CN212616301U

CN212616301U - Sealing device for water-jet propeller shaft

Info

Publication number: CN212616301U
Application number: CN202020884390.4U
Authority: CN
Inventors: 曹云鹏; 邹豪; 都森欣; 关键; 胡益军; 蔡昌莎; 卓梓聿; 陆晶妮; 裘明权
Original assignee: Lopland Machinery & Equipment Ningbo Co ltd
Current assignee: Lopland Machinery & Equipment Ningbo Co ltd; Roplan Machinery Ningbo Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-02-26
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a sealing device for a water-jet propeller shaft, which comprises a movable ring component, a static ring seat flange and a mounting flange, wherein the static ring component comprises a static ring and a static ring seat, the static ring seat is provided with a second mounting groove, and one end of the static ring is hermetically arranged in the second mounting groove; the tail end of the static ring seat is assembled on the static ring seat flange in an axially slidable manner, the inner side of the tail end of the static ring seat is provided with a limiting flange, the limiting flange axially extends through an inner hole of the static ring seat flange, and a sealing ring is arranged between the outer side wall of the limiting flange and the inner hole wall of the static ring seat flange; an elastic compensation component is arranged between the tail end of the static ring seat and the flange of the static ring seat; a lip seal is arranged at one end of the inner side of the mounting flange close to the static ring seat flange, the outer ring of the lip seal is mounted on the mounting flange, and the inner ring of the lip seal is sleeved and matched outside the rotating shaft. The utility model discloses a sealing device for water jet propeller shaft can guarantee stable, reliable sealing performance to easy dismounting.

Description

Sealing device for water-jet propeller shaft

Technical Field

The utility model relates to a mechanical seal technical field specifically is a sealing device for water jet propeller shaft.

Background

The water jet propeller is a new type of propulsion tool for ship, and is used together with ship power device to propel ship. The water jet propeller is a propeller in which the jet part of the propulsion mechanism is immersed in water and the reaction force generated by the jet water flow is used to drive the ship to advance. The ship is composed of a water pump, a pipeline, a suction port, a nozzle and the like, and the operation of the ship can be realized by changing the jet direction of water flow through the nozzle. The water jet propeller is powered by water pump to suck water from the bottom hole of ship and discharge water from the back of ship via the side pipe to propel the ship by the reaction force of water.

The shaft seal of the traditional ship propeller has the following forms, one is the mechanical seal of a rubber corrugated pipe; one is a single 3 or 4 lip seal; one is a conventional stuffing seal.

The conventional seal described above has the following drawbacks:

1. traditional rubber bellows mechanical seal, rubber bellows have ageing cycle, and when changing sealed, need wholly change together, and cost of maintenance is high. The sealing performance decreases with the aging of the bellows.

2. The single 3-channel and 4-channel lip seals are suitable for low-rotating-speed shafts (the general rotating speed of the water jet propeller is very high), and the service life is short.

3. The traditional packing is sealed, the leakage amount is large, the service life is short, and the consumed shaft power is large.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the mechanical seal for the water-jet propeller shaft can overcome at least one defect in the defects of the traditional mechanical seal, is convenient to disassemble and assemble, and has stable and reliable sealing performance.

The utility model adopts the technical proposal that: the sealing device for the shaft of the water-jet propeller comprises a movable ring assembly, a static ring seat flange and a mounting flange which are sequentially sleeved outside a rotating shaft, wherein a sealing surface of the movable ring assembly is attached to a sealing surface of the static ring assembly to form a sealing ground surface; one end of the static ring seat, which is far away from the static ring, is assembled on a static ring seat flange in an axially slidable manner, the inner side of the tail end of the static ring seat is provided with a limiting flange, the limiting flange axially extends through an inner hole of the static ring seat flange, and a sealing ring is arranged between the outer side wall of the limiting flange and the inner hole wall of the static ring seat flange; an elastic compensation component is arranged between the tail end of the static ring seat and the static ring seat flange; a lip seal is arranged at one end, close to the static ring seat flange, of the inner side of the mounting flange, an outer ring of the lip seal is mounted on the mounting flange, and an inner ring of the lip seal is sleeved and matched outside the rotating shaft.

