阅读说明：本技术 一种实验用可视化的多级混输泵 (Visual multistage mixed transportation pump for experiments ) 是由 罗兴锜 闫思娜 孙帅辉 张乐福 陈森林 冯建军 朱国俊 于 2020-11-30 设计创作，主要内容包括：本发明的公开了一种实验用可视化的多级深海混输泵,包括有机玻璃外壳,有机玻璃外壳,为长方体状中空结构,有机玻璃外壳,两端分别固定设置入口挡板和内侧出口挡板；内侧出口挡板上设置与有机玻璃外壳同轴的出口轴承座,出口轴承座连接出流段,出流段连接外侧出口挡板,外侧出口挡板固定连接有出口连接管；本发明解决现有实验泵可视化结构在高压及高转速工况进行高速摄像,无法清晰地观测泵进出口段以及每一级泵流道内的流场分布的问题。(The invention discloses a visual multistage deep sea mixed transportation pump for experiments, which comprises an organic glass shell, wherein the organic glass shell is of a cuboid hollow structure, and an inlet baffle and an inner side outlet baffle are fixedly arranged at two ends of the organic glass shell respectively; an outlet bearing seat coaxial with the organic glass shell is arranged on the inner side outlet baffle plate, the outlet bearing seat is connected with an outflow section, the outflow section is connected with the outer side outlet baffle plate, and an outlet connecting pipe is fixedly connected with the outer side outlet baffle plate; the invention solves the problem that the existing visual structure of the experimental pump can not clearly observe the flow field distribution in the inlet and outlet sections of the pump and the flow channel of each stage of the pump when high-speed camera shooting is carried out under the working conditions of high pressure and high rotating speed.)

1. The visual multistage deep sea mixed transfer pump for the experiment is characterized by comprising an organic glass shell (19), wherein the organic glass shell (19) is of a rectangular hollow structure, and an inlet baffle (2) and an inner side outlet baffle (5) are fixedly arranged at two ends of the organic glass shell (19) respectively;

an outlet bearing seat coaxial with the organic glass shell (19) is arranged on the inner outlet baffle (5), the outlet bearing seat is connected with the outflow section (3), the outflow section (3) is connected with the outer outlet baffle (14), and the outer outlet baffle (14) is fixedly connected with an outlet connecting pipe (4);

organic glass shell (19) upper portion is close to entry baffle (2) lateral wall and sets up entry connecting pipe (8), fixed connection bearing box (7) are gone up in entry baffle (2), set up in bearing box (7) with organic glass shell (19) coaxial bearing box rotation axis (9), set up rotating pump shaft (10) in organic glass shell (19), rotating pump shaft (10) are connected bearing box rotation axis (9), rotating pump shaft (10) fixed the cup joint a plurality of levels of rotating impeller (13), rotating impeller (13) cooperation sets up stator (12).

2. The multistage deep-sea mixing pump for experimental visualization according to claim 1, wherein one end of the bearing box rotating shaft (9) far away from the organic glass shell (19) is connected with a torque tachometer, and the torque tachometer is connected with a motor; the bearing box rotating shaft (9) is sequentially sleeved with a water throwing ring (18), a pump inlet mechanical seal (17) and a support bushing (16) in parallel.

3. The visual multistage deep sea multiphase pump for experiments according to claim 1, wherein an inlet bearing seat coaxial with an organic glass shell (19) is arranged on the inlet baffle (2), one end of a pump shaft (10) penetrates through the inlet bearing seat to extend into the organic glass shell (19) and is connected with a bearing box rotating shaft (9) through a coupler (11), and the other end of the rotating pump shaft (10) is located in the outlet bearing seat.

4. The visual multistage deep sea mixing pump for experiments according to claim 1, characterized in that the four corners of the inlet baffle (2) and the inner side outlet baffle (5) are provided with threaded holes, and the pull rod (1) is arranged in the threaded holes.

5. The multistage deep sea mixed transportation pump for experimental visualization is characterized in that a cover plate is arranged on a vane (12) blade and comprises an upper cover plate and a lower cover plate, the upper cover plate comprises a vane inlet end metal cover plate (21) and a vane outlet end metal cover plate (22) which are positioned at two ends of the upper cover plate, an annular vane organic glass cover plate (20) is bonded between the vane inlet end metal cover plate (21) and the vane outlet end metal cover plate (22), and the vane inlet end metal cover plate (21) and the vane outlet end metal cover plate (22) are metal cover plates with the width of 2mm and are integrally formed with the vane (12) lower cover plate.

6. The multistage deep sea mixing pump for experimental visualization according to claim 4, wherein an inflow section (6) is located between the inlet baffle (2) and the inner side outlet baffle (5), an O-shaped sealing ring (14) is arranged between the inflow section (6) and the organic glass shell (19) of the first stage pump, between the inflow section (6) and the inlet baffle (2), and between the organic glass shell (19) of the last stage pump and the inner side outlet baffle (5).

