Centrifugal pump built-in impeller mechanism

Abstract

The application provides a centrifugal pump built-in impeller mechanism and relates to the technical field of centrifugal pumps.The mechanism comprises a guide protrusion arranged at the center of one side of a mounting base, an axial hole is arranged at the center of the guide protrusion, a rotating curved surface wheel is fixedly connected to the mounting base, the rotating curved surface wheel and the guide protrusion are arranged at opposite sides of the mounting base, an impeller assembly comprises a cylindrical guide rod, the cylindrical guide rod is movably penetrated through the mounting base and the guide protrusion, one end of the cylindrical guide rod is provided with a shaft neck, the cylindrical guide rod is inserted between the guide protrusion and the axial hole, and the movement of the cylindrical guide rod relative to the axial hole is limited through a fastening assembly, a sleeve joint ring is detachably connected to the shaft neck, a rigid extension rod is fixedly connected to the circumferential side surface of the sleeve joint ring, an adapter plate is fixedly connected to one end of the rigid extension rod, a plurality of positioning openings are arranged at one side of the adapter plate, and the distances from the positioning openings to the center of the guide protrusion are the same or different.The application reduces the use of a shaft coupling, has a small axial length, and is conducive to integrated design and axial space saving.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, and in particular to a centrifugal pump with an internal impeller mechanism. Background Technology

[0002] The centrifugal pump impeller is the core component of the centrifugal pump. It is mounted on the pump shaft and driven to rotate by a motor or other drive device. It is a key structure for realizing fluid transportation. Its main function is to transfer the mechanical energy of the prime mover to the fluid, so that the fluid can gain kinetic and pressure energy, thereby realizing the transportation of liquid. The blades are the main working parts of the impeller. The liquid flows in the flow channel between the blades and gains energy through the pushing of the blades.

[0003] In the existing technology, the pump shaft of a centrifugal pump is connected to the drive shaft of the motor through a coupling. It is difficult to adapt the same specification of coupling to different drive shafts. In order to adapt to changes in working conditions, different motors or other drive equipment are sometimes replaced. After replacing the motor, the corresponding coupling also needs to be replaced, which is quite troublesome. Utility Model Content

[0004] In response to the above situation, this utility model provides a centrifugal pump with built-in impeller mechanism, which aims to solve the technical problem that in the prior art, the pump shaft of the centrifugal pump and the drive shaft of the motor are connected by a coupling. The coupling of the same specification is difficult to adapt to different drive shafts. In order to adapt to changes in working conditions, different motors are sometimes replaced. After replacing the motor, the corresponding coupling also needs to be replaced, which is a relatively troublesome operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a centrifugal pump with built-in impeller mechanism, including: a mounting base plate and an impeller assembly;

[0007] A guide protrusion is provided at the center of one side of the mounting base plate, and an axial hole is opened at the center of the guide protrusion; a rotating curved wheel is fixedly connected to the mounting base plate, and the rotating curved wheel and the guide protrusion are located on opposite sides of the mounting base plate;

[0008] The impeller assembly includes:

[0009] A cylindrical guide rod axially moves through the mounting base plate and the guide protrusion, and one end of the cylindrical guide rod has a journal; the cylindrical guide rod is inserted into the axial hole, and the movement of the cylindrical guide rod relative to the axial hole is restricted by a fastening assembly;

[0010] Socket, detachable connection with journal;

[0011] A rigid extension rod is fixedly connected to the circumferential side of the sleeve ring;

[0012] The adapter plate is fixedly connected to one end of the rigid extension rod; multiple positioning openings are provided on one side of the adapter plate, and the distances from these positioning openings to the center of the guide protrusion are the same or different.

[0013] In some embodiments of this utility model, the fastening assembly includes:

[0014] The operating notch is located on one side of the guide protrusion;

[0015] Nuts are used to secure the bottom of the operating notch.

[0016] The threaded rod connects to the nut and can pass through the side wall of the guide protrusion to make close contact with the outer wall of the cylindrical guide rod.

[0017] In some embodiments of this invention, the fastening assembly further includes a fixing block, through which the nut is fixed to the bottom of the operating notch.

