Novel centrifugal pump

Abstract

The utility model provides a novel centrifugal pump, and belongs to the field of pumps. The centrifugal pump solves the problem that the performance of the centrifugal pump is reduced due to the fact that the centrifugal pump is prone to cavitation. The novel centrifugal pump comprises a pump body with a water inlet port, a flow slowing device is arranged in the water inlet port of the pump body, the flow slowing device comprises a flow slowing cylinder, a rotating part and a plurality of blades, the blades are circumferentially and evenly distributed outside the rotating part in a spiral structure mode, each blade is provided with a plurality of thorns, and the outer portion of the tail end of the flow slowing cylinder extends outwards in the radial direction to form a connecting ring. A plurality of water passing holes are evenly distributed in the connecting ring in the circumferential direction, the connecting ring and the inner wall of a water inlet end opening of the pump body are of an integrally-formed structure, a fixing shaft is further arranged in the center of the flow slowing cylinder, the end of the fixing shaft is of a bullet structure and fixedly installed in the flow slowing cylinder through a plurality of connecting ribs, and the rotating piece is movably connected to the fixing shaft through a bearing piece. The utility model has the advantages of high efficiency and cavitation resistance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the pump field relates to a centrifugal pump especially a novel centrifugal pump. BACKGROUND

[0002] Centrifugal pump is the pump that liquid is transported by centrifugal force produced when impeller rotates. However, in certain working conditions, centrifugal pump is easy to produce cavitation phenomenon, which leads to the performance reduction of centrifugal pump, flow reduction, pressure loss increase, energy consumption increase, and the service life of impeller and blade is also greatly reduced. SUMMARY

[0003] The utility model discloses a novel centrifugal pump that can reduce cavitation to solve the above problems.

[0004] The utility model discloses a novel centrifugal pump, including the pump body with the water inlet port, its characterized in that, the water inlet port inside of pump body is provided with the slow flow device for slow flow guiding and can reduce cavitation,

[0005] The slow flow device includes a slow flow cylinder for slowing down the flow rate, a rotatable rotating member, and a plurality of blades located outside the rotating member, the plurality of blades are evenly distributed in a spiral structure on the outside of the rotating member, and each blade has a plurality of sharp points for piercing bubbles in the water flow.

[0006] The connecting ring radially extends outwardly at the end of the slow flow cylinder for flow resistance buffering, the connecting ring is integrally formed with the inner wall of the water inlet port of the pump body.

[0007] The slow flow cylinder center part is also provided with a fixed shaft, the end of the fixed shaft is in a bullet head structure, and is fixedly installed in the slow flow cylinder through a plurality of connecting ribs.

[0008] The rotating member is movably connected to the fixed shaft through a bearing member, wherein a plurality of blades are installed on the rotating member and rotate around the axis of the fixed shaft under the driving of the fluid flow rate.

[0009] In the above-mentioned novel centrifugal pump, the sharp points are conical or needle-shaped structures, the surface is treated with a nano coating, the sharp end has a curvature radius of less than 0.1 mm, and the sharp points are distributed at equal intervals along the length direction of the blade.

[0010] In the above-mentioned novel centrifugal pump, the rotating member is hollow, the weight of the plurality of blades gradually decreases from the end to the end of the rotating member, the blades are driven to rotate around the axis under the impact of the water flow, and the surface of the blades is also treated with a nano coating.

[0011] Compared with the prior art, the centrifugal pump has the following advantages:

[0012] 1. By the synergistic effect of the slow flow device and the sharp tip, the physical damage of the pump body caused by cavitation is significantly reduced, and the service life is prolonged. The high-efficiency anti-cavitation effect is realized, and the nano coating enhances the wear resistance and corrosion resistance of the sharp tip, reduces the surface adhesion, and improves the bubble piercing efficiency;

[0013] 2. The rotating part is naturally driven by water flow without external power, and the structure is simple and reliable. The water flow homogenization and dynamic rotation design reduce the turbulent vibration, reduce the operating noise and energy loss;

[0014] 3. The connecting ring is integrally formed with the pump body, which reduces the risk of leakage, improves the sealing performance and mechanical stability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the centrifugal pump.

[0016] Figure 2 is a schematic diagram of the partial cross-section structure of the water inlet port of the centrifugal pump.

[0017] Figure 3 is a schematic diagram of the rotating part of the centrifugal pump.

[0018] In the figure, 1 is the pump body; 2 is the slow flow device; 3 is the slow flow cylinder; 4 is the rotating part; 5 is the blade; 6 is the sharp tip; 7 is the connecting ring; 8 is the fixed shaft; 9 is the connecting rib; 10 is the water passage. DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the present application combined with the drawings, which further describes the technical scheme of the present application, but the present application is not limited to these embodiments.

