Sealing strengthening structure of speed reducer special for cooling tower fan

Abstract

The utility model relates to the technical field of speed reducers for cooling tower fans, and particularly discloses a special speed reducer sealing strengthening structure for a cooling tower fan, which comprises a speed reducer body, a power output shaft and a shaft lubricating mechanism, and the power output shaft is inserted into a mounting hole in the speed reducer body. The shaft lubricating mechanism is arranged inside the speed reducer body, the water vapor isolation assembly is arranged outside the speed reducer body, the water vapor isolation assembly comprises the rotating framework, the outer sealing gasket and the inner sealing gasket, the rotating framework is installed on the power output shaft, and the inner sealing gasket is installed on the rotating framework. The rotating framework abuts against the outer wall of the outer sealing gasket and the outer wall of the inner sealing gasket in the process of rotating along with the power output shaft, a large amount of moisture can be prevented from passing through, the moisture is blocked for the first time, and even if part of moisture enters the isolation cavity through a gap caused by rotating extrusion of the rotating framework, the moisture can be mixed with sealing oil in the isolation cavity; and moisture is secondarily blocked, so that water vapor is prevented from being in contact with lubricating oil in the shaft lubricating mechanism.

Description

Technical Field

[0001] The utility model belongs to the technical field of speed reducers for cooling tower fans, and in particular relates to a sealing reinforcement structure of a speed reducer specially used for cooling tower fans. Background Art

[0002] The cooling tower fan reducer is a mechanical device designed specifically for cooling towers. It is used to control the speed of the fan, thereby adjusting the cooling capacity of the cooling tower. Cooling towers are divided into many categories according to the ventilation method. One of them is a cross-flow cooling tower, in which water flows vertically from the top of the tower, and air flows horizontally through the water-sprayed filler. This orthogonal airflow and water flow enable heat to be effectively transferred. The wind direction generated when the fan is started is orthogonal to the water flow. However, the entire channel for wind flow is affected by the water flow, and the entire channel is relatively humid. The reducer connected to the fan is also affected by the moisture at its location.

[0003] A lubrication mechanism is typically installed at the output shaft of a speed reducer to reduce friction. This mechanism typically lubricates the output shaft with lubricating oil. However, if excessive moisture near the speed reducer comes into direct contact with the lubricating oil without being blocked, it can accelerate the oxidation of the lubricating oil, significantly shortening its service life. Therefore, this application proposes a sealing enhancement structure for a speed reducer specifically designed for cooling tower fans. This seals the connection between the speed reducer and the output shaft, preventing moisture from entering through this location and coming into contact with the lubricating oil in the speed reducer's internal lubrication mechanism. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing enhancement structure for a speed reducer specially used for a cooling tower fan, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a cooling tower fan dedicated reducer sealing enhancement structure, comprising a reducer body, a power output shaft, and a shaft lubrication mechanism, wherein the power output shaft is inserted into a mounting hole in the reducer body, a sealing assembly is installed in the mounting hole in the reducer body, and a water vapor isolation assembly is provided on the side of the sealing assembly away from the shaft lubrication mechanism;

[0006] The water vapor isolation assembly includes an isolation base, which is sleeved on the outside of the power output shaft, and the center lines of the isolation base and the power output shaft coincide with each other. The part of the power output shaft inserted into the isolation base is equipped with a rotating skeleton, and the left and right ends of the rotating skeleton are inserted into two sets of outer sealing gaskets and inner sealing gaskets.

[0007] After the rotating skeleton is inserted into the outer sealing gasket and the inner sealing gasket, it and the inner conical plate together surround an isolation cavity, and the isolation cavity is filled with sealing oil, which forms an oil layer for isolating moisture.

[0008] Preferably, the sealing assembly includes an inner sealing seat and an outer sealing seat. The inner sealing seat is interference-fitted on the outer side of the power output shaft. A sealing ring with a circular cross-section is provided at the middle position of the inner sealing seat. When the inner sealing seat is connected to the outer sealing seat, the sealing ring is inserted into the arc groove in the outer sealing seat, and the outer sealing seat is installed on the inner wall of the channel of the mounting hole.

[0009] Preferably, the rotating skeleton includes an intermediate ring and two tapered rings. The two tapered rings are smoothly mounted on both sides of the intermediate ring, and the tapered rings are inclined toward a side away from the center line of the power output shaft.

