CN108258829A - Sand prevention piston for submersible linear motor - Google Patents
Sand prevention piston for submersible linear motor Download PDFInfo
- Publication number
- CN108258829A CN108258829A CN201611246489.6A CN201611246489A CN108258829A CN 108258829 A CN108258829 A CN 108258829A CN 201611246489 A CN201611246489 A CN 201611246489A CN 108258829 A CN108258829 A CN 108258829A
- Authority
- CN
- China
- Prior art keywords
- piston
- rear end
- clamping screw
- disc spring
- oil immersion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004576 sand Substances 0.000 title claims abstract description 16
- 230000002265 prevention Effects 0.000 title abstract 2
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000007654 immersion Methods 0.000 claims description 21
- 238000005086 pumping Methods 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims 1
- 239000010779 crude oil Substances 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 20
- 238000012856 packing Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012075 bio-oil Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
- H02K5/1285—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs of the submersible type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Actuator (AREA)
Abstract
The invention discloses a sand prevention piston for an oil-submersible linear motor, which comprises a front-end piston and a rear-end piston which are arranged in a motor shell, wherein the front-end piston and the rear-end piston are connected through a rotor shaft; the upper part of the rear-end piston is connected with the other end of the rotor shaft through a third piston nut and a first rear piston locking bolt which are matched with each other, the lower part of the rear-end piston is locked through a second rear piston locking bolt, and a buffer device is arranged between the free end of the second rear piston locking bolt and the lower part of the rear-end piston; sealing devices are arranged between the front end piston and the motor shell, and between the rear end piston and the motor shell. The invention has the dynamic sealing function of preventing crude oil carrying impurities from entering the motor, and improves the service life of the submersible linear motor.
Description
Technical field
The invention belongs to industrial gas oil DP technology technical fields, past suitable for being driven using oil immersion line motor
A kind of producing well of multiple pump lifting crude oil, and in particular to sand control piston for oil immersion line motor.
Background technology
Country's oil immersion line motor manufacturing process is using open type environment at present, that is, allow well liquid enter motor stator with
Mover gap does so the effect that can play cooling motor.But during oil immersion line motor work, electric mover drives oil pumping
Pump plunger moves reciprocatingly, due to including salt, sulfate reducing bacteria, CO in crude oil2And many corrosive deposits such as silt, crude oil
It takes impurity and enters motor cavity acceleration motor fret, easily cause electric motor short circuit and burn.
Invention content
The purpose of the present invention is to provide a kind of sand control piston for oil immersion line motor, to overcome the above-mentioned prior art
There are the defects of, the present invention as connect mover axis upper and lower side active unit, playing, which prevents crude oil from taking impurity, enters in motor
The dynamic sealing effect in portion, improves the oil immersion line motor service life.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of sand control piston for oil immersion line motor is lived including the forward bolt piston being arranged in motor housing and rear end
Plug, and forward bolt piston and rear end piston be by mover axis connection, the first piston spiral shell that the top of forward bolt piston passes through mutual cooperation
Female and the first secondary piston clamping screw is connected with pump rod of pumping, the second piston spiral shell that the lower part of forward bolt piston passes through mutual cooperation
Female and the second secondary piston clamping screw is connect with the upper end of mover axis；
The top of rear end piston passes through piston clamping screw after the third piston unt of mutual cooperation and first and mover axis
Lower end connection, the lower part of rear end piston locks that bolt lock is tight by piston after second, and after second piston clamping screw from
By being equipped with buffer unit between end and the lower part of rear end piston；
Sealing device is equipped between forward bolt piston and rear end piston and motor housing.
Further, after the buffer unit includes being arranged on the disc spring of rear end piston base, and disc spring is set in second
On piston clamping screw.
Further, the bottom of disc spring is provided with the first disc spring baffle, is set between piston clamping screw after disc spring and second
There is the second disc spring baffle.
Further, cushion pad is equipped with after the first disc spring baffle and second between the free end of piston clamping screw.
Further, the sealing device includes several lip-shaped sealed rings and the Si Te being made of O-ring and Ge Lai circles
Envelope.
Further, be all provided between forward bolt piston and rear end piston and motor housing there are two lip-shaped sealed ring and two this
Spy's envelope.
Further, lip-shaped sealed ring and Si Te envelopes are alternately arranged.
