An energy-saving and high-efficiency centrifugal water pump

Abstract

This invention provides an energy-efficient centrifugal water pump, belonging to the field of centrifugal pump technology. It includes a base, with a pressure chamber, a suction chamber, a discharge chamber, and a balancing component sequentially fixed to the top of the base. The pressure chamber is connected to the discharge chamber via the suction chamber. A pump shaft is rotatably mounted on the balancing component, with one end of the pump shaft fixed to the output shaft of a motor. Each guide vane has a turbulence inlet, and the outer edges of every two adjacent guide vanes are connected. The axial flow channel profile of the guide vane is arc-shaped, and the circumferential outer wall of the guide vane is also arc-shaped. By using integrally formed guide vanes and turbulence inlets at the center of the impeller, the impeller outlet is widened and extended to the arc-shaped section at the inlet, eliminating the drawbacks of the original flow channel being large at the outside and small at the inside, and the outlet diffusion section being too large. Simultaneously, reducing the outer diameter of the hub on the rear cover plate and increasing the impeller inlet flow area helps improve the uniformity of fluid flow, reduce flow losses, and thus improve pump efficiency.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, specifically to an energy-saving and high-efficiency centrifugal water pump. Background Technology

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started, and the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pump's discharge pipe through the flow channel of the volute casing. The basic structure of a centrifugal pump consists of six parts: impeller, pump body, pump shaft, bearing, sealing ring, and stuffing box.

[0003] Related technology 1 (publication number: CN101208521A) discloses a centrifugal pump. The disclosed technical solution involves a guide vane extending in the front space portion constituting the original impeller chamber, while the impeller disk and the rear portion of the guide vane connected to the impeller disk are installed in the rear space portion. Due to this novel impeller arrangement and the resulting chamber separation and expansion, the centrifugal effect formed in the front chamber extending between the liquid inlet and outlet is disrupted. In other words, the formation of a liquid ring containing gas that prevents the continuous entry of the liquid to be pumped is disrupted, and a defined vortex or turbulence occurs.

[0004] Related technology 2 (publication number: CN110088480A) discloses a centrifugal pump, the disclosed technical solution of which is to design the sealing ring such that, during operation, a hydrodynamic or hydrostatic liquid film is formed between the mutually moving surfaces of the sealing structure. Hydrodynamically, this can be achieved through a corresponding configuration of the sealing ring and / or its recess, such as a wedge shape; hydrostatically, it can be achieved, for example, through a channel provided in the sealing ring leading to the pressure side, which in turn leads into the sealing surface. A combination of hydrodynamically and hydrostatically formed liquid films can also be provided.

[0005] Related technology 3 (publication number: CN110431313B) discloses a centrifugal pump unit, the disclosed technical solution of which: in a first switching position, a first flow path is closed and a second flow path is open; in a second switching position, the first flow path is open and the second flow path is closed. The valve element can also be configured as a mixing valve, in which the liquid flows from the two flow paths are mixed in a variable proportion. Advantageously, in this technical solution, the valve element can occupy more than two switching positions, in which the flow paths are opened to different degrees. Preferably, the valve element is designed such that, during its displacement, one flow path is closed to a certain degree, while the other flow path is simultaneously opened to the same degree.

[0006] The aforementioned disclosed technical solutions reveal the following problems: Water pumps consume a significant amount of electricity during the transportation of industrial and domestic water. Statistics show that centrifugal pumps account for approximately one-third of the total energy consumption of pump products, while pumps worldwide consume about one-quarter of the total electricity generated, with centrifugal pumps consuming one-twelfth of the total electricity generated.

[0007] The large pressure difference between the working surface and the back surface of the guide vanes in a centrifugal pump easily leads to cavitation. Cavitation causes material erosion, degrades pump performance, affects the normal flow of fluid within the pump, and increases energy consumption. However, reducing the number of guide vanes to avoid cavitation results in a decrease in pump head and low efficiency. Therefore, we propose an energy-efficient and high-performance centrifugal pump.

