Cooling tower fan drive shaft locking device

Abstract

This utility model provides a locking device for the drive shaft of a cooling tower fan, relating to the field of cooling tower fan technology. The device includes a lifting platform, with a left locking mechanism and a right locking mechanism symmetrically arranged above the platform. Both mechanisms include motors, positioned above the lifting platform. A screw is fixedly mounted at the motor's output end, and a telescopic sleeve is threaded onto the outer side of the screw. The telescopic sleeve has a hollow internal structure, with two limiting rings evenly fixed at its bottom. A guide post is positioned above the lifting platform below the telescopic sleeve, with the limiting rings sliding on the guide post. A locking gripper is located at the end of the telescopic sleeve. When the fan stops, the locking gripper approaches and clamps the fan drive shaft, preventing rotation and avoiding unnecessary wear on bearings and other components. This avoids damage to the motor's internal components, extends the equipment's service life, and reduces maintenance costs.

Description

Technical Field

[0007]

[0001] The utility model relates to the technical field of cooling tower fans, in particular to a locking device for the transmission shaft of a cooling tower fan. Background Art

[0002] In large chemical production plants, cooling towers are very important equipment. The main function of a cooling tower is to dissipate the heat in the hot water or hot fluid generated during the production process into the atmosphere through a heat exchange process, so that these fluids can be cooled and recycled.

[0003] The cooling tower fan system is one of the important components of a cooling tower. The existing cooling tower fan system includes a motor. The motor drives a reducer to rotate through a transmission shaft, and then drives the fan blades to rotate, sucking cold air from the air inlet at the bottom of the tower into the tower and performing convective heat transfer with the circulating water in the tower.

[0004] When the fan stops operating, the airflow in the cooling tower will cause the fan to rotate idly or reverse. When the fan rotates, the current and torque in the motor winding will fluctuate, which will further加剧 the internal mechanical wear of the motor, affect the service life of the equipment, and at the same time cause unnecessary wear on components such as bearings. In the long run, it may cause bearing damage, increasing the equipment maintenance cost and the cost of replacing components. Summary of the Utility Model

[0005] To solve the above problems, the utility model provides a locking device for the transmission shaft of a cooling tower fan, which includes a lifting platform (1) with a freely adjustable height. A left locking mechanism and a right locking mechanism are symmetrically arranged above the lifting platform (1), and the left locking mechanism and the right locking mechanism are arranged opposite to each other. Both the left locking mechanism and the right locking mechanism include a motor (4). The motor (4) is arranged above the lifting platform (1). A cushion block (3) is arranged between the motor (4) and the lifting platform (1). A screw rod (5) is fixedly arranged at the output end of the motor (4). A telescopic sleeve (6) is threadedly connected to the outer side of the screw rod (5). The telescopic sleeve (6) is a hollow structure inside. Two limiting rings (601) are evenly and fixedly arranged at the bottom of the telescopic sleeve (6). A guiding column (8) is arranged above the lifting platform (1) and below the telescopic sleeve (6). The limiting ring (601) is sleeved on the guiding column (8), and the limiting ring (601) can slide on the guiding column (8). A locking gripper (7) is arranged at the end of the telescopic sleeve (6).

[0006] Optionally, the locking gripper (7) is integrally in a "U" - shaped structure, and an anti - slip rubber pad is arranged inside the locking gripper (7).

[0007] Optionally, the lifting platform (1) includes a support plate (101), and lifting rods (102) are arranged around the bottom of the support plate (101). The bottom of the lifting rods (102) is arranged inside the lifting cylinder (104). The lifting cylinder (104) has an internal hollow structure. The lifting rods (102) can slide up and down along the lifting cylinder (104). The outer side of the lifting rods (102) is provided with external threads. An adjusting ring (103) is threaded to the outer side of the lifting rods (102). The adjusting ring (103) is arranged above the lifting cylinder (104). The cross-sectional area of ​​the adjusting ring (103) is larger than the cross-sectional area of ​​the lifting cylinder (104).

[0008] Optionally, the outer side of the adjusting ring (103) is provided with anti-slip texture.

[0009] Optionally, the surface of the lifting cylinder (104) is provided with an observation port (105), and a scale (106) is provided on one side of the observation port (105).

[0010] Optionally, the bottom of the lifting cylinder (104) is provided with casters (2).

