Gas-liquid mixed delivery pump
By using a tapered suction chamber and nozzle jet to break up gas phase agglomeration, combined with the synergistic effect of a centrifugal impeller and diffuser, the flow channel blockage problem of traditional gas-liquid mixing pumps under high gas content conditions is solved, achieving uniform mixing and stable delivery of gas-liquid media, and improving operational reliability and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN PUMP & VALVE GENERAL FACTORY CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-06-16
AI Technical Summary
In traditional centrifugal gas-liquid mixing pumps, under conditions of low inlet pressure and high gas content, the gas and liquid two-phase media undergo non-uniform phase evolution in the impeller flow channel. The gas phase is prone to coalescing into discrete large air masses, which block the continuous flow path of the liquid phase, resulting in a decrease in conveying efficiency or even loss of work capacity, affecting reliability and the scope of engineering applications.
The system employs a tapered conical suction chamber in conjunction with sidewall nozzles to form a high-speed jet that breaks up gas phase agglomeration. A three-stage gas phase suppression system consisting of a centrifugal impeller and a diffuser ensures uniform gas-liquid mixing and prevents the gas phase from separating from the liquid phase due to sudden changes in flow velocity.
It effectively blocks the path of gas mass formation, improves the operational reliability and delivery stability of gas-liquid mixed transport pumps under complex working conditions, and eliminates the risk of flow channel blockage and efficiency reduction of traditional pumps under high gas content conditions.
Smart Images
Figure CN224364083U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pump technology, and in particular to a gas-liquid mixed transport pump. Background Technology
[0002] In the fields of oil and gas extraction, as well as chemical, new energy and other industrial sectors, the efficient and stable transportation of gas-liquid two-phase media is a core element in achieving full-process safety optimization and efficient resource utilization.
[0003] Traditional centrifugal gas-liquid mixed-transfer pumps, as the mainstream equipment in this field, are designed based on single-phase fluid dynamics, using the centrifugal force generated by impeller rotation to perform work on the medium. However, under conditions of low inlet pressure and high gas content, the gas and liquid two-phase media undergo non-uniform phase evolution within the impeller flow channel, with the gas phase easily coalescing to form discrete large gas clouds. These gas clouds block the continuous flow path of the liquid phase, weakening the kinetic energy transfer efficiency between the impeller and the liquid phase. This leads to a sharp drop in the pump's conveying efficiency or even complete loss of its work-performing capacity, severely limiting its reliability and engineering application range in complex gas-liquid media conveying scenarios. Utility Model Content
[0004] This application provides a gas-liquid mixed transport pump, which solves the technical problems mentioned in the background art.
[0005] This application provides a gas-liquid mixing pump, including a pump body, a bearing housing, a centrifugal impeller, a rotating shaft, a mechanical seal assembly, and a diffuser. The pump body has a tapered suction chamber at its front end and a discharge chamber at its top. The pump body is detachably connected to the bearing housing. One end of the rotating shaft passes through the bearing housing and extends into the pump body. The mechanical seal assembly is sleeved on the rotating shaft and located inside the bearing housing. The centrifugal impeller is fixedly sleeved on the rotating shaft and located within the pump body. A nozzle is provided on the side wall of the tapered suction chamber near the front end of the centrifugal impeller. The nozzle is connected to the inlet pipe of the mixing pump. Part of the liquid phase in the inlet pipe is accelerated by the nozzle to form a high-speed jet, which is directly sprayed towards the inlet area of the centrifugal impeller to break up gas phase agglomeration. The diffuser is located between the outlet of the centrifugal impeller and the inlet of the discharge chamber to reduce the flow velocity of the gas-liquid mixing medium and convert kinetic energy into pressure energy, preventing the gas phase from separating from the liquid phase due to sudden changes in flow velocity. The outlet of the discharge chamber is connected to the outlet pipe of the mixing pump.
[0006] In one possible implementation, the gas-liquid mixing pump further includes a bubble dispersion plate; the bubble dispersion plate is installed in the converging conical suction chamber.
[0007] In one possible implementation, the gas-liquid mixing pump further includes a fully open swirl impeller; the fully open swirl impeller is fixedly sleeved on the rotating shaft and located on the side of the centrifugal impeller away from the bearing housing, and its outlet is in fluid communication with the inlet of the centrifugal impeller; the jet direction of the nozzle is directed towards the inlet of the fully open swirl impeller.
