CN1285835C - Blade type oil, gas and water multiphase booster pump - Google Patents

Abstract

The present invention relates to a blade type multiphase booster pump for oil, gas and water, which at least comprises a booster device, a bearing and sealing device and a power device. The rotating shafts of the booster device and the power device are concentrically arranged and are fixed to the respective rotating shaft through the bearing and sealing device. Each of the rotating shafts is connected with the power device through a shaft coupler; the power device drives the booster device to work; a multiphase fluid is boosted in the booster device and then is output. A multiphase booster unit is arranged in the booster device. The present invention compromises the performance of a blade pump and a compressor; therefore, the optimized blade type multiphase pump can avoid or delay the generation of gas-liquid biphase phase state separation in a blade wheel flow channel and improve the performance of the blade pump during delivering the multiphase fluid. Due to an opened structure and sand discharging holes arranged on a pump shell, the blade type multiphase booster pump for oil, gas and water can be used for delivering a mixed medium containing sand; a frequency converting device is used as a power driving device and is matched with a multiphase fluid buffering uniformly-mixing device and an automatic monitoring system to ensure that the multiphase pump has good performance with variable working conditions.

Description

Vane Oil-Air-Water Multiphase Booster Pump

Technical field:

The invention relates to a multiphase booster pump, in particular to a vane type oil-gas-water multiphase booster pump, which belongs to the technical fields of mechanical manufacturing and multiphase flow.

Background technique:

In the late 1980s, with the transformation of the oil industry from land to oceans and deserts with relatively harsh natural environments, from relatively concentrated large oil and gas fields to the development of small marginal oil and gas fields and satellite oil fields, long-distance Oil and gas multiphase mixed transportation technology, which transports untreated multiphase well flow, has attracted extensive attention from major oil companies for its remarkable technical advantages and considerable economic benefits. However, due to the complexity of multiphase flow and the limitations of our understanding of multiphase flow, in the long-distance transportation of oil, gas and water multiphase well flow, the traditional gas-liquid separation, pressurization and transportation through pumps and compressors respectively In some short-distance mixed transportation pipelines, the method of gas-liquid pressurization and then mixed transportation also occupies a considerable proportion. The root of it lies in the oil-gas-water multiphase pressurization technology suitable for field application That is to say, the development of multiphase pump itself is quite difficult. The key to this technical research is to find a design method of multiphase pump that takes into account the performance of both pump and compressor.

Foreign countries have achieved some preliminary research results in the development of multiphase booster pumps, and nearly 10 different types of multiphase pumps have been trial-produced, the most representative of which are the research results of the Poseidon project. Twin-screw multi-phase mixed pump produced by German Bornemann pump company. At present, these two pumps have been partially industrialized products, and have been applied in the development of onshore, offshore oilfields and deepwater oilfields all over the world. But so far, the performance of multiphase booster pumps is far from meeting the actual needs of the oil field. On the one hand, due to the complexity of multiphase flow and the dependence of the pump on the flow state and gas content The scope of application of the multiphase pump is still limited; on the other hand, the performance and efficiency of the multiphase pump under the condition of high inlet gas-liquid ratio need to be improved. When the inlet gas volume content of the screw axial flow pump reaches 50%, the best efficiency is only about 45%, while the twin-screw multiphase pump is sensitive to solid particles on the one hand, and at the same time has a larger volume. After the volume content of the imported gas exceeds 70%, its efficiency also decreases rapidly. A series of technical issues such as sealing and lubrication. As far as the actual situation in our country is concerned, on the one hand, due to the strict secrecy of existing key technology products abroad, and on the other hand, due to the characteristics of high viscosity, high coagulation, sand content, and large oil-gas ratio of Chinese oil products, foreign imported A series of technical problems have also appeared and encountered in the field use of multi-phase pumps in oilfields, such as the adaptability of multi-phase pumps to convective patterns, dry running, vibration, seal leakage, impurity stuck shafts, etc., so the development of multi-phase pumps suitable for my country's oilfield characteristics A phase pump is imperative.

