A top-drive fan motor shaft sealing device

Abstract

This utility model discloses a sealing device for a top-drive fan motor shaft, relating to the technical field of top-drive fan motor shafts. The utility model includes a motor housing and a motor shaft disposed on the right side of the motor housing. A sealing shell is fitted onto the outer wall of the motor shaft. It also includes: a fixing part mounted on the motor housing; a sealing part disposed within the sealing shell; the fixing part includes several fixing components mounted on the motor housing; and several mounting components mounted on the motor housing. This utility model, by incorporating a fixing part, solves the problem that existing motor shaft sealing devices often use a single fixing method, which is prone to loosening due to vibrations generated during motor operation, leading to insufficient reliability of the connection between the sealing shell and the motor housing, thus affecting the sealing effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of top drive fan motor shafts, and particularly relates to a sealing device for a top drive fan motor shaft. Background Technique

[0002] The top drive fan motor shaft is the core transmission component of the top drive supporting fan motor. Its main function is to connect the motor rotor and the fan impeller, transfer the mechanical energy output by the motor to the impeller, and drive the fan to operate to achieve the heat dissipation or ventilation function of the top drive system. It is an important transmission carrier to ensure the stable heat dissipation of the top drive equipment during drilling operations and avoid overheating failures. The motor shaft requires a sealing device because a dynamic gap is formed between the motor shaft and the motor housing during operation. If not sealed, impurities such as dust, drilling fluid, and moisture in the outside world are likely to enter the motor through this gap, resulting in the motor winding being damp and short-circuited, and the bearing wear being aggravated. At the same time, the lubricating oil inside the motor may also leak through the gap, causing lubrication failure, and ultimately leading to motor failures and affecting the normal operation of the top drive system. Therefore, the sealing device can effectively isolate the internal and external media, protect the internal components of the motor, extend the service life of the motor, and ensure the reliable operation of the top drive fan.

[0003] However, in the process of using the existing motor shaft sealing device, a single fixing method is mostly adopted, which is prone to connection loosening problems due to the vibration generated during motor operation, resulting in insufficient connection reliability between the sealing shell and the motor shell, thereby affecting the sealing effect. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sealing device for a top drive fan motor shaft. By setting a fixing part, the problem that in the process of using the existing motor shaft sealing device, a single fixing method is mostly adopted, which is prone to connection loosening problems due to the vibration generated during motor operation, resulting in insufficient connection reliability between the sealing shell and the motor shell, thereby affecting the sealing effect is solved.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions: This utility model relates to a sealing device for a top-drive fan motor shaft, comprising a motor housing and a motor shaft disposed on the right side of the motor housing. A sealing shell is fitted over the outer wall of the motor shaft. The device further includes: a fixing part mounted on the motor housing; a sealing part disposed within the sealing shell; the fixing part comprising fixing components, of which several are mounted on the motor housing; and mounting components, of which several are disposed on the motor housing; each fixing component includes a rectangular block fixedly connected to the outer wall of the motor housing, the rectangular block having a rectangular groove in which a fixing plate is slidably connected; and a fixing groove on the sealing shell. The fixing plate is adapted to the fixing groove, and a support is provided on the fixing plate. Four fixing components and four mounting components are provided, arranged in a circumferential array. Each support includes two sliding rods fixedly connected to the top of the fixing plate. The tops of both sliding rods extend beyond the rectangular block, and both sliding rods are slidably connected to the rectangular block. A rectangular handle is fixedly connected to the top of each sliding rod. A spring is fitted onto the outer wall of each sliding rod, with the top of each spring fixedly connected to the rectangular block and the bottom of each spring fixedly connected to the fixing plate. Both springs are located within the rectangular groove, and the rectangular handles are located outside the rectangular block, facilitating the pulling of the fixing plate away from the fixing groove during disassembly, thus balancing fixing reliability and operational convenience.

[0006] Furthermore, the sealing part includes a sealing assembly installed inside the sealing housing; and a compensation assembly installed on the sealing assembly.

[0007] Furthermore, the mounting assembly includes mounting holes respectively opened on the motor housing and the sealing housing, with bolts installed in the two mounting holes, and nuts threaded onto the bolts to prevent loosening of the connection after long-term use and to provide a stable installation environment for the sealing part.

