Centrifugal pump impeller structure

Abstract

The utility model provides a kind of centrifugal pump impeller structure, it is related to centrifugal pump impeller technical field, and it includes: impeller back cover plate and impeller blade, the impeller back cover plate front surface welding has impeller blade, the impeller back cover plate outside ring surface end sleeve is connected with transmission outer ring piece, the transmission outer ring piece front surface is past guide flow boss and the outside end surface of impeller blade is attached, the transmission outer ring piece outside ring surface is equipped with the clamping groove, the transmission outer ring piece is past clamping groove and is attached with impurity removal scraper, the clamping groove groove surface is welded with fixed stud, the impurity removal scraper one side is provided with extension end plate, the extension end plate is screw-connected with fixed stud by fastening nut. The utility model solves the problem that brush head added in the prior art impeller disc side end can easily increase impeller rotation resistance, affect centrifugal pump operating efficiency.

Description

Technical Field

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

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. The impeller is the core component of a centrifugal pump; it rotates at high speeds and delivers large outputs. The blades on the impeller play a major role, and the inner and outer surfaces of the impeller must be smooth to reduce frictional damage from the water flow. A search revealed an existing technology (publication number: CN202222509309.6) describing a self-balancing axial force centrifugal pump impeller structure. The description states that "this self-balancing axial force centrifugal pump impeller structure, through the addition of a brush head, drives the first and second impeller discs to rotate synchronously, thus brushing away impurities from the inner wall surface of the centrifugal pump. Furthermore, due to the presence of a limit ratchet plate and locking teeth, when the first and second impeller discs rotate, the U-shaped transmission frame and connecting rod are constantly moved outwards by a spring, ensuring that the brush head remains in close contact with the inner wall of the centrifugal pump, improving the quality of impurity removal." However, the brush head added to the side of the impeller disc in this existing technology easily increases the impeller's rotational resistance, affecting the operating efficiency of the centrifugal pump. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a centrifugal pump impeller structure is provided to solve the problem that the brush head added to the side of the impeller disc in existing technologies easily increases the impeller rotation resistance and affects the operating efficiency of the centrifugal pump.

[0004] To achieve the above objectives, a centrifugal pump impeller structure is provided, comprising: an impeller rear cover plate and impeller blades, wherein the impeller blades are welded to the front surface of the impeller rear cover plate.

[0005] A transmission outer ring is sleeved on the outer annular end of the impeller rear cover plate. The front surface of the transmission outer ring is in contact with the outer end face of the impeller blade through a guide protrusion. A snap-fit ​​groove is opened on the outer annular surface of the transmission outer ring. A cleaning scraper is attached to the transmission outer ring through the snap-fit ​​groove. A fixing stud is welded to the groove surface of the snap-fit ​​groove. An extension end plate is provided on one side of the cleaning scraper. The extension end plate is screwed to the fixing stud by a fastening nut.

[0006] Furthermore, an impeller hub is provided in the middle of the impeller rear cover plate; and the impeller rear cover plate is connected to the centrifugal pump shaft through the impeller hub.

[0007] Furthermore, the impeller blades are circumferentially distributed on the front surface of the impeller rear cover plate; and the impeller blades are twisted in shape.

[0008] Furthermore, the inner end of the transmission outer ring is screwed to the impeller rear cover plate via an inner ring plate; and the inner ring plate is embedded and fitted into the groove surface on the rear side of the impeller rear cover plate.

[0009] Furthermore, the inner ring plate has fixing holes on its surface; and bolt posts are connected inside the fixing holes.

[0010] Furthermore, the flow bumps are streamlined and are distributed on the outer ends of the impeller blades.

[0011] Furthermore, an extended end plate is snapped into the snap-fit ​​groove, and the impurity removal scraper is tangentially distributed along the edge of the impeller blade.

