Anti-cavitation energy-saving centrifugal pump impeller

Abstract

The utility model relates to the technical field of centrifugal pump impellers, and discloses an anti-cavitation energy-saving centrifugal pump impeller which comprises an impeller body, a plurality of main blades which are evenly distributed are fixedly connected to the outer side wall of the impeller body, and small blades are arranged on the adjacent sides of the main blades. And a plurality of micro grooves which are uniformly distributed are formed in the surfaces of the plurality of main blades. According to the utility model, the plurality of main blades which are uniformly distributed are arranged on the surface of the impeller body, the small blades are arranged between every two main blades, and certain angles are formed between the small blades and the main blades, so that the hydrodynamic condition in an impeller runner can be effectively improved, and the cavitation phenomenon is reduced; and meanwhile, the micro grooves formed in the surfaces of the main blades can effectively improve the stability of fluid flowing, the energy consumption of operation of the impeller body is reduced, the impeller body is simple in structure and convenient to produce, manufacture and maintain in the later period, and meanwhile the anti-cavitation effect is remarkable.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pump impellers, in particular to an anti-cavitation and energy-saving centrifugal pump impeller. Background Art

[0002] A centrifugal pump is a fluid conveying machine that uses a rotating impeller to increase fluid pressure and flow rate. They are widely used in industry, agriculture, urban water supply and drainage, petrochemical industry, shipbuilding, power stations and other fields. The main components of a centrifugal pump include impeller, pump casing, pump shaft, bearings, sealing devices, etc. Cavitation is a common problem in the operation of a centrifugal pump. It occurs when the fluid pressure drops below its vapor pressure, causing bubbles to form and grow in the fluid. When these bubbles flow to the high-pressure area with the fluid, they will quickly collapse, generating high-intensity shock waves and local high temperatures. This phenomenon will cause erosion to the impeller, reduce the performance of the pump, and lead to reduced efficiency and stability of the pump.

[0003] It is known that some existing impellers attempt to reduce the impact of cavitation by changing the impeller structure, but these methods often lead to the complexity of the impeller structure, which not only increases the manufacturing and maintenance costs but also has limited anti-cavitation effects.

[0004] The utility model installs a plurality of evenly distributed main blades on the surface of the impeller body, and arranges a small blade between every two main blades, and forms a certain angle between the small blade and the main blade, thereby effectively improving the fluid dynamic conditions in the impeller flow channel and reducing the occurrence of cavitation. At the same time, the micro grooves opened on the surface of the main blades can effectively improve the stability of the fluid flow and reduce the energy consumption of the operation of the impeller body. The impeller body has a simple structure, is easy to produce and maintain in the later stage, and has a significant anti-cavitation effect. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an anti-cavitation energy-saving centrifugal pump impeller, aiming to improve the problem that the impeller structure in the existing technology is complicated, which not only increases the manufacturing and maintenance costs, but also has limited anti-cavitation effect.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an anti-cavitation energy-saving centrifugal pump impeller, comprising an impeller body, the outer side wall of the impeller body is fixedly connected with a plurality of evenly distributed main blades, the adjacent sides of the plurality of main blades are each provided with a small blade, the surfaces of the plurality of main blades are each provided with a plurality of evenly distributed micro-grooves, the middle part of the impeller body is fixedly connected with a drive shaft, the left end of the drive shaft is fixedly connected with a screw rod, the outer side wall of the screw rod is threadedly connected with a hexagonal bolt, the left end of the screw rod is provided with a guide cover, the middle left end of the guide cover is provided with an installation groove, and the left end of the impeller body is provided with a pre-rotation device.

[0007] As a further description of the above technical solution:

[0008] The pre-rotation device includes a rotating ring, which is arranged at the left end of the impeller body. The outer side wall of the rotating ring is fixedly connected with a plurality of evenly distributed flow-turbulating blades, and the inner side wall of the rotating ring is provided with a bearing.

[0009] As a further description of the above technical solution:

[0010] Adjacent sides of the plurality of small blades are all fixedly connected to the middle portion of the outer side wall of the impeller body.

[0011] As a further description of the above technical solution:

[0012] The hexagonal bolt is arranged on the inner side wall of the installation groove.

[0013] As a further description of the above technical solution:

[0014] The inner side wall of the bearing is arranged in the middle of the outer side wall of the screw rod.

