CN-122009993-A - Magnetic suspension disc type winding machine and ocean heave compensation system

CN122009993ACN 122009993 ACN122009993 ACN 122009993ACN-122009993-A

Abstract

The invention relates to the technical field of ocean heave compensation, in particular to a magnetic suspension disc type winding machine and an ocean heave compensation system, which comprise a shell and a roller, wherein the roller is arranged in a cavity of the shell, a fan-shaped permanent magnet group and an annular permanent magnet group are arranged at the end part of the roller, a fan-shaped winding for providing a magnetic field for the fan-shaped permanent magnet group and an annular winding for providing a magnetic field for the annular permanent magnet group are arranged on the shell, and a supporting piece is arranged at the bottom of the shell and can provide supporting force for the roller in a power-off state. The invention replaces complex hydraulic components such as the traditional hydraulic cylinder, the energy accumulator and the like by using the winding and the permanent magnet group. The system has the advantages of simplified structure, faster response, more accurate control and lower energy consumption.

Inventors

XIAO YUKUN
Qi Wendi
XIAO WENSHENG
WANG GUANGCHENG
ZHANG YIXUAN
CUI JUNGUO
LIU QI
Jia Quxian
WANG XINYUE
WANG YANG

Assignees

中国石油大学(华东)

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. A magnetic suspension disc type winding machine is characterized by comprising a shell and a roller, wherein the roller is arranged in a cavity of the shell, a sector permanent magnet group and an annular permanent magnet group are arranged at the end part of the roller, a sector winding for providing a magnetic field for the sector permanent magnet group and an annular winding for providing a magnetic field for the annular permanent magnet group are arranged on the shell, and a supporting piece is arranged at the bottom of the shell and can provide supporting force for the roller in a power-off state.
2. A magnetic levitation disc type winding machine as set forth in claim 1, wherein the bottom walls of both ends of the drum are provided with sector permanent magnet groups, and the side walls of both ends of the drum are provided with ring-shaped permanent magnet groups.
3. A magnetic levitation disc type winding machine as defined in claim 1, wherein the housing comprises a first casing and a second casing, the first casing and the second casing each have a cavity for forming the cavity, an annular groove for placing the annular winding is provided on an inner wall of the cavity, and a sector groove for placing the sector winding is provided on an end surface of the cavity.
4. The magnetic levitation disc type winder as claimed in claim 1, wherein the sector permanent magnet group comprises three pairs of sector permanent magnets, each pair of sector permanent magnets comprises a sector N-pole permanent magnet and a sector S-pole permanent magnet, and the sector permanent magnet group is formed by arranging the sector N-pole permanent magnet and the sector S-pole permanent magnet at intervals along the circumferential direction of the drum.
5. The magnetic levitation disc type winding machine according to claim 1, wherein the ring-shaped permanent magnet group comprises two pairs of ring-shaped permanent magnets, each pair of ring-shaped permanent magnets comprises a ring-shaped N-pole permanent magnet and a ring-shaped S-pole permanent magnet, and the ring-shaped permanent magnet group is formed by arranging the ring-shaped N-pole permanent magnets and the ring-shaped S-pole permanent magnets at intervals along the circumferential direction of the drum.
6. The magnetic levitation disc type winding machine according to claim 1, wherein the drum comprises a rope winding part, the rope winding part is arranged between two end parts of the drum, the diameter of the rope winding part is smaller than that of the end parts, the rope winding part is wound with a steel wire rope, one end of the steel wire rope extends out of a slotted hole in the bottom of the shell, and a tension sensor for measuring the tension of the steel wire rope is connected to the steel wire rope.
7. The magnetic levitation disc type winding machine according to claim 1, wherein the first casing and the second casing are respectively provided with a plurality of fins for radiating heat, the first casing and the second casing are respectively provided with mounting holes, the mounting holes are positioned between two adjacent fins, and bolts sequentially pass through the mounting holes on the first casing and the mounting holes on the second casing to enable the first casing to be connected with the second casing.
8. The magnetic levitation disc type winding machine according to claim 6, wherein the supporting member comprises a supporting block, a spring and an elastic sheet, the elastic sheet is connected with the supporting block through the spring, and in the energized state, the spring is in a contracted state under the action of magnetic force generated by the built-in winding of the supporting member, and in the de-energized state, the spring enables the elastic sheet to provide supporting force for the roller under the action of self elastic force.
9. A magnetic levitation disc type winding machine according to claim 8, wherein the top of the spring plate is provided with an arc-shaped groove adapted to the rope winding part.
10. A marine heave compensation system, comprising a magnetic levitation disc type coiling machine according to any one of claims 1 to 9, a control system and a built-in encoder, wherein the magnetic levitation disc type coiling machine is connected to a floating platform, a tension sensor is connected with the control system, the control system is connected with the built-in encoder through a vector frequency converter, and the built-in encoder can change the magnitude of a magnetic field for driving a roller to rotate.