Compared with the prior art, the utility model has the following advantage:

1. in the structure, the main seal formed by the movable ring component and the fixed ring component seals seawater, and the lip seal is also arranged at the same time, so that silt in seawater can be prevented from entering a grinding surface of the main seal, the grinding surface and the sealing ring are effectively protected from being abraded, and the service life is prolonged;

2. the tail end of the static ring seat is also provided with a limiting flange, the limiting flange axially extends through an inner hole of a flange of the static ring seat, and a corresponding sealing ring is arranged between the limiting flange and the inner hole wall of the flange of the static ring seat to form a corresponding sealing point, so that seawater is effectively prevented from entering a cabin body;

3. the elastic compensation element in the structure is not contacted with seawater, so that the elastic element is prevented from being corroded, the compensation stability is effectively improved, and the service life is prolonged; the static ring compensation mode is adopted in the sealing structure, so that the compensation element is arranged to not rotate along with the rotating shaft, the compensation acting force is more stable, and the stability of the sealing performance is ensured.

Furthermore, the movable ring assembly comprises a movable ring and a movable ring seat, a first mounting groove is formed in the movable ring seat, and one end of the movable ring is assembled in the first mounting groove; a sealing ring is arranged between the outer side wall of the movable ring and the inner side wall of the first mounting groove; the outer side wall of the movable ring seat is uniformly provided with a plurality of radially extending driving screws along the circumferential direction, and the end parts of the driving screws are tightly matched outside the rotating shaft so as to realize the driving connection of the movable ring component and the rotating shaft.

As an improvement, the inner hole wall of the movable ring seat is provided with a containing groove, the containing groove is internally provided with an annular sleeve provided with a notch, the annular sleeve is sleeved outside the rotating shaft, and the end parts of the plurality of driving screws are tightly fixed on the outer side wall of the annular sleeve. In the structure, the movable ring seat is in shaft transmission through the annular sleeve, so that the driving screw is prevented from directly acting on a motor shaft to damage the shaft.

And a sealing ring is arranged between one end of the movable ring close to the movable ring seat and the bottom of the first mounting groove. In this structure, except that setting up the sealing washer between the lateral wall of rotating ring and the first mounting groove inside wall, still set up the sealing washer between rotating ring tail end and first mounting groove bottom for rigid contact has been avoided between rotating ring and the rotating ring seat, reduces to cause the friction surface deformation to the rotating ring when the rotating shaft orders about the rotating ring seat operation, guarantees sealing performance, can also improve sealed life simultaneously.

And the static ring seat is provided with a third mounting groove on the flange, the static ring seat is assembled in the third mounting groove in a sliding manner, and the elastic compensation component is arranged between the bottom of the third mounting groove and the tail end of the static ring seat.

Preferably, the elastic compensation assembly comprises a plurality of small springs, a plurality of spring holes are formed in the bottom of the third mounting groove along the circumferential direction, one ends of the small springs are matched in the spring holes, and the other ends of the small springs abut against the tail end of the static ring seat. A plurality of small springs which are uniformly arranged are used as compensation elements, so that the elastic compensation force is more uniform and stable.

Drawings

Fig. 1 is a cross-sectional view of a sealing device for a water jet propeller shaft of the present invention.

Fig. 2 is a structural diagram of a stationary ring seat flange in the present invention.

Fig. 3 is an enlarged view at X in fig. 1.

Fig. 4 is a structural view of the ring housing of the present invention.

The device comprises a mounting flange 1, a static ring seat flange 2, a third mounting groove 2.1, a spring hole 2.2, a lip seal 3, a moving ring 4, a moving ring seat 5, a first mounting groove 5.1, a containing groove 5.2, a driving screw 6, an annular sleeve 7, a static ring 8, a static ring seat 9, a second mounting groove 9.1, a limiting flange 9.2, a small spring 10, an anti-rotation pin 11 and a rubber sleeve 12.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

In the description of the present invention, it should be noted that the terms "tail end", "inner side", "outer ring", "inner ring", "outer side wall", "inner hole wall", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, the terms "first", "second" and "third" are used for convenience of description and distinction, and do not have any specific meaning.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "fitted" are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the sealing device for a water-jet propeller shaft provided by the utility model comprises a rotating ring component, a static ring seat flange 2 and a mounting flange 1 which are sequentially sleeved outside a rotating shaft, wherein a sealing surface of the rotating ring component is attached to a sealing surface of the static ring component to form a sealing ground surface; specifically, a plurality of connecting bolts 13 are arranged on the mounting flange 1 along the circumferential direction and used for being connected and fixed with the cabin body, and a plurality of fixing bolts 14 are arranged on the stationary ring seat flange 2 along the circumferential direction and used for fixedly connecting the stationary ring seat flange 2 to the mounting flange 1.

