CN101858433A

CN101858433A - Seawater pressure self-balancing ship deep sea sealing device

Info

Publication number: CN101858433A
Application number: CN200910030747A
Authority: CN
Inventors: 丁郁华
Original assignee: JIANGSU HUAYANG HEAVY INDUSTRIES Co Ltd
Current assignee: JIANGSU HUAYANG HEAVY INDUSTRIES Co Ltd
Priority date: 2009-04-10
Filing date: 2009-04-10
Publication date: 2010-10-13

Abstract

The invention relates to a ship sealing device, in particular to an improvement of a ship deep sea sealing device. A seawater pressure self-balancing ship deep sea sealing device comprises a pressure sealing device, an oil lubrication sealing device and a mechanical sealing device, the mechanical sealing device consists of an end surface sealing pair, a moving ring seat, a spring seat and the like, the end surface sealing pair consists of a moving ring and a stationary ring, the spring seat is fixedly connected to a transmission shaft lining, the stationary ring is fixedly connected to a ship body, an annular inner cavity is arranged in the spring seat, an axially arranged spring is installed in the inner cavity, the moving ring is arranged at one end of the moving ring seat, the other end of the moving ring seat is slidingly sleeved in the inner cavity, both ends of the spring respectively abut against the spring seat and the moving ring seat, and at least one hole is arranged on the outer surface of the spring seat and is communicated with the inner cavity. The invention can automatically balance the axial pressure of seawater acting on the moving ring seat to enable the moving ring and the stationary ring to be favorably jointed and enhance the integral sealing performance of the deep sea sealing device.

Description

Seawater pressure self-balancing ship deep sea sealing device

Technical field

The present invention relates to ship sealing device, relate in particular to the improvement of ship deep-sea sealing device.

Background technique

Deep-sea sealing device is large ocean boats and ships seal arrangements commonly used, be used to prevent that seawater from entering hull or device interior from the boats and ships transmission shaft, the quality of its sealability directly has influence on the safe operation of boats and ships, it is the important component part of boats and ships, particularly the ocean engineering operation ship needs deep-sea, 65 meters left and right sides enforcement operation under water sometimes, and is high especially to the requirement of deep-sea sealing device sealability.

When boats and ships especially ocean engineering boats and ships deep ocean work, static pressure is very big under water for it, only depend on the lubricated sealing device of oil sealing, its lip-type packing is easy to distortion, cause seal failure, so seawater pressure self-balancing ship deep sea sealing device is generally by mechanical seal device, pressurized seal device, lubricated sealing device of oil constitutes, wherein mechanical seal is that a kind of usefulness solves the device that seals between transmission shaft and the body, it relies on elastic element to moving, the pretension of stationary ring end face seal pair and reach the axial end seal arrangement of sealing, the primary element that constitutes mechanical seal has: the end face seal pair of being made up of rotating ring and stationary ring, elastic element, secondary seal, driving component, rotation preventing device and fastening piece.

Mechanical seal device is the sealing of first road, stop seawater to be invaded, lubricated sealing device of oil is the sealing of second road, stops the seawater that is leaked by mechanical seal device to enter in the ship, and the sealability of boats and ships is born jointly by mechanical seal device and lubricated sealing device of oil and guaranteed.Pressurized seal device is not worked at ordinary times, has only when other seal failure, just starts pressurized seal device, and the opening air bag is tightly encircled transmission shaft (or axle sleeve), stops seawater to enter in the ship.