[0008] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Summary of the Invention

[0009] This invention aims to solve at least one of the technical problems existing in the prior art or related technologies. To address the energy-saving problem of centrifugal pumps in the prior art, this invention provides an energy-efficient centrifugal water pump that achieves high efficiency and energy saving by employing a secondary pressurization component combined with a special guide vane shape. The specific technical solution is as follows:

[0010] An energy-saving and high-efficiency centrifugal water pump includes a base. A booster chamber, a suction chamber, a discharge chamber, and a balancing component are sequentially fixed to the top of the base. The booster chamber is connected to the discharge chamber through the suction chamber. A pump shaft is rotatably mounted on the balancing component. One end of the pump shaft is fixed to the output shaft of a motor, and the other end of the pump shaft extends through the discharge chamber and into the inner cavity of the suction chamber.

[0011] An impeller is fitted onto the outer wall of the pump shaft located in the discharge chamber. Guide vanes are arranged in a circumferential array on the outer wall of the impeller. Each guide vane has a turbulence opening, and the outer peripheral edges of every two adjacent guide vanes are connected. The axial flow channel profile of the guide vane is arc-shaped, and the circumferential outer wall of the guide vane is arc-shaped.

[0012] The inner wall of the suction chamber is fitted with a rotatable screen cylinder connected to the pump shaft. The opening of the screen cylinder faces the pressurization chamber. The suction chamber is equipped with a cleaning component for cleaning the screened material on the screen cylinder. A secondary pressurization component is provided between the screen cylinder and the pressurization chamber.

[0013] In the above technical solution, the impurity removal component includes a nozzle embedded in the cavity of the suction chamber, and nozzles that spray toward the screen cylinder are evenly arranged on the outer wall of the nozzle. An impurity discharge hopper located in the cavity of the screen cylinder is fixed to the inner wall of the suction chamber, and the impurity discharge hopper corresponds to the nozzles. A discharge pipe extending out of the suction chamber is fixed to the bottom of the impurity discharge hopper.

[0014] A water inlet pipe connected to the suction chamber is fixedly connected to the bottom of the outer wall of the pressurization chamber, and a connecting pipe is fixedly connected to the top of the outer wall of the pressurization chamber, with a valve installed on the connecting pipe.

[0015] A water level indicator pipe is fixed to the top of the outer wall of the water diversion pipe.

[0016] The secondary pressurization assembly includes a conical pressurization chamber embedded in the inner wall of the suction chamber. The conical pressurization chamber is located between the water inlet pipe and the suction chamber. The outer wall of the conical pressurization chamber has symmetrically opened eccentric holes that communicate with the water inlet pipe. The conical pressurization chamber has uniformly opened flow holes on one side opposite to the screen cylinder. The inclined surface of the conical pressurization chamber is located on the side closer to the water inlet pipe. The inner cavity of the conical pressurization chamber is rotatably equipped with a turbine corresponding to the eccentric holes.

[0017] The balancing component includes a support fixed to the top of the base, the support being rotatably disposed outside the pump shaft, and ball bearings being circumferentially arranged between the support and the pump shaft.

[0018] The top of the pressurization chamber has an opening, and the top of the outer wall of the pressurization chamber is fitted with a sealing membrane covering the opening.

[0019] The inner cavity of the inhalation chamber is symmetrically fitted with T-shaped limiting seats, and T-shaped sliding grooves are provided on both sides of the sieve cylinder. The T-shaped limiting seats are slidably disposed on the inner wall of the T-shaped sliding grooves.

[0020] Both sides of the outer wall of the discharge hopper are fixed with one end of a fixing rod, and the other end of the fixing rod passes through the outer wall of the discharge hopper and is fixed to the inner wall of the suction chamber.

[0021] A delivery pipe is embedded in the outer wall of the discharge chamber.

[0022] Compared with the prior art, the beneficial effects of the present invention are: this energy-saving and high-efficiency centrifugal water pump:

[0023] First, by incorporating one-piece molded guide vanes and a flow-dispersing inlet at the center of the impeller, the impeller outlet is widened and extended to the arc section at the inlet, eliminating the drawbacks of the original flow channel being larger at the outside and smaller at the inside, and the outlet diffuser section being too large. Simultaneously, reducing the outer diameter of the hub on the rear cover plate and increasing the impeller inlet flow area helps improve the uniformity of fluid flow, reduce flow losses, and thus improve pump efficiency.

