Low-noise cooling tower fan

Abstract

The invention provides a low-noise cooling tower fan and relates to the technical field of cooling tower fans, the low-noise cooling tower fan comprises a cooling tower body, an air duct, blades, a noise reduction mechanism and a rotating mechanism, the air duct is located on the upper surface of the cooling tower body, the upper surface of the cooling tower body fixedly communicates with a mounting frame, and a driving motor is mounted in the cooling tower body; a speed reducing mechanism is installed at the position, corresponding to the blades, of the output end of the driving motor, the speed reducing mechanism comprises a speed reducing box, one side of the speed reducing box is rotationally connected with a coupler, and one end of the coupler is fixedly connected with the output end of the driving motor. The noise reduction device solves the problems that in the running process of a cooling tower fan, high-decibel noise can be generated, so that the environment around the cooling tower is prone to being affected, at the moment, a noise reduction barrel is additionally arranged on the surface of the upper end of the cooling tower, noise reduction treatment cannot be further conducted only by additionally arranging the noise reduction barrel outside the cooling tower, and the noise reduction effect is poor. And the problem that the cooling tower is inconvenient to use effectively is solved.

Description

Technical Field

[0001] The invention relates to the technical field of cooling tower fans, and in particular to a low-noise cooling tower fan. Background Art

[0002] A cooling tower is an evaporative heat dissipation device used to lower water temperature. It achieves the recycling of cooling water and greatly reduces the consumption of cooling water by the heat exchange system. A low-noise cooling tower fan is a fan specially designed for cooling towers. Its main purpose is to provide efficient air flow while minimizing the noise generated during operation. It is more common in central air-conditioning systems in large buildings.

[0003] Prior art, such as the invention with publication number CN109281850B, discloses a low-noise coaxial double-impeller cooling tower axial flow fan, which includes a supporting wind tube, a first-stage impeller assembly, a power system supporting chassis, a vibration damper, a vibration damping platform, a belt reduction box assembly, a guide wind tube assembly, an upper wind tube and a second-stage impeller assembly. By using the same power system to configure a 1.5-stage double-impeller axial flow fan in the form of a first-stage impeller + guide vane + second-stage impeller structure, under the conditions of meeting the required ventilation volume of the matching cooling tower and the static pressure required to overcome the ventilation resistance, the rotation speed of the impeller blades and the guide vane adopts a linear distribution flow type blade design method in the radial direction, greatly reducing the outer circle circumferential speed of the fan working impeller, and correspondingly increasing the blade chord length or number of blades of the impeller, and the blade installation angle measures to achieve a 1.5-stage double-impeller axial flow fan for the cooling tower. Compared with a single-impeller axial flow fan, active noise reduction is achieved under the same ventilation volume and fan static pressure, and a low-noise emission effect is obtained.

[0004] It was found in the low-noise cooling tower fan that when the cooling tower in the prior art is in use, the existing cooling tower fan will usually generate high-decibel noise during operation, which is easy to affect the environment around the cooling tower. At this time, a silencer will be installed on the upper surface of the cooling tower. Since only relying on the installation of a silencer on the outside of the cooling tower cannot further reduce the noise, it will lead to the problem of inconvenience in the effective use of the cooling tower. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the cooling tower fan will generate high-decibel noise during operation, which is easy to affect the environment around the cooling tower. At this time, a silencer will be installed on the upper surface of the cooling tower. Since only relying on the silencer installed on the outside of the cooling tower cannot further reduce the noise, it makes it inconvenient to use the cooling tower effectively.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a low-noise cooling tower fan, comprising a cooling tower body, an air guide tube, blades, a noise reduction mechanism and a rotating mechanism, the air guide tube is located on the upper surface of the cooling tower body, the upper surface of the cooling tower body is fixedly connected to a mounting frame, a driving motor is installed inside the cooling tower body, and a reduction mechanism is installed at the position of the blade corresponding to the output end of the driving motor, the reduction mechanism comprises a reduction box, one side of the reduction box is rotatably connected with a coupling, one end of the coupling is fixedly connected to the output end of the driving motor, a rotating shaft and a driving shaft are rotatably connected inside the reduction box, a plurality of blades are installed at the upper end of the driving shaft, a first helical gear is fixedly connected to the circular arc surface of the rotating shaft, a second helical gear is fixedly connected to the circular arc surface of the driving shaft, the first helical gear is meshed with the second helical gear, the circular arc surface of the rotating shaft is located at the upper end of the first helical gear and is fixedly connected to the second spur bevel gear, one end of the coupling is fixedly connected to the first spur bevel gear, the first spur bevel gear and the second spur bevel gear are meshed. The tooth surfaces of the gears are meshed with each other. An oil system is arranged on one side surface of the reduction box. The oil system includes an oil pipe. One end of the oil pipe is fixedly connected to one side surface of the reduction box. An oil mark is installed on the end of the oil pipe away from the reduction box. An air vent is fixedly connected to the upper surface of the reduction box. The noise reduction mechanism is arranged on the upper surface of the cooling tower body and is located directly above the reduction mechanism and the blades. The noise reduction mechanism includes four noise reduction plates. The four noise reduction plates are evenly distributed on the inner wall of the mounting frame. Both side surfaces of the noise reduction plates are connected to the inner wall of the mounting frame. Plug-in, a plurality of noise reduction holes are provided on the surface of the noise reduction plate, the noise reduction plate is a polyester fiber composite plate, two mounting holes are provided on the surfaces of one side of the two noise reduction plates close to each other, and plug-in holes are provided on the surface of the mounting frame corresponding to the mounting holes, and a mounting shaft is fixedly connected to the surface of the mounting frame corresponding to the plug-in holes, a mounting plate is slidably penetrated through the surface of the mounting shaft, a plug-in rod is fixedly connected to the surface of the mounting plate corresponding to the plug-in hole, the surface of the plug-in rod is plugged into the inner wall of the mounting hole, and the arc surface of the mounting shaft is threadedly connected to the extrusion shaft.

