CN103423154A

CN103423154A - Sealing structure on vertical-type motor direct drive screw pump driving device

Info

Publication number: CN103423154A
Application number: CN201210160425XA
Authority: CN
Inventors: 张�成; 林海
Original assignee: SHANDONG LIJIU ELECTRICAL MACHINERY CO Ltd
Current assignee: SHANDONG LIJIU ELECTRICAL MACHINERY CO Ltd
Priority date: 2012-05-23
Filing date: 2012-05-23
Publication date: 2013-12-04

Abstract

The invention relates to a device on an oil field oil extraction machine, and concretely provides a sealing structure on a vertical-type motor direct drive screw pump driving device. The sealing structure is characterized in that a deep groove ball bearing, a lip-shaped seal ring, a mechanical seal bushing, a mechanical seal moving ring, a mechanical seal static ring and a round nut are arranged on the steps of the inner cavity of the upper part of a motor hollow shaft or on an outward projection of a fixed long shaft; buttons, O-shaped seal rings, a drive sleeve, a seal gasket, a seal ring and a nut plug are arranged outside the upper part of the motor hollow shaft successively; the seal gasket, the seal ring and the nut plug are fastened in the drive sleeve; the seal ring is compressed by the nut plug to form a seal. In order to discover the sealing structure failure expediently, an oil drain port is arranged at the exterior of the motor hollow shaft and communicated with the flow pass of the mechanical seal bushing. In the sealing structure, the mechanical seal is installed in the interior of a motor main shaft, a seal seat and a seal cover structure are omitted, and the size of the whole sealing structure is shrunk greatly. In addition, the flat gasket seal ring and the nut plug between the drive sleeve and the screw pump polish rod are easy to disassemble and assemble. The sealing structure has advantages of reasonable structure, easy disassembly and assembly, convenient maintenance, long service life and the like.

Description

Sealing configuration on a kind of vertical machine driving device for directly-driven screw pump

Technical field

The present invention relates to a kind of sealing configuration on the Screw Pump of Oil Field oil recovery machiner, specifically the sealing configuration on a kind of vertical machine driving device for directly-driven screw pump.

Background technique

At present, oil field at home screw pump unit drive unit, the common electric machine band gear-box deceleration that some employings are more backward, adopt in addition the motor direct-drive mode, this driving mode sealing configuration adopts electric machine main shaft to be connected with sealing seat, and mechanical seal is arranged in sealing seat, the outside of whole sealing configuration is equipped with seal closure, this structure makes whole sealing configuration size too large, and the mechanical sealing element size also strengthens, and is easy to damage and increased purchase cost.

Summary of the invention

The objective of the invention is to solve above-mentioned the deficiencies in the prior art, sealing configuration on a kind of vertical machine driving device for directly-driven screw pump is provided, the sealing structure is directly installed on electric machine main shaft inside to mechanical seal, sealing seat and seal closure structure have been saved, make the size of integral seal structure greatly dwindle, the sealing of plain cushion seal ring between drive sleeve and polished rod of screw pump, nut plug is easy to dismounting, have easy to assemble, convenient for maintaining.

The technical solution adopted for the present invention to solve the technical problems is:

Sealing configuration on a kind of vertical machine driving device for directly-driven screw pump, be provided with motor-hollow axle, fixedly major axis, deep groove ball bearing, lip-type packing, O-ring seals, mechanical seal lining, mechanical sealing linkage ring, mechanical sealing static ring, polished rod of screw pump, it is characterized in that the rotor core of fixed electrical machinery on motor-hollow axle, the inner chamber boss place of motor-hollow axle and the outer ring transition fit of deep groove ball bearing, fixedly the inner ring interference fit of the outer lug boss of major axis and deep groove ball bearing, have drain tap in the outside of motor-hollow axle, 3 seal with O rings for the inner chamber of mechanical seal excircle of bushing cylinder and motor-hollow axle, by screw and motor-hollow axle, locked together, mechanical seal lining endoporus and mechanical sealing linkage ring endoporus and fixedly major axis be large Spielpassung, lip-type packing is contained in the mechanical seal lining, cylindrical and mechanical seal lining are close together, endoporus lip limit contacts with fixing major axis cylindrical, mechanical sealing linkage ring is arranged in the mechanical seal lining, by stop pin, connected again, form the anti-rotation of sense of rotation, clean lubricating oil is arranged between plane on mechanical sealing static ring lower plane and mechanical sealing linkage ring, and under the pressure of mechanical sealing static ring spring close contact, formed the motive sealing that pressure is not less than 3Mpa, the mechanical sealing static ring inner chamber is become to be not less than the static seal of 3Mpa by O shape circle and fixing major axis outer ring, mechanical sealing static ring is by the socket head screw of self, be fastened on fixedly on major axis, by round nut is auxiliary, be fastened on fixedly on major axis again, the drive sleeve inner hole sleeve is contained on the external cylindrical surface of motor-hollow axle, by two O-ring seals sealings, with a key, with two socket head screws, be connected, fitting tight circle pad between drive sleeve top endoporus and polished rod of screw pump, seal ring, the nut plug, by the nut plug, fixed.

The present invention is owing to adopting said structure, has the advantages such as rational in infrastructure, easy to assemble, convenient for maintaining, long service life.

The accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Reference character: motor-hollow axle 1, fixedly major axis 2, deep groove ball bearing 3, lip-type packing 4,

Drain tap 5, screw 6, socket head screw 7, O-ring seals 8, mechanical seal lining 9, O-ring seals 10, mechanical sealing linkage ring 11, mechanical sealing static ring 12, round nut 13, drive sleeve 14, sealed loop-pad 15, seal ring 16, polished rod of screw pump 17, nut plug 18, key 19, stop pin 20.

Embodiment:

Below in conjunction with accompanying drawing, the present invention is further described:

As shown in drawings, sealing configuration on a kind of vertical machine driving device for directly-driven screw pump, be provided with motor-hollow axle, fixing major axis, deep groove ball bearing, lip-type packing, O-ring seals, the mechanical seal lining, mechanical sealing linkage ring, mechanical sealing static ring, polished rod of screw pump, it is characterized in that the rotor core of fixed electrical machinery on motor-hollow axle 1, when motor starts, motor-hollow axle just rotates with rotor core, the inner chamber boss place of motor-hollow axle 1 and the outer ring transition fit of bearing 3, the fixing inner ring interference fit of the outer lug boss of major axis 2 and bearing 3, like this when motor-hollow axle 1 rotation, the outer ring of bearing 3 rotates together with motor, the inner ring of bearing 3 and fixing major axis 2 transfixion, in addition, for the ease of finding that sealing configuration lost efficacy, have drain tap 5 in the outside of motor-hollow axle, its runner with mechanical seal lining 9 communicates, 3 O shape circle 8 sealings for the inner chamber of mechanical seal lining 9 external cylindrical surfaces and motor-hollow axle 1, by 2 screws 6 and motor-hollow axle 1, locked together again, form static seal, mechanical seal lining 9 endoporus and mechanical sealing linkage ring 11 endoporus and fixedly major axis 2 are large Spielpassung, lip-type packing 4 is contained in mechanical seal lining 9, cylindrical and mechanical seal lining 9 are close together, endoporus lip limit contacts with fixing major axis cylindrical, form the low pressure motive sealing, mechanical sealing linkage ring 11 is arranged in mechanical seal lining 9, form static seal with O shape circle and mechanical sealing linkage ring 11, by 1 stop pin 20, connected again, form the anti-rotation of sense of rotation, when motor starts, the O-ring seals 8 of mechanical sealing linkage ring below 11, mechanical seal lining 9, screw 6, lip-type packing 4, the outer ring of deep groove ball bearing 3, all rotations together with motor-hollow axle 1, between plane, clean lubricating oil is arranged on mechanical sealing static ring 12 lower planes and mechanical sealing linkage ring 11, and under the pressure of mechanical sealing static ring spring close contact, formed the motive sealing that pressure is not less than 3Mpa, mechanical sealing static ring 12 inner chambers form by O shape circle and fixing major axis 2 cylindricals the static seal that is not less than 3Mpa, mechanical sealing static ring 12 is by the socket head screw of self, be fastened on fixedly on major axis 2, by round nut 13 is auxiliary, be fastened on fixedly on major axis 2 again, during motor rotation, mechanical sealing static ring 12 and fixing major axis 2 transfixions, drive sleeve 14 inner hole sleeves are contained on the external cylindrical surface of motor-hollow axle 1, by 10 sealings of two O-ring seals, with a key 19, with two socket head screws 7, be connected, play respectively transferring power and positioning action, during motor rotation, with motor, rotate, fitting tight circle pad 15 between drive sleeve 14 top endoporus and polished rod of screw pump 17, seal ring 16, nut plug 18, 4 apertures are arranged on nut plug 18, with the three-jaw of 3 pawl spanners, be inserted in any three holes, the fastening nut plug, jam-packed seal ring 16, realized the static seal between drive sleeve 14 and polished rod of screw pump 17, during motor rotation, this static seal is with electric machine rotation.

