A three-stage waterproof structure for shipboard turntable narrow space multi-level surge protection

Abstract

The application discloses a three-stage waterproof structure for shipborne rotary table in narrow space and multi-level surge protection, belongs to the technical field of relative rotating equipment such as rotary table and ball machine on sea and river carriers, and relates to a three-stage waterproof structure for shipborne rotary table in narrow space and multi-level surge protection. The shipborne rotary table comprises an azimuth flange and an azimuth shell, the three-stage waterproof structure is arranged in a gap between the azimuth flange and the azimuth shell, and comprises a slice, a graphite ring, a friction ring, annular grooves a and b on the azimuth shell, annular bosses a and b on the azimuth flange, the slice is sleeved on the outer circumferential surface of the annular groove a, the annular boss a is located above the slice, the annular boss b is located in the annular groove a, a lower end surface of the azimuth flange forms an annular space on the inner side of the gap, the friction ring is installed in the annular space, and the graphite ring is installed in the annular groove b and is pressed against the lower surface of the friction ring. The three-stage waterproof structure can realize waterproof sealing and reduce the installation space of the rotary table.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of marine, river transport carrier upper rotating platform, ball machine and other relative rotating equipment, and particularly relates to a three-stage waterproof structure for marine rotating platform in narrow space and multi-level surge protection. BACKGROUND

[0002] Marine, river transport carrier upper rotating platform, ball machine and other relative rotating equipment often have waterproof sealing requirements, so as to isolate the equipment from seawater or river water corrosion and ensure that the equipment can complete its functions through rotation.

[0003] In order to meet the requirements of use on the sea or river, a waterproof sealing device is usually added to the relative rotating part. This device is roughly divided into two categories. One can only prevent rain from entering from top to bottom. The other can prevent seawater or river water from entering from bottom to top due to the rebound of the deck or other flat structures on the ship caused by the impact of seawater or river water. The limitation of the first type is that the device must be installed high to prevent seawater or river water from washing the equipment when it impacts the deck. The second type uses a sealing ring and shaft friction to prevent seawater or river water from entering the interior. However, this method often has a large friction or requires a large installation space, resulting in a large power loss of the equipment to overcome the additional friction, the selection of a large power drive motor, and a large equipment size. SUMMARY

[0004] Therefore, the present application provides a three-stage waterproof structure for marine rotating platform in narrow space and multi-level surge protection, which adopts a multi-level waterproof structure to achieve waterproof sealing and reduce the installation space of the rotating platform.

[0005] The present application is achieved by the following technical solutions:

[0006] A three-stage waterproof structure for marine rotating platform in narrow space and multi-level surge protection, the marine rotating platform includes an azimuth flange and an azimuth shell. The disk surface of the azimuth flange is located on the upper end surface of the azimuth shell, and a gap is formed between the outermost rings of the two components.

[0007] The three-stage waterproof structure is arranged in the gap between the azimuth flange and the azimuth shell, and includes a slice, a graphite ring, a friction ring, annular grooves a and b on the azimuth shell, annular bosses a and b on the azimuth flange, and an annular step.

[0008] The slice is in the form of a circular ring and is sleeved on the outer circumferential surface of the annular groove a of the azimuth shell. The lower end surface of the annular boss a is located on the upper end surface of the slice.

[0009] The annular groove a is located outside the annular groove b, and the annular boss a is located outside the annular boss b; the annular boss b is located in the annular groove a;

[0010] The lower end surface of the azimuth flange disc is machined with an annular step, which is located inside the gap; the outer circumferential surface of the annular step, the inner circumferential surface of the annular boss b, the lower end surface of the azimuth flange disc and the upper end surface of the annular boss b of the azimuth housing form a ring-shaped space; the friction ring is in a ring-shaped structure and is installed in the ring-shaped space;

[0011] The graphite ring is installed in the annular groove b and is pressed against the lower surface of the friction ring.

