阅读说明：本技术 一种适用于387系列潜油电泵的宽幅高效叶导轮 (Wide-width efficient blade guide wheel suitable for 387-series submersible electric pump ) 是由 杨璐 张光一 杜丹阳 李令喜 黄新春 甄东芳 孙靖云 白健华 蒋召平 李越 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种适用于387系列潜油电泵的宽幅高效叶导轮,包括叶轮和导壳,叶轮包括一体结构设置的叶轮轮毂、叶片、前盖板、后盖板,叶片设置为六片,以叶轮轮毂的中心点为基点,环形均匀排布于叶轮轮毂外壁,前盖板和后盖板分别位于叶片的前端和后端；导壳包括一体结构设置的外壳、导叶轮毂、导叶,导叶轮毂设置于外壳内部,导叶设置为八片,以导叶轮毂的中心点为基点,环形均匀分布于外壳和导叶轮毂之间,导叶轮毂与叶轮轮毂间隙配合,装配后位于前盖板上方。本发明高效区范围宽、效率高,在高效区范围拓宽的前提下,同时保证较常规叶导轮效率高,50Hz下高效区覆盖150-500m3/d,额定点泵效66％。(The invention discloses a wide-width efficient impeller guide wheel suitable for a 387 series electric submersible pump, which comprises an impeller and a guide shell, wherein the impeller comprises an impeller hub, blades, a front cover plate and a rear cover plate which are integrally arranged, the blades are arranged into six pieces, the six pieces are annularly and uniformly distributed on the outer wall of the impeller hub by taking the central point of the impeller hub as a base point, and the front cover plate and the rear cover plate are respectively positioned at the front end and the rear end of each blade; the guide shell comprises a shell, a guide impeller hub and guide vanes, wherein the shell, the guide impeller hub and the guide vanes are arranged in the shell in an integrated structure, the guide vanes are arranged into eight pieces, the central point of the guide impeller hub is used as a base point, the guide impeller hub and the guide impeller hub are uniformly distributed between the shell and the guide impeller hub in an annular mode, and the guide impeller hub are in clearance fit and are located above the front cover plate after being assembled. The invention has wide range of high-efficiency area and high efficiency, and simultaneously ensures that the efficiency is higher than that of the conventional guide wheel of the blade on the premise of widening the range of the high-efficiency area, the high-efficiency area covers 150-3 m/d at 50Hz, and the rated point pump efficiency is 66%.)

1. The wide-width efficient impeller guide wheel suitable for the 387 series electric submersible pump comprises an impeller (1) and a guide shell (6), and is characterized in that the impeller (1) comprises an impeller hub (2), blades (3), a front cover plate (4) and a rear cover plate (5) which are integrally arranged, the blades (3) are arranged into six pieces, the central point of the impeller hub (2) is used as a base point, the six pieces are annularly and uniformly distributed on the outer wall of the impeller hub (2), and the front cover plate (4) and the rear cover plate (5) are respectively positioned at the front end and the rear end of the blades (3);

the projection shape of the front cover plate (4) on the axial section of the impeller hub (2) is a first arc line (10), the front end of the first arc line (10) is a first transition arc, the radius R1 of the first arc line is 3.81mm, the rear end of the first arc line (10) is a straight line tangent to the rear end point of the first transition arc line, the included angle between the rear end point and the vertical direction is a front cover plate inclination angle alpha 1, and the front cover plate inclination angle alpha 1 is 67 degrees; the projection shape of the rear cover plate (5) on the axial section of the impeller hub (2) is arc line two (11), the front end of the arc line two (11) is transition arc two, the radius R2 of the arc line two (11) is 12.6mm, the rear end of the arc line two (11) is a straight line tangent to the rear end point of the transition arc, the included angle between the rear end point and the vertical direction is a rear cover plate inclination angle alpha 2, and the rear cover plate inclination angle alpha 2 is 72 degrees;

the guide shell (6) comprises a shell (7), guide vane wheel hubs (8) and guide vanes (9) which are integrally arranged, the guide vane wheel hubs (8) are arranged in the shell (7), the guide vanes (9) are eight, the center points of the guide vane wheel hubs (8) are used as base points and are uniformly distributed between the shell (7) and the guide vane wheel hubs (8) in an annular mode, the guide vane wheel hubs (8) are in clearance fit with the impeller wheel hubs (2), and the guide vane wheel hubs are located at the front ends of the front cover plates (4) after being assembled;

