Anti-creep deep well pump

Abstract

The utility model discloses a kind of anti-creep deep-well pumps, the hub back of impeller is provided with the centrifugal stabilizing structure extending from radial outer side to radial inner side, back center is provided with anti-creep small impeller, the hub front of anti-creep small impeller is provided with the centrifugal stabilizing structure extending from radial inner side to radial outer side;The hub back of guide vane is provided with multistage step surface, backflow structure is arranged on step outer side, wherein centrifugal stabilizing structure, anti-creep small impeller, centrifugal stabilizing structure, backflow structure form microcirculation flow path;Anti-creep small impeller includes straight plate blade on import side and bent twisted blade on export side;Centrifugal stabilizing structure is curve structure's overcurrent rib plate;Centrifugal stabilizing structure is curve structure's guide groove;Backflow structure is straight line structure overcurrent recess. Due to the improvement to impeller and guide vane structure, reduce creep and optimize energy-saving water-saving performance to improve working condition performance, efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery technology, specifically to a deep well pump with anti-slip properties. Background Technology

[0002] Deep well pumps are widely used in various industries and are among their main energy-consuming equipment. With the growing demand for cost reduction and efficiency improvement, the requirements for energy-saving retrofitting of high-power deep well pumps are becoming increasingly stringent. The most effective way to save energy is to improve pump efficiency. The stability design of the pump impeller and guide vanes directly affects the pump's efficiency. Based on flow field analysis experience, adopting a reasonable guide vane and impeller structure can significantly reduce the pump's axial movement, while also optimizing energy and water saving performance and improving efficiency. Therefore, optimizing the design of deep well pump impellers and guide vanes is essential.

[0003] Existing impeller and guide vane structures have design limitations, only involving the design of some non-standard impeller and guide vane structures without fundamentally changing the related structure. This results in poor adaptability, significant axial movement, poor energy and water saving performance, and low efficiency. Therefore, to address these problems, the applicant proposes an anti-axial movement deep well pump to solve the aforementioned issues, reduce axial movement, optimize energy and water saving performance, and thus improve operating performance and efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a deep well pump designed to prevent cross-flow.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A deep well pump with anti-cavitation features includes an inlet section, a pump shaft, impellers, guide vanes, and an outlet section. Two or more stages of impellers and guide vanes are connected in series via the pump shaft to form an inlet section and an outlet section, forming the deep well pump. The impellers and guide vanes are arranged in a multi-stage series staggered arrangement. The pump is characterized by: a centripetal stabilizing structure extending radially outward and radially inward on the back of the impeller hub; an anti-cavitation small impeller at the center of the back; and a centrifugal stabilizing structure extending radially inward and radially outward on the front of the hub of the anti-cavitation small impeller. The guide vane hub has a multi-stage stepped surface on its back. It includes an inner and outer side of the step. A reflux structure is provided on the outer side of the step. The inner side of the step is sealed to the back of the hub of the anti-cavitation impeller by a sealing ring. The centripetal stabilization structure, the anti-cavitation impeller, the centrifugal stabilization structure, and the reflux structure form a micro-circulation flow path to prevent axial movement of the impeller and guide vanes. The anti-cavitation impeller includes straight blades on the inlet side and bent blades on the outlet side. The centripetal stabilization structure is a curved flow rib. The centrifugal stabilization structure is a curved guide groove. The reflux structure is a straight flow groove.

[0007] Furthermore, the axial length of the straight blade is H1, and the axial length of the twisted blade is H2, where H1 < H2.

[0008] Furthermore, H2 = (1.2 ~ 1.8)H1.

[0009] Furthermore, the back of the hub of the anti-slip impeller is provided with multiple concentric first sealing rings, and the inner side of the step is provided with multiple concentric second sealing rings, wherein the first sealing rings and the second sealing rings are arranged in an overlapping manner.

[0010] Furthermore, the axial height of the first sealing ring decreases first and then increases from the radially outer side to the radially inner side, while the axial height of the second sealing ring increases first and then decreases from the radially outer side to the radially inner side.

[0011] Furthermore, the number of blades in a straight blade is not the same as the number of blades in a twisted blade.

[0012] Furthermore, the number of blades in a twisted blade is (2 to 5) times that of a straight blade.

[0013] Furthermore, the central contour of the curved flow ribs and guide channels is part of an Archimedean spiral or a hyperbola.

[0014] Furthermore, the reflux structure is evenly distributed in the circumferential direction on the outer side of the step, and its inlet is connected to the outlet of the anti-channeling impeller.

[0015] This utility model has the following advantages compared with the prior art:

[0016] 1. The impeller hub has a centripetal stabilizing structure extending radially outward to radially inward on its back side, and an anti-cavitation impeller is located at the center of the back side. The anti-cavitation impeller hub has a centrifugal stabilizing structure extending radially inward to radially outward on its front side. The guide vane hub has a multi-stage stepped surface on its back side, including an inner and outer stepped surface. A reflux structure is located on the outer stepped surface. The centripetal stabilizing structure, the anti-cavitation impeller, the centrifugal stabilizing structure, and the reflux structure form a micro-circulation flow path, which effectively prevents the impeller and guide vane from axially cavitating.