[0012] Further, the three-level waterproof structure further comprises an O-ring; the O-ring is installed in the annular groove b and is located at the bottom of the graphite ring, and there is no connection relationship between the graphite ring and the O-ring; the material of the O-ring is silica gel material.

[0013] Further, a steel ring is installed between the graphite ring and the O-ring.

[0014] The graphite ring is fixed to the upper end surface of the steel ring, and the steel ring is placed above the O-ring.

[0015] Further, the distance between the inner wall surface of the annular groove b and the outer wall surfaces of the two sides of the graphite ring is 0.02mm to 0.05mm.

[0016] Further, the material of the slice is polytetrafluoroethylene.

[0017] Beneficial effects:

[0018] (1) The three-level waterproof structure of the invention is used for the narrow space of the shipborne rotary table, and comprises a ring-shaped convex a of the azimuth flange plate and a slice, a ring-shaped convex b of the azimuth flange plate and a ring-shaped groove a of the azimuth shell, and a graphite ring and a friction ring. The three-level waterproof structure can reduce the impact of seawater through the slice, further block the water through the height difference between the ring-shaped convex b and the ring-shaped groove a, and finally block the remaining water through the sliding friction between the graphite ring and the friction ring. The graphite ring has natural lubricating property, can reduce the friction, and can improve the waterproof effect. The three-level waterproof structure has small and constant friction, can reduce the power consumption of the motor, can reduce the volume of the motor, and can reduce the overall volume of the equipment and the occupied space of the equipment.

[0019] (2) The three-level waterproof structure of the invention is used for the narrow space of the shipborne rotary table, and comprises an O-shaped ring at the bottom of the graphite ring and installed in the ring-shaped groove b. The O-shaped ring is made of silica gel, and the elasticity of the silica gel can make the graphite ring and the friction ring in close contact, and improve the waterproof effect. The graphite ring and the O-shaped ring are provided with a steel ring, and the graphite ring is fixed to the upper end surface of the steel ring. The graphite is a brittle material with low strength, and the steel ring can support the graphite ring and prevent the damage of the graphite ring.

[0020] (3) The three-level waterproof structure of the invention is used for the narrow space of the shipborne rotary table, and comprises a small gap between the ring-shaped groove b and the graphite ring. The structure can hinder the water from entering, and further improve the waterproof effect.

[0021] (4) The three-level waterproof structure of the invention is used for the narrow space of the shipborne rotary table, and the slice is made of polytetrafluoroethylene, which can further reduce the generation of friction. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a sectional view of the shipborne rotary table.

[0023] In the drawings, 1 is a motor, 2 is a bearing, 3 is an azimuth flange plate, 4 is a friction ring, 5 is a graphite ring, 6 is an O-shaped ring, 7 is a slice, 8 is an azimuth shell, 9 is a ring-shaped step, and 10 is a steel ring. DETAILED DESCRIPTION

[0024] The application will be described in detail below with reference to the drawings and examples.

[0025] The embodiment provides a three-stage waterproof structure for multi-level surge protection of a shipborne rotary table in a narrow space. Figure 1 As shown in the figure, the shipborne rotary table comprises a motor 1, a bearing 2, an azimuth flange 3, a rotating shaft and an azimuth housing 8; the bearing 2 is installed inside the azimuth housing 8, the rotating shaft is fixedly connected with an output shaft of the motor 1, the rotating shaft is installed on an inner ring of the bearing 2, and the azimuth flange 3 is fixedly connected with the rotating shaft; when the equipment is running, the azimuth housing 8 is fixed, and the azimuth flange 3 rotates with the driving of the motor 1 through the cooperation of the rotating shaft and the bearing 2; the disc surface of the azimuth flange 3 is located on the upper end surface of the azimuth housing 8, and a gap is formed at the outermost rings of the two components; the three-stage waterproof structure is arranged in the gap between the azimuth flange 3 and the azimuth housing 8.

[0026] The three-stage waterproof structure comprises a slice 7, an O-shaped ring 6, a steel ring 10, a graphite ring 5, a friction ring 4, an annular boss A on the azimuth housing 8, an annular boss B on the azimuth flange 3 and an annular step 9.

