CN206054261U - A kind of sealer of oil immersion line motor - Google Patents

Abstract

This utility model is related to a kind of sealer of oil immersion line motor, the sealer includes that one end is connected with outer tube, seal shaft and the black box of oil well pump coupling head, the seal shaft is actively located in the outer tube, the black box is arranged between the seal shaft and outer tube, and the black box includes strike-off device, at least one oil-free bushing part and at least one seal member.In seal shaft reciprocatory movement, prevent the fine sand in well liquid from entering sealer by sand control device；Oil-free bushing part can play support guide effect, and can lubricate the abrasion for reducing seal shaft surface；The seal member for contacting with seal shaft simultaneously can either prevent well liquid from permeating, and will not damage seal shaft again, can guarantee good sealing effectiveness for a long time, substantially prolongs the service life of sealer.

Description

A kind of sealer of oil immersion line motor

Technical field

This utility model is related to submersible electric machine with oil field, and in particular to a kind of sealer of oil immersion line motor.

Background technology

Oil immersion line motor oil extraction system, mainly includes latent oil formula linear electric motors, oil pumping of the integral installation in underground at present Pump, sealer and respiratory organ., located at the top of latent oil formula linear electric motors, respiratory organ is under latent oil formula linear electric motors for oil well pump Side, sealer are located between oil well pump and latent oil formula linear electric motors.The working environment very severe of oil immersion line motor, in well liquid Containing acid-base material, fine sand etc..If the working life of whole oil extraction system will be greatly shortened into motor internal.Additionally, by Vary in oil well hole condition, there is very big difficulty on material is selected.

Existing sealer is not reasonable because of the friction pair for adopting, and occurs as soon as serious after causing seal shaft work a period of time Wear phenomenon.Once the fineness on seal shaft surface does not reach requirement, by breakseal part, make sealer not have sealing and make With.Therefore, oil immersion line motor needs a kind of more reliable sealer.

Utility model content

The technical problems to be solved in the utility model is, there is provided a kind of sealer of oil immersion line motor, can overcome Existing sealer is not reasonable due to the friction pair for adopting, and seal shaft occurs as soon as wear phenomenon after work a period of time, close After the surface abrasion of envelope axle, by breakseal part, the defect for causing sealing function to fail.

This utility model solves the technical scheme adopted by its technical problem：A kind of sealing of oil immersion line motor is provided Device, the sealer include that one end is connected with outer tube, seal shaft and the black box of oil well pump coupling head, the seal shaft activity It is arranged in the outer tube, the black box is arranged between the seal shaft and outer tube, the black box includes strike-ofing Device, at least one oil-free bushing part and at least one seal member.

Further, the seal member include it is U-shaped circle retainer ring, at least one be resisted against it is described it is U-shaped circle retainer ring with U-shaped sealing ring and at least one between seal shaft is resisted against the O-shaped sealing between the U-shaped circle retainer ring and the outer tube Circle.

Further, the U-shaped circle retainer ring includes retainer ring, lower retainer ring and middle retainer ring, middle fixed Ring is formed between upper retainer ring, lower retainer ring respectively for placing the first groove of the U-shaped sealing ring.

Further, the outer wall of fixed ring and the lower retainer ring is further opened with for placing the O-shaped sealing Second groove of circle.

Further, fixed ring and the lower retainer ring are symmetrical structure.

Further, the device of strike-ofing is arranged on the outer tube and goes back on one end of oil well pump coupling head, the outer tube Mudhole is offered, the device of strike-ofing is struck off the impurity on the seal shaft is sticked to, and impurity is discharged from the mudhole.

Further, the device of strike-ofing includes sand control retainer ring and is resisted against between sand control retainer ring and the seal shaft Sand prevention seal circle.

Further, the oil-free bushing part includes bushing retainer ring and is resisted against bushing retainer ring with the seal shaft Between oil-free bushing.

Further, the seal member is two, and the oil-free bushing part is three, two seal members and three The spaced setting of oil-free bushing part, is additionally provided with two fixing nuts in the outer tube, two fixing nuts by seal member and Oil-free bushing part is fixed in the outer tube.

Further, the outer surface of the seal shaft is smooth chromium plating cure process layer, and the inner surface of the outer tube is Smooth chromium plating cure process layer.

