A pump capable of increasing flow and pressure

Abstract

The present application belongs to the technical field of water pump, and relates to a pump capable of increasing flow and pressure, comprising a pump body, a water inlet and a water outlet arranged on the pump body, an impeller and a water outlet cover arranged in the pump body and used for guiding pressurized fluid to the pump cavity, the water inlet and the inlet of the impeller being communicated through a flow channel body, the flow channel body comprising a throat pipe and a nozzle, the water outlet and the nozzle being respectively communicated with the pump cavity, the outer side of the nozzle being provided with a conversion turbine driven by a power device in two directions, the water pump being in a flow-increasing mode and a pressure-increasing mode respectively when the conversion turbine rotates in different directions, the conversion turbine driving fluid to flow in the opposite direction of the nozzle in the flow-increasing mode, and the conversion turbine driving fluid to flow in the direction of the nozzle in the pressure-increasing mode. The pump capable of increasing flow and pressure can select a high-flow mode or a high-lift mode according to actual requirements.

Description

Technical Field

[0001] This invention belongs to the technical field of water pumps and relates to a pump that can increase flow and pressure. Background Technology

[0002] The performance of a water pump depends on two operating parameters: head and flow rate. The curve showing the relationship between head and flow rate is as follows:

[0003] The relationship is inverse: higher head results in lower flow rate, and lower head results in higher flow rate. In practical applications, there may be different requirements for either high flow rate or high head. A jet pump is a common type of self-priming pump. Its operation is as follows: water enters through the inlet, flows through the throat of the flow channel to the impeller end, the motor drives the impeller to rotate, and the water is thrown towards the outer edge of the impeller under centrifugal force, then enters the pump body through the outlet cover. A portion flows back through the return hole of the flow channel, merges with the water entering through the inlet, and re-enters the throat. Under the action of the high-speed rotating impeller, it flows towards the outer edge of the impeller again. The other portion of the water exits through the outlet. However, the cross-sectional area ratio of the nozzle to the throat remains unchanged, resulting in a limited flow rate when the pump is fully open.

[0004] Chinese invention patent application CN 114992133 A discloses a flow-boosting pump, comprising a pump body with an inlet and an outlet. The pump body includes an inlet chamber, a pressurization chamber, and a flow channel. The inlet chamber and the pressurization chamber are connected by the flow-boosting channel. A one-way check mechanism is installed in the flow-boosting channel. When the liquid pressure in the inlet chamber is greater than the liquid pressure in the pressurization chamber, the one-way check mechanism opens the flow-boosting channel; when the liquid pressure in the inlet chamber is less than the liquid pressure in the pressurization chamber, the one-way check mechanism blocks the flow-boosting channel. This pump achieves the effect of increasing flow and improving pump performance by opening and closing the flow-boosting channel through the one-way check mechanism.

[0005] Chinese invention patent application CN 115199594 A discloses a jet self-priming pump, including a pump casing and an impeller. The impeller is rotatably disposed inside the pump casing on one side. The pump casing has a circulation chamber for jet circulation, and an ejector assembly is located within the circulation chamber. The ejector assembly has a jet pipe fixedly disposed within the pump casing, arranged along the pump's axis with its end facing the center of the impeller. A pre-guide tube is connected to the front end of the jet pipe, and an inducer wheel is disposed within the pre-guide tube. The inducer wheel has a shaft, and multiple helical blades are spirally arranged around the outer wall of the shaft. The impeller's drive shaft extends along the pump's axis through the jet pipe into the pre-guide tube and connects to the shaft of the inducer wheel. The outer edge outlet of the impeller communicates with the circulation chamber through a guide vane chamber. This patent achieves pressurization by using an inducer wheel connected to the pump's drive shaft.

[0006] Therefore, none of the above-mentioned pumps can simultaneously meet the requirements of both high flow rate and high head. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a pump that can increase both flow and pressure, allowing users to select between a high-flow mode and a high-head mode based on actual needs.

