A four-fan parallel installation direct drive cooling tower fan unit

Abstract

The utility model relates to a kind of four fan parallelly connected installation direct transmission's cooling tower fan unit, including cabinet, four fan assemblies and control box, the top of cabinet is provided with four installation slots, four fan assemblies are respectively detachably installed in four installation slots;Control box is set on cabinet, four sets of locking structures are provided on cabinet, four sets of locking structures are respectively corresponding with four installation slots, self-locking drive mechanism is provided on cabinet, self-locking drive mechanism is respectively matched with four sets of locking structures, the utility model, through the linkage of four installation slots, synchronous locking structure and self-locking drive mechanism of the arrangement of "T" character, the "one-key" quick disassembly of four fan assemblies is realized, once external force drives, four sets of locking mechanisms are simultaneously unlocked or locked, fan assembly is integrally fixed or released one-time, avoid the traditional mode of each bolt fastening, four fans are directly driven by permanent magnet synchronous motor, cancel the intermediate transmission of belt, gear and the like, transmission efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of fan equipment, and particularly relates to a cooling tower fan group with four fans connected in parallel and directly driven. Background Technique

[0002] Large industrial or commercial buildings generally use cooling towers to cool circulating water, and one of the core components of the cooling tower is a multi-fan parallel fan group. In recent years, in order to meet the requirements of large exhaust air volume, high redundancy and energy-saving operation, the scheme of arranging four fans in a "field" shape in parallel and directly driven by a motor has gradually become the mainstream. However, the following prominent problems have emerged in the actual manufacturing, installation and later maintenance of existing four-fan cooling towers:

[0003] Low installation efficiency. In the traditional scheme, each fan component is usually fixed to the top plate of the tower body by 4-6 groups of bolts separately. A total of 16-24 bolts need to be tightened for four fans. Moreover, restricted by factors such as narrow working space at high altitude and difficult alignment of bolt holes, installers need to repeatedly adjust and tighten each bolt one by one.

[0004] Difficult maintenance. After the equipment has been running for a period of time, the fan components need to be regularly removed for scale cleaning, bearing replacement or motor maintenance. Since the bolts are long-term exposed to humid, hot and salty environments and are extremely easy to rust, impact wrenches, rust removers or even flame cutting are often needed during disassembly, which not only increases the labor intensity but also poses a hidden danger of damaging the tower body structure. Content of the Utility Model

[0005] The purpose of the utility model is to provide a cooling tower fan group with four fans connected in parallel and directly driven to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A cooling tower fan group with four fans connected in parallel and directly driven includes a cabinet body, four fan components and a control box. Four installation slots are opened at the top of the cabinet body, and the four installation slots are distributed in a "field" shape. The four fan components are respectively detachably installed in the four installation slots;

[0008] The control box is arranged on the cabinet body, and the control box is used to control the start and stop of the four fan components;

[0009] Four groups of locking structures are arranged on the cabinet body, and the four groups of locking structures respectively correspond to the four installation slots. When the four fan components are placed in the four installation slots, the four locking structures can synchronously limit the four fan components, so that the four fan components are quickly fixed on the cabinet body;

[0010] The cabinet is equipped with a self-locking drive mechanism, which cooperates with four sets of locking structures. When the self-locking drive mechanism is driven by an external force, the four sets of locking structures will move synchronously, thereby realizing the limiting, unlocking and switching of the four fan components.

[0011] As a further embodiment of this utility model:

[0012] The fan assembly includes a fan and a permanent magnet synchronous motor, and the output end of the permanent magnet synchronous motor is coaxially and fixedly connected to the impeller of the fan.

[0013] The fan is adapted to the mounting slot. When the fan is located in the mounting slot, the mounting slot will prevent the fan from moving horizontally or downward.

[0014] As a further improvement of this utility model:

[0015] The locking structure includes inner and outer gear rings and a rotating shaft. The inner and outer gear rings are horizontally rotatably mounted on the cabinet, and the inner and outer gear rings are concentrically arranged with the mounting groove.

[0016] The rotating shafts are vertically rotatable on the cabinet. There are four rotating shafts, and the four rotating shafts are evenly distributed around the mounting groove.

