Flexible impeller sea water pump

Abstract

The utility model discloses a flexible impeller sea water pump which comprises a pump body internally provided with a sea water flow channel and an impeller cavity. The flexible impeller is arranged in the impeller cavity, the flexible impeller comprises a hub and a plurality of blades distributed in the circumferential direction of the hub, and the ends of the blades are embedded into a flexible material layer; the driving shaft is connected with the hub and penetrates through the pump body through a sealing assembly; the elastic modulus of the flexible material layer is smaller than that of a blade body material, and the flexible material layer is in clearance fit with the inner wall of the impeller cavity. According to the utility model, the flexible material layer at the end part of the blade is adopted, so that the flexible material layer at the end part of the blade can be well elastically deformed during use, the impact energy of seawater impurities is absorbed, the vibration and the noise are reduced, and the impact resistance and the noise reduction capability can be well improved.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a flexible impeller seawater pump. Background Technology

[0002] Traditional seawater pump impellers are mostly made of metal or hard plastic, which leads to the following problems during long-term operation:

[0003] Corrosion and cavitation issues: The salt and microorganisms in seawater can easily cause corrosion of metal impellers. Hard impellers are prone to cavitation when rotating at high speeds, which reduces their service life.

[0004] Vibration and noise: The fixed gap between the impeller and the pump body cannot adapt to the instantaneous impact caused by impurities in the seawater (such as sand and shellfish), resulting in increased vibration and seal failure.

[0005] Efficiency degradation: As wear gradually increases the clearance between the impeller and the pump body, the pump efficiency decreases significantly over time. Therefore, there is an urgent need to design a flexible impeller seawater pump to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a flexible impeller seawater pump to overcome the aforementioned shortcomings in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] Flexible impeller seawater pump, pump body, which has a seawater flow channel and impeller cavity inside;

[0009] A flexible impeller is disposed within the impeller cavity. The flexible impeller includes a hub and a plurality of blades circumferentially distributed around the hub, with the ends of the blades embedded in a flexible material layer.

[0010] A drive shaft connects to the hub and extends through the pump body via a sealing assembly;

[0011] The elastic modulus of the flexible material layer is less than that of the blade body material, and it is fitted with a clearance fit to the inner wall of the impeller cavity.

[0012] Preferably, the flexible material layer is a rubber or polyurethane composite material with a thickness of 5%-15% of the blade length.

[0013] Preferably, the inner wall of the pump body is provided with a spiral guide groove, the depth of which gradually decreases from the inlet to the outlet.

[0014] Preferably, the sealing assembly is a mechanical seal structure, including a stationary ring and a rotating ring, with the surface of the stationary ring coated with a tungsten carbide coating.

[0015] Preferably, the outer surface of the pump body is provided with an anti-corrosion layer, which is a thermally sprayed aluminum-based coating.

[0016] Preferably, the hub and the drive shaft are connected by a tapered surface and are provided with anti-loosening pins.

[0017] Preferably, the helix angle of the guide groove is 25°-40°, and the ratio of the groove width to the impeller diameter is 1:50-1:30.

[0018] Preferably, the flexible material layer is embedded with a metal wire mesh, which is welded and fixed to the end of the blade.

[0019] Preferably, the impeller cavity sidewall is provided with a wear-resistant ceramic liner with a thickness of 3-8mm.

[0020] Preferably, the blade has a gradually expanding arc shape in cross section, and the blade end is provided with a wavy groove, in which the flexible material layer is filled.

[0021] In the above technical solution, the flexible impeller seawater pump provided by this utility model (1) adopts a flexible material layer at the blade end. When in use, the flexible material layer at the blade end can perform elastic deformation well, absorb the impact energy of seawater impurities, reduce vibration and noise, and can greatly improve the ability to resist impact and reduce noise; (2) adopts a flexible material layer with a clearance fit with the inner wall of the impeller cavity. When the impeller rotates at high speed, it adaptively adheres to the pump body through centrifugal force, reduces leakage, and has a good dynamic sealing effect; (3) adopts an anti-corrosion layer. The anti-corrosion layer is composed of a thermally sprayed aluminum base coating and combined with the salt spray resistance of the flexible material to extend the service life of the pump body and impeller; (4) adopts a spiral guide groove. The spiral guide groove optimizes the water flow direction and reduces the risk of cavitation collapse on the impeller surface. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a front view structural schematic diagram of an embodiment of the flexible impeller seawater pump of this utility model.

[0024] Figure 2 A schematic diagram of the impeller structure provided for an embodiment of the flexible impeller seawater pump of this utility model.

[0025] Figure 3 A schematic diagram of the sealing assembly structure provided for an embodiment of the flexible impeller seawater pump of this utility model.

[0026] Figure 4A schematic diagram of the impeller cavity structure provided for an embodiment of the flexible impeller seawater pump of this utility model.

