CN86108707A - Oil-immersed pump - Google Patents
Oil-immersed pump Download PDFInfo
- Publication number
- CN86108707A CN86108707A CN 86108707 CN86108707A CN86108707A CN 86108707 A CN86108707 A CN 86108707A CN 86108707 CN86108707 CN 86108707 CN 86108707 A CN86108707 A CN 86108707A CN 86108707 A CN86108707 A CN 86108707A
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- China
- Prior art keywords
- stator
- impeller
- moving vane
- pump
- blade
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Abstract
Oil-immersed pump of the present invention is a kind of multistage centrifugal pump that is mainly used in recover petroleum, it is made up of the rotary blade that includes several blades separately and static two critical pieces of stator, adopt Theory of Three-dimensional Flowing design blade and flow channel shape, it is close with the stator axial length to have impeller on the structure, moving vane has the outlet prolonged section, characteristics such as stator stator blade cornerite is little, and single-stage length weak point and outside dimension are little.Compare with existing like product.It is about 25% that oil-immersed pump single-stage pump lift of the present invention improves, and it is about 8% that pump efficiency improves, and cost reduces about 30%.
Description
What the present invention relates to is a kind of small-bore, multistage centrifugal pump, is mainly used in recover petroleum, promptly directly slips into 1 km to 3 km down-hole, and crude oil is extracted out, also can be used for other carries out high-pressure delivery to liquid occasion.
Typical single-stage oil-immersed pump is made up of impeller and two major components of stator, and accompanying drawing 1 is a single-stage oil-immersed pump structure of the present invention.Impeller (1) comprises front shroud (2), moving vane (3) and back shroud (4), and it is fixed on the major axis (5), and by oil-submersible motor (not drawing among the figure) rotary driving, the work done of moving vane convection cell forms lift.Stator (6) part is a fixed block, comprises pump case (7), stator blade (8) and interior hub (9).Interior hub (9) is the supporting position of axle (5).The effect of stator blade has two, and the first imports the import of next stage impeller to the fluid that flows out from the previous stage impeller, and it two is that fluid is changed into static pressure from the kinetic energy that impeller obtains.Between impeller and stator, be added with preceding thrust washer (10) and back thrust washer (11).
The prior art of oil-immersed pump can be an example with China's patent 85202072, comprises the at present domestic and international product of this patent, and its impeller and stator all are to adopt monobasic flow theory and the design of semiempirical modeling method.Their ubiquities following shortcoming: (1) hydraulic efficiency is not high, and the pump power consumption is many; (2) single-stage (the one-level impeller adds the one-level stator and forms a single-stage) lift is not high, and under the condition of given full pumping head, required pump stage number is many; (3) pump housing boundary dimension is big.U.S.'s oil-immersed pump external diameter of introducing as China is 89 millimeters, when in general 139.7 millimeters (5.5 inches) oil wells of China, using, and the normal difficulty of going into the well because of the straight generating pump of well head.
The objective of the invention is above-mentioned shortcoming, improve the structure of impeller and stator, improve the efficient and the single-stage lift of pump, reduce power consumption, reduce the external diameter and the length dimension of the pump housing simultaneously, the technical and economic performance of oil-immersed pump is significantly improved at oil-immersed pump.
At first, the three-dimensional flow theory of turbomachines that we found according to China scientist professor Wu Zhonghua, fluid in the pump is made complete ternary, the calculating of separated flow is arranged, analyze the velocity flow profile state at least 25 streamlines (but 100 streamlines of as many as) in the runner, select the best runner-type line and the distortion rule of moving vane and stator blade thus, obtain the ternary blade profile of flow losses minimum at last.The present invention has improved the structure of impeller and stator, adopted the optimum ratio of definite impeller moving vane length and impeller outer diameter, prolong moving vane outlet end length, shorten the axial length of stator, reduce stator stator blade cornerite, and reduce technical measures such as impeller moving vane number and stator stator blade number, techno-economic effects such as making oil-immersed pump of the present invention have single-stage lift height, efficient height, save energy, boundary dimension is little.
Describe content of the present invention in detail below in conjunction with accompanying drawing.
1. strengthened impeller moving vane axial length B
RWith its external diameter φ
RRatio.As shown in Figure 2, be the sectional view of impeller of the present invention (a), curve ab, the ef among the figure represents have separated flow to calculate the runner-type line of the best moving vane of determining (3) according to ternary, hg represents the appearance curve of front shroud (2), B
RThe axial length of expression impeller moving vane (3), φ
RThe expression impeller outer diameter.The impeller of Fig. 2 (b) expression prior art product is analysed and observe its label symbol (B
R', φ
R' etc.) corresponding every identical among implication and (a), it is to be noted that its moving vane is to adopt the monobasic Design Theory that flows.
