阅读说明：本技术 一种主动气液分离式螺旋轴流式油气混输泵 (Initiative gas-liquid separation formula screw axial flow formula oil-gas multiphase pump ) 是由 权辉 杜媛英 宋凯 李雅楠 吴永康 于 2020-11-23 设计创作，主要内容包括：本发明公开了一种主动气液分离式螺旋轴流式油气混输泵,包括内轴和外轴,外轴与叶轮连接,离心式叶轮与内轴连接,在离心式叶轮的下方设有通气孔,位于离心式叶轮与蜗壳之间的内轴为螺旋轴,在外轴上设有螺旋轴流道出口,螺旋轴流道出口与蜗壳连通；内轴与外轴通过差速器与电机连接,与现有的油气混输泵相比,现有的油气混输泵是抑制油气的分离,从而确保介质的正常输送,这就导致了介质输送效率低的问题,而本发明是反其道行之,在一开始就通过离心式叶轮将油气进行分离,并且将分离后的油、气单独进行输送,然后在蜗壳混合输出,这样对于不同相介质采用不同输送方式,不但有利于输送高含气率的油气介质,而且能有效的提高泵的输送效率。(The invention discloses an active gas-liquid separation type spiral axial flow oil-gas mixed transportation pump, which comprises an inner shaft and an outer shaft, wherein the outer shaft is connected with an impeller, a centrifugal impeller is connected with the inner shaft, a vent hole is arranged below the centrifugal impeller, the inner shaft positioned between the centrifugal impeller and a volute is a spiral shaft, a spiral shaft flow channel outlet is arranged on the outer shaft, and the spiral shaft flow channel outlet is communicated with the volute; the invention relates to a multi-phase oil-gas mixed transportation pump, which is characterized in that an inner shaft and an outer shaft are connected with a motor through a differential mechanism, compared with the existing oil-gas mixed transportation pump, the existing oil-gas mixed transportation pump inhibits oil-gas separation so as to ensure normal transportation of a medium, thus causing the problem of low medium transportation efficiency.)

1. The utility model provides an initiative gas-liquid separation formula screw axial flow formula oil-gas multiphase pump, includes the suction chamber of pump body front end, the spiral case of pump body rear end, impeller, stator and the transmission shaft in the pump body to and the motor of being connected with the transmission shaft, its characterized in that: the transmission shaft comprises an inner shaft and an outer shaft, the outer shaft is connected with an impeller through a key, a centrifugal impeller is arranged at the rear end of the suction chamber and connected with the inner shaft, a vent hole is formed below a flow guide channel of the centrifugal impeller, the inner shaft between the centrifugal impeller and the volute is a screw shaft, a screw shaft flow channel outlet is formed in the outer shaft at the tail end of the screw shaft, and the screw shaft flow channel outlet is communicated with the volute.

2. The active gas-liquid separation type spiral axial flow oil-gas multiphase pump according to claim 1, characterized in that: the inner shaft and the outer shaft are separately arranged and are connected with the motor through a differential.

Technical Field

The invention relates to an oil-gas mixed transportation pump, in particular to an active gas-liquid separation type spiral axial flow oil-gas mixed transportation pump.

Background

At present, when an existing oil-gas mixed transportation pump conveys an oil-gas medium, the conveyed oil-gas medium is an oil-gas mixture, so that the medium is under the action of centrifugal force in the conveying process, the phenomenon of oil-gas separation is easy to occur, the conveying efficiency is low, and even the problems of high gas content, gas-liquid two phases and the like are difficult to convey.

Disclosure of Invention

The technical task of the invention is to provide an active gas-liquid separation type spiral axial flow oil-gas mixed transportation pump aiming at the defects of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the driving gas-liquid separation type spiral axial flow oil-gas mixed transmission pump comprises a suction chamber at the front end of a pump body, a volute at the rear end of the pump body, an impeller, a guide vane and a transmission shaft which are arranged in the pump body, and a motor connected with the transmission shaft, wherein the transmission shaft comprises an inner shaft and an outer shaft, the outer shaft is connected with the impeller through a key, a centrifugal impeller is arranged at the rear end of the suction chamber and connected with the inner shaft, a vent hole is arranged below a flow guide channel of the centrifugal impeller, the inner shaft between the centrifugal impeller and the volute is a spiral shaft, a spiral shaft flow channel outlet is arranged on the outer shaft at the tail end of the spiral shaft, and the spiral shaft flow.

