A sinking inlet guide vane for a vertical centrifugal pump
By using a combined design with a submerged inlet guide vane, the problem of the fixed guide vane's inability to adjust the flow angle is solved, enabling adaptive adjustment of the fluid flow guiding effect of the vertical centrifugal pump and improving operational stability and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU RONIC FILTER EQUIP CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-21
AI Technical Summary
The guide vanes of existing vertical centrifugal pumps are fixed, which makes it impossible to adjust the guide angle according to changes in the pump's output power, thus affecting the fluid guiding effect.
It adopts a sunken inlet guide vane structure, and through the linkage design of components such as connecting rod, hub, guide vane body, guide vane, helical gear and electric telescopic rod, the tilt angle of the guide vane can be adjusted to adapt to changes in flow velocity.
It improves the fluid guiding effect of vertical centrifugal pumps, enhancing operational stability and efficiency.
Smart Images
Figure CN224533077U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of centrifugal pump technology, specifically a submerged inlet guide vane for a vertical centrifugal pump. Background Technology
[0002] A centrifugal pump is a mechanical device that uses the centrifugal force generated by the rotation of an impeller to transport liquids. It is widely used in industrial, agricultural, municipal, and civil applications. A submersible centrifugal pump is a specially designed type of centrifugal pump. Its core function is the same as a centrifugal pump—to transport and pressurize liquids through the centrifugal force generated by the rotation of an impeller—but its installation method and application scenarios are specific to its design. Vertical centrifugal pumps mainly include a motor, pump body, sealing and bearing system, flow guiding and protection device, and installation and fixing device. The flow guiding device is installed at the inlet of the pump body and is mainly a guide vane. It can guide the liquid into the impeller, reduce flow loss, reduce inlet velocity, improve fluid flow state, and thus improve pump efficiency and operational stability.
[0003] In current technologies, guide vanes are mostly fixed structures. When the output power of a centrifugal pump changes, the rotational speed of its internal shaft and impeller also changes, thereby altering the liquid flow velocity within the pump. Fixed guide vanes cannot adjust their guiding angle according to this change in liquid flow velocity, thus affecting the guide vane's guiding effect on the fluid within the pump.
[0004] Therefore, a submerged inlet guide vane for vertical centrifugal pumps is proposed to address the above problems. Utility Model Content
[0005] To address the shortcomings of existing technologies and the problem that guide vanes are mostly fixed structures, and that when the output power of a centrifugal pump changes, the rotational speed of its internal shaft and impeller also changes, thereby altering the liquid flow velocity within the pump, and that fixed guide vanes cannot adjust their guiding angle accordingly to these changes in liquid flow velocity, thus affecting the guide vane's guiding effect on the fluid within the pump, a submerged inlet guide vane for vertical centrifugal pumps is proposed.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A submerged inlet guide vane for a vertical centrifugal pump, comprising a guide vane body, a hub fixedly connected inside the guide vane body by a connecting rod, the axis of the hub coinciding with the center line of the guide vane body, a plurality of shaft grooves being formed on the outer wall of the hub near the bottom, the plurality of shaft grooves being installed at equal angles along the outer circumference of the hub, a plurality of shaft mounting holes being formed on the lower part of the outer wall of the guide vane body, the plurality of shaft mounting holes being located at the vertical projection of the plurality of shaft grooves, a plurality of guide vanes being installed inside the guide vane body, a first mounting shaft being vertically fixedly connected to one side of the plurality of guide vanes, the outer wall of the first mounting shaft engaging with the inner wall of the shaft groove, a second mounting shaft being fixedly connected to the other side of the guide vanes, the outer wall circular plate of the second mounting shaft being fitted into the shaft mounting hole, and a helical gear being fixedly connected to one end of the second mounting shaft.
[0007] Preferably, a lifting ring is fixed at the center of the outer wall of the flow guide cover, and a linkage rotating ring is suspended at the bottom of the lifting ring via a circular ring.
[0008] Preferably, the bottom of the linkage rotating ring is fitted with a helical gear ring via a circular groove, and the helical gear ring and the helical gear mesh with each other.
[0009] Preferably, the outer wall of the linkage rotating ring is vertically fixed with multiple rotating frames.
[0010] Preferably, a linkage inclined block is vertically fixed to one end sidewall of the rotating frame.
[0011] Preferably, the inclined wall of the linkage block is provided with a sliding rod groove.
[0012] Preferably, an electric telescopic rod is provided below the linkage inclined block, and one end of the electric telescopic rod is vertically fixed to the top surface of the lifting ring.
[0013] Preferably, one end of the electric telescopic rod is fixedly connected to a lifting slide rod, which is slidably installed inside the slide rod groove.