[0017] 2. Considering the importance of optimizing the loop structure for efficient flow, the anti-channeling impeller in this invention includes straight blades on the inlet side and curved blades on the outlet side; the centripetal stabilizing structure is a curved flow rib; the centrifugal stabilizing structure is a curved guide channel; and the reflux structure is a straight flow groove. The central contour lines of the curved flow ribs and guide channels are part of an Archimedean spiral or a hyperbola. These structures are optimized designs taking into account the working environment of the deep well pump, greatly reducing channeling and optimizing energy and water saving performance, thereby improving operating performance and efficiency.

[0018] 3. The inner side of the step is sealed to the back of the hub of the anti-slip impeller by a sealing ring. The back of the hub of the anti-slip impeller is provided with multiple concentric first sealing rings, and the inner side of the step is provided with multiple concentric second sealing rings. The first sealing ring and the second sealing ring are arranged in an overlapping manner, which makes the impeller and guide vane run more stably and reduces the occurrence of slippage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the axial cross-sectional structure of a deep well pump in the prior art;

[0020] Figure 2 This is a schematic diagram of the improved structure of the impeller 3 and guide vane 4 in this utility model;

[0021] Figure 3 This is a schematic diagram showing the relative relationship between the anti-slip impeller 6 and the centripetal stabilizing structure 7 in this utility model;

[0022] Figure 4 This is a schematic diagram showing the relative relationship between the anti-channeling impeller 6 and the centrifugal stabilizing structure 8 in this utility model;

[0023] Figure 5 This is a schematic diagram of the axial cross-sectional structure of the recirculation structure 9 in this utility model.

[0024] In the diagram: 1. Inlet section; 2. Pump shaft; 3. Impeller; 4. Guide vane; 5. Outlet section; 6. Anti-channel impeller; 7. Centrifugal stabilizing structure; 8. Recirculation structure; 9. Inner side of step; 10. Outer side of step; 11. Straight blade; 12. Twisted blade; 13. First sealing ring; 14. Second sealing ring; 15. Axial length H1 of straight blade 12; Axial length H2 of twisted blade 13; Arrows "→, ←, ↑, ↓" indicate liquid flow direction / flow state. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] like Figure 1-5As shown, a deep well pump with anti-cavitation features includes an inlet section 1, a pump shaft 2, impellers 3, guide vanes 4, and an outlet section 5. Two or more stages of impellers 3 and guide vanes 4 are connected in series via the pump shaft 2 to form an inlet section 1 and an outlet section 5, forming a deep well pump. The impellers 3 and guide vanes 4 are arranged in a multi-stage series staggered arrangement. The pump is characterized by: a centripetal stabilizing structure 7 extending radially outward and radially inward on the back of the impeller 3's hub; an anti-cavitation small impeller 6 located at the center of the back; and a centrifugal stabilizing structure 8 extending radially inward and radially outward on the front of the hub of the anti-cavitation small impeller 6. The back of the guide vane 4's hub has a multi-stage stepped surface, including... The inner side 10 and outer side 11 of the step are provided. A return flow structure 9 is provided on the outer side 11 of the step. The inner side 10 of the step is sealed to the back of the hub of the anti-cavitation impeller 6 through a sealing ring. The centripetal stabilizing structure 7, the anti-cavitation impeller 6, the centrifugal stabilizing structure 8, and the return flow structure 9 form a micro-circulation flow path to prevent the impeller 3 and the guide vane 4 from axial movement. The anti-cavitation impeller 6 includes a straight plate-shaped blade 12 on the inlet side and a bent and twisted blade 13 on the outlet side. The centripetal stabilizing structure 7 is a flow rib with a curved structure. The centrifugal stabilizing structure 8 is a flow guide groove with a curved structure. The return flow structure 9 is a flow groove with a straight structure.

[0028] Furthermore, the axial length of the straight blade 12 is H1, and the axial length of the twisted blade 13 is H2, where H1 < H2.

[0029] Furthermore, H2 = (1.2 ~ 1.8)H1.

[0030] Furthermore, the back of the hub of the anti-slip impeller 6 is provided with multiple concentric first sealing rings 14, and the inner side of the step 10 is provided with multiple concentric second sealing rings 15, wherein the first sealing rings 14 and the second sealing rings 15 are arranged in an overlapping manner.

[0031] Furthermore, the axial height of the first sealing ring 14 first decreases and then increases from the radially outer side to the radially inner side, and the axial height of the second sealing ring 15 first increases and then decreases from the radially outer side to the radially inner side.

[0032] Furthermore, the number of blades in the straight blade 12 is not equal to the number of blades in the twisted blade 13.

[0033] Furthermore, the number of blades in the twisted blade 13 is (2 to 5) times the number of blades in the straight blade 12.

[0034] Furthermore, the central contour of the curved flow ribs and guide channels is part of an Archimedean spiral or a hyperbola.