the guide vane (9) is arc-shaped in projection on the axial section of the guide vane hub (8), the arc comprises an upper arc three (12) and a lower arc four (13), the front end of the upper arc three (12) is a transition arc three, the radius R3 of the upper arc three (12) is 15.7mm, the middle end of the upper arc three (12) is a straight line tangent to the front end point of the transition arc three, the included angle beta 1 between the middle end of the upper arc three (12) and the horizontal direction is 18 degrees, the rear end of the upper arc three (12) is a transition arc four, and the radius R4 of the upper arc three (12) is 2; the front end of the four (13) lower arc is a transition arc five, the radius R5 of the four lower arc is 7.5mm, the middle end of the four (13) lower arc is a straight line tangent to the front end point of the transition arc five, the included angle between the middle end of the four (13) lower arc and the horizontal direction is beta 2 and is 16 degrees, the rear end of the four (13) lower arc is a transition arc six, and the radius R6 of the four lower arc is 6 mm.

2. The wide-width efficient vane guide wheel suitable for 387 series electric submersible pumps according to claim 1, characterized in that the impeller hub (2) is suitable for 7/8 "shaft.

3. The wide-width efficient vane guide wheel suitable for 387 series electric submersible pumps according to claim 1, wherein the straight distance between the rear end point of the first arc (10) and the rear end point of the second arc (11) is the impeller outlet width a1, and the impeller outlet width a1 is 10.5 mm; the diameter of the impeller outlet is based on the center line of the impeller hub (2), the straight line distance from the center point of the impeller outlet to the symmetrical center point is the impeller outlet diameter phi 1, and the diameter of the impeller outlet is 72.4 mm; the diameter of an external spigot of the front cover plate (4), namely the diameter phi 2 of an inlet is 49 mm.

4. The wide-width efficient blade guide wheel suitable for the 387 series electric submersible pumps according to claim 1, wherein the projection shape of the blade (3) on the radial cross section is arc, the included angle between the tangent of the inner end of the blade (3) and the radial ray of the impeller hub (2) at the position is a blade inlet placing angle α 3, the blade inlet placing angle α 3 is 40-45 degrees, the included angle between the tangent of the outer end of the blade (3) and the radial ray of the impeller hub (2) at the position is a blade outlet placing angle α 4, the blade outlet placing angle α 4 is 50-55 degrees, the included angle between the two radial rays at the center point of the impeller hub (2) is a blade wrap angle γ 1, and the blade wrap angle γ 1 is 60.5 degrees.

5. The wide-width efficient vane guide wheel suitable for 387 series electric submersible pumps is characterized in that the thickness of the vane (3) is uniformly changed from 1.5mm at the inlet end to 1.8mm at the outlet end according to the claim 1.

6. The wide-width efficient vane guide wheel suitable for the 387 series electric submersible pumps according to claim 1, wherein the projection shape of the guide vane (9) on the radial cross section is arc, the included angle between the tangent of the outer end of the guide vane (9) and the radial ray of the position of the guide vane wheel hub (8) is a guide vane inlet installation angle β 3, the guide vane inlet installation angle β 3 is 45 °, the included angle between the tangent of the inner end of the guide vane (9) and the radial ray of the position of the guide vane wheel hub (8) is a guide vane outlet installation angle β 4, the guide vane outlet installation angle β 4 is 0 °, the included angle between the two radial rays at the center point of the guide vane wheel hub (8) is a guide vane wrap angle γ 2, and the guide vane wrap angle γ 2 is 35 °.

7. The wide-width efficient vane guide wheel suitable for 387 series electric submersible pumps is characterized in that the thickness of the guide vane (9) is gradually increased from 1.5mm at the inlet end to three fifths to reach the maximum value of 2.35mm, and then gradually decreased from three fifths to 1.5mm at the outlet end.

Technical Field

The invention relates to a blade guide wheel, in particular to a wide-width efficient blade guide wheel suitable for 387-series electric submersible pumps.