7. The multistage deep sea multiphase pump for experimental visualization according to claim 5, wherein spring rings (15) are arranged at the inlet and outlet ends of the multistage pump on the pump shaft (10).

8. The multistage deep-sea mixing pump for experimental visualization according to claim 4, wherein the pull rod (1), the inlet baffle (2) and the inner outlet baffle (5) are made of metal.

9. The multistage deep sea mixing pump for experimental visualization according to claim 2, wherein the bearing box rotating shaft (9) is connected with a rotating shaft at one end of a torque tachometer through a coupling (11), and a rotating shaft at the other end of the torque tachometer is connected with a motor rotating shaft driven by a motor through the coupling (11).

10. The experimental visual multistage deep sea mixing pump according to claim 1, characterized in that the inlet connection pipe (8) is connected with an inlet pump cover, and the outlet connection pipe (4) is connected with an outlet pump cover.

Technical Field

The invention belongs to the technical field of fluid mechanical engineering equipment, and particularly relates to a visual multistage deep sea mixed transportation pump for experiments.

Background

The pump is a machine for conveying fluid, in actual production life, a medium to be conveyed is usually a gas-liquid two-phase mixture, the required lift is high, the existing multistage mixing and conveying pump is formed by serially combining a plurality of pump stages, the structure of each stage of pump is the same, fluid flows in from a pump inlet, enters a first-stage impeller, then enters a guide vane, flows to a next-stage impeller along a guide vane outlet, and finally flows out from a pump outlet. The pressure of multistage mixed flow pump increases along with the increase of pump progression, in order to protect impeller and diffuser, often adopt the stainless steel pump case that thickness is 15mm to couple together pump head pump tail, when multistage mixed transport pump inflow contained gas, the pressure surge of gas-liquid two-phase flow operating mode and the gasbag in the runner all can lead to the pressure rise of pump to reduce, and simultaneously, pressure surge can lead to the vibration of pump and reduce the service life of pump, the gasbag in the runner can seriously restrict the output of pump, influence the performance, can lead to the unable normal operating of pump when serious.

The existing visual structure of the experimental pump is that all the overflowing parts of the pump, including an impeller, a guide vane and a shell, are made of organic glass, and are only suitable for the visual technology of a pump with a small supercharging pressure, but the inlet pressure and the supercharging capacity of the multistage mixed transportation pump are high, the strength of an organic glass material is low, and the pressure resistance is poor, and if the shell of the multistage mixed transportation pump, the guide vane, especially the impeller, which is a rotating overflowing part is made of the integrated organic glass material, the experiment of the working condition of high pressure and high rotating speed cannot be carried out; meanwhile, a cavity is formed between the impeller of the multistage mixing and conveying pump and the upper cover plate of the guide vane and the pump shell, fluid enters the cavity through gaps to form a dead water area, the fluid in the area is gas-liquid two-phase flow, and high-speed camera shooting polishes the inner flow field of the multistage pump through the outside of the pump shell, so that the inner flow field of the pump is captured, and the flowing state of the part of fluid can interfere with the shooting of the flow field of the impeller and the guide vane.

Disclosure of Invention

The invention aims to provide a visual multi-stage deep sea mixed transportation pump for experiments, which solves the problem that the visual structure of the existing experimental pump can not clearly observe the inlet and outlet sections of the pump and the flow field distribution in the flow channel of each stage of the pump when high-speed camera shooting is carried out under the working conditions of high pressure and high rotating speed.

The invention adopts the technical scheme that the visual multistage deep sea mixed transportation pump for the experiment comprises an organic glass shell, wherein the organic glass shell is of a cuboid hollow structure, and an inlet baffle and an inner side outlet baffle are respectively and fixedly arranged at two ends of the organic glass shell;

an outlet bearing seat coaxial with the organic glass shell is arranged on the inner side outlet baffle plate, the outlet bearing seat is connected with an outflow section, the outflow section is connected with the outer side outlet baffle plate, and an outlet connecting pipe is fixedly connected with the outer side outlet baffle plate;

organic glass shell upper portion is close to entry baffle lateral wall and sets up the entry connecting pipe, and fixed connection bearing box on the entry baffle sets up the bearing box rotation axis coaxial with the organic glass shell in the bearing box, sets up the rotatory pump shaft in the organic glass shell, and rotatory pump shaft connects the bearing box rotation axis, and rotatory pump shaft is fixed cup joints a plurality of levels of rotatory impeller, and rotatory impeller cooperation sets up the stator.

The present invention is also characterized in that,

one end of the bearing box rotating shaft, which is far away from the organic glass shell, is connected with a torque tachometer, and the torque tachometer is connected with a motor; the bearing box rotating shaft is sequentially sleeved with the water throwing ring, the pump inlet mechanical seal and the support bushing in parallel.

