High-rotating-speed rotary injection pump
By installing a spiral groove on the pump shaft of the jet pump, using threaded pitot tubes and opening a trapezoidal groove on the impeller, the traditional jet pump has poor suction capacity, insufficient cavitation performance and short service life, and more efficient fluid delivery and longer service life are achieved.
Patent Information
- Application Number
- CN202422030815.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The suction capacity of traditional jet pumps is poor, lacks cavitation performance, and is inconvenient to replace suction ends of different specifications. The flow rate and head of the pump cannot be changed. At the same time, the weight of the rotor parts is heavier, resulting in an increase in the shaft load and affecting the service life.
A high-speed rotary jet pump is designed, which increases suction capacity and cavitation resistance by installing a spiral groove in the pump shaft; it is threaded connection of the pitot tube to facilitate replacement of the suction end and change the flow rate and head; it is opened on the impeller to reduce the weight of the rotor parts and reduce the bearing load.
It improves the suction capacity and cavitation resistance of the injection pump, facilitates replacement of the suction end to adjust flow and head, and extends the service life of the pump.
Smart Images
Figure CN222936936U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of jet pumps, in particular to a high-speed rotating jet pump. Background Art
[0002] A rotating jet pump is a general mechanical equipment for transporting fluids. The impeller of a rotating jet pump is one of the most core components. Therefore, the design and manufacture of the impeller directly affect the efficiency and head of the pump.
[0003] However, the traditional jet pump has poor suction capacity, lacks cavitation performance, and the existing jet pump is not convenient for replacing the suction ends of different specifications, so it is impossible to change the flow rate and head of the pump. In addition, the rotor components of the existing jet pump are relatively heavy, which leads to an increase in the load on the shaft body, thus affecting the service life of the pump. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problems existing in the prior art that the traditional jet pump has poor suction capacity, lacks cavitation performance, and the existing jet pump is not convenient for replacing the suction ends of different specifications, so it is impossible to change the flow rate and head of the pump. In addition, the rotor components of the existing jet pump are relatively heavy, which leads to an increase in the load on the shaft body, thus affecting the service life of the pump, and a high-speed rotating jet pump is proposed.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a high-speed rotating jet pump, including a pump body, a rotor cavity is arranged inside the pump body, an impeller assembly is connected to one side of the rotor cavity, a pump shaft two is connected to the other side of the rotor cavity, a pump shaft one is connected to one side of the impeller assembly, and a pitot tube is arranged inside the rotor cavity;
[0006] The pump shaft one further includes a shaft body, and a spiral groove is arranged inside the shaft body;
[0007] The pitot tube further includes a suction end and a discharge end, and the suction end and the discharge end are threadedly connected;
[0008] The impeller assembly further includes an impeller, and a plurality of flow channels are arranged inside the impeller, and trapezoidal grooves are arranged between adjacent two of the flow channels.
[0009] Preferably, a water outlet end cover is installed at one end of the pump body, and a water inlet end cover is installed at the other end of the pump body.
[0010] Preferably, bearings are installed inside the pump shaft two and the pump shaft one, and the bearings are installed inside the pump body.
[0011] Preferably, a mechanical seal two and a mechanical seal one are respectively installed on both sides of the pump body.
[0012] Preferably, a runner is installed on the outer side of the first pump shaft.
[0013] Preferably, a nut is provided at one end of the pump body.
[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.
[0015] 1. In the present utility model, by providing spiral grooves in the first pump shaft, the suction capacity of the pump is increased, and the cavitation resistance performance is improved.
[0016] 2. In the present utility model, by connecting the pitot tube through threads, it is convenient to replace suction ends of different specifications, and it is convenient to change the flow rate and head of the pump.
[0017] 3. In the present utility model, by providing trapezoidal grooves on the impeller, the weight of the rotor component is reduced, the bearing load force is decreased, and its service life is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 FIG. is a schematic cross-sectional structure view of a high-speed rotating jet pump proposed by the present utility model;
[0019] Figure 2 FIG. is a schematic pump shaft structure view of a high-speed rotating jet pump proposed by the present utility model;
[0020] Figure 3 FIG. is a schematic pitot tube structure view of a high-speed rotating jet pump proposed by the present utility model;
[0021] Figure 4 FIG. is a schematic pitot tube structure view of another angle of a high-speed rotating jet pump proposed by the present utility model;
[0022] Figure 5 FIG. is a schematic impeller assembly structure view of a high-speed rotating jet pump proposed by the present utility model;
[0023] Figure 6 FIG. is a schematic impeller assembly structure view of another angle of a high-speed rotating jet pump proposed by the present utility model.
[0024] Legend: 1. Nut; 2. Outlet end cover; 3. Mechanical seal II; 4. Pump body; 5. Second pump shaft; 6. Rotor cavity; 7. Pitot tube; 701. Suction end; 702. Discharge end; 8. Impeller assembly; 801. Impeller; 802. Flow channel; 803. Trapezoidal groove; 9. Runner; 10. First pump shaft; 1001. Shaft body; 1002. Spiral groove; 11. Mechanical seal I; 12. Inlet end cover. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] To better understand the above objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
[0026] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.
