Multi-condition design method of multiphase pump impeller

A design method and multi-working-condition technology, applied to components, pumps, and pump components of pumping devices for elastic fluids, can solve problems such as reduced pump delivery efficiency, head, flow rate drop, and impact on pump performance, etc., to achieve Excellent hydraulic performance, high efficiency effect

Active Publication Date: 2014-04-23
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, when the pump works in multi-phase such as oil and gas, due to the existence of gas or solid, there is a speed slip between the liquid phase and the gas phase or solid, and the lift and flow of the pump will decrease to a certain extent. Or the increase of solid content, this phenomenon will become more and more obvious, which will reduce the pump delivery efficiency and affect the performance of the pump

Method used

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  • Multi-condition design method of multiphase pump impeller
  • Multi-condition design method of multiphase pump impeller
  • Multi-condition design method of multiphase pump impeller

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Embodiment Construction

[0032] figure 1 with figure 2 Together determine the impeller shape of the embodiment. It is mainly composed of impeller front cover plate (1), impeller rear cover plate (4), blades (6) and hub (7), etc. The number of blades is 3. The present invention adjusts the impeller outlet diameter D through the following relations 2 (3) and impeller outlet width b 2 (5), so that the centrifugal pump performance of this embodiment meets the flow rate Q of our optimal efficiency working condition BEP , the head H of the optimal efficiency condition BEP , the flow Q of the i-th operating point i , the head H of the i-th operating point i , The impeller speed n requirements.

[0033]

[0034]

[0035]

[0036]

[0037]

[0038] In the formula: Q BEP ——the flow rate at the optimal efficiency working condition point, cubic meters per second;

[0039] H BEP ——The head of the optimal efficiency working point, m;

[0040] n sBEP - Specific number of revolutions; ...

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Abstract

The invention relates to a multi-condition design method of a multiphase pump impeller. Geometric parameters of an impeller and the performance requirements of multiple working conditions of a pump are linked together and a multiphase pump which can normally work under the multiple working conditions is designed through adjustment on the geometric parameters of blades. According to the multi-condition design method of the multiphase pump impeller, the requirement that a working performance curve of the multiphase pump is consistent with an actually required performance curve can be met, the multi-condition design method is particularly suitable for the condition that the pump normally runs under the multiple working conditions, and meanwhile the multiphase pump can still maintain the high efficiency during multiple working conditions under the multiphase flow working condition through control on the parameters such as the rotation speed, the specific speed and the like of the pump.

Description

technical field [0001] The invention relates to fluid machinery, in particular to a design method for the impeller of a multiphase mixed pump. Background technique [0002] Multiphase mixed pumps are the most widely used in oil field production. At present, screw mixed pumps are widely used in China, mainly to reduce wellhead back pressure and increase liquid production. However, the solid-phase impurity margin of the screw mixed-transport pump is generally small, and its displacement is also small due to the limitation of the geometric size of the pump, so the screw mixed-transport pump is not suitable for large-displacement oil-gas multi-phase transportation. The vane mixed pump has simple structure, large displacement, strong reliability, good adaptability to solid phase impurities, and can meet the needs of large displacement oil and gas multiphase transportation. In many cases, the multi-phase mixed pump requires a wide high-efficiency area of ​​the pump, that is, it i...

Claims

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Application Information

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IPC IPC(8): F04D29/22F04D31/00
Inventor 付强王秀礼朱荣生
Owner JIANGSU UNIV
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