[0024] Second, by increasing the impeller inlet angle and opening area, and eliminating guide vane inlet pitch error, the inlet flow can be made more uniform and symmetrical, reducing flow separation and vortex phenomena, and further improving pump efficiency. The design of the impeller inlet angle and opening area has a significant impact on pump efficiency. By using the arc-shaped design of the guide vanes and the turbulence inlet, the throat area of ​​the guide vanes can be enlarged, and the inlet flow resistance of the guide vanes can be reduced, allowing the impeller outlet velocity and the guide vane inlet velocity to achieve optimal matching. This optimization not only improves pump efficiency but also shifts the high-efficiency region towards higher flow rates, expanding the pump's high-efficiency operating range.

[0025] Third, by rounding and flattening the inlet and outlet of the guide vane, a constricted flow channel is formed from the outlet of the guide vane to the inlet of the next stage impeller. This can further improve the uniformity of the impeller inlet velocity, reduce flow resistance, improve the flow conditions at the impeller inlet, and thus improve the overall efficiency of the pump.

[0026] Fourth, when impurities rotate to the impurity removal component, they are discharged from inside the screen cylinder to the outside of the suction chamber, preventing clogging and ensuring smooth water flow. The secondary pressurization component enhances water flow dynamics, resulting in energy savings.

[0027] 5. When the water flows into the suction chamber, it enters the conical pressurization chamber through the eccentric holes. The eccentric holes on both sides cause the water to form a vortex inside the conical pressurization chamber. The vortex drives the turbine to rotate, increasing the water flow rate. Then the water enters the screen cylinder through the flow holes, and then the water source is transported by the rotation of the impeller. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an energy-saving and high-efficiency centrifugal water pump according to the present invention;

[0029] Figure 2 This is a structural cross-sectional view of an energy-saving and high-efficiency centrifugal water pump according to the present invention;

[0030] Figure 3 This is an exploded view of the sieve cylinder portion of the present invention;

[0031] Figure 4 This is a cross-sectional view of the sieve cylinder portion of the present invention;

[0032] Figure 5 This is a schematic diagram of the sieve cylinder portion of the present invention;

[0033] Figure 6 This is an exploded view of the secondary pressurization component of the present invention;

[0034] Figure 7This is a schematic diagram of the conical pressurization chamber portion of the present invention;

[0035] Figure 8 This is a schematic diagram of the guide vane portion of the present invention;

[0036] Figure 9 for Figure 2 Enlarged view of a portion at point A;

[0037] Figure 10 This is a comparative diagram of the hydraulic model experiments of the present invention;

[0038] in, Figures 1 to 9 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-base, 2-pressurization chamber, 21-water inlet pipe, 22-connecting pipe, 23-water level indicator pipe, 24-sealing membrane, 3-suction chamber, 31-T-type limit seat, 32-T-type chute, 4-discharge chamber, 41-screen cylinder, 5-balance component, 6-pump shaft, 7-impeller, 71-guide vane, 72-turbulence port, 8-impurity removal component, 81-nozzle, 82-nozzle head, 83-impurity discharge hopper, 84-discharge pipe, 9-secondary pressurization component, 91-conical pressurization chamber, 92-eccentric hole, 93-flow hole, 94-turbine, 11-fixed rod. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The following are specific implementation cases and appendices. Figure 1 -Appendix Figure 10 The present invention will be further described, but the present invention is not limited to these embodiments.

[0041] An energy-efficient centrifugal water pump includes a base 1. A booster chamber 2, a suction chamber 3, a discharge chamber 4, and a balancing component 5 are sequentially fixed to the top of the base 1. The booster chamber 2 is connected to the discharge chamber 4 via the suction chamber 3. From left to right, the booster chamber 2, suction chamber 3, discharge chamber 4, balancing component 5, and a motor are fixedly installed on the top of the base 1. The motor is fixed to the rightmost side of the top of the base 1 via a frame. The motor's output shaft is fixedly connected to one end of a pump shaft 6. The other end of the pump shaft 6 extends through the inner cavity of the discharge chamber 4 into the interior of the suction chamber 3. The suction chamber 3 is fixedly embedded in the left side of the discharge chamber 4, connecting the inner cavities of the suction chamber 3 and the discharge chamber 4. The motor is connected to an external power source via wires.

[0042] A pump shaft 6 is rotatably mounted on the balancing component 5. One end of the pump shaft 6 is fixedly connected to the output shaft of the motor, and the other end of the pump shaft 6 extends through the discharge chamber 4 and into the inner cavity of the suction chamber 3. The balancing component 5 is used to support the pump shaft 6, ensuring the stability of the pump shaft 6 located between the discharge chamber 4 and the motor. The balancing component 5 can be a bearing, which is fixed to the top of the base 1 by a bearing seat. Through the support of the balancing component 5, the friction and vibration of the pump shaft 6 during rotation are reduced, thereby ensuring the stability of the centrifugal pump during use.

