CN219691828U

CN219691828U - Rotary spraying pump structure

Info

Publication number: CN219691828U
Application number: CN202321257657.7U
Authority: CN
Inventors: 王东伟
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-09-15
Anticipated expiration: 2033-05-23

Abstract

The utility model belongs to the technical field of rotary jet pumps, and particularly relates to a rotary jet pump structure, which comprises: the shell rotating assembly is coaxially arranged in the shell housing assembly, and the page wheel and a plurality of blades are fixedly connected in the shell rotating assembly. In the utility model, the collecting pipe is connected with the inlet pipeline of the rotary jet pump into a whole, so that the effective flow cross section of the inlet pipeline is increased, the liquid flow speed is reduced, and the pressure is increased; the impeller is arranged at the left side of the rotary shell, and a buffer area is formed by extending the inlet of the impeller, so that the flow rate of liquid is further reduced, and the inlet pressure is improved; meanwhile, pressurizing holes are formed in each flow channel of the impeller corresponding to the front cover plate, and high-pressure liquid in the rotary cavity is introduced into a low-pressure area of the inlet of the vane, so that the cavitation performance of the rotary jet pump is improved, and the working range is expanded; the blade is arranged on the right side wall surface of the rotary shell and rotates along with the rotary shell, liquid in the rotary shell obtains larger circumferential velocity under the action of the blade, and the rotation of the blade reduces the left pressure of the mechanical seal to play a certain sealing role.

Description

Rotary spraying pump structure

Technical Field

The utility model belongs to the technical field of rotary jet pumps, and particularly relates to a rotary jet pump structure.

Background

At present, a collecting pipe of a single-stage rotary jet pump penetrates out of an inlet pipeline of the rotary jet pump and the center of an impeller, so that an effective flow passage at an inlet of the rotary jet pump is annular, and liquid enters the impeller through the annular passage. Under certain conditions of the flow of the rotary jet pump, the flow passage is reduced, so that the flow velocity at the inlet of the impeller is increased, and the cavitation performance of the inlet of the impeller is finally deteriorated, which is also one of the main reasons of poor cavitation performance of the known rotary jet pump. Meanwhile, according to the working principle of the rotary jet pump, liquid in the rotary cavity enters the inlet of the collecting pipe at a certain circumferential speed, so that the circumferential speed of the liquid in the rotary cavity has a great influence on the collecting pipe to collect the liquid. A single stage rotary jet pump introduces liquid into the rotary housing by a single impeller and imparts an initial circumferential velocity to the liquid. However, the liquid peripheral speed is smaller at the far end of the rotary shell far away from the impeller, and the rotary shell drives the liquid to rotate by virtue of friction force between the liquid and the shell, so that the effect is limited. There is therefore a need for a rotary jet pump structure.

Disclosure of Invention

The utility model aims to provide a rotary jet pump structure so as to solve the problems.

In order to achieve the above object, the present utility model provides the following solutions:

a rotary jet pump structure comprising: the pump shell assembly is coaxially provided with a rotary shell assembly, one side of the pump shell assembly is fixedly connected with a transmission assembly, the transmission assembly is in transmission connection with the rotary shell assembly, one side of the pump shell assembly, which is far away from the transmission assembly, is fixedly connected with an inlet pipeline, a collecting pipe is arranged in the inlet pipeline in a penetrating manner, one end of the collecting pipe extends into the rotary shell assembly and is communicated with the rotary shell assembly, the bottom end of the inlet pipeline is provided with a water inlet, and the rotary shell assembly is communicated with the water inlet;

an impeller is coaxially and fixedly connected in the rotary shell assembly, the impeller is close to the transmission assembly, the outer edge of the impeller is communicated with the inner cavity of the rotary shell assembly, and the axis of the impeller is communicated with the inlet pipeline;

the rotary shell assembly is internally and fixedly connected with a plurality of blades, the blades are circumferentially and equally arranged at intervals, and the blades are positioned on the side wall, opposite to the impeller, of the rotary shell assembly.

Preferably, the pump shell assembly comprises a first pump shell, a second pump shell is coaxially and fixedly connected with the first pump shell, a second cavity is formed between the second pump shell and the first pump shell, and the rotary shell assembly is coaxially and rotatably connected in the second cavity;

the first pump shell is fixedly connected with the transmission assembly coaxially, and the second pump shell is fixedly connected and communicated with the inlet pipeline.

