Flow guide structure of rotary jet pump and rotary jet pump with flow guide structure

By designing the flow guide structure of the rotary spray pump in the rotary spray pump, the steady flow part and arc-shaped flow channel are used to guide the liquid into the annular chamber, and the flow field disorder and energy loss caused by the difference in the flow direction of the liquid in the prior art is solved. , improves the binding force and energy transfer efficiency of the rotating fluid.

CN222208395UActive Publication Date: 2024-12-20LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202420957786.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-06
Publication Date
2024-12-20
Estimated Expiration
2034-05-06

AI Technical Summary

Technical Problem

In the existing single-stage rotary jet pump structure, the difference in the flow direction between the impeller and the rotor chamber leads to a disorder of the flow field, causing energy loss, and the liquid below the inlet of the collector cannot flow in effectively, consuming additional energy.

Method used

A rotary jet pump flow guide structure is designed, including a steady flow part and a pressure bearing plate. The flow guide channel is arranged at equal intervals along the circumference of the pressure bearing plate, and the guide plate guides the liquid to flow into the rotor cavity close to the rotation direction. , forming an annular chamber to reduce liquid impact and flow field disorders.

Benefits of technology

The liquid flow field in the rotor cavity is improved, hydraulic loss is reduced, the binding force and energy transfer efficiency of the rotating fluid are improved, and the liquid power loss inside the steady flow part is avoided.

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Abstract

The utility model belongs to the technical field of pump structure design, and particularly relates to a rotary jet pump flow guide structure and a rotary jet pump thereof.The rotary jet pump flow guide structure comprises a flow stabilizing part, a pressure bearing plate is fixedly arranged at one end of the flow stabilizing part, a plurality of flow guide channels are arranged on the side, away from the flow stabilizing part, of the pressure bearing plate, the pressure bearing plate is of a circular structure, and the flow guide channels are communicated with the flow stabilizing part. The multiple flow guide channels are arranged in the circumferential direction of the bearing plate at equal intervals, each flow guide channel is of an arc-shaped structure, and an opening in the end, close to the axis of the bearing plate, of each flow guide channel is smaller than an opening in the other end of each flow guide channel. The flow guide channels guide liquid to flow into the rotor cavity in the direction closer to the flowing direction of rotating liquid in the rotor cavity, impact between the liquid and the liquid in the rotor cavity is avoided, the flow field of the liquid in the rotor cavity is improved, and hydraulic loss is reduced. When the structure is applied to the rotary jet pump, the working efficiency of the rotary jet pump can be improved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of pump structure design, and particularly relates to a rotary jet pump flow guide structure and a rotary jet pump thereof. Background Art

[0002] At present, the known single-stage rotary jet pump structure is mainly composed of an impeller, a manifold and a rotor cavity, wherein the impeller is fixedly connected to the inner wall of the rotor cavity and rotates with the rotor cavity, and the manifold passes through the inlet pipeline of the rotary jet pump and the center of the impeller. The known single-stage rotary jet pump introduces liquid into the rotor cavity by a single impeller. According to the working principle of the rotary jet pump, the liquid in the rotor cavity enters the manifold inlet at a certain circumferential speed. Therefore, the liquid velocity direction in the rotor cavity has a greater influence on the liquid collected by the manifold, but the liquid flowing out of the impeller is in a free outflow state, and its flow direction is different from the flow direction of the liquid in the rotor cavity. The mixing of two liquids with different flow directions will inevitably lead to flow field turbulence, resulting in energy loss. At the same time, the liquid in the area below the manifold inlet to the rotor center axis cannot flow into the manifold, but still rotates at a certain circumferential speed, has a certain kinetic energy, and consumes energy. Utility Model Content

[0003] The utility model aims to provide a flow guide structure of a rotary jet pump and a rotary jet pump thereof, so as to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides a rotary jet pump guide structure, including a flow stabilizing portion, a pressure plate is fixedly arranged at one end of the flow stabilizing portion, a plurality of guide channels are arranged on the side of the pressure plate away from the flow stabilizing portion, the pressure plate is a circular structure, a plurality of guide channels are arranged at equal intervals along the circumference of the pressure plate, and the guide channels are an arc-shaped structure, and the opening of the guide channel at one end close to the axis of the pressure plate is smaller than the opening at the other end of the guide channel.

[0005] Preferably, the flow stabilizing portion includes a circular ring coaxially fixedly connected to the side of the pressure plate away from the guide channel, and a blocking plate is coaxially fixedly connected to the side of the circular ring away from the pressure plate. The blocking plate is a circular structure, and the diameter of the blocking plate is equal to the diameter of the circular ring.

