A submersible full-flow pump with adjustable blade angle

Abstract

This utility model discloses a submersible full-flow pump with adjustable blade angle, including a guide vane body. A rotor sleeve is installed at the left end of the guide vane body, and a water inlet horn is installed at the left end of the rotor sleeve. A wet stator assembly is provided on the outside of the rotor sleeve, and a rotor core is installed on the outside of the wet stator assembly. The rotor core is connected to the rotor sleeve. By adopting a labyrinth seal structure for the guide vane body, the water inlet horn, and the rotor sleeve, the possibility of foreign matter entering the motor cavity can be avoided, effectively ensuring the service life of the wet motor windings. By changing the connection between the outer circle of the blade and the rotor sleeve from cylindrical to spherical, and also changing the connection between the inner circle of the blade and the outer circle of the hub from cylindrical to spherical, the blade can rotate along the blade axis within two corresponding spherical bodies. This achieves the purpose of arbitrarily adjusting the blade angle as needed, and also allows the blade to be replaced individually according to the wear condition.

Description

Technical Field

[0001] This utility model relates to the field of water pump and hydraulic machinery technology, and in particular to a submersible full-flow pump with adjustable blade angle. Background Technology

[0002] The submersible full-flow pump is designed for submersible operation. The matching motor adopts wet motor technology and uses special water-resistant winding wire, which effectively avoids the impact of motor cavity leakage on the insulation performance of the motor winding. The stator and enameled wire of the motor are completely submerged in water. The pump impeller is installed in the inner cavity of the rotor and forms an integral part with the rotor, which greatly shortens the axial length of the pump and makes the overall structure of the pump more compact. When the pump is working, the water flows through the inner cavity of the rotor. The water flow is straight in and straight out, with smooth flow path and high pump unit efficiency.

[0003] In conventional submersible axial flow pumps, the impeller and rotor are integral, and the connection between the outer diameter of the impeller and the inner bore of the rotor is welded. As a vulnerable part, the blades cannot be replaced individually, nor can the blade angle be readjusted according to the pump performance test results or actual field requirements. Therefore, to address the above issues, a submersible axial flow pump with adjustable blade angle is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model overcomes the existing defects and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A submersible full-flow pump with adjustable blade angle includes a guide vane body, a rotor sleeve installed at the left end of the guide vane body, an inlet horn installed at the left end of the rotor sleeve, a wet stator assembly provided on the outside of the rotor sleeve, a rotor core installed on the outside of the wet stator assembly and connected to the rotor sleeve, a cover plate installed at the left edge of the rotor sleeve, and an impeller body provided on the inside of the rotor sleeve.

[0007] As a further improvement of this utility model, the impeller body includes a threaded cylindrical pin, a double-ended stud, a cylindrical head screw, a blade, a cylindrical pin, a hub, and a blade retaining ring. One end of the inner side of the impeller sleeve is fitted with a blade via a double-ended stud, and the other end of the inner side of the impeller sleeve is connected to the blade via a threaded cylindrical pin. The other end of the blade is connected to the hub via a cylindrical pin. A blade retaining ring is installed inside the hub. One end of the outer side of the blade retaining ring is connected to the blade via a double-ended stud. The cover plate is connected to the impeller sleeve via a cylindrical head screw.

[0008] As a further improvement of this utility model, the rotor core is connected to the outside of the rotor sleeve by a heat-shrinking process and a long key fixing method, and both the wet stator assembly and the rotor core can be in direct contact with water.

[0009] As a further improvement of this utility model, the connection between the water inlet horn and the impeller sleeve and the connection between the guide vane body and the impeller sleeve both adopt a labyrinth seal structure design.

[0010] As a further improvement of this utility model, the outer circular surface of the blade in contact with the rotor sleeve is spherical, the inner surface of the rotor sleeve that mates with the outer spherical surface of the blade is also spherical, the inner circular surface of the blade in contact with the hub is spherical, and the outer surface of the hub that mates with the inner spherical surface of the blade is also spherical.

