Shaft diameter sealing device capable of automatically eliminating gap
By designing a shaft diameter sealing device that automatically eliminates gaps, and utilizing push components and slide rail components to automatically compensate for wear gaps, the problem of traditional sealing devices being unable to adjust in real time is solved, thus achieving continuous sealing effect and improving equipment efficiency.
Patent Information
- Application Number
- CN202520453266.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-15
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-15
AI Technical Summary
Traditional sealing devices lack an automatic compensation mechanism, making it impossible to adjust the gap between the seal and the rotating shaft in real time. This leads to increased wear, affects the sealing effect, increases maintenance costs, and reduces equipment efficiency.
An automatic clearance-eliminating shaft diameter sealing device is designed, comprising a push component and a slide rail component. The push component automatically compensates for wear clearance, and the slide rail component provides a stable sliding path to ensure that the sealing graphite block is in close contact with the rotating shaft.
It achieves automatic compensation of the sealing device, maintains effective sealing, extends equipment life, reduces maintenance costs, and improves equipment efficiency.
Smart Images
Figure CN223725400U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of sealing device, specifically relates to a shaft diameter sealing device of automatic clearance elimination. BACKGROUND
[0002] In mechanical equipment, the shaft diameter sealing device plays a vital role, and its main function is to prevent liquid or gas from leaking from the gap between the rotating shaft and the equipment shell, thereby ensuring the normal operation of the equipment and the cleanliness of the environment.
[0003] Firstly, because the rotating shaft will produce wear during continuous operation, which leads to the gradual increase of the gap between the sealing device and the rotating shaft, and thus reduces the sealing effect, in order to maintain effective sealing, it is usually necessary to replace the sealing element regularly, which not only increases the maintenance cost, but also affects the continuous operation of the equipment.
[0004] Secondly, the traditional sealing device often lacks automatic compensation mechanism and cannot adjust the gap between the sealing element and the rotating shaft in real time, when the gap increases to a certain extent, the sealing effect will be greatly reduced, there will be air leakage and material leakage problems, air leakage will greatly affect the work effect of the equipment, leading to a decrease in production capacity, and the material leakage problem not only increases the human output of on-site equipment sanitation maintenance, but also fails to meet the environmental management requirements. SUMMARY
[0005] In view of the above problems, the purpose of the utility model is to provide a shaft diameter sealing device capable of automatically eliminating the gap, which solves the problems raised in the background.
[0006] The utility model provides a kind of shaft diameter sealing device of automatic clearance elimination, including installation bottom plate being arranged along the outer surface of rotating shaft and being welded with equipment shell and the fixed frame for installing graphite block connected with installation bottom plate, the graphite block includes two sealing graphite blocks with arc-shaped end face, two sealing graphite blocks are symmetrically arranged on the both sides of rotating shaft, two sealing graphite blocks are all in sliding contact with installation bottom plate and fixed frame, and push component is installed on the installation bottom plate, the push component is used to move sealing graphite block to the side close to rotating shaft to offset the wear gap between graphite block and rotating shaft after sealing graphite block is worn by rotating shaft.
[0007] Preferably, the push component includes a fixed plate fixedly connected to the equipment shell, a screw rod slidingly connected to the fixed plate and having a pressure conducting plate installed at one end close to the rotating shaft, and a spring arranged along the outer surface of the screw rod and located between the fixed plate and the pressure conducting plate.
[0008] Preferably, the sliding rail assembly includes two vertical graphite blocks, and two sealing graphite blocks are located between the two vertical graphite blocks, and when the sealing graphite blocks are worn and pushed to slide towards the side close to the rotating shaft under the elasticity of the spring, the vertical graphite blocks serve as sliding rails for the sealing graphite blocks.
[0009] Preferably, the fixed frame includes a horizontal fixed plate for attaching the graphite blocks to the mounting plate and vertical fixed plates symmetrically arranged outside the horizontal fixed plate and connected to the mounting plate by bolts to stabilize the position of the horizontal fixed plate.
[0010] Preferably, the end of the vertical graphite block close to the sealing graphite block is coated with a lubricating layer to reduce the friction between the sealing graphite block and the vertical graphite block.