[0008] To solve the above-mentioned technical problems, the objective of this invention is achieved through the following technical solution:

[0009] A pump capable of both increasing flow and increasing pressure includes a pump body with an inlet and an outlet. The pump body contains an impeller and an outlet cover that guides pressurized fluid into the pump chamber. The inlet and impeller inlet are connected via a flow channel, which includes a throat and a nozzle. The outlet and nozzle are respectively connected to the pump chamber. A bidirectional driven converter turbine is located outside the nozzle. When the converter turbine rotates in different directions, the pump operates in a flow-increasing mode and a pressure-increasing mode, respectively. In the flow-increasing mode, the converter turbine drives the fluid to flow in the opposite direction to the nozzle; in the pressure-increasing mode, the converter turbine drives the fluid to flow towards the nozzle.

[0010] In the aforementioned pump capable of both increasing flow and increasing pressure, the impeller is mounted on the pump shaft and driven by the main motor, and the pump shaft, impeller, throat, nozzle, and conversion turbine are coaxially arranged.

[0011] In the aforementioned pump capable of increasing flow and pressure, a conical cover is provided at the inlet of the nozzle, and the conversion turbine rotates within the cover. Preferably, the cover is coaxially arranged with the nozzle and integrally formed with the flow channel body.

[0012] In the aforementioned pump capable of both increasing flow and increasing pressure, the power device driving the conversion turbine is a motor assembly. The motor assembly includes an inner rotor and an outer stator. The inner rotor includes magnets, and the outer stator includes windings. When the current direction in the outer stator is different, the motor assembly drives the conversion turbine to rotate in different directions.

[0013] In the aforementioned pump capable of increasing flow and pressure, the conversion turbine includes a turbine shaft and several helical blades, and the inner rotor is fixedly connected to the turbine shaft.

[0014] In the aforementioned pump capable of increasing flow and pressure, the motor assembly includes a motor housing and a motor base. The inner rotor and turbine shaft are rotatably mounted within the motor base. The outer stator is disposed in a cavity between the motor base and the motor housing. A motor cover is fixed to the outer side of the motor housing, and the motor cover has an outlet hole for a power cable to pass through. The power cable is electrically connected to the windings on the outer stator. Furthermore, the motor cover is connected to the motor housing by several fasteners and seals the cavity containing the outer stator. Further, the power cable and windings are electrically connected within an electrical enclosure.

[0015] In the aforementioned pump capable of increasing flow and pressure, the motor housing and motor base are integrally formed with the pump body, the motor base is formed by a portion of the pump body protruding outward, and the inner rotor and conversion turbine are built into the pump cavity.

[0016] In the aforementioned pump capable of both increasing flow and pressure, a protective sleeve is provided inside the motor base, and the inner rotor is rotatably mounted within the protective sleeve. The annular magnet of the inner rotor is fixed to the turbine shaft, and a rotor sleeve is fitted over the annular magnet. Preferably, the protective sleeve is a ceramic sleeve with an outer closed end, the rotor sleeve is a stainless steel sleeve with an outer closed end, and the annular magnet is bonded to the turbine shaft with adhesive.

[0017] In the aforementioned pump capable of both increasing flow and increasing pressure, a monitoring turbine is installed at the outlet. The monitoring turbine includes a monitoring bracket fixedly connected to the outlet, and monitoring blades are rotatably mounted on the monitoring bracket. A sensor for monitoring the rotational speed of the monitoring blades is installed between the monitoring blades and the monitoring bracket. Preferably, the sensor is a Hall sensor, and the magnet and Hall element of the Hall sensor are respectively mounted on the monitoring blades and the monitoring bracket.

[0018] In the aforementioned pump capable of increasing flow and pressure, the pump is equipped with manual and automatic modes to control the direction and speed of the switching turbine. In manual mode, the switching turbine is controlled by manually selecting the current condition. In automatic mode, the flow rate and head of the turbine sensing pump are monitored and compared with preset values ​​to automatically switch the direction and speed of the switching turbine.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This invention provides a pump that can increase flow and pressure. When the turbine rotates in the direction of increasing flow, a negative pressure is generated at the nozzle, which reduces or even completely blocks the backflow of water in the pump chamber from the nozzle, thereby increasing the flow rate of the pump and reducing the pressure of the pump. When the turbine rotates in the direction of increasing pressure, more water will flow back from the nozzle, thereby reducing the flow rate of the pump and increasing the pressure of the pump.

