CN221096961U - Novel double-impeller rotary jet pump with stable operation - Google Patents

Abstract

The utility model discloses a novel double-impeller rotary jet pump with stable operation, which comprises a pump body shell with a centrifugal cavity inside, wherein one side of the pump body shell is fixedly connected with a shell cover through a flange, one side, opposite to the shell cover, of the pump body shell is fixedly connected with a bearing box, the outer end of the bearing box is provided with a main shaft in a penetrating way and connected through a thrust bearing, meanwhile, the inner end of the main shaft extends to the inner side of the pump body shell, and by adopting the radial matching of the opposite double impellers of a first impeller and a second impeller, when liquid enters the action range of the first impeller from a liquid guide tube, the second impeller which is interposed simultaneously can force the liquid in the centrifugal cavity and the impeller to form synchronous rotation, so that the radial flowing pressure is more linear and uniform, the friction loss of liquid mixed medium on a disc body is reduced under the mutual matching, the output efficiency is improved, and a certain axial eccentric force is offset, thereby being beneficial to the stable use and operation of the pump.

Description

Novel double-impeller rotary jet pump with stable operation

Technical Field

The utility model relates to the technical field of rotary jet pumps, in particular to a novel double-impeller rotary jet pump with stable operation.

Background

The rotary jet pump is driven by centrifugal force, pushes substances into a flow channel through an impeller rotating at a high speed, accelerates the substances into an ejector of a radial outlet to form a high-speed jet, and converts the acceleration kinetic energy of liquid into pressure (dynamic-static pressure conversion) in the injection process. When the jet flow changes in the residual tooth-shaped bubble area in the pump, the gas in the pump is dissolved in the liquid to form lower pressure in the pump cavity, and then the surrounding liquid is sucked into the pump, so that the pump realizes self suction.

At present, in the existing working conditions of a low-flow high-pressure injection environment, a single-side impeller structure is usually adopted in the rotary injection pump products at home and abroad, and the rotary injection pump has the characteristics of simple structure, easy maintenance and replacement and the like, but the rotary injection pump has the defects in practical application, for example, when a pump body rotates due to the design of the single-side impeller, the internal impeller cannot effectively drive liquid in a cavity to synchronously push with the liquid, so that the friction loss of a liquid mixing medium on a disc body is increased, the output efficiency of the liquid mixing medium is reduced, and certain axial eccentric force is generated at the same time, so that the use stability of the pump is not facilitated.

Disclosure of utility model

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.

Therefore, the utility model aims to provide a novel double-impeller rotary jet pump with stable operation, so as to solve the problems that the existing single-impeller rotary jet pump in the background art cannot effectively drive liquid in a cavity to synchronously push with the liquid, so that the friction loss of a liquid mixing medium to a disc body is increased, the output efficiency is reduced, and certain axial eccentric force is generated, and the use stability of the pump is not facilitated.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a novel bilobed wheel rotary jet pump of operation stability, its includes the inside pump body shell that has centrifugal chamber, pump body shell one side is through flange fixedly connected with cap, pump body shell is located the opposite side fixedly connected with bearing box of cap, a main shaft that just connects through thrust bearing wears to be equipped with in the bearing box outer end, simultaneously the main shaft inner extends to the pump body shell inboard, the outer end that pump body shell is located the cap has the catheter that extends to the inside centrifugal chamber of pump body shell, just the junction of catheter and cap has mechanical seal, the inside centrifugal chamber of pump body shell has rotor subassembly, rotor subassembly is including setting up in the inside first impeller that is close to cap one side of pump body shell, the inside second impeller that is connected with the main shaft inner that is close to bearing box one side and axle center department of pump body shell, first impeller and second impeller outer diameter face one deck fixedly connected with installation cover.

As a preferable scheme of the novel double-impeller rotary jet pump with stable operation, the inner end of the liquid guide tube is also communicated with a liquid discharge section of a centrifugal cavity in the pump body shell, and the liquid guide tube is matched with the discharge section in a tongue-and-groove mode.

As a preferred scheme of the novel double-impeller rotary jet pump with stable operation, the mechanical seal is a cartridge type sealing mechanical shaft.