[0012] The beneficial effects of this utility model are as follows: The centrifugal pump impeller structure utilizes a transmission outer ring fixedly installed on the outer end face of the impeller rear cover plate. By screwing multiple sets of cleaning scrapers into the corresponding slots of the transmission outer ring, the outer ends of the cleaning scrapers, which rotate with the impeller, scrape away impurities adhering to the inner cavity of the centrifugal pump. This helps to prevent the accumulation of impurities in the pump cavity from hindering the stable operation of the centrifugal pump impeller and ensures that the cleaning scrapers can effectively clean impurities for a long time. Through the guide protrusion at the front end of the transmission outer ring and the cleaning scrapers distributed along the tangential direction of the blades, the resistance of the overall structure of the centrifugal pump impeller is reduced, facilitating the diffusion of auxiliary liquid from the center of the centrifugal pump impeller outward and improving the operating efficiency of the centrifugal pump impeller structure. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the centrifugal pump impeller structure according to an embodiment of the present utility model.

[0014] Figure 2 This is a front view cross-sectional structural diagram of the impeller scraper structure according to an embodiment of the present utility model.

[0015] Figure 3 This is a front view partial cross-sectional diagram of the impeller scraper structure according to an embodiment of the present invention.

[0016] Figure 4 This is a front view of the impeller scraper structure according to an embodiment of the present utility model.

[0017] In the figure: 1. Impeller rear cover plate; 2. Impeller blade; 3. Impeller hub; 4. Transmission outer ring; 41. Guide protrusion; 42. Inner ring plate; 43. Fixing hole; 44. Snap-fit ​​groove; 45. Fixing stud; 5. Impurity removal scraper; 51. Fastening nut; 52. Extension end plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1 to 4 As shown, this utility model provides a centrifugal pump impeller structure, including: an impeller rear cover plate 1 and impeller blades 2, wherein the impeller blades 2 are welded to the front surface of the impeller rear cover plate 1.

[0020] A transmission outer ring 4 is sleeved on the outer annular end of the impeller rear cover plate 1. The front surface of the transmission outer ring 4 is in contact with the outer end face of the impeller blade 2 through the guide protrusion 41. A snap-fit ​​groove 44 is opened on the outer annular surface of the transmission outer ring 4. A cleaning scraper 5 is attached to the transmission outer ring 4 through the snap-fit ​​groove 44. A fixing stud 45 is welded to the groove surface of the snap-fit ​​groove 44. An extension end plate 52 is provided on one side of the cleaning scraper 5. The extension end plate 52 is screwed to the fixing stud 45 through a fastening nut 51.

[0021] The centrifugal pump impeller structure utilizes a transmission outer ring 4 fixedly installed on the outer end face of the impeller rear cover plate 1. By screwing multiple sets of cleaning scrapers 5 into the corresponding slots 44 of the transmission outer ring 4, the outer ends of the cleaning scrapers 5, which rotate with the impeller, scrape away impurities adhering to the inner cavity of the centrifugal pump. This helps to prevent the accumulation of impurities in the pump cavity from hindering the stable operation of the centrifugal pump impeller, ensuring that the cleaning scrapers can effectively clean impurities for a long time. Furthermore, the guide protrusions 41 that continue the streamline shape of the impeller blades 2 and the cleaning scrapers 5 distributed along the tangential direction of the blades reduce the resistance of the overall structure of the centrifugal pump impeller, facilitate the diffusion of auxiliary liquid from the center of the centrifugal pump impeller outward, and improve the operating efficiency of the centrifugal pump impeller structure.

[0022] In this embodiment, an impeller hub 3 is provided in the middle of the impeller rear cover plate 1; and the impeller rear cover plate 1 is connected to the centrifugal pump shaft through the impeller hub 3. The impeller blades 2 are circumferentially distributed on the front surface of the impeller rear cover plate 1; and the impeller blades 2 are twisted.

[0023] As a preferred implementation, the impeller rear cover plate 1 has holes drilled into its surface to make the liquid flow more smoothly through the impeller, reducing eddies and foam generation, thereby improving pump efficiency and service life. The impeller hub 3 facilitates the overall fixing of the impeller to the centrifugal pump shaft, enabling power transmission. The impeller blades 2 apply energy to the liquid through high-speed rotation, achieving efficient liquid transport; the twisted shape design reduces the load on the impeller blades 2.