[0027] Embodiment 1: As Figures 1-6 shown, the present utility model provides a technical solution: a high-speed rotary jet pump, including a pump body 4, a rotor cavity 6 is provided inside the pump body 4, an impeller assembly 8 is connected to one side of the rotor cavity 6, a second pump shaft 5 is connected to the other side of the rotor cavity 6, a first pump shaft 10 is connected to one side of the impeller assembly 8, and a pitot tube 7 is arranged inside the rotor cavity 6; the first pump shaft 10 further includes a shaft body 1001, and a spiral groove 1002 is provided inside the shaft body 1001; the pitot tube 7 further includes a suction end 701 and a discharge end 702, and the suction end 701 and the discharge end 702 are threadedly connected; the impeller assembly 8 further includes an impeller 801, and a plurality of flow channels 802 are provided inside the impeller 801, and trapezoidal grooves 803 are provided between adjacent two flow channels 802.
[0028] In this embodiment, the rotor cavity 6 facilitates providing an installation space for the rotor. The impeller assembly 8 cooperates with the impeller 801 and is connected to the first pump shaft 10 to form the function of fluid transportation. The second pump shaft 5 further cooperates to provide the function of rotation. The spiral groove 1002 facilitates the transportation of fluid, which is beneficial to increasing the suction capacity of the pump and improving the anti-cavitation performance. The threaded connection of the pitot tube 7 facilitates the replacement of suction ends of different specifications and is convenient for changing the flow rate and head of the pump. By providing the trapezoidal grooves 803 on the impeller 801, the weight of the rotor components is reduced, the bearing load force is decreased, and its service life is prolonged.
[0029] Embodiment 2: As Figures 1-6 shown, a water outlet end cover 2 is installed at one end of the pump body 4, a water inlet end cover 12 is installed at the other end of the pump body 4, bearings are installed inside the second pump shaft 5 and the first pump shaft 10, the bearings are installed inside the pump body 4, mechanical seals II 3 and mechanical seals I 11 are respectively installed on both sides of the pump body 4, a runner 9 is installed outside the first pump shaft 10, and a nut 1 is arranged at one end of the pump body 4.
[0030] In this embodiment, the water outlet end cover 2 ensures that water enters at an appropriate direction and speed, achieving efficient energy conversion, preventing leakage at the water inlet, ensuring the stability of the system pressure and flow rate. The water inlet end cover 12 guides the water to flow out along a predetermined path to meet the layout and working requirements of the system, helping to stabilize the water outlet pressure of the pump and ensuring the normal operation of the system. The second mechanical seal 3 and the first mechanical seal 11 are beneficial to improving the fluid sealing performance. The runner 9 converts the kinetic energy and pressure energy of the fluid into each other, thereby realizing the suction and conveying functions of the jet pump, promoting the full mixing of the suction fluid and the working fluid, reducing the fluctuations of the flow rate and pressure, and improving the working efficiency of the pump.
[0031] Working principle of this embodiment: During operation, the runner 9 drives the first pump shaft 10 to rotate, and the first pump shaft 10 drives the impeller assembly 8 and the rotor cavity 6 to rotate synchronously. The liquid enters the impeller assembly 8 from the first pump shaft 10, and after being accelerated and pressurized by the impeller assembly 8, it enters the pitot tube 7 and is discharged after being pressurized by the pitot tube 7, realizing the conveyance of the fluid.
[0032] The above are only the preferred embodiments of the present invention, and are not limitations to the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims
1. A high-speed rotary jet pump, comprising a pump body (4), characterized in that: The pump body (4) has a rotor cavity (6) formed inside, one side of the rotor cavity (6) is connected to an impeller assembly (8), the other side of the rotor cavity (6) is connected to a second pump shaft (5), one side of the impeller assembly (8) is connected to a first pump shaft (10), and a pitot tube (7) is provided inside the rotor cavity (6); The pump shaft (10) further comprises a shaft body (1001), wherein a spiral groove (1002) is provided inside the shaft body (1001); The Pitot tube (7) further comprises a suction end (701) and a discharge end (702), wherein the suction end (701) and the discharge end (702) are threadedly connected; The impeller assembly (8) further comprises an impeller (801), wherein a plurality of flow channels (802) are provided inside the impeller (801), and a trapezoidal groove (803) is provided between two adjacent flow channels (802).
2. The high-speed rotary jet pump according to claim 1, characterized in that: A water outlet end cover (2) is installed at one end of the pump body (4), and a water inlet end cover (12) is installed at the other end of the pump body (4).
3. The high-speed rotary jet pump according to claim 1, characterized in that: Bearings are installed on the inner sides of the pump shaft 2 (5) and the pump shaft 1 (10), and the bearings are installed on the inner side of the pump body (4).
4. The high-speed rotary jet pump according to claim 1, characterized in that: The two sides of the pump body (4) are respectively provided with a second mechanical seal (3) and a first mechanical seal (11).
5. The high-speed rotary jet pump according to claim 1, characterized in that: A runner (9) is installed on the outer side of the pump shaft (10).
6. The high-speed rotary jet pump according to claim 1, characterized in that: A nut (1) is provided at one end of the pump body (4).