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. When the cooling tower fan stops, the two motors on the left and right start, driving the telescopic sleeves on both sides to move towards the center simultaneously. The locking grippers at the ends of the telescopic sleeves approach and clamp the fan drive shaft, preventing it from rotating. This prevents unnecessary wear on bearings and other components, avoids damage to the motor's internal components, extends the service life of the equipment, and reduces maintenance costs.

[0013] 2. The height of the lifting platform of this utility model can be adjusted by adjusting the adjusting ring, making it suitable for cooling tower fan drive shafts at different heights, with a wide range of applications; an observation port is provided inside the lifting cylinder, and a scale is provided on one side of the observation port. By cooperating with the observation port and the scale, the height of the support plate can be easily adjusted, so that the four top corners of the support plate are at the same height, ensuring the level of the motor and reducing the difficulty of adjustment. Attached Figure Description

[0014] The following description, with reference to the accompanying drawings, illustrates an embodiment of a cooling tower fan drive shaft locking device according to the present invention. The accompanying drawings are as follows:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure label:

[0017] 1. Lifting platform; 101. Support plate; 102. Lifting rod; 103. Adjusting ring; 104. Lifting cylinder; 105. Observation port; 106. Scale; 2. Casters; 3. Pads; 4. Motor; 5. Screw; 6. Telescopic sleeve; 601. Limit ring; 7. Locking gripper; 8. Guide column. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that if there are directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model, they are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0020] Furthermore, if the descriptions in this utility model involve terms such as "first" or "second," they are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments:

[0022] Reference Figure 1, A locking device for the drive shaft of a cooling tower fan, which includes a lifting platform 1 with freely adjustable height. Above the lifting platform 1, a left locking mechanism and a right locking mechanism are symmetrically arranged, and the left locking mechanism and the right locking mechanism are arranged opposite to each other. Both the left locking mechanism and the right locking mechanism include a motor 4. The motor 4 is arranged above the lifting platform 1, and a cushion block 3 is arranged between the motor 4 and the lifting platform 1. A screw rod 5 is fixedly arranged at the output end of the motor 4. A telescopic sleeve 6 is threadedly connected to the outside of the screw rod 5. The telescopic sleeve 6 is a hollow structure inside. Two limiting rings 601 are evenly and fixedly arranged at the bottom of the telescopic sleeve 6. Above the lifting platform 1 and below the telescopic sleeve 6, a guiding column 8 is arranged. The limiting rings 601 are sleeved on the guiding column 8, and the limiting rings 601 can slide on the guiding column 8. A locking gripper 7 is arranged at the end of the telescopic sleeve 6.

[0023] The locking gripper 7 is integrally of a "U" - shaped structure. An anti - slip rubber pad is arranged inside the locking gripper 7. The locking gripper 7 can clamp the drive shaft of the fan under the drive of the telescopic sleeve 6, preventing the fan blades in the cooling tower from idling or rotating in reverse due to the airflow in the cooling tower when the fan stops, thus damaging the equipment. The anti - slip rubber pad can increase the friction between the locking gripper 7 and the drive shaft, further strengthening the effect of clamping the drive shaft of the fan.

[0024] The cushion block 3 between the motor 4 and the lifting platform 1 can raise the horizontal height of the motor 4, facilitating the installation of the guiding column 8 below the telescopic sleeve 6 and making the overall layout reasonable.

[0025] The lifting platform 1 includes a support plate 101. Lift rods 102 are arranged around the bottom of the support plate 101. The bottom of the lift rod 102 is arranged inside a lift cylinder 104. The lift cylinder 104 is a hollow structure inside. The lift rod 102 can slide up and down along the lift cylinder 104. External threads are arranged on the outside of the lift rod 102. An adjusting ring 103 is threadedly connected to the outside of the lift rod 102. The adjusting ring 103 is arranged above the lift cylinder 104. The cross - sectional area of the adjusting ring 103 is larger than the cross - sectional area of the lift cylinder 104. By rotating the adjusting ring 103, the height of the bottom of the lift rod 102 inside the lift cylinder 104 can be adjusted, and then the horizontal height of the support plate 101 can be adjusted, enabling the support plate 101 to be suitable for the drive shafts of cooling tower fans at different heights.

