A drive shaft compartment stuffing box

Abstract

This utility model provides a stuffing box for a drive shaft system compartment, belonging to the field of drive shaft sealing technology. The stuffing box for a drive shaft system compartment includes a base; the stuffing box body is fixed to the flange end face of the base body. The stuffing box body includes at least two panel stuffing portions that are coaxially disposed between the inner side of the panel and the outer wall of the drive shaft and are connected to the end face of the base body and cooperate with the drive shaft, for circumferential sealing of the drive shaft; a stuffing gland is fixedly disposed at the end of the stuffing box body away from the base body. The end of the base body is provided with a seat plate flange, and the panel is connected to the seat plate flange connection surface of the base body by a first bolt. By coaxially arranging the drive shaft, stuffing portions, panel, and stuffing gland, this utility model allows the panel to fix the stuffing portion to the outside of the drive shaft from the radial direction, and the stuffing gland to fix the stuffing portion from the axial direction. This ensures that the stuffing portion that provides the sealing effect is perpendicularly and tightly fitted to the drive shaft, thereby improving the installation sealing performance of the stuffing box.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft sealing technology, specifically to a transmission shaft compartment stuffing box. Background Technology

[0002] Stuffing boxes for ship drive shaft systems are critical sealing devices used in ships and submarines to seal shafts, rods, cables, and other components that pass through watertight (or fireproof) compartments. Their core function is to ensure the original watertightness, airtightness, or fire resistance of the compartment as components pass through it. A typical stuffing box for a drive shaft system consists of a main housing, sealing material, and a clamping device. The main housing is usually fixed to the compartment wall and has a central through-hole for the shaft / rod to pass through, providing structural support. The sealing material primarily seals the shaft / rod. The clamping device compresses the sealing material to withstand wear or vibration.

[0003] Currently, for bulkhead stuffing boxes used in marine transmission systems, installation must ensure a close fit with the drive shaft to guarantee the stuffing box's sealing function regardless of shaft operation. Simultaneously, it must meet requirements for compact structure and light weight to minimize impact on the ship's space and weight. However, due to design constraints of the ship's propulsion shafting and the need for proper shaft alignment, the sealing material in the stuffing box may not be able to maintain a perpendicular and tight fit with the drive shaft, resulting in poor sealing performance of existing stuffing box installation structures. Utility Model Content

[0004] This utility model provides a stuffing box for a drive shaft system, which ensures that the stuffing part that provides a sealing effect is in close vertical contact with the drive shaft passing through the watertight chamber wall, thereby improving the installation sealing performance of the stuffing box.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A stuffing box for a drive shaft system, comprising:

[0007] seat body;

[0008] The stuffing box body is fixed to the flange end face of the seat body, and the stuffing box body includes at least two panels that are oppositely disposed on the end face of the seat body and cooperate with the drive shaft.

[0009] A packing section, coaxially disposed between the inner side of the panel and the outer wall of the drive shaft, is used for circumferential sealing of the drive shaft; and

[0010] A packing gland is fixedly installed at the end of the stuffing box body away from the seat.

[0011] Preferably, the end of the seat body is provided with a seat plate flange.

[0012] Preferably, the panel is connected to the seat plate flange connection surface of the seat body by a first bolt.

[0013] Preferably, the panel includes a plate that mates with the base, a through hole on the plate that mates with the drive shaft, and a flange on the mating surface of the plate.

[0014] Preferably, the flanges on two adjacent plates are fixed together by a second bolt.

[0015] Preferably, the packing section includes a packing seat disposed circumferentially along the through hole on the inner side of the plate near one end of the seat, an oil distribution ring disposed on one end of the packing seat away from the seat, and packing disposed on both sides of the oil distribution ring, wherein the inner side of the packing gland abuts against the packing on the outer side of the axial direction.

[0016] Preferably, the packing gland includes at least two caps arranged circumferentially opposite each other along the through hole, and the caps are fixed to the side wall of the plate by a third bolt.

[0017] Preferably, two adjacent covers are fixed together by a fourth bolt.

[0018] Preferably, the outer wall of the packing gland is provided with an oil cup.

[0019] As can be seen from the above technical solutions, this utility model has the following beneficial effects:

[0020] 1. In this utility model, two panels are fixedly connected to the flange end face of the base body. The packing part forms a sealing structure between the outer wall of the drive shaft and the inner side wall of the panel. Finally, the packing gland is used to fix the packing part axially. Since the drive shaft, packing part, panel and packing gland are coaxially arranged, the panel can fix the packing part to the outside of the drive shaft radially, and the packing gland can fix the packing part axially. This ensures that the packing part that plays a sealing role is perpendicular and tightly fitted to the drive shaft, thereby improving the installation sealing performance of the compartment stuffing box.