[0007] Preferably, the arc surface of the mounting shaft is fixedly connected with a positioning frame, the cross-section of the positioning frame is cross-shaped, the cross-sectional dimensions of the positioning frame are adapted to the cross-sectional dimensions of the mounting plate, the arc surface of the mounting shaft is sleeved with a protective ring, the surface of the protective ring is in contact with one side surface of the extrusion shaft.

[0008] Preferably, a plurality of protrusions are fixedly connected to the inner wall surface of the mounting frame near the blades, and the protrusions are evenly distributed on the surface of the mounting frame. The cross section of one end of the insertion rod near the insertion hole is a pointed cone, and the insertion rod is a carbide rod.

[0009] Preferably, a silencer mechanism is provided on the inner wall of the mounting frame, and the silencer mechanism includes four docking plates and a silencer body, one ends of the four docking plates are evenly distributed on the inner wall surface of the mounting frame, the silencer body is located directly above the blade, one end of the docking plate is fixedly connected to the inner wall surface of the mounting frame, the arc surface of the silencer body is fixedly connected with a docking plate at the position corresponding to the docking plate, the surface of the docking plate abuts against the surface of the docking plate, an inlay groove is provided on the surface of the docking plate, the cross-section of the inlay groove is vertical, a docking rod is fixedly connected to the surface of the docking plate, the arc surface of the docking rod is movably connected with an inlay block, the arc surface of the docking rod is sleeved with a tension spring, the two ends of the tension spring are respectively fixedly connected to the inlay block and the docking rod, the docking rod and the inlay block slide through the inlay groove, and a limiting groove is provided on the surface of the docking plate corresponding to the positions on both sides of the inlay groove, and the inner wall of the limiting groove is snap-fitted with the surface of the inlay block.

[0010] Preferably, a connecting frame is fixedly connected to the surface of the connecting plate, and a hanging ring is rotatably connected to the inner wall of the connecting frame.

[0011] Preferably, two limiting columns are fixedly connected to the surface of the docking plate, the two limiting columns are respectively located on both sides of the docking rod, and the arc surface of the limiting column is slidably plugged into the inner wall of the inlay groove.

[0012] Preferably, an assembly mechanism is provided on the upper surface of the installation frame, and the assembly mechanism includes a fixed seat, the lower surface of the fixed seat abuts against the upper surface of the installation frame, the arc surface of the fixed seat is fixedly connected to a plurality of connecting frames, and the surfaces of the plurality of connecting frames are slidably penetrated by moving rods, the arc surface of the moving rod is sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the moving rod and the connecting frame, the arc surface of the installation frame is fixedly connected to a fixed frame at a position corresponding to the moving rod, the inner wall of the fixed frame is rotatably connected to a rotating rod, and the upper inner wall of the rotating rod is plugged into the surface of the moving rod.

[0013] Preferably, a pull ring is rotatably connected to the surface of the moving rod, and the cross-section of the pull ring is vertical.

[0014] Preferably, a plurality of auxiliary rods are fixedly connected to the inner wall surface of the fixing seat, and the cross-sectional size of the fixing seat is matched with the cross-sectional size of the installation frame.

[0015] Preferably, the air guide tube is fixedly connected to the fixed seat by means of a rotating mechanism, the rotating mechanism includes a rotating groove, the rotating groove is opened on the surface of the fixed seat, the inner wall of the rotating groove is plugged into the bottom end of the air guide tube, and the bottom arc surface of the air guide tube is fixedly connected with a plurality of connecting plates, and the cross-sections of the plurality of connecting plates are "L"-shaped, and the short arm end surface of the connecting plate is threaded with an extrusion rod, and the arc surface of the fixed seat is provided with an extrusion groove, and the extrusion rod is rotatably connected with an extrusion block near the extrusion groove, and the surface of the extrusion block is plugged into the inner wall of the extrusion groove.