[0043] An impeller 7 is fitted onto the outer wall of the pump shaft 6 located inside the discharge chamber 4. Guide vanes 71 are arranged in a circumferential array on the outer wall of the impeller 7. The impeller 7 is fixedly fitted onto the outer wall of the pump shaft 6 through a central mounting hole, and is located inside the discharge chamber 4, allowing it to rotate with the pump shaft 6 within the chamber. Water is discharged to the outside through a discharge pipe located at the top of the discharge chamber 4 using centrifugal force. A ring of guide vanes 71 is uniformly and obliquely fixedly installed on the circumferential outer wall of the impeller 7, forming a circumferential array of multiple guide vanes 71 centered on the center of the impeller 7.

[0044] Each guide vane 71 is provided with a turbulence port 72, and the outer peripheral edges of every two adjacent guide vanes 71 are connected. The axial flow channel profile of the guide vane 71 is arc-shaped, and the circumferential outer wall of the guide vane 71 is arc-shaped. The circumferential outer wall edges of all guide vanes 71 are sequentially fixedly connected by arc-shaped connecting pieces, so that the edges of all guide vanes 71 are an integral structure. A turbulence port 72 is left between the connecting piece used to connect two adjacent guide vanes 71 and the center of the impeller 7.

[0045] By incorporating an integrally formed guide vane 71 and a turbulence inlet 72 at the center of the guide vane 71 and impeller 7, the outlet of impeller 7 is widened and extended to the arc section at the inlet, eliminating the drawbacks of the original flow channel being larger at the outside and smaller at the inside, and the outlet diffuser section being too large. Simultaneously, reducing the outer diameter of the hub on the rear cover plate side and increasing the inlet flow area of ​​impeller 7 helps improve the uniformity of fluid flow, reduce flow losses, and thus improve pump efficiency. Furthermore, by increasing the inlet angle and opening area of ​​impeller 7 and eliminating the inlet pitch error of guide vane 71, the inlet flow becomes more uniform and symmetrical, reducing flow separation and vortex phenomena, further improving pump efficiency.

[0046] Each guide vane 71 has a smoothed surface, improving the smoothness and flatness of the impeller flow channel. The flow channel of the impeller 7, including the transition surfaces of adjacent components, achieves a smooth and rounded appearance, with a stable change in flow area, conforming to the flow characteristics of a high-efficiency pump. By reducing the roughness of the flow channel surface and local resistance, flow losses can be significantly reduced, improving the overall efficiency of the pump. The design of the impeller 7's inlet angle and opening area has a significant impact on the pump's efficiency.

[0047] By using the arc-shaped design of the guide vane 71 and the turbulence inlet 72 to enlarge the throat area of ​​the guide vane 71 and reduce the inlet flow resistance, the outlet velocity of the impeller 7 and the inlet velocity of the guide vane 71 can be optimally matched. This optimization not only improves the pump efficiency but also shifts the high-efficiency zone towards higher flow rates, expanding the pump's high-efficiency operating range. Furthermore, by expanding the diffuser section and smoothing the churn zone with the arc-shaped flow channel profile of the guide vane 71, flow separation and energy loss at the guide vane outlet can be reduced, further improving pump efficiency.

[0048] The connection between the turbulence inlet 72 and the edge of the guide vane 71 significantly impacts the uniformity of the flow at the inlet of the next-stage impeller. By rounding and flattening the inlet and outlet of the guide vane, a constricted flow channel is formed from the outlet of the guide vane to the inlet of the next-stage impeller 7. This further improves the uniformity of the impeller inlet velocity, reduces flow resistance, and improves the flow conditions at the impeller inlet, thereby enhancing the overall pump efficiency.

[0049] The components of this invention are made of high-strength alloy materials, improving corrosion resistance and cavitation resistance, ensuring reliable pump operation in harsh environments. The bearings used in the balancing component 5 apply cold oil directly between the bearing pads and the shaft or thrust disc, forming an oil film for cooling. This eliminates the problem of hot and cold oil mixing or hot oil lubrication forming an oil film that can occur with ordinary bearings. While ensuring a stable water supply, this reduces fluid impact and vibration, lowers operating noise, and improves equipment stability.

