability and stability.A servo motor synchronously drives a wind plate adjustment, a stop block displacement and a spiral guide mechanism extension and retraction through a transmission shaft.The components are precisely matched through belt wheel transmission, gear meshing and other modes, ensuring that the air volume adjustment and the noise reduction measures are synchronously responded.Meanwhile, the cooperation of the guide ring assembly and the guide groove ensures the stability of the pipe sleeve mechanism displacement.The sealing ring avoids wind flow leakage interference and noise reduction effect.The overall structure maintains an efficient and low-noise operation state while adapting to different working conditions, overcoming the defects of poor adaptability of traditional structures.

Description

Technical Field

[0001] This invention relates to the field of cooling tower air inlet structure technology, specifically to a cooling tower fan air inlet guiding and noise reduction device. Background Technology

[0002] A cooling tower is a device that uses water as a circulating coolant to absorb heat from a system and release it into the atmosphere to lower the water temperature. Its cooling effect is achieved by the heat exchange between water and air flow to generate steam. The steam evaporates and carries away the heat, thus dissipating the waste heat generated in industrial processes or refrigeration and air conditioning to ensure the normal operation of the system. The device is generally barrel-shaped, hence the name cooling tower.

[0003] In the prior art, such as Chinese Patent Publication No. CN111207604A, a high-efficiency and environmentally friendly mechanical ventilation cooling tower is disclosed, including a tower body and a noise reduction structure. The noise reduction structure includes an exhaust silencer installed at the top of the tower body and an intake silencer installed at the bottom of the tower body; it also includes a sound-insulating guide tube installed below the exhaust silencer, a noise-reducing demister installed below the sound-insulating guide tube, a water collector installed below the noise-reducing demister, a water distribution packing area installed below the water collector, and a water droplet silencing device installed below the water distribution packing area. This invention can reduce the generation of plume and eliminate low-frequency noise generated by the fan blades.

[0004] In existing technologies, cooling towers often use silencers directly to reduce noise during air intake. However, the silencers lack an effective mechanism for adjusting the air intake volume, making it difficult for traditional fixed-structure silencers to precisely control noise reduction when airflow changes. Consequently, storm noise is still unavoidable when the airflow is too large, which presents limitations.

[0005] Therefore, we propose a cooling tower fan inlet airflow guiding and noise reduction device to address the issue mentioned in the background technology. Existing cooling tower inlet structures often rely on directly assembling silencers for noise reduction. However, the silencer structure lacks an effective linkage airflow adjustment mechanism, making it impossible for traditional fixed-structure silencers to achieve precise noise control when airflow changes. Consequently, when the airflow is too large, storm noise is still unavoidable, presenting limitations. Summary of the Invention

[0006] The purpose of this invention is to provide a cooling tower fan inlet airflow guiding and noise reduction device to solve the problem that, in the above-mentioned background art, the cooling tower airflow structure is mostly equipped with a silencer to achieve noise reduction. However, since the silencer structure lacks an effective linkage airflow adjustment structure, the traditional fixed structure silencer cannot achieve precise control of noise reduction when the airflow changes. When the airflow is too large, storm noise is still unavoidable, which has limitations.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cooling tower fan inlet air guiding and noise reduction device, comprising: a cover mechanism, wherein a pipe assembly is fixedly connected to the right end face of the cover mechanism, and a connecting ring of an annular structure is fixedly connected to the inner wall of the pipe assembly;

[0008] A guide ring assembly is fixedly connected to the side of the connecting pipe assembly away from the cover mechanism. The diameter of the guide ring assembly is larger than that of the connecting pipe assembly, and an annular groove is formed on the outer circumferential surface of the guide ring assembly. A sealing ring is embedded inside the annular groove. A pipe sleeve mechanism is sleeved on the outside of the connecting pipe assembly. A spiral flow guiding mechanism is fixedly connected to the inner side of the pipe sleeve mechanism. The left end face of the spiral flow guiding mechanism is fixedly connected to the right end face of the connecting ring sleeve. The spiral flow guiding mechanism is a pressure-contracting structure. A flow guiding groove is formed on the inner wall of the spiral flow guiding mechanism. The flow guiding groove and the spiral flow guiding mechanism together form a flow guiding and conveying structure for airflow. A baffle assembly is fixedly connected to the right side of the outer circumferential surface of the pipe sleeve mechanism. The baffle assembly is an annular structure. A noise reduction shield is fixedly connected to the left end face of the baffle assembly. The noise reduction shield is a flexible telescopic structure. The side of the noise reduction shield away from the baffle assembly is fixedly connected to the right end of the cover mechanism.