[0016] Preferably, one side of the extrusion block is fixedly connected to a limiting rod, and one end surface of the limiting rod slides through the end surface of the short arm of the connecting plate.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are: 1. In the present invention, by setting a noise reduction mechanism, during the operation of the cooling tower body, since the fan noise inside the cooling tower body is relatively large, in order to reduce and offset the noise generated by the fan, a noise reduction plate made of a polyester fiber composite plate in the noise reduction mechanism is used for auxiliary operation. By fixing and limiting the noise reduction plate, the noise reduction operation of the fan of the entire cooling tower body can be effectively and conveniently performed for a long time.

[0018] 2. In the present invention, by setting up a silencer mechanism, the noise generated by the high-speed rotation of the fan blades in the cooling tower body can be absorbed. At the same time, effective assembly and positioning can be performed with the help of the connecting plates on the surrounding surfaces of the silencer body and the docking plates fixed on the inner wall of the installation frame, which is helpful for the installation protection and limiting use of the entire silencer body position.

[0019] 3. In the present invention, by setting up an assembly mechanism, when the air guide tube at the upper end of the cooling tower body is used, in order to avoid the influence of external environmental factors during long-term use, the air guide tube is plugged and fixed with the help of a moving rod in the connecting frame of the assembly mechanism and a rotating rod rotating on the surface of the fixed frame. At the same time, the position of the moving rod is fixed with the help of the tensile force generated by the spring to prevent it from falling off, and the entire air guide tube can be replaced and fixed effectively and conveniently.

[0020] 4. In the present invention, by setting a rotating mechanism, when the air guide tube on the upper surface of the cooling tower body is used, in order to adjust the direction of the entire air guide tube, the rotating groove on the surface of the fixed seat and the bottom surface of the air guide tube are used for rotation operation, and then the connecting plate fixed at the bottom of the air guide tube is used to allow the extrusion rod rotating on the surface of the connecting plate to drive the movement of the extrusion block, so that the entire extrusion block and the extrusion groove on the surface of the fixed seat are extruded and fixed, which is convenient for the deflection adjustment of the position during the installation of the air guide tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional structural schematic diagram of a low-noise cooling tower fan is proposed for the present invention; Figure 2 The present invention provides a schematic diagram of the internal structure of a low-noise cooling tower fan; Figure 3 A partial schematic diagram of a speed reduction mechanism of a low-noise cooling tower fan proposed by the present invention; Figure 4 A schematic diagram of a noise reduction mechanism for a low-noise cooling tower fan is provided for the present invention; Figure 5 A schematic diagram of the split structure of a noise reduction mechanism of a low-noise cooling tower fan is provided for the present invention; Figure 6 The present invention proposes a low-noise cooling tower fan Figure 4 A schematic diagram of the enlarged structure at B; Figure 7 The present invention provides a structural schematic diagram of an assembly mechanism of a low-noise cooling tower fan; Figure 8 The present invention proposes a low-noise cooling tower fan Figure 7 A schematic diagram of the enlarged structure at point A; Fig. 9 A schematic diagram of the structural disassembly of a rotating mechanism of a low-noise cooling tower fan proposed by the present invention; Fig.10 A partially disassembled schematic diagram of a three-dimensional structure of a low-noise cooling tower fan proposed by the present invention; Fig.11 The present invention provides a schematic diagram of the structural disassembly of a silencer mechanism of a low-noise cooling tower fan.

[0022] Legend: 1. Cooling tower body; 2. Air guide tube; 3. Drive motor; 4. Speed ​​reduction mechanism; 41. First spur bevel gear; 42. Rotating shaft; 43. Drive shaft; 44. Second spur bevel gear; 45. First spiral gear; 46. Second spiral gear; 47. Coupling; 48. Speed ​​reduction box; 5. Blade; 6. Oil system; 61. Oil mark; 62. Air vent; 63. Oil pipe; 7. Noise reduction mechanism; 701. Noise reduction plate; 702. Noise reduction hole; 703. Bump; 704. Mounting hole; 705. Mounting shaft; 706. Positioning frame; 707. Plug hole; 708. Mounting plate; 709. Rod; 710. Protective ring; 711. Extrusion shaft; 8. Assembly mechanism; 81. Fixed seat; 82. Fixed frame; 83. Rotating rod; 84. Connecting frame; 85. Moving rod; 86. Spring; 87. Pull ring; 9. Rotating mechanism; 91. Extrusion block; 92. Rotating groove; 93. Extrusion groove; 94. Connecting plate; 95. Extrusion rod; 96. Limit rod; 10. Installation frame; 11. Silencer mechanism; 1101. Muffler body; 1102. Connecting plate; 1103. Connecting frame; 1104. Lifting ring; 1105. Docking plate; 1106. Docking rod; 1107. Inlay block; 1108. Tension spring; 1109. Limit column; 1110. Inlay groove; 1111. Limit groove. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0025] Embodiment 1, as Figure 1-11 As shown, the present invention provides a low-noise cooling tower fan, including a cooling tower body 1, an air guide 2, a speed reduction mechanism 4, blades 5, an oil system 6 and a driving motor 3, wherein the speed reduction mechanism 4, blades 5, the oil system 6 and the driving motor 3 are located inside the cooling tower body 1, and constitute the fan of the entire cooling tower body 1. The driving motor 3 installed inside the cooling tower body 1 drives the coupling 47 in the speed reduction mechanism 4 to rotate, and the coupling 47 drives the first spur bevel gear 41 and the second spur bevel gear 44 in the reduction box 48 to rotate, and then the second spur bevel gear 44 drives the first helical gear 45 on the surface of the rotating shaft 42 and the second helical gear 46 on the surface of the driving shaft 43 to rotate relative to each other, so that the driving shaft 43 in the reduction box 48 drives the blades 5 installed at the upper end to rotate.