[0050] A screen cylinder 41, connected to a pump shaft 6, is rotatably mounted against the inner wall of the suction chamber 3. The screen cylinder 41 has a cylindrical structure, with its opening facing left to receive water from the booster chamber 2. One end of the pump shaft 6 is fixedly connected to the motor output shaft on the outside of the discharge chamber 4 on the right side. The other end of the pump shaft 6 passes through the discharge chamber 4 and enters the interior of the suction chamber 3, then is vertically fixed to the surface of the screen cylinder 41, allowing the screen cylinder 41 to rotate circumferentially against the inner wall of the suction chamber 3 along with the pump shaft 6. Filter holes are evenly spaced on the surface where the pump shaft 6 and the screen cylinder 41 are fixed, allowing water to pass through the screen cylinder 41 for impurity removal before flowing into the discharge chamber 4. The opening of the screen cylinder 41 faces the booster chamber 2. A cleaning assembly 8 for cleaning the screened material on the screen cylinder 41 is installed on the suction chamber 3. A secondary pressurization assembly 9 is installed between the screen cylinder 41 and the booster chamber 2.

[0051] With the above structure, after water flows into the screen cylinder 41 through the opening, the centrifugal force generated by the rotating screen cylinder 41 adsorbs impurities onto the circumferential inner wall of the screen cylinder 41. The screened impurities rotate with the screen cylinder 41, and when they reach the impurity removal component 8, they are discharged from the screen cylinder 41 to the outside of the suction chamber 3, preventing clogging and ensuring smooth water flow. The secondary pressurization component 9 enhances the power of the water flow, resulting in energy savings.

[0052] The impurity removal component 8 includes a nozzle 81 embedded in the inner cavity of the suction chamber 3. The outer wall of the nozzle 81 is uniformly provided with nozzles 82 that spray towards the screen cylinder 41. The nozzle 81 is fixedly embedded in the top of the inner wall of the suction chamber 3. An external water inlet pipe extends from the top of the outer wall of the nozzle 81 through a fixed installation. Water from an external source is introduced through the water inlet pipe, allowing the impurity removal water to enter the interior of the nozzle 81. Multiple nozzles 82 simultaneously spray the water towards the top of the outer wall of the screen cylinder 41. The power provided by the nozzles 82 to the sprayed water dislodges impurities from the inner wall of the screen cylinder 41, causing the impurities to fall onto the discharge hopper 83 along with the sprayed water.

[0053] A discharge hopper 83 located inside the screen cylinder 41 is fixedly connected to the inner wall of the suction chamber 3, and the discharge hopper 83 corresponds to the nozzle 82. A discharge pipe 84 extending out of the suction chamber 3 is fixedly connected to the bottom of the discharge hopper 83. One end of a fixing rod 11 is vertically fixedly installed on both the left and right surfaces of the discharge hopper 83. The other end of the fixing rod 11 extends through the side wall of the screen cylinder 41 and is fixed to the inner wall of the suction chamber 3, so that the discharge hopper 83 is fixed in the inner cavity of the screen cylinder 41. The discharge pipe 84 is fixedly installed at the conical bottom of the discharge hopper 83. The discharge pipe 84 is connected to the conical bottom of the discharge hopper 83. After extending out of the screen cylinder 41, the discharge pipe 84 passes through the side wall of the suction chamber 3 through a curved part and extends to the top of the base 1. The water containing impurities discharged from the discharge pipe 84 is collected by a recovery box provided on the base 1.

[0054] With the above structure, the nozzle 82 carries the impurities attached to the screen cylinder 41 into the impurity discharge hopper 83 along with the sprayed water. The sprayed water and impurities are then discharged from the suction chamber 3 through the discharge pipe 84 via the impurity discharge hopper 83. This prevents impurities from clogging the screen holes on the screen cylinder 41, and the impurity removal process ensures the smoothness of the water pump's water intake process.

