Curved flow cast iron pump impeller

Abstract

The utility model discloses a cast iron pump impeller of curved surface flow guide relates to impeller technical field. A cast iron pump impeller of curved surface flow guide, including support cylinder, front cover and back cover, support cylinder fixed connection is in the top of front cover, and back cover fixed connection is in the top of support cylinder, can change the flowing state of fluid on the blade surface through the flow guide groove and fixed flow guide strip of blade outer surface opening, in the fluid flowing process, flow guide groove and flow guide strip play the role of guiding and carding to fluid, reduce the friction resistance between fluid and blade surface, make fluid can more smoothly along the blade surface flow, simultaneously, this special'V'shape structure can destroy fluid boundary layer, reduce boundary layer separation phenomenon, make fluid in the inside of impeller, namely the flow guide way between multiple blades form more stable, orderly flow, thereby effectively improve the flowing efficiency of fluid, and the hydraulic efficiency of pump is greatly promoted.

Description

Technical Field

[0001] This utility model relates to the field of impeller technology, and in particular to a cast iron pump impeller with curved flow guidance. Background Technology

[0002] In the field of fluid transportation, cast iron pumps are key equipment and are widely used in many scenarios such as industry, agriculture, and municipal administration. Their performance directly affects the system's operating efficiency, energy consumption, and stability. As the core component of cast iron pumps, the design and structure of the impeller plays a decisive role in the overall performance of the pump.

[0003] Traditional cast iron pump impellers have relatively smooth and flat blade surfaces during long-term use, lacking effective flow guiding structures. When fluid enters the impeller and flows on the blade surface, due to the boundary layer effect, a large frictional resistance is generated between the fluid and the blade surface. This frictional resistance not only consumes the fluid's energy, leading to a reduction in pump head and flow rate, but also causes the fluid to form a turbulent flow state on the blade surface, increasing energy loss and thus reducing the pump's hydraulic efficiency. Therefore, we propose a cast iron pump impeller with curved flow guiding. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a cast iron pump impeller with curved flow guidance. This invention can solve the problem that in the long-term use of traditional cast iron pump impellers, the impeller blade surface is relatively smooth and flat, lacking an effective flow guidance structure. When the fluid enters the impeller and flows on the blade surface, due to the boundary layer effect, a large frictional resistance is generated between the fluid and the blade surface. This frictional resistance not only consumes the fluid's energy, leading to a reduction in the pump's head and flow rate, but also causes the fluid to form a turbulent flow state on the blade surface, increasing energy loss and thus reducing the pump's hydraulic efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cast iron pump impeller with curved flow guidance, comprising:

[0006] The support cylinder, the front cover plate, and the rear cover plate are fixedly connected to the top of the front cover plate and the rear cover plate is fixedly connected to the top of the support cylinder.

[0007] Multiple blades are fixedly connected to the top of the front cover plate, and guide channels are provided between the multiple blades. Multiple guide grooves are opened on the outer surface of the multiple blades, and multiple guide strips are fixedly connected to the outer surface of the multiple blades. A shaft hole two is opened inside the support cylinder. A shaft hole one communicating with the inside of shaft hole two is opened on both the front cover plate and the rear cover plate. Multiple threaded holes are opened on the side of the rear cover plate away from the front cover plate.

[0008] Preferably, a fixing seat is fixedly connected to the side of the rear cover plate away from the front cover plate, and the fixing seat is located outside of multiple threaded holes.

[0009] Preferably, the cross-sections of the plurality of guide grooves and the plurality of guide strips are all "V" shaped structures.

[0010] Preferably, the rear cover plate has a tapered structure on the side away from the front cover plate.

[0011] Preferably, the plurality of blades are arranged in a circular array on the front cover plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This curved-surface guide cast iron pump impeller, through the guide grooves and fixed guide strips on the outer surface of the blades, can change the flow state of the fluid on the blade surface. During the fluid flow process, the guide grooves and guide strips guide and organize the fluid, reducing the frictional resistance between the fluid and the blade surface, allowing the fluid to flow more smoothly along the blade surface. At the same time, this special "V" shaped structure can disrupt the fluid boundary layer, reduce boundary layer separation, and make the fluid form a more stable and orderly flow inside the impeller, that is, in the guide channels between multiple blades, thereby effectively improving the fluid flow efficiency and significantly improving the pump's hydraulic efficiency. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the support cylinder structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the blade structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the flow guide channel structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the guide strip structure of this utility model.

[0020] Reference numerals in the attached drawings: 1. Front cover plate; 2. Rear cover plate; 3. Blade; 4. Fixing base; 5. Shaft hole one; 6. Support cylinder; 7. Guide strip; 8. Guide groove; 9. Threaded hole; 10. Guide channel; 11. Shaft hole two. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 utility model.

[0023] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Please see Figure 1-5 This utility model provides a technical solution: a cast iron pump impeller with curved flow guidance, comprising:

[0026] The support cylinder 6, the front cover plate 1, and the rear cover plate 2 are fixedly connected to the top of the front cover plate 1 and the rear cover plate 2 is fixedly connected to the top of the support cylinder 6.

[0027] Multiple blades 3 are fixedly connected to the top of the front cover plate 1. A guide channel 10 is provided between the multiple blades 3. Multiple guide grooves 8 are opened on the outer surface of the multiple blades 3. Multiple guide strips 7 are fixedly connected to the outer surface of the multiple blades 3. A shaft hole 2 11 is opened inside the support cylinder 6. A shaft hole 1 5 communicating with the inside of the shaft hole 2 11 is opened on both the front cover plate 1 and the rear cover plate 2. Multiple threaded holes 9 are opened on the side of the rear cover plate 2 away from the front cover plate 1.