In the present mechanical seal device, spring seat and transmission shaft lining are fixed together, rotating seat slidably is sleeved in the spring seat, moving ring sleeve is contained in the rotating seat, rotating ring and the stationary ring formation end face seal pair that is oppositely arranged and fits mutually with it, stationary ring is secured on the hull, be provided with the inner chamber of mounting spring in the spring seat, the spring of placing vertically is installed in the inner chamber, rotating seat is under the end thrust of spring, make the rotating ring that is sleeved in the rotating seat be close to the end face of stationary ring, thereby play seal action, because spring seat, rotating seat, rotating ring, stationary ring is the parts of sealing, thereby the outer surface of they and contact with sea water all is subjected to the pressure of seawater, wherein spring seat is owing to be fixed together with the transmission shaft lining, so spring seat is not subjected to displacement vertically, thereby there is not the effect of power to being socketed in wherein rotating seat, sealing contacts with stationary ring and the two ends of rotating ring are respectively with rotating seat, periphery wall and the contact with sea water of having only rotating ring, but the resultant pressure of suffered seawater is zero, for rotating seat, the outer surface of rotating seat and contact with sea water comprises the annular portion beyond the rotating ring periphery wall on the end face of the periphery wall (part that rotating seat is sleeved in the spring seat is disregarded) of rotating seat and socket rotating ring, wherein the resultant pressure of the suffered seawater of rotating seat periphery wall is zero, have only the direction of resultant pressure of the suffered seawater of annular portion beyond the rotating ring periphery wall opposite with the direction that the spring seat medi-spring acts on the thrust on the rotating seat, make that be sleeved on the pressure that the rotating ring in the rotating seat acts on the stationary ring end face is vertically weakened, especially in the underwater propeller of ocean engineering boats and ships, sometimes need 65 meters depths operations under water, the pressure that huge deep-water pressure will make rotating ring act on vertically on the stationary ring end face is seriously undermined, even cause mechanical seal leakage, cause major accident, even increase the contact pressure of rotating ring and stationary ring from aspects such as the [coefficient of that increases spring and number of springs, but because deep-water pressure is excessive, these measures often produce little effect, and still do not have good solution at present.

Summary of the invention

At the above-mentioned deficiency of existing in prior technology, technical problem to be solved by this invention is that a kind of seawater pressure self-balancing ship deep sea sealing device will be provided, the axial pressure of its energy autobalance seawater eroding on rotating seat, make rotating ring and stationary ring good fit, improve the overall sealing performance of deep-sea sealing device, do not need again to improve the elastic force of elastic element and increase manufacture cost, and simple in structure, manufacturing process is uncomplicated, realizes easily.

In order to solve the problems of the technologies described above, seawater pressure self-balancing ship deep sea sealing device of the present invention, comprise pressurized seal device, lubricated sealing device of oil and the end face seal pair that mainly constitutes by rotating ring and stationary ring, rotating seat and the mechanical seal device that is secured to the formations such as spring seat on the transmission shaft lining, described stationary ring is secured on the hull, be provided with the inner chamber of annular in the described spring seat, the spring of axial placement is installed in this inner chamber, one end of described rotating seat is equipped with described rotating ring, the other end of described rotating seat slidably is nested in the described inner chamber, the two ends of described spring are pressed on respectively on described spring seat and the described rotating seat, at least have a hole on the outer surface of described spring seat, and this hole is communicated with described inner chamber.

After adopting such scheme, because the outer surface of spring seat has the hole, and be communicated with the inner chamber of mounting spring in the spring seat, make the inner chamber of spring seat be communicated with and be full of seawater with seawater, seawater all produces pressure to all directions in the inner chamber, again since the internal diameter of inner chamber less than the external diameter of rotating ring, the direction of making a concerted effort of seawater eroding on each face of inner chamber is identical with the direction of spring seat inner chamber medi-spring thrust, and greater than and in contrast to seawater eroding making a concerted effort on the rotating seat outer surface, not only the phenomenon of seawater pressure weakening spring thrust is eliminated, also increase rotating seat and acted on thrust on the rotating ring, make the more closely knit applying of rotating ring and stationary ring, further improve and guarantee the sealability of whole deep-sea sealing device.Under the situation of the contact pressure that does not need too to increase dynamic and static ring, can suitably reduce the size of [coefficient of and the size and the spring seat of spring on the other hand, thereby reduce manufacture cost.

Description of drawings:

Below in conjunction with the drawings and specific embodiments seawater pressure self-balancing ship deep sea sealing device of the present invention is described in further detail.

Fig. 1 is the structural principle schematic representation that seawater pressure self-balancing ship deep sea sealing device of the present invention is applied to the sealing of ocean engineering boats and ships electric plating propulsion transmission shaft.

Embodiment

Among Fig. 1, seawater pressure self-balancing ship deep sea sealing device of the present invention is made of lubricated sealing device of oil 11, pressurized seal device 10 and mechanical seal device, and wherein mechanical seal device is installed near propeller cavitation one side, in the middle of pressurized seal device 10 is installed in.The end face seal pair that mechanical seal device mainly is made of rotating ring 8 and stationary ring 9, spring seat 2, spring 5, rotating seat 6, secondary seal 7 etc. constitute.