[0014] The beneficial effects of this utility model are: In this invention, the guide vane is installed by the mutual engagement of the first mounting shaft and the second mounting shaft with the shaft mounting hole and the shaft groove, respectively. Furthermore, the shaft mounting method allows the device to change the tilt angle between the guide vane and the guide vane within a certain range by controlling the rotation of the second mounting shaft, so as to adapt to changes in the liquid flow rate in the pump body and ensure the guiding effect of the device on the liquid in the pump body. Attached Figure Description
[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of a partial cross-section of the fairing and the hub in this utility model; Figure 3 This is a perspective view of the guide vane and the linkage rotating ring in this utility model. Figure 4 This is a three-dimensional view of a partially disassembled linkage rotating ring in this utility model; Legend: 1. Draft shield; 2. Hub; 21. Shaft groove; 11. Shaft mounting hole; 3. Draft vane; 31. First mounting shaft; 32. Second mounting shaft; 33. Helical gear; 12. Lifting ring; 4. Linkage rotating ring; 41. Helical gear ring; 42. Rotating frame; 43. Linkage inclined block; 44. Slide bar groove; 5. Electric telescopic rod; 51. Lifting slide bar. Detailed Implementation
[0016] 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0017] Specific implementation examples are given below.
[0018] Please see Figure 1 - Figure 4This utility model provides a submerged inlet guide vane for a vertical centrifugal pump, including a guide vane body 1. A hub 2 is fixedly connected to the inside of the guide vane body 1 via a connecting rod. The axis of the hub 2 coincides with the center line of the guide vane body 1. Multiple shaft grooves 21 are formed on the outer wall of the hub 2 near the bottom. The multiple shaft grooves 21 are installed at equal angles along the outer circumference of the hub 2. Multiple shaft mounting holes 11 are formed on the lower part of the outer wall of the guide vane body 1. The multiple shaft mounting holes 11 are respectively located at the vertical projection of the multiple shaft grooves 21. Multiple guide vanes 3 are installed inside the guide vane body 1. A first mounting shaft 31 is vertically fixed to one side of the multiple guide vanes 3. The outer wall of the first mounting shaft 31 engages with the inner wall of the shaft groove 21. A second mounting shaft 32 is fixed to the other side of the guide vanes 3. The outer wall circular plate of the second mounting shaft 32 is engaged with the shaft groove. Inside the mounting hole 11, a helical gear 33 is fixedly connected to one end of the second mounting shaft 32. The guide shroud 1 is connected to the pump body component through the flanges at both ends with bolts. The guide shroud 1 and the hub 2 are initially connected by a connecting rod. The guide vanes 3 are respectively engaged with the shaft groove 21 and the shaft mounting hole 11 through the first mounting shaft 31 and the second mounting shaft 32. This allows the guide shroud 1 and the hub 2 to cooperate in installing the guide vanes 3, while also increasing the structural stability of the hub 2 inside the guide shroud 1. Furthermore, the shaft mounting method between the guide vanes 3 and the lifting ring 12 allows the tilt angle of the guide vanes 3 inside the guide shroud 1 to be adjusted within a certain range by rotating the second mounting shaft 32. The helical gear 33 is fixed to one end of the second mounting shaft 32 as a linkage structure for the synchronous rotation of each guide vane 3.
[0019] like Figure 1 and Figure 3 As shown, a lifting ring 12 is fixed to the center of the outer wall of the flow guide shroud 1. A linkage rotating ring 4 is suspended from the bottom of the lifting ring 12 by a circular ring. A helical tooth ring 41 is clamped to the bottom of the linkage rotating ring 4 by a circular groove. The helical tooth ring 41 and the helical gear 33 mesh with each other. The linkage rotating ring 4 is installed on the outer wall of the flow guide shroud 1 by the lifting ring 12, which allows the linkage rotating ring 4 to rotate tightly under the restriction of the lifting ring 12. The helical tooth ring 41 installed below the linkage rotating ring 4 meshes with the helical gear 33 of each flow guide blade 3 through its helical teeth. This allows the device to control the synchronous rotation of each flow guide blade 3 by rotating the linkage rotating ring 4, thereby controlling the reverse flow angle of the linkage rotating ring 4.
[0020] like Figure 2 , Figure 3 and Figure 4As shown, multiple rotating frames 42 are vertically fixed to the outer wall of the linkage rotating ring 4. A linkage inclined block 43 is vertically fixed to one side wall of the rotating frame 42. A sliding rod groove 44 is opened on the inclined wall of the linkage inclined block 43. An electric telescopic rod 5 is arranged below the linkage inclined block 43. One end of the electric telescopic rod 5 is vertically fixed to the top surface of the lifting ring 12. A lifting sliding rod 51 is fixed to one end of the electric telescopic rod 5. The lifting sliding rod 51 is slidably installed inside the sliding rod groove 44. The linkage is achieved through the rotating frames 42 on the side wall of the linkage rotating ring 4. The inclined block 43 is installed, and the electric telescopic rod 5 fixed on the top surface of the lifting ring 12 is linked with the sliding rod groove 44 opened in the inclined wall of the linkage inclined block 43 through the lifting slide rod 51. This allows the device to control the overall rotation of the linkage rotating ring 4 within a certain range by raising and lowering the electric telescopic rod 5, thereby driving the helical gear 33 to rotate, realizing the overall synchronous rotation of the guide vanes 3 in the guide shroud 1, changing their tilt angle in the guide shroud 1, adapting to the changes in the liquid flow rate in the pump body, and ensuring the guiding effect of the device on the fluid in the body.
