CN201118299Y

CN201118299Y - Protection structure for submersible linear motor permanent magnetic body

Info

Publication number: CN201118299Y
Application number: CNU200720013845XU
Authority: CN
Inventors: 冯春国
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-17
Filing date: 2007-08-17
Publication date: 2008-09-17
Anticipated expiration: 2017-08-17

Abstract

A protection structure of a permanent magnet of a submersible linear motor comprises a ring-shaped permanent magnet and is characterized in that the upper surface and the lower surface of the ring-shaped permanent magnet are provided with a magnetic conductive metal material layer; the surface of the magnetic conductive metal material layer undergoes wear-resistant and corrosion resistant treatment; the circumferential surface of the ring permanent magnet is provided with a non-magnetic metal ring while the surface of the non-magnetic metal ring undergoes wear-resistant and corrosion resistant treatment; the magnetic conductive metal material layer on the upper surface and the lower surface of the ring permanent magnet and the non-magnetic metal ring are hermetically connected by welding. The protection structure of the permanent magnet of the submersible linear motor has the advantages that: the ring-shaped permanent magnet is arranged in a sealed environment, so the ring-shaped permanent magnet can be prevented from being corroded by a plurality of corrosion medium such as acid, alkali, hydrogen and oxygen in the well fluid, at the same time, chemical change in the interior and on the surface of the permanent magnet can be avoided; the magnetic properties of the permanent magnet can be stabilized; the anti-corrosion and anti-wearing performance of the outer surface of the permanent magnet can be strengthened; thus, the crushing strength of the permanent magnet material can be enhanced; the anti-corrosion and anti-wearing performance of the submersible linear motor can be enhanced and the service life of the submersible linear motor can be prolonged.

Description

The protection structure of oil-submersible linear electric motor permanent magnet

Technical field

The utility model belongs to a kind of assembly that is used on the oil immersion line motor mover, the sealing of particularly a kind of oil-submersible linear electric motor permanent magnet, anticorrosion, wear-resisting, the protection structure that strengthens.

Background technology

The general oil recovery machiner that is made of oil pumper, sucker rod and oil well pump that adopts at present both at home and abroad recovers the oil, there are shortcomings such as volume is big, cost is high, ineffective power consumption greatly, easily breaks down in existing oil recovery machiner, the applicant has developed a kind of " reciprocating submersible electric pump " for this reason, fundamentally changed the artificial lifting way of oil extraction, have characteristics such as accent ginseng simple in structure, energy-saving and cost-reducing, easy to operate, online, the sucker rod that has thoroughly solved long-term puzzlement mechanical oil recovery both at home and abroad takes off, the difficult problem of disconnected and side-abrasion of rod string.It not only can substitute trip Beam formula oil production equipment, also is highly suitable for the oil recovery of horizontal well, deviated directional drilling and hyposmosis oil well.But put into practice by on-the-spot the use, permanent magnet in the discovery oil immersion line motor mover is anti-corrosion, anti-wear performance is poor, usually damaged and corrosion causes motor performance to descend because of it, has influenced the useful life of oil immersion line motor, particularly at seriously corroded with contain in the sand oil well environment and can not use.

The utility model content

The purpose of this utility model provides a kind of protection structure of oil-submersible linear electric motor permanent magnet; avoid the inner and surperficial chemical change of permanent magnet; stablize the magnetic property of permanent magnet, improve anti-corrosion, the anti-wear performance of oil immersion line motor mover, thereby improve the useful life of oil immersion line motor.

The purpose of this utility model is achieved by the following technical solution: comprise annular permanent magnet, it is characterized in that: upper and lower two end faces at annular permanent magnet are provided with the surface through magnetic conductive metal material layer wear-resisting, anti-corrosion processing, the surface is set through non-magnetic conductive metal ring wear-resisting, anti-corrosion processing on the periphery of annular permanent magnet, the non-magnetic conductive metal ring that is provided with on the magnetic conductive metal material layer of upper and lower two end face settings and the periphery is by the melting welding sealed attachment.

The utility model has the advantages that: annular permanent magnet is placed in the sealed environment, multiple corrosive mediums such as acid in the well liquid, alkali, hydrogen, oxygen have been completely cut off to its corrosiveness, avoid the inner and surperficial chemical change of permanent magnet, stablize the magnetic property of permanent magnet, anti-corrosion, the anti-wear performance of outer surface strengthen, and then improved the compressive resistance of permanent magnetic material, improved anti-corrosion, the anti-wear performance of oil immersion line motor mover, thereby improved the useful life of oil immersion line motor.

Description of drawings

Fig. 1 is the schematic appearance of the utility model product.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is that the utility model product is assembled in the schematic diagram on the oil immersion line motor mover.

Embodiment

Concrete technical scheme of the present utility model is as follows: see Fig. 1,2, upper and lower two end faces at annular permanent magnet 3 are provided with magnetic conductive metal material layer 1, non-magnetic conductive metal ring 2 is set on the periphery of annular permanent magnet 3, the non-magnetic conductive metal ring 2 that is provided with on the magnetic conductive metal material layer 1 of upper and lower two end face settings and the periphery by the melting welding sealed attachment, is sealed annular permanent magnet 3 at its seam crossing.With wear-resisting, the anti-corrosion processing of non-magnetic conductive metal ring 2 surfaces that are provided with on magnetic conductive metal material layer 1 surface of two end face settings and the periphery through conventional process of surface treatment such as plating, surfacings.

See Fig. 3, a plurality of the utility model products and a plurality of magnetic conductor 5 are assembled on the oil immersion line motor mover mandrel 4 separately, assembling O-ring seal 6 constitutes the mover assembly with sealing annular permanent magnet between the inner surface of the utility model product and magnetic conductor 5 and mover mandrel 4.

Claims

1, a kind of protection structure of oil-submersible linear electric motor permanent magnet; comprise annular permanent magnet; it is characterized in that: upper and lower two end faces at annular permanent magnet are provided with the surface through magnetic conductive metal material layer wear-resisting, anti-corrosion processing; the surface is set through non-magnetic conductive metal ring wear-resisting, anti-corrosion processing on the periphery of annular permanent magnet, the non-magnetic conductive metal ring that is provided with on the magnetic conductive metal material layer of upper and lower two end face settings and the periphery is by the melting welding sealed attachment.