CN201330759Y - Rotary power type multiphase booster pump - Google Patents

Abstract

The utility model relates to a rotary power type multiphase booster pump, which comprises a pump body connected with a power device. A sectional pump casing is arranged outside the pump body, and the pump body comprises a plurality of units for homogenization, inhalation, pressurization and diffusion. The homogenization unit is provided with a buffer tank, and a porous separation pipe is inserted into the centre of the buffer tank; and the upper end of the separation pipe penetrates out of the buffer tank while the lower end thereof is fixed into an inhalation unit. The inhalation unit comprises a stream guide cone, on which homogenization blades are arranged. The pressurization unit comprises a cascaded structure combined by an impeller which is higher than the first level and an interstage regulator, the impeller is fixed on a pump shaft via a tapered hub outside which blades are arranged, and the impeller rotates along with the pump shaft; the interstage regulator comprises a hub sleeved on the pump shaft with clearance, a guide vane is arranged on the hub, a sleeve is fixed outside the guide vane and on the pump casing, and the interstage regulator does not rotate along with the pump shaft. Besides, the diffusion unit comprises a diffusion section and a pressing-out chamber. The utility model enables the pressurization to multiphase flow of oil gas and water to be feasible without being separated, thereby realizing the economical exploitation of marginal oil fields, nearby fields and deep-water fields.

Description

A kind of rotating dynamical type multiphase booster pump

Technical field

The utility model relates to a kind of multiphase pump, particularly about a kind of rotating dynamical type multiphase booster pump.

Background technique

The end of the eighties, along with petroleum industry from land abominable relatively ocean of physical environment and the desert of turning to, oil-gas field development also turns to the exploitation of small-sized marginal field and satellite from the larger hydrocarbon field of concentrating relatively, with the multiphase booster pump is the mixed transferring technology of the heterogeneous well stream of the undressed oil gas water of remote conveying of core, obtains the extensive concern of each major oil companies with its significant technical advantage and considerable economic.But owing to the complexity of multiphase flow and the narrow limitation that we are familiar with multiphase flow, in the remote course of conveying of the heterogeneous well stream of oil gas water, traditional gas, liquid separate, by pump and compressor respectively the supercharging mode of carrying still occupy main status, in some short-range mixed transporting tube lines, gas-liquid is mixed the mode of carrying respectively after the supercharging again and is also occupied sizable ratio.The reason of searching to the bottom, the heterogeneous supercharging technology of oil gas water that is to be suitable for The field is that the development of multiphase pump itself has sizable difficulty, and the key of this technical research is to seek a kind of multiphase pump that can realize the heterogeneous supercharging of gas-liquid of taking into account pump and compressor performance.

The multiphase pump of domestic development is the positive displacement multiphase pump basically, with the double-screw type multiphase pump is example, its typical feature is middle small flow, middle high pressure-charging, and the twin-screw multiphase pump experimental prototype that China develops at present mostly is middle low pressure charging, to the solid particle sensitivity, under equal design condition, compare its size and weight with leaf structure all bigger; For traditional vane pump, because action of centrifugal force during high speed rotating, make that have fluid of different nature is easy to take place phase with gas and separates, thereby cause the efficient of pump under the gas-liquid two-phase flow condition sharply to reduce even can not work, conventional centrifugal pump is when the inlet gas volume content reaches 4%, its efficient just reduces rapidly, can't turn round basically when the inlet gas volume content surpasses 10%; Axial-flow pump surpasses after 20% at inlet gas content substantially, and efficient sharply reduces up to losing boosting capability.

