Improved fan shaft sealing structure
By setting the back plate and skeleton oil seal on the fan spindle, and canceling the oil seal gland and screws, the problem of inconvenient installation and adjustment of the skeleton oil seal during the fan during maintenance is solved, the convenience of installation and controllability of quality is achieved, the reliability of the seal structure is improved, and equipment accidents are avoided.
Patent Information
- Application Number
- CN202420142758.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-01-19
AI Technical Summary
During the maintenance and disassembly process of existing fans, the adjustment and tightening of the skeleton oil seal and oil seal pressure gland is limited by the structural space, which leads to inconvenience in installation and adjustment, which increases construction difficulty, time-consuming and labor-intensive, and is difficult to ensure the installation quality, which can easily cause the rotor to bump into the grinder.
The back plate and skeleton oil seal are installed on the main shaft of the fan. The back plate has a shaft hole in the center and is installed on the main shaft. The skeleton oil seal fits in the annular groove on the back plate near the impeller. The original skeleton oil seal gland and gland screw are cancelled, and only normal adjustment and tightening of the back plate seal is performed.
It minimizes the difficulty of installing and adjusting the skeleton oil seal, improves the convenience of installation and quality controllability, eliminates equipment and safety accidents caused by improper installation, and improves the reliability of the sealing structure.
Smart Images
Figure CN222746300U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an improved fan shaft sealing structure. Background Art
[0002] The existing fan is a single-intake cantilever support structure, and the rotor shaft seal adopts comb seal + nitrogen seal + skeleton oil seal. During the fan maintenance and disassembly process, the oil seal gland is less than 15mm away from the bearing box. The adjustment and fastening of the skeleton oil seal and the oil seal gland are limited by the structural space, and the installation and adjustment are very inconvenient. On the one hand, it increases the difficulty of construction for on-site maintenance personnel, which is time-consuming and laborious. On the other hand, it is difficult to ensure the installation quality, which often causes rotor collision and jumping accidents due to improper installation and adjustment of the skeleton oil seal and the oil seal gland. Summary of the invention
[0003] The utility model aims to provide an improved fan shaft sealing structure, which can be easily installed and adjusted, the installation quality is easy to ensure, and the long-term operation is safe and reliable.
[0004] The technical solution adopted by the utility model is an improved fan shaft sealing structure, including a back plate and a skeleton oil seal arranged on a main shaft on which an impeller is installed, the back plate has an axial hole at the center and is sleeved on the main shaft, an annular groove is arranged in the plate body at the axial hole on the side of the back plate close to the impeller, and the skeleton oil seal is fitted in the annular groove.
[0005] The utility model structure adjusts the skeleton oil seal installation groove to the inner side of the back plate seal (close to the impeller side), and at the same time eliminates the original skeleton oil seal gland and gland screws. After the transformation, only the normal adjustment and tightening of the back plate seal is required, which is convenient and quick to install, and completely saves the adjustment and tightening steps of the skeleton oil seal and the oil seal gland. With the utility model structure, 1. This sealing structure reduces the difficulty of skeleton oil seal installation and adjustment to the greatest extent, and maintenance personnel can easily and conveniently complete the reinstallation of the skeleton oil seal, solving the problem of laborious and time-consuming installation and adjustment of the original structure. 2. This sealing structure is practical and has high controllability of installation quality, which solves the problem of difficult control of installation quality of the original structure, improves the reliability of the sealing structure, and eliminates the probability of equipment accidents and safety accidents caused by it. This structure has been applied to the fan of the energy center with good results. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 It is a schematic diagram of the main structure of the utility model. Implementation
[0007] An improved fan shaft sealing structure, such as Figure 1As shown, it includes an impeller 1, a back plate 2 and a skeleton oil seal 4 installed on the main shaft 3. The back plate 2 has an axial hole in the center and is mounted on the main shaft 3. An annular groove is arranged in the plate body at the axial hole on the side of the back plate 2 close to the impeller 1, and the skeleton oil seal 4 is fitted in the annular groove.
Claims
1. An improved fan shaft sealing structure, comprising a back plate and a skeleton oil seal arranged on a main shaft on which an impeller is mounted, wherein the back plate has a shaft hole at its center and is sleeved on the main shaft, and is characterized by: An annular groove is arranged in the plate body at the shaft hole on one side of the back plate close to the impeller, and the skeleton oil seal is fitted in the annular groove.