Compared with prior art, the present invention has technique effect beneficial below：
The present invention passes through setting by installing forward bolt piston and rear end piston additional in oil-submersible linear electric motor mover axis upper and lower ends
Forward bolt piston and rear end piston collective effect, can prevent crude oil from taking impurity and enter inside motor, improve motor sealing performance, prolong
Oil immersion line motor service life has been grown, has used open type environment compared to current domestic oil immersion line motor manufacturing process, i.e.,
Mover axis upper and lower ends do not install dynamic sealing additional, extend the motor operation service life.
Further, using disc spring, baffle and cushion pad as buffer unit relative to being welded on motor lower end before
Helical spring buffer unit on plug was avoided because of mover impact force excessive the problem of spring is caused to break, come off.
Further, sealing combination device is used as relative to before using single sealing using lip-shaped sealed ring and Si Te envelopes
Device improves sealing performance, extends Sealing period.
Description of the drawings
Fig. 1 is oil immersion line motor front end sand control piston sectional view；
Fig. 2 is oil immersion line motor rear end sand control piston sectional view.
Wherein, 1, oil pumping pump rod, 2, first piston nut, 3, forward bolt piston, 4, lip-shaped sealed ring, the 5, second secondary piston
Clamping screw, 6, second piston nut, 7, mover axis, the 8, first secondary piston clamping screw, 9, motor housing, 10, O-ring, 11,
Lattice enclose, and 12, rear end piston；13rd, piston clamping screw after second；14th, third piston unt；15th, disc spring；16th, the first disc spring
Baffle；17th, cushion pad；18th, the second disc spring baffle；19th, piston clamping screw after first.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
Such as Fig. 1 and Fig. 2, a kind of sand control piston for oil immersion line motor, including the front end being arranged in motor housing 9
Piston 3 and rear end piston 12, and forward bolt piston 3 and rear end piston 12 are connected by mover axis 7, the top of forward bolt piston 3 passes through
The 2 and first secondary piston clamping screw 8 of first piston nut of mutual cooperation is connected with oil pumping pump rod 1, the lower part of forward bolt piston 3
It is connect by the 6 and second secondary piston clamping screw 5 of second piston nut of mutual cooperation with one end of mover axis 7；
After the third piston unt 14 and first that the top of rear end piston 12 passes through mutual cooperation piston clamping screw 19 with
The other end connection of mover axis 7, the lower part of rear end piston 12 are locked, and piston after second by piston clamping screw 13 after second
Buffer unit is equipped between the free end of clamping screw 13 and the lower part of rear end piston 12, the buffer unit is included after being arranged on
Hold the disc spring 15 of piston 12 bottom, and disc spring 15 be set in second after on piston clamping screw 13, the bottom of disc spring 15 is provided with
First disc spring baffle 16 is equipped with 18 first disc spring baffle of the second disc spring baffle after disc spring 15 and second between piston clamping screw 13
Cushion pad 17 is equipped with after 16 and second between the free end of piston clamping screw 13；
Sealing device is equipped between forward bolt piston 3 and rear end piston 12 and motor housing 9, if the sealing device includes
Dry lip-shaped sealed ring 4 and this spy's envelope being made of O-ring 10 and Ge Lai circles 11, forward bolt piston 3 and rear end piston 12 and motor
It is all provided between shell 9 there are two lip-shaped sealed ring 4 and two this spy's envelopes, and lip-shaped sealed ring 4 and Si Te envelopes are alternately arranged.
It is described further with reference to specific embodiment：
Fig. 1 is in the forward bolt piston 3 of 9 interior design of motor housing of oil immersion line motor and oil pumping pump rod 1 and motor
Mover axis 7 connects sectional view, and 3 upper end of forward bolt piston passes through 2 and first secondary piston clamping screw 8 of first piston nut and oil well pump
Pull rod 1 connects, and 3 lower end of forward bolt piston is connect by 6 and second secondary piston clamping screw 5 of second piston nut with mover axis 7, preceding
Hold this spy's envelope movable sealing structure equipped with 11 combination of two groups of lip-type packings 4 and O-ring 10 and Ge Lai circle on piston 3.