[0008] In one possible implementation, the gas-liquid mixing pump further includes a helical impeller; the helical impeller is sleeved on the rotating shaft and located on the side of the centrifugal impeller away from the bearing housing, and its outlet is in fluid communication with the inlet of the centrifugal impeller; the jet direction of the nozzle is directed towards the inlet of the helical impeller.
[0009] In one possible implementation, the diffuser is a single-cone diffuser or a multi-stage diffuser with increasing cone angles.
[0010] In one possible implementation, the tapered suction chamber has a cone angle of 8-15° to increase the liquid flow rate and enhance the inlet turbulence effect of the centrifugal impeller.
[0011] One or more technical solutions provided in the embodiments of this application have at least the following technical effects:
[0012] When the gas-liquid mixing pump provided in this application is running, the gas-liquid two-phase medium in the inlet pipeline first enters the converging conical suction chamber, which accelerates the medium flow rate and enhances the turbulence effect. The nozzles on the side wall of the converging conical suction chamber draw in part of the liquid phase to form a high-speed jet, which directly impacts the inlet area of the centrifugal impeller, forcibly breaking up the gas phase agglomeration and promoting gas-liquid mixing. After being centrifugally pressurized by the centrifugal impeller, the medium enters the diffuser for deceleration and pressurization, preventing the gas phase from leaving the liquid phase flow field due to sudden changes in flow rate. Finally, the homogenized medium is stably output from the discharge chamber. This application utilizes the synergistic effect of a tapered suction chamber and a side-wall nozzle jet to construct a three-stage gas phase suppression system during the medium intake stage: "liquid phase acceleration - bubble breakage - centrifugal force field dispersion". The tapered suction chamber accelerates the formation of a highly turbulent liquid phase, the nozzle jet breaks up gas phase agglomerates by impacting them with a high-speed liquid column, and the centrifugal impeller further disperses microbubbles evenly in the liquid phase through a strong centrifugal force field. The coupling effect of these three mechanisms completely blocks the gas agglomeration path, eliminating the risk of flow channel blockage and precipitous efficiency drop caused by gas phase coalescence in traditional pumps under high gas content conditions, and improving the operational reliability and delivery stability of gas-liquid mixed transport pumps under complex conditions. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the structure of the gas-liquid mixing pump provided in the embodiments of this application;
[0015] Figure 2 This is a schematic diagram of the structure of a single-cone diffuser provided in an embodiment of this application;
[0016] Figure 3 A schematic diagram of the structure of a multi-stage diffuser with increasing cone angle provided in an embodiment of this application;
[0017] Figure 4 A flow diagram of the diffuser provided in an embodiment of this application.
[0018] Icons: 1-Pump body; 11-Converging conical suction chamber; 12-Discharge chamber; 2-Bearing housing; 3-Centrifugal impeller; 4-Rotating shaft; 5-Mechanical seal assembly; 6-Diffuser; 61-Single cone angle diffuser; 62-Multi-stage diffuser with increasing cone angle; 7-Bubble dispersion plate; 8-Fully open swirl impeller; 9-Nozzle. Detailed Implementation
[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0020] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0021] This application provides a gas-liquid mixed transport pump, such as... Figures 1 to 4 As shown, the gas-liquid mixing pump includes a pump body 1, a bearing housing 2, a centrifugal impeller 3, a rotating shaft 4, a mechanical seal assembly 5, and a diffuser 6. The pump body 1 has a tapered suction chamber 11 at its front end and a discharge chamber 12 at its top. The pump body 1 is detachably connected to the bearing housing 2. In this application, the discharge chamber 12 is a volute. One end of the rotating shaft 4 passes through the bearing housing 2 and extends into the pump body 1. The mechanical seal assembly 5 is fitted onto the rotating shaft 4 and located within the bearing housing 2. The centrifugal impeller 3 is fixedly fitted onto the rotating shaft 4 and located within the pump body 1. A nozzle 9 is provided on the side wall of the tapered suction chamber 11 near the front end of the centrifugal impeller 3. The nozzle 9 is connected to the inlet pipe of the mixing pump. A portion of the liquid phase in the inlet pipe is accelerated by the nozzle 9 to form a high-speed jet, which is directly sprayed towards the inlet area of the centrifugal impeller 3 to break up gas phase agglomeration and promote gas-liquid mixing. The diffuser 6 is located between the outlet of the centrifugal impeller 3 and the inlet of the discharge chamber 12. It is used to reduce the flow velocity of the gas-liquid mixture and convert kinetic energy into pressure energy, preventing the gas phase from separating from the liquid phase due to sudden changes in flow velocity. The outlet of the discharge chamber 12 is connected to the outlet pipeline of the mixing pump.