[0009] Preferably, the cover mechanism has an opening on the left side for connecting to the air inlet of the cooling tower, and the cover mechanism has an inclined surface on the outer side, with a mounting plate fixedly connected to the outer side of the inclined surface. There are four mounting plates in total.

[0010] Preferably, the four mounting plates are fixedly connected to the four corners of the outer side of the cover mechanism. The interior of each of the four mounting plates is provided with mounting holes. The outer side of the baffle assembly is fixedly connected to a flange A. The interior of flange A is provided with connecting holes in a ring array. The inner wall of the sleeve mechanism is provided with an annular groove, which is a guide groove. The guide groove is used to guide the guide ring assembly. The outer circumferential surface of the sealing ring is in contact with the inner wall of the guide groove.

[0011] Preferably, a support mechanism is fixedly connected to the top surface of the cover mechanism. The main body of the support mechanism is an L-shaped structure, and a servo motor is fixedly connected to the top surface of the support mechanism. An output shaft is provided at the bottom end of the servo motor. A transmission shaft is installed on the output shaft through a coupling. The bottom end of the transmission shaft is connected to the cover mechanism through a bearing seat. A wind vane assembly A and a wind vane assembly B are rotatably connected inside the left opening of the cover mechanism.

[0012] Preferably, the top ends of the drive shaft and the air plate assembly A are coaxially mounted with pulleys, and direct belts are also mounted on the outer sides of the two pulleys. The pulleys and direct belts together form a power transmission structure, and a drive gear is rotatably connected to the top end of the cover mechanism.

[0013] Preferably, an indirect pulley is coaxially mounted on the outer circumferential surface of the transmission shaft and the top of the drive gear. The indirect pulley is located directly above the direct pulley, and an indirect belt is also mounted on the outer side of the two indirect pulleys. A driven gear is coaxially mounted on the top of the fan plate assembly B. The drive gear meshes with the driven gear for transmission. The fan plate assembly A and the fan plate assembly B have an opposing opening structure.

[0014] Preferably, a linkage mechanism is installed in the middle section of the outer peripheral surface of the transmission shaft. A connecting shaft is installed on the side of the linkage mechanism away from the transmission shaft, and a connecting plate is installed through the connecting shaft. The side of the connecting plate away from the linkage mechanism is also hinged to the guide rod assembly through the connecting shaft.

[0015] Preferably, the main body of the guide rod assembly is a cylindrical structure, and a stop block assembly is fixedly connected to the right side of the guide rod assembly. The main body of the stop block assembly is a frustoconical structure that is thinner on the left and thicker on the right. The maximum diameter of the stop block assembly is consistent with the opening diameter of the right end face of the sleeve mechanism. There is a gap between the stop block assembly and the sleeve mechanism. Splicing support plates are fixedly connected in a ring array on the right end face of the stop block assembly.

[0016] Preferably, the side of the splicing support plate away from the stop block assembly is connected to the pipe sleeve mechanism, the gap between the splicing support plates is used for air passage, and flange B is installed on the right side of flange A. The diameter of flange B is the same as that of flange A, and the interior of flange B also has through holes arranged in a ring array. Flange A and flange B are connected by fixing bolts.

[0017] Preferably, a sleeve assembly is fixedly connected to the right side of the flange B. The sleeve assembly has an annular structure and a bidirectional through structure on both the left and right sides. A noise-reducing sponge is adhered to the inner wall of the sleeve assembly, and a porous noise-reducing plate is fixedly connected to the inner wall of the noise-reducing sponge. The porous noise-reducing plate has a tubular structure, and the interior of the porous noise-reducing plate has through holes arranged in an annular array.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. When this invention is used, it achieves the coordinated operation of dynamic adjustment and noise reduction through structural linkage. When the air volume fluctuates, the opposing opening structure of the air plate assembly A and the air plate assembly B can accurately adjust the size of the air intake channel. Combined with the gap change of the baffle assembly and the sleeve mechanism, the airflow intensity is controlled from the source, avoiding storm noise caused by sudden increase in air volume. This solves the limitation of traditional fixed silencers failing to reduce noise when the air volume changes.