[0015] As a further description of the above technical solution:

[0016] The outer side walls of the plurality of main blades are each provided with a first wear-resistant layer.

[0017] As a further description of the above technical solution:

[0018] The outer side walls of the plurality of blades are each provided with a second wear-resistant layer.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, a plurality of evenly distributed main blades are installed on the surface of the impeller body, and a small blade is arranged between every two main blades, and a certain angle is formed between the small blade and the main blade, thereby effectively improving the fluid dynamic conditions in the impeller flow channel and reducing the occurrence of cavitation. At the same time, the micro-grooves opened on the surface of the main blades can effectively improve the stability of the fluid flow and reduce the energy consumption of the impeller body operation. The impeller body has a simple structure, is easy to produce and manufacture and later maintenance, and has a significant anti-cavitation effect.

[0021] 2. In the present invention, a swivel is provided between the impeller body and the guide cover, and a plurality of evenly distributed spoiler blades are installed on the outer wall of the swivel. At the same time, a bearing is provided on the inner wall of the swivel, so that the swivel and the spoiler blades rotate under the impact of the fluid, thereby changing the inlet flow state, reducing the pressure at the inlet and reducing the cavitation tendency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a three-dimensional diagram of an anti-cavitation energy-saving centrifugal pump impeller proposed in the utility model;

[0023] Figure 2 This is a schematic diagram of the impeller body of an anti-cavitation energy-saving centrifugal pump impeller proposed in the present invention;

[0024] Figure 3 This is an enlarged view of Figure A of an anti-cavitation energy-saving centrifugal pump impeller proposed in the present invention;

[0025] Figure 4 This is a structural diagram showing the self-rotating assembly of an anti-cavitation and energy-saving centrifugal pump impeller proposed in the present invention.

[0026] Legend:

[0027] 1. Impeller body; 2. Main blades; 3. Small blades; 4. Micro grooves; 5. Drive shaft; 6. Screw; 7. Hexagonal bolts; 8. Guide cover; 9. Pre-rotation device; 901. Swivel; 902. Turbine blades; 903. Bearing; 10. Mounting groove; 11. First wear-resistant layer; 12. Second wear-resistant layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Reference Figure 1 、 Figure 2 and Figure 4 The utility model provides an embodiment: an anti-cavitation energy-saving centrifugal pump impeller, comprising an impeller body 1, the outer side wall of the impeller body 1 is fixedly connected with a plurality of evenly distributed main blades 2, the adjacent sides of the plurality of main blades 2 are each provided with a small blade 3, the surfaces of the plurality of main blades 2 are each provided with a plurality of evenly distributed micro grooves 4, the middle part of the impeller body 1 is fixedly connected with a drive shaft 5, the left end of the drive shaft 5 is fixedly connected with a screw rod 6, the outer side wall of the screw rod 6 is threadedly connected with a hexagonal bolt 7, the left end of the screw rod 6 is provided with a guide cover 8, the middle left end of the guide cover 8 is provided with a mounting groove 10, and the left end of the impeller body 1 is provided with a pre-rotation device 9; the adjacent sides of the plurality of small blades 3 are fixedly connected to the middle part of the outer side wall of the impeller body 1; the hexagonal bolt 7 is provided on the inner side wall of the mounting groove 10;

[0030] Specifically: by arranging a deflector 8 at the left end of the screw rod 6, the direct impact force of the fluid on the impeller body 1 can be reduced by the deflector 8. At the same time, by opening a mounting groove 10 at the middle left end of the deflector 8 and arranging a hexagonal bolt 7 in the mounting groove 10, the locking effect can be enhanced to prevent the deflector 8 from falling off.

[0031] Reference Figure 1 and Figure 4 The pre-rotation device 9 includes a rotating ring 901, which is arranged at the left end of the impeller body 1. The outer wall of the rotating ring 901 is fixedly connected to a plurality of evenly distributed spoiler blades 902. The inner wall of the rotating ring 901 is provided with a bearing 903; the inner wall of the bearing 903 is arranged in the middle of the outer wall of the screw rod 6;

[0032] Specifically, by fixing a plurality of evenly distributed spoiler blades 902 on the outer wall of the rotating ring 901, the rotating ring 901 and the spoiler blades 902 can rotate under the impact of the fluid to change the inlet flow state, reduce the pressure at the inlet and reduce the cavitation tendency.