[0021] 2. In boost mode, the liquid outside the converter turbine is subjected to centrifugal force, which helps to compress the bubbles to the outer edge and condense on the converter turbine, thereby avoiding the blockage of the nozzle and throat, further increasing the flow rate, increasing the pump head, improving the pump's anti-cavitation performance, and reducing noise.

[0022] 3. The present invention places the turbine and the turbine drive structure on the outside of the flow channel body to avoid affecting the flow effect of the flow channel body, and also avoids setting a one-way check structure or transmission structure in the narrow space of the flow channel body.

[0023] 4. This invention integrates the turbine drive structure into the pump body, which simplifies the structure, reduces the number of parts, and lowers costs. Furthermore, the invention employs a built-in rotor and turbine structure, completely sealing the rotor and converter turbine within the pump chamber, thus avoiding the leakage risks associated with using seals.

[0024] 5. This invention provides two control methods, allowing users to choose between manual or automatic control as needed. This invention can control not only the rotation direction of the converter turbine but also its rotational speed, thereby quantitatively controlling the pump's flow rate and head. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the present invention;

[0026] Figure 2 This is a partial cross-sectional view of the present invention;

[0027] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0028] Figure 4 This is a structural diagram of the conversion turbine and inner rotor of the present invention;

[0029] Reference numerals in the attached diagram: 1. Pump body; 2. Inlet; 3. Outlet; 4. Impeller; 5. Outlet cover; 6. Flow channel; 7. Throat; 8. Nozzle; 9. Converter turbine; 10. Pump shaft; 11. Main motor; 12. Cover; 13. Inner rotor; 14. Outer stator; 15. Turbine shaft; 16. Helical blade; 17. Motor housing; 18. Motor base; 19. Motor cover; 20. Outlet hole; 21. Protective sleeve; 22. Annular magnet; 23. Rotor sleeve; 24. Monitoring bracket; 25. Monitoring blade. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-4 :

[0031] A pump capable of both increasing flow and increasing pressure includes a pump body 1, on which an inlet 2 and an outlet 3 are provided. An impeller 4 and an outlet cover 5 for guiding pressurized fluid into the pump chamber are provided inside the pump body 1. The inlet 2 and the inlet of the impeller 4 are connected through a flow channel body 6. The flow channel body 6 includes a throat 7 and a nozzle 8. The outlet 3 and the nozzle 8 are respectively connected to the pump chamber. A bidirectional driven conversion turbine 9 is provided on the outside of the nozzle 8. When the conversion turbine 9 rotates in different directions, the pump is in a flow-increasing mode and a pressure-increasing mode, respectively. In the flow-increasing mode, the conversion turbine 9 drives the fluid to flow in the opposite direction to the nozzle 8. In the pressure-increasing mode, the conversion turbine 9 drives the fluid to flow in the direction of the nozzle 8.

[0032] During operation, water enters through inlet 2, flows through the throat 7 of flow channel 6 to the inlet of impeller 4, and the main motor 11 drives impeller 4 to rotate. Under the action of centrifugal force, the water is thrown towards the outer edge of impeller 4 and then enters the pump chamber of pump body 1 through outlet cover 5. Part of the water in the pump chamber flows back through nozzle 8 of flow channel 6, merges with the water entering through inlet 2, and re-enters the throat 7. The other part of the water exits through outlet 3. In flow-increasing mode, the converter turbine 9 rotates in the flow-increasing direction, which generates negative pressure at nozzle 8, reducing or even completely blocking the backflow of water in the pump chamber from nozzle 8, thereby increasing the pump flow rate and reducing the pump pressure. In pressurization mode, the converter turbine 9 rotates in the pressurization direction, and more water flows back from nozzle 8, thereby reducing the pump flow rate and increasing the pump pressure.