[0026] At the same time, an oil system 6 is installed on one side of the reduction box 48, and the air vent 62 in the oil system 6 can provide a good environment for the internal air of the reduction box 48. At the same time, the oil pipe 63 in the oil system 6 is matched with the oil mark 61 to lubricate and ventilate the gears and shafts in the entire reduction box 48. After the fan composed of the entire cooling tower body 1 is driven, the fan in the cooling tower body 1 generates negative pressure through its rotating blades 5, thereby inhaling the surrounding air, wherein the air guide tube 2 on the upper surface of the cooling tower body 1 can effectively guide the direction of air flow to ensure that the airflow moves along a predetermined path, and then the inhaled air is guided to the filler or water surface of the cooling tower body 1, so that the air and water are fully in contact and heat exchange. When the air flows through the water surface, the heat is transferred from the water to the air. When the water temperature drops and the air temperature rises, the air after heat exchange is discharged from the cooling tower by the fan, taking away the heat in the water, thereby achieving a cooling effect. When the fan is running, it will generate high decibel noise. At this time, auxiliary noise reduction operation can be performed by using the noise reduction mechanism 7 corresponding to the fan position in the cooling tower body 1. By installing and fixing the noise reduction plate 701 at the upper end of the fan using the installation frame 10, the noise reduction treatment of the entire fan can be performed. The entire muffler body 1101 can also be assembled in the installation frame 10 with the help of the muffler mechanism 11 to absorb the noise generated by the rotating fan. The connection plate 1102 fixed on the surface of the muffler body 1101 and the docking plate 1105 fixed on the inner wall of the installation frame 10 are installed and docked. At the same time, in order to facilitate the installation and positioning of the air guide 2 when it is used for a long time, the moving rod 85 in the connection frame 84 of the assembly mechanism 8 is plugged and fixed with the rotating rod 83 rotating on the surface of the fixed frame. At the same time, the position of the moving rod 85 is fixed with the tensile force generated by the spring 86 to prevent it from falling off, and the entire air guide 2 can be replaced and fixed effectively and conveniently. When the air guide tube 2 on the upper surface of the cooling tower body 1 is used, in order to adjust the direction of the entire air guide tube 2, a rotating groove is opened on the surface of the fixed seat 81 and the bottom surface of the air guide tube 2 is rotated to facilitate the position deflection adjustment during the installation of the air guide tube 2.

[0027] The specific arrangement and functions of the noise reduction mechanism 7, the assembly mechanism 8, the rotation mechanism 9 and the silencer mechanism 11 are described in detail below.

[0028] like Figure 4 , Figure 5 and Figure 6As shown, the noise reduction mechanism 7 is arranged on the upper surface of the cooling tower body 1 and is located directly above the speed reduction mechanism 4 and the blades 5. The noise reduction mechanism 7 includes four noise reduction plates 701, which can effectively reduce noise. The four noise reduction plates 701 are evenly distributed on the inner wall of the installation frame 10. Both side surfaces of the noise reduction plates 701 are plugged with the inner wall of the installation frame 10. The surface of the noise reduction plates 701 is provided with a plurality of noise reduction holes 702, which can absorb noise. The noise reduction plates 701 are polyester fiber composite plates, and two mounting holes 704 are provided on the side surfaces of the two noise reduction plates 701 close to each other, and the mounting holes 704 can facilitate the installation of the noise reduction plates 701. A plug hole 707 is provided on the surface of the mounting frame 10 at a position corresponding to the mounting hole 704, and the plug hole 707 facilitates the plugging and fixing of the plug rod 709 on the surface of the mounting plate 708. A mounting shaft 705 is fixedly connected to the position corresponding to the plug hole 707 on the surface of the mounting frame 10, and the mounting shaft 705 is docked and limited with the mounting plate 708, so as to facilitate the fixing of the mounting plate 708. One end of the mounting shaft 705 passes through the mounting plate 708, and a plug rod 709 is fixedly connected to the position corresponding to the plug hole 707 on the surface of the mounting plate 708, and the end of the plug rod 709 is plugged into the inner wall of the mounting hole 704. The arc surface of the mounting shaft 705 is threadedly connected with an extrusion shaft 711, with the aid of which the mounting plate 708 can be extruded and fixed. The arc surface of the mounting shaft 705 is fixedly connected with a positioning frame 706, the cross-section of the positioning frame 706 is cross-shaped, and the positioning frame 706 can prevent the mounting plate 708 from shifting in position. The cross-sectional size of the positioning frame 706 matches the cross-sectional size of the mounting plate 708. The arc surface of the mounting shaft 705 is sleeved with a protective ring 710, the surface of the protective ring 710 abuts against one side surface of the extrusion shaft 711, and the protective ring 710 can increase friction to prevent the extrusion shaft 711 from sliding. A plurality of protrusions 703 are fixedly connected to the inner wall surface of the mounting frame 10 near the blade 5. The protrusions 703 are evenly distributed on the surface of the mounting frame 10. The protrusions 703 can increase the roughness of the inner surface of the mounting frame 10, which helps to better absorb sound. The cross-section of one end of the plug rod 709 near the socket 707 is in a pointed cone shape, and the plug rod 709 is a carbide rod.