[0006] Preferably, the circular ring is provided with a second opening, the middle of the blocking plate is provided with a circular hole, the blocking plate is provided with an opening one along the circumferential direction, and the circular hole is connected with the second opening through the opening one.

[0007] Preferably, a groove is provided on a side of the pressure plate away from the flow stabilizing portion, the groove is a circular structure, and one end of the flow guide channel close to the axis of the pressure plate is flush with and connected to the edge of the groove.

[0008] Preferably, the guide channel includes a plurality of guide vanes arranged at equal intervals along the circumference of the pressure plate, the guide vanes are arc-shaped structures, and two adjacent guide vanes and the pressure plate constitute a guide channel, the two ends of the guide vanes are distributed on two unequal circles, one end of the guide vane is flush with the edge of the groove, and the other end of the guide vane extends radially outward.

[0009] Preferably, the tangent angle between one end of the guide plate close to the axis of the pressure plate and the pressure plate is 12°-15°; the tangent angle between the other end of the guide plate and the pressure plate is 22°-25°.

[0010] Preferably, the utility model provides a rotary jet pump, which uses the above-mentioned rotary jet pump guide structure.

[0011] Preferably, the rotary jet pump includes a pump casing, a pump shaft is rotatably connected to the pump casing, one end of the pump shaft is coaxially fixedly connected to a rotor cavity, an impeller is coaxially fixedly connected to the inner wall of the rotor cavity, a liquid inlet channel is arranged between the impeller and the inner wall of the rotor cavity, the liquid inlet channel is communicated with the liquid inlet on the pump casing, a collecting pipe is arranged in the rotor cavity, the liquid outlet end of the collecting pipe passes through the inner wall of the rotor cavity and is fixedly mounted on the pump casing, the horizontal section of the collecting pipe is coaxially arranged with the rotor cavity and is provided with a gap, the pressure plate is fixedly sleeved on the horizontal section of the collecting pipe, the guide channel is arranged corresponding to the impeller, and a gap is provided between the guide channel and the impeller, the liquid inlet end of the collecting pipe extends out of the circular ring through the second opening, and a gap is provided between the circular ring and the inner wall of the rotor cavity.

[0012] Compared with the prior art, the utility model has the following advantages and technical effects:

[0013] The utility model provides a flow guide structure for a rotary jet pump. After the liquid is pressurized by an impeller, it is guided by a flow guide channel to flow into the rotor cavity in a direction closer to the flow direction of the rotating liquid in the rotor cavity, thereby avoiding collision with the liquid in the rotor cavity, improving the flow field of the liquid in the rotor cavity, and reducing hydraulic losses.

[0014] The interior of the rotor cavity is divided into annular chambers by a flow stabilizing portion, and the liquid inlet of the collecting pipe extends out of the flow stabilizing portion. The liquid in the annular chamber rotates at a certain circumferential speed under the rotation effect of the vortex cavity and flows into the pump from the liquid inlet of the collecting pipe. Compared with conventional rotary jet pumps, the rotation of the rotor cavity only needs to drive the liquid in the annular chamber to rotate, and there is no need to drive the entire liquid inside the rotor cavity to rotate, so the constraint force on the rotating fluid is stronger and the energy transfer efficiency is higher.

[0015] The liquid inside the flow stabilizing portion is not affected by the rotation effect of the rotor cavity 12, but is in a static state without power loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0017] Figure 1 This is a structural schematic diagram of a rotary jet pump guide structure proposed by the utility model;

[0018] Figure 2 This is a structural schematic diagram of another perspective of a rotary jet pump guide structure proposed by the utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the flow guide structure proposed by the utility model applied to a rotary jet pump;

[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the section at AA in the middle;

[0021] Among them: 1. blocking plate; 2. opening one; 3. pressure plate; 4. flow guide channel; 5. guide vane; 6. through hole; 7. groove; 8. impeller; 9. collecting pipe; 10. pump shaft; 11. pump casing; 12. rotor cavity; 13. circular ring; 14. opening two; 15. circular hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Embodiment 1:

[0025] Reference Figure 1 to Figure 2 As shown, the utility model provides a rotary jet pump guide structure, including a flow stabilizing portion, a pressure plate 3 is fixedly provided at one end of the flow stabilizing portion, a plurality of guide channels 4 are provided on the side of the pressure plate 3 away from the flow stabilizing portion, the pressure plate 3 is a circular structure, the plurality of guide channels 4 are arranged at equal intervals along the circumference of the pressure plate 3, and the guide channels 4 are an arc-shaped structure, and the opening of the guide channel 4 at one end close to the axis of the pressure plate 3 is smaller than the opening at the other end of the guide channel 4.