Preferably, the shell rotating assembly comprises a first shell rotating assembly, the outer side wall of the first shell rotating assembly is in transmission connection with the transmission assembly, the impeller is coaxially fixedly connected to the inner side wall of the first shell rotating assembly, the first shell rotating assembly is coaxially fixedly connected with a second shell rotating assembly, a plurality of blades are fixedly connected to the inner side wall of the second shell rotating assembly opposite to the first shell rotating assembly, a first cavity is formed between the second shell rotating assembly and the first shell rotating assembly, and one end of the collecting pipe penetrates through the second shell rotating assembly and stretches into the first cavity.

Preferably, the transmission assembly comprises a suspension fixedly connected to the first pump shell, a pump shaft is coaxially and rotatably connected in the suspension, and one end of the pump shaft extends into the first pump shell and is coaxially and fixedly connected with the first rotary shell.

Preferably, a first connecting ring is coaxially fixedly connected to one side, far away from the first rotary shell, of the second rotary shell, a mechanical sealing moving ring is coaxially fixedly connected to the inner edge of the first connecting ring, a mechanical sealing stationary ring is in sliding contact with the mechanical sealing moving ring, the mechanical sealing stationary ring and the mechanical sealing moving ring are coaxially arranged, and the mechanical sealing stationary ring is fixedly connected in the inlet pipeline.

Preferably, a round hole is formed in the inner edge of the impeller, the round hole is communicated with the inner cavity of the impeller, the round hole is located on one side, away from the first rotary shell, of the impeller, a second connecting ring is arranged at the round hole, a mouth ring is slidably connected to the outer edge of the second connecting ring, the mouth ring and the second connecting ring are coaxially arranged, and the mouth ring and one end, extending into the first cavity, of the inlet pipeline are in sliding contact.

Preferably, the collecting pipe is far away from the coaxial rigid coupling of one end of second spiral shell has a fixed pipe, the fixed pipe with the collecting pipe intercommunication, the fixed pipe is close to the one end of collecting pipe has seted up first step, first step is located on the lateral wall of fixed pipe, set up on the inside wall of import pipeline with the second step of first step looks adaptation, first step with second step butt, the fixed pipe is kept away from the one end of collecting pipe wears out import pipeline, the fixed pipe wears out the one end threaded connection of import pipeline has a mounting nut, the external diameter of mounting nut is greater than the external diameter of import pipeline, the second step is located between the first step with the mounting nut.

Compared with the prior art, the utility model has the following advantages and technical effects:

1. in the utility model, the collecting pipe and the inlet pipeline of the rotary jet pump are connected into a whole, so that the effective flow cross section of the inlet pipeline is increased, the liquid flow speed is reduced, and the pressure is increased.

2. The impeller is arranged at the left side of the rotary shell, and a buffer area is formed by extending the inlet of the impeller, so that the flow rate of liquid is further reduced, and the inlet pressure is improved; meanwhile, pressurizing holes are formed in the channels of the impeller corresponding to the front cover plate, and high-pressure liquid in the rotary cavity is introduced into a low-pressure area of the inlet of the vane, so that the cavitation performance of the rotary jet pump is improved, and the working range is expanded.

3. The blade is arranged on the right side wall surface of the rotary shell and rotates along with the rotary shell, and the liquid in the rotary shell obtains larger circumferential velocity under the action of the blade.

4. The blade is arranged on the right side wall surface of the rotary shell and rotates along with the rotary shell, and the pressure of the lower part of the blade, which is close to the mechanical seal, is reduced under the rotation action of the blade, so that the reliability of the seal is improved.

Drawings

For a clearer description of an embodiment of the utility model or of the solutions of the prior art, the drawings that are needed in the embodiment will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art:

FIG. 1 is a schematic view of the internal structure of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at C;

FIG. 3 is a partial enlarged view at D in FIG. 1;

FIG. 4 is a cross-sectional view A-A of FIG. 1;

FIG. 5 is a front view of an impeller of the present utility model;

wherein, 1, a suspension; 2. a pump shaft; 3. a first rotary shell; 4. an impeller; 5. a second rotary shell; 6. a first pump housing; 7. collecting pipes; 8. a second pump housing; 9. a blade; 12. a first fixing pin; 13. a mechanical seal moving ring; 14. a mechanical seal stationary ring; 15. a second fixing pin; 16. an inlet line; 17. a seal ring; 19. installing a nut; 20. a first bolt; 21. a shell-rotating bolt; 22. a housing bolt; 23. a mouth ring; 24. a suspension bolt; 25. a drive bolt; 26. and a water inlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1 to 5, the present utility model discloses a structure of a rotary jet pump, comprising: the pump shell assembly is coaxially provided with a rotary shell assembly, one side of the pump shell assembly is fixedly connected with a transmission assembly, the transmission assembly is in transmission connection with the rotary shell assembly, one side of the pump shell assembly, which is far away from the transmission assembly, is fixedly connected and communicated with an inlet pipeline 16, a collecting pipe 7 is arranged in the inlet pipeline 16 in a penetrating way, one end of the collecting pipe 7 extends into the rotary shell assembly and is communicated with the rotary shell assembly, the bottom end of the inlet pipeline 16 is provided with a water inlet 26, and the rotary shell assembly is communicated with the water inlet 26;