In my country, as early as the 1960s, Daqing Oilfield and Shengli Oilfield had developed three-screw and single-screw multiphase pumps, but due to technical difficulties or other reasons, they could not continue to study in depth. Since the 1990s, based on the principle of combining introduction with development and research, major oil companies in my country have, on the one hand, introduced more mature equipment from abroad to carry out applied research on land oil fields or offshore platforms; The pump research work, the twin-screw pump developed by Tianjin Industrial Pump Factory, 711 Institute of Shipbuilding Industry Corporation, etc., and the single-screw mixed pump developed by Lanzhou Knights Pump Factory have entered the field experiment and application research stage. From the current situation, Both imported and self-designed multi-phase mixed transportation devices have problems of one kind or another during operation. It can be said that the technical problems of multi-phase pumps themselves have restricted the promotion and application of this technology to a certain extent.

The multiphase pumps developed in China are basically volumetric multiphase pumps. Taking the twin-screw multiphase pump as an example, its typical characteristics are medium and small flow rates and medium to high pressure. The experimental prototype of the twin-screw pump multiphase pump currently developed in China Most of them are low-to-medium pressurized and sensitive to solid particles. Under the same design conditions, compared with vane machines, their size and weight are larger; for traditional vane pumps, due to the centrifugal force during high-speed rotation, they have Liquids and gases with different properties are prone to phase separation, which leads to a sharp decrease in the efficiency of the pump or even failure to work under the condition of gas-liquid two-phase flow. When the volume content of the inlet gas reaches 4%, the efficiency of the conventional centrifugal pump decreases rapidly. , when the inlet gas volume content exceeds 10%, it is basically unable to operate; when the inlet gas content exceeds 20%, the efficiency of the axial flow pump decreases sharply until it loses its boosting capacity.

Invention content:

The purpose of the present invention is to provide a vane-type oil-gas-water multiphase booster pump for the deficiencies of the prior art, which takes into account the performance of the pump and compressor, and can ensure that the vanes have a long square channel and a large flow path curvature. Radius, to avoid or delay the occurrence of phase separation between the gas-liquid two phases in the vane channel, and improve the performance of the vane multiphase pump under the condition of multiphase transportation.

Another object of the present invention is to provide a vane-type oil-gas-water multiphase booster pump in view of the deficiencies in the prior art. The structure can transport mixed media with a certain sand content, and the overall vertical structure is adopted to ensure the smallest offshore and underwater installation.

Another object of the present invention is to provide a vane-type oil-gas-water multiphase booster pump and propose an optimal design method for multi-stage pumps, which is of great significance for improving the overall operating performance of multi-phase pumps. .

The purpose of the present invention is achieved through the following technical solutions:

A vane type oil-gas-water multiphase booster pump, at least including a booster device, a bearing, a sealing device and a power unit, wherein the booster unit and the power unit are arranged concentrically with the rotating shaft, and both the booster unit and the power unit pass through the bearing and seal The devices are fixed on their respective rotating shafts. The supercharging device is connected to the power device through a coupling. The power device drives the supercharging device to work. The multiphase fluid is boosted in the supercharging device and then output. Suction unit, multiphase pressurization unit, final diffuser section and pressure discharge chamber.

The final diffuser section is an optimized radial design, and the extrusion chamber is an annular extrusion chamber.

The multi-phase booster unit consists of an impeller and an inter-stage flow regulator, wherein the impeller is fixed on the shaft through a key and rotates accordingly; the inter-stage flow regulator is fixed on the multi-phase pump casing through a connecting device And it is sleeved on the rotating shaft. The interstage fluid state regulator does not rotate with the rotating shaft. A segmented pump casing is arranged outside the impeller and the interstage flow state regulator.

The outer surface of the interstage flow state regulator is provided with more than one guide vane, which is used to guide the flow direction of the fluid and shear larger air masses or liquid plugs.

The impeller adopts a conical hub with a trapezoidal cross-section, and a through hole is opened inside; a keyway is provided to connect the impeller with the rotating shaft; more than one spiral blade is arranged on the outer wall circumference of the impeller, and the blade is from the hub to the rim. Gradually thins. Further, the hub half-cone angle of the impeller is 7°-12°, the blade inlet angle is 3°-12°, and the number of blades is 3-6.

There is more than one multi-phase booster unit, and the pump casings of each multi-phase booster unit are connected end to end and pressed against each other. The top and bottom ends of the first and last two multi-phase booster units are respectively provided with pressure plates, which pass through the A pressing device therebetween is used to fix and compress a plurality of supercharging units; the pressing device is a long bolt.

The above connecting device is a sleeve, the outer wall of the sleeve is fixed on the inner wall of the pump casing, the inner wall is sleeved on the inter-stage flow regulator and the gap with it is set, and the inter-stage flow regulator is sleeved on the rotating shaft of the booster device on, and does not rotate with the shaft. The outer wall of the pump casing of the multi-phase booster device is provided with a cooling coil to prevent the thermal expansion and damage of the impeller, bearing or other components caused by the dry running of the shaft.