The inlet baffle is provided with an inlet bearing seat coaxial with the organic glass shell, one end of the pump shaft penetrates through the inlet bearing seat to extend into the organic glass shell and is connected with the bearing box rotating shaft through a coupler, and the other end of the rotating pump shaft is located in the outlet bearing seat.

Threaded holes are formed in four corners of the inlet baffle and the inner side outlet baffle, and pull rods are arranged in the threaded holes.

Set up the apron on the stator blade, the apron includes upper cover plate and lower apron, and the upper cover plate is including stator entrance point metal covering plate, the stator exit end metal covering plate that is located the upper cover plate both ends, is located annular stator organic glass apron of bonding in the middle of stator entrance point metal covering plate and the stator exit end metal covering plate, stator entrance point metal covering plate and stator exit end metal covering plate be width 2mm metal material apron and with stator lower cover plate integrated into one piece.

Be located between entry baffle and the inboard export baffle for the section of flowing into, be located between the organic glass shell of the section of flowing into and first-stage pump, between the section of flowing into and the entry baffle, all set up O type sealing washer between last stage pump organic glass shell and the inboard export baffle.

And spring retainer rings are arranged at the inlet and the outlet of the pump shaft of the multistage pump.

The pull rod, the inlet baffle and the inner side outlet baffle are all made of metal materials.

The bearing box rotating shaft is connected with the rotating shaft at one end of the torque tachometer through a coupler, and the rotating shaft at the other end of the torque tachometer is connected with a motor rotating shaft driven by a motor through a coupler.

The inlet connecting pipe is connected with an inlet pump cover, and the outlet connecting pipe is connected with an outlet pump cover.

The visual multistage deep sea mixed transportation pump for the experiment has the advantages that:

(1) the organic glass shells are connected through a clamping structure, the inlet section and the outlet section are provided with organic glass tubes and fixed by adopting a pull rod structure, the lower cover plate of the impeller made of metal is integrated with the blades, the lower cover plate of the guide vane made of metal is integrated with the blades and the cover plate of the upper cover plate close to the inlet and outlet ends, and the organic glass cover plate of the guide vane is clamped between the metal cover plates at the inlet and outlet ends of the guide vane, so that the operation stability of the pump is ensured and the shooting of a flow field in the guide vane can be realized;

(2) the organic glass shell replaces an impeller, a guide vane upper cover plate and a pump shell which are made of metal materials, and an inlet pipe and an outlet pipe of the organic glass replace an inlet pipe and an outlet pipe which are made of metal materials, so that the inlet flow state of the pump, the flow state of an impeller flow passage, the flow state in a guide vane flow passage and the flow state of an outlet of the pump can be conveniently tested by adopting a high-speed camera shooting technology;

(3) the shape of organic glass shell is square, guarantees that the face of shooing is the plane, causes the influence to the result of shooing when avoiding reflection of light and light refraction when shooing, has avoided the colour of the part that overflows of metal material and fluid color to be close to can't distinguish simultaneously, all adopts baking finish technique to handle the runner of impeller and stator and the blade of connecting, makes the colour that overflows the part surface form contrast with the fluid color, the follow-up data processing of being convenient for.

Drawings

FIG. 1 is a schematic structural diagram of an experimental visual multistage deep sea mixed transportation pump of the present invention;

FIG. 2 is a schematic cross-sectional view A-A of an experimentally visualized multistage deep sea multiphase pump of the present invention;

fig. 3 is a schematic structural diagram of a certain pump stage in the multi-stage deep sea mixed transportation pump for experimental visualization.

In the drawing, 1, a pull rod, 2, an inlet baffle, 3, an outflow section, 4, an outlet connecting pipe, 5, an inner outlet baffle, 6, an inflow section, 7, a bearing box, 8, an inlet connecting pipe, 9, a bearing box rotating shaft, 10, a rotating pump shaft, 11, a coupler, 12, a guide vane, 13, a rotating impeller, 14, an outer outlet baffle, 15, a spring retainer, 16, a support bush, 17, a pump inlet mechanical seal, 18, a water slinging ring, 19, an organic glass shell, 20, an organic glass cover plate for the guide vane, 21, a metal cover plate for the inlet end of the guide vane, and 22, a metal cover plate for the outlet end of the guide vane.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention provides a visual multi-stage deep sea mixed delivery pump structure for experiments, which comprises an organic glass shell 19, wherein the organic glass shell 19 is of a cuboid hollow structure, and an inlet baffle 2 and an inner side outlet baffle 5 are respectively fixedly arranged at two ends of the organic glass shell 19;

