High-pressure synergistic impeller suitable for multi-stage centrifugal pump

Abstract

The utility model relates to a high-pressure synergistic impeller suitable for a multi-stage centrifugal pump, which comprises a diffuser, diffusion blades arranged in the middle of the diffuser, centrifugal fan blades arranged in the diffuser, an adjusting mechanism fixed on the side surface of the diffuser, and a line pipe fixed on the side surface of the adjusting mechanism. The blade angle of the diffuser can be adjusted, the diffuser has good adaptability to fluids with different viscosities, and kinetic energy of the fluids can be converted into pressure energy to the maximum extent under the condition that it is ensured that flow separation and vortexes are reduced; by adjusting the blades of the diffuser, the device not only can pressurize water, but also has a better pressurizing effect on oil substances, and can obtain higher lift.

Description

Technical Field

[0001] This utility model relates to the field of booster pump structure, and in particular to a high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps. Background Technology

[0002] Multistage centrifugal pumps, as highly efficient fluid transport devices, are widely used in petrochemical, water conservancy, and power systems. They convert the kinetic energy of fluids into pressure energy through the high-speed rotation of multistage impellers, achieving high-head transport. However, the diffuser blade angles of existing centrifugal pumps are typically fixed, making dynamic adjustment based on changes in fluid viscosity difficult. When handling high-viscosity fluids (such as oils), fixed blades can easily lead to fluid flow separation and eddy currents, reducing energy conversion efficiency and even causing insufficient head. Furthermore, if the fluid flow path within the diffuser does not match the blade angle during the high-speed rotation of the multistage impellers, it will exacerbate flow resistance and increase energy loss. Especially for different media (such as water and oil), fixed blades cannot simultaneously achieve the optimal flow characteristics for both, leading to a decline in overall performance. Existing solutions still have some shortcomings in addressing this issue. For example, patent CN222208392U discloses a double-acting multi-stage booster vane pump. The core technology of this double-acting multi-stage booster vane pump is to set up multiple inlets and multiple vanes in cooperation. By selecting different inlets through a sealing mechanism, liquids of different viscosities can be pumped and transported using the corresponding number of vanes, thereby improving the liquid transport efficiency. However, it still has the following shortcomings: when transporting different liquids, the number of vanes through which the liquid passes varies, resulting in significant changes in head, and it cannot adapt well to liquids of different viscosities. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention aims to provide a high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps. It solves the problems existing in the prior art by adjusting the diffuser blade angle in real time through an adjustment mechanism, dynamically matching the blade angle with the fluid viscosity, reducing flow separation and eddies, and improving the pressurization capacity for multiple media. The adjustable diffuser blade angle allows the fluid flow within the diffuser to better conform to the blade profile, reducing flow resistance and maximizing the conversion of kinetic energy into pressure energy, thus improving energy conversion efficiency. A screw motor-driven internal gear transmission mechanism enables electric and precise adjustment of the blade angle, simplifying maintenance procedures and enhancing the intelligence and reliability of the equipment.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps, comprising a diffuser, diffuser blades installed in the middle of the diffuser, centrifugal fan blades installed inside the diffuser, an adjustment mechanism fixed to the side of the diffuser, and a conduit fixed to the side of the adjustment mechanism.

[0007] The adjustment mechanism includes a first connecting rod mounted on the diffuser blade, a second connecting rod mounted at the end of the first connecting rod, a fixed block mounted at the end of the second connecting rod, an internal gear ring gear bolted inside the fixed block, a drive gear meshing with the internal gear ring gear, and a screw motor fixed at the lower end of the drive gear.

[0008] Preferably, cylindrical shafts are provided at both ends of the diffuser blades, and square shafts are provided at the connection between the cylindrical shafts and the first connecting rod.

[0009] Preferably, the upper end of the fixing block is provided with a connecting groove, and a locking rod is inserted into the connecting groove.

[0010] Preferably, the lower end of the fixing block is provided with a wing plate, and the wing plate is provided with a through hole.

[0011] Preferably, the back of the internal gear ring is provided with a pair of threaded holes.

[0012] (III) Beneficial Effects

[0013] The purpose of this invention is to provide a high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps. Through the coordinated design of adjustable diffuser blades and electric drive mechanism, the multi-stage centrifugal pump achieves efficient pressurization of fluids with different viscosities. Dynamically adjusting the blade angle can effectively reduce fluid flow separation and eddies, significantly improve energy conversion efficiency, and reduce flow resistance by precisely controlling the flow channel matching in the diffuser. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0015] Figure 2 This is a schematic diagram of the adjustment mechanism in this utility model.