[0020] 2. When this invention is used, by integrating spiral flow guidance with multi-stage noise reduction, the flow channel of the spiral flow guidance mechanism guides the airflow along the spiral path, reducing noise generated by turbulence; the noise-reducing sponge and the porous noise-reducing plate in the sleeve assembly form a progressive noise reduction, first weakening the impact through the flow diversion through the through holes, and then absorbing high-frequency noise through the sponge; the flexible and telescopic noise-reducing shield covers the connection parts, blocking noise leakage from the structural gaps. The three work together to build a full-path noise reduction system, which has a more comprehensive noise reduction effect than a single silencer.

[0021] 3. When using this invention, the linkage structure design of the device improves the adaptability and stability of operation. The servo motor drives the adjustment of the fan plate, the displacement of the baffle, and the extension and retraction of the spiral guide mechanism synchronously through the transmission shaft. The components cooperate precisely through pulley transmission, gear meshing, etc., to ensure that the air volume adjustment and noise reduction measures respond synchronously. At the same time, the cooperation between the guide ring assembly and the guide groove ensures the stability of the pipe sleeve mechanism displacement, and the sealing ring prevents airflow leakage from interfering with the noise reduction effect. The overall structure adapts to different working conditions while maintaining a high-efficiency and low-noise operating state, overcoming the defects of poor adaptability of traditional structures. Attached Figure Description

[0022] Figure 1 This is a front perspective view of a portion of the structure of a cooling tower fan inlet air guiding and noise reduction device according to the present invention.

[0023] Figure 2 This is a right-side perspective view of the assembled cooling tower fan inlet air guiding and noise reduction device according to the present invention;

[0024] Figure 3 This is a perspective view of the housing mechanism and pipe assembly of a cooling tower fan inlet air guiding and noise reduction device according to the present invention;

[0025] Figure 4 This is a perspective view of the spiral guide mechanism and guide groove combination of a cooling tower fan inlet air guiding and noise reduction device according to the present invention;

[0026] Figure 5 This is a top perspective view of a cooling tower fan inlet air guiding and noise reduction device according to the present invention;

[0027] Figure 6This is a perspective view of a noise-reducing sponge and a porous noise-reducing plate combination for a cooling tower fan inlet air guiding and noise reduction device according to the present invention.

[0028] Figure 7 This is a left perspective view of a cooling tower fan inlet air guiding and noise reduction device according to the present invention;

[0029] Figure 8 This invention relates to a cooling tower fan inlet airflow guiding and noise reduction device. Figure 7 Enlarged 3D view at point A in the middle;

[0030] In the diagram: 1. Cover mechanism; 101. Mounting plate; 1011. Mounting hole; 1012. Pipe assembly; 1013. Connecting ring sleeve; 1014. Guide ring assembly; 1015. Sealing ring; 2. Support mechanism; 201. Servo motor; 2011. Drive shaft; 2012. Direct pulley; 2013. Direct belt; 2014. Fan plate assembly A; 2015. Indirect pulley; 2016. Indirect belt; 2017. Drive gear; 2018. Fan plate assembly B; 2019. Driven gear 3. Pipe sleeve mechanism; 301. Baffle assembly; 3011. Flange A; 3012. Connecting hole; 3013. Noise reduction shield; 3014. Guide groove; 4. Spiral guide mechanism; 401. Guide groove; 5. Linkage mechanism; 501. Connecting shaft; 5011. Connecting plate; 5012. Guide rod assembly; 5013. Stop block assembly; 5014. Splicing support plate; 6. Flange B; 601. Fixing bolt; 6011. Sleeve assembly; 6012. Noise reduction sponge; 6013. Porous noise reduction plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Please see Figures 1-8 As shown, the present invention provides a technical solution: a cooling tower fan inlet air guiding and noise reduction device, including a cover mechanism 1, a pipe assembly 1012 fixedly connected to the right end face of the cover mechanism 1, and a connecting ring sleeve 1013 with an annular structure fixedly connected to the inner wall of the pipe assembly 1012.