[0017] As a further improvement of this utility model:

[0018] A limit rod is horizontally provided on the outer wall of the rotating shaft. The bottom of the limit rod is in contact with the top of the fan. When the rotating shaft rotates, the limit rod can be moved away from the fan.

[0019] A driven gear is coaxially mounted on the rotating shaft, and the driven gear meshes with the inner and outer gear rings.

[0020] As a further improvement of this utility model:

[0021] The self-locking drive mechanism includes a rotating column and a first bevel gear coaxially mounted on the rotating column. The rotating column is vertically rotatably mounted on the cabinet and is located at the center of the four mounting slots.

[0022] A drive gear is coaxially mounted on the rotating column, and the drive gear meshes with the driven gears in the four sets of locking structures.

[0023] As a further improvement of this utility model:

[0024] A rotating rod is horizontally rotatable on the cabinet, and a second bevel gear is coaxially mounted on one end of the rotating rod;

[0025] The second bevel gear meshes with the first bevel gear, and a third bevel gear is coaxially arranged at the other end of the rotating rod.

[0026] As a further solution of the present utility model:

[0027] The self-locking drive mechanism further includes a base arranged on the cabinet body and a drive shaft vertically and rotatably arranged on the base. A fourth bevel gear is coaxially arranged on the drive shaft, and the fourth bevel gear meshes with the third bevel gear;

[0028] A worm gear is coaxially arranged on the drive shaft, a worm meshing with the worm gear is horizontally and rotatably arranged on the base, and a hand wheel is coaxially arranged at one end of the worm.

[0029] Compared with the prior art, the beneficial effects of the present utility model are:

[0030] Through the linkage cooperation of the four installation grooves arranged in a "field" shape, the four locking structures and the self-locking drive mechanism, the synchronous and rapid disassembly and assembly of the four fan components are realized; when installation or maintenance is required, only a single external force is needed to drive the self-locking drive mechanism, and the unlocking or locking actions of the four locking structures can be completed synchronously, so as to fix or release the fan components integrally at one time, completely eliminating the cumbersome steps of screwing multiple bolts one by one in the traditional technology; this design does not require any tools and can be operated by a single person, significantly shortening the installation and maintenance time, greatly improving the assembly efficiency and operation and maintenance convenience of the cooling tower fan unit, while reducing the labor intensity and operation risk;

[0031] In addition, the four fan components are directly driven by four permanent magnet synchronous motors, eliminating the intermediate transmission, increasing the transmission efficiency. The permanent magnet synchronous motor can meet the low-speed operation and is directly connected to the fan, eliminating the belt transmission device and reducing the loss of transmission efficiency.

[0032] This application optimizes the structure, removes the traditional belt reducer transmission fixed frequency mode, and optimizes it to a permanent magnet variable frequency motor direct connection transmission. The automatic control program automatically adjusts the frequency and reduces the speed, improving the efficiency, saving energy and reducing noise. The installation is simple, plug and play, and the service life is improved. When one of them is maintained, the other fans can still work normally without affecting the normal use of the cooling tower. And the fan is modularly designed, and the packaging and transportation are very convenient, greatly saving costs, including installation material costs, maintenance costs, power consumption costs, transportation costs, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a cooling tower fan unit with four fans in parallel installation and direct drive.

[0034] Figure 2Schematic diagram of splitting of a fan assembly in an embodiment of a cooling tower fan group with four fans in parallel installation and direct drive.

[0035] Figure 3 It is Figure 2 Enlarged view at position A in

[0036] Figure 4 It is Figure 2 Enlarged view at position B in

[0037] Figure 5 Partial structural schematic diagram of an embodiment of a cooling tower fan group with four fans in parallel installation and direct drive.

[0038] In the figure: 1, cabinet; 101, installation slot; 2, control box; 3, fan; 4, permanent magnet synchronous motor; 5, internal and external gear rings; 6, rotating shaft; 7, limiting rod; 8, driven gear; 9, rotating column; 10, first bevel gear; 11, driving gear; 12, rotating rod; 13, second bevel gear; 14, third bevel gear; 15, base; 16, driving shaft; 17, fourth bevel gear; 18, worm gear; 19, worm; 20, hand wheel. Specific implementation mode

[0039] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0040] In addition, an element in the present utility model is referred to as being "fixed to" or "arranged on" another element, and it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation mode.