[0024] In this embodiment, the inner end of the transmission outer ring 4 is screwed to the impeller rear cover plate 1 via an inner ring plate 42; and the inner ring plate 42 is embedded and fitted into the rear groove surface of the impeller rear cover plate 1. The surface of the inner ring plate 42 is provided with a fixing hole 43; and a bolt post is connected inside the fixing hole 43.

[0025] As a preferred embodiment, the transmission outer ring 4 is screwed to the outer end face of the impeller rear cover plate 1, which facilitates the installation of the impurity removal scraper 5 between the pump cavity and the impeller, so that the impurity removal scraper 5 rotates with the high-speed rotation of the impeller to slide the impurities and dirt attached to the pump cavity.

[0026] In this embodiment, the guide protrusion 41 is streamlined and is distributed at the outer end of the impeller blade 2. An extension end plate 52 is snapped into the slot 44, and the impurity removal scraper 5 is tangentially distributed along the edge of the impeller blade 2.

[0027] As a preferred embodiment, the streamlined guide protrusion 41 is a continuation of the twisted shape of the impeller blade 2. The guide protrusion 41 and the impurity removal scraper 5 reduce the liquid flow resistance on the transmission outer ring 4, assist the liquid to diffuse outward from the center of the centrifugal pump impeller, and improve the operating efficiency of the centrifugal pump impeller structure.

[0028] The centrifugal pump impeller structure of this utility model can effectively solve the problem in the prior art where the brush head added to the side of the impeller disk easily increases the impeller rotation resistance and affects the operating efficiency of the centrifugal pump. It can help avoid the accumulation of impurities in the pump cavity, which hinders the stable operation of the centrifugal pump impeller, ensure that the impurity removal scraper can effectively clean impurities for a long time, reduce the resistance of the overall structure of the centrifugal pump impeller, facilitate the diffusion of auxiliary liquid from the center of the centrifugal pump impeller outward, and improve the operating efficiency of the centrifugal pump impeller structure. It is applicable to centrifugal pump impeller structures.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump impeller structure, comprising: Impeller rear cover plate (1) and impeller blades (2), wherein the impeller rear cover plate (1) is welded with impeller blades (2) on its front surface, characterized in that: The outer ring of the impeller rear cover plate (1) is fitted with a transmission outer ring (4). The front surface of the transmission outer ring (4) is in contact with the outer end face of the impeller blade (2) through a guide protrusion (41). The outer ring of the transmission outer ring (4) is provided with a snap-fit ​​groove (44). The transmission outer ring (4) is attached to a cleaning scraper (5) through the snap-fit ​​groove (44). A fixing stud (45) is welded to the groove surface of the snap-fit ​​groove (44). An extension end plate (52) is provided on one side of the cleaning scraper (5). The extension end plate (52) is screwed to the fixing stud (45) through a fastening nut (51).

2. The centrifugal pump impeller structure according to claim 1, characterized in that, The impeller rear cover plate (1) is provided with an impeller hub (3) in the middle; and the impeller rear cover plate (1) is connected to the centrifugal pump shaft through the impeller hub (3).

3. The centrifugal pump impeller structure according to claim 1, characterized in that, The impeller blades (2) are circumferentially distributed on the front surface of the impeller rear cover plate (1); and the impeller blades (2) are twisted.

4. The centrifugal pump impeller structure according to claim 1, characterized in that, The inner end of the transmission outer ring (4) is screwed to the impeller rear cover plate (1) through the inner ring plate (42); and the inner ring plate (42) is embedded and fitted to the rear groove surface of the impeller rear cover plate (1).

5. The centrifugal pump impeller structure according to claim 4, characterized in that, The inner ring plate (42) has a fixing hole (43) on its surface; and a bolt post is connected inside the fixing hole (43).

6. The centrifugal pump impeller structure according to claim 1, characterized in that, The guide bump (41) is streamlined and is distributed on the outer end of the impeller blade (2).

7. The centrifugal pump impeller structure according to claim 1, characterized in that, The extension end plate (52) is snapped into the slot (44), and the impurity removal scraper (5) is tangentially distributed along the edge of the impeller blade (2).

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