[0035] Furthermore, the reflux structure 9 is evenly distributed in the circumferential direction of the outer side surface 11 of the step, and its inlet is connected to the outlet of the anti-channeling impeller 6.

[0036] The impeller hub has a centripetal stabilizing structure extending radially outward and radially inward on its back side, and an anti-cavitation impeller is located at the center of the back side. The hub front of the anti-cavitation impeller has a centrifugal stabilizing structure extending radially inward and radially outward. The guide vane hub has a multi-stage stepped surface on its back side, including an inner and outer stepped surface. A reflux structure is located on the outer stepped surface. The centripetal stabilizing structure, the anti-cavitation impeller, the centrifugal stabilizing structure, and the reflux structure form a micro-circulation flow path, which effectively prevents the impeller and guide vane from axially cavitating.

[0037] Given the importance of optimizing the loop structure for efficient flow, the anti-channeling impeller in this invention includes straight blades on the inlet side and curved blades on the outlet side; the centripetal stabilizing structure is a curved flow rib; the centrifugal stabilizing structure is a curved guide channel; and the reflux structure is a straight flow groove. The central contour lines of the curved flow ribs and guide channels are part of an Archimedean spiral or a hyperbola. These structures are optimized designs considering the working environment of the deep well pump, greatly reducing channeling and optimizing energy and water saving performance, thereby improving operating performance and efficiency.

[0038] The inner side of the step is sealed to the back of the hub of the anti-slip impeller by a sealing ring. The back of the hub of the anti-slip impeller is provided with multiple concentric first sealing rings, and the inner side of the step is provided with multiple concentric second sealing rings. The first sealing rings and the second sealing rings are arranged in an overlapping manner, which makes the impeller and guide vane run more stably and reduces the occurrence of slippage.

[0039] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. It is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep well pump with anti-slip mechanism, comprising an inlet section (1), a pump shaft (2), impellers (3), guide vanes (4), and an outlet section (5), wherein two or more stages of impellers (3) and guide vanes (4) are connected in series via the pump shaft (2) to form an inlet section (1) and an outlet section (5) to form a deep well pump, wherein the impellers (3) and guide vanes (4) are arranged in a multi-stage series staggered manner; characterized in that: The impeller (3) has a centripetal stabilizing structure (7) extending radially outward to radially inward on the back of its hub, and an anti-cavitation impeller (6) is provided at the center of its back. The anti-cavitation impeller (6) has a centrifugal stabilizing structure (8) extending radially inward to radially outward on the front of its hub. The guide vane (4) has a multi-stage stepped surface on its back of its hub, including an inner stepped surface (10) and an outer stepped surface (11). A reflux structure (9) is provided on the outer stepped surface (11). The inner stepped surface (10) and the anti-cavitation impeller (6) are connected by a centrifugal stabilizing structure (8) extending radially outward. The back of the hub is sealed by a sealing ring. The centripetal stabilizing structure (7), the anti-slip impeller (6), the centrifugal stabilizing structure (8), and the reflux structure (9) form a micro-circulation flow path to prevent the impeller (3) and the guide vane (4) from moving axially. The anti-slip impeller (6) includes a straight blade (12) on the inlet side and a bent blade (13) on the outlet side. The centripetal stabilizing structure (7) is a flow rib with a curved structure. The centrifugal stabilizing structure (8) is a flow guide groove with a curved structure. The reflux structure (9) is a flow groove with a straight structure.

2. The anti-slip deep well pump as described in claim 1, characterized in that, The axial length of the straight blade (12) is H1, and the axial length of the twisted blade (13) is H2, where H1 < H2.

3. The anti-slip deep well pump as described in claim 2, characterized in that, H2 = (1.2 ~ 1.8) H1.

4. The anti-slip deep well pump as described in claim 1, characterized in that, The back of the hub of the anti-slip impeller (6) is provided with a first sealing ring (14) with multiple concentric rings, and the inner side of the step (10) is provided with a second sealing ring (15) with multiple concentric rings, wherein the first sealing ring (14) and the second sealing ring (15) are arranged in an overlapping manner.

5. The anti-slip deep well pump as described in claim 4, characterized in that, The axial height of the first sealing ring (14) tends to decrease first and then increase from the radial outer side to the radial inner side, while the axial height of the second sealing ring (15) tends to increase first and then decrease from the radial outer side to the radial inner side.

6. The anti-slip deep well pump as described in claim 1, characterized in that, The number of blades in the straight blade (12) is not the same as the number of blades in the twisted blade (13).

7. The anti-slip deep well pump as described in claim 6, characterized in that, The number of blades in the twisted blade (13) is (2 to 5) times that in the straight blade (12).

8. The anti-slip deep well pump as described in claim 1, characterized in that, The central outline of the curved flow ribs and guide channels is part of an Archimedean spiral or a hyperbola.

9. The anti-slip deep well pump as described in claim 1, characterized in that, The reflux structure (9) is evenly distributed on the outer side (11) of the step in the circumferential direction, and its inlet is connected to the outlet of the anti-channel impeller (6).

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