[0018] In some embodiments of this utility model, multiple fixing blocks are evenly distributed along the circumference of the nut.

[0019] In some embodiments of this utility model, the fastening assembly further includes a limiting block connected to one end of the cylindrical guide rod, and the limiting block and the guide protrusion are located on opposite sides of the mounting base plate.

[0020] In some embodiments of this utility model, there is an interference fit between the cylindrical guide rod and the axial hole.

[0021] In some embodiments of this invention, at least two rigid extension rods are evenly distributed around the collar.

[0022] In some embodiments of this utility model, a hollow opening is provided on the mounting base plate.

[0023] In some embodiments of this utility model, side protection blocks are arranged circumferentially on the side of the mounting base plate.

[0024] In some embodiments of this utility model, there are multiple side protection blocks.

[0025] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0026] 1. The rigid extension rod, adapter plate, and positioning opening mentioned above can be regarded as a set of "adjustable short shaft / transition flange", which reduces the use of couplings, has a small axial length, and is conducive to integrated design to save axial space.

[0027] 2. This application achieves rapid assembly of the cylindrical guide rod and mounting base plate by first self-centering the cylindrical guide rod and axial hole, and then finely adjusting the centering through the positioning opening. More importantly, it ensures the coaxiality of the cylindrical guide rod during rotation, reduces vibration and noise caused by eccentric rotation, and also reduces wear between components, extending the service life of the impeller assembly.

[0028] 3. The rigid extension rod is a rigid short beam, which has high torque transmission efficiency.

[0029] 4. The distances from the center of the guide protrusion to the multiple positioning openings are the same or different, providing multiple fixing options for the connection between the adapter plate and the external drive component (motor). It can adapt to drive equipment of different specifications and mounting hole positions, greatly enhancing the versatility of the impeller assembly. At the same time, the design of multiple positioning openings also makes the connection more secure and the transmission more stable.

[0030] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0034] Figure 3 This is a side view of the structure of this utility model;

[0035] Figure 4 For the present utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0036] Icons: 1-Mounting base plate, 2-Guide protrusion, 3-Impeller mechanism, 301-Cylindrical guide rod, 302-Sleeve ring, 303-Rigid extension rod, 304-Adapter plate, 305-Side protection block, 306-Limit block, 307-Rotating curved wheel, 308-Hollow opening, 309-Fixing block, 310-Nut, 311-Threaded rod, 312-Operating notch, 313-Axial hole, 314-Positioning opening, 315-Junior journal. Detailed Implementation

[0037] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0038] In the description of the embodiments of this utility model, it should be understood that the terms "center", "length", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 limitations on the embodiments of this utility model.

[0039] Furthermore, the term "multiple" means two or more, unless otherwise explicitly specified.

[0040] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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 direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0041] The embodiments of this utility model will be described in detail below.

[0042] Example 1

[0043] See Figures 1-4 This embodiment provides a centrifugal pump with a built-in impeller mechanism, including a mounting base plate 1 and an impeller assembly 3 disposed on the mounting base plate 1.

[0044] A guide protrusion 2 is provided at the center of one side of the mounting base plate 1, and an axial hole 313 is provided at the center of the guide protrusion 2. A rotating curved wheel 307 is fixedly connected to the mounting base plate 1, and the rotating curved wheel 307 and the guide protrusion 2 are located on opposite sides of the mounting base plate 1. A hollow opening 308 is provided on the mounting base plate 1, and the shape, size and position of the hollow opening 308 are not limited.

[0045] The impeller assembly 3 includes a cylindrical guide rod 301, a sleeve ring 302, a rigid extension rod 303, and an adapter plate 304.

[0046] The cylindrical guide rod 301 axially moves through the mounting base plate 1 and the guide protrusion 2, and one end of the cylindrical guide rod 301 has a journal; the cylindrical guide rod 301 is inserted into the axial hole 313 (interference fit), and the movement of the cylindrical guide rod 301 relative to the axial hole 313 is restricted by the fastening assembly.

[0047] The collar 302 is detachably connected to the journal (such as a threaded connection).

