CN201255145Y - Helical axial flow type oil and gas multiphase flow pump - Google Patents

Abstract

The utility model relates to a helicoid axial-flow oil and gas mixture delivery multi-phase pump, which comprises a suction tube (1), at least one impeller (2), a guide vane body (3) corresponding to the impeller (2), a lower-pressure end mechanical seal (4), a high-pressure end mechanical seal (5), a shaft (6), a pump body (7), a cylindrical rolling bearing (9) and a thrust bearing (10). The shaft (6) is supported on the cylindrical rolling bearing (9) and the thrusting bearing (10). The helicoid axial-flow oil and gas mixture delivery pump further comprises a balancing drum (8) arranged at the outlet side of the impeller (2) and connected with the impeller (2) on the shaft (6) through keys. The utility model has the advantages that multi-phase flow is not needed to be separated, and just one tube is used, thus saving the investment and reducing the running cost.

Description

Screw axis streaming oil and gas multiphase flow multiphase pump

Technical field

The utility model relates to a kind of pump, relates in particular to a kind of screw axis streaming oil and gas multiphase flow multiphase pump.

Background technique

Oil wells etc. contain oil, the conveying of multiphase flows such as natural gas, traditional way is with Oil-gas Separation, liquid is carried with water pump, gas with compressor pressurizes after by special pipe to carrying, so just need increase separation equipment and compressor, and have two pipelines at least.

Because gas, liquid two-phase proportion difference, when carrying with common centrifugal pump, gas, liquid separate, and when gassiness concentration acquired a certain degree, air accumulation stopped up runner, causes cutout, stops pumping; Therefore, existing multiphase pump is screw pump isometric(al) formula pump mostly.

Summary of the invention

The utility model technical issues that need to address have provided a kind of screw axis streaming oil and gas multiphase flow multiphase pump, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: suction pipe, and at least more than one impeller, with the corresponding diffuser of impeller, low pressure terminal envelope, high pressure terminal envelope, axle, the pump housing, cylinder rolling bearing, thrust-bearing; Described axle is bearing on cylinder rolling bearing and the thrust-bearing; Also comprise a balancing drum; Described balancing drum is connected on the axle by key at the outlet side of impeller and with impeller.

Compared with prior art, the beneficial effects of the utility model are: needn't separate multiphase flow, only with a pipeline, can reduce investment outlay, reduce operating cost.

Description of drawings

Fig. 1 is the utility model section of structure.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

As seen from Figure 1: the utility model comprises: suction pipe 1, and at least more than one impeller 2, with impeller 2 corresponding diffusers 3, low pressure terminal envelope 4, high pressure terminal envelope 5, axle 6, the pump housing 7, cylinder rolling bearing 9, thrust-bearing 10; Described axle 6 is bearing on cylinder rolling bearing 9 and the thrust-bearing 10; Also comprise a balancing drum 8; Described balancing drum 8 is connected by key on the axle 6 at the outlet side of impeller 2 and with impeller 2;

The number of blade of the number of blade of described diffuser 3 and impeller 2 is prime number each other;

Described impeller is the screw axis streaming, and its cornerite is at 230 °～290 °;

Described axle 6 is by axle sleeve and impeller 2 parcels, and the number range of the diameter of axle satisfies first critical speed of rotation and is higher than the pump operation rotating speed more than 20%.

The utility model is by flow passage components such as multi-stage impellers, stator, can be to the supercharging of liquid-gas two-phase flow body, thus reach the purpose of conveying, the two-phase fluid of conveying, its air content can reach 0-95%.

Impeller and diffuser are formed a compression stage in the utility model, lift by blade is given fluid with transformation of energy, be converted to kinetic energy and pressure energy, in diffuser, fluid further slows down, kinetic energy is converted to pressure energy. because impeller hub has tapering, the flow axis face velocity is cumulative to outlet from import, and vane airfoil profile does not produce gas, liquid separates.

Fluid enters from suction pipe, pressurizes in the compression stage of impeller and diffuser composition, and by the pump housing, kinetic energy further is converted to pressure energy, flows out from pump housing outlet.

In the utility model, be installed in the balancing drum on the axle, balance is because the axial force that pressure reduction produces before and after the impeller has reduced the axial force load that thrust-bearing bears effectively; The balancing drum balancing axial thrust, stable in the multiphase flow medium, processing, easy to manufacture.

The single-stage lift of wheel is 40m～60m; Be the screw axis streaming, its streamline is longer, and cornerite is at 230～290 °, and the energy load on the unit blade is lower, so pump has higher efficient.

The number of blade of stator and impeller blade number be prime number each other, and runner section wetted perimeter is big as far as possible, and the runner loss is little.

Parcels such as pump shaft 6 usefulness axle sleeves and impeller directly do not contact with fluid, prevent corrosion.The pump shaft diameter is got higher value, guarantees that rotor has intrinsic first critical speed of rotation greater than revolution speed 20%.Enough rigidity are arranged, and the combined deflection of axle machine sealing position is less than 0.05mm.

Progression by the increase and decrease impeller can change lift of pump.

Embodiment of the present utility model, its design parameter is: flow 180～220 (m ³/ h), lift 150～220 (m), rotating speed 2960 (r/min).The pump shaft overstriking, good rigidly, machine sealing position is satisfying under the condition of intensity, and the diameter of axle gets the small value, to reduce the linear velocity at sealing surface place, the sealing effect that can obtain.

Claims (4)

1, a kind of screw axis streaming oil and gas multiphase flow multiphase pump comprises: suction pipe (1), and at least more than one impeller (2) is with the corresponding diffuser of impeller (2) (3), low pressure terminal envelope (4), high pressure terminal envelope (5), axle (6), the pump housing (7), cylinder rolling bearing (9), thrust-bearing (10); Described axle (6) is bearing on cylinder rolling bearing (9) and the thrust-bearing (10); It is characterized in that: also comprise a balancing drum (8); Described balancing drum (8) is connected by key on the axle (6) at the outlet side of impeller (2) and with impeller (2).

2, screw axis streaming oil and gas multiphase flow multiphase pump according to claim 1, it is characterized in that: the number of blade of described diffuser (3) and the number of blade of impeller 2 be prime number each other.

3, screw axis streaming oil and gas multiphase flow multiphase pump according to claim 1 and 2, it is characterized in that: described impeller is the screw axis streaming, its cornerite is at 230 °～290 °.

4, screw axis streaming oil and gas multiphase flow multiphase pump according to claim 1 and 2 is characterized in that: described axle (6) is by axle sleeve and impeller (2) parcel, and the number range of the diameter of axle satisfies first critical speed of rotation and is higher than the pump operation rotating speed more than 20%.