[0055] It is worth noting that a water inlet pipe 21, which communicates with the suction chamber 3, is fixedly connected to the bottom of the outer wall of the pressurization chamber 2, and a connecting pipe 22, which is equipped with a valve, is fixedly connected to the top of the outer wall of the pressurization chamber 2. The pressurization chamber 2 has a cylindrical structure and is vertically fixed to the top of the base 1. One end of the water inlet pipe 21 is fixedly installed at the bottom of the outer wall of the pressurization chamber 2, and the other end of the water inlet pipe 21 is sealed to the left side of the suction chamber 3. The connecting pipe 22 is fixedly installed at the top of the outer wall of the pressurization chamber 2.

[0056] With the above structure, when the water pump is in use, the water inside the booster chamber 2 is first discharged through the water inlet pipe 21, at which time a negative pressure is formed inside the booster chamber 2. Then, the valve on the connecting pipe 22 is opened, and the water is brought into the booster chamber 2 by the force of the siphon principle. The water then enters the suction chamber 3 from the booster chamber 2, thereby providing power for the water flow process, reducing the energy consumption of the water inlet process, and thus achieving the energy-saving effect.

[0057] In addition, a water level indicator pipe 23 is fixedly connected to the top of the outer wall of the water inlet pipe 21. Through the principle of communicating vessels, the water level indicator pipe 23 displays the water level inside the pressurization chamber 2, ensuring the water storage capacity inside the pressurization chamber 2.

[0058] In addition, the secondary pressurization assembly 9 includes a conical pressurization chamber 91 embedded in the inner wall of the suction chamber 3. The conical pressurization chamber 91 is fixedly embedded in the inside of the suction chamber 3, dividing the inside of the suction chamber 3 into two spaces. The screen cylinder 41 is located on the left side of the conical pressurization chamber 91, so that the large diameter surface of the conical pressurization chamber 91 fits against the inner wall of the suction chamber 3, and the slope of the conical pressurization chamber 91 and the suction chamber 3 form a flow space.

[0059] A conical pressurizing chamber 91 is located between the water inlet pipe 21 and the suction chamber 3. Symmetrical eccentric holes 92, connected to the water inlet pipe 21, are opened on the outer wall of the conical pressurizing chamber 91. Two eccentric holes 92 are symmetrically opened on both sides of the outer wall of the conical pressurizing chamber 91, positioned on opposite sides of the center of the conical pressurizing chamber 91. Flow holes 93 are evenly distributed on the side of the conical pressurizing chamber 91 opposite to the screen cylinder 41. The inclined surface of the conical pressurizing chamber 91 is located on the side closer to the water inlet pipe 21. A turbine 94, corresponding to the eccentric holes 92, is rotatably mounted inside the conical pressurizing chamber 91. A rotating shaft 96 rotates between the left and right inner walls of the conical pressurizing chamber 91. The turbine 94 is fixedly sleeved on the outside of the rotating shaft 96, causing the turbine 94 to rotate with the rotating shaft 96.

[0060] With the above structure, when water flows into the suction chamber 3, it enters the conical pressurization chamber 91 through the eccentric hole 92. Through the symmetrical eccentric holes 92 on both sides, the water flows into the conical pressurization chamber 91 and forms a vortex. The vortex drives the turbine 94 to rotate, increasing the water flow rate. Then, the water enters the screen cylinder 41 through the flow hole 93 and is then transported by the rotation of the impeller 7.

[0061] Furthermore, the balancing component 5 includes a support fixed to the top of the base 1, which is rotatably disposed outside the pump shaft 6. Ball bearings are circumferentially arranged between the support and the pump shaft 6. A through hole penetrating the inner cavity is laterally opened on the support. A circular movable groove is evenly opened around the inner wall of the through hole. An adapter seat is fitted onto the outer wall of the pump shaft 6. A guide groove is opened around the adapter seat. Ball bearings are movably embedded in the movable cavities formed by the guide groove and each movable groove. The circular arrangement of ball bearings reduces the friction during the rotation of the pump shaft 6, ensuring the stability of the pump shaft 6 during rotation.

[0062] The top of the pressurization chamber 2 has an opening, and a sealing membrane 24 covering the opening is fitted onto the top of the outer wall of the pressurization chamber 2. The sealing membrane 24 can be made of rubber, and the sealing membrane 24 is covered to the outside of the opening by an elastic rope.

[0063] With the above structure, when the water in the pressurization chamber 2 is discharged, a negative pressure is formed in the pressurization chamber 2. At this time, the sealing membrane 24 is depressed at the opening due to the pressure, and the negative pressure force generated can be observed by the degree of depression.