[0041] Please refer to Figures 1-5 , in the embodiment of the present utility model, a cooling tower fan group with four fans in parallel installation and direct drive includes a cabinet 1, four fan assemblies and a control box 2. Four installation slots 101 are opened at the top of the cabinet 1, and the four installation slots 101 are distributed in a "field" shape. The four fan assemblies are respectively detachably installed in the four installation slots 101;

[0042] The control box 2 is arranged on the cabinet 1, and the control box 2 is used to control the start and stop of the four fan assemblies;

[0043] Four locking structures are provided on the cabinet body 1, and the four locking structures respectively correspond to the four installation grooves 101. When the four fan assemblies are placed in the four installation grooves 101, the four locking structures can synchronously limit the four fan assemblies, so that the four fan assemblies are quickly fixed on the cabinet body 1;

[0044] A self-locking driving mechanism is provided on the cabinet body 1, and the self-locking driving mechanism is respectively matched with the four locking structures. When the self-locking driving mechanism is driven to operate by an external force, the four locking structures will synchronously follow the action, so as to realize the switching of limiting and unlocking of the four fan assemblies.

[0045] In this solution, the four fan assemblies are respectively placed into the four "tian" - shaped installation grooves 101 at the top of the cabinet body 1 along the vertical direction. At this time, the fan assemblies are only initially positioned by the surrounding wall surfaces of the installation grooves 101 and have not yet formed a rigid fixation;

[0046] Apply a one - time external force to the self - locking driving mechanism. This external force is converted into synchronous motion by the self - locking driving mechanism, and at the same time drives the four locking structures to act. The limiting rods 7 in each set of locking structures rotate simultaneously under the drive of the mechanism and are in contact with the top of the fan assembly; the self - locking driving mechanism can prevent the limiting rods 7 from rebounding, realizing bolt - free rigid locking;

[0047] The four fan assemblies are thus synchronously limited at one time, completing the switching from "loose placement" to "fixation", and the whole process does not require tools.

[0048] As a further solution of the present utility model, the fan assembly includes a fan 3 and a permanent magnet synchronous motor 4, and the output end of the permanent magnet synchronous motor 4 is coaxially and fixedly connected to the impeller of the fan 3;

[0049] The fan 3 is adapted to the installation groove 101. When the fan 3 is located in the installation groove 101, the installation groove 101 will prevent the fan 3 from moving horizontally and downward.

[0050] In this embodiment, when the fan assembly is placed into the installation groove 101 from top to bottom, the outer frame size of the fan 3 exactly matches the inner cavity of the installation groove 101. At this time, the fan 3 is accurately positioned in the horizontal direction by the surrounding wall surfaces of the installation groove 101 and cannot generate any lateral displacement; in the vertical direction, the bottom edge of the fan 3 directly lands on the step or stop of the installation groove 101, so as to be prevented from continuing to move downward, realizing pre - positioning and then installation;

[0051] Once the fan 3 is fully inserted into the mounting slot 101, the mounting slot 101 provides double mechanical constraint in the horizontal and downward directions. Subsequently, the locking structure (such as the self-locking drive mechanism mentioned above) further provides upward limit, so that the fan assembly is fully constrained in all six degrees of freedom of the X, Y, and Z axes, achieving a rigid fixed state.

[0052] When the control box 2 issues a start command, the permanent magnet synchronous motor 4 directly drives the impeller of the fan 3 to rotate coaxially. Because the output shaft of the permanent magnet synchronous motor 4 is rigidly connected to the impeller, there are no intermediate links such as belts and gears, resulting in the shortest power transmission path and the highest efficiency. At the same time, since the mounting slot 101 has eliminated all mechanical clearances, the fan 3 will not generate additional vibration or displacement when rotating at high speed, ensuring stable airflow output.

[0053] As a further embodiment of this utility model, the locking structure includes inner and outer gear rings 5 ​​and a rotating shaft 6. The inner and outer gear rings 5 ​​are horizontally rotatably mounted on the cabinet 1, and the inner and outer gear rings 5 ​​are concentrically mounted with the mounting groove 101.

[0054] The rotating shaft 6 is vertically rotatably mounted on the cabinet 1. There are four rotating shafts 6, and the four rotating shafts 6 are evenly distributed around the mounting groove 101.