[0027] An annular boss A coaxial with the upper end surface of the outer ring of the azimuth housing 8 is machined on the upper end surface of the outer ring of the azimuth housing 8; two annular grooves are machined on the upper end surface of the annular boss A; the two annular grooves are annular groove a and annular groove b from outside to inside; the annular groove b is a precision machining groove; the annular boss B is composed of the annular boss a and the annular boss b; the annular boss a and the annular boss b are sequentially machined on the lower end surface of the disc surface of the azimuth flange 3 from outside to inside, and are used in cooperation with the annular groove a and the annular groove b of the azimuth housing 8 respectively; the annular boss a is sleeved on the outer circumferential surface of the annular boss A of the azimuth housing 8; the annular boss b is located in the annular groove a of the azimuth housing 8, and the thickness of the annular boss b is less than the width of the annular groove a; in the embodiment, the annular spacing between the two (i.e. the spacing between the lower end surface of the annular boss b and the bottom surface of the groove, and the spacing between the two side walls of the annular boss b and the two inner walls of the groove) is 0.5 mm, so that the azimuth flange 3 can rotate smoothly while achieving a certain waterproof effect; the annular boss b and the annular groove a form a water blocking structure; an annular step 9 is machined on the lower end surface of the disc surface of the azimuth flange 3 and located on the inner side of the gap; the outer circumferential surface of the annular step 9, the inner circumferential surface of the annular boss b, the lower end surface of the azimuth flange 3 and the upper end surface of the annular boss b of the azimuth housing 8 form an annular space; the friction ring 4 is annular in structure and is installed in the annular space.

[0028] The slice 7 is circular ring, the inner circumferential surface of the slice 7 is sleeved on the outer circumferential surface of the annular boss of the azimuth housing 8, and is located between the lower end surface of the azimuth flange 3 and the upper end surface of the azimuth housing 8; and in the natural state, the lower surface of the slice 7 is attached to the upper end surface of the azimuth housing 8; when subjected to the impact force of the surge, the upper surface of the slice 7 is pressed against the lower end surface of the annular boss a; in the embodiment, the material of the slice 7 is selected to be polytetrafluoroethylene, because polytetrafluoroethylene has self-lubricating property and can reduce friction;

[0029] The annular groove b is sequentially provided with an O-ring 6, a steel ring 10 and a graphite ring 5 from bottom to top; the graphite ring 5 is pressed against the lower surface of the friction ring 4 for waterproof sealing, the graphite ring 5 can reduce friction due to its natural lubricating property, and the graphite material can become brighter with more grinding, which can improve the waterproof effect; the distance between the two inner wall surfaces of the annular groove b and the outer wall surfaces on both sides of the graphite ring 5 needs to satisfy 0.02mm to 0.05mm, that is, a small gap is formed between the two, which can hinder the entry of water; the graphite ring 5 is fixed on the upper end surface of the steel ring 10 by adhesive, and the steel ring 10 can support the graphite ring 5; the steel ring 10 is placed above the O-ring 6, and there is no connection relationship between the two; in the embodiment, the O-ring 6 is made of silica gel, and the silica gel is elastically deformed to make the graphite ring 5 and the friction ring 4 tightly contact, so that the waterproof sealing property can be guaranteed even if the graphite ring 5 is worn out;

[0030] The annular boss a of the azimuth flange 3 and the slice 7 form a first level waterproof structure, the annular boss b of the azimuth flange 3 and the annular groove a of the azimuth housing 8 form a second level waterproof structure, and the graphite ring 5 and the friction ring 4 form a third level waterproof structure; finally, the height space occupied by the three levels of waterproof structures is only 9.6mm, and the friction of the three levels of waterproof structures is about 4N·m, and the friction is constant;

[0031] Working principle: the embodiment provides a three-level waterproof structure for preventing surge in a narrow space of a shipborne turntable, which comprises three levels of waterproof structures:

[0032] The first level waterproof structure of the method comprises the slice 7 and the annular boss a; when the surge of seawater or river water gives an impact from bottom to top, the slice 7 will move upward along the impact force from bottom to top, and the upper surface of the slice 7 will be tightly attached to the lower end surface of the annular boss a, so that the impact of the surge can be prevented, and part of the water can be blocked from entering the next level; when the surge disappears, the upper surface of the slice 7 is separated from the lower end surface of the annular boss a, and part of the water passing through the first level waterproof structure will flow out along the upper surface of the slice 7, so that the water is prevented from remaining in the gap; at this time, the impact force of the surge has been reduced, but part of the water successfully passes through the first level waterproof structure and enters the second level waterproof structure;

[0033] The second level waterproof structure of the method is a water blocking labyrinth, comprising a ring-shaped convex platform b and a ring-shaped concave groove a, the height difference between the ring-shaped convex platform b and the ring-shaped concave groove a slows down the impact pressure of the secondary part of water and blocks the secondary part of water; at this time, a small part of water still successfully passes through the second level waterproof structure and enters the third level waterproof structure;

[0034] The third level waterproof structure of the method comprises a graphite ring 5 and a friction ring 4; the upper end surface of the graphite ring 5 is in contact with the lower end surface of the friction ring 4, the friction ring 4 rotates along with the rotation of the azimuth flange plate 3, and the remaining small part of water is completely blocked from entering through the tiny gap on both sides of the graphite ring 5 and the sliding friction of the friction ring 4.

[0035] To sum up, the above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-stage waterproof structure for a shipboard turret in a narrow space and for multi-level surge protection, the shipboard turret comprising an azimuth flange and an azimuth housing; the azimuth flange is located on the upper end surface of the azimuth housing, and a gap is formed between the outermost rings of the two components; characterized in that the three-stage waterproof structure is arranged in the gap between the azimuth flange and the azimuth housing, and comprises a slice, a graphite ring, a friction ring, annular grooves a and b on the azimuth housing, annular bosses a and b on the azimuth flange, and an annular step; the slice is in the form of a circular ring and is sleeved on the outer circumferential surface of the annular groove a on the azimuth housing; the lower end surface of the annular boss a is located on the upper end surface of the slice; the annular groove a is located outside the annular groove b, and the annular boss a is located outside the annular boss b; the annular boss b is located in the annular groove a, and the two are in a clearance fit; the lower end surface of the azimuth flange disc is machined with an annular step and is located on the inner side of the gap; the outer circumferential surface of the annular step, the inner circumferential surface of the annular boss b, the lower end surface of the azimuth flange, and the upper end surface of the annular boss b of the azimuth housing form a ring-shaped space; the friction ring is in the form of a ring and is installed in the ring-shaped space; the graphite ring is installed in the annular groove b and is pressed against the lower surface of the friction ring; when the slice is impacted from bottom to top, the slice moves upward, and the upper surface of the slice abuts against the lower end surface of the annular boss a.

2. The three-stage waterproof structure for multi-level surge protection in a narrow space of a shipboard turntable as claimed in claim 1, characterized in that, The three-stage waterproof structure further comprises an O-ring; the O-ring is installed in the annular groove b and is located at the bottom of the graphite ring, and there is no connection between the graphite ring and the O-ring; the material of the O-ring is silicone.

3. The three-stage waterproof structure for the narrow space of the shipboard rotary table according to claim 2, characterized in that, A steel ring is arranged between the graphite ring and the O-ring; the graphite ring is fixed to the upper end surface of the steel ring, and the steel ring is placed above the O-ring.

4. The three-stage waterproof structure for multi-level surge protection in a narrow space of a shipboard turntable as claimed in claim 1, characterized in that, The distance between the inner wall surface of the annular groove b and the outer wall surfaces of the two sides of the graphite ring is 0.02mm to 0.05mm.

5. The three-stage waterproof structure for multi-level surge protection in a narrow space of a shipboard turntable as claimed in any one of claims 1 to 4, characterized in that, The material of the slice is polytetrafluoroethylene.

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