[0028] A fixing seat 4 is fixedly connected to the side of the rear cover plate 2 away from the front cover plate 1. The fixing seat 4 is located outside of multiple threaded holes 9. The cross-sections of multiple guide grooves 8 and multiple guide strips 7 are all "V" shaped structures. The side of the rear cover plate 2 away from the front cover plate 1 has a conical structure. Multiple blades 3 are arranged in a circular array on the front cover plate 1.

[0029] Furthermore, when using this device, as the impeller rotates at high speed driven by the pump shaft, the fluid enters from the impeller inlet. Multiple blades 3 are arranged in a circular array on the front cover plate 1. The guide channels 10 between the blades 3 provide a flow channel for the fluid. After the fluid enters the guide channels 10, the multiple "V"-shaped cross-section guide grooves 8 and the multiple fixed "V"-shaped cross-section guide strips 7 on the outer surface of the blades 3 begin to function. The "V"-shaped guide grooves 8 and guide strips 7 can change the flow state of the fluid on the surface of the blades 3. During the fluid flow process, the guide grooves 8 and guide strips 7 guide and comb the fluid, reducing the frictional resistance between the fluid and the surface of the blades 3, allowing the fluid to flow more smoothly along the surface of the blades 3. At the same time, this special structure can disrupt the fluid boundary layer, reduce boundary layer separation, and make the fluid form a more stable and orderly flow inside the impeller, thereby improving the fluid flow efficiency.

[0030] By using the guide grooves 8 and fixed guide strips 7 on the outer surface of the blades 3, the flow state of the fluid on the surface of the blades 3 can be changed. During the fluid flow process, the guide grooves 8 and guide strips 7 guide and organize the fluid, reduce the frictional resistance between the fluid and the surface of the blades 3, and enable the fluid to flow more smoothly along the surface of the blades 3. At the same time, this special "V" shaped structure can disrupt the fluid boundary layer and reduce the boundary layer separation phenomenon, so that the fluid forms a more stable and orderly flow inside the impeller, that is, in the guide channel 10 between multiple blades 3, thereby effectively improving the fluid flow efficiency and significantly improving the hydraulic efficiency of the pump.

[0031] Structural Description: Support cylinder 6: It is fixedly connected to the top of the front cover plate 1, and the top is connected to the rear cover plate 2. The shaft hole 11 is opened inside for installing the pump shaft, and it serves to support the front cover plate, the rear cover plate and the blades.

[0032] Front cover plate 1: It is used to fix and connect the support cylinder 6 and multiple blades 3. It has a shaft hole 5 connected to the shaft hole 11 to provide support and installation foundation for the front end of the impeller.

[0033] Rear cover plate 2: fixedly connected to support cylinder 6, with shaft hole 5 and threaded hole 9, and a tapered structure on the side away from front cover plate 1 and fixedly connected to fixed seat 4, providing support and installation interface for the rear end of impeller;

[0034] Fixed base 4: It is fixedly connected to the side of the rear cover plate 2 away from the front cover plate 1, located outside the threaded hole 9, and is used to install and fix the impeller;

[0035] Blade 3: Multiple blades are fixed in a circular array on the top of the front cover plate 1. The outer surface is provided with guide grooves 8 and fixed guide strips 7. The blades form guide channels 10 to promote fluid flow and optimize the flow field through the guide structure.

[0036] Guide groove 8: Multiple grooves are formed on the outer surface of blade 3 with a "V" shaped cross section. They are used to guide and comb the fluid, reduce frictional resistance, and disrupt the boundary layer.

[0037] Guide strips 7: Multiple strips are fixed on the outer surface of blade 3, with a "V" shaped cross section. They work in conjunction with guide grooves 8 to change the fluid flow state and reduce boundary layer separation.

[0038] Shaft hole 2 11: It is opened inside the support cylinder 6 and communicates with shaft hole 1 5 of the front cover plate 1 and the rear cover plate 2 for installing the pump shaft;

[0039] Shaft hole 1 5: It is opened on the front cover plate 1 and the rear cover plate 2, and communicates with the interior of shaft hole 2 11. It is used for the pump shaft to pass through and fix the impeller.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A cast iron pump impeller with curved flow guide, characterized in that, include: Support cylinder (6), front cover plate (1) and rear cover plate (2), the support cylinder (6) is fixedly connected to the top of the front cover plate (1) and the rear cover plate (2) is fixedly connected to the top of the support cylinder (6); Multiple blades (3) are fixedly connected to the top of the front cover plate (1), and a guide channel (10) is provided between the multiple blades (3). Multiple guide grooves (8) are opened on the outer surface of the multiple blades (3), and multiple guide strips (7) are fixedly connected to the outer surface of the multiple blades (3). Among them, the support cylinder (6) has a shaft hole 2 (11) inside, and the front cover plate (1) and the rear cover plate (2) both have a shaft hole 1 (5) that communicates with the inside of the shaft hole 2 (11). The rear cover plate (2) has multiple threaded holes (9) on the side away from the front cover plate (1).

2. The cast iron pump impeller with curved flow guide according to claim 1, characterized in that: The rear cover plate (2) is fixedly connected to a fixing seat (4) on the side away from the front cover plate (1), and the fixing seat (4) is located outside the multiple threaded holes (9).

3. The cast iron pump impeller with curved flow guide according to claim 1, characterized in that: The cross-sections of the multiple flow channels (8) and the multiple flow strips (7) are all "V" shaped.

4. The cast iron pump impeller with curved flow guide according to claim 1, characterized in that: The rear cover plate (2) has a tapered structure on the side away from the front cover plate (1).

5. The cast iron pump impeller with curved flow guide according to claim 1, characterized in that: Multiple blades (3) are arranged in a circular array on the front cover plate (1).

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