[0029] When the noise reduction treatment is performed at the position near the fan in the cooling tower body 1, the noise reduction treatment is performed by using the noise reduction plate 701 inserted and limited inside the installation frame 10 and the noise reduction hole 702 opened on the surface of the noise reduction plate 701. At the same time, the installation plate 708 on the surface of the installation frame 10 and the insertion rod 709 are matched to allow the insertion rod 709 to be inserted into the installation holes 704 opened on both sides of the noise reduction plate 701, and then fixed with the installation plate 708 and the installation shaft 705 on the surface of the installation frame 10, so that the noise reduction plate 701 can be replaced and limited after long-term use.

[0030] like Figure 7 and Figure 8 As shown, an assembly mechanism 8 is provided on the upper surface of the installation frame 10, and the assembly mechanism 8 includes a fixed seat 81. The fixed seat 81 can be used to protect the fan in the cooling tower body 1. The lower surface of the fixed seat 81 is in contact with the upper surface of the installation frame 10. The arc surface of the fixed seat 81 is fixedly connected with a plurality of connecting frames 84. The connecting frames 84 can facilitate the movement of the position of the moving rod 85. The surfaces of the plurality of connecting frames 84 are slidably penetrated by the moving rod 85. The arc surface of the moving rod 85 is sleeved with a spring 86. The tensile force generated by the spring 86 can fix the position of the moving rod 85. The two ends of the spring 86 are fixedly connected to the moving rod 85 and the connecting frame 84 respectively.

[0031] The arc surface of the mounting frame 10 is fixedly connected with a fixing frame 82 corresponding to the position of the moving rod 85. The inner wall of the fixing frame 82 is rotatably connected with a rotating rod 83. The fixing frame 82 is used to deflect the position of the rotating rod 83. The upper inner wall of the rotating rod 83 is plugged with the surface of the moving rod 85. The upper inner wall of the rotating rod 83 facilitates the docking and fixing of the moving rod 85. The surface of the moving rod 85 is rotatably connected with a pull ring 87. The cross section of the pull ring 87 is vertical. The pull ring 87 can facilitate the pulling of the position of the moving rod 85. The inner wall surface of the fixing seat 81 is fixedly connected with a plurality of auxiliary rods. The cross-sectional size of the fixing seat 81 is adapted to the cross-sectional size of the mounting frame 10. The auxiliary rods can support and protect the inner wall surface of the fixing seat 81.

[0032] When operating the cooling tower body 1, the air guide tube 2 is usually used for auxiliary air flow guidance, and noise reduction can also be performed. At this time, in order to facilitate the adjustment and fixation of the position of the entire air guide tube 2, the rotating rod 83 rotating on the surface of the installation frame 10 is used to make the rotating rod 83 close to the connecting frame 84 on the bottom surface of the air guide tube 2, and then the position of the moving rod 85 is stretched and fixed with the tensile force generated by the spring 86, and the moving rod 85 is plugged and fixed to the inner wall of the upper end of the rotating rod 83 to avoid the shaking of the position of the entire air guide tube 2 and facilitate the installation and fixation of the air guide tube 2.