[0010] Preferably, the side of the conical ring that fits the outer sealing gasket is inclined surface 1, and a plurality of outer sealing rods are installed on inclined surface 1. The diameters of the outer sealing rods are different. The farther away from the transfer chamber, the larger the diameter of the outer sealing rod.

[0011] Preferably, the side of the conical ring that fits the inner sealing gasket is inclined surface 2, and a plurality of inner sealing rods are installed on inclined surface 2. The diameters of the inner sealing rods are also different. The farther the inner sealing rod is from the isolation cavity, the larger its diameter.

[0012] Preferably, an oil extraction pipe is inserted into the bottom of the isolation chamber, and the other end of the oil extraction pipe is connected to the oil extraction assembly. The oil extraction assembly is used to extract the sealing oil mixed with moisture from the isolation chamber. An oil inlet pipe is also inserted into the isolation chamber, and the oil inlet pipe is connected to the oil inlet assembly. The oil inlet assembly is used to pass new sealing oil into the empty isolation chamber.

[0013] Preferably, the left and right ends of the rotating skeleton are respectively inserted into two symmetrically distributed outer sealing gaskets, and the two outer sealing gaskets are respectively installed on the inner wall of the isolation base through two external clamping rings. The inner wall of the rotating skeleton fits the two symmetrically distributed inner sealing gaskets, and the two inner sealing gaskets are installed on the two end faces of the inner conical plate. Each set of outer sealing gaskets and inner sealing gaskets includes an outer sealing gasket and an inner sealing gasket.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model arranges the shaft lubrication mechanism inside the reducer body, and arranges a water vapor isolation component outside the reducer body. The water vapor isolation component includes a rotating skeleton, an outer sealing gasket, and an inner sealing gasket. The rotating skeleton is installed on the power output shaft. When it rotates with the power output shaft, it presses against the outer walls of the outer sealing gasket and the inner sealing gasket, which can prevent a large amount of moisture from passing through and perform the first block on the moisture. Even if some moisture enters the isolation cavity through the gap caused by the rotation and extrusion of the rotating skeleton, the moisture will mix with the sealing oil inside it, and the sealing oil will perform a second block on the moisture. Through multiple interceptions, the water vapor is prevented from contacting the lubricating oil in the shaft lubrication mechanism.

[0016] 2. The utility model is provided with an outer sealing gasket and an inner sealing gasket on the outer side and the inner side of the rotating skeleton respectively, and a transfer chamber is provided between the outer sealing gasket and the inner sealing gasket. The moisture in the external air needs to first enter the transfer chamber through the gap 1 generated during the rotation of the rotating skeleton and the outer sealing gasket, and then enter the isolation chamber through the gap 2 generated by the rotation between the rotating skeleton and the inner sealing gasket. The speed and amount of moisture entering the isolation chamber are greatly reduced, and the interception effect is better.

[0017] 3. The utility model installs an oil extraction pipe and an oil extraction assembly in the isolation chamber, which can extract the sealing oil mixed with moisture in the isolation chamber, and send the sealing oil into the evacuated isolation chamber through the oil inlet pipe and the oil inlet assembly, which can maintain high-efficiency moisture interception for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the sealing enhancement structure of the speed reducer specially designed for cooling tower fans in the utility model.

[0019] Figure 2 This is one of the structural schematic diagrams of the water vapor isolation component in the present invention.

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at point A.

[0021] Figure 4 It is a structural diagram of the rotating skeleton, outer sealing gasket and inner sealing gasket in the utility model.

[0022] Figure 5 This is the second structural diagram of the water vapor isolation component in the present invention.

[0023] Figure 6 For this utility model Figure 5 Schematic diagram of the structure at point B.