Obtaining some preliminary achievements in research aspect the development of multiphase booster pump abroad, nearly 10 kinds of dissimilar multiphase pumps have been manufactured experimently, wherein the double-screw type multiphase mixing transmission pump produced such as the achievement in research screw axis streaming multiphase pump planned of the most representative sea God of being and German Bornemann pump industry company.The present existing part industrialization product of these two kinds of pumps, and be applied in land, offshore oilfield all over the world and the deep water oil field development.But up to the present, the performance of multiphase booster pump also can not satisfy the actual demand at scene, oil field far away, and on the one hand, because heterogeneous mobile complexity, and pump is to the dependence of fluidised form and gas content, and the using scope of multiphase pump also is subjected to certain limitation at present; Performance and the efficient of multiphase pump under high inlet gas liquor ratio operating mode all has much room for improvement on the other hand, when the inlet gas volume content reaches 50%, the optimum efficiency of spiral axial-flow pump only has an appointment 45%, and the double-screw type multiphase pump is relatively more responsive to solid particle on the one hand, volume is bigger simultaneously, surpass after 70% at the inlet gas volume content, its efficient also reduces rapidly, simultaneously multiphase pump also face anti-do change, sealing, a series of technical problem such as lubricated.With regard to the actual conditions of China, on the one hand, owing to abroad existing key technology product is holded in close confidence, on the other hand because China's oil product has high sticking, Gao Ning, contains sand, oil-gas ratio changes characteristics such as feature greatly, the external multiphase pump of introducing has also run into series of technical in the on-the-spot use in oil field, as the adaptability of multiphase pump convection, dried commentaries on classics, vibration, seal leakage, impurity axis etc., so the multiphase pump of the suitable China of exploitation oil field characteristic is imperative.

Summary of the invention

At the problems referred to above, the purpose of this utility model provides a kind of rotating dynamical type multiphase booster pump with heterogeneous conveying capacity.

For achieving the above object, the utility model is taked following technological scheme: a kind of rotating dynamical type multiphase booster pump, it comprises power plant, described power plant output terminal connects a pump housing by pump shaft, described pump housing outer periphery is equipped with pump case, and the described pump housing comprises suction unit and homogenizing unit, the compress cell of forming pressure structure of forming suction structure, the diffusion unit of forming the diffusion structure; Described homogenizing unit comprises a knock out drum, described knock out drum is fixed on the described pump case, described knock out drum upper and lower end all leaves opening, central authorities at described knock out drum are provided with a hollow porous separator tube, the upper shed that described hollow porous separator tube upper end passes described knock out drum links to each other with the input device of multiphase flow, described hollow porous separator tube lower end is fixed on the described suction unit, and the porous on the described hollow porous separator tube is the some through holes that are opened on the tube wall; Described suction unit is arranged on the end of described homogenizing unit, comprise that one is fixedly connected on the flow deflecting cone on the described pump shaft, leave the space between described flow deflecting cone and the described knock out drum under shed, the outer rim of described flow deflecting cone is provided with a plurality of helical blade type homogenization blade; Described compress cell is arranged on the end of described suction unit, the cascaded structure that comprises the combination of above impeller of one-level and inter-stage regulator, described impeller is fixedly attached on the described pump shaft by a cone hub, the outer rim of described cone hub is provided with a plurality of screw type blades, leave the gap between described blade and the described pump case, described inter-stage regulator is set on the described pump shaft with a gap by a circular hub, described circular hub outer rim is provided with a plurality of stators, described stator outer rim is fixed a sheathed sleeve, and described sleeve is fixed on the described pump case inwall; Described diffusion unit is arranged on the end of described compress cell, comprises a diffusion passage that is connected with described compress cell, and the described diffusion passage the other end connects a slick and sly type cavity delivery chamber.

Described power plant are a high speed frequency conversion anti-explosion motor, and described motor periphery is provided with cooling coil, and described cooling coil outer periphery is equipped with the electric motor protecting shell.

The described pump case of described impeller and inter-stage fluidised form regulator periphery is set to segmented.

The Hand of spiral of homogenization blade is consistent with the rotation direction of impeller blade in the described compress cell in the described suction unit.

Stator is from the root to the end shape of attenuation gradually on described impeller upper blade and the inter-stage fluidised form regulator.

The small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the minimum angle of the axis of described small through hole and the axis of separator tube is less than or equal to 90 °, and the axis elongation line of upper and lower adjacent two described small through hole intersects.