[0055] A limiting rod 7 is horizontally provided on the outer wall of the rotating shaft 6. The bottom of the limiting rod 7 is in contact with the top of the fan 3. When the rotating shaft 6 rotates, the limiting rod 7 can be moved away from the fan 3.

[0056] A driven gear 8 is coaxially mounted on the rotating shaft 6, and the driven gear 8 meshes with the inner and outer gear rings 5.

[0057] In this embodiment, when the inner and outer gear rings 5 ​​rotate, the inner and outer gear rings 5 ​​drive all the driven gears 8 meshing with them to rotate synchronously. Since four rotating shafts 6 are evenly distributed around the mounting groove 101, the four driven gears 8 simultaneously obtain the same rotation in the same direction and at the same angle.

[0058] Each shaft 6 is coaxially fixed with the corresponding driven gear 8. Therefore, the shaft 6 rotates around its own vertical axis under the drive of the gear.

[0059] The limiting rod 7, fixed to the outer wall of the rotating shaft 6, swings synchronously with the shaft.

[0060] Locking position: The limit rod 7 extends horizontally to the top of the fan 3, with its bottom surface touching the top surface of the fan 3, preventing the fan 3 from moving upward; at this time, the fan 3 is constrained by the mounting groove 101 in the horizontal direction and pressed by the limit rod 7 in the vertical direction, achieving complete fixation of six degrees of freedom;

[0061] Unlock position: When the gear ring continues to rotate at a certain angle, the limit rod 7 swings away from the top of the fan 3, completely clearing the vertical channel, and the fan 3 can be taken out upwards;

[0062] By controlling the rotation direction and angle of the inner and outer gear rings 5, the four limit rods 7 can be simultaneously entered or exited from the locking area, completing the instantaneous switching of "one-click four rods" locking and unlocking.

[0063] As a further embodiment of this utility model, the self-locking drive mechanism includes a rotating column 9 and a first bevel gear 10 coaxially disposed on the rotating column 9. The rotating column 9 is vertically rotatably disposed on the cabinet 1, and the rotating column 9 is located at the center of the four mounting slots 101.

[0064] A drive gear 11 is coaxially arranged on the rotating column 9, and the drive gear 11 meshes with the driven gears 8 in the four sets of the locking structure.

[0065] A rotating rod 12 is horizontally rotatable on the cabinet 1, and a second bevel gear 13 is coaxially mounted on one end of the rotating rod 12;

[0066] The second bevel gear 13 meshes with the first bevel gear 10, and the other end of the rotating rod 12 is coaxially provided with the third bevel gear 14.

[0067] The self-locking drive mechanism also includes a base 15 disposed on the cabinet 1 and a drive shaft 16 vertically rotatably disposed on the base 15. A fourth bevel gear 17 is coaxially disposed on the drive shaft 16, and the fourth bevel gear 17 meshes with the third bevel gear 14.

[0068] A worm gear 18 is coaxially mounted on the drive shaft 16, and a worm 19 that meshes with the worm gear 18 is horizontally rotatably mounted on the base 15. A handwheel 20 is coaxially mounted on one end of the worm 19.

[0069] In this embodiment, the operator drives the worm 19 to rotate via the handwheel 20, and the worm wheel 18, which meshes with the worm 19, will rotate accordingly. Since the worm wheel 18 and the worm 19 have self-locking characteristics, they can only be driven by the handwheel 20 applying force. After the machine stops, any reverse torque is locked by the worm 19 to prevent the locking structure from springing back.

[0070] The worm gear 18 is coaxially fixed with the drive shaft 16. The high speed and low torque of the worm 19 are converted into the low speed and high torque of the drive shaft 16, ensuring that the operation is effortless and the action is smooth.

[0071] The drive shaft 16 drives the fourth bevel gear 17 to rotate. The fourth bevel gear 17 meshes with the third bevel gear 14, changing the vertical rotation into a horizontal rotation. The rotating rod 12 rotates horizontally synchronously with the third bevel gear 14.

[0072] The other end of the rotating rod 12 is fixed with the second bevel gear 13, which meshes with the first bevel gear 10, and the horizontal rotation is changed to vertical rotation again, so that the rotating column 9 obtains vertical rotation power.

