CN218537026U

CN218537026U - Soft steel arm type single-point mooring head

Info

Publication number: CN218537026U
Application number: CN202220668247.0U
Authority: CN
Inventors: 辛顺; 刘波; 王屹; 吕伟; 张棣; 熊清海
Original assignee: Offshore Oil Engineering Co Ltd
Current assignee: Offshore Oil Engineering Co Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2023-02-28
Anticipated expiration: 2032-03-24

Abstract

The utility model discloses a soft steel arm-type single-point mooring head, including cross head, tripod, runner assembly, the cross head passes through self-lubricating bearing subassembly and is connected with the tripod rotation, has solved the problem with the inefficacy situation such as three rows roller bearing easily harms, production abnormal sound, need not operations such as regular supplementary lubricating grease, and bearing capacity is stronger, and factor of safety is higher.

Description

Soft steel arm type single-point mooring head

Technical Field

The utility model relates to an ocean engineering equipment field especially relates to a mild steel arm-type single point mooring head.

Background

Single point mooring FPSOs with wind vane effect are widely accepted means of oil and gas production. The mooring rope is used as a key device of the soft steel arm type single-point mooring, and bears the high-frequency horizontal and vertical swinging and mooring force of the FPSO. In the prior art, a soft steel arm type single-point mooring head adopts three rows of roller bearings to realize the left-right swinging motion of the mooring head and bear mooring force. The three-row roller bearing needs good lubrication to ensure long-term stable operation, and the existing soft steel arm type single-point mooring heads adopt manual regular grease supplement to realize the lubrication of the bearing. However, severe weather often occurs at sea, so that the supplementary grease sometimes cannot be supplemented according to a specified period, and the bearing wear is increased. When severe weather occurs on the sea, the FPSO can generate large-amplitude irregular motions of up, down, left, right and the like along with the action of wind waves, and the mooring head can bear large impact force. The three-row roller bearing is in contact with the bearing body through the roller, belongs to line contact, is easy to damage the bearing roller and a rolling surface due to impact, generates failure conditions such as abnormal sound and the like, and threatens the normal operation of single-point mooring.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a soft steel arm-type single point mooring system head realizes the non-maintaining of system head, does not need operations such as periodic supplementary lubricating grease, and bearing capacity is stronger, and factor of safety is higher.

In order to solve the technical problem, the utility model provides a soft steel arm type single point mooring head, which comprises a crosshead, a tripod and a rotating assembly, wherein the crosshead is rotatably connected with the tripod through a self-lubricating bearing assembly;

rotating assembly, rotating assembly includes bearing base, bearing cap, bearing inner race and self-lubricating bearing assembly, be equipped with the opening on the bearing base side, the embedding of bearing inner race in the opening of bearing base, the bearing base with pass through between the bearing inner race self-lubricating bearing assembly realizes rotating, the bearing cap shutoff in bearing base's opening, and will the bearing base self-lubricating bearing assembly reaches the bearing inner race compresses tightly, and first bolt and nut run through the bearing base with the bearing cap will rotating assembly is fixed in the cross head, the tripod is fixed in through second bolt and nut the bearing inner race, the bearing inner race respectively with the bearing base with be equipped with the sealing washer between the bearing cap.

Furthermore, self-lubricating bearing subassembly includes axial self-lubricating bearing, radial self-lubricating bearing and upper axial self-lubricating bearing down, axial self-lubricating bearing down with upper axial self-lubricating bearing locates respectively bearing inner race medial surface with bearing inner race opening with bearing inner race lateral surface with the bearing cap, radial self-lubricating bearing locates bearing inner race terminal surface with between the bearing inner race.

Further, the bearing outer ring is L-shaped, one end of the bearing outer ring is embedded into the opening of the bearing base, and the tripod is fixed at the other end of the bearing outer ring.

Further, the sealing ring comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the bearing outer ring and the bearing base, and the second sealing ring is arranged between the bearing outer ring and the bearing cover.

Further, the tripod and the side surface of the bearing outer ring jointly form a groove, and the bearing cover is embedded into the groove.

The technical effects of the utility model reside in that: (1) The soft steel arm type single-point mooring head comprises a crosshead, a tripod and a rotating assembly, wherein the crosshead is rotatably connected with the tripod through a self-lubricating bearing assembly, so that the problems of failure conditions such as easiness in damage and abnormal sound generation of three rows of roller bearings are solved, operations such as periodic grease supplement are not needed, the bearing capacity is higher, and the safety factor is higher; (2) The bearing base and the bearing outer ring are provided with first sealing rings, the second sealing ring is arranged between the bearing cover and the bearing outer ring, and the arrangement of the two sealing rings ensures the sealing performance between the bearings.

Drawings

FIG. 1 is a schematic view of a mild steel arm single point mooring system;

FIG. 2 is a structural layout diagram of a soft steel arm type single point mooring head;

FIG. 3 is an enlarged schematic view of the circled portion of the mooring head of FIG. 2.