The static ring component comprises a static ring 8 and a static ring seat 9, a second installation groove 9.1 is arranged on the static ring seat 9, one end of the static ring 8 is hermetically assembled in the second installation groove 9.1, and a corresponding sealing ring is arranged between the outer side wall of the static ring 8 and the inner side wall of the second installation groove 9.1 to realize sealing connection; in addition, still be equipped with the sealing washer between the tail end of quiet ring 8 and the bottom of second mounting groove 9.1, make the cooperation of quiet ring 8 and quiet ring holder 9 flexible after setting up like this, do not have the contact point of rigidity to guarantee when sealed mill face moves, can not lead to the rigidity contact point between quiet ring 8 and the quiet ring holder 9 to take place to damage because of the action of friction with quiet ring 8 terminal surface of rotating ring subassembly down, improve sealed life.

On the other hand, still be equipped with on stationary ring seat 9 and wear to establish the anti-rotating pin 11 in second mounting groove 9.1 to the outside cover of anti-rotating pin 11 is equipped with rubber sleeve 12, is equipped with corresponding anti-rotating keyway on stationary ring 8, and rubber sleeve 12 sets up and has avoided anti-rotating pin 11 and the direct hard contact of anti-rotating keyway, prevents that stationary ring 8 from taking place cracked in anti-rotating keyway department, improves life.

In addition, in this structure, the one end that deviates from stationary ring 8 at stationary ring seat 9 is along the slidable dress of axial on stationary ring seat flange 2, and stationary ring seat 9 tail end inboard is equipped with spacing flange 9.2, and spacing flange 9.2 extends the hole of stationary ring seat flange 2 along the axial, and is equipped with the sealing washer between the interior pore wall of this spacing flange 9.2 lateral wall and stationary ring seat flange 2.

An assembly groove 1.1 is arranged at one end of the inner side of the mounting flange 1 close to the static ring seat flange 2, a lip seal 3 is arranged in the assembly groove 1.1, the outer ring of the lip seal 3 is accommodated in the assembly groove 1.1, and the inner ring of the lip seal 3 is sleeved and matched outside the rotating shaft. Specifically, be equipped with third mounting groove 2.1 on the quiet ring seat flange 2, quiet ring seat 9 sliding fit is in third mounting groove 2.1, and the elastic compensation subassembly is established between third mounting groove 2.1 bottom and quiet ring seat 9 tail ends. In this embodiment, the elastic compensation assembly includes a plurality of small springs 10, a plurality of spring holes 2.2 are circumferentially arranged at the bottom of the third mounting groove 2.1, one ends of the plurality of small springs 10 are fitted in the spring holes 2.2, and the other ends of the plurality of small springs are abutted against the tail end of the stationary ring seat 9. In this structure, in order to improve the compression stability of the small spring 10, a corresponding accommodating hole may be provided at the tail end of the stationary ring seat 9 for the other end of the small spring 10 to cooperate.

In this embodiment, the rotating ring assembly includes a rotating ring 4 and a rotating ring seat 5, a first mounting groove 5.1 is provided on the rotating ring seat 5, one end of the rotating ring 4 is fitted in the first mounting groove 5.1, and a seal ring is provided between the outer side wall of the rotating ring 4 and the inner side wall of the first mounting groove 5.1; the outer side wall of the moving ring seat 5 is uniformly provided with a plurality of driving screws 6 which extend along the radial direction along the circumferential direction, and the end parts of the driving screws 6 are tightly matched outside the rotating shaft so as to realize the driving connection of the moving ring component and the rotating shaft. More specifically, a containing groove 5.2 is formed in the inner hole wall of the movable ring seat 5, an annular sleeve 7 is arranged in the containing groove 5.2, as shown in fig. 4, a notch 7.1 is formed in the annular sleeve 7, so that the annular sleeve 7 is easy to deform when being subjected to the action of a radial external force, the outer ring of the annular sleeve 7 is matched in the containing groove 5.2, the inner ring of the annular sleeve 7 is sleeved outside the rotating shaft, the end portions of the plurality of driving screws 6 are tightly fixed on the outer side wall of the annular sleeve 7, the radial shrinkage of the annular sleeve 7 is tightly held outside the rotating shaft by screwing the driving screws 6, and the driving connection of the movable ring seat 5 and the rotating shaft is realized.