[0073] The rotating column 9 is located at the center of the four mounting slots 101. The driving gear 11 on it meshes with the driven gears 8 of the four locking structures at the same time. Every time the rotating column 9 rotates through an angle, the four driven gears 8 rotate through the same angle synchronously, realizing the mechanical synchronization of "one rotation of four columns".

[0074] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A four-fan parallel installation direct drive cooling tower fan unit, comprising a cabinet body (1), four fan assemblies and a control box (2), characterized in that, Four mounting grooves (101) are provided at the top of the cabinet body (1), and the four mounting grooves (101) are distributed in a "field" shape. The four fan assemblies are respectively detachably mounted in the four mounting grooves (101); The control box (2) is arranged on the cabinet body (1), and the control box (2) is used to control the start and stop of the four fan assemblies; Four groups of locking structures are arranged on the cabinet body (1), and the four groups of locking structures respectively correspond to the four mounting grooves (101). When the four fan assemblies are placed in the four mounting grooves (101), the four locking structures can synchronously limit the four fan assemblies, so that the four fan assemblies are quickly fixed on the cabinet body (1); A self-locking driving mechanism is arranged on the cabinet body (1), and the self-locking driving mechanism is respectively matched with the four groups of locking structures. When the self-locking driving mechanism is driven to operate by an external force, the four groups of locking structures will synchronously follow the action, so as to realize the switching of limiting and unlocking of the four fan assemblies.

2. A four fan parallel mounted direct drive cooling tower fan assembly as claimed in claim 1 wherein, The fan assembly includes a fan (3) and a permanent magnet synchronous motor (4), and the output end of the permanent magnet synchronous motor (4) is coaxially and fixedly connected to the impeller of the fan (3); The fan (3) is adapted to the mounting groove (101). When the fan (3) is located in the mounting groove (101), the mounting groove (101) will prevent the fan (3) from moving horizontally and downward.

3. A cooling tower fan unit with four fans installed in parallel and directly driven, as described in claim 2, is characterized in that... The locking structure includes an internal and external gear ring (5) and a rotating shaft (6). The internal and external gear ring (5) is horizontally rotatably arranged on the cabinet body (1), and the internal and external gear ring (5) is concentrically arranged with the mounting groove (101); The rotating shaft (6) is vertically rotatably arranged on the cabinet body (1). There are four rotating shafts (6), and the four rotating shafts (6) are evenly distributed around the mounting groove (101).

4. A four fan parallel mounted direct drive cooling tower fan assembly according to claim 3, wherein, A limiting rod (7) is horizontally arranged on the outer wall of the rotating shaft (6), and the bottom of the limiting rod (7) is in contact with the top of the fan (3). When the rotating shaft (6) rotates, the limiting rod (7) can move away from the fan (3); A driven gear (8) is coaxially arranged on the rotating shaft (6), and the driven gear (8) meshes with the internal and external gear ring (5).

5. A four fan parallel mounted direct drive cooling tower fan assembly as claimed in claim 4 wherein, The self-locking driving mechanism includes a rotating column (9) and a first bevel gear (10) coaxially arranged on the rotating column (9). The rotating column (9) is vertically rotatably arranged on the cabinet body (1), and the rotating column (9) is located at the center of the four mounting grooves (101); A driving gear (11) is coaxially arranged on the rotating column (9), and the driving gear (11) meshes with the driven gears (8) in the four groups of locking structures at the same time.

6. A four fan parallel mounted direct drive cooling tower fan assembly as claimed in claim 5 wherein, A rotating rod (12) is horizontally rotatably arranged on the cabinet body (1), and a second bevel gear (13) is coaxially arranged at one end of the rotating rod (12); The second bevel gear (13) meshes with the first bevel gear (10), and a third bevel gear (14) is coaxially arranged at the other end of the rotating rod (12).

7. A cooling tower fan unit with four fans installed in parallel and directly driven, as described in claim 6, is characterized in that, The self-locking drive mechanism also includes a base (15) disposed on the cabinet (1) and a drive shaft (16) vertically rotatably disposed on the base (15). A fourth bevel gear (17) is coaxially disposed on the drive shaft (16), and the fourth bevel gear (17) meshes with the third bevel gear (14). A worm gear (18) is coaxially mounted on the drive shaft (16), and a worm (19) that meshes with the worm gear (18) is horizontally mounted on the base (15). A handwheel (20) is coaxially mounted on one end of the worm (19).

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