There is a suction unit at the inlet of the pressurization device. The suction unit includes a diversion cone and a homogenizing wheel. The top of the diversion cone is aligned with the inlet of the pump body. The bottom of the cone is fixed on the rotating shaft of the supercharging device, and the diversion cone and the homogenizing wheel are used to comb the fluid. A diversion groove is opened on the surface of the outer wall of the diversion cone, which is used to guide the flow of the fluid and shear the air mass or liquid plug. The slotting direction of the diversion groove is consistent with the helical direction of the blade, which is used to further uniformly mix the multiphase flow and prevent sand particles from depositing in front of the diversion cone. The diversion cone and the homogenizing wheel can be connected in one piece.

A cooling coil is arranged on the periphery of the power unit, and an operation panel is also erected on the outside.

In summary, the advantages of the present invention are:

1. The optimized vane-type multiphase pump takes into account the performance of the pump and compressor, which can ensure a long square channel between the vanes and a large radius of curvature of the flow channel, avoiding or delaying the occurrence of phase separation between the gas-liquid two phases in the vane channel , to improve the performance of the vane multiphase pump under multiphase conveying conditions;

2. It adopts an open structure and has a sand discharge structure, which can transport mixed media with a certain sand content.

3. The pump casing is designed with a cooling coil, which can prevent the thermal expansion and damage of the impeller, bearing or other components caused by dry running.

4. It is equipped with imported homogenizer and inter-stage flow state adjustment device to ensure good working conditions and performance of the impellers of the vane multi-phase pump at all stages.

5. It adopts high-speed frequency conversion motor, supplemented by operation monitoring system, and cooperates with multi-phase buffering and mixing device to ensure that the multi-phase pump has good variable working condition performance.

6. The outlet is designed with a radial diffuser section and an extrusion chamber, which can further realize the conversion of pressure energy and provide guarantee for energy exchange and balance between gas and liquid phases.

7. The pump casing adopts a segmented design, which is convenient for maintenance and replacement. There are sand discharge holes at the bottom of the inlet part of the pump casing, which can be used to transport sandy mixed media.

8. The overall structure adopts vertical structure, so as to ensure the smallest offshore and underwater installation size.

9. The optimal design of multi-stage pumps is of great significance to improve the overall performance of multi-phase pumps.

To sum up, the present invention saves equipment and pipeline construction costs, greatly simplifies the process flow of oil and gas gathering and transportation, and reduces operating costs. Economical extraction of oil fields.

Description of drawings:

Fig. 1 is one of structural diagrams of vane type oil-gas-water multiphase booster pump of the present invention;

Fig. 2 is one of the structural schematic diagrams of the multiphase booster unit of the present invention;

Fig. 3 is a schematic cross-sectional view of the impeller of the present invention;

Fig. 4 is a schematic structural diagram of the interstage flow state regulator of the present invention;

Fig. 5 is one of the schematic diagrams of the structure of the diversion cone of the present invention;

Fig. 6 is the second structure schematic diagram of the diversion cone of the present invention;

Fig. 7 is the second structural diagram of the vane type oil-gas-water multiphase booster pump of the present invention;

Fig. 8 is the second structural schematic diagram of the multi-phase booster unit of the present invention.

Detailed ways:

The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

As shown in FIG. 1 , it is a schematic structural diagram of a vane-type oil-gas-water multiphase booster pump of the present invention. It can be seen from the figure that in order to adapt to the application of offshore platforms and future deep-water oil fields, the entire vane multiphase pump adopts a vertical design, mainly composed of a power unit 1, a seal, a bearing unit 2 and a booster unit 3, and the power unit 1 passes through the seal. , the bearing device 2, the shaft coupling and the supercharging device 3 are connected. The multi-phase booster pump requires the rotating shaft to rotate at high speed, so usually the power unit 1 adopts a high-speed frequency conversion explosion-proof motor.

The supercharging device 3 includes a suction unit 31, a multiphase supercharging unit 32, a final diffuser section 33, a pump casing 34 and other auxiliary devices, such as: bearings, seals, lubrication systems, etc., outside the pump casing 34 A cooling coil 35 is also provided.