The present invention in use, by motor-hollow axle 1 top inner chamber, fixedly between the exocoel, drive sleeve 14 inner chambers, polished rod of screw pump 17 of major axis 2 inner chambers and top installation tool stationary seal ring 12 and rotating ring 11, formed the motive sealing cavity with mechanical sealing linkage ring 11 and mechanical sealing static ring 12, seal up the pressure of the crude oil that oil well draws up, particularly seal up because of downhole status diagnosis or processing accident, pressure when oil pipe need be suppressed high pressure, be generally below 3Mpa.

Claims

1. the sealing configuration on a vertical machine driving device for directly-driven screw pump, be provided with motor-hollow axle, fixedly major axis, deep groove ball bearing, lip-type packing, O-ring seals, mechanical seal lining, mechanical sealing linkage ring, mechanical sealing static ring, polished rod of screw pump, it is characterized in that the rotor core of fixed electrical machinery on motor-hollow axle, the inner chamber boss place of motor-hollow axle and the outer ring transition fit of deep groove ball bearing, fixedly the inner ring interference fit of the outer lug boss of major axis and deep groove ball bearing, have drain tap in the outside of motor-hollow axle, 3 seal with O rings for the inner chamber of mechanical seal excircle of bushing cylinder and motor-hollow axle, by screw and motor-hollow axle, locked together, mechanical seal lining endoporus and mechanical sealing linkage ring endoporus and fixedly major axis be large Spielpassung, lip-type packing is contained in the mechanical seal lining, cylindrical and mechanical seal lining are close together, endoporus lip limit contacts with fixing major axis cylindrical, mechanical sealing linkage ring is arranged in the mechanical seal lining, by stop pin, connected again, form the anti-rotation of sense of rotation, clean lubricating oil is arranged between plane on mechanical sealing static ring lower plane and mechanical sealing linkage ring, and under the pressure of mechanical sealing static ring spring close contact, formed the motive sealing that pressure is not less than 3Mpa, the mechanical sealing static ring inner chamber is become to be not less than the static seal of 3Mpa by O shape circle and fixing major axis outer ring, mechanical sealing static ring is by the socket head screw of self, be fastened on fixedly on major axis, by round nut is auxiliary, be fastened on fixedly on major axis again, the drive sleeve inner hole sleeve is contained on the external cylindrical surface of motor-hollow axle, by two O-ring seals sealings, with a key, with two socket head screws, be connected, fitting tight circle pad between drive sleeve top endoporus and polished rod of screw pump, seal ring, the nut plug, by the nut plug, fixed.