[0024] In the figure: 1. Reducer body; 2. Power output shaft; 3. Shaft lubrication mechanism; 4. Sealing assembly; 401. Inner sealing seat; 402. Outer sealing seat; 403. Sealing ring;

[0025] 5. Water vapor isolation assembly; 501. Isolation base; 502. Rotating skeleton; 503. External sealing gasket; 504. Internal sealing gasket; 505. External clamping ring; 506. Internal conical plate; 507. Internal sealing rod; 508. External sealing rod; 509. Isolation chamber; 510. Oil extraction pipe; 511. Oil inlet pipe; 512. Oil extraction assembly; 513. Oil inlet assembly; 514. Transfer chamber. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figures 1-6 , a cooling tower fan dedicated reducer sealing enhancement structure, including a reducer body 1, a power output shaft 2, and a shaft lubricating mechanism 3. The power output shaft 2 is inserted into the mounting hole in the reducer body 1. The shaft lubricating mechanism 3 is used to lubricate the area of ​​relative friction between the power output shaft 2 and the reducer body 1, reducing the friction in this area, thereby achieving the purpose of protecting the power output shaft 2. A sealing component 4 is installed in the mounting hole in the reducer body 1. A water vapor isolation component 5 is provided on the side of the sealing component 4 away from the shaft lubricating mechanism 3. The sealing component 4 serves the purpose of sealing the connection position between the mounting hole and the power output shaft 2. It should be noted that the sealing component 4 includes an inner sealing seat 401 and an outer sealing seat 402. The inner sealing seat 401 is interference-fitted on the outer side of the power output shaft 2. A sealing ring 403 with a circular cross-section is clamped at the middle position of the inner sealing seat 401. When the inner sealing seat 401 and the outer sealing seat 402 are connected, the sealing ring 403 is clamped in the arc groove in the outer sealing seat 402, and the outer sealing seat 402 is installed on the inner wall of the channel of the mounting hole;

[0028] The cooling tower fan reducer is a mechanical device specially designed for cooling towers. It is used to control the speed of the fan, thereby adjusting the cooling capacity of the cooling tower. Cooling towers are divided into many categories according to the ventilation method, one of which is a cross-flow cooling tower. Its water flow falls vertically from the top of the tower, and the air flows horizontally through the water filling. This orthogonal air flow and water flow enable effective heat transfer. The wind direction generated when the fan is started is orthogonal to the water flow. However, the entire channel of the wind flow is affected by the water flow, and the entire channel is humid. The reducer body 1 connected to the fan is also affected by moisture. Moisture can easily pass through the connection between the power output shaft 2 and the reducer body 1 shell and enter the shaft lubrication mechanism 3 inside the reducer body 1. The moisture in the moisture mixes with the lubricating oil in the shaft lubrication mechanism 3, which will cause the freezing point temperature of the lubricating oil to decrease and accelerate the oxidation rate of the lubricating oil. The decrease in freezing point temperature will cause the power output shaft 2 to be unable to operate normally in a low temperature environment, and the accelerated oxidation rate of the lubricating oil will reduce the service life of the lubricating oil.

[0029] In order to solve the above problems, a water vapor isolation component 5 is provided to seal and isolate the connection position between the power output shaft 2 and the reducer body 1. The water vapor isolation component 5 isolates the water-doped gas from the space inside the reducer body 1 to prevent the water-doped gas (also referred to as moisture) from contacting the shaft lubrication mechanism 3. The water vapor isolation component 5 includes an isolation base 501, which is sleeved on the outside of the power output shaft 2, and the center lines of the two coincide. The part of the power output shaft 2 inserted into the isolation base 501 is equipped with a rotating skeleton 502. The left and right ends of the rotating skeleton 502 are respectively inserted into two symmetrically distributed outer sealing gaskets 503. The two outer sealing gaskets 503 are respectively installed on the inner wall of the isolation base 501 through two outer clamping rings 505. The inner wall of the rotating skeleton 502 is fitted with two symmetrically distributed inner sealing gaskets 504. The two inner sealing gaskets 504 are installed on the two end faces of the inner conical plate 506.

[0030] It should be noted that after the rotating skeleton 502 is inserted into the outer sealing gasket 503 and the inner sealing gasket 504, it and the inner conical plate 506 together surround an isolation chamber 509. The isolation chamber 509 is filled with sealing oil. The sealing oil forms an oil layer for isolating moisture. During the use of the reducer, moisture at the cooling tower reaches the vicinity of the power output shaft 2. During the rotation of the rotating skeleton 502 on the power output shaft 2, the outer sealing gasket 503 is squeezed, forming a small gap between the two. Moisture passes through the gap and enters the transfer chamber 509. 14 inside, then, the moisture passes through the small gap (i.e., gap 2) generated between the rotating skeleton 502 and the inner sealing gasket 504 during the rotation and extrusion process, enters the isolation chamber 509, and mixes with the sealing oil inside the isolation chamber 509. The moisture and the sealing oil are sealed together in the isolation chamber 509, and the entire water vapor isolation component 5 is arranged on the outside of the reducer body 1 shell, outside the connection position between the power output shaft 2 and the mounting hole in the reducer body 1, so as to seal and isolate the moisture and prevent moisture from entering the reducer body 1;