[0026] Furthermore, the flow stabilizing portion includes a circular ring 13 coaxially fixedly connected to the side of the pressure plate 3 away from the guide channel 4, and a blocking plate 1 is coaxially fixedly connected to the side of the circular ring 13 away from the pressure plate 3. The blocking plate 1 is a circular structure, and the diameter of the blocking plate 1 is equal to the diameter of the circular ring 13.

[0027] The circular ring 13, the blocking plate 1 and the pressure plate 3 form a closed shell, which can divide the interior of the rotor cavity 12 into annular chambers, thereby reducing the flow range of the liquid in the rotor cavity 12 and reducing energy loss.

[0028] Furthermore, a second opening 14 is provided on the circular ring 13 , a circular hole 15 is provided in the middle of the blocking plate 1 , an opening 1 2 is provided on the blocking plate 1 along the circumferential direction, and the circular hole 15 is connected with the second opening 14 through the opening 1 2 .

[0029] The circular hole 15, the opening 1 2 and the opening 2 14 form a continuous opening, so that the collecting pipe 9 can be accommodated in the shell and a step of liquid can be buffered.

[0030] Furthermore, a groove 7 is provided on one side of the pressure plate 3 away from the flow stabilizing portion. The groove 7 is a circular structure. One end of the flow guide channel 4 close to the axis of the pressure plate 3 is flush with the edge of the groove 7 and is connected.

[0031] Furthermore, the guide channel 4 includes a plurality of guide vanes 5 arranged at equal intervals along the circumference of the pressure plate 3, the guide vanes 5 are of an arc-shaped structure, and two adjacent guide vanes 5 and the pressure plate 3 form a guide channel 4, the two ends of the guide vanes 5 are distributed on two unequal circles, one end of the guide vane 5 is flush with the edge of the groove 7, and the other end of the guide vane 5 extends radially outward.

[0032] The guide vane 5 can guide the liquid pressurized by the impeller 8 to flow into the annular chamber in a directional manner and make a rotational motion, and finally enter the liquid inlet of the collecting pipe 9.

[0033] Furthermore, the tangent angle between the end of the guide vane 5 close to the axis of the pressure plate 3 and the pressure plate 3 is 12°-15°; the tangent angle between the other end of the guide vane 5 and the pressure plate 3 is 22°-25°.

[0034] Embodiment 2:

[0035] Reference Figure 3 to Figure 4 The utility model provides a rotary jet pump, which uses the rotary jet pump guide structure.

[0036] Furthermore, it includes a pump casing 11, on which a pump shaft 10 is rotatably connected, one end of the pump shaft 10 is coaxially fixedly connected to a rotor cavity 12, an impeller 8 is coaxially fixedly connected to the inner wall of the rotor cavity 12, a liquid inlet channel is provided between the impeller 8 and the inner wall of the rotor cavity 12, the liquid inlet channel is communicated with the liquid inlet on the pump casing 11, a collecting pipe 9 is provided in the rotor cavity 12, the liquid outlet end of the collecting pipe 9 passes through the inner wall of the rotor cavity 12 and is fixedly installed on the pump casing 11, the horizontal section of the collecting pipe 9 is coaxially arranged with the rotor cavity 12 and is provided with a gap, the pressure plate 3 is fixedly sleeved on the horizontal section of the collecting pipe 9, the guide channel 4 is correspondingly arranged with the impeller 8, and a gap is provided between the guide channel 4 and the impeller 8, the liquid inlet end of the collecting pipe 9 extends out of the ring 13 through the opening 2 14, and a gap is provided between the ring 13 and the inner wall of the rotor cavity 12.

[0037] After being pressurized by the impeller 8, the liquid is guided by the flow guide 4 to flow into the rotor chamber 12 in a direction closer to the flow direction of the rotating liquid in the rotor chamber 12, avoiding collision with the liquid in the rotor chamber 12, improving the flow field of the liquid in the rotor chamber 12, and reducing hydraulic losses.