an impeller 4 is coaxially and fixedly connected in the rotary shell assembly, the impeller 4 is close to the transmission assembly, the outer edge of the impeller 4 is communicated with the inner cavity of the rotary shell assembly, and the axis of the impeller 4 is communicated with an inlet pipeline 16;

a plurality of blades 9 are fixedly connected in the rotary shell assembly, the blades 9 are circumferentially arranged at equal intervals, and the blades 9 are positioned on the side wall, opposite to the impeller 4, in the rotary shell assembly.

When the device is used, the power assembly and an external power mechanism are preferably motors (not shown in the figure), the power assembly drives the rotary shell assembly to rotate in the pump shell assembly, the rotary shell assembly drives the impeller 4 to rotate, the impeller 4 rotates to generate centrifugal force, a negative pressure environment is formed at the center of the impeller 4, liquid is sucked into the impeller 4 through the water inlet 26, and then the liquid enters the rotary shell assembly through a cavity in the impeller 4;

the shell rotating assembly is internally provided with a plurality of blades 9, and the blades 9 rotate along with the shell rotating assembly, so that liquid in the shell rotating assembly is driven to rotate, and the liquid in the shell rotating assembly obtains larger circumferential velocity.

The collecting pipe 7 is arranged as an L-shaped pipeline, the short end penetrates into the rotary shell assembly and is vertically arranged, a water inlet is formed in the side wall of the short end, and liquid in the rotary shell assembly enters the collecting pipe 7 through the water inlet; the long and short pipelines are arranged in the inlet pipeline 16 in a penetrating way and penetrate out of the inlet pipeline 16 to enable liquid to flow out.

Wherein the blade 9 is an arc-shaped blade.

In the device, the collecting pipe 7 is arranged in the inlet pipeline 16 in a penetrating way and is integrally arranged with the inlet pipeline 16, so that the effective flow cross section of the inlet pipeline 16 is increased, the liquid flow speed is reduced, and the pressure is increased.

In a further optimized scheme, the pump shell assembly comprises a first pump shell 6, a second pump shell 8 is coaxially and fixedly connected to the first pump shell 6, a second cavity is formed between the second pump shell 8 and the first pump shell 6, and the rotary shell assembly is coaxially and rotatably connected in the second cavity;

the first pump shell 6 is fixedly connected with the transmission assembly coaxially, and the second pump shell 8 is fixedly connected and communicated with the inlet pipeline 16. The second pump housing 8 is fixedly connected with the inlet pipeline 16 through a plurality of first bolts 20.

The outer edges of the second pump shell 8 and the first pump shell 6 are fixedly connected with first flanges, the two first flanges are coaxially arranged and attached, the two first flanges are fixedly connected through a plurality of shell bolts 22, and the shell bolts 22 are circumferentially arranged at equal intervals.

Further optimizing scheme, revolve shell subassembly and including first shell 3 soon, the lateral wall and the transmission subassembly transmission of first shell 3 soon are connected, the coaxial rigid coupling of impeller 4 is on the inside wall of first shell 3 soon, the coaxial rigid coupling of first shell 3 soon has second shell 5 soon, a plurality of blade 9 all rigid couplings are on the inside wall that second shell 5 soon and first shell 3 just face soon, form first cavity between second shell 5 and the first shell 3 soon, the one end of collecting main 7 passes second shell 5 soon and stretches into in the first cavity.

The impeller 4 comprises a cover plate coaxially fixedly connected with the bottom of the first rotary shell 3, six through holes are coaxially formed in the center of the cover plate, six arc-shaped supercharging blades are fixedly connected between the cover plate and the bottom of the first rotary shell 3, the six arc-shaped supercharging blades are circumferentially arranged at equal intervals, inlets of the arc-shaped supercharging blades extend into the through holes to form supercharging holes, when the impeller 4 rotates, the six arc-shaped supercharging blades rotate, high-pressure liquid is introduced into the rotary cavity, high-pressure liquid in the rotary cavity flows back to the inlets of the supercharging blades through the six through holes, the pressure at the position is improved, and the effects of improving cavitation performance of the rotary jet pump and expanding the working range are achieved.