[0016] Figure 3 This is a schematic diagram of the diffuser blade in this utility model.

[0017] Figure 4 This is a schematic diagram of the fixing block in this utility model.

[0018] Figure 5 This is a schematic diagram of the internal gear ring in this utility model.

[0019] In the diagram: 1-Diffuser, 2-Diffuser blade, 201-Cylindrical shaft, 202-Square shaft, 3-Centrifugal fan blade, 4-Adjusting mechanism, 401-First connecting rod, 402-Second connecting rod, 403-Fixing block, 404-Internal gear ring, 4041-Threaded hole, 405-Driving gear, 406-Screw motor, 407-Connecting groove, 408-Locking rod, 409-Wing plate, 410-Through hole, 5-Conduit. Detailed Implementation

[0020] The following will refer to the appendix in the example of this utility model. Figure 1 - Appendix Figure 5 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figure 1 As shown, this utility model provides a technical solution: a high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps, including a diffuser 1, diffuser blades 2 installed in the middle of the diffuser 1, centrifugal fan blades 3 installed inside the diffuser 1, an adjustment mechanism 4 fixed to the side of the diffuser 1, and a conduit 5 fixed to the side of the adjustment mechanism 4. The diffuser 1 is non-rotating and is used to collect the fluid thrown out by the centrifugal fan blades 3, convert the kinetic energy of the fluid into pressure energy, and guide the fluid to the outlet. This causes the fluid to decelerate and pressurize within the diffuser 1, increasing the pressure energy of the fluid, reducing the turbulence of the fluid flow, optimizing the fluid flow path, and improving the energy conversion efficiency of the centrifugal pump. The diffuser blades 2 are installed in the middle of the diffuser 1. By changing the blade angle, the flow channel shape within the diffuser 1 is adjusted to adapt to the flow characteristics of fluids with different viscosities. The blade angle is adjusted in real time according to the fluid viscosity, making the fluid flow within the diffuser 1 more closely conform to the blade profile, reducing flow separation and eddies, lowering flow resistance, improving energy conversion efficiency, and enhancing the centrifugal pump's pressurization capability for different media. Centrifugal fan blade 3 is fixed to the motor shaft and rotates with it. Centrifugal force propels the fluid from near the shaft towards diffuser 1, giving the fluid kinetic energy. It is the direct component of the centrifugal pump that generates centrifugal force, initially accelerating the fluid and providing a foundation for the subsequent pressurization process in diffuser 1. Existing technologies have mature solutions for centrifugal fan blade 3, so they will not be described here. Adjustment mechanism 4 is installed on the side of diffuser 1 and is used to adjust the angle of diffuser blades 2, achieving adaptive adjustment for fluids of different viscosities. Precise adjustment of the diffuser blade angle is achieved through an electric drive mechanism, enabling the centrifugal pump to automatically adjust its operating state according to the fluid characteristics, improving pump efficiency and adaptability. Conduit 5 is fixed to the side of adjustment mechanism 4 to protect and organize the wires connecting to adjustment mechanism 4.

[0022] like Figure 2 As shown, the adjustment mechanism 4 includes a first connecting rod 401 mounted on the diffuser blade 2, a second connecting rod 402 mounted at the end of the first connecting rod 401, a fixing block 403 mounted at the end of the second connecting rod 402, an internal gear ring gear 404 bolted inside the fixing block 403, a drive gear 405 meshing with the internal gear ring gear 404, and a screw motor 406 fixed at the lower end of the drive gear 405. The screw motor 406 has self-locking properties, which ensures the stability of the diffuser blade 2 under high-speed fluid impact when driving the device, and ensures that the diffuser blade 2 can be locked after being adjusted to a set angle without the need for the motor to continuously work to lock the diffuser blade 2. The drive gear 405 meshes with the internal gear ring gear 404 and is driven by the screw motor 406, transmitting the rotational motion of the screw motor 406 to the internal gear ring gear 404. The internal gear ring 404 is bolted inside the fixed block 403 and meshes with the drive gear 405. Its rotation drives the first connecting rod 401 and the diffuser blade 2 to rotate, thus adjusting the angle of the diffuser blade 2. The rotational motion of the drive gear 405 is converted into the angle adjustment motion of the diffuser blade 2; its number of teeth and transmission ratio determine the accuracy and range of the diffuser blade angle adjustment. As the fixed block 403 rotates with the internal gear ring 404, it drives the second connecting rod 402 to move. Simultaneously, the second connecting rod 402 pushes and pulls the end of the first connecting rod 401, causing the first connecting rod 401 to rotate the diffuser blade 2.