[0038] The interior of the rotor cavity 12 is divided into an annular chamber by the provided flow stabilizing portion, and the liquid inlet of the collecting pipe 9 extends out of the flow stabilizing portion. The liquid in the annular chamber rotates at a certain circumferential speed under the rotation effect of the vortex cavity, and flows into the liquid from the liquid inlet of the collecting pipe 9. Compared with the conventional rotary jet pump, the rotation of the rotor cavity 12 only needs to drive the liquid in the annular chamber to rotate, and there is no need to drive the entire rotor cavity 12 to rotate the liquid, so the constraint force on the rotating fluid is stronger and the energy transfer efficiency is higher.

[0039] The liquid inside the flow stabilizing portion is not affected by the rotation effect of the rotor cavity 12, but is in a static state without power loss.

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A flow guide structure of a rotary jet pump, characterized in that: It comprises a flow stabilizing portion, a pressure plate (3) is fixedly arranged at one end of the flow stabilizing portion, a plurality of flow guide channels (4) are arranged on the side of the pressure plate (3) away from the flow stabilizing portion, the pressure plate (3) is a circular structure, a plurality of flow guide channels (4) are arranged at equal intervals along the circumference of the pressure plate (3), and the flow guide channels (4) are an arc-shaped structure, and an opening of one end of the flow guide channel (4) close to the axis of the pressure plate (3) is smaller than an opening of the other end of the flow guide channel (4).

2. The flow guide structure of the rotary jet pump according to claim 1, characterized in that: The flow stabilizing portion comprises a circular ring (13) coaxially fixedly connected to a side of the pressure plate (3) away from the flow guide channel (4); a blocking plate (1) is coaxially fixedly connected to the side of the circular ring (13) away from the pressure plate (3); the blocking plate (1) is a circular structure; and the diameter of the blocking plate (1) is equal to the diameter of the circular ring (13).

3. The flow guide structure of the rotary jet pump according to claim 2, characterized in that: The circular ring (13) is provided with a second opening (14), the middle of the blocking plate (1) is provided with a circular hole (15), the blocking plate (1) is provided with an opening (2) along the circumferential direction, and the circular hole (15) is connected to the second opening (14) through the opening (2).

4. The flow guide structure of the rotary jet pump according to claim 1, characterized in that: A groove (7) is provided on a side of the pressure plate (3) away from the flow stabilizing portion, the groove (7) being a circular structure, and an end of the flow guide channel (4) close to the axis of the pressure plate (3) is flush with and connected to the edge of the groove (7).

5. The flow guide structure of the rotary jet pump according to claim 4, characterized in that: The guide channel (4) comprises a plurality of guide plates (5) arranged at equal intervals along the circumference of the pressure plate (3); the guide plates (5) are arc-shaped structures, and two adjacent guide plates (5) and the pressure plate (3) form a guide channel (4); the two ends of the guide plates (5) are distributed on two unequal circumferences, one end of the guide plates (5) is flush with the edge of the groove (7), and the other end of the guide plates (5) extends radially outward.

6. The flow guide structure of the rotary jet pump according to claim 5, characterized in that: The tangent angle between the end of the guide plate (5) close to the axis of the pressure plate (3) and the pressure plate (3) is 12°-15°; the tangent angle between the other end of the guide plate (5) and the pressure plate (3) is 22°-25°.

7. A rotary jet pump, characterized in that: Use the rotary jet pump guide structure according to any one of claims 1 to 6.

8. The rotary jet pump according to claim 7, characterized in that: The invention comprises a pump housing (11), a pump shaft (10) being rotatably connected to the pump housing (11), one end of the pump shaft (10) being coaxially fixedly connected to a rotor chamber (12), an impeller (8) being coaxially fixedly connected to the inner wall of the rotor chamber (12), a liquid inlet channel being arranged between the impeller (8) and the inner wall of the rotor chamber (12), the liquid inlet channel being communicated with a liquid inlet port on the pump housing (11), a collecting pipe (9) being arranged in the rotor chamber (12), the liquid outlet end of the collecting pipe (9) passing through the rotor chamber (12) and the liquid outlet end of the collecting pipe (9) passing through the rotor chamber (12). The inner wall of the chamber (12) is fixedly mounted on the pump housing (11); the horizontal section of the collecting pipe (9) is coaxially arranged with the rotor chamber (12) and is provided with a gap; the pressure plate (3) is fixedly sleeved on the horizontal section of the collecting pipe (9); the flow guide channel (4) is correspondingly arranged with the impeller (8), and a gap is provided between the flow guide channel (4) and the impeller (8); the liquid inlet end of the collecting pipe (9) extends out of the flow stabilizing portion, and a gap is provided between the flow stabilizing portion and the inner wall of the rotor chamber (12).