[0027] Figure 5 This is a partially enlarged structural schematic diagram of embodiment A of the flexible impeller seawater pump of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Pump body 11. Seawater flow channel 12. Impeller cavity 13. Spiral guide groove 14. Anti-corrosion layer 15. Wear-resistant ceramic liner 2. Flexible impeller 21. Hub 22. Blade 221. Corrugated groove 23. Flexible material layer 231. Metal wire mesh 31. Anti-loosening pin 4. Sealing assembly 41. Stationary ring 42. Dynamic ring. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1-5 As shown, the flexible impeller seawater pump provided in this embodiment of the present invention has a pump body 1, which has a seawater flow channel 11 and an impeller cavity 12 inside.

[0032] The flexible impeller 2 is disposed in the impeller cavity 12. The flexible impeller 2 includes a hub 21 and a plurality of blades 22 distributed around the hub in a circumferential direction. The ends of the blades 22 are embedded in a flexible material layer 23.

[0033] Drive shaft 3 connects to hub 21 and passes through pump body 1 via sealing assembly 4;

[0034] The elastic modulus of the flexible material layer 23 is less than that of the blade body material, and it is in clearance fit with the inner wall of the impeller cavity 12.

[0035] Specifically, in this embodiment, the pump body 1 has a seawater flow channel 11 and an impeller cavity 12 inside; a flexible impeller 2 is disposed in the impeller cavity 12, and the flexible impeller 2 includes a hub 21 and multiple blades 22 distributed circumferentially around the hub, with a flexible material layer 23 embedded at the end of the blades 22; a drive shaft 3 connects to the hub 21 and passes through the pump body 1 through a sealing assembly 4; the elastic modulus of the flexible material layer 23 is less than the elastic modulus of the blade body material, and it is in clearance fit with the inner wall of the impeller cavity 12; by using the flexible material layer at the blade end, the flexible material layer at the blade end can undergo elastic deformation well during use, absorb the impact energy of seawater impurities, reduce vibration and noise, and can greatly improve the impact resistance and noise reduction capabilities;

[0036] Preferably, the flexible material layer 23 is made of rubber or polyurethane composite material, with a thickness of 5%-15% of the blade length. The flexible material layer is fitted with the impeller cavity inner wall with a gap, and when the impeller rotates at high speed, it adaptively adheres to the pump body through centrifugal force, reducing leakage and achieving a good dynamic sealing effect.

[0037] Preferably, the inner wall of the pump body 1 is provided with a spiral guide groove 13, and the depth of the guide groove gradually decreases from the inlet to the outlet; by using the spiral guide groove, the water flow direction is optimized and the risk of cavitation collapse on the impeller surface is reduced.

[0038] In this embodiment, the sealing component 4 is a mechanical seal structure, including a stationary ring 41 and a rotating ring 42. The surface of the stationary ring is coated with a tungsten carbide coating, and the rotating ring is located inside the stationary ring.

[0039] In this embodiment, the outer surface of the pump body 1 is provided with an anti-corrosion layer 14, which is a thermally sprayed aluminum-based coating. The anti-corrosion layer is made of thermally sprayed aluminum-based coating and combined with the salt spray resistance of flexible materials to extend the service life of the pump body and impeller.

[0040] In this embodiment, the hub 21 and the drive shaft 3 are connected by a tapered surface and are provided with an anti-loosening pin 31.

[0041] In this embodiment, the helix angle of the guide groove 13 is 25°-40°, and the ratio of the groove width to the impeller diameter is 1:50-1:30.

[0042] In this embodiment, a metal mesh 231 is embedded in the flexible material layer 23, and the metal mesh is welded and fixed to the end of the blade.

[0043] In this embodiment, the impeller cavity 12 is provided with a wear-resistant ceramic liner 15 on its side wall, and the liner thickness is 3-8mm.

[0044] In this embodiment, the blade 22 has a gradually expanding arc shape in cross section, and the blade end is provided with a wavy groove 221, in which the flexible material layer 23 is filled.

[0045] Example 1

[0046] A flexible impeller seawater pump includes a pump body 1, which has a seawater flow channel 11 and an impeller cavity 12 inside; a flexible impeller 2, which is located in the impeller cavity 12, includes a hub 21 and multiple blades 22 distributed circumferentially around the hub, with a flexible material layer 23 embedded at the end of the blades 22; a drive shaft 3, which connects to the hub 21 and passes through the pump body 1 through a sealing assembly 4; the elastic modulus of the flexible material layer 23 is less than that of the blade body material, and it is clearance-fitted with the inner wall of the impeller cavity 12; by using the flexible material layer at the blade end, the flexible material layer at the blade end can undergo elastic deformation well during use, absorb the impact energy of seawater impurities, reduce vibration and noise, and can effectively improve the impact resistance and noise reduction capabilities.