[0034] A guide ring assembly 1014 is fixedly connected to the side of the pipe assembly 1012 away from the cover mechanism 1. The diameter of the guide ring assembly 1014 is larger than that of the pipe assembly 1012, and an annular groove is formed on the outer circumferential surface of the guide ring assembly 1014. A sealing ring 1015 is embedded inside the annular groove. A pipe sleeve mechanism 3 is sleeved on the outer side of the pipe assembly 1012. A spiral guide mechanism 4 is fixedly connected to the inner side of the pipe sleeve mechanism 3. The left end face of the spiral guide mechanism 4 is fixedly connected to the right end face of the connecting ring sleeve 1013. The spiral guide mechanism 4 is a pressure-contracting structure. A guide groove 401 is formed on the inner wall of the spiral guide mechanism 4. The guide groove 401 and the spiral guide mechanism 4 together form a guide and conveying structure for airflow. A baffle assembly 301 is fixedly connected to the right side of the outer circumferential surface of the pipe sleeve mechanism 3. The baffle assembly 301 is an annular structure, and a noise reduction shield 3013 is fixedly connected to the left end face of the baffle assembly 301. The cover 3013 is a flexible telescopic structure. The side of the noise reduction cover 3013 away from the baffle assembly 301 is fixedly connected to the right end of the cover mechanism 1. The left side of the cover mechanism 1 is provided with an opening for connecting to the air inlet of the cooling tower. The outer side of the cover mechanism 1 is provided with an inclined surface. An installation plate 101 is fixedly connected to the outer side of the inclined surface. There are four installation plates 101, which are fixedly connected to the four corners of the outer side of the cover mechanism 1. The interior of each of the four installation plates 101 is provided with an installation hole 1011. The outer side of the baffle assembly 301 is fixedly connected with a flange A3011. The interior of the flange A3011 is provided with a ring array of connection holes 3012. The inner wall of the sleeve mechanism 3 is provided with an annular groove, which is a guide groove 3014. The guide groove 3014 is used to guide the guide ring assembly 1014. The outer peripheral surface of the sealing ring 1015 is in contact with the inner wall of the guide groove 3014.

[0035] In this embodiment, during the installation phase of the device, it is connected to the air inlet of the cooling tower through the opening on the left side of the cover mechanism 1. The device is fixed to the air inlet of the cooling tower by fasteners such as bolts using the mounting plates 101 at the four corners of the outer side of the cover mechanism 1 and the mounting holes 1011 inside, ensuring that the device will not be displaced or shaken due to the impact of airflow during operation. The spiral guide mechanism 4 can be made of rubber material.

[0036] When the cooling tower fan starts, outside air enters the device through the right opening of the sleeve assembly 6011. It first flows through the sleeve assembly 6011, which is a ring structure that runs through both sides. The noise-reducing sponge 6012 attached to its inner wall is soft and porous, which can initially absorb the high-frequency noise contained in the incoming airflow. At the same time, the porous noise-reducing plate 6013 fixedly connected to the inner wall of the noise-reducing sponge 6012 is a tubular structure. The through holes in the ring array inside it will divide the airflow into multiple small airflows, reduce the overall impact intensity of the airflow, reduce the noise generated by the violent collision of airflows, and complete the first-stage noise reduction treatment.

[0037] The airflow processed by the sleeve assembly 6011 continues to flow forward and enters the tube sleeve mechanism 3 through the gap between the splicing support plates 5014 distributed in a ring array on the right end face of the baffle assembly 5013. The left end face of the spiral guide mechanism 4, which is fixedly connected to the inner side of the tube sleeve mechanism 3, is fixed to the right end face of the connecting ring 1013 on the inner wall of the pipe assembly 1012. The guide grooves 401 opened on its inner wall are spirally distributed, which guides the airflow to flow along the spiral path, making the originally chaotic airflow orderly, reducing the mutual friction and turbulence between airflows, thereby reducing the noise caused by airflow turbulence.

[0038] Since the spiral guide mechanism 4 is a pressure-contracting structure, when the incoming air volume increases, the pressure of the airflow on the spiral guide mechanism 4 increases, causing it to undergo a small-range contraction deformation, shortening the flow path of the airflow within the spiral guide mechanism 4, and avoiding excessive accumulation of airflow in the guide groove 401 due to excessive air volume, which would generate noise. When the air volume decreases, the spiral guide mechanism 4 will naturally extend, lengthening the guide path, ensuring that the airflow can be fully guided and maintaining the stability of the guide effect.