[0022] It should be noted that when the gas-liquid mixed transport pump is running, the gas-liquid two-phase medium in the inlet pipeline first enters the converging conical suction chamber 11. The converging conical suction chamber 11 accelerates the medium flow rate and enhances the turbulence effect. The nozzles 9 on the side wall of the converging conical suction chamber 11 extract part of the liquid phase to form a high-speed jet, which directly impacts the inlet area of the centrifugal impeller 3, forcibly breaking up the gas phase agglomeration and promoting gas-liquid mixing. After being centrifugally pressurized by the centrifugal impeller 3, the medium enters the diffuser 6 for deceleration and pressurization to prevent the gas phase from leaving the liquid phase flow field due to sudden changes in flow rate. Finally, the homogenized medium is stably output from the discharge chamber 12. This application utilizes the synergistic effect of the tapered suction chamber 11 and the jet from the side-wall nozzle 9 to construct a three-stage gas phase suppression system during the medium intake stage: "liquid phase acceleration - bubble breakage - centrifugal force field dispersion". The tapered suction chamber 11 accelerates the formation of a highly turbulent flow field in the liquid phase, the jet from the nozzle 9 impacts and breaks up the gas phase agglomerates with a high-speed liquid column, and the centrifugal impeller further disperses microbubbles evenly in the liquid phase through a strong centrifugal force field. The coupling effect of the three mechanisms completely blocks the gas agglomeration path, eliminating the risk of flow channel blockage and precipitous efficiency drop caused by gas phase coalescence in traditional pumps under high gas content conditions, and improving the operational reliability and delivery stability of the gas-liquid mixed transport pump under complex conditions.
[0023] In this embodiment, the gas-liquid mixing pump further includes a bubble dispersion plate 7. The bubble dispersion plate 7 is installed inside the tapered suction chamber 11 and is used to break up large upstream bubbles into microbubbles before they enter the centrifugal impeller 3.
[0024] It should be noted that the bubble dispersion plate 7 in this application is a porous bubble dispersion plate.
[0025] In this embodiment, the gas-liquid mixing pump further includes a fully open swirl impeller 8. The fully open swirl impeller 8 is fixedly sleeved on the rotating shaft 4 and located on the side of the centrifugal impeller 3 away from the bearing housing 2, and its outlet is in fluid communication with the inlet of the centrifugal impeller 3. The jet direction of the nozzle 9 is directed towards the inlet of the fully open swirl impeller 8.
[0026] It should be noted that the jet from nozzle 9 in this application forms an initial impact and breakage by directly hitting the inlet of the spiral impeller with a high-speed liquid column. The fully open swirling impeller 8 performs deep refining treatment on the gas-liquid mixture through the high shear stress generated by the strong swirling flow field, so that the gas phase is fully dispersed into micron-sized bubbles and uniformly embedded in the liquid phase continuum before entering the centrifugal impeller 3, thereby reducing the phenomenon of agglomerated gas in the flow channel of the centrifugal impeller 3.
[0027] In this embodiment, the gas-liquid mixing pump further includes a helical impeller. The helical impeller is fitted onto the rotating shaft 4 and located on the side of the centrifugal impeller 3 away from the bearing housing 2, and its outlet is in fluid communication with the inlet of the centrifugal impeller 3. The jet direction of the nozzle 9 is directed towards the inlet of the helical impeller.
[0028] It should be noted that the spiral impeller, through the continuous torsional shearing caused by the spiral flow channel, performs deep refining of the gas-liquid mixture, so that the gas phase is fully dispersed into micron-sized bubbles and uniformly embedded in the liquid phase continuum before entering the centrifugal impeller 3.