[0026] Anti - slip lines are arranged on the outside of the adjusting ring 103. The anti - slip lines can increase the friction of the adjusting ring 103, facilitating the staff to rotate the adjusting ring 103.

[0027] An observation port 105 is opened on the surface of the lift cylinder 104. A scale 106 is arranged on one side of the observation port 105. By observing the reading of the scale 106 where the bottom of the lift rod 102 is located through the observation port 105, the readings of the four lift rods 102 are adjusted to be the same, making the four top corners of the support plate 101 at the same height. The adjustment process is convenient and fast, ensuring the horizontality of the motor 4 and reducing the adjustment difficulty.

[0028] The bottom of the lifting cylinder 104 is equipped with casters 2, which makes it convenient for staff to push the locking device to the vicinity of the cooling tower fan system.

[0029] The working principle of this utility model:

[0030] In use, the operator pushes the locking device below the fan drive shaft, rotates the adjusting ring 103, and adjusts the horizontal height of the top of the lifting rod 102 so that the locking gripper 7 is aligned with the fan drive shaft. When the fan stops, the motor 4 is started, and the motor 4 drives the screw 5 to rotate, causing the telescopic sleeve 6 on the screw 5 to move towards the fan drive shaft. When the locking gripper 7 is attached to and clamps the fan drive shaft, the motor 4 stops running. At this time, the fan drive shaft is clamped by the locking device and cannot rotate, preventing unnecessary wear on bearings and other parts, avoiding damage to the inside of the motor 4, extending the service life of the equipment, and reducing maintenance costs.

[0031] When the cooling tower fan needs to be started, the operator starts motor 4 and controls the locking handle 7 to move away from the fan drive shaft. The fan drive shaft is no longer restricted, and the fan motor 4 controls the fan to rotate, driving the cooling tower to work normally.

[0032] The present invention has thus far described the technical solution of the present invention with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A cooling tower fan drive shaft locking device, characterized by, It includes a lifting platform (1) with a freely adjustable height. A left locking mechanism and a right locking mechanism are symmetrically arranged above the lifting platform (1), and the left locking mechanism and the right locking mechanism are arranged opposite to each other. Both the left locking mechanism and the right locking mechanism include a motor (4). The motor (4) is arranged above the lifting platform (1). A cushion block (3) is arranged between the motor (4) and the lifting platform (1). A screw rod (5) is fixedly arranged at the output end of the motor (4). A telescopic sleeve (6) is threadedly connected to the outside of the screw rod (5). The telescopic sleeve (6) is a hollow structure inside. Two limiting rings (601) are evenly and fixedly arranged at the bottom of the telescopic sleeve (6). A guiding column (8) is arranged below the telescopic sleeve (6) above the lifting platform (1). The limiting ring (601) is sleeved on the guiding column (8), and the limiting ring (601) can slide on the guiding column (8). A locking gripper (7) is arranged at the end of the telescopic sleeve (6).

2. A cooling tower fan drive shaft locking device according to claim 1, wherein The locking gripper (7) is of an overall "C" - shaped structure, and an anti - slip rubber pad is arranged inside the locking gripper (7).

3. A cooling tower fan drive shaft locking device according to claim 1, wherein The lifting platform (1) includes a support plate (101). Lifting rods (102) are arranged around the bottom of the support plate (101). The bottom of the lifting rod (102) is arranged inside a lifting cylinder (104). The lifting cylinder (104) is a hollow structure inside. The lifting rod (102) can slide up and down along the lifting cylinder (104). External threads are arranged on the outside of the lifting rod (102). An adjusting ring (103) is threadedly connected to the outside of the lifting rod (102). The adjusting ring (103) is arranged above the lifting cylinder (104). The cross - sectional area of the adjusting ring (103) is larger than the cross - sectional area of the lifting cylinder (104).

4. A cooling tower fan drive shaft locking device according to claim 3, wherein Anti - slip threads are arranged on the outside of the adjusting ring (103).

5. A cooling tower fan drive shaft locking device according to claim 3, wherein An observation port (105) is opened on the surface of the lifting cylinder (104), and a scale (106) is arranged on one side of the observation port (105).

6. A cooling tower fan drive shaft locking device according to claim 3, wherein Universal wheels (2) are arranged at the bottom of the lifting cylinder (104).

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