[0047] Example 2

[0048] This embodiment further defines the features of Embodiment 1. The flexible material layer 23 is made of rubber or polyurethane composite material, with a thickness of 5%-15% of the blade length. The flexible material layer is fitted with the impeller cavity inner wall with a clearance, allowing it to adaptively adhere to the pump body through centrifugal force during high-speed impeller rotation, reducing leakage and providing excellent dynamic sealing. The inner wall of the pump body 1 is provided with a spiral guide groove 13, the depth of which gradually decreases from the inlet to the outlet. The spiral guide groove optimizes the water flow direction and reduces the risk of cavitation collapse on the impeller surface. The sealing assembly 4 is a mechanical seal structure, including a stationary ring 41 and a rotating ring 42. The surface of the stationary ring is coated with a tungsten carbide coating, and the rotating ring is located inside the stationary ring. The outer surface of the pump body 1 is provided with a protective seal. The corrosion layer 14 is a thermally sprayed aluminum-based coating. This corrosion-resistant layer combines the salt spray resistance of flexible materials to extend the lifespan of the pump body and impeller. The hub 21 is connected to the drive shaft 3 via a conical fit and is equipped with anti-loosening pins 31. The helix angle of the guide groove 13 is 25°-40°, and the ratio of the groove width to the impeller diameter is 1:50-1:30. A metal wire mesh 231 is embedded in the flexible material layer 23, and the metal wire mesh is welded and fixed to the blade ends. A wear-resistant ceramic liner 15 with a thickness of 3-8mm is provided on the side wall of the impeller cavity 12. The blade 22 has a gradually expanding arc cross-section, and the blade ends are provided with wavy grooves 221, in which the flexible material layer 23 fills the grooves.

[0049] Example 3

[0050] In another embodiment of this utility model, it includes a pump body 1, a flexible impeller 2, a drive shaft 3, and a sealing assembly 4.

[0051] Pump body 1: The inner wall of the impeller cavity 12 is provided with a spiral guide groove 13 with a spiral rise angle of 35° and the groove depth decreases from 3mm at the inlet to 0.5mm at the outlet. The outer surface is thermally sprayed with an aluminum-based anti-corrosion layer 14 with a thickness of 80μm.

[0052] Flexible impeller 2: The impeller diameter is 200mm, the blade 22 is a tapered arc-shaped stainless steel sheet, the end is provided with a wavy groove 221, a 12mm thick polyurethane flexible material layer 23 is embedded, accounting for 10% of the blade length, and 304 stainless steel wire mesh 231 is embedded inside and welded to the blade.

[0053] Sealing assembly 4: adopts a tungsten carbide coated mechanical seal, with a gap between the stationary ring 41 and the rotating ring 42 ≤ 0.02 mm;

[0054] Assembly relationship: The drive shaft 3 is connected to the hub 21 via a tapered surface fit, and the pin 31 has a diameter of 5mm; the side wall of the impeller cavity 12 is attached with a 6mm thick alumina ceramic liner 15.

[0055] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A flexible impeller seawater pump, characterized in that, include: The pump body (1) has a seawater flow channel (11) and an impeller cavity (12) inside. A flexible impeller (2) is disposed in the impeller cavity (12). The flexible impeller (2) includes a hub (21) and a plurality of blades (22) distributed around the hub in a circumferential direction. The ends of the blades (22) are embedded in a flexible material layer (23). The drive shaft (3) is connected to the hub (21) and passes through the pump body (1) via the sealing assembly (4); The elastic modulus of the flexible material layer (23) is less than that of the blade body material, and it is in clearance fit with the inner wall of the impeller cavity (12).

2. The flexible impeller seawater pump as described in claim 1, characterized in that: The flexible material layer (23) is a rubber or polyurethane composite material with a thickness of 5%-15% of the blade length.

3. The flexible impeller seawater pump as described in claim 1, characterized in that: The inner wall of the pump body (1) is provided with a spiral guide groove (13), and the depth of the guide groove gradually decreases from the inlet to the outlet.

4. The flexible impeller seawater pump as described in claim 1, characterized in that: The sealing assembly (4) is a mechanical seal structure, including a stationary ring (41) and a moving ring (42), with the surface of the stationary ring coated with a tungsten carbide coating.

5. The flexible impeller seawater pump as described in claim 1, characterized in that: The outer surface of the pump body (1) is provided with an anti-corrosion layer (14), which is a thermally sprayed aluminum-based coating.

6. The flexible impeller seawater pump as described in claim 1, characterized in that: The hub (21) is connected to the drive shaft (3) by a tapered surface and is provided with a locking pin (31).

7. The flexible impeller seawater pump as described in claim 3, characterized in that: The spiral angle of the guide groove (13) is 25°-40°, and the ratio of the groove width to the impeller diameter is 1:50-1:

30.

8. The flexible impeller seawater pump as described in claim 2, characterized in that: The flexible material layer (23) is embedded with a metal wire mesh (231), which is welded and fixed to the end of the blade.

9. The flexible impeller seawater pump as described in claim 1, characterized in that: The impeller cavity (12) sidewall is provided with a wear-resistant ceramic liner (15) with a thickness of 3-8mm.

10. The flexible impeller seawater pump as described in claim 1, characterized in that: The blade (22) has a gradually expanding arc shape in cross section, and the blade end is provided with a wavy groove (221), and the flexible material layer (23) is filled in the groove.

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