[0064] T-shaped limiting seats 31 are symmetrically embedded in the inner cavity of the suction chamber 3. T-shaped sliding grooves 32 are provided on both sides of the sieve cylinder 41, and the T-shaped limiting seats 31 are slidably disposed on the inner wall of the T-shaped sliding grooves 32. Two T-shaped limiting seats 31 with a T-shaped cross section are symmetrically fixedly installed on the inner wall of the suction chamber 3. The T-shaped limiting seats 31 are annular and are fixedly fitted to the inner wall of the suction chamber 3.

[0065] With the above structure, T-shaped grooves 32 are formed on both sides of the screen cylinder 41 through annular seats, so that the screen cylinder 41 rotates between two T-shaped limit seats 31 by fitting the T-shaped grooves 32 on both sides, avoiding the position displacement of the screen cylinder 41, thereby ensuring the stability of the screen cylinder 41 during rotation.

[0066] Both sides of the outer wall of the waste discharge hopper 83 are fixed with one end of a fixing rod 11, and the other end of the fixing rod 11 passes through the outer wall of the waste discharge hopper 83 and is fixed to the inner wall of the suction chamber 3. The position of the waste discharge hopper 83 is fixed by the two L-shaped fixing rods 11. The fixing rod 11 on the side of the sieve cylinder 41 at the sealing end is located at the center of the sieve cylinder 41, so that the sieve cylinder 41 fits against the outer wall of the fixing rod 11 and rotates circumferentially, avoiding interference from the fixing rod 11 during the circumferential rotation of the sieve cylinder 41.

[0067] A conveying pipe is embedded in the outer wall of the discharge chamber 4. The water passing through the discharge chamber 4 enters the equipment through the conveying pipe, thus completing the water delivery work of the centrifugal pump.

[0068] This embodiment describes an energy-saving and high-efficiency centrifugal water pump. The working principle is as follows: First, connect the connecting pipe 22 to the inlet pipe and close the valve at the same time. Then, discharge the water inside the booster chamber 2 through the water inlet pipe 21. At this time, a negative pressure is formed inside the booster chamber 2. Then, open the valve on the connecting pipe 22 and use the pressure to bring the water into the suction chamber 3.

[0069] Then, when the water flows into the suction chamber 3, it enters the conical pressurization chamber 91 through the eccentric hole 92. Through the symmetrical eccentric holes 92 on both sides, the water forms a vortex inside the conical pressurization chamber 91. The vortex drives the turbine 94 to rotate, increasing the water flow rate. After that, the water enters the screen cylinder 41 through the flow hole 93.

[0070] Then, the pump shaft 6 drives the screen cylinder 41 to rotate. After the water flows into the screen cylinder 41 through the opening, the centrifugal force generated by the rotating screen cylinder 41 adsorbs the impurities onto the circumferential inner wall of the screen cylinder 41. As the screen cylinder 41 rotates, the spray nozzle 82 carries the impurities attached to the screen cylinder 41 into the discharge hopper 83 along with the sprayed water. The sprayed water and impurities are discharged from the outside of the suction chamber 3 through the discharge pipe 84 via the discharge hopper 83.

[0071] Finally, the impeller 7 transports the filtered water through the delivery pipe into the equipment.

[0072] After the technical upgrade, the pump efficiency can be increased by 16.5%, and the current can be reduced by 13.1A, which translates to a saving of 1.14 million yuan in electricity costs per year.

[0073] 23.4A - 40.3A = 13.1A

[0074] 13.1A × 14.7kW × 0.75 yuan = 144.42 yuan / hour

[0075] 144.42 yuan / hour × 24 hours = 3466.26 yuan / day

[0076] 3466.26 yuan / day × 30 days = 103987.8 yuan / month

[0077] 103987.8 yuan / month × 11 months = 1143865.8 yuan / year

[0078] Based on practical experience, the relevant data for existing centrifugal pumps during operation are as follows:

[0079]

[0080] Based on practical experience, the relevant data for the improved centrifugal pump during operation are as follows:

[0081]