The sectional view that Fig. 2 is connect for the rear end piston 12 of 9 interior design of motor housing in oil-submersible linear with mover axis 7,
Piston 12 upper end in rear end is connect by piston clamping screw 19 after third piston unt 14 and first with mover axis 7, rear end piston
12 lower ends devise the buffer unit that disc spring 15, the first disc spring baffle 16, the second disc spring baffle 18, cushion pad 17 combine, and pass through
Piston clamping screw 13 is fixed after second.Designing with forward bolt piston 3, two groups of lip-type packings 4 are housed on rear end piston 12
And this spy's envelope movable sealing structure of 11 combination of O-ring 10 and Ge Lai circles.
The present invention installs forward bolt piston 3 additional in oil-submersible linear electric motor mover axis upper and lower ends and rear end piston 12, the two are total to
Same-action prevents from crude oil from taking impurity entering inside motor, improves motor sealing performance.Forward bolt piston 3 and rear end piston 12 and electricity
Lip-type packing 4 and Si Te envelopes are both provided between machine shell 9.
1. lip-type packing
Lip packing makes close by radial load caused by the interference volume and working medium pressure of sealing lip, that is, self-tightening effect
Sealing generates flexible deformation, blocks and leaks out gap, reaches sealing purpose.Common sealing material has rubber, leather, polytetrafluoroethylene (PTFE)
Deng.It is 0.01~0.6m/s to use nitrile rubber making, and it is 0.05~0.1m/s to use polyurethane rubber making, using fluorine
Rubber making is 0.05~0.3m/s.
Lip-type packing is affixed on sealing pair coupled face by the lip of its opening.During without internal pressure, only because of the deformation of procheilon
And generate the contact of very little.In the case of sealing, have and pressure medium phase on the every bit that is contacted with sealing medium
Deng normal pressure, so lip-type packing bottom will be axially compressed, lip is contacted change with sealing surface by circumferential compression
Width, while contact stress increases.When internal pressure increases again, the distribution form and size of contact further change, lip with
Sealing surface cooperation is closer, so better tightness, here it is " self-tightenings " of lip-shaped ring.One lip-type packing can be effective
The high pressure for sealing 32MPa.
2. this spy's envelope
Si Te is sealed by the filled polytetrafluoroethylene rectangular seal ring (lattice to enclose 11) of a low friction and a caoutchouc elasticity
Body (O-ring 10) forms, and the sealing function in high-pressure system oil cylinder, servo-cylinder for straight reciprocating motion, is two-way work
With element, the high-pressure system moved back and forth suitable for high-speed straight-line.
Lattice enclose 11 working conditions as operating pressure≤80MPa, reciprocating speed≤15m/s, operating temperature -45~200 DEG C,
Working media is petroleum base hydraulic oil, fire resistant hydraulic fluid, Environmental Safety liquid (bio oil), water etc.；Lattice enclose 11 accurate sealing properties
It is good, allow larger extrusion space；Minimum startup and kinetic friction force or even also ensure even running, nothing under the low speed
Creeping phenomenon；Wear-resistant, anti-extrusion, high temperature resistant, long lifespan；Due to the sealing structure of special shape, there is good oil film to return
Oily characteristic；Dimensionally stable is not affected by temperature.
It is by installing this spy's envelope additional in electric mover axis upper and lower ends, i.e., real using different types of sealing ring combining form
It is that the sealing ranges of instability of various sealing rings is overlapped mutually on border, mutually makes up, i.e., is existed with the method for series connection to improve mover axis
Dynamic sealing performance in reciprocatory movement.
Claims (7)
1. a kind of sand control piston for oil immersion line motor, which is characterized in that including the front end being arranged in motor housing (9)
Piston (3) and rear end piston (12), and forward bolt piston (3) and rear end piston (12) are connected by mover axis (7), forward bolt piston
(3) top passes through the first piston nut (2) of mutual cooperation and the first secondary piston clamping screw (8) and oil pumping pump rod (1)
Be connected, the lower part of forward bolt piston (3) by the second piston nut (6) of mutual cooperation and the second secondary piston clamping screw (5) and
The upper end connection of mover axis (7)；
The top of rear end piston (12) passes through piston clamping screw (19) after the third piston unt (14) of mutual cooperation and first
It is connect with the lower end of mover axis (7), the lower part of rear end piston (12) is locked, and second by piston clamping screw (13) after second
Buffer unit is equipped between the free end of piston clamping screw (13) and the lower part of rear end piston (12) afterwards；
Sealing device is equipped between forward bolt piston (3) and rear end piston (12) and motor housing (9).