[0039] After passing through the spiral guide mechanism 4, the airflow enters the pipe assembly 1012. The diameter of the guide ring assembly 1014 fixed on the side of the pipe assembly 1012 away from the cover mechanism 1 is larger than that of the pipe assembly 1012. The sealing ring 1015 embedded in the annular groove on its outer circumference fits tightly with the inner wall of the guide groove 3014 on the inner wall of the sleeve mechanism 3 to form a sealing structure, preventing the airflow from leaking from the gap between the pipe assembly 1012 and the sleeve mechanism 3 during the transportation process, and avoiding the leakage airflow from colliding with the outside air and generating additional noise.

[0040] Meanwhile, the noise reduction shield 3013 fixed on the left end of the annular baffle assembly 301 fixed on the right side of the outer periphery of the tube sleeve mechanism 3 is a flexible telescopic structure. The side of the shield away from the baffle assembly 301 is fixed to the right end of the cover mechanism 1. It will expand and contract with the relative displacement between the tube sleeve mechanism 3 and the cover mechanism 1, always covering the connection part between the pipe assembly 1012 and the tube sleeve mechanism 3, further blocking the noise inside the device from spreading outward and enhancing the basic noise reduction effect.

[0041] Example 2

[0042] like Figures 1-5 As shown, a support mechanism 2 is fixedly connected to the top surface of the cover mechanism 1. The main body of the support mechanism 2 is L-shaped, and a servo motor 201 is fixedly connected to the top surface of the support mechanism 2. An output shaft is provided at the bottom end of the servo motor 201, and a transmission shaft 2011 is mounted on the output shaft via a coupling. The bottom end of the transmission shaft 2011 is connected to the cover mechanism 1 via a bearing seat. A wind vane assembly A2014 and a wind vane assembly B2018 are rotatably connected inside the left opening of the cover mechanism 1. A direct pulley 2012 is coaxially mounted on the top of both the transmission shaft 2011 and the wind vane assembly A2014. A direct belt 20 is also mounted on the outer side of the two direct pulleys 2012. 13. The direct pulley 2012 and the direct belt 2013 together form a power transmission structure. The top of the cover mechanism 1 is rotatably connected to the drive gear 2017. The outer circumferential surface of the transmission shaft 2011 and the top of the drive gear 2017 are also coaxially mounted with the indirect pulley 2015. The indirect pulley 2015 is located directly above the direct pulley 2012. The outer sides of the two indirect pulleys 2015 are also mounted with the indirect belt 2016. The top of the air deflector assembly B2018 is also coaxially mounted with the driven gear 2019. The drive gear 2017 and the driven gear 2019 mesh and transmit power. The air deflector assembly A2014 and the air deflector assembly B2018 are opposite opening structures.

[0043] In this embodiment, when the cooling tower is in operation and the air intake of the fan decreases due to changes in operating conditions, the device needs to adjust the air volume to ensure the air intake while avoiding storm noise. At this time, the servo motor 201 fixed on the top surface of the cover mechanism 1 by the bracket mechanism 2 receives the adjustment signal and starts. Its bottom output shaft drives the transmission shaft 2011 to start rotating through the coupling. The bottom end of the transmission shaft 2011 is connected to the cover mechanism 1 through the bearing seat to ensure that the rotation process is stable and without deviation.

[0044] The direct pulley 2012, which is coaxially mounted at the top of the drive shaft 2011, rotates synchronously with the drive shaft 2011. For example, when the drive shaft 2011 rotates counterclockwise in a top view, since the two direct pulleys 2012 are equipped with direct belts 2013 on their outer sides, and another direct pulley 2012 is coaxially mounted at the top of the air deflector assembly A2014, the air deflector assembly A2014 rotates synchronously with the drive shaft 2011 under the transmission action of the direct belt 2013. Its rotation angle inside the opening on the left side of the cover mechanism 1 gradually changes, and the cross-sectional area of ​​the air inlet channel begins to increase.

[0045] At the same time, the indirect pulley 2015, which is coaxially mounted on the outer peripheral surface of the drive shaft 2011 and located directly above the direct pulley 2012, also rotates with the drive shaft 2011. Through the indirect belt 2016 mounted on the outer side, it drives another indirect pulley 2015, which is coaxially mounted on the top of the drive gear 2017, to rotate, thereby causing the drive gear 2017 to rotate at the top of the cover mechanism 1.

