Supporting flow guide frame for water suction horn mouth of vertical axial flow pump

Abstract

The utility model provides a supporting flow guide frame for a water suction horn mouth of a vertical axial flow pump, and relates to the technical field of water pumps. The supporting flow guide frame comprises a bottom support, an arc-shaped flow guide plate, a check ring and a flow guide cone. The flow guide cone and the arc-shaped flow guide plates are arranged on the bottom support; the arc-shaped flow guide plates are arranged on the periphery of the flow guide cone in a circumferential array mode and are as high as the flow guide cone; the check ring is fixed to the top of the arc-shaped guide plate. The water absorption horn mouth is placed on the arc-shaped flow guide plate and located in the check ring; the supporting flow guide frame stably supports the water suction horn mouth through the evenly-arranged arc-shaped flow guide plates, vibration of the water suction horn mouth is prevented, and the operation stability of the water pump is improved. The fluid dynamics principle is considered in the design of the flow guide cone and the arc-shaped flow guide plate, so that water flow can uniformly and smoothly enter the impeller, the prewhirl phenomenon generated before the water flow near the water suction horn mouth enters the impeller is avoided, the inlet angle of the water flow entering the impeller is optimized, and therefore the operation efficiency and stability of the water pump are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a supporting guide frame for a water suction bell mouth of a vertical axial flow pump. Background Art

[0002] Vertical axial flow pumps are widely used in agricultural irrigation, drainage and other occasions due to their large flow, simple structure, stable operation and convenient maintenance. The working principle is to suck the liquid through the high-speed rotating impeller and discharge it axially to achieve water flow transportation.

[0003] As an important part of the vertical axial flow pump, the suction bell mouth is mainly used to guide water evenly to the impeller to ensure the efficient and stable operation of the water pump. However, since the suction bell mouth is suspended in the water inlet pool and is far away from the pump base, it is easily affected by the impact of water flow and the vibration of the unit itself during operation, resulting in vibration problems. This vibration will not only cause the connection parts between the suction bell mouth and the pump body to loosen or be damaged, but also affect the operation safety and stability of the entire unit. At the same time, when the vertical axial flow pump is running, the high-speed rotation of the impeller will cause the water flow near the suction bell mouth to pre-swirl before entering the impeller. This pre-swirl not only changes the ideal inflow state of the water flow entering the impeller, causing turbulence in the water flow in the pump, and then causing vibration and noise in the pump, but also the pre-swirl will form a vortex near the suction bell mouth, reducing the efficiency and operation stability of the water pump. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a support guide frame for a vertical axial flow pump water suction bell mouth, which solves the problem of reduced pump efficiency and decreased operating stability caused by vibration of the water suction bell mouth and water pre-vortex during the operation of the vertical axial flow pump.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A support guide frame for a vertical axial flow pump water suction bell mouth, the support guide frame comprising: a bottom support, an arc-shaped guide plate, a retaining ring and a guide cone;

[0007] The central axes of the bottom support, the arc-shaped guide plate, the retaining ring and the guide cone coincide with each other;

[0008] The guide cone and a plurality of arc-shaped guide plates are arranged on the bottom support;

[0009] The arc-shaped guide plates are arranged in a circular array around the guide cone, the arc-shaped guide plates are fitted and fixed to the guide cone, and the arc-shaped guide plates and the guide cone have the same height;

[0010] The retaining ring is fixed on the top of the arc-shaped guide plate;

[0011] The water suction bell mouth is placed on the arc guide plate and is located inside the retaining ring.

[0012] Preferably, the height of the arc-shaped guide plate and the guide cone is h=(0.6-0.8)D;

[0013] Where D is the bottom diameter of the water suction bell.

[0014] Preferably, a rectangular coordinate system is established with the center of the bottom surface of the water suction bell mouth as the origin, and the generatrix equation of the guide cone is:

[0015]

[0016] Where, h is the height of the guide cone;

[0017] D is the bottom diameter of the water suction bell.

[0018] Preferably, the inner diameter of the retaining ring is slightly larger than the bottom diameter of the water suction bell mouth, and the top of the retaining ring is higher than the top of the arc-shaped guide plate.

[0019] Preferably, the inner diameter of the retaining ring is d=(1.05-1.08)D; the top of the retaining ring is 100-300 mm higher than the top of the arc-shaped guide plate.

[0020] Preferably, the number of the arc-shaped guide plates is 5 to 7.

[0021] Preferably, the arc-shaped guide plate is a streamlined symmetrical structure that is thick on the outside and thin on the inside.