A kind of 2. sand control piston for oil immersion line motor according to claim 1, which is characterized in that the buffering dress
Put the disc spring (15) including being arranged on rear end piston (12) bottom, and disc spring (15) be set in second after piston clamping screw (13)
On.
3. a kind of sand control piston for oil immersion line motor according to claim 2, which is characterized in that disc spring (15)
Bottom is provided with the first disc spring baffle (16), and being equipped with the second disc spring between piston clamping screw (13) after disc spring (15) and second keeps off
Plate (18).
4. a kind of sand control piston for oil immersion line motor according to claim 3, which is characterized in that the first disc spring is kept off
Cushion pad (17) is equipped with after plate (16) and second between the free end of piston clamping screw (13).
A kind of 5. sand control piston for oil immersion line motor according to claim 1, which is characterized in that the sealing dress
It puts including several lip-shaped sealed rings (4) and is sealed by O-ring (10) and lattice to enclose this spy that (11) form.
A kind of 6. sand control piston for oil immersion line motor according to claim 5, which is characterized in that forward bolt piston
(3) lip-shaped sealed ring (4) and two this spy's envelopes there are two being all provided between rear end piston (12) and motor housing (9).
A kind of 7. sand control piston for oil immersion line motor according to claim 5, which is characterized in that lip-shaped sealed ring
(4) it is alternately arranged with this spy's envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611246489.6A CN108258829A (en) | 2016-12-29 | 2016-12-29 | Sand prevention piston for submersible linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611246489.6A CN108258829A (en) | 2016-12-29 | 2016-12-29 | Sand prevention piston for submersible linear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258829A true CN108258829A (en) | 2018-07-06 |
Family
ID=62719980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611246489.6A Pending CN108258829A (en) | 2016-12-29 | 2016-12-29 | Sand prevention piston for submersible linear motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108258829A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2564777Y (en) * | 2002-07-16 | 2003-08-06 | 姜树文 | Oil-submersible electric piston pump |
| CN101409495A (en) * | 2008-10-30 | 2009-04-15 | 深圳市大族精密机电有限公司 | Oil-submersible linear motor |
| CN201513561U (en) * | 2009-10-30 | 2010-06-23 | 段黎明 | Hydraulic sealing pressure buffering filter |
| CN203641515U (en) * | 2014-01-16 | 2014-06-11 | 株洲时代新材料科技股份有限公司 | Hydraulic cylinder piston rod seal structure |
| CN104632139A (en) * | 2013-11-13 | 2015-05-20 | 中国石油天然气股份有限公司 | Rodless oil extraction device driven by underground permanent magnet linear motor |
| CN205331119U (en) * | 2016-02-02 | 2016-06-22 | 株洲联诚集团减振器有限责任公司 | Hydrocylinder |
| CN206461467U (en) * | 2016-12-29 | 2017-09-01 | 中国石油天然气股份有限公司 | Sand prevention piston for submersible linear motor |
-
2016
- 2016-12-29 CN CN201611246489.6A patent/CN108258829A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2564777Y (en) * | 2002-07-16 | 2003-08-06 | 姜树文 | Oil-submersible electric piston pump |
| CN101409495A (en) * | 2008-10-30 | 2009-04-15 | 深圳市大族精密机电有限公司 | Oil-submersible linear motor |
| CN201513561U (en) * | 2009-10-30 | 2010-06-23 | 段黎明 | Hydraulic sealing pressure buffering filter |
| CN104632139A (en) * | 2013-11-13 | 2015-05-20 | 中国石油天然气股份有限公司 | Rodless oil extraction device driven by underground permanent magnet linear motor |
| CN203641515U (en) * | 2014-01-16 | 2014-06-11 | 株洲时代新材料科技股份有限公司 | Hydraulic cylinder piston rod seal structure |
| CN205331119U (en) * | 2016-02-02 | 2016-06-22 | 株洲联诚集团减振器有限责任公司 | Hydrocylinder |
| CN206461467U (en) * | 2016-12-29 | 2017-09-01 | 中国石油天然气股份有限公司 | Sand prevention piston for submersible linear motor |
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