The beneficial effects of the utility model are, in seal shaft reciprocatory movement, to prevent well liquid by sand control device In fine sand will not enter sealer；Oil-free bushing part can play support guide effect, and can lubricate reduction seal shaft surface Abrasion；The seal member for contacting with seal shaft simultaneously can either prevent well liquid from permeating, and will not damage seal shaft again, when can be long Between guarantee good sealing effectiveness, substantially prolongs the service life of sealer.

Description of the drawings

Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：

Fig. 1 is the sealer cross-sectional schematic of oil immersion line motor of the present utility model；

Fig. 2 is A portions close-up schematic view in Fig. 1；

Fig. 3 is B portions close-up schematic view in Fig. 1.

Specific embodiment

In conjunction with accompanying drawing, preferred embodiment of the present utility model is elaborated.

As shown in figure 1, a kind of sealer of oil immersion line motor of the present utility model, sealer includes that one end is connected with and takes out The outer tube 200 of oil pump coupling head 100, seal shaft 300 and black box 400.Seal shaft 300 is actively located in outer tube 200, close Sealing assembly 400 is arranged between seal shaft 300 and outer tube 200.Black box 400 includes strike-off device 410, at least one oil-free lining Set part 420 and at least one seal member 430.In 300 reciprocatory movement of seal shaft, prevented by sand control device 410 Fine sand in well liquid will not enter sealer；Oil-free bushing part 420 can play support guide effect, and it is close to lubricate reduction The abrasion on 300 surface of envelope axle；The seal member 430 for contacting with seal shaft 300 simultaneously can either prevent well liquid from permeating, and will not damage again Hinder seal shaft 300, good sealing effectiveness can be guaranteed for a long time, the service life of sealer is substantially prolongs.

As shown in Fig. 2 device 410 of strike-ofing is arranged on outer tube 200 going back on one end of oil well pump coupling head 100, outer tube 200 Mudhole 210 is offered, device 410 of strike-ofing is struck off the impurity on seal shaft 300 is sticked to, impurity is simultaneously discharged from mudhole 210. The sand prevention seal circle that device 410 of strike-ofing includes sand control retainer ring 411 and is resisted against between sand control retainer ring 411 and seal shaft 300 412.In the present embodiment, seal member 430 is two, and oil-free bushing part 420 is three, two seal members 430 and three The 420 spaced setting of individual oil-free bushing part, so can provide multilamellar protection for seal shaft 300, improve the sealing of sealer Property.Two fixing nuts 1 are additionally provided with outer tube 200, seal member 430 and oil-free bushing part 420 are fixed by two fixing nuts 1 In outer tube 200.

As shown in figure 3, oil-free bushing part 420 includes bushing retainer ring 421 and is resisted against bushing retainer ring 421 with sealing Oil-free bushing 422 between axle 300.Oil-free bushing 422 can play support guide effect, and can lubricate reduction 300 table of seal shaft The abrasion in face, so that it is guaranteed that the fineness on 300 surface of seal shaft.

Seal member 430 includes that U-shaped circle retainer ring 431, at least one is resisted against U-shaped circle retainer ring 431 and seal shaft 300 Between U-shaped sealing ring 432 and at least one be resisted against the O-ring seal between U-shaped circle retainer ring 431 and outer tube 200 433.In the present embodiment, U-shaped sealing ring 432 is two, and which has the sealing lip of balanced configuration, can be formed in seal clearance Good lubricating oil film, with good corrosion-resistant and anti-wear performance.U-shaped circle retainer ring 431 includes retainer ring 431a, lower solid Determine ring 431c and middle retainer ring 431b.Upper retainer ring 431a and lower retainer ring 431c are symmetrical structure, middle fixed The formation two between upper retainer ring 431a, lower retainer ring 431c is used for the first grooves for placing U-shaped sealing ring to ring 431b respectively. The outer wall of upper retainer ring 431a and lower retainer ring 431c is further opened with for placing the second groove of O-ring seal 433.Certainly, Upper retainer ring 431a and lower retainer ring 431c can also be dissymmetrical structure, specifically should be carried out according to the shape of U-shaped sealing ring 432 Arrange.

Above-mentioned U-shaped circle retainer ring 431 is formed by several detached unit constructions, and U-shaped sealing ring 432 can be subject to upper retainer ring 431a and the extruding of lower retainer ring 431c, tightly embrace seal shaft 300 so as to produce deformation, prevent well liquid from passing through seal shaft 300 Surface is entered inside submersible electric machine with oil.Meanwhile, O-ring seal 433 is in pressure fluid, 200 inwall of U-shaped circle retainer ring 431 and outer tube Common extruding under, produce very big deformation, so as to prevent the infiltration of pressure fluid.Due to U-shaped sealing ring 432 and O-shaped sealing Circle 433 has deformation, therefore seal member 430 has self-compensating function, i.e., in the case where there is abrasion, meeting automatic spring is embraced Tightening seal axle 300, can ensure there is good sealing effectiveness with seal shaft 300 always.