[0008] Furthermore, the sealing assembly includes a stationary ring fixedly connected to the inner wall of the sealing shell, a rotating ring fixedly connected to the outer wall of the motor shaft, the rotating ring being in contact with the inner wall of the sealing shell, two hollow rings being provided inside the sealing shell, and a sealing element being provided inside the sealing shell; the hollow ring on the left is located on the rotating ring, and the hollow ring on the right is located to the right of the rotating ring; the sealing element includes rubber ring 1 respectively fitted onto the outer wall of the two hollow rings, and two rubber ring 2 are provided on the stationary ring; the rubber ring 2 on the left is located between the stationary ring and the motor housing, and the rubber ring 2 on the right is fitted onto the outer wall of the stationary ring; both rubber ring 1 are located inside the sealing shell, and the rubber ring 1 and rubber ring 2 respectively fill the gaps between the components to form an auxiliary seal, which, together with the main sealing surface, constitutes a multi-seal system to improve sealing reliability.

[0009] Furthermore, the compensation assembly includes several telescopic rods fixedly connected to the inner right walls of the two hollow rings. Each of the two hollow rings contains a ring plate, which is fixedly connected to the telescopic rods. Springs are fitted onto the outer walls of each telescopic rod. The left sides of each spring are fixedly connected to the two ring plates, and the right sides are fixedly connected to the hollow rings. Both ring plates are in contact with the moving ring. The springs and telescopic rods are in a compressed state, automatically compensating for wear, maintaining a tight fit, preventing seal failure, and extending the service life of the sealing device.

[0010] This utility model has the following beneficial effects: 1. By setting a fixing part, during installation, the sealing part is fitted onto the motor shaft through the sealing shell, so that the sealing shell aligns with the mounting hole of the motor housing. The sealing shell presses against the fixing plate, causing the sliding rods to move away from each other and compressing the first spring. When the fixing plate aligns with the fixing groove, the elastic force of the first spring causes the fixing plate to reset and snap into the fixing groove to complete the initial fixing. Then, the fixing is done a second time with bolts and nuts. The cooperation between the fixing plate and the fixing groove can prevent the motor housing and the sealing shell from loosening. The double fixing method improves the stability and reliability of the connection, effectively avoids the problem of loose connection that may occur with a single fixing method, and improves the sealing effect. 2. By setting up a sealing section, the left rubber ring II ensures the seal between the stationary ring and the motor housing, while the right rubber ring II and two rubber rings I ensure the seal between the stationary ring, the two hollow rings, and the sealing shell. When the motor shaft rotates, it drives the rotating ring to rotate. When the rotating ring rubs against the stationary ring, causing damage and gaps, the elastic force of spring II pushes the ring plate to bring the rotating ring closer to the stationary ring. The telescopic rod ensures that the ring plate moves smoothly, maintaining a tight fit between the rotating and stationary rings and preventing impurities from entering or internal substances from leaking. The cooperation between spring II and the telescopic rod can automatically compensate for the wear caused by friction between the rotating and stationary rings, always maintaining a tight fit between them, and ensuring the stability and reliability of the equipment operation.

[0011] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial cross-sectional view of the fixing component of this utility model; Figure 3 This utility model Figure 2 A magnified structural diagram of A in the middle; Figure 4 This is a partial exploded view of the mounting assembly of this utility model; Figure 5 This is a partial cross-sectional view of the sealing part of this utility model; Figure 6 This is a partial cross-sectional exploded view of the sealing part of this utility model; Figure 7 This utility model Figure 6 A magnified structural diagram of B in the diagram.

[0014] The attached diagram lists the components represented by each number as follows: 111. Motor housing; 112. Motor shaft; 113. Sealing shell; 2. Fixing part; 21. Fixing assembly; 211. Rectangular block; 212. Rectangular slide groove; 213. Fixing plate; 214. Fixing groove; 215. Slide rod; 216. Rectangular handle; 217. Spring one; 22. Mounting assembly; 221. Mounting hole; 222. Bolt; 223. Nut; 3. Sealing part; 31. Sealing assembly; 311. Stationary ring; 312. Moving ring; 313. Hollow ring; 314. Rubber ring one; 315. Rubber ring two; 32. Compensation assembly; 321. Telescopic rod; 322. Circular ring plate; 323. Spring two. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-7 As shown, this utility model is a sealing device for the motor shaft of a top-drive fan, including a motor housing 111 and a motor shaft 112 disposed on the right side of the motor housing 111. A sealing shell 113 is sleeved on the outer wall of the motor shaft 112. It also includes: a fixing part 2, which is installed on the motor housing 111; and a sealing part 3, which is disposed inside the sealing shell 113.