[0033] like Fig. 9As shown, the air guide tube 2 is fixedly connected to the fixed seat 81 by means of a rotating mechanism 9. The rotating mechanism 9 includes a rotating groove 92. The rotating groove 92 is provided on the surface of the fixed seat 81. The inner wall of the rotating groove 92 is plugged into the bottom end of the air guide tube 2. The rotating groove 92 allows the air guide tube 2 to slide along the inner wall of the bottom end of the groove. The bottom arc surface of the air guide tube 2 is fixedly connected with a plurality of connecting plates 94. The cross section of the connecting plate 94 is "L" shaped. The short arm end surface of the connecting plate 94 is threaded with an extrusion rod 95. The connecting plate 94 allows the position of the extrusion rod 95 to be moved. The arc surface of the fixed seat 81 is provided with an extrusion groove 93. The extrusion rod 95 is rotatably connected with an extrusion block 91 near the extrusion groove 93. The extrusion block 91 can be fixed with the extrusion groove 93 by clamping. The surface of the extrusion block 91 is plugged into the inner wall of the extrusion groove 93. A limiting rod 96 is fixedly connected to one side of the extrusion block 91 , and one end surface of the limiting rod 96 slides through the short arm end surface of the connecting plate 94 . The limiting rod 96 can prevent the extrusion block 91 from shifting in position.

[0034] In order to rotate the position of the entire air guide tube 2, so as to help it face different directions and effectively avoid noise from reaching residents, the bottom end of the entire air guide tube 2 is rotated along the rotation groove 92 with the help of the rotation groove 92 opened on the upper surface of the fixing seat 81. Then, with the help of the extrusion rod 95 fixed on the surface of the connecting plate 94 of the side wall at the bottom end of the air guide tube 2, the extrusion rod 95 drives the extrusion block 91 to move its position, so that the extrusion block 91 is extruded and fixed with the extrusion groove 93 opened on the surface of the fixing seat 81, which helps to adjust the position of the entire air guide tube 2.

[0035] like Fig.10 and Fig.11 As shown, the silencer mechanism 11 includes four docking plates 1105 and a silencer body 1101. One ends of the four docking plates 1105 are evenly distributed on the inner wall surface of the mounting frame 10. One end of the docking plate 1105 is fixedly connected to the inner wall surface of the mounting frame 10, and can effectively abut and limit with the help of the docking plate 1105 and the connecting plate 1102. The silencer body 1101 is located directly above the blade 5, and noise is absorbed by the silencer body 1101.

[0036] The arc surface of the muffler body 1101 is fixedly connected with a connecting plate 1102 at the position of the connecting plate 1105. The surface of the connecting plate 1102 is in contact with the surface of the connecting plate 1105. The surface of the connecting plate 1102 is provided with an inlay groove 1110. The cross section of the inlay groove 1110 is vertical. The inlay groove 1110 is used to penetrate and position the connecting rod 1106. The surface of the connecting plate 1105 is fixedly connected with the connecting rod 1106. The arc surface of the connecting rod 1106 is movably connected with an inlay block 1107, which is helpful for the movable operation of the position of the inlay block 1107. The connecting rod 1106 is provided with an inlay groove 1110. The arc surface of 06 is sleeved with a tension spring 1108, and the tensile force generated by the tension spring 1108 can squeeze and fix the position of the mosaic block 1107, and the two ends of the tension spring 1108 are fixedly connected to the mosaic block 1107 and the docking rod 1106 respectively, and the docking rod 1106 and the mosaic block 1107 slide through the mosaic groove 1110, and the surface of the connecting plate 1102 corresponds to the positions on both sides of the mosaic groove 1110. The inner wall of the limiting groove 1111 is clamped with the surface of the mosaic block 1107, and the limiting groove 1111 can prevent the mosaic block 1107 from shifting in position. The surface of the connecting plate 1102 is fixedly connected to a connecting frame 1103, and the inner wall of the connecting frame 1103 is rotatably connected to a lifting ring 1104. With the help of the lifting ring 1104, the entire silencer body 1101 can be conveniently lifted and transported. The surface of the docking plate 1105 is fixedly connected to two limit columns 1109, and the two limit columns 1109 are respectively located on both sides of the docking rod 1106. The limit columns 1109 can guide the position of the silencer body 1101 to avoid displacement, and the arc surface of the limit column 1109 is slidably inserted into the inner wall of the inlay groove 1110.

[0037] During the operation of the fan in the cooling tower body 1, the high-speed rotating blades 5 in the fan will generate relatively large noise. At this time, the noise can be absorbed with the help of the muffler mechanism 11 which is convenient for installation and limiting. At this time, with the help of the hanging rings 1104 on the surface of the muffler body 1101, the connecting plate 1102 fixed on the surface of the entire muffler body 1101 is abutted against the docking plate 1105 fixed on the inner wall of the installation frame 10, and at the same time, the docking rod 1106 on the surface of the docking plate 1105 is penetrated by the inlay groove 1110 provided on the surface of the docking plate 1102, and then the inlay block 1107 on the arc surface of the docking rod 1106 is clamped and fixed with the limiting groove 1111, and the inlay block 1107 can be squeezed and limited with the help of the tensile force generated by the tension spring 1108. At this time, the entire muffler body 1101 is stably installed on the inner wall of the installation frame 10 for noise absorption.