[0031] An outer sealing gasket 503 and an inner sealing gasket 504 are respectively provided on the outer side and the inner side of the rotating skeleton 502. External moisture first enters the transfer chamber 514 through the gap 1 generated during the rotation of the rotating skeleton 502 and the outer sealing gasket 503, and then enters the isolation chamber 509 through the gap 2 generated by the rotation between the rotating skeleton 502 and the inner sealing gasket 504. The provision of the transfer chamber 514 divides the process of moisture entering the isolation chamber 509 into two parts, which can minimize the outflow of sealing oil from the isolation chamber 509 and reduce the speed and amount of moisture entering the isolation chamber 509, allowing the sealing oil to work longer.

[0032] Further, such as Figure 3 、 4As shown, the rotating skeleton 502 includes an intermediate ring and two conical rings. The two conical rings are smoothly installed on both sides of the intermediate ring. The conical ring is inclined to the side away from the center line of the power output shaft 2. The side of the conical ring that fits with the outer sealing gasket 503 is the inclined surface 1, and a plurality of outer sealing rods 508 are installed on the inclined surface 1. It should be noted that the diameters of the multiple outer sealing rods 508 are different. The farther the position is from the transfer chamber 514, the larger the diameter of the outer sealing rod 508. The side of the conical ring that fits with the inner sealing gasket 504 is the inclined surface 2, and a plurality of inner sealing rods 508 are installed on the inclined surface 2. The diameters of the rod 507 and the inner sealing rod 507 are also different. The farther the inner sealing rod 507 is from the isolation chamber 509, the larger its diameter is. The larger the diameter is, the larger the gap squeezed out by the outer sealing gasket 503 or the inner sealing gasket 504 will be when it rotates with the rotating skeleton 502. For example, the closer the outer sealing rod 508 is to the transfer chamber 514, the smaller the gap will be. This will make it easier for external moisture to enter, while it will be more difficult for the internal sealing oil to escape. Similarly, with the arrangement of the inner sealing rod 507, it is easier for moisture to enter the isolation chamber 509 than for the sealing oil to escape.

[0033] Furthermore, after moisture enters the isolation chamber 509, it mixes with the sealing oil, and the oil layer structure formed by the sealing oil is destroyed. Therefore, after a certain amount of moisture enters, the sealing effect of the oil layer formed by the sealing oil decreases. In order to solve the above problem, an oil extraction pipe 510 is inserted into the bottom of the isolation chamber 509, and the other end of the oil extraction pipe 510 is connected to the oil extraction assembly 512. The oil extraction assembly 512 is used to extract the sealing oil mixed with moisture from the isolation chamber 509. An oil inlet pipe 511 is also inserted into the isolation chamber 509. It should be noted that the end of the oil inlet pipe 511 does not need to be inserted to the bottom of the isolation chamber 509. There is a certain height difference between it and the pipe mouth of the oil extraction pipe 510. The oil inlet pipe 511 is connected to the oil inlet assembly 513. The oil inlet assembly 513 is used to pass new sealing oil into the empty isolation chamber 509.

[0034] Working principle:

[0035] The water vapor isolation component 5 is set at the connection position between the power output shaft 2 and the shell of the reducer body 1. If external moisture wants to enter the reducer body 1, it needs to pass through the water vapor isolation component 5 first;

