A quenching shaft end sealing structure

Abstract

The utility model relates to shaft end sealing technical field, especially a kind of tempering shaft shaft end sealing structure, tempering shaft is rotatably connected with wallboard by connecting component, sealing structure includes packing, sealing seat, gland and sealing disc, sealing seat, gland and sealing disc are sequentially sleeved in tempering shaft outside, sealing disc is fixedly connected with tempering shaft, sealing seat is fixedly connected with wallboard, gland is fixedly connected with sealing seat, the end face of sealing seat and sealing disc opposite each other is mutually embedded and forms labyrinth sealing structure, labyrinth sealing structure is perpendicular to the axial direction of tempering shaft, sealing seat inner ring has installation part and matching part, packing is arranged in installation part, and packing is formed between sealing seat and tempering shaft and forms packing seal structure, gland is arranged in the end portion of installation part away from matching part.The utility model uses the combined structure of packing seal and labyrinth seal, and the sealing effect is good;Sealing disc is easy to install and adjust, and the sealing is reliable;Gland is detachable, and packing is replaced, and maintenance cost is low.

Description

Technical Field

[0001] This utility model relates to the field of shaft end sealing technology, and in particular to a quenched and tempered shaft end sealing structure. Background Technology

[0002] Existing sealing structures generally include packing seals, face gas seals, and labyrinth seals. These have limitations for certain applications. Packing seals are typically used on shaft ends, but the packing is prone to failure due to wear; face gas seals require high installation precision but are difficult to maintain and replace; labyrinth seals have high installation precision but poor sealing performance for highly fluid materials. A single sealing structure cannot meet the needs of some complex applications, resulting in inadequate sealing. Furthermore, replacing worn packing in existing sealing structures is complex, time-consuming, and not quick or convenient. Utility Model Content

[0003] The technical problem to be solved by this utility model is: In order to overcome the above-mentioned technical problems, this utility model provides a quenched and tempered shaft end sealing structure, which can effectively improve the sealing effect of the shaft end while ensuring that the assembly difficulty is not very high, and the installation and maintenance of the sealing packing are convenient.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a sealing structure for the end of a tempering shaft, wherein the tempering shaft is rotatably connected to a wall panel through a connecting component, and the sealing structure includes a packing, a sealing seat, a pressure cap, and a sealing disc. The sealing seat, pressure cap, and sealing disc are sequentially sleeved on the tempering shaft. The sealing disc is fixedly connected to the tempering shaft, the sealing seat is fixedly connected to the wall panel, the pressure cap is fixedly connected to the sealing seat, the pressure cap is clearance-fitted to the tempering shaft, and the sealing disc is interference-fitted to the tempering shaft. The opposite end faces of the sealing seat and the sealing disc are interlocked. A labyrinth seal structure is formed, which is perpendicular to the axial direction of the tempering shaft. The inner ring of the seal seat has an mounting part and a mating part. The mounting part is located on the side away from the seal disc, and the mating part is located on the side closer to the seal disc. The inner diameter of the mounting part is larger than the outer diameter of the tempering shaft. The mating part is clearance-fitted with the tempering shaft. The mounting part and the mating part are connected to each other to form a step. The packing is disposed in the mounting part. A packing seal structure is formed between the seal seat and the tempering shaft through the packing. The gland is disposed on the end of the mounting part away from the mating part.

[0005] Different labyrinth clearances are set according to different shaft diameters. The outer diameter of the tempered shaft is 100-180mm, the radial labyrinth clearance e of the labyrinth sealing structure is 0.2-0.5mm, and the axial labyrinth clearance f is 1.0-2.5mm.

[0006] Preferably, the outer diameter of the tempered shaft is 105 mm, the radial labyrinth gap e of the labyrinth seal structure is 0.4 mm, and the axial labyrinth gap f is 2 mm.

[0007] Preferably, the gland is fixed to the sealing seat by bolts to compress the packing.

[0008] Preferably, the sealing disc is fixed to the tempering shaft by set screws.

[0009] Preferably, the sealing seat is welded to the wall panel.

[0010] To facilitate packing replacement, the gland is a split type, allowing for quick replacement and maintenance when the packing needs to be replaced due to wear.

[0011] To facilitate the extrusion of the packing, the inner diameter of the mounting portion is uniform.

[0012] The beneficial effects of this utility model are that the quenched and tempered shaft end sealing structure of this utility model is suitable for rotary mechanical seals and complex scenarios where hot steam encounters cold and produces condensate, thus achieving double protection; the combination structure of packing seal and labyrinth seal provides good sealing effect; the sealing disc is easy to install and adjust, and the sealing is reliable; the gland is detachable, allowing for packing replacement and low maintenance cost. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a cross-sectional schematic diagram of the preferred embodiment of the quenched and tempered shaft end sealing structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the quenched and tempered shaft end sealing structure after installation.

[0016] Figure 3 This is a schematic diagram of the labyrinth gap structure of the labyrinth seal structure in the quenched and tempered shaft end sealing structure of this utility model.