[0011] Preferably, the gap between the rotating shaft and the inner hole of the sealing mounting plate is 2-4 mm.
[0012] The utility model discloses a graphite block sealing device for a rotating shaft of a rotating equipment, which comprises a rotating shaft, a sealing graphite block, a fixed frame, a push assembly and a mounting plate.
[0013] The vertical graphite block serves as a sliding rail assembly and provides a stable sliding track for the sealing graphite block, thereby increasing the sealing effect of the sealing graphite block between the rotating shaft and the equipment shell. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model;
[0015] Figure 2 It is a structural schematic diagram of the utility model without the fixed frame;
[0016] Figure 3 It is a principle structural schematic diagram of the push assembly of the utility model;
[0017] Figure 4 It is a sectional structural schematic diagram of the utility model.
[0018] In the figure: 1, rotating shaft; 2, mounting plate; 3, fixed frame; 4, sealing graphite block; 5, push assembly; 6, fixed plate; 7, pressure transmission plate; 8, screw rod; 9, spring; 10, vertical graphite block; 11, horizontal fixed plate; 12, vertical fixed plate; 13, bolt; 14, equipment shell. DETAILED DESCRIPTION
[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.
[0020] like Figures 1-4 As shown, an automatic gap-eliminating shaft diameter sealing device includes a mounting base plate 2 disposed along the outer surface of a rotating shaft 1 and welded to a device housing 14, and a fixing frame 3 connected to the mounting base plate 2 for mounting graphite blocks. The graphite blocks include two sealing graphite blocks 4 with arc-shaped end faces, which are symmetrically arranged on both sides of the rotating shaft 1. Both sealing graphite blocks 4 are in sliding contact with the mounting base plate 2 and the fixing frame 3. A pushing component 5 is installed on the mounting base plate 2. The pushing component 5 is used to automatically move the sealing graphite blocks 4 closer to the rotating shaft 1 after the sealing graphite blocks 4 are worn by the rotating shaft 1 to compensate for the wear gap between the graphite blocks and the rotating shaft 1. Compared with the prior art, this automatic compensation mechanism ensures that the sealing device can always maintain an effective sealing effect and extends the service life of the equipment.
[0021] Furthermore, such as Figures 1-4 As shown, the pushing component 5 includes a fixed plate 6 fixedly connected to the device housing 14, a screw 8 slidably connected to the fixed plate 6 and with a pressure transmission plate 7 installed at one end near the rotating shaft 1, and a spring 9 arranged along the outer surface of the screw 8 and located between the fixed plate 6 and the pressure transmission plate 7. When the sealing graphite block 4 is not worn, the spring 9 is in a strongly compressed state. When the sealing graphite block 4 is worn by the rotating shaft 1, the sealing graphite block 4 becomes shorter. Under the elastic action of the spring 9, the screw 8 is driven to slide along the fixed plate 6 towards the side near the rotating shaft 1 (i.e., the direction of F1 in the figure), and slides against the sealing graphite block 4 along the surface of the mounting base plate 2 and the fixed frame 3 towards the side near the rotating shaft 1, and fits against the surface of the rotating shaft 1.
[0022] Furthermore, such as Figure 2 As shown, it also includes a slide rail assembly, which can be two vertical graphite blocks 10, with two sealing graphite blocks 4 located between the two vertical graphite blocks 10. When the sealing graphite blocks 4 are worn, under the elastic action of the spring 9, the sealing graphite blocks 4 are pushed to slide towards the side closer to the rotating shaft 1. The vertical graphite blocks 10 act as sliding guides for the sealing graphite blocks 4, providing a stable sliding path for the sealing graphite blocks 4. When the sealing graphite blocks 4 are located on the left and right sides of the rotating shaft 1, the two vertical graphite blocks 10 are located on the upper and lower sides of the rotating shaft 1, respectively. When the sealing graphite blocks 4 are located on the upper and lower sides of the rotating shaft 1, the two vertical graphite blocks 10 are located on the left and right sides of the rotating shaft 1, respectively. In this case, as shown... Figure 2As shown, two sealing graphite blocks 4 are located on the left and right sides of the rotating shaft 1.
