Centrifugal pump impeller

Abstract

The utility model discloses a centrifugal pump impeller in the technical field of centrifugal pumps. The centrifugal pump impeller comprises a main shaft and first blades fixedly installed on the main shaft. The flange plate is arranged on the main shaft, and a second blade is arranged outside the flange plate; the rear cover plate is mounted on the flange plate; and a blade groove for embedding the second blade is formed in the rear cover plate. The blades in streamline design are adopted, the resistance of fluid in the impeller is reduced, the fluid passing efficiency is improved, the overall efficiency of the pump is improved, and energy consumption is reduced; through the movable adjusting function of the flange plate, the working area of the first blade can be flexibly adjusted, then the flow of the pump is adjusted, and the adaptability and flexibility of the pump are improved through fine adjustment of the flow; due to the staggered arrangement of the first blades and the second blades and the adjustability of the flange plate, the performance of the pump is improved, the blades are convenient to maintain and replace, and the operation convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, and particularly to an impeller of a centrifugal pump. Background Art

[0002] A centrifugal pump works by using the rotation of an impeller to cause the transported medium to undergo centrifugal motion. The pump shaft drives the impeller and the transported medium to perform high-speed rotational motion, causing the transported medium to undergo centrifugal motion and be thrown towards the outer edge of the impeller. It then flows out of the centrifugal pump through the spiral pump casing flow channel and into the pipeline. The impeller is the core component of a centrifugal pump and determines the performance of the centrifugal pump. Therefore, impeller technology is the core technology of centrifugal pumps, and centrifugal pumps are widely used in industrial, agricultural, municipal and other fields. Traditional centrifugal pump impeller designs usually face some technical challenges, such as difficulties in flow regulation.

[0003] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an impeller of a centrifugal pump is provided. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an impeller of a centrifugal pump to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: An impeller of a centrifugal pump,

[0006] including a main shaft, and first blades fixedly installed on the main shaft;

[0007] a flange installed on the main shaft, and second blades are installed on the outer circumference of the flange;

[0008] a rear cover plate installed on the flange, and blade grooves for embedding the second blades are provided on the rear cover plate.

[0009] As a further optimization of this technical scheme, a number of groups of screw holes are equidistantly provided at one end of the main shaft, and a number of groups of long grooves are also equidistantly provided on the main shaft.

[0010] As a further optimization of this technical scheme, the first blades are provided in at least six groups or more and are fixedly installed at one end of the main shaft.

[0011] As a further optimization of this technical scheme, a number of groups of opening grooves for passing through the first blades are equidistantly provided on the flange. A number of groups of bolts are also installed at one end of the flange, and one end of the bolts is fixedly connected to the screw holes. One end of the first blade is located in the opening grooves, and one end of the first blade is also located in the blade grooves. The number of the blade grooves is twice the number of the opening grooves.

[0012] As a further optimization of this technical scheme, the width of the second blade is smaller than that of the first blade, and the first blade and the second blade are arranged in a staggered manner.

[0013] As a further optimization of this technical solution, the rear cover plate further includes a bushing fixedly connected to one end thereof, and the bushing is also fixed to the flange plate by bolts.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. Improve efficiency and reduce energy consumption: By adopting blades with a streamlined design, the resistance of the fluid in the impeller is reduced, thereby improving the fluid passing efficiency and further enhancing the overall efficiency of the pump. At the same time, the optimized blade outlet angle reduces the turbulence and energy loss of the fluid at the impeller outlet, contributing to energy consumption reduction. 2. Enhance durability and reduce wear: Selecting high-strength and wear-resistant composite materials as the blade material significantly improves the durability of the impeller, extends the service life of the pump, and reduces the maintenance frequency and cost. 3. Improve heat dissipation performance: Long grooves are provided on the main shaft, which helps with heat dissipation, avoids heat accumulation caused by a large number of blades, reduces the failure rate, and ensures the stable operation of the pump. 4. Optimize flow regulation: Through the moving adjustment function of the flange plate, the working area of the first blade can be flexibly adjusted, thereby regulating the flow rate of the pump. This design enables the impeller to finely adjust the flow rate according to the actual working requirements, improving the adaptability and flexibility of the pump. 5. Reduce internal leakage: The gap between the impeller and the pump casing is optimized, effectively reducing internal leakage and improving the volumetric efficiency of the pump. 6. Structural optimization and convenient maintenance: The staggered arrangement of the first blade and the second blade and the adjustability of the flange plate not only improve the performance of the pump but also facilitate the maintenance and replacement of the blades, enhancing the operation convenience. Description of the Drawings