The utility model is owing to take above technological scheme, it has the following advantages: 1, the related rotating dynamical type multiphase booster pump of the utility model is made up of auxiliary units such as sucking unit, compress cell, three major components of diffuser and stuffing box bearing, drive system, the heterogeneous fluid-mixing that contains oil, gas, water, solid particle, do not separating, need not under the situation of supercharging respectively, can realize oil, gas, water, solid multiphase flow supercharging and MIXED PHASE TRANSPORTATION IN by the utility model, take into account the performance of traditional blades pump and compressor.2, the utility model is equipped with the high frequency anti-explosion motor and drives, and auxilliary operation monitoring system is arranged, and guarantees that multiphase pump has good off design performance.3, the utility model is provided with the homogenizing unit and sucks the unit, and the multiphase flow that will contain big air mass is in advance sheared and all mixed, and makes gas-liquid two-phase be metastable even bubble flow, for further supercharging is ready.4, the utility model compress cell adopts impeller and inter-stage fluidised form regulator plural serial stage structure, and design parameters at different levels can change to some extent according to operating mode; The impeller of high speed rotating provides kinetic energy for heterogeneous fluid, inter-stage fluidised form regulator is converted into pressure with kinetic energy and can and shreds big air mass by the stator on the guide wheel, leave certain interval between impeller and the pump case, the mixed medium that contains sand is passed through, really reach axial supercharging, open type conveying.5, the utility model is taked the radially split pump shell structure because of the multipolarity of compress cell, makes dismounting easy to maintenance.6, the utility model diffusion unit has huge delivery chamber, can be further will realize the pressure transformation of energy, and gives security for energy interchange and equilibrium between the gas-liquid two-phase.7, the utility model totally adopts vertical structure, thereby guarantees minimum sea and installation dimension under water.

In sum, the utility model makes oil gas water multiphase supercharging under unseparated situation become possibility, in saving equipment and respective lines construction cost, greatly simplify oil-gas gathering and transportation technological process, reduce in the operating cost, can be by reducing wellhead back pressure, improve the recovery rate in oil field, realize the economic exploitation in marginal oil field, nearby field and deep water oil field.Compare with positive displacement multiphase pump model machine, mentality of designing of the present utility model is high speed frequency conversion, low weight, small volume, big flow, has certain sand prevention function, and considers platform and following application prospect under water, adopt vertical structure, be convenient to the further operation of skid design and installation under water.Compare with general vane pump, the utility model is at the deficiencies in the prior art, use for reference the design method of single-phase pump and compressor, consider the particularity of heterogeneous fluid simultaneously, gas compressibility particularly, the optimal design of the general structure by vane pump, particularly take into account the optimal design of the vane foil of single-phase pump and compressor performance, adopt heterogeneous compress cell segmented design, make that the phase separation degree weakens greatly between the interior gas-liquid of pump, thereby improve the service behaviour of vane pump under the multiphase flow condition to a great extent, also make pump housing easy accessibility simultaneously.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is the utility model compress cell structural representation

Fig. 3 be in the compress cell impeller shaft to generalized section

Fig. 4 is an inter-stage fluidised form regulator radial cross section schematic representation in the compress cell

Fig. 5 sucks flow deflecting cone structural representation in the unit for the utility model

Fig. 6 is a homogenizing wheel schematic representation on the flow deflecting cone

Embodiment

Below in conjunction with drawings and Examples the technical solution of the utility model is described in detail.

As shown in Figure 1, the utility model is the shaft type linkage structure, comprises power plant 1, the pump housing 2 by power plant 1 driving connection, and other auxiliary device, such as: bearing, auxiliary fixing member, link, sealing system, lubrication system etc.

Power plant 1 of the present utility model adopt high speed frequency conversion anti-explosion motor 11 to drive, and for effectively absorbing the heat that motor 11 produces because of running, are provided with cooling coil 12 in the periphery of motor 11.Motor 11 is electrically connected with measuring and control device such as the pressure that is arranged on the pump housing 2 import and exports, temperature, flows, and the operator can make motor 11 to change according to incoming flow and carry out rotational speed regulation by the operation panel control motor 11 that is connected with measuring and control device.The output terminal of motor 11 connects a pump shaft 13 with one heart, on pump shaft 13, is connected with the pump housing 2.The outer periphery of the pump housing 2 is equipped with pump case 3.The periphery of power plant 1 also can be provided with motor casing 4, and pump case 3 and motor casing 4 both can integral productions, also can split production, couple together by link behind the split production.