[0021] 2. In this utility model, the packing part includes a packing seat, an oil distribution ring, and packing. The packing seat is arranged circumferentially along the through hole and is located on the inner side of the plate body near the seat. The oil distribution ring is located on the outer side of the packing seat away from the seat. The packing is arranged on both sides of the oil distribution ring. The packing seat, oil distribution ring, and packing are all distributed sequentially along the outer side of the drive shaft and are located between the outer side of the drive shaft and the inner side of the plate body. The inner side of the packing gland abuts against the packing on the outer side of the axial direction. In this way, the packing seat, oil distribution ring, and packing form a sealing structure between the outer side of the drive shaft and the inner side of the plate body, and are fixed by the packing gland. The packing part can be stably fixed between the drive shaft and the plate body to ensure the sealing performance of the packing gland of the compartment. Attached Figure Description

[0022] Figure 1 A front view of the compartment stuffing box provided by this utility model;

[0023] Figure 2 A side view of the compartment stuffing box provided by this utility model;

[0024] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0025] In the diagram: 10, seat body; 110, seat plate flange; 210, panel; 211, plate body; 212, through hole; 213, flange; 214, second bolt; 220, first bolt; 30, drive shaft; 410, packing seat; 420, oil distribution ring; 430, packing; 50, packing gland; 510, cover body; 520, third bolt; 530, fourth bolt; 60, oil cup. Detailed Implementation

[0026] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: (Refer to...) Figure 1 , Figure 2 A stuffing box for a drive shaft system is disclosed. The stuffing box is connected to the drive shaft 30 of a ship's drive system. Further, the stuffing box includes a base 10, a stuffing box body, a stuffing section, and a stuffing gland 50. A base flange 110 is provided at the end of the base 10. It should be noted that the base flange 110 and the base 10 are a single part, i.e., they are an integral structure. The stuffing box body is fixed to the end face of the base flange of the base 10. Further, the stuffing box body includes at least two panels 210. Specifically, in this embodiment, there are two panels 210, which are positioned opposite each other at the end face of the base 10. The two panels, after being joined, cooperate with the drive shaft 30. Meanwhile, the stuffing section is... The shaft is located between the inner side of the panel 210 and the outer wall of the drive shaft 30, and is used to circumferentially seal the drive shaft 30. The packing gland is fixedly located at the end of the stuffing box body away from the seat 10. In use, the two panels are fixedly connected to the flange end face of the seat body. The packing part forms a sealing structure between the outer wall of the drive shaft and the inner side wall of the panel, and finally the packing gland is used to fix the packing part axially. Since the drive shaft, packing part, panel and packing gland are coaxially arranged, the panel can fix the packing part to the outside of the drive shaft radially, and the packing gland can fix the packing part axially. This ensures that the packing part that plays a sealing role is perpendicular and tightly fitted to the drive shaft, so as to improve the installation sealing performance of the compartment stuffing box.

[0028] Furthermore, due to the simple structure of the stuffing box, it is easy to install and disassemble, thus allowing the intermediate drive shaft to be easily removed without dismantling the mud pump and gearbox.

[0029] Reference Figure 1 As a preferred technical solution in this embodiment, in order to achieve a stable connection between the panel 210 and the base 10, the panel 210 is connected to the connecting surface of the base plate flange 110 of the base 10 by the first bolt 220. It should be noted that the base plate flange 110 has evenly distributed flange holes, and correspondingly, the panel 210 has corresponding flange holes. During installation, the first bolt passes through the flange holes on the base plate flange 110 and the panel 210 respectively, and is finally fixed by nuts.

[0030] Furthermore, the panel 210 includes a plate 211, a through hole 212, and a flange 213. The plate 211 is configured to cooperate with the base 10. The through hole 212 is provided on the plate and cooperates with the drive shaft. The flange 213 is provided on the mating surface of the plate. It should be noted that since there are two panels in this embodiment, the plate is a structure corresponding to the size of one side of the base. In this embodiment, the through hole is a semi-circular hole, and the flange is a strip structure provided on the mating end face of the plate. In order to achieve stable docking of the two plates, the flanges 213 on the two adjacent plates 211 are fixedly connected by second bolts 214. That is, corresponding flange holes are opened on the flanges. After the second bolts pass through the flange holes of the mating flanges, the connection is achieved by nuts.