[0016] Figure 1 is a structural schematic diagram of the present utility model;

[0017] Figure 2 is a structural schematic diagram of another perspective of the present utility model;

[0018] Figure 3 is a rated right view structural schematic diagram of the present utility model;

[0019] Figure 4 is an exploded structural schematic diagram of the first blade of the present utility model;

[0020] Figure 5 is a structural schematic diagram of the rear cover plate of the present utility model;

[0021] Figure 6 is a structural schematic diagram of the flange plate of the present utility model;

[0022] Figure 7 is a sectional structural schematic diagram of the present utility model.

[0023] In the figure, the correspondence between the component names and the drawing numbers is as follows:

[0024] 1. Main shaft; 11. Screw hole; 12. Long groove; 2. Rear cover plate; 21. Bush; 22. Blade groove; 3. Second blade; 31. Flange; 32. Open slot; 33. Bolt; 4. First blade. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, unless otherwise specified, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated mechanism or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] As shown in the attached Figure 1 to the attached Figure 7 figures:

[0028] Embodiment 1:

[0029] The present invention provides a technical solution: a centrifugal pump impeller,

[0030] including a main shaft 1 and a first blade 4 fixedly installed on the main shaft 1;

[0031] a flange 31 installed on the main shaft 1, and a second blade 3 is installed outside the flange 31;

[0032] a rear cover plate 2 installed on the flange 31, and a blade groove 22 for embedding the second blade 3 is provided on the rear cover plate 2.

[0033] More specifically, the first blade 4 is installed on the main shaft 1. When the main shaft 1 rotates, the first blade 4 rotates accordingly. The flange 31 is sleeved on the main shaft 1. After being sleeved, it is pushed to the position of the first blade 4, and the flange 31 is fixed. Then, the second blade 3 on the flange 31 is fixed to the main shaft 1. At this time, when the main shaft 1 rotates, the second blade 3 also rotates accordingly. The rear cover plate 2 is sleeved outside the flange 31 and then fixed. At this time, the second blade 3 is located in the blade groove 22 of the rear cover plate 2, and the rear cover plate 2 is fixed to the main shaft 1. Then, when the main shaft 1 rotates, the rear cover plate 2 also rotates. At this time, one end of the first blade 4 is located outside the rear cover plate 2 to drive the water flow, while the second blade 3 is received in the blade groove 22 of the rear cover plate 2.

[0034] Further, several groups of screw holes 11 are equidistantly arranged at one end of the main shaft 1, and several groups of long grooves 12 are also equidistantly arranged on the main shaft 1.

[0035] More specifically, the long groove 12 plays a role in heat dissipation. Since the number of the first blades 4 and the second blades 3 is large, the failure rate is reduced by avoiding excessive heat during operation.

[0036] Further, the first blade 4 is provided with at least six groups or more and is fixedly installed at one end of the main shaft 1.

[0037] More specifically, it can be fixed by a screw and nut assembly or by welding, as long as it rotates with the main shaft 1.

[0038] Further, several groups of opening grooves 32 for penetrating the first blade 4 are equidistantly arranged on the flange 31. One end of the flange 31 is also provided with several groups of bolts 33. One end of the bolt 33 is fixedly connected to the screw hole 11. One end of the first blade 4 is located in the opening groove 32, and one end of the first blade 4 is also located in the blade groove 22. The number of the blade grooves 22 is twice the number of the opening grooves 32.