[0017] The fixing part 2 includes fixing components 21, of which several fixing components 21 are mounted on the motor housing 111; and mounting components 22, of which several mounting components 22 are mounted on the motor housing 111. Each fixing component 21 includes a rectangular block 211 fixedly connected to the outer wall of the motor housing 111. A rectangular groove 212 is formed on the rectangular block 211, and a fixing plate 213 is slidably connected within the rectangular groove 212. A fixing groove 214 is formed on the sealing housing 113, and the fixing plate 213 is adapted to the fixing groove 214. A support member is provided on the fixing plate 213. Four fixing components 21 and four mounting components 22 are provided in a circular array. Each support member includes two sliding rods 215 fixedly connected to the top of the fixing plate 213. The tops of both sliding rods 215 extend beyond the rectangular block 211, and both sliding rods 215 are slidably connected to the rectangular block 211. Next, rectangular handles 216 are fixedly connected to the top of the two slide rods 215. Springs 217 are fitted on the outer walls of the two slide rods 215. The tops of the two springs 217 are fixedly connected to the rectangular block 211, and the bottoms of the two springs 217 are fixedly connected to the fixing plate 213. The two springs 217 are located inside the rectangular slide groove 212, and the rectangular handles 216 are located outside the rectangular block 211. The mounting assembly 22 includes mounting holes 221 respectively opened on the motor housing 111 and the sealing housing 113. Bolts 222 are installed in the two mounting holes 221, and nuts 223 are threaded onto the bolts 222. By setting the fixing part 2, the cooperation between the fixing plate 213 and the fixing groove 214 can prevent the motor housing 111 and the sealing housing 113 from loosening. The double fixing method improves the stability and reliability of the connection, effectively avoids the problem of loose connection that may occur with a single fixing method, and improves the sealing effect.

[0018] The sealing part 3 includes a sealing assembly 31, which is installed inside the sealing housing 113; and a compensation assembly 32, which is installed on the sealing assembly 31. The sealing assembly 31 includes a stationary ring 311 fixedly connected to the inner wall of the sealing housing 113, and a rotating ring 312 fixedly connected to the outer wall of the motor shaft 112. The rotating ring 312 contacts the inner wall of the sealing housing 113. Two hollow rings 313 are provided inside the sealing housing 113, and a sealing element is provided inside the sealing housing 113. The hollow ring 313 on the left is located on the moving ring 312, and the hollow ring 313 on the right is located to the right of the moving ring 312. The sealing element includes rubber ring 314 respectively fitted on the outer wall of the two hollow rings 313, and two rubber rings 315 are provided on the stationary ring 311; the rubber ring 315 on the left is located between the stationary ring 311 and the motor housing 111, and the rubber ring 315 on the right is fitted on the outer wall of the stationary ring 311. Both rubber rings 314 are... Located within the sealed housing 113, the compensation assembly 32 includes several telescopic rods 321 fixedly connected to the inner right walls of two hollow rings 313. Each of the two hollow rings 313 contains a ring plate 322, which is fixedly connected to the telescopic rods 321. Springs 323 are fitted onto the outer walls of each telescopic rod 321. The left sides of each spring 323 are fixedly connected to the two ring plates 322, and the right sides are fixedly connected to the hollow rings 313. Both ring plates 322 are in contact with the moving ring 312. The springs 323 and telescopic rods 321 are in a compressed state. The sealing part 3 prevents impurities from entering or internal substances from leaking. The cooperation between the springs 323 and the telescopic rods 321 automatically compensates for wear caused by friction between the moving ring 312 and the stationary ring 311, maintaining a tight fit and ensuring the stability and reliability of the equipment operation.

[0019] A specific application of this embodiment is as follows: In use, the sealing part 3 is sleeved on the motor shaft 112 through the sealing shell 113, and the four mounting holes 221 on the sealing shell 113 correspond to the four mounting holes 221 on the motor housing 111. During this process, the sealing shell 113 will press the arc surfaces of the four fixing plates 213 against the several fixing plates 213, causing the several fixing plates 213 to push the corresponding slide rods 215 away from each other. During this process, the several fixing plates 213 will respectively exert pressure on the several springs 215. 17. Extrusion causes several springs 217 to deform and generate elastic force. When the four fixing plates 213 correspond to the four fixing slots 214 respectively, the elastic force of the springs 217 causes the four fixing plates 213 to drive the corresponding sliding rods 215 to reset. At this time, the fixing plates 213 are respectively inserted into the corresponding fixing slots 214, thereby fixing the sealing shell 113. Then, four bolts 222 are respectively inserted into several mounting holes 221, and then four nuts 223 are respectively screwed in. Four bolts 222 are used to secondary fix the sealing shell 113 and the motor shell 111. When the motor rotates, it will vibrate. Under the action of several fixing plates 213 and several fixing grooves 214, the motor shell 111 and the sealing shell 113 are prevented from loosening. At this time, the rubber ring 2 315 on the left side is used to maintain the sealing state between the stationary ring 311 and the motor shell 111. The rubber ring 2 315 and the two rubber rings 314 on the right side are used to keep the stationary ring 311 and the two hollow rings 313 from the sealing shell 111. In the sealed state between 3, when the motor shaft 112 rotates, the motor shaft 112 drives the moving ring 312 to rotate inside the sealing shell 113. At this time, the moving ring 312 will rub against the stationary ring 311 and cause damage, increasing the gap between them. Under the action of the elastic force of several springs 323, the two circular plates 322 are prompted to push the moving ring 312 closer to the stationary ring 311. At this time, under the action of several telescopic rods 321, the two circular plates 322 are prompted to move smoothly, so that the moving ring 312 and the stationary ring 311 are kept in a tight fit.