[0048] The rigid extension rod 303 is fixedly connected to the circumferential side of the sleeve ring 302, and at least two rigid extension rods 303 are evenly distributed around the sleeve ring 302.

[0049] The adapter plate 304 is fixedly connected to one end of the rigid extension rod 303. A plurality of positioning openings 314 are provided on one side of the adapter plate 304, and the distances from these positioning openings 314 to the center of the guide protrusion 2 may be the same or different.

[0050] In use, the cylindrical guide rod 301 is aligned with the axial hole 313 on the guide protrusion 2 to achieve insertion. The cylindrical guide rod 301 is axially adjusted to a suitable position. The impeller assembly 3 is connected and fixed to the external drive component through the multiple positioning openings 314 on the adapter plate 304 (for example, a flange plate is installed on the motor drive shaft, and the adapter plate 304 is connected to the flange plate through the positioning openings 314). Subsequently, the movement of the cylindrical guide rod 301 relative to the axial hole 313 is restricted by the fastening component. The sleeve ring 302 is connected to the adapter plate 304 through the rigid extension rod 303, and the installation distance can be flexibly adapted according to the position of the drive component. After the external drive component is started, the rigid extension rod 303, the sleeve ring 302 and the cylindrical guide rod 301 are driven to rotate through the adapter plate 304, which in turn drives the rotating curved wheel 307 on the mounting base plate 1 to rotate to transport fluid. If it is necessary to adjust the position of the impeller assembly 3 relative to the mounting base plate 1, simply release the fastening assembly from the restriction on the cylindrical guide rod 301 to move the cylindrical guide rod 301 and other components of the impeller assembly 3.

[0051] In summary, compared with conventional flexible couplings, this embodiment has at least the following beneficial effects:

[0052] 1. The rigid extension rod 303, adapter plate 304, and positioning opening 314 mentioned above can be regarded as a set of "adjustable short shaft / transition flange", which reduces the use of couplings, has a small axial length, and is conducive to integrated design to save axial space.

[0053] 2. This application achieves rapid assembly of the cylindrical guide rod 301 and the mounting base plate 1 by first self-centering the cylindrical guide rod 301 and the axial hole 313, and then finely adjusting the alignment through the positioning opening 314. More importantly, it ensures the coaxiality of the cylindrical guide rod 301 during rotation, reduces vibration and noise caused by eccentric rotation, and also reduces wear between components, extending the service life of the impeller assembly 3.

[0054] 3. The rigid extension rod 303 is a rigid short beam with high torque transmission efficiency.

[0055] 4. The distances from the center of the multiple positioning openings 314 to the center of the guide protrusion 2 are the same or different, providing multiple fixing options for the connection between the adapter plate 304 and the external drive component (motor). This allows it to adapt to drive equipment of different specifications and mounting hole positions, greatly enhancing the versatility of the impeller assembly 3. At the same time, the design of multiple positioning openings 314 also makes the connection more robust and the transmission more stable.

[0056] 5. The mounting base plate 1 has a hollow opening 308. During rotation, fluid can pass through the hollow opening 308 to optimize the fluid flow path.

[0057] Example 2

[0058] This embodiment is one implementation of the fastening component.

[0059] See Figures 1-4 The fastening assembly includes a fixing block 309, a nut 310, a threaded rod 311, and a limiting block 306.

[0060] An operating notch 312 is provided on one side of the guide protrusion 2, and a fixing block 309 is disposed within the operating notch 312. Multiple (2) fixing blocks 309 are evenly distributed along the circumference of the nut 310.

[0061] Nut 310 is located at the bottom of operating notch 312 and is fixed to the bottom of operating notch 312 by fixing block 309.

[0062] The threaded rod 311 is connected to the nut 310 and can pass through the side wall of the guide protrusion 2 to make close contact with the outer wall of the cylindrical guide rod 301. A strip groove is formed on the cylindrical guide rod 301, and the length direction of the strip groove is parallel to the axial direction of the cylindrical guide rod 301. The end of the threaded rod 311 can extend into the strip groove.