Preferably, a sealing ring is arranged between one end of the movable ring 4 close to the movable ring seat 5 and the bottom of the first mounting groove 5.1. Rigid contact between the movable ring 4 and the movable ring seat 5 is avoided, friction surface deformation of the movable ring caused by operation of the movable ring seat 5 driven by the rotating shaft is reduced, sealing performance is guaranteed, and meanwhile the service life of sealing can be prolonged. In the structure, an anti-rotation pin 11 extending to the first mounting groove 5.1 is also arranged on the rotating ring seat 5, a corresponding anti-rotation pin groove is arranged on the rotating ring 4, and a rubber sleeve 12 is sleeved outside the anti-rotation pin 11, so that the direct hard contact between the anti-rotation pin 11 and the anti-rotation pin groove is avoided.

As shown in fig. 1, still be equipped with constant head tank 9.3 on the lateral wall of stationary ring seat 9, be equipped with a plurality of locating pieces 15 through positioning bolt 16 detachable at the nearly stationary ring seat 9 side end face of stationary ring seat flange 2, and locating piece 15 can rotate around set screw 16, after the cooperation of stationary ring subassembly is on stationary ring seat flange 2, the cooperation of the one end that rotation locating piece 15 made it keep away from positioning bolt 16 is in constant head tank 9.3, screw up positioning bolt 16, make stationary ring subassembly and stationary ring seat flange pre-installation be collection dress formula stationary ring subassembly, and, guarantee this moment that the elasticity compensation assembly in the stationary ring subassembly is located working height.

While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a water jet propulsion is sealing device for axle, establishes at outside rotating ring subassembly, quiet ring seat flange (2) and mounting flange (1) of pivot including establishing in proper order, the sealed face of sealing of rotating ring subassembly and the sealed face of quiet ring subassembly are laminated mutually and are formed sealed mill face, its characterized in that: the static ring component comprises a static ring (8) and a static ring seat (9), a second mounting groove (9.1) is formed in the static ring seat (9), and one end of the static ring (8) is hermetically assembled in the second mounting groove (9.1); one end of the static ring seat (9) departing from the static ring (8) is assembled on the static ring seat flange (2) in an axially slidable manner, a limiting flange (9.2) is arranged on the inner side of the tail end of the static ring seat (9), the limiting flange (9.2) axially extends through an inner hole of the static ring seat flange (2), and a sealing ring is arranged between the outer side wall of the limiting flange (9.2) and the inner hole wall of the static ring seat flange (2); an elastic compensation component is arranged between the tail end of the static ring seat (9) and the static ring seat flange (2); the one end of the inboard nearly quiet ring seat flange (2) of mounting flange (1) is equipped with lip seal (3), the outer lane of lip seal (3) is installed on mounting flange (1), and the inner circle suit cooperation of lip seal (3) is outside the pivot.

2. The sealing device for a water jet propeller shaft according to claim 1, wherein: the movable ring assembly comprises a movable ring (4) and a movable ring seat (5), a first mounting groove (5.1) is formed in the movable ring seat (5), and one end of the movable ring (4) is assembled in the first mounting groove (5.1); a sealing ring is arranged between the outer side wall of the movable ring (4) and the inner side wall of the first mounting groove (5.1); evenly be equipped with a plurality of radial extension's drive screw (6) along circumference on rotating ring seat (5) lateral wall, the tip tight fit of drive screw (6) is outside the pivot for realize the drive connection of rotating ring subassembly and pivot.

3. The sealing device for a water jet propeller shaft according to claim 2, wherein: be equipped with storage tank (5.2) on the inner hole wall of rotating ring seat (5), storage tank (5.2) in be equipped with annular cover (7) of opening a breach (7.1), annular cover (7) cover is established in the pivot outside, and is a plurality of the tip of drive screw (6) is fastened on the lateral wall of annular cover (7).

4. The sealing device for a water jet propeller shaft according to claim 2 or 3, wherein: and a sealing ring is arranged between one end of the movable ring (4) close to the movable ring seat (5) and the bottom of the first mounting groove (5.1).

5. The sealing device for a water jet propeller shaft according to claim 1, wherein: be equipped with third mounting groove (2.1) on quiet ring seat flange (2), quiet ring seat (9) sliding fit is in third mounting groove (2.1), the elastic compensation subassembly is established between third mounting groove (2.1) bottom and quiet ring seat (9) tail end.

6. The sealing device for a water jet propeller shaft according to claim 5, wherein: elasticity compensation assembly include a plurality of little springs (10), the bottom of third mounting groove (2.1) is equipped with a plurality of spring holes (2.2) along circumference, and is a plurality of the one end cooperation of little spring (10) is in spring hole (2.2), and the other end top leans on the tail end of stationary ring seat (9).