[0033] Preferably, the impeller 4 is mounted on the pump shaft 10 and driven by the main motor 11, and the pump shaft 10, impeller 4, throat 7, nozzle 8 and conversion turbine 9 are coaxially arranged.

[0034] A conical cover 12 is provided at the inlet of the nozzle 8, and the converter turbine 9 rotates within the cover 12. Preferably, the cover 12 is coaxially arranged with the nozzle 8 and integrally formed with the flow channel body 6. By providing the cover 12, the converter turbine 9 can better act on the fluid at the inlet of the nozzle 8, changing the pressure of the fluid inside the cover 12, i.e., at the inlet of the nozzle 8, to obtain a better pressurization or flow enhancement effect.

[0035] In this embodiment, the specific drive structure of the conversion turbine 9 is as follows: the power device driving the conversion turbine 9 is a motor assembly, which includes an inner rotor 13 and an outer stator 14. The inner rotor 13 includes magnets, and the outer stator 14 includes windings. When the current direction in the outer stator 14 is different, the motor assembly drives the conversion turbine 9 to rotate in different directions.

[0036] Furthermore, the conversion turbine 9 includes a turbine shaft 15 and several helical blades 16. The inner rotor 13 is fixedly connected to the turbine shaft 15. When the motor assembly is working, the inner rotor 13 rotates, driving the turbine shaft 15 to rotate synchronously.

[0037] Furthermore, the motor assembly includes a motor housing 17 and a motor base 18. The inner rotor 13 and the turbine shaft 15 are rotatably mounted within the motor base 18. The outer stator 14 is disposed in the cavity between the motor base 18 and the motor housing 17. A motor cover 19 is fixed to the outside of the motor housing 17. The motor cover 19 is provided with a lead-out hole 20 for a power cable to pass through. The power cable is electrically connected to the windings on the outer stator 14. Furthermore, the motor cover 19 is connected to the motor housing 17 by several fasteners and seals the cavity where the outer stator 14 is located. Furthermore, the power cable and the windings are electrically connected inside the electrical enclosure.

[0038] The aforementioned motor housing 17 and motor base 18 are integrally formed with the pump body 1. The motor base 18 is formed by a portion of the pump body 1 protruding outward. The inner rotor 13 and the conversion turbine 9 are built into the pump cavity. By building the inner rotor 13 and the conversion turbine 9 into the pump cavity, the conversion turbine 9 and its drive structure can be prevented from affecting the sealing performance of the water pump.

[0039] To facilitate better rotation of the inner rotor 13 and the turbine, a protective sleeve 21 is provided inside the motor housing 18. The inner rotor 13 is rotatably mounted within the protective sleeve 21. The annular magnet 22 of the inner rotor 13 is fixed to the turbine shaft 15, and a rotor sleeve 23 is fitted over the annular magnet 22. Preferably, the protective sleeve 21 is a ceramic sleeve with a closed outer end, and the rotor sleeve 23 is a stainless steel sleeve with a closed outer end. The annular magnet 22 is bonded to the turbine shaft 15 with adhesive.

[0040] This embodiment also provides a control structure for the water pump. A monitoring turbine is installed at the outlet 3. The monitoring turbine includes a monitoring bracket 24 fixedly connected to the outlet 3. A monitoring blade 25 is rotatably mounted on the monitoring bracket 24. A sensor for monitoring the rotational speed of the monitoring blade 25 is installed between the monitoring blade 25 and the monitoring bracket 24. Preferably, the sensor is a Hall sensor, with the magnet and Hall element of the Hall sensor respectively mounted on the monitoring blade 25 and the monitoring bracket 24. By detecting the rotational speed of the monitoring turbine using the Hall sensor, the flow velocity at the water pump outlet 3 can be obtained, thereby acquiring the real-time flow rate and head information of the water pump.

[0041] This embodiment provides two control modes for selection: the water pump is equipped with a manual mode and an automatic mode to control the direction and speed of the conversion turbine 9. In the manual mode, the conversion turbine 9 is controlled by manually selecting the current condition; in the automatic mode, the flow rate and head of the turbine sensing water pump are monitored and then compared with preset values ​​to automatically switch the direction and speed of the conversion turbine 9.