The first shell 3 and the second shell 5 are arranged oppositely, the second flanges are fixedly connected to the openings of the first shell 3 and the second shell 5, the two second flanges are fixedly connected through a plurality of shell-rotating bolts 21, and the shell-rotating bolts 21 are circumferentially arranged at equal intervals. The second spiral shell 5 is close to the one side of import pipeline 16 and has seted up the via hole, and import pipeline 16 wears to establish in the via hole and communicates with first cavity.

In a further optimized scheme, the transmission assembly comprises a suspension 1 fixedly connected to a first pump shell 6, a pump shaft 2 is coaxially and rotatably connected in the suspension 1, and one end of the pump shaft 2 extends into the first pump shell 6 and is coaxially and fixedly connected with a first rotary shell 3.

The pump shaft 2 is coaxially and rotatably connected in the suspension 1, the suspension 1 is fixedly connected with the first pump shell 6 through a plurality of suspension bolts 24 which are circumferentially and equally spaced, one end of the pump shaft 2 penetrates out of the suspension 1 and is in transmission connection with an external power mechanism, the other end of the pump shaft 2 penetrates into the first pump shell 6 and is coaxially and fixedly connected with the first rotary shell 3 through a transmission bolt 25, and the external power mechanism drives the first rotary shell 3 and the second rotary shell 5 to rotate through the pump shaft 2.

In a further optimized scheme, a first connecting ring is coaxially and fixedly connected to one side, far away from the first rotary shell 3, of the second rotary shell 5, a mechanical seal moving ring 13 is coaxially and fixedly connected to the inner edge of the first connecting ring, a mechanical seal moving ring 13 is in sliding contact with a mechanical seal stationary ring 14, the mechanical seal stationary ring 14 and the mechanical seal moving ring 13 are coaxially arranged, and the mechanical seal stationary ring 14 is fixedly connected in an inlet pipeline 16.

The mechanical seal moving ring 13 is coaxially arranged at the inner edge of the first connecting ring, the outer edge of the mechanical seal moving ring 13 is matched with the inner edge of the first connecting ring, and the mechanical seal moving ring 13 is fixed through a first fixing pin 12; thereby the mechanical seal moving ring 13 rotates along with the second rotary shell 5;

the mechanical seal stationary ring 14 is sleeved at one end of the inlet pipeline 16 extending into the second pump shell 8, the mechanical seal stationary ring 14 and the inlet pipeline 16 are fixed through the second fixing pin 15, and the mechanical seal stationary ring 14 and the mechanical seal movable ring 13 are coaxially arranged and are in sliding contact, so that the second rotary shell 5 and the inlet pipeline 16 are sealed.

Further optimizing scheme, the round hole has been seted up to the inner edge department of impeller 4, and the round hole communicates with the inner chamber of impeller 4, and the round hole is located the one side that impeller 4 kept away from first shell 3 soon, and round hole department is provided with the second go-between, and the outer fringe department sliding connection of second go-between has a mouth ring 23, and a mouth ring 23 and the coaxial setting of second go-between, a mouth ring 23 and the one end sliding contact of import pipeline 16 stretching into in the first cavity.

The round hole is formed in the cover plate of the first rotary shell 3 in the hospital, and the round hole and the cover plate are coaxially arranged; the second connecting ring is communicated with one end of the inlet pipeline 16 extending into the first cavity through the opening ring 23, and when the impeller 4 rotates, liquid enters the impeller 4 through the round hole and then enters the rotary shell assembly under the action of centrifugal force.

Further optimizing scheme, the coaxial rigid coupling of one end that the second revolved shell 5 was kept away from to the pressure manifold 7 has the fixed pipe, fixed pipe and pressure manifold 7 intercommunication, first step has been seted up to the one end that the fixed pipe is close to pressure manifold 7, first step is located the lateral wall of fixed pipe, set up the second step with first step looks adaptation on the inside wall of import pipeline 16, first step and second step butt, the import pipeline 16 is worn out to the one end that the pressure manifold 7 was kept away from to the fixed pipe, the one end threaded connection that the import pipeline 16 was worn out to the fixed pipe has installation nut 19, the external diameter of installation nut 19 is greater than the external diameter of import pipeline 16, the second step is located between first step and the installation nut 19.