[0031] Reference Figure 2 , Figure 3 In some embodiments, the packing section includes a packing seat 410, an oil distribution ring 420, and packing 430. The packing seat 410 is arranged circumferentially along the through hole 212 and is located at the end of the inner side of the plate 211 near the seat 10. The oil distribution ring 420 is arranged at the end of the packing seat away from the seat 10, and the packing 430 is arranged on both sides of the oil distribution ring. It should be noted that the packing seat, oil distribution ring, and packing are all distributed sequentially along the outer axial direction of the drive shaft and are located between the outer side of the drive shaft and the inner side of the plate. The inner side of the packing gland 50 is in contact with the packing on the outer side of the axial direction. In this way, the packing seat, oil distribution ring, and packing form a sealing structure between the outer side of the drive shaft and the inner side of the plate, and are fixed by the packing gland.

[0032] Furthermore, refer to Figure 1The packing gland 50 includes at least two cover bodies 510 arranged circumferentially opposite each other along the through hole 212. Specifically, in this embodiment, there are two cover bodies 510. The mating surfaces of the two cover bodies are perpendicular to the mating surfaces of the two plates. After mating, the cover bodies 510 are fixed to the side wall of the plate 211 by a third bolt 520. That is, a flange hole is opened in the circumferential side wall of the cover body, and the third bolt passes through the flange hole and is fixed to the plate.

[0033] Furthermore, in order to achieve a stable connection between two adjacent covers 510, a fourth bolt 530 is used to fix the two adjacent covers 510 together. That is, a corresponding flange hole is opened on the mating surface of the cover. After the fourth bolt passes through the flange hole of the mating cover, the connection is achieved by using a nut.

[0034] Furthermore, the outer wall of the packing gland 50 is provided with an oil cup 60, which facilitates the delivery of lubricating grease into the packing gland of the compartment.

[0035] In use, the two panels 210 are fixedly connected to the flange end face of the base 10. The packing part forms a sealing structure between the outer wall of the drive shaft 30 and the inner side wall of the panel 210. Finally, the packing part is fixed axially by the packing gland 50. Since the drive shaft 30, the packing part, the panel 210 and the packing gland 50 are coaxially arranged, the panel 210 can fix the packing part to the outside of the drive shaft 30 radially, and the packing gland 50 can fix the packing part axially. This ensures that the packing part that provides the sealing effect is perpendicularly and tightly fitted to the drive shaft, thereby improving the installation sealing performance of the compartment stuffing box.

[0036] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A stuffing box for a drive shaft system, characterized in that, include: base(10); The stuffing box body is fixed on the flange end face of the seat (10). The stuffing box body includes at least two panels (210) that are disposed opposite to each other on the end face of the seat and cooperate with the drive shaft (30). A packing section, coaxially disposed between the inner side of the panel (210) and the outer wall of the drive shaft (30), is used to circumferentially seal the drive shaft (30); and A packing gland (50) is fixedly disposed at the end of the packing gland body away from the seat (10).

2. The stuffing box for the drive shaft system according to claim 1, characterized in that, The end of the seat (10) is provided with a seat plate flange (110).

3. The stuffing box for the transmission shaft system according to claim 2, characterized in that, The panel (210) is connected to the seat plate flange (110) connection surface of the seat body (10) by the first bolt (220).

4. The stuffing box for the transmission shaft system according to claim 1, characterized in that, The panel (210) includes a plate (211) that mates with the base (10), a through hole (212) provided on the plate and mates with the drive shaft, and a flange (213) provided on the mating surface of the plate.

5. The stuffing box for the transmission shaft system according to claim 4, characterized in that, The flanges (213) on two adjacent plates (211) are fixed together by the second bolt (214).

6. The stuffing box for the drive shaft system according to claim 4, characterized in that, The packing section includes a packing seat (410) disposed circumferentially along the through hole (212) on the inner side of the plate (211) near the end of the seat (10), an oil distribution ring (420) disposed on the end of the packing seat away from the seat (10), and packing (430) disposed on both sides of the oil distribution ring. The inner side of the packing gland (50) abuts against the packing on the outer side of the axial direction.

7. The stuffing box for the transmission shaft system according to claim 4, characterized in that, The packing gland (50) includes at least two caps (510) arranged circumferentially opposite each other along the through hole (212), and the caps (510) are fixed to the side wall of the plate (211) by a third bolt (520).

8. The stuffing box for the drive shaft system according to claim 7, characterized in that, The two adjacent covers (510) are fixed together by a fourth bolt (530).

9. The stuffing box for the drive shaft system according to claim 1, characterized in that, The outer wall of the packing gland (50) is provided with an oil cup (60).

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