[0011] Compared with the prior art, the present invention has the following beneficial effects: by adopting a labyrinth seal structure for the guide vane body, the water inlet horn, and the impeller sleeve, the possibility of foreign matter entering the motor cavity can be avoided, effectively ensuring the service life of the wet motor windings. By changing the connection between the outer circle of the blade and the impeller sleeve from a cylindrical shape to a spherical shape, and at the same time changing the connection between the inner circle of the blade and the outer circle of the hub from a cylindrical shape to a spherical shape, the blade can rotate along the axis of the blade within two corresponding spherical bodies, achieving the purpose of arbitrarily adjusting the blade angle as needed, and also allowing the blade to be replaced individually according to the wear condition. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0013] Figure 1 This is a schematic cross-sectional view of the overall structure of a submersible full-flow pump with adjustable blade angle according to this utility model.

[0014] Figure 2 This is a cross-sectional structural schematic diagram of a submersible full-flow pump impeller sleeve with adjustable blade angle according to this utility model.

[0015] In the diagram: 1. Guide vane body; 2. Wet stator assembly; 3. Rotor core; 4. Impeller body; 5. Runner sleeve; 6. Cover plate; 7. Inlet horn; 11. Threaded cylindrical pin; 12. Double-ended stud; 13. Cylindrical head screw; 14. Blade; 15. Cylindrical pin; 16. Hub; 17. Blade retaining ring. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1

[0018] like Figure 1-2 As shown, a submersible full-flow pump with adjustable blade angle includes a guide vane body 1. A rotor sleeve 5 is installed at the left end of the guide vane body 1, and a water inlet horn 7 is installed at the left end of the rotor sleeve 5. A wet stator assembly 2 is provided on the outside of the rotor sleeve 5, and a rotor core 3 is installed on the outside of the wet stator assembly 2 and connected to the rotor sleeve 5. A cover plate 6 is installed on the left edge of the rotor sleeve 5, and an impeller body 4 is provided on the inside of the rotor sleeve 5. The impeller body 4 includes a threaded cylindrical pin 11, a double-ended stud 12, a cylindrical head screw 13, blades 14, cylindrical pins 15, and a hub 1. The rotor sleeve 5 has a blade 14 mounted on one end of its inner side via a double-ended stud 12, and the other end of its inner side is connected to the blade 14 via a threaded cylindrical pin 11. The other end of the blade 14 is connected to a hub 16 via a cylindrical pin 15. The blade fixing ring 17 is mounted on the inner side of the hub 16. The outer end of the blade fixing ring 17 is connected to the blade 14 via a double-ended stud 12. The cover plate 6 is connected to the rotor sleeve 5 via a cylindrical head screw 13. By connecting the cover plate 6 to the rotor sleeve 5 via a cylindrical head screw 13, disassembly is made more convenient.

[0019] Furthermore, such as Figure 1-2 As shown, the rotor core 3 is connected to the outside of the rotor sleeve 5 by a heat-shrinking process and a long key fixing method. Both the wet stator assembly 2 and the rotor core 3 can be in direct contact with water. By connecting the rotor core 3 to the outside of the rotor sleeve 5 by a heat-shrinking process and a long key fixing method, both the wet stator assembly 2 and the rotor core 3 can be in direct contact with water, which can ensure the reliability of high-speed underwater operation and improve its heat dissipation conditions.

[0020] Furthermore, such as Figure 1-2As shown, the connection between the water inlet horn 7 and the rotor sleeve 5, and the connection between the guide vane body 1 and the rotor sleeve 5, are all designed with a labyrinth seal structure. By making the connection between the cover plate 6 and the water inlet horn 7, and the connection between the guide vane body 1 and the rotor sleeve 5, a labyrinth seal structure can be used to prevent debris from entering the stator chamber and to prevent the possibility of the electronic wire coils from getting tangled and damaged.