[0038] Its overall working principle is that after the fan composed of the entire cooling tower body 1 is driven, the fan in the cooling tower body 1 generates negative pressure through its rotating blades 5, thereby sucking in the surrounding air. The air after heat exchange is discharged from the cooling tower by the fan, taking away the heat in the water, thereby achieving a cooling effect. When the fan is running, a high-decibel noise will be generated. At this time, auxiliary noise reduction operation can be performed with the help of the noise reduction mechanism 7 corresponding to the fan position in the cooling tower body 1. The noise reduction plate 701 is installed and fixed at the upper end of the fan using the installation frame 10 to reduce the noise of the entire fan. In this process, the entire silencer body 1101 can also be installed with the help of the silencer mechanism 11 It is equipped on the inner wall of the installation frame 10 and is located directly above the entire fan blade 5. The noise is absorbed and processed by means of the silencer body 1101. At the same time, in order to facilitate the installation and limiting of the air guide tube 2 when it is used for a long time, the moving rod 85 in the connecting frame 84 in the assembly mechanism 8 is plugged and fixed with the rotating rod 83 rotating on the surface of the fixed frame to prevent it from falling off. The entire air guide tube 2 is effectively and conveniently replaced and fixed. When the air guide tube 2 on the upper surface of the cooling tower body 1 is used, in order to adjust the direction of the entire air guide tube 2, a rotating groove is opened on the surface of the fixing seat 81 to rotate with the bottom end surface of the air guide tube 2, so as to facilitate the deflection adjustment of the position during the installation of the air guide tube 2.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A low-noise cooling tower fan, comprising a cooling tower body (1), an air guide tube (2), blades (5), a noise reduction mechanism (7) and a rotating mechanism (9), characterized in that: The air guide tube (2) is located on the upper surface of the cooling tower body (1); the upper surface of the cooling tower body (1) is fixedly connected to a mounting frame (10); a driving motor (3) is installed inside the cooling tower body (1); a reduction mechanism (4) is installed at a position corresponding to the blades (5) at the output end of the driving motor (3); the reduction mechanism (4) comprises a reduction box (48); one side of the reduction box (48) is rotatably connected to a coupling (47); one end of the coupling (47) is fixedly connected to the output end of the driving motor (3); a rotating shaft (42) and a driving shaft (43) are rotatably connected inside the reduction box (48); a plurality of blades (5) are installed at the upper end of the driving shaft (43); The arc surface of the rotating shaft (42) is fixedly connected to a first helical gear (45), the arc surface of the driving shaft (43) is fixedly connected to a second helical gear (46), the first helical gear (45) meshes with the second helical gear (46), the arc surface of the rotating shaft (42) is fixedly connected to a second spur bevel gear (44) at the upper end of the first helical gear (45), one end of the coupling (47) is fixedly connected to a first spur bevel gear (41), the tooth surfaces of the first spur bevel gear (41) and the second spur bevel gear (44) mesh, and an oil system (6) is provided on one side surface of the reduction box (48), the oil system (6) comprising an oil pipe (63), the oil pipe (63) ) is fixedly connected to one side surface of the reduction box (48); an oil mark (61) is installed at one end of the oil pipe (63) away from the reduction box (48); a vent pipe (62) is fixedly connected to the upper surface of the reduction box (48); the noise reduction mechanism (7) is arranged on the upper surface of the cooling tower body (1) and is located directly above the reduction mechanism (4) and the blades (5); the noise reduction mechanism (7) comprises four noise reduction plates (701); the four noise reduction plates (701) are evenly distributed on the inner wall of the installation frame (10); both side surfaces of the noise reduction plates (701) are plugged into the inner wall of the installation frame (10); a plurality of noise reduction holes (702) are opened on the surface of the noise reduction plates (701); 01) is a polyester fiber composite board, and the surfaces of the two noise reduction plates (701) on one side close to each other are each provided with two mounting holes (704), and the surface of the mounting frame (10) is provided with a plug hole (707) at a position corresponding to the mounting hole (704), and the surface of the mounting frame (10) is fixedly connected with a mounting shaft (705) at a position corresponding to the plug hole (707), and the surface of the mounting shaft (705) is slidably penetrated by a mounting plate (708), and the surface of the mounting plate (708) is fixedly connected with an insertion rod (709) at a position corresponding to the plug hole (707), and the surface of the insertion rod (709) is plugged into the inner wall of the mounting hole (704), and the arc surface of the mounting shaft (705) is threadedly connected with an extrusion shaft (711).

2. A low noise cooling tower fan according to claim 1, characterized in that: The arc surface of the installation shaft (705) is fixedly connected to a positioning frame (706); the cross section of the positioning frame (706) is cross-shaped; the cross-sectional dimensions of the positioning frame (706) are compatible with the cross-sectional dimensions of the installation plate (708); the arc surface of the installation shaft (705) is sleeved with a protective ring (710); the surface of the protective ring (710) is in contact with a side surface of the extrusion shaft (711).