As a preferred scheme of the novel double-impeller rotary jet pump with stable operation, the first impeller is radially fixed with a first impeller blade facing to one side of the second impeller, and a through hole for penetrating a liquid guide tube is further formed at the axis of the first impeller.

As a preferable scheme of the novel double-impeller rotary jet pump with stable operation, the second impeller is radially fixed with a circle of second vanes facing one side of the first impeller, and a spline positioning hole connected with the inner end of the main shaft through a key block is arranged at the axis of the second impeller.

As a preferable scheme of the novel double-impeller rotary jet pump with stable operation, the outer end of the pump body shell is also provided with a water inlet pipe which is respectively communicated with the liquid guide pipe and a water outlet pipe which is communicated with the centrifugal cavity inside the pump body shell.

Compared with the prior art, the utility model has the beneficial effects that: this kind of operation stable novel bilobed wheel rotary jet pump is through adopting the radial cooperation of the opposition bilobed wheel of first impeller and second impeller for when liquid gets into the scope of action of first impeller from the catheter, the liquid and the impeller of the centrifugal intracavity can be forced to the second impeller of intervene simultaneously and form synchronous rotation, make radial flow pressure more linear, even, not only reduced the friction loss of liquid mixing medium to the disk body under the cooperation each other, improved its output, still offset certain axle center eccentric force simultaneously, be favorable to the steady use and the operation of pump.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a pump body according to the present utility model;

FIG. 2 is a schematic view of a first vane structure according to the present utility model;

Fig. 3 is a schematic view of a second impeller according to the present utility model.

In the figure: 10. a pump body housing; 11. a cover; 20. a bearing housing; 21. a main shaft; 30. a first impeller; 31. a first vane; 32. a through hole; 40. a second impeller; 41. a second vane; 42. spline positioning holes; 50. a mounting sleeve; 60. a catheter; 61. mechanical sealing; 70. a water inlet pipe; 71. and a water outlet pipe.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.

Next, the present utility model will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Fig. 1 to 3 are all schematic views showing a novel double-impeller rotary jet pump with stable operation according to the present utility model, please refer to fig. 1 to 3, a novel double-impeller rotary jet pump with stable operation according to this embodiment includes a pump body housing 10 having a centrifugal cavity therein, a housing cover 11 fixedly connected to one side of the pump body housing 10 through a flange, a bearing housing 20 fixedly connected to an opposite side of the pump body housing 10 from the housing cover 11, a main shaft 21 penetrating and connected through a thrust bearing at an outer end of the bearing housing 20, an inner end of the main shaft 21 extending to an inner side of the pump body housing 10, a liquid guiding tube 60 extending to the centrifugal cavity inside the pump body housing 10 at an outer end of the housing cover 11, and a mechanical seal 61 provided at a joint between the liquid guiding tube 60 and the housing cover 11, the centrifugal cavity inside the pump body housing 10 having a rotor assembly including a first impeller 30 disposed inside the pump body housing 10 and adjacent to the side of the centrifugal cavity 11, a second impeller 40 disposed inside the pump body housing 10 and adjacent to the bearing housing 20 and connected to an inner end of the main shaft 21 at an axial center, the first impeller 30 and the second impeller 40 being coaxially and parallel fitted, and the first impeller 30 and the second impeller 40 being fixedly connected to the housing 50.

The inner end of the liquid guide tube 60 is also communicated with a liquid discharge section which is positioned in the centrifugal cavity inside the pump body shell 10, and the liquid guide tube 60 is matched with the discharge section in a tongue-and-groove manner; the mechanical seal 61 is a cartridge type mechanical shaft, in practical application, the catheter 60 is mounted in a support body fixedly connected with the pump body housing 10, and the catheter 60 is mounted and positioned by the support body and the mechanical seal 61, so that the detachable structure can be convenient for assembly and later maintenance.