[0021] Furthermore, such as Figure 1-2 As shown, the outer circular surface of the blade 14 that contacts the rotor sleeve 5 is spherical, and the inner surface of the rotor sleeve 5 that mates with the outer spherical surface of the blade 14 is also spherical. The inner circular surface of the blade 14 that contacts the hub 16 is spherical, and the outer surface of the hub 16 that mates with the inner spherical surface of the blade 14 is also spherical. By changing the surfaces of the blade 14 that contact the rotor sleeve 5 and the surfaces that contact the hub 16 to be spherical, the function of adjustable blade angle can be achieved.

[0022] Blade replacement and angle adjustment principle: Use a special tool to remove the cylindrical head screw 13, open the cover plate 6 to expose the double-ended stud 12 inside the rotor sleeve 5, loosen the double-ended stud 12 inside the rotor sleeve 5, and then unscrew the threaded cylindrical pin 11. Control the impeller body 4 to move to the right so that there is enough space at the end of the blade 14 for subsequent operations. Loosen the nut of the double-ended stud 12 on the blade fixing ring 17, pull the blade 14 outward until the cylindrical pin 15 is exposed, and pull out the cylindrical pin 15. Because the inner and outer end faces of the blade 14 are spherical, the blade 14 can rotate along any axis of the center of the two corresponding spheres. Therefore, rotate the blade 14 to the appropriate angle. When replacing it, simply loosen the double-ended stud 12 on the blade fixing ring 17.

[0023] The above are preferred embodiments of the present invention. The basic principles, main features, and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope thereof. All such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A submersible full-flow pump with adjustable blade angle, comprising guide vane body (1), characterized in that: A rotor sleeve (5) is installed on the left end of the guide vane body (1). A water inlet horn (7) is installed on the left end of the rotor sleeve (5). A wet stator assembly (2) is provided on the outside of the rotor sleeve (5). A rotor core (3) is installed on the outside of the wet stator assembly (2). The rotor core (3) is connected to the rotor sleeve (5). A cover plate (6) is installed on the left edge of the rotor sleeve (5). An impeller body (4) is provided on the inside of the rotor sleeve (5).

2. The submersible full-flow pump with adjustable blade angle according to claim 1, characterized in that: The impeller body (4) includes a threaded cylindrical pin (11), a double-ended stud (12), a cylindrical head screw (13), a blade (14), a cylindrical pin (15), a hub (16), and a blade retaining ring (17). One end of the inner side of the impeller sleeve (5) is fitted with a blade (14) via a double-ended stud (12), and the other end of the inner side of the impeller sleeve (5) is connected to the blade (14) via a threaded cylindrical pin (11). The other end of the blade (14) is connected to the hub (16) via a cylindrical pin (15). The blade retaining ring (17) is installed inside the hub (16), and one end of the outer side of the blade retaining ring (17) is connected to the blade (14) via a double-ended stud (12). The cover plate (6) is connected to the impeller sleeve (5) via a cylindrical head screw (13).

3. The submersible full-flow pump with adjustable blade angle according to claim 1, characterized in that: The rotor core (3) is connected to the outside of the rotor sleeve (5) by a heat-shrinking process and a long key fixing method, and both the wet stator assembly (2) and the rotor core (3) can be in direct contact with water.

4. A submersible full-flow pump with adjustable blade angle according to claim 1, characterized in that: The connection between the water inlet horn (7) and the impeller sleeve (5) and the connection between the guide vane body (1) and the impeller sleeve (5) both adopt a labyrinth seal structure design.

5. A submersible full-flow pump with adjustable blade angle according to claim 2, characterized in that: The outer circular surface of the blade (14) that contacts the wheel sleeve (5) is spherical, and the inner surface of the wheel sleeve (5) that mates with the outer spherical surface of the blade (14) is also spherical. The inner circular surface of the blade (14) that contacts the hub (16) is spherical, and the outer surface of the hub (16) that mates with the inner spherical surface of the blade (14) is also spherical.

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