[0042] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pump capable of increasing flow and pressure, comprising a pump body (1), wherein the pump body (1) is provided with an inlet (2) and an outlet (3), and an impeller (4) and an outlet cover (5) for guiding pressurized fluid into the pump cavity are provided inside the pump body (1), wherein the inlet (2) and the inlet of the impeller (4) are connected through a flow channel body (6), wherein the flow channel body (6) includes a throat (7) and a nozzle (8), and the outlet (3) and the nozzle (8) are respectively connected to the pump cavity, characterized in that, A bidirectional drive conversion turbine (9) is provided on the outside of the nozzle (8). When the conversion turbine (9) rotates in different directions, the water pump is in the flow boosting mode and the pressure boosting mode respectively. In the flow boosting mode, the conversion turbine (9) drives the fluid to flow in the opposite direction to the nozzle (8). In the pressure boosting mode, the conversion turbine (9) drives the fluid to flow in the direction of the nozzle (8).

2. The pump capable of increasing flow and pressure according to claim 1, characterized in that, The impeller (4) is mounted on the pump shaft (10) and driven by the main motor (11). The pump shaft (10), impeller (4), throat (7), nozzle (8) and conversion turbine (9) are coaxially arranged.

3. The pump capable of increasing flow and pressure according to claim 1, characterized in that, A conical cover (12) is provided at the inlet of the nozzle (8), and the conversion turbine (9) rotates inside the cover (12).

4. The pump capable of increasing flow and pressure according to claim 1, characterized in that, The power unit driving the conversion turbine (9) is a motor assembly, which includes an inner rotor (13) and an outer stator (14). The inner rotor (13) includes magnets, and the outer stator (14) includes windings. When the current direction in the outer stator (14) is different, the motor assembly drives the conversion turbine (9) to rotate in different directions.

5. A pump capable of increasing flow and pressure according to claim 4, characterized in that, The conversion turbine (9) includes a turbine shaft (15) and several helical blades (16), and the inner rotor (13) is fixedly connected to the turbine shaft (15).

6. A pump capable of increasing flow and pressure according to claim 5, characterized in that, The motor assembly includes a motor housing (17) and a motor base (18). The inner rotor (13) and the turbine shaft (15) are rotatably disposed in the motor base (18). The outer stator (14) is disposed in the cavity between the motor base (18) and the motor housing (17). A motor cover (19) is fixed on the outside of the motor housing (17). The motor cover (19) is provided with an outlet hole (20) for the power line to pass through. The power line is electrically connected to the winding on the outer stator (14).

7. A pump capable of increasing flow and pressure according to claim 6, characterized in that, The motor housing (17) and motor base (18) are integrally formed with the pump body (1). The motor base (18) is formed by a portion of the pump body (1) protruding outward. The inner rotor (13) and the conversion turbine (9) are built into the pump cavity.

8. A pump capable of increasing flow and pressure according to claim 6, characterized in that, The motor base (18) is provided with a protective sleeve (21), the inner rotor (13) is rotatably disposed in the protective sleeve (21), the annular magnet (22) of the inner rotor (13) is fixed on the turbine shaft (15), and the annular magnet (22) is covered with a rotor sleeve (23).

9. A pump capable of increasing flow and pressure according to claim 1, characterized in that, A monitoring turbine is provided at the outlet (3). The monitoring turbine includes a monitoring bracket (24) fixedly connected to the outlet (3). A monitoring blade (25) is rotatably mounted on the monitoring bracket (24). A sensor for monitoring the rotational speed of the monitoring blade is provided between the monitoring blade (25) and the monitoring bracket (24).

10. A pump capable of increasing flow and pressure according to claim 9, characterized in that, The water pump is equipped with manual and automatic modes to control the direction and speed of the switching turbine (9). In manual mode, the switching turbine (9) is controlled by manually selecting the current condition. In automatic mode, the flow rate and head of the turbine sensing water pump are monitored and compared with preset values ​​to automatically switch the direction and speed of the switching turbine (9).

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