[0029] In this embodiment, the diffuser 6 is a single-cone diffuser 61 or a multi-stage diffuser 62 with increasing cone angles.
[0030] It should be noted that under low gas content conditions, the single-cone diffuser 61 maintains efficient pressure energy conversion with a continuously gradually changing flow channel structure; while under high gas content conditions, the multi-stage diffuser 62 with increasing cone angle uses a staged diffusion strategy to enhance the gas-liquid interface shear by utilizing surface eddies generated by abrupt angle changes. This continuously peels off gas phase agglomerates attached to the wall and entrains them into the mainstream liquid phase. At the same time, the gas phase has a certain buffering effect on the backflowing liquid phase, reducing the abrupt change in flow velocity and suppressing the eddy hydraulic losses generated by the backflow of the liquid phase. This solves the gas phase transportation problem and helps improve the internal flow efficiency of the mixed-transport pump.
[0031] like Figure 2 As shown, the cone angle of the single-cone diffuser 61 is 4.
[0032] like Figure 3 As shown, the cone angle of each segment of the multi-segment diffuser 62 with increasing cone angle is 1, 2, 3, where 3>2>1.
[0033] In this embodiment, the cone angle of the tapered conical suction chamber 11 is 8-15°, which is used to increase the medium flow rate and enhance the inlet turbulence effect of the centrifugal impeller 3.
[0034] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.
[0035] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.
Claims
1. A gas-liquid mixing pump, characterized in that, It includes a pump body (1), a bearing housing (2), a centrifugal impeller (3), a rotating shaft (4), a mechanical seal assembly (5), and a diffuser (6); The pump body (1) has a tapered suction chamber (11) at the front end and a discharge chamber (12) at the top. The pump body (1) is detachably connected to the bearing housing (2). One end of the rotating shaft (4) passes through the bearing housing (2) and extends into the pump body (1). The mechanical seal assembly (5) is sleeved on the rotating shaft (4) and located inside the bearing housing (2). The centrifugal impeller (3) is fixedly sleeved on the rotating shaft (4) and located inside the pump body (1); The tapered suction chamber (11) is provided with a nozzle (9) on the side wall near the front end of the centrifugal impeller (3). The nozzle (9) is connected to the inlet pipe of the mixing pump. Part of the liquid phase in the inlet pipe is accelerated by the nozzle (9) to form a high-speed jet, which is directly sprayed into the inlet area of the centrifugal impeller (3) to break up the gas phase agglomeration. The diffuser (6) is located between the outlet of the centrifugal impeller (3) and the inlet of the pressure chamber (12) to reduce the flow rate of the gas-liquid mixing medium and convert kinetic energy into pressure energy, so as to prevent the gas phase from separating from the liquid phase due to sudden changes in flow rate; the outlet of the pressure chamber (12) is connected to the outlet pipeline of the mixing pump.
2. The gas-liquid mixing pump according to claim 1, characterized in that, It also includes a bubble dispersion plate (7); the bubble dispersion plate (7) is installed inside the tapered conical suction chamber (11).
3. The gas-liquid mixing pump according to claim 1, characterized in that, It also includes a fully open swirl impeller (8); The fully open swirl impeller (8) is fixedly sleeved on the rotating shaft (4) and located on the side of the centrifugal impeller (3) away from the bearing housing (2), and its outlet is in fluid communication with the inlet of the centrifugal impeller (3); The jet direction of the nozzle (9) is directed toward the inlet of the fully open swirl impeller (8).
4. The gas-liquid mixing pump according to claim 1, characterized in that, It also includes a spiral impeller; The spiral impeller is sleeved on the rotating shaft (4) and located on the side of the centrifugal impeller (3) away from the bearing housing (2), and its outlet is in fluid communication with the inlet of the centrifugal impeller (3); The jet direction of the nozzle (9) is directed toward the inlet of the helical impeller.
5. The gas-liquid mixing pump according to claim 1, characterized in that, The diffuser (6) is a single-cone diffuser (61) or a multi-stage diffuser with increasing cone angle (62).
6. The gas-liquid mixing pump according to claim 1, characterized in that, The tapered conical suction chamber (11) has a cone angle of 8-15°, which is used to increase the liquid flow rate and enhance the inlet turbulence effect of the centrifugal impeller (3).