Background

85% of mechanical production wells in offshore oil fields in China are lifted by means of electric submersible pumps, and the yield contribution of the mechanical production wells reaches over 90%. Because the operation high-efficiency area recommended by the conventional electric pump unit is narrow (the discharge capacity range is limited), and the oil field oil deposit geology is uncertain, the directional well is adopted, the production increasing measures are taken, the actual productivity of the oil well is inaccurate in prenatal prediction, the electric pump cannot work in the high-efficiency area, the electric pump deviates from the operation of the high-efficiency area for a long time, the impeller and the thrust washer are seriously eccentric, and the efficiency and the service life of the electric pump are greatly reduced.

The investigation shows that at present, no product or technology can solve the problem at home and abroad. There is no mention of searching domestic literature and patents.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a wide-width efficient vane guide wheel suitable for a 387 series electric submersible pump, has wide efficient area range and high efficiency, and ensures that the efficiency is higher than that of a conventional vane guide wheel on the premise of widening the efficient area range, the efficient area covers 150-3/d at 50Hz, and the rated pumping efficiency is 66%.

The purpose of the invention is realized by the following technical scheme.

The invention is suitable for the high-efficient impeller guide pulley of broad width of 387 serial submersible electric pump, including impeller and guide shell, the said impeller includes impeller wheel hub, blade, front shroud, back shroud that the integral structure sets up, the said blade sets up as six, regard central point of impeller wheel hub as the basic point, the annular is evenly arranged on the outer wall of impeller wheel hub, said front shroud and back shroud are located front end and rear end of the blade respectively;

the projection shape of the front cover plate on the axial section of the impeller hub is a first arc line, the front end of the first arc line is a first transition arc, the radius R1 of the first arc line is 3.81mm, the rear end of the first arc line is a straight line tangent to the rear end point of the first transition arc line, the included angle between the rear end point and the vertical direction is a front cover plate inclination angle alpha 1, and the front cover plate inclination angle alpha 1 is 67 degrees; the projection shape of the rear cover plate on the axial section of the impeller hub is a second arc line, the front end of the second arc line is a second transition arc, the radius R2 of the second arc line is 12.6mm, the rear end of the second arc line is a straight line tangent to the rear end point of the transition arc, the included angle between the rear cover plate and the vertical direction is a rear cover plate inclination angle alpha 2, and the rear cover plate inclination angle alpha 2 is 72 degrees;

the guide shell comprises a shell, an impeller guide hub and eight guide vanes, the shell, the impeller guide hub and the guide vanes are integrally arranged, the impeller guide hub is arranged in the shell, the eight guide vanes are annularly and uniformly distributed between the shell and the impeller guide hub by taking a central point of the impeller guide hub as a base point, the impeller guide hub is in clearance fit with the impeller guide hub and is positioned at the front end of the front cover plate after being assembled;

the projection shape of the guide vane on the axial section of the guide vane wheel hub is arc, the arc comprises an upper arc three and a lower arc four, the front end of the upper arc three is a transition arc three, the radius R3 of the upper arc three is 15.7mm, the middle end of the upper arc three is a straight line tangent to the front end point of the transition arc three, the included angle beta 1 between the straight line and the horizontal direction is 18 degrees, the rear end of the upper arc three is the transition arc four, and the radius R4 of the transition arc four is 2 mm; the front end of the four lower arc lines is a transition arc five, the radius R5 of the four lower arc lines is 7.5mm, the middle end of the four lower arc lines is a straight line tangent to the front end point of the five transition arc arcs, the included angle between the middle end of the four lower arc lines and the horizontal direction is beta 2 and is 16 degrees, the rear end of the four lower arc lines is a transition arc six, and the radius R6 of the four lower arc lines is 6 mm.

The impeller hub is adapted for use with an 7/8 "shaft.

The linear distance between the rear end point of the first arc line and the rear end point of the second arc line is impeller outlet width a1, and the impeller outlet width a1 is 10.5 mm; the diameter of the impeller outlet is based on the center line of the impeller hub, the straight line distance from the center point of the impeller outlet to the symmetrical center point is adopted, and the diameter phi 1 of the impeller outlet is 72.4 mm; the diameter of the front cover plate external spigot, namely the diameter phi 2 of an inlet is 49 mm.

The projection shape of the blade on the radial section is arc-shaped, the included angle between the tangent line of the inner end part of the blade and the radial ray of the position of the impeller hub is a blade inlet laying angle alpha 3, the blade inlet laying angle alpha 3 is 40-45 degrees, the included angle between the tangent line of the outer end part of the blade and the radial ray of the position of the impeller hub is a blade outlet laying angle alpha 4, the blade outlet laying angle alpha 4 is 50-55 degrees, the included angle between the two radial rays at the central point of the impeller hub is a blade wrap angle gamma 1, and the blade wrap angle gamma 1 is 60.5 degrees.