[0082] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0083] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0084] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving and high-efficiency centrifugal water pump, comprising a base (1), characterized in that: The top of the base (1) is sequentially fixed with a pressurization chamber (2), an intake chamber (3), an exhaust chamber (4), and a balance member (5). The pressurization chamber (2) is connected to the exhaust chamber (4) through the intake chamber (3). A pump shaft (6) is rotatably mounted on the balance member (5). One end of the pump shaft (6) is fixedly connected to the output shaft of the motor, and the other end of the pump shaft (6) passes through the exhaust chamber (4) and extends into the inner cavity of the intake chamber (3). An impeller (7) is sleeved on the outer wall of the pump shaft (6) located in the inner cavity of the discharge chamber (4). Guide vanes (71) are inclinedly arranged in a circumferential array on the outer wall of the impeller (7). Each guide vane (71) has a turbulence port (72), and the outer peripheral edges of every two adjacent guide vanes (71) are connected. The axial flow channel profile of the guide vane (71) is arc-shaped, and the circumferential outer wall of the guide vane (71) is arc-shaped. The inner wall of the suction chamber (3) is fitted with a rotatable screen cylinder (41) connected to the pump shaft (6). The opening of the screen cylinder (41) faces the pressurization chamber (2). The suction chamber (3) is provided with a cleaning component (8) for cleaning the screened material on the screen cylinder (41). A secondary pressurization component (9) is provided between the screen cylinder (41) and the pressurization chamber (2). The impurity removal component (8) includes a nozzle (81) embedded in the cavity of the suction chamber (3). The outer wall of the nozzle (81) is uniformly provided with nozzles (82) that spray towards the screen cylinder (41). The inner wall of the suction chamber (3) is fixedly connected to a discharge hopper (83) located in the cavity of the screen cylinder (41), and the discharge hopper (83) corresponds to the nozzles (82). The bottom of the discharge hopper (83) is fixedly connected to a discharge pipe (84) extending out of the suction chamber (3).

2. The energy-saving and high-efficiency centrifugal water pump according to claim 1, characterized in that: The bottom of the outer wall of the pressurization chamber (2) is fixedly connected to a water pipe (21) that communicates with the suction chamber (3), and the top of the outer wall of the pressurization chamber (2) is fixedly connected to a connecting pipe (22), which is equipped with a valve.

3. The energy-saving and high-efficiency centrifugal water pump according to claim 2, characterized in that: A water level indicator pipe (23) is fixedly connected to the top of the outer wall of the water inlet pipe (21).

4. The energy-saving and high-efficiency centrifugal water pump according to claim 2, characterized in that: The secondary pressurization assembly (9) includes a conical pressurization chamber (91) embedded in the inner wall of the suction chamber (3). The conical pressurization chamber (91) is located between the water inlet pipe (21) and the suction chamber (3). The outer wall of the conical pressurization chamber (91) is symmetrically provided with eccentric holes (92) that communicate with the water inlet pipe (21). The conical pressurization chamber (91) is uniformly provided with flow holes (93) on one side opposite to the screen cylinder (41). The inclined surface of the conical pressurization chamber (91) is located on the side close to the water inlet pipe (21). The inner cavity of the conical pressurization chamber (91) is rotatably provided with a turbine (94) corresponding to the eccentric hole (92).

5. The energy-saving and high-efficiency centrifugal water pump according to claim 1, characterized in that: The balancing component (5) includes a support fixed to the top of the base (1), the support is rotatably disposed outside the pump shaft (6), and ball bearings are circumferentially disposed between the support and the pump shaft.

6. The energy-saving and high-efficiency centrifugal water pump according to claim 1, characterized in that: The top of the pressurization chamber (2) has an opening, and the top of the outer wall of the pressurization chamber (2) is fitted with a sealing membrane (24) covering the opening.

7. The energy-saving and high-efficiency centrifugal water pump according to claim 1, characterized in that: The inner cavity of the inhalation chamber (3) is symmetrically embedded with a T-shaped limiting seat (31), and T-shaped grooves (32) are provided on both sides of the sieve cylinder (41). The T-shaped limiting seat (31) is slidably disposed on the inner wall of the T-shaped groove (32).

8. The energy-saving and high-efficiency centrifugal water pump according to claim 1, characterized in that: Both sides of the outer wall of the discharge hopper (83) are fixed with one end of a fixing rod (11), and the other end of the fixing rod (11) passes through the outer wall of the discharge hopper (83) and is fixed to the inner wall of the suction chamber (3).

9. The energy-saving and high-efficiency centrifugal water pump according to claim 1, characterized in that: The outer wall of the discharge chamber (4) is embedded with a conveying pipe.

Images