[0039] More specifically, several groups of bolts 33 fix the flange 31 on the main shaft 1. The position of the flange 31 can move on the main shaft 1, and then drive the second blade 3 fixedly connected to the upper end to be aligned side by side with the front end and the rear end of the first blade 4. As shown in the accompanying drawing of the specification Figure 4 , A is the rear end and B is the front end. The function of moving and adjusting is to make all parts of the first blade 4 play a role at the front end and the rear end, or only the rear end play a role. By such adjustment, the water flow driven during operation can be adjusted.

[0040] Further, the width of the second blade 3 is smaller than that of the first blade 4, and the first blade 4 and the second blade 3 are arranged in an interleaved manner.

[0041] More specifically, by pushing the flange 31 to move, the second blade 3 is aligned side by side with the front end or the rear end of the first blade 4, and then fixed stably, so as to increase or decrease the working area of the first blade 4.

[0042] Furthermore, the rear cover plate 2 further includes a bushing 21 fixedly connected to one end thereof, and the bushing 21 is also fixed to the flange 31 by bolts 33.

[0043] More specifically, after the bushing 21 is fixed, when the main shaft 1 rotates, the main shaft 1 drives the flange 31, and the flange 31 drives the bushing 21 to rotate, so as to achieve the state where both the first blade 4 and the second blade 3 rotate and work.

[0044] In the present utility model, the blades of the first blade 4 and the second blade 3 adopt a streamlined design to reduce fluid resistance and improve fluid passing efficiency. The material is selected as a high-strength and wear-resistant composite material to improve its durability. The outlet angle is accurately calculated to reduce the turbulence and energy loss of the fluid at the impeller outlet. The gap between the impeller and the pump casing is optimized to reduce internal leakage and improve the volumetric efficiency of the pump.

[0045] Embodiment 2:

[0046] The number of blades of the first blade 4 and the second blade 3 is 6 respectively. Blade material: carbon fiber reinforced plastic; Blade outlet angle: 25 degrees. Impeller diameter: 200 mm. Gap between the impeller and the pump casing: 1 mm.

[0047] Through experimental tests, the centrifugal pump designed with this impeller has an efficiency increase of 15% and an energy consumption reduction of 20% compared with the traditional design.

[0048] The experimental report is as follows:

[0049] Experimental purpose: To evaluate the performance improvement of the centrifugal pump impeller design in terms of efficiency and energy consumption compared with the traditional impeller.

[0050] Experimental equipment and materials: Two centrifugal pumps for testing, one equipped with a traditional impeller and the other equipped with the centrifugal pump type impeller of the present utility model. A flow meter and a pressure sensor for measuring the flow rate and pressure of the pump. An electric energy meter for measuring the energy consumption of the pump. Water is used as the test medium. A laboratory test circulation system, including a water storage tank, pipelines, valves, etc.

[0051] Experimental method:

[0052] 1. Install the two centrifugal pumps in the same test circulation system.

[0053] 2. Under the same system pressure and flow rate conditions, measure the energy consumption and efficiency of the two pumps respectively.

[0054] 3. Record and compare the performance data of pumps with two impeller designs at different operating points.

[0055] Experimental data:

[0056]

[0057] Conclusion:

[0058] Analysis of experimental results: As can be seen from the experimental data, under all test conditions, the centrifugal pumps equipped with the impeller of the present utility model show higher efficiency and lower energy consumption. Especially under high-flow conditions, the efficiency improvement and energy consumption reduction are more significant.

[0059] Conclusion:

[0060] The experimental results show that the impeller design of the centrifugal pump of the present utility model has significant advantages in improving the pump efficiency and reducing energy consumption. Compared with traditional impellers, the impeller designed by the present utility model can effectively reduce energy losses and improve the overall performance of the pump.

[0061] The impeller design of the centrifugal pump of the present utility model significantly improves the operating efficiency and durability of the pump by optimizing the geometric structure and material selection of the impeller, and has good application prospects.

[0062] Working principle:

[0063] In the present utility model, 1. The coordinated operation of the main shaft and the blades: The main shaft 1, as the core of the entire impeller assembly, is responsible for transmitting power and supporting the blades. The first blade 4 is fixedly installed on the main shaft 1. When the main shaft 1 rotates, the first blade 4 rotates accordingly, generating a centrifugal force to push the fluid (such as water) to move radially outward. The second blade 3 is fixed to the main shaft 1 through the flange 31. The flange 31 is sleeved on the main shaft 1 and fixed to ensure that the second blade 3 rotates with the main shaft 1.

[0064] 2. The functions of the rear cover plate and the blade groove: The rear cover plate 2 is sleeved on the outside of the flange 31 and fixed. The second blade 3 is embedded in the blade groove 22 on the rear cover plate 2 to ensure the stability of the second blade 3 during rotation. One end of the first blade 4 is located outside the rear cover plate 2, playing a role in pushing the fluid, while the second blade 3 is received in the blade groove 22, working together to improve the efficiency of the pump.

[0065] 3. Heat dissipation and adjustment functions: The main shaft 1 is provided with a long groove 12 for heat dissipation to prevent heat accumulation caused by a large number of blades, reducing the failure rate. The opening groove 32 on the flange 31 allows the end of the first blade 4 to pass through, and the bolt 33 is used to fix the position of the flange 31 on the main shaft 1, while allowing the flange 31 to move along the main shaft 1 to achieve the adjustment of the working area of the first blade 4.

[0066] 4. Adjustment and staggered arrangement of blades: The width of the second blade 3 is smaller than that of the first blade 4, and they are arranged in a staggered manner, which helps to improve the flow efficiency of the fluid and the performance of the pump. The moving adjustment function of the flange 31 enables the second blade 3 to be aligned side by side with the front end or the rear end of the first blade 4. By adjusting the position of the flange 31, the working area of the first blade 4 can be changed, thereby adjusting the flow rate of the pump.

[0067] 5. Function of the shaft sleeve: One end of the rear cover plate 2 is fixedly connected with a shaft sleeve 21, and the shaft sleeve 21 is fixed on the flange 31 by bolts 33. When the main shaft 1 rotates, the shaft sleeve 21 rotates accordingly, ensuring that the flange 31 and the second blade 3 also rotate, realizing the coordinated operation of the entire impeller assembly.

[0068] In summary, the impeller of this centrifugal pump drives the first blade and the second blade fixed on it through the rotation of the main shaft, and uses the centrifugal force of the blades to push the fluid to flow. By adjusting the movement of the flange, the working area of the blades can be changed, thereby adjusting the flow rate and efficiency of the pump. At the same time, heat dissipation and the staggered arrangement of the blades are considered in the design to improve the overall performance and reliability of the pump.

[0069] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump impeller, characterized in that: It includes a main shaft (1), and a first blade (4) fixedly installed on the main shaft (1); A flange (31) installed on the main shaft (1), and a second blade (3) is installed outside the flange (31); A rear cover plate (2) installed on the flange (31), and a blade groove (22) for embedding the second blade (3) is provided on the rear cover plate (2).

2. The centrifugal pump impeller according to claim 1, characterized in that: A number of groups of screw holes (11) are equidistantly provided at one end of the main shaft (1), and a number of groups of long grooves (12) are also equidistantly provided on the main shaft (1).

3. A centrifugal pump impeller according to claim 2, characterized in that: The first blades (4) are provided in at least six groups or more, and are fixedly installed at one end of the main shaft (1).

4. A centrifugal pump impeller according to claim 3, characterized in that: A number of groups of opening grooves (32) for passing through the first blades (4) are equidistantly provided on the flange (31), and a number of groups of bolts (33) are also installed at one end of the flange (31). One end of the bolt (33) is fixedly connected to the screw hole (11). One end of the first blade (4) is located in the opening groove (32), and one end of the first blade (4) is also located in the blade groove (22). The number of the blade grooves (22) is twice the number of the opening grooves (32).

5. A centrifugal pump impeller according to claim 4, characterized in that: The width of the second blade (3) is smaller than that of the first blade (4), and the first blade (4) and the second blade (3) are arranged in an alternating manner.

6. The centrifugal pump impeller according to claim 5, characterized in that: The rear cover plate (2) further includes a shaft sleeve (21) fixedly connected to one end thereof, and the shaft sleeve (21) is also fixed on the flange (31) by bolts (33).

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