[0063] The limiting block 306 is connected to one end of the cylindrical guide rod 301, and the limiting block 306 and the guide protrusion 2 are located on opposite sides of the mounting base plate 1.

[0064] Tightening the threaded rod 311 restricts the movement of the cylindrical guide rod 301 relative to the axial hole 313; loosening the threaded rod 311 releases the restriction of the fastening assembly on the cylindrical guide rod 301, making it easier to move components such as the cylindrical guide rod 301 of the impeller assembly 3, resulting in high ease of operation.

[0065] The operating notch 312 provides ample space for adjusting the threaded rod 311, and the fixing block 309 provides a stable support point for the nut 310. Multiple (2) fixing blocks 309 are evenly distributed along the circumference of the nut 310, which can evenly distribute the force on the nut 310 to the guide protrusion 2, preventing the nut 310 from tilting or loosening due to uneven force, ensuring the stability of the threaded rod 311 during the locking process, and also improving the load-bearing capacity of the entire fixing structure to adapt to the vibration environment during the operation of the centrifugal pump.

[0066] Example 3

[0067] This embodiment is an improvement on embodiment 1 or 2.

[0068] See Figures 1-4 Multiple side protection blocks 305 are arranged circumferentially on the side of the mounting base plate 1. The side protection blocks 305 can form a three-dimensional radial impact-resistant protective barrier when the impeller assembly 3 is running at high speed, so as to prevent impurities from radially impacting the rotating curved wheel 307.

[0069] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A centrifugal pump with a built-in impeller mechanism, characterized in that, This includes mounting base plate and impeller assembly; A guide protrusion is provided at the center of one side of the mounting base plate, and an axial hole is provided at the center of the guide protrusion; a rotating curved wheel is fixedly connected to the mounting base plate, and the rotating curved wheel and the guide protrusion are located on opposite sides of the mounting base plate; The impeller assembly includes: A cylindrical guide rod axially extends through the mounting base plate and the guide protrusion, and one end of the cylindrical guide rod has a journal; the cylindrical guide rod is inserted into the axial hole, and the movement of the cylindrical guide rod relative to the axial hole is restricted by a fastening assembly; A collar is detachably connected to the journal. A rigid extension rod is fixedly connected to the circumferential side of the sleeve ring; An adapter plate is fixedly connected to one end of the rigid extension rod; a plurality of positioning openings are provided on one side of the adapter plate, and the distances from these positioning openings to the center of the guide protrusion are the same or different.

2. The centrifugal pump with built-in impeller mechanism according to claim 1, characterized in that, The fastening assembly includes: An operating notch is provided on one side of the guide protrusion; A nut is used to secure the bottom of the operating notch; The threaded rod is connected to the nut and can pass through the side wall of the guide protrusion and make close contact with the outer wall of the cylindrical guide rod.

3. The centrifugal pump with built-in impeller mechanism according to claim 2, characterized in that, The fastening assembly also includes a retaining block, through which the nut is secured to the bottom of the operating notch.

4. The centrifugal pump with built-in impeller mechanism according to claim 3, characterized in that, The plurality of fixing blocks are evenly distributed along the circumference of the nut.

5. The centrifugal pump with built-in impeller mechanism according to claim 2, characterized in that, The fastening assembly also includes a limiting block connected to one end of the cylindrical guide rod, and the limiting block and the guide protrusion are located on opposite sides of the mounting base plate.

6. The centrifugal pump with built-in impeller mechanism according to claim 1, characterized in that, The cylindrical guide rod is interference-fitted with the axial hole.

7. The centrifugal pump with built-in impeller mechanism according to claim 1, characterized in that, At least two of the rigid extension rods are evenly distributed around the collar.

8. The centrifugal pump with built-in impeller mechanism according to claim 1, characterized in that, The mounting base plate has a hollowed-out opening.

9. The centrifugal pump with built-in impeller mechanism according to any one of claims 1-8, characterized in that, Side protection blocks are arranged circumferentially on the sides of the mounting base plate.

10. The centrifugal pump with built-in impeller mechanism according to claim 9, characterized in that, There are multiple side protection blocks.

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