[0046] The drive gear 2017 meshes with the driven gear 2019, which is coaxially mounted on the top of the air deflector assembly B2018. Driven by the drive gear 2017, the driven gear 2019 rotates in the opposite direction, causing the air deflector assembly B2018 to rotate in the opposite direction to the air deflector assembly A2014 inside the opening on the left side of the cover mechanism 1. Since the air deflector assembly A2014 and the air deflector assembly B2018 are opposite opening structures, their opposite rotation will further increase the cross-sectional area of ​​the air intake channel, allowing smaller air volumes to pass through more quickly. This reduces the problem of storm noise and slow air intake and heat dissipation caused by excessive contact between the air volume and the air deflector assembly A2014 and the air deflector assembly B2018.

[0047] During the rotation of the drive shaft 2011, the linkage mechanism 5 installed in its middle section also rotates. The side of the linkage mechanism 5 away from the drive shaft 2011 is connected to the connecting plate 5011 through the connecting shaft 501. Under the pulling action of the linkage mechanism 5, the connecting plate 5011 drives the guide rod assembly 5012 to move to the left through the connecting shaft 501 at the other end.

[0048] The stop assembly 5013 fixed on the right side of the guide rod assembly 5012 is a frustoconical structure that is thinner on the left and thicker on the right. When it moves to the left with the guide rod assembly 5012, the maximum diameter of the stop assembly 5013 is the same as the opening diameter of the right end face of the sleeve mechanism 3. As the gap narrows, it will block the airflow entering the sleeve mechanism 3, further limiting the air volume. With the adjustment of the air deflector assembly A2014 and the air deflector assembly B2018, the noise caused by excessive air volume is avoided. At this time, the sleeve mechanism 3 and the auxiliary components installed on its outside can be moved to the left together by the splicing support plate 5014. This allows the sleeve mechanism 3 to move along the guide ring assembly 1014 through the guide groove 3014 opened on its inner wall, further compressing the spiral guide mechanism 4 to shorten the path and reduce noise.

[0049] Example 3

[0050] like Figures 2-6As shown, a linkage mechanism 5 is installed in the middle section of the outer circumference of the drive shaft 2011. A connecting shaft 501 is installed on the side of the linkage mechanism 5 away from the drive shaft 2011, and a connecting plate 5011 is installed through the connecting shaft 501. The side of the connecting plate 5011 away from the linkage mechanism 5 is also hinged to the guide rod assembly 5012 through the connecting shaft 501. The main body of the guide rod assembly 5012 is a cylindrical structure, and a stop assembly 5013 is fixedly connected to the right side of the guide rod assembly 5012. The main body of the stop assembly 5013 is a frustoconical structure that is thinner on the left and thicker on the right. The maximum diameter of the stop assembly 5013 is the same as the opening diameter of the right end face of the sleeve mechanism 3, and there is a gap between the stop assembly 5013 and the sleeve mechanism 3. A splicing support plate 5014 is fixedly connected in a ring array on the right end face of the stop assembly 5013. The splicing support plate 5014 is located away from the stop block. One side of component 5013 is connected to the sleeve mechanism 3. The gap between the splicing support plates 5014 is for air to pass through. Flange B6 is installed on the right side of flange A3011. The diameter of flange B6 is the same as that of flange A3011. Flange B6 also has through holes arranged in a ring array inside. Flange A3011 and flange B6 are connected by fixing bolts 601. Sleeve assembly 6011 is fixedly connected to the right side of flange B6. Sleeve assembly 6011 has a ring structure and a two-way through structure on both the left and right sides. Noise-reducing sponge 6012 is adhered to the inner wall of sleeve assembly 6011. A porous noise-reducing plate 6013 is also fixedly connected to the inner wall of noise-reducing sponge 6012. The porous noise-reducing plate 6013 has a tubular structure and through holes arranged in a ring array inside.