[0023] Further, as shown in the figure, Figure 1 As shown, the fixed frame 3 includes a transverse fixed plate 11 and vertical fixed plates 12 symmetrically arranged outside the transverse fixed plate 11, the transverse fixed plate 11 is used to adhere the graphite block to the mounting base plate 2, and the vertical fixed plates 12 are connected with the mounting base plate 2 through bolts 13 to realize the stable fixing position of the transverse fixed plate 11. The design of the transverse fixed plate 11 and the vertical fixed plate 12 ensures the stable fixing position of the graphite block on the mounting base plate 2, avoiding displacement caused by vibration or impact.
[0024] Further, as shown in the figure, Figures 1-2 As shown, one end of the vertical graphite block 10 close to the sealing graphite block 4 is coated with a lubricating layer to reduce the friction between the sealing graphite block 4 and the vertical graphite block 10. Of course, tools such as grinders, grinding wheels or abrasive paste can also be used to finely grind and polish the surface of the vertical graphite block 10.
[0025] Further, as shown in the figure, Figure 4 As shown, the gap between the rotating shaft 1 and the inner hole of the sealing mounting base plate 2 is 2-4 mm. The shaft and the mounting base plate 2 may expand or contract due to temperature changes during work. Setting a gap of 2-4 mm can accommodate this small size change, prevent sealing failure or graphite block damage caused by thermal expansion and contraction, and thus ensure long-term stable operation of the equipment.
Claims
1. An automatic gap-eliminating shaft diameter sealing device, comprising a mounting base plate (2) arranged along the outer surface of a rotating shaft (1) and welded with a device shell (14), and a fixing frame (3) connected with the mounting base plate (2) and used for mounting a graphite block, characterized in that: The graphite block comprises two sealing graphite blocks (4) with arc-shaped end faces, the two sealing graphite blocks (4) are symmetrically arranged on two sides of the rotating shaft (1), the two sealing graphite blocks (4) are in sliding contact with the mounting bottom plate (2) and the fixed frame (3), and the mounting bottom plate (2) is provided with a pushing assembly (5), the pushing assembly (5) is used for moving the sealing graphite block (4) to the side close to the rotating shaft (1) to offset the wear gap between the graphite block and the rotating shaft (1) after the sealing graphite block (4) is worn by the rotating shaft (1).
2. A self-eliminating gap shaft diameter sealing device according to claim 1, characterized in that: The pushing assembly (5) comprises a fixed plate (6) fixedly connected to the equipment shell (14), a screw rod (8) in sliding connection with the fixed plate (6) and provided with a pressure transmission plate (7) at an end close to the rotating shaft (1), and a spring (9) arranged along the outer surface of the screw rod (8) and located between the fixed plate (6) and the pressure transmission plate (7).
3. A self-eliminating gap shaft diameter sealing device according to claim 2, characterized in that: Further comprising a slide rail assembly, the slide rail assembly can be two vertical graphite blocks (10), the two sealing graphite blocks (4) are located between the two vertical graphite blocks (10), when the sealing graphite block (4) is worn and slides to the side close to the rotating shaft (1) under the elastic action of the spring (9), the vertical graphite block (10) serves as a sliding guide rail of the sealing graphite block (4).
4. A self-eliminating gap shaft diameter sealing device according to claim 1, characterized in that: The fixed frame (3) comprises a horizontal fixed plate (11) and vertical fixed plates (12) symmetrically arranged on the outer side of the horizontal fixed plate (11), the horizontal fixed plate (11) is used for attaching the graphite block to the mounting bottom plate (2), and the vertical fixed plates (12) are connected with the mounting bottom plate (2) through bolts (13) to stabilize the position of the horizontal fixed plate (11).
5. A self-eliminating gap axial seal device according to claim 3, wherein: An end of the vertical graphite block (10) close to the sealing graphite block (4) is coated with a lubricating layer to reduce the friction between the sealing graphite block (4) and the vertical graphite block (10).
6. A self-eliminating gap shaft diameter sealing device according to claim 1, characterized in that: The gap between the rotating shaft (1) and the inner hole of the sealing mounting bottom plate (2) is 2-4 mm.