Transmission shaft lining 1 is fixedly connected and be wrapped in the outer surface of transmission shaft 12, spring seat 2 is fixedly attached on the transmission shaft lining 1, be provided with the inner chamber 4 of annular in the spring seat 2, one end of rotating seat 6 slidably is socketed in the inner chamber 4 of spring seat 2, the other end of rotating seat 6 is set with rotating ring 8, the periphery wall upper edge of rotating ring 8 circumferentially is evenly equipped with 6 axial locating slots, be evenly equipped with 6 positioning screw holes on the periphery wall corresponding position of rotating seat 6, enter (locating slot among the figure in the locating slot on rotating ring 8 periphery walls behind the positioning screwn screw-in positioning screw hole, positioning screw hole, positioning screwn does not all draw), rotating ring 8 and rotating seat 6 are not relatively rotated, thereby rotating ring 8 is passed in the torque of transmission shaft 12.The seal face of stationary ring 9 is the plane, and be fixedly connected on the pressurized seal device 10, pressurized seal device 10 is fixedly attached on the hull, the seal face of rotating ring 8 is the plane, and and fit with the seal face that stationary ring 9 that rotating ring 8 is oppositely arranged is the plane, rotating ring 8 and stationary ring 9 constitute the end face seal pair, a secondary seal 7 is installed between the inner circle wall of the periphery wall of rotating ring 8 and rotating seat 6, this secondary seal 7 is rubber " O " type circle, be used for stoping the slot between seawater driven torus 8 and the rotating seat 6 to bleed, the spring 5 that the edge circumferentially evenly is equipped with 12 performances unanimities and axially places in the ringwise inner chamber 4 between rotating seat 6 and the spring seat 2, the two ends of spring 5 are pressed on respectively on spring seat 2 and the rotating seat 6, make the seal face of rotating ring 8 be close to vertically on the seal face of stationary ring 9 under the elastic force effect of spring 5, rotating ring 8 adopts macromolecular material to make.Be processed with circumferentially uniform hole 3, four edges on the outer surface of spring seat 2 and contact with sea water, this hole 3 is communicated with the inner chamber 4 of mounting spring 5 in the spring seat 2.When electric plating propulsion is operated in the deep-sea, seawater enters in the inner chamber 4 of spring seat 2 by hole 3, because the external diameter of rotating ring 8 is greater than the internal diameter of inner chamber 4 in the spring seat 2, thereby the seawater eroding in the inner chamber 4 on the rotating seat 6 and the end thrust of pointing to stationary ring 9 greater than seawater eroding on rotating seat 6 outer surfaces and direction point to the resultant pressure of spring seats 2 vertically by rotating ring 8, so act on the rotating ring 8 and the increase of making a concerted effort to obtain that point to stationary ring 9, more help rotating ring 8 and stationary ring 9 fits tightly, further improve and guarantee the sealability of whole deep-sea sealing device.

Above-mentioned mode of execution only is the present invention's one of mode of execution preferably, and wherein the quantity in hole not only is confined to four on the rotating seat outer surface, can also be two or six or eight, and is distributed on the outer surface of rotating seat; These changes all fall among the protection of seawater pressure self-balancing ship deep sea sealing device of the present invention.

Claims

1. seawater pressure self-balancing ship deep sea sealing device, comprise pressurized seal device (10), lubricated sealing device of oil (11) and the end face seal pair that mainly constitutes by rotating ring (8) and stationary ring (9), rotating seat (6) and be secured to the mechanical seal device that spring seat (2) on the transmission shaft lining (1) etc. constitutes, described stationary ring (9) is secured on the hull, be provided with the inner chamber (4) of annular in the described spring seat (2), the spring (5) of axial placement is installed in this inner chamber (4), one end of described rotating seat (6) is equipped with described rotating ring (8), the other end of described rotating seat (6) slidably is nested in the described inner chamber (4), the two ends of described spring (5) are pressed on respectively on described spring seat (2) and the described rotating seat (6), it is characterized in that: have a hole (3) on the outer surface of described spring seat (2) at least, and this hole (3) are communicated with described inner chamber (4).

2. seawater pressure self-balancing ship deep sea sealing device according to claim 1 is characterized in that: described hole (3) are along the uniform distribution of outer surface of described spring seat (2).

3. seawater pressure self-balancing ship deep sea sealing device according to claim 1 is characterized in that: the outer surface of described spring seat (2) is along circumferentially being evenly equipped with four holes (5).

4. seawater pressure self-balancing ship deep sea sealing device according to claim 1 is characterized in that: the outer surface of described spring seat (2) is along circumferentially being evenly equipped with six holes (5).