[0020] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sealing device for a top-drive fan motor shaft, comprising a motor housing (111) and a motor shaft (112) disposed on the right side of the motor housing (111), wherein a sealing shell (113) is fitted over the outer wall of the motor shaft (112), characterized in that, Also includes: Fixing part (2), which is mounted on the motor housing (111); A sealing part (3) is disposed inside a sealing shell (113); The fixing part (2) includes fixing components (21), and a plurality of fixing components (21) are provided, and a plurality of fixing components (21) are mounted on the motor housing (111); and Mounting components (22), a plurality of which are provided, and a plurality of the mounting components (22) are mounted on the motor housing (111); The fixing component (21) includes a rectangular block (211) fixedly connected to the outer wall of the motor housing (111). A rectangular groove (212) is provided on the rectangular block (211). A fixing plate (213) is slidably connected in the rectangular groove (212). A fixing groove (214) is provided on the sealing housing (113). The fixing plate (213) is adapted to the fixing groove (214). A support member is provided on the fixing plate (213). The fixing component (21) and the mounting component (22) are each provided in four, arranged in a circular array.

2. The top-drive fan motor shaft sealing device according to claim 1, characterized in that, The sealing part (3) includes a sealing assembly (31) which is installed inside the sealing housing (113); and Compensation component (32) is mounted on sealing component (31).

3. The top-drive fan motor shaft sealing device according to claim 2, characterized in that, The mounting assembly (22) includes mounting holes (221) respectively opened on the motor housing (111) and the sealing housing (113), and bolts (222) are provided in the two mounting holes (221), and nuts (223) are threaded onto the bolts (222).

4. The top-drive fan motor shaft sealing device according to claim 3, characterized in that, The sealing assembly (31) includes a stationary ring (311) fixedly connected to the inner wall of the sealing shell (113), a rotating ring (312) fixedly connected to the outer wall of the motor shaft (112), the rotating ring (312) being in contact with the inner wall of the sealing shell (113), two hollow rings (313) being provided inside the sealing shell (113), and a sealing element being provided inside the sealing shell (113); Among them, the hollow ring (313) on the left is located on the moving ring (312), and the hollow ring (313) on the right is located to the right of the moving ring (312).

5. The top-drive fan motor shaft sealing device according to claim 4, characterized in that, The compensation component (32) includes a plurality of telescopic rods (321) fixedly connected to the inner right side walls of two hollow rings (313). Each of the two hollow rings (313) is provided with a ring plate (322). The two ring plates (322) are fixedly connected to the plurality of telescopic rods (321). The outer walls of the plurality of telescopic rods (321) are fitted with springs (323). The left sides of the plurality of springs (323) are fixedly connected to the two ring plates (322), and the right sides of the plurality of springs (323) are fixedly connected to the plurality of hollow rings (313). Among them, both annular plates (322) are in contact with the moving ring (312), and several springs (323) and several telescopic rods (321) are in a compressed state.

6. The top-drive fan motor shaft sealing device according to claim 5, characterized in that, The support includes two slide rods (215) fixedly connected to the top of the fixed plate (213). The tops of the two slide rods (215) extend outside the rectangular block (211). The two slide rods (215) are slidably connected to the rectangular block (211). A rectangular handle (216) is fixedly connected to the top of the two slide rods (215). A spring (217) is sleeved on the outer wall of the two slide rods (215). The tops of the two springs (217) are fixedly connected to the rectangular block (211). The bottoms of the two springs (217) are fixedly connected to the fixed plate (213). Among them, the two springs (217) are located inside the rectangular groove (212), and the rectangular handle (216) is located outside the rectangular block (211).

7. A top-drive fan motor shaft sealing device according to claim 6, characterized in that, The sealing element includes a rubber ring 1 (314) respectively fitted on the outer wall of two hollow rings (313), and two rubber rings 2 (315) are provided on the stationary ring (311). Among them, the second rubber ring (315) on the left is located between the stationary ring (311) and the motor housing (111), the second rubber ring (315) on the right is sleeved on the outer wall of the stationary ring (311), and the two first rubber rings (314) are located inside the sealing shell (113).

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