3. A low noise cooling tower fan according to claim 1, characterized in that: A plurality of protrusions (703) are fixedly connected to the inner wall surface of the installation frame (10) near the blade (5); the plurality of protrusions (703) are evenly distributed on the surface of the installation frame (10); the cross section of one end of the insertion rod (709) near the insertion hole (707) is in a pointed cone shape; the insertion rod (709) is a hard alloy rod.

4. A low noise cooling tower fan according to claim 1, characterized in that: The inner wall of the installation frame (10) is provided with a silencer mechanism (11), the silencer mechanism (11) comprising four docking plates (1105) and a silencer body (1101), one end of the four docking plates (1105) being evenly distributed on the inner wall surface of the installation frame (10), one end of the docking plates (1105) being fixedly connected to the inner wall surface of the installation frame (10), the silencer body (1101) being located directly above the blade (5), a docking plate (1102) being fixedly connected to the position of the arc surface of the silencer body (1101) corresponding to the docking plate (1105), the surface of the docking plate (1102 being in contact with the surface of the docking plate (1105), and an inlay groove (1110) being provided on the surface of the docking plate (1102), The cross section of the inlay groove (1110) is vertical; a docking rod (1106) is fixedly connected to the surface of the docking plate (1105); an inlay block (1107) is movably connected to the arc surface of the docking rod (1106); a tension spring (1108) is sleeved on the arc surface of the docking rod (1106); two ends of the tension spring (1108) are respectively fixedly connected to the inlay block (1107) and the docking rod (1106); the docking rod (1106) and the inlay block (1107) slide through the inlay groove (1110); and limiting grooves (1111) are provided on the surface of the connection plate (1102) at positions corresponding to both sides of the inlay groove (1110); and the inner wall of the limiting groove (1111) is snap-fitted to the surface of the inlay block (1107).

5. A low noise cooling tower fan according to claim 4, characterized in that: A connecting frame (1103) is fixedly connected to the surface of the connecting plate (1102), and a hanging ring (1104) is rotatably connected to the inner wall of the connecting frame (1103).

6. A low noise cooling tower fan according to claim 4, characterized in that: Two limiting columns (1109) are fixedly connected to the surface of the docking plate (1105), and the two limiting columns (1109) are respectively located on both sides of the docking rod (1106), and the arc surface of the limiting column (1109) is slidably plugged into the inner wall of the inlay groove (1110).

7. A low noise cooling tower fan according to claim 1, characterized in that: An assembly mechanism (8) is provided on the upper surface of the installation frame (10), the assembly mechanism (8) comprising a fixed seat (81), the lower surface of the fixed seat (81) abutting against the upper surface of the installation frame (10), the circular arc surface of the fixed seat (81) being fixedly connected to a plurality of connecting frames (84), the surfaces of the plurality of connecting frames (84) being slidably penetrated by moving rods (85), the circular arc surface of the moving rod (85) being sleeved with a spring (86), the two ends of the spring (86) being fixedly connected to the moving rod (85) and the connecting frame (84) respectively, the circular arc surface of the installation frame (10) being fixedly connected to a fixed frame (82) at a position corresponding to the moving rod (85), the inner wall of the fixed frame (82) being rotatably connected to a rotating rod (83), the upper inner wall of the rotating rod (83) being plugged into the surface of the moving rod (85).

8. A low noise cooling tower fan according to claim 7, characterized in that: A pull ring (87) is rotatably connected to the surface of the movable rod (85), and the cross section of the pull ring (87) is vertical. A plurality of auxiliary rods are fixedly connected to the inner wall surface of the fixed seat (81), and the cross-sectional dimensions of the fixed seat (81) are compatible with the cross-sectional dimensions of the installation frame (10).

9. A low noise cooling tower fan according to claim 7, characterized in that: The air guide tube (2) is fixedly connected to the fixed seat (81) by means of a rotating mechanism (9). The rotating mechanism (9) comprises a rotating groove (92). The rotating groove (92) is formed on the surface of the fixed seat (81). The inner wall of the rotating groove (92) is plugged into the bottom end of the air guide tube (2). The bottom arc surface of the air guide tube (2) is fixedly connected with a plurality of connecting plates (94). The cross-sections of the plurality of connecting plates (94) are in an "L" shape. The short arm end surface of the connecting plate (94) is threadedly penetrated by an extrusion rod (95). The circular arc surface of the fixed seat (81) is formed with an extrusion groove (93). The extrusion rod (95) is rotatably connected with an extrusion block (91) at a position close to the extrusion groove (93). The surface of the extrusion block (91) is plugged into the inner wall of the extrusion groove (93).

10. A low noise cooling tower fan according to claim 9, characterized in that: One side of the extrusion block (91) is fixedly connected to a limiting rod (96), and one end surface of the limiting rod (96) slides through the short arm end surface of the connecting plate (94).

Images