A suction unit 31 is provided at the inlet of the pressurization device 3, and the suction unit includes a diversion cone 311 and a homogenizing wheel. The cone top of the diversion cone 311 is aligned with the inlet of the pump body, and the cone forms a In the fluid channel, the bottom of the diversion cone 311 is fixed on the rotating shaft, and the diversion cone 311 and the homogenizing wheel play the role of combing the fluid. As shown in Figures 5 and 6, a diversion groove 3111 is provided on the surface of the outer wall of the diversion cone 311 to guide the flow of the fluid. The slotting direction of the diversion groove 3111 is consistent with the helical direction of the blades, which can further mix the multiphase flow evenly and prevent turbulent flow in the diversion section from depositing sand particles in front of the diversion cone. The main function of the diversion groove 3111 is to comb the fluid to ensure that the fluid entering the pump casing has a required velocity field at the inlet. When the velocity distribution is uniform, the hydraulic loss is minimal.

As shown in FIG. 7 , it is the second structural diagram of the vane-type oil-gas-water multiphase booster pump of the present invention. It can be seen from the figure that there is more than one multiphase booster unit 32 , and each booster unit 32 is composed of an impeller 321 and an interstage flow regulator 322 , and a segmented pump casing 322 is arranged outside it. More than one booster unit 32 is compressed by the long bolts 4 outside it.

In the vane type oil-gas-water multiphase booster pump, each booster unit 32 is composed of an impeller 321 and an interstage flow condition regulator 322, and the interstage flow condition regulator 322 is fixed on the pump casing 325 through a sleeve 324, Its structure is shown in Figure 2 and Figure 8. The multi-phase fluid obtains kinetic energy in the high-speed rotating impeller 321, and the function of the interstage flow state regulator 322 is to convert the kinetic energy of the multi-phase fluid into pressure energy, and play a rectification role, that is, to break the air mass discharged from the previous stage. crushed to form a uniform mixed flow, which provides a guarantee for the normal operation of the next-stage impeller. The impeller 321 and the interstage flow regulator 322 force the pump medium to move in the axial direction, effectively slowing down and inhibiting the phase separation of the gas-liquid two-phase medium in the flow channel, and ensuring the uniform flow of the gas-liquid two-phase in the pump, thereby effectively It greatly improves the working performance and efficiency of the pump under multiphase flow conditions. Compared with conventional single-phase pumps, its working inlet gas content ranges from 0-100%, and the efficiency drops when the inlet gas content reaches or exceeds 50%.

The specific structure of the impeller 321 is shown in FIG. 3 . There are four blades 3212 arranged on the outer surface of the impeller 321 in the figure. The hub 3211 has a certain taper, and the blade 3212 gradually becomes thinner from the hub 3211 to the rim. The blade shape takes into account the characteristics of the blade shape of the pump and compressor, so as to ensure that the pressure increase speed along the flow and the vertical flow direction is relatively gentle, so as to prevent or slow down Occurrence of phase separation between gas and liquid phases. Since the selection of parameters has a decisive effect on the flow performance of the impeller, and a reasonable structural design can effectively prevent the gas-liquid two-phase separation, which is a necessary condition for ensuring two-phase transportation. After repeated theoretical and experimental demonstrations, the selection range of the basic design parameters of the blades is shown in Table 1. The optimization and reasonable selection of these parameters provide a guarantee for the good working performance of the pump under the oil-gas-water multiphase condition.

In the vane-type oil-gas-water multiphase booster pump, an interstage flow condition regulator 322 is installed immediately behind the impeller 321. In addition to eliminating the fluid circulation at the outlet of the impeller 321 and converting the kinetic energy of the fluid into pressure energy, it can also Utilize the shearing effect of the guide vane 3221 installed on it to break the air mass or liquid plug formed at the outlet of the impeller 321, adjust the flow state of the gas-liquid two-phase fluid to a certain extent, and provide for the normal operation of the next multi-phase booster unit ensure. The diffuser degree and blade shape of the guide vane 3221 depend on the suction conditions of the compression unit. The suction conditions include: gas-liquid ratio, suction pressure and other conditions, and also depend on the speed of the pump shaft. The specific structure of the guide vane 3221 in the vane type oil-gas-water multiphase booster pump is shown in Figure 4. The hub of the guide vane 3221 is a conical structure, and the streamline method is used in the specific design. The number of guide vanes 3221 in the figure is thirteen.