[0051] In this embodiment, when the air intake of the cooling tower fan increases during use, in order to ensure the noise reduction effect of the cooling tower air intake structure, the device needs to control the air intake volume and speed to maintain the noise reduction effect. At this time, the servo motor 201 receives a reverse adjustment signal, and the output shaft drives the transmission shaft 2011 to rotate in the opposite direction. Through the transmission action of the direct pulley 2012 and the direct belt 2013, the air plate assembly A2014 rotates in the direction of increasing the cross-sectional area of ​​the air intake channel.

[0052] While the drive shaft 2011 rotates in the opposite direction, the indirect pulley 2015 and the indirect belt 2016 drive the drive gear 2017 to rotate in the opposite direction, which in turn drives the wind vane assembly B2018 to rotate in the direction of reducing the cross-sectional area of ​​the air inlet channel through the driven gear 2019. The opposing opening angle of the wind vane assembly A2014 and the wind vane assembly B2018 is reduced, so that the external air can enter the device at a slower pace.

[0053] When the drive shaft 2011 rotates in the reverse direction, the linkage mechanism 5 in the middle section moves in the reverse direction, and pulls the guide rod assembly 5012 to the left through the connecting plate 5011, increasing the obstruction of the airflow and reducing the instantaneous airflow entering the sleeve mechanism 3.

[0054] Since the left end face of the spiral guide mechanism 4 is fixed to the connecting ring 1013 and the right end face is fixed to the inside of the sleeve mechanism 3, the leftward movement of the sleeve mechanism 3 will cause the spiral guide mechanism 4 to gradually extend from the contracted state. The spiral path length of the guide groove 401 on its inner wall increases, which can guide the airflow more fully and further reduce the noise generated by airflow turbulence.

[0055] During this process, the guide ring assembly 1014 moves synchronously with the sleeve mechanism 3 within the guide groove 3014, and the sealing ring 1015 always fits against the inner wall of the guide groove 3014 to ensure the sealing effect and prevent airflow leakage from affecting the noise reduction and airflow guiding effect. Through the coordinated operation of each structure, the air volume adjustment and noise reduction functions are coordinated to ensure that the device can maintain efficient operation and good noise reduction effect under different air volume conditions.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cooling tower fan inlet airflow guiding and noise reduction device, comprising a cover mechanism (1), characterized in that, The right end face of the cover mechanism (1) is fixedly connected to the pipe assembly (1012), and the inner wall of the pipe assembly (1012) is fixedly connected to the connecting ring sleeve (1013) with an annular structure. A guide ring assembly (1014) is fixedly connected to the side of the connector assembly (1012) away from the cover mechanism (1). The diameter of the guide ring assembly (1014) is larger than that of the connector assembly (1012), and an annular groove is formed on the outer circumferential surface of the guide ring assembly (1014). A sealing ring (1015) is embedded inside the annular groove. A sleeve mechanism (3) is sleeved on the outside of the connector assembly (1012), and a spiral guide mechanism (4) is fixedly connected to the inside of the sleeve mechanism (3). The left end face of the spiral guide mechanism (4) is fixedly connected to the right end face of the connecting ring (1013), and the spiral guide mechanism (4)... As a pressure-shrinking structure, a guide groove (401) is provided on the inner wall of the spiral guide mechanism (4). The guide groove (401) and the spiral guide mechanism (4) together form a guide and conveying structure for airflow. A baffle assembly (301) is fixedly connected to the right side of the outer peripheral surface of the sleeve mechanism (3). The baffle assembly (301) is a ring structure. A noise reduction shield (3013) is fixedly connected to the upper and lower left end face of the baffle assembly (301). The noise reduction shield (3013) is a flexible telescopic structure. The side of the noise reduction shield (3013) away from the baffle assembly (301) is fixedly connected to the right end of the cover mechanism (1).

2. The cooling tower fan inlet air guiding and noise reduction device according to claim 1, characterized in that: The cover mechanism (1) has an opening on its left side, which is used to connect with the air inlet of the cooling tower. The cover mechanism (1) has an inclined surface on its outer side, and an installation plate (101) is fixedly connected to the outer side of the inclined surface. There are four installation plates (101).

3. The cooling tower fan inlet air guiding and noise reduction device according to claim 2, characterized in that: The four mounting plates (101) are fixedly connected to the four corners of the outer side of the cover mechanism (1). The four mounting plates (101) are provided with mounting holes (1011). The outer side of the baffle assembly (301) is fixedly connected to the flange A (3011). The flange A (3011) is provided with connecting holes (3012) in a ring array. The inner wall of the sleeve mechanism (3) is provided with an annular groove, which is a guide groove (3014). The guide groove (3014) is used to guide the guide ring assembly (1014). The outer circumferential surface of the sealing ring (1015) is in contact with the inner wall of the guide groove (3014).