an outlet bearing seat coaxial with the organic glass shell 19 is arranged on the inner side outlet baffle 5 and is connected with the outflow section 3, the outflow section 3 is connected with the outer side outlet baffle 14, and the outer side outlet baffle 14 is fixedly connected with an outlet connecting pipe 4;

the inlet baffle 2 is fixedly connected with a bearing box 7, a bearing box rotating shaft 9 coaxial with the organic glass shell 19 is arranged in the bearing box 7, a rotating pump shaft 10 is arranged in the organic glass shell 19, the rotating pump shaft 10 is connected with the bearing box rotating shaft 9, one end, far away from the organic glass shell 19, of the bearing box rotating shaft 9 is connected with a torque tachometer, and the torque tachometer is connected with a motor; a water throwing ring 18, a pump inlet mechanical seal 17 and a support bush 16 are sequentially sleeved on a rotating shaft 9 of the bearing box in parallel, an inlet connecting pipe 8 is arranged on the upper part of an organic glass shell 19 close to the side wall of an inlet baffle 2, an inflow section 6 is arranged between the inlet baffle 2 and an inner side outlet baffle 5, the inlet connecting pipe 8 is connected with an inlet pump cover, an outlet connecting pipe 4 is connected with an outlet pump cover, a pump shaft 10 is connected with the inflow section 6 and the outflow section 3, as shown in fig. 2, an inlet bearing seat coaxial with the organic glass shell 19 is arranged on the inlet baffle 2, one end of the pump shaft 10 penetrates through the inlet bearing seat to extend into the organic glass shell 19 and is connected with the bearing box rotating shaft 9 through a coupler 11, the bearing box rotating shaft 9 is connected with a rotating shaft at one end of a torque tachometer through the coupler 11, and a rotating shaft at the other end of the torque tachometer is connected with a motor rotating shaft driven by a motor through the coupler 11. The other end of the rotary pump shaft 10 is located in the outlet bearing seat, the rotary pump shaft 10 is fixedly sleeved with a plurality of stages of rotary impellers 13, and as shown in fig. 3, the rotary impellers 13 are provided with guide vanes 12 in a matching manner. Set up the apron on the 12 blades of stator, the apron includes upper cover plate and lower apron, and the upper cover plate is including stator entrance point metal covering 21, the stator exit end metal covering 22 that are located the upper cover plate both ends, is located annular stator organic glass apron 20 of bonding in the middle of stator entrance point metal covering 21 and the stator exit end metal covering 22, stator entrance point metal covering 21 and stator exit end metal covering 22 for width 2mm metal material apron and with stator 12 lower apron integrated into one piece. Each stage of pump all is located organic glass shell 19 inside, the first half of the organic glass shell 19 inner wall of each stage of pump cup joints the upper cover plate that acts as the impeller on the impeller, the latter half cup joints in the stator apron outside, the multistage pump couples together through 19 joint structures of organic glass shell, the first stage of pump organic glass shell is close to the type that the inducer is connected with the inflow section with the joint, the other end is connected with the type of joint with the organic glass shell 19 of next stage of pump, last stage of pump organic glass shell 19 and 5 joints of exit shield.

The flow channels of the impeller 13 and the guide vanes 12 and their blades are treated by a baking finish technique.

Threaded holes are formed in four corners of the inlet baffle 2 and the inner side outlet baffle 5, a pull rod 1 is arranged in each threaded hole, and the inlet baffle 2 and the outlet baffle 5 are fixed through the pull rod 1.

O-shaped sealing rings 14 are arranged between the inflow section 6 and an organic glass shell 19 of the first-stage pump, between the inflow section 6 and the inlet baffle 2, and between the organic glass shell 19 of the last-stage pump and the inner side outlet baffle 5,

the pump shaft 10 is provided with spring retainer rings 15 at the inlet and outlet ends of the multistage pump.

The pull rod 1, the inlet baffle 2 and the inner side outlet baffle 5 are all made of metal materials.

The invention relates to a working process and a principle of a visual multistage deep sea mixed delivery pump for experiments, wherein when the multistage pump works, a liquid medium penetrates through an inflow section 6 through an inlet connecting pipe 8 and enters a wheel cover of a first-stage impeller 13, the liquid flows into a guide vane 12 along the wheel cover of the impeller 13 in the radial direction under the rotating action of a wheel disc of the impeller 13, the kinetic energy of the liquid is converted into static pressure energy in the guide vane 12, and the static pressure energy is led out to an outlet connecting pipe 4 through an outflow section 3 after sequentially passing through the multistage impeller 13 and the guide vane 12.

Through the mode, the visual multi-stage deep sea mixed transportation pump for the experiment realizes the visual test of the inlet flow state of the multi-stage pump, the flow state of the impeller flow passage, the flow state in the guide vane flow passage and the flow state of the outlet of the multi-stage pump by adopting the high-speed camera shooting technology.