The first impeller 30 is also fixed with a first vane 31 facing to one side of the second impeller 40 in a radial direction, and a through hole 32 for penetrating the liquid guide tube 60 is arranged at the axis of the first impeller 30; the second impeller 40 is radially provided with a circle of second blades 41 which are also fixed on one side facing the first impeller 30, a spline positioning hole 42 which is connected with the inner end of the main shaft 21 through a key block is arranged at the axis of the second impeller 40, and liquid entering the centrifugal cavity can keep synchronous operation with the impellers through the cooperation of the first impeller 30 and the second impeller 40 as well as the first blades 31 and the second blades 41; the outer end of the pump body shell 10 is also provided with a water inlet pipe 70 which is respectively communicated with the liquid guide pipe 60 and a water outlet pipe 71 which is respectively communicated with the centrifugal cavity in the pump body shell 10, when in actual use, by adopting the radial matching of the opposite double impellers of the first impeller 30 and the second impeller 40, when liquid enters the action range of the first impeller 30 from the liquid guide pipe 60, the interposed second impeller 40 can force the liquid in the centrifugal cavity and the impeller to form synchronous rotation, so that the radial flowing pressure is more linear and uniform, and under the mutual matching, the friction loss of liquid mixing medium on the disk body is reduced, the output efficiency is improved, and meanwhile, certain axial eccentric force is offset, thereby being beneficial to the stable use and operation of the pump.

In summary, when the novel double-impeller rotary jet pump with stable operation of the present embodiment is used, by adopting the radial matching of the opposing double impellers of the first impeller 30 and the second impeller 40, when liquid enters the action range of the first impeller 30 from the liquid guiding tube 60, the second impeller 40 interposed simultaneously can force the liquid in the centrifugal cavity and the impeller to form synchronous rotation, so that the radial flowing pressure is more linear and uniform, and the friction loss of the liquid mixing medium to the disc body is reduced, the output efficiency is improved, and a certain axial eccentric force is counteracted.

Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (6)

1. The utility model provides a novel double-impeller rotary jet pump with stable operation, which is characterized in that, including inside pump body shell (10) that has centrifugal chamber, pump body shell (10) one side is through flange fixedly connected with cap (11), pump body shell (10) are located cap (11) opposite side fixedly connected with bearing box (20), a main shaft (21) that just connect through thrust bearing are worn to be equipped with to bearing box (20) outer end, simultaneously main shaft (21) inner extends to pump body shell (10) inboard, pump body shell (10) are located the outer end of cap (11) have liquid guide tube (60) that extend to pump body shell (10) inside centrifugal chamber, and the junction of liquid guide tube (60) and cap (11) has mechanical seal (61), pump body shell (10) inside centrifugal chamber has rotor subassembly, rotor subassembly is including setting up in pump body shell (10) inside first impeller (30) that are close to cap (11) one side, pump body shell (10) inside is close to bearing box (20) one side and the axle center department is connected with main shaft (21) inner second impeller (40), first impeller (40) and second impeller (40) are parallel, the outer diameter surfaces of the first impeller (30) and the second impeller (40) are fixedly connected with a mounting sleeve (50).

2. A novel stable-operation dual impeller rotary jet pump according to claim 1, wherein: the inner end of the liquid guide tube (60) is also communicated with a liquid discharge section which is positioned in the centrifugal cavity inside the pump body shell (10), and the liquid guide tube (60) is matched with the discharge section in a tongue-and-groove mode.

3. A novel stable-operation dual impeller rotary jet pump according to claim 1, wherein: the mechanical seal (61) is a cartridge type sealing mechanical shaft.

4. A novel stable-operation dual impeller rotary jet pump according to claim 1, wherein: the first impeller (30) is radially provided with a circle of first vanes (31) which are also fixed on one side facing the second impeller (40), and the axis of the first impeller (30) is also provided with a through hole (32) for penetrating a liquid guide tube (60).

5. A novel stable-operation dual impeller rotary jet pump according to claim 1, wherein: the second impeller (40) is radially provided with a circle of second blades (41) which are also fixed on one side facing the first impeller (30), and the axis of the second impeller (40) is provided with a spline positioning hole (42) connected with the inner end of the main shaft (21) through a key block.

6. A novel stable-operation dual impeller rotary jet pump according to claim 1, wherein: the outer end of the pump body shell (10) is also provided with a water inlet pipe (70) which is respectively communicated with the liquid guide pipe (60) and a water outlet pipe (71) which is communicated with the centrifugal cavity inside the pump body shell (10).