4. The cooling tower fan inlet airflow guiding and noise reduction device according to claim 1, characterized in that: A support mechanism (2) is fixedly connected to the top surface of the cover mechanism (1). The main body of the support mechanism (2) is an L-shaped structure, and a servo motor (201) is fixedly connected to the top surface of the support mechanism (2). An output shaft is provided at the bottom end of the servo motor (201). A transmission shaft (2011) is installed on the output shaft through a coupling. The bottom end of the transmission shaft (2011) is connected to the cover mechanism (1) through a bearing seat. A wind plate assembly A (2014) and a wind plate assembly B (2018) are rotatably connected inside the left opening of the cover mechanism (1).

5. The cooling tower fan inlet airflow guiding and noise reduction device according to claim 4, characterized in that: The top ends of the drive shaft (2011) and the air plate assembly A (2014) are coaxially mounted with pulleys (2012), and direct belts (2013) are also mounted on the outer sides of the two pulleys (2012). The pulleys (2012) and the direct belts (2013) together form a power transmission structure. The top end of the cover mechanism (1) is rotatably connected with a drive gear (2017).

6. The cooling tower fan inlet air guiding and noise reduction device according to claim 5, characterized in that: The outer circumferential surface of the drive shaft (2011) and the top of the drive gear (2017) are also coaxially mounted with an indirect pulley (2015). The indirect pulley (2015) is located directly above the direct pulley (2012), and an indirect belt (2016) is also installed on the outer side of the two indirect pulleys (2015). The top of the wind vane assembly B (2018) is also coaxially mounted with a driven gear (2019). The drive gear (2017) and the driven gear (2019) mesh and drive each other. The wind vane assembly A (2014) and the wind vane assembly B (2018) are opposite opening structures.

7. The cooling tower fan inlet air guiding and noise reduction device according to claim 6, characterized in that: A linkage mechanism (5) is installed in the middle section of the outer peripheral surface of the drive shaft (2011). A connecting shaft (501) is installed on the side of the linkage mechanism (5) away from the drive shaft (2011), and a connecting plate (5011) is installed through the connecting shaft (501). The side of the connecting plate (5011) away from the linkage mechanism (5) is also hinged to the guide rod assembly (5012) through the connecting shaft (501).

8. The cooling tower fan inlet air guiding and noise reduction device according to claim 7, characterized in that: The main body of the guide rod assembly (5012) is a cylindrical structure, and a stop assembly (5013) is fixedly connected to the right side of the guide rod assembly (5012). The main body of the stop assembly (5013) is a frustoconical structure with a thinner left side and a thicker right side. The maximum diameter of the stop assembly (5013) is consistent with the opening diameter of the right end face of the sleeve mechanism (3). There is a gap between the stop assembly (5013) and the sleeve mechanism (3). A splicing support plate (5014) is fixedly connected in a ring array on the right end face of the stop assembly (5013).

9. A cooling tower fan inlet airflow guiding and noise reduction device according to claim 8, characterized in that: The side of the splicing support plate (5014) away from the stop block assembly (5013) is connected to the pipe sleeve mechanism (3). The gap between the splicing support plates (5014) is used for air passage. Flange B (6) is installed on the right side of flange A (3011). The diameter of flange B (6) is the same as that of flange A (3011). Flange B (6) also has through holes arranged in a ring array inside. Flange A (3011) and flange B (6) are connected by fixing bolts (601).

10. A cooling tower fan inlet air guiding and noise reduction device according to claim 9, characterized in that: A sleeve assembly (6011) is fixedly connected to the right side of the flange B (6). The sleeve assembly (6011) is a ring structure and has a bidirectional through structure on both the left and right sides. A noise-reducing sponge (6012) is attached to the inner wall of the sleeve assembly (6011), and a porous noise-reducing plate (6013) is fixedly connected to the inner wall of the noise-reducing sponge (6012). The porous noise-reducing plate (6013) is a tubular structure, and the interior of the porous noise-reducing plate (6013) has through holes arranged in a ring array.

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