Comparison diagram 2 it (a) with (b) as seen: the axial length B of (1) impeller moving vane of the present invention
RImpeller moving vane axial length B much larger than prior art
R' (be B
R＞＞B
R'); (2) impeller moving vane length B of the present invention
RWith impeller outer diameter φ
RRatio: B
R/ φ
R=0.3-0.4 is than this ratio height of prior art, B in the prior art
R'/φ
R'＜0.25.
As seen from Figure 2, the thin portion difference of two kinds of impellers also is clearly: (1) impeller moving vane of the present invention import wheel hub radius reduces, i.e. φ
a＜φ
a'; (2) moving vane outlet edge fb reduces with angle α perpendicular to the plane of impeller axis, i.e. α＜α '; (3) moving vane extends into the ternary distorted shape towards import vertically.
This structural design of the present invention reduces the diffusion gradient of fluid in impeller, and the relative velocity of inlet descends, thereby has reduced impact and the separation losses of fluid to impeller, has improved hydraulic efficiency.
2. increase moving vane length and improve lift.According to common theory, under external diameter, rotating speed and the blade exit corner condition determined, lift of pump is certain.The present invention is unconventional this traditional view has improved lift of pump by increasing moving vane length.
As shown in Figure 3, the present invention extends the outlet limit of moving vane (3) downstream: export the K point certainly at front shroud (2), extend to l along being parallel to pump shaft line direction; Certainly export the n point at back shroud (4), extend to m naturally along the back shroud meridian surface shape, for the safety that guarantees to move, the axial clearance of lm and stator stator blade inlet side must not be less than the thickness of back thrust washer (11).At impeller outer diameter φ
RUnder the constant condition of blade outlet angle, increased this piece blade area of klmn, it can improve lift of pump effectively.In an embodiment of the present invention, this improvement makes lift improve about 30%.
3. shorten the axial length of stator.Accompanying drawing 4 is comparisons of the present invention and prior art product stator axial length.
The prior art design it has been generally acknowledged that: higher level's stator shortens can worsen subordinate's inlet flow, reduces pump efficiency.We think, when the design of stator stator blade is improved, can not shorten the deterioration that causes subordinate's inlet flow because of axial length.
Shortened stator stator blade axial length B among the present invention
D, it and moving vane axial length B
RRatio B
D/ B
R=0.8-1.The product of prior art, this ratio are B
D'/B
R'=1.4-2.4.Owing to dwindled the stator blade axial length B greatly
DAlthough, the moving vane axial length B
RIncreased, single-stage pump total length of the present invention (equaling axial gap sum between moving vane, stator blade length and blade) has shortened the 3-10 millimeter than the like product of prior art, and this will make the weight of pump and manufacture cost reduce.
4. adopt little stator stator blade cornerite.The circumferential angular breadth that stator blade occupied is called subtended angle of blade.This is that the present invention is in order to reduce flowage friction drag losses in the stator, to improve one of measure of pump efficiency.Among the present invention, stator stator blade cornerite △ φ=40 °-60 °, adjacent blades overlapping angle is 0 °-15 °.
5. reduce impeller moving vane number and stator stator blade number.In the prior art product, moving vane is counted Z
R'=7-9, stator blade is counted Z
D'=7-9.Among the present invention, moving vane is counted Z
R=5-6, stator blade is counted Z
D=5-7.
Comparative trial proves, reduces the number of blade and can not reduce pump performance, but is convenient to manufacturing, and has alleviated weight.
Description of drawings:
Fig. 1 single-stage oil-immersed pump of the present invention structure.
Fig. 2 impeller moving vane axial length changes contrast.(a)-the present invention among the figure; (b)-existing procucts.
The outlet of Fig. 3 impeller moving vane increases length.
Fig. 4 stator stator blade axial length changes contrast.(a)-the present invention among the figure; (b)-existing procucts.
The moving vane that adopts among the present invention and stator blade all are the three-dimensional space distortions, if use the routine casting method, will be difficult to extract casting core, must adopt the complicated technologies such as urea core. The present invention then produces respectively the each several part of impeller and stator with a kind of assembling die, with special process it is made up then, adopts the precision pouring method, casts out shape in strict conformity with impeller and the stator of designing requirement.
One embodiment of the present of invention are as follows:
Shown in Fig. 2 (a),
Impeller outer diameter φ
R=80
Pump case external diameter φ=85 millimeters,
The moving vane axial length B
R=26 millimeters,
The ratio of moving vane axial length and impeller outer diameter
B
R/φ
R＝0.325;
As shown in Figure 3,
Moving vane outlet prolonged section kn=3 millimeter,
The lm=6 millimeter,
Moving vane is counted Z
R=5;
As accompanying drawing 4(a) shown in,
The stator blade axial length B
D=26 millimeters,
The stator blade axial length B
DWith the moving vane axial length B
RRatio B
D/ B
R=1,
Single-stage length L=65 millimeter,
Stator blade is counted Z
D=7,
Stator blade cornerite △ φ=40 °,
Circumferentially overlap 11.4 ° at angle of adjacent blades.