Description of the reference numerals: 1-crosshead, 2-tripod, 3-bearing base, 4-lower axial self-lubricating bearing, 5-radial self-lubricating bearing, 6-first sealing ring, 7-upper axial self-lubricating bearing, 8-bearing outer ring, 9-second sealing ring, 101-first bolt, 111-first nut, 102-second bolt, 112-second nut and 12-bearing cover.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a soft steel arm type single point mooring head, and each step is implemented as follows:

a soft steel arm type single point mooring head is shown in figure 1 and comprises a crosshead 1, a tripod 2 and a rotating assembly, wherein the crosshead 1 is rotatably connected with the tripod 2 through a self-lubricating bearing assembly.

As shown in fig. 2, the rotating assembly comprises a bearing base 3, a bearing cover 12, a bearing outer ring 8 and a self-lubricating bearing assembly, an opening is formed in the side edge of the bearing base 3, the bearing outer ring 8 is embedded into the opening of the bearing base 3, the bearing base 3 and the bearing outer ring 8 are rotated through the self-lubricating bearing assembly, the bearing cover 12 is plugged in the opening of the bearing base 3, and the bearing base 3, the self-lubricating bearing assembly and the bearing outer ring 8 are tightly pressed.

The first bolt 101 and the first nut 111 penetrate through the bearing base 3 and the bearing cover 12 to fix the rotating assembly on the crosshead 1, the tripod 2 is fixed on the bearing outer ring 8 through the second bolt 102 and the second nut 112, and a sealing ring is arranged between the bearing outer ring 8 and the bearing base 3 and the bearing cover 12 respectively.

As shown in fig. 3, the self-lubricating bearing assembly includes a lower axial self-lubricating bearing 4, a radial self-lubricating bearing 5 and an upper axial self-lubricating bearing 7, the lower axial self-lubricating bearing 4 and the upper axial self-lubricating bearing 7 are respectively disposed on an inner side surface of the bearing outer ring 8 and an opening of the bearing base 3, and an outer side surface of the bearing outer ring 8 and the bearing cover 12, and the radial self-lubricating bearing 5 is disposed between an end surface of the bearing outer ring 8 and the bearing base 3.

The bearing outer ring 8 is L-shaped, one end of the bearing outer ring is embedded into the opening of the bearing base 3, and the tripod 2 is fixed at the other end of the bearing outer ring.

The sealing ring comprises a first sealing ring 6 and a second sealing ring 9, the first sealing ring 6 is arranged between the bearing outer ring 8 and the bearing base 3, and the second sealing ring 9 is arranged between the bearing outer ring 8 and the bearing cover 12.

The tripod 2 and the side face of the bearing outer ring 8 are formed together with a groove into which the bearing cap 12 is fitted.

The working principle of the soft steel arm type single-point mooring head of the embodiment is as follows: and self-lubricating axial bearings and radial bearings are arranged among the bearing base 3, the bearing outer ring 8 and the bearing cover 12, so that the tripod 2 rotates around the crosshead 1.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. The utility model provides a mild steel arm-type single point mooring head which characterized in that: the rotary assembly comprises a bearing base, a bearing cover, a bearing outer ring and a self-lubricating bearing assembly, and the crosshead is rotatably connected with the tripod through the self-lubricating bearing assembly;

rotating assembly, be equipped with the opening on the bearing base side, the embedding of bearing inner race in bearing base's the opening, bearing base with pass through between the bearing inner race self-lubricating bearing assembly realizes rotating, the bearing cap shutoff in bearing base's opening, and will bearing base self-lubricating bearing assembly reaches the bearing inner race compresses tightly, and first bolt and nut run through bearing base with the bearing cap will rotating assembly is fixed in the cross head, the tripod is fixed in through second bolt and nut the bearing inner race, the bearing inner race respectively with the bearing base with be equipped with the sealing washer between the bearing cap.

2. The mild steel arm single point mooring head of claim 1, wherein: the self-lubricating bearing assembly comprises a lower axial self-lubricating bearing, a radial self-lubricating bearing and an upper axial self-lubricating bearing, wherein the lower axial self-lubricating bearing and the upper axial self-lubricating bearing are respectively arranged on the inner side surface of the bearing outer ring and the bearing base, the opening of the bearing outer ring and the outer side surface of the bearing outer ring and the bearing cover, and the radial self-lubricating bearing is arranged on the end surface of the bearing outer ring and between the bearing bases.

3. The mild steel arm single point mooring head of claim 1, wherein: the bearing outer ring is L-shaped, one end of the bearing outer ring is embedded into the opening of the bearing base, and the tripod is fixed at the other end of the bearing outer ring.

4. The mild steel arm single point mooring head of claim 1, wherein: the sealing ring comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the bearing outer ring and the bearing base, and the second sealing ring is arranged between the bearing outer ring and the bearing cover.

5. The mild steel arm single point mooring head of claim 3, wherein: the side surfaces of the tripod and the bearing outer ring jointly form a groove, and the bearing cover is embedded into the groove.