[0021] Working principle: The guide vane 1 is connected to the pump body component via flanges at both ends using bolts. The guide vane 1 and hub 2 are initially connected by a connecting rod. The guide vanes 3 are respectively engaged with the shaft groove 21 and shaft mounting hole 11 via the first mounting shaft 31 and the second mounting shaft 32, respectively. This allows the guide vane 3 to be installed in conjunction with the hub 2, while also increasing the structural stability of the hub 2 within the guide vane 1. Furthermore, the shaft-mounted engagement between the guide vane 3 and the lifting ring 12 allows the tilt angle of the guide vane 3 within the guide vane 1 to be adjusted within a certain range by rotating the second mounting shaft 32. The helical gear 33, as a linkage structure for the synchronous rotation of each guide vane 3, is fixed to one end of the second mounting shaft 32. The linkage rotating ring 4 is installed on the outer wall of the guide vane 1 via the lifting ring 12. This allows the linkage rotating ring 4 to rotate synchronously within the lifting ring 1. Under the constraint of 2, the helical gear ring 41 installed below the linkage rotating ring 4 meshes with the helical gear 33 of each guide vane 3 through its helical teeth. This allows the device to control the synchronous rotation of each guide vane 3 by rotating the linkage rotating ring 4, thereby controlling the reverse flow angle of the linkage rotating ring 4. The linkage inclined block 43 is installed on the side wall of the linkage rotating ring 4 through the rotating frame 42. The electric telescopic rod 5 fixed on the top surface of the hoisting ring 12 is linked with the sliding rod groove 44 opened on the inclined wall of the linkage inclined block 43 through the lifting slide rod 51. This allows the device to control the overall rotation of the linkage rotating ring 4 within a certain range by raising and lowering the electric telescopic rod 5, thereby driving the helical gear 33 to rotate, realizing the overall synchronous rotation of the guide vane 3 in the guide cover 1, changing its tilt angle in the guide cover 1, adapting to the changes in the liquid flow rate in the pump body, and ensuring the guiding effect of the device on the fluid in the body.
[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A submerged inlet guide vane for a vertical centrifugal pump, comprising a guide vane body (1), characterized in that: The interior of the flow guide cover (1) is fixed to a hub (2) by a connecting rod. The axis of the hub (2) coincides with the center line of the flow guide cover (1). Multiple shaft grooves (21) are provided on the outer wall of the hub (2) near the bottom. The multiple shaft grooves (21) are installed at equal angles along the outer periphery of the hub (2). Multiple shaft mounting holes (11) are provided on the lower part of the outer wall of the flow guide cover (1). The multiple shaft mounting holes (11) are respectively located at the vertical angles of the multiple shaft grooves (21). At the projection point, multiple guide vanes (3) are installed inside the guide shroud (1). A first mounting shaft (31) is vertically fixed to one side of the multiple guide vanes (3). The outer wall of the first mounting shaft (31) is engaged with the inner wall of the shaft groove (21). A second mounting shaft (32) is fixed to the other side of the guide vanes (3). The outer wall circular plate of the second mounting shaft (32) is fitted into the shaft mounting hole (11). A helical gear (33) is fixed to one end of the second mounting shaft (32).
2. The submerged inlet guide vane for a vertical centrifugal pump according to claim 1, characterized in that: A lifting ring (12) is fixed at the center of the outer wall of the flow guide shroud (1), and a linkage rotating ring (4) is suspended at the bottom of the lifting ring (12) through a circular ring.
3. A submerged inlet guide vane for a vertical centrifugal pump according to claim 2, characterized in that: The bottom of the linkage rotating ring (4) is fitted with a helical gear ring (41) through a circular groove, and the helical gear ring (41) and the helical gear (33) mesh with each other.
4. A submerged inlet guide vane for a vertical centrifugal pump according to claim 3, characterized in that: The outer wall of the linkage rotating ring (4) is vertically fixed with multiple rotating frames (42).
5. A submerged inlet guide vane for a vertical centrifugal pump according to claim 4, characterized in that: A linkage inclined block (43) is vertically fixed to one end side wall of the rotating frame (42).
6. A submerged inlet guide vane for a vertical centrifugal pump according to claim 5, characterized in that: The inclined wall of the linkage inclined block (43) is provided with a sliding rod groove (44).
7. A submerged inlet guide vane for a vertical centrifugal pump according to claim 6, characterized in that: An electric telescopic rod (5) is provided below the linkage inclined block (43), and one end of the electric telescopic rod (5) is vertically fixed to the top surface of the lifting ring (12).
8. A submerged inlet guide vane for a vertical centrifugal pump according to claim 7, characterized in that: One end of the electric telescopic rod (5) is fixedly connected to a lifting slide rod (51), which is slidably installed inside the slide rod groove (44).