Description

Magnetic suspension disc type winding machine and ocean heave compensation system Technical Field The invention relates to the technical field of ocean heave compensation, in particular to a magnetic suspension disc type winding machine and an ocean heave compensation system. Background In floating drilling operations, the platform is constantly performing heave motions due to wind, wave and current. If compensation is not performed, the motion is directly transmitted to the drill rod, so that the bit pressure is not controlled, the drill bit can leave the bottom of the well, the bottom of the well is impacted hard, and the rock cannot be effectively broken. Damage to equipment and wellbores, and the drill pipe, drill bit, wellhead assembly can be subjected to alternating stresses, subject to fatigue failure, and potentially damage the drilled wellbore wall. As shown in figure 1, when the platform is lifted, the platform drives the crown block to move upwards to try to pull the hook to lift. However, the hook tends to remain stationary due to the downward weight of the drill pipe. This causes the compensating cylinder to be compressed and the hydraulic oil in the cylinder to be forced into the accumulator, further compressing the nitrogen therein, absorbing the kinetic energy of the rise of the platform. When the platform descends, the platform drives the crown block to move downwards, and the pulling force on the big hook is reduced. At this time, compressed nitrogen in the energy accumulator expands, hydraulic oil is pushed back to the compensation cylinder, and a piston rod of the compensation cylinder is pushed to extend out, so that the large hook is propped against, and the large hook cannot fall along with the platform due to the falling. The crown block heave compensation platform used at present has the problems that 1, the crown block compensation device has higher requirements on the strength of the derrick. This is because the compensating device is mounted directly on the crown block, both its action and reaction forces acting directly on the derrick structure. 2. The hydraulic system is selected, and particularly, the hydraulic cylinder is sealed more, so that hydraulic oil is easy to leak out. This is a common point of failure for hydraulic systems, which can affect system pressure and stability. 3. The gear-rack transmission mechanism adopted in the heave compensation device can generate certain vibration excitation in the meshing process. Long-term operation may lead to wear, fatigue, affecting transmission accuracy and life. 4. The energy consumption is high, if the treatment is improper in the aspect of the total efficiency of energy recovery and release, not only can the energy waste be caused, but also the linkage problems such as heating of the system oil liquid can be caused. Disclosure of Invention The invention aims to provide a magnetic suspension disc type winding machine, which solves the problem that the fault rate of a hydraulic system is high in the prior art. In order to achieve the above purpose, the technical solution adopted by the invention is as follows: A magnetic suspension disc type winding machine comprises a shell and a roller, wherein the roller is arranged in a cavity of the shell, a fan-shaped permanent magnet group and an annular permanent magnet group are arranged at the end part of the roller, a fan-shaped winding for providing a magnetic field for the fan-shaped permanent magnet group and an annular winding for providing a magnetic field for the annular permanent magnet group are arranged on the shell, a supporting piece is arranged at the bottom of the shell, and the supporting piece can provide supporting force for the roller in a power-off state. Further, fan-shaped permanent magnet groups are arranged on the bottom walls of the two end parts of the roller, and annular permanent magnet groups are arranged on the side walls of the two end parts of the roller. Further, the shell comprises a first shell and a second shell, the first shell and the second shell are respectively provided with a cavity for forming the cavity, an annular groove for placing the annular winding is formed in the inner wall of the cavity, and a sector groove for placing the sector winding is formed in the end face of the cavity. Further, the sector permanent magnet group comprises three pairs of sector permanent magnets, each pair of sector permanent magnets comprises a sector N-pole permanent magnet and a sector S-pole permanent magnet, and the sector permanent magnet group is formed by arranging the sector N-pole permanent magnet and the sector S-pole permanent magnet at intervals along the circumferential direction of the roller. Further, the annular permanent magnet group comprises two pairs of annular permanent magnets, each pair of annular permanent magnets comprises an annular N-pole permanent magnet and an annular S-pole permanent magnet, and the annular permanent magnet group