Specifically, U-shaped sealing ring 432 adopts fluorubber material (such as politef), long service life both not to damage Seal shaft 300, can guarantee good sealing effectiveness again for a long time.In order to prevent seal shaft 300 from wearing and tearing, outside seal shaft 300 Surface is smooth chromium plating cure process layer, it is ensured that its fineness.The inner surface of outer tube 200 is smooth chromium plating cure process Layer, it is ensured that its fineness.Certainly, the outer surface of seal shaft 300 can also cure process by another way, such as nitridation, High-frequency quenching etc. is processed.

Refer in the following manner to assemble sealer：Oil-free bushing 422 is pressed in bushing retainer ring 421, oil-free Sleeve member 420 and seal member 430 are all applied to be spread grease and is installed in sealer outer tube 200, and then two ends are locked respectively Fixing nut 1；Sand prevention seal circle 412 is fitted into after sand control retainer ring 411, then whole sand control device 410 is screwed in outer tube 200 At corresponding screw thread；Finally oil well pump coupling head is threadedly coupled with outer tube 200, the insertion of seal shaft 300 is completed into assembling.

It should be appreciated that above example is only to illustrate the technical solution of the utility model, it is rather than a limitation, right For those skilled in the art, the technical scheme described in above-described embodiment can be modified, or to which part skill Art feature carries out equivalent；And all such modifications and replacement, should all belong to the protection of this utility model claims Scope.

Claims (10)

1. a kind of sealer of oil immersion line motor, the sealer include that one end is connected with the outer tube of oil well pump coupling head, close Envelope axle and black box, the seal shaft are actively located in the outer tube, the black box be arranged at the seal shaft with Between outer tube, it is characterised in that the black box include strike-ofing device, at least one oil-free bushing part and at least one is close Envelope part.

2. according to the sealer of the oil immersion line motor described in claim 1, it is characterised in that the seal member includes U-shaped circle Retainer ring, at least one are resisted against the U-shaped sealing ring between the U-shaped circle retainer ring and seal shaft and at least one are resisted against O-ring seal between the U-shaped circle retainer ring and the outer tube.

3. according to the sealer of the oil immersion line motor described in claim 2, it is characterised in that the U-shaped circle retainer ring includes Retainer ring, lower retainer ring and middle retainer ring, middle retainer ring are formed for putting between upper retainer ring, lower retainer ring respectively Put the first groove of the U-shaped sealing ring.

4. according to the sealer of the oil immersion line motor described in claim 3, it is characterised in that fixed ring and described lower solid The outer wall for determining ring is further opened with for placing the second groove of the O-ring seal.

5. according to the sealer of the oil immersion line motor described in claim 3, it is characterised in that fixed ring and described lower solid Ring is determined for symmetrical structure.

6. according to the sealer of the oil immersion line motor described in claim 1, it is characterised in that the device of strike-ofing is arranged on described outer Cylinder is further opened with mudhole near one end of oil well pump coupling head on the outer tube, the device of strike-ofing will stick to the sealing Impurity on axle strikes off, and impurity is discharged from the mudhole.

7. according to the sealer of the oil immersion line motor described in claim 6, it is characterised in that the device of strike-ofing includes that sand control is fixed Ring and the sand prevention seal circle being resisted against between sand control retainer ring and the seal shaft.

8. according to the sealer of the oil immersion line motor described in any one in claim 1 to 7, it is characterised in that the oil-free The oil-free bushing that sleeve member includes bushing retainer ring and is resisted against between bushing retainer ring and the seal shaft.

9. according to the sealer of the oil immersion line motor described in claim 8, it is characterised in that the seal member is two, institute Oil-free bushing part is stated for three, two seal members and the spaced setting of three oil-free bushing parts, in the outer tube and also Two fixing nuts are provided with, two fixing nuts are fixed on seal member and oil-free bushing part in the outer tube.

10. according to the sealer of the oil immersion line motor described in claim 1, it is characterised in that the outer surface of the seal shaft is Smooth chromium plating cure process layer, the inner surface of the outer tube is smooth chromium plating cure process layer.