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Auxiliary braking device for magnetic rheological body petroleum drilling rig

An auxiliary brake and variant technology, applied in mechanical equipment, hydraulic resistance brakes, brake types, etc., can solve the problems of not easy to dissipate heat, rapid temperature rise, high manufacturing precision, and overcome the problems of poor low-speed performance, large amount of winding, and high manufacturing low cost effect

Active Publication Date: 2007-04-11
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it overcomes the shortcomings of the rotary magneto-rheological fluid brake using two turntable structures, and the turntable rotor only produces braking torque on the radial surface, and overcomes the shortcomings of high manufacturing precision, fast temperature rise, difficult heat dissipation, and poor safety.

Method used

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  • Auxiliary braking device for magnetic rheological body petroleum drilling rig
  • Auxiliary braking device for magnetic rheological body petroleum drilling rig
  • Auxiliary braking device for magnetic rheological body petroleum drilling rig

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: refer to accompanying drawing 1. Magneto-rheological fluid oil drilling rig auxiliary braking device, the upper and lower magnetic end caps 1 and 3 have an outer diameter of 1000 mm and a thickness of 50 mm, and are made of magnetic material. There is a shaft hole in the middle of the upper magnetic end cover 3 . A cylindrical cylinder 10 made of a non-magnetic material is fixed between the upper and lower magnetic end caps 1 and 3. The cylindrical cylinder 10 has an inner diameter of 700 mm and a height of 300 mm and is made of a non-magnetic material. There are two magnetically conductive cylinders 2 that are wound with excitation coils outside the cylindrical cylinder 10, the effective length of the magnetically conductive cylinders 2 being wound with excitation coils is 300 millimeters, and the diameter is 70 millimeters. Two magnetically conductive cylinders 2 wound with excitation coils are installed on both sides of the cylinder 10; There is non-m...

Embodiment 2

[0031] Embodiment 2: Embodiment 2 is basically the same as Embodiment 1, the difference is that the number of magnetically permeable cylinders 2 wound with excitation coils is four, and the magnetically permeable cylinders 2 wound with excitation coils are evenly distributed on the outside of cylinder 10 . The number of turns of the exciting coil 11 on the magnetically permeable cylinder 2 wound with the exciting coil is 350 turns respectively. Refer to accompanying drawing 3. The number of blades 8 can be four. The shape of the blade 8 is an empty slot type, and there are two symmetrical rectangular holes 12 on the blade 8 . The gap between the side end surface and the upper and lower end surfaces of the blade 8 and the cylinder barrel 10 and the upper and lower magnetic end caps 1 and 3 respectively is 3 millimeters.

Embodiment 3

[0032] Embodiment 3: Embodiment 2 is basically the same as Embodiment 1, the difference is that the number of magnetically conductive cylinders 2 wound with excitation coils is 6, and the magnetically conductive cylinders 2 wound with excitation coils are evenly distributed on the outside of cylinder 10 . The number of turns of the exciting coil 11 on the magnetically permeable cylinder 2 wound with the exciting coil is 750 turns respectively. Refer to accompanying drawing 4. The number of blades 8 can be 2 pieces. The shape of the blade 8 is an open type, and a cylinder 13 with a tapered hole is arranged on both sides of the blade 8 . The gap between the side end surface and the upper and lower end surfaces of the blade 8 and the cylinder barrel 10 and the upper and lower magnetic end caps 1 and 3 respectively is 6 millimeters.

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Abstract

The auxiliary braking device with magnetic rheological body for petroleum rig includes one cylinder of non-magnetic conductive material and two end caps of magnetic conductive material to form one sealed cylindrical cavity, two magnetic conductive columns with wound exciting coil outside the cylinder and between the two end caps, one shaft of non-magnetic conductive material with fixed magnetic conductive blades set between the two end caps, and magnetic rheological body filled in the sealed cylindrical cavity. The present invention can provide great braking moment at all rig winch speeds, and has stepless regulation of braking moment, fast response, low cost and long service life.

Description

technical field [0001] The invention relates to an auxiliary braking device for an oil drilling rig, in particular to an auxiliary braking device for an oil drilling rig using magneto-rheological technology. Background technique [0002] At present, known auxiliary brake devices for oil drilling rigs include water brakes, electromagnetic eddy current brakes, multi-disc brakes, and Eaton air-controlled brakes. [0003] Water brake is a kind of auxiliary brake often used by oil drilling rigs. Its braking torque is proportional to the square of the speed. Therefore, the braking torque is very low when running at low speed, which cannot meet the needs of deep well drilling. [0004] Electromagnetic eddy current braking, such as Chinese patent announcement number: 2079386, provides a kind of novel electromagnetic eddy current braking device. It is composed of motor, transformer, rectifier, stator, stator coil, rotor shaft, cooling water cavity and circulating water cooling devic...

Claims

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Application Information

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IPC IPC(8): F16D57/02
Inventor 王德国杨汉立
Owner BC P INC CHINA NAT PETROLEUM CORP
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