The blade thickness varied uniformly from 1.5mm at the inlet end to 1.8mm at the outlet end.

The guide vane is arc in the shape of projection on the radial section, and the contained angle of the tangent line of the outer end part of the guide vane and the radial ray of the guide vane hub at the position is a guide vane inlet laying angle beta 3, the guide vane inlet laying angle beta 3 is 45 degrees, and the contained angle of the tangent line of the inner end part of the guide vane and the radial ray of the guide vane hub at the position is a guide vane outlet laying angle beta 4, the guide vane outlet laying angle beta 4 is 0 degree, and the contained angle of two radial rays at the central point of the guide vane hub is a guide vane wrap angle gamma 2, and the guide vane wrap angle gamma 2 is 35.

The thickness of the guide vane gradually increases from 1.5mm at the inlet end to three fifths to reach a maximum value of 2.35mm, and then gradually decreases from three fifths to 1.5mm at the outlet end.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

(1) the invention provides a wider high-efficiency working area, and solves the problem that the running life of an electric pump is influenced due to eccentric wear caused by long-term running of the electric pump in a non-high-efficiency area in actual production because the actual productivity of an oil well is not accurately predicted before production.

(2) The invention avoids the problem that the conventional electric pump product cannot meet the non-fault pump replacement operation caused by the extraction liquid yield increasing measure in the production process due to large amplitude change of the liquid yield of the oil reservoir, improves the production time efficiency, saves energy and reduces emission.

(3) The overall pump efficiency change in the high-efficiency working area of the invention is more stable than that of the conventional electric pump, and the pump can provide higher efficiency at different flow rates.

Drawings

FIG. 1 is a schematic view of an impeller structure;

FIG. 2 is a schematic view of a guide shell structure;

FIG. 3 is a schematic projection view of the upper cover plate and the lower cover plate on the axial section of the impeller hub;

FIG. 4 is a schematic view of a blade projected onto a radial section of an impeller hub;

FIG. 5 is a schematic view of a vane projected onto an axial cross section of an impeller hub;

fig. 6 is a schematic view of a guide vane projected on a radial section of the guide vane hub.

Reference numerals: 1, an impeller; 2, an impeller hub; 3, blades; 4, a front cover plate; 5, a rear cover plate; 6, guiding a shell; 7, a shell; 8 a vane hub; 9 guide vanes; 10, an arc line I; 11, arc line two; 12, a third upper arc line; 13 lower arc four.

Detailed Description

In order to make the present invention more easily and clearly understood, the technical solution and the technical effects thereof will be described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the present invention is a wide-width high-efficiency impeller suitable for 387 series electric submersible pumps, including an impeller 1 and a guide shell 6.

Impeller 1 includes impeller wheel hub 7, blade 3, front shroud 4, the back shroud 5 that the body structure set up, blade 3 sets up to six to impeller wheel hub 2's central point is the basic point, and the annular is evenly arranged in impeller wheel hub 2 outer wall, front shroud 4 and back shroud 5 are located the front end and the rear end of blade 3 respectively.

The projection shape of the front cover plate 4 on the axial section of the impeller hub 2 is a first arc line 10, the front end of the first arc line 10 is a first transition arc, the radius R1 is 3.81mm, the rear end of the first arc line 10 is a straight line tangent to the rear end point of the first transition arc, the included angle between the rear end of the first arc line 10 and the vertical direction is a front cover plate inclination angle alpha 1, and the front cover plate inclination angle alpha 1 is 67 degrees; the projection shape of the back cover plate 5 on the axial section of the impeller hub 2 is arc two 11, the front end of the arc two 11 is transition arc two, the radius R2 is 12.6mm, the back end of the arc two 11 is a straight line tangent to the back end point of the transition arc, the included angle with the vertical direction is a back cover plate inclination angle alpha 2, and the back cover plate inclination angle alpha 2 is 72 degrees.

The impeller hub 2 is adapted for use with an 7/8 "shaft.