[0022] The utility model provides a support guide frame for a vertical axial flow pump water suction bell mouth. Compared with the prior art, it has the following beneficial effects:

[0023] In the utility model, the support guide frame includes: a bottom support, an arc-shaped guide plate, a retaining ring and a guide cone; the central axes of the bottom support, the arc-shaped guide plate, the retaining ring and the guide cone coincide with each other; the guide cone and a plurality of arc-shaped guide plates are arranged on the bottom support; the arc-shaped guide plates are arranged in a circular array around the guide cone, the arc-shaped guide plates are fitted and fixed to the guide cone, and the heights of the arc-shaped guide plates and the guide cone are the same; the retaining ring is fixed on the top of the arc-shaped guide plate; the water suction bell mouth is placed on the arc-shaped guide plate and is located in the retaining ring; the support guide frame provides stable support for the water suction bell mouth through the evenly arranged arc-shaped guide plates, prevents the water suction bell mouth from vibrating, and improves the operating stability of the water pump; the design of the guide cone and the arc-shaped guide plate takes into account the principles of fluid dynamics, so that the water flow can enter the impeller evenly and smoothly, avoids the pre-rotation phenomenon of the water flow near the water suction bell mouth before entering the impeller, optimizes the inlet angle of the water flow entering the impeller, and thus improves the operating efficiency and stability of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is an axonometric view of the support guide frame in the embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the assembly of the supporting guide frame and the water absorption bell mouth in the embodiment of the utility model;

[0027] The reference numerals in the figure are set as: bottom support 1, arc-shaped guide plate 2, retaining ring 3, guide cone 4, water suction bell mouth 5. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The embodiment of the present application solves the problem of reduced pump efficiency and reduced operating stability caused by vibration of the suction bell mouth and pre-vortex of water flow during the operation of the vertical axial flow pump by providing a support guide frame for the suction bell mouth of the vertical axial flow pump.

[0030] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0031] In an embodiment of the utility model, the support guide frame includes: a bottom support, an arc-shaped guide plate, a retaining ring and a guide cone; the central axes of the bottom support, the arc-shaped guide plate, the retaining ring and the guide cone coincide with each other; the guide cone and a plurality of arc-shaped guide plates are arranged on the bottom support; the arc-shaped guide plates are arranged in a circular array around the guide cone, the arc-shaped guide plates are fitted and fixed to the guide cone, and the heights of the arc-shaped guide plates and the guide cone are the same; the retaining ring is fixed on the top of the arc-shaped guide plate; the water suction bell mouth is placed on the arc-shaped guide plate and is located in the retaining ring; the support guide frame provides stable support for the water suction bell mouth through the evenly arranged arc-shaped guide plates, prevents the water suction bell mouth from vibrating, and improves the operating stability of the water pump; the design of the guide cone and the arc-shaped guide plate takes into account the principles of fluid dynamics, so that the water flow can enter the impeller evenly and smoothly, avoids the pre-rotation phenomenon of the water flow near the water suction bell mouth before entering the impeller, optimizes the inlet angle of the water flow entering the impeller, and thus improves the operating efficiency and stability of the water pump.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Example:

[0034] like Figure 1 , Figure 2 As shown, the utility model provides a support guide frame for a vertical axial flow pump water suction bell mouth, the support guide frame comprises: a bottom support 1, an arc-shaped guide plate 2, a retaining ring 3 and a guide cone 4;

[0035] The central axes of the bottom support 1, the arc-shaped guide plate 2, the retaining ring 3 and the guide cone 4 coincide with each other;

[0036] The guide cone 4 and a plurality of arc-shaped guide plates 2 are arranged on the bottom support 1;

[0037] The arc-shaped guide plates 2 are arranged in a circular array around the guide cone 4, the arc-shaped guide plates 2 are fitted and fixed to the guide cone 4, and the arc-shaped guide plates 2 and the guide cone 4 have the same height;

[0038] The retaining ring 3 is fixed on the top of the arc-shaped guide plate 2;

[0039] The water suction bell mouth 5 is placed on the arc-shaped guide plate 2 and is located inside the retaining ring 3 .

[0040] The support guide frame provides stable support for the water suction bell mouth 5 through the evenly arranged arc guide plates 2, thereby preventing the water suction bell mouth 5 from vibrating and improving the operating stability of the water pump; the design of the guide cone 4 and the arc guide plate 2 takes into account the principles of fluid dynamics, so that the water flow can enter the impeller evenly and smoothly, avoiding the pre-rotation phenomenon of the water flow near the water suction bell mouth 5 before entering the impeller, optimizing the inlet angle of the water flow entering the impeller, thereby improving the operating efficiency and stability of the water pump.

[0041] The height of the arc guide plate 2 and the guide cone 4 is h=(0.6-0.8)D;

[0042] Wherein D is the bottom diameter of the water suction bell mouth 5.

[0043] The height design of the arc guide plate 2 and the guide cone 4 is based on an in-depth study of the flow characteristics of the water flow at the water pump suction bell mouth 5. Within this height range, the arc guide plate and the guide cone can effectively guide the water flow and significantly suppress the generation of vortex and pre-swirl, thereby ensuring that the water flow enters the impeller in a more stable state and improving the operating efficiency of the water pump.

[0044] A rectangular coordinate system is established with the center of the bottom surface of the water suction bell mouth 5 as the origin, and the generatrix equation of the guide cone 4 is:

[0045]

[0046] Wherein, h is the height of the guide cone 4;

[0047] D is the bottom diameter of the water suction bell mouth 5.

[0048] The water guide cone 4 with a hyperbolic design can effectively adapt to the water flow distribution near the water suction bell mouth 5 and evenly guide the water flow to the impeller, thereby forming a stable flow field and reducing turbulence. This helps to reduce flow losses and improve the water suction efficiency of the pump.

[0049] At the same time, this shape of the water guide cone 4 and the arc-shaped guide plate 2 helps to reduce or eliminate vortices that may be generated near the water suction bell mouth 5, and suppress the pre-swirl effect caused by the high-speed rotation of the impeller, thereby improving the stability and efficiency of the water pump operation.

[0050] The inner diameter d of the retaining ring 3 is (1.05-1.08)D; the top of the retaining ring 3 is 100-300 mm higher than the top of the arc-shaped guide plate 2.

[0051] The inner diameter of the retaining ring 3 is slightly larger than the diameter of the water suction bell mouth 5, so that the retaining ring 3 does not contact the water suction bell mouth 5, reducing the vibration of the water pump and causing the retaining ring 3 and the water suction bell mouth 5 to collide and cause wear or damage, and leaving a certain inner diameter margin is also beneficial to the tolerance control in the manufacturing process, as well as the convenience during assembly and maintenance; the retaining ring 3 is designed to be higher than the arc guide plate 2, so that the bell mouth of the water pump can be firmly seated in the bracket. This design ensures that all water flows entering the water suction bell mouth 5 are rectified by the arc guide plate 2, thereby ensuring the stable flow state of the water flow and further improving the efficiency and performance of the water pump.

[0052] The number of the arc-shaped guide plates 2 is 5 to 7.

[0053] The arc-shaped guide plates 2 within this number range can reasonably disperse the water flow before entering the impeller, making the flow pattern more uniform and reducing the local high-speed or low-speed areas, thereby improving the water absorption performance and operation stability of the pump. Each arc-shaped guide plate 2 can play a role without interfering with each other, ensuring smooth water flow.

[0054] Moreover, the configuration of 5 to 7 arc-shaped guide plates 2 not only provides sufficient water flow control force, but also ensures the structural strength and rigidity of the overall support guide frame, which can effectively resist various dynamic loads that may be encountered during the operation of the pump and extend its service life.

[0055] The arc-shaped guide plate 2 is a streamlined symmetrical structure with a thick outer side and a thin inner side.

[0056] The design of the arc-shaped guide plate 2 being thick on the outside and thin on the inside makes the water flow more uniform when entering the impeller, and reduces the occurrence of eddy currents and turbulence, thereby improving the efficiency of the water pump. In addition, this design also provides sufficient structural strength to withstand water flow impact and unit vibration, and provides support for the bell mouth, ensuring the long-term stable operation of the pump.

[0057] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0058] 1. In the embodiment of the utility model, the support guide frame includes: a bottom support, an arc guide plate, a retaining ring and a guide cone; the central axes of the bottom support, the arc guide plate, the retaining ring and the guide cone coincide; the guide cone and a plurality of arc guide plates are arranged on the bottom support; the arc guide plates are arranged in a circular array around the guide cone, the arc guide plates are fitted and fixed to the guide cone, and the arc guide plates and the guide cone have the same height; the retaining ring is fixed on the top of the arc guide plate; the water suction bell mouth is placed on the arc guide plate and is located in the retaining ring; the support guide frame provides stable support for the water suction bell mouth through the evenly arranged arc guide plates, prevents the water suction bell mouth from vibrating, and improves the running stability of the water pump; the design of the guide cone and the arc guide plate takes into account the principles of fluid dynamics, so that the water flow can enter the impeller evenly and smoothly, avoids the pre-rotation phenomenon of the water flow near the water suction bell mouth before entering the impeller, optimizes the inlet angle of the water flow entering the impeller, thereby improving the running efficiency and stability of the water pump.

[0059] 2. In the embodiment of the utility model, the water guide cone with a hyperbolic design can effectively adapt to the water flow distribution near the water suction bell mouth and evenly guide the water flow to the impeller, thereby forming a stable flow field and reducing turbulence. This helps to reduce flow losses and improve the water suction efficiency of the pump.

[0060] At the same time, this shape of water guide cone and arc-shaped guide plate helps to reduce or eliminate vortices that may be generated near the water suction bell mouth, and suppress the pre-rotation effect caused by the high-speed rotation of the impeller, thereby improving the stability and efficiency of the water pump operation.

[0061] 3. In the embodiment of the utility model, the inner diameter of the retaining ring is slightly larger than the diameter of the water suction bell mouth, so that the retaining ring does not contact the water suction bell mouth, reducing the vibration of the water pump causing the retaining ring and the water suction bell mouth to collide and cause wear or damage, and leaving a certain inner diameter margin is also beneficial to the tolerance control in the manufacturing process, as well as the convenience during assembly and maintenance; the retaining ring is designed to be higher than the arc guide plate, so that the bell mouth of the water pump can be firmly seated in the bracket. This design ensures that all water flows entering the water suction bell mouth are rectified by the arc guide plate, thereby ensuring the stable flow state of the water flow and further improving the efficiency and performance of the water pump.

[0062] 4. In the embodiment of the utility model, the design of the arc-shaped guide plate with a thick outer side and a thin inner side makes the water flow more uniform when entering the impeller, and reduces the occurrence of vortex and turbulence, thereby improving the efficiency of the water pump. In addition, this design also provides sufficient structural strength to withstand water flow impact and unit vibration, and provides support for the bell mouth, ensuring the long-term stable operation of the pump.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A support guide frame for a vertical axial flow pump water suction bell mouth, characterized in that: The supporting guide frame comprises: a bottom support (1), an arc-shaped guide plate (2), a retaining ring (3) and a guide cone (4); The central axes of the bottom support (1), the arc-shaped guide plate (2), the retaining ring (3) and the guide cone (4) coincide with each other; The guide cone (4) and a plurality of arc-shaped guide plates (2) are arranged on the bottom support (1); The arc-shaped guide plates (2) are arranged in a circular array around the guide cone (4), the arc-shaped guide plates (2) and the guide cone (4) are fitted and fixed, and the arc-shaped guide plates (2) and the guide cone (4) have the same height; The retaining ring (3) is fixed on the top of the arc-shaped guide plate (2); The water suction bell mouth (5) is placed on the arc-shaped guide plate (2) and is located inside the retaining ring (3).

2. The support guide frame for the water suction bell mouth of a vertical axial flow pump according to claim 1, characterized in that: The height of the arc-shaped guide plate (2) and the guide cone (4) is h=(0.6-0.8)D; Wherein D is the bottom diameter of the water suction bell mouth (5).

3. The support guide frame for the water suction bell mouth of a vertical axial flow pump according to claim 1, characterized in that: A rectangular coordinate system is established with the center of the bottom surface of the water suction bell mouth (5) as the origin, and the generatrix equation of the guide cone (4) is: Wherein, h is the height of the guide cone (4); D is the bottom diameter of the water suction bell mouth (5).

4. The support guide frame for the water suction bell mouth of a vertical axial flow pump according to claim 1, characterized in that: The inner diameter of the retaining ring (3) is slightly larger than the bottom diameter of the water suction bell mouth (5), and the top of the retaining ring (3) is higher than the top of the arc-shaped guide plate (2).

5. The support guide frame for the water suction bell mouth of a vertical axial flow pump as claimed in claim 4, characterized in that: The inner diameter d of the retaining ring (3) is (1.05-1.08)D; the top of the retaining ring (3) is 100-300 mm higher than the top of the arc-shaped guide plate (2).

6. The support guide frame for the water suction bell mouth of a vertical axial flow pump according to claim 1, characterized in that: The number of the arc-shaped guide plates (2) is 5 to 7.

7. The support guide frame for the water suction bell mouth of a vertical axial flow pump according to claim 1, characterized in that: The arc-shaped guide plate (2) is a streamlined symmetrical structure with a thick outer side and a thin inner side.

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