Further improvement: the inner shaft and the outer shaft are separately arranged and are connected with the motor through a differential.

The invention has the advantages that: compared with the existing oil-gas mixed transportation pump, the oil-gas mixed transportation pump provided by the invention has the advantages that the separation of oil and gas is inhibited, so that the normal transportation of a medium is ensured, and the problem of low medium transportation efficiency is solved.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a partial schematic view of the invention at a in fig. 1.

Fig. 3 is a schematic view of the connection of the centrifugal impeller of the present invention.

Detailed Description

The invention is described in detail below with reference to the drawings.

As shown in fig. 1-3, an active gas-liquid separation type screw axial flow oil-gas mixture pump includes a suction chamber 1 at the front end of a pump body, a volute 6 at the rear end of the pump body, an impeller 3, a guide vane 4 and a transmission shaft in the pump body, and a motor 11 connected with the transmission shaft, wherein the transmission shaft includes an inner shaft 9 and an outer shaft 8, the outer shaft 8 is connected with the impeller 3 through a key 81, a centrifugal impeller 2 is arranged at the rear end of the suction chamber 1, the centrifugal impeller 2 is connected with the inner shaft 9, a vent hole 21 is arranged below a flow guide channel 20 of the centrifugal impeller 2, the inner shaft 9 between the centrifugal impeller 2 and the volute 6 is a screw axis 5, a screw axial flow channel outlet 7 is arranged on the outer shaft 8 at the tail end of the screw axis 5, and the screw axial flow; the inner shaft 9 is arranged separately from the outer shaft 8, and the inner shaft 9 and the outer shaft 8 are connected to an electric motor 11 via a differential 10.

The working principle is as follows: firstly, the conveyed oil-gas medium enters the suction chamber 1 from the inlet, the oil and the gas of the oil-gas medium are separated under the action of the centrifugal impeller 2, the separated oil enters a pressurizing conveying passage consisting of the impeller 3 and the guide vanes 4 from a flow guide passage 20 of the centrifugal impeller 2 and enters the volute 6 at most, the separated gas enters between the inner shaft 9 and the outer shaft 8 from a vent hole 21 of the centrifugal impeller 2, in order to facilitate the flow of the gas, a plurality of vent holes 21 are uniformly distributed on the circumference of the centrifugal impeller 2, the gas enters the volute 6 from the outlet 7 of the spiral shaft flow passage after passing through the gas conveying passage between the inner shaft 9 and the outer shaft 8, and the gas is conveyed out from the outlet after being mixed with the oil gas in the volute 6.

When the inner shaft 9 and the outer shaft 8 are separately arranged, the inner shaft 9 and the outer shaft 8 are connected with the motor 11 through the differential 10, so that the revolution numbers of the inner shaft 9 and the outer shaft 8 can be inconsistent, the gas passes through the inner shaft 9 and the outer shaft 8, the resistance is small, the oil passes through the outer part of the outer shaft 8, the resistance is large, the revolution number of the inner shaft 9 is larger than that of the outer shaft 8, the inner shaft 9 and the outer shaft 8 generate relative rotation, the inner shaft 9 positioned between the centrifugal impeller 2 and the volute 6 is the screw shaft 5, the gas conveying efficiency can be further improved through the rotation speed difference between the outer shaft 8 and the screw shaft 5, and the medium with high gas content can be conveyed.

Compared with the existing oil-gas mixed transportation pump, the existing oil-gas mixed transportation pump inhibits the separation of oil and gas, so that the normal transportation of a medium is ensured, and the problem of low medium transportation efficiency is caused.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.