[0020] As Figure 1 , Figure 2 , Figure 3As shown, the centrifugal pump of the new type comprises a pump body 1 with an inlet port, a flow slowing device 2 is arranged inside the inlet port of the pump body 1 for guiding and reducing cavitation, the flow slowing device 2 comprises a flow slowing cylinder 3 for slowing down the flow speed, a rotatable rotating part 4, and a plurality of blades 5 outside the rotating part 4, the plurality of blades 5 are uniformly distributed in a spiral structure outside the rotating part 4, and each blade 5 has a plurality of sharp points 6 for facilitating the piercing of bubbles in the water flow, the outer end of the flow slowing cylinder 3 radially extends outwardly and has a connecting ring 7 for blocking and buffering the flow, the connecting ring 7 is uniformly distributed with a plurality of water passing holes 10, the connecting ring 7 and the inner wall of the inlet port of the pump body 1 are integrally formed, the connecting ring 7 is integrally formed with the pump body 1, which reduces the risk of leakage, improves the sealing performance and mechanical stability, and the center of the flow slowing cylinder 3 is further provided with a fixed shaft 8, the end of the fixed shaft 8 is arranged in a bullet head structure, and the fixed shaft 8 is fixedly installed in the inside of the flow slowing cylinder 3 through a plurality of connecting ribs 9, and the rotating part 4 is movably connected to the fixed shaft 8 through a bearing part, wherein the plurality of blades 5 are installed on the rotating part 4 and rotate around the axis of the fixed shaft 8 under the driving of the fluid flow speed.

[0021] The flow slowing cylinder 3 of the inlet port slows down the water flow speed and uniformly distributes the water flow through the internal spiral blades 5 and the water passing holes 10 on the connecting ring 7, reduces the turbulent flow, and thus reduces the initial conditions of cavitation, the blades 5 on the rotating part 4 have nano-coated needle-shaped sharp points 6 (curvature radius <0.1mm), which rotate at high speed under the driving of the water flow, actively pierce the bubbles in the water, and destroy the cavitation core, the spiral structure design of the blades 5 with gradually decreasing weight at the end makes them more easily rotate under the impact of the water flow, and the bullet head flow guiding structure of the fixed shaft 8 further stabilizes the water flow direction and reduces energy loss, the integrally formed connecting ring 7 and the flow slowing cylinder 3 enhance the structural strength, and the hollow design of the rotating part 4 reduces the inertia, so that the blades 5 respond more sensitively and the bubble piercing efficiency is improved.

[0022] The sharp points 6 are conical or needle-shaped structures, the surface is treated with a nano coating, the tip curvature radius is less than 0.1mm, the sharp points 6 are distributed at equal intervals along the length direction of the blades 5, the rotating part 4 is arranged in a hollow structure, the plurality of blades 5 gradually decrease in weight from the end to the end near the outside of the rotating part 4, so as to be driven by the water flow to rotate around the circumference, and the surface of the blades 5 is also treated with a nano coating.

[0023] The cooperation of the flow slowing device 2 and the sharp points 6 significantly reduces the physical damage of cavitation to the pump body 1 and prolongs the service life. The high-efficiency anti-cavitation effect is achieved, the nano coating enhances the wear resistance and corrosion resistance of the sharp points 6, reduces the surface adhesion, and improves the bubble piercing efficiency.

[0024] The rotating part 4 is naturally driven by the water flow without external power, has a simple structure and high reliability, the water flow uniformization and dynamic rotation design reduces the turbulent vibration, reduces the operating noise and energy loss;

[0025] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0026] Although the terms are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any additional limitation by interpreting them is contrary to the spirit of the present application.

Claims

1. A new type of centrifugal pump comprising a pump body (1) with an inlet port, characterized in that, The slow flow device (2) is arranged internally at the water inlet port of the pump body (1) to guide slow flow and reduce cavitation; The slow flow device (2) comprises a slow flow cylinder (3) for slowing down flow speed, a rotatable rotating member (4), and a plurality of blades (5) arranged externally on the rotating member (4), wherein the plurality of blades (5) are arranged in a spiral structure and are circumferentially distributed on the external part of the rotating member (4), and each of the blades (5) has a plurality of sharp points (6) for facilitating the piercing of bubbles in the water flow; The slow flow cylinder (3) has a connecting ring (7) radially extending outward at the end thereof for blocking flow and buffering, wherein the connecting ring (7) has a plurality of water passing holes (10) circumferentially distributed thereon, and the connecting ring (7) is integrally formed with the inner wall of the water inlet port of the pump body (1); The slow flow cylinder (3) further has a fixed shaft (8) arranged at the center thereof, wherein the end of the fixed shaft (8) is arranged in a bullet head structure, and the fixed shaft (8) is fixedly installed in the slow flow cylinder (3) by a plurality of connecting ribs (9); The rotating member (4) is movably connected to the fixed shaft (8) by a bearing member, wherein the plurality of blades (5) are installed on the rotating member (4) and are driven to rotate circumferentially around the axis of the fixed shaft (8) by the flow speed of the fluid.

2. A new type of centrifugal pump according to claim 1, characterized in that, The sharp points (6) are in a conical or needle-like structure, and the surface thereof is treated by a nano coating, the curvature radius of the tip of the sharp points (6) is less than 0.1 mm, and the sharp points (6) are distributed at equal intervals along the length direction of the blades (5).

3. A new type of centrifugal pump as claimed in claim 1, characterized in that, The rotating member (4) is arranged in a hollow structure, the weight of the plurality of blades (5) gradually decreases from the end to the end of the external part of the rotating member (4), the blades (5) are driven to rotate circumferentially by the water flow, and the surface of the blades (5) is also treated by a nano coating.

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