[0017] In the diagram: 1. Set screw, 2. Sealing seat, 2-1. Mounting part, 2-2. Mating part, 3. Gland, 4. Tempered shaft, 5. Packing, 6. Sealing disc, 7. Wall panel, 8. Labyrinth seal structure, 9. Bolt. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] like Figure 1-3As shown, this utility model discloses a sealing structure for the end of a tempering shaft 4. The tempering shaft 4 is rotatably connected to a wall plate 7 via a connecting component. The sealing structure includes a packing 5, a sealing seat 2, a pressure cap 3, and a sealing disc 6. The sealing seat 2, pressure cap 3, and sealing disc 6 are sequentially sleeved on the outside of the tempering shaft 4. The sealing disc 6 is fixedly connected to the tempering shaft 4, the sealing seat 2 is fixedly connected to the wall plate 7, the pressure cap 3 is fixedly connected to the sealing seat 2, the pressure cap 3 is clearance-fitted to the tempering shaft 4, and the sealing disc 6 is interference-fitted to the tempering shaft 4. The sealing seat 2 and the sealing disc 6 interlock on their opposite end faces to form a labyrinth sealing structure 8. The structure 8 is perpendicular to the axial direction of the tempering shaft 4. The inner ring of the sealing seat 2 has a mounting part 2-1 and a mating part 2-2. The mounting part 2-1 is located on the side away from the sealing disc 6, and the mating part 2-2 is located on the side close to the sealing disc 6. The inner diameter of the mounting part 2-1 is larger than the outer diameter of the tempering shaft 4. The mating part 2-2 is clearance-fitted with the tempering shaft 4. The mounting part 2-1 and the mating part 2-2 are connected to each other to form a step. The packing 5 is set in the mounting part 2-1. The sealing seat 2 and the tempering shaft 4 form a packing seal structure through the packing 5. In order to facilitate the extrusion of the packing 5, the inner diameter of the mounting part 2-1 is uniform.

[0020] The pressure cap 3 is placed on the end of the mounting part 2-1 away from the mating part 2-2. The pressure cap 3 is fixed to the sealing seat 2 by bolts 9 to compress the packing 5.

[0021] The outer diameter of the tempered shaft 4 is 10-180 mm, the radial labyrinth clearance e of the labyrinth seal structure 8 is 0.2-0.5 mm, and the axial labyrinth clearance f is 1.0-2.5 mm. When the outer diameter of the tempered shaft 4 is 105 mm, preferably, the radial labyrinth clearance e of the labyrinth seal structure 8 is 0.4 mm, and the axial labyrinth clearance f is 2 mm.

[0022] The sealing disc 6 is fixed to the tempering shaft 4 by the set screw 1, and the sealing seat 2 is welded to the wall panel 7.

[0023] To facilitate the replacement of packing 5, the gland 3 is a split gland. When packing 5 is worn and needs to be replaced, the gland 3 can be directly disassembled for quick replacement and maintenance.

[0024] This utility model discloses a sealing structure for the end of a tempered shaft, employing a combination of packing seal and labyrinth seal to provide dual protection, resulting in excellent sealing performance and more effectively preventing condensate leakage. The sealing disc 6 is easy to install and adjust, ensuring reliable sealing. The gland 3 is removable, allowing for easy replacement of the packing 5, thus reducing maintenance costs. The packing 5 acts as a packing seal within the sealing seat 2, while simultaneously forming a labyrinth seal between the sealing seat 2 and the sealing disc 6. When condensate passes through the labyrinth seal structure 8, it is affected by a throttling effect, effectively preventing leakage and providing a superior sealing performance.

[0025] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A sealing structure for the shaft end of a tempering shaft (4), wherein the tempering shaft (4) is rotatably connected to a wall plate (7) via a connecting component, characterized in that: The sealing structure includes packing (5), sealing seat (2), pressure cap (3), and sealing disc (6). The sealing seat (2), pressure cap (3), and sealing disc (6) are sequentially sleeved on the tempering shaft (4). The sealing disc (6) is fixedly connected to the tempering shaft (4). The sealing seat (2) is fixedly connected to the wall panel (7). The pressure cap (3) is fixedly connected to the sealing seat (2). The pressure cap (3) is clearance-fitted to the tempering shaft (4). The sealing disc (6) is interference-fitted to the tempering shaft (4). The opposite end faces of the sealing seat (2) and the sealing disc (6) interlock to form a labyrinth sealing structure (8). The labyrinth sealing structure (8) is perpendicular to the axial direction of the tempering shaft (4). (2) The inner ring has an mounting part (2-1) and a mating part (2-2). The mounting part (2-1) is located on the side away from the sealing disc (6), and the mating part (2-2) is located on the side close to the sealing disc (6). The inner diameter of the mounting part (2-1) is larger than the outer diameter of the tempering shaft (4). The mating part (2-2) is clearance-fitted with the tempering shaft (4). The mounting part (2-1) and the mating part (2-2) are connected to each other to form a step. The packing (5) is set inside the mounting part (2-1). The sealing seat (2) and the tempering shaft (4) form a packing seal structure through the packing (5). The pressure cap (3) is placed on the end of the mounting part (2-1) away from the mating part (2-2).

2. The end sealing structure of the tempered shaft (4) as described in claim 1, characterized in that: The outer diameter of the tempered shaft (4) is 10-180 mm, the radial labyrinth gap e of the labyrinth seal structure (8) is 0.2-0.5 mm, and the axial labyrinth gap f is 1.0-2.5 mm.

3. The end sealing structure of the tempered shaft (4) as described in claim 2, characterized in that: The outer diameter of the tempered shaft (4) is 105 mm, the radial labyrinth gap e of the labyrinth seal structure (8) is 0.4 mm, and the axial labyrinth gap f is 2 mm.

4. The end sealing structure of the tempered shaft (4) as described in claim 1, characterized in that: The gland (3) is fixed to the sealing seat (2) by bolts (9) to compress the packing (5).

5. The end sealing structure of the tempered shaft (4) as described in claim 1, characterized in that: The sealing disc (6) is fixed to the tempering shaft (4) by a set screw (1).

6. The end sealing structure of the tempered shaft (4) as described in claim 1, characterized in that: The sealing seat (2) is welded to the wall panel (7).

7. The sealing structure at the shaft end of the tempered shaft (4) as described in claim 1, characterized in that: The cap (3) is a split cap.

8. The end sealing structure of the tempered shaft (4) as described in claim 1, characterized in that: The inner diameter of the mounting part (2-1) is uniform.

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