As shown in FIG. 1 , the end of the pressurizing device 3 is provided with a final diffuser section 33 and a pressure discharge chamber, which are used to realize the transformation of multiphase fluid kinetic energy into pressure energy. The final diffuser section 33 has an optimized radial design, and the discharge chamber can be an annular discharge chamber. On the one hand, it can ensure the further conversion of kinetic energy, and on the other hand, it can also further exchange energy between gas-liquid phases with relative velocity differences. Reduce speed slip.

It can be seen from Figure 1 that, in addition to the above-mentioned main devices, the vane-type oil-gas-water multiphase booster pump also includes auxiliary devices such as bearings, seals, and lubrication. The pump body of the booster pump is designed in sections, which is easy to install and disassemble. There are regular sand removal holes in the first-stage pump body; a cooling water jacket is installed at the last stage of the pump to ensure the pump’s stability under dry running conditions. work performance.

According to the compressibility of the gas, different design parameters are adopted for the blades of the front and rear stages. The focus of the design of the first few stages is to avoid the phase separation between gas and liquid, so the selection of the head coefficient and the selection of the boost value are relatively conservative. The design focus of the first stage is on the mixed supercharging, and the design supercharging value is relatively large.

In addition, the design of the multi-phase pump unit adopts a vertical structure, the motor is on the upper part, and the pump body is on the lower part. Provide a basis for speed adjustment in case of changing conditions.

Table 1 Selection range of impeller design parameters of multiphase booster pump The main parameters of the impeller Ranges selection principle Lift coefficient ψ ₁ 0.17～0.26 Guarantee a certain pressure increase, coordinate with the flow coefficient to determine the pump inlet size Flow coefficient φ ₁ 0.01～0.20 A compromise must be made to ensure two-phase delivery and outer diameter requirements Imported hub ratio htr 0.65～0.95 It is related to the specific speed and increases with the decrease of the specific speed Hub half-cone angleγ 7°～12° Cascade consistency σ 1.6～2.5 It is related to the number of leaves and decreases with the number of leaves Blade inlet angle β ₁ 3°～12° Blade inlet angle of attack Δβ ₁ 2°～9° Blade number Z 3～6 blade maximum thickness δ _MAX At the rim (0.07～0.3)L _Y The thinner the thickness, the better, but it should meet the strength requirements (L _Y : chord length) Exit correction angle Δβ ₂ 1°～5° Flange Radial Clearance 0.15～0.32mm Minimize as much as possible, but should consider the requirements of structure, installation, operation, etc. blade angle β 6°～13° Blade inclination angle θ 0°～6°

When the booster device is used in the design of industrial multi-stage pumps with more than 6 stages, it adopts a segmented design, and the design of the booster unit changes according to the number of stages. At the outlet of the vane-type oil-gas-water multiphase booster pump, there is an extruding unit, which is composed of a radial diffuser section and an extruding chamber, which can further realize the transformation of pressure energy, and provide a bridge between the gas and liquid phases. Guaranteed energy exchange and balance.

Therefore, the present invention will make it possible to pressurize oil, gas and water without separation, that is, multiphase pressurization, save equipment and corresponding pipeline construction costs, greatly simplify the process flow of oil and gas gathering and transportation, and reduce operating costs. Wellhead back pressure, improve the recovery rate of oilfields, and realize the economical exploitation of marginal oilfields, satellite oilfields and deepwater oilfields.

Compared with the volumetric multi-phase pump prototype, the design concept of this system is high speed, low weight, small volume, large flow rate, and has a certain sand prevention function. Considering the platform and future underwater application prospects, the vertical structure is adopted , to facilitate further underwater skid-mounted design.

Compared with general vane pumps, the present invention aims at the deficiencies of the prior art, draws lessons from the design method of single-phase pumps and compressors, and considers the particularity of multiphase fluids, especially gas compressibility, through the design of the overall structure of vane pumps. The optimized design, especially the optimized design of the vane profile that takes into account the performance of the pump and compressor, greatly weakens the phase separation between the gas and liquid in the pump, thus improving the work of the vane pump under multiphase flow conditions to a large extent performance.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention without limitation, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present invention shall be covered by the claims of the present invention.