The linear distance between the rear end point of the first arc line 10 and the rear end point of the second arc line 11 is impeller outlet width a1, and the impeller outlet width a1 is 10.5 mm; the diameter of the impeller outlet is based on the center line of the impeller hub 2, the straight line distance from the center point of the impeller outlet to the symmetrical center point is the impeller outlet diameter phi 1, and the diameter of the impeller outlet is 72.4 mm; the diameter of the external spigot of the front cover plate 4, namely the diameter phi 2 of the inlet is 49 mm.

The projection shape of the blade 3 on the radial cross section is arc, the included angle between the tangent line of the inner end part of the blade 3 and the radial ray of the impeller hub 2 at the position is a blade inlet installation angle alpha 3, the blade inlet installation angle alpha 3 is 40-45 degrees, the included angle between the tangent line of the outer end part of the blade 3 and the radial ray of the impeller hub 2 at the position is a blade outlet installation angle alpha 4, the blade outlet installation angle alpha 4 is 50-55 degrees, the included angle between the two radial rays at the central point of the impeller hub 2 is a blade wrap angle gamma 1, and the blade wrap angle gamma 1 is 60.5 degrees.

The thickness of the blades 3 varies uniformly from 1.5mm at the inlet end to 1.8mm at the outlet end, which is from the inside to the outside as shown in fig. 4.

Leading shell 6 includes shell 7, leading impeller hub 8, the stator 9 that an organic whole structure set up, it sets up inside shell 7 to lead impeller hub 8, stator 9 sets up to eight to lead impeller hub 8's central point to be the basic point, annular evenly distributed is between shell 7 and leading impeller hub 8, lead impeller hub 8 and 2 clearance fit of impeller hub, be located 4 front ends of front shroud after the assembly.

The projection shape of the guide vane 9 on the axial section of the guide vane hub 8 is arc, the arc comprises an upper arc three 12 and a lower arc four 13, the front end of the upper arc three 12 is a transition arc three, the radius R3 of the upper arc three is 15.7mm, the middle end of the upper arc three 12 is a straight line tangent to the front end point of the transition arc three, the included angle beta 1 between the straight line and the horizontal direction is 18 degrees, the rear end of the upper arc three 12 is a transition arc four, and the radius R4 of the transition arc four is 2 mm; the front end of the four lower arc lines 13 is a transition arc five, the radius R5 of the four lower arc lines is 7.5mm, the middle end of the four lower arc lines 13 is a straight line tangent to the front end point of the five transition arc arcs, the included angle between the middle end of the four lower arc lines 13 and the horizontal direction is beta 2 and is 16 degrees, the rear end of the four lower arc lines 13 is a transition arc six, and the radius R6 of the four lower arc lines is 6 mm.

The projection shape of stator 9 on radial cross-section is the arc, and the contained angle of the tangent line of the outer tip of stator 9 and the radial ray of this position of guide wheel hub 8 is stator import laid angle beta 3, stator import laid angle beta 3 is 45, and the tangent line of the tip in stator 9 and the contained angle of the radial ray of this position of guide wheel hub 8 are stator export laid angle beta 4, stator export laid angle beta 4 is 0, and the contained angle of two radial rays in 8 central points of guide wheel hub is guide vane cornerite gamma 2, guide vane cornerite gamma 2 is 35.

The thickness of the guide vanes 9 is gradually increased from 1.5mm at the inlet end to three fifths to reach the maximum value of 2.35mm, and then gradually decreased from three fifths to 1.5mm at the outlet end. Wherein the inlet end to the outlet end is from outside to inside as shown in fig. 6.

The high-efficiency working area of the guide wheel of the invention covers 150-500m at 50Hz³And/d, rated spot pump efficiency 66%.

The invention has the characteristics of wide width and high efficiency, namely, the range of the high-efficiency working area is wide, the overall efficiency is high, the problem that the impeller and the thrust washer are seriously eccentric and worn due to the fact that the conventional electric pump cannot adapt to the large change of the actual liquid production of the oil field because the high-efficiency working area is narrow and works in a non-high-efficiency area is solved, the overall efficiency of the electric pump is improved, and the service life of the electric pump is prolonged. The invention has novel structure and good application effect.

The technical solutions of the present invention are schematically described above with reference to the drawings and the embodiments, but are not limited to the specific embodiments described above. It will be appreciated by those skilled in the art that in practice, the invention may be modified in some ways, and similar arrangements may be devised in light of the above teachings. In particular, it is pointed out that all obvious modifications are included within the scope of protection of the invention, without departing from the design spirit thereof.