Rotary vane for centrifugal pump

Abstract

The utility model discloses a rotary vane for a centrifugal pump, and relates to the technical field of centrifugal pumps. Comprising a second rotating shaft sleeve, and four fan-shaped rotating sheets are uniformly arranged on the peripheral wall of the lower section of the second rotating shaft sleeve at the same horizontal height. The rotary pieces are in the same screwing direction and angle in different view directions, and the edge of the other side, away from the rotary shaft sleeve, of each rotary piece is in an inclined long strip shape. The thickness of each rotary vane is 1.5 mm, a gap of 3 mm is formed between every two adjacent rotary vanes, a transition fillet with the radius of 1.5 mm is arranged at the joint, the outer diameter of the second rotary shaft sleeve is 22 mm, and the inner diameter of the second rotary shaft sleeve is 19 mm According to the design of the rotary vane, when fluid makes contact with the water inlet plane of the pump body, the fluid can be quickly sucked into the pump body, the guide effect is achieved, therefore, it is ensured that a sealing piece does not lack water, the fault that the sealing piece is damaged due to dry rotation is reduced, meanwhile, when some aluminum scraps easily block a water hole, water outlet action is avoided through work of the pump, and the rotary vane can spray the fluid outwards; therefore, the frequency of slag cleaning is reduced, the production efficiency is improved, the reliability of the centrifugal pump is improved, and the service life of the centrifugal pump is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, and specifically to a vane for a centrifugal pump. Background Technology

[0002] Centrifugal pumps are widely used fluid transport equipment in industry, agriculture and daily life. Their performance directly affects the operating efficiency and stability of related systems.

[0003] Traditional centrifugal pumps often employ a single spiral vane structure, such as... Figures 1 to 3 As shown:

[0004] The single spiral blade structure includes a first rotating shaft sleeve 101, which is a hollow structure. A connector 102 is provided on the top of the first rotating shaft sleeve 101, and spiral blades 103 arranged spirally in the axial direction are provided on the outer peripheral wall of the lower section of the first rotating shaft sleeve 101.

[0005] This structure has revealed many problems in actual operation. A single spiral blade can cause uneven fluid flow within the pump, easily generating eddies and turbulence, reducing pump efficiency. At the same time, when a single spiral blade is under stress, it can cause the shaft to be subjected to eccentric stress, accelerating shaft wear, increasing the risk of failure, and shortening the service life of the centrifugal pump. Utility Model Content

[0006] To address the aforementioned technical problems, this application solves the issues that a single spiral blade can cause uneven fluid flow within the pump, easily generating eddies and turbulence, thus reducing pump efficiency; at the same time, a single spiral blade can cause eccentric stress on the shaft when under force, accelerating shaft wear, increasing the risk of failure, and shortening the service life of the centrifugal pump.

[0007] To achieve the above objectives, the technical solution adopted in this application is: a centrifugal pump vane, including a second rotating shaft sleeve, wherein four vanes are arranged in a fan shape in the top view at the lower section of the second rotating shaft sleeve.

[0008] All the blades are evenly spaced on the outer peripheral wall of the second rotating shaft sleeve at the same horizontal height position on one side edge of the second rotating shaft sleeve;

[0009] The outer contour portion of all the rotating blades between the edge of the blades closest to the second rotating sleeve and the edge of the blades furthest from the second rotating sleeve is in the same twisting direction and the same twisting angle in the front view, left view, rear view, and right view, respectively. This makes the outer contour of the edge of each rotating blade furthest from the second rotating sleeve in the corresponding view direction an inclined strip, and the edges of these strip-shaped rotating blades are congruent to each other.

[0010] To better realize this utility model, further, each of the said rotary blades has a first distance between the highest position of the outer contour of the other side edge away from the second rotating sleeve in the corresponding view direction and the upper edge of the side edge of the rotary blade close to the second rotating sleeve;

[0011] Each of the said blades has a second distance between the lowest position of the outer contour of the blade on the side away from the second rotating sleeve in the corresponding view direction and the lower edge of the side edge of the blade closer to the second rotating sleeve;

[0012] The first distance is equal to the second distance.

[0013] To better realize this utility model, further, any two adjacent rotary blades form a gap between each other in the top view direction, the width of the gap being 3mm, and any two adjacent rotary blades form a transition fillet between the edges of the side closest to the second rotating sleeve in the top view direction.

[0014] To better realize this utility model, the radius of the transition fillet is further 1.5mm.

[0015] To better realize this utility model, the outer diameter of the second rotating bushing is 22mm and the inner diameter is 19mm.

[0016] To better realize this utility model, the thickness of the rotary blade is 1.5mm, and the inclination angle of the outer contour of the other edge of each rotary blade away from the second rotating sleeve in the corresponding view direction is 25° to 45°.

[0017] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0018] 1. The symmetrical and reasonable structure of the vane and shaft sleeve of this utility model greatly reduces abnormal wear between the components of the centrifugal pump. The previous situation where a single spiral vane caused eccentric stress on the shaft and frequent replacement of worn shafts is improved. This not only reduces the frequency of component replacement but also reduces downtime due to equipment maintenance, significantly reducing maintenance costs and improving the economic efficiency of the equipment. Attached Figure Description

[0019] 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 or the prior art 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.

[0020] Figure 1 This is a schematic diagram of the overall structure of the existing technology;

[0021] Figure 2 In the existing technology Figure 1 Top view;

[0022] Figure 3 In the existing technology Figure 1 A bottom view.

[0023] In the diagram: 101 - First rotating shaft sleeve; 102 - Connector; 103 - Spiral blade.

[0024] Figure 4 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 5 In this utility model Figure 4 The front view;

[0026] Figure 6 This utility model Figure 4 Top view;

[0027] Figure 7 This is a schematic diagram of the installation of this utility model.

[0028] In the diagram: 201 - Second rotating sleeve; 202 - Rotary blade; 203 - Transition fillet. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for 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 this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] Example 1:

[0036] like Figures 4 to 7 As shown, a centrifugal pump vane 103 includes a second rotating shaft sleeve 201, and four vanes 202 arranged in a fan shape in the top view are arranged at the lower section of the second rotating shaft sleeve 201.

[0037] All the blades 202 are evenly spaced on the outer peripheral wall of the second rotating sleeve 201 at the same horizontal height position on one side edge of the second rotating sleeve 201.

[0038] The outer contour portion of all the rotating blades 202 between the edge of one side near the second rotating sleeve 201 and the edge of the other side away from the second rotating sleeve 201 is in the same twisting direction and the same twisting angle in the front view, left view, rear view and right view respectively, so that the outer contour of the other side edge of each rotating blade 202 away from the second rotating sleeve 201 in the corresponding view direction is an inclined strip, and the other side edges of these strip-shaped rotating blades 202 are congruent to each other.

[0039] Specifically, all the rotating blades 202 are evenly spaced on the outer peripheral wall of the second rotating sleeve 201 at the same horizontal height position.

[0040] The outer contour portion of the first rotary blade 202 between the side edge of the first rotary blade 202 near the second rotating sleeve 201 and the other side edge of the first rotary blade 202 away from the second rotating sleeve 201 is in a clockwise twisted state in the front view direction (i.e., uniformly twisted in the front view direction), and the outer contour of the other side edge of the first rotary blade 202 away from the second rotating sleeve 201 in the front view direction is an inclined first strip shape.

[0041] The outer contour portion of the second rotary blade 202 between the side edge of the second rotary blade 202 near the second rotating sleeve 201 and the other side edge of the second rotary blade 202 away from the second rotating sleeve 201 is in a clockwise twisted state in the left view direction, and the outer contour of the other side edge of the second rotary blade 202 away from the second rotating sleeve 201 in the left view direction is a second elongated shape arranged at an angle.

[0042] The outer contour portion of the third rotary blade 202 between the side edge of the third rotary blade 202 near the second rotating sleeve 201 and the other side edge of the third rotary blade 202 away from the second rotating sleeve 201 is in a clockwise twisted state in the rear view direction, and the outer contour of the other side edge of the third rotary blade 202 away from the second rotating sleeve 201 in the rear view direction is an inclined third strip shape.

[0043] The outer contour portion of the fourth rotary blade 202, between the side edge of the fourth rotary blade 202 near the second rotating sleeve 201 and the other side edge of the fourth rotary blade 202 away from the second rotating sleeve 201, is in a clockwise twisted state in the right view direction, and the outer contour of the other side edge of the fourth rotary blade 202 away from the second rotating sleeve 201 in the right view direction is an inclined fourth strip shape.

[0044] The outer contour portions of the first, second, third, and fourth rotary blades 202 are all twisted at the same angle, and the first, second, third, and fourth elongated shapes are all equal to each other.

[0045] like Figures 4 to 7 As shown, in this embodiment, there is a first distance between the highest position of the outer contour of the other side edge of each of the rotary blades 202 away from the second rotating sleeve 201 in the corresponding view direction and the upper edge of the side edge of the rotary blade 202 close to the second rotating sleeve 201.

[0046] The lowest position of the outer contour of each of the said rotary blades 202 on the other side edge away from the second rotating sleeve 201 in the corresponding view direction has a second distance between the lower edge of the rotary blade 202 on the side edge near the second rotating sleeve 201.

[0047] The first distance is equal to the second distance.

[0048] like Figures 4 to 7 As shown, in this embodiment, any two adjacent rotary blades 202 form a gap between each other in the top view direction, the width of the gap is 3mm, and any two adjacent rotary blades 202 form a transition fillet 203 in the top view direction between the edges of the side of the second rotating sleeve 201.

[0049] like Figures 4 to 7 As shown, in this embodiment, the radius of the transition fillet 203 is 1.5mm.

[0050] like Figures 4 to 7 As shown, in this embodiment, the outer diameter of the second rotating bushing 201 is 22mm and the inner diameter is 19mm.

[0051] like Figures 4 to 7 As shown, in this embodiment, the thickness of the rotary blade 202 is 1.5 mm, and the inclination angle of the outer contour of the other edge of each rotary blade 202 away from the second rotating sleeve 201 in the corresponding view direction is 25° to 45°. For example, the inclination angle is 25°, 30°, 35°, 40° or 45°.

[0052] The second shaft sleeve 201 has a vertically hollow structure and is fitted onto the bottom of the centrifugal pump shaft (its fitting method is an existing mature technology).

[0053] Compared to existing technologies (background art), this application provides four fan-shaped vanes 202 on the outer peripheral wall of the second rotating sleeve 201, and the vanes 202 have the same twisting direction and angle in different view directions, making the fluid flow in the pump more uniform and stable. In contrast, a single spiral vane 103 may cause uneven fluid flow, generating eddies and turbulence, affecting the pump's efficiency and performance.

[0054] Secondly, the four spiral vanes 202 are evenly arranged on the second rotating shaft sleeve 201, making the structure more symmetrical and stable. This structure can better withstand various forces generated during the operation of the centrifugal pump, such as centrifugal force and fluid pressure, reducing shaft deformation and vibration, and improving the reliability and service life of the pump. In contrast, a single spiral vane 103 may cause eccentric stress on the shaft when under stress, increasing shaft wear and the risk of failure.

[0055] The outer contour angle of the vane 202's edge away from the shaft in the corresponding view direction is designed to be between 25° and 45°. This angle range ensures sufficient axial thrust for the fluid while allowing for smoother fluid flow within the pump, reducing flow resistance and energy loss. If the angle is too small, the axial thrust obtained by the fluid will be insufficient, affecting the pump's flow rate; if the angle is too large, it may lead to excessively high fluid velocity on the surface of the vane 202, generating excessive turbulence and energy loss, thus reducing pump efficiency.

[0056] The thickness of the vane 202 is 1.5mm. This thickness ensures that the vane 202 has sufficient strength and rigidity to withstand the pressure and centrifugal force of the fluid, without increasing the weight and material cost due to excessive thickness, and without causing insufficient structural strength, deformation or damage due to excessive thinness.

[0057] Any two adjacent vanes 202 form a 3mm gap between each other in the top view. This gap is of moderate size, allowing fluid to pass smoothly between adjacent vanes 202 while preventing excessive fluid leakage and reduced pump volumetric efficiency due to excessively large gaps. A suitable gap width helps optimize the fluid flow path within the pump and improves the overall pump performance.

[0058] A 1.5mm radius transition fillet is formed between the edges of adjacent vanes 202 near the shaft in the top view. This transition fillet design reduces local resistance and vortex generation during fluid flow. The fluid transitions more smoothly at the vane 202 connection, reducing energy loss and improving pump efficiency. It also helps reduce fluid disturbance, resulting in more stable fluid flow.

[0059] The second rotating sleeve 201 has an outer diameter of 22mm and an inner diameter of 19mm. This size design matches the centrifugal pump's shaft, ensuring the fitting accuracy between the sleeve and the shaft. This guarantees that the sleeve can stably fit on the shaft during pump operation, transmitting power and supporting the vanes 202. At the same time, the suitable inner and outer diameters also help optimize the internal space layout of the pump, making the overall pump structure more compact and rational.

[0060] The four vanes 202 are arranged in a fan shape in the top view, with their edges near the shaft evenly spaced on the outer peripheral wall of the shaft sleeve at the same horizontal height. This distribution ensures that the vanes 202 are uniformly distributed in the circumferential direction, applying force evenly to the fluid. This avoids uneven force distribution on the fluid, preventing eccentric forces and vibrations caused by uneven vane distribution, thus improving the pump's stability and reliability. Furthermore, the fan-shaped design makes full use of the circumferential space, arranging multiple vanes 202 within a limited space, increasing the contact area with the fluid and improving the pump's delivery capacity.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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 rotary vane for a centrifugal pump, characterized in that: Includes a second rotating sleeve (201), and four fan-shaped rotating blades (202) are arranged at the lower section of the second rotating sleeve (201); All the blades (202) are evenly spaced on the outer peripheral wall of the second rotating sleeve (201) at the same horizontal height position on one side edge of the second rotating sleeve (201); The outer contour portion of all the rotating blades (202) between the edge of the side closest to the second rotating sleeve (201) and the edge of the side furthest from the second rotating sleeve (201) is in the same twisting direction and the same twisting angle in the front view, left view, rear view and right view respectively, so that the outer contour of the edge of the other side of each rotating blade (202) furthest from the second rotating sleeve (201) in the corresponding view direction is an inclined strip, and the other edges of these strip-shaped rotating blades (202) are congruent to each other.

2. The centrifugal vane for a centrifugal pump according to claim 1, characterized in that: Each of the said blades (202) has a first distance between the highest position of the outer contour of the blade (202) away from the second rotating sleeve (201) in the corresponding view direction and the upper edge of the blade (202) near the second rotating sleeve (201); Each of the said blades (202) has a second distance between the lowest position of the outer contour of the blade (202) away from the second rotating sleeve (201) in the corresponding view direction and the lower edge of the blade (202) near the second rotating sleeve (201); The first distance is equal to the second distance.

3. A centrifugal pump vane according to claim 1 or 2, characterized in that: Any two adjacent blades (202) form a gap between each other in the top view direction, the gap being 3mm wide, and any two adjacent blades (202) form a transition fillet (203) between the edges of the side closest to the second rotating sleeve (201) in the top view direction.

4. A centrifugal pump vane according to claim 3, characterized in that: The radius of the transition fillet (203) is 1.5 mm.

5. A centrifugal pump vane according to claim 2, characterized in that: The outer diameter of the second rotating bushing (201) is 22mm and the inner diameter is 19mm.

6. A centrifugal pump vane according to claim 1 or 2, characterized in that: The thickness of the rotary blade (202) is 1.5 mm, and the inclination angle of the outer contour of the other edge of each rotary blade (202) away from the second rotating sleeve (201) in the corresponding view direction is 25° to 45°.

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