Claims (11)

1, a kind of blade type oil gas water multiphase booster pump, at least comprise supercharging device, bearing and seal arrangement and power plant, wherein, supercharging device is provided with the rotating shaft of power plant is concentric, be installed in separately the rotating shaft by bearing and seal arrangement respectively, supercharging device links to each other with power plant by coupling, power plant drive supercharging device work, heterogeneous fluid is exported after the supercharging in supercharging device, it is characterized in that: described supercharging device, seal arrangement and power plant adopt vertical structure, described supercharging device is the suction unit that connects successively, heterogeneous compress cell, radially final stage diffuser of You Huaing and annular delivery chamber, the pump housing of described heterogeneous compress cell adopts the segmented pump case, be provided with the hole of removing sand in the chopped-off head pump housing, in the final stage of pump cooling jacket be housed, described power plant are the frequency conversion anti-explosion motor; Described heterogeneous compress cell is made up of impeller, inter-stage fluidised form regulator, and wherein, impeller is installed in the rotating shaft by key, and rotates thereupon; Inter-stage fluidised form regulator is installed on the multiphase pump housing by connection set and is set in the rotating shaft, inter-stage fluidised form regulator does not rotate with rotating shaft, outer peripheral at impeller and inter-stage fluidised form regulator is provided with the segmented pump case, the head coefficient of described impeller is 0.17～0.26, flow coefficient is 0.01～0.20, the import hub ratio is 0.65～0.95, the wheel hub semi-cone angle is 7 °～12 °, cascade solidity is 1.6～2.5, inlet blade angle is 3 °～12 °, the blade inlet incidence angle is 2 °～9 °, and the number of blade is 3～6, and maximum blade thickness is 0.07～0.3 times of chord length, the outlet correction angle is 1 °～5 °, the wheel rim radial clearance is 0.15～0.32mm, and blade angle is 6 °～13 °, and blade pitch angle is 0 °～6 °.

2, blade type oil gas water multiphase booster pump according to claim 1 is characterized in that: described inter-stage fluidised form regulator outer surface is provided with an above stator, is used to dredge the flow direction of fluid and shears air mass or liquid plug.

3, blade type oil gas water multiphase booster pump according to claim 1, it is characterized in that: described impeller adopts tapered wheel hub, and section is trapezoidal, and through hole is offered in its inside; And be provided with the keyway that impeller is connected with rotating shaft; Be provided with the blade of an above screw type on the outer wall circumference of impeller, described blade is attenuation gradually from the wheel hub to the wheel rim.

4, blade type oil gas water multiphase booster pump according to claim 1, it is characterized in that: the pump case tandem array of described each heterogeneous compress cell also pushes against each other, be respectively equipped with pressing plate in top and bottoms first, two the heterogeneous compress cells in end, and this pressing plate is fixed heterogeneous compress cell more than, compress by the hold down gag that wears therebetween.

5, blade type oil gas water multiphase booster pump according to claim 1, it is characterized in that: described connection set is a sleeve, sleeve outer wall is installed on the pump case inwall, its inner wall sleeve is located on the inter-stage fluidised form regulator and with its gap and is provided with, inter-stage fluidised form regulator is set in the rotating shaft of supercharging device, and does not rotate with rotating shaft.

6, blade type oil gas water multiphase booster pump according to claim 1, it is characterized in that: described cooling jacket is the cooling coil that is arranged in the heterogeneous supercharging device pump case outer wall, the thermal expansion and the damage of impeller, bearing or the miscellaneous part that is used to prevent that rotating shaft from causing when doing running.

7, blade type oil gas water multiphase booster pump according to claim 1, it is characterized in that: described supercharging device ingress is provided with the suction unit, this suction unit comprises flow deflecting cone and homogenizing wheel, the vertex of a cone of flow deflecting cone and the inlet of the pump housing align setting, cone and both sides pump case form the fluid passage, the bottom of flow deflecting cone is installed in the rotating shaft of supercharging device, and flow deflecting cone and homogenizing wheel are used to comb straight fluid.

8, blade type oil gas water multiphase booster pump according to claim 7 is characterized in that: offer guiding gutter on the described flow deflecting cone outer wall surface, be used to dredge direction of flow and shear air mass or the liquid plug.

9, blade type oil gas water multiphase booster pump according to claim 8, it is characterized in that: the fluting direction of described guiding gutter is consistent with the Hand of spiral of blade, is used to make multiphase flow further evenly to mix, and prevents that sand grains from depositing before flow deflecting cone.

10, blade type oil gas water multiphase booster pump according to claim 7 is characterized in that: described flow deflecting cone and homogenizing wheel one are connected with.

11, blade type oil gas water multiphase booster pump according to claim 1, it is characterized in that: described power plant periphery is provided with cooling coil, is used to cool off power plant, and operation panel has also been set up in its outside.

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