The collecting pipe 7 and the inlet pipeline 16 are fixed through the mounting nut 19, and meanwhile, a sealing ring 17 is arranged between the outer side wall of the collecting pipe 7 and the inner side wall of the inlet pipeline 16 to strengthen sealing, so that liquid/pressure leakage is avoided.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims

1. A rotary jetting pump structure, comprising: the novel rotary shell type hydraulic pump comprises a pump shell assembly, wherein a rotary shell assembly is coaxially arranged in the pump shell assembly, a transmission assembly is fixedly connected to one side of the pump shell assembly, the transmission assembly is in transmission connection with the rotary shell assembly, one side of the pump shell assembly, which is far away from the transmission assembly, is fixedly connected and communicated with an inlet pipeline (16), a collecting pipe (7) is arranged in the inlet pipeline (16) in a penetrating manner, one end of the collecting pipe (7) extends into the rotary shell assembly and is communicated with the rotary shell assembly, a water inlet (26) is formed in the bottom end of the inlet pipeline (16), and the rotary shell assembly is communicated with the water inlet (26);

an impeller (4) is coaxially and fixedly connected in the rotary shell assembly, the impeller (4) is close to the transmission assembly, the outer edge of the impeller (4) is communicated with the inner cavity of the rotary shell assembly, and the axis of the impeller (4) is communicated with the inlet pipeline (16);

a plurality of blades (9) are fixedly connected in the rotary shell assembly, the blades (9) are circumferentially arranged at equal intervals, and the blades (9) are positioned on the side wall, opposite to the impeller (4), in the rotary shell assembly.

2. A rotary jetting pump structure according to claim 1, wherein: the pump shell assembly comprises a first pump shell (6), the first pump shell (6) is coaxially and fixedly connected with a second pump shell (8), a second cavity is formed between the second pump shell (8) and the first pump shell (6), and the rotary shell assembly is coaxially and rotatably connected in the second cavity;

the first pump shell (6) is fixedly connected with the transmission assembly coaxially, and the second pump shell (8) is fixedly connected and communicated with the inlet pipeline (16).

3. A rotary jetting pump structure according to claim 2, wherein: the shell assembly is soon including first shell (3) soon, the lateral wall that first shell (3) soon with transmission assembly transmission is connected, impeller (4) coaxial rigid coupling is in on the inside wall that first shell (3) soon, first shell (3) soon coaxial rigid coupling has second shell (5) soon, a plurality of blade (9) all rigid coupling be in second shell (5) soon with first shell (3) soon just on the inside wall, second shell (5) soon with first shell (3) soon between form first cavity, the one end of pressure manifold (7) is passed second shell (5) soon and stretches into in the first cavity.

4. A rotary jetting pump structure according to claim 3, wherein: the transmission assembly comprises a suspension (1) fixedly connected to the first pump shell (6), a pump shaft (2) is coaxially and rotatably connected in the suspension (1), and one end of the pump shaft (2) extends into the first pump shell (6) and is coaxially and fixedly connected with the first rotary shell (3).

5. A rotary jetting pump structure according to claim 3, wherein: the second shell (5) is kept away from the coaxial rigid coupling of one side of first shell (3) has first go-between, the coaxial rigid coupling of inner edge department of first go-between has mechanical seal moving ring (13), mechanical seal moving ring (13) sliding contact has mechanical seal quiet ring (14), mechanical seal quiet ring (14) with mechanical seal moving ring (13) coaxial setting, mechanical seal quiet ring (14) rigid coupling is in inlet pipeline (16).

6. A rotary jetting pump structure according to claim 3, wherein: the inner edge of impeller (4) has seted up the round hole, the round hole with the inner chamber intercommunication of impeller (4), the round hole is located impeller (4) are kept away from one side of first shell (3) soon, round hole department is provided with the second go-between, the outer fringe department sliding connection of second go-between has mouth ring (23), mouth ring (23) with the coaxial setting of second go-between, mouth ring (23) with inlet pipeline (16) stretch into one end sliding contact in the first cavity.

7. A rotary jetting pump structure according to claim 3, wherein: the utility model discloses a collecting pipe, including first spiral shell (5) and second spiral shell, collecting pipe (7) are kept away from the coaxial rigid coupling of one end of second spiral shell (5) has fixed pipe, fixed pipe with collecting pipe (7) intercommunication, fixed pipe is close to the one end of collecting pipe (7) has seted up first step, first step is located on the lateral wall of fixed pipe, set up on the inside wall of import pipeline (16) with the second step of first step looks adaptation, first step with second step butt, fixed pipe is kept away from one end of collecting pipe (7) is worn out import pipeline (16), fixed pipe is worn out one end threaded connection of import pipeline (16) has installation nut (19), the external diameter of installation nut (19) is greater than the external diameter of import pipeline (16), the second step is located between first step with installation nut (19).