[0033] Reference Figure 3 The outer side walls of the plurality of main blades 2 are all provided with a first wear-resistant layer 11 ; the outer side walls of the plurality of small blades 3 are all provided with a second wear-resistant layer 12 .

[0034] Specifically, by providing a first wear-resistant layer 11 on the outer wall of the main blade 2 and a second wear-resistant layer 12 on the outer wall of the small blade 3, the wear resistance of the impeller body 1 under cavitation conditions can be improved, thereby extending the service life of the device.

[0035] Working principle: by installing a plurality of evenly distributed main blades 2 on the surface of the impeller body 1, and providing a small blade 3 between every two main blades 2, a certain angle is formed between the small blade 3 and the main blade 2, thereby effectively improving the fluid dynamics conditions in the impeller flow channel and reducing the occurrence of cavitation. At the same time, the micro grooves 4 opened on the surface of the main blade 2 can effectively improve the stability of the fluid flow and reduce the energy consumption of the operation of the impeller body 1. The impeller body 1 has a simple structure, is easy to produce and maintain in the later stage, and has a significant anti-cavitation effect. At the same time, by providing a guide cover 8 at the left end of the screw rod 6, the direct impact force of the fluid on the impeller body 1 can be reduced by the guide cover 8. At the same time, by providing a mounting groove 10 at the left end of the middle part of the guide cover 8 and providing a hexagonal bolt 7 in the mounting groove 10, the locking effect can be enhanced to prevent the guide cover 8 from falling off.

[0036] In addition, by arranging a swivel 901 between the impeller body 1 and the guide cover 8, and installing a plurality of evenly distributed spoiler blades 902 on the outer wall of the swivel 901, and at the same time providing a bearing 903 on the inner wall of the swivel 901, the swivel 901 and the spoiler blades 902 are caused to self-rotate under the impact of the fluid, thereby changing the inlet flow state, reducing the pressure at the inlet and reducing the cavitation tendency. At the same time, by providing a first wear-resistant layer 11 on the outer wall of the main blade 2 and a second wear-resistant layer 12 on the outer wall of the small blade 3, the wear resistance of the impeller body 1 under cavitation conditions can be improved, thereby extending the service life of the device.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-cavitation energy-saving centrifugal pump impeller, comprising an impeller body (1), characterized in that: The outer side wall of the impeller body (1) is fixedly connected with a plurality of evenly distributed main blades (2), and adjacent sides of the plurality of main blades (2) are each provided with a small blade (3). The surfaces of the plurality of main blades (2) are each provided with a plurality of evenly distributed micro grooves (4). The middle part of the impeller body (1) is fixedly connected with a drive shaft (5), the left end of the drive shaft (5) is fixedly connected with a screw rod (6), the outer side wall of the screw rod (6) is threadedly connected with a hexagonal bolt (7), the left end of the screw rod (6) is provided with a guide cover (8), the left end of the middle part of the guide cover (8) is provided with a mounting groove (10), and the left end of the impeller body (1) is provided with a pre-rotation device (9).

2. The anti-cavitation energy-saving centrifugal pump impeller according to claim 1, characterized in that: The pre-rotation device (9) comprises a rotating ring (901), the rotating ring (901) being arranged at the left end of the impeller body (1), the outer side wall of the rotating ring (901) being fixedly connected with a plurality of evenly distributed flow-turbulating blades (902), and the inner side wall of the rotating ring (901) being provided with a bearing (903).

3. The anti-cavitation energy-saving centrifugal pump impeller according to claim 1, characterized in that: Adjacent sides of the plurality of small blades (3) are fixedly connected to the middle portion of the outer side wall of the impeller body (1).

4. The anti-cavitation energy-saving centrifugal pump impeller according to claim 1, characterized in that: The hexagonal bolt (7) is arranged on the inner side wall of the mounting groove (10).

5. The anti-cavitation energy-saving centrifugal pump impeller according to claim 2, characterized in that: The inner side wall of the bearing (903) is arranged in the middle of the outer side wall of the screw rod (6).

6. The anti-cavitation energy-saving centrifugal pump impeller according to claim 1, characterized in that: The outer side walls of the plurality of main blades (2) are all provided with a first wear-resistant layer (11).

7. The anti-cavitation energy-saving centrifugal pump impeller according to claim 1, characterized in that: The outer side walls of the plurality of small blades (3) are each provided with a second wear-resistant layer (12).

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