The single-stage pump of the embodiment of the invention and the like product DN4000 of U.S. TRW REDA company type single-stage pump, the test data of contrast test on same testing stand (seeing Table 1) can illustrate resultant effect of the present invention.
Table 1.
The DN4000 of the present invention of project unit
Pump discharge cubic meter/day 550 550
Single-stage lift rice 3.5 2.8
Efficiency of pump % 63 55
Pump case external diameter millimeter 85 89
Single-stage length millimeter 65 75
When pump lift required to be 1000 meters, whole oil-immersed pump needed to form by 286 grades by the embodiment of the invention, 18.6 meters of whole pump total lengths. If adopting U.S. DN4000 type dives Oil pump then needs 357 grades, and whole pump total length reaches 26.8 meters. Estimate that oil-immersed pump cost of the present invention can reduce by 30% than the DN4000 type.
Because oil-immersed pump efficient of the present invention is higher by 8% than U.S.'s DN4000 type, estimate that a pump operation can economize on electricity more than 50000 degree than U.S.'s pump in 1 year.
Claims (1)
1, a kind ofly forms a single-stage, link to each other and with motor-driven, impeller moving vane [3] and stator stator blade [8] are the oil-immersed pumps of ternary blade profile, it is characterized in that by some single-stages by an impeller [1] and [6] two major components of a stator
(1) axial length B of impeller
RWith impeller outer diameter φ
RRatio B
R/ φ
R=0.3-0.4,
(2) prolonged section [klmn] outside impeller moving vane [3] the outlet oriented back shroud of impeller in limit [4], the formation of this prolonged section is to guarantee impeller outer diameter φ
RConstant, at front shroud [2] exit point K, extend to l along being parallel to pump shaft line direction, at back shroud [4] exit point n, extend to m naturally along the back shroud meridian surface shape, make the outlet limit lm of moving vane and the axial clearance of stator stator blade inlet side, must not be less than the thickness of back thrust washer [11]
(3) stator stator blade axial length B
DWith impeller moving vane axial length B
RRatio B
D/ B
R=0.8-1.2,
(4) stator stator blade cornerite Δ φ=40 °-60 °,
(5) moving vane of impeller is counted Z
R=5-7, the stator blade of stator is counted Z
D=5-7.
2, oil-immersed pump as claimed in claim 1, it is characterized in that impeller moving vane axial length is the 22-28 millimeter, the axial length of stator stator blade is the 24-27 millimeter, and impeller outer diameter is the 74-80 millimeter, and the impeller moving vane prolongs to Way out, be parallel to pump shaft line direction at front shroud from exit point K edge, prolong 3 millimeters backward, extend 6 millimeters at back shroud naturally from exit point n, impeller moving vane number is 5-6, stator stator blade number is 7, and stator stator blade cornerite is 40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108707 CN86108707A (en) | 1986-12-29 | 1986-12-29 | Oil-immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108707 CN86108707A (en) | 1986-12-29 | 1986-12-29 | Oil-immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86108707A true CN86108707A (en) | 1988-08-31 |
Family
ID=4804021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86108707 Withdrawn CN86108707A (en) | 1986-12-29 | 1986-12-29 | Oil-immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86108707A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989943A (en) * | 2019-04-18 | 2019-07-09 | 江苏大学 | A kind of multistage pump return guide vane splitterr vanes and design method |
| CN110177948A (en) * | 2016-10-17 | 2019-08-27 | 赛莱默欧洲有限公司 | For providing the method for axial gap, and the grinding pump of the shim liner including being arranged for providing the axial gap in the cutter assembly of grinding pump |
| CN110701098A (en) * | 2019-10-10 | 2020-01-17 | 中国海洋石油集团有限公司 | Wide-width efficient blade guide wheel suitable for 387-series submersible electric pump |
-
1986
- 1986-12-29 CN CN 86108707 patent/CN86108707A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110177948A (en) * | 2016-10-17 | 2019-08-27 | 赛莱默欧洲有限公司 | For providing the method for axial gap, and the grinding pump of the shim liner including being arranged for providing the axial gap in the cutter assembly of grinding pump |
| CN109989943A (en) * | 2019-04-18 | 2019-07-09 | 江苏大学 | A kind of multistage pump return guide vane splitterr vanes and design method |
| CN110701098A (en) * | 2019-10-10 | 2020-01-17 | 中国海洋石油集团有限公司 | Wide-width efficient blade guide wheel suitable for 387-series submersible electric pump |
| CN110701098B (en) * | 2019-10-10 | 2020-12-29 | 中国海洋石油集团有限公司 | Wide-width efficient blade guide wheel suitable for 387-series submersible electric pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |