Adjustable axial flow pump impeller blade structure

Abstract

The utility model relates to the technical field of blade structures, in particular to an adjustable axial flow pump impeller blade structure which comprises a main body mechanism, an impeller mechanism and an adjusting mechanism. An impeller mechanism used for conveying fluid is arranged on the outer side of the main body mechanism, the main body mechanism comprises an impeller seat used for bearing the impeller mechanism, four sets of mounting grooves used for mounting the impeller mechanism are formed in the outer end of the impeller seat in a surrounding mode, and adjusting and fixing mechanisms used for adjusting and fixing the impeller mechanism are arranged in the mounting grooves. The adjusting and fixing mechanism comprises an adjusting and fixing cover plate; the angle of the blade can be accurately adjusted through the second adjusting pin hole of the impeller seat and the first adjusting pin hole of the adjusting and fixing cover plate in cooperation with installation of the cylindrical pin, and therefore the angle of the blade can be adjusted in time under different working conditions such as water level change and flow demand change.

Description

Technical Field

[0001] This application relates to the field of blade structure technology, and in particular to an adjustable axial flow pump impeller blade structure. Background Technology

[0002] An axial flow pump is a type of vane pump that relies on the force exerted by the blades of a rotating impeller on the liquid to transport the liquid along the axial direction. It features high flow rate and low head, and is mainly suitable for low-head, high-flow applications, such as irrigation, drainage, dock drainage, and water level regulation in canal locks.

[0003] Currently, the impellers of axial flow pumps on the market are usually fixed and not easy to adjust. The impeller angle cannot be adjusted according to actual usage requirements. Furthermore, some axial flow pumps using frequency conversion regulation will increase the project's budget. Therefore, a simple, effective, and adjustable axial flow pump impeller blade structure has great application prospects.

[0004] Therefore, for the axial flow pumps currently on the market, where the impeller is fixed and inconvenient to adjust, an adjustable axial flow pump impeller blade structure can be designed. By drilling pin holes at different angles on the impeller seat and the adjusting and fixing cover plate of the axial flow pump, and then installing cylindrical pins in different pin holes, the blade angle can be precisely adjusted, thereby solving the above-mentioned problem. Utility Model Content

[0005] To overcome the shortcomings of existing axial flow pumps, such as fixed impellers that are difficult to adjust, impeller angles that cannot be adjusted according to actual usage requirements, and the additional budget required for some axial flow pumps that use frequency conversion, this application provides an adjustable axial flow pump impeller blade structure.

[0006] The technical solution is as follows: An adjustable axial flow pump impeller blade structure includes a main body, an impeller mechanism, and an adjustment mechanism; the outer side of the main body is provided with an impeller mechanism for conveying fluid, the main body includes an impeller seat for supporting the impeller mechanism, the outer end of the impeller seat is provided with four sets of mounting grooves for mounting the impeller mechanism, the inside of the mounting groove is provided with an adjustment and fixing mechanism for adjusting and fixing the impeller mechanism, the adjustment and fixing mechanism includes an adjustment and fixing cover plate.

[0007] Furthermore, the impeller mechanism includes adjusting blades, with four sets of adjusting blades arranged around the upper outer side of the impeller seat.

[0008] Furthermore, the adjusting and fixing cover plate is located inside the mounting groove, and its surface has three sets of blade mounting holes, which are evenly distributed in a triangular pattern on the surface of the adjusting and fixing cover plate.

[0009] Furthermore, four sets of first adjusting pin holes are provided at the edge of the adjusting and fixing cover plate, and the four sets of first adjusting pin holes are evenly distributed along the arc on one side edge of the adjusting and fixing cover plate.

[0010] Furthermore, the inner wall of the mounting groove is arc-shaped and has four sets of second adjusting pin holes, which are concentrically arranged with the four sets of first adjusting pin holes.

[0011] Furthermore, the blade mounting hole is fitted with a cylindrical head screw. The adjusting blade and the adjusting fixing cover are fixedly connected through the blade mounting hole and the cylindrical head screw. A spring washer is provided between the cylindrical head screw and the blade mounting hole.

[0012] Furthermore, the first adjusting pin hole and the second adjusting pin hole are internally matched with cylindrical pins, and the impeller seat and the adjusting and fixing cover plate are adjusted and connected through the first adjusting pin hole, the second adjusting pin hole and the cylindrical pin.

[0013] Beneficial effects: Compared to traditional axial flow pumps where the impeller is mostly fixed and the impeller angle cannot be adjusted according to actual usage needs, this application, through the second adjusting pin hole of the impeller seat and the first adjusting pin hole of the adjusting fixed cover plate, combined with the installation of cylindrical pins, can precisely adjust the blade angle. This allows for timely adjustment of the blade angle under different operating conditions, such as changes in water level or flow demand, ensuring that the axial flow pump is always in a high-efficiency operating state. Some axial flow pumps using frequency conversion regulation can increase project budgets. This application, however, can achieve blade angle adjustment using only drilled pin holes and simple parts such as cylindrical pins and cylindrical head screws, eliminating the need for complex frequency conversion equipment and significantly reducing equipment costs and subsequent maintenance costs. The connection method of this application is simple and stable, effectively preventing the blades from loosening during operation and ensuring the reliability and stability of the axial flow pump. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the axial flow pump impeller blades of this application;

[0015] Figure 2 This is a schematic diagram of the right cross-sectional structure of the axial flow pump impeller blade structure of this application;

[0016] Figure 3 This is a schematic plan view of the mounting groove of the impeller seat in this application;

[0017] Figure 4 This is a schematic diagram of the adjustment and fixing cover plate of this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Impeller mechanism; 101. Adjusting blade; 2. Cylindrical head screw; 3. Spring washer; 4. Main body mechanism; 401. Impeller seat; 402. Mounting groove; 5. Cylindrical pin; 6. Adjusting mechanism; 601. Adjusting fixing cover plate; 7. First adjusting pin hole; 8. Blade mounting hole; 9. Second adjusting pin hole. Detailed Implementation

[0019] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1

[0021] like Figures 1-4 As shown, an adjustable axial flow pump impeller blade structure includes a main body 4, an impeller mechanism 1, and an adjustment mechanism 6. The main body 4 has an impeller mechanism 1 for conveying fluid on its outer side. The main body 4 includes an impeller seat 401 for supporting the impeller mechanism 1. The outer end of the impeller seat 401 is surrounded by four sets of mounting grooves 402 for mounting the impeller mechanism 1. The mounting grooves 402 are provided with an adjustment and fixing mechanism for adjusting and fixing the impeller mechanism 1. The adjustment and fixing mechanism includes an adjustment and fixing cover plate 601.

[0022] The impeller mechanism 1 includes adjusting blades 101, and there are four sets of adjusting blades 101 arranged around the upper outer side of the impeller seat 401.

[0023] The adjusting and fixing cover plate 601 is located inside the mounting groove 402, and three sets of blade mounting holes 8 are opened on its surface. The three sets of blade mounting holes 8 are evenly distributed in a triangular shape on the surface of the adjusting and fixing cover plate 601. Through the triangular distribution of blade mounting holes 8, the connection between the adjusting blade 101 and the adjusting and fixing cover plate 601 is more stable. During the operation of the axial flow pump, this stable connection can effectively disperse the force on the blade and prevent the blade from deforming or loosening due to uneven force.

[0024] Four sets of first adjusting pin holes 7 are provided at the edge of the adjusting and fixing cover plate 601. The four sets of first adjusting pin holes 7 are evenly distributed along one side edge of the adjusting and fixing cover plate 601 in an arc shape. The combination of the four sets of first adjusting pin holes 7 in an arc shape provides multiple selectable positions for blade angle adjustment, increasing the flexibility of adjustment.

[0025] The inner wall of the mounting groove 402 is arc-shaped and has four sets of second adjusting pin holes 9, which are concentrically arranged with the four sets of first adjusting pin holes 7.

[0026] The blade mounting hole 8 is fitted with a cylindrical head screw 2. The adjusting blade 101 and the adjusting fixing cover plate 601 are fixedly connected to the cylindrical head screw 2 through the blade mounting hole 8. A spring washer 3 is provided between the cylindrical head screw 2 and the blade mounting hole 8.

[0027] The first adjusting pin hole 7 and the second adjusting pin hole 9 are internally matched with cylindrical pins 5. The impeller seat 401 and the adjusting and fixing cover plate 601 are connected by adjusting pins 7, adjusting pin holes 9 and cylindrical pins 5. Through the cooperation of cylindrical pins 5 and adjusting pin holes, the angle adjustment between the impeller seat 401 and the adjusting and fixing cover plate 601 is realized quickly and reliably.

[0028] In practice, the workers first drill the second adjusting pin hole 9 at a certain angle in the mounting groove 402 of the impeller seat 401, for example, 30 degrees in this application. Then, they drill the second adjusting pin hole 9 concentrically on the adjusting fixing cover plate 601. The remaining pin holes are drilled at 31 degrees, 62 degrees, and 93 degrees respectively, with 0 degrees as the reference. When the angle of the adjusting blade 101 is 0 degrees, the first adjusting pin hole 7 and the second adjusting pin hole 9 of the adjusting fixing cover plate 601 and the mounting groove 402 are connected. Correspondingly, since the adjusting blade 101 and the adjusting fixed cover plate 601 are connected by the cylindrical head screw 2, they can be considered as one unit. That is, the offset angle of the adjusting fixed cover plate 601 is the angular offset of the adjusting blade 101. When the angle is adjusted, the four sets of first adjusting pin holes 7 and four sets of second adjusting pin holes 9 are connected in an alternating manner. For example, the first set of second adjusting pin holes 9 in the four sets of second adjusting pin holes 9 is connected to the second set of second adjusting pin holes 9 in the four sets of first adjusting pin holes 7, so that they are misaligned and the angle is adjusted.

[0029] In farmland irrigation projects, if the farmland water level is low and a larger lift is needed for irrigation, the staff first locates the second adjusting pin hole 9 at the appropriate angle on the installation slot 402, then aligns the first adjusting pin hole 7 at the corresponding angle on the adjusting and fixing cover plate 601 with the second adjusting pin hole 9 on the impeller seat 401, and inserts the cylindrical pin 5 to fix it. Since the adjusting blade 101 is connected to the adjusting and fixing cover plate 601 through the cylindrical head screw 2, the deflection angle of the adjusting and fixing cover plate 601 is the angle of the adjusting blade 101, thus realizing the angle adjustment of the adjusting blade 101.

[0030] Compared to traditional axial flow pumps with fixed impellers, this structure allows for flexible adjustment of the angle of the regulating blade 101 according to requirements. When the water level changes, the angle of the regulating blade 101 can be adjusted in a timely manner to ensure efficient operation of the axial flow pump. At low water levels, the angle of the regulating blade 101 is increased to raise the head and ensure that water can be smoothly delivered to the corresponding location. When the water level rises, the angle of the regulating blade 101 is reduced to avoid energy waste. Moreover, compared to axial flow pumps with frequency conversion regulation, this structure significantly reduces project budget, reduces operating costs, and improves work efficiency. Furthermore, this application has a simple structure, is easy to operate, and has considerable reliability and portability.

Claims

1. An adjustable axial flow pump impeller blade structure, comprising a main body (4); characterized in that, It also includes an impeller mechanism (1) and an adjustment mechanism (6); the outer side of the main body (4) is provided with an impeller mechanism (1) for conveying fluid, the main body (4) includes an impeller seat (401) for supporting the impeller mechanism (1), the outer end of the impeller seat (401) is provided with four sets of mounting grooves (402) for mounting the impeller mechanism (1), the inside of the mounting groove (402) is provided with an adjustment and fixing mechanism for adjusting and fixing the impeller mechanism (1), the adjustment and fixing mechanism includes an adjustment and fixing cover plate (601).

2. The adjustable axial flow pump impeller blade structure according to claim 1, characterized in that, The impeller mechanism (1) includes adjusting blades (101), and four sets of adjusting blades (101) are arranged around the upper outer side of the impeller seat (401).

3. The adjustable axial flow pump impeller blade structure according to claim 1, characterized in that, The adjusting and fixing cover plate (601) is located inside the mounting groove (402), and three sets of blade mounting holes (8) are opened on its surface. The three sets of blade mounting holes (8) are evenly distributed in a triangular shape on the surface of the adjusting and fixing cover plate (601).

4. The adjustable axial flow pump impeller blade structure according to claim 3, characterized in that, Four sets of first adjusting pin holes (7) are provided at the edge of the adjusting and fixing cover plate (601). The four sets of first adjusting pin holes (7) are evenly distributed along the arc on one side edge of the adjusting and fixing cover plate (601).

5. The adjustable axial flow pump impeller blade structure according to claim 4, characterized in that, The inner wall of the mounting groove (402) is arc-shaped and has four sets of second adjustment pin holes (9), which are concentrically arranged with the four sets of first adjustment pin holes (7).

6. The adjustable axial flow pump impeller blade structure according to claim 3, characterized in that, A cylindrical head screw (2) is provided inside the blade mounting hole (8). The adjusting blade (101) and the adjusting fixing cover plate (601) are fixedly connected to the cylindrical head screw (2) through the blade mounting hole (8). A spring washer (3) is provided between the cylindrical head screw (2) and the blade mounting hole (8).

7. The adjustable axial flow pump impeller blade structure according to claim 5, characterized in that, The first adjusting pin hole (7) and the second adjusting pin hole (9) are equipped with cylindrical pins (5). The impeller seat (401) and the adjusting and fixing cover plate (601) are adjusted and connected through the first adjusting pin hole (7), the second adjusting pin hole (9) and the cylindrical pins (5).

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