The pump housing 2 of the present utility model comprises suction, supercharging, diffusion three-stage structure, because the utility model is to adopt the suction type structure, what therefore be arranged in order from power plant 1 one ends is diffusion unit 21, the compress cell 22 of forming pressure structure of forming the diffusion structure, suction unit 23 and the homogenizing unit 24 of forming suction structure.

Diffusion unit 21 is made up of a diffusion passage 211 and a delivery chamber 212, and diffusion passage 211 is one by the turning type structure that axially transfers to radially, and an axial end connects the outlet of compress cell 22, and radially an end connects delivery chamber 212.Delivery chamber 212 is a slick and sly type radial chamber structure, outwards vertically passes pump case 3, is connected with an external feedway.The kinetic energy of the heterogeneous fluid that diffusion unit 21 can flow out from compress cell 22 further changes the pressure energy into, and utilize slick and sly die cavity body to make the further homogenizing of energy between gas-liquid two-phase with relative speed difference, reduce speed sliding difference, at last with outside the heterogeneous fluid extrusion cavity.

As shown in Figure 1 and Figure 2, compress cell 22 is arranged on the upper end of diffusion unit 21, be the cascaded structure more than the one-level, each level of compress cell 21 all is made up of an impeller 221 and an inter-stage regulator 222, during plural serial stage, at different levels joining end to end, impeller 221 and inter-stage regulator 222 are rendered as the state of space.The design parameter of impellers 221 at different levels and inter-stage regulator 222 can change to some extent according to operating mode, and simultaneously, pump case 3 can be set to segmentation structure during plural serial stage, is fastenedly connected from beginning to end by stay bolt then, realizes the classification dismounting.

As shown in Figure 3, impeller 221 comprises a cone hub 223, and angle of taper is 6～12 °, and the awl point is over against coming flow path direction during installation.Offer keyway 224 on the wheel hub center hole, fixedly connected with pump shaft 13 by key, certainly, wheel hub 223 also can take other Placement and pump shaft 13 to fix.For saving material and loss of weight, wheel hub 223 is provided with toroidal cavity 225, and toroidal cavity communicates with the external world by through hole 226, to keep the inside and outside weighing apparatus that flattens.The outer rim of wheel hub 223 is provided with an above screw type blade 227, be generally 3～6, blade 227 is attenuation gradually from the root to the end, blade profile is taken into account the characteristics of pump and compressor blade profile in the prior art, the pressure increasing velocity that guarantees streamwise and perpendicular flow direction is milder, to prevent or to slow down the generation of phase separation between gas-liquid two-phase.Leave the gap between blade 227 and the pump case 3, be about 0.2～0.3mm, promptly so-called open architecture can make that multiphase flow passes through smoothly.

As shown in Figure 4, inter-stage regulator 222 comprises a circular hub 228, wheel hub 228 is set on the pump shaft 13 with a gap, even compartment of terrain is provided with a plurality of stators 229 on wheel hub 228 outer rims, stator 229 be from the wheel hub root to the end cone structure of attenuation gradually, adopt conventional streamline method design to be shaped, be used to dredge the flow direction of fluid and shear air mass or liquid plug.A peripheral fixedly connected sleeve 230 of stator 229, sleeve 230 fixed cover again is located on the inwall of pump case 3.When pump shaft 13 rotated, inter-stage regulator 222 did not rotate with pump shaft 13.

Heterogeneous fluid obtains kinetic energy under impeller 221 effects of high speed rotating, the gap axial motion along blade 227 enters into inter-stage regulator 222.Inter-stage regulator 222 is eliminated impellers 221 outlet fluid circular rectors, and the kinetic energy of fluid is converted to the pressure energy, forces multiphase flow to continue motion vertically, enters into next stage impeller 221; Under the shear action of stator 229,, adjust fluid flow state to a certain extent simultaneously, make the interior gas-liquid two-phase flow of pump even, for the proper functioning of the heterogeneous compress cell of the next one is given security with air mass or the fragmentation of liquid plug that impeller 221 goes out interruption-forming.