[0023] like Figure 3 As shown, cylindrical shafts 201 are provided at both ends of the diffuser blade 2, and a square shaft 202 is provided at the connection between the cylindrical shafts 201 and the first connecting rod 401. The cylindrical shafts 201 are located at both ends of the diffuser blade 2, providing rotational support for the diffuser blade 2, allowing the diffuser blade 2 to rotate around its axis. This ensures the rotational flexibility of the diffuser blade 2, allowing the blade to adjust its angle as needed to adapt to different working conditions. The square shaft 202 is located at the connection between the cylindrical shaft 201 and the first connecting rod 401, connecting the first connecting rod 401 and transmitting the driving force of the adjusting mechanism 4, enabling the diffuser blade 2 to rotate. This realizes the power transmission between the adjusting mechanism 4 and the diffuser blade 2, ensuring that the diffuser blade 2 can accurately adjust its angle according to the instructions of the adjusting mechanism 4.

[0024] like Figure 4 As shown, a connecting groove 407 is provided on the upper end of the fixing block 403, and a locking rod 408 is inserted into the connecting groove 407; the connecting groove 407 is used to install the second connecting rod 402, and the locking rod 408 is used to fix the second connecting rod 402 to the fixing block 403.

[0025] like Figure 4As shown, a wing plate 409 is provided at the lower end of the fixing block 403, and a through hole 410 is provided on the wing plate 409; the wing plate 409 is used to fix the internal gear ring gear 404, and the through hole 410 is used to pass a bolt, so that the bolt meshes with the threaded hole 4041, ensuring that the internal gear ring gear 404 is fixed on the fixing block 403.

[0026] like Figure 5 As shown, the internal gear ring 404 has a pair of threaded holes 4041 on its back side; the threaded holes 4041 are used to fix the internal gear ring 404 to the wing plate 409.

[0027] Working principle:

[0028] After the liquid enters, it undergoes centrifugal action by the centrifugal fan blade 3, and then through the diffuser blade 2, its kinetic energy is converted into pressure energy. After multiple stages of pressurization, it enters the next stage and is discharged after further pressurization.

[0029] When encountering liquids with different viscosities, it is often necessary to adjust the angle of the diffuser blade 2. (Low-viscosity fluids have low flow resistance, and a larger diffusion angle (such as 8°~12°) can more effectively convert kinetic energy into pressure energy while reducing the risk of flow separation. When high-viscosity fluids flow, frictional resistance increases significantly, and an excessively large diffusion angle will exacerbate flow separation and eddies, leading to a sharp increase in energy loss. Studies have shown that the optimal diffusion angle for high-viscosity fluids may be reduced to 6°~8°.) At this time, the screw motor 406 starts to rotate, driving the internal gear 404 to rotate. Because the fixed block 403 is fixed on the internal gear 404, it will rotate together with the internal gear 404. When the fixed block 403 rotates, it will drive the end of the second connecting rod 402 to make a circular motion around the end of the first connecting rod 401, thereby driving the diffusion blade 2 to rotate and adjusting the diffusion angle.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps, characterized in that, It includes a diffuser (1), a diffuser blade (2) installed in the middle of the diffuser (1), a centrifugal fan blade (3) installed inside the diffuser (1), an adjustment mechanism (4) fixed on the side of the diffuser (1), and a conduit (5) fixed on the side of the adjustment mechanism (4). The adjustment mechanism (4) includes a first connecting rod (401) mounted on the diffuser blade (2), a second connecting rod (402) mounted at the end of the first connecting rod (401), a fixing block (403) mounted at the end of the second connecting rod (402), an internal gear ring gear (404) bolted inside the fixing block (403), a drive gear (405) meshing with the internal gear ring gear (404), and a screw motor (406) fixed at the lower end of the drive gear (405).

2. The high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps according to claim 1, characterized in that, The diffuser blade (2) is provided with cylindrical rotating shafts (201) at both ends, and a square rotating shaft (202) is provided at the connection between the cylindrical rotating shaft (201) and the first connecting rod (401).

3. A high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps according to claim 1, characterized in that, The upper end of the fixing block (403) is provided with a connecting groove (407), and a locking rod (408) is inserted into the connecting groove (407).

4. A high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps according to claim 1, characterized in that, The lower end of the fixing block (403) is provided with a wing plate (409), and the wing plate (409) is provided with a through hole (410).

5. A high-pressure efficiency-enhancing impeller suitable for multi-stage centrifugal pumps according to claim 1, characterized in that, The internal gear ring (404) has a pair of threaded holes (4041) on its back side.

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