[0036] The interior of the water vapor isolation component 5 forms a floating sealing structure through the rotating skeleton 502, the outer sealing gasket 503, the inner sealing gasket 504, the outer clamping ring 505, and the inner conical plate 506. During the rotation of the rotating skeleton 502, it always rests on the outer walls of the outer sealing gasket 503 and the inner sealing gasket 504 to prevent a large amount of moisture from passing through, and performs the first blocking. Even if some moisture passes through the gap caused by the rotation and extrusion of the rotating skeleton 502 and enters the isolation cavity 509, the moisture will mix with the sealing oil inside it, and the sealing oil will perform a second blocking on the moisture, intercepting the moisture on the outside of the reducer body 1, and preventing moisture from entering from the position where the reducer body 1 is connected to the power output shaft 2 when the reducer body 1 is in use. The deeper sealing component 4 serves the purpose of the third blocking.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling tower fan dedicated reducer sealing enhancement structure, comprising a reducer body (1), a power output shaft (2), and a shaft lubrication mechanism (3), wherein the power output shaft (2) is inserted into a mounting hole in the reducer body (1), characterized in that: A sealing component (4) is installed in the mounting hole in the reducer body (1), and a water vapor isolation component (5) is provided on the side of the sealing component (4) away from the shaft lubrication mechanism (3); The water vapor isolation component (5) includes an isolation base (501), which is sleeved on the outside of the power output shaft (2), and the center lines of the two coincide with each other. The part of the power output shaft (2) inserted into the isolation base (501) is equipped with a rotating skeleton (502), and the left and right ends of the rotating skeleton (502) are inserted into two sets of outer sealing gaskets (503) and inner sealing gaskets (504); After the rotating skeleton (502) is inserted into the outer sealing gasket (503) and the inner sealing gasket (504), it and the inner conical plate (506) together surround an isolation cavity (509). The isolation cavity (509) is filled with sealing oil, which forms an oil layer for isolating moisture.

2. The cooling tower fan dedicated reducer sealing enhancement structure according to claim 1 is characterized in that: The sealing assembly (4) comprises an inner sealing seat (401) and an outer sealing seat (402). The inner sealing seat (401) is interference-fitted on the outer side of the power output shaft (2). A sealing ring (403) with a circular cross section is provided at the middle position of the inner sealing seat (401). When the inner sealing seat (401) and the outer sealing seat (402) are connected, the sealing ring (403) is inserted into the arc groove of the outer sealing seat (402), and the outer sealing seat (402) is installed on the inner wall of the channel of the mounting hole.

3. The sealing enhancement structure of a cooling tower fan-specific reducer according to claim 1, characterized in that: The rotating skeleton (502) comprises an intermediate ring and two conical rings. The two conical rings are smoothly mounted on both sides of the intermediate ring, and the conical rings are inclined toward a side away from the center line of the power output shaft (2).

4. The sealing enhancement structure of a cooling tower fan reducer according to claim 3 is characterized in that: The side of the conical ring that contacts the outer sealing gasket (503) is inclined surface one, and a plurality of outer sealing rods (508) are installed on inclined surface one. The diameters of the plurality of outer sealing rods (508) are different. The farther away from the transfer chamber (514), the larger the diameter of the outer sealing rod (508).

5. The sealing enhancement structure of a cooling tower fan reducer according to claim 4, characterized in that: The side of the conical ring that fits the inner sealing gasket (504) is inclined surface 2, and a plurality of inner sealing rods (507) are installed on inclined surface 2. The diameters of the multiple inner sealing rods (507) are also different. The farther the inner sealing rod (507) is from the isolation cavity (509), the larger its diameter.

6. The sealing enhancement structure of a cooling tower fan reducer according to claim 1, characterized in that: An oil extraction pipe (510) is inserted into the bottom of the isolation chamber (509), and the other end of the oil extraction pipe (510) is connected to an oil extraction assembly (512). The oil extraction assembly (512) is used to extract the sealing oil mixed with moisture from the isolation chamber (509). An oil inlet pipe (511) is also inserted into the isolation chamber (509), and the oil inlet pipe (511) is connected to an oil inlet assembly (513). The oil inlet assembly (513) is used to pass new sealing oil into the empty isolation chamber (509).

7. The sealing enhancement structure for a cooling tower fan reducer according to claim 1, characterized in that: The left and right ends of the rotating skeleton (502) are respectively inserted into two symmetrically distributed outer sealing pads (503), and the two outer sealing pads (503) are respectively installed on the inner wall of the isolation base (501) through two outer clamping rings (505). The inner wall of the rotating skeleton (502) fits two symmetrically distributed inner sealing pads (504), and the two inner sealing pads (504) are installed on the two end faces of the inner conical plate (506). Each set of outer sealing pads (503) and inner sealing pads (504) includes one outer sealing pad (503) and one inner sealing pad (504).

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