As Fig. 5, shown in Figure 6, the suction unit 23 of suction structure is arranged on the upper end of compress cell 22, comprises a flow deflecting cone 231, and flow deflecting cone 231 is fixedly connected on the pump shaft 13, rotates with pump shaft 13.Evenly be provided with a plurality of homogenization blade 232 on the outer rim of flow deflecting cone 231, leave the gap between homogenization blade 232 and the pump case 3, form the fluid passage.Form a guiding gutter 233 between per two homogenization blade 232, the fluting direction of guiding gutter 233 also is the rotation direction of homogenization blade 232.Consistent with blade 227 Hand of spiral on the impeller 221 in the compress cell 22, to guarantee the flow direction unanimity of multiphase flow, prevent turbulent flow sand grains is deposited before flow deflecting cone 231.The vertex of a cone of flow deflecting cone 231 is provided with tapped hole 234, is used for being connected with homogenizing unit 24.

As shown in Figure 1, the homogenizing unit 24 of suction structure comprises a knock out drum 241, and knock out drum 241 is fixed on the pump case 3.Knock out drum 241 upper and lower ends all leave opening, and under shed is over against flow deflecting cone 231, and and flow deflecting cone 231 between leave the gap.The central authorities of knock out drum 241 vertically are provided with a separator tube 242, and separator tube 242 lower ends are connected in the tapped hole 234 on flow deflecting cone 231 vertex of a cones, can rotate with flow deflecting cone 231.Separator tube 242 upper ends pass the upper shed of knock out drum 241, as the inlet of pump, are connected with the multiphase flow input pipeline.Separator tube 242 is a hollow tube, tube wall is provided with the small through hole 243 of a plurality of different-diameters, and, be greater than the small through hole aperture of its underpart in the small through hole aperture on separator tube 242 tops, but each aperture all is less than or equal to 1/4 of separator tube 242 diameters, and the perforate gross area of all small through hole is more than or equal to the maximum flow area of separator tube.The axis of small through hole 243 is preferably vertical with the axis of separator tube 242; Certainly, angled also passable, but this moment upper and lower adjacent two small through hole 243 axial direction can not be identical.Small through hole on same cross-sectional circumferential on the separator tube 242, spacing each other are 1/3 of separator tube diameter.

The utility model is when work, pump housing inlet is connected in the outlet of external multiphase flow input pipeline, start power plant 1, make it drive pump shaft 13 rotations, multiphase flow rate is introduced in the separator tube 242 of homogenizing unit 24, under the gravitational settling effect, gas-liquid at first produces separation, and under the turning effort of separator tube 242, big air mass is broken, the gas-liquid binary states fully mixes once again, progressively reaches balance.Metastable multiphase flow flows out from the small through hole 243 of separator tube 242, cushions at knock out drum 241, and the under shed from knock out drum 241 enters into suction unit 23 under gravity and suction again.Lead down at all combs of mixed guiding gutter 233, shear big air mass or liquid plug, make multiphase flow form a satisfactory velocity field in compress cell 22 ingress through homogenizing wheel 232.Multiphase flow obtains kinetic energy at 221 in the impeller of the compress cell of high speed rotating, is converted to the pressure energy again in 222 in inter-stage regulator, and the big air mass that the previous stage impeller is discharged is smashed, and forms uniform mixed flow.Multiphase flow is through the supercharging step by step of compress cell 22, arrive diffusion unit 21, under the diffusion passage 211 and delivery chamber 212 effects of diffusion unit 21, make kinetic energy further be converted into the pressure energy, and make that energy further exchanges between the gas-liquid two-phase with relative speed difference, reduce speed difference, finally flow into together in the external feedway.

Claims (15)

1, a kind of rotating dynamical type multiphase booster pump, it is characterized in that: it comprises power plant, described power plant output terminal connects a pump housing by pump shaft, described pump housing outer periphery is equipped with pump case, and the described pump housing comprises suction unit and homogenizing unit, the compress cell of forming pressure structure of forming suction structure, the diffusion unit of forming the diffusion structure;

Described homogenizing unit comprises a knock out drum, described knock out drum is fixed on the described pump case, described knock out drum upper and lower end all leaves opening, central authorities at described knock out drum are provided with a hollow porous separator tube, the upper shed that described hollow porous separator tube upper end passes described knock out drum links to each other with the input device of multiphase flow, described hollow porous separator tube lower end is fixed on the described suction unit, and the porous on the described hollow porous separator tube is the some through holes that are opened on the tube wall;

Described suction unit is arranged on the end of described homogenizing unit, comprise that one is fixedly connected on the flow deflecting cone on the described pump shaft, leave the space between described flow deflecting cone and the described knock out drum under shed, the outer rim of described flow deflecting cone is provided with a plurality of helical blade type homogenization blade;

Described compress cell is arranged on the end of described suction unit, the cascaded structure that comprises the combination of above impeller of one-level and inter-stage regulator, described impeller is fixedly attached on the described pump shaft by a cone hub, the outer rim of described cone hub is provided with a plurality of screw type blades, leave the gap between described blade and the described pump case, described inter-stage regulator is set on the described pump shaft with a gap by a circular hub, described circular hub outer rim is provided with a plurality of stators, described stator outer rim is fixed a sheathed sleeve, and described sleeve is fixed on the described pump case inwall;

Described diffusion unit is arranged on the end of described compress cell, comprises a diffusion passage that is connected with described compress cell, and the described diffusion passage the other end connects a slick and sly type cavity delivery chamber.

2, a kind of rotating dynamical type multiphase booster pump as claimed in claim 1 is characterized in that: described power plant are a high speed frequency conversion anti-explosion motor, and described motor periphery is provided with cooling coil, and described cooling coil outer periphery is equipped with the electric motor protecting shell.

3, a kind of rotating dynamical type multiphase booster pump as claimed in claim 1 is characterized in that: the described pump case of described impeller and inter-stage fluidised form regulator periphery is set to segmented.

4, a kind of rotating dynamical type multiphase booster pump as claimed in claim 2 is characterized in that: the described pump case of described impeller and inter-stage fluidised form regulator periphery is set to segmented.

5, as claim 1 or 2 or 3 or 4 described a kind of rotating dynamical type multiphase booster pumps, it is characterized in that: the Hand of spiral of homogenization blade is consistent with the rotation direction of impeller blade in the described compress cell in the described suction unit.

6, as claim 1 or 2 or 3 or 4 described a kind of rotating dynamical type multiphase booster pumps, it is characterized in that: stator is from the root to the end shape of attenuation gradually on described impeller upper blade and the inter-stage fluidised form regulator.

7, a kind of rotating dynamical type multiphase booster pump as claimed in claim 5 is characterized in that: stator is from the root to the end shape of attenuation gradually on described impeller upper blade and the inter-stage fluidised form regulator.

8, as claim 1 or 2 or 3 or 4 described a kind of rotating dynamical type multiphase booster pumps, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the axis of described small through hole and the axis normal of separator tube.

9, a kind of rotating dynamical type multiphase booster pump as claimed in claim 5, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the axis of described small through hole and the axis normal of separator tube.

10, a kind of rotating dynamical type multiphase booster pump as claimed in claim 6, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the axis of described small through hole and the axis normal of separator tube.

11, a kind of rotating dynamical type multiphase booster pump as claimed in claim 7, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the axis of described small through hole and the axis normal of separator tube.

12, as claim 1 or 2 or 3 or 4 described a kind of rotating dynamical type multiphase booster pumps, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the minimum angle of the axis of described small through hole and the axis of separator tube is less than 90 °, and the axis elongation line of upper and lower adjacent two described small through hole intersects.

13, a kind of rotating dynamical type multiphase booster pump as claimed in claim 5, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the minimum angle of the axis of described small through hole and the axis of separator tube is less than 90 °, and the axis elongation line of upper and lower adjacent two described small through hole intersects.

14, a kind of rotating dynamical type multiphase booster pump as claimed in claim 6, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the minimum angle of the axis of described small through hole and the axis of separator tube is less than 90 °, and the axis elongation line of upper and lower adjacent two described small through hole intersects.

15, a kind of rotating dynamical type multiphase booster pump as claimed in claim 7, it is characterized in that: the small through hole aperture on described separator tube top is greater than the small through hole aperture of its underpart, each aperture all is not more than 1/4 of separator tube diameter, the minimum angle of the axis of described small through hole and the axis of separator tube is less than 90 °, and the axis elongation line of upper and lower adjacent two described small through hole intersects.

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